U.S. patent application number 10/239868 was filed with the patent office on 2003-07-31 for western water closet.
Invention is credited to Miwa, Koji, Nakamura, Shoichi.
Application Number | 20030140406 10/239868 |
Document ID | / |
Family ID | 27573698 |
Filed Date | 2003-07-31 |
United States Patent
Application |
20030140406 |
Kind Code |
A1 |
Miwa, Koji ; et al. |
July 31, 2003 |
Western water closet
Abstract
The present invention provides a sanitary western-style flush
toilet in which stains are hardly adhered to a rim, and as a
result, a nasty smell and the like are hardly generated. A
western-style toilet body comprises a bowl portion and an open rim.
The open rim has a rim channel in the inside thereof. At the rear
of the western-style toilet body, a washing device which is capable
of spouting water is formed. The bowl portion is washed by the
water which is spouted from the washing device. An inward surface
of an inner side wall portion of the open rim is an identical
surface to a bowl face of the bowl portion.
Inventors: |
Miwa, Koji; (Aichi, JP)
; Nakamura, Shoichi; (Aichi, JP) |
Correspondence
Address: |
OBLON, SPIVAK, MCCLELLAND, MAIER & NEUSTADT, P.C.
1940 DUKE STREET
ALEXANDRIA
VA
22314
US
|
Family ID: |
27573698 |
Appl. No.: |
10/239868 |
Filed: |
October 3, 2002 |
PCT Filed: |
March 15, 2001 |
PCT NO: |
PCT/JP01/02080 |
Current U.S.
Class: |
4/420 |
Current CPC
Class: |
E03D 11/08 20130101;
E03D 2201/30 20130101; E03D 11/02 20130101; E03D 2201/40
20130101 |
Class at
Publication: |
4/420 |
International
Class: |
E03D 011/00 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 10, 2000 |
JP |
2000107497 |
Apr 11, 2000 |
JP |
2000109256 |
Apr 11, 2000 |
JP |
2000109259 |
Apr 25, 2000 |
JP |
2000124064 |
Apr 25, 2000 |
JP |
2000124116 |
May 1, 2000 |
JP |
2000132082 |
May 1, 2000 |
JP |
2000132084 |
May 1, 2000 |
JP |
2000132085 |
Claims
What is claimed is:
1. A western-style flush toilet including a western-style toilet
body comprising a bowl portion and a rim which is formed at an
upper periphery of said bowl portion and which has a rim channel in
the inside thereof, and a washing device which is capable of
spouting water to said rim channel, wherein said water which is
spouted from said washing device is provided for washing said bowl
portion by way of said rim channel, the improvement being
characterized in that an inward surface of said rim is an identical
surface to a bowl face of said bowl portion at least at the front
side.
2. A western-style flush toilet including a western-style toilet
body comprising a bowl portion and a rim which is formed at an
upper periphery of said bowl portion and which has a rim channel in
the inside thereof, and a washing device which is capable of
spouting water to said rim channel, wherein said water which is
spouted from said washing device is provided for washing said bowl
portion by way of said rim channel, the improvement being
characterized in that an inward surface of said rim is positioned
outwardly with respect to a bowl face of said bowl portion at least
at the front side.
3. A western-style flush toilet including a bowl portion, a trap
portion which is connected to a lower edge of said bowl portion and
a jet opening which is mounted at said trap portion in order to
spout water along said trap portion, wherein said bowl portion and
said trap portion are constituted by a western-style toilet body
made of porcelain, and said jet opening is constituted by a jet
nozzle which is connected to a washing device capable of spouting
said water by way of a jet pipe, the improvement being
characterized in that said jet pipe is heated by a heater which
heats said trap portion.
4. A western-style flush toilet according to claim 3, wherein said
heater has faces and surrounds said trap portion, and said jet pipe
is positioned near said heater.
5. A western-style flush toilet according to claim 3, wherein said
heater has faces and surrounds said trap portion and said jet
pipe.
6. A western-style flush toilet including a bowl portion, a trap
portion which is connected to a lower edge of said bowl portion and
a jet opening which is mounted at said trap portion in order to
spout water along said trap portion, wherein said bowl portion and
said trap portion are constituted by a western-style toilet body
made of porcelain, and said jet opening is constituted by a jet
nozzle which is connected to a washing device capable of spouting
said water by way of a jet pipe, the improvement being
characterized in that said jet pipe is prevented from a dew drop by
means of an anticondensation material which prevents said trap
portion from a dew drop.
7. A western-style flush toilet including a western-style toilet
body comprising a bowl portion, a rim which is formed at an upper
periphery of said bowl portion and which has a rim channel in the
inside thereof and a trap portion which is connected to a lower
edge of said bowl portion, and a washing device which is capable of
spouting water to said rim channel, wherein said water which is
spouted from said washing device is provided for washing said bowl
portion by way of said rim channel, the improvement being
characterized in that said rim channel is exposed to said bowl
portion, and said washing device is mounted in such a manner that
said water is spouted to the inside of said rim channel from only
one direction.
8. A western-style flush toilet including a bowl portion, a trap
portion which is connected to a lower edge of said bowl portion and
a jet opening which is mounted at said trap portion in order to
spout water along said trap portion, the improvement being
characterized in that said trap portion has a reflecting surface by
which said water spouted from said jet opening is reflected toward
a water discharge opening of said trap portion.
9. A western-style flush toilet according to claim 8, wherein said
water which is spouted from said jet opening is reflected toward
the vertical direction by said reflecting surface.
10. A western-style flush toilet according to claim 8 or claim 9,
wherein said jet opening is mounted in such a manner that said
water is spouted along a lower side wall face of said trap
portion.
11. A western-style flush toilet according to claim 10, wherein a
reserved portion which reserves a slurry as in a small amount as
possible at the time of casting a sludge, and said lower side wall
face which is connected to said reserved portion and which is
extended in parallel to the spouting direction of said water
spouted from said jet opening are formed at a bottom portion of a
reserved water portion of said trap portion which ensures reserved
water.
12. A western-style flush toilet including a western-style toilet
body comprising a bowl portion and a trap portion which is
connected to a lower edge of said bowl portion, wherein said bowl
portion is washed by water, and said water is discharged to a rear
side along said trap portion, the improvement being characterized
in that a top edge of said trap portion which forms reserved water
in said bowl portion is positioned in front of a rear edge of said
bowl portion.
13. A western-style flush toilet according to claim 12, wherein a
rear wall of said trap portion is positioned in front of the rear
edge of said bowl portion.
14. A western-style flush toilet according to claim 12 or claim 13,
wherein a pair of toilet seat mounting holes is formed at the rear
of said bowl portion, and the top edge of said trap portion is
positioned in front of each of said toilet seat mounting holes.
15. A western-style flush toilet including a western-style toilet
body comprising a bowl portion and a trap portion which is
connected to a lower edge of said bowl portion, wherein said bowl
portion is washed by water, and said water is discharged to a rear
side along said trap portion, the improvement being characterized
in that the center of an inlet port which ranges from said bowl
portion to said trap portion and which is extended in the
horizontal direction of said trap portion is positioned in front of
the center of said bowl portion in the horizontal direction.
16. A western-style flush toilet including a western-style toilet
body comprising a bowl portion and a trap portion which is
connected to a lower edge of said bowl portion, wherein said bowl
portion is washed by water, the improvement being characterized in
that a washing device which is directly connected to a city water
service pipe for supplying water from the outside and which is
capable of spouting said water under the city water pressure by
opening and closing an open/close valve is provided, a water
discharge socket made of resin which has an orifice for generating
a siphon effect inside thereof is provided at a water discharge
opening of said trap portion, and said water discharge socket is
connected to a water discharge pipe which is protruded from a floor
surface.
Description
TECHNICAL FIELD
[0001] First to ninth inventions relate to a western-style flush
toilet.
BACKGROUND ART
[0002] Conventionally, there has been known a western-style flush
toilet which includes a western-style toilet body made of porcelain
and a washing device having a water tank such as a low tank which
is mounted at the rear of the western-style toilet body and which
is capable of spouting water. The western-style toilet body
comprises a bowl portion, a rim which is formed at an upper
periphery of the bowl portion and which has a rim channel capable
of flowing water downward to the bowl portion in the inside thereof
and a trap portion which is connected to a lower edge of the bowl
portion. The trap portion has a jet opening for spouting water
along the trap portion. In the washing device, the water tank is
connected to a water supply pipe such as a city water service pipe
for supplying water, and the water reserved in the water tank which
is capable of being spouted to the rim channel.
[0003] A rim in which a rim channel is exposed to a bowl portion,
so-called "an open rim" comprises an upper side wall portion which
is protruded inwardly from an upper periphery of the bowl portion
in an approximately horizontal direction and an inner side wall
portion which is extended from an inner edge of the upper side wall
portion in an approximately vertical direction. A rim channel for
guiding the water which is spouted from a washing device is formed
in the inside of the open rim. In the open rim, the water in the
rim channel is spouted to the bowl portion by way of an opening
which is formed by the inner side wall portion and the bowl
portion.
[0004] A rim in which a rim channel is not exposed to a bowl
portion, so-called "a closed rim" comprises an upper side wall
portion which is protruded inwardly from an upper periphery of the
bowl portion in an approximately horizontal direction, an inner
side wall portion which is extended from an inner edge of the upper
side wall portion in an approximately vertical direction and a
lower side wall portion for connecting a lower edge of the inner
side wall portion to the bowl portion. The same rim channel as that
of the open rim is formed in the inside of the closed rim. In the
closed rim, plural water spout openings which open toward the bowl
portion are mounted in the lower side wall portion, and the water
in the rim channel is spouted to the bowl portion by way of these
water spout openings.
[0005] As a result, in the conventional western-style flush toilet,
the bowl portion is washed by the water which is spouted from the
washing device.
[0006] Furthermore, in the conventional western-style flush toilet,
the bowl portion and the trap portion are constituted by the
western-style toilet body made of porcelain, and the jet opening is
constituted by a jet nozzle which is separated from the
western-style toilet body. The jet nozzle is connected to the
washing device by way of a jet pipe.
[0007] In such a western-style flush toilet, the water which is
spouted from the washing device is supplied to the rim channel, and
due to this, the bowl portion is washed and the reserved water is
ensured. Furthermore, the water is also supplied to the jet opening
by way of the jet pipe, and this forcibly generates a siphon effect
so that the discharge of filth can be performed even by a small
amount of water. Accordingly, in the western-style flush toilet,
the reduction of the running cost can be realized by saving water.
Besides, in the western-style flush toilet, the western-style
toilet body made of porcelain has a relatively simple configuration
so that the reduction of the manufacturing cost can be
realized.
[0008] In addition, there have been known other modifying
western-style flush toilets such as the western-style flush toilet
in which an anticondensation material is arranged below a trap
portion, and the western-style flush toilet in which a jet pipe is
surrounded by the other anticondensation material.
[0009] In such western-style flush toilets, even if they are used
under the condition that the difference between the water
temperature and the room temperature is large and the moisture is
high, the trap portion and the jet pipe can be prevented from the
heat mainly by the anticondensation material. As a result, it is
possible to prevent the trap portion and an outer surface of the
jet pipe from a dew drop.
[0010] For example, the western-style flush toilet shown in FIG. 28
includes a bowl portion 91 which has a bowl face 91a and a trap
portion 92 which is connected to a bottom portion of the bowl
portion 91 by means of a western-style toilet body 90 made of
porcelain. The uppermost portion of the trap portion 92 is an upper
side wall face 92a which is constituted by a curved surface, and
the upper side wall face 92a is connected downward to a water
discharge opening 92b. The water discharge opening 92b is connected
to a water discharge pipe not shown in the drawing by way of a
water discharge socket 98.
[0011] Furthermore, at the bottom portion of the bowl portion 91, a
jet room 94 which is connected to a jet channel not shown in the
drawing is formed, and a jet opening 93 which is communicated with
the lowermost portion of the jet room 94 is mounted in a bottom
portion of a reserved water portion of the trap portion 92 for
ensuring the reserved water. In addition, at a rear upper portion
of the bowl portion 91, a water supply room 95 is formed, and the
water supply room 95 is connected to a low tank not shown in the
drawing by way of a distributor 97 which is a part of a washing
device. Besides, a rim 96 which has a rim channel 96a in the inside
thereof is formed at an upper portion of the bowl portion 91.
[0012] In such a western-style flush toilet, water is supplied from
the law tank to the jet room 94 and the rim channel 96aby way of
the distributor 97 and the water supply room 95. The water supplied
to the jet room 94 is spouted from the jet opening 93 toward the
trap portion 92. On the while, the water supplied to the rim
channel 96a flows out from plural water spout openings, which are
mounted in a lower edge of the rim 96 and which are not shown in
the drawing, to wash the bowl face 91a of the bowl portion 91. At
this time, in the western-style flush toilet, the water which is
spouted from the jet opening 93 forcibly generates a siphon effect
so that the filth discharging ability is large.
[0013] Furthermore, the western-style flush toilet shown in FIGS.
29 and 30 includes a western-style toilet body 91 made of
porcelain, a water tank which supplies water to the western-style
toilet body 91 and which is not shown in the drawing and a washing
device such as a distributor 92 or the like. The western-style
toilet body 91 comprises a bowl portion 93, a rim 94 which is
formed at the whole of the upper periphery of the bowl portion 93
and which has a rim channel 94a capable of flowing water downward
to the bowl portion 93 in the inside thereof and a trap portion 95
which is connected to a lower edge of the bowl portion 93. A water
discharge socket which extends upward and downward and which is not
shown in the drawing is connected to a water discharge opening 95c
of the trap portion 95, and the water discharge socket is connected
to a water discharge pipe which is protruded from a floor surface
and which is not shown in the drawing.
[0014] In such a western-style flush toilet, the water reserved in
the water tank is supplied to the rim channel 94a by way of the
distributor 92, and then, the water flows downward to the bowl
portion 93. After washing the bowl portion 93, the water generates
a siphon effect by means of the trap portion 95, and the water
together with filth is discharged to the rear side along the trap
portion 95.
[0015] Moreover, in the common western-style flush toilet, a water
discharge flange made of metal is connected to a water discharge
pipe which is protruded from a floor surface, and a discharge
opening of a trap portion is connected to the water discharge
flange made of metal.
[0016] In such a western-style flush toilet, a bowl portion is
washed by the water which is supplied from a water tank. When the
filth water containing the water and filth is discharged by way of
a trap portion, the filth water is partly cut off by a stepped
portion which is formed in the trap portion, and as a result, the
turbulence is generated to form a water screen. Because of the
function of such a water screen, the trap portion is filled with
the filth water, and after that, the filled filth water is
discharged to the water discharge pipe by breaking the water screen
in such a manner that the filth water is dragged into the side of
the water discharge pipe.
DISCLOSURE OF THE INVENTION
[0017] {First and Second Inventions}
[0018] However, in the above-mentioned conventional western-style
flush toilet, an inward surface of the rim is protruded inwardly
with respect to the bowl face of the bowl portion so that stains
are likely to be adhered to the rim. As a result, a nasty smell is
easily generated, and the rim is apt to be insanitary.
[0019] Namely, in the open rim of the conventional western-style
flush toilet, stains caused by a splash of urine generated at the
time of using the toilet or a splash generated at the time of going
to defecate are likely to be adhered to the rim channel such as a
rear side of the upper side wall portion or a rear side of the
inner side wall portion. Besides, in the closed rim of the
conventional western-style flush toilet, the bove-mentioned stains
are apt to be adhered to the inside of the rim channel through a
front side of the lower side wall portion or the water spout
openings. Such stains adhered to the rim exist at the position
which a cleaning person hardly sees. So, it is difficult for the
cleaning person to confirm whether or not the stains are adhered or
removed, and this makes the cleaning incomplete. As a result, the
stains easily remain at the position, and a nasty smell such as
ammonia is generated. Accordingly, the person who uses the
conventional western-style flush toilet feels uncomfortable, and
the western-style flush toilet becomes insanitary.
[0020] The first and second inventions have been made in view of
the above circumstances and it is the first and second tasks to be
solved to provide a sanitary western-style flush toilet in which
stains are difficult to be adhered to a rim, and a nasty smell is
hardly generated.
[0021] With respect to the western-style flush toilet of the first
invention, in a western-style flush toilet including a
western-style toilet body comprising a bowl portion and a rim which
is formed at an upper periphery of the bowl portion and which has a
rim channel in the inside thereof, and
[0022] a washing device which is capable of spouting water to the
rim channel, wherein the water which is spouted from the washing
device is provided for washing the bowl portion by way of the rim
channel,
[0023] the improvement is characterized in that an inward surface
of the rim is an identical surface to a bowl face of the bowl
portion at least at the front side.
[0024] In the western-style flush toilet of the first invention,
the inward surface of the rim is an identical surface to the bowl
face of the bowl portion at least at the front side, so stains are
hardly adhered to the rim. For example, if the rim is an open rim,
stains are hardly adhered to the rim channel such as a rear side of
an upper side wall portion or a rear side of an inner side wall
portion. Besides, if the rim is a closed rim, stains are hardly
adhered to the inside of the rim channel through a front side of a
lower side wall portion or water spout openings.
[0025] Furthermore, in the western-style flush toilet of the first
invention, since the inward surface of the rim is an identical
surface to the bowl face of the bowl portion, stains exist at the
position which a cleaning person easily sees, and in addition, the
stains are easily wiped out at one time. Accordingly, it is
possible for the cleaning person to carry out the cleaning
satisfactorily.
[0026] In the western-style flush toilet of the first invention, if
the inward surface of the rim is an identical surface to the bowl
face of the bowl portion at least at the front side, the minimum
operation and effect of the first invention can be obtained. The
reason of this is that stains caused by a splash of urine generated
at the time of using the toilet or a splash generated at the time
of going to defecate are likely to be positioned at the front side.
In this respect, it is desirable that the inward surface of the rim
is an identical surface to the bowl face of the bowl portion at the
whole of the upper periphery of the bowl portion. With such a
constitution, it is possible to prevent the stains which is caused
by a splash of urine generated at the time of using the toilet or a
splash generated at the time of going to defecate from being
adhered to the rim at any position of the upper periphery of the
bowl portion, and the operation and effect of the first invention
can be surely achieved.
[0027] With respect to the western-style flush toilet of the second
invention, in a western-style flush toilet including a
western-style toilet body comprising a bowl portion and a rim which
is formed at an upper periphery of the bowl portion and which has a
rim channel in the inside thereof, and
[0028] a washing device which is capable of spouting water to the
rim channel, wherein the water which is spouted from the washing
device is provided for washing the bowl portion by way of the rim
channel,
[0029] the improvement is characterized in that an inward surface
of the rim is positioned outwardly with respect to a bowl face of
the bowl portion at least at the front side.
[0030] In the western-style flush toilet of the second invention,
the inward surface of the rim is positioned outwardly with respect
to the bowl face of the bowl portion at least at the front side, so
stains are hardly adhered to the rim as well.
[0031] Furthermore, in the western-style flush toilet of the second
invention, since the inward surface of the rim is positioned
outwardly with respect to the bowl face of the bowl portion, stains
exist at the position which a cleaning person easily sees, and it
is possible for the cleaning person to carry out the cleaning
satisfactorily. However, the ease of wiping out the stains is
somewhat inferior as compared with the western-style flush toilet
of the first invention.
[0032] In the western-style flush toilet of the second invention,
if the inward surface of the rim is positioned outwardly with
respect to the bowl face of the bowl portion at least at the front
side, the minimum operation and effect of the second invention can
be obtained. In addition, it is desirable that the inward surface
of the rim is positioned outwardly with respect to the bowl face of
the bowl portion at the whole of the upper periphery of the bowl
portion.
[0033] In the western-style flush toilet of the first and second
inventions, it is desirable that the western-style flush toilet has
a stepped portion which forms the rim channel at a boundary between
the bowl portion and the rim. With such a constitution, the water
which is spouted from the washing device doesn't flow downward to
the bowl portion immediately, and the water gradually flows
downward to the bowl portion to be discharged while whirling
satisfactorily in the rim channel. As a result, it is possible to
improve the washing effect of the whole of the bowl portion.
[0034] Moreover, in the western-style flush toilet of the first and
second inventions, the rim channel may open at the whole periphery
between the inward surface of the rim and the bowl face of the bowl
portion. It is so-called an open rim. With such a constitution, it
is possible to obtain an advantage in the manufacturing cost.
[0035] On the other hand, in the western-style flush toilet of the
first and second inventions, the rim channel may open by means of
water spout openings between the inward surface of the rim and the
bowl face of the bowl portion. It is so-called a closed rim. With
such a constitution, although there is a disadvantage in the
manufacturing cost, an amount of water which is spouted to the bowl
portion is easily adjusted by the water spout openings so that the
washing effect of the whole of the bowl portion can be
improved.
[0036] {Third Invention}
[0037] However, in the above-mentioned conventional western-style
flush toilet, provided that the western-style flush toilet is used
in a cold area, water and the like in the trap portion would be
frozen. As a result, there exists the possibility that the
western-style flush toilet may not be used during the cold season,
and that it may be damaged.
[0038] In this regard, a heater may bemounted below the trap
portion. With such a constitution, even if the western-style flush
toilet is used in a cold area, the trap portion can be heated by
the heater. So, the water and the like in the trap portion is
prevented from being freezing, and it is realized that the
western-style flush toilet can be used during the cold season, and
that the western-style flush toilet can be prevented from being
damaged.
[0039] However, in such a western-style flush toilet, even if the
heater is mounted below the trap portion, there is the case that
water in the jet pipe is frozen. Especially, in the western-style
flush toilet, since the jet pipe is separated from the
western-style toilet body having the heater, there is more tendency
that the water in the jet pipe is frozen as compared with the
conventional western-style flush toilet in which a western-style
toilet body has a jet channel. In this case, if the jet pipe is
heated by the other heater except the heater for heating the trap
portion, the manufacturing cost would be pushed up. In such a case,
it is impossible to realize the reduction of the manufacturing cost
and the running cost, simultaneously with the keeping of the
condition that the western-style flush toilet can be used during
the cold season and the prevention of the western-style flush
toilet from being damaged.
[0040] The third invention has been made in view of the above
circumstances and it is the third task to be solved to provide a
western-style flush toilet which can realize the reduction of the
manufacturing cost and the running cost, simultaneously with the
keeping of the condition that the western-style flush toilet can be
used during the cold season and the prevention of the western-style
flush toilet from being damaged.
[0041] With respect to the western-style flush toilet of the third
invention, in a western-style flush toilet including a bowl
portion, a trap portion which is connected to a lower edge of the
bowl portion and a jet opening which is mounted at the trap portion
in order to spout water along the trap portion, wherein the bowl
portion and the trap portion are constituted by a western-style
toilet body made of porcelain, and the jet opening is constituted
by a jet nozzle which is connected to a washing device capable of
spouting the water by way of a jet pipe,
[0042] the improvement is characterized in that the jet pipe is
heated by a heater which heats the trap portion.
[0043] In the western-style flush toilet of the third invention,
since the jet pipe is heated by the heater which heats the trap
portion, water in the jet pipe can be prevented from being freezing
even if the western-style flush toilet is used in a cold area.
Accordingly, it is possible to realize the reduction of the running
cost by saving water, simultaneously with the keeping of the
condition that the western-style flush toilet can be used during
the cold season and the prevention of the western-style flush
toilet from being damaged. Besides, a unique heater for the jet
pipe is unnecessary, and the reduction of the manufacturing cost
can be realized.
[0044] It is preferable that an object having faces is adopted as
the heater. Such a heater has been already known. The heater like
this can easily surround the trap portion, and the operation and
effect of the third invention can be realized by positioning the
jet pipe near the heater. In addition, such a heater can easily
surround the trap portion and the jet pipe so that the operation
and effect of the third invention can be realized.
[0045] In the western-style toilet body, an opening for guiding the
jet pipe toward the inside can be formed. On the other hand, it is
general that a code which is connected to an external power source
is formed at the heater. It is preferable that such a code opens at
the opening in the western-style toilet body. Otherwise, an opening
into which a code is inserted should be separately formed in the
western-style toilet body so that it becomes cumbersome to
manufacture the western-style toilet body. As a result, this pushes
up the manufacturing cost, and furthermore, an appearance is
deteriorated. The opening like this is preferably mounted in the
position which is likely to be seen from the upper part. Due to
this, an assembling of the western-style flush toilet is
improved.
[0046] As the washing device, except the conventional water tank,
it is possible to adopt a washing device which is directly
connected to a water supply pipe such as a city water service pipe
for supplying water from the outside, and which is capable of
spouting water by opening and closing an open/close valve. In case
such a latter washing device is adopted, the effect of the third
invention is large because of the following situations. With
respect to the prior party washing device, water is once reserved
and then spouted. So, at the time of reserving the water, the
reserved water is heated by other heater or the like, and it is
relatively easy to prevent water in the jet pipe from being
freezing. On the contrary, in the latter washing device, since
fresh water is spouted from the water supply pipe of the outside
from time to time, water existed in the outside flows in the jet
pipe, and the water is likely to be frozen in the jet pipe during
the cold season.
[0047] {Fourth Invention}
[0048] However, in the above-mentioned conventional western-style
flush toilet, an anticondensation material of the trap portion is
separated from an anticondensation material of the jet pipe. As a
result, this pushes up the manufacturing cost.
[0049] The fourth invention has been made in view of the above
circumstances and it is the fourth task to be solved to provide a
western-style flush toilet which can realize the reduction of the
manufacturing cost.
[0050] With respect to the western-style flush toilet of the fourth
invention, in a western-style flush toilet including a bowl
portion, a trap portion which is connected to a lower edge of the
bowl portion and a jet opening which is mounted at the trap portion
in order to spout water along the trap portion, wherein the bowl
portion and the trap portion are constituted by a western-style
toilet body made of porcelain, and the jet opening is constituted
by a jet nozzle which is connected to a washing device capable of
spouting the water by way of a jet pipe,
[0051] the improvement is characterized in that the jet pipe is
prevented from a dew drop by means of the anticondensation material
which prevents the trap portion from a dew drop.
[0052] In the western-style flush toilet of the fourth invention,
the jet pipe is prevented from a dew drop by means of the
anticondensation material which prevents the trap portion from a
dew drop. Accordingly, a unique anticondensation material for the
jet pipe is unnecessary, and the reduction of the manufacturing
cost can be realized.
[0053] In the western-style toilet body, an opening for guiding the
jet pipe toward the inside can be formed. In case such an opening
is formed, the opening is required to be sealed. Otherwise, fresh
air containing moisture is intruded into the inside including the
trap portion and the jet pipe through the opening, so the
anticondensation effect is deteriorated. The opening like this is
preferably mounted in the position which is likely to be seen from
the upper part. Due to this, an assembling of the western-style
flush toilet is improved.
[0054] As the washing device, except the conventional water tank,
it is possible to adopt a washing device which is directly
connected to a water supply pipe such as a city water service pipe
for supplying water from the outside, and which is capable of
spouting water by opening and closing an open/close valve. In case
such a latter washing device is adopted, the effect of the fourth
invention is large because of the following situations With respect
to the prior party washing device, water is once reserved and then
spouted. At the time of reserving the water, the temperature of
water in the jet pipe easily becomes the same level as the
temperature of the inside of a toilet room. So, a dew drop is
hardly generated at an outer surface of the jet pipe. On the
contrary, in the latter washing device, since fresh water is
spouted from the water supply pipe of the outside from time to
time, water existed in the outside flows in the jet pipe, and the
difference is easily to be generated between the temperature at the
inside of the jet pipe and the temperature at the outside of the
jet pipe. If an anticondensation material is not provided, a dew
drop is likely to be generated in the jet pipe.
[0055] {Fifth Invention}
[0056] However, in the above-mentioned conventional western-style
flush toilet, whether the rim is an open rim or a closed rim, in
case the washing device is mounted in such a manner that water is
spouted to the inside of the rim channel from both of right and
left directions, the two flows of water from two directions come
into collision in the rim channel and/or at the front side of the
bowl portion. Accordingly, a noise is generated at the time of
collision, and there is a lack of quietness. Besides, in such a
western-style flush toilet, there exists the possibility that a
floor surface gets wet because water is splashed on the floor
surface and the like by means of the collision of the water at the
front side of the bowl portion.
[0057] In this respect, when the western-style flush toilet adopts
a closed rim, even if the washing device is mounted in such a
manner that water is spouted to the inside of the rim channel from
both of right and left directions, by slanting water spout openings
which are mounted in the lower side wall portion, the water is made
to whirl easily in the bowl portion to ensure the filth discharge
ability. As a result, the collision of the water at the front side
of the bowl portion can be softened, and the quietness can be
realized in some degree. At the same time, it is possible to
prevent water from being splashed on the floor surface. However,
with such a constitution, since the water spout openings should be
mounted accurately, the constitution of the rim becomes
complicated. So, the number of the manufacturing process increases,
and accordingly, this pushes up the manufacturing cost.
Furthermore, in such a western-style flush toilet, when the washing
begins, water and air are mixed in the closed rim, and the mixed
water is spouted from plural water spout openings. At this time, a
noise is still generated easily, and there is a lack of quietness.
Thus, as far as the closed rim is adopted, even if the washing
device is mounted in such a manner that water is spouted to the
inside of the rim channel from only one direction, there exists the
possibility that problems such as the rising up of the
manufacturing cost and the lack of the quietness remain.
[0058] The fifth invention has been made in view of the above
circumstances and it is the fifth task to be solved to provide a
western-style flush toilet which is excellent in the quietness,
which has no possibility that the floor surface gets wet, which is
excellent in the washing ability of the bowl portion and the filth
discharging ability, and which can realize the reduction of the
manufacturing cost.
[0059] With respect to the western-style flush toilet of the fifth
invention, in a western-style flush toilet including a
western-style toilet body comprising a bowl portion, a rim which is
formed at an upper periphery of the bowl portion and which has a
rim channel in the inside thereof and a trap portion which is
connected to a lower edge of the bowl portion, and
[0060] a washing device which is capable of spouting water to the
rim channel, wherein the water which is spouted from the washing
device is provided for washing the bowl portion by way of the rim
channel,
[0061] the improvement is characterized in that the rim channel is
exposed to the bowl portion, and the washing device is mounted in
such a manner that the water is spouted to the inside of the rim
channel from only one direction.
[0062] In the western-style flush toilet of the fifth invention,
the water is spouted toward the rim channel from the washing
device. Since the water is spouted from only one direction, the
water gradually flows downward to the bowl portion while being
guided in one direction. Then, the water whirls in one direction
(one-way whirling) at the bowl portion to be discharged by way of
the trap portion. So, the water doesn't come into collision in the
rim channel and/or at the front side of the bowl portion, and a
noise is not generated. Besides, since the western-style flush
toilet adopts an open rim in which the rim channel is exposed to
the bowl portion, when the washing begins, water and air are not
mixed, and the water is spouted from an opening which is broader
than the water spout opening of the closed rim. Accordingly, at
this time, a noise is not generated. Therefore, the western-style
flush toilet of the fifth invention is excellent in the
quietness.
[0063] In such a western-style flush toilet, the collision of the
water at the front side of the bowl portion is not generated, so
water is not splashed, and there is no possibility that a floor
surface gets wet. Furthermore, in the western-style flush toilet,
by strengthening water force, the washing ability of the bowl
portion can be ensured. In addition, the water whirls in one
direction (one-way whirling) at the bowl portion to be discharged,
so the filth discharging ability is also excellent.
[0064] Moreover, the western-style flush toilet has no water spout
openings, so the constitution of the rim is simple. As a result,
the number of the manufacturing process is limited, and
accordingly, the reduction of the manufacturing cost can be
realized.
[0065] In the western-style flush toilet of the fifth invention, it
is desirable to have a partition wall by which the rim channel is
separated from the rear side. With such a constitution, water is
never guided to the rear side, so water is not used in vain, and
the effect of saving water is large.
[0066] Furthermore, it is desirable that the western-style flush
toilet of the fifth invention has a stepped portion which forms the
rim channel at a boundary between the bowl portion and the rim.
With such a constitution, the stepped portion firmly forms the rim
channel, so the water which is spouted from the washing device is
likely to be guided toward a downstream side satisfactorily. As a
result, the washing of the bowl portion is satisfactorily carried
out, and the filth discharging ability becomes further
excellent.
[0067] The stepped portion is desirably formed in such a manner
that the water is guided to the bowl portion and the downstream
side at an upstream side of the water which is spouted from the
washing device, and that the water is guided only to the bowl
portion at the most downstream side. With such a constitution, the
water which is spouted from the washing device doesn't flow
downward to the bowl portion immediately at the upstream side of
the rim channel. Namely, the water is guided to the most downstream
side, and it flows downward to the bowl portion. So, the washing of
the bowl portion can be carried out satisfactorily. Besides, due to
this, the water easily whirls in the bowl portion, and the filth
discharging ability can be improved. In addition, since the water
is guided only to the bowl portion at the most downstream side, the
water is not circulated again, and it doesn't remain in the rim
channel. Therefore, water is not used in vain, and the effect of
saving water is large.
[0068] {Sixth Invention}
[0069] However, in the above-mentioned conventional western-style
flush toilet as shown in FIG. 28, due to the position and the
configuration of the upper side wall face 92a of the trap portion
92, the water which is spouted from the washing device by way of
the jet opening 93 is reflected toward various kinds of directions
by means of the upper side wall face 92a. Accordingly, in case the
water is not reflected toward the water discharge opening 92b of
the trap portion 92 by means of the upper side wall face 92a, the
water is subjected to the large resistance until it reaches the
water discharge opening 92b. In addition, there exists the
possibility that the water which is reflected toward various kinds
of directions by means of the upper side wall face 92a comes into
collision. As a result, the water discharging ability is
deteriorated, and a siphon effect is also deteriorated. So, in
order to make up such a deterioration of a siphon effect, namely,
the deterioration of the filth discharging ability, a large amount
of water cannot help being used.
[0070] The sixth invention has been made in view of the above
circumstances and it is the sixth task to be solved to provide a
western-style flush toilet which can discharge filth satisfactorily
by a small amount of water.
[0071] With respect to the western-style flush toilet of the sixth
invention, in a western-style flush toilet including a bowl
portion, a trap portion which is connected to a lower edge of the
bowl portion and a jet opening which is mounted at the trap portion
in order to spout water along the trap portion,
[0072] the improvement is characterized in that the trap portion
has a reflecting surface by which the water spouted from the jet
opening is reflected toward a water discharge opening of the trap
portion.
[0073] In the western-style flush toilet of the sixth invention,
the trap portion has the reflecting surface by which the water
spouted from the jet opening is reflected toward the water
discharge opening of the trap portion. Due to this, the reflected
water is discharged to the water discharge opening without being
collided with a wall face at the downstream side from the
reflecting surface, and there is little possibility that the
reflected water comes into collision. Accordingly, the water
discharging ability is improved, and a siphon effect is
strengthened.
[0074] It is desirable that the water which is spouted from the jet
opening is reflected toward the vertical direction by the
reflecting surface. Due to this, the discharging speed of the
reflected water is increased by the gravity. So, the water
discharging ability is improved, and a siphon effect is
strengthened. In addition, the filth discharging ability is
increased.
[0075] Besides, as for the reflecting surface, it is desirable that
an angle which is obtained by an imaginary line vertical to the
reflecting surface and the spouting direction of the water spouted
from the jet opening is equal to an angle which is obtained by the
imaginary line and the central direction of the water discharge
opening. In this manner, the water which is spouted from the jet
opening is guided to the central direction of the water discharge
opening with the water being reflected by the reflecting surface
only one time. So, the water reaches the water discharge opening
with maintaining its force and a siphon effect is strengthened by
means of high water discharging ability. On the other hand, if the
above two angles are not identical with each other, the water which
is spouted from the jet opening comes into collision many times
until it reaches the water discharge opening. So, the water shows
the large resistance, and the discharging speed is decreased. In
addition, the water discharging ability is poor, and a siphon
effect is deteriorated.
[0076] It is desirable that the jet opening is mounted in such a
manner that water is spouted along a lower side wall face of the
trap portion. Filth which may remain in reserved water is
sedimentated on the lower side wall face of the trap portion in
accordance with the lapse of time. So, if the jet opening spouts
water along the lower side wall face of the trap portion, the
sediment can be discharged without remaining in the trap portion,
and the filth can be surely discharged.
[0077] At a bottom portion of a reserved water portion of the trap
portion which ensures the reserved water, it is desirable that a
reserved portion which reserves a slurry as in a small amount as
possible at the time of casting a sludge, and the lower side wall
face which is connected to the reserved portion and which is
extended in parallel to the spouting direction of the water spouted
from the jet opening are formed. A western-style toilet body made
of porcelain which constitutes the western-style flush toilet of
the sixth invention has a complicated configuration, so it is
generally formed by the casting of the sludge. In such a casting,
it is convenient that the reserved portion which reserves the
slurry to be discharged is mounted at the bottom portion of the
reserved water portion of the trap portion which ensures the
reserved water. If such a reserved portion reserves a large amount
of slurry, the lower side wall face of the trap portion which is
connected to the reserved portion cannot be extended in parallel to
the spouting direction of the water spouted from the jet opening.
In this case, the sediment which is sedimentated on the lower side
wall face of the trap portion easily remains in the trap portion.
On the contrary, if the reserved portion reserves the slurry as in
a small amount as possible, the lower side wall face of the trap
portion can be extended in parallel to the spouting direction of
the water spouted from the jet opening. In this manner, the
sediment which is sedimentated on the lower side wall face of the
trap portion hardly remains in the trap portion.
[0078] As a washing device, except the conventional water tank such
as a low tank, it is possible to adopt a washing device which is
directly connected to a water supply pipe such as a city water
service pipe for supplying water from the outside, and which is
capable of spouting water by opening and closing an open/close
valve. In case such a washing device is adopted, the effect of the
sixth invention is large. In other words, if the jet opening is
connected to such a latter washing device, water is likely to be
spouted from the jet opening more powerfully as compared with the
case in which the jet opening is connected to the prior party
washing device.
[0079] {Seventh Invention}
[0080] However, in the above-mentioned conventional western-style
flush toilet as shown in FIG. 29, it is not considered that the
western-style toilet body 91 is miniaturized, so the western-style
flush toilet as a whole is likely to be a large size. Due to this,
the saving of spaces cannot be achieved at residences and the like
in recent years, and a toilet room which cannot ensure a relatively
large space becomes more and more narrow.
[0081] The seventh invention has been made in view of the above
circumstances and it is the seventh task to be solved to provide a
western-style flush toilet which can realize the miniaturization
thereof.
[0082] In order to solve the above-mentioned task, the present
inventor fully examined and paid attention to a top edge of the
trap portion which forms the reserved water in the bowl portion, a
rear wall of the trap portion and toilet seat mounting holes, and
then, the inventor completed the seventh invention.
[0083] With respect to the western-style flush toilet of the
seventh invention, in a western-style flush toilet including a
western-style toilet body comprising a bowl portion and a trap
portion which is connected to a lower edge of the bowl portion,
wherein the bowl portion is washed by water, and the water is
discharged to a rear side along the trap portion,
[0084] the improvement is characterized in that the top edge of the
trap portion which forms the reserved water in the bowl portion is
positioned in front of a rear edge of the bowl portion.
[0085] As shown in FIG. 29, in the conventional western-style flush
toilet, a top edge 95d of the trap portion 95 which forms the
reserved water in the bowl portion 93 in the western-style toilet
body 91 is necessarily positioned at the rear of a rear edge 93a of
the bowl portion 93. So, the whole length of the western-style
toilet body 91 which is constituted by the bowl portion 93 and the
trap portion 95 is necessarily long. On the contrary, in the
western-style flush toilet of the seventh invention, the top edge
of the trap portion is positioned in front of the rear edge of the
bowl portion, and the whole length of the western-style toilet body
is short.
[0086] In this western-style flush toilet, the top edge of the trap
portion is the portion which forms the reserved water in the bowl
portion, and at the same time, it is the uppermost position of an
inner bottom surface which forms an inverted U-shaped water
channel. The top edge of the trap portion is determined as a single
point or a horizontal line on the basis of a cross-sectional form
of the trap portion which crosses the discharging direction. The
rear edge of the bowl portion is the most rear side portion of an
opening of the bowl portion toward the upper part if a rim doesn't
exist. If a rim exists, the rear edge of the bowl portion is the
most rear side portion of a boundary between the bowl portion and
the rim. The rear edge of the bowl portion is also determined as a
single point or a horizontal line.
[0087] In the western-style flush toilet of the seventh invention,
it is preferable that the rear wall of the trap portion is
positioned in front of the rear edge of the bowl portion. As shown
in FIG. 29, in the conventional western-style flush toilet, a rear
wall 95e of the trap portion 95 is necessarily positioned at the
rear of the rear edge 93a of the bowl portion 93. So, the whole
length of the western-style toilet body 91 is necessarily long. On
the contrary, in the western-style flush toilet of the seventh
invention in which the rear wall of the trap portion is positioned
in front of the rear edge of the bowl portion, the whole length of
the western-style toilet body is further short.
[0088] Normally, in the western-style flush toilet, a pair of
toilet seat mounting holes for mounting a toilet seat, a toilet
seat having a heating function, a toilet seat having a part washing
function and the like is formed at the rear of the bowl portion. In
the western-style flush toilet of the seventh invention, it is also
preferable that the top edge of the trap portion is positioned in
front of each of the toilet seat mounting holes. As shown in FIG.
29, in the conventional western-style flush toilet, the top edge
95d of the trap portion 95 is necessarily positioned at the rear of
each of toilet seat mounting holes 96. So, the whole length of the
western-style toilet body 91 is necessarily long. On the contrary,
in the western-style flush toilet of the seventh invention in which
the top edge of the trap portion is positioned in front of each of
the toilet seat mounting holes, the whole length of the
western-style toilet body is further short.
[0089] In the western-style flush toilet of the seventh invention,
it is preferable that a downstream side from the top edge of the
trap portion is bent forwardly. If the whole length of the
western-style toilet body is short, at least a base seat portion
which conceals the trap portion can be also miniaturized. Thus, if
the base seat portion is miniaturized, the discharge opening of the
trap portion is easily close to a rear side wall face in the base
seat portion, and there exists the possibility that the discharge
opening is not preferably connected to the water discharge socket.
In this respect, as far as the downstream side from the top edge of
the trap portion is bent forwardly, even if the base seat portion
is miniaturized, the discharge opening is far from the rear side
wall face in the base seat portion, and the discharge opening is
preferably connected to the water discharge socket.
[0090] As a washing device, except the conventional water tank, it
is possible to adopt a washing device which is directly connected
to a water supply pipe such as a city water service pipe for
supplying water from the outside, and which is capable of spouting
water by opening and closing an open/close valve. In case such a
latter washing device is adopted, the effect of the seventh
invention is large. With respect to the prior party washing device,
water is once reserved and then spouted, so the device requires a
relatively large volume. Accordingly, in order to widen a narrow
toilet room, if the western-style toilet body of the seventh
invention is adopted while the device which requires a relatively
large volume is adopted, the effect of the seventh invention is
decreased. In this regard, if the latter washing device is adopted,
the prior party washing device is not required, so the effect of
the seventh invention which achieves to widen a narrow toilet room
is remarkably shown.
[0091] {Eighth Invention}
[0092] However, in the above-mentioned conventional western-style
flush toilet as shown in FIG. 30, it is not considered that the
western-style toilet body 91 is miniaturized, so the western-style
flush toilet as a whole is likely to be a large size. Due to this,
the saving of spaces cannot be achieved at residences and the like
in recent years, and a toilet room which cannot ensure a relatively
large space becomes more and more narrow.
[0093] The eighth invention has been made in view of the above
circumstances and it is the eighth task to be solved to provide a
western-style flush toilet which can realize the miniaturization
thereof.
[0094] In order to solve the above-mentioned task, the present
inventor fully examined and paid attention to the center of an
inlet port which ranges from the bowl portion to the trap portion
and which is extended in the horizontal direction, and then, the
inventor completed the eighth invention.
[0095] With respect to the western-style flush toilet of the eighth
invention, in a western-style flush toilet including a
western-style toilet body comprising a bowl portion and a trap
portion which is connected to a lower edge of the bowl portion,
wherein the bowl portion is washed by water, and the water is
discharged to a rear side along the trap portion,
[0096] the improvement is characterized in that the center of the
inlet port which ranges from the bowl portion to the trap portion
and which is extended in the horizontal direction of the trap
portion is positioned in front of the center of the bowl portion in
the horizontal direction.
[0097] As shown in FIG. 30, in the conventional western-style flush
toilet, the center TO of an inlet port TI which ranges from the
bowl portion 93 to the trap portion 95 and which is extended in the
horizontal direction of the trap portion 95 is necessarily
positioned at the rear of the center BO of the bowl portion 93 in
the horizontal direction. So, the whole length of the western-style
toilet body 91 which is constituted by the bowl portion 93 and the
trap portion 95 is necessarily long. On the contrary, in the
western-style flush toilet of the eighth invention, the center of
the inlet port of the trap portion is positioned in front of the
center of the bowl portion, and the whole length of the
western-style toilet body is short.
[0098] In this western-style flush toilet, the inlet port of the
trap portion is the portion which ranges from the bowl portion to
the trap portion, and it is extended in the horizontal direction.
The portion which ranges from the bowl portion to the trap portion
is determined by a lower edge of a rear wall of the bowl portion.
As shown in FIG. 21, if each edge TR, TF which is positioned
respectively in the front direction and the rear direction of the
inlet port TI is a single point, the center TO of the inlet port TI
of the trap portion is the middle point of a line segment TL which
connects the rear edge TR and the front edge TF because the inlet
port TI of the trap portion is formed in such a manner that the
left portion and the right portion thereof is symmetrical in a
normal western-style toilet body. Furthermore, as shown in FIG. 22,
if at least one of two edges which are positioned in the front and
rear directions of the inlet port TI is a horizontal line TH, the
center TO of the inlet port TI of the trap portion is similarly
determined by the middle point THO of the horizontal line TH.
[0099] As shown in FIG. 23, if each edge which is positioned
respectively in the front direction and the rear direction of a
bowl portion B is a single point, the center BO of the bowl portion
B in the horizontal direction is determined by a perpendicular line
which is assumed to be positioned at the center between a
perpendicular line BR positioned at the rear edge and a
perpendicular line BF positioned at the front edge because the bowl
portion B is formed in such a manner that the left portion and the
right portion thereof is symmetrical in a normal western-style
toilet body. Furthermore, as shown in FIG. 24, if at least one of
two edges which are positioned in the front and rear directions of
the bowl portion B is a horizontal line BH, the center BO of the
bowl portion B in the horizontal direction is similarly determined
by a perpendicular line BHO which is positioned at the middle point
of the horizontal line BH.
[0100] In the western-style flush toilet of the eighth invention,
it is preferable that an upstream side from the top edge of the
trap portion is formed by the rear wall of the bowl portion. If the
upstream side is formed by a wall which is different from the rear
wall of the bowl portion, the wall has the thickness in the front
and rear directions, and at the same time, there arises a clearance
having the thickness in the front and rear directions between the
wall and the rear wall of the bowl portion. Due to such a
dimension, the whole length of the western-style toilet body is
long in the front and rear directions. On the contrary, if the
upstream side is formed by the rear wall of the bowl portion, the
dimension like this is not generated, and the whole length of the
western-style toilet body is short in the front and rear
directions.
[0101] In this western-style flush toilet, the top edge of the trap
portion is the portion which forms the reserved water in the bowl
portion, and at the same time, it is the uppermost position of an
inner bottom surface which forms an inverted U-shaped water
channel. The top edge of the trap portion is determined as a single
point or a horizontal line on the basis of a cross-sectional form
of the trap portion which crosses the discharging direction.
[0102] In the western-style flush toilet of the eighth invention,
if the trap portion has a cylindrical portion whose inner surface
is a cylindrical surface at the upstream side from the top edge
thereof, it is preferable that a shaft center line of the
cylindrical portion is extended in such a manner that it has an
angle of not less than 45 degrees with respect to the horizontal
line. With such a constitution, it is possible to realize that the
whole length of the western-style toilet body in the front and rear
directions is shortened by the trap portion while maintaining a
water level of the reserved water.
[0103] In the western-style flush toilet of the eighth invention,
it is preferable that a downstream side from the top edge of the
trap portion is bent forwardly. If the whole length of the
western-style toilet body is short, at least a base seat portion
which conceals the trap portion can be also miniaturized. Thus, if
the base seat portion is miniaturized, the discharge opening of the
trap portion is easily close to a rear side wall face in the base
seat portion, and there exists the possibility that the discharge
opening is not preferably connected to the water discharge socket.
In this respect, as far as the downstream side from the top edge of
the trap portion is bent forwardly, even if the base seat portion
is miniaturized, the discharge opening is far from the rear side
wall face in the base seat portion, and the discharge opening is
preferably connected to the water discharge socket.
[0104] As a washing device, except the conventional water tank, it
is possible to adopt a washing device which is directly connected
to a water supply pipe such as a city water service pipe for
supplying water from the outside, and which is capable of spouting
water by opening and closing an open/close valve. In case such a
latter washing device is adopted, the effect of the eighth
invention is large. With respect to the prior party washing device,
water is once reserved and then spouted, so the device requires a
relatively large volume. Accordingly, in order to widen a narrow
toilet room, if the western-style toilet body of the eighth
invention is adopted while the device which requires a relatively
large volume is adopted, the effect of the eighth invention is
decreased. In this regard, if the latter washing device is adopted,
the prior party washing device is not required, so the effect of
the eighth invention which achieves to widen a narrow toilet room
is remarkably shown.
[0105] {Ninth Invention}
[0106] However, in the above-mentioned conventional western-style
flush toilet, the water tank such as a low tank which reserves
water once is adopted as the washing device, and simultaneously, a
siphon effect is generated by the trap portion. Accordingly, the
effect of saving water is not satisfactory.
[0107] In other words, the water tank hardly adjust an amount of
water which is spouted therefrom finely. As a result, in the
western-style flush toilet which adopts the water tank, much amount
of water is likely to be used after all in order to discharge filth
water satisfactorily.
[0108] The stepped portion of the trap portion which generates a
siphon effect is a part of the western-style toilet body made of
porcelain, and it is difficult to form the stepped portion with
accuracy. Due to this, in this western-style flush toilet, a large
amount of water cannot help being used for generating a siphon
effect surely.
[0109] The ninth invention has been made in view of the above
circumstances and it is the ninth task to be solved to provide a
western-style flush toilet which can discharge filth water by a
small amount of water satisfactorily.
[0110] With respect to the western-style flush toilet of the ninth
invention, in a western-style flush toilet including a
western-style toilet body comprising a bowl portion and a trap
portion which is connected to a lower edge of the bowl portion,
wherein the bowl portion is washed by water,
[0111] the improvement is characterized in that a washing device
which is directly connected to a city water service pipe for
supplying water from the outside and which is capable of spouting
water under the city water pressure by opening and closing an
open/close valve is provided, a water discharge socket made of
resin which has an orifice for generating a siphon effect inside
thereof is provided at a water discharge opening of the trap
portion, and the water discharge socket is connected to a water
discharge pipe which is protruded from a floor surface.
[0112] In the western-style flush toilet of the ninth invention,
the washing device is directly connected to the city water service
pipe for supplying water from the outside, and it is capable of
spouting water under the city water pressure by opening and closing
the open/close valve. So, the washing device is different from the
conventional water tank such as a low tank which reserves water
once, and it easily adjust an amount of water which is spouted
therefrom finely by opening and closing the open/close valve. Due
to this, in the western-style flush toilet which adopts such a
washing device, it is possible to spout the smallest amount of
water which is enough to discharge filth satisfactorily.
[0113] Furthermore, in the western-style flush toilet of the ninth
invention, since the water discharge socket made of resin is
adopted, the orifice can be formed accurately and easily. Due to
this, in the western-style flush toilet which adopts the water
discharge socket made of resin, even if the smallest amount of
water is used, a siphon effect can be surely generated.
BRIEF DESCRIPTION OF DRAWINGS
[0114] FIG. 1 is a cross-sectional view of a western-style flush
toilet of an embodiment 1 in the first and second inventions.
[0115] FIG. 2 is a cross-sectional view of a western-style flush
toilet of an embodiment 2 in the first and second inventions.
[0116] FIG. 3 is a cross-sectional view in an enlarge form of an
essential portion of a western-style flush toilet of an embodiment
3 in the first and second inventions.
[0117] FIG. 4 is a longitudinal cross-sectional view of a
western-style flush toilet of an embodiment 1 in the third and
fourth inventions.
[0118] FIG. 5 is a plan view of a western-style flush toilet of an
embodiment 1 in the third and fourth inventions.
[0119] FIG. 6 is a horizontal cross-sectional view of a
western-style flush toilet of an embodiment 1 in the third and
fourth inventions.
[0120] FIG. 7 is a longitudinal cross-sectional view of an
essential portion of a western-style flush toilet of an embodiment
1 in the third and fourth inventions.
[0121] FIG. 8 is a horizontal cross-sectional view of a
western-style flush toilet of an embodiment 2 in the third and
fourth inventions.
[0122] FIG. 9 is a longitudinal cross-sectional view of an
essential portion of a western-style flush toilet of an embodiment
3 in the third and fourth inventions.
[0123] FIG. 10 is a plan view of a western-style flush toilet of an
embodiment 1 in the fifth invention.
[0124] FIG. 11 is across-sectional view of a western-style flush
toilet of an embodiment 1 in the fifth invention.
[0125] FIG. 12 is a cross-sectional view in an enlarge form of a
stepped portion and the like at the position I in FIG. 10 according
to an embodiment 1 in the fifth invention.
[0126] FIG. 13 is a cross-sectional view in an enlarge form of a
stepped portion and the like at the position II in FIG. 10
according to an embodiment 1 in the fifth invention.
[0127] FIG. 14 is a cross-sectional view in an enlarge form of a
stepped portion and the like at the position III in FIG. 10
according to an embodiment 1 in the fifth invention.
[0128] FIG. 15 is a plan view of a western-style flush toilet of an
embodiment 2 in the fifth invention.
[0129] FIG. 16 is a cross-sectional view of a western-style flush
toilet of an embodiment 1 in the sixth invention.
[0130] FIG. 17 is a cross-sectional view of a western-style flush
toilet of an embodiment 2 in the sixth invention.
[0131] FIG. 18 is a longitudinal cross-sectional view of a
western-style flush toilet of an embodiment 1 in the seventh
invention.
[0132] FIG. 19 is a longitudinal cross-sectional view of a
western-style flush toilet of an embodiment 2 in the seventh
invention.
[0133] FIG. 20 is a longitudinal cross-sectional view of a
western-style flush toilet of an embodiment 3 in the seventh
invention.
[0134] FIG. 21 is a top view of an inlet port of a trap portion
according to the eighth invention.
[0135] FIG. 22 is a top view of an inlet port of other trap portion
according to the eighth invention.
[0136] FIG. 23 is a top view of a bowl portion according to the
eighth invention.
[0137] FIG. 24 is a top view of other bowl portion according to the
eighth invention.
[0138] FIG. 25 is a longitudinal cross-sectional view of a
western-style flush toilet of an embodiment 1 in the eighth
invention.
[0139] FIG. 26 is a longitudinal cross-sectional view of a
western-style flush toilet of an embodiment 2 in the eighth
invention.
[0140] FIG. 27 is a cross-sectional view of a western-style flush
toilet of an embodiment in the ninth invention.
[0141] FIG. 28 is a cross-sectional view of a conventional
western-style flush toilet.
[0142] FIG. 29 is a longitudinal cross-sectional view of a
conventional western-style flush toilet.
[0143] FIG. 30 is a longitudinal cross-sectional view of a
conventional western-style flush toilet.
BEST MODE FOR CARRYING OUT THE INVENTION
[0144] {First and Second Inventions}
[0145] Embodiments 1 to 3 which embody the first and second
inventions are explained hereinafter in conjunction with
drawings.
[0146] (Embodiment 1)
[0147] As shown in FIG. 1, a western-style flush toilet of the
embodiment 1 includes a western-style toilet body 1 made of
porcelain and a distributor 2 which is a part of a washing device
mounted at the rear of the western-style toilet body 1. A water
tank which constitute a part of the washing device, a toilet seat
and a toilet lid are not shown in the drawing.
[0148] The western-style toilet body 1 has a bowl portion 3 which
receives filth, a trap portion 4 which is connected to a lower edge
of the bowl portion 3 and a base seat portion 5 which conceals the
bowl portion 3 and the trap portion 4. At the rear of the
western-style toilet body 1, an installation portion 6 on which the
water tank is installed is formed, and the distributor 2 made of
resin is provided in the installation portion 6.
[0149] Besides, an open rim 8 is formed at the whole of an upper
periphery of the bowl portion 3. The open rim 8 comprises an upper
side wall portion 8a which is protruded inwardly from the upper
periphery of the bowl portion 3 in an approximately horizontal
direction and an inner side wall portion 8b which is extended from
an inner edge of the upper side wall portion 8a in an approximately
vertical direction. In the inside of the open rim 8, a stepped
portion 8c is formed in such a manner that it is protruded in
approximately parallel to the upper side wall portion 8a.
Furthermore, a rim channel 7 for guiding water which is spouted
from the distributor 2 along the stepped portion 8c is formed in
the inside of the open rim 8.
[0150] As the characterized constitution of the western-style flush
toilet, an inward surface of the inner side wall portion 8b in the
open rim 8 is an identical surface to a bowl face 3a of the bowl
portion 3 at the whole of the upper periphery of the bowl portion
3. Thus, the rim channel 7 opens at the whole periphery between the
inner side wall portion 8b and the bowl face 3a by means of an
opening 7a.
[0151] As above-mentioned, in the western-style flush toilet with
such a constitution, water which is supplied from the water tank is
spouted from the distributor 2 toward the rim channel 7, and then,
the water flows downward to the bowl portion 3 while whirling, and
after that, the water is discharged by way of the trap portion 4
while washing the bowl face 3a of the bowl portion 3.
[0152] In the western-style flush toilet, since the inward surface
of the inner side wall portion 8b is an identical surface to the
bowl face 3a, the splashed stains are hardly adhered to the rim
channel 7 such as a rear side of the upper side wall portion 8a or
a rear side of the inner sidewall portion 8b. As a result, a nasty
smell such as ammonia is hardly generated, and the person who uses
the western-style flush toilet doesn't feel uncomfortable. Besides,
the western-style flush toilet is sanitary.
[0153] Furthermore, in this western-style flush toilet, stains
adhered to the bowl portion 3 around the open rim 8 exist at the
position which a cleaning person easily sees, and it is easy for
the cleaning person to confirm whether or not the stains are
adhered or removed. In addition, since the inward surface of the
inner side wall portion 8b is an identical surface to the bowl face
3a, the stains are easily wiped out at one time. Accordingly, it is
possible for the cleaning person to carry out the cleaning
satisfactorily.
[0154] Moreover, the western-style flush toilet has the stepped
portion 8c which forms the rim channel 7 at a boundary between the
bowl portion 3 and the open rim 8. With such a constitution, water
doesn't flow downward immediately, and the water gradually flows
downward to the bowl face 3a of the bowl portion 3 while whirling
satisfactorily in the rim channel 7. As a result, it is possible to
improve the washing effect of the whole of the bowl portion 3 as
compared with the western-style flush toilet which doesn't have the
stepped portion 8c.
[0155] Therefore, in the western-style flush toilet, stains are
hardly adhered to the open rim 8. As a result, a nasty smell and
the like are hardly generated, and the person who uses the
western-style flush toilet feels comfortable. Besides, the
western-style flush toilet is sanitary. In addition, in the
western-style flush toilet, it is possible to obtain an advantage
in the manufacturing cost.
[0156] (Embodiment 2)
[0157] As shown in FIG. 2, in a western-style flush toilet of the
embodiment 2, a closed rim 10 is formed at the whole of an upper
periphery of a bowl portion 3. The closed rim 10 comprises an upper
side wall portion 10a which is protruded inwardly from the upper
periphery of the bowl portion 3 in an approximately horizontal
direction, an inner side wall portion 10b which is extended from an
inner edge of the upper side wall portion 10a in an approximately
vertical direction and a lower side wall portion 10c for connecting
a lower edge of the inner side wall portion 10b to the bowl portion
3. In the inside of the closed rim 10, the same rim channel 9 as
that of the embodiment 1 is formed.
[0158] As the characterized constitution of the western-style flush
toilet, an inward surface of the inner side wall portion 10b in the
closed rim 10 is an identical surface to a bowl face 3a of the bowl
portion 3 at the whole of the upper periphery of the bowl portion
3. In the lower side wall portion 10c, plural water spout openings
which open downward and which are not shown in the drawing are
mounted, and the rim channel 9 opens at the whole periphery between
the inner side wall portion 10b and the bowl face 3a by way of the
water spout openings by means of an opening 9a. Other constitutions
are the same as those of the embodiment 1.
[0159] As above-mentioned, in the western-style flush toilet with
such a constitution, water in the rim channel 9 is spouted to the
bowl portion 3 by way of the water spout openings and the opening
9a. Besides, stains are hardly adhered to the inside of the rim
channel 9 through a front side of the lower side wall portion 10c
or the water spout openings.
[0160] Furthermore, in this western-style flush toilet, although
there is a disadvantage in the manufacturing cost, an amount of
water which is spouted to the bowl portion 3 is easily adjusted by
the water spout openings. So, it is possible to improve the washing
ability of the whole of the bowl portion 3. Other operations and
effects are the same as those of the embodiment 1.
[0161] (Embodiment 3)
[0162] As shown in FIG. 3, in a western-style flush toilet of the
embodiment 3, a western-style toilet body 1 has an open rim 18 in
which an inner side wall portion 18b is formed at the further
outside as compared with the western-style flush toilet of the
embodiment 1. Accordingly, the inward surface of the inner side
wall portion 18b is positioned outwardly with respect to a bowl
face 3a of a bowl portion 3. Other constitutions are the same as
those of the embodiment 1.
[0163] As above-mentioned, in the western-style flush toilet with
such a constitution, an inward surface of the inner side wall
portion 18b is positioned outwardly with respect to the bowl face
3a of the bowl portion 3, so the ease of wiping out the stains is
somewhat inferior as compared with the western-style flush toilet
of the first embodiment or the second embodiment. However, other
operations and effects are the same as those of the first and
second embodiments.
[0164] {Third and Fourth Inventions}
[0165] Embodiments 1 to 3 which embody the third and fourth
inventions are explained hereinafter in conjunction with
drawings.
[0166] (Embodiment 1)
[0167] As shown in FIG. 4, a western-style flush toilet of the
embodiment 1 includes a western-style toilet body 1 made of
porcelain and a washing device 2 which is directly connected to a
city water service pipe not shown in the drawing for supplying
water from the outside, and in which a valve is stored. A toilet
seat and a toilet lid are not shown in the drawing.
[0168] The western-style toilet body 1, as also shown in FIG. 5,
has a bowl portion 3 which receives filth, a rim 4 which is formed
at the whole of an upper periphery of the bowl portion 3 and which
has a rim channel 4a capable of flowing water downward to the bowl
portion 3 in the inside thereof and, as shown in FIG. 4, a trap
portion 5 which is connected to a lower edge of the bowl portion 3.
A nozzle opening 5a is mounted in a bottom portion as a primary
side of the trap portion 5. At the rear of the rim 4, an
installation portion 6 which is extended in flat is formed, and the
bowl portion 3 and the trap portion 5 are concealed by a base seat
portion 7 which is extended downward from the rim 4 and the
installation portion 6. As shown in FIGS. 4 and 5, at the center of
a rear side of the base seat portion 7, an opening 7a which passes
through the inside is formed.
[0169] As shown in FIG. 4, a jet pipe 8 is connected to the washing
device 2, and the jet pipe 8 is extended in the inside of the base
seat portion 7 by way of the opening 7a. Besides, as shown in FIG.
7, at the outside of the opening 7a, a sealing material 13 which
seals the jet pipe 8 is formed. The jet pipe 8 is connected to a
jet nozzle 9 which is fixed to the nozzle opening 5a. A jet opening
9a of the jet nozzle 9 is formed in such a manner that water which
is supplied from the washing device 2 is spouted along the trap
portion 5.
[0170] Further, at the rear side of the rim channel 4a, a rim pipe
10 which is connected to the washing device 2 is stored, and the
rim pipe 10 is formed in such a manner that water which is supplied
from the washing device 2 is spouted to the inside of the rim
channel 4a. Besides, at a discharge opening 5b as a secondary side
of the trap portion 5, a discharge socket 11 for connecting the
discharge opening 5b and a discharge pipe which is disposed under a
floor of a toilet room and which is not shown in the drawing is
formed.
[0171] In this western-style flush toilet, as the characterized
constitution, the bottom portion of the bowl portion 3 and the
primary side of the trap portion 5 in the western-style toilet body
1 are surrounded by a heater 12 having faces. As shown in FIG. 6,
the jet pipe 8 is adjacent to the heater 12. A code of the heater
12 not shown in the drawing is inserted into other opening which is
mounted in the base seat portion 7 of the western-style toilet body
1 and which is not shown in the drawing, and a sealing material
which seals the code and which is not shown in the drawing is
mounted at the outside of the opening.
[0172] Moreover, as shown in FIGS. 4 and 6, in order to surround
the trap portion 5 and the jet pipe 8, an anticondensation material
13 having faces is formed below the heater 12 in such a manner that
the periphery is fixed to an inner surface of the base seat portion
7 and the discharge opening 5b of the trap portion 5 is
exposed.
[0173] As above-mentioned, in the western-style flush toilet with
such a constitution, since the jet pipe 8 is also heated by the
heater 12 which heats the trap portion 5, water in the jet pipe 8
can be prevented from being freezing even if the western-style
flush toilet is used in a cold area. Accordingly, it is possible to
realize the reduction of the running cost by saving water,
simultaneously with the keeping of the condition that the
western-style flush toilet can be used during the cold season and
the prevention of the western-style flush toilet from being
damaged. Besides, a unique heater for the jet pipe 8 is
unnecessary, and the reduction of the manufacturing cost can be
realized.
[0174] Therefore, in the western-style flush toilet, it is possible
to realize the reduction of the manufacturing cost and the running
cost, simultaneously with the keeping of the condition that the
western-style flush toilet can be used during the cold season and
the prevention of the western-style flush toilet from being
damaged. Besides, the opening 7a is mounted in the position which
is likely to be seen from the upper part, so an assembling of the
western-style flush toilet is improved.
[0175] In addition, in this western-style flush toilet, the opening
7a which is mounted in the western-style toilet body 1 is sealed.
As a result, fresh air containing moisture is not intruded into the
inside of the base seat portion 7 including the trap portion 5 and
the jet pipe 8 through the opening 7a, and the anticondensation
effect is excellent. Then, the jet pipe 8 is prevented from a dew
drop by means of the anticondensation material 13 which prevents
the trap portion 5 from a dew drop. Accordingly, a unique
anticondensation material for the jet pipe 8 is unnecessary, and
the reduction of the manufacturing cost can be realized.
[0176] (Embodiment 2)
[0177] As shown in FIG. 8, in a western-style flush toilet of the
embodiment 2, a bottom portion of a bowl portion 3, a primary side
of a trap portion 5 and a jet pipe 8 in a western-style toilet body
1 are surrounded by a heater 15 having faces. Other constitutions
are the same as those of the embodiment 1.
[0178] In this western-style flush toilet, the same operations and
effects as those of the embodiment 1 can be obtained.
[0179] (Embodiment 3)
[0180] As shown in FIG. 9, in a western-style flush toilet of the
embodiment 3, a code 12a of a heater 12 together with a jet pipe 8
is inserted into an opening 7a. At the outside of the opening 7a, a
sealing material 16 which seals the jet pipe 8 and the code 12a is
formed. Other constitutions are the same as those of the embodiment
1 or the embodiment 2.
[0181] In this western-style flush toilet, the opening 7a into
which the code 12a is inserted should not be separately formed in
the western-style toilet body 1 so that it becomes easy to
manufacture the western-style toilet body 1. As a result, it is
possible to realize the reduction of the manufacturing cost, and
furthermore, a favorable appearance is obtained. Other operations
and effects are the same as those of the embodiment 1 or the
embodiment 2.
[0182] {Fifth Invention}
[0183] Embodiments 1 and 2 which embody the fifth invention are
explained hereinafter in conjunction with drawings.
[0184] (Embodiment 1)
[0185] As shown in FIGS. 10 and 11, a western-style flush toilet of
the embodiment 1 includes a western-style toilet body 5 made of
porcelain and a washing device which is mounted on the
western-style toilet body 5. A toilet seat and a toilet lid are not
shown in the drawing.
[0186] The western-style toilet body 5 has a bowl portion 1 which
receives filth, an open rim 2 which is formed at the whole of an
upper periphery of the bowl portion 1 and a trap portion 3 which is
connected to a lower edge of the bowl portion 1.
[0187] At the rear of the western-style toilet body 5, a water tank
which is a part of the washing device and which is not shown in the
drawing is mounted, and the water tank is connected to a city water
service pipe which is capable of supplying water by way of a pipe
not shown in the drawing. Below the water tank, a hose 8 which is
extended to the right side of the western-style toilet body 5 as
you face it is formed as a part of the washing device.
[0188] At a boundary between the bowl portion 1 and the open rim 2,
a stepped portion 6 which is protruded inwardly is formed, and a
rim channel 4 is formed by the stepped portion 6 in the inside of
the open rim 2. The rim channel 4 is exposed to the bowl portion 1,
and water is spouted to the bowl portion 1 by way of an opening 4a
which is formed by an inner side wall portion of the open rim 2 and
the bowl portion 1. A top end of the hose 8 is positioned in the
inside of the rim channel 4.
[0189] As shown in FIGS. 12 to 14, an upper surface of the stepped
portion 6 is formed by an inward inclined surface 6a which is
inclined inwardly and an outward inclined surface 6b which is
inclined outwardly. As shown in FIGS. 11 and 12, at an upstream
side of water which is spouted from the hose 8, the inward inclined
surface 6a has a small area, and the outward inclined surface 6b
has a large area. As shown in FIGS. 10 and 13, toward a downstream
side of the water which is spouted from the hose 8, the inward
inclined surface 6a has almost the same area as that of the outward
inclined surface 6b. Then, as shown in FIGS. 10 and 14, at a
further downstream side of the water which is spouted from the hose
8, the inward inclined surface 6a has a large area, and the outward
inclined surface 6b has a small area. At the most downstream side,
only the inward inclined surface 6a is formed.
[0190] Furthermore, as shown in FIGS. 10 and 11, the western-style
toilet body 5 has a circular arc-shaped partition wall 7 by which
the rim channel 4 is separated from the rear side.
[0191] As above-described, in the western-style flush toilet with
such a constitution, when the person who uses the toilet inputs a
washing switch, water is spouted from the water tank to the rim
channel 4 by way of the hose 8. At this time, since the hose 8 is
provided only at the right side of the western-style toilet body 5
as you face it, the water which is spouted from the water tank
gradually flows downward to the bowl portion 1 while being guided
in the right direction. Then, the water whirls in the bowl portion
1. After that, the water together with filth is discharged by way
of the trap portion 3.
[0192] Thus, in this western-style flush toilet, the hose 8 is
provided only at one side, so the water doesn't come into collision
in the rim channel 4 and/or at the front side of the bowl portion
1. As a result, a noise is not generated. Besides, in the
western-style flush toilet, the rim channel 4 in the open rim 2 is
exposed to the bowl portion 1. Accordingly, when the washing
begins, water and air are not mixed, and the water is spouted from
the opening 4a which is broader than the water spout opening of the
closed rim. At this time, a noise is not generated. Therefore, this
western-style flush toilet is excellent in the quietness.
[0193] In such a western-style flush toilet, the collision of the
water at the front side of the bowl portion 1 is not generated, so
water is not splashed, and there is no possibility that a floor
surface gets wet. Accordingly, the person who uses the
western-style flush toilet doesn't feel uncomfortable. Furthermore,
in the western-style flush toilet, by strengthening water force,
the washing ability of the bowl portion 1 can be ensured. In
addition, the water whirls in one direction (one-way whirling) at
the bowl portion 1 to be discharged, so the filth discharging
ability is also excellent.
[0194] Especially, in this western-style flush toilet, the upper
surface of the stepped portion 6 is formed in the above-mentioned
manner, so the water which is spouted from the hose 8 doesn't flow
downward to the bowl portion 1 immediately at the upstream side of
the rim channel 4. Namely, the water is guided to the most
downstream side, and it flows downward to the bowl portion 1. So,
the washing of the bowl portion 1 can be carried out
satisfactorily. Besides, due to this, the water easily whirls in
the bowl portion 1, and the filth discharging ability can be
improved. In addition, since the water is guided only to the bowl
portion 1 at the most downstream side, the water is not circulated
again, and it doesn't remain in the rim channel. Therefore, water
is not used in vain, and the effect of saving water is large.
[0195] Furthermore, in the western-style flush toilet, since the
western-style toilet body 5 has the partition wall 7, water is
never guided to the rear side. Accordingly, water is not used in
vain, and the effect of saving water is large.
[0196] Moreover, the western-style flush toilet has no water spout
openings, so the constitution of the open rim 2 is simple. As a
result, the number of the manufacturing process is limited, and
accordingly, the reduction of the manufacturing cost can be
realized.
[0197] Therefore, the western-style flush toilet is excellent in
the quietness, and there is no possibility that the floor surface
gets wet. In addition, the western-style flush toilet is excellent
in the washing ability of the bowl portion 1 and the filth
discharging ability. Simultaneously, the western-style flush toilet
can realize the reduction of the manufacturing cost.
[0198] (Embodiment 2)
[0199] As shown in FIG. 15, in a western-style flush toilet of the
embodiment 2, a washing device 10 which is directly connected to a
city water service pipe is formed instead of the washing device in
the embodiment 1. The washing device 10 has a device body 10a which
is formed at a rear upper portion of a western-style toilet body 11
and which is directly connected to the city water service pipe, a
pipe 10b which is connected to the device body 10a and which is
extended in the left side of the western-style toilet body 11 as
you face it and a nozzle 10c which is formed at a top end of the
pipe 10b and which is protruded into the inside of a rim channel 4.
In the inside of the device body 10a, a valve not shown in the
drawing for opening and closing a passage which is connected to the
pipe 10b is stored. Other constitutions are the same as those of
the embodiment 1.
[0200] As above-mentioned, in the western-style flush toilet with
such a constitution, when the person who uses the toilet inputs a
washing switch, water in the city water service pipe is spouted
from the pipe 10b by the nozzle 10c to the rim channel 4 by way of
the device body 10a of the washing device 10. At this time, water
force is strengthened by the nozzle 10c, so the water flows
downward to a bowl portion 1 while being guided in the rim channel
4 with strong water force, and then whirls. Accordingly, the
washing ability of the bowl portion 1 can be improved. Other
operations and effects are the same as those of the embodiment
1.
[0201] {Sixth Invention}
[0202] Embodiments 1 and 2 which embody the sixth invention are
explained hereinafter in conjunction with drawings.
[0203] (Embodiment 1)
[0204] As shown in FIG. 16, a western-style flush toilet of the
embodiment 1 includes a bowl portion 1 which has a bowl face 1a by
means of a western-style toilet body 10 made of porcelain and a
trap portion 2 which is connected to a bottom portion of the bowl
portion 1. The uppermost portion of the trap portion 2 is a
reflecting surface 2a which is constituted by an approximately flat
surface, and the reflecting surface 2a is connected downward to a
water discharge opening 2b. The water discharge opening 2b is
connected to a water discharge pipe not shown in the drawing by way
of a water discharge socket 7. A toilet seat and a toilet lid are
not shown in the drawing.
[0205] Furthermore, a nozzle opening 3 is mounted in a bottom
portion of a reserved water portion of the trap portion 2 which
ensures reserved water. At the nozzle opening 3, a jet nozzle 9
which is connected to a jet pipe 8 is fixed. A top end of the jet
nozzle 9 which is in the inside of the trap portion 2 is a jet
opening 9a. Besides, a rim 4 which has a rim channel 4a in the
inside thereof is formed at the whole of an upper periphery of the
bowl portion 1. At a rear upper portion of the bowl portion 1, a
rim pipe 5 whose top end opens toward the inside of the rim channel
4a is formed. The jet pipe 8 and the rim pipe 5 are connected to a
washing device 6 in which two valves not shown in the drawing are
stored, and the washing device 6 is directly connected to a city
water service pipe which is not shown in the drawing.
[0206] In this western-style flush toilet, when the person who uses
the toilet pushes a water discharge button switch of a body or a
remote control not shown in the drawing, first of all, the washing
device 6 opens one of two valves, and water flows toward only the
rim channel 4a by way of the rim pipe 5. Due to this, the water
flows out from plural water spout openings which are mounted at a
lower edge of the rim 4 and which is not shown in the drawing, and
the bowl face 1a of the bowl portion 1 is washed. Then, the washing
device 6 closes the one of two valves.
[0207] Secondly, the washing device 6 opens the other of two
valves, and water flows toward only the jet nozzle 9 by way of the
jet pipe 8. Due to this, the water is spouted from the jet opening
9a toward the spouting direction D1 in the trap portion 2. The
water which is spouted from the jet opening 9a forcibly generates a
siphon effect. So, the water containing filth is discharged to a
discharge pipe by way of a water discharge socket 7.
[0208] At this time, the water which is spouted from the jet
opening 9a toward the spouting direction D1 is reflected toward the
central direction D2 of the water discharge opening 2b by means of
the reflecting surface 2a. Accordingly, the reflected water is
discharged to the water discharge opening 2b without being collided
with a wall face at the downstream side from the reflecting surface
2a, and there is little possibility that the reflected water comes
into collision. Especially, in this western-style flush toilet, the
central direction D2 is the vertical direction, so the discharging
speed of the reflected water is increased by the gravity. Besides,
in this western-style flush toilet, at the point where the water is
collided with the reflecting surface 2a, an angle A1 which is
obtained by an imaginary line P vertical to the reflecting surface
2a and the spouting direction D1 of the water is equal to an angle
A2 which is obtained by the imaginary line P and the central
direction D2 of the water discharge opening 2b. Accordingly, the
water which is spouted from the jet opening 9a is guided to the
central direction D2 of the water discharge opening 2b with the
water being reflected by the reflecting surface 2a only one time,
so the water reaches the water discharge opening 2b with
maintaining its force. Due to this, the water discharging ability
is improved, and a siphon effect is strengthened. Then, the washing
device 6 closes the other of two valves.
[0209] Finally, the washing device 6 opens the one of two valves
again, and water flows toward only the rim channel 4a by way of the
rim pipe 5. Due to this, the water flows out from plural water
spout openings which are mounted at the lower edge of the rim 4,
and water is reserved at the lower side of the bowl portion 1 and
the reserved water portion of the trap portion 2. Then, the washing
device 6 closes the one of two valves to complete the whole
operations.
[0210] Therefore, in the western-style flush toilet of the
embodiment 1, the water can be used no uselessly and efficiently,
and the discharge of filth can be performed even by a small amount
of water.
[0211] (Embodiment 2)
[0212] As shown in FIG. 17, in a western-style flush toilet of the
embodiment 2, at a bottom portion of a reserved water portion of a
trap portion 2 which ensures the reserved water, a reserved portion
2f which reserves a slurry as in a small amount as possible at the
time of casting a sludge is formed. Besides, a lower side wall face
2c which is connected to the reserved portion 2f and which is
extended in parallel to the spouting direction D1 of the water
spouted from a jet opening 9a is formed. With respect to the same
constitutions as those of the western-style flush toilet of the
embodiment 1 shown in FIG. 16, the same symbols as those of FIG. 16
are used, and explanations thereof are omitted. As for a toilet
seat and a toilet lid, they are not shown in the drawing, in the
same way as FIG. 16.
[0213] In this western-style flush toilet, when the person who uses
the toilet pushes a water discharge button switch of a body or a
remote control not shown in the drawing, first of all, a washing
device 6 opens one of two valves, and water flows toward only a rim
channel 4a by way of a rim pipe 5. Due to this, the water is
spouted from plural water spout openings which are mounted at a
lower edge of a rim 4 and which is not shown in the drawing, and a
bowl face 1a of a bowl portion 1 is washed. Then, the washing
device 6 closes the one of two valves.
[0214] Secondly, the washing device 6 opens the other of two
valves, and water flows toward only a jet nozzle 9 by way of a jet
pipe 8. Due to this, the water is spouted from the jet opening 9a
toward the spouting direction D1 in the trap portion 2. The water
which is spouted from the jet opening 9a forcibly generates a
siphon effect. So, the water containing filth is discharged to a
discharge pipe by way of a water discharge socket 7.
[0215] At this time, the water is not spouted along a center line
of the trap portion 2, and it is spouted along the line which is
close to the lower side wall face 2c by the center line.
Especially, in this western-style flush toilet, the reserved
portion 2f reserves the slurry as in a small amount as possible at
the time of casting a sludge, and the lower side wall face 2c of
the trap portion 2 is extended in parallel to the spouting
direction D1 of the water spouted from the jet opening 9a. Due to
this, the water is spouted in parallel near the lower side wall
face 2c. Accordingly, the sediment which may remain on the lower
side wall face 2c is discharged without remaining in the trap
portion 2, and filth can be surely discharged.
[0216] Finally, the washing device 6 opens the one of two valves
again, and water flows toward only the rim channel 4a by way of the
rim pipe 5. Due to this, the water is spouted from plural water
spout openings which are mounted at the lower edge of the rim 4,
and water is reserved at the lower side of the bowl portion 1 and
the reserved water portion of the trap portion 2. Then, the washing
device 6 closes the one of two valves to complete the whole
operations.
[0217] Therefore, in the western-style flush toilet of the
embodiment 1, the water can be used no uselessly and efficiently,
and the discharge of filth can be performed even by a small amount
of water. Other operations and effects are the same as those of the
embodiment 1.
[0218] {Seventh Invention}
[0219] Embodiments 1 to 3 which embody the seventh invention are
explained hereinafter in conjunction with drawings.
[0220] (Embodiment 1)
[0221] As shown in FIG. 18, a western-style flush toilet of the
embodiment 1 includes a western-style toilet body 11 made of
porcelain and a washing device 12 which is directly connected to a
water supply pipe not shown in the drawing for supplying water from
the outside, and in which water is spouted by opening and closing a
valve not shown in the drawing to supply the water to the
western-style toilet body 11.
[0222] The western-style toilet body 11 has a bowl portion 13, a
rim 14 which is formed at the whole of an upper periphery of the
bowl portion 13 and which has a rim channel 14a capable of flowing
water downward to the bowl portion 13 in the inside thereof and a
trap portion 15 which is connected to a lower edge of the bowl
portion 13.
[0223] At the rear of the rim channel 14a, the washing device 12
and a rim pipe 20 are mounted. Besides, the trap portion 15 has a
reserved water portion 15a for reserving water in the inside of the
bowl portion 13 by means of a top edge 15d. The top edge 15d of the
trap portion 15 is determined as a single point or a horizontal
line on the basis of a cross-sectional form of the trap portion 15
which crosses the discharging direction. A nozzle opening 15b is
mounted in the bottom of the reserved water portion 15a, and a jet
nozzle 19 which is connected to the washing device 12 by way of the
jet pipe 18 is mounted at the nozzle opening 15b. A jet opening 19a
of the jet nozzle 19 points to the top edge 15d.
[0224] Furthermore, a rear edge 13a of the bowl portion 13 is
positioned at the most rear side portion of a boundary between the
bowl portion 13 and the rim 14. Besides, at the rear of the bowl
portion 13 and the rim 14, a pair of toilet seat mounting holes 16
for mounting a toilet seat, a toilet seat having a heating
function, a toilet seat having a part washing function and the
like, all of which are not shown in the drawing, is formed. In this
western-style flush toilet, the top edge 15d is positioned in front
of each of toilet seat mounting holes 16, and further, it is
positioned in front of the rear edge 13a of the bowl portion
13.
[0225] A water discharge socket 17 which extends upward and
downward is connected to a discharge opening 15c at a downstream
side from the top edge 15d of the trap portion 15. The water
discharge socket 17 is connected to a water discharge pipe which is
protruded from a floor surface and which is not shown in the
drawing.
[0226] In the western-style flush toilet with such a constitution,
water is supplied from the washing device 12 to the rim channel 14a
by way of a rim pipe 20, and then, the water flows downward to the
bowl portion 13. Besides, the water which is supplied from the
washing device 12 is spouted from the jet opening 19a by way of the
jet pipe 18 and the jet nozzle 19, and this forcibly generates a
siphon effect. Due to this, the water together with filth is
discharged to the rear side along the trap portion 15, and then, it
is discharged to a water discharge pipe by way of the water
discharge socket 17.
[0227] Thus, in this western-style flush toilet, the top edge 15d
is positioned in front of each of toilet seat mounting holes 16,
and further, it is positioned in front of the rear edge 13a of the
bowl portion 13. Accordingly, the whole length of the western-style
toilet body 11 is short. Besides, the western-style flush toilet
has no water tank which reserves water once, so the whole length of
the western-style toilet body 11 is further short.
[0228] Accordingly, the western-style flush toilet as a whole is
miniaturized, so the saving of spaces in a toilet room can be
achieved. Even in the toilet room which cannot ensure a relatively
large space, the person who uses the toilet feels a wide space.
Besides, in this western-style flush toilet, the person who uses
the toilet easily moves in the toilet room, and it is possible to
utilize extra spaces for others. Furthermore, since the
western-style flush toilet is miniaturized, the saving of materials
for manufacturing the western-style flush toilet and the reduction
of the cost can be realized.
[0229] (Embodiment 2)
[0230] As shown in FIG. 19, in a western-style flush toilet of the
embodiment 2, a rear wall 15e of a trap portion 15 and a rear edge
13a of a bowl portion 13 are existed at the same position in the
vertical direction. Due to this, a top edge 15d is positioned in
front of each of toilet seat mounting holes 16, and furthermore, it
is positioned in front of the rear edge 13a of the bowl portion 13.
Other constitutions are the same as those of the embodiment 1.
[0231] In such a western-style flush toilet, the whole length of a
western-style toilet body 11 is further short, so the effect of
this invention can be further shown. Other operations and effects
are the same as those of the embodiment 1.
[0232] Moreover, if the rear wall 15e of the trap portion 15 is
positioned in front of the rear edge 13a of the bowl portion 13,
the effect of this invention can be remarkably shown.
[0233] (Embodiment 3)
[0234] As shown in FIG. 20, in a western-style flush toilet of the
embodiment 3, a trap portion 15 is bent forwardly at a downstream
side 15f from a top edge 15d. Other constitutions are the same as
those of the embodiment 1.
[0235] In such a western-style flush toilet, even if a base seat
portion 21 which conceals the trap portion 15 is miniaturized for
miniaturizing a western-style toilet body 11, a discharge opening
15c is far from a rear side wall face in the base seat portion 21,
and the discharge opening 15c is preferably connected to a water
discharge socket 17. Other operations and effects are the same as
those of the embodiment 1.
[0236] {Eighth Invention}
[0237] Embodiments 1 and 2 which embody the eighth invention are
explained hereinafter in conjunction with drawings.
[0238] (Embodiment 1)
[0239] As shown in FIG. 25, a western-style flush toilet of the
embodiment 1 includes a western-style toilet body 11 made of
porcelain and a washing device 12 which is directly connected to a
water supply pipe not shown in the drawing for supplying water from
the outside, and in which water is spouted by opening and closing a
valve not shown in the drawing to supply the water to the
western-style toilet body 11. A toilet seat and a toilet lid are
not shown in the drawing.
[0240] The western-style toilet body 11 has a bowl portion 13, a
rim 14 which is formed at the whole of an upper periphery of the
bowl portion 13 and which has a rim channel 14a capable of flowing
water downward to the bowl portion 13 in the inside thereof and a
trap portion 15 which is connected to a lower edge of the bowl
portion 13.
[0241] At the rear of the rim channel 14a, a rim pipe 20 which is
connected to the washing device 12 is mounted. Besides, the trap
portion 15 has a reserved water portion 15a for reserving water in
the inside of the bowl portion 13 by means of a top edge 15d. The
top edge 15d of the trap portion 15 is determined as a single point
or a horizontal line on the basis of a cross-sectional form of the
trap portion 15 which crosses the discharging direction. A nozzle
opening 15b is mounted in the bottom of the reserved water portion
15a, and a jet nozzle 19 which is connected to the washing device
12 by way of the jet pipe 18 is mounted at the nozzle opening 15b.
A jet opening 19a of the jet nozzle 19 points to the top edge
15d.
[0242] Besides, the center TO of an inlet port TI of the trap
portion 15 is positioned in front of the center BO of the bowl
portion 13. Here, the inlet port TI of the trap portion 15 is the
portion which ranges from the bowl portion 13 to the trap portion
15, and it is extended in the horizontal direction. The portion
which ranges from the bowl portion 13 to the trap portion 15 is
determined by a lower edge 13d (TR) of a rear wall 13b of the bowl
portion 13. The center TO of the inlet port TI is the middle point
of a line segment TL which connects the lower edge 13d (TR) and the
front edge TF of the inlet port TI.
[0243] Furthermore, the center BO of the bowl portion 13 in the
horizontal direction is determined by a perpendicular line which is
assumed to be positioned at the center between a perpendicular line
BR positioned at a rear edge 13r of the bowl portion 13 and a
perpendicular line BF positioned at a front edge 13f of the bowl
portion 13. Here, the rear edge 13r of the bowl portion 13 is the
most rear side portion of a boundary between the bowl portion 13
and the rim 14, and the front edge 13f of the bowl portion 13 is
the most front side portion of the boundary between the bowl
portion 13 and the rim 14.
[0244] Moreover, the trap portion 15 has a cylindrical portion 15h
whose inner surface is a cylindrical surface at an upstream side
from the top edge 15d. A shaft center line 15g of the cylindrical
portion 15h is extended in such a manner that it has an angle
.theta. (.theta.=45 degrees) with respect to the horizontal
direction.
[0245] A water discharge socket 17 which extends upward and
downward is connected to a discharge opening 15c at a downstream
side from the top edge 15d of the trap portion 15. The water
discharge socket 17 is connected to a water discharge pipe which is
protruded from a floor surface and which is not shown in the
drawing.
[0246] In the western-style flush toilet with such a constitution,
water is supplied from the washing device 12 to the rim channel 14a
by way of a rim pipe 20, and then, the water flows downward to the
bowl portion 13. Besides, the water which is supplied from the
washing device 12 is spouted from the jet opening 19a by way of the
jet pipe 18 and the jet nozzle 19, and this forcibly generates a
siphon effect. Due to this, the water together with filth is
discharged to the rear side along the trap portion 15, and then, it
is discharged to a water discharge pipe by way of the water
discharge socket 17.
[0247] Thus, in this western-style flush toilet, the center TO of
the inlet port TI which is extended in the horizontal direction of
the trap portion 15 is positioned in front of the center BO of the
bowl portion 13 in the horizontal direction. Accordingly, the whole
length of the western-style toilet body 11 is short. Besides, the
shaft center line 15g of the cylindrical portion 15h of the trap
portion 15 is extended in such a manner that it has an angle of 45
degrees with respect to the horizontal line. So, the whole length
of the western-style toilet body 11 in the front and rear
directions is shortened by the trap portion 15 while maintaining a
water level of the reserved water. Furthermore, the western-style
flush toilet has no water tank which reserves water once, so the
whole length of the western-style toilet body 11 is especially
short.
[0248] Accordingly, the western-style flush toilet as a whole is
miniaturized, so the saving of spaces in a toilet room can be
achieved. Even in the toilet room which cannot ensure a relatively
large space, the person who uses the toilet feels a wide space.
Besides, in this western-style flush toilet, the person who uses
the toilet easily moves in the toilet room, and it is possible to
utilize extra spaces for others. Furthermore, since the
western-style flush toilet is miniaturized, the saving of materials
for manufacturing the western-style flush toilet and the reduction
of the cost can be realized.
[0249] (Embodiment 2)
[0250] As shown in FIG. 26, in a western-style flush toilet of the
embodiment 2, a downstream side 15i from a top edge 15d of a trap
portion 15 is bent forwardly. Other constitutions are the same as
those of the embodiment 1.
[0251] In such a western-style flush toilet, even if a base seat
portion 21 which conceals the trap portion 15 is miniaturized for
miniaturizing a western-style toilet body 11, a discharge opening
15c is far from a rear side wall face in the base seat portion 21,
and the discharge opening 15c is preferably connected to a water
discharge socket 17. Other operations and effects are the same as
those of the embodiment 1.
[0252] {Ninth Invention}
[0253] Embodiment which embodies the ninth invention is explained
hereinafter in conjunction with the drawing.
[0254] (Embodiment)
[0255] As shown in FIG. 27, a western-style flush toilet of the
embodiment includes a western-style toilet body 10 made of
porcelain and a washing device 6 in which two valves not shown in
the drawing are stored. A toilet seat and a toilet lid are not
shown in the drawing.
[0256] The western-style toilet body 10 includes a bowl portion 1
which has a bowl face 1a and a trap portion 2 which is connected to
a bottom portion of the bowl portion 1. The uppermost portion of
the trap portion 2 is a reflecting surface 2a which is constituted
by an approximately flat surface, and the reflecting surface 2a is
connected downward to a water discharge opening 2b.
[0257] The water discharge opening 2b of the western-style toilet
body 10 is connected to a water discharge pipe 7 which is protruded
from a floor surface 15 by way of a water discharge socket 11 made
of resin. The water discharge socket 11 is constituted by a water
discharge socket body 12 which is made of resin and which is formed
integrally with the water discharge socket 11, a cap 13 which is
made of resin and which has an orifice 13a at a bottom surface
thereof and a packing 14 made of rubber. The water discharge socket
body 12 and the floor surface 15 are fixed by a screw 16. The
western-style toilet body 10 and the water discharge socket body 12
are fixed by a screw 17.
[0258] Furthermore, a nozzle opening 3 is mounted in a bottom
portion of a reserved water portion of the trap portion 2. At the
nozzle opening 3, a jet nozzle 9 which is connected to the washing
device 6 by way of a jet pipe 8 is fixed. A top end of the jet
nozzle 9 which is in the inside of the trap portion 2 is a jet
opening 9a. Besides, a rim 4 which has a rim channel 4a in the
inside thereof is formed at an upper portion of the bowl portion 1.
At a rear upper portion of the bowl portion 1, a rim pipe 5 which
is connected to the washing device 6 and whose top end opens toward
the inside of the rim channel 4a is formed. The washing device 6 is
directly connected to a city water pipe which is not shown in the
drawing.
[0259] In this western-style flush toilet, when the person who uses
the toilet pushes a water discharge button switch of a body or a
remote control not shown in the drawing, first of all, the washing
device 6 opens one of two valves, and water flows toward only the
rim channel 4a by way of the rim pipe 5. Due to this, the water
flows out from plural water spout openings which are mounted at a
lower edge of the rim 4 and which is not shown in the drawing, and
the bowl face 1a of the bowl portion 1 is washed. Then, the washing
device 6 closes the one of two valves.
[0260] Secondly, the washing device 6 opens the other of two
valves, and water flows toward only the jet nozzle 9 by way of the
jet pipe 8. Due to this, the water is spouted from the jet opening
9a in the trap portion 2. The water which is spouted from the jet
opening 9a forcibly generates a siphon effect. So, filth water
containing the water and filth is discharged to the discharge pipe
7 by way of the water discharge socket 11.
[0261] When the filth water is discharged by way of the socket 11,
the filth water is partly cut off by the orifice 13a of the cap 13,
and as a result, the turbulence is generated to form a water
screen. Because of the function of such a water screen, the trap
portion 2 is filled with the filth water, and after that, the
filled filth water is discharged to the water discharge pipe 7 by
breaking the water screen in such a manner that the filth water is
dragged into the side of the water discharge pipe 7 (a siphon
effect).
[0262] At this time, the washing device 6 is directly connected to
a city water service pipe for supplying water from the outside, and
it is capable of spouting water under the city water pressure by
opening and closing an open/close valve. So, the washing device 6
easily adjust an amount of water which is spouted therefrom finely
by opening and closing the open/close valve. Due to this, it is
possible to spout the smallest amount of water which is enough to
discharge filth satisfactorily.
[0263] Moreover, in this western-style flush toilet, since the
water discharge socket 11 made of resin is adopted, the orifice 13a
can be formed accurately and easily. Due to this, even if the
smallest amount of water is used, a siphon effect can be surely
generated.
[0264] Finally, the washing device 6 opens the one of two valves
again, and water flows toward only the rim channel 4a by way of the
rim pipe 5. Due to this, the water flows out from plural water
spout openings which are mounted at the lower edge of the rim 4,
and water is reserved at the lower side of the bowl portion 1 and
the reserved water portion of the trap portion 2. Then, the washing
device 6 closes the one of two valves to complete the whole
operations.
[0265] Therefore, in the western-style flush toilet of this
embodiment, the water can be used no uselessly and efficiently, and
the discharge of filth can be performed even by a small amount of
water.
[0266] The above-mentioned embodiments are only for illustrative
purpose, and the first to ninth inventions can be carried out in
modes including various modifications within a range without
departing from the gist of the inventions.
Industrial Applicability
[0267] Accordingly, in the western-style flush toilet of the first
and second inventions, stains are hardly adhered to a rim, and as a
result, a nasty smell and the like are hardly generated.
Furthermore, the person who uses the western-style flush toilet
feels comfortable, and the western-style flush toilet is
sanitary.
[0268] The western-style flush toilet of the third invention can
realize the reduction of the manufacturing cost and the running
cost, simultaneously with the keeping of the condition that the
western-style flush toilet can be used during the cold season and
the prevention of the western-style flush toilet from being
damaged.
[0269] The western-style flush toilet of the fourth invention can
realize the reduction of the manufacturing cost.
[0270] The western-style flush toilet of the fifth invention is
excellent in the quietness, and there is no possibility that the
floor surface gets wet. In addition, the western-style flush toilet
is excellent in the washing ability of the bowl portion and the
filth discharging ability, and it can realize the reduction of the
manufacturing cost.
[0271] In the western-style flush toilet of the sixth invention,
water can be used no uselessly and efficiently, so the discharge of
filth can be performed even by a small amount of water.
[0272] The western-style flush toilet of the seventh and eighth
inventions as a whole is miniaturized. When such a western-style
flush toilet is adopted to residences and the like in recent years,
the saving of spaces can be achieved. Even in the toilet room which
cannot ensure a relatively large space, the person who uses the
toilet feels a wide space. Besides, due to the saving of spaces,
the person who uses the toilet easily moves in the toilet room, and
it is possible to utilize extra spaces for others. Furthermore,
since the western-style flush toilet is miniaturized, the saving of
materials for manufacturing the western-style flush toilet and the
reduction of the cost can be realized.
[0273] In the western-style flush toilet of the ninth invention,
the discharge of filth water can be performed even by a small
amount of water.
* * * * *