U.S. patent application number 10/565628 was filed with the patent office on 2007-02-01 for icebreaker and waterway with icebreaker.
This patent application is currently assigned to Bridgestone Corporation. Invention is credited to Masaru Kaneko.
Application Number | 20070025818 10/565628 |
Document ID | / |
Family ID | 34106842 |
Filed Date | 2007-02-01 |
United States Patent
Application |
20070025818 |
Kind Code |
A1 |
Kaneko; Masaru |
February 1, 2007 |
Icebreaker and waterway with icebreaker
Abstract
An icebreaker main body 16 in which an expandable/shrinkable
film body 18 is fixed, by fittings, to a wall surface 14 of a canal
10 is provided near a gate. When an ice 36 is formed in the
vicinity of the surface of water 34 of the canal 10, air is
supplied from a compressor 32 into the expandable/shrinkable film
body 18 to inflate the expandable/shrinkable film body 18. The ice
36 is crashed due to a pressure applied from the inflating
expandable/shrinkable film body 18, whereby the gate can be
opened/closed smoothly.
Inventors: |
Kaneko; Masaru; (Kanagawa,
JP) |
Correspondence
Address: |
SUGHRUE MION, PLLC
2100 PENNSYLVANIA AVENUE, N.W.
SUITE 800
WASHINGTON
DC
20037
US
|
Assignee: |
Bridgestone Corporation
10-1, Kyobashi 1-Chome Chuo-ku
Tokyo
JP
104-8340
|
Family ID: |
34106842 |
Appl. No.: |
10/565628 |
Filed: |
July 26, 2004 |
PCT Filed: |
July 26, 2004 |
PCT NO: |
PCT/JP04/10611 |
371 Date: |
July 11, 2006 |
Current U.S.
Class: |
405/61 ;
405/52 |
Current CPC
Class: |
E02B 1/003 20130101;
E02B 7/20 20130101 |
Class at
Publication: |
405/061 ;
405/052 |
International
Class: |
E02B 15/02 20060101
E02B015/02 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 25, 2003 |
JP |
2003-201840 |
Aug 7, 2003 |
JP |
2003-288426 |
Claims
1. An icebreaker for breaking through an ice formed at a channel,
comprising an expandable/shrinkable film body which is disposed
along a wall surface of the channel; a fixing member for fixing the
expandable/shrinkable film body to the wall surface; and an
air-supply means for supplying air to between the
expandable/shrinkable film body and the wall surface to inflate the
expandable/shrinkable film body at the channel inner side.
2. The icebreaker according to claim 1, further comprising a lower
film body provided in close contact with the wall surface, wherein
the air-supplying means supplies air into between the
expandable/shrinkable film body and the lower film body.
3. A channel provided with an ice breaker, comprising: a channel; a
gate for opening/closing the channel; and the ice breaker according
to claim 1 disposed near the gate of the channel.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to an icebreaker which can
break through ice formed when water at a channel is frozen, and to
a channel having the icebreaker.
BACKGROUND ART
[0002] For example, steel gates are disposed at a channel such as a
canal in order to open/close the channel (See Document 1) [0003]
Patent Document 1: Japanese Patent Application (JP-A) Laid-Open No.
2002-285533.
DISCLOSURE OF THE INVENTION
[0003] Problems to be Solved by the Invention
[0004] Typically, power outputted from a motor or the like is used
in order to open/close gates. However, when water at a channel is
frozen in winter time, it often becomes difficult to open/close the
gates smoothly.
[0005] It is considered that certain types of apparatuses may be
used in order to break through the ice. However, the operation
requires much time and labors, and a high cost performance as well,
which is not practical. Besides, it will take considerable time to
open/close the gates.
[0006] As a result of assiduous study for solving such a problem as
described above with a conventional art, the present inventors have
now completed the present invention. An object of the invention is
to provide an icebreaker having a simple structure for breaking
through ice formed at a channel, and a channel having the
icebreaker.
Means for Solving the Problems
[0007] The invention according to claim 1 is an icebreaker for
breaking through an ice formed at a channel, comprising an
expandable/shrinkable film body which is disposed along a wall
surface of the channel, a fixing member for fixing the
expandable/shrinkable film body to the wall surface, and an
air-supply means for supplying air to between the
expandable/shrinkable film body and the wall surface to inflate the
expandable/shrinkable film body at the channel inner side.
[0008] Next, an operation of the icebreaker according to claim 1
will be described.
[0009] At an ordinary time, the expandable/shrinkable film body is
disposed along the wall surface of the channel.
[0010] When temperature goes down, and for example, ice is formed
on the water surface of the channel, the air supplying means is
operated to inflate the extendable and/or contractive film
body.
[0011] As a result, ice formed on the water surface is pressed by
the inflating expandable/shrinkable film body and crashed
(broken).
[0012] After the expandable/shrinkable film body has been used, air
is discharged from the expandable/shrinkable film body so that the
expandable/shrinkable film body recovers its original shape such
that it is disposed along the water surface of the channel.
[0013] The invention according to claim 2 is the icebreaker
according to claim 1, further comprising a lower film body provided
in close contact with the wall surface, wherein the air-supplying
means supplies air to between the expandable/shrinkable film body
and the lower film body.
[0014] Next, an operation of the icebreaker according to claim 2
will be described.
[0015] In accordance with the icebreaker according to claim 2, air
is supplied to between the expandable/shrinkable film body and the
lower film body to thereby inflate the expandable/shrinkable film
body.
[0016] Since air is supplied to between the expandable/shrinkable
film body and the under film body, air tightness is significantly
improved.
[0017] Claim 3 is a channel provided with an ice breaker,
comprising a channel, a gate for opening/closing the channel, and
the ice breaker according to claim 1 or 2 disposed near the gate of
the channel.
[0018] Next, an operation of the channel having the icebreaker
according to claim 3 will be described.
[0019] When temperature goes down, and ice is formed on the water
surface in vicinities of the gates, the air-supplying means is
operated to inflate the expandable/shrinkable means.
[0020] As a result, ice formed on the water surface is pressed by
the inflating expandable/shrinkable means, and crashed (broken),
whereby the gates can be opened/closed.
Effect of the Invention
[0021] As described above, the icebreaker of the present invention
can provide an excellent effect in that, with a simple structure,
the icebreaker can break through ice formed at a channel.
[0022] Further, since the channel having the icebreaker of the
present invention is structured as described above, an excellent
effect is provided in that, with a simple structure, ice formed at
a channel can be broken to open/close the gates freely.
BRIEF DESCRIPTION OF THE DRAWINGS
[0023] FIG. 1 is a cross-sectional view of a canal according to a
first embodiment of the present invention;
[0024] FIG. 2 is a plan view of the canal;
[0025] FIG. 3 is a front view of an ice breaker main body;
[0026] FIG. 4 is a perspective view of an expandable/shrinkable
film body;
[0027] FIG. 5 is a cross-sectional view of a portion at which the
expandable/shrinkable film body is attached;
[0028] FIG. 6 is a cross-sectional view of an icebreaker main
body;
[0029] FIG. 7 is a plan view of a canal in a state in which the
icebreaker has been inflated;
[0030] FIG. 8 is a cross-sectional view of the canal showing a
state in which ice deposited at the surface of the
expandable/shrinkable film body is being peeled off therefrom;
[0031] FIG. 9(A) is a cross-sectional view of an icebreaker main
body according to a second embodiment of the present invention;
[0032] FIG. 9(B) is a front view of an edge portion of an air
pipe;
[0033] FIG. 10 is a front view of an ice breaker main body
according to another embodiment of the present invention; and
[0034] FIG. 11 is a plan view of a canal according to another
embodiment of the present invention.
BEST MODE FOR CARRYING OUT THE INVENTION
First Embodiment
[0035] With reference to the drawings, a channel provided with an
icebreaker according to a first embodiment of the present invention
will be described hereinafter.
[0036] As shown in FIG. 2, a canal 10 is equipped with a gate 12
which is opened/closed in a direction of arrow C. In FIG. 2, the
gate 12 drawn by a solid line represent a closed state of the canal
10, while the gate 12 drawn by a double-dashed line represents an
opened state thereof.
[0037] Wall surfaces 14 are formed by a material such as a
concrete, and disposed at both sides of the canal 10. Icebreaker
main bodies 16 are formed at the wall surfaces 14, respectively, at
a side to which the gate 12 is opened.
[0038] As shown in FIGS. 1 and 3, each icebreaker main body 16 has
a rectangular expandable/shrinkable film body 18 which is elongated
in the horizontal direction (direction of arrow B in FIG. 3).
[0039] As shown in FIG. 4, the expandable/shrinkable film body 18
is formed as a canvas-like member in which fabric materials 19a and
19b are woven in warp/weft directions and covered with an elastic
member 21 such as a rubber provided thereon. The fabric materials
19a arranged in a warp direction (direction of arrow A
corresponding to the vertical direction of the canal 10) extends in
a wavy manner, and the fabric materials 19b arranged in a weft
direction (direction of arrow B corresponding to the horizontal
direction of the canal 10) extend substantially linearly.
[0040] Consequently, the expandable/shrinkable film body 18 is not
stretched so much in the direction of arrow B but can be stretched
well in the direction of arrow A due to a linear expansion of the
fabric materials 19a.
[0041] As shown in FIGS. 3 and 5, a built-in fitting 20 is disposed
along an outer peripheral edge of the expandable/shrinkable film
body 18 on each wall surfaces 14, and anchor bolts 22 are also
arranged thereon so as to be spaced apart from each other at a
predetermined interval thereon.
[0042] The anchor bolts 22 are inserted into holes 15 formed on the
wall surface 14. Due to a solidification of an adhesive (such as an
epoxy resin) 17 with which the holes 15 are filled, the anchor
bolts 22 are fixed to the wall surface 14.
[0043] Further, the anchor bolts 22 are passed through the built-in
fitting 20.
[0044] An end portion of the extendable and/or contractive film
body 18 is disposed on the built-in fitting 20, and the anchor
bolts 22 are passed through the expandable/shrinkable film body
18.
[0045] Tap fittings 24 are mounted on the expandable/shrinkable
film body 18. Nuts 26 are screwed, through spring washers 25, onto
upper end portions of the anchor bolts 22 which are passed through
the tap fittings 24. The outer peripheral edge portion of the
expandable/shrinkable film body 18 is thus nipped between the tap
fittings 24 and the built-in fitting 20, and fixed to the wall
surface 14.
[0046] As shown in FIG. 6, an air pipe 28 is embedded in the wall
surface 14.
[0047] One end of the air pipe 28 is open toward the wall surface
14 to face the inner surface of the expandable/shrinkable film body
18.
[0048] To the other side of the air pipe 28 are mounted an
air-supply valve 30, an air-discharge valve 31, a compressor 32, a
check valve 33, a pressure gage 34, and an open/close valve 35.
[0049] When the air-discharge valve 31 is closed and the air-supply
valve 30 is opened, air can be supplied from the compressor 32 into
the expandable/shrinkable film body 18, and when the air-discharge
valve 31 is opened, air can be discharged from the
expandable/shrinkable film body 18.
[0050] Moreover, the check valve 33 and the pressure gage 34 which
are installed at the air pipe 28 are controlled to prevent a
reverse flow of the supplied air and an excessive pressure.
Pressure is checked by opening the open/close valve 35.
[0051] Further, for the convenience in use, motor valves can be
used as the air-supply valve 30 and the air-discharge valve 31.
(Operation)
[0052] Next, an operation of the present embodiment will be
described.
[0053] As shown in FIGS. 1 and 2, at an ordinary time, the
expandable/shrinkable film bodies 18 are disposed along the wall
surfaces 14 of the canal 10. Accordingly, the gate 12 can be
opened/closed smoothly.
[0054] A water level of the canal 10 according to the present
embodiment changes in a horizontal direction. In FIG. 1, a water
level 34a drawn by a solid line shows a high water level, and a
water level 34b drawn by a double-dashed line shows a low water
level.
[0055] For example, when the water level is high at the water level
34a and the temperature has dropped while the gate 12 is closed,
whereby, as shown in FIG. 6, an ice 36 has been formed on the water
surface 34 of the canal 10, air is supplied from the compressor 32
to the expandable/shrinkable film body 18. As a result, as shown in
FIG. 7, the expandable/shrinkable film body 18 is inflated.
[0056] For example, in a case in which the expandable/shrinkable
film body 18 is sized to a width of 3200 mm.times.a length of 915
mm, if the pressure within the expandable/shrinkable film body 18
is about 30.0 Kpa, the expandable/shrinkable film body 18 may be
inflated by about 300 mm at the central portion thereof.
[0057] By this, the ice 36 which is formed on the water surface of
the water 34 is pressed by the inflating expandable/shrinkable film
body 18 and crashed, whereby the gate 12 can be opened/closed
smoothly.
[0058] Since the working operation for crashing the ice 36 requires
only the operations of the compressor 32, the air-supply valve 30
and the air-discharge valve 31, the ice 36 can be crashed
easily.
[0059] Needless to say, the icebreaker main body 16 must be set so
as to meet the level of the water at which the ice 36 is formed,
and the expandable/shrinkable film body 18 must be measured so as
to reliably break the ice 36.
[0060] After the use of the expandable/shrinkable film body 18, air
is discharged from the expandable/shrinkable film body 18, whereby
the expandable/shrinkable film body 18 recovers its original shape
such that it is disposed along the wall surface 14.
[0061] Since the expandable/shrinkable film body 18 is deformed or
expanded by inflation, the expandable/shrinkable film body 18 thus
inflated is returned to the original flat shape by itself or by the
shrinking force thereof when the air inside the
expandable/shrinkable film body 18 is discharged.
[0062] Further, air within the expandable/shrinkable film body 18
can be forcibly discharged by using a pump or the like.
[0063] As shown in FIG. 8, there is a possibility that the ice 36
is deposited to the surface of the expandable/shrinkable film body
18 itself. In such a case, it suffices to simply inflate the
expandable/shrinkable film body 18 in order to peel off and drop
the ice 36 from the expandable/shrinkable film body 18.
[0064] In the present embodiment, the icebreaker main body 16 is
disposed only at the side to which the gate 12 is opened. However,
the icebreaker main body 16 may further be added at the other side
of the gate 12.
[0065] Further, it is preferable to attach in advance a pressure
control valve (not shown) to the compressor 32 in order to prevent
an unnecessarily high pressure from acting on the
expandable/shrinkable film member 18.
Second Embodiment
[0066] With reference to the drawing, a channel having an
icebreaker according to a second embodiment of the present
invention will be described next. Further, portions identical to
those in the first embodiment of the present invention are denoted
by the same reference numerals and descriptions thereof will be
omitted.
[0067] As shown in FIG. 9(A), in the icebreaker main body 16
according to the present embodiment, a lower film body 38, which is
formed from an elastic body such as a rubber and which has the same
size as that of the expandable/shrinkable film body 18, is provided
so as to be in close contact with the wall surface 14, and the
expandable/shrinkable film body 18 is mounted on the lower film
body 38.
[0068] Since no inflation of the lower film body 38 is carried out,
it is unnecessary for the lower film body 38 to be capable of
expanding as is the case with the expandable/shrinkable film body
18.
[0069] Further, both the lower film body 38 and the
expandable/shrinkable film body 18 are nipped between the built-in
fitting 20 and the tap fittings 24, and fixed to the wall surface
14.
[0070] As shown in FIG. 9(B), a flat donut-shaped fastening member
40 is embedded in the wall surface 14 at the end portion of the air
pipe 28.
[0071] A female thread 42 is formed at the inside of the flat
donut-shaped fastening member 40, and a male thread 46 of a tap
fitting 44 is screwed through the lower film body 38 and a washer
45 into the female screw 42.
[0072] The tap fitting 44 has a disk-shaped flange 48 whose
diameter is larger than that of an annular seal rib 47 of the tap
fitting 40, and the lower film body 38 is nipped between the tap
fitting 40 and the washer 45.
[0073] A through hole 50 for air communication is formed at the
axial core portion of the tap fitting 44.
[0074] In the present embodiment, the expandable/shrinkable film
body 18 is brought into contact with the lower film body 38 as an
elastic body, and a space into which air is blown is positioned
between the expandable/shrinkable film body 18 as an elastic body
and the lower film body as an elastic body. Thus, air tightness is
very high and leakage of air can be reliably prevented.
[0075] Consequently, the present invention can be suitably used
when cracks are formed on the wall surface 14.
Another Embodiment
[0076] In the above-described embodiment as shown in FIG. 3, the
expandable/shrinkable film body 18 before being inflated has a flat
rectangular configuration whose four corners have been chamfered.
However, the flat configuration of the expandable/shrinkable film
body 18 is not limited to this, and, as shown in FIG. 10, it can be
formed into another configuration such as a substantially O-shaped
or an ellipsoidal configuration.
[0077] Further, in the aforementioned embodiment, a recessed
portion 52 for accommodating the gate 12 is formed at the wall
surface 14 of the canal 10, and the icebreaker main body 16 is
provided at the recessed portion 52. However, as shown in FIG. 11,
the recessed portion 52 need not be formed at the wall surface
14.
INDUSTRIAL AVAILABILITY
[0078] The present invention can be applied, when water in a
channel is frozen in winter time, in order to break ice formed at
the channel with a simple structure so that a gate provided at the
channel can be opened/closed.
DESCRIPTION OF THE REFERENCE NUMERALS
[0079] 10 channel [0080] 12 gate [0081] 16 icebreaker main body
(ice breaker) [0082] 28 air pipe (icebreaker) [0083] 30 air-supply
valve (icebreaker) [0084] 31 air-discharge valve (icebreaker)
[0085] 32 compressor (icebreaker) [0086] 33 check valve
(icebreaker)
* * * * *