U.S. patent application number 10/343636 was filed with the patent office on 2004-05-13 for form panel and panel holding member.
Invention is credited to Tamura, Yuji.
Application Number | 20040089786 10/343636 |
Document ID | / |
Family ID | 18729219 |
Filed Date | 2004-05-13 |
United States Patent
Application |
20040089786 |
Kind Code |
A1 |
Tamura, Yuji |
May 13, 2004 |
Form panel and panel holding member
Abstract
It is an object of the present invention to enhance the
efficiency of a concrete form construction work. A form panel 1 to
be used includes a plurality of expandable parts 3, wherein the
expandable parts 3 include a plurality of projectedly bent rows 10
bent so as to be protruded toward a concrete depositing surface
side and a plurality of recessedly bent rows 11 which are bent so
as to be recessed toward the concrete depositing surface, the
projectedly bent rows 10 and the recessedly bent rows 11 are in
parallel to each other, each of the projectedly bent rows 10 and
the recessedly bent rows 11 is provided with a plurality of
longitudinal slits 7 at appropriate intervals from one another in a
straight line.
Inventors: |
Tamura, Yuji; (Hirakata-shi,
JP) |
Correspondence
Address: |
OBLON, SPIVAK, MCCLELLAND, MAIER & NEUSTADT, P.C.
1940 DUKE STREET
ALEXANDRIA
VA
22314
US
|
Family ID: |
18729219 |
Appl. No.: |
10/343636 |
Filed: |
July 2, 2003 |
PCT Filed: |
April 20, 2001 |
PCT NO: |
PCT/JP01/03428 |
Current U.S.
Class: |
249/13 ;
249/189 |
Current CPC
Class: |
E04G 17/0657 20130101;
E04B 2002/867 20130101; E04G 17/0655 20130101; E04B 2002/8688
20130101; E04B 2/8647 20130101; E04G 17/0728 20130101 |
Class at
Publication: |
249/013 ;
249/189 |
International
Class: |
E04G 009/00; E04B
001/00 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 4, 2000 |
JP |
2000-237338 |
Claims
1. A form panel comprising an expandable parts, wherein said
expandable parts comprises a plurality of projectedly bent rows
bent so as to be protruded toward a concrete depositing surface
side, and a plurality of recessedly bent rows which are bent so as
to be recessed toward the concrete depositing surface side, said
projectedly bent rows and said recessedly bent rows are in parallel
to each other, each of said projectedly bent rows and said
recessedly bent rows is provided with a plurality of longitudinal
slits at appropriate intervals from one another in a straight
line.
2. A form panel according to claim 1, further comprising a
plurality of separator inserting holes arranged at predetermined
intervals from one another, wherein the separator inserting hole
located at a central portion in a direction intersecting with a
direction of said projectedly bent row and recessedly bent row has
pointed ends in the direction of said projectedly bent row and
recessedly bent row.
3. A form panel according to claim 2, wherein most of an outline of
a separator inserting hole located at a central portion in a
direction intersecting with a direction of said projectedly bent
row and recessedly bent row is cut, and an inner side portion and
an outer side portion of the outline are connected to each other
through a non-cut portion of the remaining outline.
4. A form panel according to any one of claims 1 to 3, further
comprising a plurality of separator inserting holes arranged at
predetermined intervals, wherein at least the separator inserting
hole located at one end in a direction intersecting with a
direction of said projectedly bent row and recessedly bent row has
a portion of its outer peripheral line projecting toward a center
of the hole, said projecting portion is bent in a direction
intersecting with a panel surface by a separator in a state in
which the separator is inserted, this bent projecting portion is
engaged with a shaft of the separator to restrain the separator
from rotating around its axis.
5. A form panel in which a rib portion which is dented from an
outer surface side in a form assembled state is formed with a
separator inserting hole, the separator is inserted through said
separator inserting hole from its inner surface side to its outer
surface side, a wall spacer is mounted to a portion of the
separator projecting toward the outer surface side, said form panel
is assembled into a state in which the wall spacer abuts against
the peripheral portion of said rib portion from the outer surface
side, wherein diameters of the separator inserting holes in two
directions intersecting with each other have different shapes.
6. A panel holding member for holding a form panel on a basic
surface, wherein said panel holding member is long in one direction
and has a horseshoe-shaped cross section comprising a bottom
surface and a pair of rising portions rising upward from both ends
of the bottom surface, at least one of the rising portions is
provided with an opening through which a head of a nail striking
tool can pass.
7. A panel holding member according to claim 6, wherein at least
one of the rising portions is provided with a holding-height
adjusting piece which can be bent inward and which can support a
lower end of the form panel from below in its bent state.
8. A panel holding member according to claim 6 or 7, wherein an end
of the bottom surface in a direction intersecting with said cross
section is formed with an incision in said direction.
Description
TECHNICAL FIELD
[0001] This invention relates to a metal form panel used as a
sheathing board of a concrete form in civil engineering works, and
to a panel holding member for holding the form panel on a basic
surface.
BACKGROUND ART
[0002] Conventionally, a form panel made of plywood is mainly used
as a sheathing board of a concrete form. However, a metal form
panel which can be embedded as it is without being disassembled
even after a skeleton concrete is cured or hardened has been
developed in view of forest protection or because of troublesome of
disassembling operation and disposition problem after use. This
kind of metal form panel is formed by subjecting a thin steel plate
to sheet-metal working, and the form panels are formed with ribs in
place in a vertical direction for reinforcing the panels. When the
form is assembled, the form panels are assembled along a panel
holding member disposed on an oversite concrete and then, the ribs
of the form panels are connected to each other through a separator
so that the form panel can endure a pressure of the concrete which
is poured. The metal form panel has a constant width (e.g.,
effective width is 600 mm), and a plurality of form panels are
connected to one another to form a sheathing board having a
necessary width. When an end portion having a width narrower than
that of the form panel is generated, its size is adjusted using a
cut piece of the form panel or another metal panel. At that time,
since the panel is cut or a hole for inserting the separator is
formed on the ground, there is a problem that the operability is
inferior, and precision and strength are deteriorated in some
cases.
[0003] The separator is a rod member formed at its opposite ends
with male threads. When the separator is connected to the form
panel, as shown in FIG. 14, opposite male thread portions 31a of
the separator 31 are allowed to project outward from a separator
inserting hole 4 formed in a rib portion of the form panel 1, and
metal fittings 32 called as wall spacers are threadedly mounted to
the male thread portions 31a. A lateral reinforcing steel pipe 33
is placed on the wall spacer 32, the fastening metal fitting 34 is
fitted to the steel pipe 33 and then, a wedge 35 if inserted into a
groove hole 32a of the wall spacer to fix the steel pipe 33 on an
outer surface of the form panel 1.
[0004] The separator 31 and the wall spacer 32 are formed based on
assumption that they are used for a form panel made of plywood.
Therefore, when they are used for a metal form panel, it is
necessary to use a washer 37 to prevent the separator from rotating
together with the wall spacer when the wall spacer or a spacer 36
for adjusting a thickness are threadedly mounted. Since the number
of members to be used is large, it takes time to construct the form
and it is troublesome to manage the materials.
[0005] Separator inserting holes are previously formed in the form
panel at predetermined intervals from one another so that it is
possible to handle a case in which the form panel is bent at a
corner portion of the form and a case in which the form panel is
cut into an appropriate width as described above. However, there is
a defect that poured concrete leaks from the separator inserting
hole.
[0006] Further, a separator which is formed based on the assumption
that it is used for a form panel made of plywood is formed with
projecting portions 31b. The projecting portions 31b bite into the
form made of plywood to prevent the separator from rotating.
[0007] Therefore, the separator inserting hole of the conventional
metal form panel is formed into a circular shape (see FIG. 15)
having a diameter greater than an outer size of the projecting
portion 31b of the separator 31, or into a square shape (see FIG.
16) whose diagonal line is longer than the outer size of the
projecting portion 31b.
[0008] If the separator inserting hole is circular or square in
shape like the conventional metal form panel, however, since play
between an inner peripheral surface of the separator inserting hole
and an outer peripheral surface of the separator is large, the
separator 31 is deviated and an inner end surface of the wall
spacer 32 adversely comes out from a peripheral portion of the rib
portion 2 of the form panel 1 as shown in FIG. 17 in some cases due
to impact caused when the concrete is poured or vibration of a
vibrator. If such a matter is caused, the fastening metal fitting
34 may be loosened and comes out, the form itself may be deformed
or damaged and poured concrete may flow out.
[0009] The panel holding member has a horseshoe-shaped cross
section comprising a bottom surface and a pair of rising portions
rising upward from opposite ends of the bottom surface. A lower end
of the form panel is fitted to and held in the panel holding
member. The panel holding member is fixed to the oversite concrete
by concrete nail. However, since the panel holding member has the
horseshoe-shaped cross section as described above, it is difficult
to strike the concrete nail into the bottom surface thereof, and if
a portion which is separate from a body portion having the
horseshoe-shaped cross section is provided for striking the
concrete nail, there is another problem that the shape becomes
complicated, and the structure becomes bulky for transportation and
storage.
[0010] Further, there are problems of handling a case in which a
reference surface of the oversite concrete is uneven, and a
commonality of upper caps mounted to upper ends of the form panel
and the like, which the conventional panel holding member can not
overcome.
[0011] This invention has been accomplished in view of the above
circumstances, and it is an object of the invention to provide a
metal form panel in which concrete form construction work can
easily and efficiently be carried out on the ground and which can
be assembled strongly, and to provide a panel holding member which
is suitably used in combination with the metal form panel.
DISCLOSURE OF THE INVENTION
[0012] To solve the above problems, the present invention is
constructed as follows:
[0013] First, a first aspect of the present invention provides a
form panel includes a plurality of expandable parts, wherein the
expandable parts include a plurality of projectedly bent rows bent
so as to be protruded toward a concrete depositing surface side and
a plurality of recessedly bent rows which are bent so as to be
recessed toward the concrete depositing surface, the projectedly
bent rows and the recessedly bent rows are in parallel to each
other, each of the projectedly bent rows and the recessedly bent
rows is provided with a plurality of longitudinal slits at
appropriate intervals from one another in a straight line.
[0014] By changing the bending angles of the projectedly bent row
and recessedly bent row, it is possible to expand the expandable
parts in a direction intersecting with the longitudinal direction
of the projectedly bent row and recessedly bent row. Since the
projectedly bent row and the recessedly bent row are formed with
the plurality of longitudinal slits at appropriate intervals from
one another in the straight line, it is easy to change the bending
angles of the projectedly bent row and recessedly bent row.
Therefore, it is possible to easily change the effective width of
the form panel on the ground, it is unnecessary to cut the form
panel or prepare another metal panel for adjusting the size of the
form, and the operating efficiency of the form construction is
enhanced, and the precision and strength of the form are enhanced.
Further, since no discarded material is produced on the ground,
post-processing is unnecessary, which improves environmental
protection.
[0015] If the form panel is previously formed with the plurality of
separator inserting holes at predetermined intervals from one
another, it is convenient to connect the separator to the form
panel. In this case, if the separator inserting hole located at a
central portion in a direction intersecting with a direction of the
projectedly bent row and recessedly bent row has pointed ends in
the direction of the projectedly bent row and recessedly bent row,
it becomes easy to bend the form panel along a row of the separator
inserting holes.
[0016] Further, if most of an outline of a separator inserting hole
located at a central portion in a direction intersecting with a
direction of the projectedly bent row and recessedly bent row is
cut, and an inner side portion and an outer side portion of the
outline are connected to each other through a non-cut portion of
the remaining outline, it is possible to prevent the poured
concrete from leaking out in the normal state, and if the non-cut
portion is cut or bent if necessary, it is possible to remove the
inner side portion of the outline so that the separator can be
inserted.
[0017] Further, at least the separator inserting hole located at
one end in a direction intersecting with a direction of the
projectedly bent row and recessedly bent row has a portion of its
outer peripheral line projecting toward a center of the hole, the
projecting portion is bent in a direction intersecting with a panel
surface by a separator in a state in which the separator is
inserted, this bent projecting portion is engaged with a shaft of
the separator to restrain the separator from rotating around its
axis. With this structure, a detent washer for the separator which
is used in a conventional metal form panel is unnecessary.
[0018] According to a second aspect of the invention, a rib portion
which is dented from an outer surface side in a form assembled
state is formed with a separator inserting hole, the separator is
inserted through the separator inserting hole from its inner
surface side to its outer surface side, a wall spacer is mounted to
a portion of the separator projecting toward the outer surface
side, the form panel is assembled into a state in which the wall
spacer abuts against the peripheral portion of the rib portion from
the outer surface side, wherein diameters of the separator
inserting holes in two directions intersecting with each other have
different shapes.
[0019] More specifically, it is preferable that among the diameters
of the separator inserting holes in two directions intersecting
with each other, one of the diameter is larger than an outer size
of the projecting portion of the separator, and the other diameter
is smaller than the outer size of the projecting portion and larger
than a diameter of the separator. With this structure, the
projecting portion of the separator can be inserted, but only a
small play exists between the inserted separator and the separator
inserting hole and thus, it is possible to prevent the separator
from being deviated in position when the concrete is poured.
[0020] A panel holding member for holding a form panel on a basic
surface of the present invention is characterized in that the panel
holding member is long in one direction and has a horseshoe-shaped
cross section comprising a bottom surface and a pair of rising
portions rising upward from both ends of the bottom surface, at
least one of the rising portions is provided with an opening
through which a head of a nail striking tool can pass.
[0021] By providing the opening, it is possible to easily strike a
concrete nail to the bottom surface of the panel holding member,
and it is unnecessary to provide a portion for striking the
concrete nail separately from the body portion having the
horseshoe-shaped cross section unlike the conventional
technique.
[0022] Further, at least one of the rising portions is provided
with a holding-height adjusting piece which can be bent inward and
which can support a lower end of the form panel from below in its
bent state. With this structure, when the reference surface of the
oversite concrete is uneven, it is possible to adjust the holding
height of the form panel such that the form panel stays
horizontally.
[0023] Further, if an end of the bottom surface in a direction
intersecting with the cross section is formed with an incision in
the direction, since the end of the panel holding member can be
bent such that a interval between the pair of rising portions is
narrowed, it is possible to fit the ends of the panel holding
members to each other and to additionally connect the plurality of
panel holding members to each other.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] FIG. 1(a) is a front view and FIG. 1(b) is a plan view of a
form panel 1, FIG. 2(a) is a front view and FIG. 2(b) is a plan
view of a second separator inserting hole. FIG. 3(a) is a front
view and FIG. 3(b) is a plan view of a third separator inserting
hole. FIGS. 4(a), 4(b) and 4(c) are plan views of a normal state,
an extended state and a contracted state of an expandable parts 3,
respectively. FIG. 5 is a plan view (part 1) of the deformed form
panel 1. FIG. 6 is a plan view (part 2) of the deformed form panel
1. FIG. 7 is a plan view (part 3) of the deformed form panel 1.
FIG. 8(a) is a front view, FIG. 8(b) is a plan view and FIG. 8(b)
is a side view of a panel holding member. FIG. 9 is a side view
showing a state in which the form panel is held by the panel
holding member. FIG. 10 is a perspective view of a form. FIG. 11 is
a sectional view of an essential portion of the form. FIG. 12 is a
view showing a different shape of the third separator inserting
hole. FIG. 13 is a view showing another different shape of the
third separator inserting hole. FIG. 14 is a sectional view showing
an assembling state of a conventional form panel. FIG. 15 is a view
(part 1) showing a shape of the conventional separator inserting
hole. FIG. 16 is a view (part 2) showing a shape of the
conventional separator inserting hole. FIG. 17 is a sectional view
showing a state in which a separator is inserted through the
conventional separator inserting hole.
BEST MODE FOR CARRYING OUT THE INVENTION
[0025] A preferred embodiment of the present invention will be
explained below based on the drawings.
[0026] FIGS. 1 to 7 show a form panel. This form panel 1 is formed
by subjecting a thin steel plate (thickness is about 0.35 mm) to
sheet-metal working, and the form panel 1 is plated with zinc. The
form panel 1 is of a rectangular shape having a size of width of
600 mm (effective width).times.length of 1800 mm. A necessary
number of form panels are connected to one another in a lateral
direction to form a sheathing board having a necessary width.
[0027] The form panel 1 comprises rib portions 2 and expandable
parts 3 both directing in a vertical direction. The rib portions 2
and the expandable parts 3 are alternately arranged in the lateral
direction. Each the rib portion 2 is formed with separator
inserting holes 4 arranged at predetermined intervals from one
another in the vertical direction. A rib portion 2A is located at
laterally one end, and the rib portion 2A is formed with circular
separator inserting holes (first separator inserting holes) 4A. A
rib portion 2B is located at laterally the other end, and the rib
portion 2B is formed with separator inserting holes (second
separator inserting holes) 4B. As shown in FIG. 2, each of the
second separator inserting holes 4B comprises two rhombuses which
are vertically arranged such that portions of the rhombuses are
overlapped with each other, and vertically central side portions of
an outer peripheral line of the second separator inserting hole 4B
project toward a center of the hole. Since a thickness of the steel
plate constituting the form panel 1 is thin, if an external force
in a direction intersecting a surface of the panel is applied to
projecting portions 5 formed on the outer peripheral portion of the
second separator inserting hole, the projecting portions 5 are bent
relatively easily.
[0028] Rib portions 2C are formed at laterally central portion of
the form panel 1. Each of the rib portions 2C is formed with
separator inserting holes (third separator inserting holes) 4C. As
shown in FIG. 3, the third separator inserting hole 4C is shaped
into a rhombus having a longer vertical diagonal line and a shorter
lateral diagonal line. This third separator inserting hole 4C has a
structure in which most-portion of its outline is cut, and an inner
portion and an outer portion of the outline are connected to each
other through a partially remained non-cut portion 6. In an initial
stage, the hole is closed, but if the non-cut portion 6 is cut or
bent to remove the inner portion of the outline if necessary, the
above-described square hole is formed.
[0029] As shown with chain double-dashed lines in FIG. 3, the third
separator inserting hole 4C has such a size that a vertical size L1
is larger than an outer size of a projecting portion 31b of the
separator 31, and a lateral size L2 is smaller than the outer size
of the projecting portion 31b and larger than a diameter of the
separator 31. If these conditions are satisfied, the third
separator inserting hole 4C may have a shape other than the
rhombus. For example, the third separator inserting hole 4C may be
of rectangular shape as shown in FIG. 12, of ellipse as shown in
FIG. 13, or other shape.
[0030] A portion between the third separator inserting hole 4C and
the third separator inserting hole 4C is formed with vertical slits
7. For this reason, also because vertical ends of the third
separator inserting hole 4C are pointed, the rib portion 2C can
easily be bent along a vertical bending line 12.
[0031] Reference numbers 8 represents screw holes which are formed
between the first separator inserting hole 4A and the first
separator inserting hole 4A with the same pitch as that of the
first separator inserting hole 4A. Lateral outer end lines 9 and 9
are bent inward to ensure the reinforcement and handling
safety.
[0032] The expandable parts 3 comprises a projectedly bent row 10
which is bent so as to be protruded toward a concrete depositing
surface side, and a pair of recessedly bent rows 11 and 11 which
are bent so as to be recessed toward the concrete depositing
surface side located on both sides of the projectedly bent row 10.
The projectedly bent row 10 and the recessedly bent rows 11 and 11
are in parallel to each other. The projectedly bent row 10 and the
recessedly bent rows 11 and 11 are provided with a plurality of
longitudinal slits 7 in straight lines at appropriate intervals
from one another. Therefore, the bending angles of the projectedly
bent row 10 and the recessedly bent rows 11 and 11 can relatively
easily be changed only manually. A normal state of the expandable
parts 3 is as shown in FIG. 4(a), and if the bending angles are
increased, a lateral width of the expandable parts 3 is increased
as shown in FIG. 4(b), and if the bending angles are reduced, the
lateral width is reduced as shown in FIG. 4(c). Therefore, it is
possible to easily change the effective width of the form panel on
the ground, and it is unnecessary to cut the form panel or prepare
another metal panel. Thus, the operability of the form construction
is enhanced, and the precision and strength of the form are
enhanced. Further, since no discarded material is produced on the
ground, post-processing is unnecessary, which improves
environmental protection.
[0033] If the angles of the projectedly bent row 10 and the
recessedly bent rows 11 and 11 of each the expandable parts 3 are
adjusted and the rib portion 2C is bent along the vertical bending
line, it is possible to deform the form panel 1 to a desired shape
as shown in FIGS. 5 to 7.
[0034] FIGS. 8 and 9 show a panel holding member. This panel
holding member 20 is long in one direction, and has a
horseshoe-shaped cross section comprising a bottom surface 21 and a
pair of rising portions 22 and 23 rising upward from both ends of
the bottom surface and having different lengths. A tip end 22a of
the shorter rising portion 22 is bent diagonally outward so that an
end of the form panel 1 can smoothly be guided inside of the panel
holding member 20. The shorter rising portion 22 is formed with
openings 24 at predetermined intervals from one another so that
when a concrete nail for fixing the panel holding member on the
oversite concrete is struck to the bottom surface, a nail striking
device or a hammer can be operated.
[0035] Holding-height adjusting pieces 25 surrounded by
horseshoe-shaped lines of cutting plane are provided two each at
vertically opposite sides of the opening 24. The holding-height
adjusting piece 25 can be bent inward, and in its bent state, the
holding-height adjusting piece 25 supports a lower end of the form
panel 1 from below. A height of each holding-height adjusting piece
25 is different so that the holding-height of the form panel 1
including a case in which no holding-height adjusting pieces 25 are
bent can be adjusted in four levels. Further, the opening 24 is
formed at its opposite sides with screw holes 26 and 26 in the
vicinity of the opposite sides.
[0036] The bottom surface 21 of the panel holding member 20 is
formed at its one end with a longitudinal incision 27. A terminal
portion 27a of the incision 27 is circular in shape having a
diameter larger than a width of the incision 27 so that stress is
not concentrated. By providing the incision 27, the end of the
panel holding member 20 can be bent such that a interval between
the pair of rising portions 21 and 22 is narrowed. Therefore, it is
possible to fit an end of a panel holding member 20 whose interval
between the rising portions is narrowed into an end of another
panel holding member 20, and to connect a plurality of panel
holding members 20 with one another.
[0037] Next, a constructing method of the form using the form panel
1 and the panel holding member 20 will be explained (see. FIGS. 10
and 11).
[0038] First, the panel holding member 20 is fixed by a concrete
nail on a necessary position on the oversite concrete 30. If a
concrete nail is struck at a position of the bottom plate 21 facing
the opening 24, it is easy to operate the nail striking device or
the hammer.
[0039] Next, in a state in which a lower end of the form panel 1 is
fitted into the panel holding member 20, the form panel 1 is
assembled. If an upper surface of the oversite concrete 30 is
uneven and the panel holding member 20 is not horizontal, the lower
end of the form panel 1 is adjusted by the holding-height adjusting
piece 25 such that the lower end is directed horizontally. The form
panels 1 are arranged in the lateral direction, and laterally
outermost rib portions 2A and 2B of the adjacent pair of form
panels 1 are temporarily connected to each other through a screw.
At that time, the rib portion 2A having the first separator
inserting hole is set outer side, and the screw is threadedly
engaged using a screw hole 8.
[0040] Thereafter, opposed form panels 1 and 1 are connected to
each other using the separator 31 and the wall spacer 32. When the
form panels 1 and 1 are arranged using all of the effective width,
the end of the separator passes through the first separator
inserting holes 2A and the second separator inserting holes 2B of
the pair of form panels 1 and 1 from the inner side toward the
outer side. At the same time, as shown with the chain lines in FIG.
2, projecting portions 5 and 5 of the second separator inserting
hole 2B pass through the first separator inserting hole 2A and bent
outward. Then, the wall spacer 32 is threadedly engaged with the
male thread portion 31a of the separator 31, but since the
projecting portions 5 and 5 engage with projecting portions 31b and
31b formed on a shaft portion of the separator to restrain the
separator 31 from rotating, the wall spacer 32 can reliably be
threadedly engaged. An inner end surface of the wall spacer 32 is
received by an outer surface of the rib portion 2A. With this
structure of the separator connecting portion, a space for
adjusting the thickness and a separator-detent washer which are
used in a conventional metal form panel are unnecessary.
[0041] When a form panel 1 having a width narrower than a standard
lateral width (e.g., 600 mm) or a form panel 1 having a width wider
than the standard lateral width is required, it is possible to
satisfy this requirement by expanding or contracting the expandable
parts 3. Further, as shown in FIGS. 5 to 7, the form panel 1 can be
deformed into a desired shape and used at a corner portion of the
form. Since the rib portions 2 and the expandable parts 3 are
arranged at relatively narrow intervals, a smooth surface closer to
a curved surface can be obtained.
[0042] When the separator 31 is inserted through the third
separator inserting hole 4C and the form panels 1 and 1 are
connected to each other, the inner side portion of the outline of
the third separator inserting hole 4C is removed to form a
predetermined rhombus hole, and the separator 31 is inserted
through this hole. As shown in FIG. 3, the separator 31 can be
inserted through the third separator inserting hole 4C coinciding a
direction (longitudinal direction) in which the diameter of the
third separator inserting hole 4C is larger and a direction of the
projecting portion 31b of the separator 31 with each other. In a
state in which the separator 31 is inserted through the third
separator inserting hole 4C, there is almost no play between the
inner peripheral surface of the third separator inserting hole 4C
and the outer peripheral surface of the separator 31. Therefore,
even if an impact at the time of striking of the concrete nail or
vibration of a vibrator is applied, the separator 31 is not
deviated.
[0043] After the form panel 1 is assembled in this manner, the
lateral reinforcing steel pipe 33 is fastened and fixed to the
outside of the form panel 1. Since the form panel 1 is provided
with a large number of vertical rib portions 2 and the expandable
parts 3, the form panel 1 has high strength against the bending
force in the vertical direction irrespective of the fact that the
form panel 1 is formed of super-thin plate. Therefore, it is
possible to obtain a form having sufficient strength only by
providing the reinforcing steel pipe 33 in the lateral
direction.
[0044] Lastly, the panel holding member 20 is mounted to the upper
end of the form panel 1 as an upper end cap of the form panel 1.
The panel holding member 20 has a simple structure comprising only
a body portion having the horseshoe-shaped cross section and the
panel holding members 20 can easily be connected to each other in
the longitudinal direction utilizing the incision 27 formed on the
one end. Therefore, the panel holding member 20 can also be used
for the upper end cap.
[0045] Then, concrete is provided in the form. Excessive water of
the concrete is appropriately discharged out from the slits 7
formed in the rib portions 2 and the expandable parts 3, and the
concrete is cured in an ideal state. Since the third separator
inserting hole 4C is closed in the normal state, concrete does not
leak from the third separator inserting hole 4C. After the concrete
is cured, the reinforcing steel pipe 33 is disassembled, and the
wall spacer 32 is removed from the separator 31. The form panel 1
and the separator 31 are left in their embedded states.
INDUSTRIAL APPLICABILITY
[0046] As apparent from the above explanation, the lateral width of
the form panel of the present invention can be adjusted, and the
form panel can be bent along the vertical bending line. Therefore,
it is possible to easily construct a sheathing board having desired
size and shape. Since the separator inserting hole is variously
worked, it is easy to install the separator, and the number of
members required to install the separator can be reduced.
[0047] Further, according to the form panel of the present
invention, since diameters of the separator inserting holes
intersecting with each other are different, a projecting portion of
the separator can be inserted through the separator inserting hole,
but there is almost no play between the separator and the inner
peripheral surface of the separator inserting hole, and the
separator is not deviated in position. Therefore, if the form panel
of the present invention is used, it is possible to prevent the
form from being deformed and damaged which may be caused due to an
impact at the time of striking of the concrete nail or vibration of
a vibrator, and it is possible to prevent the concrete from flowing
out.
[0048] Furthermore, the panel holding member of the present
invention can easily be fixed to the oversite concrete by a
concrete nail using a nail striking tool, and the holding-height of
the form panel can be adjusted with respect to an uneven surface of
the reference surface of the oversite concrete. Further, the panel
holding member of the invention can also be used as an upper cap
which is put on the upper end of the form panel.
[0049] Therefore, if a concrete form is constructed using the form
panels and the panel holding members of the present invention, it
is possible to obtain various merits that the operability is
enhanced, precision and strength of the constructed concrete form
are excellent, the number of attachment members can be reduced and
the like.
* * * * *