JPH1162225A - Concrete form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete form in which both the surface side and the back side of a face plate are usable as placement surfaces by composing it with a polygonal side plate frame and the face plate placed on a receiving member, and detachably disposing the face plate on the frame by an installation member horizontally inserted from a side end surface inward. SOLUTION: A face plate 5 is placed on a receiving member 2, an installation member 12 is installed on a frame 4, and an upper side part 13 of the installation member 12 is inserted into an installation hole 11 for the face plate 5. A lower side part 14 of it is disposed under the receiving member 2 to be horizontally inserted through an installation member insertion hole 10, and the receiving member 2 and the face plate 5 are elastically held by the upper and lower parts 13, 14, so it is installed on the receiving member 2. The installation member 12 is bent to form a declined guide part 15 at the tip of the lower part 14, and as the installation member 12 is inserted, the lower part 14 is guided by the guide part 15 to be introduced to a lower surface of the receiving member 2. Hole boring work is not necessary for both the surface side and the back side of the face plate 5, but they are usable as concrete placement surfaces, so the face plate 5 can be inverted to be used when one side is damaged. The face plate 5 can be easily changed as necessary, so the frame 4 can be reused.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete formwork having a structure in which a receiving member is provided inside a frame such as a rectangle and a face plate is mounted on the receiving member.

[0002]

2. Description of the Related Art In a concrete formwork having a structure in which a receiving material is provided inside a frame such as a rectangle and a face plate is mounted on the receiving material and attached to the frame, means for fixing the face plate to the frame depends on the material of the frame and the face plate. 34. For example, in the case of steel, as shown in FIG. 34, a bolt insertion hole 103a is formed in a receiving member 103 provided inside a frame 102 around a concrete formwork 101, and a face plate 1 is formed.
In general, a screw hole 104a is made in the hole 04, and a bolt 105 is screwed into the screw hole 104a of the face plate 104 from the bolt insertion hole 103a and fixed to the receiving member 103. In the case of wood, for example, it is common to nail the face plate to the receiving material by nailing it perpendicular to the surface at the periphery of the face plate.
If it is made of synthetic resin, fixation by nailing similar to wood or fixation by bolts similar to steel can be considered.

[0003]

The above-mentioned conventional steel concrete formwork 101 has a screw hole 1 on one side of a face plate 104.
Since the face plate 104 has the structure with the screw holes 104a, it is inconvenient to use the face having the screw holes 104a as the concrete casting face even if the face plate 104 is used upside down. Therefore, the rear face cannot be used as the concrete casting face. . Also, the work of screwing the bolt 105 is complicated and inefficient. Also, when fixing by nailing on a concrete form made of wood or synthetic resin, it is inconvenient to use the nailed hole once as the concrete casting surface, so the face plate once fixed to the frame is turned upside down. Can not be used.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks, and it is possible to use a face plate as a concrete casting surface on both front and back surfaces, and furthermore, a concrete mold in which the face plate can be easily attached to a frame. The purpose is to provide a frame.

[0005]

The concrete formwork of the present invention which solves the above-mentioned problems comprises a polygonal frame composed of peripheral side plates each having a horizontal receiving member inside,
The frame comprises a face plate mounted on the receiving member, and the face plate is detachably attached to the frame by a fixture horizontally inserted into the inside from a side end face thereof.

According to a second aspect of the present invention, the frame of the concrete formwork of the first aspect is made of a steel plate, and the face plate is made of a synthetic resin.

According to a third aspect of the present invention, in the concrete form of the first or second aspect, the receiving member is provided at an intermediate height of the side plate.

According to a fourth aspect, in the concrete form of the first or second aspect, the receiving member is provided at an upper end position of the side plate.

According to a fifth aspect of the present invention, in the concrete formwork of the third aspect, a substantially U-shaped mounting member made of an elastic material is horizontally pushed through a mounting hole formed in the side plate, and an upper portion of the mounting plate is attached to the upper surface of the mounting plate. By horizontally inserting the lower part into the inside from the side end face of the bracket and arranging the lower part on the lower surface of the receiving material, the receiving material and the lower part of the face plate are elastically sandwiched between the upper and lower parts of the fixture, and It is characterized by being attached.

According to a sixth aspect of the present invention, there is provided the concrete formwork according to the fifth aspect, wherein a mounting hole for inserting an upper portion of the U-shaped mounting tool is provided on a side end surface of the face plate.

According to a seventh aspect of the present invention, the upper part of the U-shaped fixture in the concrete form of the fifth aspect has a pointed tip, and the pointed tip is pierced into the side end face of the face plate. And

According to an eighth aspect of the present invention, in the concrete form of the fifth aspect, the U-shaped mounting member is formed by bending a leaf spring into a substantially U-shape.

A ninth aspect of the present invention is characterized in that a downwardly inclined guide portion is formed at the tip of the lower portion of the U-shaped fitting in the concrete formwork of the eighth aspect.

According to a tenth aspect of the present invention, in the concrete formwork according to the eighth aspect, a U-shaped notch is formed in the upper portion of the U-shaped fitting except for a tip end side thereof, and the notch is formed by raising the notched inner region upward. Characterized in that a cut-and-raised piece is provided.

According to an eleventh aspect of the present invention, there is provided a concrete formwork according to the eighth aspect, wherein a bent back piece for engagement which is bent upward from the front end and is inclined upward is provided at a front end of the upper part of the U-shaped fixture. I do.

According to a twelfth aspect of the present invention, the face plate of the concrete formwork according to the third aspect is attached to the side plate of the frame by a bar material which extends horizontally through the inside of the face plate and has both ends detachably fitted into holes formed in the side plate. It is characterized by the following.

According to a thirteenth aspect of the present invention, the face plate of the concrete formwork of the third aspect resiliently extends in a horizontal plane from a fitting insertion hole formed above the receiving member position of the side plate to a mounting hole provided in the face plate. It has almost right and left arms that can expand and contract left and right.
A mounting tool having a character shape and having engagement projections is inserted into the left and right outer portions of the arm, and attached to the side plate of the frame by the engagement projections.

According to a fourteenth aspect of the present invention, the face plate of the concrete formwork according to the fourth aspect is configured such that the lower portion of the substantially U-shaped fixture made of an elastic material is horizontally pushed through a fixture insertion hole formed in the side plate to receive the receiving material. The receiving member is disposed on the lower surface, and the upper portion of the mounting member is inserted horizontally from the side end surface of the face plate into the inside, so that the receiving member and the lower portion of the face plate are elastically sandwiched between the upper and lower portions of the mounting member. It is characterized by being attached to.

According to a fifteenth aspect of the present invention, the lower portion of the U-shaped fixture in the concrete formwork of the eighth aspect extends inward from the receiving member, and the inner edge of the receiving material is provided at the tip end of the lower portion. In this case, an upward projection that acts to prevent the falling off is provided.

According to a sixteenth aspect of the present invention, the face plate in the concrete formwork of the first aspect has a structure in which a polypropylene sheet is attached to both sides of expanded polypropylene.

[0021]

FIG. 1 is a block diagram showing an embodiment of the present invention.
33 will be described with reference to the embodiment shown in FIG. 1 to 6 show one embodiment of the present invention (claims 1, 2, 3, 5, 6, and 7).
Examples of Examples 8 and 9) are shown. FIG. 1 is a plan view of a concrete formwork 1 according to one embodiment of the present invention, and FIG.
A is an enlarged sectional view, and FIG. 3 is an exploded perspective view of the concrete form 1. FIG. 4A is an enlarged view of a part a of FIG.
(B) is a left side view of FIG. 4 (A), and FIG. 5 (A) is FIG.
FIG. 5B is a left side view of FIG. 5A in a state before the fixture 12 is inserted in FIG. As shown in these figures, this concrete form 1 is placed on a frame 4 which is formed in a polygonal shape by a peripheral side plate 3 having a horizontal receiving material 2 inside, and the receiving material 2 of the frame 4. Face plate 5. The concrete form 1 of the embodiment is rectangular, the frame 4 is made of steel, and the face plate 5 is made of synthetic resin such as foamed polypropylene. The face plate 5 may have a structure in which a polypropylene sheet is attached to both sides of foamed polypropylene. The frame 4 includes a reinforcing middle rib 6 extending between the centers of the short sides of the rectangle, and a receiving member 7 is also provided on the middle rib 6. The peripheral side plate 3 is provided with a joint hole 8 for joining the molds.

The receiving member 2 is provided at a height intermediate position of the side plate 3, and the face plate 5 is mounted on the receiving member 2 so as to fit inside the frame 4. In each side plate 3 on the four sides of the frame 4, mounting holes 10 are formed at predetermined intervals so that openings are formed above and below the height of the receiving member 2, and the face plates 5 of the face plate 5 correspond to the mounting holes 10. Mounting hole 1 on the peripheral side edge
1 is provided. The mounting holes 11 are provided in common with the mounting holes in a steel concrete form (so-called metal form) in which ribs are welded and fixed in a grid pattern around and inside the face plate. 1 can be used together with a metal foam.

The face plate 5 placed on the receiving material 2
Is attached to the frame 4 by a substantially U-shaped attachment 12 made of an elastic material. That is, as shown in FIG. 4, FIG. 5, or FIG. 6, the upper part 13 of the U-shaped fitting 12 is inserted into the mounting hole 11 of the face plate 5, and the lower part 14 is formed on the lower surface of the receiving material 2. The lower part (lower part than the mounting hole 11) 5a of the receiving member 2 and the face plate 5 is vertically pushed into the mounting part 12 by the upper and lower parts 13, 14 of the mounting part 12 so that Are attached elastically to the receiving member 2.

The fitting 12 of the embodiment is formed by bending a leaf spring into a substantially U-shape, and forms a guide portion 15 inclined downward at the tip of the lower portion 14. Therefore, when the fixture 12 is inserted, the lower portion 14 is easily guided to the lower surface of the receiving member 2 by the guide of the guide portion 15. As shown in FIG. 4 (c), when a folded guide portion 15 'is formed at the tip of the lower portion 14 of the fixture 12, when the fixture 12 is removed, a hammer 17 or the like is used as shown. It can be easily removed by hitting.
Further, as shown in FIG. 4A and the like, the thickness of the fixture 12 is made smaller than the thickness of the side plate 3 so that the fixture 12 does not protrude from the outer peripheral surface of the concrete form 1 (the outer surface of the side plate 3). I have.

According to the concrete form 1 described above, since the face plate 5 does not have a hole-formed portion such as a screw hole on both the front and back surfaces, and there is no nail hole or the like left. It can be used as a casting surface. Therefore, when the surface of the face plate 5 (the concrete casting surface) is damaged, it can be used upside down. In addition, when the surface plate 5 is not simply a smooth surface but is formed with an uneven pattern surface, if the front and rear surfaces are formed with different uneven patterns, two types of uneven patterns can be selected.

The mounting of the face plate 5 on the frame 4 is performed by dropping the face plate 5 into the frame of the frame 4.
And the mounting tool 12 is inserted from the side, so that the workability is extremely good. In addition, the attachment 12 can be removed simply by pulling it out, which is very simple. Thus, attachment and detachment of the attachment 12 is extremely simple. Also, since the face plate 5 can be freely attached and detached, the face plate 5
When is damaged, the face plate 5 can be easily replaced, and the frame 4 can be reused. Also, it is possible to prepare a variety of uneven surface plates, and replace the surface plates according to the purpose.

When a polypropylene-based synthetic resin is used as the material of the face plate 5, a release agent is not required, and workability is also improved in this respect. When, for example, foamed polypropylene is used as the material of the face plate 5, the weight of the face plate 5 is further reduced, and the weight of the concrete formwork 1 is reduced. Therefore, the size of the mold can be increased.

In the case where the receiving member 2 is provided at an intermediate position of the height of the side plate 3 of the frame 4 as in the embodiment, the periphery of the face plate 5 is restrained by the side plate 3 of the frame 4. Breakage of the corners of the face plate 5 can be prevented.

FIGS. 7A and 7B show another embodiment (an embodiment of claim 10) of the fixture. This fixture 12A is
The upper portion 13 is provided with a cut-and-raised piece 13a for engagement formed by making a U-shaped cut with the tip side left and raising the cut inner region upward. According to this attachment 12A, the cut-and-raised side 13a elastically engages with the upper surface of the attachment hole 11, so that the attachment 12A can be prevented from coming off accidentally.

FIGS. 8A and 8B show still another embodiment of the fixture. The mounting fixture 12B is obtained by inclining the upper part 13 and the lower part 14 in such a manner that the distal end side is narrowed. According to the attachment 12B, the elastic clamping force sandwiched between the upper portion 13 and the lower portion 14 can be further increased.

FIGS. 9 (a) and 9 (b) show still another embodiment (an embodiment of claim 11) of a fixture. This fixture 12
C is provided with a folded inclined piece 16 for engagement which is folded from the tip and inclined upward at the tip of the upper portion 13. According to this mounting fixture 12C, since the folded inclined piece 16 elastically engages with the upper surface of the mounting hole 11, it is possible to prevent the mounting fixture 12C from coming off accidentally.

FIGS. 10A and 10B show still another embodiment (an embodiment according to claim 7) of a fixture. This fixture 12
D is obtained by sharpening the tip side of the upper portion 13 'at an acute angle. In this case, the mounting hole 11 is not provided on the face plate 5 side. Then, the upper portion 13 ′ of the attachment 12 D is inserted into the face plate 5 in such a manner that the pointed tip 13 a ′ pierces the side end surface of the face plate 5. The lower portion 14 of the fixture 12D is the same as described above. A concave portion such as a V-groove may be provided on the face plate 5 side so as to serve as a guide when piercing the upper portion 13a '. According to this configuration, since it is not necessary to provide the mounting holes 11 on the face plate 5 side, the structure of the face plate 5 is significantly simplified.

FIG. 11 shows still another embodiment of the attachment (an embodiment of claim 15). This fixture 12E is located inside the receiving member 2 (see FIG. 1).
1 to the right), and an upward projection 14a that contacts the inner edge of the receiving member 2 and functions to prevent the lower member 14 from coming off. In addition, at the tip of the lower portion 14 in the illustrated example, a folded guide portion 15 ″ is provided.
Is provided. According to this configuration, the presence of the upward projection 14a can reliably prevent the attachment 12 from coming off.

FIGS. 12 to 15 show still another embodiment of the present invention (an embodiment of claim 12). The concrete formwork 1 'of this embodiment uses a round bar (bar material) 20 as a fixture. That is, the face plate 5 is attached to the frame 4 by a round bar 20 which is passed through a hole 21 passing horizontally through the inside of the face plate 5 and removably fitted into holes 3a, 3b formed at both ends of the side plate 3 of the frame 4. Configuration. This round bar 2
Reference numeral 0 indicates that the small-diameter mounting shaft portion 20a formed at the front end (left end in FIG. 14) is fitted into the small-diameter hole 3a of the side plate 3, and the rear end (right end in FIG. 14) is, for example, conical. To prevent it from coming off by tightly fitting it into the hole 3b of the side plate 3. In this embodiment, as shown in FIG. 13, the short side of the face plate 5 is provided with a mounting hole 11 in the same manner as in the above-described embodiment, and is mounted on the receiving member 2 with a mounting tool 12. . However,
Since a sufficient connection can be made only by the round bar 20, the connection between the face plate 5 and the frame 4 on the short side may be omitted (that is, the mounting hole 11 in FIG. 13 may be omitted).

FIGS. 16 to 20 show still another embodiment of the present invention (an embodiment of claim 13). In this embodiment, a mounting tool insertion hole 25 formed above the position of the receiving member 2 of the side plate 3 is resiliently left and right in a horizontal plane (see FIGS. 17 and 18). )), A mounting tool 29 having a substantially U-shape having left and right arms 27 which can be expanded and contracted and having engagement projections 28 at the left and right outer portions of the arm 27 is inserted. In this configuration, the face plate 5 is attached to the side plate 3 of the fourth embodiment.

The attachment 29 in the illustrated example is formed by molding a synthetic resin, for example, and has a slightly thick plate shape when viewed from the side, and has inwardly extending portions 27a at the tips of the left and right arms 27. , A configuration in which an elastic reaction force portion 30 having an arcuate curve is formed on the base side. In this example, the engaging projections 28 of the mounting fixture 29 are formed in the form of steps.
Are engaged with the left and right step portions 25 a of the fitting insertion hole 25 of the face plate 5, and are attached to the side plate 3 of the frame 4. In addition,
The mounting hole 26 in the illustrated example is provided by embedding a hollow member 32 made of metal or synthetic resin in the face plate 5.
In addition, the hole shape of the fitting insertion hole 25 is such that the vicinity of the left and right ends of the rectangle is slightly narrowed to form the step 25aga.

When this mounting tool 29 is pushed into the mounting hole 26 from the mounting hole 25 as shown in FIG. 18, the left and right arms 27 are closed and housed in the mounting hole 26 as shown in FIG.
Then, when opened, the left and right arms 27 open as shown in FIG.
a, and the face plate 5 is attached to the side plate 3 of the frame 4. In this case, the attachment 29 is pushed outward by the reaction force of the elastic reaction portion 30, and the projection 28 is engaged with the step portion 25a without looseness. In addition, this fixture 2
The operation of attaching and detaching 9 may be performed using an appropriate tool.

FIGS. 21 to 26 show still another embodiment of the present invention (similarly, an embodiment of claim 13). In this embodiment also, the mounting tool insertion hole 35 formed above the position of the receiving member 2 of the side plate 3 and the mounting hole 36 provided in the face plate 5 are elastically left and right in the horizontal plane (right and left in FIGS. 22 and 23). A fitting 39 having a generally U-shaped arm having left and right arms 37 which can be expanded and contracted and having a projection 38 for engagement is inserted into the left and right outer portions of the arm 37, and the frame 4 is formed by the projection 38 for engagement. It is a structure attached to the side plate 3.

The attachment 39 in the illustrated example is formed by bending a leaf spring, for example, and has outwardly extending portions 37a extending outward at the tips of the left and right arms 27, and the engaging projections 38 are provided on the arms 37. The protrusion 38 is engaged with the left and right steps 42 a in the mounting hole 36 and is attached to the side plate 3 of the frame 4. In addition,
The mounting hole 36 is formed by embedding and forming a hollow member 42 made of metal or synthetic resin having the step portions 42a on the left and right inside the hollow inside the face plate 5.

When this mounting tool 39 is pushed into the mounting hole 36 from the mounting hole 35 as shown in FIG. 23, the left and right arms 37 are closed and housed in the mounting hole 36 as shown in FIG.
Then, as shown in FIG. 25, the left and right arm portions 37 are opened, and the projections 38 are engaged with the left and right step portions 42a in the mounting holes 36 and are prevented from falling off, whereby the face plate 5 is connected to the side plate of the frame 4. 3 attached. When removing the attachment 39, as shown in FIG. 26, the space between the left and right arms 37 is narrowed by slightly raising the left and right outwardly extending portions 37a, and the projection 38 is removed from the step portion 42a. Pull out. In addition,
The operation of attaching and detaching the attachment 39 may be performed using an appropriate tool.

FIGS. 27 to 30 show still another embodiment of the present invention. The attachment 49 in the illustrated example has a configuration in which a slightly wide leaf spring is bent in a substantially horizontal U-shape when viewed from the side, and a stepped portion 48 for engagement is formed at the distal end thereof by bending. The portion 48 is engaged with the upper and lower steps 45a formed on the left and right portions of the mounting hole 45, and the frame 4
Attached to the side plate 3. The mounting holes 4 in the illustrated example
6 is a hollow plate 52 made of metal or synthetic resin.
It is provided by being embedded in the inside. Further, the hole shape of the fitting insertion hole 45 is such that the left and right portions are slightly smaller than the height in the mounting hole 46, thereby forming the above-mentioned step 45a with which the step portion 48 of the fitting 49 is engaged. doing.
In addition, a hole 49a for removing operation is formed at the tip of the mounting tool 49.

When the mounting tool 49 is closed as shown in FIG. 27 and is pushed into the mounting hole 46 from the mounting tool insertion hole 45, the structure shown in FIG.
As shown in FIG. 8, the opening 48 is opened up and down within the mounting hole 46, and the step 48 on the tip side engages with the step 45 a of the mounting hole 45 of the side plate 3 to prevent it from falling off.
Attached to the side plate 3.

At the time of removing the attachment 49, as shown in FIG.
For example, the driver 50 can be easily removed by hooking the tip of the driver 50 and pulling it forward.

FIGS. 31 to 33 show still another embodiment of the present invention (the fourth and 14th embodiments). This embodiment is
Although the receiving member 2 'is provided at the upper end position of the side plate 3 of the frame 4, the face plate 5 is placed on the receiving member 2',
It is attached to the receiving member 2 ′ by the attachment 12 similar to that shown in FIGS. In this case, the lower part 14 of the fixture 12 is pushed horizontally through the fixture insertion hole 10 provided in the side plate 3 and arranged on the lower surface of the receiving member 2 ′, but the upper part 13 of the fixture 12 is directly connected to the face plate 5. Is horizontally inserted into the mounting hole 11 from the side end surface of As a result, the upper and lower portions 1
The receiving member 2 ′ and the lower portion 5 a of the face plate 5 are elastically sandwiched between 3 and 14, and the face plate 5 is attached to the receiving material 2 ′.

The attachment for attaching the face plate to the frame is not limited to that of the embodiment, and the design can be changed as appropriate. In short, it is not necessary to perform any processing on the front and back surfaces of the face plate, and any mounting tool that can be inserted horizontally from the side end surface of the face plate to the inside to attach the face plate to the frame side may be used.

Further, in the embodiment, the concrete form is composed of a steel frame and a synthetic resin face plate. However, the frame can be made of wood or synthetic resin, and the face plate can be made of wood. Alternatively, steel can be used. Although the embodiment has been described with reference to a rectangular concrete form, the present invention can be applied to a triangle, a pentagon and other polygonal concrete forms.

[0047]

According to the present invention, since the face plate has no holes such as screw holes on both the front and back surfaces, and no nail holes remain, the front and back surfaces of the face plate are used as concrete casting surfaces. Can be used. Therefore, when one surface of the face plate is damaged, it can be used in reverse. Further, in the case of forming an uneven pattern surface without forming the face plate as a mere smooth surface, if the front and back surfaces are made different, two types of uneven patterns can be selected.

Further, the mounting of the face plate to the frame can be performed by a simple operation of placing the face plate on the receiving material of the frame and inserting the mounting tool from the side, and the mounting tool can be easily removed. Is good. In addition, since the face plate can be freely attached and detached, the face plate can be easily replaced when the face plate is damaged, and the frame can be reused.

When a polypropylene-based synthetic resin is used as the material of the face plate, a release agent is not required, and workability is also improved in this respect. Further, when foamed polypropylene or the like is used as the material of the face plate, the weight of the face plate is further reduced, and the weight of the concrete form is reduced. Therefore, the size of the mold can be increased.

When the receiving member is provided at an intermediate position of the height of the side plate of the frame, the periphery of the face plate is restrained by the side plate of the frame. Damage can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view of a concrete formwork according to one embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line AA of FIG.

FIG. 3 is an exploded perspective view of the concrete formwork.

4A is an enlarged view of a part a of FIG. 2, and FIG.
(C) is a view showing another embodiment of the guide portion.

5 is a view corresponding to FIGS. 4 (a) and 4 (b), and is a view of FIGS. 4 (a) and 4 (b), respectively, in a state before a fixture is inserted; FIG.

FIG. 6 is an exploded perspective view of the vicinity of a part a in FIG. 2;

FIG. 7A is a perspective view showing another embodiment of the fixture, and FIG. 7B is a side view of the same.

FIG. 8A is a perspective view showing still another embodiment of the attachment, and FIG. 8B is a side view showing the same.

FIG. 9A is a perspective view showing still another embodiment of the mounting fixture, and FIG. 9B is a side view showing the same.

FIG. 10A is a perspective view showing still another embodiment of the attachment, and FIG. 10B is a side view of the same.

FIG. 11 is a cross-sectional view of a portion similar to FIG. 4, showing still another embodiment of the mounting fixture.

FIG. 12 is a plan view showing a concrete formwork according to another embodiment of the present invention.

FIG. 13 is a perspective view of a face plate in the concrete formwork of FIG. 1;

FIG. 14 is an enlarged sectional view taken along line BB in FIG.

FIG. 15 is a cross-sectional view taken along line CC of a main part in FIG.

FIG. 16 shows yet another embodiment of the present invention, and is a cross-sectional view of a main part of a concrete formwork before a face plate is attached to a frame with a fixture.

FIG. 17 is a side view of FIG. 16;

FIG. 18 is a plan view of a partial cross section of FIG. 16, showing a state in which the mounting tool is being slightly pushed into the mounting hole.

FIG. 19 is a view showing a state where the mounting tool has been pushed into the mounting hole, following FIG. 18;

FIG. 20 is a view following FIG. 19, showing a state in which the pushed-in attachment is released and the attachment is set in the attachment hole.

FIG. 21 shows yet another embodiment of the present invention, and is a cross-sectional view of a main part of a concrete formwork before a face plate is attached to a frame with a fixture.

FIG. 22 is a side view of FIG. 21.

FIG. 23 is a plan view of a partial cross section of FIG. 21, showing a state in which the mounting tool is being slightly pushed into the mounting hole.

FIG. 24 is a view showing a state where the mounting tool is pushed into the mounting hole, following FIG. 23;

FIG. 25 is a view following FIG. 24, showing a state in which the pushed-in attachment is released and the attachment is set in the attachment hole.

FIG. 26 is a view for explaining a procedure for removing the fixture set as shown in FIG. 25;

FIG. 27 shows still another embodiment of the present invention, and is a cross-sectional view of a main part of a concrete form before a face plate is attached to a frame with a fixture.

FIG. 28 is a view showing a state where the mounting tool is pushed into the mounting hole, following FIG. 27;

FIG. 29 is a perspective view showing the state of FIG. 27;

FIG. 30 is a perspective view for explaining how to remove the fixture in the state of FIG. 28 with a screwdriver.

FIG. 31 is a sectional view of a concrete form exploded and shown, showing still another embodiment of the present invention.

FIG. 32 is a sectional view of the concrete formwork of FIG. 31 in an assembled state.

FIG. 33 is an enlarged view of a portion c in FIG. 32;

FIG. 34 is a cross-sectional view of a main part of a conventional concrete formwork.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete formwork 2, 2 'Receiving material 3 Side plate 4 Frame 5 Face plate 10, 25, 35 Fixture insertion hole 11, 26, 36, 46 Mounting hole 12, 29, 39, 49 Fixture 13 Upper part 14 Lower side Part 15 Guide part 20 Round bar (bar material) 27, 37 Arm part 37a Outward extension part 28, 38 Projection 42 Hollow member 42a Step part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Haruhiko Iwasaki 3-10-7 Iwamotocho, Chiyoda-ku, Tokyo Inside Nikken Metal Co., Ltd. (72) Inventor Yoshiyoshi Yonezawa 3-10-10 Iwamotocho, Chiyoda-ku, Tokyo No. 7 Inside Nikken Metal Co., Ltd. (72) Inventor Reiji Oshima 1-9-11-506 Ichikawa Ichikawa-shi, Chiba Design Co., Ltd. (72) Inventor Makoto Mita 1-9- Ichikawa, Ichikawa-shi, Chiba 11-506 Oshima Design Inc.

Claims (16)

[Claims] 1. A frame formed of a polygonal shape by peripheral side plates each having a horizontal receiving material inside, and a face plate mounted on the receiving material of the frame, wherein the face plate is:
A concrete formwork removably attached to the frame by a fixture horizontally inserted into the frame from a side end face thereof. 2. The concrete formwork according to claim 1, wherein said frame is made of steel plate and said face plate is made of synthetic resin. 3. The concrete formwork according to claim 1, wherein the receiving member is provided at an intermediate height position of the side plate. 4. The concrete formwork according to claim 1, wherein the receiving member is provided at an upper end position of a side plate. 5. The face plate, wherein a substantially U-shaped fitting made of an elastic material is horizontally pushed through a fitting insertion hole formed in the side plate, and an upper portion of the fitting is inserted horizontally from a side end face of the face plate. The lower part is disposed on the lower surface of the receiving member, so that the receiving member and the lower part of the face plate are elastically sandwiched between the upper and lower parts of the fixture and attached to the receiving member. 3. The concrete formwork according to 3. 6. The concrete formwork according to claim 5, wherein a mounting hole for inserting an upper portion of the U-shaped mounting tool is provided in a side end surface of the face plate. 7. The concrete formwork according to claim 5, wherein an upper portion of the U-shaped fitting has a pointed tip, and the pointed tip is pierced into a side end face of the face plate. . 8. The concrete formwork according to claim 5, wherein the U-shaped mounting member is formed by bending a leaf spring into a substantially U-shape. 9. The concrete formwork according to claim 8, wherein a downwardly inclined guide portion is formed at a distal end of a lower portion of the U-shaped fixture. 10. A cut-and-raised piece for engagement formed by making a cut in a U-shape with its front end left and raising the cut-in inner region in an upper portion of the U-shaped fitting. The concrete formwork according to claim 8, wherein 11. The concrete formwork according to claim 8, wherein a folded back piece for engagement, which is folded back from the top and inclined upward, is provided at a tip end of an upper portion of the U-shaped fixture. 12. The frame according to claim 3, wherein the face plate is horizontally attached to the side plate of the frame by a bar which penetrates horizontally through the inside of the face plate and has both ends detachably fitted into holes formed in the side plate. Concrete formwork. 13. The face plate has left and right arms that can be elastically expanded and contracted in a horizontal plane from a fitting insertion hole formed above a receiving member position of the side plate to a mounting hole provided in the face plate. 4. An armature having a substantially U-shape, and a fitting having a projection for engagement is inserted into the left and right outer portions of the arm, and is attached to the side plate of the frame by the projection for engagement. Concrete formwork. 14. The face plate is disposed on a lower surface of a receiving member by pressing a lower portion of a generally U-shaped fitting made of an elastic material horizontally from a fitting insertion hole formed in the side plate,
The upper part of the fixture is inserted horizontally from the side end face of the face plate into the inside, so that the receiving material and the lower part of the face plate are elastically sandwiched between the upper and lower parts of the fixture and attached to the receiving material. The concrete formwork according to claim 4, characterized in that: 15. A lower portion of the U-shaped fixture extends inward from the receiving member, and an upward projection is provided at a distal end side of the lower portion to abut against an inner edge of the receiving member to perform a retaining function. 9. The concrete formwork according to claim 8, wherein: 16. The concrete formwork according to claim 1, wherein the face plate has a structure in which polypropylene sheets are attached to both sides of foamed polypropylene.