JPS6346594Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a formwork used to form underfloor ventilation holes in a building foundation.

Generally, in order to construct a cloth foundation, that is, a foundation with a ⊥-shaped cross section consisting of a footin and a rising part, on site, ready-mixed concrete is poured into the root cut groove to form a footin, and on top of this footin, Formwork plates are assembled at predetermined intervals, and then ready-mixed concrete is placed between these formwork plates to form the rising portion integrally with the footing. On the other hand, when forming an underfloor ventilation hole in the above-mentioned rising part, a part of the space between the above-mentioned formwork plates is enclosed and the formwork is attached to the formwork plates, and then the formwork outside the above-mentioned formwork is installed. Fresh concrete is poured between the plates to form a rising section, and the space within the formwork is used as an underfloor ventilation hole.

By the way, the formwork for forming the underfloor ventilation holes attached to the above formwork plate has conventionally been generally box-shaped or U-shaped, made of steel or wood, in order to withstand the pressure associated with pouring fresh concrete. It has a three-dimensional shape, has a certain volume, and is heavy.
Because there are so many of them, it takes time and effort to transport them to the site, and to store and transport them at the site, and they also require a storage space even after use, making them time-consuming to transport.

This idea was made in view of the above circumstances,
It is lightweight and easy to transport, can be disassembled for easy storage, and is inexpensive to manufacture.
Furthermore, it is an object of the present invention to provide a formwork for forming underfloor ventilation holes in a building foundation, which is also disposable.

This invention will be explained below with reference to the drawings.

Figures 1 to 4 show an embodiment of this invention, and the formwork A has a U-shaped front surface formed by raising side plates 1b at both ends of a bottom plate 1a (both ends in Figure 1). The main body 1 and the top plate 2a positioned horizontally.
Support face plates 2b, 2b are provided on the front and back sides of the
is formed into a lateral shape by hanging down, and the opening surfaces on both sides and the opening surface on the bottom side are respectively the side plates 1 of the main body 1.
b, 1b's opposing surfaces and the bottom plate 1a
The supporting portion 2 is closed inside the upper surface of the main body 1 and comes into contact with the main body 1 to prevent the side plates 1b, 1b from bending toward each other.

First slits 1c, 1c are formed at the upper widthwise center of the side plates 1b, 1b of the main body 1, respectively;
On both sides of the center part in the depth direction of the upper surface plate 2a of the support part 2, second slits 1c, 1c are provided so as to be continuous with the first slits 1c, 1c.
Slits 2c, 2c are formed, and each of these slits has a third slit 3a at the center of the lower part.
The vertically long rectangular connecting face plates 3, 3 each have a central portion in the width direction connected to the first slit 1c, one end of the central portion connected to the second slit 2c, and a third slit 3a connected to the first slit 1c. The center portions of the side plates 1b below 1c are removably fitted into each other, and the support portion 2 is connected to the main body 1 by these connecting face plates 3,3.

On the other hand, the support face plate 2b on the bottom plate 1a side of the main body 1,
2b, a fourth slit 2d facing perpendicularly to the bottom plate 1a is provided at a predetermined interval in the width direction of the support part 2 with both side plates 1b of the main body 1 on both sides.
Individually formed. Then, the fourth slit 2
Three first reinforcing face plates 5 having fifth slits 5a, 5a formed in the upper part of each of the three pairs of fourth slits 2d facing each other among the fifth slits 5a, d...
are removably fitted into each of the fourth slits 2d, and inserted with the bottom of the first reinforcing face plate 5 in contact with the bottom plate 1a of the main body 1. Each of these first reinforcing face plates 5
is for reinforcing each of the supporting face plates 2b, 2b. Furthermore, sixth slits 1e are formed in the center portions of the end faces of the support face plates 2b, 2b in contact with the side plates 1b, 1b of the main body 1, and the support face plates 2b,
On both sides of 2b, seventh slits 6a, 6 are provided at one end.
A second reinforcing face plate 6 having eighth slits 6b formed at the other end thereof has seventh slits 6a, 6a removably fitted into the sixth slits 1e, 1e, and an eighth slit 6b. A portion of the connecting face plate 3 is removably fitted to each other.

In addition, in the figure, 7 indicates a side plate 1 on one side of the connecting face plates 3, 3 protruding outward from the side plates 1b, 1b of the main body 1.
This is a reinforcing face plate bonded in contact with b and 1b.

Furthermore, each of the face plates 1a, 1b, 2a, 2b,
3, 5, 6, and 7 are all two plates B and C made of resin such as polypropylene that are opposed in parallel, and a plurality of connecting plates D made of resin such as polypropylene that are in contact with these plates B and C at almost right angles. As shown in FIG. 3, they are integrally connected.

4, 8 and 9 respectively indicate the inner formwork plate and the outer formwork plate for forming the rising part of the foundation, and the surface of the outer formwork plate 9 on the inner formwork plate 8 side is an uneven surface. 9a, and when ready-mixed concrete is poured between both formwork plates 8 and 9 to form the rising part of the foundation, an uneven pattern will be formed on the outside surface of this rising part (the outside surface of the building). It's starting to get easier. Incidentally, on one side of the bottom plate 1a of the main body 1, an uneven part 1f is formed to fit into the uneven surface 9a of the outer formwork plate 9, and when this uneven part 1f is fitted to the uneven surface 9a, the formwork is formed. A can be inserted between the two formwork plates 8 and 9.

Next, the operation of this device configured as described above will be explained.

The formwork A is used by being installed between the inner formwork plate 8 and the outer formwork plate 9 as shown by the two-dot chain line in FIG. 4 in the same way as the conventional formwork. At this time, main body 1
The uneven portion 1f is the uneven surface 9a of the outer formwork plate 9.
to fit. Next, as in the conventional method, fresh concrete is placed between the inner formwork plate 8 and the outer formwork plate 9 and cured to form the rising part of the foundation. When pouring fresh concrete, formwork A prevents the fresh concrete from entering into the area surrounded by the two-dot chain line in Figure 4, and removes formwork A from the foundation after the fresh concrete hardens. Under-floor ventilation holes will be created.

By the way, considerable pressure is applied to the formwork A during pouring of the above-mentioned fresh concrete, but the side plate 1 of the main body 1
b, 1b are supported by the upper surface plate 2a and the supporting face plate 2b, and the supporting face plates 2b, 2b are supported by the reinforcing face plates 5, 6.
The top plate 2a and the supporting face plate 2b are in contact with each surface of the main body at an appropriate right angle, and the reinforcing face plates 5 and 6 are in contact with the supporting face plates 2b and 2b at a right angle, so that the reinforcement is sufficient. Therefore, it can withstand the above pressure sufficiently.

Moreover, when the formwork A is disassembled after use as shown in FIG. 2, all of the parts become plate-shaped and can be packed compactly, making transportation and storage easy. Furthermore, each slit 1c, 1d, 1e, 2c, 3a, 5a, 6a, 6 is assembled after disassembly.
This is easy because it is completed by simply fitting the face plates 3, 5, and 6 into b. Formwork A is made of resin and can be disassembled and made compact after use, making it disposable.In this case, there is no need to store or clean it after use, which saves the trouble of maintenance after use. . On the other hand, each face plate 1a, 1b,
2a, 2b, 3, 5, 6, and 7 are all made of resin, and there are many hollow parts inside, so formwork A is lighter and cheaper than conventional formwork, and is easier to transport. .

In addition, each face plate 1a, 1b, 2a, 2b, 3,
Items 5, 6, and 7 can be produced in large quantities at a time by die-cutting in a factory or the like, and only the required amount can be easily transported to each site along with other building materials.

In addition, when assembling formwork A, each face plate 1
a, 1b, 2a, 2b, 3, 5, 6, and 7 may be fixed to each other with duct tape or the like, and it is preferable that the formwork A is fixed to the formwork plate with duct tape or the like. Also, formwork A can be easily removed from the foundation because formwork A is flexible, but it is desirable to apply a release agent to formwork A to make removal from the foundation even easier. .

Furthermore, when a mold is used for a mold plate having a planar uneven surface 9a, the uneven portion 1f of the main body 1 is omitted. Furthermore, if the foundation is produced in a factory, formwork A will be used in the factory. Furthermore, the connecting face plate 3 is omitted and the connecting face plate 3 is attached to the support part 2.
Attach a joint face plate (not shown) to replace the
The support portion 2 may be fitted into the main body 1 using this joint face plate.

As explained above, this invention consists of a main body with side plates connected to both ends of a bottom plate, a support plate that prevents bending of the main body, and a support part that is removably fitted into a slit formed in the main body. and a reinforcing face plate that is removably fitted into slits formed in the support part to reinforce the support part, so it can be easily assembled and disassembled by simply attaching and removing each face plate to each slit, and when disassembled, it takes up less space. It can be easily stored without removing it, and it is also easy to transport. Furthermore, if the main body, the support portion, and the reinforcing face plate are made of a resin material, they can be manufactured at low cost, and because of the low cost, they can be disposable.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
2 is a partially exploded perspective view, FIG. 3 is an enlarged perspective view of portion E in FIG. 2, and FIG. 4 is a perspective view for explaining the state of use. A... Formwork, B, C... Board material, D... Joining plate,
1...Main body, 1a...Bottom plate, 1b...Side plate,
1c...first slit, 1e...sixth slit,
2...Support part, 2a...Top plate, 2b...Support face plate, 2c...Second slit, 2d...Fourth slit, 3a...Third slit, 5...First reinforcing face plate, 5a... 5th slit, 6...second reinforcing face plate, 6a...7th slit, 6b...8th slit.

Claims (1)

[Claims for Utility Model Registration] 1. A main body 1 having side plates 1b connected to both ends of a bottom plate 1a, a top plate 2a and two support plates 2b hanging on both sides thereof, and A support part 2 that prevents the face plates 1b from bending in a direction in which they approach each other, and each support face plate 2b of the support part 2.
It consists of a reinforcing face plate 5 which is installed on the upper face plate 2a and the supporting face plate 2 to prevent bending of each supporting face plate 2b.
Both ends of b are in contact with the inside of the both side plates 1b, and the lower end of the support plate 2b is in contact with the bottom plate 1a.
The supporting portion 2 is in contact with the upper surface of the upper surface plate 2.
A structure characterized in that the connecting face plate 3 is fitted into the slits 2c formed at both ends of the main body 1 and the slit 1c formed at the upper part of the side plate 1b of the main body 1 to be detachably connected to the main body 1. Formwork for forming ventilation holes under the floor of the foundation. 2. The main body 1, the support part 2, and the reinforcing face plate 5 are formed by combining two resin plates facing each other in parallel with each other by a plurality of resin bonding plates that are in contact with these plates at approximately right angles. A formwork for forming ventilation holes under the floor of a building foundation as set forth in claim 1 of the utility model registration, characterized by: