JPH021391Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Purpose of the invention (industrial application field) This invention relates to an improvement of a table-shaped formwork for constructing a Watsuful slab made of rigid synthetic resin foam.

(Prior Art) A Watsuful slab is a slab with a structure in which concave patterns are regularly arranged in the lower part of a ceiling slab, and when viewed from below, it looks like a rhombus or a beehive. However, the horizontal cross-sectional shape of one recessed portion is not limited to a quadrangular or hexagonal shape, but may also be circular or the like.

Conventionally, such Watsuful slabs were formed by placing a table-shaped formwork made of plywood on top of the flat plate formwork, pouring concrete, and then removing the flat plate formwork and the table-like formwork, but recently From the viewpoint of machinability, a platform made of hard synthetic resin foam is used as the platform formwork.

In that case, the problem is the release of the platform formwork from the slab after the concrete has hardened. If the formwork was damaged, it could not be reused.

To counter this problem, a release paint is applied to the surface of the tabletop formwork that comes in contact with the slab, and a release layer is provided when forming the tabletop formwork, but sufficient effects have not been achieved. is the current situation.

(Problem that the invention attempts to solve) This invention was created in view of the above circumstances.
It is an object of the present invention to provide a platform formwork configured so that it can be easily removed from a slab.

(b) Structure of the device In this device, a releasing object can be supplied between the slab and the platform form when the platform form is released from the slab. is a platform made of hard synthetic resin foam.
A supply pipe for the mold release object is attached to communicate the bottom surface and the top surface, and a spacer is attached to the end of the supply pipe located on the top surface side of the platform so that the inside communicates with the supply pipe. This is a table-shaped formwork for constructing Watsuful slabs with a mold bag attached.

(Example) Examples of this invention will be described in detail below with reference to the drawings, but this invention is not limited to the following examples.

FIGS. 1 and 2 show the configuration of the top surface 2 and bottom surface 3 of the table-shaped formwork 1 for constructing a Watsuful slab of this invention.

The table-shaped formwork 1 is made of a hard synthetic resin foam such as polyolefin resin, and the top surface 2 is formed smaller than the bottom surface 3, making the entire table-shaped body, and the bottom surface 3 is further provided with a recess 4. ing. The surface of the inclined surface 5 around the trapezoidal formwork 1 is treated with FRP and provided with a release layer.

Further, as shown in FIGS. 3 and subsequent figures, a mold release object supply pipe 6 is installed in the platform frame 1 so as to communicate the center of the bottom surface 3 located in the recess 4 with the center of the top surface 2. attached. The supply pipe 6 may be made of metal or synthetic resin, and is inserted and attached to a communication hole provided in the platform frame 1 in advance. And the bottom surface 3 and the top surface 2 in the recess 4
At this point, the respective ends 7 and 8 of the supply pipe 6 protrude, and a release bag 9 made of polyethylene is placed at the end 8 protruding toward the top surface 2, and the inside thereof communicates with the inside of the supply pipe 6. is attached to. The planar shape of the bag 9 is approximately equal to the shape of the top surface 2 of the trapezoidal formwork 1.

Below, we will explain the process of releasing the mold from the slab when using the table-shaped formwork of this invention.

FIG. 3 shows a state in which concrete is poured to form a slab 10, and reference numeral 11 denotes a flat plate form made of plywood, and the flat plate form 11 is removed after the concrete has solidified. Then, as shown in FIG. 4, the bottom surface 3 of the supply pipe 6
Connect the end of the pipe 13 of the air compressor 12 to the end 7 protruding from the air compressor 1.
2, air, which is a releasing object, is sent into the bag body 9 through the supply pipe 6. As air is introduced, the bag body 9 expands and increases its thickness, and as shown in FIG.
0, the trapezoidal formwork 1 is released from the mold. If the mold release is not sufficient at this time, one end of the puller 14 may be engaged with the end 7 of the supply pipe 6 to pull it down, as shown in FIG.

If we use a platform formwork 1 with a side length of the bottom surface 3 of 910 mm, a side length of the top surface 2 of 710 mm, and a height of 270 mm, the compressed air pressure by the air compressor 12 will be 7 kg. / ^cm2 may be sufficient. When using the same shape as the above-mentioned trapezoidal formwork 1 and using water as a releasing object,
The water pressure may be approximately 2 kg/cm ² .

The supply pipe 6 and the bag 9 may be attached to the platform frame 1 immediately after the platform frame 1 is formed, or may be carried out at the site of use.

(c) Effects of the invention This invention is constructed as described above, and is capable of constructing a Watsuful slab in which the mold can be easily released from the slab by feeding a releasing object into the bag through the supply pipe. It is a trapezoidal formwork, which is less likely to be damaged during mold release, can be reused, and is advantageous in terms of cost.

[Brief explanation of the drawing]

Figure 1 is an embodiment perspective view showing the top side of the Watsuful slab construction platform formwork of this invention, Figure 2 is an embodiment perspective view showing the bottom side, and Figure 3 is the platform formwork of this invention. Fig. 4 is a configuration diagram showing the state in which the air compressor pipe is connected to the end of the supply pipe in Fig. 3; FIG. 6 is a longitudinal cross-sectional view when air is supplied into the bag, and is a configuration diagram showing a state in which a pulling tool is connected to the end of the supply pipe. 1... Table-shaped formwork for constructing Watsuful slab, 2...
Top surface, 3... Bottom surface, 6... Supply pipe for mold release object, 9... Bag body.

Claims (1)

[Scope of utility model registration request] A table-shaped body made of hard synthetic resin foam, with a supply pipe for a mold release object attached to the bottom and top surfaces of the table-shaped body in communication with each other, and an end of the supply pipe located on the top side of the table-shaped body. A table-shaped formwork for constructing a Watsuful slab, in which a release bag is attached to the part so that the inside communicates with the supply pipe body.