JPS627803Y2 - - Google Patents

Description

[Detailed explanation of the idea] Formwork for concrete can be used for flat slabs or for three-dimensional walls, but especially in the latter case, the plywood of the formwork is attached in front to the beams that support the plywood. It needs to be installed. The present invention provides a formwork that is particularly suitable for wall surfaces.

The details of the embodiments will be explained below with reference to the drawings. Figure 1 is a front view of the formwork of the present invention, Figure 2
The figure is a sectional view from the arrow direction to the side, and FIG. 3 is an enlarged perspective view of the end of the beam material. FIG. 4 is a perspective view of the end rubber gasket. In Fig. 1 and Fig. 2, 1 is a water-resistant plywood board that serves as a holding surface for the concrete, which becomes a slab surface or a wall surface in the case of concrete pouring. The plywood 1 has rectangular tubes 2 made of aluminum alloy that are arranged in parallel at regular intervals and are fixed to the plywood 1 through rubber packings 3 as support beams. In the embodiment, a rectangular tube with a four-sided cross section is used. The rubber seal 3 shown in FIG. 4 has a base 4 that is a square column whose diameter is equal to the inner diameter of the hollow part of the aluminum alloy square tube, and a head 5 that is the same size as the outer diameter of the square tube 2. The base 4 and the head 5 are integrated. This is a stepped square pillar made of rubber that can cover the thick end of the square tube 2, with a stepped portion 5c in which the head 5 protrudes from the base. A nail fixing hole 6 for fitting a nail 7 is formed perpendicularly to the outer surface 5a of the head. Next, to assemble the formwork, first insert the base 4 of the rubber packing 3 from the end of the aluminum square tube, fit the packing 3 to both ends of the square tube 2, and then secure the packing 3 with nails. By using the hole 6, the rectangular tube 2 is fixed to the plywood 1 via the packing 3. Once both ends of the rectangular tube 2 are completely fixed to the plywood, the plywood 1 and the rectangular tube 2 are integrally combined, and the rectangular tube 2 has rigidity, so it will not come off at all. Then, a plurality of beams, that is, aluminum rectangular tubes 2 are attached to the plywood in parallel to each other at appropriate intervals depending on the concrete load, and the assembly as a formwork is completed. In this case, it is preferable that the end surface 5b of the head 5 of the rubber gasket 3 protrudes slightly from the edge of the plywood 1.

The formwork of the present invention as explained above prevents concrete from accidentally flowing in from the hollow open end of the beam, that is, the aluminum alloy rectangular tube, when the formwork is being handled or if the formwork falls. The presence of rubber gaskets 3 on the parts alleviates damage to the edges of the plywood, and at the same time absorbs sound caused by falling impact, contributing to an improvement in the working environment. Further, since the plywood 1 and the aluminum rectangular tube are fixed together through the rubber gasket 3, the nails can be easily removed by utilizing the elasticity of the rubber, so that it can withstand repeated use as a beam and is useful for saving resources. Although the embodiment has been explained using a square tube, it is also possible to use a rectangular tube to improve the strength. The base of the rubber seal 3 may be rounded at the tip to facilitate insertion, or may have serrated protrusions 8 on the surface to strengthen the fit and facilitate insertion. You can also attach it.
Figures 5A and 5B show different embodiments of the rubber gasket.

[Brief explanation of the drawing]

Figure 1 is a front view of the formwork of the present invention, Figure 2 is a side cross-sectional view of Figure 1, and Figure 3 is a beam (square tube).
FIG. 4 is a perspective view of the rubber packing, and FIGS. 5A and 5B are sectional views of different embodiments of the rubber packing. 1...Waterproof plywood, 2...Aluminum alloy square tube, 3...Rubber packing, 4...Base, 5...
Head, 6...nail fixing hole, 7...nail, 8...serrated ridge.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of rectangular tubes made of aluminum alloy are arranged at regular intervals at the upper and lower ends, the base is internally fitted into the rectangular tube, and the head is connected to the rectangular tube. A concrete formwork in which water-resistant plywood is nailed into the nailing hole provided on the side of the head of a rubber gasket that is flush with the outside surface of the concrete formwork. (2) The concrete formwork according to claim (1) of the utility model registration, in which the outer surface of the base of the rubber packing is serrated.