JPH0116801Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a formwork that maintains sufficient strength and has a simple surface finish when pouring concrete.

(Conventional Formwork) In the conventional formwork shown in FIG. 1, frame plates 3 and 4 are firmly fixed on both sides of reinforcing bars 1 and 2 with bolts 5.

Then, concrete 6 is poured between the frame plates 3 and 4 as described above, but in this conventional formwork, when the frame plates 3 and 4 are thin or when the number of bolts 5 is small, etc. , the following inconveniences occurred.

That is, between the frame plates 3 and 4 made as above,
When concrete was poured, the frame plates 3 and 4 would bulge outward due to the lateral pressure acting on the frame plates, and in the worst case, there was a risk that the frame plates themselves would be damaged.

For this reason, in conventional formwork, the frame plates 3 and 4
However, there was also the drawback that the surface could only be finished after the concrete had been poured.

(Purpose of this invention) This invention prevents outward bulge due to lateral pressure even when concrete is poured, and
The purpose is to provide a concrete formwork that can be surface-finished even before concrete is poured.

(Embodiment of the present invention) In the embodiment shown in FIG. 2, nets 10 and 11 are stretched over the tops 8 and 9 of a corrugated iron main truss 7, and a predetermined distance is set between these nets 10 and 11. Maintains spacing. A reinforcing bar 12 is provided on the side surface of the main truss 7.

Iron auxiliary trusses 13 and 14 are provided on the outside of the nets 10 and 11 as described above, and an auxiliary net 1 is provided on the outer tops of these auxiliary trusses 13 and 14.
5, 16 are stretched, and these auxiliary nets and the above nets 10,
A gap is formed between 11 and 11.

Decorative plates 17 and 18 are provided directly on the outside of the auxiliary nets 15 and 16.

Concrete is then poured between the opposing parts of the nets 10 and 11, and this concrete is
The auxiliary net 15,
There is almost no leakage to the 16th side. Even if it leaks, the amount will be very small.

In this way, since the amount of concrete flowing out from the nets 10 and 11 is very small, the lateral pressure during pouring acts on the nets 10 and 11, and the auxiliary nets 15 and 16
has almost no effect.

Therefore, the decorative plates 17 and 18 provided directly on the auxiliary nets 15 and 16 are not affected by the lateral pressure of the concrete at all. Since lateral pressure does not act on the decorative board,
Even if concrete is poured between the nets 10 and 11, the decorative board will not bulge outward or be damaged.

In this embodiment, the decorative boards 17 and 18 are directly provided on the auxiliary nets 15 and 16, but the surfaces of the auxiliary nets 15 and 16 may be plastered without providing these decorative boards.

This plastering may be performed after concrete is placed between the nets 10 and 11, or the plastering may be completed in advance before concrete is placed. This is because even if concrete is poured after plastering, the lateral pressure will not act on the finished surface and will not damage the finished surface.

The structure completed as described above includes the net 10,
11 and the auxiliary networks 15, 16, there are spaces 19, 2
0 is formed. These spaces 19 and 20 function as a heat insulating layer even if left as they are, but in order to further enhance their heat insulating function, the spaces 19 and 20 are
9 and 20 can be filled with a heat insulating material.

When filling the above-mentioned heat insulating material, for example, the following procedure is performed.

That is, as shown in FIG. 2, the space 19,
At the lower end of 20, an injection pipe 21 is provided. Then, an injection amount detection pipe 22 is provided above this space.

Thus, when expanded polystyrene is injected from the injection pipe 21, the expanded polystyrene rises within the spaces 19 and 20. When this Styrofoam flows out from the injection amount detection pipe 22, the space is completely filled.

(Configuration of the present invention) The configuration of the present invention is characterized in that a pair of nets are stretched over the top of an iron truss, and an auxiliary net is provided outside of the nets.

With the above configuration, even if concrete is poured between the opposing portions of the net, the lateral pressure will not act on the auxiliary net.

(Effects of the present invention) With this invention, even when concrete is poured, the lateral pressure does not act on the auxiliary net, so even if the decorative board is directly installed on the auxiliary net, the lateral pressure will cause the decorative board to There will be no more damage. Furthermore, even if the auxiliary net is surface-finished, the finished surface will not be damaged.

In addition, the above-mentioned surface finishing can be applied in advance before concrete is poured, and then concrete can be poured.

Therefore, there is no need to determine the order of concrete placement and surface finishing. In this way, since the order of work does not matter, it becomes easier to manage the schedule of the work.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional device, and FIG. 2 is a sectional view showing an embodiment of this invention. 7... Main truss, 8, 9... Top, 10, 11
... Net, 15, 16... Auxiliary net.

Claims (1)

[Scope of utility model registration request] Kokunrito formwork consists of a pair of nets stretched over the top of a main iron truss, and an auxiliary net placed outside of these nets.