JPS5922180Y2 - Concrete formwork spacing device - Google Patents

Description

[Detailed description of the invention] This invention aims to rationalize and save labor in formwork work in so-called narrow areas when constructing concrete walls adjacent to existing buildings, and to improve concrete construction to ensure appropriate waterproofing. This invention relates to a formwork spacing device.

Below, the embodiments of the device of the present invention will be explained with reference to the drawings.
In the figures and FIGS. 3A and 3B, 1 is a cladding pipe interposed between an outer formwork and an inner formwork adjacent to an existing building, 2 is a separator inserted inside this cladding pipe, and 3 is a cladding pipe 1.
A resilient thin film portion 3 that closes the end of the cladding tube 1 on one cylindrical end surface with a cap made of synthetic resin or the like fitted to one end.
a, and a water stop flange 3b is provided on the outer periphery.

Next, when using the device of the present invention having the above structure, as shown in FIGS. 4 and 5, reinforcing crosspieces B and B are attached to the outer formwork P adjacent to the existing building A, and B,
B is connected by a connecting metal fitting C and reinforced after assembly, and one end of the separator 2 is passed through the outer formwork to connect the connecting metal fitting C.
and insert the cladding tube 1 outside the separator 2 so as to pierce the thin film part 3a from the cap 3 side.
Insert it all the way to the inner surface.

Then, the inner formwork P1 is assembled, and the tightening rod E is screwed onto the other end of the separator 2 to connect it to the outer formwork P, which is further tightened with a tightening fitting via buffing material, and concrete is poured.

After curing, the inner formwork P1 is dismantled, the separator 2 is unscrewed from the connecting fitting C of the outer formwork P, and is removed from the cladding tube 1.

Therefore, if the outer formwork P is peeled off from the concrete wall surface, it can be lifted to the next floor.

At this time, the thin film portion 3a of the cap 3 that has been pierced once pulls out the separator 2 inside, and then returns to its original state due to its elasticity and narrows, thereby closing the opening of the cladding tube 1.

For this reason, a caulking agent, waterproof mortar G, etc. is injected from the inside up to the position of the cap 3 to perform waterproofing.

In addition, in the device of the present invention, it is also possible to enhance the water-stopping effect by press-fitting a well-known disk-shaped waterstop plate onto the outer periphery of the cladding tube 1.

According to the device of the present invention, when constructing a concrete wall adjacent to an existing building, it is possible not only to save construction work by reusing the outer formwork, but also to save on construction work, especially for the outside of the cladding pipe after the separator has been removed. Since the end can be closed by the elasticity of the thin film part of the cap, when caulking agent, waterproof mortar, etc. are injected into the acid inside the cladding tube, it is possible to prevent the acid from flowing out to the outside and ensure reliable filling. This is a useful idea because the water-stop flange can properly waterproof the inner and outer surfaces of the cladding tube.

Furthermore, the device of the present invention has a simple structure, so it is easy to install and is extremely convenient in practice.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the cladding tube according to the device of the present invention, Fig. 2 is a perspective view of the separator, Fig. 3 is a partially cutaway front view of the cladding tube, and Figs. 4 and 5 are used by the device of the present invention. It is a partial sectional view of the state. 1... Cladding tube, 2... Separator,
3...Cap, P...Outer formwork, P
L...Inner formwork, C...Connection fittings, E
......Tightening metal fittings.

Claims (1)

[Scope of utility model registration request] A cladding tube that is made up of a cladding tube interposed between an outer formwork and an inner formwork, and a separator that is inserted inside the cladding tube and connects the formworks on both sides, and that comes into contact with the inner surface of the outer formwork. 1. A concrete form spacing maintaining device, characterized in that a thin film portion is formed on one end surface of a cylindrical shape, and a cap is fitted on the outer periphery with a water-stop flange.