JPS6212739Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a concrete slab opening support tool used for forming an opening in the slab of a concrete structure.

Conventionally, when installing vertical piping through a concrete slab, or when moving a standard black mark on a lower floor to an upper floor, etc., methods for forming slab openings include:
A method is used in which a paper tube is fixed at an appropriate position on a slab formwork, and after concrete is poured and cured, the paper tube is peeled from the concrete slab to form an opening.

However, in this case, when closing the opening, the concrete is poured from the lower floor and supported by supports, etc., and the opening is filled with concrete from the upper floor to close it, making the work difficult and inefficient.

This invention was devised in view of the conventional problems as described above, and the purpose is to provide a concrete slab opening support that has a simple structure and is excellent in workability.

The configuration of this invention will be explained below based on drawings of embodiments.

FIG. 1 is a partially cutaway perspective view of a support body according to a first embodiment of the present invention. It has flanges 5 protruding in different directions,
Molded integrally with synthetic resin, etc.

FIG. 2 is a partially cutaway perspective view of a closure plate according to the first embodiment of the invention, in which the closure plate 6 has a step that fits into the inner peripheral surface of the support body 1 and engages with the inward flange 5. It has a bottomed outer edge 7 and is integrally molded from synthetic resin or the like.

As shown in FIG. 3, the supporting device of this invention having the above structure has the supporting device main body 1 nailed N to the slab formwork P from the projecting piece 4 at a predetermined position on the slab formwork P, as shown in FIG. A paper sleeve S is fitted into the inner circumferential surface of the support main body 1 and locked by the inward flange 5, and concrete is poured around it for curing.

At this time, if a closing plate 6 is fitted to the upper end of the paper sleeve S, infiltration of concrete and the like can be prevented. Next, as shown in FIG. 4, the slab formwork P is dismantled, and the reference ink on the lower floor is transferred to the upper floor using the opening A of the slab penetrated by this. When closing the opening A, the paper sleeve S is removed, and the closing plate 6 is inserted into the inner peripheral surface of the support main body 1 from the upper surface of the slab and engaged with the inward flange 5 to close it. Concrete C can be filled inside and processed reliably.

If the slab formwork where the support is attached has holes, the reference ink can be transferred before the slab formwork is dismantled.

Next, an example of this invention will be described.

A support main body 21 according to a second embodiment of this invention shown in FIG. 5 has a cylindrical portion 24a having nail holes 23 in a protrusion 24 on the outer circumferential surface extended to the lower end. The support main body 21 has good stability when nailing, and since it serves as a guide for the nail, it has excellent workability. A third embodiment of the invention shown in FIG.
The inside of the slab is densely filled with mortar 36a, etc. to form a disk shape, and when the support body is closed and used, the mortar bottom surface is exposed, so the bottom surface of the slab can be exposed for good looks and efficiency. It also has good adhesion when finishing with mortar or spray painting, and has a remarkable effect on improving quality.

The closing plate 46 according to the fourth embodiment of this invention shown in FIG. By intervening and closing the area around the slab, there is an effect that construction from the top surface of the slab can be easily and reliably performed even when there is a vertical pipe.

As explained in detail above, according to this invention, it is possible to reliably and easily support the paper sleeve that forms the opening, and the opening can be easily and reliably closed from the top surface of the slab. This makes it possible to obtain a concrete slab opening support with excellent properties.

[Brief explanation of the drawing]

Figures 1 and 2 are partially cutaway perspective views of the first embodiment of this invention, Figures 3 and 4 are central vertical sectional views of the device in use, and Figure 5 is a support of the second embodiment. FIG. 6 is a central vertical sectional view of the closing plate of the third embodiment, FIG. 7 is a perspective view of the fourth embodiment, and FIG. 8 is a diagram showing its use. 1... Support body, 4... Protruding piece, 5... Inward flange, 6... Closure plate, P... Slab formwork, S
...Paper sleeve.

Claims (1)

[Scope of utility model registration request] A concrete slab opening support consisting of a support body having a protruding piece with several nail holes on the cylindrical outer circumference and an inward flange on the lower inner surface, and a closing plate that engages with the inward flange. Ingredients.