JPH024201Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a sleeve material used for forming openings such as through holes in the construction of reinforced concrete walls and beams.

<Background of the invention> Conventionally, in reinforced concrete construction, when openings such as through holes are formed in walls and beams,
Paper tubes of a length corresponding to the wall thickness to be formed are attached between the temporary frames, and concrete is poured.

However, since this type of paper tube is bulky, it poses problems in inventory management and transportation to the construction site.In particular, during construction, the new seismic law requires more reinforcing bars in the temporary frame than before, making it difficult to connect narrow reinforcing bars. Not only is it extremely difficult to insert a paper tube in the correct position, but even if it were possible to do so, there are many problems, such as the long time it takes to remove the paper tube after the concrete hardens. Ta.

<Purpose of the invention> The purpose of the invention is to provide a novel sleeve material for opening forming in concrete wall construction, which has an extremely simple configuration, solves the above problems, and can simplify inventory management and construction. purpose.

<Structure and Effects of the Invention> In order to achieve the above object, the present invention includes an end plate fixed to the inner surface of the temporary frame, a reinforcing rib bent into a cylindrical shape along the outer periphery of the end plate, and a cutting line. A sleeve material for opening molding was constructed from the provided deployable tube material and adhesive tape connecting the corresponding sides of the tube body.

According to the above configuration, the present invention is easy to manufacture and suitable for mass production, and also because it is possible to stack a large number of products, it is not bulky and easy to handle in inventory and transportation.

Moreover, during construction, in this invention, the end plate is fixed in a fixed position on the inner surface of the temporary frame in advance, and the cylindrical material is inserted between the temporary frames by passing through the narrow space between the reinforcing bars, and the outer periphery of the end plate is fixed. After winding it into a cylindrical shape along the curve, the abutting sides are attached and connected with adhesive tape to form a sleeve material, which improves the accuracy of the mounting work and positioning on the temporary frame. In addition, after the concrete has hardened, the sleeve material can be easily destroyed by cutting lines, achieving the intended purpose.

<Description of Examples> The sleeve material for forming an opening in a concrete wall of the present invention is made of, for example, corrugated paper or other flexible material whose surface is waterproofed,
Thick end plates 2, 20 having an outer diameter approximately equal to the diameter of the opening to be formed and fixed to the inner surfaces of temporary frames 5a, 5b placed opposite each other according to the concrete thickness; one side is cut equal to the outer circumference length of the end plates 2, 20, and the other side is cut equal to the temporary frame interval, and inserted between the reinforcing bars in a paper board shape,
A deployable tube material 3 is bent into a cylindrical shape along the outer periphery of the end plates 2, 20, and an abutting piece attached to one side of the deployable tube material 3 is attached to one side of the abutting piece of the expandable tube material 3, so that when this is bent into a cylindrical shape, the corresponding abutting side It is composed of an adhesive tape 4 that adheres to. In the figure, the release paper is for protecting the adhesive surface 41 of the tape 4.

The tube material 3 has a plurality of reinforcing ribs 31 as shown in FIG. 6 on its inner surface, and a cutting line 32 consisting of a pair of perforations. Its width, height, etc. are set so that when bent into a cylindrical shape, its tip abuts against an adjacent rib, as shown in FIG. In the case of this embodiment, the shape of the reinforcing rib is formed to have a rectangular cross section, but the present invention is not limited to this and can be set to any shape.

In the embodiment shown in FIG.
A strip-shaped adhesive tape 4, which is slightly longer than the tube member 3, is disposed in a row opposite to the adhesive surface 41, and the adhesive surface 41 is protected with a release paper 42 as in the previous example.

Incidentally, dimension lines 33 are displayed on the outer surface of the expandable tube material 3 at intervals of, for example, 5 cm in the length direction of the tube, and the beam is cut along the dimension lines 33 according to the beam thickness. Cutting can be easily done with scissors or a cutter knife.

Therefore, the aperture-formed sleeve material of the present invention is handled and supplied in the planar state shown in FIG. Now, when constructing concrete walls and beams, in advance, the expandable tube material 3 is cut to a set length according to the thickness of the concrete wall or beam to be constructed, and the end plates 2,
20 are fixed at fixed positions on the inner surfaces of the temporary frames 5a and 5b, respectively. Next, after the temporary frames 5a and 5b are made to face each other, the deployable tube material 3 is inserted into the space between the reinforcing bars 6 and 6 while remaining in a plate shape, and positioned between the temporary frames 5a and 5b, and the edge thereof is inserted into the temporary frame. The sleeve material 1 for forming an opening is formed by bending into a cylindrical shape along the outer periphery of the end plates 2, 20 fixed to the ends, and adhering the adhesive tape 4 to the corresponding abutting sides. As a result, the opening forming sleeve material 1 is assembled into temporary frames 5a and 5 as shown in FIG.
Then, in this state, concrete is poured into the space between the temporary frames. At this time, the sleeve material 1 has sufficient strength due to the reinforcing ribs 31 on the inner surface, and is not deformed by the poured concrete.
It will be fixed by solidifying the concrete. When the concrete hardens and the temporary frames 5a and 5b are removed, the end plates 2 and 20 are fixed to the inner surface of the temporary frame, and are separated from the sleeve material for opening forming by cutting the continuous portion 21, leaving no surface on the concrete surface. , where the opening of the opening molding sleeve material 1 is located.

After that, the opening forming sleeve material 1 is cut along the cutting line 32.
By tearing along the sleeve, the sleeve material can be easily removed from the molded opening.

In the embodiment shown in FIG. 5, the end plate 2 is nailed to the inner surface of the temporary frame 5a as in the previous example, and the deployable tube member 3 is bent into a cylindrical shape along the outer periphery of the end plate 2, and both sides are exposed to impact. After matching,
A molded cylinder 1 similar to that described above is formed by pasting a long strip-shaped adhesive tape 4 to this abutting side. In this case, the amount of adhesive tape 4 used can be reduced compared to the above-mentioned example, and the adhesive tape 4 can also be used to connect the deployable tube member 3 and the end plate 2.

In addition, by providing the reinforcing ribs 31 of the expanding tube material 3 in an inclined manner with respect to the side sides, and by providing a plurality of cutting lines 32 along this inclination, the forming sleeve material can be removed after the concrete hardens. It can then be broken into a spiral and removed.

As described above, the present invention has end plates 2, 2 on the inner surface of the temporary frame.
0 is fixed, and the deployable cylinder material 3 is attached to the outer peripheral edge of these 2 and 20.
Since the sleeve material 1 for opening molding is constructed by aligning the sleeves 1 to form a cylindrical shape and pasting the adhesive tape 4, it is easy to attach the sleeve material 1 for opening molding at a fixed position to the inner space of the temporary frames 5a and 5b. It can be done. Moreover,
The present invention can be stocked, transported, and handled in a flat state, so it is not bulky and is easier to handle than conventional paper tubes. In addition, since the present invention uses waterproofed corrugated paper, etc., it is lightweight and has sufficient strength due to the reinforcing ribs 31. Furthermore, after opening molding, it can be easily torn and removed along the cutting line 32, etc. It has the effect of achieving the purpose of the invention.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the sleeve material for opening forming in concrete wall construction according to the present invention, Fig. 2 is a perspective view of the sleeve material configured in a cylindrical shape, Fig. 3 is a side view of the sleeve material installed between the mold plates, Figure 4 is Figure 3 A-A
A line sectional view, FIG. 5 is a plan view showing another embodiment, and FIG. 6 is an enlarged sectional view showing the reinforcing rib in an expanded state.
FIG. 7 is an enlarged sectional view showing the reinforcing rib in a bent state. DESCRIPTION OF SYMBOLS 1... Sleeve material for opening forming, 2, 20... End plate, 21... Continuous portion, 3... Expandable tube material, 31...
Rib, 32... Cutting line, 4... Tape, 5a, 5
b...Temporary frame.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Sleeve material for opening forming that is installed and fixed between temporary frames placed opposite each other according to the thickness of concrete walls such as partitions and beams, which is fixed to the inner surface of the temporary frame. an end plate having a rectangular shape with one side substantially equal to the circumferential length of the end plate, and an expandable cylinder member having a plurality of reinforcing ribs and cutting lines formed on the inner surface;
A sleeve material for forming an opening in concrete wall construction, consisting of an adhesive tape that is attached to the corresponding side when a cylindrical material is bent into a cylindrical shape along the outer periphery of an end plate. (2) The end plate has a thickness sufficient to allow the expandable tube material to be bent into a cylindrical shape along the outer periphery. Sleeve material. (3) The sleeve material for opening forming in concrete wall construction according to claim 1 of the utility model registration claim, wherein the end plate and the expandable tube material are waterproofed paper materials. (4) The sleeve material for opening forming in concrete wall construction according to claim 1 of the utility model registration claim, wherein the end plate and the expandable tube material are integrated or connected by a tape material.