JPS626404B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a pipe end protection device that is used to facilitate the drawing out of the pipe end after removing the temporary frame when the pipe for installing electric wires is buried in the ceiling or wall surface in concrete construction, etc. It is related to the cover for.

Conventionally, when burying wiring piping in the ceiling or wall surface, etc., in order to facilitate the wiring from the pipe end after removing the temporary frame, or to facilitate the extension pipe connection to the pipe end, Methods used included drilling holes in the temporary frame and protruding the pipe ends outside the temporary frame before pouring concrete, and methods of locking the pipe ends in boxes fixed to the temporary frame and pouring concrete.

However, in the former case, there is a risk of concrete leaking if the hole diameter and pipe diameter do not perfectly match, and in the latter case, a box for piping is required, which increases the required cost. This was not desirable as it caused the number to increase.

Therefore, recently, a device called an end coupling shown in FIG. 1 has been commercially available and is commonly used.

That is, FIG. 1 shows a perspective view of an end coupling, which is used with a coupling coupling 2 inserted into a hollow main body 1 with an open bottom surface, and a leg for nailing is provided on the side of the main body 1. 3 is formed, and is used as shown in the construction cross-sectional view shown in Fig. 2.

First, the piping 5 is installed along the inner surface of the temporary frame 4,
After bending the pipe end to a predetermined angle and fixing it with the screw 6 of the coupling 2, the body 1 of the end coupling is fixed to the temporary frame 4 by nailing the leg 3, and then concrete 7 is poured. After the concrete 7 is fixed, the temporary frame 4 is removed, and then the main body 1 is removed, and one end of the coupling ring 2 opens as shown in Figure B, making it easy to run wiring or connect extension piping. be able to.

However, in such an end coupling, since the insertion angle of the coupling 2 with respect to the mounting surface to the temporary frame 4 is constant, unless the bending angle of the pipe 5 is completely matched with the insertion angle of the coupling 2, the main body 1 When fixing the main body 1 to the temporary frame 4, the coupling state between the main body 1 and the coupling ring 2 may become strained, and the coupling state 2 may come off from the main body 1, or the temporary frame 4 of the main body 1 may become loose.
The fixing situation is not as shown in FIG. 2A, and a gap is created between the lower surface of the main body 1 and the temporary frame 4, resulting in problems such as concrete flowing in.

The present invention has the purpose of fundamentally eliminating such drawbacks of the conventional art, and has the purpose of forming a tubular part at one end of a cylindrical body, and forming a tubular part on one side of the cylindrical body at a predetermined angle with respect to the extending direction of the tubular part. The present invention provides an extremely convenient tube end cover in which a planar opening is formed and a bellows portion is formed between the opening and the cylindrical body.

The details of the present invention will be explained below with reference to FIG. 3 and subsequent figures showing embodiments.

FIG. 3A shows a side view, and FIG. 3B shows a bottom view. The protruding tubular portion 12 is hollow, and one side surface, that is, the bottom surface of the cylindrical body 11 has a
A planar opening 13 is formed at a predetermined angle θ with respect to the extending direction of the tubular portion 12, and furthermore, the opening 13
A bellows portion 14 is formed between the cylindrical body 11 and the cylindrical body 11 .

Furthermore, protrusions 16 having nail holes 15 are provided on both sides of the opening 13 for convenient fixing to the temporary frame 4.
2a and a small diameter portion 12b, and is further provided with a groove portion 17, which allows for slight expansion according to the diameter of the pipe to be inserted.

The entire body is integrally molded using a hard elastic material such as resin, and the bellows portion 14 is designed to freely expand and contract.

Therefore, for small diameter piping, insert the small diameter part 12 directly into the small diameter part 12b, and for large diameter piping, cut out the small diameter part 12 and insert the pipe end directly into the large diameter part 12a, and as in FIG. 2A, open the pipe. After fixing the cylindrical body 11 to the temporary frame 4 with the part 13 on the temporary frame 4 side by nailing into the projection 16, concrete 7 is poured, and after the concrete 7 has solidified, the temporary frame 4 is removed. Opening 1
3 is completely exposed to the ceiling or wall surface, the internal tube end is also exposed, making it easy to draw in wiring or connect extension piping.

Even if the bending angle of the pipe end of the pipe 5 differs from the predetermined angle θ, it will be absorbed by the expansion and contraction of the bellows portion 14, and the opening 13 will be fixed in complete contact with the temporary frame 4. Therefore, there is absolutely no risk of the pipe end coming off or concrete flowing into the opening 13.

In addition, instead of molding the whole as a single piece, each part may be formed using metal or resin, etc., and these may be combined, or the opening 13 may be made into a membrane and then cut out later. In some cases, it may be covered with a removable lid.

As is clear from the above description, according to the present invention, due to the expansion and contraction action of the bellows part, even if the insertion angle of the tube end differs from the predetermined angle with the opening, the opening will come into complete contact with the temporary frame, and eventually Since this does not cause strain on the pipes, it is possible to facilitate the pipe bending work and the work to fix the temporary frame, etc., and a great effect can be obtained in terms of reducing the man-hours and costs required for the underground pipe work.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional end coupling, Fig. 2 is a sectional view of a construction situation using the one shown in Fig. 1, and Fig. 3 shows an embodiment of the present invention. 4 is a bottom view, and FIGS. 4A and 4B are cross-sectional views along X-X and Y-Y in FIG. 3A. DESCRIPTION OF SYMBOLS 11... Cylindrical body, 12... Tubular part, 13... Opening part, 14... Bellows part, θ... Predetermined angle.

Claims (1)

[Claims] 1. A tubular portion formed to protrude toward one end of the cylindrical body;
A planar opening formed on one side of the cylindrical body at a predetermined angle with respect to the extending direction of the tubular part, and a bellows portion formed between the opening and the cylindrical body. Features a tube end cover.