JPS6128556Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a fastening piece for inserting a nonflammable pipe into the outer peripheral surface of a synthetic resin pipe and fixing the synthetic resin pipe and the nonflammable pipe.

Multi-story buildings such as residential buildings, hotels, and general corporate buildings have water supply pipes, drainage pipes, ventilation pipes for exhaust pipes, and various distribution pipes that connect rooms on each floor, and synthetic resin has recently been used as the material for these pipes. Noncombustible pipes are used in which the outer circumferential surface of the pipe is coated with noncombustible pipes.

This non-combustible pipe requires, for example, a male part with a synthetic resin pipe protruding from both ends to be fitted into the other female part, so there are two manufacturing methods: one is to peel off the non-combustible pipe to the desired length, the other is a synthetic resin pipe. Although there is a method of separately molding a synthetic resin pipe and a noncombustible pipe, cutting them to a desired length, and inserting the noncombustible pipe into the synthetic resin pipe, the latter method is usually easier and therefore easier to adopt. If this insertion method is used, a gap will be created between the two pipes, and there will be less chance of damage to the non-flammable pipe due to stress caused by expansion of the synthetic resin pipe due to the difference in thermal expansion coefficient between the synthetic resin pipe and the non-flammable pipe during heating. Become. However, if the above-mentioned insertion method is used, the synthetic resin pipe and the noncombustible pipe are usually movable relative to each other in the axial direction. For this reason, for example, when performing piping work in the vertical direction or during transportation, the synthetic resin pipe may fall out, which is dangerous and may cause damage.

Due to such workability, it is necessary to integrate the synthetic resin pipe and the nonflammable pipe even temporarily while maintaining a gap.

The present invention was proposed based on the above request, and is a fastening piece that is inserted between a synthetic resin pipe and a non-combustible pipe to fix both pipes, and can be fixed elastically and removed. To provide a fastening piece convenient for piping work, which is simple and does not need to be removed, and has a structure that does not interfere with connection with a joint pipe or the like.

The present invention will be explained below with reference to the illustrated embodiments. In Figs. 1 and 2, 1 is a synthetic resin pipe made of, for example, hard vinyl chloride, and 2 is a synthetic resin pipe made of, for example, cement, calcined vermiculite, perlite, etc., in which inorganic fibers are added. A non-flammable pipe is kneaded with water, formed into a tubular shape, cured, dried, and hardened. Both pipes 1 and 2 are cut to an appropriate length.
A nonflammable pipe 3 is constructed by inserting a synthetic resin pipe 1 into a nonflammable pipe 2. The non-flammable pipe 3 has male parts 4 and 5 at both ends from which the ends of the synthetic resin pipe 1 protrude, and there is a narrow space between the outer circumferential surface of the synthetic resin pipe 1 and the inner circumferential surface of the non-flammable pipe 2. A gap 6 is formed. One or more fastening pieces 7 are inserted into this gap 6. This fastening piece 7 is formed from a metal plate material such as spring steel.
An L-shaped cross section consisting of a long insertion part 8 of a desired length to be inserted into the tube, and a short plate-shaped receiving part 9 which is bent at right angles from one end of the insertion part 8 and does not protrude outside the outer periphery of the noncombustible tube. It is in the form of Fastening piece 7 shown in Fig. 3
The insertion part 8 is flat plate-shaped, but the insertion part 8 of the fastening piece 7 shown in FIG. 4 is arc-shaped in the width direction so as not to damage the noncombustible pipe. Further, in the fastening piece 7 shown in FIG. 5, the insertion portion 8 is arc-shaped as in FIG.
There is a through hole 10 in. This facilitates the L-shaped bending. Furthermore, the fastening piece 7 shown in FIG. 6 has two narrow left and right small pieces 11, 1 in which the receiving part 9 is bent at a right angle only from the edge of the insertion part 8 for the same purpose.
1 is shown.

In any of the embodiments of the fastening piece 7, when the insertion part 8 is inserted from the open end of the gap 6 after the synthetic resin pipe 1 is inserted into the nonflammable pipe 2, the insertion part 8 Thus, the synthetic resin pipe 1 and the nonflammable pipe 2 are fixed. That is, for example, if the insertion part 8 is made into an arc shape, in addition to the above effect, the insertion part 8 is pressed and tension is applied within the gap 8, so that the synthetic resin pipe 1 and the nonflammable pipe 2 are elastically fixed. In particular, the fastening piece 7 is
As shown in the figure, inserting at three equal intervals will ensure more secure fixation. Incidentally, it goes without saying that even if the shape is not an arc shape, a flat shape as described above is useful for elastic fixation.

Since the receiving part 9 is received at the end of the noncombustible pipe 2, if it is not necessary during piping work, you may pull the receiving part 9 to remove the fastening piece 7, but since it is a thin piece, it is not necessary to remove it. When the male part and the female part are fitted together, it is possible to leave the connecting part sandwiched between both sides, which is convenient.

As described above, the present invention is convenient for fixing between synthetic resin pipes and non-combustible pipes, is also easy to remove, and can be used for piping work without removing them. The work becomes much easier and can be done quickly. Therefore, it is possible to put a nonflammable coated synthetic resin pipe into practical use.

[Brief explanation of the drawing]

The drawings show the case where the embodiment of the present invention is used; Fig. 1 is a partially sectional front view, Fig. 2 is a side view, and Figs. 3 to 6 each show examples of fastening pieces. FIG. 1...Synthetic resin pipe, 2...Nonflammable pipe, 6...〓
Between, 7...fixing piece, 8...insertion part, 9...receiving part.

Claims (1)

[Scope of utility model registration request] A fastening piece that is formed between two pipes when a synthetic resin pipe is inserted into a noncombustible pipe and is inserted between the two pipes to fix the two pipes, and has an arc-shaped cross section in the width direction and is long. A fastening piece for a synthetic resin pipe coated with a non-combustible material, characterized in that it is made of a thin metal piece consisting of an insertion part and a short receiving part perpendicular to the insertion part.