JPH0659690U - Corrugated pipe connection structure - Google Patents

Abstract

(57) [Summary] [Purpose] Corrugated pipe connection that can be connected reliably without water leakage by simple work by cutting a corrugated pipe without a connection flange at the pipe end to the required length at the construction site. Provide structure. [Structure] Annular peaks 12 and 13 and annular troughs 32 and 3
A recess 51 in which the pipe ends of the corrugated pipes 2 and 3 having 3 alternately are arranged so as to abut, and at least one pipe end can be inserted
The annular elastic body 5 having the above is sandwiched between the tube ends, and the tube ends are fixed by the fixing tool 6 or the like in a state where the tube ends are close to each other. The annular elastic body 5 sandwiched between the pipe ends prevents water leakage.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connection structure for connecting a corrugated pipe made of synthetic resin used as a drain pipe, a water pipe, etc. so as not to leak water.

[0002]

[Prior art]

 Conventionally, many proposals have been made for a corrugated pipe connection structure, but it is surprisingly difficult to connect the corrugated pipes with a simple operation so as not to cause water leakage. For example, it is generally adopted that a flange is provided at a pipe end, and a packing is sandwiched between the flanges so that the flanges are bolted together for connection. Although such a connection structure is unlikely to cause water leakage and the connection work is relatively easy and has many excellent points, it has a major drawback.

[0003]

[Problems to be solved by the device]

 When using a standard length corrugated pipe, it is possible to connect it by providing flanges at both ends of the pipe, but when using the corrugated pipe after cutting it, there is no flange at the cut part. There was a problem that I could not connect because there was no. By the way, there are many means for continuously forming corrugated pipes, but it is difficult to make the flange part at the same time in the forming process of the corrugated pipe. There was an annoying problem that it had to be installed and made in a separate process.

The present invention has been made in view of the above problems, and provides a connection structure that does not require a facility for forming a flange portion and can be connected as it is by cutting a corrugated pipe into a length required at a construction site. The purpose is to do.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the connection structure of the present invention is arranged so that the pipe ends of a corrugated pipe having annular peaks and annular valleys intersect each other, and at least one pipe end can be inserted. An annular elastic body having a recess is sandwiched between the tube ends and fixed in a state where the tube ends are in close contact with each other.

[0006]

[Action]

 According to the configuration of the present invention, the pipe ends are arranged so as to abut each other, and the annular elastic body having the recess into which at least one pipe end can be inserted is sandwiched between the pipe ends. Is completely closed by the elastic body. Then, since the elastic body is fixed between the pipe ends while the pipe ends are brought close to each other while being sandwiched between the pipe ends, water in the pipe does not leak from the connecting portion of the pipe. Further, since the pipe end can be inserted into the recess of the elastic body, the position of the elastic body does not shift from the pipe end or is not dislocated, and the workability is excellent.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of a corrugated pipe connection structure of the present invention. In FIG. 1, reference numerals 2 and 3 are corrugated pipes having annular peaks 12 and 13 and annular valleys 32 and 33 alternately. The corrugated pipes 2 and 3 are usually made by continuous blow molding made of synthetic resin such as polyethylene or polyvinyl chloride. The pipe outer diameter is about 50 to 800 mm and the height from the valley to the ridge is 5 mm. ~ 100 mm. The inner sides of the pipes 2 and 3 may be corrugated, but when used as a drainage pipe or the like, a pipe having a smooth surface 22 with good water flow is preferably adopted. Such pipes 2 and 3 are arranged so that their ends abut each other, and the elastic body 5 is sandwiched between them.

FIG. 2 is a front view showing an embodiment of the elastic body 5 preferably used in the present invention, and FIG. 3 is a sectional view taken along the line AA of FIG. In FIG. 3, reference numeral 51 is a recess provided in the entire annular shape, 53 is an outer edge portion, and 52 is an inner edge portion. The recess is usually surrounded by the outer edge portion 53, the inner edge portion 52 and the inner wall portion 55, and the tube end is abutted on the inner wall portion 55.

FIG. 4 is a partially enlarged sectional view of the end portion of the pipe and the elastic body 5 arranged in a butted state. In FIG. 4, the tube end 26 is inserted into the recess of the elastic body 5. The height from the inner surface of the inner wall 22 of the tube 3 to the outer surface of the mountain portion 13 is preferably formed to be substantially the same as the distance between the inner edge portion 52 and the outer edge portion 53 of the recess 51. On the other hand, the pipe end 27 of the pipe is in contact with the outer wall 54 of the elastic body, and the width of the outer wall 54 in the diametrical direction is formed larger than the height from the inner surface of the inner wall 22 of the pipe to the outer surface of the mountain portion 12. Must have been done. Even if the inner edge portion 52 is extremely small or does not exist, it does not depart from the technical scope of the present invention. In that case, the recess means a portion surrounded by the outer edge portion 53 and the back wall portion 55. To do.

FIG. 5 is a partially enlarged sectional view showing a state where the tubes in FIG. 4 are brought close to each other. In FIG. 5, the ends of the respective pipes 2 and 3 exert a force for pushing the outer wall portion 54 and the back wall portion of the elastic body 5 from both sides via the elastic body 5 between them, and Close contact with the elastic body.

There are various means for bringing the tube ends into close proximity. For example, the fixing tool 6 shown in FIG. 6 is a material for covering the outer circumference of the pipe, and a ridge that can be fitted to the inner surface side of the half-divided cylindrical body so as to match the valley of the pipe when the pipe is in the proximity state 61 and 62 are provided, so that the upper half body 63 and the lower half body 64 can be clamped and fixed from the outer periphery of the half bodies 63 and 64 by the band 65 in a state where they overlap. Has become. The fixture 6 can be easily made by molding a metal such as aluminum or iron or a synthetic resin.

In addition, as a means for fixing the two pipes by bringing the pipe ends close to each other in a butted state, a metal wire is wound around the valleys near the respective pipe ends of the two pipes and wound around the valleys. It is also possible to tie several different wires to the metal wires and to bind the tied mutual wires close to each other. As described above, the means for fixing the pipe ends in the proximity state is not limited to the configuration of the present invention, as long as the pipes do not move or shift in the proximity state.

The material of the elastic body 5 used in the present invention is preferably a closed cell body having flexibility and made of rubber or synthetic resin. Especially, a material that expands by absorbing water maintains watertightness. Is more preferable.

Further, the shape of the elastic body 5 may be such that at least one surface of the annular elastic body is provided with a recess for wrapping the tube end, and in some cases, the outer edge portion and the inner edge portion are partially omitted. It may be what you are doing. It is desirable that the elastic body does not fall from the pipe end when the pipe end is inserted into the recess. In such a case, the other pipe end can be brought close to the recess of the elastic body while fitting the entire circumference of the pipe end, so that one person can connect the pipe. Needless to say, providing recesses at both ends of the annular elastic body in the axial direction does not depart from the technical idea of the present invention.

Since the elastic body of the present invention is used for the connection portion of a drainage pipe or the like, it is desirable to use not only water resistance and chemical resistance but also a large tear strength and good durability. Not good.

[0017]

[Effect of device]

 Since the corrugated pipe connection structure of the present invention fixes the annular elastic body having the recesses between the pipe ends with the pipe ends being close to each other, the work is easy. It has a remarkable effect of not leaking water. In particular, since at least one elastic body having a recess encloses one pipe end, the elastic body is prevented from being displaced from or separated from the pipe end, and has an excellent effect that reliable water tightness can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an essential part of a pipe connecting structure according to an embodiment of the present invention.

FIG. 2 is a front view showing an embodiment of an elastic body used in the present invention.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a cross-sectional view of essential parts when the pipes are brought into a butted state via the elastic bodies of FIGS. 2 and 3.

5 is a cross-sectional view of essential parts when the tube ends shown in FIG. 4 are brought into a close state.

FIG. 6 is a cross-sectional view of a fixture showing an example for bringing tube ends close to each other.

[Explanation of symbols]

 2,3 Corrugated tube 5 Elastic body 51 Recess 12,13 Mountain

Claims (1)

[Scope of utility model registration request] 1. A ring-shaped elastic body, which is disposed so that the tube ends of a corrugated tube having annular peaks and annular valleys alternately are abutted, and has a recess into which at least one tube end can be inserted. A corrugated pipe connection structure characterized in that it is sandwiched between and fixed in a state where the pipe ends are close to each other.