JPH0413495Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a joint for corrugated pipes, particularly a joint for large-diameter corrugated pipes used for conveying water with relatively high water pressure, such as water supply pipes. be.

[Conventional technology]

Conventionally, this type of corrugated pipe fittings were
For example, as disclosed in Japanese Unexamined Patent Publication No. 132200/1983, a pair of joint bodies are provided with concave and convex portions corresponding to the spiral protrusions of the corrugated pipe to be connected, and a pair of joint bodies for screwing together are provided on the inner surface thereof. A circular tubular fitting with male and female threads was used.

[The problem that the idea aims to solve]

However, since the above-mentioned joint requires rotating the corrugated pipe when connecting, there is a problem that a great deal of labor is required and construction becomes complicated. This problem was particularly noticeable in large-diameter or long corrugated pipes.

In addition, since the fixing position of the corrugated pipe and the joint is not clear, if both the corrugated pipe and the joint are made of elastic synthetic resin or metal, the spiral protrusion of the joint will be pushed out and the end of the corrugated pipe will be The problem was that the joints were compressed, which caused a load on the joints, and the watertightness deteriorated over time.

[Means to solve the problem]

This device was devised to solve the above-mentioned problems of the conventional products, and has a thread on the inner circumferential surface of one end that is screwed into the thread of the corrugated pipe, and a thread on the inner peripheral surface of the other end that is attached to the thread of the corrugated pipe. A single left side joint is provided with a flange that abuts on the circumference and an O-ring is attached to the outer peripheral surface of the end, and one end has a connecting tube that tightly contacts the other end of the left side joint, and the other end has an inner periphery. A joint for corrugated pipes is used, which consists of a single right joint, which has a screw on the surface that is screwed into the thread of the corrugated pipe, and a stopper whose wall surface is bent so that the end of the corrugated pipe screwed on the middle part comes into contact with the stopper. This solved the problem.

The flange and the stopper in the present invention are for clarifying the setting position of the end of the corrugated pipe.

Further, the corrugated pipe and the joint alone are connected through the O-ring. As a joining means, in addition to a conventionally known O-ring made of rubber or the like having an elastic force for joining with said elastic force, a conventionally known O-ring made of a thermoplastic resin or the like can be used to connect the left joint alone. There is also a means for welding the right side joint alone.

〔Example〕

Hereinafter, one embodiment of this invention will be described in more detail based on the drawings. Fig. 1 is an exploded perspective view showing one embodiment of the corrugated pipe joint of this invention, and Fig. 2 shows the same in use. FIG. 3 is an explanatory view showing a manufacturing example of the corrugated pipe joint.

In the figure, reference numeral A denotes a single left joint, which has a screw 1 on the inner circumferential surface of one end that is screwed into the thread of the corrugated pipe a to be connected, and a screw 1 on the inner peripheral surface of the other end that is screwed into the thread of the corrugated pipe a to be connected. A contacting flange 2 is provided around the periphery, and two O-rings 3 are attached to the outer peripheral surface of the end portion at a predetermined interval. In the figure, symbol B
is a single right side joint, which has a connecting tube 4 at one end that fits into the other end of the left side joint unit A and comes into close contact with each other via the O ring 3, and a corrugated pipe a on the inner peripheral surface of the other end. It is formed to have a screw 5 that is screwed into the thread.

In addition, a tapered wall surface 6 that expands outward is formed at one end of the right side joint unit B to improve the fitability of the left side joint unit A, and a corrugated pipe a screwed to the middle part is formed. A stopper 7 formed by bending the wall surface is provided around the wall so that the end abuts against the stopper 7.

As shown in Fig. 3, the joint for corrugated pipes of this invention is made of polyvinyl chloride, etc., and molded into one piece by rotary molding or the like to form a left joint unit A and a right joint unit B, and then mold the left joint unit A and right joint unit B into one body. (dotted line)
By dividing at , one or two sets of individual joints can be molded at the same time.

Furthermore, when using the joint according to this embodiment, as shown in FIG. After screwing the screws 1 and 5 onto the threads until the flange 2 and stopper 7 come into contact with the end of the corrugated pipe a, and welding the end of the screw 1 to the thread of the corrugated pipe a that comes into contact, the right side The left joint unit A is fitted into the connecting tube 4 of the joint unit B to form an integral unit.

[Effect of idea]

Since the corrugated pipe joint of this invention has the above-mentioned configuration, it does not require the complicated work of rotating the corrugated pipe at the construction site unlike conventional products, and has the effect of significantly improving workability.

In addition, since the fixed position of the corrugated pipe and the joint is clearly defined by the stopper, there is no deformation of the spiral protrusion of the joint or the corrugated pipe, and there is little change in the joint part over time, which also improves watertightness. have an effect.

Furthermore, when the corrugated pipe and the single joint are fixed together by welding, there is an effect that watertightness is further improved.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing one embodiment of the corrugated pipe joint of this invention, Fig. 2 is a partially enlarged cross-sectional view showing the same in use, and Fig. 3 is an explanatory view showing an example of manufacturing the corrugated pipe joint. It is. A...Single left joint, B...Single right joint, 1
...Screw, 2...Flange, 3...O-ring, 4
...Connecting tube, 5...Screw, 7...Stopper.

Claims (1)

[Scope of utility model registration request] The inner peripheral surface of one end has a screw 1 that is screwed into the thread of the corrugated pipe a, and the inner edge of the other end has a flange 2 that abuts the end of the corrugated pipe a, and an O-ring on the outer peripheral surface of the end. 3, and a connecting cylinder 4 that is in close contact with the other end of the left joint unit A at one end, and a screw that is screwed into the thread of the corrugated pipe A on the inner peripheral surface of the other end. 5 and a right side joint unit B having a stopper 7 whose wall surface is bent so that the end of the corrugated pipe a screwed into the intermediate portion abuts.