JPH0921166A - Removal preventive pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to prevent a joining area of a concrete pipe from being removed in a joint area of the concrete pipe even when the concrete pipe is forced to move by an earthquake or the like. SOLUTION: This invention relates to the structure of a pipe joint which joins two concrete pipes 1 and 2. A wide ring groove is bored in the outer peripheral surface of a spigot 3 of one concrete pipe 1. A rubber ring 6 is mounted on the inner peripheral surface of a socket 4 of the other concrete pipe 2. Then the rubber ring 6 is inserted into the ring groove 5, thereby assembling the joining areas.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for concrete pipes such as fume pipes, and more particularly to prevent the joints of concrete pipes from coming off when the concrete pipes buried in an earthquake or the like move due to vibration. It relates to a pipe joint to be obtained.

[0002]

2. Description of the Related Art As a conventional joint structure for concrete pipes of this type, for example, Japanese Utility Model Publication No. 59-18223,
The technique disclosed in Japanese Utility Model Publication No. 2-3029 is known.
In these conventional concrete pipe joint structures, a rubber ring for waterproofing is generally attached to the outer peripheral surface of the end of one concrete pipe, and a socket or collar is attached to the end of the other concrete pipe. At the time of joining, the socket or the collar is closely attached around the rubber ring of the concrete pipe.

[0003]

However, in the pipe joint having the above-mentioned conventional structure, it is possible to stop the water in the joint portion by the action of the rubber ring for waterproofing and the collar or the socket coated around the rubber ring. However, there is a problem that the end of the concrete pipe, which has been inserted until now, easily comes out of the collar or the socket when the pipe moves largely due to an earthquake or the like. Therefore, in order to combine and fix these again, there was a problem that the surrounding earth and sand had to be removed, each concrete pipe had to be arranged, and both ends should be connected to the previous state.

The pipe joint for preventing separation according to the present invention is a completely new technique developed in view of the above-mentioned conventional problems, and in particular, a wide ring groove is provided on the outer peripheral surface of a spigot of a concrete pipe, and By attaching a rubber ring to the socket of another concrete pipe coated around this spigot or the inner peripheral surface of the collar fitted to the concrete pipe, and inserting this rubber ring into the ring groove to combine , It provides a completely new pipe joint technology configured so that the joints of both pipes do not slip out even if they move due to an earthquake or the like.

[0005]

DISCLOSURE OF THE INVENTION The pipe joint for preventing separation according to the present invention is a technique in which the above-mentioned conventional problems have been fundamentally improved. The gist of the first invention is the concrete of a fume pipe or the like. In the pipe joint structure of the pipe, a wide ring groove is provided on the outer peripheral surface of the spigot of the concrete pipe, and the ring is formed on the inner peripheral surface of the socket of the concrete pipe or the collar fitted to the concrete pipe. It is a disconnection preventing pipe joint that is configured by providing a rubber ring that can be inserted into the groove.

The gist of the second invention of the disconnection preventing pipe joint according to the present invention is that the inner peripheral wall of the rubber ring is divided into a plurality of parts by ring-shaped cut grooves, and the divided inner peripheral wall tips are of the socket. The disconnection preventing pipe joint according to the first aspect of the present invention is characterized in that the pipe joint is formed so as to be inclined toward the rear side.

A third aspect of the pipe joint for preventing separation according to the present invention is that a plurality of rubber rings are provided on the inner peripheral surface of the socket of the concrete pipe or the collar fitted to the concrete pipe. First invention or second invention characterized by
It is a pipe joint for preventing separation according to the invention.

[0008]

According to the first aspect of the present invention, as described above, the ring groove is provided on the outer peripheral surface of the spigot of one concrete pipe, and the rubber is attached to the socket of the other concrete pipe or the collar fitted to the socket. Since the rubber ring was inserted into the ring groove when joining the concrete pipes with these rings, even if these concrete pipes move due to an earthquake, etc. The concrete pipes do not separate from each other.

In a second aspect of the present invention, the inner peripheral wall of the rubber ring locked to the standing inner wall surface of the ring groove is divided into a plurality of parts by a ring-shaped groove, and the divided inner peripheral wall tips are divided. Since the socket is slanted toward the back of the socket, even if the socket or spigot moves in the direction to come out, the slanted inner peripheral wall tip is securely locked to the standing inner wall surface of the ring groove, and it is possible to climb over it. Since it does not exist, the engagement can be made stronger.

According to the third aspect of the present invention, since a plurality of rubber rings are provided on the inner peripheral surface of the socket of the other concrete pipe or the collar fitted to this concrete pipe, these If one of the rubber rings is inserted into the ring groove of the other concrete pipe, and the other rubber ring is brought into contact with the outer peripheral surface of the spigot to join both concrete pipes, the water-stopping effect of the joint and dropout will occur. The preventive effect can be remarkably enhanced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, one embodiment of the pipe joint for separation prevention according to the present invention will be described in detail. FIG. 1 is a cross-sectional explanatory view showing an essential part of the joint of the first invention according to the present invention. Is the second
FIG. 3 is a sectional explanatory view showing an essential part of the pipe joint of the invention, and FIG. 3 is a sectional explanatory view showing an essential part of the pipe joint of the third invention.

Referring to FIG. 1, a pipe joint according to the first invention will be described. Reference numerals 1 and 2 are concrete pipes each made of a fume pipe, each of which has a spigot 3 formed at its tip and a rear end. A socket 4 into which the spigot 3 can be fitted is formed. On the outer peripheral surface of the spigot 3, a wide ring groove 5 having a depth of 5 mm and a width of 77 mm is formed. In addition, the inner peripheral surface of the socket 4 is 25 m
A rubber ring 6 having a width of m is projected.

Since the pipe joint according to the first aspect of the present invention has the above-mentioned structure, when connecting the concrete pipes 1 and 2, the spigot 3 of the concrete pipe 2 is inserted into the socket 4 of the concrete pipe 1 as shown in the figure. In addition, the rubber ring 6 protruding from the inner peripheral surface of the socket 4 is attached to the spigot 3
Both concrete pipes 1 and 2 can be joined by inserting them into the rear side of the ring groove 5 provided on the outer peripheral surface of the. At this time, the inner peripheral surface of the rubber ring 6 has the ring groove 5
It is closely attached to the bottom surface of the and is designed to stop water in this part.

As described above, the pipe joint according to the first aspect of the present invention has a structure in which the rubber ring 6 of the other side is inserted into the ring groove 5 of the other side. Even if the concrete pipes 1 and 2 move and external force such that the spigot 3 comes out of the socket 4 is applied,
Since the rubber ring 6 is brought into contact with and locked by the inner surface of the ring groove 5 on the tip side of the ring groove 5, the spigot 3 does not come out of the socket 4 and come off.

In particular, as shown in the figure, the inner peripheral wall of the rubber ring 6 is divided into three by two ring-shaped cut grooves 15, and the tip end of each divided inner peripheral wall is located at the inner side (inlet) of the socket 4. Since it is inclined to the opposite side), even if the joint moves in the direction of coming out due to an earthquake or the like, the tip of the inner peripheral wall is strongly abutted against the inner surface of the ring groove 5 which is standing up and does not get over it. Therefore, the engagement can be made stronger.

Referring to FIG. 2, the pipe joint of the second invention according to the present invention will be described as follows. That is, in the first invention, the socket 4 is formed on the concrete pipes 1 and 2, but in the case of the second invention, there is no socket 4 of this kind, and instead of the socket 4, the length of the shaft is provided at this portion. Is 175
The collar 7 of mm is attached and configured.

A rubber ring 8 having a width of 35 mm is attached to the inner peripheral surface of the front end portion of the collar 7 by bending the collar 7 into a predetermined shape. Moreover, a ring groove 9 having a depth of 5 mm and a width of 83 mm is bored on the outer peripheral surface of the spigot 3 of the concrete pipe 2. In addition, concrete pipe 1,
A cushion material 10 is interposed at the contact portion of 2.

Also in the case of the pipe joint of the second invention, the rubber ring 8 attached to the collar 7 is inserted into the ring groove 9 of the spigot 3, and the rubber ring 8 is brought into close contact with the bottom surface of the ring groove 9. Since it is assembled, even if the concrete pipes 1 and 2 move due to an earthquake or the like, the rubber ring 8 is locked to the standing surface inside the ring groove 9, so that the spigot 3 comes out of the collar 7 and comes off. Never.

Referring to FIG. 3, the pipe joint of the third invention of the present invention will be described as follows. That is, in the third invention, as in the second invention, the collar 11 is attached to the concrete pipe 1. The collar 11 has a large major axis length of 220 mm and has two rubber rings 12 and 13 attached to its inner peripheral surface.

One rubber ring 12 is attached to the inner peripheral surface of the collar 11 at the center thereof, and the inner diameter of the rubber ring 12 is formed to be substantially equal to the outer diameter of the spigot 3.
Therefore, when the concrete pipes 1 and 2 are joined, the rubber ring 12 is configured to be in close contact with the spigot 3.

The other rubber ring 13 is attached to the inner peripheral surface of the tip of the collar 11 and has a smaller inner diameter than the rubber ring 12. The rubber ring 13 is inserted into the ring groove 14 having a depth of 5 mm and a width of 81 mm provided on the outer peripheral surface of the spigot 3 when the concrete pipes 1 and 2 are joined, and the rubber ring 13 is provided on the bottom surface of the ring groove 14. The inner peripheral surfaces of are configured so as to be in close contact with each other.

In the case of the above-mentioned third invention, the spigot 3
The rubber ring 13 is inserted into the ring groove 14 of
Since the rubber ring 13 is in close contact with the bottom surface of the ring groove 14, it has the water blocking effect and the separating effect as in the first and second inventions. Further, in the case of the third invention, since the rubber ring 12 is in close contact with the outer peripheral surface of the spigot 3, the water stopping means can be doubled and the water stopping effect can be further enhanced.

[0023]

Since the separation preventing pipe joint according to the present invention has the structure and operation as described above, it has the following great effects.

(1) Since the rubber ring attached to the other concrete pipe is inserted into the ring groove provided in one concrete pipe, even if the pipe line moves due to an earthquake or the like, the rubber ring will not move into the ring groove. Since it is locked to the inner wall surface of the stand, the detachment of the joined concrete pipe can be completely prevented.
(2) Since the rubber ring is in close contact with the bottom surface of the ring groove,
It has a water blocking effect on the pipe joint. (3) When a plurality of rubber rings are used, the water blocking effect can be further enhanced. (4) When the inner peripheral wall of the rubber ring is divided and inclined in a certain direction, the engagement of the joint portion can be made stronger.

[Brief description of drawings]

FIG. 1 is an explanatory sectional view showing an essential part of a pipe joint according to a first aspect of the present invention.

FIG. 2 is a cross-sectional explanatory view showing a main part of the pipe joint of the second invention.

FIG. 3 is a cross-sectional explanatory view showing a main part of a pipe joint of the third invention.

[Explanation of symbols] 1,2 Concrete pipe 3 Spigot 4 Socket 5 Ring groove 6 Rubber ring 7 Color 8 Rubber ring 9 Ring groove 10 Cushion material 11 Color 12,13 Rubber ring 14 Ring groove 15 Cutting groove

Front page continuation (72) Inventor Hiroki Yamashita 1-22-2 Nishishinjuku, Shinjuku-ku, Tokyo Inside Haneda Hume Tube Co., Ltd. (72) Yuuji Minamibe 1-22 Nishishinjuku, Shinjuku-ku, Tokyo No. 2 inside Haneda Hume Tube Co., Ltd.

Claims (3)

[Claims] 1. A pipe joint structure for a concrete pipe such as a fume pipe, wherein a wide ring groove is provided on the outer peripheral surface of a spigot of the concrete pipe, and the socket of the concrete pipe or the fitting to the concrete pipe is performed. Pipe joint for preventing separation, which is formed by providing a rubber ring that can be inserted into the ring groove on the inner peripheral surface of the formed collar. 2. The inner peripheral wall of the rubber ring is divided into a plurality of parts by a ring-shaped groove, and the divided inner peripheral wall tips are formed to be inclined toward the inner side of the socket. The disconnection preventing pipe joint according to claim 1. 3. The detachment prevention device according to claim 1, wherein a plurality of rubber rings are provided on an inner peripheral surface of the socket of the concrete pipe or a collar fitted to the concrete pipe. Pipe fitting.