JPH07127773A - Fitting - Google Patents

Abstract

PURPOSE:To provide a fitting, by which leakage of water and slip-off of a pipe are hardly caused without damaging easiness of execution. CONSTITUTION:A fitting comprises a fitting main body 2, a seal member 5 formed by an elastic material, which is interposed between the insert port 3A of a connecting pipe 3 inserted in the acceptor port 4 of the main body 2 and the acceptor port 4, an elastic body 6 for pressing the seal member 5 in the tube axial direction, and a locking ring 7 for holding the elastic body 6 in the pressed state, wherein the locking ring 7 is removably locked on the acceptor port 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint for connecting pipes, for example, drain pipes in a liquid-tight manner.

[0002]

2. Description of the Related Art For example, in a drainage pipe installed in a building, pipes having a fixed length are connected via a pipe joint.
Conventionally, various types of pipe joints have been invented, but one that is illustrated in FIG. 5 is known as a pipe that is easy to pipe (see Japanese Patent Publication No. 1-269787). In this pipe joint 21, a cylindrical sealing member 24 having elasticity is inserted into the receiving portion 23 of the pipe joint main body 22, and then the insertion portion 25A of the connecting pipe 25 is inserted into the sealing member 24. ing. The seal member 24 is provided with an annular tongue piece 26 on the inner peripheral surface of the seal member main body 24A and an annular press contact piece 27 on the outer peripheral surface.

[0003]

According to the above pipe joint,
Although it has an advantage that it can be connected simply by inserting the insertion port of the connection pipe into the seal member and the construction is easy, the function as the seal material is mainly secured by the tongue piece 26, Considering the insertion of the connecting pipe, the wall thickness of the seal member main body 24A and the tongue piece 26 cannot be made too large, and when the pressure in the pipe becomes large, water leakage easily occurs, and in a remarkable case, the connecting pipe comes out of the pipe joint. In some cases.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a pipe joint which does not easily leak water or come out of a pipe without impairing the ease of implementation.

[0005]

In order to achieve the above object, the present invention takes the following technical means. That is, the first aspect of the present invention is to provide a pipe joint body (2), an insertion portion (3A) of a connecting pipe (3) to be inserted into a reception portion (4) of the main body (2), and the reception portion. A seal member (5) made of an elastic material fitted between (4), an elastic body (6) for pressing the seal member (5) in the tube axial direction, and the elastic body (6). The locking ring (7) is provided with a locking ring (7) for holding in a state.
Is detachably locked to the receiving portion (4).

A second aspect of the present invention is a pipe joint body (2).
And an elastic material fitted between the insertion opening (3A) of the connecting pipe (3) inserted into the receiving opening (4) of the main body (2) and the receiving opening (4). A seal member (5) and an engagement ring (7) for pressing the seal member (5) in the tube axial direction are provided, and the engagement ring (7) is detachably engaged with the receptacle (4). Has been done.

[0007]

According to the present invention, after the connecting pipe is mounted on the pipe joint main body through the seal member, the seal member can press the pipe axially through the elastic body or directly by the locking ring. Therefore, the connection pipe can be easily mounted, and the connection member can be firmly held in close contact with the seal member whose pressing force increases in the radial direction by pressing.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention, in which 1 is a pipe joint, and a seal member 5 fitted in a pipe joint body 2 and a receiving portion 4 for receiving an insertion portion 3A of a connecting pipe 3. And the seal member 5
It is composed of an elastic body 6 (coil spring) that presses in the axial direction of the pipe, and a detachable locking ring 7 that locks the seal member 5 to the receiving portion 4 via the elastic body 6.

The receiving portion 4 is formed by enlarging the inner peripheral surfaces of the upper and lower parts of the pipe joint body 2, and the outer end portion of the receiving portion 4 is fitted with a locking ring 7 on the inner peripheral surface thereof. An annular peripheral groove 8 for stopping is provided, and a ring fitting notch 9 is provided at a symmetrical position on the outer end wall 4B of the peripheral groove 8 on the tube end side, as shown in FIG. The seal member 5 has a substantially cylindrical seal member main body 5A made of an elastic material such as rubber, and an annular seal piece 5B having a diameter reduced inward sequentially on the inner peripheral surface of the insertion side end of the main body 5A. , An annular seal piece 5C projecting inwardly at the opposite end of the seal member body 5A (the end on the far side of the receiving portion 4), and the annular seal piece 5B is the outer peripheral surface of the insertion portion 3A. The inner end surface of the annular seal piece 5C comes into close contact with the inner end step surface 4A of the receiving portion 4.

The elastic body 6 is composed of a coil spring, and is fitted between the seal member 5 of the receiving portion 4 and the inner end surface of the locking ring 7 via ring-shaped sheets 10 and 11.
The elastic body 6 may be one in which a plurality of coil springs having a small diameter are fitted, and may be a material other than metal such as a disc spring, for example, an elastic material such as rubber. The seats 10 and 11 are made of metal, the inner seat 11 serves to reinforce the sealing member 5 and equalize the pressing force, and the outer seat 10 facilitates rotational mounting of the locking ring 7. Are doing However, these seats 10 and 11 may be attached if necessary and can be omitted. In addition,
The inner sheet 11 can be used as a reinforcing member for the seal member 5 by adhering it to the insertion-side end surface (end portion 4 opening-side end surface) of the seal member main body 5A, as shown by the two-dot chain line in FIG.

The locking ring 7 is made of metal and has an arcuate outer peripheral surface on the inner end side (the inner side of the receiving portion 4) and fits in the notch 9 of the pipe joint body 2 and also has a peripheral groove 8. Engaging flanges 12 that are slidable inside are provided so as to project at symmetrical positions, and the ring thickness is 4 C of the outer peripheral wall of the receiving end 4 and the connecting pipe insertion opening 3A.
The rotary tool insertion hole 13 is provided near the outer end and has a thickness such that the rotary tool insertion hole 13 is fitted between the two and has a thickness that allows the rotary tool to be rotated.

In the above embodiment, the seal member 5 is also fitted to the lower receiving portion 4 of the pipe joint body 2 as shown by the chain double-dashed line, and the locking ring 7 can be attached and detached via the elastic body 6. , So that the lower connecting pipe 3 and the upper connecting pipe 3 are connected to each other via the pipe joint 1. When the pipes are connected to each other according to the first embodiment, first, the seal member 5 is fitted in the receiving portion 4 of the pipe joint body 2, and then the inner sheet 11, the elastic body 6 and the outer sheet 10 are sequentially seated. After the fitting ring 7 is fitted on the outer end side of the member 5 and the locking ring 7 is fitted on the insertion port 3A of the connection pipe 3, the insertion port 3A is inserted from the outside of the seat 10 into the seal member 5 and the seal piece 5B. It is inserted while expanding outward in the radial direction, the end of the insertion port 3A is brought into contact with the seal piece 5C, and subsequently, the flange portion 12 of the locking ring 7 is fitted to the cutout portion 9 of the pipe joint body 2 and received. When the flange 12 comes into contact with the inner wall of the circumferential groove 8 by being pushed into the mouth 4 against the elastic force of the elastic body 6, the locking ring 7 is rotated by the turning tool.
Is rotated 90 degrees by utilizing the tool hole 13, and the flange portion 12 is engaged with the outer end side wall 4B of the circumferential groove 8,
The pipe connection work is completed.

According to the first embodiment, since the elastic body 6 presses the seal member 5 in the pipe axial direction, the seal member 5 forms the inner peripheral surface of the receiving portion 4 and the inner stepped surface 4A and the connecting pipe 3. Strongly adheres to the outer peripheral surface of the insertion portion 3A. Therefore, even if the pressure inside the pipe becomes greater than a predetermined value, the sealing function is enhanced, so that leakage can be prevented and the connecting pipe can be prevented from coming out.

When the pipe connection is released, the locking ring 7 is rotated 90 degrees and the flange 12 is aligned with the notch 9 so that the locking ring 7 is pushed out by the elastic force of the elastic body 6. At the same time, the pressing of the seal member 5 is released and the connecting pipe 3 can be easily pulled out. FIG. 4 shows an essential part of the second embodiment of the present invention. The difference from the first embodiment is that the elastic body 6 and the outer sheet 10 are eliminated and the length of the seal member 5 is increased to make the seal member 5 longer.
This is the point that the pressurizing margin S in the pipe axis direction is given to itself, so that the number of parts can be reduced and the workability can be improved compared to the first embodiment.

The pipe connecting work in the second embodiment is as follows.
The operation can be performed in substantially the same manner as in the first embodiment, and the same effect as that of the first embodiment can be expected. Therefore, the same parts as those in the first embodiment are designated by the same reference numerals as those in FIG. 1 and their detailed description is omitted. In addition, also in the second embodiment, the ring-shaped sheet 1
Although 1 can be omitted, the reinforcement of the sheet member 5 and the rotation of the locking ring 7 can be made smooth, and the sheet member 5 can be bonded.

The present invention is not limited to the above embodiment, and for example, the locking ring 7 may have a split structure which can be divided in the vertical direction. Also, pipe fitting 1
One end may be integrally connected to the connecting pipe (for example, by welding), and the design of the seal member, the locking ring, etc. can be changed appropriately.

[0017]

As described above, according to the present invention, after the connecting pipe is mounted on the pipe joint main body through the seal member, the seal member is provided with the elastic member or directly by the locking ring by the pipe shaft. Since the connecting pipe can be pressed in the direction, the connecting pipe can be easily mounted, and the connecting member can be firmly and closely held by the seal member whose pressing force in the radial direction is increased by the pressing. Even if the pressure in the pipe is increased and the pressure in the pipe becomes large, it is possible to prevent water leakage and the pipe from coming out.

[Brief description of drawings]

FIG. 1 is a central longitudinal sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a central longitudinal sectional view of a seal member.

FIG. 4 is a central longitudinal sectional view showing an essential part of a second embodiment of the present invention.

FIG. 5 is a central longitudinal sectional view showing a conventional example.

[Explanation of symbols]

 1 Pipe Joint 2 Pipe Joint Main Body 3 Connection Pipe 3A Insert Port 4 Receiving Port 5 Sealing Member 6 Elastic Body 7 Locking Ring

Claims (2)

[Claims] 1. A pipe joint main body (2) and an insertion port (3A) of a connecting pipe (3) inserted into a receiving port (4) of the main body (2).
A sealing member (5) made of an elastic material fitted between the sealing member and the receiving port (4), an elastic body (6) for pressing the sealing member (5) in the tube axial direction, and the elastic body. A pipe joint, comprising: a retaining ring (7) for holding (6) in a pressed state, the retaining ring (7) being detachably retained in the receptacle (4). 2. A pipe joint body (2) and an insertion portion (3A) of a connecting pipe (3) inserted into a receiving portion (4) of the body (2).
A seal member (5) made of an elastic material, which is fitted between the seal member and the receiving port (4); and a locking ring (7) for pressing the seal member (5) in the tube axial direction, A pipe joint, characterized in that a retaining ring (7) is detachably retained on the receptacle (4).