JPH09250667A - Removal preventive pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a removal preventive pipe joint suitable for a resin pipe such as an FRPM pipe. SOLUTION: In this pipe joint in which the spigot 17 of the other side pipe 16 is inserted to the inner side of the faucet 12 of one side pipe 11, which are jointed each other, and a seal member 15 is to be contracted between the faucet and the spigot, the seal member 15 is fixed to either one side of the faucet 12 and the spigot 17, and a removal preventive member 21 which can prevent the removal between the faucet and the spigot by engaging with the seal member 15, is installed to either one side of the faucet 12 and the spigot 17, in the condition inserting the spigot 17 to the faucet 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separation prevention pipe joint particularly applied to a resin pipe.

[0002]

2. Description of the Related Art Pipe fittings for resin pipes such as FRPM pipes generally have a receiving structure as shown in FIG. That is, in FIG. 5, one of the pipes 1 joined to each other
The receiving end 2 is formed at the end of the
An insertion port 4 to be inserted inside the receiving port 2 is formed. An annular rubber seal material 5 is arranged between the inner peripheral surface of the receiving opening 2 and the outer peripheral surface of the insertion opening 4.
The required sealing function is achieved by being compressed between the receiving and inserting openings. The sealing material 5 is configured to be adhered to either the inner peripheral surface of the receiving opening 2 or the outer peripheral surface of the insertion opening 4. In the example of FIG. Has been done.

Such a pipe joint of a resin pipe such as a FRPM pipe is characterized by being excellent in expansion and contraction and flexibility, and has an advantage that it is easy to follow the ground movement during an earthquake.

[0004]

However, due to the structure, there is no function to prevent the joints from coming out from each other and the joints are not detached when a large fluctuation occurs locally. It has a problem that it may occur.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above problems and obtain a separation prevention pipe joint suitable for a resin pipe such as a FRPM pipe.

[0006]

In order to achieve this object, the present invention is to insert the insertion port of the other pipe into the inside of the reception port of one of the pipes to be joined to each other and seal between the reception port insertion ports. In a pipe joint adapted to compress a material, the sealing material is fixed to any one of the receiving opening and the insertion opening, and the receiving opening and the insertion opening are inserted in the receiving opening. On the other hand, a detachment prevention member capable of preventing detachment between the receptacle insertion ports by engaging with the sealing material is attached.

With such a structure, when a withdrawal force acts between the receiving opening and the receiving opening, the separation preventing member engages with the sealing material to prevent the separation of the both. Since the detachment prevention member is attached with the insertion opening inserted in the receiving opening, in other words, it is attached after the insertion opening is inserted into the receiving opening, so that the insertion opening is inserted into the receiving opening. The work is the same as in the case of the conventional pipe joint that does not have a separation prevention function, and therefore even if the separation prevention member is provided, there is no problem in the insertion work of the insertion opening.

[0008]

1 and 2 show a first embodiment according to the present invention. Here, 11 is one of the pipes joined to each other, and a receiving port 12 is formed at the tip thereof. That is, the pipe 11 has a pipe main body 13 having a uniform diameter, and a receiving member 14 is fitted on the outer periphery of one end of the pipe main body 13 and is integrated by adhesion or the like to form the receiving port. 12 are formed. An annular rubber sealing material 15 is fixed to the inner periphery of the opening end of the receiving port 12 by means such as adhesion.

Reference numeral 16 denotes the other tube joined to the tube 11, and at the tip thereof, an insertion opening 17 is formed by utilizing the other end of the tube body 13. A taper surface 18 is formed on the outer periphery of the tip of the insertion slot 17.
Are formed.

When the pipes 11 and 16 are joined together, the insertion port 17 is inserted into the receiving port 12 to which the sealing material 15 is fixed on the inner periphery as described above. Then, the tapered surface 18 of the insertion port 17 acts to spread the sealing material 15, so that the insertion port 17 enters the inner peripheral side of the sealing material 15, and thereby the space between the receiving port 12 and the insertion port 17 is increased. At this point, the sealing material 15 is compressed and the required sealing function is achieved.

In this way, the tip of the insertion opening 17 is sealed with the sealing material 15.
After passing through the inner circumference, the separation preventing member 21 is attached to the tip of the insertion port 17 from the inner surface of the pipe. That is, the detachment prevention member 21 is formed in an L-shaped cross section, and is disposed along the pipe inner peripheral portion 22 arranged along the inner periphery of the distal end portion of the insertion opening 17 and the end surface of the insertion opening 17. The pipe end surface portion 23 is integrally formed with the pipe end surface portion 23, and is provided so as to correspond to a certain range in the circumferential direction at the tip end portion of the insertion port 17. A plurality of separation prevention members 21 are provided along the circumferential direction at the tip of the insertion opening 17.

The detachment prevention member 21 is fixed to the tip of the insertion opening 17 by a plurality of bolts 24 in the circumferential direction passing through the inner peripheral portion 22 of the pipe. When fixed in this way, the tube end surface portion 23 contacts the tip end surface of the insertion opening 17, and the outer peripheral side thereof projects radially outward from the outer peripheral surface of the insertion opening 17 inside the receiving opening 12.

Therefore, when the withdrawal force acts between the receiving and inserting openings, the tube end surface portion 23 of the detachment prevention member 21 engages with the seal material 15, thereby preventing the detachment.

Since the detachment prevention member 21 is attached to the insertion opening 17 after the insertion opening 17 is inserted into the reception opening 12,
The insertion work of the insertion opening 17 into the inside 12 is no different from the case of the conventional pipe joint which does not have the separation preventing function. Therefore, even if the separation preventing member 21 is provided, the insertion workability of the insertion opening 17 is not affected at all, and the work can be performed without causing more difficulty than the conventional one. By loosening the bolt 24, the separation prevention member 21 can be removed to cancel the separation prevention function. In addition, the joint can be easily disassembled in the case of laying a pipeline or the like.

The rear end surface 19 of the receiving port 12 is provided at a position spaced from the sealing material 15 by a certain distance, and thereby the joint portion is provided with an expanding / contracting function. Also the sealing material 15
Has a constant thickness, thereby imparting flexibility to the joint portion. These points are the same as the conventional ones.

FIGS. 3 and 4 show a second embodiment of the present invention.
An embodiment will be described. Here, the sealing material 15 is fixed to the outer periphery of the insertion opening 17, and correspondingly, a tapered surface 25 for guiding the sealing material 15 is formed on the inner periphery of the opening end of the receiving opening 12.

Further, here, the detachment prevention member 21 is attached to the outer periphery of the opening end of the receiving port 12 by a bolt 24 through the outer peripheral portion 26 of the pipe, and the end face portion of the pipe contacting the end face of the receiving port 12 is attached. The inner peripheral side of 23 projects inward in the radial direction from the inner peripheral surface of the receiving port 12 so that it can be engaged with the sealing material 15 as well. Therefore, also in this case, a similar separation prevention function can be obtained.

3 and 4, the joint 12 is provided with an expansion / contraction function by forming the inner periphery of the receiving port 12 longer than the sealing material 15 in the axial direction. . It also has flexibility.

[0019]

As described above, according to the present invention, the insertion port of the other pipe is inserted into the receiving port of the one pipe to be joined to each other, and the sealing material is compressed between the receiving port insertion ports. In the pipe joint according to the above, the sealing material is fixed to one of the receiving opening and the insertion opening, and the sealing material is attached to the other of the receiving opening and the insertion opening in a state where the insertion opening is inserted into the receiving opening. Since a detachment prevention member that can prevent the detachment between the receiving and inserting ports by engaging with the material is attached, when the withdrawal force acts between the receiving and inserting ports, the detachment preventing member engages with the sealing material. It is possible to prevent the two from coming off. Also, since the detachment prevention member is attached after the insertion port is inserted inside the receiving port, the insertion work of the insertion port into the receiving port is no different from the case of the conventional pipe joint that does not have the removal preventing function. ,
Therefore, it is possible to work without difficulty than the conventional one.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a first embodiment of a separation prevention pipe joint of the present invention.

FIG. 2 is an end view of the portion shown in FIG.

FIG. 3 is a cross-sectional view of a second embodiment of the separation prevention pipe joint of the present invention.

FIG. 4 is an end view of the portion shown in FIG.

FIG. 5 is a cross-sectional view of a conventional resin pipe joint.

[Explanation of symbols]

 11 Pipe 12 Receptacle 15 Sealing material 16 Pipe 17 Insert 21 Disengagement prevention member

Claims (1)

[Claims] 1. A pipe joint, wherein an insertion port of the other pipe is inserted into a receiving port of one pipe to be joined to each other, and the sealing material is compressed between the receiving port insertion ports. Is fixed to one of the receiving port and the insertion port, and the receiving port is inserted into the other of the receiving port and the insertion port in the state where the insertion port is inserted into the receiving port by engaging the sealing material. A separation prevention pipe joint, characterized in that a separation prevention member capable of preventing separation between the openings is attached.