JP2011106625A - Pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint that can suppress enlargement and damage to a pipe while preventing the pipe from slipping off due to the erroneous operation of a release ring. <P>SOLUTION: The pipe joint 10 includes a cap 18 inserted on the outside of an intermediate part 14 of a joint body 16, and a lock ring 30 arranged at a position to face an insertion hole 20 for inserting the pipe 40. The inside of the cap 18 is provided with the release ring 22 releasing the bite of a claw part 36 of the lock ring 30 into the pipe 40 when pushed into inside the insertion hole 20, on the inlet 20A side from the lock ring 30. The cap 18 is provided with a through-hole 19 for inserting a shaft part 26A of a pin 26, and the release ring 22 is provided with a hole part 23 communicating with the through-hole 19. The shaft part 26A of the pin 26 is inserted into the through-hole 19 and the hole part 23. The release ring 22 does not move to the inner side of the insertion hole 20 to prevent the pipe 40 from slipping off due to the erroneous operation of the release ring 22. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a pipe joint capable of coupling and detaching a pipe body.

  2. Description of the Related Art Conventionally, a pipe joint that connects a pipe to an insertion hole of a joint body by a one-touch operation and can pull out (remove) the pipe from the insertion hole is generally used.

  For example, Patent Literature 1 below discloses a pipe joint including a lock ring inside an insertion hole and a release ring on the inlet side of the insertion hole with respect to the lock ring. In this pipe joint, the claw on the inner peripheral side of the lock ring bites into the outer peripheral surface of the pipe, thereby preventing the pipe from coming off from the insertion hole. Further, when extracting the pipe from the insertion hole, the claw of the lock ring is removed from the pipe by the tip of the release ring by pushing the release ring into the back side of the insertion hole, and the pipe can be extracted from the insertion hole.

  Further, in Patent Document 2 below, a space formed between a flange provided on a protruding portion of the release ring and the joint body is arranged so that the release ring projects outward from the pipe connection port of the joint body. In addition, a pipe joint loaded with a substantially C-shaped end ring that prevents the release ring from being pushed into the back side of the pipe connection port is disclosed. In this pipe joint, the end ring is removed from between the flange and the joint body, and the release ring is pushed into the back of the pipe connection port, so that the chuck claw is peeled off from the pipe and the pipe is pulled out from the pipe connection port. be able to.

JP 2006-316877 A JP 2007-120671 A

  However, in Patent Document 1, when the release ring is accidentally pushed, there is a possibility that the claw of the lock ring comes off from the pipe due to a malfunction of the release ring, and the pipe comes out of the insertion hole.

  Further, in the pipe joint described in Patent Document 2, it is possible to suppress malfunction of the release ring by loading the end ring in the space between the flange of the release ring and the joint body. Since the flange is exposed outward from the joint body, the joint becomes large. Moreover, when a pipe | tube is bent, a member may bend or a pipe | tube may be damaged.

  The present invention has been made in view of the above-described problems, and provides a pipe joint that can prevent a tubular body from coming off due to a malfunction of a release ring and can suppress an increase in size, damage to a pipe, and the like. With the goal.

  In order to achieve the above object, a pipe joint according to the invention of claim 1 is held by a joint body in which an insertion hole into which a pipe body is inserted is formed, and the joint body or a cap externally inserted in the joint body. And a ring portion that extends obliquely toward the insertion direction of the tube body that is inserted into the insertion hole on the inner peripheral side of the ring portion, and that bites into the outer peripheral surface of the tube body to extract the tube body A lock ring provided with a plurality of claw portions, and held on the inlet side of the insertion hole rather than the lock ring inside the joint body or the cap, and the claw portion and the outer peripheral surface of the tube body A release ring that enters between the pipe body and releases the bite of the claw into the pipe body, a through hole formed in a radial direction in the joint body or the cap, and a release ring that is inserted into the through hole. The release ring A male member to prevent be pushed in a direction to release the biting into the pipe body tight portion, and has a.

  According to the present invention, the ring portion of the lock ring is held by the joint body or the cap extrapolated to the joint body. The lock ring has a plurality of claws extending obliquely in the insertion direction of the tube on the inner peripheral side of the ring portion. When the tube is inserted into the insertion hole of the joint body, due to the action of internal pressure, etc. The plurality of claw portions of the lock ring bite into the outer peripheral surface of the tube body, and the tube body is prevented from coming off from the insertion hole. A through-hole is formed in the joint body or cap in the radial direction, and the release ring is released from biting into the tube body when the insertion member is inserted into the through-hole and comes into contact with the release ring. It is prevented from being pushed into.

  Also, when pulling out (removing) the tube body from the insertion hole of the joint body, it is possible to push the release ring in the direction to release the nail from biting into the tube body by removing the insertion member from the through hole. It becomes. By pushing in the release ring, the release ring enters between the claw portion of the lock ring and the outer peripheral surface of the tube body, and the biting of the claw portion into the tube body is released, and the tube body can be pulled out from the insertion hole. As a result, the release ring is prevented from being accidentally pushed, and the tubular body is prevented from being pulled out due to a malfunction of the release ring. Further, it is not necessary to provide a flange on the release ring and expose it from the joint main body (or cap) to the outside as in the prior art, and it is possible to prevent the enlargement and the pipe from being damaged.

  The invention according to claim 2 is the invention according to claim 1, wherein a hole is provided in the release ring, and the insertion member penetrates the through hole and is inserted into the hole. It contacts the release ring.

  According to the present invention, the hole is provided in the release ring, and the insertion member comes into contact with the release ring when the insertion member passes through the through hole and is inserted into the hole. Accordingly, the release ring does not move in the axial direction unless the insertion member is removed, and the release ring is prevented from being pushed in the direction of releasing the claw portion from biting into the tube body. For this reason, the tube is prevented from coming off due to the malfunction of the release ring.

  The invention according to claim 3 is the invention according to claim 2, wherein the insertion member is screwed to at least the through hole.

  According to the present invention, the insertion member is screwed to at least the through hole, and the insertion member is firmly fixed to the joint body or the cap. For this reason, it is prevented that an insertion member removes carelessly.

  In the pipe joint according to the present invention, it is possible to prevent the tubular body from coming off due to a malfunction of the release ring, and to suppress an increase in size and damage to the pipe.

It is a pipe joint which concerns on 1st Embodiment of this invention, Comprising: It is a half-cut sectional view which shows the state which isolate | separated the pipe body. It is a half-cut sectional view which shows the state which inserted the pipe body to the pipe joint shown in FIG. It is a half-cut sectional view which shows the state which couple | bonded the pipe body with the pipe joint shown in FIG. It is a top view which shows the lock ring used for the pipe joint shown in FIG. It is sectional drawing which shows the state which the nail | claw part of the lock ring digged into the pipe body. FIG. 2 is a half cut sectional view showing a process of pulling out a pipe body from the pipe joint shown in FIG. 1. It is a pipe joint which concerns on 2nd Embodiment of this invention, Comprising: It is a half-cut sectional view which shows the state which couple | bonded the pipe body to the pipe joint. It is a pipe joint which concerns on 3rd Embodiment of this invention, Comprising: It is a half-cut sectional view which shows the state which couple | bonded the pipe body with the pipe joint. It is a pipe joint which concerns on 4th Embodiment of this invention, Comprising: It is a half-cut sectional view which shows the state which couple | bonded the pipe body with the pipe joint.

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

  FIG. 1 shows a state where the pipe joint and the pipe body according to the first embodiment of the present invention are separated. 2 shows a state in which the pipe body is inserted halfway into the pipe joint shown in FIG. 1, and FIG. 3 shows a state in which the pipe body is coupled to the pipe joint shown in FIG. Yes.

  As shown in these drawings, in the pipe joint 10, a joint main body 16 is constituted by a tubular main body portion 12 and a tubular intermediate portion 14 extrapolated to the main body portion 12. Furthermore, the pipe joint 10 includes a tubular cap 18 that is extrapolated to the intermediate portion 14, and is formed between the cylindrical portion 12 </ b> A formed on one end side of the main body portion 12, the intermediate portion 14, and the cap 18. An insertion hole 20 into which the tube body 40 is inserted is formed.

  A lock ring 30 for holding the tube body 40 in the insertion hole 20 is disposed inside the cap 18. The lock ring 30 has a substantially V-shaped cross section, and is disposed so that the substantially V-shaped opening 30 </ b> A is directed to the inner side of the joint body 16. Here, the back side of the joint body 16 means the insertion direction of the tube body 40 into the insertion hole 20, that is, the side opposite to the inlet 20 </ b> A of the insertion hole 20. The opening 30A of the lock ring 30 is disposed so as to face the ship-shaped tip 14A of the intermediate portion 14, and a part of the opening 30A is in contact with the tip 14A.

  Further, a tapered surface 18 </ b> A with which the substantially V-shaped outer surface of the lock ring 30 can abut is formed on the inner wall of the cap 18. The tapered surface 18A is formed to have a smaller diameter toward the inlet 20A side of the insertion hole 20.

  A release ring 22 that is movable along the axial direction of the cap 18 is inserted inside the cap 18 closer to the inlet 20 </ b> A of the insertion hole 20 than the lock ring 30. The release ring 22 has a substantially cylindrical shape, and the inner wall forms a part of the insertion hole 20. A protrusion 22A is formed on the outer periphery of the release ring 22 in the circumferential direction, and the protrusion 22A comes into contact with a small diameter portion 18B formed on the inner periphery of the cap 18 to prevent the cap 18 from coming off. ing. The tip 22 </ b> B of the protrusion 22 </ b> A has a tapered shape and is disposed along the radially outer peripheral surface of the lock ring 30. Further, the end portion of the release ring 22 on the inlet 20 </ b> A side of the insertion hole 20 is not exposed outward from the end surface of the cap 18. For this reason, when pushing the release ring 22 into the back side of the insertion hole 20, a dedicated jig (not shown) is brought into contact with the end of the insertion hole 20 of the release ring 22 on the inlet 20 </ b> A side so that the release ring 22 is moved. Will be pushed in.

  A through hole 19 into which a pin 26 as an insertion member is inserted is formed in the cap 18 along the radial direction. The pin 26 includes a cylindrical shaft portion 26A and an annular knob portion 26B formed at one end portion of the shaft portion 26A (the end portion on the opposite side to the insertion direction into the through hole 19). The through hole 19 is a circular hole having substantially the same diameter along the radial direction, and the inner diameter of the pin 26 is substantially the same as the outer diameter of the pin 26 or the pin 26 so that the pin 26 is difficult to be removed when the shaft portion 26A of the pin 26 is inserted. The inner diameter is slightly larger than the outer diameter of 26. The shaft portion 26A may be a prism, and the knob portion 26B may be a flange portion having a larger diameter than the shaft portion 26A.

  In the release ring 22, a hole portion 23 into which the shaft portion 26 </ b> A of the pin 26 penetrating the through hole 19 is inserted is formed along the radial direction. The hole 23 of the release ring 22 communicates with the through hole 19 in the radial direction at a position where the protrusion 22A contacts the small diameter portion 18B of the cap 18 (a position where the release ring 22 is not pushed into the back side of the insertion hole 20). ing. The hole 23 is a circular hole having substantially the same diameter along the radial direction, and the inner diameter of the pin 26 is substantially the same as the outer diameter of the pin 26 or the pin 26 so that the pin 26 is difficult to be removed when the shaft portion 26A of the pin 26 is inserted. The inner diameter is slightly larger than the outer diameter of 26. When the shaft portion 26A is a prism, the through hole 19 may be rectangular. The hole 23 penetrates in the radial direction of the release ring 22, but it does not necessarily have to penetrate, and may be provided only on the outer peripheral side of the release ring 22. The hole 23 may be a long hole in the circumferential direction so that the through-hole 19 of the cap 18 communicates with the hole 23 of the release ring 22 even if the release ring 22 is slightly rotated in the circumferential direction. Moreover, you may provide the convex part and recessed part which mutually fit in the contact surface with the release ring 22 of the cap 18 so that the release ring 22 may not rotate relatively with respect to the cap 18 in the circumferential direction.

  The shaft portion 26A of the pin 26 that has passed through the through hole 19 of the cap 18 is inserted into the hole portion 23 of the release ring 22 so that the release ring 22 does not move in the axial direction (the release ring 22 is located on the back side of the insertion hole 20). Not to be pushed in). The pin 26 can be removed from the through hole 19 and the hole 23 by gripping the knob 26B and pulling it out with a strong force radially outward of the cap 18. With the pin 26 removed from the through hole 19 and the hole 23, the release ring 22 can be pushed into the back side of the insertion hole 20. As shown in FIG. 5, by pushing the release ring 22 into the back side of the insertion hole 20, the distal end portion 22 </ b> B of the release ring 22 enters between the claw portion 36 of the lock ring 30 and the outer peripheral surface of the tube body 40. (See FIG. 4B), the claw portion 36 can be removed from the outer peripheral surface of the tubular body 40. When the nail | claw part 36 remove | deviates from the outer peripheral surface of the tubular body 40, the tubular body 40 can be extracted from the insertion hole 20 (it is made to detach | leave).

  As shown in FIGS. 1 to 3, the main body portion 12 includes a cylindrical portion 12 </ b> A whose outer diameter decreases toward the inlet 20 </ b> A side of the insertion hole 20, and the outer peripheral surface of the cylindrical portion 12 </ b> A is intermediate. It faces the inner wall of the portion 14 and the inner wall of the cap 18. A space where the outer peripheral surface of the cylindrical portion 12A faces the inner wall of the intermediate portion 14 and the inner wall of the cap 18 serves as an insertion hole 20 into which the tubular body 40 is inserted. Further, two circumferential grooves 12B are formed on the outer peripheral surface of the cylindrical portion 12A at positions facing the inner wall of the cap 18, and rubber rings 24 are fitted into these circumferential grooves 12B, respectively.

  In addition, a wall surface 13 having an outer diameter larger than that of the cylindrical portion 12A is formed at the innermost portion of the insertion hole 20 on the back side of the circumferential groove 12B of the main body portion 12. It is a stopper. In addition, a female screw 12 </ b> C to which another pipe is connected is formed on the opposite side of the main body 12 from the insertion hole 20.

  In this pipe joint 10, the main body portion 12 can be made of bronze, the intermediate portion 14, the cap 18 and the release ring 22 can be made of resin, and the lock ring 30 can be made of metal (for example, stainless steel). Each member of the pipe joint 10 is not limited to these materials, and other materials may be used. The tube body 40 is made of resin (for example, polybutene). The tube body 40 is not limited to resin, but may be made of rubber, metal (a metal material into which the claw portion 36 of the lock ring 30 can bite), or other materials.

  4A and 4B, the lock ring 30 includes a ring portion 31 formed by bending an annular plate material into a substantially V shape. The ring portion 31 includes a cutout portion 32 in which the ring portion 31 is cut out in the radial direction from the inner peripheral side at predetermined intervals in the circumferential direction, and the ring portion 31 is cut out in the radial direction from the outer peripheral side at a position different from the cutout portion 32 Notch portions 34 are provided (eight in each embodiment in this embodiment). The lock ring 30 has a substantially V-shaped cross section in which a portion where the notch 32 and the notch 34 are not formed is cut along the axial direction. Between the notches 32 on the inner peripheral side of the ring portion 31, a plurality of claw portions 36 extending obliquely toward the inner peripheral side toward the inner side of the pipe joint 10 are provided. The claw portion 36 is bent to the inner peripheral side so that the tip side expands the opening 30A, and the tip of the claw portion 36 is formed in a pointed shape.

  The lock ring 30 expands concentrically with the insertion of the tube body 40 into the insertion hole 20. That is, the lock ring 30 has a substantially V-shaped cross section, and has a total of 16 notches 32 and 34 on the inner peripheral side and the outer peripheral side of the ring portion 31, so that it has moderate elasticity. ing.

  Next, the operation of the pipe joint 10 will be described.

  When the pipe body 40 is inserted into the insertion hole 20 of the pipe joint 10, the tip of the pipe body 40 expands the diameter of the lock ring 30 as shown in FIG. 2. The tubular body 40 is inserted into the insertion hole 20 while the outer peripheral surface of the tubular body 40 is in sliding contact with the claw portion 36 of the lock ring 30, and the inner peripheral surface of the tubular body 40 is connected to the two rings 24, 24. Contact. When the tubular body 40 is further inserted, the distal end of the tubular body 40 reaches the wall surface 13 of the main body 12.

  When the internal pressure is applied to the tube body 40, the tube body 40 and the lock ring 30 are slightly moved in the direction in which the tube body 40 and the lock ring 30 are removed from the joint body 16 as shown in FIG. The outer peripheral side of the ring portion 31 of the lock ring 30 contacts the tapered surface 18 </ b> A of the cap 18. As a result, the plurality of claw portions 36 of the lock ring 30 bite into the outer peripheral side of the tube body 40. At this time, since the plurality of claw portions 36 of the lock ring 30 are inclined toward the back side of the joint body 16, the claw portions 36 are easy to bite into the tube body 40, and the claw portions 36 are opposite to the direction in which the tube body 40 is pulled out. The tube 40 is difficult to come off. Thereby, it is possible to prevent or suppress the tube body 40 from being pulled out (detached) from the insertion hole 20.

  Further, since the shaft portion 26A of the pin 26 is inserted into the through hole 19 of the cap 18 and the shaft portion 26A of the pin 26 passing through the through hole 19 is inserted into the hole portion 23 of the release ring 22, the release ring 22 is Does not move in the axial direction. For this reason, the release ring 22 is not accidentally pushed into the back side of the insertion hole 20, and the claw portion 36 of the lock ring 30 can be prevented from coming off from the outer peripheral surface of the tubular body 40. As a result, the tube body 40 can be prevented from coming out of the insertion hole 20 due to a malfunction of the release ring 22.

  On the other hand, when the tube body 40 is pulled out (detached) from the fitting 10 shown in FIG. 3, by grasping the knob 26 </ b> B of the pin 26 and pulling it with a strong force outward in the radial direction of the cap 18, The pin 26 is removed from the through hole 19 of the cap 18 and the hole 23 of the release ring 22. With the pin 26 removed from the through hole 19 of the cap 18 and the hole 23 of the release ring 22, the release ring 22 can be pushed into the back side of the insertion hole 20.

  In this state, as shown in FIG. 5, the release ring 22 is pushed inward from the inlet 20 </ b> A side of the insertion hole 20 using a dedicated jig (not shown). As a result, the distal end 22B of the release ring 22 pushes the claw 36 of the lock ring 30 to expand the diameter of the lock ring 30 (see FIG. 4B). At that time, the distal end portion 22B of the release ring 22 pushes the claw portion 36 of the lock ring 30 and at the same time enters between the claw portion 36 and the outer peripheral surface of the tube body 40, and the claw portion 36 becomes the outer peripheral surface of the tube body 40. Deviate from. In this state, the tube body 40 can be pulled out (detached) from the insertion hole 20.

  In such a pipe joint 10, the shaft portion 26 </ b> A of the pin 26 is inserted into the through hole 19 of the cap 18 and the hole portion 23 of the release ring 22, so that the release ring 22 moves to the back side of the insertion hole 20. Accordingly, it is possible to prevent the tube body 40 from coming off from the insertion hole 20 due to a malfunction of the release ring 22. Further, the end of the release ring 22 on the inlet 20A side of the insertion hole 20 is not exposed outward from the end face of the cap 18, and it is possible to prevent the enlargement and damage to the tube body 40.

  Next, the pipe joint which is 2nd Embodiment of this invention is demonstrated. In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment, and the overlapping description is abbreviate | omitted.

  FIG. 6 shows a state in which the pipe body 40 is coupled to the pipe joint 50 according to the second embodiment of the present invention. As shown in this figure, a male screw portion 62 is formed on the tip end side of the shaft portion 60A of the pin 60 as an insertion member. The cap 52 is formed with a female screw portion 54 into which the male screw portion 62 is screwed along the radial direction. Further, the release ring 56 is formed with a female screw portion 58 to which the male screw portion 62 is screwed along the radial direction. The female screw portion 54 is a position where the protrusion 22A of the release ring 56 contacts the small diameter portion 18B of the cap 52 (a position where the release ring 56 is not pushed into the back side of the insertion hole 20). 58 is connected, and the male screw part 62 of the pin 60 can be screwed together.

  In this pipe joint 50, the male threaded portion 62 of the pin 60 is screwed into the female threaded portion 54 of the cap 52 and the female threaded portion 58 of the release ring 56, so that the pin 60 is firmly attached to the cap 52 and the release ring 56. It is fixed. For this reason, the pin 60 can be prevented from being inadvertently detached from the cap 52 and the release ring 56. Accordingly, it is possible to more reliably prevent the release ring 56 from being pushed into the back side of the insertion hole 20 due to a malfunction, and to prevent the tube body 40 from coming off from the insertion hole 20.

  Further, when the tube body 40 is pulled out (detached) from the fitting 50 shown in FIG. 6, the pin 60 is turned in the direction opposite to the fastening direction of the male screw portion 62 and the female screw portion 54. 60 is removed from the female threaded portion 58 of the release ring 56 and the female threaded portion 54 of the cap 52. In this state, by pushing the release ring 56 into the back side of the insertion hole 20, the claw portion 36 of the lock ring 30 is detached from the outer peripheral surface of the tube body 40, and the tube body 40 is pulled out (removed) from the insertion hole 20. Can do.

  Next, the pipe joint which is 3rd Embodiment of this invention is demonstrated. In addition, the same code | symbol is attached | subjected to the member same as 1st and 2nd embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 7, in the pipe joint 70, a knob 72B made of a flange having a diameter larger than that of the shaft portion 72A is formed on the head portion of the shaft portion 72A of the pin 72 as an insertion member. The cap 18 is formed with a through hole 74 into which the shaft portion 72A is inserted. On the outer peripheral surface of the release ring 76, a step portion 76A to which the tip of the shaft portion 72A penetrating the through hole 74 is locked is formed. Is formed. The stepped portion 76A has a small diameter on the back side of the outer peripheral surface of the release ring 76. The tip of the shaft portion 72A is locked to the stepped portion 76A, so that the release ring 76 is axially back (FIG. 1). The rear side of the insertion hole 20 shown in FIG. Thereby, it is possible to prevent the release ring 76 from being pushed into the back side of the insertion hole 20 (see FIG. 1) due to a malfunction, and it is possible to prevent the tubular body 40 from coming off from the insertion hole 20.

  Further, when the pipe body 40 is pulled out from the pipe joint 70 from the mounting state shown in FIG. 7, the release ring 76 can be pushed into the back side of the insertion hole 20 by gripping the knob 72 </ b> B and pulling out the pin 72. The tube 40 can be pulled out (detached) from the insertion hole 20.

  Next, the pipe joint which is 4th Embodiment of this invention is demonstrated. In addition, the same code | symbol is attached | subjected to the member same as 1st-3rd embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 8, in the pipe joint 80, the shaft portion 72 </ b> A of the pin 72 is inserted into the through hole 19 of the cap 18, and the outer peripheral surface of the release ring 82 has a shaft at a position communicating with the through hole 19. A hole 82A into which the tip of the portion 72A is fitted is formed. By fitting the tip of the shaft portion 72A into the hole portion 82A, the release ring 82 is prevented from moving to the axially inner side (the inner side of the insertion hole 20 shown in FIG. 1). Thereby, it is possible to prevent the release ring 82 from being pushed into the insertion hole 20 (see FIG. 1) due to a malfunction, and to prevent the tubular body 40 from coming out of the insertion hole 20.

  Further, when the pipe body 40 is pulled out from the pipe joint 80 from the mounting state shown in FIG. 8, the release ring 82 can be pushed into the back side of the insertion hole 20 by gripping the knob 72B and pulling out the pin 72. The tube 40 can be pulled out (detached) from the insertion hole 20.

  In the first to fourth embodiments, the hole 23, the female screw portion 54, the stepped portion 76A, or the hole portion 82A into which the shaft portion of the pin is inserted is provided in the release ring. However, the present invention is limited to this configuration. It is not something. For example, any structure may be used as long as the distal end portion of the shaft portion of the pin abuts on the release ring to prevent the release ring from being pushed into the back side of the insertion hole 20 (in the insertion direction of the tube body 40). The taper surface which the front-end | tip part of the axial part of a pin contact | abuts may be provided in the back | inner side (insertion direction of the tubular body 40).

  In addition, in the said 1st-4th embodiment, while comprising the coupling main body 16 by the main-body part 12 and the intermediate part 14, and providing the cap 18 extrapolated by the intermediate part 14, it is not limited to this, Other It may be configured. For example, a configuration in which the intermediate portion 14 and the main body portion 12 are integrally formed without providing the cylindrical portion 12A, and a configuration in which the cap is integrally formed with the joint main body may be employed. Moreover, in the said 1st-4th embodiment, although the through-hole or the internal thread part was formed in the cap, it is not limited to this, A cap is formed integrally with a coupling main body, and a through-hole or an internal thread part is formed in a coupling main body. The structure which provides may be sufficient.

  In the second embodiment, the female screw part 54 is provided in the cap 52 and the female screw part 58 is provided in the release ring 56. However, the present invention is not limited to this. For example, an internal thread portion may be provided only on the cap (or joint body), the external thread portion of the shaft portion of the pin may be screwed together, and the tip end portion of the shaft portion may be in contact with the release ring.

DESCRIPTION OF SYMBOLS 10 Pipe joint 12 Main body part 14 Intermediate part 16 Joint main body 18 Cap 19 Through-hole 20 Insertion hole 20A Inlet 22 Release ring 22B Tip part 23 Hole part 26 Pin (insertion member)
26A Shaft part 30 Lock ring 31 Ring part 36 Claw part 40 Pipe body 50 Pipe joint 52 Cap 54 Female thread part 56 Release ring 58 Female thread part 60 Pin (insertion member)
60A Shaft part 62 Male thread part 70 Pipe joint 72 Pin (insertion member)
72A Shaft part 74 Through-hole 76 Release ring 76A Step part 80 Pipe joint 82 Release ring 82A Hole part

Claims (3)

A joint body in which an insertion hole into which the tubular body is inserted is formed;
A ring portion held by the joint body or a cap externally attached to the joint body; and an oblique extension toward an insertion direction of the tubular body inserted into the insertion hole on an inner peripheral side of the ring portion. A plurality of claw portions that bite into the outer peripheral surface of the tubular body and prevent the tubular body from being pulled out, and a lock ring comprising:
It is held closer to the inlet side of the insertion hole than the lock ring inside the joint body or the cap, and enters between the claw portion and the outer peripheral surface of the tube body so that the claw portion bites into the tube body. Release ring to release,
A through hole formed in the joint body or the cap in a radial direction;
An insertion member that is inserted into the through-hole and prevents the release ring from being pushed in a direction to release the claw portion from biting into the tubular body in contact with the release ring;
Pipe fittings with A hole is provided in the release ring;
The pipe joint according to claim 1, wherein the insertion member penetrates the through hole and is inserted into the hole portion so as to contact the release ring.   The pipe joint according to claim 2, wherein the insertion member is screwed to at least the through hole.

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