JP3510982B2 - Pipe fittings - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a pipe joint.

[0002]

2. Description of the Related Art There are various types of pipe joints for connecting pipes for flowing a fluid. For example, a pipe joint as shown in FIG. 8 has been proposed and has the following configuration. Reference numeral 80 denotes a joint body, and the tip end side of a collet ring 82 is fitted in the connection port of the pipe 42 of the joint body 80 so as to be movable in the axial direction. The collet ring 82 has a basically cylindrical shape into which the pipe 42 can be inserted, and a portion corresponding to the inner side of the connection port is divided into a plurality in the circumferential direction and has a claw portion 84 on the inner surface. The stopper 86 is provided. The collet ring 82 is guided by the inner wall guide portion of the joint body 80 by being pulled in the direction of the outlet of the connection port, and the tip end portion of each locking piece 86 moves inward to be narrowed, and the claw portion 8 is formed.
An inclined surface 88 that inclines so as to spread toward the inner side of the connection port on the outside of the locking piece 86 so that 4 is inserted into the outer wall of the pipe.
Are formed. Further, a through hole 90 extending in the axial direction is formed in the joint body 80 corresponding to the tip of the locking piece 86. Then, when the collet ring 82 is pushed so as to project into the through hole 90 into each of the locking pieces 86 and to remove the bite of the claw portion 84 from the tube to pull out the tube, the corresponding joint main body 80 Riding on the through-hole wall surface 92 of the locking piece 8
A protrusion 94 is formed to spread 6 outwardly.

Reference numeral 96 is a locking step, which is a locking piece 86.
When the collet ring 82 moves rearward, the collet ring 82 contacts the inner wall 90a of the through hole 90 and restricts the movement of the collet ring 82. This can prevent the collet ring 82 from coming off the joint body 80. A screw portion 98 for screwing the pipe joint to a pressure device (not shown) or the like is provided on the left end side of the joint body 80. Further, 99 is an elastic ring, which is formed in a ring shape by using a rubber material, and is in close contact with the outer wall of the inserted tube and the inner surface of the joint body to prevent fluid leakage.

According to the conventional pipe joint described above, after the pipe 42 is inserted into the joint main body 80, the pipe 42 is moved together with the collet ring 82 in a direction in which the pipe 42 is slightly pulled out, so that the claw portion 84 of the collet ring 82 is moved. The outer wall of the tube 42
Can be prevented from getting out. The collet ring 8
When the inner side of the pipe joint becomes high in pressure, the elastic body ring 99 that moves in the direction of coming out of the joint body 80 moves the collet ring 82 when the inner side of the pipe joint becomes high pressure. It can also be done by pressing. Further, by pushing the collet ring 82, the locking piece 86 is opened and the biting of the claw portion 84 into the tube 42 is released, and the tube 42 can be pulled out.

[0005]

However, in the conventional pipe joint as described above, when the pipe 42 moves together with the collet ring 82 in a direction to be slightly pulled out, the claw portion 84 is embedded in the outer wall of the pipe 42 and the pipe 42 is removed. This prevents the pipe 42 from coming off, and allows the pipe 42 to move (swing) in the inserting / removing direction. Therefore, the pipe 42 easily swings in the axial direction (the inserting / removing direction) due to the pulsation due to the change in the air pressure, and at that time, the sealing property (airtightness) is slightly increased.
There was a problem that was easily lost.

The backward movement of the collet ring 82 is regulated by the engagement step 96 contacting the inner wall 90a of the through hole 90, but the tip of the engagement piece 86 is not directly regulated. As a result, the claw portion 84 may further fit into the outer wall of the tube 42, and the tube 42 may be greatly deformed. Due to the large deformation of the pipe 42 in this way, there arises a problem that the sealing property for connecting the pipe 42 is deteriorated and a resistance applied to a fluid flowing in the pipe increases. Further, when the claw portion 84 is inserted into the pipe 42 more than necessary and the diameter of the insertion portion of the collet ring 82 inserted into the joint main body 80 is excessively reduced, the collet ring 82 and the pipe 42 are integrated. There is also the problem of getting out.

Further, in the conventional pipe joint, the shapes of the collet ring 82 and the joint body 80 are complicated. Therefore, in manufacturing this pipe joint, when molding with plastic (resin), a mold of complicated shape is required,
It was difficult to manufacture the mold. Further, since the space is limited, it is difficult to mold the protrusion 94 with a resin material into a shape having sufficient strength. Therefore, there is a problem that it is difficult to mold all the parts with the resin material. In addition, since the conventional pipe joint has a complicated shape, it is difficult to manufacture it from metal.

Therefore, an object of the present invention is to provide a pipe joint which has a structure which is easy to manufacture and which can improve the sealing performance by restricting the movement of the pipe in the inserting / removing direction.

[0009]

In order to solve the above problems, the present invention has the following constitution. That is, the present invention corresponds to a joint main body having a tubular side peripheral wall into which a pipe can be inserted, and having a plurality of openings provided at a plurality of positions of the side peripheral wall, and an opening of the joint main body. And each is provided,
One end part, which is disposed in the support part so as to be rotatable with respect to the joint main body at an intermediate part and in which the outer side surface is exposed from the opening part, and which is a rear end part into which the pipe is inserted. A claw portion that protrudes into the outer wall of the inserted tube to prevent the tube from being pulled out is provided inside, and at the one end portion of the outer surface, a one-end protruding portion that projects outward is formed, and the outer surface is formed. A plurality of claw bodies having the other end convex portion projecting outwardly at the other end of the pipe and the fitting main body, and arranged so as to be movable in the pipe inserting / removing direction, in the middle of the pipe inserting / removing direction. Portion has a reduced diameter inner peripheral portion provided with a reduced inner diameter, and when moved in the inserting direction of the pipe, the reduced diameter inner peripheral portion abuts on one end convex portion of the claw body. By pressing and rotating the one end portion inwardly, the claw portion bites into the outer wall of the pipe,
When the pipe is moved in the pulling-out direction, the reduced-diameter inner peripheral portion abuts on the other end convex portion of the claw body and pivots the one end portion to the outer wall of the pipe of the claw portion. And a lock sleeve for releasing the bite of the joint, and a ring that is fitted inside the joint main body on the inner side of the claw body and seals between the inner peripheral surface of the joint main body and the outer peripheral surface of the inserted pipe. And a seal member.

Further, the plurality of claw bodies and a support portion for supporting the plurality of claw bodies are basically formed into a tubular shape into which a pipe can be inserted, and the claw body is the middle portion of the claw body ,
A sleeve with a claw body integrally formed so as to be coupled and supported by the support portion via an elastic coupling portion having a small cross-sectional area and easily elastically deformed, and the sleeve with the claw body is fitted in the joint body. By doing so, each claw body is disposed so as to be rotatable with respect to the joint body at an intermediate portion, so that the claw body can be easily and suitably manufactured with the resin material.

Further, the plurality of claw bodies and a supporting portion for supporting the plurality of claw bodies are basically formed into a tubular shape into which a pipe can be inserted, and the plurality of claw bodies are the above-mentioned claw bodies. A claw body shaft-attaching sleeve rotatably and rotatably supported by the support portion in the middle portion is provided, and the claw body shaft-attaching sleeve is fitted in the joint body, whereby each claw body is attached in the middle portion. The pipe joint, which is arranged so as to be rotatable with respect to the joint body, can reliably limit the movement of the pipe in the insertion / removal direction and improve the sealing performance, and can be easily and suitably manufactured from a resin material. .

An outer surface taper portion is formed at one end portion of the outer surface of the claw body so as to project outward as it goes to the one end side. The one end, which is the end on the far side into which the pipe is inserted, has an inner taper portion formed so as to increase in diameter toward the one end, so that one end of the claw body can be pressed appropriately. Then, the claw portion can be appropriately bited into the outer wall of the tube, and the tube can be appropriately prevented from coming off.

Further, a diameter-increasing step is formed at a tip portion of the joint body opposite to a portion connected to the pipe by the claw body so as to be enlarged in diameter and form a step portion so as to be connectable to another communication passage. Part is formed, and the diameter-increasing step part is provided with a locking part in which a slit is formed so that the diameter can be reduced, and another communication path is provided on the side where the claw body is arranged with respect to the locking part. Since the step portion is formed so as to be sealable via the ring-shaped seal member, the pipe joint itself can be easily and suitably connected to another communication passage with a simple shape.

[0014]

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. (First Embodiment) FIGS. 1 and 2 are sectional views showing an embodiment (first embodiment) of a pipe joint according to the present invention, in which a pipe inserted in the right half of the center line of FIG. 2 shows a state in which the claw body is rotated so that the claw part bites into the outer wall of the tube, and the claw part is released from the center line of FIG. 2 so that the bite of the claw part into the outer wall of the inserted tube is released. The body is shown rotated. 3 to 5 are drawings for explaining the claw sleeve of the first embodiment, FIG. 3 is a front sectional view, FIG. 4 is a side sectional view, and FIG. 5 is a sectional view taken along line XX of FIG. .

Reference numeral 10 denotes a joint body, which is provided with a cylindrical side peripheral wall 12 into which a pipe 42 can be inserted, and has a plurality of openings 14 provided at a plurality of positions on the side peripheral wall 12. In addition, in this embodiment, a claw body 20 of the joint body 10 described later is used.
The tubular side peripheral wall 1 which is a portion connected to the pipe 42 by
A locking portion 16 is provided at the tip end on the side opposite to 2, so that it can be connected to another communication passage with one touch. The locking portion 16 has a diameter-increasing stepped portion 16a that is expanded in diameter to form a stepped portion.
Is formed, and a slit 16b is formed so that the enlarged diameter step portion 16a can be reduced in diameter. Reference numeral 18 denotes a stepped portion, which is provided on the side where the claw body 20 described later is arranged with respect to the locking portion 16 via another communication passage and a ring-shaped seal member (for example, an'O'-ring 38). It is formed to be airtight (seal). This allows the pipe joint itself to be easily and suitably connected to another communication passage with a simple shape.

Reference numeral 20 denotes a claw body, which is provided corresponding to each opening 14 of the joint body 10 and has the joint body 10
On the other hand, it is rotatably disposed at the midway portion 22 and is disposed such that the outer side surface 25 is exposed from the opening 14. In the claw body 20, a claw portion 24 that prevents the tube 42 from being pulled out by cutting into the outer wall of the tube 42 that is inserted inside the one end 21 that is the rear end into which the tube 42 is inserted.
Is projected. In addition, in this claw body 20, one end convex portion 26 protruding outward is formed at one end portion 21 of the outer side surface 25, and the other end convex portion 27 protruding outward is formed at the other end portion 23 of the outer side surface 25. Has been formed. Further, in the present embodiment, the outer surface taper portion 28 is formed on the one end portion 21 of the outer side surface 25 of the claw body 20 so as to project outwardly toward the one end 21a side. The claw portion 24
Has a sharp tip so as to bite (lock) into the outer wall of the pipe 42 suitably, and has an arc shape so that it can be locked with a line following the outer wall shape of the pipe 42 as shown in FIG. Is formed in.

Reference numeral 30 denotes a lock sleeve, which is the joint body 1
It has a diameter-reduced inner peripheral portion 32 which is fitted to 0, is arranged so as to be movable in the insertion / removal direction of the pipe 42, and has a reduced inner diameter in the middle of the extraction / removal direction of the pipe 42. When the lock sleeve 30 is slid (moved) in the inserting direction of the pipe 42, the reduced-diameter inner peripheral portion 32 contacts the one end convex portion 26 of the claw body 20 and presses the one end portion 21 inward. Let Thereby, the claw portion 24 is attached to the outer surface (outer wall) of the pipe 42.
Can be cut into. Further, when the lock sleeve 30 is moved in the pull-out direction of the pipe 42,
The reduced-diameter inner peripheral portion 32 abuts on the other end convex portion 27 of the claw body 20 to rotate the one end portion 21 to the outside so that the tube 4 of the claw portion 24 can be rotated.
Release the bite of 2 to the outer wall.

In the present embodiment, the lock sleeve 3
An inner taper portion 35 is formed on one end side, which is an end portion on the inner side into which the tube 42 of the diameter-reduced inner peripheral portion 32 of 0 is inserted, the inner surface taper portion 35 having a diameter increasing toward the end side.
Due to the inner taper portion 35, when the lock sleeve 30 is moved in the inserting direction, the one end portion 2 of the claw body 20 is
The outer taper portion 28 provided on the No. 1 can be suitably pressed by a wide surface. Since it can be suitably pressed in this way, the claw portion 24 can surely bite into the outer wall of the tube 42, and the tube 42 can be prevented from coming off properly and reliably.

Also, in the first embodiment, the lock sleeve 3
The inner peripheral portion 31 at one end and the inner peripheral portion 33 at the other end of 0 are formed to have larger diameters than the diameter-reduced inner peripheral portion 32 in the middle. The inner peripheral portion 31 at one end and the inner peripheral portion 33 at the other end have a constant inner diameter at least in a predetermined section. Since the lock sleeve 30 is formed in this manner, the rotation of the claw body 20 can be appropriately restricted within a predetermined range. That is, when the one end portion 21 of the claw body 20 is rotated inward and the claw portion 24 bites into the outer surface of the pipe 42, the other end convex portion 27 of the claw body 20 moves to the inner peripheral portion 33 of the other end portion. Contact the inner surface. This can prevent the one end portion 21 of the claw body 20 from rotating more inward than necessary. In addition, one end 2 of the claw body 20
When 1 is rotated outward, one end of the claw body 20 has a convex portion 2
Rotation of the claw body 20 can be regulated so that 6 contacts the inner surface of the inner peripheral portion 31 at one end and does not rotate further. Therefore, tighten the pipe 42 more than necessary and
It is possible to prevent the passage from being reduced. Also, claw body 2
It is possible to prevent 0 from rotating more than necessary and causing plastic deformation of the elastic connecting portion, which will be described later.

Reference numeral 40 is a ring-shaped sealing member, and for example, an'O'-ring may be used as in this embodiment.
The ring-shaped seal member 40 is fitted inside the joint body 10 farther from the position where the claw body 20 is arranged, and between the inner peripheral surface of the joint body 10 and the outer peripheral surface of the pipe 42 to be inserted. Seal. Reference numeral 17 denotes a step portion, which is formed in a step shape inside the joint body 10 so that the ring-shaped seal member 40 is appropriately positioned. In addition, the ring-shaped seal member 40
Is not limited to the'O'-ring as in the present embodiment, but is made of an elastic material such as synthetic rubber and is fitted into the joint body 10 to form an inner peripheral surface in the joint body 10 and an outer peripheral surface of the pipe 42. Anything that seals between

Reference numeral 50 denotes a claw sleeve, and a plurality of claw bodies 20 and a supporting portion 5 for supporting the plurality of claw bodies 20.
2 and the tube 42 are basically formed into a cylindrical shape into which the tube 42 can be inserted. As shown in FIGS. 3 to 5, the claw-shaped treebub 50 has a support portion 52 at the middle portion 22 of the claw body 20 via an elastic connection portion 54 having a small cross-sectional area and easily elastically deformed.
Is integrally formed so as to be connected to and supported by. Further, the support portion 52 is in a state of being integrally connected by the lower ring portion 56, and the ring portion 56 is received by the inner diameter stepped portion 19 formed inside the joint body 10 to form the joint body. It is formed so as to be mounted (fitted) at a predetermined position within 10. In this embodiment, 180 of the ring portion 56
A support portion 52 extending in the pulling direction of the pipe 42 at two positions symmetrical with respect to each other.
Are provided, and the claw bodies 20 are arranged at two positions between the support portions 52. The present invention is not limited to this, and it goes without saying that the support portion 52 and the claw body 20 may be provided at three or more locations on the circumference.

By fitting the sleeve with claw body 50 in the joint body 10, each claw body 20 can be easily and suitably rotated with respect to the joint body 10 at the midway portion 22 thereof. Can be installed at That is, by manufacturing the sleeve with claw body 50 separately and incorporating it into the joint body 10, the pipe joint of the first embodiment can be easily and suitably molded with a resin material in a molding die. . Each claw body 20 is arranged so as to be rotatable about an axis in a direction orthogonal to the axis of the pipe joint and in a direction in contact with a circumferential line drawn around the axis of the pipe joint. ing.

Reference numeral 58 denotes a claw retainer, which is formed in a ring shape and is fitted (internally fitted) inside the end portion of the tubular side peripheral wall 12 of the joint body 10. In this embodiment, the male step portion 58a provided at the insertion tip of the tab retainer 58 is press-fitted into the female step portion 14a formed by forming the opening 14 in the cylindrical side peripheral wall 12. It is fixed by fitting it. The inner diameter of the claw retainer 58 is provided so that the tube 42 can be inserted therein, and is slightly larger than the diameter of the tube 42. According to the claw presser 58, the fitted claw body-equipped sleeve 50 can be pressed so as not to come out, and movement of the claw body 20 in the direction of coming out can be restricted. That is, the rear end 23a of the claw body 20 abuts on the inner end surface 59 of the claw presser 58, and the claw body 20 no longer extends.
Can be prevented from moving. Therefore, it is possible to prevent (restrict) the movement (swing) of the pipe 42, which is prevented from coming off by the claw body 20, in the inserting / removing direction, and the sealing property of the pipe 42 with respect to the pipe joint can be improved.

According to the above construction, the shapes of the respective parts are not complicated, and the resin material can be formed relatively easily by the molding die. Therefore, the pipe joint, which has high quality and reliability and high sealing performance, can be preferably configured by the resin material except for the seal member. Thereby, it can be preferably used in a field where metal contamination is a problem, for example, in the fields of chemicals and semiconductors. Further, according to the present invention, since the pipe 42 (for example, the resin tube for air pressure) is prevented from coming off by sliding the lock sleeve 30, the lock mechanism is a reliable lock mechanism. In particular, the claw body 20 does not swing in the axial direction (the direction in which the tube 42 is inserted and removed), so that the sealing property thereof is high.

Reference numeral 45 denotes a screw main body, the locking portion 16 of the joint main body 10 is fitted inwardly in a sealed state via an'O'-ring 38, and the pipe joint itself is provided on the outer peripheral surface with a pressure device ( A screw portion 46 (male screw) for screwing to (not shown) or the like is formed. In the present embodiment, the engagement portion 16 is fitted into the screw body 45 by fitting the above-mentioned expanded step portion 16a into the step portion 47 formed in the screw body 45, and the joint body 10 is fitted into the screw body 45. Connected / fixed. In addition,
The outer portion of the portion in which the step portion 48 for receiving the'O'-ring 38 is formed has a shape corresponding to the hexagonal bolt head 49.

Further, the screw body 45 can be made of a metal material formed by cutting, for example, brass having good machinability or stainless steel having corrosion resistance.
Of course, a synthetic resin material (resin material) may be used as long as it has specifications such as strength that can withstand the usage conditions.
In addition, in the first embodiment, the threaded portion 46 is added to the joint body 10 by the separate threaded body 45, but the present invention is not limited to this, and the threaded portion is not provided with the locking portion 16 as a component. It goes without saying that 46 may be formed integrally with the joint body 10. That is, the method of connecting the pipe joint itself to other communication passages is not particularly limited, and various connecting means may be selectively adopted.

(Second Embodiment) Next, regarding the second embodiment,
This will be described with reference to FIGS. 6 and 7. The same components as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Reference numeral 60 denotes a claw body shaft-attaching sleeve, which is basically configured by a plurality of claw bodies 20A and a support portion 62 supporting the plurality of claw bodies 20A into a tubular shape into which a tube can be inserted. The plurality of claw bodies 20A are pivotally supported on the support portion 62 at the midway portions 22 of the claw bodies 20A. That is, as shown in FIG. 7, the claw body 2 formed separately from the sleeve body 64 of the claw body shaft mounting sleeve 60.
0A is axially attached by fitting a shaft portion 68 protruding left and right into a shaft hole 66 formed in the sleeve body 64.
In this embodiment, the shaft portion 68 is rotatably attached to the shaft hole 66 by being pushed into the shaft hole 66 from a direction orthogonal to the shaft center.

The claw body shaft mounting sleeve 60 having the above-described structure is fitted in the joint body 10 so that each claw body 20A can rotate with respect to the joint body 10 at the midway portion 22. Will be installed in. The sleeve main body 64 of the claw body shaft-attaching sleeve 60 is basically a tubular body into which the tube 42 is inserted, and the portion to which each claw body 20A is axially attached is a through hole 65. In this embodiment, the two claw bodies 20
Although A is provided, it goes without saying that three or more claw bodies 20A may be provided. In this embodiment, the male step portion 64a provided at the other end of the sleeve body 64 is press-fitted into the female step portion 14a formed by forming the opening 14 in the cylindrical side peripheral wall 12. It is fixed by fitting it. That is, the sleeve body 64 has a form in which the claw retainer 58 of the first embodiment is integrally molded, and can be suitably fitted to the joint body 10.

Further, since the shaft portion 68 of the claw body 20A is axially attached to the shaft hole 66 of the sleeve body 64, the claw body 20A can be rotated, but the movement of the pipe 42 in the inserting / removing direction can be prevented. That is, the rocking of the pipe 42 caused by the change in the pressure of the pressure device to which the pipe joint is connected can be surely limited to improve the sealing performance. Further, the shapes of the claw body 20A and the sleeve main body 64 are not complicated as compared with the shapes of the conventional example, and can be easily and suitably manufactured with a resin material.

Although the pipe joint of the above-mentioned embodiment is formed with the locking portion 16 for fixing on one end side for mounting the equipment, it is not limited to this, and the pipe joint for relay, elbow, T
The present invention can be similarly applied to various types of pipe joints such as shape and Y-shape, and the size and shape of the claw body 20, the shape and the number of the claw portions 24, etc. can be adapted to each pipe joint. And design appropriately. Although various preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. is there.

[0031]

As described above, according to the pipe joint of the present invention, the lock sleeve which is externally fitted to the joint body and has the reduced diameter inner peripheral portion,
The tube can be connected by rotating the claw body rotatably arranged in the middle of the joint body, and the claw portion provided on the claw body biting into the outer wall of the tube. According to this, the shape of each component does not become complicated, and it can be easily formed of a resin material or the like by the molding die. Therefore, the pipe joint with high quality and reliability can be manufactured conveniently and easily. Further, the lock sleeve is slid to rotate the claw body to prevent the pipe from coming off, so that a reliable lock mechanism is provided. As a result, the claw body is restricted from swinging in the inserting / removing direction,
A remarkable effect that the sealing performance can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of a pipe joint according to the present invention.

FIG. 2 is a cross-sectional view illustrating an unlocked state of a claw portion according to the first embodiment.

FIG. 3 is a front sectional view illustrating a sleeve with a claw body according to the first embodiment.

FIG. 4 is a side sectional view illustrating a sleeve with a claw body according to the first embodiment.

5 is a cross-sectional view taken along line XX of FIG.

FIG. 6 is a cross-sectional view showing a second embodiment of the pipe joint according to the present invention.

FIG. 7 is a plan sectional view of a second embodiment.

FIG. 8 is a cross-sectional view showing an example of a conventional pipe joint.

[Explanation of symbols]

10 Joint body 12 side wall 14 openings 16 Locking part 20 claw body 20A claw body 21 One end 22 Midway 23 The other end 24 Claws 25 outer surface 26 One end convex part 27 convex part on the other end 28 External taper 30 lock sleeves 31 Reduced inner diameter 35 Inner taper 40 Ring-shaped sealing member 42 tubes 45 screw body 50 Sleeve with claw body 52 Support 54 Elastic connection 58 Claw foot 60 Claw body mounted sleeve 62 Support 64 sleeve body 66 shaft hole 68 Shaft

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16L 37/16 F16L 21/08

Claims (5)

(57) [Claims] 1. A joint main body having a tubular side peripheral wall into which a pipe can be inserted, the joint main body having a plurality of openings provided at a plurality of positions of the side peripheral wall, and the opening corresponding to the joint main body. Each provided and supported
Part of the one end part which is rotatably arranged with respect to the joint main body at an intermediate part, and is arranged in a state where the outer surface is exposed from the opening part, and which is an end part on the far side into which the pipe is inserted. On the inside, a claw portion that protrudes into the outer wall of the inserted tube and blocks the withdrawal of the tube is provided in a protruding manner, and at the one end portion of the outside surface, one end protruding portion that protrudes outward is formed, and the outside surface of the outside surface is formed. A plurality of claw bodies having the other end projecting outwardly formed at the other end, and the claw body that is fitted onto the joint body and is movably arranged in the pipe inserting / removing direction. Has a reduced diameter inner peripheral portion provided with a reduced inner diameter, and when moved in the insertion direction of the pipe, the reduced diameter inner peripheral portion abuts one end convex portion of the claw body and Pushing and rotating one end inward causes the claw part to bite into the outer wall of the pipe and moves in the pipe withdrawal direction. When moved, the reduced-diameter inner peripheral portion abuts on the other end convex portion of the claw body to rotate the one end portion outward, thereby canceling the bite of the claw portion into the outer wall of the pipe. A lock sleeve, and a ring-shaped seal member that is fitted inside the joint main body on the inner side of the claw body and seals between the inner peripheral surface of the joint main body and the outer peripheral surface of the inserted pipe. A pipe joint provided with. 2. A tube is basically configured by the plurality of claw bodies and a support portion supporting the plurality of claw bodies into which a pipe can be inserted, and the claw body is the middle portion of the claw body , A claw body-equipped sleeve integrally formed so as to be connected to and supported by the support portion via an elastic coupling portion having a small cross-sectional area and easily elastically deformed, and the claw body-equipped sleeve is fitted in the joint body. The pipe joint according to claim 1, wherein each of the claw bodies is disposed so as to be rotatable with respect to the joint main body at an intermediate portion thereof. 3. A tube is basically formed by the plurality of claw bodies and a support portion that supports the plurality of claw bodies into a tube shape, and the plurality of claw bodies are the claw bodies. A claw body pivoting sleeve rotatably and rotatably supported by the support portion at the midway portion is provided, and the claw body pivoting sleeve is fitted into the joint body, whereby each claw body is moved at the midway portion. The pipe joint according to claim 1, wherein the pipe joint is arranged so as to be rotatable with respect to the joint body. 4. An outer surface taper portion is formed at one end portion of an outer surface of the claw body so as to project outward as it goes to the one end portion. The inner surface taper part provided so that a diameter may be expanded as it goes to this one end side is formed in one end part which is an end part at the back side into which a pipe is inserted. The described pipe fitting. 5. A diameter-increasing step formed at a tip end portion of the joint body opposite to a portion connected to the pipe by the claw body so as to be enlarged in diameter to form a step portion so as to be connectable to another communication passage. Part is formed, and the diameter-increasing stepped part is provided with a locking part in which a slit is formed so that the diameter can be reduced, and another communication path is provided on the side where the claw body is arranged with respect to the locking part. The stepped portion is formed so as to be capable of sealing via a ring-shaped sealing member.
The described pipe fitting.