JP2006177476A - Spigot type pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spigot type pipe joint capable of connecting a corrugated tube in a correct fitted state in a short time by inserting it into the pipe joint with a light force, securing a secure seal performance, manufacturable at low cost, and enabling the easy control thereof in working. <P>SOLUTION: In this spigot type pipe joint for connecting a flexible tube formed of the corrugated tube, a retainer ring is screwed into a joint body and a retainer and a seal material are disposed in the retainer ring. A ring held on the retainer ring by engaging with the tip part thereof is fitted to the bottom end side of the joint body. The corrugated tube is inserted and its tip is held on the ring. In this state, when the corrugated tube is pulled in a drawing direction, a retainer in contact with the inner peripheral circular arc surface of the retainer ring through the moving seal material is rotatingly deformed in the radial inner direction and engaged with the bottom part of the corrugated tube to restrict the further drawing thereof. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an insertion-type pipe joint for connecting a flexible tube used for gas piping or the like with one touch.

  Conventionally, the joint of FIG. 9 disclosed by patent document 1 is known as a pipe joint which connects the flexible pipe | tube which flows fluids, such as gas. The pipe joint is disposed on the inner side of the cylindrical main body 152 having the sealant accommodating portion 150 therein, a push ring 154 whose tip is screwed into the cylindrical main body 152, and the push ring 154 inside the cylindrical main body 152. The retainer 156 and an annular seal member 158 disposed in the sealant accommodating portion 150 of the cylindrical main body 152 on the back side of the retainer 156 are provided. The flexible tube 160 connected to the joint is composed of a thin stainless corrugate tube 162 and a synthetic resin tube-shaped covering 164 covering the outer periphery of the corrugate tube. In a state where the cover 164 is removed, it is inserted from the end of the pusher wheel 154 toward the inside of the pusher wheel 154, the retainer 156, the annular seal member 158, and the cylindrical main body 152. Then, the peak portion 166 of the corrugate tube pushes the protrusion 168 of the retainer 156, passes through the protrusion 168, and is press-fitted into the inner periphery of the annular seal member 158, thereby completing the joining. At this time, the rear end portion of the corrugate tube 162 is provided in a portion on the inner peripheral side with respect to the seal material, and protrudes from the rear end of the cylindrical main body 152 toward the opening side of the presser wheel 154. It is inserted into the gap between the portion 170 and the annular seal member 158. At this time, the protrusion 168 of the retainer 156 is reduced in diameter by the action of the ring spring 172 and is engaged with the valley 174 of the corrugate tube. When the pulling-out force from the joint is applied to the flexible tube 160, the outer peripheral taper surface 176 of the retainer 156 engaged with the valley 174 of the corrugate tube comes into contact with the inner peripheral taper surface 178 of the push ring 154, and the retainer 156 In order to receive a radially inward force, the protrusion 168 of the retainer 156 presses the outer periphery of the valley portion 174 of the corrugate tube, and prevents the flexible tube 160 from coming out of the joint.

Japanese Patent No. 3288343

  The above-described conventional plug-in pipe joint of Patent Document 1 inserts a corrugate pipe 162 into the inner peripheral portion of the annular seal member 158 in the joint, thereby sealing the joint and the corrugate pipe. However, it is difficult to integrally form the thin ring-shaped annular protrusion 170 on the back end side of the cylindrical main body 152, and there is a problem in that the manufacturing efficiency is inferior and the manufacturing cost is high. In addition, in order to improve the sealing performance when inserting a corrugate tube having a wave-like shape with continuous ridges and valleys and having dimensional tolerances, the insertion resistance of the corrugate tube is increased by reducing the inner peripheral diameter of the annular seal member. Therefore, a large force is required when the operator inserts. On the other hand, if the inner diameter of the annular seal member is increased in order to reduce the insertion resistance, the sealing performance deteriorates. Therefore, high accuracy is required for the formation of the annular protrusion 170 and the annular seal member 158, and the setting and adjustment of the dimensions. This was a further factor in the decline and high manufacturing costs. In addition, it is not easy to correctly insert the tip of the corrugate tube into the narrow gap between the sealing material and the annular protrusion, and it takes a long time to work and there is a risk that the operation will end with an inappropriate insertion. Furthermore, when the flexible tube is inserted into the pipe joint, the peak portion of the corrugate pipe pushes the protrusion of the retainer, passes through this protrusion, is press-fitted into the inner periphery of the annular seal member, and is inserted for joining. There was a great resistance, and the insertion work was difficult and time consuming. Moreover, in order to hold the retainer in a reduced diameter state, parts such as a ring spring used as an integral part of the retainer are necessary, which increases the number of parts, which is a disadvantage in assembly work and parts management. . Furthermore, in the conventional structure, in order to confirm that the corrugate pipe has been inserted at an appropriate position, it is necessary to mark the insertion position of the corgate pipe in advance, which increases the assembly work process and takes time. It was.

  The present invention has been made in view of the above-described conventional problems. One object of the present invention is to insert a corrugate pipe into a pipe joint with a light force and connect it in a correct fitting state in a short time. An object of the present invention is to provide a plug-in type pipe joint capable of ensuring performance. Another object of the present invention is to provide a plug-in type pipe joint that is easy to manufacture and low in cost, and that connects a corrugate pipe and a pipe joint by an easy connection operation. In addition, another object of the present invention is to perform connection work with a small number of parts without specially performing preparations for marking or other plug-in connection prior to plug-in connection work of a corrugate pipe to a pipe joint. An object of the present invention is to provide a plug-in type pipe joint capable of performing the following.

  In order to achieve the above object, the present invention provides a plug main body 12 having an inner wall surface formed in a stepped shape in a plug-in pipe joint for connecting a flexible tube 1 formed by a corrugate pipe 4, and a tip. A pusher 14 whose portion is screwed into the joint body, a retainer 38 having an inner diameter formed larger than the maximum diameter of the corrugate tube 4 and a seal member 42 disposed in the pusher 14 on the back side of the retainer. The corrugate is provided inside the joint body 12 on the inner side of the seal material and abuts against the tip of the corgate pipe when the corgate pipe 4 is inserted, and a part of the corgate is elastically expanded and contracted in the radial direction of the corgate pipe. A ring 32 that grips the tip of the tube, and the corrugate tube 4 can be inserted from the end of the pusher wheel 14 toward the inside of the pusher wheel 14, the retainer 38, and the joint body 12. The tip of the gate tube 4 is configured to be press-fitted into the sealing material 42, and when the corgate tube 4 is inserted from the end of the pusher wheel 14 toward the inside of the pusher wheel 14, the ring 32 disposed on the back side of the sealing member 42. After the tip of the corrugate tube is gripped, the ring 32 and the sealing material 42 are moved in the axial direction by pulling in the pulling direction, and the retainer 38 that contacts the inner circumferential arc surface 46 of the press ring 14 by the end surface of the sealing material 42 is compressed. From the plug-in pipe joint 10, the entire corrugate pipe 4 is pulled out without moving the sealing member 42 when it is pulled out in a state where it is rotationally deformed in the radial direction and engages with the corrugate pipe 4 while the gripping by the ring 32 is insufficient. Composed. With such a configuration, the insertion of the corrugate pipe 4 into the pipe joint receives only the resistance of the press-fitting of the seal packing without contacting the retainer, so that the inner surface of the seal packing can be passed with a light force. . At this time, since the seal packing is made of a material containing a lubricant, it can be inserted more smoothly.

  At that time, the retainer 38 is formed on the inner periphery of the one end side and radially inwardly projecting portion 381 for engaging with the corrugate tube 4 valley portion 3, and on the inner side of the push ring 14 formed on the other end side outer periphery portion. An outer circumferential arc surface 382 for contacting the circumferential arc surface 46 and performing rotational deformation in the reduced diameter direction, and an axial cut 383 formed at a plurality of positions along the circumferential direction from one end side to the other end side, The thin-walled portion 384 for deformation formed on the other end side may be used. When the corrugate pipe 4 is inserted into the pipe joint 10, the corgate pipe 4 passes through the ring-shaped retainer 38 and the seal packing 42, and the tip of the corgate pipe 4 abuts on the ring 32 to expand and contract a part of the ring 32. While being gripped in the ring 32. In this state, when a force is applied to the corrugate tube 4 in the pulling direction, the ring 32 and the seal packing 42 move together in the pulling direction and transmit the pulling direction force to the retainer 38. By the action of the circular arc surface 46 on the circumference and the circular arc surface 382 on the outer periphery of the retainer 38, the retainer 38 can be rotationally deformed in the reduced diameter direction and engaged with the corrugate tube 4 with a small resistance and a short moving distance. At this time, the seal packing 42 is compressed by the ring 32 and the retainer 38 to improve the sealing effect.

  Further, the ring 32 has a ring base 320 having an inner diameter larger than the maximum diameter of the corrugate tube 4, and protrudes in the inner diameter direction from the ring base 320 and elastically expands / contracts in the radial direction of the corgate tube 4 when the corgate tube 4 is inserted. However, the first inner peripheral protrusion 321 for inserting the peak portion 2 of the corrugate tube into the inner side and the first inner peripheral protrusion 321 protruding in the inner diameter direction from the ring base 320 are alternately arranged, and the first A second inner peripheral protrusion 322 is disposed at a different length and angle from the inner peripheral protrusion 321 and has a protrusion 322A at its tip to restrict the entry of the corgate pipe 4 and prevent the corgate pipe 4 from swinging. And an outer peripheral protrusion 323 that is provided on the outer periphery of the ring base 320 and elastically expands in the circumferential direction to engage with the joint body 12. When a force acts in the pulling direction in a state where the tip of the corrugate tube 4 is not gripped by the ring 32 in the joint body 12, that is, the corrugate tube 4 is not inserted to an appropriate position, the corgate tube 4 Therefore, the joint between the pipe joint and the corrugate pipe 4 in an incomplete state is reliably prevented.

  Further, a plate 40 that prevents the seal material 42 from being caught in the retainer slit 383 due to the rotational deformation of the retainer may be disposed between the retainer 38 and the seal material 42.

  According to the plug-in type pipe joint of the present invention, the corrugate pipe and the joint can be used without any other work other than the work of inserting the flexible tube into the plug-in type pipe joint and pulling it for confirmation of joining. Can be securely sealed and joined together. Further, the corrugate tube and the retainer do not come into contact with each other and can be inserted with a light force. In addition, the retainer outer circumferential surface and the inner surface of the press ring are formed into arcuate surfaces, allowing the corrugate tube and the retainer to be engaged with a short margin, and the retainer rotates and contracts along the arc even when a large pulling force is applied. As a result of the strong engagement with the valley of the corrugate tube, it is possible to reliably prevent the flexible tube from coming out of the joint. In particular, the push ring does not come out from the joint body by screwing in, and the corrugate pipe is moved by a large radial protrusion via the arc rotation of the retainer by a series of almost one-touch operations for inserting and extracting the corgate pipe. Since a sufficient space can be secured between the maximum diameter of the pipe and the inner diameter of the retainer, it is possible to adjust the gap between them and to make the retainer easier to manufacture, and to make the corgate pipe insertion work easier and smoother. Is possible. In addition, since the corrugate tube is engaged with the ring in the joint body and the joint and flexible tube are joined by the pulling operation, if the flexible tube is pulled out without inserting it to the appropriate position, the flexible tube will be completely As a result of pulling out from the joint, it is possible to easily confirm the joining by the pulling-out operation itself for joining.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing a plug-in type pipe joint and a flexible tube according to an embodiment of the present invention. The flexible tube 1 includes a corrugate tube 4 composed of thin stainless steel peaks 2 and valleys 3, and a synthetic resin tube-shaped covering 5 covering the outer periphery of the corrugate tube 4. The corrugate pipe 4 is connected to the plug-in pipe joint 10 in a state where the covering 5 has been removed from the tip of the corrugate pipe 4.

  The pipe joint 10 includes a joint body 12 and a push ring 14 whose tip is screwed into the inner diameter side of the joint body 12. The joint body 12 is a hollow short cylindrical tube formed in a stepped shape, is formed of a metal such as brass, and an external screw for connecting to a connected body such as a gas pipe at the outer periphery of one end thereof. A portion 16 and a hexagonal portion 18 for screwing the external screw portion 16 are provided. From the other end side of the joint body 12 to the inner peripheral portion thereof, an external packing housing portion 20, an internal thread portion 22, a ring gripping portion 24, a ring housing portion 26, and a support ring housing portion 28 are provided from the opening side. . A support ring 30 is disposed in a press-fitted state in the support ring accommodating portion 28 in the joint body 12. The support ring 30 is made of a metal such as brass, and prevents a ring 32 described later from entering the joint body 12.

  The press ring 14 is formed of a metal such as brass, and has an outer thread portion 34 and an outer packing groove portion 36 that can be screwed into the inner thread portion 22 in the joint body 12 at one end thereof. In addition, the inner periphery includes an inner periphery accommodating portion 44 that accommodates the retainer 38, the plate 40, and the seal packing 42, an inner circumferential arc surface 46 that can contact the retainer 38, and a fireproof packing accommodating groove 48. Further, on the outer periphery of the other end, a two-surface flat 50 with which a dedicated tool for screwing into the joint body 12 is provided, and a gas leak detection hole 52 is provided in the two-surface flat 50. In addition, a dust seal housing recess 54 is formed on the inner periphery of the push wheel 14 on the other end side. The two flat surfaces 50 have dimensions that a general tool cannot engage with, and have a structure that prevents the joint body 12 and the push ring 14 from being accidentally removed. A dust seal 56 made of a circular ring-shaped elastic body is mounted along the circumferential direction of the dust seal housing recess 54 on the inner peripheral surface of the push ring 14, and the inner protrusion 58 of the dust seal 56 extends around the outer periphery of the corrugate tube 4. It can be tightly sealed with the covering synthetic resin tube-like covering 5 to prevent entry from the outside.

  A fireproof packing 60 is mounted in the fireproof packing housing groove 48 on the inner peripheral surface of the push ring 14. The fireproof packing 60 is made of an elastic body formed by integrally molding, for example, expanded graphite and a rubber material such as NBR (nitrile rubber), and the volume of the fireproof packing 60 expands when exposed to a high temperature such as a fire. , Seal the inside.

  The gas leak detection hole 52 is a through hole for detecting gas leak due to corrugate tube damage. A plug 62 is disposed in the gas leak detection hole 52. When the plug 62 is pushed to a certain position, gas can be discharged and gas leak detection can be performed. After confirming that there is no gas leak, the plug 62 is pushed into the gas leak detection hole 52. It is designed to prevent intruders from outside.

  As shown in FIG. 1, in a state in which the presser wheel 14 is screwed into the joint main body 12, the retainer 38, the plate 40, and the seal packing 42 are moved from the presser wheel 14 toward the joint main body 12 into the inner peripheral housing portion 44 in the presser wheel 14. Arranged in order. Further, a ring 32 and a support ring 30 are arranged in the joint body 12 on the back side from the seal packing 42. The outer packing 100 is disposed in the outer packing groove 36 of the push ring 14 and the portion of the outer packing accommodating portion 20 in the joint body 12. The outer packing 100 is formed of the same material as the fireproof packing and is compressed by the push ring 14 and the joint main body 12 to prevent leakage from the inside and prevent entry of an intrusion from the outside.

  The retainer 38 is formed of a metal such as brass, and is formed on a radially inner end of the retainer 38 to be engaged with the corrugate trough 3 and is formed on the outer periphery of the other end of the retainer. An outer peripheral arc surface 382 that can come into contact with the inner peripheral arc surface 46 of the push ring 14, an axial notch 383 that is formed at a plurality of positions along the circumferential direction from one end side to the other end side, and the other end side And a thin-walled portion 384 for deformation, which has an inner diameter larger than the maximum diameter of the corrugate tube 4. When the outer circumferential arc surface 382 of the retainer 38 comes into contact with the inner circumferential arc surface 46 of the push ring 14 and a force is applied to press the protrusion 381 toward the opening side in the axial direction, the base R of the outer circumferential arc surface 382 is applied as shown in FIG. And the protrusion 381 side is rotationally deformed with the center of rotation as the center of rotation, and at this time, the tip portion is largely rotated so as to engage with the valley portion 3 of the corrugate tube 4.

  The plate 40 is formed of a metal such as a thin stainless plate, and prevents the seal packing 42 from being caught in the slit portion 383 when the retainer 38 is deformed.

  The seal packing (seal material) 42 is a sealing means for hermetically sealing the inside and outside of the pipe joint. In this embodiment, for example, NBR (nitrile rubber) containing a lubricant is used to reduce resistance when the corrugate pipe is inserted. In order to ensure stable sealing performance, the inner diameter of the seal packing 42 is smaller than that of the corrugate tube. Moreover, in this embodiment, since the seal packing 42 is formed of a material containing a lubricant, the corgate tube 4 can be inserted more smoothly.

  The ring 32 is formed of a metal such as thin spring steel, and is disposed in the ring housing portion 26 in the joint body 12. The ring 32 includes a first inner peripheral protrusion 321, a second inner peripheral protrusion 322, and an outer peripheral protrusion 323 that are integrally connected to the annular ring base 320, and the first inner peripheral protrusion 321. The second inner peripheral protrusion 322 engages with the peak 2 at the tip of the corrugate tube, and the outer peripheral protrusion 323 moves to a predetermined position and engages with the ring gripping part 24 in the joint body 12. The second inner peripheral protrusion 322 is formed with a protrusion 322 </ b> A whose tip is directed toward the radial center, and therefore, the peak 2 at the tip of the corrugate tube 4 passes through the second inner peripheral protrusion 322. I can't do that.

  Next, the effect | action of the plug-in type pipe joint of this embodiment is demonstrated. When joining the flexible tube 1 to the pipe joint 10, as shown in FIG. 2, the support ring 30, the ring 32, the seal packing 42, the plate 40, the retainer 38, the fireproof packing 60, and the dust seal 56 are mounted in the joint body 12. 1, the flexible tube 1 in a state in which the valley 3 of the corrugate tube 4 is cut and the covering 5 is removed from the top of the corgate tube 4 as shown in FIG. Insert from the part toward the joint body. At this time, the tip of the corrugate tube 4 passes through the inner periphery of the fireproof packing 60 and the retainer 38 in a non-contact state, while passing through the inner periphery of the seal packing 42 while being press-fitted. When the peak portion 2 at the tip of the corrugate tube 4 reaches the ring 32, it passes through the first inner peripheral protrusion 321 while elastically expanding and contracting while contacting the first inner peripheral protrusion 321. By passing through the first inner peripheral protrusion 321, the peak 2 at the tip of the corrugate tube 4 is gripped by the first inner peripheral protrusion 321 and the second inner peripheral protrusion 322 (see FIG. 1). Due to the protrusion 322 </ b> A at the tip of the second inner peripheral protrusion 322, the peak 2 at the tip of the corrugate tube 4 cannot pass through the second inner protrusion 322.

  Next, when the flexible tube 1 is pulled out in the pulling direction in order to join the corrugate tube 4 and the pipe joint completely, the ring 32 holding the peak 2 at the tip of the corgate tube 4 becomes the retainer 38, the plate 40, When the seal packing 42 is moved in the pulling direction and pulled out to a predetermined position, the outer peripheral projection 323 of the ring 32 expands in the circumferential direction and engages with the ring gripping portion 24 in the joint body 12. By engaging with the joint body 12, the ring 32 and the flexible tube 1 are prevented from moving in the insertion direction. As the ring 32 moves in the pulling direction, a force in the pulling direction acts on the retainer 38, and the inner circumferential arc surface 46 of the push wheel 14 and the outer circumferential arc surface 382 of the retainer 38 come into contact with each other, so that the thin wall portion With the base R of the outer peripheral arc surface 382 to be 384 as a fulcrum, the protrusion 381 side of the retainer 38 is rotationally deformed along the arc surface in the direction of large diameter reduction, and thereby the outer periphery of the valley portion 3 of the corgate pipe 4 and the retainer Thus, the 38 protrusions 381 are securely engaged. Since the engagement between the protrusion and the corrugate tube trough 3 is surely obtained by the large rotational deformation of the retainer protrusion 381, the distance between the peak portion 2 and the inner peripheral side of the retainer 38 when the corrugate tube 4 is inserted is sufficient. Since the flexible tube 1 can be easily inserted with a light effort, the retainer 38 may be manufactured with a certain degree of accuracy. In addition, the adhesion of the seal packing 42 to the inner peripheral side can be easily adjusted. The seal packing 42 positioned between the ring 32 and the retainer 38 is compressed by the ring 32 and the retainer 38 and expands in the inner diameter direction, thereby improving the sealing effect. As a result, as shown in FIG. 1, when the corrugate tube 4 is completely inserted to the depth of the joint body 12, the flexible tube 1 is then pulled in the pulling direction by the operator's hand to engage with the retainer 38. 7, the construction work is completed. In this way, the corrugate pipe is inserted from the end of the press ring toward the inside of the press ring, and after the end of the corrugate pipe is gripped by the ring disposed on the back side of the seal material, the ring and seal are pulled out in the pull-out direction. The material moves in the axial direction, and the retainer abutted against the inner peripheral circular arc surface of the pusher wheel by the end face of the sealing material rotates and deforms in the diameter reducing direction and engages with the corrugate tube. This can reliably prevent the flexible tube including the corrugate tube from coming out of the pipe joint. When the corrugate tube is inserted and pulled out with insufficient gripping by the ring, the entire corgate tube is pulled out without moving the sealing material. As a result, since the connection state can be confirmed almost simultaneously when the corrugate pipe is connected to the pipe joint, the connection work can be easily and efficiently performed in a short time. When removing the flexible tube 1 from the plug-in type pipe joint, using a tool such as a pipe wrench and removing the push ring 14 from the joint body 12, the plug-in type pipe joint can be disassembled. Can be removed from the plug-in fitting.

  The plug-in type pipe joint of the present invention described above is not limited to the above-described embodiment, and may be arbitrarily modified without departing from the essence of the present invention described in the claims. Good.

  The plug-in type pipe joint of the present invention can be widely applied as a pipe joint for piping of gas, other gases, liquids and the like.

It is a semi-cylindrical cross-section explanatory drawing which shows the state which inserted the flexible tube in the insertion type pipe joint which concerns on embodiment of this invention. FIG. 2 is a half cross sectional explanatory view of the plug-in type pipe joint of FIG. 1. It is an enlarged front view of the ring of the plug-in type pipe joint of FIG. It is an AA arrow directional view of FIG. It is an enlarged front view of the retainer of the plug-in type pipe joint of FIG. It is a BB line arrow directional view of FIG. FIG. 2 is a half cross sectional explanatory view showing a state in which the flexible tube and the pipe joint have been joined from the state of FIG. 1. FIG. 3 is an operation explanatory view showing an engagement relationship among a push ring, a retainer, and a corrugate pipe of the joint of FIG. 1. FIG. 3 is an operation explanatory view showing an engagement relationship among a push ring, a retainer, and a corrugate pipe of the joint of FIG. 1. It is a half-river cross-sectional explanatory drawing which shows the structure of the conventional pipe joint.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flexible tube 4 Corrugate pipe 10 Plug-in type pipe joint 12 Joint main body 14 Push ring 32 Ring 38 Retainer 40 Plate 42 Seal packing 46 Inner circular arc surface 321 First inner peripheral protrusion 322 Second inner peripheral protrusion 323 Outer peripheral protrusion 381 Radial inward protrusion 382 Outer circular arc surface 383 Notch 384 Thin wall portion R Support point

Claims (4)

In a plug-in type pipe joint for connecting a flexible tube formed of a corrugated pipe, a joint main body whose inner wall surface is formed in a stepped shape,
A push ring whose tip is screwed into the joint body;
A retainer disposed inside the press ring and having an inner diameter larger than the maximum diameter of the corrugate tube;
A sealing material disposed inside the pusher wheel behind the retainer;
The tip of the corrugate tube that is provided inside the joint body behind the seal material and abuts against the tip of the corgate tube when the corgate tube is inserted, and part of the corgate tube is elastically expanded and contracted in the radial direction of the corgate tube A ring for gripping,
The corrugate pipe can be inserted from the end of the press ring into the press ring, the retainer, and the inside of the joint body, and the end of the corgate pipe is configured to be press-fitted into the sealing material.
When inserting the corrugate tube from the end of the press ring toward the inside of the press ring, the ring and the seal material are pivoted by pulling in the pull-out direction after the tip of the corrugate tube is gripped by the ring arranged on the back side of the seal material. The retainer that has moved in the direction and contacted with the inner circular arc surface of the press ring by the seal material end surface rotates and deforms in the diameter-reducing direction and engages with the corrugate tube, while the seal material is moved when it is pulled out with insufficient gripping by the ring A plug-in type pipe joint characterized in that the entire corrugate pipe can be pulled out without being pulled. The retainer is formed on the inner periphery on one end side, and a radially inward protrusion for engaging with the corrugate trough,
An outer peripheral arc surface for contacting the inner peripheral arc surface of the press wheel formed on the outer peripheral portion on the other end side and performing rotational deformation in the diameter reducing direction;
An axial notch formed at a plurality of positions along the circumferential direction from one end side to the other end side;
The plug-in type pipe joint according to claim 1, comprising a thin-walled portion for deformation formed on the other end side. The ring has a ring base whose inner diameter is larger than the maximum diameter of the corrugate tube;
A first inner peripheral protrusion that protrudes in the inner diameter direction from the ring base and elastically expands and contracts in the radial direction of the corgate pipe when inserting the corgate pipe;
It protrudes in the inner diameter direction from the ring base and is arranged alternately with the first inner peripheral protrusion and at a different length and angle from the first inner peripheral protrusion, and restricts the entry of the corrugate tube at the tip. A second inner peripheral protrusion having a protrusion for preventing the corrugate tube from swinging;
The plug-in type pipe joint according to claim 1 or 2, further comprising an outer peripheral protrusion provided on an outer periphery of the ring base and elastically expanding in a circumferential direction to engage with the joint main body. The plug-type pipe joint according to any one of claims 1 to 3, wherein a plate is disposed between the retainer and the sealing material to prevent the sealing material from being caught in the retainer slit due to the rotational deformation of the retainer. .

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