JP2016014442A - Pipe coupling for resin pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe coupling for a resin pipe, capable of being easily attached to the resin pipe and maintaining a stably attached state for a long period of time.SOLUTION: A pipe coupling 1 according to the present invention comprises: a pipe coupling body 10 including a pipe-shaped portion 11; and a cylindrical sliding sleeve 5 capable of slidably, externally fitted onto a resin pipe 9. One end side of the pipe coupling body 10 is formed as a coupling pipe portion 2 and the other end side thereof is formed as an insert pipe portion 3. A displacement prevention portion such as a recessed portion is provided in an inner circumferential surface of the sliding sleeve 5. By disposing the sliding sleeve 5 in one end portion 91 of the resin pipe 9 in an externally fitted state while the insert pipe portion 3 is inserted into the end portion 91 of the resin pipe 9, the end portion 91 of the resin pipe 9 is pressurized and held between the sliding sleeve 5 and the insert pipe portion 3 while being compressed and part of the resin pipe 9 is closely engaged with the displacement prevention portion by an elastic restoring force.

Description

  The present invention relates to a pipe joint for a resin pipe attached to an end of a resin pipe made of a synthetic resin and related technology.

  2. Description of the Related Art In recent years, there has been provided a technique that uses a lightweight and flexible pipe (resin pipe) mainly made of a synthetic resin as a hot water pipe or a water supply pipe for supplying hot water from a water heater. Such resin pipes are fitted with metal pipe joints at their ends, and the resin pipes can be connected to other equipment, such as water heaters, bathtub hot-water adapters, and other pipes via the pipe joints. I try to connect them.

  Conventionally, there are various types of pipe joints for resin pipes. For example, many pipe joints have been proposed, such as those with a large number of parts, those with a small number of parts, those with a complicated structure, and those with a simple structure. (Patent Documents 1 to 3 etc.).

Patent No. 4047571 JP 2007-270875 A JP 2006-242338 A

  By the way, in the technical field of conventional pipe joints for resin pipes, it is preferable that attachment work can be easily performed when the pipe joint is attached to the resin pipe from the viewpoint of workability. On the other hand, no matter how easy it is to install the pipe joint, if a stable installation state cannot be maintained for a long time on the resin pipe, The position shifts to cause water leakage and the like, resulting in a problem that good water tightness cannot be secured.

  The present invention has been made in view of the above-described problems, and can be easily attached to a resin pipe and can maintain a stable attachment state for a long period of time with respect to the resin pipe, and its The purpose is to provide related technology.

  In order to solve the above problems, the present invention comprises the following means.

[1] A pipe joint for resin pipes attached to an end of a resin pipe made of synthetic resin,
A pipe joint body having a tubular portion;
A cylindrical sliding sleeve that can be slidably fitted to the resin tube,
One end side of the tubular part in the pipe joint body is formed as a connecting pipe part connectable to other equipment, and the other end side of the tubular part is formed as an insert pipe part insertable into one end part of the resin pipe,
On the inner peripheral surface of the sliding sleeve, a misregistration prevention portion configured by at least one of a concave portion and a convex portion is provided,
One end portion of the resin pipe is formed by disposing the sliding sleeve fitted on the resin pipe at one end portion of the resin pipe in a state where the insert pipe portion of the pipe joint body is inserted into one end portion of the resin pipe. For the resin tube, wherein the sliding sleeve and the insert tube portion are compressed and held and the resin tube is partly in close contact with the displacement prevention portion by an elastic restoring force. Pipe fittings.

  [2] The pipe joint for resin pipes according to [1], wherein the position shift prevention portion is formed along a circumferential direction.

  [3] The pipe joint for resin pipes according to [1] or [2], wherein the misalignment prevention unit is configured by a circumferential groove formed continuously along the circumferential direction.

  [4] The above-mentioned item 1 wherein a union nut is externally fitted to the connection pipe portion of the pipe joint body, and a union collar for preventing the union nut from being detached is provided on the outer periphery of one end of the connection pipe portion. The pipe joint for resin pipes of any one of -3.

[5] A fitting structure for a pipe joint for a resin pipe in which a pipe joint is attached to an end of a synthetic resin resin pipe,
The pipe joint for a resin pipe includes a pipe joint body having a tubular portion, and a cylindrical sliding sleeve that is slidably fitted onto the resin pipe,
One end side of the tubular part in the pipe joint body is formed as a connecting pipe part connectable to other devices, and the other end side of the tubular part is formed as an insert pipe part inserted into one end part of the resin pipe,
On the inner peripheral surface of the sliding sleeve, a misregistration prevention portion configured by at least one of a concave portion and a convex portion is provided,
By disposing the sliding sleeve at one end of the resin tube, one end of the resin tube is compressed and held while being compressed by the sliding sleeve and the insert tube, and a part of the resin tube is elastically restored. A fitting structure for a pipe joint for resin pipes, characterized in that it is brought into close contact with the misalignment prevention portion.

[6] A method for attaching a pipe joint for resin pipes, wherein the pipe joint for resin pipes according to any one of items 1 to 4 is attached to a resin pipe,
After the sliding sleeve is externally fitted to the resin tube and arranged on the other end side than the one end,
One end of the resin tube is expanded and deformed to widen the tube hole,
Then, after inserting the insert pipe part of the pipe joint body into one end part of the resin pipe,
A method of mounting a pipe joint for a resin pipe, wherein the sliding sleeve is slid from the other end side of the resin pipe and arranged at one end.

  According to the pipe joint for resin pipes of the invention [1], it is easy to simply insert the insert pipe part of the pipe joint body into one end part of the resin pipe and slide the sliding sleeve fitted around the resin pipe to one end part of the resin pipe. In addition, it can be attached to a resin tube. Furthermore, since a part of the resin tube is in close contact with the sliding sleeve misalignment prevention portion, it is possible to prevent the sliding sleeve and the pipe joint body from being misaligned with respect to the resin tube, and to maintain a stable mounting state for a long time with respect to the resin tube. be able to.

  According to the pipe joint for resin pipes of the inventions [2] and [3], the displacement prevention portion is disposed along a direction orthogonal to the sliding direction (position displacement direction) of the sliding sleeve. It is possible to more reliably prevent the displacement of the resin tube relative to the resin tube.

  According to the pipe joint for resin pipes of the invention [4], the connecting pipe portion can be easily and reliably connected to other equipment by screwing.

  According to the mounting structure of the pipe joint for resin pipe of the invention [5], the same effect can be obtained as described above.

  According to the method for attaching a pipe joint for resin pipes of the invention [6], the pipe joint for resin pipes can be securely attached to the resin pipe.

FIG. 1 is a cutaway side view of a lower half portion showing the periphery of one end of a resin pipe to which a pipe joint according to an embodiment of the present invention is attached. FIG. 2 is a lower half cutaway side view showing a pipe joint body in the pipe joint of the embodiment. 3A and 3B are diagrams showing a sliding sleeve in the pipe joint of the embodiment, in which FIG. 3A is a front view, and FIG. FIG. 4A is a cutaway side view of a lower half portion for illustrating a procedure for attaching the pipe joint of the embodiment. FIG. 4B is a lower half cutaway side view for explaining the fitting procedure of the pipe joint of the embodiment. FIG. 4C is a cutaway side view of the lower half portion for illustrating the procedure for attaching the pipe joint according to the embodiment. FIG. 5 is a cutaway side view of the lower half of the pipe joint mounting structure of the embodiment with the sliding sleeve removed. 6A and 6B are views showing a sliding sleeve of a pipe joint according to a modification of the present invention. FIG. 6A is a front sectional view, and FIG.

  FIG. 1 is a side view (lower half cutaway side view) showing the vicinity of one end of a resin pipe 9 to which a pipe joint 1 according to an embodiment of the present invention is attached, with its lower half cut away. In the present specification, in order to facilitate understanding of the invention, the left side is referred to as “one end side” and the right side is referred to as “the other end side” as viewed in FIG.

  As shown in the figure, the resin pipe 9 to which the pipe joint 1 of the present embodiment is attached has a synthetic resin having flexibility and elasticity as a main component. The resin pipe 9 is used as, for example, a hot water pipe or a water pipe connected to a hot water heater or the like.

  In the present invention, the resin pipe 9 is a pipe mainly composed of a synthetic resin, and the entire pipe does not necessarily need to be composed of a synthetic resin, and a part thereof may be composed of a material other than the synthetic resin. good. For example, the resin tube 9 of the present invention may be configured by a multilayer structure in which a light metal layer such as aluminum is interposed in a synthetic resin layer.

  In the present embodiment, the pipe joint 1 includes a pipe joint main body 10, a union nut 4 attached to the pipe joint main body 10, and a cylindrical sliding sleeve 5.

  In the present embodiment, these pipe joint components, that is, the pipe joint body 10, the union nut 4, and the sliding sleeve 5 are made of metal such as brass. Needless to say, in the present invention, the material of the pipe joint component is not particularly limited. For example, the pipe joint component may be made of a metal other than brass or a material other than metal such as synthetic resin. Furthermore, the pipe joint component does not necessarily need to be formed of a single material, and may be formed of, for example, a composite material of a metal and a synthetic resin.

  As shown in FIGS. 1 and 2, the pipe joint body 10 includes a straight tubular portion 11 and a flange portion 12 integrally formed on the outer periphery of the intermediate portion in the axial direction of the tubular portion 3. .

  A portion on one end side of the flange portion 12 in the tubular portion 11 is configured as the connecting tube portion 2, and a portion on the other end side of the flange portion 12 in the tubular portion 11 is the insert tube portion 3 referred to as a bamboo shoot. It is configured as. Needless to say, the inside of the connecting pipe portion 2 and the inside of the insert pipe portion 3 are connected in communication.

  The insert pipe portion 3 has an outer diameter dimension substantially equal to the inner diameter dimension of the pipe hole of the resin pipe 9 and can be press-fitted into the pipe hole of the resin pipe 9 by elastically expanding and deforming the resin pipe 9. It has become.

  On the outer peripheral surface of the insert tube portion 3, a plurality of protrusions 31 for preventing removal that are continuous along the circumferential direction are integrally formed at predetermined intervals along the axial direction.

  The connecting pipe part 2 is formed with a large diameter part 21 such that a tip part (one end part) thereof bulges in the outer diameter direction, and continues to the outer peripheral surface of the large diameter part 21 along the circumferential direction. A circumferential groove 22 is formed.

  As for the union nut 4 arrange | positioned at the connection pipe part 2, the internal thread 41 is engraved by the one end side of the internal peripheral surface. Further, an inner collar portion 43 that protrudes in a small amount in the inner diameter direction is formed at the inner peripheral edge portion of the opening on the other end side of the union nut 4, and the opening portion surrounded by the inner collar portion 43 is configured as a mounting hole. By inserting the connecting pipe portion 2 of the pipe joint body 10 into the mounting hole from the other end side in a loosely fitting state, the union nut 4 can freely rotate around the axis of the connecting pipe portion 2 of the pipe joint body 10. In addition, it is attached in a state of being slidably fitted in the axial direction.

  A retaining ring 23 is fixed in the circumferential groove 22 in the large diameter portion 21 of the connecting pipe portion 2 so that a part protrudes in the outer diameter direction. The inner diameter dimension of the other end side opening (mounting hole) in the union nut 4 is formed smaller than the outer diameter dimension of the retaining ring 23, and the inner collar portion 43 of the union nut 4 is engaged with the retaining ring 23. The union nut 4 is prevented from coming out from the connecting pipe portion 2 of the pipe joint body 1 to one end side and coming off.

  In addition, the inner diameter dimension of the other end side opening (attachment hole) in the union nut 4 is formed smaller than the outer diameter dimension of the flange portion 12 in the pipe joint body 1. For this reason, when the inner collar part 43 of the union nut 4 engages with the flange part 12, it is prevented that the union nut 4 moves to the other end side rather than the flange part 12. FIG.

  On the other hand, as shown in FIGS. 1 and 3, the sliding sleeve 5 is formed such that the inner diameter dimension at the intermediate portion in the axial center direction is slightly larger than the outer diameter dimension of the resin tube 9. Therefore, the sliding sleeve 5 can be externally fitted to the resin tube 9 by forcibly press-fitting the resin tube 9 into the cylindrical hole. Further, the sliding sleeve 5 can be forcibly slid along the resin tube 9 while being fitted on the resin tube 9.

  Furthermore, taper guide surfaces 51 and 51 are formed at both ends of the inner peripheral surface of the sliding sleeve 5 such that the inner diameter gradually increases as the both ends are directed outward.

  A circumferential groove 55 continuous along the circumferential direction is formed over the entire circumference at the center position in the axial direction on the inner circumferential surface of the sliding sleeve 5. In the present embodiment, the circumferential groove 55 functions as a misalignment prevention unit.

  Here, in this embodiment, the width dimension (groove width dimension) of the circumferential groove 55 is preferably set to 0.5 mm to 1 mm. That is, when the groove width dimension is too narrow or too thick, the effect of preventing displacement described in detail later cannot be obtained sufficiently, and the pipe joint 1 is kept stable with respect to the resin pipe 9 for a long time. There is a possibility that it cannot be attached, which is not preferable.

  Furthermore, the depth dimension of the circumferential groove 55 is preferably set to 0.5 mm or more. That is, when this groove depth dimension is too shallow, there is a possibility that the effect of preventing misalignment cannot be sufficiently obtained as described above.

  Next, the attachment procedure to the edge part (one end part) 91 of the resin pipe 9 in the pipe joint 1 of this embodiment is demonstrated.

  First, as shown in FIG. 4A, the sliding sleeve 5 is externally fitted from one end side of the resin tube 9, and the sliding sleeve 5 is further slid along the resin tube 9 so that the other end of the resin tube 9 is more than the other end 91. Place it on the side. Here, the one end portion 91 of the resin tube 9 is a portion corresponding to the insert tube portion 3 in a state where the insert tube portion 3 of the pipe joint body 10 is inserted into the resin tube 9 as described later.

  Next, as shown in FIG. 4B, a predetermined tool is inserted into one end portion 91 of the resin tube 9, and the one end portion 91 of the resin tube 9 is expanded and deformed so as to expand the tube hole.

  Next, as shown in FIG. 4C, the insert pipe portion 3 of the pipe joint main body 10 is press-fitted into the one end portion 91 of the resin pipe 9 that has been expanded and deformed.

  Thereafter, as shown in FIG. 1, the sliding sleeve 5 is forcibly slid from the other end side of the resin tube 9 to one end side, and the distal end surface (one end surface) of the sliding sleeve 5 is a flange portion of the pipe joint body 10. 12 is disposed at a position where it is in contact with and locked to 12, that is, a position on one end portion 91 of the resin tube 9. Thus, the sliding sleeve 5 is disposed at the one end 91 of the resin tube 9, whereby the one end 91 of the resin tube 9 is strongly pressed in the inner diameter direction to be compressed, and the one end 91 of the resin tube 9 is compressed in the compressed state. It is clamped by the insert pipe part 3 and the sliding sleeve 5 of the pipe joint main body 10. Thereby, the pipe joint main body 10 is held by the one end portion 91 of the resin pipe 9.

  Furthermore, in this embodiment, since the circumferential groove 55 is formed on the inner peripheral surface of the sliding sleeve 5, a portion (circumferential groove corresponding portion) 95 corresponding to the circumferential groove 55 in the one end portion 91 of the resin pipe 9 is provided. It bulges by the elastic restoring force, fits into the circumferential groove 55, and closely contacts the inner circumferential surface of the circumferential groove 55.

  The peripheral groove corresponding portion 95 of the resin tube 9 is compressed in the inner diameter direction together with the peripheral portion by the sliding sleeve 9 in the process of sliding the sliding sleeve 5, so that the sliding sleeve 5 is moved to the one end portion 91 of the resin tube 9. In the state immediately after being made, the circumferential groove corresponding portion 95 is not compressed and bulged in the same manner as the peripheral portion. However, as time elapses, the circumferential groove corresponding portion 95 gradually bulges due to the elastic restoring force, fits into the circumferential groove 55 and comes into close contact with the inner circumferential surface of the circumferential groove 55.

  For reference, FIG. 5 is a cutaway side view of the lower half of the resin pipe 9 in which the peripheral groove corresponding portion 95 is elastically restored and bulges after the pipe joint is mounted, with the sliding sleeve 5 removed. Show. As shown in the figure, the peripheral groove corresponding portion 95 of the resin tube 9 bulges compared to the peripheral portion, and this bulged portion actually fits into the peripheral groove 55 of the sliding sleeve 5 and is closely engaged. doing.

  In addition, when attaching the resin pipe 9 to which the pipe joint 1 of the present embodiment is attached to other equipment such as a hot water inlet adapter for a bathtub, the pipe joint 1 is connected to a union screw provided in the other equipment. . That is, the union screw is a tubular member having a screw engraved on the outer periphery, and the union nut is in a state where the end surface of the union screw is in contact with one end surface (the end surface) of the connecting pipe portion 2 in the pipe joint 1. 4 is rotated and screwed into the male screw of the union screw. Thereby, the pipe joint 1 is connected and fixed to another device (union screw) in a state where the union screw of the other device and the connecting pipe portion 2 are communicated with each other.

  As described above, according to the pipe joint 1 for a resin pipe of the present embodiment, the sliding sleeve 5 is externally fitted to the resin pipe 9, and the insert pipe portion 3 of the pipe joint body 10 is attached to the one end portion 91 of the resin pipe 9. After the insertion, the sliding sleeve 5 can be easily attached to the resin tube 9 by simply sliding the sliding sleeve 5 to the portion corresponding to the insert tube portion 3 (one end portion 91).

  Further, in the pipe joint 1 of the present embodiment, a circumferential groove 55 as a displacement prevention portion is formed on the inner circumferential surface of the sliding sleeve 5, and the circumferential groove corresponding portion 95 of the resin pipe 9 is elastically returned to return the circumferential groove 55. Since the circumferential groove 55 is engaged with the circumferential groove corresponding portion 95, the sliding sleeve 5 can be reliably prevented from sliding. For this reason, even if it is used for a long time, it is possible to prevent problems such as the sliding sleeve 5 being displaced or being detached from the one end portion 91 of the resin tube 9, water leakage or It is possible to prevent the pipe joint body 10 from being detached or the like. Therefore, even if the pipe joint 1 of this embodiment is used for a long period of time, it can maintain a stable mounting state with respect to the resin pipe 9 and can maintain good water tightness.

  In the present embodiment, since the tapered guide surfaces 51 and 51 are formed at both ends of the inner peripheral surface of the sliding sleeve 5, the sliding sleeve 5 is fitted on the resin tube 9 or slides on the resin tube 9. When the taper guide surfaces 51 and 51 are guided along the surface of the resin tube 9, the sliding sleeve 5 can be securely fitted and slid. For this reason, the end surface of the sliding sleeve 5 is caught on the surface of the resin tube 9, so that the sliding sleeve 5 cannot be externally fitted or slid, and the pipe joint 1 cannot be attached to the resin tube 9. Can be prevented.

  Further, in the present embodiment, the sliding sleeve 5 is formed in the same shape in which one half of the one end side (front side) is plane-symmetric with respect to the other half (rear side) half. That is, the sliding sleeve 5 of this embodiment has no directionality in the front-rear direction, and can be attached to the resin tube 9 in either direction. For this reason, it is possible to reliably prevent a problem that the sliding sleeve 5 is attached in the wrong direction, and the attaching operation can be performed more easily.

  Further, in the present embodiment, the circumferential groove 55 as the misregistration preventing portion formed in the sliding sleeve 5 is continuously provided along a direction (circumferential direction) orthogonal to the sliding direction (the misalignment direction) of the sliding sleeve 5. Formed. For this reason, inadvertent sliding movement of the sliding sleeve 5, that is, positional displacement can be prevented more reliably, and the pipe joint 1 can be attached to the resin pipe 9 in a more stable state.

  FIG. 6 is a view showing a sliding sleeve 5 in a pipe joint for resin pipes which is a modification of the present invention. As shown in the figure, the sliding sleeve 5 applied to the pipe joint of this modification has four through-holes 56 formed at equal intervals in the circumferential direction at the center position in the axial direction of the peripheral body portion, The hole 52 is configured as a misalignment prevention unit. In the sliding sleeve 5 of this modification, the circumferential groove 55 is not formed unlike the sliding sleeve 5 of the above embodiment.

  In the pipe joint of this modification, the other configuration is substantially the same as that of the pipe joint 1 of the above-described embodiment, and thus redundant description is omitted.

  In the pipe joint of this modification, when the sliding sleeve 5 is slid to the one end 91 of the resin pipe 9 after the pipe joint body 10 is inserted into the resin pipe 9, it corresponds to the through hole 56 in the resin pipe 9. The part (a part of the resin tube 9) bulges by the elastic restoring force, fits into the through hole 56, and is in close contact with the inner peripheral surface of the through hole 56.

  In the pipe joint of this modification, the same effect can be obtained as in the above embodiment.

  Further, in the sliding sleeve 5 of this modified example, since the misalignment preventing portion is formed by the through hole 56, the misalignment preventing portion can be easily formed simply by drilling the sliding sleeve 5. Can be easily performed.

  In the above-described embodiment and the like, the case where the sliding sleeve 5 is configured to be configured by the concave portion such as the circumferential groove 55 and the through hole 56 has been described as an example of the positional deviation prevention portion, but the present invention is not limited thereto. You may comprise a position shift prevention part by convex parts, such as a processus | protrusion and a streak-like process. For example, a plurality of protrusions are formed at predetermined intervals in the circumferential direction on the inner peripheral surface of the sliding sleeve, and the protrusions are configured as a misalignment prevention portion, or the inner peripheral surface of the sliding sleeve is distorted along the circumferential direction. What is necessary is just to form a line-like protrusion and to constitute the line-like protrusion as a position shift prevention part. Even when the misalignment prevention portion is formed by a convex portion in this way, a part of the resin tube 9 (a portion corresponding to the convex portion) bulges due to elastic restoring force and closely contacts the convex portion. Similarly, displacement of the sliding sleeve can be prevented, and a stable attachment state can be maintained for a long time with respect to the resin pipe.

  In the present invention, the sliding sleeve misalignment prevention portion may be constituted by both a convex portion and a concave portion.

  Further, in the present invention, the position and shape of the misregistration prevention portion are not limited. For example, the misregistration prevention portion may be formed at the end of the sliding sleeve or spirally. good.

  Furthermore, in the present invention, the number of position shift prevention portions is not limited, and may be one or two or more.

  Moreover, in the said embodiment, although the union nut 4 is attached to the connection pipe part 2 of the pipe joint main body 10, and the connection pipe part 2 is attached to another apparatus via the union nut 4, it is not restricted only to it. In the present invention, the connecting means for connecting the connecting pipe portion 2 to another device is not limited, and any connecting means may be adopted. For example, a male screw is engraved on the outer peripheral surface of the connecting pipe part, while a union nut is provided in the pipe connecting part on the other device side, and the union nut is fastened to the male screw of the connecting pipe part via the union nut. Thus, the connecting pipe part may be connected to another device. In short, any connection method may be employed as long as the connection pipe portion of the pipe joint can be connected to another device.

  Moreover, in the said embodiment, although the thing by which the flange part was provided in the intermediate part outer periphery of the tubular part is used as a pipe joint main body, it is not restricted only to it, In this invention, the pipe joint in which the flange part is not provided The main body can also be used.

  The pipe joint for resin pipes of this invention can be used as a connecting member when connecting the resin pipe to other equipment.

1: Pipe joint 10: Pipe joint main body 11: Tubular part 12: Flange part 2: Connecting pipe part 3: Insert pipe part 4: Union nut 5: Sliding sleeve 55: Circumferential groove (position shift prevention part)
56: Through hole (position shift prevention part)
9: Resin pipe 91: One end part 95: Part corresponding to circumferential groove (part of resin pipe)

Claims (6)

A pipe joint for a resin pipe attached to an end of a resin pipe made of synthetic resin,
A pipe joint body having a tubular portion;
A cylindrical sliding sleeve that can be slidably fitted to the resin tube,
One end side of the tubular part in the pipe joint body is formed as a connecting pipe part connectable to other equipment, and the other end side of the tubular part is formed as an insert pipe part insertable into one end part of the resin pipe,
On the inner peripheral surface of the sliding sleeve, a misregistration prevention portion configured by at least one of a concave portion and a convex portion is provided,
One end portion of the resin pipe is formed by disposing the sliding sleeve fitted on the resin pipe at one end portion of the resin pipe in a state where the insert pipe portion of the pipe joint body is inserted into one end portion of the resin pipe. For the resin tube, wherein the sliding sleeve and the insert tube portion are compressed and held and the resin tube is partly in close contact with the displacement prevention portion by an elastic restoring force. Pipe fittings.   The pipe joint for resin pipes according to claim 1 in which said position gap prevention part is formed along the peripheral direction.   The pipe joint for resin pipes according to claim 1 or 2 in which said position gap prevention part is constituted by the peripheral groove formed continuously along the peripheral direction.   A union nut is externally fitted on the connecting pipe portion of the pipe joint body, and a union collar for preventing the union nut from being detached is provided on an outer periphery of one end of the connecting pipe portion. The pipe joint for resin pipes of any one of these. It is a mounting structure of a pipe joint for a resin pipe, in which a pipe joint is attached to an end of a synthetic resin resin pipe,
The pipe joint for a resin pipe includes a pipe joint body having a tubular portion, and a cylindrical sliding sleeve that is slidably fitted onto the resin pipe,
One end side of the tubular part in the pipe joint body is formed as a connecting pipe part connectable to other devices, and the other end side of the tubular part is formed as an insert pipe part inserted into one end part of the resin pipe,
On the inner peripheral surface of the sliding sleeve, a misregistration prevention portion configured by at least one of a concave portion and a convex portion is provided,
By disposing the sliding sleeve at one end of the resin tube, one end of the resin tube is compressed and held while being compressed by the sliding sleeve and the insert tube, and a part of the resin tube is elastically restored. A fitting structure for a pipe joint for resin pipes, characterized in that it is brought into close contact with the misalignment prevention portion. It is the attachment method of the pipe joint for resin pipes which attached the pipe joint for resin pipes of any one of Claims 1-4 to the resin pipe,
After the sliding sleeve is externally fitted to the resin tube and arranged on the other end side than the one end,
One end of the resin tube is expanded and deformed to widen the tube hole,
Then, after inserting the insert pipe part of the pipe joint body into one end part of the resin pipe,
A method of mounting a pipe joint for a resin pipe, wherein the sliding sleeve is slid from the other end side of the resin pipe and arranged at one end.

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