JP2010007803A - Insertion guide for joint, automatic insertion guide feeding method, and one-touch joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an insertion guide for joint having a function to enable smooth joining of a joining pipe made of resin while high sealing performance is secured and to discriminate properly directionality in mounting without impairing the functionality and provide an automatic insertion guide feeding method and a one-touch joint for resin pipe. <P>SOLUTION: The insertion guide 1 in annular shape is fitted to the joint body 2 for guiding the insertion of a joining pipe 3 when joining the pipe 3. The insertion guide 1 is furnished protrusively with a projecting piece 11 for discriminating the directionality rigidly on either of the end faces. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an insertion guide for a joint that exhibits a function of guiding when connecting a resin pipe such as a cross-linked polyethylene pipe or a polybutene pipe, an insertion guide automatic supply method that automatically supplies the insertion guide in a predetermined direction, and an insertion It relates to a one-touch fitting with a guide.

  Resin pipes as described above are often used for piping for water supply and hot water supply in residential facilities. One-touch joints are widely used as joints for connecting resin pipes because they are easy to construct and shorten the construction time.

  As this type of one-touch joint, there are, for example, a one-touch joint for resin pipes of Patent Document 1 and an insertion-type pipe joint of Patent Documents 2 and 3. These one-touch joints have a guide ring inside. The guide ring guides the joining pipe, and by this guiding function, the seal member mounted in the one-touch joint is prevented from being damaged at the end face of the joining pipe, and the sealing performance after the pipe joining can be secured.

  Therefore, the guide ring is provided with a circular arc part for getting over the seal member on the front end side, and a flat part on which the joining pipe abuts on the rear end side. It is rotationally symmetric about the center. With this shape, the circular arc part and the seal member, the flat part and the end face of the joining pipe are in contact with the pressure equalized, and are inserted in this state. At that time, in order for the guide ring to reliably perform its function, it must be mounted in the proper mounting direction with respect to the one-touch joint. If the guide ring is mounted in a different mounting direction, If the joining pipe is not correctly inserted, the sealing performance after joining may not be ensured and leakage may occur.

  Then, when assembling this type of mechanical part, it is usually done manually or by using a parts feeder. In particular, the parts feeder can be supplied while automatically aligning the components in the proper orientation by a discriminating mechanism called an attachment, so by using this parts feeder, manual assembly or assembly equipment without checking the mounting direction of the components Can be incorporated. Therefore, when a parts feeder is used, the assembly work can be performed quickly and accurately, and work efficiency can be improved.

JP 2007-198585 A JP 2005-76853 A JP 2006-183732 A

  However, when trying to mount the guide ring in Patent Documents 1 to 3 in the joint, the guide ring has a rotationally symmetrical shape on the front end side and the rear end side. It is difficult to distinguish the front end side from the rear end side, and it is difficult to understand visually. Therefore, this guide ring has been difficult to install manually. Even if this guide ring is to be automatically supplied by the parts feeder, it is difficult to discriminate between the front end side and the rear end side, making automatic supply difficult.

  Further, this type of guide ring is generally molded by injection molding using a resin as a material, but the gate may remain in the molded product at the time of injection molding. If the gate remains in the molded product, the gate may come into contact with the inside of the joint to adversely affect the insertion load when the joined pipe is inserted, or the seal member may be damaged by contact with the seal member. Although it is possible to remove the gate using a nipper or the like, in this case, there is a problem that extra labor is increased and productivity is inferior.

  The present invention has been developed in order to solve the conventional problems, and an object of the present invention is to provide a joint insertion guide having a function of smoothly joining a resin joint pipe while ensuring high sealing performance. It is an object of the present invention to provide an insertion guide for a joint, an automatic insertion guide supply method, and a one-touch joint for a resin pipe that can properly determine the direction of mounting without impairing the functionality.

  In order to achieve the above object, the invention according to claim 1 is an annular insertion guide that is mounted in a joint and guides the insertion of the joint pipe when joining the joint pipe, and is directed toward one of the end faces. It is an insertion guide for joints in which protruding pieces for sex determination are integrally formed.

  In the invention according to claim 2, the protruding piece has an inner peripheral diameter larger than an outer diameter of the inner peripheral seal member mounted in the joint, and an outer peripheral side tip is formed on the outer peripheral side of the tip. It is the joint insertion guide formed on the extended line of the taper surface part.

  The invention according to claim 3 is the joint insertion guide in which the protruding piece is a pair of engaging pieces.

  The invention according to claim 4 is the joint insertion guide in which at least one of the protruding pieces is provided with a notch for resin injection molding.

  The invention according to claim 5 is for a joint pipe guide, and an insertion guide having a protruding piece on one end face side is inserted into the parts feeder, and the protruding piece is engaged with a component supply rail of the parts feeder. This is an automatic supply method of the insertion guide that automatically supplies the insertion guide.

  According to the sixth aspect of the present invention, the rail is vibrated, the protruding piece is engaged with the rail, the insertion guide is placed in an appropriate direction with respect to the rail, and is automatically supplied. This is an automatic supply method of an insertion guide in which the insertion guide is dropped from the rail when placed in an inappropriate direction.

  According to a seventh aspect of the present invention, there is provided an automatic insertion guide supply method in which the rail is inclined in a direction intersecting with the supply direction of the insertion guide so as to promote the removal of the insertion guide from the rail in an inappropriate direction.

  According to an eighth aspect of the present invention, a mounting groove is formed on the outer peripheral surface of the inner cylinder part provided integrally or separately in the joint, and an inner peripheral seal member is mounted in the mounting groove, and the inner cylinder part is elastic. A one-touch joint that contains an insertion guide that is formed of a material and guides the insertion of the joining pipe, and that has a protruding piece that can distinguish the mounting direction from the outside to the joint on the tip side. It is.

  The invention according to claim 9 is the one-touch joint in which the protruding piece has an inner diameter larger than the outer diameter of the inner circumferential seal member mounted in the joint.

  In the invention according to claim 10, the protruding piece has an inner peripheral diameter larger than an outer diameter of an inner peripheral seal member mounted in the joint, and an outer peripheral end portion is formed on the outer peripheral end side. It is a one-touch joint formed on an extension line of the tapered surface portion.

  The invention according to claim 1 is a joint insertion guide having a function of smoothly joining resin-made joint pipes while ensuring high sealing performance, and proper orientation during mounting without impairing the functionality. This is an insertion guide for joints that can be discriminated.

  According to the invention according to claim 2, when inserting the joining pipe in a state of being installed in the joint, the joining pipe can be joined while deforming the seal member installed in the joint without difficulty and ensuring the sealing performance. In addition, the joint insertion guide can be smoothly inserted without affecting the insertion load when the pipe is inserted.

  According to the third aspect of the present invention, the joint insertion guide is continuously supplied while the engaging piece is engaged with the rail when it is placed on the rail of the parts feeder and is aligned in an appropriate direction by the parts feeder.

  According to the invention of claim 4, the gate for injection molding does not adversely affect the load at the time of inserting the joining pipe or damage the seal member after being installed in the joint, and maintaining an excellent function. The joint insertion guide is excellent in productivity by suppressing the increase in the number of man-hours because it is possible to join the joined pipes and there is no need to perform post-processing after cutting after injection molding.

  According to the fifth aspect of the present invention, the insertion guide for the joint can be aligned and supplied continuously in an appropriate direction by the parts feeder, and the continuously supplied insertion guide can be accurately supplied manually or automatically. This is an automatic supply method of an insertion guide that can be mounted and a large number of joints can be manufactured in a short time.

  According to the invention of claim 6, the insertion guide in the proper direction can be transported to a predetermined position on the rail, and the insertion guide in the proper direction can be continuously supplied while preventing the insertion guide in the inappropriate state from being transported. This is an automatic supply method for insertion guides.

  According to the seventh aspect of the invention, it is an automatic insertion guide supply method that can increase the efficiency until the insertion guides are aligned in an appropriate direction, and can stably supply the insertion guides with higher accuracy.

  The invention according to claim 8 is a one-touch joint having a function of smoothly joining a resin-made joint pipe while ensuring high sealing performance, and can easily determine the orientation of the insertion guide and attach it. It is a one-touch joint that can fully demonstrate its functionality.

  According to the ninth aspect of the invention, the insertion guide does not damage the inner circumferential seal member when the joining pipe is inserted, and the inner circumference sealing member is deformed without difficulty by the insertion guide, and the joining pipe is joined while ensuring the sealing performance. One-touch coupling that can be.

  According to the invention of claim 10, in addition to the insertion guide not damaging the inner peripheral seal member when the joining pipe is inserted, when the outer peripheral seal member for the outer peripheral seal is provided, the outer peripheral seal member can be comfortably provided. The insertion guide can be inserted while ensuring high sealing performance without adversely affecting the insertion load, and the insertion guide is inserted while exhibiting a guide function with respect to the outer peripheral seal member by the protruding piece. This insertion guide is a one-touch joint that is smoothly inserted.

Hereinafter, an embodiment of an insertion guide for a joint according to the present invention will be described in detail with reference to the drawings.
In FIG. 1, an insertion guide body 1 is formed in an annular shape by an elastic material such as a resin such as polyethylene, and is mounted in a one-touch joint body (hereinafter, joint body) 2. The insertion guide body 1 has a function of guiding insertion of the joining pipe 3 when joining the joining pipe 3 to the joint body 2, and includes a taper surface 5, a taper surface portion 6, a step portion 7, a rear end surface 8, and a tip radius. It has a surface 9, a slit 10, and a protruding piece 11.

  A stepped portion 7 is provided between the tapered surface 5 and the tapered surface portion 6, and a holding claw 13 of the lock ring 12 can be temporarily attached to the stepped portion 7 as shown in FIG. 7 described later. . The taper surface 5 is formed so as to expand from the step portion 7 to the rear end surface 8 so as to be approximately the same diameter as an outer diameter (not shown) of the joint pipe 3, so that the end surface 3 a of the joint pipe 3 can come into contact with the rear end surface 8. Is provided. Further, the taper surface portion 6 is formed on the outer peripheral side of the tip from the step portion 7.

The tip round surface 9 is formed from the inner peripheral side to the outer peripheral side on the tip side of the tapered surface portion 6. The tip rounded surface 9 has an inner rounded surface 15 on the inner circumferential side and an outer rounded surface 16 on the outer circumferential side.
A plurality of slits 10 are provided alternately from the front end side and the rear end side of the insertion guide main body 1 with an appropriate length in the axial direction. In this embodiment, the slit 10 includes a slit 10a provided at every 90 degrees on the distal end side of the insertion guide main body 1 and a slit 10b provided at every 90 degrees on the rear end side. Are formed four each from the front end side and the rear end side of the insertion guide main body 1. Thereby, the insertion guide body 1 can be deformed in the axial direction.

  The protruding piece 11 is provided to determine the directionality of the insertion guide main body 1 and is integrally formed on one end face side of the insertion guide main body 1. In the present embodiment, the front end side of the insertion guide main body 1 is formed. Are integrally formed. As shown in FIGS. 8 and 9, the protruding piece 11 has an inner peripheral diameter D1 larger than an outer diameter D2 of an inner peripheral seal member (inner peripheral O-ring) 17 described later that is mounted in the joint body 2. The outer peripheral side tip portion 20 is formed on the extended line of the tapered surface portion 6. Moreover, this protrusion piece 11 is an engagement piece which can be engaged with the rail 22 of the parts feeder 21 mentioned later.

Further, the protruding piece 11 in the present embodiment is formed between the slit 10a and the slit 10a on the tip side. Therefore, when the insertion guide main body 1 is attached to the joint main body 2, the protruding piece 11 can be provided without preventing the insertion guide main body 1 from being uniformly expanded and contracted in the radial direction.
Furthermore, the protruding piece 11 is provided in an arc shape at two opposing positions in the circumferential direction on the distal end side of the insertion guide main body 1. Thereby, the intensity | strength of the protrusion piece 11 can be increased.

  Further, at least one of the protruding pieces 11 is provided with a notch 23 serving as a runway for resin injection molding. The length L in the axial direction of the notch 23 does not reach the position of the tip round surface 9 where the protruding piece 11 is not formed on the outer peripheral side, and reaches the inner round surface 15 on the inner peripheral side. Notched to a size that never happens.

Next, an embodiment of a parts feeder for automatically supplying an insertion guide and an automatic supply method alignment operation of the insertion guide will be described.
In FIG. 2, the parts feeder 21 has a rail 22 for supplying the insertion guide main body 1 as a part and a bowl 24, and when the insertion guide main body 1 is put into the parts feeder 21, the protruding piece 11 is railed. 22 is an apparatus that can be automatically supplied with the insertion guide main body 1 by being engaged with 22.

  The rail 22 is provided along an inner wall (not shown) of the bowl 24 and is continuously formed to the outside of the bowl 24. The rail 22 is provided with a gentle gradient (not shown) from the start point portion on the bowl 24 side to the external end point portion. Further, the rail 22 in the present embodiment has a substantially rectangular cross section as shown in FIG. 4, and the protruding piece 11 is engaged with both side portions thereof.

  An automatic or manual assembly machine (assembly machine) 25 is disposed on the end point side of the rail 22. The assembly machine 25 can be provided in an appropriate manner, and the insertion guide body 1 supplied by the parts feeder 21 can be mounted in the joint body 2 by using the assembly machine 25.

  The bowl 24 is formed in a container shape that can accommodate the insertion guide body 1, and the bowl 24 is provided with a vibrating portion (not shown). For example, the vibration part is configured by an electromagnet and a leaf spring, and can transmit vibration to the bowl 24 by amplifying the force of the electromagnet by the leaf spring.

  2 and 3, when the insertion guide main body 1 is accommodated in the bowl 24 and the vibration section is operated, the vibration is transmitted from the bowl 24 to the rail 22. At this time, vibration is transmitted also to the insertion guide body 1, and the insertion guide body 1 located near the rail is placed on the rail 22.

  At this time, as shown in FIG. 4, with the protruding piece 11 side (tip side) of the insertion guide body 1 facing downward, the insertion guide body is engaged with the protruding pieces 11 at both side portions of the rail. When 1 is placed in an appropriate direction with respect to the rail 22, the insertion guide body 1 is moved toward the end point portion by the vibration of the rail 22 toward the gradient direction of the rail 22, that is, in the direction of the arrow in FIG. Automatically supplied. At this time, as shown in FIG. 4A, the insertion guide body 1 is restricted from moving in the direction intersecting the supply direction by the engagement of the protruding piece 11 with the rail 22, and may fall off the rail 22. Is prevented.

  When the insertion guide body 1 reaches the end point of the rail 22, the insertion guide body 1 is mounted in the joint body 2 using the assembly machine 25. At this time, since the insertion guide body 1 is always supplied with the protruding piece 11 facing downward with respect to the rail 22, when the assembly machine 25 is automatic, the automatic assembly machine 25 uses the insertion guide body 25. 1 can be uniformly mounted in the joint body 2 with an appropriate directionality. In addition, when the assembly machine 25 is manual, the operator can efficiently mount it in the joint body 2 by a uniform operation without checking the direction of the insertion guide body 1. For this reason, it can also contribute to the reduction of work man-hours.

Here, even when the insertion guide main body 1 is to be manually attached, the projecting piece 11 for determining the directionality is formed so as to project to the distal end side. The front end side can be confirmed by touching the hand, and the front end side and the rear end side can be easily distinguished. Furthermore, by visually recognizing the protruding piece 11, the front end side and the rear end side can be easily distinguished from each other. Thus, the insertion guide body 1 can be easily mounted in the joint body 2 by hand.
As described above, the insertion guide of the present invention has the protruding piece 11 for direction determination formed on the distal end surface side. Therefore, the insertion guide can be easily determined by automatic supply or by manual operation and inserted into the joint body. Can be installed in the proper direction.

  On the other hand, when the insertion guide body 1 is placed on the rail 22 and vibration is applied, the protruding piece 11 does not engage the rail 22 or the rear end face 8 side of the insertion guide body 1 faces downward. When placed on the rail 22, the insertion guide body 1 is placed in an inappropriate direction with respect to the rail 22. If vibration is further applied to the rail 22 in this state, the insertion guide main body 1 falls off the rail 22. For this reason, the insertion guide main body 1 placed in an inappropriate state with respect to the rail 22 is not automatically supplied. Further, the dropped insertion guide main body 1 is again placed on the rail 22 by vibration. When the insertion guide main body 1 is placed on the rail 22 in an appropriate direction, the insertion guide body 1 is automatically supplied as described above. If it is placed on the rail 22, it is repeatedly dropped from the rail 22. In this way, only the insertion guide body 1 placed in the proper direction with respect to the rail 22 is automatically supplied.

  FIG. 6 shows an example in which the rail 22 is inclined in a direction intersecting the supply direction of the insertion guide body 1. In this example, the rail 22 is inclined in a direction perpendicular to the supply direction of the insertion guide body 1. ing. In this case, as shown in FIG. 6B, when the insertion guide body 1 is placed in an inappropriate direction with respect to the rail 22, the insertion guide body 1 easily slips in the inclined direction. Dropout is promoted. On the other hand, as shown in FIG. 6A, when the insertion guide main body 1 is set in an appropriate direction with respect to the rail 22, even if the insertion guide main body 1 is inclined due to the inclination of the rail 22, the protruding piece 11 is It is surely automatically supplied without being disengaged.

Subsequently, an embodiment of a one-touch joint equipped with the joint insertion guide of the present invention will be described.
As shown in FIG. 7, the joint body 2 in the present embodiment has a joint portion 30 and a covering portion 31, and a cylindrical indicator 32, an inner peripheral O-ring 17, and the inside of the joint portion 30 and the covering portion 31, An outer peripheral seal member (outer peripheral O-ring) 18 and a lock ring 12 are mounted.

  The cylindrical indicator 32 has a double cylinder structure having an inner cylinder part 35 and an outer cylinder part 36 integrally formed from the inner side of the inner cylinder part 35. With this structure, the inner cylinder part 35 and An insertion gap portion 37 into which the joining pipe 3 can be inserted is formed between the outer cylinder portion 36 and the outer cylinder portion 36. Moreover, the cylindrical indicator 32 is formed of transparent or translucent resin.

  The inner peripheral O-ring 17 is mounted in a mounting groove 38 formed on the outer peripheral side of the inner cylinder portion 35, and seals the inner peripheral surface side of the joint pipe 1 when the joint pipe 1 is inserted into the insertion gap portion 37. To do. On the other hand, the outer peripheral O-ring 18 is mounted in a mounting recess 39 formed on the inner peripheral side of the outer cylinder portion 36, and the outer peripheral surface side of the joint pipe 3 is inserted when the joint pipe 1 is inserted into the insertion gap portion 37. Seal.

  The lock ring 12 is formed in a substantially annular shape from stainless steel or the like and is mounted in the covering portion 31. The lock ring 12 has the holding claw 13 described above on the inner diameter side, and the holding claw 13 is bent at a predetermined inclination angle, and is engaged with the outer peripheral surface side of the joining pipe 3 so as to hold the joining pipe 3. It comes to prevent it from coming off.

  When the insertion guide body 1 is attached to the joint body 2, the insertion guide body 1 is attached to the outer peripheral side of the inner cylinder portion 35 from the opening side of the joint body 2. The holding claw 13 is locked to the stepped portion 7 and temporarily attached to a predetermined position in the joint body 2. For this reason, the insertion guide body 1 can be easily attached to the joint body 2 simply by confirming its insertion stroke even when using manual attachment or when a mounting jig (not shown) is used. Automation has also become easier.

  In the above embodiment, the tubular indicator 32 is provided separately inside the joint body 2, but the tubular indicator 32 may be integrated with the joint body 1. In this case, the inner cylinder part 35 and the outer cylinder part 36 are integrally formed on the joint body.

When joining the joining pipe 3 to the joint body 2, the joining pipe 3 is set as shown in FIG. 7, and the joining pipe 3 is inserted into the joint body 2 while the end face 3 a is in contact with the rear end face 8.
When the insertion guide body 1 reaches the inner peripheral O-ring 17 as shown in FIG. 8 by this insertion, the inner peripheral diameter D1 of the protruding piece 11 is larger than the outer diameter D2 of the inner peripheral O-ring 17 as described above. Since the projection diameter 11 is also large, the protruding piece 11 does not come into contact with the inner circumferential O-ring 17, and the inner rounded surface 15 comes into contact with the inner circumferential O-ring 17 as in the case where the protruding piece 11 is not provided. . For this reason, the maximum load when the joining pipe 3 is inserted is not affected.

  Further, as shown in FIG. 9, when the insertion guide main body 1 reaches the outer peripheral O-ring 18, the outer peripheral side distal end portion 20 of the protruding piece 11 is formed on the extension line of the tapered surface portion 6 as described above. The protruding piece 11 abuts on the outer peripheral O-ring 18 at the same angle as that of the tapered surface portion 6 to deform the outer peripheral O-ring 18 without difficulty. For this reason, it can prevent joining to the maximum load at the time of insertion of the joining pipe 3, and can be joined reasonably.

  At this time, a notch portion 23 is formed on the distal end side of the protruding piece 11 of the insertion guide body 1, and the length L of the notch portion 23 reaches the position of the distal end round surface 9 on the outer peripheral side. In addition, since it is formed in a size that does not reach the inner peripheral rounded surface 15 on the inner peripheral side, the cutout portion 23 comes into contact with the insertion guide main body 1 and the load when the joining pipe 3 is inserted. There is no risk of affecting or damaging the O-ring 17 and the O-ring 18 by contacting them.

Moreover, when the insertion guide body 1 is separated from the runner of a resin mold (not shown) at the position of the notch 23 during resin molding, the burr 26 forms the notch 23 as shown in FIG. The inner circumferential O-ring 17 and the outer circumferential O-ring 18 are not damaged by cutting the burr 26 shorter than the length L of the notch 23. That is, as described above, the inner peripheral diameter D1 is provided larger than the outer diameter D2, and the outer peripheral side tip portion 20 is provided with the cutout portion 23 with respect to the protruding piece 11 formed on the extension line of the tapered surface portion 6. When the insertion guide main body 1 gets over the inner peripheral O-ring 17, the notch 23 does not touch the inner peripheral O-ring 17. Since the portion has substantially the same shape as the tip rounded surface 9 where the protruding piece 11 is not formed, the notch 23 is not caught by the inner peripheral O-ring 17 and the outer peripheral O-ring 18. For this reason, the influence on an insertion load can be suppressed.
Further, since the burr 26 does not protrude from the notch 23 after cutting, the burr 41 is not formed on the tip side like the guide ring body 40 shown in the comparative example of FIG. Thus, there is no possibility of being caught in the inner peripheral O-ring 17 and the outer peripheral O-ring 18.

  Subsequently, when the joining pipe 3 is further inserted into the joint main body 2, the insertion guide main body 1 gets over the inner peripheral O-ring 17 and the outer peripheral O-ring 18, and eventually hits the inner portion 37 a of the insertion gap portion 37. At this time, since the protruding piece 11 has an arc shape as described above, the strength is increased and it is difficult to be deformed. Therefore, the position of the insertion guide main body 1 is reliably determined with respect to the inner portion 37a. Mounted in a state.

  When the connection of the joint pipe 3 is completed, the vicinity of the rear end portion of the joint pipe 3 can be accurately visually confirmed through the transparent or translucent cylindrical indicator 32 from the confirmation window 42 formed through the joint body 2. The joining pipe 3 can be reliably inserted to a predetermined insertion position.

It is the schematic which showed the insertion guide for couplings in this invention. (A) is a front view of an insertion guide. (B) is a front perspective view of an insertion guide. (C) is a rear perspective view of an insertion guide. It is the schematic plan view which showed the parts feeder. It is the flowchart which showed the automatic supply method of the insertion guide. It is the schematic which showed the state which the protrusion piece of the insertion guide engaged with the rail in the appropriate direction. It is the schematic which showed the state in which the insertion guide was mounted in the improper direction on the rail. It is the schematic which showed the state which the protrusion piece of the insertion guide engaged with the inclined rail in the appropriate direction. It is half-sectional view which showed the one-touch coupling. It is a partially expanded sectional view which shows the state which inserted the joining pipe in the one-touch coupling. It is a partially expanded sectional view which shows the state which inserted the joining pipe further in the one-touch coupling. It is sectional drawing which shows the state which inserted the guide ring which has a gate in the one-touch coupling.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insertion guide main body 2 Joint main body 3 Joining pipe 6 Tapered surface part 11 Protruding piece 17 Inner peripheral O-ring (inner peripheral seal member)
20 Outer peripheral side 21 Parts feeder 22 Rail 23 Notch 35 Inner cylinder 38 Mounting groove D1 Inner diameter D2 Outer diameter

Claims (10)

  An annular insertion guide that is mounted in the joint and guides the insertion of the joined pipe when joining the joined pipe, and is characterized in that a projecting piece for determining directionality is integrally projected on either one end face side. Insertion guide for fittings.   The projecting piece has an inner peripheral diameter larger than an outer diameter of an inner peripheral seal member mounted in the joint, and an outer peripheral end portion thereof is on an extension line of a tapered surface portion formed on the outer peripheral end portion. The joint insertion guide according to claim 1 formed.   The joint insertion guide according to claim 1, wherein the protruding pieces are a pair of engaging pieces.   The joint insertion guide according to any one of claims 1 to 3, wherein at least one of the protruding pieces is provided with a notch for resin injection molding.   Insertion guide having a protruding piece on one end face side into a parts feeder, and engaging the protruding piece with a component supply rail of the parts feeder to automatically insert the insertion guide. An automatic supply method of an insertion guide characterized by being supplied.   The rail is vibrated, the protruding piece is engaged with the rail, the insertion guide is placed in a proper direction with respect to the rail and automatically supplied, and the insertion guide is improper with respect to the rail. 6. The method of automatically supplying an insertion guide according to claim 5, wherein the insertion guide is dropped from the rail when placed in a direction.   The automatic supply method of the insertion guide according to claim 6, wherein the rail is inclined in a direction intersecting with the supply direction of the insertion guide to promote the drop-off of the insertion guide from the rail when the insertion guide is in an inappropriate direction.   A mounting groove is formed on the outer peripheral surface of the inner cylindrical portion provided integrally or separately in the joint, and an inner peripheral sealing member is mounted in the mounting groove, and the inner cylindrical portion is formed of an elastic material and is joined to the pipe. The one-touch coupling is characterized in that an insertion guide for guiding the insertion is accommodated, and a projection piece that can distinguish the mounting direction from the outside to the coupling is integrally projected on the distal end surface side.   The one-touch joint according to claim 8, wherein the projecting piece has an inner peripheral diameter larger than an outer diameter of an inner peripheral seal member mounted in the joint.   The projecting piece has an inner peripheral diameter larger than an outer diameter of an inner peripheral seal member mounted in the joint, and an outer peripheral end portion thereof is on an extension line of a tapered surface portion formed on the outer peripheral end portion. The one-touch coupling according to claim 8 formed.

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