JP2018115739A - Pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe joint in which a male member is hard to come off from a female member. SOLUTION: A pipe joint includes a retaining tool 18 that penetrates a retaining tool entry hole and fits into a retaining groove of the male member in order to prevent the male member from coming off the female member. The retaining tool 18 has a main body 90, a plurality of retaining claws 92, a first protruding portion 95, and a second protruding portion 96. The main body 90 is formed in an arc shape that surrounds a portion of the female member having a half circumference or more so as to be externally fitted to the female member, and is elastically deformable. Each of the plurality of retaining claws 92 is provided so as to project inward on the inner circumference of the main body 90, and can be engaged with the retaining groove of the male member in a state of penetrating the retaining tool entry hole. The first projecting portion 95 projects from one end of the main body 90 provided with the first retaining claw 92A among the plurality of retaining claws 92 along the arc shape of the main body 90. The second protruding portion 96 projects from the other end in the circumferential direction of the main body 90 provided with the second retaining claw 92B among the plurality of retaining claws 92 along the arc shape of the main body 90. [Selection diagram] Fig. 5

Description

  The present invention relates to a pipe joint.

  Patent document 1 discloses a pipe joint. The pipe joint disclosed in Patent Document 1 includes a female member, a male member, a seal ring, and a stopper ring (a stopper). The female member has a receiving portion at least at one end. The male member has an insertion side tip. The distal end portion on the insertion side is inserted into the receiving portion of the female member. The seal ring is located between the overlapping surfaces of the receiving portion and the insertion-side tip portion. The stopper ring is attached to the outer periphery of the receiving portion. A retaining groove is provided in the circumferential direction on the outer periphery of the insertion side tip of the male member. The stopper ring is formed in a shape having a ring body and a plurality of retaining claws. The ring body is formed in a C shape having open ends. The ring body is elastic and can be expanded and contracted. Each retaining claw is integrally protruded inwardly on the inner periphery of the ring body. Of the plurality of retaining claws, two retaining claws are provided at both open ends of the ring body. Each of the two retaining claws is formed so as to be flush with the end surface of the open end portion of the ring body in the circumferential direction of the ring body. In the female mold member, a stopper ring receiving groove is provided on the outer periphery of the receiving portion. The stopper ring receiving groove corresponds to the outer periphery of the retaining groove. A stopper ring is fitted into the stopper ring receiving groove. In the female mold member, a stopper entry hole is provided at the groove bottom of the stopper ring receiving groove. The stopper entry hole penetrates the stopper claw of the stopper ring. Thereby, the retaining claw protrudes inward of the receiving part. The retaining claw protruding from the claw insertion hole is engaged with the retaining groove at its tip.

JP 2007-292281 A

  In the pipe joint disclosed in Patent Document 1, when the male member is prevented from coming off from the female member using a stopper ring, the female part and the male member are A pulling force may be applied to at least one of the male members in a direction in which the male members are removed from the female members. In this case, a force is applied to the stopper ring to expand it radially outward. Therefore, in the stopper ring, the width between the open both ends of the ring main body is expanded with respect to the mounting portion in the receiving portion. Further, in the stopper ring, since two retaining claws are provided at the open end of the ring body, the strength in the vicinity of the two retaining claws was relatively weak. Therefore, when the stopper ring is expanded, the two retaining claws are easily deformed by contact with the receiving portion or the like. Therefore, there is a possibility that the two retaining claws may come out of the retaining groove, that is, the engagement of the two retaining claws with the retaining groove may be released. As a result, there was a concern that the stopper ring was detached, and thereby the male member was detached from the female member. In particular, since the C-shaped ring main body only surrounds a part of the mounting portion of the receiving portion, when the two retaining claws are deformed, the engagement of the two retaining claws with respect to the retaining groove is released. The possibility of the stopper ring coming off was high. The present invention solves such problems. An object of the present invention is to provide a pipe joint that prevents a male member from coming out of a female member in a pipe joint that prevents the male member from coming out of the female member using a stopper.

  The pipe joint of the present invention will be described with reference to the drawings. The reason why the reference numerals in the figure are used in this column is to help understand the contents of the invention. The use of the symbols in the figure in this column is not intended to limit the scope of the invention to the scope shown.

  In order to achieve the above-described object, according to one aspect of the present invention, the pipe joint includes a cylindrical female member 10, a cylindrical male member 12, and a retaining member 18. The female mold member 10 has a cylindrical receiving portion 20 and a stopper entry hole 80 provided on the outer periphery of the receiving portion 20. The male member 12 has a cylindrical insertion side end 30 inserted into the receiving portion 20 and a retaining groove 54 provided on the outer periphery of the insertion side end 30. The retaining member 18 is annular, and the retaining member entry hole 80 is used to prevent the insertion side end 30 of the male member 12 inserted into the receiving portion 20 of the female member 10 from coming off. And can fit into the retaining groove 54. The stopper 18 includes a main body 90, a plurality of stopper claws 92, a first protrusion 95, and a second protrusion 96. The main body 90 is formed in an arc shape that surrounds a portion of the female member 10 that is more than half a circumference so that it can be externally fitted to the female member 10, and is elastically deformable. Each of the plurality of retaining claws 92 is provided so as to protrude inwardly on the inner periphery of the main body 90, and is configured to be able to engage with the retaining groove 54 of the male member 12 while penetrating the retaining tool entry hole 80. Has been. The first projecting portion 95 projects along the arc shape of the main body 90 from one circumferential end of the main body 90 provided with the first retaining claws 92 </ b> A of the plurality of retaining claws 92. The second projecting portion 96 projects along the arc shape of the main body 90 from the other circumferential end of the main body 90 provided with the second retaining claws 92 </ b> B of the plurality of retaining claws 92.

  According to this configuration, when the retaining member 18 is attached to the female member 10, the retaining pawl 92 that penetrates the retaining member entry hole 80 engages with the retaining groove 54 of the male member 12. At this time, the stopper 18 is externally fitted so as to embrace the female member 10 using the main body 90, the first projecting portion 95, and the second projecting portion 96. When the stopper 18 is mounted on the female member 10 in this way, the male member 12 is separated from the female member 10 with respect to at least one of the female member 10 and the male member 12 due to the generation of internal pressure of the pipe joint. When a pulling force is applied in the direction of withdrawal, a force is applied to the retaining member 18 to expand it to the radially outer side of the female member 10. As a result, the space between the first retaining claw 92A and the second retaining claw 92B in the retaining member 18 and the opening 93 between the first projecting portion 95 and the second projecting portion 96 are expanded. The portion 93 can be kept narrow with respect to the mounting portion of the retaining member 18 in the female member 10. Therefore, it is difficult for the stopper 18 to come off the female member 10.

  In addition, in the retaining member 18, the first projecting portion 95 supports the first retaining pawl 92 </ b> A together with the main body 90. The 2nd protrusion part 96 will support the 2nd prevention nail | claw 92B with the main body 90. FIG. Therefore, the strength in the vicinity of the first retaining claw 92A and the vicinity of the second retaining claw 92B can be improved. Therefore, even when the retainer 18 is deformed so as to expand due to the pulling force described above, the deformation of the first retaining pawl 92A and the second retaining pawl 92B due to contact with the female mold member 10 or the like is prevented. Can be suppressed. Therefore, the engagement of the first retaining claws 92A and the second retaining claws 92B with respect to the retaining grooves 54 is easily maintained. As a result, when the female member 10 and the male member 12 are connected, it is difficult for the male member 12 to come out of the female member 10.

  The first retaining claw 92A has a first tip portion 98A and a first protrusion 99A projecting from the first tip portion 98A toward the second retaining claw 92B, and is engaged with the retaining groove 54. For this purpose, the first tip 98A and the first protrusion 99A are fitted into the retaining groove 54, and the second retaining pawl 92B moves from the second distal end 98B toward the first retaining pawl 92A. It is desirable to have a protruding second protrusion 99B and to fit the second tip end portion 98B and the second protrusion 99B into the retaining groove 54 for engagement with the retaining groove 54.

  According to this configuration, when the first retaining pawl 92A and the second retaining pawl 92B are engaged with the retaining groove 54, the area engaged with the retaining groove 54 is increased by the amount of the first protrusion 99A and the second protrusion 99B. Therefore, it becomes difficult for both the first retaining claws 92 </ b> A and the second retaining claws 92 </ b> B to come out of the retaining tool entry hole 80 of the receiving portion 20. Therefore, the engagement of the first retaining claws 92A and the second retaining claws 92B with respect to the retaining grooves 54 is more easily maintained. Therefore, when the female member 10 and the male member 12 are connected, the male member 12 becomes more difficult to be removed from the female member 10.

  Further, the pipe joint is provided with a covering material 100 attached to the female member 10 while covering the stopper 18 so that the plurality of retaining claws 92 are engaged with the retaining grooves 54 of the male member 12. It is desirable to provide.

  According to this configuration, it is difficult for the stopper 18 to come off the female member 10. Accordingly, the male member 12 connected to the female member 10 is more difficult to come off.

  According to the present invention, it is possible to provide a pipe joint that makes it difficult for a male member to come out of a female member.

It is a figure of the pipe joint concerning one embodiment of the present invention. It is a figure of the female type member concerning one embodiment of the present invention. It is AA sectional drawing of FIG. It is a figure of the male type member concerning one embodiment of the present invention. It is a figure of the stopper ring concerning one Embodiment of this invention. It is BB sectional drawing of FIG. It is a figure of the coating | covering material concerning one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

[Description of structure]
FIG. 1 is a view of a pipe joint according to the present embodiment. In FIG. 1, a part of the pipe joint is cut away. Based on FIG. 1, the structure of the pipe joint of this embodiment is demonstrated. The pipe joint includes a cylindrical female member 10, a cylindrical male member 12, a rubber penetration seal 14, a rubber gap seal 16, a stopper ring (an example of a retaining member) 18, and a coating Material 100. A synthetic resin tube 900 is connected to the female member 10. Part of the male member 12 is inserted into the female member 10. A synthetic resin tube 902 is connected to the male member 12. The through seal 14 seals between the female member 10 and the male member 12. The gap seal 16 also seals between the female member 10 and the male member 12. The stopper ring 18 prevents the male member 12 from coming out of the female member 10. The covering material 100 is disposed on the outer periphery of the female member 10 and the stopper ring 18 mounted on the female member 10. The covering material 100 maintains the state in which the stopper ring 18 is mounted on the female member 10.

  FIG. 2 is a view of the female member 10 according to the present embodiment. In FIG. 2, a part of the female member 10 is cut away. FIG. 3 is a cross-sectional view taken along the line AA of FIG. Based on FIG. 1 thru | or FIG. 3, the structure of the female-type member 10 of this embodiment is demonstrated. In the present embodiment, the female member 10 is made of synthetic resin. In the case of this embodiment, each part which comprises the female-type member 10 is shape | molded by injection molding. In the case of the present embodiment, the female member 10 includes a cylindrical receiving portion 20, a synthetic resin pipe connecting portion 22, a stopper ring receiving concave groove 24, and two slide grooves 126. The receiving portion 20 is disposed at one end of the female member 10. The synthetic resin pipe connecting portion 22 is disposed at the other end of the female member 10. In the case of this embodiment, the receiving part 20 is formed in the cylindrical shape. One end of the synthetic resin pipe 900 is inserted into the synthetic resin pipe connecting portion 22. The synthetic resin tube 900 is fixed to the female mold member 10 by heat sealing. The stopper ring housing concave groove 24 is provided on the outer periphery of the receiving portion 20 along the circumferential direction. The stopper ring 18 is fitted into the stopper ring receiving groove 24. A claw insertion hole (an example of a retaining tool entry hole) 80 is provided in the groove bottom (the outer periphery of the receiving portion 20) extending in the circumferential direction in the stopper ring receiving groove 24. A plurality of claw insertion holes 80 are provided in the circumferential direction at the groove bottom of the stopper ring housing groove 24. The inner side and the outer side of the female member 10 communicate with each other through the claw insertion hole 80. The slide groove 126 is provided on the outer periphery of the female member 10. A part of the covering material 100 is fitted in the slide groove 126. The covering material 100 is positioned by fitting a part of the covering material 100 into the slide grooves 126.

  The receiving part 20 has an annular entrance 40 and an annular seal housing part 42. The inner side and the outer side of the female mold member 10 communicate with each other through the entrance 40. The male member 12 enters from the entrance 40. The seal accommodating portion 42 is disposed inside the female member 10. The seal accommodating portion 42 is disposed at the back of the entrance 40. The seal housing portion 42 accommodates the through seal 14 and the gap seal 16.

  The seal housing portion 42 includes a through seal housing portion 46 and an annular gap seal contact portion 48. The penetration seal 14 is accommodated in the penetration seal accommodation portion 46. The clearance seal contact portion 48 is disposed at the back of the through seal housing portion 46 as viewed from the entrance 40. The gap seal contact portion 48 faces the entrance 40.

  The penetrating seal housing portion 46 includes an outer ring contact portion 66 and an annular support wall surface 68. The outer ring contact portion 66 surrounds the through seal 14. The outer ring contact portion 66 contacts the penetrating seal 14. The support wall surface 68 faces the entrance 40. The support wall surface 68 prevents the penetrating seal 14 from being pushed and moved to the back of the receiving portion 20 by the male member 12.

  FIG. 4 is a view of the male member 12 according to the present embodiment. In FIG. 4, a part of the male member 12 is cut away. Based on FIG. 1 and FIG. 4, the structure of the male member 12 of this embodiment is demonstrated. The male member 12 has a cylindrical insertion side end 30, a flange 32, and a synthetic resin pipe connection side end 34. The insertion side end 30 is disposed at one end of the male member 12. In the case of this embodiment, the insertion side end 30 is formed in a cylindrical shape. The insertion side end 30 is inserted into the receiving port 20 of the female member 10. The insertion side end 30 enters the receiving port 20 from the entrance 40. The collar portion 32 is disposed on the outer periphery of the insertion side end portion 30. The flange portion 32 prevents the insertion side end portion 30 from entering the receiving portion 20 too much. The synthetic resin pipe connection side end 34 is disposed at the other end of the male member 12. One end of the synthetic resin tube 902 is inserted into the synthetic resin tube connection side end 34. The synthetic resin tube 902 is fixed to the male member 12 by heat fusion.

  The insertion side end 30 includes a through seal contact portion 50, an annular tip side seal surface 52, and a retaining groove 54. The through seal contact portion 50 contacts the through seal 14. The distal end side seal surface 52 is disposed on the distal end side of the insertion side end 30 as viewed from the through seal contact portion 50. The front end-side seal surface 52 faces the gap seal contact portion 48 in the receiving portion 20. The front seal surface 52 sandwiches the gap seal 16 together with the gap seal contact portion 48. The retaining groove 54 is provided along the circumferential direction so as to surround the outer periphery of the insertion side end 30. The retaining groove 54 is disposed at a position facing the claw insertion hole 80 when the insertion side end 30 is abutted against the gap seal 16.

  The through seal contact portion 50 has an annular facing surface 76 and a cylindrical inner ring contact portion 78. The facing surface 76 faces the support wall surface 68 when the insertion side end 30 is inserted into the receiving port 20. The inner ring contact portion 78 is disposed between the front end side seal surface 52 and the facing surface 76.

  FIG. 5 is a diagram of the stopper ring 18 according to the present embodiment. 6 is a cross-sectional view taken along the line BB in FIG. Based on FIG.1, FIG5 and FIG.6, the structure of the stopper ring 18 of this embodiment is demonstrated. The stopper ring 18 is mounted in the stopper ring receiving concave groove 24. In the case of this embodiment, the stopper ring 18 is made of synthetic resin. In the case of the present embodiment, the stopper ring 18 has an annular shape with a part of the circumferential direction cut out. The stopper ring 18 includes a ring main body 90, a plurality (three in this embodiment) of retaining claws 92, a first protrusion 95, and a second protrusion 96. The ring body 90 is formed in an arc shape. This arc shape is an arc shape whose arc length is longer than that of the semicircular arc. The ring main body 90 is elastically deformable. The retaining pawl 92 protrudes inwardly on the inner periphery of the ring main body 90. The retaining pawl 92 is integrated with the ring main body 90. Each retaining claw 92 penetrates the claw insertion hole 80 of the receiving portion 20 when the stopper ring 18 is attached to the outer periphery of the female member 10. Thereby, each retaining claw 92 protrudes into the receiving portion 20. When the insertion side end 30 of the male member 12 is inserted into the female member 10, the retaining claws 92 are engaged with the retaining grooves 54 of the male member 12. The first protrusion 95 and the second protrusion 96 are provided continuously with respect to the ring main body 90.

  The stopper ring 18 is elastic so that the normal width w of the opening 93 formed between the first projecting portion 95 and the second projecting portion 96 expands in the radial direction, and returns to the original state after expanding. It can be deformed. The normal width w of the opening 93 is smaller than the diameter of the ring body 90. In the stopper ring 18, the ring main body 90 has an arc shape that surrounds a portion where the female member 10 is attached, that is, a portion of the groove bottom of the stopper ring housing concave groove 24 that is more than half a circumference. The ring main body 90 is freely deformable in diameter. Thereby, the ring main body 90 can be externally fitted to the female member 10 (receiving part 20). At the time of external fitting, the ring main body 90 is disposed inside the stopper ring receiving concave groove 24. In the case of this embodiment, the ring main body 90 is composed of a plate-like member bent into a C shape. The ring main body 90 is formed in a shape along the groove bottom of the stopper ring housing concave groove 24. Note that the normal width w of the opening 93 can be arbitrarily set, and may be, for example, substantially zero.

  The plurality of retaining claws 92 include a first retaining pawl 92A and a second retaining pawl 92B. The first retaining pawl 92 </ b> A is provided at one end in the circumferential direction of the ring main body 90. The second retaining claw 92 </ b> B is provided at the other circumferential end of the ring main body 90. The first retaining claws 92 </ b> A and the second retaining claws 92 </ b> B are each formed to taper from the ring body 90 toward the inward direction. Specifically, the first retaining pawl 92A includes a first base portion 97A that is continuous with the ring body 90, and a first tip portion 98A that has a circumferential length of the ring body 90 that is smaller than the first base portion 97A. The first tip portion 98A is fitted into the retaining groove 54 in order to engage the first retaining pawl 92A with the retaining groove 54. The first tip 98A is provided with a first protrusion 99A. The first protrusion 99A protrudes from the first tip portion 98A toward the second retaining claw 92B. The first protrusion 99A fits in the retaining groove 54 together with the first tip portion 98A. The second retaining pawl 92B includes a second base portion 97B that is continuous with the ring main body 90, and a second tip end portion 98B that has a smaller circumferential length of the ring main body 90 than the second base portion 97B. The second tip end portion 98B fits in the retaining groove 54 in order to engage the second retaining pawl 92B with the retaining groove 54. A second protrusion 99B is provided on the second tip portion 98B. The second protrusion 99B protrudes from the second tip portion 98B toward the first retaining claw 92A. The second protrusion 99B fits in the retaining groove 54 together with the second tip portion 98B.

  The first protrusion 95 protrudes along the arc shape of the ring body 90 from one circumferential end of the ring body 90 provided with the first retaining claws 92A. The 2nd protrusion part 96 protrudes along the arc shape of the ring main body 90 from the circumferential direction other end of the ring main body 90 in which the 2nd retaining claw 92B was provided. In other words, the first protrusion 95 is on the extension line of the ring body 90 on one end side in the circumferential direction of the ring body 90. The second protrusion 96 is on the extension line of the ring body 90 at the other circumferential end of the ring body 90. In the case of this embodiment, the 1st protrusion part 95 and the 2nd protrusion part 96 are formed in the arc shape according to the ring main body 90, respectively. In the case of this embodiment, the 1st protrusion part 95 and the 2nd protrusion part 96 are each united with the ring main body 90, respectively. The first protrusion 95 and the second protrusion 96 are for reducing the normal width w of the opening 93 of the stopper ring 18 compared to the width of the space between the first retaining claw 92A and the second retaining claw 92B. , Close to the other protrusion 96 (95). The first projecting portion 95 and the second projecting portion 96 are disposed on the outer periphery of the receiving portion 20 when the ring main body 90 is externally fitted to the female member 10. At this time, the first projecting portion 95 and the second projecting portion 96 are disposed inside the stopper ring housing concave groove 24, similarly to the ring main body 90.

  FIG. 7 is a diagram of the covering material 100 according to the present embodiment. In FIG. 7, a part of the covering material 100 is cut away. Based on FIG. 1 and FIG. 7, the structure of the coating | covering material 100 of this embodiment is demonstrated. The covering material 100 is attached to the female member 10 while covering the stopper ring 18. The covering material 100 includes a reinforcing ring 102 and a cover 104. In the case of this embodiment, the reinforcing ring 102 is an annular member made of brass or the like (may be another material such as a synthetic resin). The reinforcing ring 102 is attached to the outer periphery of the stopper ring 18 when the male member 12 is connected to the female member 10 and the stopper ring 18 is attached. The cover 104 is movable along the outer peripheral surface of the female member 10. The cover 104 protects the stopper ring 18 and the reinforcing ring 102.

  The cover 104 has an annular cover part 130 and an engaging part 132. In the case of this embodiment, the annular cover part 130 and the engaging part 132 are integrated. The annular cover part 130 is annular. The annular cover portion 130 covers the stopper ring 18 and the reinforcing ring 102. The engaging part 132 protrudes from one end of the annular cover part 130. The engaging part 132 fits into the slide groove 126 of the female member 10. It is the tip portion of the engaging portion 132 that fits into the slide groove 126. The engaging portion 132 prevents the annular cover portion 130 from sliding as a result of accidental force.

[Description of usage]
The pipe joint concerning this embodiment may be used as a part of water supply piping. The female member 10 contains a through seal 14 and a gap seal 16 in advance.

  A person who intends to connect the synthetic resin tube 900 and the synthetic resin tube 902 (hereinafter, referred to as “connector”) with the tube joint according to the present embodiment first connects the synthetic resin tube 900 to the female member 10. To do. Next, the connection person connects the synthetic resin tube 902 to the male member 12. The specific procedure for these connections is the same as the connection between a known joint and a known synthetic resin pipe. Therefore, the specific procedure is not described here.

  When the synthetic resin tube 900 is connected to the female member 10 and the synthetic resin tube 902 is connected to the male member 12, the connecting person inserts the male member 12 into the receiving portion 20 of the female member 10. The side end 30 is inserted. When the insertion side end portion 30 is inserted into the receiving portion 20, the inner ring portion 62 of the penetrating seal 14 contacts the inner ring contact portion 78 of the male member 12. As a result, the through seal 14 is sandwiched between the outer ring contact portion 66 of the female member 10 and the inner ring contact portion 78 of the male member 12. At the same time, the front seal surface 52 of the male member 12 presses the gap seal 16 against the gap seal contact portion 48 of the female member 10. As a result, the gap seal 16 is sandwiched between the gap seal contact portion 48 and the tip-side seal surface 52.

  When the penetrating seal 14 is sandwiched between the outer ring contact portion 66 and the inner ring contact portion 78 and the gap seal 16 is sandwiched between the gap seal contact portion 48 and the front end side seal surface 52, the retaining groove of the male member 12 is retained. 54 communicates with the outside of the female member 10 through the claw insertion hole 80. The connecting person attaches the stopper ring 18 to the stopper ring receiving groove 24. That is, the connection person moves the stopper ring 18 into the stopper ring housing groove 24 so that the ring body 90 is fitted on the female member 10. At this time, the claw insertion hole 80 is first passed through the three retaining claws 92 shown in FIG. 5 that are neither the first retaining pawl 92A nor the second retaining pawl 92B. Thereafter, the claw insertion hole 80 is passed through the first retaining claw 92A and the second retaining claw 92B using the retaining claw 92 that first penetrates the claw insertion hole 80 as a fulcrum. The retaining pawl 92 that passes through the claw insertion hole 80 connects the first distal end portion 98A and the first protrusion 99A of the first retaining pawl 92A with the second distal end portion 98B and the second protrusion 99B of the second retaining pawl 92B. Is engaged with the retaining groove 54 of the male member 12. The 1st protrusion part 95 and the 2nd protrusion part 96 surround the female-type member 10 (receiving part 20) with the ring main body 90. FIG. The width of the opening 93 of the stopper ring 18 is generally maintained at the normal width w.

  After attaching the stopper ring 18 to the female member 10, the connecting person attaches the covering material 100 to the female member 10 so that the stopper ring 18 is covered from the outside in the radial direction. That is, the connecting person moves the reinforcing ring 102 so as to cover the stopper ring 18. Then, the connecting person slides the cover 104 in the direction in which the entrance 40 is located. Thereby, the annular cover portion 130 of the cover 104 covers the stopper ring 18 and the reinforcing ring 102. Thereby, the connection between the synthetic resin pipe 900 and the synthetic resin pipe 902 by the pipe joint according to the present embodiment is completed.

[Effect of pipe joint according to this embodiment]
In the pipe joint according to the present embodiment, the stopper claw 92 penetrating the claw insertion hole 80 is attached to the stopper groove 18 of the male member 12 by mounting the stopper ring 18 in the stopper ring receiving groove 24 (female member 10). 54 is engaged. At this time, the stopper ring 18 is externally fitted so as to embrace the female member 10 using the ring main body 90, the first projecting portion 95, and the second projecting portion 96. When the stopper ring 18 is thus attached to the female member 10, the male member 12 moves from the female member 10 to at least one of the female member 10 and the male member 12 due to generation of internal pressure of the pipe joint. When a pulling force is applied in the direction of withdrawal, a force is applied to the stopper ring 18 so as to expand the stopper ring 18 outward in the radial direction of the female member 10. Thereby, in the stopper ring 18, the space between the first retaining claw 92A and the second retaining claw 92B and the opening 93 between the first projecting portion 95 and the second projecting portion 96 are expanded. The portion 93 can be kept narrow with respect to the portion where the stopper ring 18 is mounted (the stopper ring receiving groove 24) in the female member 10. Therefore, it is difficult for the stopper ring 18 to be detached from the female member 10.

  Moreover, in the stopper ring 18, the first projecting portion 95 supports the first retaining claws 92 </ b> A together with the ring main body 90. The 2nd protrusion part 96 will support the 2nd retaining claw 92B with the ring main body 90. FIG. Therefore, the strength in the vicinity of the first retaining claw 92A and the vicinity of the second retaining claw 92B can be improved. Therefore, even when the stopper ring 18 expands due to the aforementioned pulling force, it is possible to suppress the deformation of the first retaining claws 92A and the second retaining claws 92B due to contact with the female member 10 or the like. Therefore, the engagement of the first retaining claws 92A and the second retaining claws 92B with respect to the retaining grooves 54 is easily maintained. As a result, when the female member 10 and the male member 12 are connected, the insertion-side end portion 30 (male member 12) is difficult to come out of the receiving portion 20 (female member 10).

  In the pipe joint according to the present embodiment, when the first retaining claw 92A and the second retaining claw 92B are engaged with the retaining groove 54, they do not have the first protrusion 99A and the second protrusion 99B. Compared to the case, since the area engaged with the male retaining groove 54 is increased by the amount of the first protrusion 99A and the second protrusion 99B, the first retaining pawl 92A and the second retaining pawl 92B are less likely to be removed from the retaining groove 54. Therefore, the engagement of the first retaining claws 92A and the second retaining claws 92B with respect to the retaining grooves 54 is more easily maintained. Therefore, when the female member 10 and the male member 12 are connected, the male member 12 becomes more difficult to be removed from the female member 10.

  Moreover, in the pipe joint concerning this embodiment, since the coating | coated material 100 is provided, the male type | mold member 12 once connected to the female type | mold member 10 becomes still more difficult to remove. This is because the stopper ring 18 is unlikely to come off from the stopper ring receiving groove 24.

<Description of modification>
The embodiments disclosed herein are illustrative in all respects. The scope of the present invention is not limited based on the above-described embodiment, and various design changes may be made without departing from the spirit of the present invention. For example, an annular thing is not limited to an annular shape among the pipe joints of this embodiment mentioned above. Their shape may be a polygon with a hole in the center. Moreover, the 1st protrusion part and 2nd protrusion part in a stopper ring are not limited to what has the same structure like this embodiment mentioned above.

DESCRIPTION OF SYMBOLS 10 ... Female type | mold 12 ... Male type | mold member 14 ... Penetration seal 16 ... Gap seal 18 ... Stopper ring (stopper)
20 ... Receiving part 22 ... Synthetic resin pipe connecting part 24 ... Stopper ring receiving concave groove 30 ... Insertion side end 32 ... Saddle 34 ... Synthetic resin pipe connecting side end 40 ... Entrance 42 ... Seal receiving part 44 ... Gap Seal contact portion 46 ... penetrating seal housing portion 48 ... gap seal contact portion 50 ... penetrating seal contact portion 52 ... tip side seal surface 54 ... retaining groove 66 ... outer ring contact portion 68 ... support wall surface 76 ... facing surface 78 ... inner ring contact Part 80 ... Nail insertion hole (prevention tool entry hole)
90 ... Ring main body 92 ... Stopping claw 92A ... First locking claw 92B ... Second locking claw 93 ... Opening 95 ... First projection 96 ... Second projection 97A ... First base 97B ... Second base 98A ... First Tip portion 98B ... Second tip portion 99A ... First projection 99B ... Second projection 100 ... Covering material 102 ... Reinforcement ring 104 ... Cover 126 ... Slide groove 130 ... Ring cover portion 132 ... Engagement portion 900, 902 ... Synthetic resin tube w: Normal width of the stopper ring opening

Claims (3)

A female receiving member having a tubular receiving portion, and a stopper entry hole provided on the outer periphery of the receiving portion;
A male insertion member having a cylindrical insertion side end inserted into the receiving port, and a retaining groove provided on the outer periphery of the insertion side end;
An annular stopper that can be inserted through the stopper entry hole and fit into the retaining groove in order to prevent the insertion-side end of the male member inserted into the receptacle of the female member from slipping out. A pipe joint comprising:
The retaining tool is
An elastically deformable main body formed in an arc shape surrounding a portion of the female mold member that is half a circumference or more so that the female mold member can be externally fitted;
A plurality of retaining claws provided to protrude inwardly on the inner periphery of the main body and configured to be able to engage with retaining grooves of the male member in a state of penetrating the retaining tool entry hole;
A first projecting portion projecting along an arc shape of the main body from one circumferential end of the main body provided with a first retaining pawl among the plurality of retaining claws;
A pipe joint having a second projecting portion projecting along the arc shape of the main body from the other circumferential end of the main body provided with a second retaining pawl among the plurality of retaining claws. The first retaining pawl has a first tip and a first protrusion projecting from the first tip toward the second retaining pawl, and the first retaining pawl is engaged with the retaining groove. Fit the tip and the first protrusion into the retaining groove,
The second retaining pawl has a second tip and a second protrusion projecting from the second tip toward the first retaining pawl side, and the second retaining pawl is engaged with the retaining groove. The pipe joint according to claim 1, wherein a distal end portion and the second protrusion are fitted in the retaining groove.   The covering member attached to the female mold member while covering the retaining member so as to keep the plurality of retaining claws engaged with the retaining groove of the male member. The pipe joint according to claim 1 or 2.

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