JP2009144740A - Joint having adapter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint having an adapter easily connecting a resin pipe made of a polyolefine resin to a dissimilar pipe different from its resin pipe, while reducing manufacturing cost, by facilitating installation with a simple structure. <P>SOLUTION: A joint body 11 has an insertion hole 16 for inserting the resin pipe 15 on one end, and has an adapter insertion hole 18 for inserting an adapter 17 on the other end. A first cap 21 is connected to one end of the joint body 11, and a second cap 22 is connected to the other end. A slipping-out preventive ring 27 for preventing slipping-out of the resin pipe 15 is sandwiched between the one end of the joint body 11 and the first cap 21. The dissimilar pipe 36 is connected to an outer end part of the adapter 17. An engaging part 37 is arranged in an outer peripheral part of the adapter 17, and is constituted so as to prevent the slipping-out by engaging with a locking part 34 arranged in an inner peripheral part of the second cap 22. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a joint provided with an adapter used for connecting a resin pipe made of crosslinked polyethylene or polybutene and a pipe made of vinyl chloride resin, for example, in a piping system for water supply or hot water supply.

  In recent years, resin pipes made of polyolefin resins such as cross-linked polyethylene and polybutene have been used as pipes for water supply, hot water supply or drainage. On the other hand, for connection to the water tap and the stop cock, for example, a different type pipe such as vinyl chloride resin is used. As joints for connecting these resin pipes and different types of pipes, for example, the following adapters for connecting joints have been proposed (see, for example, Patent Document 1).

This adapter for connecting joints connects existing pipes and resin pipes, and is designed so that one end of the adapter can be inserted into a pipe joint having a water stop function and a pipe holding function, and the other end of the adapter. Is formed into a shape that can be adhesively bonded to an existing pipe. According to this connection joint adapter, the number of parts can be reduced and the screwing step can be omitted by simplifying the structure.
JP 2007-2917 A (page 2, page 4 and page 5)

  However, in the conventional adapter for connecting joint described in Patent Document 1, the collet for providing a pipe holding function provided at both ends of the pipe joint has a structure having claw portions on the inside, and the structure is complicated. In addition, the assembly is troublesome and the manufacturing cost is high. Such a collet is generally used for retaining a resin pipe made of polyolefin resin, and is not used for a pipe made of vinyl chloride resin or ABS resin. Therefore, it has been necessary to configure the collet so as to be able to exhibit a sufficient retaining function by adapting to a pipe (adapter) made of vinyl chloride resin or ABS resin.

  Therefore, the object of the present invention is to simplify the structure and facilitate the assembly, to reduce the manufacturing cost, and between the resin pipe made of polyolefin resin and a different kind of pipe. An object of the present invention is to provide a joint provided with an adapter that can be easily connected.

  In order to achieve the above object, a joint provided with the adapter of the invention according to claim 1 is connected to a resin pipe made of polyolefin resin at one end and to a different pipe different from the resin pipe at the other end. Is. That is, a joint body having an insertion hole into which a resin pipe is inserted at one end and an adapter insertion hole into which the inner end portion of the adapter is inserted at the other end, and a first cap connected to one end of the joint body A retaining member that is sandwiched between one end of the joint body and the first cap and prevents the resin pipe from coming off; a first seal ring that is provided on the inner peripheral portion of the joint body and that stops water between the resin pipe; and the joint A second cap connected to the other end of the main body, a second seal ring provided on the inner peripheral portion of the joint main body to stop water between the adapter, and an inner end portion inserted into the adapter insertion hole, and an outer end portion So that the engaging portion provided on the outer peripheral portion of the adapter engages with the engaging portion provided on the inner peripheral portion of the second cap and is prevented from coming off. Features that is composed That.

  According to a second aspect of the present invention, there is provided a joint including the adapter according to the first aspect, wherein the second cap is configured to be elastically deformable, and an engaging portion of the adapter is formed to protrude from an outer peripheral portion of the adapter. The inner end portion is inserted into the adapter insertion hole of the joint body, and the engaging portion of the adapter is engaged with the engaging portion of the second cap by elastic deformation of the second cap, so that the adapter is prevented from coming off. It is characterized by being.

  According to a third aspect of the present invention, there is provided a joint provided with the adapter according to the first aspect, wherein the engaging portion of the adapter is formed to protrude from the outer peripheral portion of the adapter, and the outer end portion of the adapter is inserted from the proximal end side of the second cap And it is comprised so that a 2nd cap may be connected with a coupling main body in the state engaged with the latching | locking part of the 2nd cap.

  According to a fourth aspect of the present invention, there is provided a joint provided with the adapter according to the second or third aspect, wherein a retaining ring that holds the connection of the second cap to the joint body is provided on the outer periphery of the base end portion of the second cap. It is mounted.

  The joint provided with the adapter of the invention according to claim 5 is the joint according to any one of claims 2 to 4, wherein the outer end portion of the adapter is connected to a different type pipe on the inner periphery or outer periphery thereof. It is configured.

  In the invention which concerns on Claim 1, it is comprised so that the engaging part provided in the outer peripheral part of the adapter may engage with the latching | locking part provided in the inner peripheral part of the 2nd cap, and may be prevented from coming off. For this reason, for example, the adapter is prevented from coming off by an operation of inserting the inner end portion of the adapter into the adapter insertion hole of the joint body and engaging the engaging portion of the adapter with the engaging portion of the second cap. Therefore, the structure of the joint can be simplified to facilitate the assembly, the manufacturing cost can be reduced, and the resin pipe made of polyolefin resin can be easily connected to a different type of pipe. Can do.

  In the invention according to claim 2, the second cap is configured to be elastically deformable, and the engaging portion of the adapter is formed to protrude from the outer peripheral portion of the adapter, and the inner end portion of the adapter is inserted into the adapter insertion hole of the joint body. And the engaging part of the adapter is engaged with the engaging part of the second cap by the elastic deformation of the second cap so that the adapter is prevented from coming off. For this reason, in addition to the effect of the invention according to claim 1, the adapter can be easily connected to the joint body simply by inserting the adapter into the adapter insertion hole using the elastic deformation of the second cap.

  In the invention according to claim 3, the engaging portion of the adapter is formed so as to protrude from the outer peripheral portion of the adapter, and the outer end portion of the adapter is inserted from the base end side of the second cap to engage with the engaging portion of the second cap. In this state, the second cap is connected to the joint body. For this reason, in addition to the effect of the invention according to claim 1, the adapter can be easily engaged with the second cap, and can be fixed to prevent it from coming off.

  In the invention which concerns on Claim 4, the holding ring holding the connection of the 2nd cap with respect to a coupling main body is mounted | worn with the outer periphery of the base end part of the 2nd cap. For this reason, in addition to the effect of the invention according to claim 2 or claim 3, the connection of the second cap to the joint body can be maintained for a long period of time.

  In the invention which concerns on Claim 5, the outer end part of an adapter is comprised so that a dissimilar pipe may be connected to the inner periphery or outer periphery. Therefore, in addition to the effects of the invention according to any one of claims 2 to 4, the different types of pipes can be connected to the inner periphery or outer periphery of the adapter outer end portion by an adhesive or the like.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments that are considered to be the best of the present invention will be described in detail with reference to the drawings.
(First embodiment)
In this 1st Embodiment, it is an example about the coupling of the type which inserts the inner end part of an adapter in the insertion hole of a coupling main body.

  As shown in FIG. 1 (a), a substantially cylindrical joint body 11 constituting the joint 10 includes a pair of engaging tube portions 13 formed to protrude on both sides on the outer peripheral side, and both sides on the inner peripheral side. And a guide tube portion 14 formed to project. An insertion hole 16 into which the resin pipe 15 is inserted on one end side (left side in the drawing) and an inner end portion of the adapter 17 are inserted on the other end side (right side in the drawing) between the joint body 11 and the guide cylinder portion 14. An adapter insertion hole 18 is provided. A flow path 19 through which water flows is formed inside the guide tube portion 14.

  A plurality of engaging protrusions 20 are provided on the outer peripheral surface of the pair of engaging cylinder portions 13. The first cap 21 connected to one end side of the joint body 11 and the second cap 22 connected to the other end side are each provided with a plurality of engaging recesses 23 on the inner peripheral surface. Then, by engaging the first cap 21 and the second cap 22 with respect to the engagement tube portion 13 of the joint body 11, the engagement recess 23 is engaged with the engagement protrusion 20 of the engagement tube portion 13. The first cap 21 and the second cap 22 are configured to be connected to the joint body 11. An annular locking step portion 24 is provided on the inner peripheral surface of the engagement tube portion 13.

  An intermediate cylinder body 26 having an engagement step portion 25 engaged with the locking step portion 24 is disposed inside the engagement tube portion 13. A retaining ring 27 as a retaining member made of a metal such as stainless steel is regulated by a regulating body 28 between the outer end surface of the engagement cylinder portion 13 and the inner peripheral surface of the first cap 21. It is inserted in the state. A retaining piece 27a is formed on the inner peripheral portion of the retaining ring 27 so as to project obliquely, and the resin pipe 15 is retained by biting into the outer peripheral portion of the resin pipe 15. A split ring 29 is interposed between the retaining ring 27 and the inner peripheral surface of the first cap 21 so as to maintain the inclination angle of the retaining piece 27a.

  The outer end surface of the split ring 29 has the same inclination angle as the inner peripheral surface of the first cap 21, and the split ring 29 is moved outward in the axial direction via the retaining piece 27 a by the force in the pulling direction of the resin pipe 15. When receiving a force, the split ring 29 is configured to be reduced in diameter. A fastening surface 30 provided on the inner peripheral surface of the split ring 29 is adapted to fasten the resin pipe 15. A first seal ring 31 made of rubber is disposed between the joint main body 11 and the intermediate cylinder 26 so as to be in close contact with the outer peripheral surface of the resin pipe 15 to be inserted. .

  Inside the split ring 29, an insertion guide 32 that is pressed by the tip of the resin pipe 15 to guide the insertion of the resin pipe 15 is disposed. The insertion guide 32 is formed in a C-ring shape and can be expanded and contracted. The outer diameter of the insertion guide 32 is the same as or slightly larger than the outer diameter of the resin pipe 15, and the inner diameter is slightly larger than the outer diameter of the guide tube portion 14. An inner peripheral surface of the split ring 29 is provided with a retaining step, and the outer periphery of the outer end surface of the insertion guide 32 is engaged with the retaining step so that the insertion guide 32 is retained. ing. A circular arc surface is formed on the inner end side of the insertion guide 32 so that the insertion guide 32 can move smoothly when the outer circumferential surface of the guide tube portion 14 moves inward. Further, when the insertion guide 32 moves along with the insertion of the resin pipe 15 and comes into sliding contact with the retaining piece 27a and the first seal ring 31 of the retaining ring 27, the retaining piece 27a and the first seal ring 31 are gradually moved. The insertion guide 32 itself is reduced in diameter at the same time.

  A locking groove 40 is formed in the outer peripheral surface of the first cap 21, and a retaining ring 41 made of stainless steel is attached to the outer periphery of the base end portion of the first cap 21 to lock the locking claw 43 on the distal end side of the first cap 21. It is mounted in a state of being locked in the locking groove 40 of 21. The connection of the first cap 21 to the joint body 11 is maintained.

  On the second cap 22 side of the joint body 11, a second rubber seal ring 33 is disposed between the joint body 11 and the intermediate cylinder 26, and is provided on the outer peripheral surface of the inner end portion of the adapter 17 to be inserted. The water stops closely. On the inner peripheral surface of the distal end portion of the second cap 22, a locking portion 34 formed of a tapered surface whose diameter decreases toward the distal end is provided. On the second cap 22 side, a retaining ring 27, a split ring 29, and the like as retaining members are not provided.

  The adapter 17 is formed in a substantially cylindrical shape, the inner end portion is inserted into the adapter insertion hole 18, and the dissimilar pipe 36 made of vinyl chloride resin is connected to the inside of the enlarged diameter portion 35 at the outer end portion by adhesion. Yes. An engaging portion 37 having a mountain-shaped cross section (triangular cross section) is provided on the outer peripheral surface of the center portion of the adapter 17, and the engaging portion 37 engages with a locking portion 34 on the inner peripheral surface of the second cap 22. Thus, the adapter 17 is configured to be held against the second cap 22. The engaging portion 37 includes an inner end-side inclined surface 38 and an outer end-side inclined surface 39, and the inclination angle of the inclined surface 39 is set to be larger than the inclination angle of the inclined surface 38. . On the other hand, the inclination angle of the tapered surface forming the locking portion 34 of the second cap 22 is set to be substantially the same as the inclination angle of the inclined surface 39 of the engaging portion 37.

  That is, it is easy to insert the adapter 17 into the adapter insertion hole 18, and it is difficult for the adapter 17 to come out of the second cap 22 after the engaging portion 37 of the adapter 17 is engaged with the engaging portion 34 of the second cap 22. . Therefore, by inserting the inner end portion of the adapter 17 into the adapter insertion hole 18 of the joint body 11, the engaging portion 37 of the adapter 17 hits the distal end portion of the second cap 22, and the second cap 22 is elastically deformed, The engaging portion 37 can be easily engaged with the locking portion 34 of the second cap 22.

  A locking groove 40 is formed on the outer peripheral surface of the second cap 22, and a retaining ring 41 made of stainless steel is provided on the outer periphery of the proximal end portion of the second cap 22 to lock the locking claw 43 on the distal end side thereof. It is mounted in a state of being locked in the locking groove 40 of 22. The connection of the second cap 22 to the joint body 11 is maintained.

  The first cap 21, the second cap 22, the adapter 17, the joint body 11, the intermediate cylinder 26, the split ring 29, the insertion guide 32, and the like are made of polyacetal (POM), polyphenylene sulfide (PPS) (these are engineering plastics), It is made of a synthetic resin such as vinyl chloride resin. In this case, the adapter 17 is preferably formed of the same kind of material as that of the dissimilar pipe 36 in terms of adhesiveness. The joint body 11 can also be formed of a metal such as an alloy (brass, bronze, etc.). The resin pipe 15 is made of a polyolefin resin such as cross-linked polyethylene or polybutene. Furthermore, the dissimilar pipe 36 is made of a metal such as copper or a copper alloy in addition to a synthetic resin such as vinyl chloride resin. Incidentally, when the dissimilar pipe 36 is a metal such as copper or a copper alloy, the adapter 17 is formed of a metal such as brass, and the dissimilar pipe 36 is bonded to the adapter 17 by brazing.

Next, the effect | action is demonstrated about the coupling 10 provided with the adapter 17 comprised as mentioned above.
As shown in FIG. 1A, when the inner end portion of the adapter 17 is inserted from the opening portion of the second cap 22 and fitted into the guide tube portion 14, the engaging portion 37 of the adapter 17 is moved to the second cap 22. Hit the tip. Subsequently, as shown in FIG. 1 (b), when the adapter 17 is further inserted, the inner end portion of the adapter 17 enters the adapter insertion hole 18, and at the same time, the inclined surface 38 of the engaging portion 37 is within the distal end portion of the second cap 22. The outer end of the second cap 22 is expanded by elastic deformation. At this time, the outer peripheral surface of the inner end portion of the adapter 17 is in sliding contact with the second seal ring 33, and the space between the joint body 11 and the adapter 17 is stopped.

  Next, as shown in FIG. 2A, when the adapter 17 is further inserted, the engaging portion 37 of the adapter 17 enters the inside of the second cap 22, and the oblique surface 39 of the engaging portion 37 is the second cap. The engagement portion 34 is engaged over the entire circumference with a tapered surface forming the engagement portion 34 of the 22. For this reason, the adapter 17 is prevented from being detached from the second cap 22, in other words, the joint body 11. The assembly of the adapter 17 to the joint body 11 as described above can be performed in advance in the factory, or can be performed when the resin pipe 15 and the dissimilar pipe 36 are connected on site.

  When the resin pipe 15 is inserted from the opening of the first cap 21 with the adapter 17 assembled to the joint body 11, the tip surface of the resin pipe 15 comes into contact with the insertion guide 32. In this state, as shown in FIG. 2B, when the resin pipe 15 is further inserted, the resin pipe 15 is guided by the insertion guide 32, and the insertion guide 32 and the resin pipe 15 are attached to the retaining piece 27a of the retaining ring 27. The leading end of the insertion guide 32 reaches the first seal ring 31. At this time, since the circular arc surface is formed on the inner end side of the insertion guide 32, the circular arc surface slides on the retaining piece 27a to gradually increase the diameter of the retaining piece 27a, and at the same time, the insertion guide 32 The diameter itself is reduced. Accordingly, the insertion guide 32 and the resin pipe 15 can smoothly pass through the retaining ring 27.

  Then, the distal end portion of the insertion guide 32 is inserted to the inner end portion of the insertion hole 16. At this time, since an arc surface is formed at the inner end of the insertion guide 32, the arc surface slides on the first seal ring 31 to gradually expand the diameter of the first seal ring 31, and the insertion guide 32 is inserted at the same time. The guide 32 itself is reduced in diameter. Therefore, the insertion guide 32 and the resin pipe 15 smoothly pass through the first seal ring 31, and water is stopped between the insertion guide 32 and the resin pipe 15.

  Thereafter, an adhesive is applied to the outer peripheral surface of the end portion of the dissimilar pipe 36 made of vinyl chloride resin, and then inserted into the enlarged diameter portion 35 of the adapter 17, so that the dissimilar pipe 36 is joined to the adapter 17. In this way, the resin pipe 15 is connected to one end of the joint 10 provided with the adapter 17, and the dissimilar pipe 36 is connected to the other end.

The effects exhibited by the above first embodiment will be described collectively below.
In the joint 10 of the first embodiment, the engaging portion 37 provided on the outer peripheral portion of the adapter 17 is engaged with the engaging portion 34 provided on the inner peripheral portion of the second cap 22 so as to be prevented from coming off. It is configured. For this reason, the adapter 17 can be prevented from coming off by a simple operation of inserting the adapter 17 into the joint body 11 and engaging the engaging portion 37 with the engaging portion 34 of the second cap 22. Further, a retaining ring 27, a split ring 29, and the like as retaining members are omitted on the second cap 22 side of the joint 10. Therefore, the structure of the joint 10 can be simplified to facilitate assembly, the manufacturing cost can be reduced, and the resin pipe 15 and the dissimilar pipe 36 can be easily connected.

  The second cap 22 is configured to be elastically deformable, and the inner end portion of the adapter 17 is inserted into the adapter insertion hole 18 of the joint body 11, and the engagement portion 37 of the adapter 17 is moved to the second position by elastic deformation of the second cap 22. The adapter 17 is configured to be retained by being engaged with the locking portion 34 of the cap 22. For this reason, the adapter 17 can be easily connected to the joint body 11 simply by using the elastic deformation of the second cap 22 and inserting the adapter 17 into the adapter insertion hole 18.

A holding ring 41 that holds the connection of the second cap 22 to the joint body 11 is attached to the outer periphery of the base end portion of the second cap 22. Therefore, the connection of the second cap 22 to the joint body 11 can be maintained for a long period.
(Second Embodiment)
Next, a second embodiment embodying the present invention will be described. In the second embodiment, the same members as those in the first embodiment are denoted by the same member numbers, and the description of the same parts is omitted.

  The second embodiment is an example of a joint 10 of a type in which the assembly structure of the adapter 17 with respect to the second cap 22 is different from that of the first embodiment, and a different type pipe 36 is joined to the inside of the adapter 17. As shown in FIG. 3A, the structure of the portion connecting the resin pipe 15 on the first cap 21 side is the same as that of the first embodiment. The second cap 22 is provided with a locking portion 34 whose tip is bent at a right angle toward the inner peripheral side. On the other hand, an engaging portion 37 having a square cross section is provided on the outer peripheral surface of the adapter 17. 3B, the outer end portion of the adapter 17 is inserted from the proximal end side of the second cap 22, and the engaging portion 37 of the adapter 17 is engaged with the engaging portion 34 of the second cap 22. At the same time, the outer end of the adapter 17 is projected from the second cap 22.

In the second embodiment, the adapter 17 is previously assembled to the second cap 22 as described above, and the integrated second cap 22 is fitted to the engagement tube portion 13 of the joint body 11. . After that, the retaining ring 41 is fitted on the second cap 22, and the locking claw 43 is locked in the locking groove 40 of the second cap 22, so that the second cap 22 is prevented from coming off from the engaging tube portion 13. Retained. The dissimilar pipe 36 is inserted into the enlarged diameter portion 35 of the adapter 17 and joined by an adhesive. As shown by the two-dot chain line in FIG. 3A, the different type pipe 36 can be fitted on the outer periphery of the enlarged diameter portion 35 of the adapter 17 and can be joined by an adhesive. Therefore, according to the second embodiment, the adapter 17 can be easily and surely engaged with the second cap 22 and can be fixed and prevented from coming off.
(Third embodiment)
Next, a third embodiment embodying the present invention will be described. Note that in the third embodiment, members similar to those in the second embodiment are denoted by the same member numbers, and description of the same portions is omitted.

  In the third embodiment, the shape of the engaging portion 34 of the second cap 22 and the shape of the engaging portion 37 of the adapter 17 are different from those of the second embodiment, and a different type pipe 36 is externally fitted to the outside of the adapter 17. This is an example of a joint 10 of the type to be joined. As shown in FIG. 4A, the structure of the portion connecting the resin pipe 15 on the first cap 21 side is the same as in the second embodiment. The 2nd cap 22 has the latching | locking part 34 which makes the shape of the front-end | tip part the same shape as the 2nd cap 22 of 1st Embodiment. On the other hand, on the outer peripheral surface of the adapter 17, an engaging portion 37 having the same shape as the convex portion having a square cross section and the tapered surface of the locking portion 34 of the second cap 22 is provided. 4B, the outer end portion of the adapter 17 is inserted from the proximal end side of the second cap 22, and the engaging portion 37 of the adapter 17 is engaged with the engaging portion 34 of the second cap 22. At the same time, the outer end of the adapter 17 is projected from the second cap 22.

  In the third embodiment, the adapter 17 is assembled to the second cap 22 in advance as described above, and the integrated second cap 22 is fitted to the engagement tube portion 13 of the joint body 11. Thereafter, the retaining ring 41 is fitted on the second cap 22, and the locking claw 43 is locked in the locking groove 40 of the second cap 22, so that the second cap 22 is engaged with the engaging cylinder portion 13. Retains retention. The dissimilar pipe 36 is inserted into the outer end of the adapter 17 and joined with an adhesive. Therefore, according to the third embodiment, the adapter 17 can be easily and surely engaged with the second cap 22 and can be fixed and prevented from coming off.

In addition, this embodiment can also be changed and embodied as follows.
As shown in FIG. 5A, in the first embodiment, the tapered surface constituting the locking portion 34 of the second cap 22 is formed so as to be orthogonal to the axial direction of the second cap 22, The inclined surface 39 constituting the engaging portion 37 of the adapter 17 can be formed so as to be orthogonal to the axial direction of the adapter 17. In this case, it is possible to improve the retaining performance of the adapter 17 with respect to the second cap 22.

  As shown in FIG. 5 (b), in the first embodiment, the engaging portion 34 of the second cap 22 is formed in a convex shape, and the engaging portion 37 of the adapter 17 is formed in a concave shape. It is also possible to configure so that 34 is engaged with the engaging portion 37.

  As shown in FIG. 6A, in the second embodiment or the third embodiment, the locking portion 34 of the second cap 22 is inclined so as to extend toward the proximal end toward the inner peripheral side, and the adapter 17 It is also possible to incline the engaging portion 37 so as to extend toward the outer end side toward the outer peripheral side. In this case, the engagement of the adapter 17 with the second cap 22 can be further strengthened.

As shown in FIG. 6B, in the second embodiment, the adapter 17 can be configured to have a shape in which the engaging portion 37 is integrated with the intermediate cylindrical body 26.
-In 1st Embodiment, the shape of the engaging part 37 can also be formed in cross-sectional arc shape, cross-sectional trapezoid shape, etc. FIG.

  -When an external thread or an internal thread is threaded on the outer peripheral surface of the adapter 17 and a screw-type pipe (such as iron) is used as the dissimilar pipe 36, the end of the dissimilar pipe 36 is connected to the male or female thread of the adapter 17. It can also be connected by screwing.

-In 1st Embodiment, the adapter 17 can also be comprised so that the dissimilar pipe 36 may be inserted by the outer periphery and joined like 3rd Embodiment.
Further, the technical idea that can be grasped from the embodiment will be described below.

  (1) The joint provided with the adapter according to claim 2, wherein the engaging portion of the adapter is formed in a mountain shape in cross section. When comprised in this way, in addition to the effect of the invention which concerns on Claim 2, while inserting the adapter with respect to a 2nd cap can be made easy, sufficient engagement of the engaging part of the adapter with respect to the latching | locking part of a 2nd cap Can be achieved.

  (2) The technical feature is characterized in that the inclination angle of the inclined surface on the outer end side of the engaging portion having the mountain-shaped cross section is set to be larger than the inclination angle of the inclined surface on the inner end side. A joint provided with the adapter as described in Thought (1). In this case, in addition to the effect of the invention according to the technical idea (1), the adapter can be more easily inserted into the second cap and the engaging portion of the adapter with respect to the locking portion of the second cap can be provided. Engagement can be improved.

(A) is a half longitudinal cross-sectional view which shows the coupling provided with the adapter in 1st Embodiment, (b) is a semi-longitudinal sectional view which shows the state which inserted the adapter in the coupling main body from the state of (a). (A) is a semi-longitudinal sectional view showing a state in which the adapter is further inserted into the joint body from the state of FIG. 1 (b) and the engaging part is engaged with the engaging part of the second cap; (b) FIG. 6A is a half longitudinal sectional view showing a state where a resin pipe and a different kind of pipe are inserted into the joint in the state of (a). (A) is a longitudinal cross-sectional view which shows the coupling provided with the adapter in 2nd Embodiment, (b) is sectional drawing which decomposes | disassembles and shows an adapter, a 2nd cap, and a holding ring. (A) is a longitudinal cross-sectional view which shows the coupling provided with the adapter in 3rd Embodiment, (b) is sectional drawing which decomposes | disassembles and shows an adapter, a 2nd cap, and a holding ring. (A) And (b) is sectional drawing which shows the latching | locking part of the 2nd cap as another example, and the engaging part of an adapter. (A) is sectional drawing which shows the latching | locking part of the 2nd cap as another example, and the engaging part of an adapter, (b) is sectional drawing which mainly shows the engaging part of the adapter as another example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Joint, 11 ... Joint main body, 15 ... Resin pipe, 16 ... Insertion hole, 17 ... Adapter, 18 ... Adapter insertion hole, 21 ... 1st cap, 22 ... 2nd cap, 27 ... Retaining member, 31 ... 1st seal ring, 33 ... 2nd seal ring, 34 ... Locking part, 36 ... Dissimilar pipe, 37 ... Engagement part, 41 ... Holding ring.

Claims (5)

A joint provided with an adapter to which a resin pipe made of polyolefin resin is connected at one end and a different pipe different from the resin pipe is connected to the other end,
A joint body having an insertion hole into which the resin pipe is inserted at one end and an adapter insertion hole into which the inner end portion of the adapter is inserted at the other end, a first cap coupled to one end of the joint body, and a joint A retaining member that is sandwiched between one end of the main body and the first cap and prevents the resin pipe from falling off, a first seal ring that is provided on the inner peripheral portion of the joint body and that stops water between the resin pipe, A second cap connected to the other end, a second seal ring that is provided on the inner peripheral portion of the joint body and stops water between the adapter, an inner end portion is inserted into the adapter insertion hole, and a different type is formed at the outer end portion An adapter to which the pipe is connected, and the engaging portion provided on the outer peripheral portion of the adapter is configured to engage with the locking portion provided on the inner peripheral portion of the second cap to prevent the adapter from coming off. Adapts characterized by Joint with over. The second cap is configured to be elastically deformable, and the engaging portion of the adapter is formed to protrude from the outer peripheral portion of the adapter, and the inner end portion of the adapter is inserted into the adapter insertion hole of the joint body so that the second cap is elastic. The joint provided with the adapter according to claim 1, wherein the adapter is configured to be engaged with the engaging portion of the second cap by deformation to prevent the adapter from coming off. The engaging portion of the adapter protrudes from the outer peripheral portion of the adapter, and the second cap is inserted in the state where the outer end portion of the adapter is inserted from the proximal end side of the second cap and engaged with the engaging portion of the second cap. The joint comprising the adapter according to claim 1, wherein the joint is configured to be coupled to the joint body. The adapter according to claim 2 or 3, wherein a holding ring that holds the connection of the second cap to the joint body is attached to the outer periphery of the base end portion of the second cap. Fittings. The adapter according to any one of claims 2 to 4, wherein the outer end portion of the adapter is configured such that a different kind of pipe is connected to an inner periphery or an outer periphery thereof. Fittings.

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