JP2009014017A - Fitting, connection end of water conduction conduit, and connection method of water conduction conduit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fitting capable of selecting a connection method according to the situation, securely connecting a water conduction conduit, and making it easy to redo the connection. <P>SOLUTION: The fitting 2 comprises a socket 3 inserted by an end part 1a of the water conduction conduit 1, a water cutoff member 4, an engagement body 5 detachably attached to the socket 3, and inserted by the end part 1a, and a mounting body 6a engaged with the engagement body 5. The engagement body 5 comprises a cylindrical engagement body main body 5a fitted into the outside the end part 1a, and a locking ring 5b held inside the engagement body main body 5a to make the end part 1a pas through. The locking 5b has a locking pawl 5d locking the end part 1a and capable of elastically deforming. When the engagement body 5 is fitted with the end part 1a inserted into the socket 3, the mounting body 6a can be attached to the socket 3 so as to approach from the lateral side of the water conduction conduit 1, and can be removed from the socket 3 so as to move away from the water conduction conduit 1 laterally. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a joint to which a water pipe made of synthetic resin is connected, a connection end of the water pipe, and a method for connecting the water pipe.

  Conventionally, there has been a joint to which a water pipe made of synthetic resin is connected (for example, see Patent Document 1). As shown in FIG. 13, in this joint 11, a lock ring 13 is provided at the pipe connection portion 12. Then, when connecting a water pipe (not shown) to the pipe connecting part 12, when the water pipe is inserted into the pipe connecting part 12, the lock ring 13 is engaged with the water pipe, and thus the water pipe is pulled out. Prevented. Further, the joint 11 may be formed of a transparent synthetic resin so that the insertion state of the water pipe can be confirmed.

JP 2003-130266 A

  However, in the conventional joint 11, if the joint 11 is installed in a place where it is difficult to visually recognize or where it is difficult to insert the water pipe, it is difficult to check the insertion state of the water pipe into the joint 11. Or the water pipe may not be inserted to the depth of the pipe connection portion 12.

  Further, when a mistake is made in connecting the water pipe to the joint 11, the release of the water pipe from the joint 11 is not considered. For this reason, in such a case, the water pipe must be cut and the joint 11 must be replaced and reconnected.

  The present invention has been made to solve the above-described conventional drawbacks, and the object of the present invention is to select a connection method according to the situation and to reliably connect the water pipe. An object of the present invention is to provide a joint that can be easily connected and reconnected.

  Another object of the present invention is to provide a connection end of a water pipe and a method of connecting the water pipe that can reliably connect the water pipe and can easily perform reconnection. .

In order to achieve the above object, a joint, a water pipe connecting end, and a water pipe connecting method according to the present invention have the following configurations. That is,
The joint according to the first aspect of the present invention is a joint to which a water pipe made of synthetic resin is connected. In this joint, the end portion of the water pipe is stopped between the receiving port into which the end portion is inserted in the connecting direction facing one of the axial directions of the end portion, and between the receiving port and the end portion. A water stop member that can be attached to the receiving port in the connection direction and can be removed in an opposite connection direction opposite to the connection direction, in which the end portion is inserted. And a mounting body that is detachably attached to the receiving port and engages with the engaging body so that the engaging body is prevented from being detached from the receiving port. Here, the engagement body includes a cylindrical engagement body main body that fits outside the end portion, and a retaining ring that is held inside the engagement body main body and through which the end portion passes. The retaining ring includes a ring main body and an elastically deformable locking claw that extends inward from the ring main body so as to incline in the connection direction and locks the end portion. Have. And the said attachment body can be attached to the said receptacle so that it may approach from the side of the said water flow pipe in the state with which the said engagement body in which the said edge part part was inserted was mounted | worn with the said receptacle. In addition, it is formed so as to be removable from the receiving port so as to be separated from the water pipe sideways.

  According to this joint, when connecting a water pipe to a joint, two connection methods can be taken. As a first connection method, the engagement body is attached to the joint opening in advance, and the attachment body is further attached, so that the engagement body is prevented from being detached from the reception opening by the attachment body. Keep it. And the edge part part of a water flow pipe is inserted with respect to the receptacle to which this engaging body and attachment body were attached. Thereby, the locking claw of the retaining ring in the engaging body locks the end portion of the water pipe, and this water pipe is connected to the receiving port, that is, the joint. As a second connection method, the engagement body and the attachment body are not attached to the joint opening. And in the edge part of a water flow pipe, the edge part is previously inserted in the engagement body. At this time, the locking claw of the retaining ring in the engaging body locks the end portion of the water pipe, and the engaging body is attached to the end portion of the water pipe. Therefore, the end portion of the water pipe to which the engagement body is attached is inserted into the joint receiving port, and the attachment body is attached. As a result, the engaging body is prevented from being detached from the receiving port by the attachment body, and the water pipe is connected to the receiving port, that is, the joint. Thus, in connecting a water pipe to a joint, since there are two connection methods, one of these connection methods can be selected according to a situation. In particular, by selecting the second connection method, i.e., by attaching the engaging body to the end portion of the water pipe outside in advance before inserting the water pipe into the joint opening, The insertion state of the part can be grasped. Therefore, by inserting the end portion of the water pipe to which such an engagement body is attached into the receiving port of the joint, even if the joint is in a place where it is difficult to visually recognize or in a place where the water pipe is difficult to insert. The water pipe can be securely connected to the joint.

  On the other hand, in order to remove the water pipe from the joint, first, the attachment body is removed from the joint receiving port. And the edge part of a water pipe is removed from the joint receiving port in the state to which the engaging body was attached. In this way, the water pipe can be removed from the joint together with the engaging body. However, the second connecting method can be used to connect the water pipe to which the engaging body is attached to the joint again. The connection can be easily re-executed.

  Further, like the joint according to the invention described in claim 2, in the joint according to claim 1, the engagement body may include a plurality of the retaining rings in the axial direction of the engagement body main body. .

  Further, like the joint according to the invention according to claim 3, in the joint according to claim 1 or 2, the water-stop member is disposed on the back side of the receiving port with respect to the engaging body, You may stop water between the said receiving port and the outer peripheral surface of the edge part of the said water flow pipe.

  Moreover, in the joint according to any one of claims 1 to 3, as in the joint according to the invention according to claim 4, a cylindrical core portion that fits inside the end portion of the water pipe is provided. The core part may be provided at a position corresponding to at least the engagement body.

  Further, as in the joint according to the invention according to claim 5, in the joint according to claim 3, the joint includes a cylindrical core portion that fits inside the end portion of the water pipe, You may provide in the position corresponding to the said water stop member and the said engagement body at least.

  Moreover, in the joint according to any one of claims 1 to 5, as in the joint according to the invention according to claim 6, the receiving port has an end portion of the water pipe beyond a predetermined position. It is desirable to have a restricting part that restricts the traveling in the connecting direction.

  In addition, the connecting end of the water pipe according to the invention of claim 7 has an axial center of the end portion of the water pipe at the joint opening to connect the water pipe made of synthetic resin to the joint. It is the connection end part inserted toward the connection direction which faces one side of a direction. The connecting end portion can be attached to the end portion and the receiving port in the connecting direction and can be pulled out in an opposite connecting direction opposite to the connecting direction. And an engagement body attached to the end portion so that the portion is inserted. Here, the engaging body is engageable with a locking means provided at the receiving port so as to be prevented from coming off from the receiving port. The engaging body includes a cylindrical engaging body main body that fits outside the end portion, and a retaining ring that is held inside the engaging body main body and through which the end portion passes. The retaining ring includes a ring main body and an elastically deformable locking claw that extends inward from the ring main body so as to incline in the connection direction and locks the end portion. Have.

  According to the connection end portion of the water pipe, by inserting the end portion of the water pipe into the engaging body, the locking claw of the retaining ring in the engaging body locks the end portion of the water pipe, and the engaging body Is attached to the end portion of the water pipe. Therefore, when connecting the water pipe to the joint, the end portion of the water pipe to which the engaging body is attached, that is, the connecting end is inserted into the joint opening, and the engaging means is engaged with the engaging body. Let As a result, the engaging body is prevented from coming off from the receiving port by the locking means, and the water pipe is connected to the receiving port, that is, the joint. Thus, before inserting a water pipe into a socket of a joint, an insertion state of an end part to an engagement body can be grasped by attaching an engagement body to the end part of a water pipe beforehand beforehand. . Therefore, by inserting the end portion of the water pipe to which such an engagement body is attached, that is, the connection end portion, into the receiving port of the joint, the joint is in a place where it is difficult to visually recognize or a place where the water pipe is difficult to insert. Even in this case, the water pipe can be reliably connected to the joint.

  On the contrary, in order to remove the water pipe from the joint, first, the engagement of the locking means with the engaging body is released. And the edge part of a water flow pipe is removed from the joint opening in the state to which the engaging body was attached, ie, the state of a connection end. In this way, the water pipe can be removed from the joint together with the engaging body. However, the water pipe to which the engaging body is attached can be connected to the joint again in the same manner. It can be done easily.

  Further, as in the connection end portion of the water pipe according to the eighth aspect of the invention, in the connection end portion according to the seventh aspect, the engagement body includes the retaining ring and the axial center of the engagement body main body. A plurality may be provided in the direction.

  Moreover, like the connection end part of the water flow pipe which concerns on invention of Claim 9, in the connection end part of Claim 7 or 8, the said engagement body is water-stopping in the outer peripheral surface in the said edge part part. You may provide in an edge part rear part back rather than the edge part front part for a member to closely_contact | adhere.

  Further, like the connection end portion of the water pipe according to the invention described in claim 10, the connection end portion according to claim 9, further comprising a cylindrical core member that fits inside the end portion portion, The core member may be provided at least in the rear portion of the end portion.

  Further, like the connection end portion of the water pipe according to the invention of claim 11, the connection end portion of claim 9, further comprising a cylindrical core member that fits inside the end portion portion, The core member may be provided at least at the end portion front portion and the end portion rear portion.

  A water pipe connecting method according to the invention of claim 12 is a water pipe connecting method for connecting the connecting end of the water pipe according to any one of claims 7 to 11 to a joint. Then, the connecting end portion, in which the engaging body is attached to the end portion, is inserted into the receiving port of the joint, and then the locking means is engaged with the engaging body.

  According to the joint according to the present invention, when connecting the water pipe to the joint, there are two connection methods, the first connection method and the second connection method, so one of these connection methods is selected depending on the situation. can do. Then, by selecting the second connection method, that is, before inserting the water pipe into the joint opening, the end of the water pipe is attached to the end portion of the water pipe in advance. The insertion state of the part can be grasped, and the end part of the water pipe to which such an engagement body is attached is inserted into the joint receiving port, so that the joint is difficult to see or the water pipe is removed. Even in a place where it is difficult to insert, the water pipe can be securely connected to the joint. Further, the water pipe can be removed from the joint with the engagement body attached, and the second connection method is used to connect the water pipe with the engagement body attached to the joint again. Therefore, reconnection can be easily performed.

  Further, according to the connection end portion of the water pipe and the method of connecting the water pipe according to the present invention, before inserting the water pipe into the receiving port of the joint, the engaging body is connected to the end portion of the water pipe beforehand in advance. By attaching, it is possible to grasp the insertion state of the end portion with respect to the engaging body. By inserting the end portion of the water pipe to which such an engaging body is attached into the receiving port of the joint, the joint is visually recognized. Even in a place where it is difficult to insert or where it is difficult to insert the water pipe, the water pipe can be securely connected to the joint. In addition, the water pipe can be removed from the joint with the engagement body attached, and the water pipe with the engagement body attached can be connected to the joint again in the same manner, For this reason, reconnection can be easily performed.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  1 to 7 show a first embodiment of the present invention. Reference numeral 1 in the figure denotes a flexible synthetic resin water pipe as a piping material, and is made of, for example, a synthetic resin pipe such as cross-linked polyethylene or polybden. Reference numeral 2 denotes a joint to which the water pipe 1 is connected.

  The joint 2 includes a receiving port 3 into which an end portion 1a of the water flow pipe 1 is inserted in a connecting direction P facing one of the end portions 1a in the axial center 1b direction, a water stop member 4, and an engaging body. 5 and locking means (specifically, attachment body 6a). Here, the water stop member 4 stops water between the receiving port 3 and the end portion 1a of the water conduit 1, and is made of packing such as O-ring.

  The engagement body 5 can be attached to the receiving port 3 in the connection direction P and can be removed in the opposite connection direction Q opposite to the connection direction P. The part 1a is inserted. The engaging body 5 can be engaged with a locking means 6 provided in the receiving port 3 so as to be prevented from coming off from the receiving port 3. And the engaging body 5 is hold | maintained inside the cylindrical engaging body main body 5a fitted in the outer side of the edge part 1a of the water flow pipe 1, and the engaging body main body 5a, and the edge part 1a of the water flow pipe 1 passes. And a retaining ring 5b. Here, the retaining ring 5b extends inward from the ring body 5c and inclines in the connection direction P from the ring body 5c, and locks the end portion 1a of the water conduit 1. It has the latching claw 5d which can be elastically deformed.

  The locking means 6 comprises an attachment body 6a, is detachably attached to the receiving port 3, and engages with the engaging body 5 so that the engaging body 5 is prevented from being detached from the receiving port 3. Is. The attachment body 6a can be attached to the receiving port 3 so that the engaging body 5 into which the end portion 1a of the water flow tube 1 is inserted is attached to the receiving port 3 so as to approach from the side of the water flow tube 1. In addition, it is formed to be removable from the receiving port 3 so as to be separated from the water pipe 1 to the side.

  Reference numeral 7 denotes a connection end that is inserted into the receiving port 3 of the joint 2 toward the connection direction P in order to connect the water pipe 1 to the joint 2. The connection end portion 7 of the water conduit 1 includes the end portion 1a and the engagement body 5 attached to the end portion 1a so that the end portion 1a is inserted.

  Specifically, the joint 2 includes a joint body 2a formed in a cylindrical shape so that water can pass through, and one end side of the joint body 2a is the receiving port 3. And the receiving port 3 has the control part 3a which controls that the edge part 1a of the water flow pipe 1 advances to the said connection direction P beyond a predetermined position. In the illustrated embodiment, the inside of the receiving port 3 is an accommodation hole 3b in which the end portion 1a of the water conduit 1 and the engagement body 5 are accommodated, and from the stepped portion to the inner end of the accommodation hole 3b. The restricting portion 3a is provided. The rear side of the accommodation hole 3b is a small diameter hole 3c into which an end part front part 1c (described later) of the end part 1a is fitted, and the mouth side of the accommodation hole 3b is a large diameter hole 3d into which the engagement body 5 is fitted. It has become. And the groove | channel 3e in which the water stop member 4 fits is formed in the surrounding surface of the small diameter hole 3c. Thus, the water stop member 4 is disposed on the back side of the receiving port 3 with respect to the engaging body 5, and the receiving port 3 and the outer peripheral surface of the end portion 1a (specifically, the end portion front portion 1c). The water will be stopped. Further, the receiving port 3 has holes 3f and 3f that open to the outer peripheral portion thereof (specifically, open to the attachment body insertion portions M and M projecting at four locations on the outer periphery of the receiving port 3). The housing hole 3b (specifically, the large diameter hole 3d) is opened across.

  The engagement body 5 includes a plurality of the retaining rings 5b (four in the illustrated embodiment) in the direction of the axis 5e of the engagement body main body 5a. Specifically, the retaining ring 5b is made of, for example, a metal plate material such as a stainless steel plate, the ring body 5c is formed in a flat ring shape, and the locking claw 5d is formed around the ring body 5c. A plurality (14 in the illustrated embodiment) are provided so as to be aligned in the direction (see FIG. 5). The locking claw 5d extends from the inner periphery of the ring main body 5c, and the tip portion is formed in a tapered shape so that the center protrudes. Here, the thickness of the retaining ring 5b is such that the outer peripheral surface of the water conduit 1 is not easily damaged when the end portion 1a of the water conduit 1 passes through the retaining ring 5b. It is desirable that it is -0.2 mm. And, by providing a plurality of retaining rings 5b, the force against the removal of the water pipe 1 is dispersed and absorbed. In particular, the number of retaining rings 5b is 3 to 5. desirable. However, the thickness and the number of the retaining rings 5b in the engagement body 5 can be selected depending on the force applied to the insertion of the water pipe 1 and the force applied to the extraction, and are not limited to the range of the thickness and the number. .

  The engagement body main body 5a includes a cylindrical body 5f and first and second support rings 5g and 5h which are accommodated in the cylindrical body 5f and supported so as to sandwich the retaining ring 5b. The cylindrical body 5f has a front piece 5i that is bent inward and extends at the front end so as to prevent the first support ring 5g from coming off. Therefore, the first support ring 5g and the retaining ring 5b are alternately inserted into the cylindrical body 5f from the rear, and finally the second support ring 5h is inserted. Then, the rear end of the cylindrical body 5f is caulked inward so as to suppress the second support ring 5h. Here, four first support rings 5g are provided in accordance with the number of retaining rings 5b. The inner diameter of the first support ring 5g is larger than the outer diameter of the water pipe 1, and a gap 5j for accommodating the locking claw 5d of the retaining ring 5b is formed between the first support ring 5g and the water pipe 1. Further, the inner diameter of the second support body 5 h is substantially the same as the outer diameter of the water pipe 1, and the second support body 5 h comes close to or comes into contact with the outer peripheral surface of the water pipe 1. In addition, in the said connection edge part 7, the engaging body 5 is an edge part part back of the edge part front part 1c for the water stop member 4 in close contact with the outer peripheral surface in the edge part 1a of the water flow pipe 1. Provided in the rear part 1d.

  By the way, this engaging body 5 is formed separately from the joint body 2a (specifically, the receiving port 3) or the water pipe 1 (specifically, the end portion 1a). The united body 5 is an engaging body attached to the receiving port 3, is an engaging body before being attached, or is an engaging body into which the end portion 1a of the water conduit 1 is inserted, It does not matter whether the engagement body is inserted or not. Moreover, although the coupling main body 2a and the engaging body 5 and the water pipe 1 and the engaging body 5 may be sold as a set, they may be sold separately. That is, the engagement body 5 may be sold separately.

  The attachment body 6a is made of, for example, a metal wire and is formed in a substantially U shape (see FIG. 2). The attachment body 6a is configured such that opposed pieces 6b, 6b facing each other in a substantially U shape are inserted into the holes 3f, 3f of the receiving port 3 so that the water pipe 1 is sandwiched between them. Match. At this time, the intermediate piece 6c connecting the opposing pieces 6b and 6b in the attachment body 6a is hooked on the engagement portion 3g provided in the receiving port 3, so that the attachment body 6a is prevented from coming off from the hole 3f. Is done. The latching portion 3g has a protrusion N that engages with the intermediate piece 6c and protrudes from the outer periphery of the receiving port 3. Since at least the protrusion N is elastically deformable, the attachment body 6a Can be attached to and detached from the receptacle 3 (see FIG. 3). In the illustrated embodiment, a pair of the latching portions 3g are provided on the outer periphery of the receiving port 3 so as to be opposed to each other with the large diameter hole 3d interposed therebetween.

  Further, the joint 2 includes a cylindrical core portion 8 that fits inside the end portion 1 a of the water conduit 1. The core portion 8 is provided at least at a position corresponding to the engaging body 5 (specifically, at least a position corresponding to the water stop member 4 and the engaging body 5). In the illustrated embodiment, the core portion 8 is composed of a core member 8 a that is separate from the receiving port 3, and the core member 8 a is connected to the end of the water conduit 1 in advance before inserting the water conduit 1 into the receiving port 3. It is inserted into the part 1a. Thus, the core member 8a includes at least the end portion rear portion 1d in the end portion 1a of the water conduit 1 (specifically, at least the end portion front portion 1c and the end portion rear portion in the end portion 1a). 1d).

  According to this joint 2, two connection methods can be adopted as a method of connecting the water pipe 1 to the joint 2. As a first connection method, as shown in FIG. 6, the engagement body 5 is attached to the receiving port 3 of the joint 2 in advance, and the attachment body 6 a is further attached. It is set in a state of being prevented from coming off from the receiving port 3 by 6a. And the edge part 1a of the water flow pipe 1 is inserted in the receptacle 3 to which this engagement body 5 and the attachment body 6a were attached (refer FIG. 6, FIG. 1). Thereby, the locking claw 5 d of the retaining ring 5 b in the engaging body 5 locks the end portion 1 a of the water pipe 1, and the water pipe 1 is connected to the receiving port 3, that is, the joint 2.

  As a second connection method, as shown in FIG. 7, the engagement body 5 and the attachment body 6a are not attached to the receiving port 3 of the joint 2. And in the edge part 1a of the water flow pipe 1, the edge part 1a is previously inserted in the engaging body 5 outside the receiving port 3. FIG. At this time, the locking claw 5d of the retaining ring 5b in the engaging body 5 locks the end portion 1a of the water flow pipe 1, and the engaging body 5 is attached to the end portion 1a. Therefore, the end portion 1a of the water pipe 1 to which the engagement body 5 is attached, that is, the connection end portion 7 is inserted into the receiving port 3 of the joint 2 and the attachment body 6a is attached (see FIGS. 7 and 1). . That is, the connecting end portion 7 formed by attaching the engaging body 5 to the end portion 1a is inserted into the receiving port 3 of the joint 2, and then the engaging body 5 is engaged with the attachment body 6a as the locking means 6. . As a result, the engaging body 5 is prevented from being detached from the receiving port 3 by the attachment body 6 a, and the water conduit 1 is connected to the receiving port 3, that is, the joint 2.

  Thus, in connecting the water pipe 1 to the joint 2, there are two connection methods, the first connection method and the second connection method, so one of these connection methods can be selected depending on the situation. it can. For example, when the joint 2 is in a place where it can be visually recognized or in a place where the water pipe 1 can be easily inserted, the engagement body 5 is accommodated in the receiving port 3 of the joint 2 by selecting the first connection method. In this state, the water pipe 1 can be easily connected to the joint 2 by inserting the water pipe 1 into the receiving port 3. In particular, by selecting the second connection method, that is, before inserting the water conduit 1 into the receiving port 3 of the joint 2, the engaging body 5 is attached to the end portion 1 a of the water conduit 1 beforehand in advance. By attaching, the insertion state of the end part 1a with respect to the engaging body 5 can be grasped. Therefore, by inserting the end portion 1a of the water flow pipe 1 to which such an engagement body 5 is attached, that is, the connection end portion 7 into the receiving port 3 of the joint 2, the joint 2 is difficult to see or is not easily visible. Even when the water pipe 1 is not easily inserted, the water pipe 1 can be reliably connected to the joint 2.

  Furthermore, when attaching the engagement body 5 to the end portion 1 a of the water conduit 1 outside, after inserting the end portion 1 a into the engagement body 5, a force is applied so that the end portion 1 a is pulled back with respect to the engagement body 5. By adding, the locking claw 5d of the retaining ring 5b can be caused to bite into the water pipe 1 (specifically, the end portion 1a). In this state, the water pipe 1 can be connected to the joint 2 more reliably by inserting the end portion 1 a (specifically, the connection end 7) of the water pipe 1 into the receiving port 3.

  On the contrary, in order to remove the water pipe 1 from the joint 2, first, the attachment body 6 a is removed from the receiving port 3 of the joint 2, and the engagement of the attachment body 6 a with the engagement body 5 is released. And the edge part 1a of the water flow pipe 1 is removed from the receptacle 3 of the coupling 2 in the state to which the engaging body 5 was attached, ie, the state of the connection end part 7 (refer FIG. 7). In this way, the water pipe 1 can be removed from the joint 2 together with the engagement body 5. However, the water pipe 1 to which the engagement body 5 is attached can be connected to the joint 2 again by the same method (that is, the first Two connection methods) can be used. In this manner, the water pipe 1 can be removed from the joint 2 in a state where the engaging body 5 is attached, and the water pipe 1 to which the engaging body 5 is attached can be removed in a similar manner (that is, the first It is possible to connect to the joint 2 again using the second connection method). For this reason, for example, even if the water pipe 1 is mistakenly inserted, it is possible to easily perform connection reconnection without the need to replace the joint 2 or to cut the water pipe 1.

  FIG. 8 shows a second embodiment of the present invention. In this embodiment, the core portion 8 is formed integrally with the receiving port 3 and the water stop member 4 is attached to the core portion 8 in the first embodiment. In the following description, parts having the same function are denoted by the same reference numerals, and different parts will be mainly described.

  A core portion 8 is formed in the receiving hole 3b inside the receiving port 3 so as to protrude from the inner side to the mouth side. And the groove | channel 3e in which the water stop member 4 fits is formed in the outer peripheral surface of this core part 8. As shown in FIG. In this way, the water stop member 4 stops water between the core portion 8, that is, the receiving port 3, and the inner peripheral surface of the end portion 1 a of the water pipe 1.

  In the engaging body 5, the cylindrical body 5 f in the engaging body main body 5 a is arranged such that the front piece 5 i prevents the first support ring 5 g from coming off and the front end surface of the end portion 1 a hits. It bends inward and extends.

  The effect of the joint 2 in the second embodiment is the same as that of the first embodiment. However, in the connection end portion 7, the distal end surface of the end portion 1a in the water pipe 1 is the engagement body main body. Since it abuts on 5a (specifically, the front piece 5i of the cylindrical body 5f), the end portion 1a is not inserted into the engaging body 5 beyond a predetermined position.

  In addition, this invention is not necessarily limited to embodiment mentioned above, A various other change is possible. For example, in the joint 2, one end side of the joint main body 2a is the receiving port 3 described above, but the other end side may be provided with a similar receiving port or a receiving port having another structure. 2 may be bent into an L-shape and both ends thereof may be receiving holes, and further, the joint body 2a may be formed to branch to provide three or more receiving holes. Good.

  In addition, the attachment body 6a is attached to the receiving port 3 so that the engaging body 5 into which the end portion 1a of the water flow tube 1 is inserted is attached to the receiving port 3 so as to approach from the side of the water flow tube 1. As long as it is possible and can be removed from the receiving port 3 so as to be separated from the water pipe 1 to the side, the following modification may be adopted.

  As a first modified embodiment, as shown in FIGS. 9 to 10, the receiving hole 3 and the attachment body 6 a form an accommodation hole 3 b that accommodates the end portion 1 a of the water conduit 1 and the engagement body 5. You may do it. That is, a part of the receiving port 3 is notched, and the attachment body 6a is formed so as to fill the notched portion. In the illustrated embodiment, the attachment body 6 a is formed to extend slightly from the semicircle so as to partially cover the engagement body 5. The attachment body 6 a extends forward so that the front side covers the receiving port 3, and is engaged with a recessed portion 3 h provided on the receiving port 3 so as to protrude inward from the extended front end portion. A first engaging portion 6e is provided. The rear end portion of the attachment body 6a is provided with a second engagement portion 6f that protrudes inward and engages with the engagement body 5 (specifically, the rear end of the engagement body 5). The engagement body 5 is prevented from coming off from the receiving port 3 by the second engagement portion 6f. And the attachment body 6a is provided with the engaging claw 6g engaged with the to-be-engaged part 3i provided in the receptacle 3, The attachment body 6a is attached to the receptacle 3 by this engagement claw 6g. Removably attached.

  Moreover, as a 2nd deformation | transformation aspect, as shown in FIGS. 11-12, the attachment body 6a may consist of the two division bodies 6h and 6h of the shape which divided the ring into two. The attachment body 6 a is formed by combining two divided bodies 6 h and 6 h, and a male screw 6 i provided on the outer periphery thereof is screwed into a female screw 3 j provided on the inner periphery of the receiving port 3. Then, it is detachably attached to the receptacle 3.

  In addition, the water receiving member 3 is provided with one water stop member 4 in the first embodiment and two water stop members 4 in the second embodiment, but the number of the water stop members 4 is one. It is not limited to one or two, but may be provided as many as necessary.

It is a longitudinal cross-sectional view of 1st embodiment of this invention. Similarly, it is sectional drawing by the AA in FIG. Similarly, it is a K arrow line view in FIG. Similarly, it is an enlarged vertical sectional view of the engaging body. Similarly, a retaining ring is shown, (a) is an enlarged plan view, and (b) is a sectional view taken along line BB in (a). Similarly, it is a longitudinal sectional view showing a first connection method for connecting a water pipe to a joint. Similarly, it is a longitudinal sectional view showing a second connection method for connecting a water pipe to a joint. It is a longitudinal cross-sectional view of 2nd embodiment of this invention. It is a longitudinal cross-sectional view which shows the 1st modification aspect of this invention. Similarly, it is sectional drawing by CC line in FIG. It is a longitudinal cross-sectional view which shows the 2nd modification of this invention. Similarly, it is sectional drawing by the DD line in FIG. It is a longitudinal cross-sectional view which shows the conventional coupling.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water pipe 1a End part 1b Shaft center 1c End part front part 1d End part rear part 2 Joint 3 Receptacle 3a Control part 4 Water stop member 5 Engagement body 5a Engagement body main body 5b Locking ring 5c Ring main body 5d Locking Claw 5e Axle 6 Locking means 6a Attachment 7 Connection end 8 Core 8a Core member P Connection direction Q Anti-connection direction

Claims (12)

A joint to which a water pipe made of synthetic resin is connected,
A receiving port into which an end portion of the water pipe is inserted in a connecting direction facing one of axial directions of the end portion;
A water stop member for stopping water between the receiving port and the end portion;
An engagement body that can be attached to the receiving port in the connection direction and can be removed in an opposite connection direction opposite to the connection direction, and the end portion is inserted;
An attachment body that is detachably attached to the receiving opening and that engages with the engaging body so that the engaging body is prevented from being detached from the receiving opening;
The engaging body includes a cylindrical engaging body main body that fits outside the end portion, and a retaining ring that is held inside the engaging body main body and through which the end portion passes.
The retaining ring includes a ring body and an elastically deformable locking claw that extends inward from the ring body so as to incline in the connection direction and locks the end portion. Have
The attachment body can be attached to the receiving port so as to approach from the side of the water conduit in a state where the engaging body into which the end portion is inserted is attached to the receiving port. A joint formed so as to be removable from the receiving port so as to be separated from the water pipe sideways.   The joint according to claim 1, wherein the engagement body includes a plurality of the retaining rings in the axial direction of the engagement body main body.   The said water stop member is arrange | positioned in the back | inner side of the said receiving port rather than the said engaging body, and water-stops between the outer peripheral surface of the edge part of the said receiving port and the said water flow pipe. Fittings described in A cylindrical core portion that fits inside the end portion of the water pipe,
The joint according to any one of claims 1 to 3, wherein the core portion is provided at least at a position corresponding to the engaging body. A cylindrical core portion that fits inside the end portion of the water pipe,
The joint according to claim 3, wherein the core portion is provided at least at a position corresponding to the water stop member and the engagement body.   The joint according to any one of claims 1 to 5, wherein the receiving port includes a restricting portion that restricts an end portion of the water pipe from proceeding in the connection direction beyond a predetermined position. In order to connect a water pipe made of synthetic resin to the joint, a connection end inserted into the joint inlet toward the connection direction facing the axial direction of the end part of the water pipe,
The end portion;
The end portion can be attached to the receiving port in the connection direction and can be removed in the opposite connection direction opposite to the connection direction so that the end portion is inserted. An engagement body attached to
The engaging body is engageable with a locking means provided at the receiving port so as to be prevented from coming off from the receiving port; and
The engaging body includes a cylindrical engaging body main body that fits outside the end portion, and a retaining ring that is held inside the engaging body main body and through which the end portion passes.
The retaining ring includes a ring body and an elastically deformable locking claw that extends inward from the ring body so as to incline in the connection direction and locks the end portion. Having a connecting end of a water pipe.   The connection end portion of the water pipe according to claim 7, wherein the engagement body includes a plurality of the retaining rings in the axial direction of the engagement body main body.   9. The through-hole according to claim 7, wherein the engagement body is provided at a rear portion of the end portion, rearward of a front portion of the end portion for allowing the water-stopping member to be in close contact with the outer peripheral surface of the end portion. Connection end of water pipe. A cylindrical core member that fits inside the end portion;
The connecting end portion of the water pipe according to claim 9, wherein the core member is provided at least at a rear portion of the end portion. A cylindrical core member that fits inside the end portion;
The connecting end portion of the water pipe according to claim 9, wherein the core member is provided at least at the end portion front portion and the end portion rear portion.   It is a connection method of a water pipe which connects the connection end part of the water pipe of any one of Claims 7 thru | or 11 to a coupling, Comprising: The said connection end by which the said engaging body is attached to the said edge part part A water pipe connecting method in which a portion is inserted into a receiving port of the joint, and then the locking means is engaged with the engaging body.

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