JP5584583B2

JP5584583B2 - Joint for resin pipe and connection method using joint for resin pipe

Info

Publication number: JP5584583B2
Application number: JP2010233652A
Authority: JP
Inventors: 浩之戸次
Original assignee: Waterworks Technology Development Organization Co Ltd
Current assignee: Waterworks Technology Development Organization Co Ltd
Priority date: 2010-10-18
Filing date: 2010-10-18
Publication date: 2014-09-03
Anticipated expiration: 2030-10-18
Also published as: JP2012087845A

Description

本発明は、樹脂管の接続管部内に管軸芯方向から圧入可能な接続筒部と当該接続筒部よりも大径の連結筒部とを備えた継手本体と、継手本体の接続筒部が圧入された樹脂管の接続管部を径方向外方側から押圧する押圧スリーブとを備え、継手本体の連結筒部と流体配管系統の管部とを連結させる樹脂管用継手及び当該樹脂管用継手を用いた連結方法に関する。 The present invention provides a joint body having a connecting tube portion that can be press-fitted into the connecting tube portion of the resin pipe from the tube axis direction, and a connecting tube portion having a larger diameter than the connecting tube portion, and a connecting tube portion of the joint body. and a pressing sleeve for pressing the connecting tube portion of the indented resin pipe from the radially outer side, the joint body linking tube and the fluid piping system of the pipe section and fitting for plastic pipe fittings, and the resin pipe is connected the It relates to the connection method used .

従来の樹脂管用継手では、例えば、図１２に示すように、樹脂管８０の接続管部８１内に管軸芯Ｘ方向から圧入可能な接続筒部８３と当該接続筒部８３よりも大径の連結筒部８４とを備えた継手本体８２と、継手本体８２の接続筒部８３が圧入された樹脂管８０の接続管部８１を径方向外方側から押圧する押圧スリーブ８５とを備えて構成されている（特許文献１参照）。継手本体８２の接続筒部８３には、樹脂管８０の接続管部８１の内周面８１ａに喰込み可能な複数の抜止め突起８６ａが管軸芯Ｘ方向に間隔をおいて突設された嵌合接続筒部８６を備えている。そして、押圧スリーブ８５が予め外嵌された状態の樹脂管８０内に、樹脂管８０の接続管部８１の端部８１Ａが継手本体８２の連結筒部８４の先端部８４Ａに当接するまで当該継手本体８２の接続筒部８３を圧入し、当該接続筒部８３が圧入された接続管部８１に押圧スリーブ８５を外嵌状態で圧入することで、抜け止め突起８６ａが接続管部８１の内周面８１ａに喰込み、押圧スリーブ８５が接続管部８１の外周面８１ｂから径方向内方側に押圧し、樹脂管８０と継手本体８２とが確実に一体化される。
また、継手本体８２の基端部（連結筒部８４の基端部）には、連結筒部８４よりも径方向外方に突出する連結フランジ８４Ｂが形成され、当該連結フランジ８４Ｂには、ボルト８７を挿通可能な複数のボルト挿通孔８４ａが形成されている。樹脂管８０を接続する対象である流体管（図示せず）には開閉弁Ａが接続され、この開閉弁Ａに分岐管部８８（流体配管系統の管部）が一体形成されており、当該分岐管部８８には連結フランジ８８Ａが形成されている。当該連結フランジ８８Ａには、ボルト８７を挿通可能な複数のボルト挿通孔８８ａが形成されている。従って、継手本体８２に樹脂管８０が接続された状態において、当該継手本体８２の連結筒部８４の連結フランジ８４Ｂに形成された各ボルト挿通孔８４ａを、分岐管部８８の連結フランジ８８Ａに形成された各ボルト挿通孔８８ａに位置合わせして、両ボルト挿通孔８４ａ，８８ａにそれぞれ挿通した複数のボルト８７・ナット８９を締結することにより両連結フランジ８４Ｂ，８８Ａを連結固定することができ、樹脂管８０と分岐管部８８とを連結することが可能となる。 In the conventional joint for resin pipes, for example, as shown in FIG. 12, a connecting cylinder part 83 that can be press-fitted into the connecting pipe part 81 of the resin pipe 80 from the tube axis X direction and a diameter larger than that of the connecting cylinder part 83. A joint body 82 having a connecting tube portion 84 and a pressing sleeve 85 that presses the connection tube portion 81 of the resin tube 80 into which the connection tube portion 83 of the joint body 82 is press-fitted from the radially outer side. (See Patent Document 1). A plurality of retaining protrusions 86 a that can be eaten on the inner peripheral surface 81 a of the connecting pipe portion 81 of the resin pipe 80 are provided on the connecting cylinder portion 83 of the joint body 82 so as to protrude at intervals in the tube axis X direction. The fitting connection cylinder part 86 is provided. Then, in the resin tube 80 in which the pressing sleeve 85 is preliminarily fitted, the joint 81 until the end portion 81A of the connection tube portion 81 of the resin tube 80 abuts on the distal end portion 84A of the connecting tube portion 84 of the joint body 82. The connecting tube portion 83 of the main body 82 is press-fitted, and the pressing sleeve 85 is press-fitted into the connecting tube portion 81 into which the connecting tube portion 83 is press-fitted in an externally fitted state. The pressing sleeve 85 presses into the surface 81a and presses radially outward from the outer peripheral surface 81b of the connecting pipe portion 81, so that the resin pipe 80 and the joint body 82 are reliably integrated.
A coupling flange 84B that protrudes radially outward from the coupling cylinder portion 84 is formed at the proximal end portion of the joint body 82 (the proximal end portion of the coupling cylinder portion 84). The coupling flange 84B includes a bolt. A plurality of bolt insertion holes 84 a into which 87 can be inserted are formed. An on-off valve A is connected to a fluid pipe (not shown) to which the resin pipe 80 is connected, and a branch pipe section 88 (a pipe section of the fluid piping system) is integrally formed on the on-off valve A. A branch flange 88A is formed with a connecting flange 88A. A plurality of bolt insertion holes 88a into which the bolts 87 can be inserted are formed in the connection flange 88A. Therefore, in a state where the resin pipe 80 is connected to the joint body 82, each bolt insertion hole 84a formed in the connection flange 84B of the connection cylinder portion 84 of the joint body 82 is formed in the connection flange 88A of the branch pipe portion 88. The coupling flanges 84B and 88A can be connected and fixed by aligning with the bolt insertion holes 88a and fastening a plurality of bolts 87 and nuts 89 respectively inserted into the bolt insertion holes 84a and 88a. The resin pipe 80 and the branch pipe portion 88 can be connected.

また、基本的な構成は特許文献１に記載の樹脂管用継手と同様であるが、例えば、図１３に示すように、継手本体８２の連結筒部８４の基端部に径方向外方に突出する連結フランジを形成せずに、当該連結筒部８４の基端部に連結筒部８４の先端部８４Ａの外径よりも若干小径の小径部９０を形成する構成を採用することも考えられる。この樹脂管用継手では、当該小径部９０の外周面に外周側ねじ部９０ａが形成される。また、流体配管系統の分岐管部８８に連結フランジを形成せずに、当該分岐管部８８の内周面に内周側ねじ部８８ｂが形成される。そして、継手本体８２に樹脂管８０が接続された状態において、当該継手本体８２の連結筒部８４の小径部９０に形成された外周側ねじ部９０ａを、分岐管部８８の内周側ねじ部８８ｂに螺合させることにより、継手本体８２と分岐管部８８とを連結する。これにより、樹脂管８０と分岐管部８８とを連結することが可能となる。 The basic configuration is the same as that of the joint for resin pipes described in Patent Document 1, but, for example, as shown in FIG. 13, the base end portion of the connecting tube portion 84 of the joint body 82 projects radially outward. It is also conceivable to adopt a configuration in which the small diameter portion 90 having a slightly smaller diameter than the outer diameter of the distal end portion 84A of the connection cylinder portion 84 is formed at the base end portion of the connection cylinder portion 84 without forming the connection flange. In this resin pipe joint, an outer peripheral threaded portion 90 a is formed on the outer peripheral surface of the small diameter portion 90. Further, the inner peripheral side threaded portion 88b is formed on the inner peripheral surface of the branch pipe portion 88 without forming a connecting flange in the branch pipe portion 88 of the fluid piping system. Then, in a state where the resin pipe 80 is connected to the joint main body 82, the outer peripheral side threaded portion 90 a formed in the small diameter portion 90 of the connecting cylinder portion 84 of the joint main body 82 is replaced with the inner peripheral side threaded portion of the branch pipe portion 88. The joint main body 82 and the branch pipe part 88 are connected by screwing to 88b. Thereby, the resin pipe 80 and the branch pipe part 88 can be connected.

特開２００９−３０７６６号公報JP 2009-30766 A

上述のとおり、従来の樹脂管用継手では、例えば、図１２に示すように、継手本体８２と分岐管部８８とを連結する際には、継手本体８２及び分岐管部８８の周方向に複数取付けられたボルト８７・ナット８９を用いて、継手本体８２及び分岐管部８８に形成された両連結フランジ８４Ｂ，８８Ａを連結固定することとなる。
この場合、複数のボルト８７・ナット８９を周方向において略同一の締付け状態で締付けなければ、両連結フランジ８４Ｂ，８８Ａ間に隙間や締付けムラが生じて流体が漏出する虞がある。一方、複数のボルト８７・ナット８９を略同一の締付け状態とすることも可能ではあるが、ボルト８７・ナット８９の数が多い場合等には非常に手間の掛かる作業となり作業効率が低下する。
また、分岐管部８８が開閉弁Ａと近接した状態で配設されている場合等には、当該分岐管部８８よりも上方に突出した開閉弁Ａと、分岐管部８８及び継手本体８２の両連結フランジ８４Ｂ，８８Ａとの間隔が狭くなることがあり、このような場合には、ボルト８７・ナット８９の締結に必要な作業空間が非常に狭くなり締結作業が困難となる。従って、分岐管部８８と継手本体８２との連結作業は、非常に手間が掛かる作業となり作業効率が低下する虞がある。
さらに、複数のボルト８７・ナット８９を用いて両連結フランジ８４Ｂ，８８Ａの連結を行うので、部品点数が多くなりコストが増大することとなる。 As described above, in the conventional joint for resin pipes, for example, as shown in FIG. 12, when connecting the joint main body 82 and the branch pipe portion 88, a plurality of joints are attached in the circumferential direction of the joint main body 82 and the branch pipe portion 88. Both the connecting flanges 84B and 88A formed on the joint main body 82 and the branch pipe portion 88 are connected and fixed using the bolts 87 and nuts 89 thus formed.
In this case, if the plurality of bolts 87 and nuts 89 are not tightened in substantially the same tightening state in the circumferential direction, a gap or tightening unevenness may occur between the coupling flanges 84B and 88A, and the fluid may leak. On the other hand, the plurality of bolts 87 and nuts 89 can be set to substantially the same tightening state, but when the number of the bolts 87 and nuts 89 is large, the work becomes very troublesome and the work efficiency is lowered.
In addition, when the branch pipe portion 88 is disposed in the vicinity of the on-off valve A, the on-off valve A protruding upward from the branch pipe portion 88, the branch pipe portion 88, and the joint body 82 In some cases, the space between the coupling flanges 84B and 88A becomes narrow. In such a case, the working space necessary for fastening the bolt 87 and the nut 89 becomes very narrow, and the fastening work becomes difficult. Therefore, the connecting operation between the branch pipe portion 88 and the joint main body 82 is an extremely time-consuming operation and there is a risk that the working efficiency may be reduced.
Furthermore, since both the connecting flanges 84B and 88A are connected using a plurality of bolts 87 and nuts 89, the number of parts increases and the cost increases.

加えて、従来の樹脂管用継手では、例えば、図１３に示すように、継手本体８２の連結筒部８４の小径部９０に形成された外周側ねじ部９０ａを、分岐管部８８の内周側ねじ部８８ｂに螺合させる際には、固定側である内周側ねじ部８８ｂに対して外周側ねじ部９０ａを回転させる必要がある。この場合、外周側ねじ部９０ａが形成される継手本体８２には長手部材である樹脂管８０が既に圧入されて一体化されているため、外周側ねじ部９０ａを回転させるためには継手本体８２及び樹脂管８０を一体として回転させる必要があり、樹脂管８０及び継手本体８２が分岐管部８８に確実に固定される程度にまで内周側ねじ部８８ｂに対して外周側ねじ部９０ａを螺合させる作業は、非常に手間が掛かり、大掛かりな作業となる虞がある。特に、流体配管系統の分岐管部８８が地下に埋設されている場合には、充分な作業空間を確保するために広範囲に掘削することが必要となり、より手間が掛かり大掛かりな作業となるため、より簡便で容易に継手本体８２と分岐管部８８とを連結できることが望ましい。 In addition, in the conventional joint for resin pipes, for example, as shown in FIG. 13, the outer peripheral side threaded part 90 a formed in the small diameter part 90 of the connecting cylinder part 84 of the joint main body 82 is replaced with the inner peripheral side of the branch pipe part 88. When screwing into the screw portion 88b, it is necessary to rotate the outer peripheral side screw portion 90a with respect to the inner peripheral side screw portion 88b which is the fixed side. In this case, since the resin pipe 80 which is a longitudinal member is already press-fitted and integrated with the joint main body 82 in which the outer peripheral side threaded portion 90a is formed, the joint main body 82 is used to rotate the outer peripheral side threaded portion 90a. And the resin pipe 80 needs to be rotated as a unit, and the outer peripheral side threaded part 90a is screwed to the inner peripheral side threaded part 88b to such an extent that the resin pipe 80 and the joint body 82 are securely fixed to the branch pipe part 88. The work to be combined is very time-consuming and may be a large-scale work. In particular, when the branch pipe portion 88 of the fluid piping system is buried underground, it is necessary to excavate extensively in order to secure a sufficient work space, and it takes more time and labor, and therefore requires a large work. It is desirable that the joint body 82 and the branch pipe portion 88 can be connected more simply and easily.

本発明は、上述の実状に鑑みて為されたものであって、その目的は、樹脂管と流体配管系統の管部との接続を、簡便な構成でありながら、流体の漏出を確実に防止でき、しかも、能率良く容易に行うことのできる樹脂管用継手及び当該樹脂管用継手を用いた連結方法を提供する点にある。 The present invention has been made in view of the above circumstances, and its purpose is to reliably prevent the leakage of fluid while the connection between the resin pipe and the pipe portion of the fluid piping system is simple. In addition, the present invention is to provide a joint for resin pipes that can be efficiently and easily performed and a connecting method using the joint for resin pipes .

本発明による第１の特徴構成は、樹脂管の接続管部内に管軸芯方向から圧入可能な接続筒部と当該接続筒部よりも大径の連結筒部とを備えた継手本体と、前記接続筒部が圧入された前記接続管部を径方向外方側から押圧する押圧スリーブとを備え、前記連結筒部と流体配管系統の管部とを連結させる樹脂管用継手であって、
前記連結筒部の基端部に径方向外方側に突出する連結フランジが一体形成され、
前記連結筒部に外嵌される筒状連結部材を備え、前記筒状連結部材の内周面には前記管部の外周側ねじ部に螺合可能な内周側ねじ部が形成され、かつ、前記筒状連結部材の端部には内周面から径方向内方側に突出する環状突出部が形成されて、前記筒状連結部材の内周側ねじ部を前記管部の外周側ねじ部に螺合させることにより、前記環状突出部を管軸芯方向から前記連結筒部の基端部における前記連結フランジに当接させる押圧状態で、前記連結フランジと前記管部とを連結させる構成で、
前記環状突出部の内径よりも大径で、かつ、前記筒状連結部材の内径よりも小径の突起が、前記連結筒部の先端部における周方向複数箇所に径方向外方側に一体的に突出形成され、
前記環状突出部には、前記連結筒部の先端部に形成された前記複数の突起に対応する箇所に複数の切欠部が形成され、前記継手本体に外嵌させた状態の前記筒状連結部材を管軸芯方向に沿って前記接続筒部側から前記連結筒部側に移動させた場合に、前記筒状連結部材の前記複数の切欠部が前記連結筒部の先端部における前記複数の突起を通過可能に形成されている点にある。 A first characteristic configuration according to the present invention is a joint body including a connecting tube portion that can be press-fitted into the connecting tube portion of the resin tube from the tube axis direction, and a connecting tube portion having a larger diameter than the connecting tube portion, A pressing sleeve that presses the connecting pipe portion into which the connecting cylinder portion is press-fitted from the radially outer side, and a joint for a resin pipe that connects the connecting cylinder portion and the pipe portion of the fluid piping system,
A connecting flange projecting radially outward is integrally formed at the base end portion of the connecting tube portion,
A cylindrical connecting member fitted over the connecting cylindrical portion, and an inner peripheral threaded portion that can be screwed to an outer peripheral threaded portion of the tube portion is formed on the inner peripheral surface of the cylindrical connecting member; An annular projecting portion projecting radially inward from the inner peripheral surface is formed at the end of the cylindrical connecting member, and the inner peripheral side thread portion of the cylindrical connecting member is connected to the outer peripheral side screw of the tube portion. A structure in which the connecting flange and the pipe part are connected in a pressed state in which the annular projecting part is brought into contact with the connecting flange at the base end part of the connecting cylinder part from the pipe axis direction by being screwed to the part. so,
Projections having a diameter larger than the inner diameter of the annular projecting portion and smaller than the inner diameter of the cylindrical connecting member are integrally formed radially outward at a plurality of circumferential positions at the distal end portion of the connecting cylindrical portion. Protruding and formed
In the annular projecting portion, a plurality of cutout portions are formed at positions corresponding to the plurality of protrusions formed at the distal end portion of the connecting cylinder portion, and the cylindrical connecting member is in a state of being externally fitted to the joint body. Are moved from the connecting tube portion side to the connecting tube portion side along the tube axis direction, the plurality of notches of the tubular connecting member are the plurality of protrusions at the tip of the connecting tube portion. It is in the point formed so that passage is possible .

上記特徴構成によれば、樹脂管の接続管部内に接続筒部が圧入され、押圧スリーブが外嵌された継手本体を備え、当該継手本体における連結筒部の基端部に一体形成された連結フランジを流体配管系統の管部に当接或いは近接させた状態で、継手本体の連結筒部に外嵌される筒状連結部材の内周面に形成された内周側ねじ部を管部の外周面に形成された外周側ねじ部に螺合させるように筒状連結部材を回転させることにより、筒状連結部材の環状突出部を管軸芯方向で連結フランジの先端側面に当接させ押圧状態として、さらに、連結フランジの基端側面を管部に当接させることで、継手本体の連結フランジと管部とを連結することができる。これにより、継手本体の連結筒部に外嵌された筒状連結部材のみを回転させて内周側ねじ部と外周側ねじ部とを螺合させるだけで、確実に継手本体の連結フランジと管部とを連結することができる。すなわち、継手本体及び長手部材である樹脂管を回転させずに、筒状連結部材を回転させるだけの非常に簡単で容易な作業により、継手本体と管部とを能率良く連結することができるのである。
また、従来のように、複数のボルト・ナットを用いる必要がなく、筒状連結部材を導入すればよいので、部品点数が少なくなり非常に簡便な構成である。
さらに、筒状連結部材の環状突出部と継手本体の連結フランジとが当接し押圧状態となり、さらには、連結フランジと管部とが当接し押圧状態となるので、連結フランジと管部との間の締付け状態を周方向においてできるだけ均一にし、締付け状態の安定化を図ることができ、流体の漏出を防止することができる。
よって、樹脂管と流体配管系統の管部との接続を、簡便な構成でありながら、流体の漏出を確実に防止でき、しかも、能率良く容易に行うことができる。
加えて、連結筒部の先端部における周方向複数箇所に径方向外方側に突出する突起が一体的に形成されているので、当該突起は、圧入装置による樹脂管に対する継手本体の圧入接続作業時に、樹脂管の接続管部の端面と管軸芯方向から当接して当該接続管部に対する継手本体の接続筒部の最大挿入長さを規制するストッパー機能と、圧入装置による樹脂管に対する押圧スリーブの圧入作業時に、押圧スリーブの端面と管軸芯方向から当接して拡径状態にある接続管部に対する押圧スリーブの最大外嵌長さを規制するストッパー機能とを発揮することができる。
また、連結筒部の先端部における複数の突起は、継手本体に外嵌された状態の筒状連結部材における環状突出部の内径よりも大径で、かつ、筒状連結部材の内径よりも小径に形成されており、しかも、環状突出部には、複数の突起に対応する箇所（管軸芯に対して、
周方向で同一角度となる箇所）に複数の切欠部が形成されている。これにより、筒状連結部材を、樹脂管の圧入前における継手本体の接続筒部側から外嵌し、管軸芯方向に沿って接続筒部側から連結筒部側に移動させた後、連結筒部の先端部に形成された複数の突起に対して複数の切欠部を周方向において同位相となるように回転させることにより、当該複数の切欠部が複数の突起を通過することができ、筒状連結部材の環状突出部を継手本体の連結筒部に外嵌させることができる。
従って、樹脂管や押圧スリーブの圧入接続作業時における最大挿入長さ及び最大外嵌長さを規制する複数の突起を設ける構成としながら、継手本体と管部とを連結する筒状連結部材の環状突出部を継手本体の連結筒部に確実に外嵌して、当該環状突出部と連結フランジとを当接させ押圧状態とすることで、確実に連結フランジと管部とを連結することができる。 According to the above-mentioned characteristic configuration, the connection cylinder part is press-fitted into the connection pipe part of the resin pipe, the coupling main body having the pressing sleeve fitted thereto is provided, and the coupling is integrally formed at the base end portion of the coupling cylinder part in the coupling main body. In a state where the flange is in contact with or close to the pipe part of the fluid piping system, the inner peripheral side threaded part formed on the inner peripheral surface of the cylindrical connecting member fitted on the connecting cylindrical part of the joint body is connected to the pipe part. By rotating the cylindrical connecting member so as to be screwed into the outer peripheral side threaded portion formed on the outer peripheral surface, the annular protruding portion of the cylindrical connecting member is brought into contact with the distal end side surface of the connecting flange in the tube axis direction and pressed. As a state, the connection flange of a joint main body and a pipe part can be further connected by making the base end side of a connection flange contact a pipe part. As a result, only by rotating only the cylindrical connecting member fitted on the connecting cylinder portion of the joint body and screwing the inner peripheral side screw portion and the outer peripheral side screw portion, the connecting flange and pipe of the joint main body can be securely connected. The parts can be connected. That is, it is possible to efficiently connect the joint body and the pipe part by a very simple and easy operation by simply rotating the cylindrical connecting member without rotating the joint body and the resin pipe which is the longitudinal member. is there.
Further, unlike the conventional case, it is not necessary to use a plurality of bolts and nuts, and it is only necessary to introduce a cylindrical connecting member.
Furthermore, since the annular protrusion of the cylindrical connecting member and the connecting flange of the joint body come into contact with each other and are in a pressed state, and further, the connecting flange and the pipe portion come into contact and are in a pressed state. The tightening state can be made as uniform as possible in the circumferential direction, the tightening state can be stabilized, and fluid leakage can be prevented.
Therefore, the connection between the resin pipe and the pipe portion of the fluid piping system can be reliably and easily prevented from leaking the fluid while having a simple configuration.
In addition, since protrusions protruding radially outward are integrally formed at a plurality of circumferential positions at the distal end portion of the connecting cylinder portion, the protrusions are press-fitting and connecting the joint body to the resin pipe by the press-fitting device. Sometimes, a stopper function that restricts the maximum insertion length of the connecting tube portion of the joint body with respect to the end surface of the connecting pipe portion of the resin pipe from the tube axis direction, and a pressing sleeve for the resin pipe by the press-fitting device During the press-in operation, it is possible to exert a stopper function that regulates the maximum outer fitting length of the pressing sleeve with respect to the connecting pipe portion that is in a diameter-expanded state by contacting the end surface of the pressing sleeve from the tube axis direction.
Further, the plurality of protrusions at the distal end portion of the connecting cylinder portion are larger in diameter than the inner diameter of the annular projecting portion in the cylindrical connecting member fitted on the joint body, and smaller in diameter than the inner diameter of the cylindrical connecting member. In addition, the annular protrusion has a portion corresponding to a plurality of protrusions (with respect to the tube axis,
A plurality of notches are formed at a portion having the same angle in the circumferential direction. As a result, the cylindrical connecting member is externally fitted from the connecting tube portion side of the joint body before the resin tube is press-fitted, and moved from the connecting tube portion side to the connecting tube portion side along the tube axis direction, and then connected. By rotating the plurality of notches so as to have the same phase in the circumferential direction with respect to the plurality of protrusions formed at the tip of the cylindrical portion, the plurality of notches can pass through the plurality of protrusions, The annular projecting portion of the cylindrical connecting member can be externally fitted to the connecting cylindrical portion of the joint body.
Accordingly, the annular connecting member for connecting the joint body and the pipe portion is provided with a plurality of protrusions for restricting the maximum insertion length and the maximum outer fitting length during press-fitting connection work of the resin pipe and the pressing sleeve. By securely fitting the projecting portion to the connecting cylinder portion of the joint body and bringing the annular projecting portion and the connecting flange into contact with each other to be in a pressed state, the connecting flange and the pipe portion can be reliably connected. .

本発明による第２の特徴構成は、前記環状突出部と前記連結フランジとの当接が面接触による当接である点にある。 A second characteristic configuration according to the present invention is that the contact between the annular protrusion and the connection flange is contact by surface contact.

上記特徴構成によれば、環状突出部と連結フランジとの当接が面接触による当接であるので、環状突出部により連結フランジをより大きな接触面積で、周方向に押圧ムラが生じないように押圧して、より確実に締付け状態の安定化を図ることができ、環状突出部と連結フランジ間、ひいては、連結フランジと管部間における流体の漏洩をより確実に防止することができる。 According to the above characteristic configuration, since the contact between the annular protrusion and the connecting flange is contact by surface contact, the annular protrusion has a larger contact area so that pressing unevenness does not occur in the circumferential direction. By pressing, it is possible to stabilize the tightening state more reliably, and it is possible to more reliably prevent fluid leakage between the annular projecting portion and the connecting flange, and thus between the connecting flange and the pipe portion.

本発明による第３の特徴構成は、前記複数の突起及び前記複数の切欠部が、それぞれ周方向に等間隔を開けた状態で３箇所以上設けられている点にある。 A third characteristic configuration according to the present invention is that the plurality of protrusions and the plurality of notches are provided at three or more locations in the circumferential direction at equal intervals.

上記特徴構成によれば、複数の突起及び複数の切欠部が、それぞれ周方向に等間隔を開けた状態で３箇所以上設けられているので、圧入装置による樹脂管に対する継手本体や押圧スリーブの圧入接続作業時に、円環状に形成される樹脂管や押圧スリーブの端部が複数の突起に管軸芯方向から当接した場合には、周方向において均等にしかも安定した状態で、接続筒部の最大挿入長さや押圧スリーブの最大外嵌長さを規制するストッパー機能を発揮することができる。 According to the above characteristic configuration, the plurality of protrusions and the plurality of notches are provided at three or more locations at equal intervals in the circumferential direction, so that the joint body and the press sleeve are press-fitted into the resin pipe by the press-fitting device. When the ends of the resin tube and the pressing sleeve formed in an annular shape are in contact with a plurality of protrusions from the tube axis direction during the connection operation, the connection tube portion A stopper function that regulates the maximum insertion length and the maximum external fitting length of the pressing sleeve can be exhibited.

本発明による第４の特徴構成は、前記筒状連結部材の外周面が、横断面視で多角形状の断面を備えて形成される点にある。 The 4th characteristic structure by this invention exists in the point by which the outer peripheral surface of the said cylindrical connection member is provided with the polygonal cross section by a cross-sectional view.

上記特徴構成によれば、筒状連結部材の外周面が、横断面視で多角形状の断面を備えて形成されるので、筒状連結部材の内周側ねじ部を管部の外周側ねじ部に螺合する際に、多角形状に形成された外周面にスパナ等の工具を当て付けて筒状連結部材のみを容易に回転させることができ、能率良く作業を行うことが可能となる。 According to the above characteristic configuration, since the outer peripheral surface of the cylindrical connecting member is formed with a polygonal cross section in a cross-sectional view, the inner peripheral side threaded portion of the cylindrical connecting member is replaced with the outer peripheral side threaded portion of the tube portion. When screwing together, it is possible to easily rotate only the cylindrical connecting member by applying a tool such as a spanner to the outer peripheral surface formed in a polygonal shape, and work can be performed efficiently.

本発明による第５の特徴構成は、前記接続筒部の先端部に、前記接続管部の端部を径方向外方側から挾持固定する圧入装置の管挾持手段の挾持固定作用に連れて縮径変形する前記接続管部の端部側の内周面を受止め可能で、かつ、前記接続管部の内径よりも小なる外径で直管状又は略直管状に形成された装着筒部が形成されている点にある。 According to a fifth characteristic configuration of the present invention, the pipe tube holding means of the press-fitting device that clamps and fixes the end portion of the connection pipe portion from the radially outer side to the distal end portion of the connection tube portion is contracted. A mounting cylinder portion that is capable of receiving the inner peripheral surface on the end portion side of the connection pipe portion that is deformed in diameter and that is formed in a straight tube shape or a substantially straight tube shape with an outer diameter smaller than the inner diameter of the connection tube portion. It is in a formed point.

上記特徴構成によれば、継手本体の接続筒部と樹脂管の接続管部とを圧入接続する際、接続筒部の先端に形成された装着筒部を樹脂管の接続管部に挿入することにより、樹脂管の接続管部に対して継手本体の接続筒部が傾動したり、脱落したりすることを抑制することができる。
しかも、圧入装置の管挾持手段の挾持固定作用に伴う接続管部の端部側での一定以上の縮径変形を抑制して、樹脂管の接続管部に対する継手本体の接続筒部の圧入作業を良好な状態に維持することができるとともに、装着筒部自体が樹脂管の接続管部の内径よりも小なる外径で直管状又は略直管状に形成されているので、これに接する接続管部の端部側も直管状又は略直管状に維持され、接続管部の端部側でのテーパー状の縮径変形に伴う管挾持手段の抜け出し移動を抑制することができる。
従って、継手本体の接続筒部の先端側に装着筒部を形成するだけの合理的な改造をもって、樹脂管に対する継手本体及び圧入装置の装着姿勢を容易に維持することができ、継手本体と樹脂管との接続作業を能率良く容易に行うことができる。 According to the above characteristic configuration, when the connection tube portion of the joint body and the connection tube portion of the resin pipe are press-fitted and connected, the mounting tube portion formed at the tip of the connection tube portion is inserted into the connection tube portion of the resin tube. Thereby, it can suppress that the connection cylinder part of a joint main body tilts with respect to the connection pipe part of a resin pipe, or falls.
Moreover, press fitting work of the connecting tube portion of the joint body to the connecting pipe portion of the resin pipe is suppressed by suppressing deformation of the diameter of the connecting pipe portion beyond a certain level due to the holding and fixing action of the pipe holding means of the press fitting device. Since the mounting cylinder part itself is formed in a straight tube or a substantially straight tube with an outer diameter smaller than the inner diameter of the connecting pipe part of the resin pipe, the connecting pipe in contact with this The end portion side of the portion is also maintained in a straight tube shape or a substantially straight tube shape, so that the tube holding means can be prevented from moving out due to the tapered diameter reduction deformation on the end portion side of the connecting tube portion.
Therefore, the fitting posture of the joint body and the press-fitting device with respect to the resin pipe can be easily maintained with a reasonable modification only by forming the mounting cylinder portion on the distal end side of the connecting cylinder portion of the joint body. Connection work with the pipe can be performed efficiently and easily.

本発明による第６の特徴構成は、前記接続筒部が、当該接続筒部の先端部から基端部に向かう順に、前記装着筒部と、前記接続管部を拡径案内するテーパー状筒部と、前記接続管部の内周面に喰込み可能な複数の抜止め突起を管軸芯方向に間隔をおいて突設してある嵌合接続筒部とを備えて構成されている点にある。 According to a sixth characteristic configuration of the present invention, the connecting tube portion is a tapered tube portion that guides the diameter of the connecting tube portion and the connecting tube portion in order from the distal end portion to the base end portion of the connecting tube portion. And a plurality of retaining protrusions that can bite into the inner peripheral surface of the connection pipe part, and a fitting connection cylinder part that protrudes at intervals in the pipe axis direction. is there.

上記特徴構成によれば、継手本体の接続筒部における装着筒部を樹脂管内に挿入した状態で接続筒部を樹脂管内にさらに圧入すると、装着筒部と嵌合接続筒部との間の領域に形成されたテーパー状筒部により、樹脂管の接続管部をスムーズに拡径変形させながら圧入することができる。
また、樹脂管の接続管部に対して継手本体の接続筒部を圧入し、かつ、この圧入後の接続管部に対して径方向外方側から押圧する押圧スリーブを装着したとき、接続筒部を構成する嵌合接続筒部の抜止め突起が樹脂管の接続管部の内周面に喰い込むから、樹脂管の接続管部と継手本体の接続筒部との離脱を強力に阻止することができる。
本発明による第７の特徴構成は、上記第１〜第６の特徴構成の何れかを備えた樹脂管用継手を用いた連結方法であって、
前記接続筒部に前記筒状連結部材を外嵌し、当該筒状連結部材を管軸芯周りで回転させて前記環状突出部における前記複数の切欠部の周方向での位置を前記複数の突起に対応する位置に位置合わせした後、前記複数の切欠部が前記複数の突起を通過する状態で、前記筒状連結部材を管軸芯方向に沿って前記接続筒部側から前記連結筒部側に移動させ、その後、前記接続管部内に管軸芯方向から前記接続筒部を圧入するとともに、予め前記樹脂管に外装された状態の前記押圧スリーブを前記接続筒部が圧入された前記接続管部に対して管軸芯方向から外嵌状態で圧入し、続いて、前記樹脂管が接続された状態の前記継手本体を管軸芯方向に移動させ、当該継手本体の連結フランジの基端側面をシール材を介装した状態で前記管部の端面に当接させて、前記連結筒部に外嵌された状態の前記筒状連結部材を回転させ、前記筒状連結部材の内周側ねじ部を前記管部の外周側ねじ部に螺合する点にある。 According to the above characteristic configuration, when the connecting tube portion is further press-fitted into the resin tube in a state where the mounting tube portion in the connecting tube portion of the joint body is inserted into the resin tube, the region between the mounting tube portion and the fitting connecting tube portion Due to the tapered cylindrical part formed in the above, the connecting pipe part of the resin pipe can be press-fitted while smoothly expanding and deforming.
In addition, when the connecting tube portion of the joint body is press-fitted into the connecting tube portion of the resin tube and a pressing sleeve that presses the connecting tube portion after the press-fitting from the radially outer side is mounted, the connecting tube Since the retaining protrusion of the fitting connecting cylinder part that forms the part bites into the inner peripheral surface of the connecting pipe part of the resin pipe, it is possible to strongly prevent the connecting pipe part of the resin pipe and the connecting cylinder part of the joint body from being detached. be able to.
A seventh characteristic configuration according to the present invention is a connection method using a joint for resin pipes having any one of the first to sixth characteristic configurations,
The cylindrical connecting member is externally fitted to the connecting cylindrical portion, and the cylindrical connecting member is rotated around a tube axis so that the circumferential positions of the plurality of notches in the annular projecting portion are the plurality of protrusions. The cylindrical connecting member is moved from the connecting tube portion side to the connecting tube portion side along the tube axis direction in a state in which the plurality of cutout portions pass through the plurality of protrusions. And then press-fitting the connecting tube portion into the connecting tube portion from the axial direction of the tube, and the connecting tube portion in which the connecting tube portion is press-fitted in the state where the pressing sleeve is previously sheathed on the resin tube. The joint body in a state where the resin pipe is connected is press-fitted from the pipe axis direction into the pipe axis direction, and then the joint body in a state where the resin pipe is connected is moved in the pipe axis direction, and the proximal side surface of the coupling flange of the joint body In contact with the end face of the pipe part with a sealant interposed Te, the connection tubular part by rotating the tubular connecting member fitted state, there the inner peripheral side screw portion of the tubular coupling member in that screwed to the outer peripheral side threaded portion of the tube portion.

本発明の流体配管系統における樹脂管用継手の半断面側面図Half sectional side view of resin pipe joint in fluid piping system of the present invention （ａ）継手本体のＩＩａ-ＩＩａ線矢視図、（ｂ）継手本体の半断面側面図、（ｃ）継手本体のＩＩｃ-ＩＩｃ線矢視図(A) IIa-IIa arrow view of joint body, (b) Half cross-sectional side view of joint body, (c) IIc-IIc arrow view of joint body （ａ）筒状連結部材のＩＩＩａ-ＩＩＩａ線矢視を含む半断面側面図、（ｂ）筒状連結部材のＩＩＩｂ-ＩＩＩｂ線矢視図(A) Half cross-sectional side view including the IIIa-IIIa line arrow of the cylindrical connecting member, (b) IIIb-IIIb arrow view of the cylindrical connecting member 筒状連結部材の外嵌工程概略図Schematic diagram of outer fitting process of cylindrical connecting member 環状突出部の切欠部が連結筒部の突起を通過する状態を示す拡大側断面図The expanded sectional side view which shows the state which the notch part of a cyclic | annular protrusion part passes through the protrusion of a connection cylinder part. 図５のＶＩ−ＶＩ線矢視における継手本体及び筒状連結部材の横断面図FIG. 5 is a cross-sectional view of the joint body and the cylindrical connecting member as viewed from the direction of the arrow VI-VI 継手本体の圧入工程概略図Schematic diagram of press fitting process of joint body 押圧スリーブの圧入工程概略図Press-fitting process schematic diagram of pressing sleeve 圧入完了時の状態を示す一部側断面図Partial side sectional view showing the state when press-fitting is completed 継手本体の連結フランジを管部に当接させた状態を示す一部側断面図Partial side sectional view showing a state where the connecting flange of the joint body is in contact with the pipe part （ａ）筒状連結部材を回転させる連結工程概略図、（ｂ）継手本体と管部とが連結された状態を示す図(A) Schematic diagram of a connecting process for rotating a cylindrical connecting member, (b) A diagram showing a state in which a joint body and a pipe part are connected. 従来の樹脂管用継手の半断面側面図Half sectional side view of a conventional joint for resin pipes 従来の樹脂管用継手の半断面側面図Half sectional side view of a conventional joint for resin pipes

以下、図１〜図１１に基づいて、まず、流体配管系統の管部６０近傍の構成について説明した後、本発明に係る樹脂管用継手Ｗについて説明する。 Hereinafter, based on FIGS. 1 to 11, first, the configuration in the vicinity of the pipe portion 60 of the fluid piping system will be described, and then the resin pipe joint W according to the present invention will be described.

図１に示すように、鋳鉄管、鋼管、樹脂管等から構成される水道管等の既設の流体管５０（流体配管系統の一例）の外周面５０ａに、流体管５０の流体管軸芯Ｙに対して交差（当該実施形態では直交）する水平又は略水平方向（管軸芯Ｘ方向）に沿って外方に突出する分岐管部５１が一体形成された鋳鉄製の分割管継手５２が配設されている。分割管継手５２は、流体管５０に対して管径方向の外方から外装自在な管周方向で複数に分割（当該実施形態では三分割）された部分円筒状の分割継手体５２Ａ、５２Ｂ、５２Ｃから構成されている。各分割継手体５２Ａ、５２Ｂ、５２Ｃの管周方向両端部には、流体管５０に外装された隣接する分割継手体５２Ａ、５２Ｂ、５２Ｃ同士を締結手段の一例である複数本のボルト５３・ナット５４で脱着自在に固定連結するための連結部５５、５６、５７が一体的に突出形成されている。各分割継手体５２Ａ、５２Ｂ、５２Ｃ同士の隣接間を密閉するとともに、各分割継手体５２Ａ、５２Ｂ、５２Ｃの内周面５２ａ、５２ｂ、５２ｃと流体管５０の外周面５０ａとの間を密封する合成ゴム製でシート状のシール材５８が複数装着されている（当該実施形態では三箇所）。 As shown in FIG. 1, the fluid pipe axis Y of the fluid pipe 50 is formed on the outer peripheral surface 50a of an existing fluid pipe 50 (an example of a fluid piping system) such as a water pipe composed of a cast iron pipe, a steel pipe, a resin pipe or the like. A split pipe joint 52 made of cast iron integrally formed with a branch pipe portion 51 projecting outward along a horizontal or substantially horizontal direction (tube axis X direction) intersecting (orthogonal in the present embodiment) with respect to It is installed. The split pipe joint 52 is divided into a plurality of parts (three parts in this embodiment) in the pipe circumferential direction that can be externally mounted on the fluid pipe 50 from the outside in the pipe diameter direction. 52C. A plurality of bolts 53 and nuts, which are examples of fastening means, are connected to the adjacent split joint bodies 52A, 52B, and 52C covered by the fluid pipe 50 at both ends in the pipe circumferential direction of the split joint bodies 52A, 52B, and 52C. Connection portions 55, 56, and 57 that are fixedly connected to be detachable at 54 are integrally formed to project. The adjacent parts of the split joint bodies 52A, 52B, 52C are sealed, and the inner peripheral surfaces 52a, 52b, 52c of the split joint bodies 52A, 52B, 52C and the outer peripheral face 50a of the fluid pipe 50 are sealed. A plurality of sheet-like sealing materials 58 made of synthetic rubber are mounted (in this embodiment, three locations).

分割管継手５２のうち分割継手体５２Ｃに一体形成された分岐管部５１には開閉弁Ａが取付けられ、当該分岐管部５１内の流体管５０には、開閉弁Ａを介して取付けた穿孔機（図示せず）の回転切削具（図示せず）により、開き操作された開閉弁Ａ及び分岐管部５１内を通して、管軸芯Ｘを軸芯とする円形の分岐口（図示せず）が貫通形成されており、流体管５０内と開閉弁Ａ内とは分岐口を介して連通されている。
開閉弁Ａには、管軸芯Ｘ方向における分岐管部５１と反対側に、当該管軸芯Ｘと同軸の管部６０（流体配管系統の管部の一例）が形成され、管部６０の外周面には、後述する筒状連結部材６に形成された内周側ねじ部６ｂと螺合可能な外周側ねじ部６０ａが形成されている。 The on / off valve A is attached to the branch pipe portion 51 formed integrally with the split joint body 52C of the split pipe joint 52, and the perforation attached to the fluid pipe 50 in the branch pipe portion 51 via the on / off valve A. A circular branch port (not shown) having a tube axis X as an axis through an opening / closing valve A and a branch pipe part 51 opened by a rotary cutting tool (not shown) of a machine (not shown) Is formed through, and the inside of the fluid pipe 50 and the inside of the on-off valve A communicate with each other through a branch port.
On the on-off valve A, a pipe portion 60 (an example of a pipe portion of a fluid piping system) coaxial with the pipe axis X is formed on the opposite side of the branch pipe portion 51 in the tube axis X direction. On the outer peripheral surface, there is formed an outer peripheral side threaded portion 60a that can be screwed with an inner peripheral side threaded portion 6b formed in a cylindrical connecting member 6 described later.

次に、樹脂管用継手Ｗについて説明する。
図１〜図１１（特に、図１〜図３）に示すように、樹脂管用継手Ｗは、ポリエチレン、ポリブデン等の合成樹脂から製作された水道（流体の一例）用の樹脂管１に対する継手である。樹脂管用継手Ｗには、樹脂管１の接続管部１Ａ内に管軸芯Ｘ方向から圧入可能な接続筒部２と当該接続筒部２よりも大径の連結筒部５とを備えた球状黒鉛鋳鉄等の金属製の継手本体Ｂと、この継手本体Ｂの接続筒部２が圧入された樹脂管１の接続管部１Ａを径方向外方側から押圧する球状黒鉛鋳鉄等の金属製の押圧スリーブ３と、継手本体Ｂの連結筒部５に外嵌される球状黒鉛鋳鉄等の金属製の筒状連結部材６とが備えられており、継手本体Ｂの連結筒部５と流体配管系統の管部６０とを連結させることが可能に構成されている。 Next, the joint W for resin pipes is demonstrated.
As shown in FIGS. 1 to 11 (particularly FIGS. 1 to 3), the joint W for resin pipes is a joint to a resin pipe 1 for water supply (an example of a fluid) manufactured from a synthetic resin such as polyethylene and polybutene. is there. The joint W for a resin pipe has a spherical shape provided with a connecting cylinder part 2 that can be press-fitted into the connecting pipe part 1A of the resin pipe 1 from the tube axis X direction and a connecting cylinder part 5 having a diameter larger than that of the connecting cylinder part 2. A metal joint body B such as graphite cast iron and a metal joint body B such as spheroidal graphite cast iron that presses the connection pipe portion 1A of the resin pipe 1 into which the connection tube portion 2 of the joint body B is press-fitted from the radially outer side. A pressing sleeve 3 and a cylindrical connecting member 6 made of metal such as spheroidal graphite cast iron that is externally fitted to the connecting cylinder part 5 of the joint body B are provided. The connecting cylinder part 5 of the joint body B and the fluid piping system It is comprised so that it can connect with the pipe part 60 of this.

継手本体Ｂは、図１、図２に示すように、接続筒部２を備え、これに連続して一体形成された少し大径の連結筒部５の基端部には、他の配管又は流体機器の管部とシート状のシール材７を介して当接して、接合するための径方向外方側に突出する円環状の連結フランジ８が一体形成されるとともに、連結筒部５の先端部（接続筒部２と連結筒部５との境界相当部位）には、径方向外方側に突出する突起９が周方向複数箇所（本実施形態では４箇所）に、それぞれ周方向に等間隔（本実施形態では９０度）を空けた状態で一体形成されている。 As shown in FIGS. 1 and 2, the joint body B includes a connection cylinder portion 2, and a pipe or other pipe or An annular connecting flange 8 is formed integrally with the pipe portion of the fluid device through the sheet-like sealing material 7 and protrudes radially outward for joining, and the tip of the connecting tube portion 5 In the portion (corresponding to the boundary between the connecting tube portion 2 and the connecting tube portion 5), protrusions 9 protruding radially outward are provided at a plurality of circumferential locations (four locations in the present embodiment), respectively in the circumferential direction, etc. They are integrally formed with a gap (90 degrees in this embodiment).

継手本体Ｂの接続筒部２は、接続筒部２の先端部から基端部に向かう順に、装着筒部４と、テーパー状筒部２Ｂと、嵌合接続筒部２Ａとを一体的に備えて構成されている。
嵌合接続筒部２Ａは、接続筒部２の最も基端側に形成され、樹脂管１の接続管部１Ａの内周面１ａに喰込み可能な複数（当該実施形態では４つ）の環状の抜止め突起２ａを管軸芯Ｘ方向に所定間隔をおいて一体的に突設して形成される。なお、当該抜止め突起２ａを設けない構成としてもよく、また抜止め突起２ａを設ける場合でも、その数は任意の数とすることができる。装着筒部４は、接続筒部２の最も先端側に形成され、直管状又は略直管状に形成される。テーパー状筒部２Ｂは、装着筒部４の基端から最前列の抜止め突起２ａの先端となる最大外径位置までの領域において形成され、樹脂管１の接続管部１Ａを拡径案内するように形成される。 The connecting tube portion 2 of the joint body B is integrally provided with a mounting tube portion 4, a tapered tube portion 2B, and a fitting connecting tube portion 2A in the order from the distal end portion to the base end portion of the connecting tube portion 2. Configured.
The fitting connecting cylinder part 2A is formed on the most proximal side of the connecting cylinder part 2, and is a plurality of (four in this embodiment) annular shape that can be eaten into the inner peripheral surface 1a of the connecting pipe part 1A of the resin pipe 1 The retaining protrusions 2a are integrally projected at a predetermined interval in the tube axis X direction. In addition, it is good also as a structure which does not provide the said retaining protrusion 2a, and also when providing the retaining protrusion 2a, the number can be made into arbitrary numbers. The mounting cylinder 4 is formed on the most distal end side of the connection cylinder 2 and is formed in a straight tube shape or a substantially straight tube shape. The tapered cylindrical portion 2B is formed in a region from the base end of the mounting cylindrical portion 4 to the maximum outer diameter position that becomes the distal end of the retaining projection 2a in the foremost row, and guides the diameter of the connecting pipe portion 1A of the resin pipe 1 to expand. Formed as follows.

接続筒部２の嵌合接続筒部２Ａの外径は、圧入前の樹脂管１の接続管部１Ａの内径よりも大径で、かつ、圧入前の樹脂管１の接続管部１Ａの外径よりも小径に構成されている。接続筒部２の装着筒部４は、樹脂管１の接続管部１Ａの端部を径方向外方側から挾持固定する圧入装置（図示せず）の管挾持手段（図示せず）の挾持幅よりも大なる長さを有し、かつ、管挾持手段の挾持固定作用に連れて縮径変形する接続管部１Ａの端部側の内周面１ａを受止め得る範囲において、圧入前の樹脂管１の接続管部１Ａの内径よりも小なる外径に形成されている。 The outer diameter of the fitting connecting tube portion 2A of the connecting tube portion 2 is larger than the inner diameter of the connecting tube portion 1A of the resin tube 1 before press-fitting and is outside the connecting tube portion 1A of the resin tube 1 before press-fitting. The diameter is smaller than the diameter. The mounting tube portion 4 of the connecting tube portion 2 is supported by a tube holding means (not shown) of a press-fitting device (not shown) that holds and fixes the end portion of the connecting tube portion 1A of the resin tube 1 from the radially outer side. As long as it has a length larger than the width and can receive the inner peripheral surface 1a on the end portion side of the connecting pipe portion 1A that is reduced in diameter by the holding and fixing action of the tube holding means, it can be received before press-fitting. The outer diameter is smaller than the inner diameter of the connecting pipe portion 1A of the resin pipe 1.

なお、装着筒部４は、その全長にわたって同一外径となる直管状が好ましく、また、それの外径は、樹脂管１の接続管部１Ａの内径の公差範囲でのバラツキを吸収できる状態で当該接続管部１Ａの内周面１ａとの間に極力微小な環状の隙間が発生するような外径寸法が好ましい。この構成であれば、継手本体Ｂの装着筒部４を樹脂管１の接続管部１Ａ内にスムーズに挿入することができ、しかも、挿入状態では、樹脂管１の接続管部１Ａに対して継手本体Ａの装着筒部４をガタの少ない状態で所定姿勢に安定的に仮保持することができる。 The mounting cylinder 4 is preferably a straight tube having the same outer diameter over its entire length, and the outer diameter of the mounting cylinder 4 is in a state in which variations within the tolerance range of the inner diameter of the connecting pipe 1A of the resin pipe 1 can be absorbed. The outer diameter dimension is preferably such that a minute annular gap is generated as much as possible between the inner peripheral surface 1a of the connecting pipe portion 1A. If it is this structure, the installation cylinder part 4 of the coupling main body B can be smoothly inserted in the connection pipe part 1A of the resin pipe 1, and in addition, with respect to the connection pipe part 1A of the resin pipe 1 in the inserted state. The mounting cylinder portion 4 of the joint body A can be temporarily held stably in a predetermined posture with little play.

連結筒部５の基端部に径方向外方側に突出形成された円環状の連結フランジ８は、後述する筒状連結部材６の環状突出部１０の内径よりも大径で、かつ、筒状連結部材６（内周側ねじ部６ｂ）の内径よりも小径に形成される。
同様に、連結筒部５の先端部に径方向外方側に突出形成された複数の突起９は、筒状連結部材６の環状突出部１０の内径よりも大径で、筒状連結部材６（内周側ねじ部６ｂ）の内径よりも小径に形成される。また、複数の突起９は、後述する押圧スリーブ３の内周面３ａの先端側の端部に形成されたテーパー面３ｂの最大内径よりも大径に形成されている。これにより、複数の突起９は、圧入装置（図示せず）による樹脂管１に対する継手本体Ｂの圧入接続作業時に、樹脂管１の接続管部１Ａの端面と管軸芯Ｘ方向から当接して当該接続管部１Ａに対する接続筒部２の最大挿入長さを規制するストッパー機能と、圧入装置による樹脂管１に対する押圧スリーブ３の圧入作業時に、押圧スリーブ３の端面と管軸芯Ｘ方向から当接して拡径状態にある接続管部１Ａに対する押圧スリーブ３の最大外嵌長さを規制するストッパー機能とを有している。 An annular connecting flange 8 formed to protrude radially outward from the proximal end portion of the connecting cylinder portion 5 is larger in diameter than an inner diameter of an annular protruding portion 10 of a cylindrical connecting member 6 described later, and The connecting member 6 (inner peripheral side threaded portion 6b) is formed with a smaller diameter than the inner diameter.
Similarly, the plurality of protrusions 9 formed to protrude radially outward from the distal end portion of the connecting cylinder portion 5 are larger in diameter than the inner diameter of the annular protruding portion 10 of the cylindrical connecting member 6, and the cylindrical connecting member 6. It is formed with a smaller diameter than the inner diameter of the (inner peripheral side threaded portion 6b). Further, the plurality of protrusions 9 are formed to have a diameter larger than the maximum inner diameter of the tapered surface 3b formed at the end of the inner peripheral surface 3a of the pressing sleeve 3 to be described later. As a result, the plurality of protrusions 9 come into contact with the end surface of the connecting pipe portion 1A of the resin pipe 1 from the tube axis X direction when the joint body B is press-fitted and connected to the resin pipe 1 by a press-fitting device (not shown). A stopper function for restricting the maximum insertion length of the connecting tube portion 2 with respect to the connecting tube portion 1A, and the pressing sleeve 3 from the end surface of the pressing sleeve 3 and the tube axis X direction when the pressing sleeve 3 is pressed into the resin tube 1 by the press-fitting device. It has a stopper function that regulates the maximum outer fitting length of the pressing sleeve 3 with respect to the connecting pipe portion 1A that is in contact with and expanded in diameter.

押圧スリーブ３の内径は、圧入前の樹脂管１の接続管部１Ａの外径よりも大径で、かつ、圧入後の拡径された接続管部１Ａの外径よりも小径に構成されているとともに、この押圧スリーブ３の内周面３ａの両端部のうち、樹脂管１の先端側に位置する端部には、開口側ほど内径が大きくなるテーパー面３ｂが形成され、このテーパー面３ｂの最大外径は、圧入後の拡径された接続管部１Ａの外径よりも大径に構成されている。 The inner diameter of the pressing sleeve 3 is larger than the outer diameter of the connecting pipe portion 1A of the resin pipe 1 before press-fitting and smaller than the outer diameter of the expanded connecting pipe portion 1A after press-fitting. In addition, a taper surface 3b having an inner diameter that increases toward the opening side is formed at the end portion of the inner peripheral surface 3a of the pressing sleeve 3 that is located on the distal end side of the resin tube 1, and this taper surface 3b The maximum outer diameter is configured to be larger than the outer diameter of the expanded connecting pipe portion 1A after press-fitting.

図示しないが、圧入装置は、樹脂管１の接続管部１Ａの端部を径方向外方側から挾持固定する管挾持手段と、継手本体Ｂに形成されている複数の突起９に対して樹脂管１の接続管部１Ａ側に引寄せ可能な状態で係合する継手本体用の係合手段と、押圧スリーブ３における継手本体Ｂから離れる側の端部に係合可能なスリーブ用の係合手段と、管挾持手段と継手本体用の係合手段、又はスリーブ用の係合手段と継手本体用の係合手段を管軸芯Ｘ方向で相対近接移動させる引寄せ手段とが備えられているとともに、管挾持手段とスリーブ用の係合手段とが引寄せ手段に対して択一的に付け替え可能に構成されている。 Although not shown in the drawings, the press-fitting device is made of resin with respect to a plurality of protrusions 9 formed on the pipe body and a pipe holding means for holding and fixing the end of the connecting pipe portion 1A of the resin pipe 1 from the radially outer side. Engagement means for a joint body that engages in a state where it can be pulled toward the connecting pipe portion 1A side of the pipe 1, and engagement for a sleeve that can be engaged with an end of the pressing sleeve 3 on the side away from the joint body B And a pulling means for relatively moving the engagement means for the sleeve and the engagement means for the sleeve and the engagement means for the joint body in the direction of the tube axis X. At the same time, the tube gripping means and the sleeve engaging means can be selectively replaced with respect to the pulling means.

筒状連結部材６は、図３に示すように、内径側に貫通孔（図示せず）を備えた筒状に構成され、横断面視での外周面６ａが、多角形状（本実施形態では、略正八角形状）の断面を備えて形成されるとともに（図３（ｂ）参照）、内周面には、上述の管部６０の外周面に形成された外周側ねじ部６０ａに螺合可能な内周側ねじ部６ｂが形成されている（図３（ａ）参照）。筒状連結部材６の端部（先端部）には、当該筒状連結部材６の内周面から径方向内方側に突出する円環状の環状突出部１０が形成され、当該環状突出部１０には、連結筒部５の先端部に形成された複数の突起９に対応する箇所に複数の切欠部１０Ａ（本実施形態では４つ）が形成されている。 As shown in FIG. 3, the cylindrical connecting member 6 is configured in a cylindrical shape having a through hole (not shown) on the inner diameter side, and the outer peripheral surface 6 a in a cross-sectional view has a polygonal shape (in the present embodiment). (Refer to FIG. 3B), and the inner peripheral surface is screwed to the outer peripheral side threaded portion 60a formed on the outer peripheral surface of the tube portion 60 described above. A possible inner peripheral thread portion 6b is formed (see FIG. 3A). An annular projecting portion 10 that protrudes radially inward from the inner peripheral surface of the tubular connecting member 6 is formed at the end (tip portion) of the tubular connecting member 6. A plurality of cutout portions 10A (four in this embodiment) are formed at locations corresponding to the plurality of protrusions 9 formed at the distal end portion of the connecting cylinder portion 5.

これにより、継手本体Ｂに外嵌させた状態の筒状連結部材６が管軸芯Ｘ方向に沿って接続筒部２側から連結筒部５側に移動された場合に、筒状連結部材６の環状突出部１０の複数の切欠部１０Ａが連結筒部５の先端部における複数の突起９を通過可能に形成されており、筒状連結部材６がさらに連結筒部５の連結フランジ８側に移動された場合には、環状突出部１０が連結フランジ８の先端側面に当接し、当該環状突出部１０（筒状連結部材６）は連結筒部５から離脱しないように構成されている。
すなわち、環状突出部１０の内径は、連結筒部５の外径よりも大径で、かつ、連結フランジ８の外径よりも小径に形成されており、環状突出部１０の切欠部１０Ａの最大内径は、継手本体Ｂの複数の突起９の外径よりも若干大径に形成されている。また、複数の突起９及び複数の切欠部１０Ａは、それぞれ横断面視で略相似形状に形成されており、さらに、それぞれ周方向に等間隔（本実施形態では９０度）を空けた状態で４つずつ配設されている。なお、筒状連結部材６の内周側ねじ部６ｂが形成された箇所と環状突出部１０との角部には、径方向内方側に突出する環状突出部１０の基端側面に当接しない箇所に、継手本体Ｂの連結フランジ８と筒状連結部材６の内周面との間を密封する合成ゴム製のＯリング６ｃが配設されている。 Thereby, when the cylindrical connecting member 6 fitted to the joint main body B is moved from the connecting cylindrical portion 2 side to the connecting cylindrical portion 5 side along the tube axis X direction, the cylindrical connecting member 6 is used. A plurality of notches 10 A of the annular protrusion 10 are formed so as to be able to pass through a plurality of protrusions 9 at the tip of the connecting cylinder part 5, and the cylindrical connecting member 6 is further on the connecting flange 8 side of the connecting cylinder part 5. When moved, the annular projecting portion 10 abuts against the side surface of the connecting flange 8, and the annular projecting portion 10 (cylindrical connecting member 6) is configured not to be detached from the connecting tube portion 5.
That is, the inner diameter of the annular projecting portion 10 is larger than the outer diameter of the connecting cylinder portion 5 and smaller than the outer diameter of the connecting flange 8, and is the maximum of the notch portion 10 A of the annular projecting portion 10. The inner diameter is formed to be slightly larger than the outer diameter of the plurality of protrusions 9 of the joint body B. Further, the plurality of protrusions 9 and the plurality of cutout portions 10A are each formed in a substantially similar shape in a cross-sectional view, and each of the protrusions 9 and the cutout portions 10A is 4 in a state of being spaced at equal intervals (90 degrees in the present embodiment) in the circumferential direction. One by one. It should be noted that the corner of the tubular connecting member 6 where the inner peripheral side threaded portion 6b is formed and the annular projecting portion 10 is in contact with the proximal side surface of the annular projecting portion 10 projecting radially inward. A synthetic rubber O-ring 6 c that seals between the connection flange 8 of the joint body B and the inner peripheral surface of the cylindrical connection member 6 is disposed at a location where the connection is not performed.

次に、上述の如く構成された樹脂管用継手Ｗを用いて、樹脂管１と管部６０とを連結させる連結方法について、図４〜図１１を参照しながら説明する。 Next, a connection method for connecting the resin pipe 1 and the pipe portion 60 using the resin pipe joint W configured as described above will be described with reference to FIGS.

［１］図４に示すように、まず、上述の継手本体Ｂ及び筒状連結部材６を準備し、筒状連結部材６を継手本体Ｂの接続筒部２に外嵌する。そして、筒状連結部材６を管軸芯Ｘ方向に沿って接続筒部２側から連結筒部５側に移動させ、筒状連結部材６の環状突出部１０を連結筒部５の先端部に突出形成された複数の突起９に当接させる。 [1] As shown in FIG. 4, first, the joint body B and the tubular connecting member 6 described above are prepared, and the tubular connecting member 6 is externally fitted to the connecting tube portion 2 of the joint body B. And the cylindrical connection member 6 is moved from the connection cylinder part 2 side to the connection cylinder part 5 side along the pipe-axis X direction, and the annular protrusion part 10 of the cylindrical connection member 6 is made into the front-end | tip part of the connection cylinder part 5. The projections 9 are brought into contact with the plurality of projections 9 formed.

［２］そして、筒状連結部材６を管軸芯Ｘ周りで回転させ、環状突出部１０の複数の切欠部１０Ａの周方向での位置を複数の突起９に対応する位置に位置合わせした後、筒状連結部材６を、さらに管軸芯Ｘ方向に沿って連結フランジ８側に移動させる。ここで、図５及び図６に示すように、複数の切欠部１０Ａと複数の突起９とが管軸芯Ｘ方向で重なった位置に位置する場合でも、複数の切欠部１０Ａの周方向での位置が複数の突起９の周方向での位置に完全に一致した状態とすることができるので、環状突出部１０と複数の突起９とが接触することなく、筒状連結部材６を接続筒部２側から連結筒部５側に確実に移動させることが可能となっている。また、連結筒部５に移動した筒状連結部材６は、当該筒状連結部材６の環状突出部１０が管軸芯Ｘ方向で連結フランジ８の先端側面に当接可能であるので、筒状連結部材６がさらに連結筒部５の連結フランジ８側に移動された場合でも、筒状連結部材６が連結筒部５から離脱せず、外嵌状態を維持可能となっている。 [2] After the cylindrical connecting member 6 is rotated around the tube axis X, the circumferential positions of the plurality of notches 10A of the annular protrusion 10 are aligned with the positions corresponding to the plurality of protrusions 9. The cylindrical connecting member 6 is further moved toward the connecting flange 8 along the tube axis X direction. Here, as shown in FIGS. 5 and 6, even when the plurality of notches 10 A and the plurality of protrusions 9 are located at positions where they overlap each other in the tube axis X direction, Since the position can be made to be completely coincident with the position in the circumferential direction of the plurality of protrusions 9, the tubular connecting member 6 is connected to the connecting tube portion without the annular protrusion 10 and the plurality of protrusions 9 being in contact with each other. It is possible to move reliably from the 2 side to the connecting cylinder part 5 side. Further, the cylindrical connecting member 6 that has moved to the connecting cylindrical portion 5 has a cylindrical shape because the annular protruding portion 10 of the cylindrical connecting member 6 can abut on the tip side surface of the connecting flange 8 in the tube axis X direction. Even when the connecting member 6 is further moved to the connecting flange 8 side of the connecting cylinder portion 5, the cylindrical connecting member 6 is not detached from the connecting cylinder portion 5, and the external fitting state can be maintained.

［３］次に、図７に示すように、押圧スリーブ３を予め樹脂管１における接続管部１Ａ以外の部位に外装したのち、筒状連結部材６が連結筒部５に外嵌された状態の継手本体Ｂにおける装着筒部４を、樹脂管１の接続管部１Ａの端部内に挿入する。そして、樹脂管１の接続管部１Ａの端部に圧入装置（図示せず）の管挾持手段（図示せず）を外装し、樹脂管１の接続管部１Ａの端部を径方向外方側から縮径させながら挾持固定する。また、継手本体Ｂに形成されている突起９に継手本体用の係合手段（図示せず）を係合させ、引寄せ手段（図示せず）により管挾持手段と継手本体用の係合手段を管軸芯Ｘ方向で相対近接移動させて、継手本体Ｂを樹脂管１の接続管部１Ａ側に引寄せ、当該接続管部１Ａに対して既に挿入されている装着筒部４に引き続いて接続筒部２を管軸芯Ｘ方向から圧入する。この際には、装着筒部４と嵌合接続筒部２Ａとの間の領域に形成されたテーパー状筒部２Ｂにより、樹脂管１の接続管部１Ａをスムーズに拡径変形させながら圧入できる。なお、樹脂管１の接続管部１Ａの端部は、継手本体Ｂの連結筒部５の複数の突起９に当接するまで圧入される。 [3] Next, as shown in FIG. 7, after the pressing sleeve 3 is pre-packaged on a portion of the resin pipe 1 other than the connecting pipe portion 1 A, the cylindrical connecting member 6 is externally fitted to the connecting cylindrical portion 5. The fitting cylinder portion 4 of the joint body B is inserted into the end portion of the connecting tube portion 1A of the resin tube 1. Then, a pipe holding means (not shown) of a press-fitting device (not shown) is sheathed at the end of the connecting pipe 1A of the resin pipe 1, and the end of the connecting pipe 1A of the resin pipe 1 is radially outward. Clamp and fix while reducing the diameter from the side. Further, the engagement means (not shown) for the joint body is engaged with the protrusion 9 formed on the joint body B, and the pipe holding means and the engagement means for the joint body are brought together by the drawing means (not shown). Are moved relatively close to each other in the direction of the tube axis X, and the joint body B is drawn toward the connecting tube portion 1A side of the resin tube 1, and subsequently to the mounting tube portion 4 already inserted into the connecting tube portion 1A. The connecting tube portion 2 is press-fitted from the tube axis X direction. At this time, the connecting tube portion 1A of the resin tube 1 can be press-fitted while smoothly expanding and deforming by the tapered tube portion 2B formed in the region between the mounting tube portion 4 and the fitting connection tube portion 2A. . The end portion of the connecting pipe portion 1A of the resin pipe 1 is press-fitted until it comes into contact with the plurality of protrusions 9 of the connecting cylinder portion 5 of the joint body B.

［４］図８に示すように、樹脂管１の端部に挾持固定されていた管挾持手段を撤去したのち、押圧スリーブ３に、スリーブ用の係合手段（図示せず）を、押圧スリーブ３における継手本体Ｂから離れる側の端部（端面）当て付けた状態で外装させ、引寄せ手段（図示せず）によりスリーブ用の係合手段と継手本体用の係合手段を管軸芯Ｘ方向で相対近接移動させて、圧入後の樹脂管１の接続管部１Ａに対して押圧スリーブ３を管軸芯Ｘ方向から外嵌状態で圧入する。この際には、接続筒部２を構成する嵌合接続筒部２Ａの抜止め突起２ａが樹脂管１の接続管部１Ａの内周面１ａに喰い込むから、樹脂管１の接続管部１Ａと継手本体Ｂの接続筒部２との離脱を強力に阻止できる。なお、押圧スリーブ３の端部は、継手本体Ｂの連結筒部５の複数の突起９に当接するまで圧入される。その後、スリーブ用の係合手段、継手本体用の係合手段及び引寄せ手段を撤去する。 [4] As shown in FIG. 8, after removing the tube holding means held and fixed to the end of the resin tube 1, an engaging means (not shown) for the sleeve is attached to the pressing sleeve 3. 3 and the outer end of the joint body B on the side away from the joint main body B (end face) is applied, and the engaging means for the sleeve and the engaging means for the joint main body are connected to the tube axis X by the drawing means (not shown). The pressing sleeve 3 is press-fitted in an externally fitted state from the tube axis X direction to the connecting pipe portion 1A of the resin pipe 1 after press-fitting. At this time, since the retaining protrusion 2a of the fitting connecting tube portion 2A constituting the connecting tube portion 2 bites into the inner peripheral surface 1a of the connecting tube portion 1A of the resin tube 1, the connecting tube portion 1A of the resin tube 1 is used. And the connection cylinder part 2 of the joint body B can be strongly prevented. The end portion of the pressing sleeve 3 is press-fitted until it comes into contact with the plurality of protrusions 9 of the connecting tube portion 5 of the joint body B. Thereafter, the engaging means for the sleeve, the engaging means for the joint body, and the pulling means are removed.

これにより、図９に示すように、樹脂管１の接続管部１Ａ内に継手本体Ｂの接続筒部２が圧入され、接続筒部２が圧入された接続管部１Ａに押圧スリーブ３を外嵌した状態で、しかも、継手本体Ｂに連結筒部５に筒状連結部材６を外嵌した状態で、継手本体Ｂと樹脂管１とを確実に接続した状態とすることができる。 As a result, as shown in FIG. 9, the connecting tube portion 2 of the joint body B is press-fitted into the connecting tube portion 1A of the resin tube 1, and the pressing sleeve 3 is removed from the connecting tube portion 1A into which the connecting tube portion 2 is press-fitted. The fitting main body B and the resin pipe 1 can be reliably connected in a state where the fitting main body B is fitted and the tubular connecting member 6 is externally fitted to the coupling main body B.

［５］次に、図１０に示すように、樹脂管１が接続された状態の継手本体Ｂを管軸芯Ｘ方向に移動させ、継手本体Ｂの連結フランジ８の基端側面を、シール材７を介装した状態で開閉弁Ａの管部６０の端面に当接させる。なお、この状態では、筒状連結部材６は、継手本体Ｂの連結筒部５に外嵌された状態である。 [5] Next, as shown in FIG. 10, the joint body B with the resin pipe 1 connected is moved in the direction of the tube axis X, and the base end side surface of the connecting flange 8 of the joint body B is attached to the sealing material. 7 is placed in contact with the end face of the pipe portion 60 of the on-off valve A. In this state, the cylindrical connecting member 6 is in a state of being externally fitted to the connecting cylinder portion 5 of the joint body B.

［６］そして、図１１（ａ）に示すように、継手本体Ｂの連結筒部５に外嵌された状態の筒状連結部材６を、例えば、当該筒状連結部材６の外周面６ａにスパナ等の工具を当て付けて回転させ、筒状連結部材６の内周側ねじ部６ｂを管部６０の外周側ねじ部６０ａに螺合する。この際には、筒状連結部材６の環状突出部１０が管軸芯Ｘ方向から連結フランジ８の先端側面に当接し押圧状態となり、連結フランジ８の基端側面が管部６０に当接して押圧状態となるまで、所定の締付けトルクで内周側ねじ部６ｂを外周側ねじ部６０ａに螺合させる。 [6] Then, as shown in FIG. 11A, the cylindrical connecting member 6 that is externally fitted to the connecting cylindrical portion 5 of the joint body B is, for example, the outer peripheral surface 6 a of the cylindrical connecting member 6. A tool such as a spanner is applied and rotated so that the inner peripheral side threaded portion 6 b of the cylindrical connecting member 6 is screwed into the outer peripheral side threaded portion 60 a of the tube portion 60. At this time, the annular projecting portion 10 of the tubular connecting member 6 comes into contact with the distal end side surface of the connecting flange 8 from the tube axis X direction to be in a pressed state, and the proximal end side surface of the connecting flange 8 contacts the tube portion 60. The inner thread portion 6b is screwed into the outer thread portion 60a with a predetermined tightening torque until the pressing state is reached.

これにより、継手本体Ｂの連結筒部５に外嵌された筒状連結部材６のみを回転させて内周側ねじ部６ｂと外周側ねじ部６０ａとを螺合させるだけで、確実に継手本体Ｂの連結フランジ８と管部６０とを連結することができる。すなわち、継手本体Ｂ及び長手部材である樹脂管１を回転させずに、筒状連結部材６を回転させるだけの非常に簡単で容易な作業により、継手本体Ｂと管部６０とを能率良く連結することができる。また、筒状連結部材６の環状突出部１０と継手本体Ｂの円環状の連結フランジ８とが面接触で当接し押圧状態となり、さらには、連結フランジ８と管部６０とが面接触で当接し押圧状態となるので、大きな接触面積で周方向に押圧ムラが生じないように押圧して、連結フランジ８と管部６０との間の締付け状態を周方向においてできるだけ均一にし、より確実に締付け状態の安定化を図ることができ、環状突出部１０と連結フランジ８との間、ひいては、連結フランジ８と管部６０との間における流体の漏洩をより確実に防止することができる。 As a result, the joint body can be surely secured by rotating only the cylindrical connecting member 6 fitted on the connecting cylinder portion 5 of the joint body B and screwing the inner peripheral side screw portion 6b and the outer peripheral side screw portion 60a. The connection flange 8 of B and the pipe part 60 can be connected. That is, the joint main body B and the pipe portion 60 are efficiently connected by a very simple and easy operation of rotating the tubular connecting member 6 without rotating the joint main body B and the resin pipe 1 which is a longitudinal member. can do. In addition, the annular projecting portion 10 of the cylindrical connecting member 6 and the annular connecting flange 8 of the joint body B come into contact with each other in a surface contact state, and further, the connecting flange 8 and the pipe portion 60 are in contact with each other by surface contact. Since it is in a contact and pressed state, it is pressed so as not to cause uneven pressure in the circumferential direction with a large contact area, and the tightening state between the connecting flange 8 and the tube portion 60 is made as uniform as possible in the circumferential direction, and tightened more securely. The state can be stabilized, and fluid leakage between the annular projecting portion 10 and the connecting flange 8 and thus between the connecting flange 8 and the pipe portion 60 can be more reliably prevented.

よって、本発明の樹脂管用継手Ｗによれば、樹脂管１と流体配管系統の管部６０との接続を、簡便な構成でありながら、流体の漏出を確実に防止でき、しかも、能率良く容易に行うことができる。 Therefore, according to the joint W for resin pipes of the present invention, the connection between the resin pipe 1 and the pipe portion 60 of the fluid piping system can be reliably prevented from leaking fluid while being simple in structure, and can be easily performed efficiently. Can be done.

〔別実施形態〕
（１）上述の実施形態では、圧入後の樹脂管１の接続管部１Ａに対して押圧スリーブ３を管軸芯Ｘ方向から外嵌状態で圧入したが、この押圧スリーブ３を、周方向で複数に分割された分割スリーブ体と、この複数の分割スリーブ体を縮径側に締付け連結する連結手段から構成して、前記連結手段の締付け操作に伴う複数の分割スリーブ体を縮径移動により、圧入後の接続管部１Ａに対して径方向外方側から押圧するように構成してもよい。 [Another embodiment]
( 1 ) In the above-described embodiment, the pressing sleeve 3 is press-fitted from the tube axis X direction into the connecting tube portion 1A of the resin tube 1 after press-fitting, but this pressing sleeve 3 is inserted in the circumferential direction. A split sleeve body divided into a plurality of parts and a connecting means for tightening and connecting the plurality of split sleeve bodies to the reduced diameter side, and a plurality of the divided sleeve bodies accompanying the tightening operation of the connecting means are moved by reducing the diameter. You may comprise so that it may press from the radial direction outer side with respect to 1 A of connecting pipe parts after press injection.

（２）上述の実施形態では、複数の突起９及び複数の切欠部１０Ａを周方向で等間隔に４つ設けたが、筒状連結部材６が継手本体Ｂに外嵌された状態で、管軸芯Ｘ方向で接続筒部２側から連結筒部５側に移動させた場合に、環状突出部１０の複数の切欠部１０Ａが連結筒部５の複数の突起９を通過可能な構成であれば、その数、周方向における配置、形状等については、特に制限なく採用することができる。 ( 2 ) In the above-described embodiment, the plurality of protrusions 9 and the plurality of cutout portions 10A are provided at equal intervals in the circumferential direction. However, in the state where the cylindrical connecting member 6 is externally fitted to the joint body B, When the plurality of notches 10 A of the annular projecting portion 10 can pass through the plurality of protrusions 9 of the connecting tube portion 5 when moved from the connecting tube portion 2 side to the connecting tube portion 5 side in the axis X direction. For example, the number, the arrangement in the circumferential direction, the shape, and the like can be employed without any particular limitation.

（３）上述の実施形態では、樹脂管１を連結する対象（継手本体Ｂの連結フランジ８を連結する対象）である流体配管系統の管部として、流体管５０から分岐された分岐管部５１を一端側に備えた開閉弁Ａにおいて、当該開閉弁Ａの他端側に形成された管部６０を例示して説明した。すなわち、開閉弁Ａを閉止した状態としておけば流体管５０を不断流状態で、樹脂管１との連結を行うことができる構成について説明した。しかしながら、樹脂管１を連結する対象である流体配管系統の管部としては、上記管部６０に限られるものではなく、例えば、開閉弁を備えない流体配管系統の管部に断水状態で樹脂管１を連結する場合等、種々の管部を対象とすることができる。 ( 3 ) In the above-described embodiment, the branch pipe part 51 branched from the fluid pipe 50 is used as a pipe part of the fluid piping system that is a target to which the resin pipe 1 is connected (a target to which the connection flange 8 of the joint body B is connected). In the on-off valve A provided with one end side, the pipe portion 60 formed on the other end side of the on-off valve A has been described as an example. That is, the configuration has been described in which the fluid pipe 50 can be connected to the resin pipe 1 in an uninterrupted state if the on-off valve A is closed. However, the pipe part of the fluid piping system to which the resin pipe 1 is connected is not limited to the pipe part 60. For example, the resin pipe in a water-stopped state in the pipe part of the fluid piping system that does not include an on-off valve. Various pipe parts, such as when connecting 1, can be targeted.

本発明は、樹脂管と流体配管系統の管部との接続を、簡便な構成でありながら、流体の漏出を確実に防止でき、しかも、能率良く容易に行うことのできる樹脂管用継手として良好に利用することができる。 The present invention is a good joint for a resin pipe that can reliably prevent leakage of fluid while having a simple configuration and connecting the resin pipe to the pipe portion of the fluid piping system, and that can be performed efficiently and easily. Can be used.

Ｂ継手本体
Ｘ管軸芯
Ｗ樹脂管用継手
１樹脂管
１Ａ接続管部（樹脂管）
１ａ内周面
２接続筒部（継手本体）
２Ａ嵌合接続筒部（接続筒部）
２Ｂテーパー状筒部（接続筒部）
２ａ抜止め突起
３押圧スリーブ
３ａ内周面
３ｂテーパー面
４装着筒部（接続筒部）
５連結筒部（継手本体）
６筒状連結部材
６ａ外周面
６ｂ内周側ねじ部（内周面）
８連結フランジ（連結筒部）
９突起
１０環状突出部（筒状連結部材）
１０Ａ切欠部（環状突出部）
５０流体管（流体配管系統）
６０管部（流体配管系統の管部）
６０ａ外周側ねじ部（外周面） B Joint body X Pipe core W Resin pipe joint 1 Resin pipe 1A Connecting pipe (resin pipe)
1a Inner peripheral surface 2 Connection cylinder (joint body)
2A Fitting connection cylinder (connection cylinder)
2B Tapered tube (connecting tube)
2a Locking projection 3 Pressing sleeve 3a Inner peripheral surface 3b Tapered surface 4 Attaching cylinder part (connection cylinder part)
5 Connecting cylinder (joint body)
6 cylindrical connecting member 6a outer peripheral surface 6b inner peripheral side threaded portion (inner peripheral surface)
8 Connection flange (connection cylinder)
9 Protrusion 10 Annular protrusion
10A Notch (annular protrusion)
50 Fluid pipe (fluid piping system)
60 Pipe (Fluid piping system pipe)
60a Outer peripheral side thread (outer peripheral surface)

Claims

A joint body provided with a connecting tube portion that can be press-fitted into the connecting tube portion of the resin tube from the tube axis direction, and a connecting tube portion having a larger diameter than the connecting tube portion, and the connecting tube in which the connecting tube portion is press-fitted A pressing sleeve that presses the portion from the radially outer side, and a joint for a resin pipe that connects the connecting cylinder portion and the pipe portion of the fluid piping system,
A connecting flange projecting radially outward is integrally formed at the base end portion of the connecting tube portion,
A cylindrical connecting member fitted over the connecting cylindrical portion, and an inner peripheral threaded portion that can be screwed to an outer peripheral threaded portion of the tube portion is formed on the inner peripheral surface of the cylindrical connecting member; An annular projecting portion projecting radially inward from the inner peripheral surface is formed at the end of the cylindrical connecting member, and the inner peripheral side thread portion of the cylindrical connecting member is connected to the outer peripheral side screw of the tube portion. A structure in which the connecting flange and the pipe part are connected in a pressed state in which the annular projecting part is brought into contact with the connecting flange at the base end part of the connecting cylinder part from the pipe axis direction by being screwed to the part. so,
Projections having a diameter larger than the inner diameter of the annular projecting portion and smaller than the inner diameter of the cylindrical connecting member are integrally formed radially outward at a plurality of circumferential positions at the distal end portion of the connecting cylindrical portion. Protruding and formed
In the annular projecting portion, a plurality of cutout portions are formed at positions corresponding to the plurality of protrusions formed at the distal end portion of the connecting cylinder portion, and the cylindrical connecting member is in a state of being externally fitted to the joint body. Are moved from the connecting tube portion side to the connecting tube portion side along the tube axis direction, the plurality of notches of the tubular connecting member are the plurality of protrusions at the tip of the connecting tube portion. A joint for resin pipes formed so that it can pass through .

The joint for resin pipes according to claim 1 in which contact of said annular projection and said connection flange is contact by surface contact.

The joint for resin pipes according to claim 1 or 2 , wherein the plurality of protrusions and the plurality of notches are provided at three or more locations at equal intervals in the circumferential direction.

The joint for resin pipes as described in any one of Claims 1-3 in which the outer peripheral surface of the said cylindrical connection member is provided with a polygonal cross section by a cross sectional view.

The end portion of the connecting tube portion that is reduced in diameter by the holding and fixing action of the tube holding means of the press-fitting device that holds and fixes the end portion of the connecting tube portion from the radially outer side to the distal end portion of the connecting tube portion. It can receiving the inner circumferential surface of the side, and, according to claim 1-4 in which the hollow mounting portion formed in a straight tubular or substantially straight tube with an outer diameter made smaller than the inner diameter of the connecting pipe portion is formed The joint for resin pipes as described in any one.

In order from the distal end portion to the proximal end portion of the connection tube portion, the connection tube portion, the tapered tube portion that guides the diameter of the connection tube portion, and the inner peripheral surface of the connection tube portion The joint for resin pipes according to claim 5 , comprising a plurality of retaining protrusions that can bite into the tube and a fitting connection cylinder portion projecting at intervals in the tube axis direction.

It is the connection method using the joint for resin pipes as described in any one of Claims 1-6,
The cylindrical connecting member is externally fitted to the connecting cylindrical portion, and the cylindrical connecting member is rotated around a tube axis so that the circumferential positions of the plurality of notches in the annular projecting portion are the plurality of protrusions. The cylindrical connecting member is moved from the connecting tube portion side to the connecting tube portion side along the tube axis direction in a state in which the plurality of cutout portions pass through the plurality of protrusions. And then press-fitting the connecting tube portion into the connecting tube portion from the axial direction of the tube, and the connecting tube portion in which the connecting tube portion is press-fitted in the state where the pressing sleeve is previously sheathed on the resin tube. The joint body in a state where the resin pipe is connected is press-fitted from the pipe axis direction into the pipe axis direction, and then the joint body in a state where the resin pipe is connected is moved in the pipe axis direction, and the proximal side surface of the coupling flange of the joint body In contact with the end face of the pipe part with a sealant interposed A joint for a resin tube, wherein the tubular connecting member externally fitted to the connecting tubular portion is rotated, and the inner peripheral side threaded portion of the tubular connecting member is screwed to the outer peripheral side threaded portion of the tubular portion. Linking method using