JP5269178B2 - How to assemble pipe fittings - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint that can easily and quickly connect a resin short pipe to a joint body in a come-off preventive state without using a nut (pressing ring) such as a convenience pipe joint. <P>SOLUTION: The pipe joint has the joint body 1 having a socket 4 and the resin short pipe 2 inserted into the socket 4 of the joint body 1. An annular and inward claw 6 having a taper 6a narrowed toward the axial direction is formed at the internal periphery of the socket 4. An annular diameter-expandable/contractible deformable outward claw 8 having a taper 8a which is locked to the inward claw 6 in a come-off preventive state and narrowed toward the tip is formed at the outer periphery of the insertion side of the resin short pipe 2. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

本発明は、給水・給湯、冷温水、冷却水などの配管に用いられ、それら配管の一端部を給水栓等の器具に接続するのに用いられる管継手の組立て方法に関する。   The present invention relates to a method of assembling a pipe joint used for piping such as water / hot water supply, cold / hot water, and cooling water, and connecting one end of the piping to an instrument such as a water tap.

給水・給湯等の配管に用いられる管継手として、例えば、図４に示すような管継手が提案されている（例えば、特許文献１参照。）。この管継手は、給水栓等の器具に接続可能でかつ一端に受口部２０を開口した継手本体２１と、継手本体２１の受口部２０に挿入される樹脂製短管（特許文献１では「ソケット」と称す。）２２と、継手本体２１の受口部２０の外周に設けられた雄ねじ２３に螺合されるナット（押輪）２４と、受口部２０の開口端内周と樹脂製短管２２の外周との間に介在されるワッシャ２５、Ｏリング２６、環状リーフ２７とを備える。   As a pipe joint used for piping such as water supply and hot water supply, for example, a pipe joint as shown in FIG. 4 has been proposed (see, for example, Patent Document 1). This pipe joint includes a joint body 21 that can be connected to an instrument such as a water tap and has an opening 20 at one end, and a resin short pipe that is inserted into the opening 20 of the joint body 21 (in Patent Document 1). (Referred to as a “socket”) 22, a nut (push wheel) 24 screwed into a male screw 23 provided on the outer periphery of the receiving portion 20 of the joint body 21, an inner periphery of the opening end of the receiving portion 20, and resin A washer 25, an O-ring 26, and an annular leaf 27 are provided between the short pipe 22 and the outer periphery.

この管継手の現場施工に際しては、先ず、継手本体２１を給水栓等器具に接続する一方、樹脂製短管２２にワッシャ２５、Ｏリング２６、環状リーフ２７、更にはナット２４をこの順で挿入しておき、樹脂製短管２２に給水管Ｐを挿入して接着接合したうえで、樹脂製短管２２をこの挿入側先端が継手本体２１の受口部２０に該受口部２０内のストッパーリブ２８に当接するまで挿入するとともに、ナット２４を継手本体２１に締付けるというものである。   When constructing the pipe joint in the field, first, the joint body 21 is connected to an appliance such as a water faucet, and a washer 25, an O-ring 26, an annular leaf 27, and a nut 24 are inserted into the resin short pipe 22 in this order. In addition, after the water supply pipe P is inserted into the resin short pipe 22 and bonded and joined, the resin short pipe 22 is inserted into the receiving portion 20 of the joint body 21 at the insertion side end. The nut 24 is inserted until it comes into contact with the stopper rib 28, and the nut 24 is fastened to the joint body 21.

特開２００３−２２７５８９号公報JP 2003-227589 A

しかしながら、上記管継手では、現場での施工終了後に、ナット２４の締付け不足を確認し難いという締付け管理面での問題がある。このため、振動や外部からの荷重等によりナット２４の締付けが緩むと、給水管Ｐ内の水が漏洩する可能性がある。また、ナット２４を継手本体２１に対し締付ける構造上、呼び径が小口径でも、継手本体２１の外周及びナット２４の外周に六角形や八角形など多角形の工具掛け部２１ａ、２４ａを形成しておく必要があるため、その分だけ継手本体２１及びナット２４が大きくなり、継手全体の材料コストアップ、大型化を招き、重量的にも重くなるという難点があった。   However, the above-described pipe joint has a problem in tightening management in that it is difficult to confirm the shortage of tightening of the nut 24 after completion of construction on site. For this reason, when the tightening of the nut 24 is loosened due to vibration, an external load, or the like, water in the water supply pipe P may leak. In addition, due to the structure in which the nut 24 is tightened to the joint body 21, polygonal tool hooks 21 a and 24 a such as hexagons and octagons are formed on the outer periphery of the joint body 21 and the outer periphery of the nut 24 even if the nominal diameter is small. Therefore, the joint main body 21 and the nut 24 are increased by that amount, leading to an increase in material cost and an increase in the size of the joint as a whole, resulting in a heavy weight.

本発明はこのような問題を解決するためになされたものであり、その目的とするところは、前述した従来の管継手のようなナット（押輪）の使用を省略化することでコスト低減、小型化、コンパクト化を図り得、またナットの締付け作業の省略化により組立て作業性の向上を図れ、しかも施工後のナットの緩み問題も解消できて水漏れ事故の発生を確実に防止できて信頼性の高い管継手の組立て方法を提供することにある。   The present invention has been made to solve such problems, and the object of the present invention is to reduce the cost and size by omitting the use of a nut (push wheel) like the conventional pipe joint described above. The assembly workability can be improved by eliminating the tightening work of the nut, and the problem of loosening of the nut after installation can be solved, and the occurrence of water leakage accidents can be surely prevented and reliability is improved. An object of the present invention is to provide a method for assembling a pipe joint having a high height.

本発明の管継手の組立て方法は、請求項１に記載のように、少なくとも一端に受口部を有する継手本体と、この継手本体の前記受口部に挿入可能とする樹脂製短管とを備えている管継手の組立て方法において、前記継手本体は、前記受口部の内周に、軸方向内方に向かって窄まり状のテーパと軸方向に対し直角の垂直部とを有する環状の内向き爪部が設けられており、前記樹脂製短管は、前記受口部内への挿入側部の外周に、先窄まり状のテーパと軸方向に対し直角の垂直部とを有し、前記内向き爪部に抜止め状に係合され拡縮径変形可能な環状の外向き爪部が設けられており、前記継手本体および前記樹脂製短管のいずれか一方を、他方の前記挿入側部および前記受口部のいずれかに圧入し、その圧入に伴い、前記樹脂製短管の前記外向き爪部は、該先窄まり状のテーパを前記継手本体内の前記内向き爪部のテーパに摺接し、該内向き爪部で縮径されながら該内向き爪部を乗り越えて前記外向き爪部の弾性復元作用により、該内向き爪部の垂直部に前記外向き爪部の垂直部を互いに対向させるように係合し、しかる後、前記樹脂製短管の後端開口部から前記樹脂製短管内にインコアを挿入し、該インコアが前記樹脂製短管の挿入側部の内周に嵌合することを特徴を有するものである。
このような構成によれば、樹脂製短管を継手本体の受口部に圧入するだけで内向き爪部と外向き爪部とが互いに抜止め状に係合するため、樹脂製短管を継手本体に抜止め状に簡易迅速に接続することができる。
また、前記樹脂製短管の挿入側部の内周にインコアを嵌合することができる。これによれば、インコアにより樹脂製短管の挿入側部が縮径変形するのを防止する補強機能を発揮し、樹脂製短管が受口部から抜出るのをより確実に防止することができる。 The pipe joint assembling method of the present invention comprises, as described in claim 1, a joint main body having a receiving part at least at one end, and a resin short pipe that can be inserted into the receiving part of the joint main body. In the assembling method of a pipe joint, the joint body has an annular shape having a taper tapering inward in the axial direction and a vertical part perpendicular to the axial direction on the inner periphery of the receiving portion. An inward claw portion is provided, and the resin short tube has a tapered portion and a perpendicular portion perpendicular to the axial direction on the outer periphery of the insertion side portion into the receiving portion, An annular outward claw portion that is engaged with the inward claw portion in a retaining shape and can be deformed to expand and contract is provided, and either one of the joint body or the resin short tube is connected to the other insertion side And press-fitting into any one of the receiving part, and with the press-fitting, the outward direction of the resin short pipe A portion that slides in contact with the taper of the inward claw portion in the joint body with the tapered taper and gets over the inward claw portion while being reduced in diameter by the inward claw portion. Due to the elastic restoring action, the vertical portion of the inward claw portion is engaged with the vertical portion of the outward claw portion so as to oppose each other, and then the resin short pipe is opened from the rear end opening of the resin short tube. The in-core is inserted into the short pipe, and the in-core is fitted to the inner periphery of the insertion side portion of the resin short pipe.
According to such a configuration, since the inward claw portion and the outward claw portion are engaged with each other only by press-fitting the resin short tube into the receiving portion of the joint body, the resin short tube is It can be easily and quickly connected to the joint body in a retaining manner.
Moreover, an in-core can be fitted to the inner periphery of the insertion side portion of the resin short pipe. According to this, the reinforcement function which prevents the insertion side part of the resin short pipe from being reduced in diameter by the in-core is demonstrated, and the resin short pipe can be more reliably prevented from being pulled out from the receiving part. it can.

また、本発明の管継手の組立て方法は、請求項２に記載のように、少なくとも一端に受口部を有する継手本体と、この継手本体の前記受口部に挿入可能とする短管状の樹脂製短管と、前記受口部に挿入された樹脂製短管の挿入側部の外周と前記受口部の内周との間に介在されたシールリングとを備えている管継手の組立て方法において、前記継手本体は、前記受口部の内周に、前記シールリングが嵌合状に収容される環状のシールリング収容凹溝と、該シールリング収容凹溝の軸方向外方側に配され軸方向内方に向かって窄まり状のテーパ、及び軸方向に対し直角の垂直部を有し、径方向内方へ向かって突出する環状の内向き爪部と、が設けられており、前記樹脂製短管は、その挿入側部の外周に、前記内向き爪部に抜止め状に係合されるとともに前記シールリングの内径部を押圧し、先窄まり状のテーパと軸方向に対し直角の垂直部とを有する環状の拡縮径変形可能な外向き爪部が径方向外方へ向かって突出するように設けられており、前記シールリングを前記継手本体内の前記シールリング収容凹溝内に収容し、前記継手本体および前記樹脂製短管のいずれか一方を、他方の前記挿入側部および前記受口部のいずれかに圧入し、その圧入に伴い、前記外向き爪部が、そのテーパを前記継手本体内の前記シールリングの内径部に摺接して、前記外向き爪部が前記内向き爪部を乗り越える途上で該シールリングを前記シールリング収容凹溝内に押し付けるよう圧縮させながら該シールリング内を通過し、前記シールリング内を通過後、該テーパを前記継手本体内の内向き爪部のテーパに摺接し、該内向き爪部で縮径されながら該内向き爪部を乗り越えて前記外向き爪部の弾性復元作用により該内向き爪部の垂直部に前記外向き爪部の垂直部を互いに対向させるように係合し、しかる後、前記樹脂製短管の後端開口部から前記樹脂製短管内にインコアを挿入し、該インコアが前記樹脂製短管の挿入側部の内周に嵌合することに特徴を有するものである。
このような構成によれば、樹脂製短管を継手本体の受口部に圧入するだけで内向き爪部と外向き爪部とが互いに抜止め状に係合するため、樹脂製短管を継手本体に抜止め状にかつシール状に簡易迅速に接続することができる。
また、前記樹脂製短管の挿入側部の内周にインコアを嵌合することができる。これによれば、インコアにより樹脂製短管の挿入側部が縮径変形するのを防止する補強機能を発揮し、樹脂製短管が受口部から抜出るのをより確実に防止することができる。 The pipe joint assembling method according to the present invention includes, as described in claim 2, a joint body having a receiving portion at least at one end, and a short tubular resin that can be inserted into the receiving portion of the joint body. A method of assembling a pipe joint, comprising: a short tube; and a seal ring interposed between the outer periphery of the insertion side portion of the resin short tube inserted into the receiving portion and the inner periphery of the receiving portion The joint body is disposed on the inner periphery of the receiving portion at an annular seal ring receiving groove in which the seal ring is received in a fitting manner, and on an axially outer side of the seal ring receiving groove. A taper tapering inward in the axial direction, and an annular inward claw portion having a perpendicular portion perpendicular to the axial direction and projecting inward in the radial direction, When the resin short pipe is engaged with the inward claw portion in a retaining manner on the outer periphery of the insertion side portion thereof An annular outwardly deformable outward claw portion that presses the inner diameter portion of the seal ring and has a tapered taper and a perpendicular portion perpendicular to the axial direction protrudes outward in the radial direction. The seal ring is housed in the seal ring housing groove in the joint body, and either the joint body or the resin short tube is placed in the other insertion side portion and Press-fitting into one of the receiving portions, and with the press-fitting, the outward claw portion slidably contacts the taper with the inner diameter portion of the seal ring in the joint body, and the outward claw portion Passing through the seal ring while compressing the seal ring so that it is pressed into the seal ring receiving concave groove on the way over the direction claw, and after passing through the seal ring, the taper is directed inward in the joint body. Nail tape Slidably in contact with the inward claw portion, and overcoming the inward claw portion while elastically restoring the outward claw portion, the vertical portion of the outward claw portion is placed on the vertical portion of the inward claw portion. Engage so that they face each other, and then insert an incore into the resin short tube from the rear end opening of the resin short tube, and the incore is on the inner periphery of the insertion side of the resin short tube It has a feature in fitting.
According to such a configuration, since the inward claw portion and the outward claw portion are engaged with each other only by press-fitting the resin short tube into the receiving portion of the joint body, the resin short tube is It can be easily and quickly connected to the joint body in a retaining manner and in a sealing manner.
Moreover, an in-core can be fitted to the inner periphery of the insertion side portion of the resin short pipe. According to this, the reinforcement function which prevents the insertion side part of the resin short pipe from being reduced in diameter by the in-core is demonstrated, and the resin short pipe can be more reliably prevented from being pulled out from the receiving part. it can.

請求項１又は２記載の管継手の組立て方法は、請求項３記載のように、前記樹脂製短管に樹脂管の一端部を接合することができる。また請求項４記載のように、前記樹脂製短管は前記受口部に相対回転可能に挿入可能である。これによれば、樹脂製短管に樹脂管を接合した後でも、給水栓、バルブ等の器具に継手本体をねじ込むことができ、このねじ込みにより簡易に取付けることができる。   The pipe joint assembling method according to claim 1 or 2 can join one end of the resin pipe to the resin short pipe as described in claim 3. According to a fourth aspect of the present invention, the resin short tube can be inserted into the receiving portion so as to be relatively rotatable. According to this, even after the resin pipe is joined to the resin short pipe, the joint body can be screwed into an instrument such as a water tap and a valve, and can be easily attached by this screwing.

本発明によれば、樹脂製短管を継手本体の受口部に挿入するだけで樹脂製短管を継手本体に抜止め状にかつシール状に接続することができ、前述した従来の管継手のような多角形の工具掛け部を有するナット（押輪）は省略することができ、これに伴い継手本体の工具掛け部の外径も小さくすることができるのでコスト低減、小型化、コンパクト化を図ることができ、しかもナットの締付け作業を省略でき樹脂製短管を継手本体の受口部に挿入するだけの簡単な作業で足りるため組立て作業性に優れ、しかも施工後のナットの緩みや締付け不足の問題も解消できて水漏れ事故の発生を確実に防止できる。   According to the present invention, it is possible to connect the resin short pipe to the joint main body in a retaining shape and in a seal shape by simply inserting the resin short pipe into the receiving portion of the joint main body. The nut (press ring) having a polygonal tool hanger as shown in the figure can be omitted, and the outer diameter of the tool hanger of the joint body can be reduced accordingly, thereby reducing costs, downsizing and downsizing. It is possible to reduce the tightening work of the nut, and it is easy to insert the resin short pipe into the joint receiving part. The assembly workability is excellent, and the nut is loosened and tightened after installation. The shortage problem can be solved and the occurrence of a water leak accident can be surely prevented.

本発明の一実施例を示す管継手の半欠截断面図である。1 is a half-broken cross-sectional view of a pipe joint showing an embodiment of the present invention. 図１の管継手の組立て過程を示す断面図である。It is sectional drawing which shows the assembly process of the pipe joint of FIG. 他の実施例を示す管継手の半欠截断面図である。FIG. 6 is a half cutaway cross-sectional view of a pipe joint showing another embodiment. 従来例の管継手の半欠截断面図である。It is a half notched cross-sectional view of a conventional pipe joint.

本発明の好適な実施形態を図面に基づき説明する。図１は本発明の一実施例を示す管継手の半欠截断面図、図２は図１の管継手の組立て過程を示す断面図である。   A preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a pipe joint according to one embodiment of the present invention, and FIG. 2 is a cross-sectional view showing an assembly process of the pipe joint of FIG.

本発明の組立て方法に係る管継手は、図１に示すように、継手本体１、樹脂製短管２、およびシールリング３などからなる。   As shown in FIG. 1, the pipe joint according to the assembling method of the present invention includes a joint body 1, a resin short pipe 2, a seal ring 3, and the like.

図１、図２（ａ）に示すように、継手本体１は金属材料や樹脂材料などからなり、一端に樹脂製短管２を挿入可能とする受口部４を開口し、この受口部４の内周にシールリング３が収容される環状のシールリング収容凹溝５と、このシールリング収容凹溝５より軸方向内奥側に並べて配され、軸方向内方に向かって窄まり状のテーパ６ａと軸方向に対し直角の垂直部６ｂを有する断面鋸歯形状で環状の内向き爪部６とを設けている。継手本体１の他端の外周には、給水栓やバルブ等の器具にねじ込み可能な雄ねじ７を設けている。継手本体１の受口部４の外周には多角形の工具掛け部１ａを設けている。なお、図示例の継手本体１はストレート型であるが、エルボ型やティ−型などの場合もある。また、図示例の継手本体１はこれの他端の外周に雄ねじを設けてあるが、他端の内周に雌ねじを設けることもある。   As shown in FIG. 1 and FIG. 2 (a), the joint body 1 is made of a metal material, a resin material, or the like, and opens a receiving portion 4 that allows a resin short tube 2 to be inserted at one end. An annular seal ring housing groove 5 in which the seal ring 3 is housed on the inner periphery of 4, and arranged side by side on the inner side in the axial direction from the seal ring housing groove 5, and is narrowed inward in the axial direction And an annular inward claw portion 6 having a sawtooth cross section having a vertical portion 6b perpendicular to the axial direction. On the outer periphery of the other end of the joint body 1, a male screw 7 that can be screwed into an instrument such as a water tap or a valve is provided. A polygonal tool hanging portion 1 a is provided on the outer periphery of the receiving portion 4 of the joint body 1. In the illustrated example, the joint body 1 is a straight type, but may be an elbow type or a tee type. Moreover, although the coupling main body 1 of the example of illustration has provided the external thread in the outer periphery of this other end, it may provide an internal thread in the inner periphery of the other end.

図１、図２（ａ）に示すように、樹脂製短管２は、ポリブテン、ポリエチレン、塩化ビニルなど樹脂材料で図示例のごとくストレート、或いは図外のエルボ形状などに形成される。樹脂製短管２の受口部４への挿入側部は継手本体１の受口部４に相対回転可能に挿入可能な径小に形成され、この挿入側部の外周には、前記内向き爪部６の断面鋸歯形状とは逆向きの断面鋸歯形状に形成されて先窄まり状のテーパ８ａと軸方向に対し直角の垂直部８ｂを有する拡縮径変形可能な外向き爪部８が環状に設けられている。樹脂製短管２の後端開口部の内径は、図１に二点鎖線で示すように、樹脂製短管２の材料と同じようにポリブテン、ポリエチレン、塩化ビニルなど樹脂材料からなる樹脂管Ｐの一端部が挿入されて熱融着または電気融着で接合できるように構成している。樹脂製短管２と樹脂管Ｐの一端部との接合手段としては熱融着・電気融着以外に、接着手段でも可能である。樹脂製短管２の挿入側部の内周には、樹脂製短管２が継手本体１に抜止め状に接続された後にＰＰＳ、ＰＰＥ等硬質樹脂や金属材料などからなるインコア９が嵌合されるようになっている。   As shown in FIGS. 1 and 2 (a), the resin short tube 2 is formed of a resin material such as polybutene, polyethylene, or vinyl chloride in a straight shape as shown in the drawing or an elbow shape outside the drawing. An insertion side portion of the resin short tube 2 into the receiving portion 4 is formed with a small diameter so that it can be inserted into the receiving portion 4 of the joint body 1 so as to be relatively rotatable. An outwardly deformable claw portion 8 that is formed in a sawtooth shape opposite to the cross-sectional sawtooth shape of the claw portion 6 and has a tapered taper 8a and a vertical portion 8b perpendicular to the axial direction is deformable. Is provided. The inner diameter of the rear end opening of the resin short tube 2 is a resin tube P made of a resin material such as polybutene, polyethylene, or vinyl chloride, as shown by a two-dot chain line in FIG. One end of each is inserted and can be joined by heat fusion or electric fusion. As a joining means between the resin short tube 2 and one end portion of the resin pipe P, an adhesive means can be used in addition to the heat fusion / electric fusion. An in-core 9 made of a hard resin such as PPS or PPE or a metal material is fitted to the inner circumference of the insertion side portion of the resin short tube 2 after the resin short tube 2 is connected to the joint body 1 in a retaining manner. It has come to be.

上記継手本体１の内向き爪部６と樹脂製短管２の外向き爪部８との位置関係については、図１のように、樹脂製短管２が継手本体１の受口部４内に所定深さにまで挿入されると、内向き爪部６と外向き爪部８とが互いに抜止め状に係合するように設定されている。   As for the positional relationship between the inward claw portion 6 of the joint body 1 and the outward claw portion 8 of the resin short tube 2, the resin short tube 2 is located in the receiving portion 4 of the joint body 1 as shown in FIG. 1. When inserted to a predetermined depth, the inward claw portion 6 and the outward claw portion 8 are set so as to engage with each other in a retaining manner.

シールリング３はＯリング等からなって、樹脂製短管２の挿入側部の外径より小さい内径部を有する。シールリング３はこれの内径部が受口部４の内周面より径方向内方へ突出するように継手本体１のシールリング収容凹溝５内に嵌め込まれることで収容される。   The seal ring 3 is made of an O-ring or the like and has an inner diameter portion that is smaller than the outer diameter of the insertion side portion of the resin short tube 2. The seal ring 3 is accommodated by being fitted into the seal ring accommodating groove 5 of the joint body 1 such that the inner diameter portion of the seal ring 3 protrudes radially inward from the inner peripheral surface of the receiving portion 4.

次に、上記管継手の組立て要領について図２を参照にして説明する。
先ず、図２（ａ）に示すように、シールリング３を継手本体１内のシールリング収容凹溝５内に収容する。次いで、同図（ｂ）のように、樹脂製短管２の挿入側部に継手本体１の受口部４を圧入するか、または樹脂製短管２の挿入側部を継手本体１の受口部４に圧入する。その圧入に伴い、樹脂製短管２の外向き爪部８が、テーパ８ａを継手本体１内のシールリング３の内径部に摺接し、シールリング３をシールリング収容凹溝５内に押し付けるよう圧縮させながら該シールリング３内を通過する。樹脂製短管２の外向き爪部８は、シールリング３内を通過後、該テーパ８ａを継手本体１内の内向き爪部６のテーパ６ａに摺接し、該内向き爪部６で縮径されながら該内向き爪部６を乗り越えて弾性復元作用により該内向き爪部６の垂直部６ｂに垂直部８ｂを対向させるように係合する。この係合により樹脂製短管２が受口部４から抜け出るのを防止される状態が得られるとともに、シールリング３が継手本体１の受口部４の内周と樹脂製短管２の挿入側部の外周との間で圧縮されてその間で水漏れのないシール状態が得られる。最後に、同図（ｃ）に示すインコア９が樹脂製短管２の後端開口部から樹脂製短管２内に挿入され、図１のように該樹脂製短管２の挿入側部の内周に嵌合されて組立てを完了する。 Next, the assembly procedure of the pipe joint will be described with reference to FIG.
First, as shown in FIG. 2A, the seal ring 3 is accommodated in the seal ring accommodating concave groove 5 in the joint body 1. Next, as shown in FIG. 5B, the receiving port 4 of the joint body 1 is press-fitted into the insertion side portion of the resin short tube 2 or the insertion side portion of the resin short tube 2 is received by the joint body 1. Press fit into the mouth 4. Along with the press-fitting, the outward claw portion 8 of the resin short pipe 2 slides the taper 8 a against the inner diameter portion of the seal ring 3 in the joint body 1 so as to press the seal ring 3 into the seal ring receiving groove 5. It passes through the seal ring 3 while being compressed. After passing through the seal ring 3, the outward claw portion 8 of the resin short pipe 2 is brought into sliding contact with the taper 6 a of the inward claw portion 6 in the joint body 1, and is contracted by the inward claw portion 6. The inward claw portion 6 is overcome while being diametered, and is engaged by the elastic restoring action so that the vertical portion 8b faces the vertical portion 6b of the inward claw portion 6. This engagement provides a state in which the resin short tube 2 is prevented from coming out of the receiving portion 4, and the seal ring 3 is inserted into the inner periphery of the receiving portion 4 of the joint body 1 and the resin short tube 2. A compressed state is obtained between the outer periphery of the side portions and no water leakage occurs between them. Finally, the in-core 9 shown in FIG. 3C is inserted into the resin short tube 2 from the rear end opening of the resin short tube 2, and the insertion side portion of the resin short tube 2 is inserted as shown in FIG. The assembly is completed by fitting to the inner periphery.

インコア９を樹脂製短管２の挿入側部の内周に嵌合することで、組立て後、樹脂製短管２に抜出し方向の引張力が強く働いた場合も樹脂製短管２の挿入側部が縮径するのを確実に防止することができ、樹脂製短管２の抜止め対策を万全なものとする。   By inserting the in-core 9 into the inner periphery of the insertion side portion of the resin short tube 2, the insertion side of the resin short tube 2 can be applied even when a pulling force is exerted on the resin short tube 2 after assembly. It is possible to reliably prevent the diameter of the portion from being reduced, and to take measures to prevent the resin short tube 2 from being pulled out.

この組立て状態では樹脂製短管２は継手本体１に対し相対回転可能であるので、樹脂製短管２に給水用等の樹脂管Ｐを接合した後でも、継手本体１の雄ねじ７を給水栓、バルブ等の器具（図示せず）にねじ込むことができて該器具に継手本体１を取付けることができる。   In this assembled state, since the resin short pipe 2 can rotate relative to the joint body 1, the male screw 7 of the joint body 1 can be connected to the water tap even after the resin pipe P for water supply or the like is joined to the resin short pipe 2. The joint body 1 can be attached to the instrument such as a valve by screwing it into the instrument (not shown).

上記実施例の管継手では、継手本体１において内向き爪部６がシールリング３の収容されるシールリング収容凹溝５より軸方向内奥側に並べて配されるが、これに代えて、図３に他の実施例を示すように、継手本体１の受口部４の内周に設けた環状のシールリング収容凹溝５の軸方向外方側に、軸方向内方に向かって窄まり状のテーパ１０ａ、軸方向に平行な平坦頂部１０ｂ、及び軸方向に対し直角の垂直部１０ｃを有する断面台形状の内向き爪部１０を径方向内方へ向かって突出するように環状に設けることもできる。一方、樹脂製短管２の挿入側部の外周には、前記内向き爪部１０の断面台形状とは逆向きの断面台形状であって、先窄まり状のテーパ１１ａ、軸方向に平行な平坦頂部１１ｂ、及び軸方向に対し直角の垂直部１１ｃを有する拡縮径変形可能な外向き爪部１１を径方向外方へ向かって突出するように環状に設けている。   In the pipe joint of the above embodiment, the inward claw portion 6 in the joint body 1 is arranged side by side in the axially inner side from the seal ring housing concave groove 5 in which the seal ring 3 is housed. As shown in FIG. 3, the axially outwardly narrowed annular seal ring receiving groove 5 provided on the inner periphery of the receiving portion 4 of the joint body 1 squeezes inward in the axial direction. A taper-shaped taper 10a, a flat top portion 10b parallel to the axial direction, and a trapezoidal inward claw portion 10 having a perpendicular portion 10c perpendicular to the axial direction are provided in an annular shape so as to protrude radially inward. You can also. On the other hand, the outer periphery of the insertion side portion of the resin short tube 2 has a trapezoidal cross-sectional shape opposite to the cross-sectional trapezoidal shape of the inward claw portion 10, and has a tapered taper 11 a parallel to the axial direction. An outward claw portion 11 having a flat top portion 11b and a vertical portion 11c perpendicular to the axial direction and capable of expanding and contracting diameter is provided in an annular shape so as to protrude outward in the radial direction.

このような構成の管継手を組立てるには、先ず、上記実施例の場合と同様に、シールリング３を継手本体１内のシールリング収容凹溝５内に収容する。次いで、樹脂製短管２の挿入側部に継手本体１の受口部４を圧入するか、または樹脂製短管２の挿入側部を継手本体１の受口部４に圧入する。その圧入に伴い、樹脂製短管２の外向き爪部１１がテーパ１１ａを継手本体１の内向き爪部１０のテーパ１０ａに摺接し、内向き爪部１０で縮径されながら該内向き爪部１０の平坦頂部１０ｂを乗り越えて弾性復元作用により該内向き爪部１０の垂直部１０ｃに垂直部１１ｃを対向させるように係合する。その際、外向き爪部１１が内向き爪部１０を乗り越えた後に弾性復元できない場合は該外向き爪部１１を後述するインコア９等で拡げて復元させる。
また外向き爪部１１が内向き爪部１０を乗り越える途上で、該外向き爪部１１の平坦頂部１１ｂがシールリング３の内径部に摺接し、該シールリング３をシールリング収容凹溝５内に押し付けるよう圧縮させてこの圧縮状態を維持する。
最後に、樹脂製短管２の後端開口部からインコア９が樹脂製短管２内に挿入され、該樹脂製短管２の挿入側部の内周に嵌合されて組立てを完了する。 In order to assemble the pipe joint having such a configuration, first, the seal ring 3 is accommodated in the seal ring accommodating concave groove 5 in the joint main body 1 as in the case of the above embodiment. Next, the receiving portion 4 of the joint body 1 is press-fitted into the insertion side portion of the resin short tube 2, or the insertion side portion of the resin short tube 2 is pressed into the receiving portion 4 of the joint body 1. With the press-fitting, the outward claw portion 11 of the resin short tube 2 slides the taper 11 a into the taper 10 a of the inward claw portion 10 of the joint body 1, and the inward claw is reduced in diameter by the inward claw portion 10. The flat top portion 10b of the portion 10 is overcome and engaged so that the vertical portion 11c faces the vertical portion 10c of the inward claw portion 10 by an elastic restoring action. At that time, when the outward claw portion 11 cannot be elastically restored after getting over the inward claw portion 10, the outward claw portion 11 is expanded and restored by an in-core 9 or the like described later.
Further, on the way the outward claw portion 11 gets over the inward claw portion 10, the flat top portion 11 b of the outward claw portion 11 is in sliding contact with the inner diameter portion of the seal ring 3, and the seal ring 3 is placed in the seal ring housing groove 5. This compressed state is maintained by compressing it so that it is pressed against.
Finally, the in-core 9 is inserted into the resin short tube 2 from the rear end opening of the resin short tube 2 and is fitted to the inner periphery of the insertion side portion of the resin short tube 2 to complete the assembly.

上記のように樹脂製短管２の外向き爪部１１が内向き爪部１０に係合することにより樹脂製短管２が継手本体１の受口部４から抜け出るのを防止される状態が得られるとともに、シールリング３が継手本体１の受口部４の内周と樹脂製短管２の外向き爪部１１との間で圧縮されてその間で水漏れのないシール状態が得られる。
この実施例のように継手本体１の内向き爪部１０をシールリング収容凹溝５の軸方向外方側に設ける構成によると、図１に示す上記実施例の継手本体１に比較して継手本体１の軸方向長さの短縮化、小型化を図ることができる。 As described above, when the outward claw portion 11 of the resin short tube 2 is engaged with the inward claw portion 10, the resin short tube 2 is prevented from coming out of the receiving portion 4 of the joint body 1. As a result, the seal ring 3 is compressed between the inner periphery of the receiving portion 4 of the joint body 1 and the outward claw portion 11 of the resin short tube 2, and a sealed state without water leakage is obtained therebetween.
According to the configuration in which the inward claw portion 10 of the joint body 1 is provided on the axially outer side of the seal ring receiving groove 5 as in this embodiment, the joint body is compared with the joint body 1 of the above embodiment shown in FIG. The axial length of the main body 1 can be shortened and downsized.

なお、上記実施形態では、継手本体１の他端部を給水栓等器具に接続する場合について説明したが、継手本体１の他端側にも一端側の受口部４と同じ受口部を設けてこの受口部にも、一端側の樹脂製短管２と同一構成の樹脂製短管２を同様に挿入接続することで、両端の樹脂製短管２にそれぞれ接合する樹脂管Ｐどうしを接続する形態の管継手とすることもできる。   In addition, although the said embodiment demonstrated the case where the other end part of the coupling main body 1 was connected to instruments, such as a water faucet, the same receptacle part as the receptacle part 4 of the one end side was also provided in the other end side of the coupling main body 1. The resin short pipe 2 having the same configuration as that of the resin short pipe 2 on one end side is similarly inserted and connected to the receiving portion so that the resin pipes P joined to the resin short pipes 2 on both ends are connected to each other. It can also be set as the pipe joint of the form which connects.

１ 継手本体
２ 樹脂製短管
３ シールリング
４ 受口部
５ シールリング収容凹溝
６ａ、１０ａ テーパ
６ｂ、１０ｃ 垂直部
６、１０ 内向き爪部
８ａ、１１ａ テーパ
８ｂ、１１ｃ 垂直部
８、１１ 外向き爪部
９ インコア DESCRIPTION OF SYMBOLS 1 Joint body 2 Resin short pipe 3 Seal ring 4 Receiving part 5 Seal ring accommodation recessed groove 6a, 10a Taper 6b, 10c Vertical part 6, 10 Inward claw part 8a, 11a Taper 8b, 11c Vertical part 8, 11 Outside Orientation claw part 9 Incore

Claims (4)

少なくとも一端に受口部を有する継手本体と、この継手本体の前記受口部に挿入可能とする樹脂製短管とを備えている管継手の組立て方法において、
前記継手本体は、前記受口部の内周に、軸方向内方に向かって窄まり状のテーパと軸方向に対し直角の垂直部とを有する環状の内向き爪部が設けられており、
前記樹脂製短管は、前記受口部内への挿入側部の外周に、先窄まり状のテーパと軸方向に対し直角の垂直部とを有し、前記内向き爪部に抜止め状に係合され拡縮径変形可能な環状の外向き爪部が設けられており、
前記継手本体および前記樹脂製短管のいずれか一方を、他方の前記挿入側部および前記受口部のいずれかに圧入し、
その圧入に伴い、
前記樹脂製短管の前記外向き爪部は、該先窄まり状のテーパを前記継手本体内の前記内向き爪部のテーパに摺接し、該内向き爪部で縮径されながら該内向き爪部を乗り越えて前記外向き爪部の弾性復元作用により、該内向き爪部の垂直部に前記外向き爪部の垂直部を互いに対向させるように係合し、
しかる後、前記樹脂製短管の後端開口部から前記樹脂製短管内にインコアを挿入し、該インコアが前記樹脂製短管の挿入側部の内周に嵌合することを特徴とする、管継手の組立て方法。 In a method of assembling a pipe joint comprising a joint body having a receiving part at least at one end, and a resin short pipe that can be inserted into the receiving part of the joint body,
The joint body is provided with an annular inward claw portion having a taper tapered inward in the axial direction and a vertical portion perpendicular to the axial direction on the inner periphery of the receiving portion,
The resin short tube has a tapered shape and a perpendicular portion perpendicular to the axial direction on the outer periphery of the insertion side portion into the receiving portion, and is secured to the inward claw portion. An annular outward claw portion that is engaged and deformable to expand and contract is provided.
Either one of the joint main body and the resin short pipe is press-fitted into one of the other insertion side part and the receiving part,
With the press fit,
The outward claw portion of the resin short pipe is in contact with the taper of the tapered shape in contact with the taper of the inward claw portion in the joint body, and the inward claw portion is reduced in diameter by the inward claw portion. Engage so that the vertical portions of the outward claws are opposed to each other by the elastic restoring action of the outward claws over the claws,
Thereafter, the incore is inserted into the resin short tube from the rear end opening of the resin short tube, and the incore is fitted to the inner periphery of the insertion side portion of the resin short tube. How to assemble pipe fittings. 少なくとも一端に受口部を有する継手本体と、この継手本体の前記受口部に挿入可能とする短管状の樹脂製短管と、前記受口部に挿入された樹脂製短管の挿入側部の外周と前記受口部の内周との間に介在されたシールリングとを備えている管継手の組立て方法において、
前記継手本体は、前記受口部の内周に、前記シールリングが嵌合状に収容される環状のシールリング収容凹溝と、該シールリング収容凹溝の軸方向外方側に配され軸方向内方に向かって窄まり状のテーパ、及び軸方向に対し直角の垂直部を有し、径方向内方へ向かって突出する環状の内向き爪部と、が設けられており、
前記樹脂製短管は、その挿入側部の外周に、前記内向き爪部に抜止め状に係合されるとともに前記シールリングの内径部を押圧し、先窄まり状のテーパと軸方向に対し直角の垂直部とを有する環状の拡縮径変形可能な外向き爪部が径方向外方へ向かって突出するように設けられており、
前記シールリングを前記継手本体内の前記シールリング収容凹溝内に収容し、
前記継手本体および前記樹脂製短管のいずれか一方を、他方の前記挿入側部および前記受口部のいずれかに圧入し、
その圧入に伴い、
前記外向き爪部が、そのテーパを前記継手本体内の前記シールリングの内径部に摺接して、前記外向き爪部が前記内向き爪部を乗り越える途上で該シールリングを前記シールリング収容凹溝内に押し付けるよう圧縮させながら該シールリング内を通過し、
前記シールリング内を通過後、該テーパを前記継手本体内の内向き爪部のテーパに摺接し、該内向き爪部で縮径されながら該内向き爪部を乗り越えて前記外向き爪部の弾性復元作用により該内向き爪部の垂直部に前記外向き爪部の垂直部を互いに対向させるように係合し、
しかる後、前記樹脂製短管の後端開口部から前記樹脂製短管内にインコアを挿入し、該インコアが前記樹脂製短管の挿入側部の内周に嵌合することを特徴とする、管継手の組立て方法。 A joint body having a receiving part at least at one end, a short tubular resin short pipe that can be inserted into the receiving part of the joint body, and an insertion side part of the resin short pipe inserted into the receiving part In a method for assembling a pipe joint comprising a seal ring interposed between the outer periphery of the receiving portion and the inner periphery of the receiving portion,
The joint body includes an annular seal ring receiving groove in which the seal ring is received in a fitting manner on an inner periphery of the receiving portion, and an axially disposed shaft on the outer side in the axial direction of the seal ring receiving groove. A taper tapered toward the inside in the direction, and an annular inward claw portion having a perpendicular portion perpendicular to the axial direction and projecting radially inward,
The resin short pipe is engaged with the inward claw portion in a retaining manner on the outer periphery of the insertion side portion and presses the inner diameter portion of the seal ring, and has a tapered shape and an axial direction. An annular outwardly deformable claw portion having a right-angled vertical portion is provided so as to protrude radially outward,
Receiving the seal ring in the seal ring receiving groove in the joint body;
Either one of the joint main body and the resin short pipe is press-fitted into one of the other insertion side part and the receiving part,
With the press fit,
The outward claw portion slidably contacts the taper with the inner diameter portion of the seal ring in the joint main body, and the seal ring is inserted into the seal ring receiving recess on the way the outward claw portion gets over the inward claw portion. Passing through the seal ring while compressing to press into the groove,
After passing through the seal ring, the taper is brought into sliding contact with the taper of the inward claw portion in the joint main body, and the diameter of the inward claw portion is reduced to overcome the inward claw portion and Engage the vertical part of the inward claw part with the vertical part of the inward claw part so as to oppose each other by elastic restoring action,
Thereafter, the incore is inserted into the resin short tube from the rear end opening of the resin short tube, and the incore is fitted to the inner periphery of the insertion side portion of the resin short tube. How to assemble pipe fittings. 前記樹脂製短管に樹脂管の一端部を接合する、請求項１又は２記載の管継手の組立て方法。   The method for assembling a pipe joint according to claim 1 or 2, wherein one end of a resin pipe is joined to the resin short pipe. 前記樹脂製短管は前記受口部に相対回転可能に挿入可能である、請求項１ないし３のいずれか１項に記載の管継手の組立て方法。   The pipe joint assembly method according to any one of claims 1 to 3, wherein the resin short pipe can be inserted into the receiving portion so as to be relatively rotatable.

Images