JP4048936B2

JP4048936B2 - Piping joint

Info

Publication number: JP4048936B2
Application number: JP2002348868A
Authority: JP
Inventors: 誠吉野
Original assignee: Denso Corp
Current assignee: Denso Corp
Priority date: 2002-11-29
Filing date: 2002-11-29
Publication date: 2008-02-20
Anticipated expiration: 2022-11-29
Also published as: JP2004183703A

Description

【０００１】
【発明の属する技術分野】
本発明は流体用配管部材、例えば、冷凍サイクルの冷媒用配管部材を連結するのに好適な配管継手に関する。
【０００２】
【従来の技術】
一般に、冷凍サイクルの冷媒用配管部材を連結する配管継手においては、雄側継手としての第１の配管部材と雌側継手としての第２の配管部材を連結する際、配管継手の部品点数を少なくして配管作業を容易にしたり誤組付がないように行なったりすることが課題として挙げられていた。例えば、従来の配管継手においては、図１８に示すような配管継手構造（特許文献１）に使用されている配管継手や、図１９に示すような配管継手構造（特許文献２）に使用されている配管継手が知られている。
【０００３】
前者の特許文献１に示されている配管継手では、配管外周面より膨拡状の鍔部１０１を有する第１の配管部材１００とテーパ外面１０６を有する第２の配管部材１０５とを接続した後で、両配管部材１００・１０５を固定する配管継手としての第１の固定部材１１０と第２の固定部材１１５とが、それぞれ第１の配管部材１００と第２の配管部材１０５を覆うように構成されている。第１の固定部材１１０は、筒状に形成されるとともに内部に螺旋状の突起部１１１を備え、第２の固定部材１１５は、筒状に形成されるとともに突起部１１１に係合可能な爪部１１６を備えている。そして第１の配管部材１００が第２の配管部材１０５に挿入された後、第２の固定部材１１５を第１の固定部材１１０に対して回転させることによって、爪部１１６が突起部１１１に係合されて第１の固定部材１１０と第２の固定部材１１５がロックされ、それに伴って、第１の固定部材１１０の筒部の先端に形成される鍔部係合部１１２が、第１の配管部材１００の鍔部１０１を押圧し、第２の固定部材１１５のテーパ内面１１７が第２の配管部材１０５のテーパ外面１０６を押圧することによって、第１の配管部材１００と第２の配管部材１０５とが連結可能に構成される。
【０００４】
後者の特許文献２に示されている配管継手構造では、挿入部１２１に環状突起部１２２を有する配管部材１２０を雌側継手１２５の挿入受け口１２６に接続する際、円周上の一部を軸方向に沿って切り欠いたリング状の固定部材１３０を両者間に嵌め込むことによって配管部材１２０の軸方向への脱着を規制するように構成されている。固定部材１３０は、周方向に弾性を有する弾性ストッパとして形成され、雌側継手１２５の挿入受け口１２６に円周方向に形成された溝１２７に嵌入する円弧状凸条１３１を備えている。円弧状凸条１３１は、配管部材１２０が雌側継手１２５の挿入受け口１２６に挿入して環状突起部１２２の先端面を雌側継手１２５の受け面１２８に当接すると、環状突起部１２２を雌側継手１２５の受け面１２８との間で挟持するように配置される。
【０００５】
従って、円弧状凸条１３１は、雌側継手１２５の挿入受け口１２６に形成された溝１２７に嵌入して環状突起部１２２の後方への移動を規制することにより、配管部材１２０の雌側継手１２５からの脱着を防止することができる。しかも固定部材１３０は円周上の一部が軸方向に沿って切り欠かれていることから、周方向に弾性を有することになって円弧状凸条１３１を挿入受け口１２６の溝１２７に容易に嵌め込むことができる。
【０００６】
【特許文献１】
特開平７−３３２５６３号公報（４〜５頁、図１）
【特許文献２】
特開平８−２００５７７号公報（３〜６頁、図１）
【０００７】
【発明が解決しようとする課題】
しかし、従来の公報に示されている配管継手のうち、前者の場合、第１の固定部材１１０と第２の固定部材１１５とを第１の配管部材１００と第２の配管部材１０５と別に製作してそれぞれ突起部１１１あるいは爪部１１６を備えてそれぞれ係合するように構成していることから、部品点数が増えて両固定部材１１０・１１５の成形費と組付作業費がコストアップとなっていた。
【０００８】
また、後者の場合、配管継手としての固定部材１３０は、装着する際に方向性があることから、左右逆方向に嵌め込むと配管部材１２０と雌側継手１２５との接触部が必ずしも一致するとは限らず、お互いの接触部位で隙間ができたりあるいは組付不能となってしまったりする虞れがあった。
【０００９】
従って、本発明は、上述の課題を解決するものであり、コスト低減は勿論のこと、組付を容易にするとともに誤組付を発生しない配管継手を提供することを目的とする。
【００１０】
【課題を解決するための手段】
本発明に係る配管継手は、上記の課題を解決するために、請求項１記載の発明では、第１の配管部材と第２の配管部材を接続して固定する配管継手には、筒状に形成された本体の両端からそれぞれ交互に複数の第１の溝部と第２の溝部とが等間隔で形成され、前記第１の溝部間あるいは前記第２の溝部間に形成される本体の両端薄肉部においては、第１の配管部材あるいは第２の配管部材と係止可能な係止部が設けられている。
【００１１】
第１の溝部及び第２の溝部は端面が開口されていることから、第１の配管部材あるいは第２の配管部材に装着された配管継手は、挿入側のいずれかの配管部材を挿入する際に、薄肉部がいずれかの配管部材の挿入部に当接すると拡径していずれかの配管部材を挿入可能とし、いずれかの配管部材が挿入完了すると弾性復帰力によっていずれかの配管部材に係止部で係止することとなる。
【００１２】
従って、第１の配管部材あるいは第２の配管部材のいずれかを相手側の配管部材にワンタッチで挿入して固定できることから、組付作業を短時間で容易に行うことができる。しかも、配管継手は、左右両端に同様な溝部と係止部が形成されていることから、左右、逆方向に装着しても、組付に支障をもたらすことはなく誤組付を起こすことはない。
【００１３】
また、請求項２記載の発明では、第１の配管部材と第２の配管部材を接続して固定する配管継手には、筒状に形成された本体の両端からそれぞれ交互に一対の第１の溝部と第２の溝部とが軸心に対して対向する位置に形成され、前記第１の溝部間あるいは前記第２の溝部間に形成される薄肉部端においては、第１の配管部材あるいは第２の配管部材と係止可能な係止部がそれぞれ一対設けられている。
【００１４】
つまり、この発明においては、それぞれの端部に形成された溝部の中心線を結ぶ仮想直線は左端側と右端側とでは十字状に形成されることとなる。
【００１５】
第１の溝部及び第２の溝部は端面が開口されていることから、第１の配管部材あるいは第２の配管部材に装着された配管継手は、挿入側のいずれかの配管部材が挿入する際に、薄肉部がいずれかの配管部材の挿入部に当接すると拡径していずれかの配管部材を挿入可能とし、いずれかの配管部材が挿入完了すると弾性復帰力によっていずれかの配管部材に係止部で係止することとなる。
【００１６】
従って、第１の配管部材あるいは第２の配管部材のいずれかを相手側の配管部材にワンタッチで挿入して固定できることから、請求項１記載の発明と同様、組付作業を短時間で容易に行うことができる。しかも、配管継手は、左右両端に同様な溝部と係止部が形成されていることから、左右、逆方向に装着しても、組付に支障をもたらすことはなく誤組付を起こさない。
【００１７】
請求項３記載の発明では、請求項１又は２記載の発明における係止部は、第１の配管部材あるいは第２の配管部材が挿入する際、第１の配管部材あるいは第２の配管部材と当接すると、第１係止部あるいは第２係止部に形成されたテーパ面部で案内されて拡径され，第１の配管部材あるいは第２の配管部材の挿入部がテーパ面部を越えると、第１係止部あるいは第２係止部は弾性復帰力によって縮径されて第１の配管部材あるいは第２の配管部材の外周面に係止することとなる。
【００１８】
従って、第１の配管部材と第２の配管部材との組付をワンタッチで行うことができて短時間で組付作業を行うことができる。
【００１９】
請求項４記載の発明では、薄肉部を軸方向及び径方向に弾性を有する弾性材料で形成していることから、配管継手は、第１の配管部材あるいは第２の配管部材の外周面と密着して係止できシール性を向上するとともに、請求項３記載で説明した作用を薄肉部の損傷を発生することなくスムーズに行うことができる。
【００２０】
請求項５記載の発明では、第１の配管部材あるいは第２の配管部材を配管継手内に挿通する際、第１の配管部材あるいは第２の配管部材に装着されたシール部材の外径が、自然状態において配管継手の薄肉部の内径より小径に形成されていることから、シール部材の外周面を損傷することなく第１の配管部材と第２の配管部材との接続を行うことができる。
【００２１】
請求項６記載の発明では、第１の配管部材あるいは第２の配管部材を配管継手内に挿通する際、自然状態における配管継手の薄肉部の内径が、第１の配管部材あるいは第２の配管部材の外径より小径に形成されていることから、薄肉部の弾性復帰力で第１の配管部材あるいは第２の配管部材を係止する際、第１の配管部材あるいは第２の配管部材の外周面とのがたつきを吸収してシール性を向上することができる。
【００２２】
請求項７記載の発明は、第１の配管部材と第２の配管部材を配管継手で接続する配管継手構造であって、第１の配管部材と第２の配管部材を接続して固定する配管継手には、筒状に形成された本体の両端からそれぞれ交互に複数の第１の溝部と第２の溝部とが等間隔で形成され、前記第１の溝部間あるいは前記第２の溝部間に形成される薄肉部端においては、第１の配管部材あるいは第２の配管部材と係止可能な係止部が設けられている。
【００２３】
第１の溝部及び第２の溝部は端面が開口されていることから、第１の配管部材あるいは第２の配管部材に装着された配管継手は、挿入側のいずれかの配管部材を挿入する際に、薄肉部がいずれかの配管部材の挿入部に当接すると拡径していずれかの配管部材を挿入可能とし、いずれかの配管部材が挿入完了すると弾性復帰力によっていずれかの配管部材に係止部で係止することとなる。
【００２４】
従って、第１の配管部材あるいは第２の配管部材のいずれかを相手側の配管部材にワンタッチで挿入して固定できることから、組付作業を短時間で容易に行うことができる。しかも、配管継手は、左右両端に同様な溝部と係止部が形成されていることから、左右、逆方向に装着しても、組付に支障をもたらすことはなく誤組付を起こすことはない。
【００２５】
また、請求項８記載の発明では、請求項７記載の発明による第１の配管部材と第２の配管部材とが、それぞれテーパ面どうしで当接されることから、配管継手で接続して固定した状態では、配管継手が軸方向に弾性を有して形成されることによって、お互いのテーパ面どうしを圧接することとなって、広い範囲で接触できシール性を向上することができる。
【００２６】
さらに、請求項９記載の発明では、請求項７記載の発明による第２の配管部材の雌側継手を第１の配管部材側に延設して窓部を設けている。配管継手を第２の配管部材に装着する際に、配管継手の係止部を窓部に係合させることによって、軸方向に発生する負荷を、配管継手の係止部だけでなく雌側継手の延設筒部とともに受けることができることから、配管継手の係止部にかかる疲労を低減して配管継手の長寿命化を測ることができる。
【００２７】
【発明の実施の形態】
以下、本発明の一実施形態を図面に基づいて説明する。
【００２８】
第１の形態の配管継手は、図１〜３に示すように、雄側継手を有する第１配管部材２を、雌側継手を有する第２の配管部材３に挿入して接続し、第１の配管部材２の先端部に装着した配管継手（以下、係止部材という。）１０で第２の配管部材３を第１の配管部材２側に係止するように構成されている。
【００２９】
第１の配管部材２は、冷媒を流通するために筒状に形成され、挿入側先端部が筒部２１より拡径された雄側の継手部２２として形成されている。継手部２２には、Ｏリング５が嵌入される溝２３が形成されるとともに、溝２３の反先端部側に膨拡部２４が形成され、膨拡部２４の前部に先端側に向かって小径となるテーパ外面２５が形成され、膨拡部２４の後部に配置される筒部２１と膨拡部２４との段差面が係止部材１０の係止部と係止する係止面２６として形成されている。
【００３０】
第２の配管部材３は、冷媒を流通するために筒状に形成され、挿入側先端部が筒部３１より拡径された雌側の継手部３２として形成されている。継手部３２には第１の配管部材２の継手部２２を内嵌する挿入口３３と、第１の配管部材２のテーパ外面２５に当接するテーパ内面３４を有する挿入口先端膨拡部３５を備えている。さらに、継手部３３の後端面は、係止部材１０の第１係止部１４、あるいは第２の係止部１５の内壁面に係合可能な係合面３６として形成されている。
【００３１】
係止部材１０は、樹脂製の材料、また金属材料、あるいは樹脂製の材料と金属材料を混合させて一体的に成形して軸方向及び径方向に弾性を有して形成され、図４〜７に示すように、実施形態では、第１の配管部材２の外周面に装着するように薄肉リング状に形成され、リング状の本体リング部１１の両端から、それぞれ端面を開口した溝部がそれぞれ円周上の対称位置に交互に配置されて、第1溝部１２、第２溝部１３として形成されている。
【００３２】
第１溝部１２は、図４中、本体リング部１１の右端から左端付近まで延設して形成され、右端を開口している。そして第１溝部１２は、実施形態においては、本体リング部１１の軸心に対して、対称位置に対向するように一対形成されている。
【００３３】
第２溝部１３は、第１溝部１２を本体リング部１１の軸心に対して９０°回転した位置において、図５中、本体リング部１１の左端から右端付近まで延設して形成され左端を開口している。そして第２溝部１３は、実施形態においては、本体リング部１１の軸心に対して対称位置に対向するように一対形成されている。
【００３４】
本体リング部１１の両端部における溝部が形成されていない薄肉部は、軸心に向かって突出する係止部が配置されて、それぞれ第１係止部１４と第２係止部１５とを形成している。
【００３５】
第１係止部１４は、図４に示すように、第１溝部１２が形成されていない本体リング部１１の薄肉端部１１ａから第１溝部１２を挟んで両側に一組配置されるとともに、軸心に向かって突出して対称位置に対向するように一組の係止部１４が一対形成されている。第1係止部１４の内周面は、直線部１４ａと直線部１４ａから端面に向かって大径となるテーパ面部１４ｂとを形成している。
【００３６】
第２係止部１５は第２溝部１３が形成されていない本体リング部１１の薄肉端部１１ｂから第２溝部１３を挟んで両側に一組配置されるとともに、軸心に向かって突出してそれぞれ対称位置に対向するように一組の係止部１５が一対形成されている。第２係止部１５の内周面は、直線部１５ａと直線部１５ａから端面に向かって大径となるテーパ面部１５ｂとを形成している。
【００３７】
なお、第１溝部１２あるいは第２溝部１３は、円周上に２箇所でなく、軸心に対して等間隔であれば３箇所以上形成されていてもよく、また、第１係止部１４あるいは第２係止部１５も溝部を挟んだ一組が２箇所でなくても、溝部に対応して３箇所以上でもよい。
【００３８】
次に、上記のように構成された配管継手構造を構成する手順を図１及び図８〜９に基づいて説明する。
【００３９】
図８に示すように、係止部材１０は、一方の第２係止部１５の内壁面を第１の配管部材２の膨拡部２４の後端係止面２６に当接するとともに、第２係止部１５の直線部１５ａを筒部２１の外周面に係合するように装着している。この係止部材１０を第１の配管部材２に装着する場合は、本体リング部１１の第２係止部１５側の第２溝部１２が形成されていない薄肉端部１１ｂを拡径して開くことによって、係止部材１０を容易に第１の配管部材２の継手部２２に装着することができる。
【００４０】
この状態で、第２の配管部材３の継手部３２を、第１の配管部材２の継手部２２に対向する位置に配置させると、係止部材１０の第１係止部１４が第２の配管部材３の継手部３２に対向する位置に配置されることになる。
【００４１】
次に、図９に示すように、係止部材１０を装着した第１の配管部材２を第２の配管部材３、あるいは第２の配管部材３を第１の配管部材２に進入させて両者を接続させる際、第２の配管部材３の継手部３２における先端膨拡部３５が、係止部材１０の第１係止部１４に当接することによって、第２の配管部材３の先端膨拡部３５が、係止部材１０の第１係止部１４のテーパ面部１４ｂを押圧することになり、第１係止部１４を、第２係止部１５の内側端部から薄肉端部１１ｂを中心にして拡径する方向に撓ませる。
【００４２】
第２の配管部材３の先端膨拡部３５がさらに係止部材１０内をさらに進入することによって、先端膨拡部３５は、本体リング部１１の内周面に沿って薄肉部を押圧しながら移動しつつ、第１の配管部材２の継手部２２を第２の配管部材３の挿入口３３に収納する。
【００４３】
第２の配管部材３の先端膨拡部３５が、さらに進入して第１の配管部材２の膨拡部２４に形成されたテーパ外面２５に、第２の配管部材３における先端膨拡部３５の内周面に形成されたテーパ内面３４が当接すると、図１に示すように、第１係止部１４は、弾性復帰して、第１係止部１４の内壁面が第２の配管部材３の継手部２２の係合面３６に係合するとともに、直線部１４ａが第２の配管部材３の一般部外周面（筒部３１）に係合する。
【００４４】
なお、上記の係止部材１０は、第１溝部１２と第２溝部１３とが軸心に対して９０°位相がずれた位置に形成されて、それぞれ反対側の端部に向かって延設していることから、係止部材１０を左右逆方向に配置して、第１の配管部材２に装着したとしても、第２係止部１５が、第２の配管部材３を挿入するにあたっては、前述の第１係止部１４と同様の作用を行うこととなって、何等支障を起こすことなく第２の配管部材３を第１の配管部材２に挿入することができ、前述の作用と同様に行うことができる。
【００４５】
従って、実施形態の係止部材１０を使用して第１の配管部材２と第２の配管部材３とを接続させれば、係止部材１０の一方の端部に配置された第１係止部１４あるいは第２係止部１５が、第１溝部１２あるいは第２溝部１３の形成によって、第２の配管部材３の挿入時に、拡径・縮径できるように形成されることから、ワンタッチで第２の配管部材３を第１の配管部材２に接続することができる。また、本体リング１１の薄肉部は、軸方向及び径方向に弾性力を有していることから、係止部材１０の第１係止部１４が第２の配管部材３における継手部３２後面の係合面３６及び一般部外周面３１に係合する際、第２の配管部材３ときつく嵌合するとともに第１の配管部材２側に押圧することができることから、第２の配管部材３の第１の配管部材２からの脱着を防止することができる。
【００４６】
なお、本発明の配管継手は、上記の形態に限定するものではなく、例えば、第２の形態として係止部材１０を第２の配管部材３に装着して第１の配管部材２を第２の配管部材３に挿入して接続することもできる。
【００４７】
この場合、図１０に示すように、係止部材１０は、一方の第１係止部１４の内壁面を第２の配管部材３の継手部３２の後端係合面３６に当接するとともに、係止部１４の直線部１４ａを筒部３１の外周面に係止するように装着している。この係止部材１０を第２の配管部材２に装着する場合は、本体リング部１１の係止部１４側の第２溝部１３が形成されていない薄肉端部１１ａを拡径して開くことによって、係止部材１０を容易に第２の配管部材３の継手部３２に装着することができる。
【００４８】
この状態で、第１の配管部材２の継手部２２を、第２の配管部材３の継手部３２に対向する位置に配置させると、係止部材１０の第１係止部１５が第１の配管部材２の継手部２２に対向する位置に配置されることになる。
【００４９】
次に、図１１に示すように、係止部材１０を装着した第２の配管部材３を第１の配管部材２あるいは第１の配管部材２を第２の配管部材３に進入させて両者を接続すると、第１の配管部材２の継手部２２における先端部が第２の配管部材３の挿入口３３内に収納され、さらに第１の配管部材２の継手部２２が第２の配管部材３の挿入口３３内に進入する際、第１の配管部材２の膨拡部２４が係止部材１０の第２係止部１５のテーパ面部１５ｂを押圧することによって、第２係止部１５を、第１係止部１４の内側端部から薄肉端部１１ａを中心にして拡径する。
【００５０】
そして、図１２に示すように、第１の配管部材２における膨拡部２４に形成されたテーパ外面２５が、第２の配管部材３の先端膨拡部３５の内面に形成されたテーパ内面３４に当接すると、第１係止部１５は、弾性復帰して、第２係止部１５の内壁面が第１の配管部材３の膨拡部２４に形成された後端係止面２６に係合するとともに、直線部１５ａが第１の配管部材２の一般部外周面（筒部２１）に係止する。
【００５１】
従って、第１の形態または第２の形態の係止部材１０を第１の配管部材あるいは第２の配管部材のいずれかに装着して第１の配管部材２と第２の配管部材３とを接続させれば、係止部材１０の一方の端部に配置された第１係止部１４あるいは第２係止部１５が、第１溝部１２あるいは第２溝部１３の形成によって、第２の配管部材３の挿入時に、拡径・縮径できるように形成されることから、ワンタッチで第２の配管部材３を第１の配管部材２に接続することができる。また、本体リング１１の薄肉部は、軸方向及び径方向に弾性力を有していることから、係止部材１０の第２係止部１５が第１の配管部材２の継手部２２における後端係止部２６及び一般部外周面２１に係合する際、第１の配管部材２ときつく嵌合するとともに第２の配管部材３側に押圧することができることから、第１の配管部材２の第２の配管部材３からの脱着を防止することができる。
【００５２】
さらに、係止部材１０は、左右方向に逆に装着しても、同様に作用できることから、誤組付を起こさずに第２の配管部材３を第１の配管部材２にワンタッチで接続させることができる。
【００５３】
また、第３の形態では、図１３〜１５に示すように第２の配管部材３Ａに、先端膨拡部３５Ａから前方に延設した延設筒部３７を設け、延設筒部３７に軸心に対して対向する位置に一対の窓部３８・３８を形成して、係止部材１０の第２係止部１５を挿入可能に形成することもできる。延設筒部３７の外径は第１の形態における先端膨拡部３５の外径と略同径に形成されている。
【００５４】
この第２の配管部材３Ａに係止部材１０を装着した状態で、第１の配管部材２を挿入して接続すると、図１０〜１２で説明した作用と同様の作用により第１の配管部材２を第２の配管部材３に挿入して接続することができる。
【００５５】
つまり、図１３に示すように、第１の配管部材２の継手部２２を第２の配管部材３Ａの延設筒部３７に対向する位置に配置させた後、図１４に示すように、係止部材１０を装着した第２の配管部材３Ａを第１の配管部材２あるいは第１の配管部材２を第２の配管部材３に進入させて両者を接続すると、第１の配管部材２の継手部２２における先端部が第２の配管部材３の挿入口３３内に収納され、さらに第１の配管部材２の継手部２２が第２の配管部材３の挿入口３３内に進入する際、第１の配管部材２の膨拡部２４が係止部材１０の第２係止部１５のテーパ面部１５ｂを押圧することによって、第２係止部１５を、第１係止部１４の内側端部から薄肉端部１１ａを中心にして拡径して第２係止部１５を窓部３８から脱着させる。
【００５６】
そして、図１５に示すように、第１の配管部材２における膨拡部２４に形成されたテーパ外面２５が、第２の配管部材３の先端膨拡部３５の内面に形成されたテーパ内面３４に当接すると、第１係止部１５は、弾性復帰して、延設筒部３７の窓部３８内に進入して第２係止部１５の内壁面が第１の配管部材３の膨拡部２４に形成された後端係止面２６に係合するとともに、直線部１５ａが第１の配管部材２の一般部外周面（筒部２１）に係止する。
【００５７】
係止部材１０の第２係止部１５は、第２の配管部材３Ａの延設筒部３７に形成された窓部３８に支持されることとなって、軸方向を拘束されて第１の配管部材２を第２の配管部材３に固定される。
【００５８】
この形態によって、係止部材１０の第２係止部１５は、第１の配管部材２の膨拡部２４を第２の配管部材３Ａ側に付与する力の反力を第２の配管部材３Ａの延設筒部３７とともに受けることになるから、係止部材１０の疲労を少なくして係止部材１０の長寿命化を図ることができる。
【００５９】
また、図１６に示すように、第３の形態における第２の配管部材３Ａの継手部３２Ａの外周面を小径にして、係止部材１０の第２係止部１５の拡径量を小さくすることもできる。この場合、第１の配管部材２Ａの継手部２２Ａを筒部２１の外径より僅かに大きく形成して前述の形態の膨拡部２４を削除する。そして、第１の配管部材２Ａの継手部２２Ａに膨拡部がなくなった分、第２の配管部材３Ｂの継手部３２Ｂを前述の形態より小径となって延設筒部３７Ｂを含めてストレート状に形成する。延設筒部３７Ｂには窓部３８Ｂが形成され、第２の配管部材３Ｂの継手部３２Ｂ端面に第１係止部１４が係止されている係止部材１０の第２係止部１５が窓部３８Ｂに挿入可能に構成される。
【００６０】
この形態によって、係止部材１０の第２係止部１５の拡径量を小さくすることができ、係止部材１０の疲労を少なくして長寿命化を図ることができるとともに、第１の配管部材２Ａと第２の配管部材３Ｂとの外径が小さくなることによる加工工数を低減してコスト低減を図ることができる。
【００６１】
さらに図１７に示すように、係止部材１０の第１係止部１４及び第２係止部１５の内周面（直線部１４ａ、１５ａ）の内径を、第１配管部材２の継手部２２に装着したＯリング５の外径より大きく形成して、係止部材１０を第２の配管部材３Ｃに装着する際に、第１係止部１４又は第２係止部１５の内周面でＯリング５を擦らずに挿入することができる。この場合、第１の配管部材２の継手部２２の外径を筒部２１と同径かそれより小さく形成することによって行われ、必要に応じては、第２の配管部材３Ｃの継手部３２Ｃの肉厚を前述の形態の継手部３２または３２Ｂより厚く形成することとなる。これによって、Ｏリング５の損傷を防止することができる。
【００６２】
また、係止部材１０の第１係止部１４（又は第２係止部１５）における直線部１４ａ（または１５ａ）の内径を筒部２１の外径より小さく形成すれば、第１係止部１４（又は第２係止部１５）が第１の配管部材２あるいは第２の配管部材３に係止する際にきつく嵌合できて、第１の配管部材２と第２の配管部材とをがたつきのない状態で固定することができる。
【図面の簡単な説明】
【図１】本発明の第１の形態による配管継手構造を示す一部断面図である。
【図２】図１におけるＡ矢視図である。
【図３】図１におけるＢ矢視図である。
【図４】図１における配管継手としての係止部材を示す一部断面図である。
【図５】図４におけるＤ矢視図である。
【図６】図４におけるＣ−Ｃ断面図である。
【図７】図４におけるＥ矢視図である。
【図８】第２の配管部材を第１の配管部材に挿入する作用を示す一部断面図である。
【図９】第２の配管部材を第１の配管部材への挿入作用を示す一部断面図である。
【図１０】第２の形態における第１の配管部材を第２の配管部材に挿入する作用を示す一部断面図である。
【図１１】同第２の配管部材を第１の配管部材への挿入作用を示す一部断面図である。
【図１２】同第１の配管部材と第２の配管部材が接続した状態を示す一部断面図である。
【図１３】第３の形態における第１の配管部材を第２の配管部材に挿入する作用を示す一部断面図である。
【図１４】同第２の配管部材を第１の配管部材への挿入作用を示す一部断面図である。
【図１５】同第１の配管部材と第２の配管部材が接続した状態を示す一部断面図である。
【図１６】図１５における第２の配管部材の継手部の別の形態を示す一部断面図である。
【図１７】図１５における配管継手構造の別の形態を示す一部断面図である。
【図１８】従来の配管継手構造を示す一部断面図である。
【図１９】従来のさらに別の配管継手構造を示す一部断面図である。
【符号の説明】
２第１の配管部材
３、３Ａ第２の配管部材
５Ｏリング
１０係止部材
１１本体リング部
１２第１溝部
１３第２溝部
１４第１係止部
１４ａ直線部（直線係合部）
１４ｂテーパ面部
１５第２係止部
１５ａ直線部（直線係合部）
２２継手部
２４膨拡部
２５テーパ外面
２６係止面
３２、３２Ａ継手部
３３挿入口
３４テーパ内面
３６係合面
３７延設筒部
３８窓部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a piping joint suitable for connecting a fluid piping member, for example, a refrigerant piping member of a refrigeration cycle.
[0002]
[Prior art]
Generally, in a pipe joint for connecting refrigerant pipe members for a refrigeration cycle, when connecting a first pipe member as a male side joint and a second pipe member as a female side joint, the number of parts of the pipe joint is reduced. Therefore, it has been cited as an issue to make the piping work easy or to prevent erroneous assembly. For example, in a conventional pipe joint, it is used for a pipe joint used in a pipe joint structure (Patent Document 1) as shown in FIG. 18 or a pipe joint structure (Patent Document 2) as shown in FIG. There are known pipe joints.
[0003]
In the former pipe joint shown in Patent Document 1, after connecting the first pipe member 100 having the flange 101 that expands from the outer peripheral surface of the pipe and the second pipe member 105 having the tapered outer surface 106. Thus, the first fixing member 110 and the second fixing member 115 as pipe joints for fixing both the piping members 100 and 105 are configured to cover the first piping member 100 and the second piping member 105, respectively. Has been. The first fixing member 110 is formed in a cylindrical shape and includes a spiral protruding portion 111 inside, and the second fixing member 115 is formed in a cylindrical shape and can be engaged with the protruding portion 111. Part 116 is provided. Then, after the first piping member 100 is inserted into the second piping member 105, the claw portion 116 is engaged with the protrusion 111 by rotating the second fixing member 115 relative to the first fixing member 110. As a result, the first fixing member 110 and the second fixing member 115 are locked, and accordingly, the hook engaging portion 112 formed at the tip of the cylindrical portion of the first fixing member 110 is the first fixing member 110. The first piping member 100 and the second piping member are pressed by pressing the flange portion 101 of the piping member 100 and the tapered inner surface 117 of the second fixing member 115 pressing the tapered outer surface 106 of the second piping member 105. 105 can be connected.
[0004]
In the latter pipe joint structure shown in Patent Document 2, when connecting the pipe member 120 having the annular protrusion 122 at the insertion part 121 to the insertion receptacle 126 of the female side joint 125, a part of the circumference is pivoted. By fitting a ring-shaped fixing member 130 cut out along the direction between the two, the attachment and detachment of the piping member 120 in the axial direction is restricted. The fixing member 130 is formed as an elastic stopper having elasticity in the circumferential direction, and includes an arcuate ridge 131 that fits into a groove 127 formed in the circumferential direction at the insertion receiving port 126 of the female side joint 125. When the piping member 120 is inserted into the insertion receiving port 126 of the female side joint 125 and the tip surface of the annular projection 122 abuts on the receiving surface 128 of the female side joint 125, the arcuate ridge 131 causes the annular projection 122 to become female. It arrange | positions so that it may clamp between the receiving surfaces 128 of the side coupling 125. FIG.
[0005]
Accordingly, the arcuate ridge 131 is inserted into the groove 127 formed in the insertion receiving port 126 of the female joint 125 and restricts the rearward movement of the annular protrusion 122, whereby the female joint 125 of the piping member 120 is regulated. Desorption from can be prevented. Moreover, since a part of the circumference of the fixing member 130 is cut out along the axial direction, the fixing member 130 has elasticity in the circumferential direction, so that the arc-shaped ridge 131 can be easily inserted into the groove 127 of the insertion receptacle 126. Can be fitted.
[0006]
[Patent Document 1]
JP-A-7-332563 (pages 4-5, FIG. 1)
[Patent Document 2]
Japanese Patent Laid-Open No. 8-200277 (pages 3 to 6, FIG. 1)
[0007]
[Problems to be solved by the invention]
However, among the pipe joints shown in the conventional publication, in the former case, the first fixing member 110 and the second fixing member 115 are manufactured separately from the first piping member 100 and the second piping member 105. Since the projections 111 and the claw portions 116 are respectively provided and engaged with each other, the number of parts increases, and the molding cost and assembly work cost of both the fixing members 110 and 115 are increased. It was.
[0008]
In the latter case, since the fixing member 130 as a pipe joint has directionality when attached, the contact portion between the pipe member 120 and the female side joint 125 does not necessarily match when fitted in the left-right reverse direction. Not limited to this, there is a possibility that a gap may be formed at the contact portion of each other or the assembly may be impossible.
[0009]
Accordingly, the present invention solves the above-described problems, and aims to provide a pipe joint that facilitates assembly and does not cause erroneous assembly, as well as reducing costs.
[0010]
[Means for Solving the Problems]
In order to solve the above-described problems, a pipe joint according to the present invention has a cylindrical shape in the pipe joint for connecting and fixing the first pipe member and the second pipe member. A plurality of first groove portions and second groove portions are alternately formed from both ends of the formed main body at equal intervals, Formed between the first groove portions or between the second groove portions. The thin end portions at both ends of the main body are provided with locking portions that can be locked with the first piping member or the second piping member.
[0011]
Since the end surfaces of the first groove portion and the second groove portion are opened, the pipe joint attached to the first pipe member or the second pipe member is inserted when any of the pipe members on the insertion side is inserted. In addition, when the thin-walled portion comes into contact with the insertion portion of any piping member, the diameter is increased and any piping member can be inserted.When the insertion of any piping member is completed, the elastic restoring force is applied to any piping member. It will be locked by the locking part.
[0012]
Therefore, since either the first piping member or the second piping member can be inserted and fixed to the mating piping member with one touch, the assembling work can be easily performed in a short time. Moreover, since the same groove and locking parts are formed on both the left and right ends of the pipe joint, even if it is mounted in the left and right direction, it will not interfere with the assembly and will cause incorrect assembly. Absent.
[0013]
In the invention according to claim 2, the pipe joint for connecting and fixing the first pipe member and the second pipe member is a pair of the first pipes alternately from both ends of the cylindrical body. The groove and the second groove are formed at positions facing the axis, Formed between the first groove portions or between the second groove portions. Thin part end Are provided with a pair of locking portions that can be locked with the first piping member or the second piping member.
[0014]
That is, in this invention, the virtual straight line connecting the center lines of the groove portions formed at the respective end portions is formed in a cross shape on the left end side and the right end side.
[0015]
Since the end surfaces of the first groove portion and the second groove portion are opened, the pipe joint attached to the first pipe member or the second pipe member is inserted when any of the pipe members on the insertion side is inserted. In addition, when the thin-walled portion comes into contact with the insertion portion of any piping member, the diameter is increased and any piping member can be inserted.When the insertion of any piping member is completed, the elastic restoring force is applied to any piping member. It will be locked by the locking part.
[0016]
Accordingly, since either the first piping member or the second piping member can be inserted and fixed to the mating piping member with one touch, the assembly work can be easily performed in a short time as in the first aspect of the invention. It can be carried out. In addition, since the same groove and locking portions are formed on the left and right ends of the pipe joint, even if the pipe joint is mounted in the left and right direction, the assembly is not hindered and no erroneous assembly occurs.
[0017]
In the invention described in claim 3, when the first piping member or the second piping member is inserted, the locking portion in the invention described in claim 1 or 2 is the first piping member or the second piping member. When contacted, the diameter is increased by being guided by the tapered surface portion formed in the first locking portion or the second locking portion, and when the insertion portion of the first piping member or the second piping member exceeds the tapered surface portion, The first locking portion or the second locking portion is reduced in diameter by the elastic restoring force and locked to the outer peripheral surface of the first piping member or the second piping member.
[0018]
Therefore, the first piping member and the second piping member can be assembled with one touch, and the assembling work can be performed in a short time.
[0019]
In the invention according to claim 4, since the thin portion is formed of an elastic material having elasticity in the axial direction and the radial direction, the pipe joint is in close contact with the outer peripheral surface of the first pipe member or the second pipe member. Thus, it can be locked and the sealing performance is improved, and the operation described in claim 3 can be smoothly performed without causing damage to the thin-walled portion.
[0020]
In the invention of claim 5, when the first piping member or the second piping member is inserted into the pipe joint, the outer diameter of the seal member mounted on the first piping member or the second piping member is In the natural state, the first pipe member and the second pipe member can be connected without damaging the outer peripheral surface of the seal member because it is formed smaller than the inner diameter of the thin portion of the pipe joint.
[0021]
In the invention described in claim 6, when the first piping member or the second piping member is inserted into the pipe joint, the inner diameter of the thin portion of the pipe joint in the natural state is the first piping member or the second piping. Since the outer diameter of the member is smaller than the outer diameter of the member, when the first piping member or the second piping member is locked by the elastic restoring force of the thin portion, the first piping member or the second piping member The backlash with the outer peripheral surface can be absorbed and the sealing performance can be improved.
[0022]
The invention according to claim 7 is a pipe joint structure in which the first pipe member and the second pipe member are connected by a pipe joint, and the first pipe member and the second pipe member are connected and fixed. In the joint, a plurality of first groove portions and second groove portions are alternately formed at equal intervals from both ends of the cylindrically formed main body, Formed between the first groove portions or between the second groove portions. Thin part end Is provided with a locking portion that can be locked with the first piping member or the second piping member.
[0023]
Since the end surfaces of the first groove portion and the second groove portion are opened, the pipe joint attached to the first pipe member or the second pipe member is inserted when any of the pipe members on the insertion side is inserted. In addition, when the thin-walled portion comes into contact with the insertion portion of any piping member, the diameter is increased and any piping member can be inserted.When the insertion of any piping member is completed, the elastic restoring force is applied to any piping member. It will be locked by the locking part.
[0024]
Therefore, since either the first piping member or the second piping member can be inserted and fixed to the mating piping member with one touch, the assembling work can be easily performed in a short time. Moreover, since the same groove and locking parts are formed on both the left and right ends of the pipe joint, even if it is mounted in the left and right direction, it will not interfere with the assembly and will cause incorrect assembly. Absent.
[0025]
In the invention according to claim 8, since the first piping member and the second piping member according to the invention according to claim 7 are brought into contact with each other by the tapered surfaces, they are connected and fixed by a pipe joint. In this state, since the pipe joint is formed with elasticity in the axial direction, the tapered surfaces are brought into pressure contact with each other, so that contact can be made in a wide range and the sealing performance can be improved.
[0026]
Furthermore, in the ninth aspect of the present invention, the female side joint of the second piping member according to the seventh aspect of the invention is extended to the first piping member side to provide a window portion. When the piping joint is mounted on the second piping member, by engaging the locking portion of the piping joint with the window portion, the load generated in the axial direction is not only the locking portion of the piping joint but also the female-side joint. Therefore, it is possible to reduce the fatigue applied to the engaging portion of the pipe joint and to increase the life of the pipe joint.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0028]
As shown in FIGS. 1 to 3, the pipe joint of the first embodiment is configured such that the first pipe member 2 having a male side joint is inserted and connected to the second pipe member 3 having a female side joint. The second piping member 3 is configured to be locked to the first piping member 2 side by a pipe joint (hereinafter referred to as a locking member) 10 attached to the distal end portion of the piping member 2.
[0029]
The first piping member 2 is formed in a cylindrical shape so as to circulate the refrigerant, and is formed as a male-side joint portion 22 whose insertion-side distal end portion has a diameter larger than that of the cylindrical portion 21. In the joint portion 22, a groove 23 into which the O-ring 5 is inserted is formed, and an expanded portion 24 is formed on the side opposite to the distal end portion of the groove 23. A tapered outer surface 25 having a small diameter is formed, and a stepped surface between the cylindrical portion 21 and the expanded portion 24 disposed at the rear portion of the expanded portion 24 is used as a locking surface 26 that locks the locking portion of the locking member 10. Is formed.
[0030]
The second piping member 3 is formed in a cylindrical shape for circulating the refrigerant, and is formed as a female-side joint portion 32 having a distal end portion on the insertion side whose diameter is larger than that of the cylindrical portion 31. The joint portion 32 includes an insertion port 33 into which the joint portion 22 of the first piping member 2 is fitted, and an insertion port distal end expanding portion 35 having a tapered inner surface 34 that contacts the tapered outer surface 25 of the first piping member 2. I have. Further, the rear end surface of the joint portion 33 is formed as an engagement surface 36 that can be engaged with the first locking portion 14 of the locking member 10 or the inner wall surface of the second locking portion 15.
[0031]
The locking member 10 is formed of a resin material, a metal material, or a mixture of a resin material and a metal material and integrally molded to have elasticity in the axial direction and the radial direction. 7, in the embodiment, a thin ring shape is formed so as to be attached to the outer peripheral surface of the first piping member 2, and groove portions each having an open end surface are formed from both ends of the ring-shaped main body ring portion 11. The first groove portion 12 and the second groove portion 13 are formed alternately at symmetrical positions on the circumference.
[0032]
The first groove portion 12 is formed to extend from the right end of the main body ring portion 11 to the vicinity of the left end in FIG. 4 and opens at the right end. In the embodiment, a pair of the first groove portions 12 is formed so as to face the symmetrical position with respect to the axis of the main body ring portion 11.
[0033]
The second groove portion 13 is formed by extending from the left end of the main body ring portion 11 to the vicinity of the right end in FIG. 5 at a position where the first groove portion 12 is rotated 90 ° with respect to the axis of the main body ring portion 11. It is open. In the embodiment, a pair of the second groove portions 13 is formed so as to face the symmetrical positions with respect to the axis of the main body ring portion 11.
[0034]
The thin portions where the groove portions at both ends of the main body ring portion 11 are not formed are provided with the locking portions protruding toward the axial center to form the first locking portion 14 and the second locking portion 15, respectively. is doing.
[0035]
As shown in FIG. 4, the first locking portion 14 is disposed on both sides of the first groove portion 12 from the thin end portion 11a of the main body ring portion 11 where the first groove portion 12 is not formed. A pair of locking portions 14 is formed so as to protrude toward the axial center and face the symmetrical position. The inner peripheral surface of the first locking portion 14 forms a straight portion 14a and a tapered surface portion 14b having a larger diameter from the straight portion 14a toward the end surface.
[0036]
The second locking portions 15 are arranged on both sides of the second groove portion 13 from the thin end portion 11b of the main body ring portion 11 where the second groove portion 13 is not formed, and project toward the axial center, respectively. A pair of locking portions 15 is formed so as to face the symmetrical position. The inner peripheral surface of the second locking portion 15 forms a straight portion 15a and a tapered surface portion 15b having a larger diameter from the straight portion 15a toward the end surface.
[0037]
Note that the first groove portion 12 or the second groove portion 13 is not formed at two locations on the circumference, but may be formed at three or more locations as long as they are equidistant from the axial center. Or the 2nd latching | locking part 15 may be three or more places corresponding to a groove part, even if the set which pinched | interposed the groove part is not two places.
[0038]
Next, a procedure for configuring the pipe joint structure configured as described above will be described with reference to FIGS. 1 and 8 to 9.
[0039]
As shown in FIG. 8, the locking member 10 abuts the inner wall surface of one second locking portion 15 against the rear end locking surface 26 of the expanded portion 24 of the first piping member 2, and the second The linear portion 15 a of the locking portion 15 is mounted so as to engage with the outer peripheral surface of the cylindrical portion 21. When this locking member 10 is attached to the first piping member 2, the thin end portion 11 b where the second groove portion 12 on the second locking portion 15 side of the main body ring portion 11 is not formed is expanded and opened. Thus, the locking member 10 can be easily attached to the joint portion 22 of the first piping member 2.
[0040]
In this state, when the joint portion 32 of the second piping member 3 is disposed at a position facing the joint portion 22 of the first piping member 2, the first locking portion 14 of the locking member 10 becomes the second. It will be arranged at a position facing the joint part 32 of the piping member 3.
[0041]
Next, as shown in FIG. 9, the first piping member 2 fitted with the locking member 10 is moved into the second piping member 3 or the second piping member 3 is advanced into the first piping member 2. Is connected, the tip expansion portion 35 of the joint portion 32 of the second piping member 3 is brought into contact with the first locking portion 14 of the locking member 10, thereby expanding the tip of the second piping member 3. The portion 35 presses the tapered surface portion 14b of the first locking portion 14 of the locking member 10, so that the first locking portion 14 is moved from the inner end portion of the second locking portion 15 to the thin end portion 11b. Bend in the direction of increasing the diameter around the center.
[0042]
When the tip expanded portion 35 of the second piping member 3 further enters the locking member 10, the tip expanded portion 35 presses the thin portion along the inner peripheral surface of the main body ring portion 11. The joint portion 22 of the first piping member 2 is accommodated in the insertion port 33 of the second piping member 3 while moving.
[0043]
The tip expanded portion 35 of the second piping member 3 further enters the tapered outer surface 25 formed in the expanded portion 24 of the first piping member 2 by entering the distal expanded portion 35 of the second piping member 3. When the taper inner surface 34 formed on the inner peripheral surface of the first contact portion 14 abuts, as shown in FIG. 1, the first locking portion 14 is elastically restored, and the inner wall surface of the first locking portion 14 is the second pipe. While engaging with the engaging surface 36 of the joint part 22 of the member 3, the linear part 14a engages with the general outer peripheral surface (cylinder part 31) of the second piping member 3.
[0044]
The locking member 10 is formed such that the first groove portion 12 and the second groove portion 13 are formed at positions where the phase of the first groove portion 12 and the second groove portion 13 are shifted from each other by 90 ° with respect to the axial center. Therefore, even when the locking member 10 is arranged in the left and right reverse direction and attached to the first piping member 2, the second locking portion 15 inserts the second piping member 3 Since the same operation as the first locking portion 14 described above is performed, the second piping member 3 can be inserted into the first piping member 2 without causing any trouble. Can be done.
[0045]
Therefore, if the 1st piping member 2 and the 2nd piping member 3 are connected using the locking member 10 of embodiment, the 1st locking arrange | positioned at one edge part of the locking member 10 will be described. Since the portion 14 or the second locking portion 15 is formed so that the diameter can be increased or reduced when the second piping member 3 is inserted by the formation of the first groove portion 12 or the second groove portion 13, with one touch. The second piping member 3 can be connected to the first piping member 2. Moreover, since the thin part of the main body ring 11 has elastic force in the axial direction and the radial direction, the first locking part 14 of the locking member 10 is connected to the rear surface of the joint part 32 in the second piping member 3. When engaging with the engagement surface 36 and the outer peripheral surface 31 of the general portion, the second piping member 3 can be fitted tightly and pressed to the first piping member 2 side. Desorption from the first piping member 2 can be prevented.
[0046]
In addition, the piping joint of this invention is not limited to said form, For example, the latching member 10 is attached to the 2nd piping member 3 as a 2nd form, and the 1st piping member 2 is 2nd. It can also be inserted into the piping member 3 and connected.
[0047]
In this case, as shown in FIG. 10, the locking member 10 abuts the inner wall surface of the first locking portion 14 on the rear end engaging surface 36 of the joint portion 32 of the second piping member 3, The linear portion 14 a of the locking portion 14 is mounted so as to be locked to the outer peripheral surface of the cylindrical portion 31. When this locking member 10 is attached to the second piping member 2, the thin end portion 11 a where the second groove portion 13 on the locking portion 14 side of the main body ring portion 11 is not formed is expanded and opened. The locking member 10 can be easily attached to the joint portion 32 of the second piping member 3.
[0048]
In this state, when the joint portion 22 of the first piping member 2 is arranged at a position facing the joint portion 32 of the second piping member 3, the first locking portion 15 of the locking member 10 is the first. It will be arranged at a position facing the joint portion 22 of the piping member 2.
[0049]
Next, as shown in FIG. 11, the second piping member 3 fitted with the locking member 10 is caused to enter the first piping member 2 or the first piping member 2 into the second piping member 3, and both When connected, the distal end portion of the joint portion 22 of the first piping member 2 is accommodated in the insertion port 33 of the second piping member 3, and the joint portion 22 of the first piping member 2 is further connected to the second piping member 3. When the expansion portion 24 of the first piping member 2 presses the tapered surface portion 15b of the second locking portion 15 of the locking member 10 when entering the insertion port 33, the second locking portion 15 is moved. The diameter is increased from the inner end portion of the first locking portion 14 around the thin end portion 11a.
[0050]
Then, as shown in FIG. 12, the tapered outer surface 25 formed on the expanded portion 24 of the first piping member 2 is the tapered inner surface 34 formed on the inner surface of the distal end expanded portion 35 of the second piping member 3. The first locking portion 15 is elastically restored, and the inner wall surface of the second locking portion 15 is brought into contact with the rear end locking surface 26 formed in the expanded portion 24 of the first piping member 3. While engaging, the linear part 15a latches to the general outer peripheral surface (cylinder part 21) of the first piping member 2.
[0051]
Therefore, the first piping member 2 and the second piping member 3 are mounted by attaching the locking member 10 of the first or second configuration to either the first piping member or the second piping member. If the connection is made, the first locking portion 14 or the second locking portion 15 arranged at one end of the locking member 10 is formed into the second pipe by forming the first groove portion 12 or the second groove portion 13. Since it is formed so that the diameter can be increased or decreased when the member 3 is inserted, the second piping member 3 can be connected to the first piping member 2 with one touch. Moreover, since the thin part of the main body ring 11 has an elastic force in the axial direction and the radial direction, the second locking part 15 of the locking member 10 is located behind the joint part 22 of the first piping member 2. When engaging the end locking portion 26 and the outer peripheral surface 21 of the general portion, the first piping member 2 can be tightly fitted and pressed toward the second piping member 3 side, so that the first piping member 2 can be pressed. Desorption from the second piping member 3 can be prevented.
[0052]
Further, since the locking member 10 can operate in the same manner even if it is mounted reversely in the left-right direction, the second piping member 3 can be connected to the first piping member 2 with one touch without causing erroneous assembly. Can do.
[0053]
Further, in the third embodiment, as shown in FIGS. 13 to 15, the second pipe member 3 A is provided with an extended cylinder part 37 extending forward from the tip expanded part 35 A, and the extended cylinder part 37 has a shaft. It is also possible to form the pair of window portions 38 at positions facing the heart so that the second locking portion 15 of the locking member 10 can be inserted. The outer diameter of the extended cylindrical portion 37 is formed to be substantially the same as the outer diameter of the tip expanding portion 35 in the first embodiment.
[0054]
When the first piping member 2 is inserted and connected in a state where the locking member 10 is attached to the second piping member 3A, the first piping member 2 is operated by the same operation as that described with reference to FIGS. Can be inserted and connected to the second piping member 3.
[0055]
That is, as shown in FIG. 13, after the joint portion 22 of the first piping member 2 is arranged at a position facing the extended cylindrical portion 37 of the second piping member 3A, as shown in FIG. When the second piping member 3A fitted with the stop member 10 is inserted into the first piping member 2 or the first piping member 2 and connected to each other, the joint of the first piping member 2 is connected. When the distal end portion of the portion 22 is accommodated in the insertion port 33 of the second piping member 3 and the joint portion 22 of the first piping member 2 enters the insertion port 33 of the second piping member 3, When the expanded portion 24 of the first piping member 2 presses the tapered surface portion 15b of the second locking portion 15 of the locking member 10, the second locking portion 15 is connected to the inner end of the first locking portion 14. Then, the diameter of the second locking portion 15 is increased from the window portion 38 by expanding the diameter around the thin end portion 11a.
[0056]
And as shown in FIG. 15, the taper outer surface 25 formed in the expansion part 24 in the 1st piping member 2 is the taper inner surface 34 formed in the inner surface of the front-end expansion part 35 of the 2nd piping member 3. As shown in FIG. The first locking portion 15 is elastically restored and enters the window portion 38 of the extended cylindrical portion 37 so that the inner wall surface of the second locking portion 15 is expanded by the first piping member 3. While engaging with the rear end locking surface 26 formed in the enlarged portion 24, the linear portion 15 a is locked to the outer peripheral surface (cylindrical portion 21) of the general portion of the first piping member 2.
[0057]
The second locking portion 15 of the locking member 10 is supported by the window portion 38 formed in the extended cylindrical portion 37 of the second piping member 3A, and the first direction is restrained in the axial direction. The piping member 2 is fixed to the second piping member 3.
[0058]
With this configuration, the second locking portion 15 of the locking member 10 causes the second piping member 3 A to react with a force that imparts the expansion portion 24 of the first piping member 2 to the second piping member 3 A side. Therefore, the fatigue of the locking member 10 can be reduced and the life of the locking member 10 can be extended.
[0059]
Further, as shown in FIG. 16, the outer peripheral surface of the joint portion 32A of the second piping member 3A in the third mode is made small in diameter, and the diameter expansion amount of the second locking portion 15 of the locking member 10 is reduced. You can also. In this case, the joint portion 22A of the first piping member 2A is formed slightly larger than the outer diameter of the cylindrical portion 21, and the expanded portion 24 having the above-described configuration is deleted. Then, the joint portion 32A of the second piping member 3B has a smaller diameter than that of the above-described form and includes the extended cylindrical portion 37B because the expanded portion is eliminated from the joint portion 22A of the first piping member 2A. To form. A window portion 38B is formed in the extended cylindrical portion 37B, and the second locking portion 15 of the locking member 10 in which the first locking portion 14 is locked to the end surface of the joint portion 32B of the second piping member 3B is provided. It is configured to be insertable into the window portion 38B.
[0060]
With this configuration, the diameter of the second locking portion 15 of the locking member 10 can be reduced, the fatigue of the locking member 10 can be reduced, and the life can be extended. Costs can be reduced by reducing the number of processing steps due to a decrease in the outer diameter of the member 2A and the second piping member 3B.
[0061]
Further, as shown in FIG. 17, the inner diameters of the inner peripheral surfaces (straight portions 14 a and 15 a) of the first locking portion 14 and the second locking portion 15 of the locking member 10 are set to the joint portions 22 of the first piping member 2. When the locking member 10 is mounted on the second piping member 3 C, the inner diameter of the first locking portion 14 or the second locking portion 15 is larger than the outer diameter of the O-ring 5 mounted on the inner surface. The O-ring 5 can be inserted without rubbing. In this case, it is performed by forming the outer diameter of the joint portion 22 of the first piping member 2 to be equal to or smaller than that of the cylindrical portion 21, and if necessary, the joint portion 32C of the second piping member 3C. Is formed thicker than the joint portion 32 or 32B of the above-described form. Thereby, damage to the O-ring 5 can be prevented.
[0062]
Further, if the inner diameter of the straight portion 14a (or 15a) in the first locking portion 14 (or the second locking portion 15) of the locking member 10 is smaller than the outer diameter of the tube portion 21, the first locking portion 14 (or the second locking portion 15) can be fitted tightly when locking to the first piping member 2 or the second piping member 3, and the first piping member 2 and the second piping member are connected to each other. Can be fixed without rattling.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view showing a pipe joint structure according to a first embodiment of the present invention.
FIG. 2 is a view taken in the direction of arrow A in FIG.
FIG. 3 is a view taken in the direction of arrow B in FIG. 1;
4 is a partial cross-sectional view showing a locking member as a pipe joint in FIG. 1. FIG.
5 is a view taken in the direction of arrow D in FIG. 4;
6 is a cross-sectional view taken along the line CC in FIG.
7 is a view taken in the direction of arrow E in FIG.
FIG. 8 is a partial cross-sectional view showing the operation of inserting the second piping member into the first piping member.
FIG. 9 is a partial cross-sectional view showing an operation of inserting the second piping member into the first piping member.
FIG. 10 is a partial cross-sectional view showing an operation of inserting the first piping member in the second embodiment into the second piping member.
FIG. 11 is a partial cross-sectional view showing an operation of inserting the second piping member into the first piping member.
FIG. 12 is a partial cross-sectional view showing a state where the first piping member and the second piping member are connected.
FIG. 13 is a partial cross-sectional view showing an operation of inserting the first piping member into the second piping member in the third embodiment.
FIG. 14 is a partial cross-sectional view showing the operation of inserting the second piping member into the first piping member.
FIG. 15 is a partial cross-sectional view showing a state where the first piping member and the second piping member are connected to each other.
FIG. 16 is a partial cross-sectional view showing another form of the joint portion of the second piping member in FIG. 15;
FIG. 17 is a partial cross-sectional view showing another form of the pipe joint structure in FIG. 15;
FIG. 18 is a partial cross-sectional view showing a conventional pipe joint structure.
FIG. 19 is a partial cross-sectional view showing still another conventional pipe joint structure.
[Explanation of symbols]
2 First piping member
3, 3A Second piping member
5 O-ring
10 Locking member
11 Body ring
12 First groove
13 Second groove
14 First locking portion
14a Straight line part (straight line engagement part)
14b Tapered surface
15 Second locking part
15a Straight line part (straight line engagement part)
22 Joint part
24 Expansion part
25 Taper outer surface
26 Locking surface
32, 32A Joint part
33 insertion slot
34 Tapered inner surface
36 engagement surface
37 Extended tube
38 windows

Claims

A pipe joint connecting a first pipe member arranged with a male side joint and a second pipe member arranged with a female side joint,
A plurality of first groove portions extending from the end surfaces are formed at equal intervals from the one end of the cylindrically formed main body to the axis,
At an intermediate position between the plurality of first groove portions, a plurality of second groove portions extending from an end surface opposite to the first groove portion are formed,
At both ends of the main body, locking portions that protrude toward the axial center are formed at a plurality of locations on the ends of the thin portions formed between the first groove portions or between the second groove portions,
The locking portion at the end of the thin portion formed between the first groove portions and the locking portion at the end of the thin portion formed between the second groove portions are bilaterally symmetrical with respect to the central portion in the axial direction. Formed,
A pipe joint mounted on either the first pipe member or the second pipe member.

A pipe joint connecting a first pipe member arranged with a male side joint and a second pipe member arranged with a female side joint,
A pair of first groove portions extending from the end faces are formed at positions facing the axial center from one end of the cylindrically formed main body,
At a position rotated by 90 ° with respect to the first groove portion, a pair of second groove portions extending from the end surface opposite to the first groove portion are formed,
At both ends of the main body, at the positions where the locking portions protruding toward the shaft center are opposed to the shaft center at the thin-walled portion ends formed between the first groove portions or between the second groove portions. A pair is formed,
The locking portion at the end of the thin portion formed between the first groove portions and the locking portion at the end of the thin portion formed between the second groove portions are bilaterally symmetrical with respect to the central portion in the axial direction. Formed,
A pipe joint mounted on either the first pipe member or the second pipe member.

The locking portion includes a linear engagement portion that engages with the first piping member or the second piping member, and a tapered surface portion that is disposed from the linear engagement portion toward an end surface. The pipe joint according to claim 1 or 2, wherein the pipe joint is provided.

4. The pipe joint according to claim 1, wherein the thin portion is formed of an elastic material having an elastic force in a radial direction or an axial direction.

The male joint of the first piping member is provided with a sealing member, and the outer diameter of the sealing member is smaller than the inner diameter of the engaging portion of the piping joint. A pipe joint according to 2, 3 or 4.

6. The inner diameter of the locking portion is formed to be smaller than the outer diameter of the general portion of the first piping member or the second piping member. Pipe fittings.

A pipe joint structure for connecting a first pipe member arranged with a male side joint and a second pipe member arranged with a female side joint with a pipe joint,
The pipe joint is formed with a plurality of first groove portions extending from the end face at positions equidistant from the axial center from one end of the cylindrically formed main body, and the plurality of first A plurality of second groove portions extending from an end surface opposite to the first groove portion are formed at an intermediate position between the groove portions, and between the first groove portions or the second groove at both end portions of the main body. At the end of the thin part formed between the groove parts, locking parts protruding toward the axial center are formed at a plurality of locations,
The locking portion at the end of the thin portion formed between the first groove portions and the locking portion at the end of the thin portion formed between the second groove portions are bilaterally symmetrical with respect to the central portion in the axial direction. Formed,
When the pipe joint, connects the first pipe member or the second mounted on one of the pipe members of the pipe member, the other one of the first piping member or the second pipe member The pipe joint structure is characterized in that the engaging part of the pipe joint is configured to be able to expand and contract.

The pipe joint structure according to claim 7, wherein the first pipe member and the second pipe member are in contact with each other with tapered surfaces.

In the female side joint of the second piping member, an extending tube portion is formed integrally with the female side joint toward the first piping member side, and the extending tube portion is formed along the circumferential direction. The pipe joint structure according to claim 7 or 8, wherein a window part engageable with the engaging part of the pipe joint is disposed.