JP4346325B2

JP4346325B2 - Pipe fitting

Info

Publication number: JP4346325B2
Application number: JP2003043826A
Authority: JP
Inventors: 博康山田; 昭水野
Original assignee: Yokohama Rubber Co Ltd
Current assignee: Yokohama Rubber Co Ltd
Priority date: 2003-02-21
Filing date: 2003-02-21
Publication date: 2009-10-21
Anticipated expiration: 2023-02-21
Also published as: JP2004251408A

Description

【０００１】
【発明の属する技術分野】
本発明は、高圧油圧配管などに使用される管継手に関し、更に詳しくは、残圧が残っていてもそれを外部に逃がすことなく減圧できるようにした管継手に関する。
【０００２】
【従来の技術】
一般に、高圧油圧配管などに使用される管継手は、筒状のアダプターの流路内に該流路を開閉する開閉弁を該流路に沿って移動自在に配設した雌継手と、筒状のニップルの流路内に該流路を開閉する開閉弁を該流路に沿って移動自在に配設した雄継手とからなり、雄継手を雌継手に挿入して連結することにより、両開閉弁を当接させて互いに反連結側に移動させることで開状態にしてアダプターとニップルの流路を連通するようになっている。
【０００３】
通常、雌継手が高圧側に、雄継手が低圧側に接続されるが、高圧側の雌継手内に高い残圧が残った状態で雄継手を連結しなければならない場合がしばしば生じる。雌継手内に高い残圧があると、作業員が手で雄継手を押し込んで連結することが困難になるため、雌継手の開閉弁は、アダプターの流路内に該流路に沿って移動自在に配設した筒状のポペットバルブと、そのポペットバルブの内側路に摺動自在に配設した円柱状の内蔵バルブとからなる２分割構造に構成され、連結時に雄継手の開閉弁で残圧の負荷が小さい小径の内蔵バルブを押し込んで開状態にし、内側路から高い残圧を逃がすことで、雌継手内に高い残圧が残っていても作業員が手で容易に雄継手を雌継手に連結できるようにしている（たとえば、特許文献１参照）。
【０００４】
【特許文献１】
特開昭５２−１２６５２６号公報
【０００５】
【発明が解決しようとする課題】
しかしながら、上述した内側路から逃がした残圧は、アダプターとニップルとの隙間から外部に流出するため、高圧油圧配管では油が外部に放出され、周囲環境を汚染するという問題があった。
【０００６】
本発明の目的は、残圧が残っていてもそれを外部に逃がすことなく減圧し、作業員が手で雄継手を雌継手に常に容易に連結することが可能な管継手を提供することにある。
【０００７】
【課題を解決するための手段】
上記目的を達成する本発明の管継手は、筒状のアダプターの流路内に該流路を開閉する第１開閉弁を該流路に沿って移動自在に配設した雌継手と、筒状のニップルの流路内に該流路を開閉する第２開閉弁を該流路に沿って移動自在に配設した雄継手とからなり、該雄継手を前記雌継手に挿入して連結することにより、前記第１開閉弁と前記第２開閉弁を当接させて互いに反連結側に移動させることで開状態にして前記アダプターの流路と前記ニップルの流路とを連通するようにした管継手において、前記第１開閉弁を、前記アダプターの流路内に該流路に沿って移動自在に配設され、前記アダプターの流路を開閉する筒状の第１ポペットバルブと、該第１ポペットバルブの内側路内に該内側路に沿って移動自在に配設され、該内側路を開閉する第１内蔵バルブとから構成し、
前記第２開閉弁を、前記ニップルの流路内に該流路に沿って移動自在に配設され、前記ニップルの流路を開閉する筒状の第２ポペットバルブと、該第２ポペットバルブの内側路内に該内側路に沿って移動自在に配設され、該内側路を開閉する第２内蔵バルブとから構成し、前記第１ポペットバルブの内側路と前記第２ポペットバルブの内側路を連通する筒状の連通体を、該内側路のいずれか一方の連結側に摺動自在に突設すると共に他方の内側路内に摺動自在に挿入可能に構成し、前記雄継手を前記雌継手に挿入した際に、前記第１ポペットバルブの内側路と前記第２ポペットバルブの内側路を連通した連通体が、更に前記第１内蔵バルブと前記第２内蔵バルブに当接して該第１内蔵バルブと第２内蔵バルブを反連結側に移動させて開状態にして、前記第１ポペットバルブの内側路と前記第２ポペットバルブの内側路が連通し、前記第１および第２内蔵バルブが反連結側に移動して開状態になった後、前記第１ポペットバルブと第２ポペットバルブが当接して互いに反連結側に移動することで開状態になる構成にしたことを特徴とする。
【０００８】
上述した本発明の管継手によれば、高い残圧が残っていても第１，第２開閉弁のメインバルブである第１，第２ポペットバルブを開状態にする前に、開状態になって連通した雄継手と雌継手の第１，第２ポペットバルブの内側路を介して残圧を圧力の低い側に逃がすことができるので、残圧が残っていてもそれを外部に放出することなく減圧することができ、高圧油圧配管の場合には油が外部に流出するのを防止して周囲環境を汚染するのを回避することができる。
【０００９】
残圧の負荷が小さい小径の内蔵バルブを移動させて開状態にし、内側路を介して高い残圧を逃がすので、高い残圧が残っていても作業員が手で雌継手と雄継手を容易に連結することが可能である。
【００１０】
本発明の他の管継手は、筒状のアダプターの流路内に該流路を開閉する第１開閉弁を該流路に沿って移動自在に配設した雌継手と、筒状のニップルの流路内に該流路を開閉する第２開閉弁を該流路に沿って移動自在に配設した雄継手とからなり、該雄継手を前記雌継手に連結することにより、前記第１開閉弁と前記第２開閉弁を当接させて互いに反連結側に移動させることで開状態にして前記アダプターの流路と前記ニップルの流路とを連通するようにした管継手において、前記アダプターと前記ニップルとの間に該アダプターの流路と前記ニップルの流路とを連通する連通手段を外設したことを特徴とする。
【００１１】
上述した本発明の他の管継手によれば、連通手段により圧力の低い側に残圧を逃がすことができるので、残圧が残っていてもそれを外部に放出することなく減圧することができる。また、連通手段より雌継手と雄継手の連結前に残圧を減圧することができるので、高い残圧が残っていても作業員が手で雌継手と雄継手を容易に連結することができる。
【００１２】
【発明の実施の形態】
以下、本発明の構成について添付の図面を参照しながら詳細に説明する。
【００１３】
図１，２は、本発明の管継手の一例を示し、この管継手は、雌継手Ａと雄継手Ｂとから構成されている。雌継手Ａは、円筒状のアダプター１を有し、このアダプター１の内周側空洞部が流路２になっている。流路２の中間部には、この流路２を開閉する第１開閉弁３が流路２に沿って移動自在に配設されている。
【００１４】
第１開閉弁３は、流路２に沿って移動自在に配設され、流路２を開閉する筒状の第１ポペットバルブ４と、この第１ポペットバルブ４の内側路５内に内側路５に沿って移動自在に配設され、内側路５を開閉する第１内蔵バルブ６とから構成されている。
【００１５】
第１ポペットバルブ４は、連結側に位置する径大の環状のバルブ本体４Ａと、このバルブ本体４Ａから反連結側に延在する径小の管状部４Ｂとからなり、バルブ本体４Ａの連結側が傾斜面４Ａ１に形成され、この傾斜面４Ａ１が流路２の傾斜壁面２ａに当接することで、第１ポペットバルブ４が流路２を閉止する。傾斜面４Ａ１に形成された環状溝にＯリング７が配置され、このＯリング７が傾斜壁面２ａと当接してシールするようになっている。
【００１６】
第１ポペットバルブ４の反連結側の流路２内には、第１ポペットバルブ４の移動をガイドするガイド体８が止め輪９でアダプター１に係止されている。ガイド体８は第１ポペットバルブ４の管状部４Ｂが摺動自在に挿入される円筒部８Ａと、この円筒部８Ａの外周側に周方向に沿って所定の間隔で突設した突起部８Ｂを有している。流路２の壁面に形成された環状溝に止め輪９が壁面から突出するように係止されており、図の例では第１ポペットバルブ４とガイド体８に介設されたコイル状のスプリング１０の付勢により、止め輪９に突起部８Ｂが当接することで、ガイド体８がアダプター１に係止されている。
【００１７】
また、第１ポペットバルブ４のバルブ本体４Ａとガイド体８の突起部８Ｂとの間に介設されたコイル状のスプリング１０により第１ポペットバルブ４のバルブ本体４Ａを流路２の傾斜壁面２ａに当接させた閉位置に常時付勢している。
【００１８】
第１内蔵バルブ６は球状に構成され、第１ポペットバルブ４の内側路５の壁面５ａに周方向に沿って環状に形成された凹部５ｂ内に移動自在に収容されている。第１内蔵バルブ６の連結側が凹部５ｂの開口壁面５ｃに当接することで内側路５を密閉的に閉止するようになっている。
【００１９】
第１内蔵バルブ６の反連結側の内側路５の凹部５ｂ内には、第１内蔵バルブ６の反連結側への移動を規制する円筒状の第１ストッパー１１が所定の距離だけ移動自在に配設されている。第１ストッパー１１の外周側にコイル状の第１スプリング１２が外装され、この第１スプリング１２により第１ストッパー１１を第１内蔵バルブ６に当接するように常時付勢し、それにより第１内蔵バルブ６を連結側に付勢して内側路５の凹部５ｂの開口壁面５ｃに当接させ、内側路５を閉止する閉位置に保持する。第１ストッパー１１の第１内蔵バルブ６に当接する連結側部には複数のスリット（不図示）が形成され、このスリットを介して流体が内側路５を流れるようになっている。
【００２０】
第１内蔵バルブ６より連結側の第１ポペットバルブ４の内側路５内には、第１ポペットバルブ４の内側路５と後述する第２ポペットバルブ３４の内側路３５とを連通する円筒状の連通体１３が摺動自在に取り付けられている。この連通体１３は第１ポペットバルブ４の内側路５から連結側に突出しており、その突出した部分が第２ポペットバルブ３４の内側路３５内に摺動自在に挿入できるようになっている。雌継手Ａに雄継手Ｂを挿入した際に、第１内蔵バルブ６及び後述する第２内蔵バルブ３６と当接することになる連通体１３の両端部には、それぞれ複数のスリット（不図示）が形成され、これらのスリットを介して流体を流れるようにしている。
【００２１】
第１開閉弁３より連結側の内周側空洞部が流路２より径を大きくした連結空間部１４に構成され、この連結空間部１４に雄継手Ｂが挿入される。連結空間部１４の壁面１４ａには周方向に沿って延在する環状溝１５が形成され、この環状溝１５にシール用のＯリング１６が装着されている。
【００２２】
環状溝１５より連結側の連結空洞部１４の壁面１４ａには、周方向に沿って所定の間隔で貫通孔１７が形成され、この貫通孔１７内に連結時に雌継手Ａと雄継手Ｂとをロックするためのロック用ボール１８が壁面１４ａから出没自在に収容されている。
【００２３】
連結空洞部１４の外周側に位置するアダプター１の連結側外周面には、周方向に沿って環状に延在する凹部２２がアダプター１の連結端まで達するようにして形成され、この凹部２２に連結操作用の円筒状のスリーブ１９が取り付けられている。スリーブ１９は、円筒状のスリーブ本体１９Ａと、このスリーブ本体１９Ａの内周側に突設した連結用ボール１８をロックするための環状の突起部１９Ｂを有し、スリーブ本体１９Ａの反連結側をアダプター１の外周面１ａに、突起部１９Ｂを貫通孔１７が開口する凹部２２の外周面２２ａに接触しながら、摺動自在に配設されている。
【００２４】
環状の凹部２２には、凹部２２の側面２２ｂと突起部１９Ｂの反連結側の側面１９Ｂ１との間に延設したコイルスプリング２０が外装され、このコイルスプリング２０によりスリーブ１９を常時連結側に付勢し、それにより突起部１９Ｂを凹部２２の外周面２２ａの連結側に設けたスリーブ抜け止めリング２１に当接させるようにしている。この位置で、突起部１９Ｂが貫通孔１７を塞ぎ、それにより連結用ボール１８を連結空間部１４の壁面１４ａから部分的に突出させたロック状態にする。スリーブ１９を反連結側に移動させて、突起部１９Ｂを貫通孔１７を塞がない位置に移動させることで、連結用ボール１８を凹部２２の外周面２２ａから出没可能にしてロックを解除できるようにしている。
【００２５】
雄継手Ｂは、筒状のニップル３１を有し、このニップル３１の内周空洞部が流路３２になっている。流路３２の連結側には、この流路３２を開閉する第２開閉弁３３が流路３２に沿って移動自在に配設されている。
【００２６】
第２開閉弁３３は、上記第１開閉弁３と同様に構成され、流路３２に沿って移動自在に配設され、流路３２を開閉する筒状の第２ポペットバルブ３４と、この第２ポペットバルブ３４の内側路３５内に内側路３５に沿って移動自在に配設され、内側路３５を開閉する第２内蔵バルブ３６とから構成されている。
【００２７】
第２ポペットバルブ３４は、連結側に位置して流路３２（ニップル３１）から外側に部分的に突出する径大の環状のバルブ本体３４Ａと、このバルブ本体３４Ａから反連結側に延在する径小の管状部３４Ｂとからなり、バルブ本体３４Ａの連結側が傾斜面３４Ａ１に形成され、この傾斜面３４Ａ１が流路３２の傾斜壁面３２ａに当接することで、第２ポペットバルブ３４が流路３２を閉止する。傾斜面３４Ａ１に形成された環状溝にＯリング３７が配置され、このＯリング３７が傾斜壁面３２ａと当接してシールするようになっている。
【００２８】
第２ポペットバルブ３４の反連結側の流路３２内には、第２ポペットバルブ３４の移動をガイドするガイド体３８が止め輪３９でニップル３１に係止されている。ガイド体３８は第２ポペットバルブ３４の管状部３４Ｂが摺動自在に挿入される円筒部３８Ａと、この円筒部３８Ａの外周側に周方向に沿って所定の間隔で突設した突起部３８Ｂを有している。流路３２の壁面に形成された環状溝に止め輪３９が壁面から突出するように係止されており、図の例では第２ポペットバルブ３４とガイド体３８に介設されたコイル状のスプリング４０の付勢により、止め輪３９に突起部３８Ｂが当接することで、ガイド体３８がニップル３１に係止されている。
【００２９】
また、第２ポペットバルブ３４のバルブ本体３４Ａとガイド体３８の突起部３８Ｂとの間に介設されたコイル状のスプリング４０により第２ポペットバルブ３４のバルブ本体３４Ａを流路３２の傾斜壁面３２ａに当接させた閉位置に常時付勢している。スプリング４０はスプリング１０と同等の付勢力を有している。
【００３０】
第２内蔵バルブ３６は球状に構成され、第２ポペットバルブ３４の内側路３５の壁面３５ａに周方向に沿って環状に形成された凹部３５ｂ内に移動自在に収容されている。第２内蔵バルブ３６の連結側が凹部３５ｂの開口壁面３５ｃに当接することで内側路３５を密閉的に閉止する。
【００３１】
第２内蔵バルブ３６の反連結側の内側路３５の凹部３５ｂ内には、第２内蔵バルブ３６の反連結側への移動を規制する円筒状の第２ストッパー４１が所定の距離だけ移動自在に配設されている。第２ストッパー４１の外周側にコイル状の第２スプリング４２が外装され、この第２スプリング４２により第２ストッパー４１を第２内蔵バルブ３６に当接するように常時付勢し、それにより第２内蔵バルブ３６を連結側に付勢して内側路３５の凹部３５ｂの開口壁面３５ｃに当接させ、内側路３５を閉止する閉位置に保持する。
【００３２】
第２スプリング４２は第１スプリング１２と同等の付勢力を有している。第２ストッパー４１の第２内蔵バルブ３６に当接する連結側部には複数のスリット（不図示）が形成され、このスリットを介して流体が内側路３５を流れるようにしている。
【００３３】
ニップル３１の連結側外周面３１ａには、周方向に沿って連結用ボール１８が係合可能な凹部４３が設けられている。
【００３４】
上述した管継手は、スリーブ１９を反連結側に移動させて突起部１９Ｂを貫通孔１７を塞がない位置に移動させ、連結用ボール１８を凹部２２の外周面２２ａから出没可能の状態で、雄継手Ｂを雌継手Ａの連結部１４に挿入して連結し、また分離するのは従来と同様であるが、挿入連結の際に本発明では以下のように作用する。なお、ここでは雌継手Ａが高圧側、雄継手Ｂが低圧側に接続され、雌継手Ａに高圧の残圧が残っている場合を例にとって説明する。
【００３５】
雄継手Ｂを雌継手Ａに挿入すると、図３（ａ）に示すように、第１ポペットバルブ４の内側路５の連結側部分５ｅから連結側に突出する連通体１３が第２ポペットバルブ３４の内側路３５の連結側部分３５ｅ内に挿入され、第１ポペットバルブ４の内側路５（連結側部分５ｅ）と第２ポペットバルブ３４の内側路３５（連結側部分３５ｅ）を連通する。連通体１３が第１内蔵バルブ６と第２内蔵バルブ３６に当接した状態で、更に雄継手Ｂが雌継手Ａの連結部１４内に挿入されると、図３（ｂ）に示すように、圧力差により低圧側の雄継手Ｂの第２内蔵バルブ３６が連通体１３により押し込まれて反連結側に移動し、第２内蔵バルブ３６を開口壁面３５ｃから離間させて開にする。
【００３６】
第２ストッパー４１が凹部３５ｂの反連結側の側面３５ｄに当接して第２内蔵バルブ３６の反連結側への移動が規制されると、図３（ｃ）に示すように、第１内蔵バルブ６が連通体１３により押されて反連結側に移動し、第１内蔵バルブ６を開口壁面５ｃから離間させて開にする。これにより連通している第１ポペットバルブ４の内側路５と第２ポペットバルブ３４の内側路３５を通って、雌継手Ａに残る高圧の残圧が雄継手Ｂ側に流れ、雌継手Ａ内の圧力と雄継手Ｂ内の圧力を均衡させる。従って、残圧が外部に放出されることなく減圧される。
【００３７】
第１ストッパー１１が凹部５ｂの反連結側の側面５ｄに当接して第１内蔵バルブ６の反連結側への移動が規制されると同時に、第１，第２ポペットバルブ４，３４が当接し（図３（ｃ）の状態）、更に雄継手Ｂが雌継手Ａの連結部１４内に挿入されると、第１，第２ポペットバルブ４，３４が互いに反連結側に移動し、図２に示すように、第１，第２ポペットバルブ４，３４を開、即ち、第１，第２開閉弁３，３３を開状態にしてアダプター１の流路２とニップル３１の流路３２とを連通させる。
【００３８】
なお、図３における５１，５２はシール用のＯリングであり、このＯリング５１，５２が連通体１３の外周面に当接してシールを確保する。
【００３９】
上述した本発明によれば、雌継手Ａの第１開閉弁３と雄継手Ｂの第２開閉弁３３を、それぞれポペットバルブ４，３４と内蔵バルブ６，３６を有する構成にし、雄継手Ｂを雌継手Ａに挿入した際に、第１，第２ポペットバルブ４，３４の内側路５，３５が連通し、第１，第２内蔵バルブ６，３６が反連結側に移動して開状態になった後、第１，第２ポペットバルブ４，３４が当接して互いに反連結側に移動することで第１，第２開閉弁３，３３を開状態にする構成にしたので、高圧側に接続された雌継手Ａ内に高い残圧が残っていてもそれを第１，第２ポペットバルブ４，３４の連通した内側路５，３５を介して雄継手Ｂ側に逃がすことができるので、残圧が残っていてもそれを外部に放出することなく減圧することができ、高圧油圧配管に使用した際には周囲環境を汚染するという問題を引き起こすのを防止することができる。
【００４０】
残圧の負荷が小さい小径の第１内蔵バルブ６を押し込んで開状態にし、内側路から高い残圧を逃がすので、雌継手Ａ内に高い残圧が残っていても作業員が手で雄継手Ｂを雌継手Ａに容易に連結することができる。
【００４１】
また、雌継手Ａの第１ストッパー１１と雄継手Ｂの第２ストッパー４１が第１，第２内蔵バルブ６，３６の移動を規制した際に、第１，第２ポペットバルブ４，３４が当接するので、雌継手Ａを高圧側に接続して雌継手Ａに高い残圧が残った上述の例の場合や、逆に雄継手Ｂを高圧側に接続して高い残圧が残った場合であっても、その残圧を逃がすことが可能になるので、従来のように雌継手Ａが高圧側、雄継手Ｂが低圧側という制限がなく、自由に取り付けることができるようになる。
【００４２】
上述した実施形態において、第１ポペットバルブ４の内側路５と第２ポペットバルブ３４の内側路３５とを連通する連通体１３は、上記のように雌継手Ａ側に設けるのが、その突出した部分をアダプター１の連結部１４内に位置させ、運搬時の衝突などによる破損を招き難くできるので好ましいが、第２内蔵バルブ３６より連結側の第２ポペットバルブ３４の内側路３５内に設けることも可能であり、上述した連通体１３は内側路５，３５のいずれか一方の連結側に取り付けるようにすればよい。
【００４３】
図４は、本発明の管継手の他の例を示し、この管継手は、上述した実施形態の第１，第２開閉弁３，３３を、第１，第２ポペットバルブ４，３４と第１，第２内蔵バルブ６，３６の２分割構造にすることに代えて、アダプター１とニップル３１との間にアダプター１の流路２とニップル３１の流路３２とを連通する連通手段６０を外設したものである。
【００４４】
第１，第２開閉弁３，３３は、連結側に位置する径大の環状のバルブ本体３Ａ，３３Ａと、このバルブ本体３Ａ，３３Ａから反連結側に延在する径小の柱状部３Ｂ，３３Ｂとからなり、バルブ本体３Ａ，３３Ａの連結側が傾斜面３Ａ１，３３Ａ１に形成され、この傾斜面３Ａ１，３３Ａ１が流路２，３２の傾斜壁面２ａ，３２ａに当接することで、第１，第２開閉弁３，３３が流路２，３２を閉止する。傾斜面３Ａ１，３３Ａ１に形成された環状溝にＯリング７，３７が配置され、このＯリング７，３７が傾斜壁面２ａ，３２ａと当接してシールする。ガイド体８，３８の円筒部８Ａ，３８Ａに柱状部３Ｂ，３３Ｂが摺動自在に挿入されている。
【００４５】
連通手段６０は、アダプター１の外周面１ａに設けた第１バルブ部６１と、ニップル３１の外周面３１ａに設けた第２バルブ部６２と、両バルブ部６１，６２間を着脱自在に接続する接続部６３とから構成されている。
【００４６】
第１バルブ部６１及び第２バルブ部６２は同じ構造で、図５（ａ）に示すように、筒状のハウジング６４と、このハウジング６４内の流路７３に移動自在に配設した弁体６５と、弁体６５を常時付勢して閉状態に保持するスプリング６６とを有している。
【００４７】
第１バルブ部６１は、ハウジング６４の一端部がアダプター１に螺設され、一端側がアダプター１の流路２に連通孔２５を介して連通している。第２バルブ部６２は、ハウジング６４の一端部がニップル３１に螺設され、一端側がニップル３１の流路３２に直接連通している。第１，第２バルブ部６１，６２の弁体６５は、ハウジング６４の他端側に向けてスプリング６６により常時付勢されている。
【００４８】
第１バルブ部６１及び第２バルブ部６２は、好ましくは、筒状のハウジング６４の他端を塞ぐキャップ部材６７を有するようにするのがよく、非使用時にキャップ部材６７をハウジング６４の他端部（ネジ部に形成）に螺合させてハウジング６４の他端を塞ぐことにより、ゴミなどがハウジング６４の流路７３内に進入するのを防止することができる。キャップ部材６７は、鎖６８でハウジング６４に接続しておくようにするのが紛失を回避する上で好ましい。
【００４９】
接続部６３は、図５（ｂ）に示すように、フレキシブルなホース６９とその両端に固設したキャップ体７０とを備えている。キャップ体７０は、第１，第２バルブ部６１，６２のハウジング６４の他端部に螺合可能に構成され、その螺合時に弁体６５をハウジング６４の一端側に向けて押圧可能な突起部７１がキャップ体７０の内側に設けられている。突起部７１には流路７４が形成され、この流路７４を介してホース６９とハウジング６４の流路７３を連通するようになっている。
【００５０】
上述した図４の管継手を上記と同様に、雌継手Ａが高圧側に、雄継手Ｂが低圧側に接続され、雌継手Ａに高圧の残圧が残っている場合を例にとって説明すると、先ず、第１バルブ部６１及び第２バルブ部６２のハウジング６４の他端部に接続部６３のキャップ体７０を弁体６５が開く手前の位置まで螺合させて取り付ける。取り付け後、低圧側の第２バルブ部６２に取り付けたキャップ体７０を更にネジ込んで、突起部７１により弁体６５をハウジング６４の一端側に押し込んで開とする。
【００５１】
次いで、高圧側の第１バルブ部６１に取り付けたキャップ体７０を更にネジ込んで、突起部７１により弁体６５をハウジング６４の一端側に押し込んで開とする。これにより、雌継手Ａに残る高圧の残圧がホース６９を通って雄継手Ｂ側に流れ、雌継手Ａ内の圧力と雄継手Ｂ内の圧力を均衡させる。従って、残圧が外部に放出されることなく減圧される。
【００５２】
圧力が均衡した後、スリーブ１９を反連結側に移動させて突起部１９Ｂを貫通孔１７を塞がない位置に移動させ、連結用ボール１８を凹部２２の外周面２２ａから出没可能の状態で、雄継手Ｂを雌継手Ａの連結部１４に挿入する。第１開閉弁３と第２開閉弁３３が当接して互いに反連結側に移動し、第１開閉弁３と第２開閉弁３３が開状態になり、アダプター１の流路２とニップル３１の流路３２とが連通する。高い残圧を低圧側に逃がして雄継手Ｂと雌継手Ａの内部圧力が均衡しているので、作業員が手で雄継手Ｂを雌継手Ａ内に挿入して容易に連結することができる。
【００５３】
このようにアダプター１とニップル３１との間にアダプター１の流路２とニップル３１の流路３２とを連通する連通手段６０を設けることによっても、上記と同様の効果を奏することができる。
【００５４】
【発明の効果】
上述したように本発明の管継手は、雌継手の第１開閉弁と雄継手の第２開閉弁をそれぞれポペットバルブと内蔵バルブとを有する構成にし、雄継手を雌継手に挿入した際に、雌継手の第１ポペットバルブの内側路と雄継手の第２ポペットバルブの内側路が連通し、雌継手の第１内蔵バルブと雄継手の第２内蔵バルブが反連結側に移動して開状態になった後、第１，第２ポペットバルブが当接して互いに反連結側に移動することで開状態にするように構成する、あるいは雌継手のアダプターと雄継手のニップルとの間にアダプターの流路とニップルの流路とを連通する連通手段を外設したので、残圧が残っていてもそれを外部に逃がすことなく減圧し、作業員が手で常に容易に雌継手と雄継手とを連結することができる。
【図面の簡単な説明】
【図１】本発明の管継手の一例を連結前の状態で示す半断面正面図である。
【図２】図１の管継手を連結した状態で示す半断面正面図である。
【図３】（ａ）〜（ｃ）は、それぞれ図１の管継手を連結する際の作用を示す要部拡大断面図である。
【図４】本発明の管継手の他の例を連結した状態で示す半断面正面図である。
【図５】（ａ）が連通手段のバルブ部を拡大して示す半断面正面図、（ｂ）が接続部の要部を拡大して示す一部断面正面図である。
【符号の説明】
１アダプター２流路
３第１開閉弁４第１ポペットバルブ
５内側路６第１内蔵バルブ
１０スプリング１１第１ストッパー
１２第１スプリング１３連通体
３１ニップル３２流路
３３第２開閉弁３４第２ポペットバルブ
３５内側路３６第２内蔵バルブ
４０スプリング４１第２ストッパー
４２第２スプリング６０連通手段
６１第１バルブ部６２第２バルブ部
６３接続部６４ハウジング
６５弁体６６スプリング
６９ホース７０キャップ体
７１突起部Ａ雌継手
Ｂ雄継手[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe joint used for high-pressure hydraulic piping and the like, and more particularly to a pipe joint that can reduce pressure without escaping it even if residual pressure remains.
[0002]
[Prior art]
In general, pipe joints used for high-pressure hydraulic pipes, etc. are a female joint in which an on-off valve for opening and closing the flow path is movably disposed in the flow path of a cylindrical adapter, and a tubular shape. The open / close valve that opens and closes the flow path in the flow path of the nipple is composed of a male joint that is movably disposed along the flow path. The valves are brought into contact with each other and moved to the opposite connection side so that the valve is opened and the flow path between the adapter and the nipple is communicated.
[0003]
Usually, the female joint is connected to the high-pressure side and the male joint is connected to the low-pressure side. However, it often happens that the male joint must be connected with a high residual pressure remaining in the high-pressure side female joint. If there is a high residual pressure in the female joint, it will be difficult for the operator to push the male joint by hand and connect it, so the open / close valve of the female joint will move along the flow path into the flow path of the adapter. It has a two-part structure consisting of a cylindrical poppet valve that is freely arranged and a cylindrical built-in valve that is slidably disposed in the inner passage of the poppet valve. By pushing a small-diameter built-in valve with a small pressure load into the open state and releasing the high residual pressure from the inner passage, even if high residual pressure remains in the female joint, an operator can easily connect the male joint to the female It can be connected to a joint (for example, see Patent Document 1).
[0004]
[Patent Document 1]
JP 52-126526 A
[0005]
[Problems to be solved by the invention]
However, since the residual pressure released from the above-described inner passage flows out through the gap between the adapter and the nipple, oil is discharged to the outside in the high-pressure hydraulic piping, which contaminates the surrounding environment.
[0006]
An object of the present invention is to provide a pipe joint in which even if residual pressure remains, the pressure is reduced without letting it escape to the outside, and an operator can always easily connect the male joint to the female joint by hand. is there.
[0007]
[Means for Solving the Problems]
The pipe joint of the present invention that achieves the above object includes a female joint in which a first on-off valve for opening and closing the flow path is movably disposed in the flow path of a cylindrical adapter, and a tubular shape. A male joint in which a second on-off valve for opening and closing the flow path is movably disposed along the flow path, and the male joint is inserted into and connected to the female joint. Accordingly, the tube that is in an open state by bringing the first on-off valve and the second on-off valve into contact with each other and moving them to the opposite connection side to communicate the flow path of the adapter and the flow path of the nipple. In the joint, the first open / close valve is disposed in the flow path of the adapter so as to be movable along the flow path, and a cylindrical first poppet valve that opens and closes the flow path of the adapter; The poppet valve is movably disposed along the inner path in the inner path of the poppet valve, and opens and closes the inner path. Consist of a first internal valve,
The second open / close valve is disposed in the flow path of the nipple so as to be movable along the flow path, and has a cylindrical second poppet valve that opens and closes the flow path of the nipple, and the second poppet valve A second built-in valve that is movably disposed along the inner path and opens and closes the inner path; A cylindrical communication body that communicates the inner path of the first poppet valve and the inner path of the second poppet valve is slidably provided on either one of the inner paths, and the other inner path. It can be slidably inserted into When the male joint is inserted into the female joint, A communicating body that communicates the inner path of the first poppet valve and the inner path of the second poppet valve further contacts the first built-in valve and the second built-in valve to contact the first built-in valve and the second built-in valve. To the anti-connection side to open it, An inner path of the first poppet valve communicates with an inner path of the second poppet valve, and the first poppet valve and After the second built-in valve is moved to the anti-connection side and opened, the first With poppet valve The second poppet valve is brought into contact with each other and moved to the opposite connection side to be in an open state.
[0008]
According to the above-described pipe joint of the present invention, even if a high residual pressure remains, the pipe joint is opened before the first and second poppet valves, which are the main valves of the first and second on-off valves, are opened. The residual pressure can be released to the low pressure side via the inner passages of the first and second poppet valves of the male and female joints communicating with each other, so that even if residual pressure remains, it should be released to the outside. In the case of a high pressure hydraulic pipe, it is possible to prevent the oil from flowing out to prevent the surrounding environment from being contaminated.
[0009]
A small internal valve with a small residual pressure load is moved to the open state to release the high residual pressure through the inner passage, so that even if high residual pressure remains, workers can easily connect the female and male joints by hand. Can be connected.
[0010]
Another pipe joint of the present invention includes a female joint in which a first on-off valve for opening and closing the flow path is movably disposed along the flow path in the flow path of the cylindrical adapter, and a tubular nipple. The first opening / closing valve comprises a male joint in which a second on-off valve that opens and closes the flow path is movably disposed along the flow path, and the male joint is connected to the female joint. In the pipe joint in which the valve and the second on-off valve are brought into contact with each other and moved to the opposite connection side so as to be in an open state so that the flow path of the adapter and the flow path of the nipple communicate with each other. A communicating means for communicating the flow path of the adapter and the flow path of the nipple is provided between the nipple and the nipple.
[0011]
According to the other pipe joint of the present invention described above, the residual pressure can be released to the low pressure side by the communication means, so that even if the residual pressure remains, it can be reduced without releasing it to the outside. . Moreover, since the residual pressure can be reduced before the connection between the female joint and the male joint by the communication means, the worker can easily connect the female joint and the male joint by hand even if a high residual pressure remains. .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
[0013]
1 and 2 show an example of the pipe joint of the present invention, and this pipe joint is composed of a female joint A and a male joint B. The female joint A has a cylindrical adapter 1, and the inner peripheral side cavity of the adapter 1 is a flow path 2. A first opening / closing valve 3 that opens and closes the flow path 2 is movably disposed along the flow path 2 at an intermediate portion of the flow path 2.
[0014]
The first on-off valve 3 is movably disposed along the flow path 2, and has a cylindrical first poppet valve 4 that opens and closes the flow path 2, and an inner path in the inner path 5 of the first poppet valve 4. The first built-in valve 6 that is movably disposed along the inner path 5 and opens and closes the inner passage 5 is configured.
[0015]
The first poppet valve 4 includes a large-diameter annular valve body 4A located on the connection side, and a small-diameter tubular portion 4B extending from the valve body 4A to the anti-connection side. The first poppet valve 4 closes the flow path 2 by being formed on the inclined surface 4A1 and contacting the inclined wall surface 2a of the flow path 2 with the inclined surface 4A1. An O-ring 7 is disposed in an annular groove formed in the inclined surface 4A1, and this O-ring 7 comes into contact with the inclined wall surface 2a for sealing.
[0016]
A guide body 8 that guides the movement of the first poppet valve 4 is locked to the adapter 1 by a retaining ring 9 in the flow path 2 on the opposite side of the first poppet valve 4. The guide body 8 includes a cylindrical portion 8A into which the tubular portion 4B of the first poppet valve 4 is slidably inserted, and a protruding portion 8B projecting at a predetermined interval along the circumferential direction on the outer peripheral side of the cylindrical portion 8A. Have. A retaining ring 9 is locked to an annular groove formed on the wall surface of the flow path 2 so as to protrude from the wall surface. In the example shown in the figure, a coil-shaped spring interposed between the first poppet valve 4 and the guide body 8. The guide body 8 is locked to the adapter 1 by the protrusion 8 </ b> B coming into contact with the retaining ring 9 by the urging force 10.
[0017]
The valve body 4A of the first poppet valve 4 is connected to the inclined wall surface 2a of the flow path 2 by a coiled spring 10 interposed between the valve body 4A of the first poppet valve 4 and the protrusion 8B of the guide body 8. Is always urged to the closed position in contact with.
[0018]
The first built-in valve 6 is formed in a spherical shape, and is movably accommodated in a recess 5 b formed in an annular shape along the circumferential direction on the wall surface 5 a of the inner passage 5 of the first poppet valve 4. The connecting side of the first built-in valve 6 comes into contact with the opening wall surface 5c of the recess 5b so that the inner passage 5 is hermetically closed.
[0019]
A cylindrical first stopper 11 for restricting the movement of the first built-in valve 6 to the anti-connection side is movable within a predetermined distance in the recess 5b of the inner passage 5 on the anti-connection side of the first built-in valve 6. It is arranged. A coil-shaped first spring 12 is externally provided on the outer periphery of the first stopper 11, and the first spring 12 is always urged to contact the first built-in valve 6 by the first spring 12, thereby the first built-in valve. The valve 6 is urged toward the connecting side to abut against the opening wall surface 5c of the recess 5b of the inner path 5 and is held at the closed position where the inner path 5 is closed. A plurality of slits (not shown) are formed in the connecting side portion of the first stopper 11 that contacts the first built-in valve 6, and fluid flows through the inner passage 5 through the slits.
[0020]
In the inner passage 5 of the first poppet valve 4 on the connection side from the first built-in valve 6, a cylindrical shape that communicates the inner passage 5 of the first poppet valve 4 and the inner passage 35 of the second poppet valve 34 described later. The communicating body 13 is slidably attached. The communication body 13 protrudes from the inner passage 5 of the first poppet valve 4 to the connection side, and the protruding portion can be slidably inserted into the inner passage 35 of the second poppet valve 34. When the male joint B is inserted into the female joint A, a plurality of slits (not shown) are respectively provided at both ends of the communicating body 13 that comes into contact with the first built-in valve 6 and a second built-in valve 36 described later. The fluid is formed and flows through these slits.
[0021]
An inner peripheral cavity portion on the connection side with respect to the first on-off valve 3 is configured in a connection space portion 14 having a diameter larger than that of the flow path 2, and the male joint B is inserted into the connection space portion 14. An annular groove 15 extending in the circumferential direction is formed in the wall surface 14 a of the connection space portion 14, and an O-ring 16 for sealing is attached to the annular groove 15.
[0022]
Through holes 17 are formed at predetermined intervals along the circumferential direction in the wall surface 14a of the connection cavity 14 on the connection side from the annular groove 15, and the female joint A and the male joint B are connected to each other in the through hole 17 when connected. A locking ball 18 for locking is accommodated so as to be able to appear and retract from the wall surface 14a.
[0023]
A concave portion 22 extending annularly along the circumferential direction is formed on the outer peripheral surface of the adapter 1 located on the outer peripheral side of the connecting cavity portion 14 so as to reach the connecting end of the adapter 1. A cylindrical sleeve 19 for connection operation is attached. The sleeve 19 has a cylindrical sleeve main body 19A and an annular protrusion 19B for locking the connecting ball 18 projecting on the inner peripheral side of the sleeve main body 19A. On the outer peripheral surface 1 a of the adapter 1, the protrusion 19 </ b> B is slidably disposed while contacting the outer peripheral surface 22 a of the recess 22 in which the through hole 17 opens.
[0024]
The annular recess 22 is externally provided with a coil spring 20 extending between the side surface 22b of the recess 22 and the side surface 19B1 on the opposite side of the protrusion 19B. The coil spring 20 always attaches the sleeve 19 to the connection side. Thus, the protrusion 19B is brought into contact with the sleeve retaining ring 21 provided on the connection side of the outer peripheral surface 22a of the recess 22. At this position, the projecting portion 19B closes the through hole 17, thereby bringing the connecting ball 18 into a locked state in which it partially protrudes from the wall surface 14a of the connecting space portion 14. By moving the sleeve 19 to the anti-connection side and moving the projection 19B to a position where the through hole 17 is not blocked, the connection ball 18 can be projected and retracted from the outer peripheral surface 22a of the recess 22 so that the lock can be released. I have to.
[0025]
The male joint B has a cylindrical nipple 31, and an inner peripheral cavity portion of the nipple 31 serves as a flow path 32. A second on-off valve 33 that opens and closes the flow path 32 is movably disposed along the flow path 32 on the connection side of the flow path 32.
[0026]
The second on-off valve 33 is configured in the same manner as the first on-off valve 3, and is disposed movably along the flow path 32, and a cylindrical second poppet valve 34 that opens and closes the flow path 32, The second poppet valve 34 includes a second built-in valve 36 that is movably disposed along the inner path 35 and opens and closes the inner path 35.
[0027]
The second poppet valve 34 is positioned on the connection side and has a large-diameter annular valve body 34A partially protruding outward from the flow path 32 (nipple 31), and extends from the valve body 34A to the anti-connection side. The connecting portion of the valve body 34A is formed on the inclined surface 34A1, and the inclined surface 34A1 abuts on the inclined wall surface 32a of the flow path 32, so that the second poppet valve 34 is connected to the flow path 32. Close. An O-ring 37 is disposed in an annular groove formed in the inclined surface 34A1, and the O-ring 37 is in contact with the inclined wall surface 32a for sealing.
[0028]
A guide body 38 that guides the movement of the second poppet valve 34 is locked to the nipple 31 by a retaining ring 39 in the flow path 32 on the opposite side of the second poppet valve 34. The guide body 38 includes a cylindrical portion 38A into which the tubular portion 34B of the second poppet valve 34 is slidably inserted, and a protruding portion 38B projecting at a predetermined interval along the circumferential direction on the outer peripheral side of the cylindrical portion 38A. Have. A retaining ring 39 is engaged with an annular groove formed on the wall surface of the flow path 32 so as to protrude from the wall surface. In the example shown in the figure, a coil-shaped spring interposed between the second poppet valve 34 and the guide body 38 is used. The guide body 38 is locked to the nipple 31 by the protrusion 38 </ b> B coming into contact with the retaining ring 39 by the urging force 40.
[0029]
Further, the coil body spring A interposed between the valve body 34A of the second poppet valve 34 and the protrusion 38B of the guide body 38 causes the valve body 34A of the second poppet valve 34 to be inclined to the inclined wall surface 32a of the flow path 32. Is always urged to the closed position in contact with. The spring 40 has an urging force equivalent to that of the spring 10.
[0030]
The second built-in valve 36 is formed in a spherical shape, and is movably accommodated in a concave portion 35 b formed in an annular shape along the circumferential direction on the wall surface 35 a of the inner passage 35 of the second poppet valve 34. The connection side of the second built-in valve 36 comes into contact with the opening wall surface 35c of the recess 35b, so that the inner path 35 is hermetically closed.
[0031]
A cylindrical second stopper 41 for restricting the movement of the second built-in valve 36 to the anti-connection side is movable within a predetermined distance in the recess 35b of the inner passage 35 on the anti-connection side of the second built-in valve 36. It is arranged. A coil-shaped second spring 42 is externally provided on the outer peripheral side of the second stopper 41, and the second spring 41 is always urged to abut against the second built-in valve 36 by the second spring 42. The valve 36 is urged toward the connection side to contact the opening wall surface 35c of the recess 35b of the inner path 35, and is held at the closed position where the inner path 35 is closed.
[0032]
The second spring 42 has an urging force equivalent to that of the first spring 12. A plurality of slits (not shown) are formed in the connecting side portion of the second stopper 41 that contacts the second built-in valve 36, and fluid flows through the inner passage 35 through the slits.
[0033]
The connection side outer peripheral surface 31a of the nipple 31 is provided with a recess 43 that can engage the connection ball 18 along the circumferential direction.
[0034]
In the pipe joint described above, the sleeve 19 is moved to the anti-connection side, the protrusion 19B is moved to a position where the through hole 17 is not blocked, and the connection ball 18 can be projected and retracted from the outer peripheral surface 22a of the recess 22, The male joint B is inserted into the connecting portion 14 of the female joint A to be connected and separated, as in the prior art. However, the present invention acts as follows in the insertion and connection. Here, the case where the female joint A is connected to the high-pressure side and the male joint B is connected to the low-pressure side, and the high-pressure residual pressure remains in the female joint A will be described as an example.
[0035]
When the male joint B is inserted into the female joint A, as shown in FIG. 3A, the communicating body 13 that protrudes from the connection side portion 5 e of the inner passage 5 of the first poppet valve 4 to the connection side becomes the second poppet valve 34. The inner passage 5 of the first poppet valve 4 (connection side portion 5e) and the inner passage 35 (connection side portion 35e) of the second poppet valve 34 are communicated with each other. When the male joint B is further inserted into the connecting portion 14 of the female joint A in a state where the communicating body 13 is in contact with the first built-in valve 6 and the second built-in valve 36, as shown in FIG. Due to the pressure difference, the second built-in valve 36 of the male joint B on the low pressure side is pushed in by the communicating body 13 and moves to the non-connecting side, and the second built-in valve 36 is separated from the opening wall surface 35c and opened.
[0036]
When the second stopper 41 comes into contact with the side surface 35d on the anti-connection side of the recess 35b and the movement of the second internal valve 36 to the anti-connection side is restricted, as shown in FIG. 3 (c), the first internal valve 6 is pushed by the communicating body 13 and moves to the opposite connection side, and the first built-in valve 6 is separated from the opening wall surface 5c and opened. As a result, the high-pressure residual pressure remaining in the female joint A flows to the male joint B side through the inner path 5 of the first poppet valve 4 and the inner path 35 of the second poppet valve 34 that are in communication with each other. And the pressure in the male joint B are balanced. Therefore, the residual pressure is reduced without being released to the outside.
[0037]
The first stopper 11 abuts against the side surface 5d on the anti-connection side of the recess 5b to restrict the movement of the first built-in valve 6 to the anti-connection side, and at the same time, the first and second poppet valves 4 and 34 abut. When the male joint B is further inserted into the connecting portion 14 of the female joint A (the state of FIG. 3C), the first and second poppet valves 4 and 34 move to the opposite connection side, and FIG. As shown, the first and second poppet valves 4 and 34 are opened, that is, the first and second on-off valves 3 and 33 are opened, and the flow path 2 of the adapter 1 and the flow path 32 of the nipple 31 are connected. Communicate.
[0038]
Note that reference numerals 51 and 52 in FIG. 3 denote O-rings for sealing, and the O-rings 51 and 52 abut against the outer peripheral surface of the communicating body 13 to ensure a seal.
[0039]
According to the present invention described above, the first on-off valve 3 of the female joint A and the second on-off valve 33 of the male joint B are configured to have the poppet valves 4 and 34 and the built-in valves 6 and 36, respectively. When inserted into the female joint A, the inner passages 5 and 35 of the first and second poppet valves 4 and 34 communicate with each other, and the first and second built-in valves 6 and 36 move to the anti-connection side to be opened. After the first and second poppet valves 4 and 34 are brought into contact with each other and moved to the opposite connection side, the first and second on-off valves 3 and 33 are opened. Even if a high residual pressure remains in the connected female joint A, it can be released to the male joint B side through the inner passages 5, 35 communicating with the first and second poppet valves 4, 34. Even if residual pressure remains, it can be reduced without releasing it to the outside, and it can be connected to high-pressure hydraulic piping. Upon use it can be prevented from causing the problem of contaminating the surrounding environment.
[0040]
The small built-in first built-in valve 6 with a small residual pressure load is pushed in and opened to release the high residual pressure from the inner passage, so that even if high residual pressure remains in the female joint A, the worker must manually B can be easily connected to the female joint A.
[0041]
When the first stopper 11 of the female joint A and the second stopper 41 of the male joint B restrict the movement of the first and second built-in valves 6 and 36, the first and second poppet valves 4 and 34 In the case of the above-mentioned example in which the female joint A is connected to the high pressure side and a high residual pressure remains in the female joint A, or conversely, the male joint B is connected to the high pressure side and the high residual pressure remains. Even if it exists, since it becomes possible to release the residual pressure, there is no restriction that the female joint A is on the high-pressure side and the male joint B is on the low-pressure side as in the prior art, so that it can be attached freely.
[0042]
In the above-described embodiment, the communicating body 13 that communicates the inner path 5 of the first poppet valve 4 and the inner path 35 of the second poppet valve 34 is provided on the female joint A side as described above, and protrudes from it. It is preferable that the portion is located in the connecting portion 14 of the adapter 1 and is less likely to be damaged due to a collision during transportation. However, it is preferably provided in the inner passage 35 of the second poppet valve 34 on the connecting side from the second built-in valve 36. The above-described communicating body 13 may be attached to any one of the inner paths 5 and 35.
[0043]
FIG. 4 shows another example of the pipe joint of the present invention. This pipe joint includes the first and second on-off valves 3 and 33 of the above-described embodiment, the first and second poppet valves 4 and 34, and the first. In place of the two-divided structure of the first and second built-in valves 6 and 36, a communication means 60 for communicating the flow path 2 of the adapter 1 and the flow path 32 of the nipple 31 between the adapter 1 and the nipple 31 is provided. It is an external installation.
[0044]
The first and second on-off valves 3 and 33 include large-diameter annular valve bodies 3A and 33A located on the connection side, and small-diameter columnar portions 3B extending from the valve bodies 3A and 33A to the anti-connection side. 33B, the connecting sides of the valve bodies 3A and 33A are formed on the inclined surfaces 3A1 and 33A1, and the inclined surfaces 3A1 and 33A1 come into contact with the inclined wall surfaces 2a and 32a of the flow passages 2 and 32, so that the first and first 2 On-off valves 3 and 33 close the flow paths 2 and 32. O-rings 7 and 37 are disposed in annular grooves formed in the inclined surfaces 3A1 and 33A1, and the O-rings 7 and 37 come into contact with the inclined wall surfaces 2a and 32a for sealing. Columnar portions 3B and 33B are slidably inserted into the cylindrical portions 8A and 38A of the guide bodies 8 and 38, respectively.
[0045]
The communication means 60 detachably connects the first valve portion 61 provided on the outer peripheral surface 1 a of the adapter 1, the second valve portion 62 provided on the outer peripheral surface 31 a of the nipple 31, and the both valve portions 61, 62. The connection part 63 is comprised.
[0046]
The first valve portion 61 and the second valve portion 62 have the same structure, and as shown in FIG. 5A, a valve body movably disposed in a cylindrical housing 64 and a flow path 73 in the housing 64. 65 and a spring 66 that constantly biases the valve body 65 and holds it in a closed state.
[0047]
The first valve portion 61 has one end portion of the housing 64 screwed to the adapter 1 and one end side communicating with the flow path 2 of the adapter 1 through the communication hole 25. In the second valve portion 62, one end portion of the housing 64 is screwed to the nipple 31, and one end side communicates directly with the flow path 32 of the nipple 31. The valve bodies 65 of the first and second valve portions 61 and 62 are always urged by a spring 66 toward the other end side of the housing 64.
[0048]
The first valve portion 61 and the second valve portion 62 preferably have a cap member 67 that closes the other end of the cylindrical housing 64, and the cap member 67 is connected to the other end of the housing 64 when not in use. It is possible to prevent dust and the like from entering the flow path 73 of the housing 64 by screwing into the portion (formed on the screw portion) and closing the other end of the housing 64. The cap member 67 is preferably connected to the housing 64 with a chain 68 in order to avoid loss.
[0049]
As shown in FIG. 5B, the connecting portion 63 includes a flexible hose 69 and cap bodies 70 fixed to both ends thereof. The cap body 70 is configured to be able to be screwed to the other end portion of the housing 64 of the first and second valve portions 61 and 62, and the protrusion capable of pressing the valve body 65 toward one end side of the housing 64 at the time of the screwing. The part 71 is provided inside the cap body 70. A channel 74 is formed in the protruding portion 71, and the hose 69 and the channel 73 of the housing 64 are communicated with each other through the channel 74.
[0050]
The above-described pipe joint of FIG. 4 will be described by taking as an example the case where the female joint A is connected to the high pressure side, the male joint B is connected to the low pressure side, and the high pressure residual pressure remains in the female joint A. First, the cap body 70 of the connection portion 63 is screwed to the other end portion of the housing 64 of the first valve portion 61 and the second valve portion 62 until the valve body 65 is opened. After the attachment, the cap body 70 attached to the second valve portion 62 on the low-pressure side is further screwed, and the valve body 65 is pushed into one end side of the housing 64 by the protrusion 71 to be opened.
[0051]
Next, the cap body 70 attached to the first valve portion 61 on the high-pressure side is further screwed, and the valve body 65 is pushed into one end side of the housing 64 by the protrusion 71 to be opened. Thereby, a high residual pressure remaining in the female joint A flows through the hose 69 to the male joint B side, and the pressure in the female joint A and the pressure in the male joint B are balanced. Therefore, the residual pressure is reduced without being released to the outside.
[0052]
After the pressure is balanced, the sleeve 19 is moved to the anti-connection side to move the projection 19B to a position where the through-hole 17 is not blocked, and the connection ball 18 can be projected and retracted from the outer peripheral surface 22a of the recess 22. The male joint B is inserted into the connecting portion 14 of the female joint A. The first on-off valve 3 and the second on-off valve 33 come into contact with each other and move to the opposite connection side, the first on-off valve 3 and the second on-off valve 33 are opened, and the flow path 2 of the adapter 1 and the nipple 31 The flow path 32 communicates. Since the high residual pressure is released to the low pressure side and the internal pressures of the male joint B and the female joint A are balanced, the operator can easily connect the male joint B by inserting it into the female joint A by hand. .
[0053]
Thus, the same effect as described above can also be achieved by providing the communication means 60 that communicates the flow path 2 of the adapter 1 and the flow path 32 of the nipple 31 between the adapter 1 and the nipple 31.
[0054]
【The invention's effect】
As described above, the pipe joint of the present invention has a configuration in which the first on-off valve of the female joint and the second on-off valve of the male joint each have a poppet valve and a built-in valve, and when the male joint is inserted into the female joint, The inner passage of the first poppet valve of the female joint communicates with the inner passage of the second poppet valve of the male joint, and the first built-in valve of the female joint and the second built-in valve of the male joint move to the opposite connection side and are open. After that, the first and second poppet valves are brought into contact with each other and moved to the opposite connection side so as to be in an open state, or between the adapter of the female joint and the nipple of the male joint. Since the communication means for connecting the flow path and the flow path of the nipple is provided outside, even if residual pressure remains, the pressure is reduced without letting it escape to the outside. Can be connected.
[Brief description of the drawings]
FIG. 1 is a half sectional front view showing an example of a pipe joint of the present invention in a state before connection.
FIG. 2 is a half cross-sectional front view showing a state in which the pipe joint of FIG. 1 is connected.
FIGS. 3A to 3C are enlarged cross-sectional views of main parts illustrating the operation when connecting the pipe joints of FIG. 1 respectively.
FIG. 4 is a half sectional front view showing another example of the pipe joint of the present invention in a connected state.
5A is a half cross-sectional front view showing an enlarged valve portion of the communication means, and FIG. 5B is a partial cross-sectional front view showing an enlarged main portion of the connection portion.
[Explanation of symbols]
1 Adapter 2 Flow path
3 First on-off valve 4 First poppet valve
5 Inner path 6 First built-in valve
10 Spring 11 First stopper
12 First spring 13 Communicator
31 Nipple 32 Flow path
33 Second open / close valve 34 Second poppet valve
35 Inner path 36 Second built-in valve
40 Spring 41 Second stopper
42 Second spring 60 Communication means
61 1st valve part 62 2nd valve part
63 Connection 64 Housing
65 Valve body 66 Spring
69 Hose 70 Cap body
71 Protrusion A Female fitting
B Male fitting

Claims

A female joint in which a first on-off valve that opens and closes the flow path in the flow path of the cylindrical adapter is movably disposed along the flow path, and the flow path is opened and closed in the flow path of the cylindrical nipple. A second on-off valve that is movably disposed along the flow path, and the first on-off valve and the second on-off valve are connected by inserting and connecting the male joint to the female joint. In the pipe joint in which the valve is brought into contact with each other and moved to the opposite connection side so as to be in an open state so as to communicate the flow path of the adapter and the flow path of the nipple.
The first open / close valve is movably disposed in the flow path of the adapter along the flow path, and a cylindrical first poppet valve that opens and closes the flow path of the adapter; and A first built-in valve that is movably disposed along the inner path and opens and closes the inner path;
The second open / close valve is disposed in the flow path of the nipple so as to be movable along the flow path, and has a cylindrical second poppet valve that opens and closes the flow path of the nipple, and the second poppet valve A second built-in valve that is movably disposed along the inner path and opens and closes the inner path;
A cylindrical communication body that communicates the inner path of the first poppet valve and the inner path of the second poppet valve is slidably provided on either one of the inner paths, and the other inner path. It can be slidably inserted into
When the male joint is inserted into the female joint, a communication body that connects the inner passage of the first poppet valve and the inner passage of the second poppet valve is further connected to the first built-in valve and the second built-in valve. The first built-in valve and the second built-in valve are brought into contact with each other and moved to the opposite connection side to open the first poppet valve, and the inner passage of the first poppet valve and the inner passage of the second poppet valve communicate with each other. After the second built-in valve moves to the anti-connection side and enters the open state, the first poppet valve and the second poppet valve come into contact with each other and move to the anti-connection side so that the open state is established. Pipe fittings.

The pipe joint according to claim 1 , wherein the communication body is slidably attached to an inner path of the first poppet valve.

The female joint has a first stopper that restricts movement of the first built-in valve to the anti-connection side in the inner path of the first poppet valve, and the male joint is in the inner path of the second poppet valve. 2 having a second stopper that restricts the movement of the built-in valve to the anti-connection side;
When the first poppet valve and the second poppet valve come into contact with each other, the first built-in valve that is pushed by the communicating body and moves to the anti-connection side is restricted from moving to the anti-connection side by the first stopper. The pipe joint according to claim 1 or 2 , wherein the second built-in valve is restricted from moving to the anti-connection side by the second stopper.

The first stopper is movably disposed on the opposite side of the first built-in valve by a predetermined distance, while the first stopper is constantly urged by the first spring so as to contact the first built-in valve. , Thereby holding the first built-in valve in a closed position in which the first built-in valve is brought into contact with the inner road wall surface of the first poppet valve to close the inner road;
The second stopper is disposed on the side opposite to the second built-in valve so as to be movable by a predetermined distance, while the second spring is always urged so as to abut against the second built-in valve. The pipe joint according to claim 3 , wherein the second built-in valve is held in a closed position where the second internal valve is brought into contact with the inner wall surface of the second poppet valve to close the inner passage.

The first poppet valve is always urged to the closed position where it is in contact with the flow passage wall surface of the adapter, while the second poppet valve is always urged to the closed position where it is in contact with the flow passage wall surface of the nipple. The pipe joint according to claim 1, 2, 3, or 4 configured.

A female joint in which a first on-off valve that opens and closes the flow path in the flow path of the cylindrical adapter is movably disposed along the flow path, and the flow path is opened and closed in the flow path of the cylindrical nipple. The second on-off valve is a male joint movably disposed along the flow path, and the male joint is connected to the female joint so that the first on-off valve and the second on-off valve are in contact with each other. In the pipe joint in which the flow path of the adapter and the flow path of the nipple communicate with each other by bringing them into contact with each other and moving them to the opposite connection side,
A pipe joint in which communication means for communicating the flow path of the adapter and the flow path of the nipple is provided between the adapter and the nipple.

The communication means, according to claim consisting of a first valve portion provided on the outer peripheral surface of the adapter, and a second valve portion provided on the outer peripheral surface of the nipple, a connecting portion for connecting the two valve unit detachably 6. The pipe joint according to 6 .

The first valve portion includes a cylindrical housing having one end communicating with the flow path of the adapter, a valve body disposed movably in the housing, and the valve body facing the other end side of the housing. The second valve portion includes a cylindrical housing whose one end communicates with the flow path of the nipple, and a valve movably disposed in the housing. And a spring that constantly biases the valve body toward the other end of the housing and holds it in a closed state, and the connecting portion is screwed to the other ends of the housings at both ends of the hose. The pipe joint according to claim 7 , further comprising a cap body having a protrusion that is capable of pressing the valve body toward one end side of the housing when screwed.