JP2004324798A - Connecting structure of connector - Google Patents

Connecting structure of connector Download PDF

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Publication number
JP2004324798A
JP2004324798A JP2003122074A JP2003122074A JP2004324798A JP 2004324798 A JP2004324798 A JP 2004324798A JP 2003122074 A JP2003122074 A JP 2003122074A JP 2003122074 A JP2003122074 A JP 2003122074A JP 2004324798 A JP2004324798 A JP 2004324798A
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Japan
Prior art keywords
joint
main body
elastic ring
groove
cylindrical main
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JP2003122074A
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JP3712712B2 (en
Inventor
Shinichi Nishibori
慎一 西堀
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Fujii Gokin Seisakusho Co Ltd
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Fujii Gokin Seisakusho Co Ltd
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  • Valve Housings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide connecting structure of a connector 1 to be fitted on a cylindrical main body 2 provided in the upstream or the downstream of a gas valve G and allowing re-connection after connecting once. <P>SOLUTION: The outer peripheral surface of the cylindrical main body 2 is formed with a male screw part 20, and the inner peripheral surface of the connector 1 near an end thereof is formed with a female screw part 11 to be screwed to the male screw part 20, and an annular recessed groove part 12 is formed in the circumferential direction to be continued to a depth side. Width of the annular recessed groove 12 is formed larger than the axial length of a range formed with the male screw 20, and first fastening of the connector 1 is completed when the male screw 20 is fitted in the annular recessed groove 12. Second fastening of the connector 1 is completed when the male screw 20 is screwed to the female screw part 11. In the condition that both the fastening are completed, the connector 1 is connected to the cylindrical main body 2 in the peripheral air-tight condition and the loosening-out preventing condition by a loosening-out preventing means. The loosening-out preventing means is set freely to be detached by a tool. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
この発明は、継手の接続構造、特に、ガス栓のガス流入筒部又はガス流出筒部に接続させる継手の接続構造に関するものである。
【0002】
【従来の技術】
ガス器具に直接接続させる形式の従来のガス栓(G)として、例えば、図4に示すものがある。このものは、栓体(32)が収容される栓収容部(33)と、その上流側(図面では右側)に位置し且つ前記栓収容部(33)内に連通するガス流入筒部(3a)と、栓収容部(33)の下流側(図面では左側)に位置し且つ前記栓収容部(33)内に連通するガス流出筒部(3b)とからガス栓本体が構成されており、前記ガス流入筒部(3a)の上流端からガス流出筒部(3b)の下流端まで、ガス流路(34)が同軸上に形成されていると共に、栓体(32)を栓収容部(33)内で回動させることにより前記ガス流路(34)は開閉自在となる。
【0003】
ガス流入筒部(3a)には、同図の二点鎖線に示すように、配管継手(35)を介して可撓配管(36)が接続される。そして、ガス流出筒部(3b)には、ガス器具(4)内にガスを取り入れるガス取入口となるガス取入筒部(40)に螺合接続させるために、器具接続用の接続継手(30)が接続される。
この例の接続継手(30)は、ガス流出筒部(3b)に対して気密性を有し且つ回動自在に取り付けられており、開放端側の内周面にはガス器具(4)のガス取入筒部(40)に螺合可能な雌ネジ部(31)が形成されている。
【0004】
この従来のガス栓(G)では、接続継手(30)の開放端にガス器具(4)のガス取入筒部(40)の先端をねじ合わせすると共に接続継手(30)を締め付け方向に回転させることにより、ガス取入筒部(40)は接続継手(30)内の雌ネジ部(31)にねじ込まれていく。これにより、ガス栓(G)は接続継手(30)を介してガス器具(4)のガス取入筒部(40)に接続されることとなり、可撓配管(36)からのガスをガス器具(4)に供給することができる。
【0005】
【特許文献1】
特開2002−323161号公報
【特許文献2】
特開2002−333076号公報
【0006】
【発明が解決しようとする課題】
しかしながら、この従来のものでは、一旦、ガス栓(G)のガス流出筒部(3b)に装着された接続継手(30)は取り外すことができない構成となっているため、ガス流出筒部(3b)と接続継手(30)との接続部分に、異物混入や気密性不良等が発覚した場合であっても、接続継手(30)のガス流出筒部(3b)への接続のやり直しができない。このため、ガス流出筒部(3b)と接続継手(30)との接続部分に不具合が生じた場合には、ガス栓(G)ごと取り替えなければならず、不経済であった。
本発明は、『ガス栓のガス流路の上流端又は下流端を構成している筒状主体に外嵌接続させる継手の接続構造』において、継手を筒状主体に接続させた後でも接続のやり直しができるようにすることを課題とする。
【0007】
【課題を解決するための手段】
*1項
前述した課題を解決するために講じた本発明の解決手段は、『前記筒状主体の外周面に雄ネジ部が形成され、
前記継手の一端近傍の内周面に、前記雄ネジ部に螺合可能な雌ネジ部が形成されると共にその奥側に連続するように環状凹溝が周方向に沿って形成され、
前記環状凹溝の幅は、前記雄ネジ部の形成範囲の軸方向の長さよりも幅広に設定されており、
前記雄ネジ部が前記環状凹溝に対応したときが第1の締付け完了状態とすると共に、前記雄ネジ部が前記雌ネジ部に螺合状態にあるときが第2の締付け完了状態とし、
前記第1及び第2両締め付け完了状態の各々にて、前記継手は前記筒状主体に外周気密状態に且つ抜け止め状態に接続されるように設定されており、
前記継手を前記筒状主体に対して抜け止め状態に固定する抜け止め手段は、工具によって解除可能に設定されている』ことである。
【0008】
上記手段は次のように作用する。
継手の前記一端をガス栓の前記筒状主体の開放端に外嵌させ、継手の雌ネジ部が筒状主体の雄ネジ部に螺合するように継手を回動させて締付けていく。継手を締付けていくにつれて継手は前記筒状主体に深く外嵌されていき、前記雄ネジ部の全域が前記雌ネジ部に続く環状凹溝に対応したとき、継手は筒状主体に対して外周気密状態を維持しながら空回りする態様となる。この状態が第1の締付け完了状態であり、継手はガス栓の筒状主体に対して回動自在に接続されることとなる。又、前記雄ネジ部が前記雌ネジ部に螺合状態にある状態が、前記継手と前記筒状主体とが相互に回動阻止状態に接続される第2の締付け完了状態となり、この場合も外周気密状態は維持されているものとする。そして、これら第1及び第2各々の締付け完了状態において、前記継手は、抜け止め手段によって前記筒状主体に抜け止め状態に保持される。前記抜け止め手段は、工具を用いて解除することができるように設定されており、前記抜け止め手段を解除させた後、前記第2の締め付け完了状態においては、雄ネジ部と雌ネジ部との螺合を緩めていけば継手を筒状主体から取り外すことができ、又、第1の締付け完了状態においては、継手と筒状主体とを相互に離反する方向に引っ張りながら、雄ネジ部と雌ネジ部とを逆方向から強制的にかみ合わせ、その状態から、上記第2の締付け完了状態の解除時の場合と同様に、螺合を緩める方向に継手を回動させていけば良い。継手を筒状主体から分離し、所定の処理をした後に、両者を上記した要領で再度接続させればよい。
【0009】
*2項
上記1項において、『前記抜け止め手段は、半径方向に縮径又は拡径可能な弾性リングと、前記筒状主体の胴部外周面の基端部近傍の所定位置とそれよりも一定の間隔をおいて開放端側に位置する所定位置とにそれぞれ周方向に沿って形成された一対の第1、第2外溝と、前記継手本体の胴部内周面の所定位置に周方向に沿って形成された内溝とからなり、
前記第1、第2外溝、又は、内溝のどちらか一方は、前記弾性リングを弾性変形させた状態にて全体を収容可能な深さを有すると共に、どちらか他方は、弾性復帰した状態の前記弾性リングの外周部分又は内周部分が浅く嵌り込む深さに設定されており、
前記第1の締付け完了状態にあるとき、前記内溝は前記第1外溝に対応し、前記第2の締付け完了状態にあるとき、前記内溝は前記第2外溝に対応するように設定されていると共に、その対応部に前記弾性リングが配設される構成とした』ものでは、弾性リングは、縮径方向に弾性変形可能なものでも、拡径方向に弾性変形可能なものでもどちらのものでも採用可能であり、前者のものでは、弾性リングは筒状主体に設けた外溝内に弾性変形した状態で全体が収容され、後者のものでは、弾性リングは継手に設けた内溝内に弾性変形した状態で全体が収容される。弾性リングを外溝又は内溝に弾性変形させた状態で収容させながら、継手を筒状主体に外嵌させる。継手を筒状主体に対して回動自在に取り付けたい場合には、内溝が第1外溝に対応した時点で前記弾性リングが弾性復帰するように設定しておけば良く、継手を筒状主体に対して相対回動阻止状態に取り付けたい場合には、内溝が第2外溝に対応した時点で前記弾性リングが弾性復帰するように設定しておけば良い。
【0010】
弾性リングが拡径方向に弾性復帰するものでは、弾性復帰したとき、弾性リングの外周部分が内溝に浅く嵌り、弾性リングが縮径方向に弾性復帰するものでは、弾性リングの内周部分が第1又は第2外溝に浅く嵌る態様となり、上記第1又は第2の締付け完了状態において前記弾性リングは継手を筒状主体に抜け止め状態に接続させる抜け止めリングとして機能することとなる。この接続状態を解除したい場合には、工具を用いて強制的に継手の締付けを緩める方向に回動させる。継手の、筒状主体の開放端側への移動に伴って、前記弾性リングは外溝又は内溝の開放端縁の一方に押されて弾性変形させられて内溝から外溝内へ又は外溝から内溝内へ押し出される。これが前記抜け止め手段の抜け止めを解除した状態であり、この状態で継手の螺合を緩めれば、継手を筒状主体から取り外すことができる。
【0011】
*3項
上記1項において、『前記弾性リングは縮径方向に弾性変形可能とし、前記継手には、その胴部を半径方向に貫通し且つ前記内溝内に連通する貫通孔が複数箇所に形成されており、通常の使用時においては、前記貫通孔には通気性防水部材が充填されている』ものでは、前記弾性リングは、継手の接続完了状態にて弾性復帰することにより、継手の内溝に嵌り込む態様となる。その内溝に連通するように形成された貫通孔には継手の使用中においては、通気性防水部材が充填されている。前記通気性防水部材は、外部から継手本体内へ雨水等の液体は通さないが、継手本体内から外部へ気体は通過させることができるものであり、前記貫通孔からガス漏れを検出することができ、前記貫通孔は、ガス漏れ検知用のガスの逃がし通路として機能させることができる。又、継手の筒状主体への接続作業をやり直したい場合には、前記貫通孔から通気性防水部材を取り除き、工具を前記複数の貫通孔に同時に差し込んで、内溝の底部に当接している弾性リングを外方から押すことにより、強制的に縮径方向に弾性変形させて、筒状主体の外溝に押し込めば、抜け止め手段を解除することができる。
【0012】
*4項
上記各項において、『前記筒状主体の基端部には筒体が外嵌されており、前記継手の前記一端が前記筒体に当接するとき、前記継手は前記第2の締付け完了状態となるように設定されている』ものでは、継手を筒状主体に対して相対回動阻止状態に取り付けたい、すなわち、第2の締付け完了状態としたいときには、予め、前記筒状主体の基端部に筒体を外嵌させておく。そして、継手の一端が前記筒体に当接するまで螺合させていけばよい。このように、前記筒体は、継手の一端と筒状主体の基端部との間を一定の間隔に保持するスペーサとして機能することとなる。
【0013】
【発明の効果】
本発明では、継手がガス栓の筒状主体に抜け止め状態に接続された後でも、工具によって前記抜け止め手段を解除できるようにして継手を筒状主体から取り外すことができるようにしたから、両者の接続部において異物の混入や気密性不良等の問題が生じた場合に、継手を筒状主体から一旦取り外して継手の接続のやり直しができる。これにより、継手の接続に不具合があってもガス栓ごと交換する必要がないから、無駄がなく、又、前記継手が、配管接続用の継手の場合、サイズ違い等によって配管が変更されるとき、継手ごと付け替えることができるので、使い勝手が良いものとなる。
【0014】
2項のものでは、上記の効果に加えて、継手が第1又は第2の締付け完了状態に接続されたかどうかは、弾性リングの弾性復帰に伴う感触と音によって認識することができるから、作業者が継手の接続完了を容易に確認することができる。又、抜け止め手段の構成及び構造が簡単であるといった効果がある。
【0015】
さらに、3項のものでは、ガスの逃がし通路を、弾性リングを弾性変形させるための工具挿通孔として利用することができるといった効果がある。
【0016】
4項のものでは、継手を筒体に当接するまで継手を締付けるだけで、継手を第2の締付け完了状態に接続することができるから、継手をガス栓の筒状主体に固定状態に接続させる際に、締付け過ぎたり、締付けが足りなかったりする不都合がない。
【0017】
【発明の実施の形態】
以下、本願発明の実施の形態を、図面に基づいて説明する。
図1に示すものは、本発明の第1番目の実施の形態の継手の接続構造の断面図である。
本発明の継手(1)を外嵌接続させる筒状主体(2)は、従来のものと同様に、ガス栓(G)のガス流出筒部(3b)とし、継手(1)も又、従来のものと同様に、ガス器具(図示せず)のガス取入用のガス取入筒部に螺合接続させるための接続継手とする。
【0018】
まず、継手(1)について説明する。
継手(1)の内周面には、一端側(図面では右側)から順に、内溝(10)、雌ネジ部(11)、環状凹溝(12)が形成されており、他端側の開放端には、前記ガス器具のガス取入筒部に螺合させるための接続ネジ部(13)が形成されている。又、内溝(10)の環状底部の相互に対向する位置には、継手(1)の胴部を貫通して外方へ開放する貫通孔(14)が形成されており、通常の使用状態においては、前記貫通孔(14)には、通気性防水部材(15)が充填されている。
【0019】
次に、筒状主体(2)について説明する。
筒状主体(2)の外周面には、基端部側から順に、第1、第2外溝(21)(22)が所定の間隔をおいて形成されていると共に、前記第2外溝(22)から開放端側へ所定の間隔をおいて雄ネジ部(20)が形成されている。そして、開放端近傍の外周面に形成した環状凹溝内に、Oリング(23)が嵌め込まれている。
尚、前記継手(1)の環状凹溝(12)の幅は、前記雄ネジ部(20)の形成範囲の軸線方向の長さよりも大きく設定されているものとする。
【0020】
そして、継手(1)を筒状主体(2)に抜け止め状態に接続させるための抜け止め用の弾性リング(5)は、縮径方向に弾性変形可能なC字状リングを採用しており、縮径方向に弾性変形させた状態にて、第1外溝(21)又は第2外溝(22)に全体が収容可能となるように、前記第1外溝(21)及び第2外溝(22)の深さは、弾性リング(5)の断面の直径に略一致するように設定されており、又、内溝(10)の深さは、弾性リング(5)の断面の半径程度に設定されているものとする。
【0021】
図1は、継手(1)を筒状主体(2)に回動自在に接続させた接続完了状態を示している。この接続態様で接続させるためには、前記弾性リング(5)は、第1外溝(21)に対応させておく。そして、継手(1)を前記一端側から前記筒状主体(2)に外嵌させていき、継手(1)の雌ネジ部(11)の前記一端側の山部が、前記筒状主体(2)の雄ネジ部(20)の開放端側の山部に当接した時点で、継手(1)を締付け方向に回動させる。これにより、雌ネジ部(11)に雄ネジ部(20)が螺合されることにより、継手(1)は筒状主体(2)の基端部側へ移動していき、前記弾性リング(5)を縮径方向に弾性変形させて第1外溝(21)内に収容させながら継手(1)を締め付けていくことにより、筒状主体(2)は、継手(1)内に深く差し込まれていく。
【0022】
そして、雄ネジ部(20)が継手(1)の環状凹溝(12)に対応した時点で、継手(1)は筒状主体(2)に対して空回りすることとなり、継手(1)と筒状主体(2)とのそれ以上の軸線方向の相対移動が阻止されると共に、このとき、筒状主体(2)の第1外溝(21)が継手(1)の内溝(10)にちょうど対向するように設定されており、これにより、第1外溝(21)内に弾性変形状態に収容されていた弾性リング(5)が、内溝(10)の底部へ向かって拡径方向に勢い良く弾性復帰する。又、Oリング(23)が継手(1)の雄ネジ部(20)よりもさらに奥側の内周面に気密状態に押圧する態様となる。
【0023】
これが、継手(1)の筒状主体(2)に対する第1の締付け完了状態であり、この状態において、継手(1)は筒状主体(2)に対して回動自在に且つ外周気密状態に接続されると共に、その接続状態は弾性リング(5)及び雄ネジ部(20)と雌ネジ部(11)によって抜け止め状態に保持されていることとなる。
【0024】
継手(1)と筒状主体(2)とを上述したように接続した後で、その接続部に異物が混入していることや気密性が悪い等の不具合が発覚した場合、継手(1)を一旦筒状主体(2)から取り外して接続をやり直すことができる。
【0025】
そのためには、継手(1)の他端近傍の外周面の工具対応部(16)に工具を対応させて、継手(1)を筒状主体(2)から引き抜く方向へ引っ張ると共に、雌ネジ部(11)の奥側の山部が、雄ネジ部(20)の基端部側の山部に当接した時点で、継手(1)を緩める方向に回動させ、両者をネジ対偶させる。締付けを緩める方向へ回動させることにより、継手(1)は筒状主体(2)の基端部から離反する方向へ移動させられ、そのとき、内溝(10)内の弾性リング(5)は、前記内溝(10)の一端側の開放端縁に押されて、縮径方向に強制的に弾性変形させられ、内溝(10)から脱出させられて第1外溝(21)内に戻されることとなる。この場合の、継手(1)の取外し力については、内溝(10)の深さにより調整できる。内溝(10)の深さを弾性リング(5)の半径より大きくしていくほど取外し力は大きくなり、逆に、内溝(10)の深さを弾性リング(5)の半径より小さくしていくほど取外し力は小さくなる。従って、継手(1)の取外し力の設定においては弾性リング(5)の線径と内溝(10)の深さで調整すれば良い。
【0026】
この実施の形態のものでは、継手(1)の取外しをさらに容易なものとするために、前記一対の貫通孔(14)に充填されている通気性防水部材(15)をそれぞれ取り外し、貫通孔(14)の外方開放端から、差込工具(17)の先端を、それぞれ同時に差し込んで、弾性リング(5)を内方へ押圧することとした。これにより、弾性リング(5)は縮径方向に強制的に弾性変形され、この縮径状態を維持しながら、継手(1)を緩める方向に回動させれば、弾性リング(5)は第1外溝(21)内へ戻され、継手(1)は筒状主体(2)から引き抜くことができる。
【0027】
取り外された後の継手(1)及び筒状主体(2)は、接続前の状態と同じであるから、異物の除外等所定の処置をした後、再度、上記した要領で接続させればよい。
尚、前記貫通孔(14)を工具差込穴として使用しない場合に、貫通孔(14)に充填されている通気性防水部材(17)は、ガス等の気体は通過させるが、雨水等の液体は通過させない部材であり、これを充填させておくことにより、貫通孔(14)からの雨水等の内部への浸入を阻止することができる。又、万一、継手(1)と筒状主体(2)の接続部分の気密性が不完全で、ガス漏れが発生した場合、漏れ出たガスは、継手(1)と筒状主体(2)の間を通って、貫通孔(14)を介して外部に漏れ出ることとなる。このように、貫通孔(14)はガスの逃がし通路としても機能させることができる。このガス漏れは配管の検査時の圧力低下で検出できる。
【0028】
次に、第2番目の実施の形態の継手の構造を、図2に基づいて説明する。
この実施の形態の継手(1)及び筒状主体(2)の構造は、上記した第1番目の実施の形態のそれらと同様の構成のものが採用可能であるが、この実施の形態では、継手(1)を筒状主体(2)に対して固定された状態(相対回動阻止状態)に接続させる、上記した第2の締付け完了状態を構成するものとする。
【0029】
この実施の形態のガス栓(G)の筒状主体(2)の基端部には、筒状のスペーサ(50)が予め装着されており、弾性リング(5)は、縮径方向に弾性変形させた状態で、第2外溝(22)に収容させておく。尚、スペーサ(50)の幅は、継手(1)の雌ネジ部(11)が筒状主体(2)の雄ネジ部(20)に螺合した状態で且つ前記第2外溝(22)が内溝(10)に対応したときにおける前記継手(1)の前記一端側の開放端面(18)と前記ガス栓(G)との間に形成される間隙部の幅(L)に略一致するように設定されている。
【0030】
筒状主体(2)の基端部にスペーサ(50)を装着させた後に、継手(1)を前記一端から筒状主体(2)に外嵌させていき、雌ネジ部(11)と雄ネジ部(20)とを螺合させていくと、前記継手(1)の前記開放端面(18)がスペーサ(50)に当接した時点で、第2外溝(22)内の弾性リング(5)が内溝(10)内へ弾性復帰する。これにより、継手(1)は、筒状主体(2)の基端部側への移動はスペーサ(50)と弾性リング(5)によって阻止されることとなるから、継手(1)は締付け方向に回動させることはできない。又、筒状主体(2)の開放端側への移動は、弾性リング(5)によって阻止されることとなるから、継手(1)は締付けを緩める方向にも回動させることができない。このように、継手(1)は筒状主体(2)に対して相対回動阻止状態に接続されることとなる。
【0031】
この接続状態において、Oリング(23)は、継手(1)の環状凹溝(12)よりも奥側の内周面に気密状態に押圧するように、雄ネジ部(20)からOリング(23)までの距離と環状凹溝(12)の幅とは所定の寸法関係に設定されている。
【0032】
この接続状態にある継手(1)と筒状主体(2)とを分離したい場合は、上記第1番目の実施の形態の分解方法と同様に、継手(1)の工具対応部(16)に工具を対応させて強制的に回動させると共に、内溝(10)に貫通するように設けられている貫通孔(14)から、差込工具を差し込んで、弾性リング(5)を強制的に縮径方向に弾性変形させて、第2外溝(22)内に押し込みながら、継手(1)を緩める方向に回動させれば良い。
【0033】
上記第1、第2実施の形態で採用した継手(1)及び筒状主体(2)は共に同じ構造のものであるが、接続方法によって、筒状主体(2)に対して、回動式の継手(1)としても、固定式の継手(1)としても接続させることができる。よって、作業者が、現場において、継手(1)と筒状主体(2)とを相対回動可能に接続させるか、固定状態に接続させるかを選択して接続作業を行うことができることとなるから、継手の用途範囲が広がる上に、継手(1)と筒状主体(2)とは取外し可能に接続されているから、接続後に異物の混入や気密不良が発覚した場合、一旦取り外した後に接続し直すことができるので無駄がない。
【0034】
又、上記各実施の形態では、弾性リング(5)は、縮径方向に弾性変形するものを採用したが、拡径方向に弾性変形するものも採用可能である。その場合、内溝(10)の深さを弾性リング(5)の断面の直径に略一致する程度に深く設定しておき、第1外溝(21)又は第2外溝(22)の深さを弾性リング(5)の断面の半径程度の浅いものとしておき、弾性リング(5)を内溝(10)に収容させた状態で継手(1)と筒状主体(2)とを接続させる構成としても良い。
【0035】
但し、第1番目の実施の形態の場合のように、接続完了時に、弾性リング(5)が筒状主体(2)の基端部側の第1外溝(21)と内溝(10)との間で抜け止め状態となる構成のものにおいては、弾性リング(5)は、上記第1番目の実施の形態の場合のように、縮径方向に弾性変形されて予め第1外溝(21)に収容される構成のものを採用するのが望ましい。
【0036】
図3に示すものは、第3番目の実施の形態の継手の接続構造である。この実施の形態での筒状主体(2)は、図4に示した従来のガス栓(G)のガス流入筒部(3a)に相当するものとし、これに接続させる継手(1)は、可撓管(41)を接続させるための可撓管継手とする。
筒状主体(2)の構造は、上記した第1、第2番目の実施の形態におけるガス流入筒部(3a)としての筒状主体(2)と同様であり、外周面には基端部側から順に、一対の第1、第2外溝(21)(22)及び雄ネジ部(20)が形成されている。
【0037】
特に、この実施例のものでは、筒状主体(2)に対して継手を相対回動阻止状態に接続させるために、上記した第2番目の実施の形態のものと同様に、弾性リング(5)は第2外溝(22)に嵌め込まれていると共に、筒状主体(2)の基端部には、スペーサ(50)が配設されている。
【0038】
可撓管接続用の継手(1)は、一端が前記筒状主体(2)に外嵌接続可能で且つ可撓管(41)の先端がシール材(55)と共に差し込まれる環状溝部(54)が他端に向かって開放するように形成されている継手本体(51)と、前記継手本体(51)の前記他端に螺合させる締付筒(52)と、前記締付筒(52)の螺合に伴って、前記環状溝部(54)内に差し込まれる可撓管(41)を抜け止め状態に押圧するリテーナ(53)とから構成されており、前記継手本体(51)の前記一端側の内周面は、上記した第1、第2番目の実施の形態の継手(1)と同様に、前記一端側から順に、内溝(10)、雌ネジ部(11)、環状凹溝(12)が形成されている。尚、内溝(10)に連通するように、複数の貫通孔(14)が形成されており、前記貫通孔(14)には通常の使用時には、通気性防水部材(15)が充填されている。
【0039】
この実施の形態のものでは、まず、ガス栓(G)のガス流入筒部(3a)としての筒状主体(2)に継手本体(51)のみを外嵌接続させる。接続の要領は、上記第2番目の実施の形態の場合と同様であり、前記継手本体(51)の前記一端面がスペーサ(50)に当接するまで雌ネジ部(11)を雄ネジ部(20)に螺合させると、前記弾性リング(5)の作用により、継手本体(51)は筒状主体(2)に抜け止め状態で且つ相対回動阻止状態に固定されることとなる(第2の締付け完了状態)。
【0040】
その後、先端部分に予めリテーナ(53)及び締付筒(52)を装着させた可撓管(41)を、前記継手本体(51)の他端側から差込み、可撓管(41)を前記環状溝部(54)内に差し込むと共に、締付筒(52)を継手本体(51)に最終締付け位置に達するまで締付ければ、ガス栓(G)のガス流入筒部(3a)に可撓管継手(1)が接続され、前記可撓管継手(1)を介して可撓管(41)が接続される態様となる。
【0041】
又、継手本体(51)は、貫通孔(14)から工具を差し込んで弾性リング(5)を弾性変形させながら、継手本体(51)を強制的にネジを緩める方向に回動させることにより、ガス栓(G)から取り外すことができる。
【0042】
尚、この実施の形態では、継手本体(51)をガス流入筒部(3a)に対して、相対回動阻止状態に接続したが、回動自在に接続させる場合には、スペーサ(50)を取り除き、継手本体(51)の環状凹溝(12)が、ガス流入筒部(3a)としての筒状主体(2)の雄ネジ部(20)に対応するまで締付ければ良い(第1の締付け完了状態)。
【図面の簡単な説明】
【図1】本願発明の第1番目の実施の形態における継手の接続構造を示す断面図。
【図2】本願発明の第2番目の実施の形態における継手の接続構造を示す断面図。
【図3】本願発明の第3番目の実施の形態における継手の接続構造を示す断面図。
【図4】従来のガス栓への継手の接続態様を示す断面図。
【符号の説明】
(1)・・・・・・継手
(11)・・・・・・雄ネジ部
(12)・・・・・・環状凹溝
(2)・・・・・・筒状主体
(20)・・・・・・雄ネジ部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a connection structure of a joint, and more particularly to a connection structure of a joint connected to a gas inlet tube or a gas outlet tube of a gas stopper.
[0002]
[Prior art]
As a conventional gas stopper (G) of the type directly connected to a gas appliance, for example, there is one shown in FIG. The plug housing (33) in which the plug (32) is housed and a gas inflow cylinder (3a) located on the upstream side (right side in the drawing) and communicating with the plug housing (33). ) And a gas outlet cylinder (3b) located downstream (left side in the drawing) of the plug housing portion (33) and communicating with the inside of the plug housing portion (33). A gas flow path (34) is formed coaxially from the upstream end of the gas inflow cylinder (3a) to the downstream end of the gas outflow cylinder (3b), and the plug (32) is connected to the plug housing ( The gas flow path (34) can be freely opened and closed by rotating the gas flow path (33).
[0003]
A flexible pipe (36) is connected to the gas inflow cylinder (3a) via a pipe joint (35) as shown by a two-dot chain line in the figure. The gas outlet tube (3b) is screwed to a gas inlet tube (40) serving as a gas inlet for taking gas into the gas device (4). 30) is connected.
The connection joint (30) of this example has airtightness and is rotatably attached to the gas outflow cylinder (3b), and has an inner peripheral surface on the open end side of the gas appliance (4). A female screw part (31) that can be screwed into the gas intake cylinder part (40) is formed.
[0004]
In this conventional gas tap (G), the distal end of the gas intake cylinder (40) of the gas appliance (4) is screwed to the open end of the connection joint (30), and the connection joint (30) is rotated in the tightening direction. By doing so, the gas intake cylinder (40) is screwed into the female thread (31) in the connection joint (30). As a result, the gas tap (G) is connected to the gas intake cylinder (40) of the gas appliance (4) via the connection joint (30), and the gas from the flexible pipe (36) is supplied to the gas appliance. (4) can be supplied.
[0005]
[Patent Document 1]
JP 2002-323161 A
[Patent Document 2]
JP-A-2002-333076
[0006]
[Problems to be solved by the invention]
However, in this conventional device, the connection joint (30) once attached to the gas outlet tube portion (3b) of the gas stopper (G) cannot be removed. ) And the connection joint (30), even if foreign matters are found or poor airtightness is detected, the connection of the connection joint (30) to the gas outlet tube portion (3 b) cannot be performed again. For this reason, when a failure occurs in the connection portion between the gas outflow cylinder (3b) and the connection joint (30), the entire gas plug (G) must be replaced, which is uneconomical.
The present invention relates to a connection structure for a joint that is externally connected to a cylindrical main body that constitutes an upstream end or a downstream end of a gas flow path of a gas tap. The task is to be able to start over.
[0007]
[Means for Solving the Problems]
* 1
The solution of the present invention taken to solve the above-described problem is that a male screw portion is formed on the outer peripheral surface of the cylindrical main body,
On the inner peripheral surface near one end of the joint, a female screw portion capable of being screwed to the male screw portion is formed, and an annular groove is formed along the circumferential direction so as to be continuous with the inner side thereof,
The width of the annular groove is set to be wider than the axial length of the forming range of the male screw portion,
When the male screw portion corresponds to the annular groove, the first tightening is completed, and when the male screw portion is screwed to the female screw portion, the second tightening is completed,
In each of the first and second tightening completed states, the joint is set to be connected to the cylindrical main body in an outer peripheral airtight state and a retaining state,
The retaining means for fixing the joint in the retaining state with respect to the cylindrical main body is set to be releasable by a tool. "
[0008]
The above means operates as follows.
The one end of the joint is externally fitted to the open end of the tubular main body of the gas stopper, and the joint is rotated and tightened so that the female screw portion of the joint is screwed into the male screw portion of the cylindrical main body. As the joint is tightened, the joint is deeply fitted to the cylindrical main body, and when the entire area of the male screw part corresponds to the annular groove following the female screw part, the joint is outer peripheral to the cylindrical main body. In this mode, the vehicle runs idle while maintaining the airtight state. This state is the first tightening completed state, and the joint is rotatably connected to the cylindrical main body of the gas stopper. Further, the state in which the male screw portion is screwed to the female screw portion is a second tightening completed state in which the joint and the cylindrical main body are connected to each other in a rotation-blocking state. It is assumed that the outer peripheral airtight state is maintained. In each of the first and second tightening completed states, the joint is held in the tubular main body by the retaining means in the retaining state. The retaining means is set so that it can be released using a tool, and after releasing the retaining means, in the second tightening completed state, the male screw part and the female screw part If the screw is loosened, the joint can be removed from the cylindrical main body, and in the first tightening completed state, the joint and the cylindrical main body are pulled apart from each other while pulling the joint and the cylindrical main body away from each other. The female screw portion is forcibly engaged with the female screw portion from the opposite direction, and the joint may be rotated in the direction in which the screwing is loosened from that state, as in the case of releasing the second tightening completed state. After the joint is separated from the cylindrical main body and subjected to a predetermined treatment, the two may be connected again in the manner described above.
[0009]
* 2
In the above-mentioned item 1, it is preferable that "the retaining means is an elastic ring capable of reducing or increasing the diameter in the radial direction, a predetermined position near the base end of the outer peripheral surface of the body of the tubular main body, and a predetermined distance therebetween. And a pair of first and second outer grooves formed along the circumferential direction at a predetermined position located on the open end side, and at a predetermined position on the inner circumferential surface of the body of the joint body along the circumferential direction. Consists of the formed inner groove,
Either the first or second outer groove or the inner groove has a depth capable of accommodating the whole in a state where the elastic ring is elastically deformed, and the other one is in an elastically restored state. The outer peripheral portion or the inner peripheral portion of the elastic ring is set to a depth at which it is fitted shallowly,
The inner groove corresponds to the first outer groove when the first tightening is completed, and the inner groove corresponds to the second outer groove when the second tightening is completed. And the elastic ring is disposed at the corresponding portion of the elastic ring.), The elastic ring can be either elastically deformable in the diameter decreasing direction or elastically deformable in the diameter increasing direction. In the former, the elastic ring is entirely accommodated in an outer groove provided in the cylindrical main body in an elastically deformed state. In the latter, the elastic ring is provided in the inner groove provided in the joint. The whole is accommodated in an elastically deformed state. The joint is fitted to the cylindrical main body while the elastic ring is accommodated in the outer groove or the inner groove in a state of being elastically deformed. When the joint is to be rotatably attached to the cylindrical main body, the elastic ring may be set to return elastically when the inner groove corresponds to the first outer groove. If it is desired to mount the elastic ring relative to the main body, the elastic ring may be set to return elastically when the inner groove corresponds to the second outer groove.
[0010]
When the elastic ring elastically returns in the radially expanding direction, when the elastic ring returns elastically, the outer peripheral portion of the elastic ring fits into the inner groove shallowly. In the first or second outer groove, the elastic ring functions as a retaining ring for connecting the joint to the tubular main body in a retaining state in the first or second tightening completed state. In order to release this connection state, the joint is forcibly rotated in a direction to loosen the tightening of the joint by using a tool. As the joint moves toward the open end side of the tubular main body, the elastic ring is pushed by one of the open end edges of the outer groove or the inner groove and is elastically deformed to move the inner ring from the inner groove to the outer groove. It is extruded from the groove into the inner groove. This is a state in which the retaining of the retaining means is released. If the screwing of the coupling is loosened in this state, the coupling can be removed from the cylindrical main body.
[0011]
* 3
In the above paragraph 1, "the elastic ring is elastically deformable in a diameter decreasing direction, and the joint has a plurality of through-holes penetrating a body thereof in a radial direction and communicating with the inner groove. In normal use, the through-hole is filled with a breathable waterproof member.'The elastic ring is elastically restored when the connection of the joint is completed. It becomes a mode of fitting. The through hole formed to communicate with the inner groove is filled with a breathable waterproof member during use of the joint. The breathable waterproof member does not allow liquid such as rainwater to pass from the outside to the inside of the joint body, but allows gas to pass from the inside of the joint body to the outside, and can detect gas leakage from the through hole. The through-hole can function as a gas escape passage for gas leak detection. When it is desired to reconnect the joint to the tubular main body, the breathable waterproof member is removed from the through-hole, and a tool is simultaneously inserted into the plurality of through-holes to abut against the bottom of the inner groove. When the elastic ring is pushed from the outside, the elastic ring is forcibly elastically deformed in the diameter-reducing direction and pushed into the outer groove mainly composed of a cylinder, whereby the retaining means can be released.
[0012]
* 4
In each of the above paragraphs, "a cylindrical body is fitted to the base end of the cylindrical main body, and when the one end of the joint abuts on the cylindrical body, the joint is in the second tightening completed state. When the joint is to be mounted in a state of being prevented from rotating relative to the cylindrical main body, that is, when the second tightening is to be completed, the base end of the cylindrical main body must be set in advance. The cylindrical body is fitted outside. Then, the joint may be screwed until one end of the joint comes into contact with the cylindrical body. As described above, the tubular body functions as a spacer that holds a fixed interval between one end of the joint and the base end of the tubular main body.
[0013]
【The invention's effect】
In the present invention, even after the coupling is connected to the tubular main body of the gas stopper in a retaining state, the coupling can be removed from the cylindrical main body by allowing the retaining means to be released by a tool, When a problem such as mixing of foreign matter or poor airtightness occurs at the connection portion between the two, the joint can be temporarily removed from the tubular main body and connection of the joint can be performed again. Thereby, even if there is a problem in the connection of the joint, there is no need to replace the entire gas plug, so there is no waste, and when the joint is a joint for piping connection, when the piping is changed due to a difference in size etc. Since the entire joint can be replaced, it is easy to use.
[0014]
In the case of the item (2), in addition to the effects described above, whether the joint is connected to the first or second tightening completed state can be recognized by the feel and sound accompanying the elastic return of the elastic ring. A person can easily confirm the connection completion of the joint. Further, there is an effect that the structure and structure of the retaining means are simple.
[0015]
Further, in the case of the third aspect, there is an effect that the gas release passage can be used as a tool insertion hole for elastically deforming the elastic ring.
[0016]
In the case of the item (4), since the joint can be connected to the second tightening completed state only by tightening the joint until the joint comes into contact with the cylindrical body, the joint is fixedly connected to the cylindrical main body of the gas stopper. In this case, there is no inconvenience of overtightening or insufficient tightening.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a joint connection structure according to a first embodiment of the present invention.
The tubular main body (2) to which the joint (1) of the present invention is externally connected is a gas outflow tubular portion (3b) of a gas stopper (G), similarly to the conventional one, and the joint (1) is also a conventional one. Similarly to the above, a connection joint for screwing connection to a gas intake cylinder portion for gas intake of a gas appliance (not shown).
[0018]
First, the joint (1) will be described.
On the inner peripheral surface of the joint (1), an inner groove (10), a female screw portion (11), and an annular groove (12) are formed in order from one end side (the right side in the drawing). At the open end, a connection screw portion (13) for screwing with the gas intake tube portion of the gas appliance is formed. Further, a through hole (14) is formed at a position of the annular bottom portion of the inner groove (10) opposed to each other to penetrate the body of the joint (1) and open outward. In (2), the through hole (14) is filled with a breathable waterproof member (15).
[0019]
Next, the cylindrical main body (2) will be described.
First and second outer grooves (21) and (22) are formed at predetermined intervals on the outer peripheral surface of the cylindrical main body (2) from the base end side, and the second outer groove is formed. An external thread (20) is formed at a predetermined interval from (22) to the open end side. An O-ring (23) is fitted into an annular groove formed on the outer peripheral surface near the open end.
It is assumed that the width of the annular groove (12) of the joint (1) is set to be larger than the axial length of the formation range of the male screw portion (20).
[0020]
The retaining elastic ring (5) for connecting the joint (1) to the cylindrical main body (2) in a retaining state employs a C-shaped ring that can be elastically deformed in the diameter-reducing direction. The first outer groove (21) and the second outer groove (21) are formed so that the first outer groove (21) or the second outer groove (22) can be entirely accommodated in a state of being elastically deformed in the diameter reducing direction. The depth of the groove (22) is set to substantially match the diameter of the cross section of the elastic ring (5), and the depth of the inner groove (10) is set to the radius of the cross section of the elastic ring (5). It is assumed that it is set to the degree.
[0021]
FIG. 1 shows a connection completed state in which the joint (1) is rotatably connected to the tubular main body (2). In order to connect in this connection mode, the elastic ring (5) is made to correspond to the first outer groove (21). Then, the joint (1) is externally fitted to the cylindrical main body (2) from the one end side, and the crest portion on the one end side of the female screw portion (11) of the joint (1) is connected to the cylindrical main body (2). At the point of time when the abutment on the open end side of the male screw portion (20) of (2) comes into contact, the joint (1) is turned in the tightening direction. As a result, when the male screw portion (20) is screwed into the female screw portion (11), the joint (1) moves toward the base end of the tubular main body (2), and the elastic ring ( By tightening the joint (1) while elastically deforming (5) in the diameter-reducing direction so as to be accommodated in the first outer groove (21), the tubular main body (2) is inserted deeply into the joint (1). I will go.
[0022]
When the male screw portion (20) corresponds to the annular groove (12) of the joint (1), the joint (1) idles with respect to the cylindrical main body (2), and the joint (1) Further axial movement with respect to the cylindrical main body (2) is prevented, and at this time, the first outer groove (21) of the cylindrical main body (2) is connected to the inner groove (10) of the joint (1). The elastic ring (5) housed in the first outer groove (21) in an elastically deformed state is expanded toward the bottom of the inner groove (10). It returns elastically in the direction. Further, the O-ring (23) presses the inner peripheral surface further deeper than the male screw portion (20) of the joint (1) in an airtight state.
[0023]
This is a first tightening completed state of the joint (1) with respect to the cylindrical main body (2). In this state, the joint (1) is rotatable with respect to the cylindrical main body (2) and is in an outer peripheral airtight state. While being connected, the connected state is held in a state of being prevented from falling off by the elastic ring (5), the male screw portion (20), and the female screw portion (11).
[0024]
After connecting the joint (1) and the tubular main body (2) as described above, if a problem such as foreign matter being mixed in the connection or poor airtightness is detected, the joint (1) is used. Can be once removed from the tubular main body (2) and the connection can be made again.
[0025]
To this end, the tool is made to correspond to the tool corresponding portion (16) on the outer peripheral surface near the other end of the joint (1), and the joint (1) is pulled in a direction of being pulled out from the cylindrical main body (2), and the female screw portion is formed. When the crest on the back side of (11) comes into contact with the crest on the base end side of the male screw part (20), the joint (1) is turned in a loosening direction, and the two are screwed together. By rotating the joint in a direction to loosen the tightening, the joint (1) is moved in a direction away from the base end of the tubular main body (2), and at that time, the elastic ring (5) in the inner groove (10) is moved. Is pushed by the open edge at one end of the inner groove (10), and is forcibly elastically deformed in the radially reduced direction, and escapes from the inner groove (10) to be in the first outer groove (21). Will be returned to. In this case, the detaching force of the joint (1) can be adjusted by the depth of the inner groove (10). As the depth of the inner groove (10) is made larger than the radius of the elastic ring (5), the detaching force becomes larger, and conversely, the depth of the inner groove (10) is made smaller than the radius of the elastic ring (5). The lower the force, the lower the removal force. Therefore, the setting of the detaching force of the joint (1) may be adjusted by the wire diameter of the elastic ring (5) and the depth of the inner groove (10).
[0026]
In this embodiment, in order to make it easier to remove the joint (1), the air-permeable waterproof members (15) filled in the pair of through holes (14) are removed, and the through holes are removed. The tip of the insertion tool (17) is simultaneously inserted from the outer open end of (14), and the elastic ring (5) is pressed inward. As a result, the elastic ring (5) is forcibly elastically deformed in the diameter reducing direction. If the joint (1) is rotated in the loosening direction while maintaining the reduced diameter state, the elastic ring (5) becomes the second ring. Returning into the outer groove (21), the joint (1) can be pulled out of the tubular main body (2).
[0027]
Since the joint (1) and the tubular main body (2) after being removed are in the same state as before the connection, after performing a predetermined treatment such as exclusion of foreign matter, the connection may be made again in the manner described above. .
When the through-hole (14) is not used as a tool insertion hole, the gas-permeable waterproof member (17) filled in the through-hole (14) allows gas such as gas to pass therethrough, but does not allow rainwater or the like to pass through. It is a member through which the liquid does not pass. By filling the member, it is possible to prevent rainwater or the like from entering the inside from the through hole (14). If the joint between the joint (1) and the tubular body (2) is incompletely airtight and gas leaks, the leaked gas is transferred to the joint (1) and the tubular body (2). ), And leaks out through the through-hole (14). Thus, the through-hole (14) can also function as a gas release passage. This gas leak can be detected by a pressure drop during the inspection of the piping.
[0028]
Next, the structure of the joint according to the second embodiment will be described with reference to FIG.
The structure of the joint (1) and the tubular main body (2) of this embodiment can be the same as those of the first embodiment described above, but in this embodiment, The joint (1) is connected to the cylindrical main body (2) in a fixed state (relative rotation preventing state), and constitutes the second tightening completed state described above.
[0029]
A cylindrical spacer (50) is mounted in advance at the base end of the cylindrical main body (2) of the gas stopper (G) of this embodiment, and the elastic ring (5) is elastic in the diameter reducing direction. In a deformed state, it is stored in the second outer groove (22). The width of the spacer (50) is set such that the female screw portion (11) of the joint (1) is screwed into the male screw portion (20) of the cylindrical main body (2) and the second outer groove (22). Substantially corresponds to the width (L) of the gap formed between the open end face (18) at the one end of the joint (1) and the gas plug (G) when corresponds to the inner groove (10). Is set to
[0030]
After the spacer (50) is attached to the base end of the cylindrical main body (2), the joint (1) is externally fitted to the cylindrical main body (2) from the one end, and the female screw part (11) and the male part are connected. When the screw portion (20) is screwed together, when the open end face (18) of the joint (1) comes into contact with the spacer (50), the elastic ring (22) in the second outer groove (22). 5) elastically returns into the inner groove (10). As a result, the joint (1) is prevented from moving toward the base end of the tubular main body (2) by the spacer (50) and the elastic ring (5). Cannot be rotated. In addition, since the movement of the cylindrical main body (2) toward the open end is prevented by the elastic ring (5), the joint (1) cannot be rotated in the direction to loosen the tightening. Thus, the joint (1) is connected to the cylindrical main body (2) in a state of preventing relative rotation.
[0031]
In this connection state, the O-ring (23) is connected to the O-ring (20) from the male screw portion (20) so as to press the O-ring (23) in an airtight manner against the inner peripheral surface on the inner side of the annular groove (12) of the joint (1). The distance to 23) and the width of the annular groove (12) are set in a predetermined dimensional relationship.
[0032]
When it is desired to separate the joint (1) and the cylindrical main body (2) in this connection state, the tool (16) of the joint (1) is connected to the joint (1) in the same manner as in the disassembly method of the first embodiment. The tool is forcibly rotated correspondingly and the insertion tool is inserted through the through hole (14) provided so as to penetrate the inner groove (10), thereby forcing the elastic ring (5). The joint (1) may be rotated in a direction in which the joint (1) is loosened while being elastically deformed in the diameter reducing direction and being pushed into the second outer groove (22).
[0033]
The joint (1) and the cylindrical main body (2) employed in the first and second embodiments have the same structure, but depending on the connection method, the joint (1) and the cylindrical main body (2) can be rotated relative to the cylindrical main body (2). And the fixed joint (1) can be connected. Therefore, the worker can select the connection between the joint (1) and the tubular main body (2) so as to be relatively rotatable or connected in a fixed state at the site, and perform the connection work. Therefore, the joint (1) and the tubular main body (2) are detachably connected to each other. In addition, if foreign matter or poor airtightness is detected after the connection, the joint (1) and the cylindrical body (2) are removed. There is no waste because you can reconnect.
[0034]
Further, in each of the above embodiments, the elastic ring (5) is elastically deformed in the diameter decreasing direction, but may be elastically deformed in the diameter increasing direction. In that case, the depth of the inner groove (10) is set so deep as to substantially match the cross-sectional diameter of the elastic ring (5), and the depth of the first outer groove (21) or the second outer groove (22) is set. The joint (1) and the cylindrical main body (2) are connected while the elastic ring (5) is set to be shallow, about the radius of the cross section of the elastic ring (5), and the elastic ring (5) is housed in the inner groove (10). It is good also as composition.
[0035]
However, as in the case of the first embodiment, when the connection is completed, the elastic ring (5) is connected to the first outer groove (21) and the inner groove (10) on the base end side of the cylindrical main body (2). The elastic ring (5) is elastically deformed in the radially reduced direction as in the case of the first embodiment, and the first outer groove (5) is formed in advance. It is desirable to adopt the configuration accommodated in 21).
[0036]
FIG. 3 shows a joint connection structure according to the third embodiment. The tubular main body (2) in this embodiment is equivalent to the gas inflow tubular portion (3a) of the conventional gas stopper (G) shown in FIG. 4, and the joint (1) connected thereto is A flexible pipe joint for connecting the flexible pipe (41) is provided.
The structure of the cylindrical main body (2) is the same as that of the cylindrical main body (2) as the gas inflow cylindrical section (3a) in the first and second embodiments described above. A pair of first and second outer grooves (21) and (22) and a male screw portion (20) are formed in this order from the side.
[0037]
In particular, in this embodiment, in order to connect the joint to the cylindrical main body (2) in a state of preventing relative rotation, the elastic ring (5) is used similarly to the second embodiment described above. ) Is fitted in the second outer groove (22), and a spacer (50) is provided at the base end of the cylindrical main body (2).
[0038]
The joint (1) for connecting a flexible tube has an annular groove (54) that can be externally connected to the tubular main body (2) at one end, and the distal end of the flexible tube (41) is inserted together with the sealing material (55). Is formed so as to open toward the other end, a tightening tube (52) screwed to the other end of the joint body (51), and the tightening tube (52). And a retainer (53) for pressing the flexible tube (41) inserted into the annular groove (54) in a retaining state in accordance with the screwing of the joint body (51), and the one end of the joint body (51). Inner groove (10), female screw part (11), annular concave groove are arranged in this order from the one end side, similarly to the joint (1) of the first and second embodiments described above. (12) is formed. A plurality of through-holes (14) are formed so as to communicate with the inner groove (10), and the through-hole (14) is filled with a breathable waterproof member (15) during normal use. I have.
[0039]
In this embodiment, first, only the joint main body (51) is externally connected to the cylindrical main body (2) as the gas inflow cylindrical portion (3a) of the gas stopper (G). The connection procedure is the same as that of the second embodiment, and the female thread (11) is connected to the male thread (11) until the one end surface of the joint body (51) comes into contact with the spacer (50). 20), the joint body (51) is fixed to the tubular main body (2) in a state where it is prevented from coming off and in a state where relative rotation is prevented by the action of the elastic ring (5). 2).
[0040]
Thereafter, a flexible tube (41) having a retainer (53) and a tightening cylinder (52) previously attached to the distal end portion is inserted from the other end of the joint body (51), and the flexible tube (41) is inserted into the flexible tube (41). Inserting into the annular groove (54) and tightening the tightening cylinder (52) to the joint main body (51) until it reaches the final tightening position, the flexible pipe is inserted into the gas inlet cylinder (3a) of the gas plug (G). The joint (1) is connected, and the flexible pipe (41) is connected via the flexible pipe joint (1).
[0041]
The joint body (51) is rotated by forcibly turning the joint body (51) in a direction to loosen the screw while inserting a tool through the through hole (14) to elastically deform the elastic ring (5). It can be removed from the gas tap (G).
[0042]
In this embodiment, the joint body (51) is connected to the gas inflow cylinder (3a) in a state of preventing relative rotation. However, when the joint body (51) is rotatably connected, the spacer (50) is provided. It may be removed and tightened until the annular concave groove (12) of the joint body (51) corresponds to the male screw part (20) of the cylindrical main body (2) as the gas inflow cylindrical part (3a) (first). Tightening completed state).
[Brief description of the drawings]
FIG. 1 is a sectional view showing a connection structure of a joint according to a first embodiment of the present invention.
FIG. 2 is a sectional view showing a connection structure of a joint according to a second embodiment of the present invention.
FIG. 3 is a sectional view showing a connection structure of a joint according to a third embodiment of the present invention.
FIG. 4 is a sectional view showing a connection mode of a joint to a conventional gas stopper.
[Explanation of symbols]
(1) ... Joint
(11) ・ ・ ・ ・ ・ ・ Male thread
(12) ・ ・ ・ ・ ・ ・ Circular groove
(2) ... tubular body
(20) ・ ・ ・ Male thread

Claims (4)

ガス栓のガス流路の上流端又は下流端を構成している筒状主体に外嵌接続させる継手の接続構造において、
前記筒状主体の外周面に雄ネジ部が形成され、
前記継手の一端近傍の内周面に、前記雄ネジ部に螺合可能な雌ネジ部が形成されると共にその奥側に連続するように環状凹溝が周方向に沿って形成され、
前記環状凹溝の幅は、前記雄ネジ部の形成範囲の軸方向の長さよりも幅広に設定されており、
前記雄ネジ部が前記環状凹溝に対応したときが第1の締付け完了状態とすると共に、前記雄ネジ部が前記雌ネジ部に螺合状態にあるときが第2の締付け完了状態とし、
前記第1及び第2両締め付け完了状態の各々にて、前記継手は前記筒状主体に外周気密状態に且つ抜け止め状態に接続されるように設定されており、
前記継手を前記筒状主体に対して抜け止め状態に固定する抜け止め手段は、工具によって解除可能に設定されていることを特徴とする継手の接続構造。
In a connection structure of a joint that is externally connected to a cylindrical main body constituting an upstream end or a downstream end of a gas passage of a gas stopper,
A male screw portion is formed on the outer peripheral surface of the cylindrical main body,
On the inner peripheral surface near one end of the joint, a female screw portion capable of being screwed to the male screw portion is formed, and an annular groove is formed along the circumferential direction so as to be continuous with the inner side thereof,
The width of the annular groove is set to be wider than the axial length of the forming range of the male screw portion,
When the male screw portion corresponds to the annular groove, the first tightening is completed, and when the male screw portion is screwed to the female screw portion, the second tightening is completed,
In each of the first and second tightening completed states, the joint is set to be connected to the cylindrical main body in an outer peripheral airtight state and a retaining state,
The joint connecting structure, wherein a retaining means for fixing the coupling in a retaining state with respect to the cylindrical main body is set so as to be releasable by a tool.
請求項1に記載の継手の接続構造において、前記抜け止め手段は、半径方向に縮径又は拡径可能な弾性リングと、前記筒状主体の胴部外周面の基端部近傍の所定位置とそれよりも一定の間隔をおいた開放端側の所定位置とにそれぞれ周方向に沿って形成された一対の第1、第2外溝と、前記継手の胴部内周面の所定位置に周方向に沿って形成された内溝とからなり、
前記第1、第2外溝、又は、内溝のどちらか一方は、前記弾性リングを弾性変形させた状態にて全体を収容可能な深さを有すると共に、どちらか他方は、弾性復帰した状態の前記弾性リングの外周部分又は内周部分が浅く嵌り込む深さに設定されており、
前記第1の締付け完了状態にあるとき、前記内溝は前記第1外溝に対応し、前記第2の締付け完了状態にあるとき、前記内溝は前記第2外溝に対応するように設定されていると共に、その対応部に前記弾性リングが配設される構成とした継手の接続構造。
2. The joint connection structure according to claim 1, wherein the retaining means comprises: an elastic ring capable of radially contracting or expanding in diameter; and a predetermined position near a base end of an outer peripheral surface of the body of the tubular main body. A pair of first and second outer grooves formed along the circumferential direction at predetermined positions on the open end side with a certain distance therebetween, and a circumferential direction at a predetermined position on the inner peripheral surface of the body of the joint; Consisting of an inner groove formed along
Either the first or second outer groove or the inner groove has a depth capable of accommodating the whole in a state where the elastic ring is elastically deformed, and the other one is in an elastically restored state. The outer peripheral portion or the inner peripheral portion of the elastic ring is set to a depth at which it is fitted shallowly,
The inner groove corresponds to the first outer groove when the first tightening is completed, and the inner groove corresponds to the second outer groove when the second tightening is completed. And a joint connection structure in which the elastic ring is disposed at a corresponding portion thereof.
請求項2に記載の継手の接続構造において、前記弾性リングは縮径方向に弾性変形可能とし、前記継手には、その胴部を半径方向に貫通し且つ前記内溝内に連通する貫通孔が複数箇所に形成されており、通常の使用時においては、前記貫通孔には通気性防水部材が充填されている継手の接続構造。The joint connecting structure according to claim 2, wherein the elastic ring is elastically deformable in a radially-reduced direction, and the joint has a through-hole that penetrates its body in a radial direction and communicates with the inner groove. A connection structure for a joint formed at a plurality of locations, wherein the through-hole is filled with a breathable waterproof member during normal use. 請求項1から3のいずれかに記載の継手の接続構造において、前記筒状主体の基端部には筒体が外嵌されており、
前記継手の前記一端が前記筒体に当接するとき、前記継手は前記第2の締付け完了状態となるように設定されている継手の接続構造。
The joint connection structure according to any one of claims 1 to 3, wherein a tubular body is externally fitted to a base end of the tubular main body,
The joint connection structure, wherein the joint is set to be in the second tightening completed state when the one end of the joint abuts on the cylindrical body.
JP2003122074A 2003-04-25 2003-04-25 Joint connection structure Expired - Fee Related JP3712712B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006002924A (en) * 2004-06-21 2006-01-05 Fujii Gokin Seisakusho Co Ltd Plug cap
JP2013257005A (en) * 2012-06-13 2013-12-26 Fujitsu Ltd Coupler, socket and plug
CN107250636A (en) * 2015-02-26 2017-10-13 本田技研工业株式会社 The installation constitution of magnetic valve

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006002924A (en) * 2004-06-21 2006-01-05 Fujii Gokin Seisakusho Co Ltd Plug cap
JP4542834B2 (en) * 2004-06-21 2010-09-15 株式会社藤井合金製作所 Plug cap
JP2013257005A (en) * 2012-06-13 2013-12-26 Fujitsu Ltd Coupler, socket and plug
CN107250636A (en) * 2015-02-26 2017-10-13 本田技研工业株式会社 The installation constitution of magnetic valve
CN107250636B (en) * 2015-02-26 2019-05-03 本田技研工业株式会社 The mounting structure of solenoid valve

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