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JP3988191B2 - Quick connector with half-mating prevention function - Google Patents
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JP3988191B2 - Quick connector with half-mating prevention function - Google Patents

Quick connector with half-mating prevention function Download PDF

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Publication number
JP3988191B2
JP3988191B2 JP2002382638A JP2002382638A JP3988191B2 JP 3988191 B2 JP3988191 B2 JP 3988191B2 JP 2002382638 A JP2002382638 A JP 2002382638A JP 2002382638 A JP2002382638 A JP 2002382638A JP 3988191 B2 JP3988191 B2 JP 3988191B2
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JP
Japan
Prior art keywords
axial direction
connection confirmation
connector housing
axial
pipe body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2002382638A
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Japanese (ja)
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JP2004211814A (en
Inventor
知己 井上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Riko Co Ltd
Original Assignee
Tokai Rubber Industries Ltd
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Filing date
Publication date
Application filed by Tokai Rubber Industries Ltd filed Critical Tokai Rubber Industries Ltd
Priority to JP2002382638A priority Critical patent/JP3988191B2/en
Publication of JP2004211814A publication Critical patent/JP2004211814A/en
Application granted granted Critical
Publication of JP3988191B2 publication Critical patent/JP3988191B2/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00Couplings of the quick-acting type
    • F16L37/08Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/098Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of flexible hooks
    • F16L37/0985Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of flexible hooks the flexible hook extending radially inwardly from an outer part and engaging a bead, recess or the like on an inner part
    • F16L37/0987Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of flexible hooks the flexible hook extending radially inwardly from an outer part and engaging a bead, recess or the like on an inner part the flexible hook being progressively compressed by axial tensile loads acting on the coupling
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L2201/00Special arrangements for pipe couplings
    • F16L2201/10Indicators for correct coupling

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、パイプ体がクイックコネクタに正常にスナップ係合していることを確認できる半嵌合防止機能を備えたクイックコネクタに関する。
【0002】
【従来の技術】
自動車用ガソリン燃料配管などの流体配管の連結に用いられるコネクタとパイプ体との接続は、パイプ体の挿入側外周面に環状係合突部を形成して挿入端部を構成しておき、この環状係合突部がコネクタに設けられたリテーナー手段とスナップ係合するように、パイプ体の挿入端部をコネクタに挿入嵌合してパイプ体とコネクタとを抜け止め状態とすることにより行われる。このように使用されるコネクタあるいはクイックコネクタは、軸方向一方側にチューブ接続部が形成され、軸方向他方側にリテーナー保持部を有する筒状のコネクタハウジングと、このコネクタハウジングのリテーナー保持部に保持されたリテーナー手段と、から構成され、リテーナー手段は、例えば接続係合部を構成する係合スリット又は係合突出爪を有して環状体又はほぼ環状体に形成されていて、パイプ体は、係合スリット又は係合突出爪に環状係合突部がスナップ係合するように、挿入端部が軸方向他方側端開口からコネクタハウジング内に相対的に挿入されて、嵌合接続されることとなる。
【0003】
パイプ体の環状係合突部は、リテーナー手段を変形させながら相対的に軸方向一方側に進行して係合スリット又は係合突出爪と係合することとなるので、十分に注意して接続作業を行わないと、コネクタハウジングのリテーナー保持部内にパイプ体の挿入端部が十分挿入されていないといった事態、すなわち環状係合突部がリテーナー手段の係合スリット又は係合突出爪と係合していない、いわゆる半嵌合状態が生じてしまう可能性がある。クイックコネクタとパイプ体とが半嵌合状態のまま配管接続構造が使用されれば、通常は、クイックコネクタとパイプ体との間のシール手段による密封が不十分となって、内部流体が漏出してしまうこととなる。
【0004】
そこで、クイックコネクタに、パイプ体の嵌合状態を確認するための接続確認手段を構成しておくことが必要となるが、このような接続確認手段としては、コネクタハウジングに取り付けられたチェッカーをコネクタから取り外そうとすると、チェッカーに設けられている検知片がリテーナー手段の係合突出爪あるいは係合突出爪の軸方向一方側端近傍に達するまでコネクタハウジング内に入り込むといった構成のものが知られている(例えば特許文献1参照)。この接続確認構造では、パイプ体が半嵌合状態であり、パイプ体の環状係合突部が係合突出爪の軸方向一方側端よりも軸方向他方側に位置しているときは、検知片が環状係合突部に当接してチェッカーをコネクタハウジングから取り外すことができないので、このことにより、パイプ体が半嵌合状態であることを確認することができ、また、パイプ体の環状係合突部が係合突出爪の軸方向一方側端と係合している場合には、チェッカーをコネクタハウジングから取り外すことができるので、このことにより、パイプ体が正常に接続されたことを確認できる。
【0005】
【特許文献1】
特開平11−13959号公報(第4頁、図4)
【0006】
【発明が解決しようとする課題】
しかしながら、チェッカーの取り外しは、チェッカーを接続筒部側に移動させてから、係合部を引き起こすようにして行われるので、接続確認作業が煩雑となる。しかも、コネクタハウジングから取り外した後で、チェッカーを誤って落下させてしまうことも多く、チェッカーを拾い上げるのに手間がかかる。また、チェッカーが拾い上げることのできない個所に落下することも稀ではない。
【0007】
そこで本発明は、接続確認操作が容易であり、しかも、コネクタハウジングから取り外す必要のない接続確認手段を備えたクイックコネクタの提供を目的とする。
【0008】
【課題を解決するための手段】
この目的を達成するための本発明のクイックコネクタは、軸方向一方側にチューブ接続部が形成されたコネクタハウジングと、このコネクタハウジングの軸方向他方側に設けられた又は取り付けられたリテーナー手段(又はリテーナー)と、軸方向他方側端開口から前記コネクタハウジング内に挿入された(相対的に挿入された)パイプ体の環状係合突部が、周方向所定位置に非係合個所を有して前記リテーナー手段に形成された接続係合部とスナップ係合したことを確認するための接続確認手段と、を具備している半嵌合防止機能を有するクイックコネクタであって、前記接続確認手段は、前記コネクタハウジングの外周に設けられた軸方向に延びるガイドと、前記ガイドに沿って、軸方向一方側の確認位置と軸方向他方側の退避位置との間を軸方向に移動可能な操作本体と、前記操作本体に設けられ、前記操作本体の軸方向への移動にともない前記コネクタハウジングの内周面に沿って軸方向に移動する接続確認部と、を備え、前記操作本体は、前記確認位置に移動したときに、前記コネクタハウジングに形成されている、例えば前記ガイドに形成されている係止部と軸方向に係合する係合部を有していて、前記接続確認部は、前記操作本体が前記退避位置に移動すると、前記パイプ体の前記コネクタハウジング内への挿入を許容するように軸方向他方側に移動し、前記接続確認部の軸方向一方側端は、前記操作本体が前記確認位置に移動したときに、前記リテーナー手段の前記非係合個所で前記接続係合部とほぼ等しい軸方向位置まで達している、という基本的構成を採用する。接続確認部の軸方向一方側端は、操作本体が確認位置に移動したときに、又は、操作本体が確認位置に移動するときに、例えば、コネクタハウジング又はコネクタハウジングの軸方向他方側の軸線から、半径が、パイプ体の環状係合突部の外径の半分以内又は半分未満である径方向範囲に達する。チューブ接続部に接続されるチューブは、パイプ体の種々の相手側部材を広く含むものである。また、操作本体は、操作対象及び操作され得る部分を広く含むものである。操作本体と接続確認部とは、例えば、コネクタハウジングの軸方向他方側の周壁を挟み付けるように、又は挟むように配置される。
【0009】
操作本体をガイドに沿って退避位置まで軸方向他方側に移動させると、接続確認部は、パイプ体のコネクタハウジング内への挿入を許容するように軸方向他方側に移動する。そこで、操作本体を退避位置に保持した状態で、パイプ体を軸方向他方側端開口からコネクタハウジング内に挿入する。パイプ体をコネクタハウジング内に挿入してから、操作本体をガイドに沿って軸方向一方側に移動させる。ここで、パイプ体の挿入が不完全でパイプ体がクイックコネクタに対して半嵌合状態となっているときには、パイプ体の環状係合突部はリテーナー手段の接続係合部よりも軸方向他方側に位置している。したがって、操作本体が確認位置に到達する前に、接続確認部の軸方向一方側端がパイプ体の環状係合突部と当接する。接続確認部の軸方向一方側端がパイプ体の環状係合突部と当接すると、操作本体をそれ以上軸方向一方側に移動させることができないように構成しておけば、操作本体の係合部をコネクタハウジングの係止部と係合させることができないので、パイプ体が半嵌合状態であることが確認できる。係合部は係止部とスナップ係合するように構成されるのが普通である。逆に、パイプ体が完全にコネクタハウジング内に挿入され、パイプ体の環状係合突部がリテーナー手段の接続係合部と係合しているときには、操作本体が確認位置に到達するまで、接続確認部の軸方向一方側への進行は阻止されないので、操作本体の係合部をコネクタハウジングの係止部と係合させることができ、パイプ体が正常にクイックコネクタに接続されたことを確認できる。接続確認部は、例えば、操作本体に、コネクタハウジングの軸方向他方側端よりも軸方向他方側を通る折り返し部を形成し、この折り返し部の先端から軸方向一方側に延びるようにして形成することができる。本発明では、接続確認部はまた、リテーナー手段の接続係合部に係合したパイプ体の環状係合突部が、接続係合部から外れてしまうことを防止する、パイプ体に対する抜け止め機能を有する。ここでは、リテーナー手段と接続確認手段とによるパイプ体へのダブルロック構造が構成されることとなる。
【0010】
ところで、パイプ体がクイックコネクタに対して半嵌合状態となっていて、接続確認部の軸方向一方側端がパイプ体の環状係合突部と当接したときに、操作本体を軸方向一方側に強く押せば、接続確認部がパイプ体の環状係合突部を軸方向一方側に押して移動させ、リテーナー手段の接続係合部にスナップ係合させるといったように構成しておけば、本発明の接続確認手段は、パイプ体が半嵌合状態のときに、パイプ体を押して正常に接続させる挿入補助機能を有することとなる。このように構成することにより、パイプ体が半嵌合状態のときに、パイプ体をコネクタハウジングに深く挿入しなおし、再び操作本体を確認位置まで移動させるといった面倒な作業手順を経る必要がなくなる。接続確認部の軸方向一方側端は、リテーナー手段の接続係合部の非係合個所に位置しているので、接続確認部はパイプ体の環状係合突部がリテーナー手段の接続係合部と係合することに対する妨げとはならない。
【0011】
操作本体が退避位置に移動すると、接続確認部は、パイプ体のコネクタハウジング内への挿入を許容する状態となる必要がある。すなわち、接続確認部は、パイプ体の環状係合突部の相対的移動経路の径方向外側に位置している必要がある。また、接続確認部は、操作本体の軸方向一方側への移動にともなって軸方向一方側に移動したときに、少なくとも軸方向一方側端が、パイプ体の環状係合突部の相対的移動経路内に位置するようになる必要がある。そこで、例えば、コネクタハウジングの軸方向他方側の内周面に、接続確認部の案内面を形成し、この案内面を、接続確認部が軸方向一方側に移動したときに、接続確認部の軸方向一方側端又は軸方向一方側端部を径方向内側に案内し、接続確認部が軸方向他方側に移動したときに、接続確認部の軸方向一方側端又は軸方向一方側端部を径方向外側に案内するように(位置させるように)構成しておく。そして、接続確認部の軸方向一方側端は、案内面によって径方向内側に案内されながら、リテーナー手段の接続係合部とほぼ等しい軸方向位置まで達し、接続確認部は、軸方向一方側端又は軸方向一方側端部が案内面によって径方向外側に案内されて(位置して)、パイプ体のコネクタハウジング内への挿入を許容する、といったようにしておく。接続確認部の軸方向一方側端部は、径方向外側に位置しているときには、案内面に接触している必要は必ずしもない。接続確認部は、例えば、軸方向一方側端部よりも、径方向内側に位置する部分がないように形成され、接続確認部の軸方向一方側端又は軸方向一方側端部が、軸方向他方側に移動すると、案内面によってパイプ体の環状係合突部の相対的移動経路の径方向外側に案内されるといったように構成される。
【0012】
より具体的には、案内面を、軸方向一方側に向って徐々に径方向内側に傾斜あるいは湾曲する押出し面部を軸方向一方側に備え、軸方向他方側に退避面部を有するものとして形成し、接続確認部の軸方向一方側端又は軸方向一方側端部が、押出し面部によって径方向内側に案内され、退避面部によって径方向外側に案内される(位置する)ように構成する。すなわち、接続確認部の軸方向一方側端又は軸方向一方側端部が、退避面部に位置しているときには、パイプ体のコネクタハウジング内への挿入を許容するように径方向外側に退避し、押出し面部に案内されながら軸方向一方側に移動すると、パイプ体の環状係合突部と当接するような径方向内側位置に移動するといったように構成する。
【0013】
本発明では、リテーナー手段を、周方向両端部間に変形用隙間が形成された断面C形に形成して、コネクタハウジングの軸方向他方側内に嵌め付け、接続確認部を、リテーナー手段の変形用隙間に位置させて(リテーナー手段の変形用隙間と対応するように位置させて)軸方向に移動させる、といったように構成することができる。例えば、案内面はリテーナー手段の変形用隙間に位置して(リテーナー手段の変形用隙間と対応するように位置して)形成される。
【0014】
【発明の実施の形態】
以下、本発明の実施の形態を図面を参照して説明する。
【0015】
図1は本発明に係るクイックコネクタの斜視図、図2はクイックコネクタの断面図、図3はリテーナーの斜視図である。
【0016】
自動車のガソリン燃料配管の連結に用いられるクイックコネクタ1は、ガラス繊維強化ポリアミド(PA・GF)製の筒状のコネクタハウジング3を有し、このコネクタハウジング3は、パイプ挿入部5と、このパイプ挿入部5の軸方向一方側端部に、このパイプ挿入部5に対して屈曲(ここでは直角に屈曲)して、あるいはパイプ挿入部5と角度を有して(ここでは90度の角度を有して、あるいは直交して)一体的に接続形成されたチューブ接続部7と、を備えて構成されていて、コネクタハウジング3には、パイプ挿入部5の軸方向他方側端(後端)からチューブ接続部7の軸方向(チューブ接続部7の軸方向)一方側端(先端)まで貫通する貫通孔9が形成されている。チューブ接続部7の外周には樹脂製のチューブがきつく嵌め付けられて接続される。パイプ挿入部5は、チューブ接続部7が一体的に接続形成された軸方向一方側の円筒状連絡部11と、外周面の径方向対称位置に平面状部分13、13が形成され、周壁のそれぞれの円弧状部分15、15に係合窓17、17が対向して設けられた軸方向他方側の大径のリテーナー保持部19と、カラー21を介して軸方向に並んで内周面に嵌め込まれた一対のOリング23、23を有し、軸方向他方側から内周面に樹脂製ブッシュ25が嵌め込まれている(樹脂製ブッシュ25はリテーナー保持部19の軸方向一方側とにまたがって嵌め込まれている)、軸方向中間の円筒状シール部27と、から構成され、円筒状シール部27はリテーナー保持部19よりも小径で、円筒状連絡部11よりも大径に構成されている。
【0017】
リテーナー保持部19の一方の平面状部分13には接続確認手段29が構成されていて、この接続確認手段29は、一方の平面状部分13に形成されたガイド31と、このガイド31に嵌め付けられた接続確認具33と、を備えている(図1では接続確認手段29が分解されて示されている)。
【0018】
リテーナー保持部19内にはPA製のリテーナー35(リテーナー手段)が嵌め付けられていて、このリテーナー35は、比較的柔軟であり、弾性変形可能なように構成されている。リテーナー35は、軸方向他方側端部の径方向対称位置に、径方向外側に突出した一対の係合爪部37、37が形成されている、周方向両端部39、39(非係合個所)間に比較的大きな変形用隙間が設けられた断面C形又はC形状の本体部41を有し、この本体部41の内面は、周方向両端部39、39及び変形用隙間と対向する部分を除いて軸方向一方側に向かって縮径する状態に形成されていて、本体部41の軸方向一方側端部43は、周方向両端部39、39及び変形用隙間と対向する部分を除いてパイプ体45(図4参照)とほぼ同じ内径状態に形成され、環状係合突部47(図4参照)よりも小さい内径状態に形成されている。
【0019】
リテーナー35の本体部41の軸方向他方側端部には、係合爪部37、37と対応した位置から軸方向他方側に向かって径方向外側に傾斜して延びる一対の操作アーム49、49が一体的に設けられていて、それぞれの操作アーム49、49の軸方向他方側端部には径方向外側に突出した操作端部51、51が形成されている。本体部41の軸方向一方側端部43には、周方向に延びる係合スリット53、53(接続係合部)が対向して形成されていて、このような構成のリテーナー35は、係合爪部37がリテーナー保持部19の係合窓17内に入り込み、操作端部51が、リテーナー保持部19の軸方向他方側端と係合状態となるように、かつ、周方向両端部39、39間の変形用隙間が、接続確認手段29が構成されている一方の平面状部分13と対応するように、リテーナー保持部19内に押し込まれて嵌め付けられている。
【0020】
図4はクイックコネクタ1にパイプ体を挿入接続した状態を示す断面図である。
【0021】
クイックコネクタ1にリテーナー保持部19の軸方向他方側端開口55から挿入されて嵌め付けられたパイプ体45は例えば金属製であり、挿入端部57の外周面に環状係合突部47を有していて、この環状係合突部47がリテーナー35の本体部41を押し広げて進行し、係合スリット53に嵌り込んでスナップ係合するまで挿入端部57がコネクタハウジング3のパイプ挿入部5内に押し込まれている。パイプ体45の挿入端部57とコネクタハウジング3との間は、一対のOリング23、23によって密封されている。
【0022】
パイプ体45は、接続確認具33を軸方向他方側の退避位置まで移動させ、そしてリテーナー35の操作アーム49、49の操作端部51、51を外側から押圧して操作アーム49、49の径方向の間隔、したがって係合爪部37、37の径方向の間隔を狭め、係合爪部37が係合窓17から抜け出た状態としてリテーナー35をコネクタハウジング3から相対的に引き出すと、このリテーナー35とともにコネクタハウジング3から引き抜かれる。
【0023】
図5は接続確認手段29の詳細を示すための分解斜視図、図6は接続確認具33の底面図である。
【0024】
ガイド31は、一方の平面状部分13に一体的に突出形成されたガイド本体59と、このガイド本体59の突出側端部の幅方向両側に、全長にわたって、一体的に側方へ突出形成された一対の押さえ部61、61と、を備えて断面略T字状に構成され、ガイド本体59の突出側端面と一対の押さえ部61、61の外側面とは、平坦なガイド面63を形成している。ガイド本体59は、平面状部分13よりも狭い幅を有して平面状部分13の軸方向全長にわたって延びるように、平面状部分13の幅方向中間に形成され、一対の押さえ部61、61は、平面状部分13の幅方向端と対応する位置まで側方に突出していて、平面状部分13の幅方向端部と押さえ部61との間にはそれぞれ、軸方向に延びるガイド溝65が形成されている。ガイド本体59の側面の軸方向一方側端部にはそれぞれ、ガイド溝65に位置して、三角形状の確認用凹部67(係止部)が形成され、ガイド本体59の側面の軸方向中央部にはそれぞれ、ガイド溝65に位置して、三角形状の退避用凹部69が形成されている。
【0025】
接続確認具33は、操作本体71と、この操作本体71の軸方向他方側端から軸方向他方側に延びて折り返す折り返し部73と、この折り返し部73の折り返し側軸方向一方側端又は先端(図5の一点鎖線参照)から軸方向一方側に延びる接続確認部75と、から一体的に形成されていて、操作本体71は、平面状部分13の軸方向全長にわたって軸方向に延びるガイド31に嵌め付けられてこのガイド31に沿って軸方向に移動できるように形成されている。操作本体71は、ガイド31のガイド面63に被さる本体部77と、それぞれの押さえ部61の側面に沿うように、この本体部77の幅方向両側に形成された側壁部79、79と、それぞれのガイド溝65内に嵌り込むように、側壁部79に内側へ突出して形成された抜け止め部81とから一体的に形成されているが、軸方向一方側では、側壁部79が抜け止め部81と接続されるようには形成されていないので、抜け止め部81の軸方向一方側は幅方向に広がりやすい変形部83を構成している。変形部83の軸方向一方側端部の内側には、確認用凹部67及び退避用凹部69に対応した三角形状の突出部85(係合部)が形成されている。本体部77の操作外面87は、軸方向中央が軸方向両側よりも多少窪むように湾曲して形成され、かつ、幅方向に延びる滑り止め用の溝を全長にわたって連続的に有している。
【0026】
接続確認部75の軸方向一方側端部分の外面(操作本体71側の面)は、軸方向一方側に向って径方向内側に傾斜するスライド面89として形成され、接続確認部75の軸方向一方側端部の内面には内側(操作本体71の反対側)に突出する突出個所91が形成されていて、接続確認部75の軸方向一方側端面の広さを十分なものとしている。
【0027】
図7はクイックコネクタ1にパイプ体45を挿入する場合を説明する図である。
【0028】
接続確認具33は、操作本体71がガイド31に沿って軸方向にスライド可能なように、かつ、接続確認部75がリテーナー保持部19内に入り込み、リテーナー保持部19の一方の平面状部分13個所の内面に沿って移動可能なように、コネクタハウジング3に取り付けられている。操作本体71と接続確認部75との間隔は、リテーナー保持部19の一方の平面状部分13個所の厚さとほぼ等しいように設定されている。パイプ体45をコネクタハウジング3内に挿入するときには、ガイド31に軸方向のスライドが可能なように取り付けられた接続確認具33の操作本体71を、軸方向他方側の退避位置に移動させる。退避位置では、操作本体71の変形部83の突出部85が、ガイド溝65の退避用凹部69内にスナップ的に嵌り込んでこの退避用凹部69と軸方向に係合しているので、接続確認具33は退避位置に保持される。接続確認部75の軸方向一方側端部は、リテーナー35の周方向両端部39、39間で、リテーナー保持部19の平面状部分13個所の内面に形成されている案内面93と接触するが、退避位置では、折り返し部73や接続確認部75を変形させることなく案内面93の軸方向他方側の退避面部95に軽く接触している。退避面部95は、パイプ体45の環状係合突部47よりも十分大径の、コネクタハウジング3又はリテーナー保持部19の軸方向他方側の円筒状内周面の一部であるので、接続確認部75の軸方向一方側端部は、パイプ体45の環状係合突部47の移動経路の径方向外側に位置している。したがって、操作本体71が退避位置に移動している場合には、パイプ体45の挿入作業に支障は生じない。なお、変形部83、83は、突出部85が、確認用凹部67及び退避用凹部69内に嵌り込んでいる場合以外は、突出部85のガイド本体59の側面への当接により若干開き変形している。また、接続確認部75及び案内面93の幅は、コネクタハウジング3の平面状部分13の幅及びリテーナー35の周方向両端部39、39間の変形用隙間の幅よりも多少小さい。
【0029】
図8はパイプ体45の接続状態を確認する場合を説明する図であり、パイプ体が正常に接続されている場合の説明図である。
【0030】
パイプ体45をコネクタハウジング3内に挿入したら、操作外面87を指で押して操作本体71を軸方向一方側に移動させる。ここでは、変形部83の突出部85が退避用凹部69から抜け出る必要があるため、多少大きい力で操作本体71を押すこととなる。接続確認部75は、操作本体71が確認位置に移動して、変形部83の突出部85が、ガイド溝65の確認用凹部67内にスナップ的に嵌り込み、この確認用凹部67と軸方向に係合したときに、軸方向一方側端が、リテーナー35の係合スリット53の軸方向他方側端付近に位置するように形成されているので、パイプ体45が正常にクイックコネクタ1に接続され、環状係合突部47が係合スリット53とスナップ係合している場合には、操作本体71が確認位置に移動する前に、接続確認部75の軸方向一方側端が環状係合突部47に当接して進行を阻害されるといったことはない。したがって、操作本体71を確認位置に移動させ、変形部83の突出部85と、ガイド溝65の確認用凹部67とを係合させることができる。突出部85と確認用凹部67との係合により、パイプ体45の正常接続を確認でき、また、操作本体71は確認位置に保持される。さらに、この状態では、接続確認部75の軸方向一方側端が環状係合突部47と接触する直前の位置まで達しているので、環状係合突部47がリテーナー35の係合スリット53を変形させて係合スリット53から抜け出てしまうといったことは、環状係合突部47と接続確認部75の軸方向一方側端との当接により防止される。
【0031】
しかしながら、図9に示すように、パイプ体45が半嵌合状態で、環状係合突部47が係合スリット53よりも軸方向他方側に位置しているときは、操作本体71が確認位置に移動する前に、接続確認部75の軸方向一方側端が環状係合突部47に当接する。すなわち、案内面93の軸方向一方側には、軸方向一方側に向って係方向内側に傾斜する押出し面部97が形成されていて、接続確認部75のスライド面89が押出し面部97に沿ってスライドし、接続確認部75の軸方向一方側端部が、接続確認部75及び折り返し部73を変形させて、環状係合突部47に向って係方向内側に傾きながら進行し、環状係合突部47に当接する。したがって、変形部83の突出部85と、ガイド溝65の確認用凹部67とを係合させることができないので、半嵌合状態を確認できる。押出し面部97を形成している突出状部99は、コネクタハウジング3の平面状部分13個所の内面に一体的に突出形成されているが、リテーナー35の周方向両端部39、39間に入り込んでリテーナー35の回り止めとしても機能している。
【0032】
なお、ここで、例えばリテーナー35の形状や弾性が適当に設定されていれば、操作本体71を比較的強く軸方向一方側に押すと、環状係合突部47が接続確認部75の軸方向一方側端に押されてリテーナー35の係合スリット53内にスナップ係合することとなる。
【0033】
【発明の効果】
以上説明したように、本発明のクイックコネクタでは、操作本体をガイドに沿って軸方向に移動させるだけで接続確認を行うことができ、接続確認作業が容易となる。しかも、接続確認手段又は操作本体及び接続確認部は、接続確認後もクイックコネクタに装着されたままであるから、落下等のおそれもない。さらに、本発明のクイックコネクタでは、コネクタハウジング側の変更点が、簡単な構成のガイドを追加するといった程度であるといった利点もある。
【図面の簡単な説明】
【図1】図1は本発明に係るクイックコネクタの斜視図である。
【図2】クイックコネクタの断面図である。
【図3】リテーナーの斜視図である。
【図4】クイックコネクタにパイプ体を挿入接続した状態を示す断面図である。
【図5】接続確認手段の詳細を示すための分解斜視図である。
【図6】接続確認具の底面図である。
【図7】クイックコネクタにパイプ体を挿入する場合を説明する図である。
【図8】パイプ体の接続状態を確認する場合を説明する図であり、パイプ体が正常に接続されている場合の説明図である。
【図9】パイプ体の接続状態を確認する場合を説明する図であり、パイプ体が半嵌合状態の場合の説明図である。
【符号の説明】
1 クイックコネクタ
3 コネクタハウジング
7 チューブ接続部
29 接続確認手段
31 ガイド
35 リテーナー(リテーナー手段)
45 パイプ体
47 環状係合突部
53 係合スリット(接続係合部)
55 軸方向他方側端開口
67 確認用凹部(係止部)
71 操作本体
75 接続確認部
85 突出部(係合部)
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a quick connector having a half-fitting prevention function capable of confirming that a pipe body is normally snap-engaged with the quick connector.
[0002]
[Prior art]
The connector used for connecting fluid piping such as gasoline fuel piping for automobiles and the pipe body are connected to each other by forming an annular engagement protrusion on the insertion side outer peripheral surface of the pipe body, This is done by inserting and fitting the insertion end of the pipe body into the connector so that the annular engagement protrusion snap-engages with the retainer means provided on the connector, thereby preventing the pipe body and the connector from coming off. . The connector or quick connector used in this way is held in a cylindrical connector housing having a tube connecting portion formed on one side in the axial direction and having a retainer holding portion on the other side in the axial direction, and the retainer holding portion of the connector housing. The retainer means is formed into an annular body or a substantially annular body having, for example, an engagement slit or an engagement projecting claw constituting a connection engagement portion, and the pipe body is The insertion end is relatively inserted into the connector housing from the opening on the other side end in the axial direction so that the annular engagement protrusion snap-engages with the engagement slit or the engagement protrusion claw, and is connected by fitting. It becomes.
[0003]
The ring-shaped engagement protrusion of the pipe body moves relative to one side in the axial direction while deforming the retainer means and engages with the engagement slit or the engagement protrusion claw. If the work is not performed, the insertion end of the pipe body is not sufficiently inserted into the retainer holding portion of the connector housing, that is, the annular engagement protrusion engages with the engagement slit or the engagement protrusion claw of the retainer means. There is a possibility that a so-called half-fitted state will occur. If the pipe connection structure is used with the quick connector and the pipe body in a semi-fitted state, the sealing by the sealing means between the quick connector and the pipe body is usually insufficient, and the internal fluid leaks. Will end up.
[0004]
Therefore, it is necessary to configure a connection confirmation means for confirming the fitting state of the pipe body in the quick connector. As such a connection confirmation means, a checker attached to the connector housing is connected to the connector. There is a known configuration in which the detection piece provided on the checker enters into the connector housing until it reaches the vicinity of one end in the axial direction of the engagement projection claw or the engagement projection claw of the retainer means. (For example, refer to Patent Document 1). In this connection confirmation structure, when the pipe body is in a half-fitted state, and the annular engagement protrusion of the pipe body is located on the other axial side than the one axial end of the engagement protrusion claw, detection is performed. This makes it possible to confirm that the pipe body is in a half-fitted state because the piece abuts on the annular engagement protrusion and the checker cannot be removed from the connector housing. The checker can be removed from the connector housing when the mating protrusion is engaged with one end in the axial direction of the engaging protrusion claw. This confirms that the pipe body has been properly connected. it can.
[0005]
[Patent Document 1]
JP 11-13959 A (page 4, FIG. 4)
[0006]
[Problems to be solved by the invention]
However, the removal of the checker is performed so as to cause the engaging portion after the checker is moved to the connection tube portion side, so that the connection confirmation work becomes complicated. In addition, the checker is often accidentally dropped after being removed from the connector housing, and it takes time and effort to pick up the checker. It is not uncommon for a checker to fall to a location that cannot be picked up.
[0007]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a quick connector including a connection confirmation means that is easy to perform a connection confirmation operation and does not need to be removed from the connector housing.
[0008]
[Means for Solving the Problems]
In order to achieve this object, the quick connector of the present invention includes a connector housing having a tube connecting portion formed on one side in the axial direction, and a retainer means (or attached to or attached to the other side in the axial direction of the connector housing). Retainer) and an annular engagement protrusion of the pipe body inserted (relatively inserted) into the connector housing from the other axial end opening has a non-engaging portion at a predetermined position in the circumferential direction. A quick connector having a semi-fitting prevention function, comprising: a connection confirmation means for confirming that it is snap-engaged with a connection engagement portion formed in the retainer means, wherein the connection confirmation means A guide provided on the outer periphery of the connector housing extending in the axial direction, and a position between the check position on one axial side and the retracted position on the other axial side along the guide. An operation body that is movable in the axial direction; and a connection confirmation portion that is provided in the operation body and moves in the axial direction along the inner peripheral surface of the connector housing as the operation body moves in the axial direction. The operation main body has an engagement portion that is formed in the connector housing, for example, the engagement portion formed in the guide and engages in the axial direction when moved to the confirmation position. When the operation main body moves to the retracted position, the connection confirmation unit moves to the other side in the axial direction so as to allow the pipe body to be inserted into the connector housing. The side end adopts a basic configuration in which, when the operation main body moves to the confirmation position, it reaches an axial position substantially equal to the connection engagement portion at the non-engagement portion of the retainer means. . One end in the axial direction of the connection confirmation portion is, for example, from the axis of the connector housing or the other axial side of the connector housing when the operation main body is moved to the confirmation position or when the operation main body is moved to the confirmation position. , Reaching a radial range in which the radius is within or less than half of the outer diameter of the annular engagement projection of the pipe body. The tube connected to the tube connecting portion widely includes various counterpart members of the pipe body. Further, the operation main body widely includes an operation target and a portion that can be operated. For example, the operation main body and the connection confirmation unit are disposed so as to sandwich or sandwich the peripheral wall on the other axial side of the connector housing.
[0009]
When the operation body is moved along the guide to the other side in the axial direction to the retracted position, the connection confirmation portion moves to the other side in the axial direction so as to allow the pipe body to be inserted into the connector housing. Therefore, the pipe body is inserted into the connector housing from the opening on the other side end in the axial direction with the operation body held in the retracted position. After the pipe body is inserted into the connector housing, the operation body is moved along the guide to one side in the axial direction. Here, when the insertion of the pipe body is incomplete and the pipe body is in a half-fitted state with respect to the quick connector, the annular engagement protrusion of the pipe body is the other in the axial direction than the connection engagement part of the retainer means. Located on the side. Therefore, before the operation main body reaches the confirmation position, one end in the axial direction of the connection confirmation portion comes into contact with the annular engagement protrusion of the pipe body. If the operation main body cannot be moved further to the one side in the axial direction when the one end in the axial direction of the connection confirmation portion comes into contact with the annular engagement protrusion of the pipe body, the engagement of the operation main body Since the joint portion cannot be engaged with the locking portion of the connector housing, it can be confirmed that the pipe body is in a half-fitted state. The engaging portion is usually configured to snap-engage with the locking portion. Conversely, when the pipe body is completely inserted into the connector housing and the annular engagement protrusion of the pipe body is engaged with the connection engagement part of the retainer means, the connection is made until the operation body reaches the confirmation position. Since the check part is not prevented from moving to one side in the axial direction, the engaging part of the operation body can be engaged with the locking part of the connector housing, and it is confirmed that the pipe body is normally connected to the quick connector. it can. The connection confirmation part is formed, for example, by forming a folded part passing through the other axial side of the operation housing from the other axial end of the connector housing and extending from the tip of the folded part to the one axial side. be able to. In the present invention, the connection confirmation part also prevents the annular engagement protrusion of the pipe body engaged with the connection engagement part of the retainer means from being detached from the connection engagement part. Have Here, a double lock structure to the pipe body is constituted by the retainer means and the connection confirmation means.
[0010]
By the way, when the pipe body is in a semi-fitted state with respect to the quick connector and the one end in the axial direction of the connection confirmation portion comes into contact with the annular engagement protrusion of the pipe body, If the connection confirmation part is configured so that the annular engagement protrusion of the pipe body is pushed and moved to one side in the axial direction and snap-engaged with the connection engagement part of the retainer means. The connection confirmation means of the invention has an insertion assisting function that pushes the pipe body and connects it normally when the pipe body is in a half-fitted state. With this configuration, when the pipe body is in the half-fitted state, it is not necessary to go through the troublesome work procedure of reinserting the pipe body deeply into the connector housing and moving the operation body to the confirmation position again. Since one end in the axial direction of the connection confirmation portion is located at a non-engagement portion of the connection engagement portion of the retainer means, the connection confirmation portion is configured such that the annular engagement protrusion of the pipe body is the connection engagement portion of the retainer means. Will not interfere with engagement.
[0011]
When the operation main body moves to the retracted position, the connection confirmation unit needs to be in a state of allowing insertion of the pipe body into the connector housing. That is, the connection confirmation part needs to be located on the radially outer side of the relative movement path of the annular engagement protrusion of the pipe body. Further, when the connection confirmation unit moves to one side in the axial direction along with the movement of the operation main body to one side in the axial direction, at least one end in the axial direction is a relative movement of the annular engagement protrusion of the pipe body. Must be located in the path. Therefore, for example, a guide surface of the connection confirmation part is formed on the inner peripheral surface on the other axial side of the connector housing, and when the connection confirmation part moves to the one side in the axial direction, the guide confirmation surface of the connection confirmation part is formed. When one end in the axial direction or one end in the axial direction is guided inward in the radial direction and the connection confirmation part moves to the other side in the axial direction, one end in the axial direction or one end in the axial direction of the connection confirmation part Is configured to be guided (positioned) radially outward. Then, the one end in the axial direction of the connection confirmation portion reaches the axial position substantially equal to the connection engagement portion of the retainer means while being guided radially inward by the guide surface, and the connection confirmation portion has one end in the axial direction. Alternatively, one end portion in the axial direction is guided (positioned) radially outward by the guide surface to allow the pipe body to be inserted into the connector housing. When the one end portion in the axial direction of the connection confirmation portion is located on the radially outer side, it is not always necessary to be in contact with the guide surface. For example, the connection confirmation portion is formed so that there is no portion located radially inward from the one end portion in the axial direction, and the one end portion in the axial direction or the one end portion in the axial direction of the connection confirmation portion is in the axial direction. When it moves to the other side, it is configured such that it is guided by the guide surface to the outside in the radial direction of the relative movement path of the annular engagement protrusion of the pipe body.
[0012]
More specifically, the guide surface is formed so as to have an extrusion surface portion that is gradually inclined or curved radially inward toward one side in the axial direction and has a retracting surface portion on the other side in the axial direction. The one end in the axial direction or the one end in the axial direction of the connection confirmation portion is guided radially inward by the pushing surface portion and guided (positioned) radially outward by the retracting surface portion. That is, when the axially one side end or the axially one side end of the connection confirmation part is located on the retracting surface part, it is retracted radially outward to allow insertion of the pipe body into the connector housing, When it moves to one side in the axial direction while being guided by the extrusion surface portion, it is configured to move to a radially inner position so as to contact the annular engagement protrusion of the pipe body.
[0013]
In the present invention, the retainer means is formed in a cross-section C shape in which a deformation gap is formed between both ends in the circumferential direction, and is fitted into the other side in the axial direction of the connector housing. It can be configured such that it is moved in the axial direction by being positioned in the gap for use (positioned so as to correspond to the gap for deformation of the retainer means). For example, the guide surface is formed in the deformation gap of the retainer means (positioned so as to correspond to the deformation gap of the retainer means).
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
1 is a perspective view of a quick connector according to the present invention, FIG. 2 is a sectional view of the quick connector, and FIG. 3 is a perspective view of a retainer.
[0016]
A quick connector 1 used for connecting a gasoline fuel pipe of an automobile has a cylindrical connector housing 3 made of glass fiber reinforced polyamide (PA.GF). The connector housing 3 includes a pipe insertion portion 5 and a pipe. One end of the insertion portion 5 in the axial direction is bent with respect to the pipe insertion portion 5 (bent at a right angle here) or has an angle with the pipe insertion portion 5 (here, an angle of 90 degrees). The connector housing 3 is formed integrally with the tube connecting portion 7 formed integrally therewith, and the connector housing 3 has the other end (rear end) in the axial direction of the pipe insertion portion 5. A through hole 9 is formed so as to penetrate from one end (tip) to the axial direction of the tube connecting portion 7 (the axial direction of the tube connecting portion 7). A resin tube is tightly fitted to the outer periphery of the tube connection portion 7 and connected. The pipe insertion portion 5 has a cylindrical connecting portion 11 on one side in the axial direction in which the tube connecting portion 7 is integrally connected, and planar portions 13 and 13 are formed at radially symmetric positions on the outer peripheral surface. A large-diameter retainer holding portion 19 on the other side in the axial direction provided with engagement windows 17, 17 facing the respective arc-shaped portions 15, 15, and an inner peripheral surface aligned in the axial direction via a collar 21. A pair of O-rings 23 and 23 are fitted, and a resin bush 25 is fitted from the other axial side to the inner peripheral surface (the resin bush 25 extends across one axial side of the retainer holding portion 19. A cylindrical seal portion 27 in the middle of the axial direction, and the cylindrical seal portion 27 is smaller in diameter than the retainer holding portion 19 and larger in diameter than the cylindrical connecting portion 11. Yes.
[0017]
One planar portion 13 of the retainer holding portion 19 is provided with a connection confirmation means 29, and this connection confirmation means 29 is fitted to the guide 31 formed on the one planar portion 13 and the guide 31. The connection confirmation tool 33 is provided (the connection confirmation means 29 is shown in an exploded manner in FIG. 1).
[0018]
A retainer 35 (retainer means) made of PA is fitted in the retainer holding portion 19, and the retainer 35 is configured to be relatively flexible and elastically deformable. The retainer 35 has a pair of engaging claw portions 37 and 37 projecting radially outward at a radially symmetrical position of the other axial end portion, and both circumferential end portions 39 and 39 (non-engaging portions). ) Having a C-shaped or C-shaped main body 41 having a relatively large deformation gap therebetween, and the inner surface of the main body 41 is opposite to the circumferential ends 39 and 39 and the deformation gap. Except for a portion facing the circumferential end portions 39 and 39 and the deformation gap. The pipe body 45 (see FIG. 4) is formed to have substantially the same inner diameter, and the inner diameter is smaller than the annular engagement protrusion 47 (see FIG. 4).
[0019]
A pair of operation arms 49, 49 extending from the position corresponding to the engaging claws 37, 37 toward the other side in the axial direction inclining radially outward from the end on the other side in the axial direction of the main body 41 of the retainer 35. Are integrally provided, and operation end portions 51 and 51 projecting radially outward are formed at the other axial end portions of the operation arms 49 and 49, respectively. Engagement slits 53 and 53 (connection engagement portions) extending in the circumferential direction are formed to face each other at one end 43 in the axial direction of the main body 41, and the retainer 35 having such a configuration is engaged. The claw portion 37 enters the engagement window 17 of the retainer holding portion 19, the operation end portion 51 is engaged with the other axial end of the retainer holding portion 19, and both circumferential end portions 39, The deformation gap between 39 is pushed into and fitted into the retainer holding portion 19 so as to correspond to one planar portion 13 in which the connection confirmation means 29 is configured.
[0020]
FIG. 4 is a cross-sectional view showing a state where the pipe body is inserted and connected to the quick connector 1.
[0021]
The pipe body 45 inserted and fitted into the quick connector 1 from the other axial end opening 55 of the retainer holding portion 19 is made of metal, for example, and has an annular engagement protrusion 47 on the outer peripheral surface of the insertion end portion 57. The annular engagement protrusion 47 pushes and spreads the main body 41 of the retainer 35, and the insertion end 57 is inserted into the engagement slit 53 and snap-engaged until the pipe insertion portion of the connector housing 3 is inserted. 5 is pushed in. A space between the insertion end 57 of the pipe body 45 and the connector housing 3 is sealed by a pair of O-rings 23 and 23.
[0022]
The pipe body 45 moves the connection confirmation tool 33 to the retreat position on the other side in the axial direction, and presses the operation end portions 51 and 51 of the operation arms 49 and 49 of the retainer 35 from the outside to thereby reduce the diameter of the operation arms 49 and 49. When the retainer 35 is relatively pulled out from the connector housing 3 in a state in which the distance in the direction, that is, the distance in the radial direction of the engagement claw portions 37, 37 is narrowed and the engagement claw portion 37 is pulled out from the engagement window 17, the retainer 35 together with the connector housing 3.
[0023]
FIG. 5 is an exploded perspective view showing details of the connection confirmation means 29, and FIG. 6 is a bottom view of the connection confirmation tool 33.
[0024]
The guide 31 is integrally formed so as to project sideways over the entire length on both sides in the width direction of the projecting side end portion of the guide body 59 and the guide body 59 integrally projecting on the one planar portion 13. And a pair of pressing portions 61, 61 having a substantially T-shaped cross section, and the protruding end surface of the guide body 59 and the outer surfaces of the pair of pressing portions 61, 61 form a flat guide surface 63. is doing. The guide body 59 is formed in the middle in the width direction of the planar portion 13 so as to have a narrower width than the planar portion 13 and to extend over the entire axial length of the planar portion 13, and the pair of pressing portions 61, 61 Further, guide grooves 65 that protrude laterally to a position corresponding to the width direction end of the planar portion 13 and extend in the axial direction are formed between the width direction end portion of the planar portion 13 and the pressing portion 61. Has been. Each of the side ends of the guide body 59 in the axial direction is formed with a triangular confirmation recess 67 (locking portion) located in the guide groove 65, and the axial center portion on the side surface of the guide body 59. Each is formed with a triangular recess 69 located in the guide groove 65.
[0025]
The connection confirmation tool 33 includes an operation main body 71, a folded portion 73 that extends from the other axial end of the operation main body 71 to the other axial end, and is turned back. The connection confirmation part 75 extending in the axial direction from the one-dot chain line in FIG. 5 is integrally formed, and the operation main body 71 is connected to the guide 31 extending in the axial direction over the entire axial length of the planar portion 13. It is formed so that it can be fitted and moved along the guide 31 in the axial direction. The operation main body 71 includes a main body 77 covering the guide surface 63 of the guide 31, side walls 79 and 79 formed on both sides in the width direction of the main body 77 along the side surfaces of the respective pressing portions 61, respectively. The side wall 79 is integrally formed with a retaining portion 81 that protrudes inwardly from the side wall 79 so as to be fitted into the guide groove 65, but on one side in the axial direction, the side wall 79 is retained. Since it is not formed so as to be connected to 81, one side in the axial direction of the retaining portion 81 constitutes a deformable portion 83 that easily spreads in the width direction. A triangular protrusion 85 (engagement portion) corresponding to the confirmation recess 67 and the retraction recess 69 is formed on the inner side of the one end portion in the axial direction of the deformation portion 83. The operation outer surface 87 of the main body 77 is formed so as to be curved so that the center in the axial direction is slightly depressed from both sides in the axial direction, and has a non-slip groove extending in the width direction continuously over the entire length.
[0026]
The outer surface (the surface on the operation main body 71 side) of one end portion in the axial direction of the connection confirmation unit 75 is formed as a slide surface 89 that is inclined radially inward toward the one side in the axial direction. A protruding portion 91 that protrudes inward (opposite to the operation main body 71) is formed on the inner surface of the one end portion, and the area of the one end surface in the axial direction of the connection confirmation portion 75 is sufficient.
[0027]
FIG. 7 is a view for explaining a case where the pipe body 45 is inserted into the quick connector 1.
[0028]
The connection confirmation tool 33 is configured so that the operation main body 71 can slide in the axial direction along the guide 31, and the connection confirmation part 75 enters the retainer holding part 19, and one planar portion 13 of the retainer holding part 19 is provided. It is attached to the connector housing 3 so as to be movable along the inner surface of the location. The interval between the operation main body 71 and the connection confirmation unit 75 is set to be approximately equal to the thickness of one of the 13 planar portions of the retainer holding unit 19. When the pipe body 45 is inserted into the connector housing 3, the operation main body 71 of the connection confirmation tool 33 attached to the guide 31 so as to be slidable in the axial direction is moved to the retracted position on the other side in the axial direction. In the retracted position, the protruding portion 85 of the deformable portion 83 of the operation body 71 snaps into the retracting recess 69 of the guide groove 65 and engages with the retracting recess 69 in the axial direction. The confirmation tool 33 is held at the retracted position. One end portion in the axial direction of the connection confirmation portion 75 is in contact with the guide surface 93 formed on the inner surface of 13 planar portions of the retainer holding portion 19 between the circumferential end portions 39 and 39 of the retainer 35. In the retracted position, the folded portion 73 and the connection confirmation portion 75 are lightly in contact with the retracted surface portion 95 on the other axial side of the guide surface 93 without being deformed. Since the retracting surface portion 95 is a part of the cylindrical inner peripheral surface on the other side in the axial direction of the connector housing 3 or the retainer holding portion 19 having a sufficiently larger diameter than the annular engaging protrusion 47 of the pipe body 45, the connection confirmation One end in the axial direction of the portion 75 is located on the radially outer side of the moving path of the annular engagement protrusion 47 of the pipe body 45. Therefore, when the operation main body 71 is moved to the retracted position, there is no problem in the pipe body 45 insertion work. The deformed portions 83 and 83 are slightly opened and deformed by the contact of the projecting portion 85 with the side surface of the guide main body 59 except when the projecting portion 85 is fitted in the confirmation recessed portion 67 and the retracting recessed portion 69. is doing. Further, the width of the connection confirmation portion 75 and the guide surface 93 is slightly smaller than the width of the planar portion 13 of the connector housing 3 and the width of the deformation gap between the circumferential end portions 39 and 39 of the retainer 35.
[0029]
FIG. 8 is a diagram illustrating a case where the connection state of the pipe body 45 is confirmed, and is an explanatory diagram when the pipe body is normally connected.
[0030]
When the pipe body 45 is inserted into the connector housing 3, the operation outer surface 87 is pushed with a finger to move the operation main body 71 to one side in the axial direction. Here, since the protruding portion 85 of the deforming portion 83 needs to come out of the retracting recess 69, the operation main body 71 is pushed with a somewhat large force. In the connection confirmation portion 75, the operation main body 71 moves to the confirmation position, and the projecting portion 85 of the deformation portion 83 snaps into the confirmation recess 67 of the guide groove 65. Since the one end in the axial direction is positioned near the other end in the axial direction of the engagement slit 53 of the retainer 35 when engaged, the pipe body 45 is normally connected to the quick connector 1. When the annular engagement protrusion 47 is snap-engaged with the engagement slit 53, the one end in the axial direction of the connection confirmation portion 75 is annularly engaged before the operation main body 71 moves to the confirmation position. There is no such thing as abutting against the protrusion 47 and preventing the progress. Therefore, the operation main body 71 can be moved to the confirmation position, and the projecting portion 85 of the deformable portion 83 and the confirmation concave portion 67 of the guide groove 65 can be engaged. The normal connection of the pipe body 45 can be confirmed by the engagement between the protrusion 85 and the confirmation recess 67, and the operation main body 71 is held at the confirmation position. Furthermore, in this state, since the one end in the axial direction of the connection confirmation portion 75 has reached a position just before contacting the annular engagement protrusion 47, the annular engagement protrusion 47 opens the engagement slit 53 of the retainer 35. Deformation and slipping out of the engagement slit 53 are prevented by contact between the annular engagement protrusion 47 and one end of the connection confirmation portion 75 in the axial direction.
[0031]
However, as shown in FIG. 9, when the pipe body 45 is in a half-fitted state and the annular engagement protrusion 47 is positioned on the other side in the axial direction from the engagement slit 53, the operation body 71 is in the confirmation position. Before the movement, the one end in the axial direction of the connection confirmation portion 75 contacts the annular engagement protrusion 47. That is, on one side in the axial direction of the guide surface 93, an extrusion surface portion 97 that is inclined inward in the engagement direction toward the one side in the axial direction is formed, and the slide surface 89 of the connection confirmation portion 75 extends along the extrusion surface portion 97. One end of the connection confirmation portion 75 in the axial direction slides, deforms the connection confirmation portion 75 and the turn-back portion 73, and advances toward the annular engagement protrusion 47 while inclining inward in the engagement direction. Abuts against the protrusion 47. Therefore, the projecting portion 85 of the deformable portion 83 and the confirmation concave portion 67 of the guide groove 65 cannot be engaged, so that the half-fitted state can be confirmed. The protruding portion 99 forming the pushing surface portion 97 is integrally formed on the inner surface of the 13 planar portions of the connector housing 3, but enters between the circumferential end portions 39, 39 of the retainer 35. It also functions as a detent for the retainer 35.
[0032]
Here, for example, if the shape and elasticity of the retainer 35 are appropriately set, when the operation main body 71 is pushed relatively strongly toward the one side in the axial direction, the annular engagement protrusion 47 is moved in the axial direction of the connection confirmation portion 75. It is pushed by one side end and snaps into the engagement slit 53 of the retainer 35.
[0033]
【The invention's effect】
As described above, in the quick connector of the present invention, connection confirmation can be performed simply by moving the operation body in the axial direction along the guide, and the connection confirmation work is facilitated. In addition, since the connection confirmation means or the operation main body and the connection confirmation unit remain attached to the quick connector even after the connection confirmation, there is no possibility of dropping or the like. Further, the quick connector of the present invention has an advantage that a change point on the connector housing side is such that a guide having a simple configuration is added.
[Brief description of the drawings]
FIG. 1 is a perspective view of a quick connector according to the present invention.
FIG. 2 is a cross-sectional view of a quick connector.
FIG. 3 is a perspective view of a retainer.
FIG. 4 is a cross-sectional view showing a state where a pipe body is inserted and connected to a quick connector.
FIG. 5 is an exploded perspective view showing details of connection confirmation means.
FIG. 6 is a bottom view of the connection confirmation tool.
FIG. 7 is a diagram illustrating a case where a pipe body is inserted into a quick connector.
FIG. 8 is a diagram illustrating a case where the connection state of the pipe body is confirmed, and is an explanatory diagram when the pipe body is normally connected.
FIG. 9 is a diagram illustrating a case where the connection state of the pipe body is confirmed, and is an explanatory diagram when the pipe body is in a half-fitted state.
[Explanation of symbols]
1 Quick connector
3 Connector housing
7 Tube connection
29 Connection confirmation means
31 Guide
35 Retainer (Retainer means)
45 Pipe body
47 Annular engagement protrusion
53 Engagement slit (connection engagement part)
55 Axial other side end opening
67 Concave part for confirmation (locking part)
71 Operation body
75 Connection confirmation part
85 Protruding part (engaging part)

Claims (3)

軸方向一方側にチューブ接続部が形成されたコネクタハウジングと、このコネクタハウジングの軸方向他方側に設けられたリテーナー手段と、軸方向他方側端開口から前記コネクタハウジング内に挿入されたパイプ体の環状係合突部が、周方向所定位置に非係合個所を有して前記リテーナー手段に形成された接続係合部とスナップ係合したことを確認するための接続確認手段と、を具備している半嵌合防止機能を有するクイックコネクタであって、
前記接続確認手段は、前記コネクタハウジングの外周に設けられた軸方向に延びるガイドと、前記ガイドに沿って、軸方向一方側の確認位置と軸方向他方側の退避位置との間を軸方向に移動可能な操作本体と、前記操作本体に設けられ、前記操作本体の軸方向への移動にともない前記コネクタハウジングの内周面に沿って軸方向に移動する接続確認部と、を備え、
前記操作本体は、前記確認位置に移動したときに、前記コネクタハウジングに形成されている係止部と軸方向に係合する係合部を有し、
前記接続確認部は、前記操作本体が前記退避位置に移動すると、前記パイプ体の前記コネクタハウジング内への挿入を許容するように軸方向他方側に移動し、
前記接続確認部の軸方向一方側端は、前記操作本体が前記確認位置に移動したときに、前記リテーナー手段の前記非係合個所で前記接続係合部とほぼ等しい軸方向位置まで達し
前記コネクタハウジングの軸方向他方側の内周面には、前記接続確認部の案内面が形成され、
前記案内面は、前記接続確認部が軸方向一方側に移動したときに、前記接続確認部の軸方向一方側端を径方向内側に案内し、前記接続確認部が軸方向他方側に移動したときに、前記接続確認部の軸方向一方側端を径方向外側に案内するように構成されていて、
前記接続確認部の軸方向一方側端は、前記案内面によって径方向内側に案内されながら、前記リテーナー手段の前記接続係合部とほぼ等しい軸方向位置まで達し、
前記接続確認部は、軸方向一方側端が前記案内面によって径方向外側に案内されて、前記パイプ体の前記コネクタハウジング内への挿入を許容する、ことを特徴とする半嵌合防止機能を有するクイックコネクタ。
A connector housing having a tube connecting portion formed on one side in the axial direction, a retainer means provided on the other side in the axial direction of the connector housing, and a pipe body inserted into the connector housing from the opening on the other side end in the axial direction Connection confirmation means for confirming that the annular engagement protrusion has snap-engaged with a connection engagement part formed on the retainer means having a non-engagement portion at a predetermined position in the circumferential direction. A quick connector having a half-fitting prevention function,
The connection confirmation means includes an axially extending guide provided on an outer periphery of the connector housing, and an axial direction between a confirmation position on one axial side and a retracted position on the other axial side along the guide. A movable operation main body, and a connection confirmation portion that is provided in the operation main body and moves in the axial direction along the inner peripheral surface of the connector housing as the operation main body moves in the axial direction.
The operation body, when moved to the identified position, have a engagement portion engaged with the locking portion in the axial direction are formed in said connector housing,
When the operation body moves to the retracted position, the connection confirmation unit moves to the other side in the axial direction so as to allow insertion of the pipe body into the connector housing,
One end in the axial direction of the connection confirmation portion reaches an axial position substantially equal to the connection engagement portion at the non-engagement portion of the retainer means when the operation body moves to the confirmation position .
On the inner peripheral surface on the other axial side of the connector housing, a guide surface of the connection confirmation portion is formed,
The guide surface guides one end in the axial direction of the connection confirmation part radially inward when the connection confirmation part moves to the one side in the axial direction, and the connection confirmation part moves to the other side in the axial direction. Sometimes, it is configured to guide the one end in the axial direction of the connection confirmation portion radially outward,
One end in the axial direction of the connection confirmation portion reaches an axial position substantially equal to the connection engagement portion of the retainer means while being guided radially inward by the guide surface.
The connection confirmation part has a half-fitting prevention function characterized in that one end in the axial direction is guided radially outward by the guide surface and allows the pipe body to be inserted into the connector housing. Having quick connector.
前記案内面は、軸方向一方側に向かって徐々に径方向内側に傾斜あるいは湾曲する押出し面部を軸方向一方側に備え、軸方向他方側に退避面部を有していて、The guide surface is provided with an extrusion surface portion that is gradually inclined or curved radially inward toward one side in the axial direction on one side in the axial direction, and has a retracting surface portion on the other side in the axial direction.
前記接続確認部の軸方向一方側端は前記押出し面部によって径方向内側に案内され、前記退避面部によって径方向外側に案内される、ことを特徴とする請求項1記載の半嵌合防止機能を有するクイックコネクタ。  2. The half-fitting prevention function according to claim 1, wherein one end in the axial direction of the connection confirmation portion is guided radially inward by the push-out surface portion and radially outward by the retracting surface portion. Having quick connector.
前記リテーナー手段は、周方向両端部間に変形用隙間が形成された断面C形に形成されて、前記コネクタハウジングの軸方向他方側に嵌め付けられていて、The retainer means is formed in a cross-section C shape in which a gap for deformation is formed between both circumferential ends, and is fitted to the other axial side of the connector housing,
前記接続確認部は、前記リテーナー手段の変形用隙間に位置して軸方向に移動する、ことを特徴とする請求項1又は2記載の半嵌合防止機能を有するクイックコネクタ。  The quick connector having a half-fitting prevention function according to claim 1, wherein the connection confirmation portion is located in a deformation gap of the retainer means and moves in the axial direction.
JP2002382638A 2002-12-27 2002-12-27 Quick connector with half-mating prevention function Expired - Fee Related JP3988191B2 (en)

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EP3736481B1 (en) * 2019-05-07 2022-01-19 A. Raymond et Cie Quick connector assembly with verification tab

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