JP4259836B2

JP4259836B2 - One-touch fitting

Info

Publication number: JP4259836B2
Application number: JP2002285635A
Authority: JP
Inventors: 孝信萩原; 憲一加勢
Original assignee: Yokohama Rubber Co Ltd
Current assignee: Yokohama Rubber Co Ltd
Priority date: 2002-09-30
Filing date: 2002-09-30
Publication date: 2009-04-30
Anticipated expiration: 2022-09-30
Also published as: JP2004124971A

Description

【０００１】
【発明の属する技術分野】
本発明は、流体移送用ホースの接続に使用されるワンタッチ継手に関し、更に詳しくは、ニップルの取り付け作業を容易にすると共に、ニップルをアダプタに確実に取り付けることができるようにしたワンタッチ継手に関する。
【０００２】
【従来の技術】
近年、高圧流体を移送するホースの接続に使用する継手として、ニップルの外周側にニップル軸方向に摺動自在に外装した分離用スリーブと、ニップル連結時にニップルの移動を規制する着脱可能なストッパとを用いるようにしたワンタッチ継手が公知になっている。（例えば、非特許文献１参照）。
【０００３】
この継手は、図９に示すように、弾性的に拡縮可能な環状ロック部材３１を内周側に配置した筒状のアダプタ３２、アダプタ３２に挿入した際にロック部材３１に係合する係合部３３を外周側に設けた筒状のニップル３４を備えている。ニップル３４の外周面には環状の幅広溝３５が形成され、この幅広溝３５の挿入側壁面が係合部３３になっている。幅広溝３５内には筒状の分離用スリーブ３６が摺動自在に配置されている。
【０００４】
ロック部材３１を係合部３３に係合させた状態で、アダプタ３２のニップル連結側端面３７とニップル３４の径大部３８との間にニップル３４の軸方向の動きを阻止するストッパ３９を嵌着することにより、ニップル３４を機器に取り付けたアダプタ３２に連結固定するようになっている。
【０００５】
ニップル３４を取り外すには、ストッパ３９を除去した後ニップル３４をアダプタ３２内に押し込み、それに伴って前進してロック部材３１に押し当たる分離用スリーブ３６によりロック部材３１を押し拡げて分離用スリーブ３６の先端部外周面４０上に押し上げることにより、係合部３３とロック部材３１との係合を解除してニップル３４をアダプタ３２から分離できるようにしている。
【０００６】
【非特許文献１】
ＣＥＪＮＡＢ（セイン社〔スウェーデン〕）ホームページ〔平成１４年８月１０日検索〕、インターネット〔ＵＲＬ：http://www.plug-in.nu/eng/teknik/scen.html〕
【０００７】
【発明が解決しようとする課題】
しかしながら、上述したワンタッチ継手は、ニップル３４をアダプタ３２に挿入する際に、摺動自在な分離用スリーブ３６が幅広溝３５の反挿入側壁面側（図の右側）にある場合には問題なくロック部材３１が係合部３３に係合するが、挿入側壁面（係合部３３）に当接した状態になっている場合には、ロック部材３１が分離用スリーブ３６上に乗り上げ、係合部３３に係合しないことがあり、ニップル３４をアダプタ３２に常に確実に取り付けることができない。
【０００８】
そこで、ニップル３４をアダプタ３２に確実に取り付けるためには、分離用スリーブ３６が幅広溝３５の反挿入側壁面側にあることをニップル３４を挿入する際に常に確認する作業が必要になるが、それがニップル３４の取り付け作業を煩雑にするという問題があった。
【０００９】
本発明の目的は、分離用スリーブの位置確認を不要にし、ニップルの取り付け作業を容易にすることができると共に、ニップルをアダプタに確実に取り付けることが可能なワンタッチ継手を提供することを目的とする。
【００１０】
【課題を解決するための手段】
上記目的を達成する本発明のワンタッチ継手は、弾性的に拡縮可能なＣ型のロック部材を内周側に配置した筒状のアダプタと、該アダプタに挿入した際に前記ロック部材が係合可能な係合部を外周側に設けた筒状のニップルと、前記係合部よりニップル反挿入側の前記ニップルの外周側に該ニップルの軸方向に所定の範囲で摺動自在に配置した筒状の分離用スリーブと、前記ニップル連結時に該ニップルの移動を規制する着脱可能なストッパとを有し、前記ニップルを前記アダプタ内に挿入して前記係合部に前記ロック部材を係合させ、かつ装着した前記ストッパにより前記ニップルの軸方向の動きを阻止することにより、前記ニップルを前記アダプタに連結し、前記ストッパを取り外した後前記ニップルを前記アダプタ内に押し入れ、それに伴って前進する前記分離用スリーブにより前記ロック部材を押し拡げて該分離用スリーブの先端部外周面上に押し上げることにより、前記係合部と前記ロック部材との係合を解除して前記ニップルを前記アダプタから分離可能にしたワンタッチ継手において、前記分離用スリーブの先端部外周面に前記ロック部材が係合可能な係合溝を形成するとともに、前記ニップル連結時に前記分離用スリーブをその後部側が前記アダプタから出状態となるように延在する構成にし、前記分離用スリーブの後端部外周面に周方向に沿ってフランジ部を突設し、該フランジ部と前記アダプタのニップル連結側端面との間の分離用スリーブ外周側に前記ストッパを着脱自在に装着することを特徴とする。
また、本発明の別のワンタッチ継手は、前記ニップル連結時に前記分離用スリーブをその後部側が前記アダプタから出状態となるように延在する構成にし、前記分離用スリーブの後端部外周面に周方向に沿ってフランジ部を突設し、該フランジ部と前記アダプタのニップル連結側端面との間の分離用スリーブ外周側に前記ストッパを着脱自在に装着するとともに、前記ストッパを伸縮可能なゴムリングから構成し、かつ装着時に前記分離用スリーブと前記アダプタとの接触端及び前記分離用スリーブと前記ニップルとの接触端を被覆可能に構成したことを特徴とする。
【００１１】
上述した本発明によれば、ストッパを分離用スリーブ外周側に装着した状態でニップルを挿入することができ、ロック部材が係合部に係合する際に分離用スリーブを係合部から離間した状態に維持できるので、ロック部材が分離用スリーブ上に乗り上げることなく係合部に常に係合する。従って、分離用スリーブの位置確認を不要にし、ニップルの取り付け作業を容易にすることができると共に、ニップルをアダプタに確実に取り付けることができる。
【００１２】
【発明の実施の形態】
以下、本発明のワンタッチ継手について、図面を参照しながら詳細に説明する。
【００１３】
図１は、本発明のワンタッチ継手の一例を示し、１はアダプタ、２はニップルである。アダプタ１は金属材料から円筒状に形成され、一端側の外周面にネジ部１１が形成され、このネジ部１１を介して機器Ｍに連結固定されるようになっている。アダプタ１の内周面１２は、一端側の径小内周面１２ａ、それに続く径中内周面１２ｂ、及び他端側（ニップル連結側）の径大内周面１２ｃから構成され、径大内周面１２ｃに周方向に沿って延在する環状溝３が形成されている。
【００１４】
この環状溝３内に弾性的に拡縮可能な断面円形状のＣ型バネリング（ロック部材）４が環状溝３から部分的に突出するように配設されている。環状溝３は、Ｃ型バネリング４がアダプタ１の軸方向に移動可能な溝幅を有し、他端側の溝壁面（ニップル連結側壁面）３ａにＣ型バネリング４をロックするための傾斜面３ｂが形成されている。
【００１５】
ニップル２は、金属材料から円筒状に形成され、一端側がアダプタ１に挿入され、他端側にソケット５を介してホースＨを加締め固定するようになっている。ニップル２は、一端側（ニップル挿入側）の外径を小さくした径小部２１と、これに続く外径を大きくした径大部２２とを有し、径小部２１がアダプタ１の径中内周面１２ｂに摺動自在に嵌合し、径大部２２が径大内周面１２ｃに摺動自在に嵌合する。
【００１６】
径小部２１の外周面２１ａには周方向に沿って延在する環状溝６が形成され、この環状溝６内に径中内周面１２ｂと当接可能なシール用のＯリング７とバックアップリング８が配置してある。
【００１７】
径大部２２の外周面２２ａには、周方向に沿って延在する環状の幅広溝部２３が形成されている。この幅広溝部２３はニップル２をアダプタ１に連結した際に、アダプタ１の外側まで延在する溝幅を有しており、幅広溝部２３の一端側にＣ型バネリング４に係合可能な係合部２４が周方向に沿って環状に突出するように設けれられている。
【００１８】
係合部２４は、他端側（ニップル反挿入側）にＣ型バネリング４をロックするための係合傾斜面２４ａを有している。この係合傾斜面２４ａは外周端側が内周側よりニップル２の一端側となるような傾斜面に形成され、図１に示すように、この係合傾斜面２４ａと環状溝３の傾斜面３ｂとの間でＣ型バネリング４をロック可能にしてある。係合部２４の一端側も傾斜面２４ｂに形成してあり、Ｃ型バネリング４を拡開して係合部２４の頂部を乗り越え易くしている。
【００１９】
係合部２４より他端側に位置する幅広溝部２３に、ポリアセタール、ナイロン、ポリテトラフルオロエチレン等の樹脂製または金属製の円筒状の分離用スリーブ９（図２参照）がニップル２の軸方向に溝幅（所定の範囲）内で摺動自在に配置されている。分離用スリーブ９の外周面９Ｘと係合部２４の外周端面２４ｃとは、略面一となるようにしている。
【００２０】
分離用スリーブ９は、ニップル２の連結時にその後部側がアダプタ１から出状態となるように延在する構成になっており、その後端部外周面には周方向に沿って環状のフランジ部９ａが突設されている。分離用スリーブ９の先端面９ｂは、外周端側が内周端側より後方となるようにした傾斜面に形成されている。
【００２１】
分離用スリーブ９には先端から後端まで延在するスリット９ｃが形成され、このスリット９ｃにより分離用スリーブ９を径方向外側に拡開可能にすることで、分離用スリーブ９をニップル２の一端側から係合部２４を乗り越えて幅広溝部２３に取り付け易くしてある。分離用スリーブ９の先端部外周面には、Ｃ型バネリング４が係合可能な環状の係合溝９ｄが形成されている。
【００２２】
ニップル２の連結時に、フランジ部９ａとアダプタ１のニップル連結側端面１３との間の分離用スリーブ外周側に、図３（ｂ）に示すようにＣ字状に形成したストッパ１０が着脱自在に装着される。このストッパ１０は、弾性を有する樹脂や硬質ゴムなどからなる弾性体から構成され、図３（ａ）に示すように屈曲した形状に形成され、装着時にニップル２を他端側に常時付勢することにより、連結したニップル２の軸方向の移動を規制し、かつ係合傾斜面２４ａと環状溝３の傾斜面３ｂとの間でＣ型バネリング４を挟持してロックできるようにしている。
【００２３】
上記ワンタッチ継手は、以下のようにして連結する。先ず、図４に示すようにストッパ１０を分離用スリーブ９の外周側に取り付け、この状態でニップル２をアダプタ１内に挿入し、奥まで押し込む。これにより、挿入されたニップル２の係合部２４の傾斜面２４ｂによりＣ型バネリング４が押し拡げられ、係合部２４の頂部を乗り越えて係合傾斜面２４ａに係合する。
【００２４】
ストッパ１０により分離用スリーブ９を係合部２４から離間した状態となるため、Ｃ型バネリング４が分離用スリーブ９上に乗り上げることなく係合部２４に常に係合する。
【００２５】
ストッパ１０の弾性力により、分離用スリーブ９を介してニップル２が他端側に付勢されるため、ニップル２の軸方向の動きが阻止され、かつＣ型バネリング４が環状溝３の傾斜面３ｂと係合部２４の係合傾斜面２４ａとの間にロックされた状態となり、ニップル２がアダプタ１に連結固定される（図１の状態）。
【００２６】
ワンタッチ継手を分離するには、ストッパ１０を取り外した後、ニップル２をアダプタ１内に押し入れる。それにより、Ｃ型バネリング４が環状溝３の溝壁面（他端側の溝壁面３ａと対面する溝壁面）３ｘに当接し、そのＣ型バネリング４に前進して押し当たる分離用スリーブ９により、Ｃ型バネリング４を押し拡げて分離用スリーブ９の先端部外周面上に押し上げ、係合溝９ｄに係合させる（図５の状態）。これにより、係合部２４とＣ型バネリング４との係合が解除する。
【００２７】
この状態でニップル２を引き抜くと、それに伴って移動する係合部２４が分離用スリーブ９の先端に押し当たり（図６の状態）、Ｃ型バネリング４を環状溝３内に残した状態でニップル２が引き抜かれ、アダプタ１から分離する。
【００２８】
上述した本発明では、ストッパ１０をスリーブ外周側に装着した状態でニップル２を挿入することができるので、Ｃ型バネリング４が係合部２４に係合する際に分離用スリーブ９を係合部２４から離間した状態に維持できる。その結果、Ｃ型バネリング４が分離用スリーブ９上に乗り上げることなく係合部２４に常に係合できる。そのため、従来のような分離用スリーブ９の位置確認が不要になり、ニップル２の取り付け作業が容易となり、かつニップル２をアダプタ１に確実に連結することができる。
【００２９】
また、上述したワンタッチ継手では、ストッパ１０を外した状態でニップル２をアダプタ１に挿入し、最後にストッパ１０を装着しても、ニップル２をアダプタ１に確実に連結できるようにしている。
【００３０】
即ち、ストッパ１０を外した状態で、ニップル２をアダプタ１内に挿入し、奥まで押し込む。これにより、挿入されたニップル２の係合部２４の傾斜面２４ｂによりＣ型バネリング４が押し拡げられ、係合部２４を乗り越えて幅広溝部２３に係合する。
【００３１】
この際に、分離用スリーブ９が係合部２４に当接した状態であっても、分離用スリーブ９の先端面９ｂが上述した傾斜面になっているので、Ｃ型バネリング４が分離用スリーブ９の先端面９ｂの上端に当たり、分離用スリーブ９を他端側に移動させるので、幅広溝部２３に係合し、分離用スリーブ９上に乗り上げることがない。
【００３２】
次いで、ニップル２を他端側に引き戻す。これにより、Ｃ型バネリング４が環状溝３の傾斜面３ｂと係合部２４の係合傾斜面２４ａとに挟まれて係合した状態となる。続いて、ストッパ１０を分離用スリーブ９のフランジ部９ａとアダプタ１のニップル連結側端面１３との間の分離用スリーブ外周側に嵌める。
【００３３】
この際に、作業者が誤って分離用スリーブ９を一端側に押し付けた状態でニップル２を挿入し、分離用スリーブ９上にＣ型バネリング４が乗り上げて係合部２４に係合していない状態が発生した場合には、フランジ部９ａとニップル連結側端面１３との間隔が狭くなり、ストッパ１０が嵌まらない、あるいは嵌まり難い状態となるので、Ｃ型バネリング４が係合部２４に係合していないことが容易にわかる。
【００３４】
ストッパ１０の装着によりストッパ１０が分離用スリーブ９を介してニップル２を他端側に弾性付勢し、ニップル２の軸方向の動きを阻止すると共に、Ｃ型バネリング４を環状溝３の傾斜面３ｂと係合部２４の係合傾斜面２４ａとの間にロックした状態にし、ニップル２がアダプタ１に連結固定される（図１の状態）。
【００３５】
ワンタッチ継手の分離は上記と同様に行うが、Ｃ型バネリング４が断面円形状のため、当接する係合部２４と分離用スリーブ９の先端面９ｂとによって形成される窪み部Ｘ（図６参照）にＣ型バネリング４が引っ掛かって係止することなく、ニップル２を円滑に抜き取ることができるのである。
【００３６】
図７は、本発明のワンタッチ継手の他の例を示し、この実施形態では、上述したストッパ１０に防塵機能を持たせるようにしたものである。図７のストッパ１０’は、図８に示すように、二股状の脚部１０’Ａ，１０’Ｂを有する伸縮可能なゴムリングから構成され、一方の脚部１０’Ａが分離用スリーブ９のフランジ部９ａとアダプタ１のニップル連結側端面１３との間の間隔より若干厚くなっており、そのフランジ部９ａとニップル連結側端面１３との間に押し込んで弾性変形させ、圧着することにより、上述したストッパ１０と同様のストッパ機能と、ニップル連結側端面１３と分離用スリーブ９との接触端に対するダストシール効果を発揮させるようにしている。
【００３７】
また、ストッパ１０’を装着した際に、他方の脚部１０’Ｂが分離用スリーブ９のフランジ部９ａに隣接するニップル２の外周面に当接し、分離用スリーブ９とニップル２との接触端に対するダストシール効果を発揮するようになっている。
【００３８】
このようにストッパ１０’を、分離用スリーブ９とアダプタ１の接触端及び分離用スリーブ９とニップル２の接触端を被覆する構成にすることで、１つの部材でストッパ機能と防塵機能を同時に行うことができる。
【００３９】
ニップル２をアダプタ１から分離する際には、伸縮するストッパ１０’を弾性変形させてニップル５側に移動させることで、一方の脚部１０’Ａを分離用スリーブ９のフランジ部９ａとアダプタ１のニップル連結側端面１３との間から離脱するようにする。
【００４０】
【発明の効果】
上述したように本発明のワンタッチ継手は、分離用スリーブの後端部に設けたフランジ部とアダプタのニップル連結側端面との間のスリーブ外周側にストッパを着脱自在に装着できるようにしたので、ニップル挿入時に分離用スリーブの位置を確認する必要がなくなり、ニップルの取り付け作業を容易にすることができ、かつアダプタに対するニップルの確実の取り付けが可能になる。
【図面の簡単な説明】
【図１】本発明のワンタッチ継手の一例を連結した状態で一部を切欠いた断面にして示す正面図である。
【図２】図１の分離用スリーブの斜視図である。
【図３】図１のストッパを示し、（ａ）は正面図、（ｂ）は側面図である。
【図４】図１のワンタッチ継手の連結工程の要部を一部を切欠いた断面で示す正面図である。
【図５】図１のワンタッチ継手の分離工程の要部を一部を切欠いた断面で示す正面図である。
【図６】図５に続く分離状態を一部を切欠いた断面で示す正面図である。
【図７】本発明のワンタッチ継手の他の例を連結した状態で一部を切欠いた断面にして示す正面図である。
【図８】図７のストッパを示し、（ａ）は（ｂ）のａ−ａ矢視断面図、（ｂ）は（ａ）のｂ−ｂ矢視図である。
【図９】従来のワンタッチ継手を示す要部半断面図である。
【符号の説明】
１アダプタ２ニップル
３環状溝３ａ溝壁面（ニップル連結側壁面）
３ｂ傾斜面４Ｃ型バネリング（ロック部材）
９分離用スリーブ９ａフランジ部
９ｂ先端面９ｄ係合溝
１０，１０’ストッパ１２内周面
１３ニップル連結側端面２３幅広溝部
２４係合部２４ａ係合傾斜面
Ｈホース[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a one-touch joint used for connecting a fluid transfer hose, and more particularly, to a one-touch joint that facilitates an attachment operation of a nipple and allows the nipple to be securely attached to an adapter.
[0002]
[Prior art]
In recent years, as a joint used for connecting a hose for transferring a high-pressure fluid, a separation sleeve externally slidable in the nipple axial direction on the outer periphery of the nipple, and a detachable stopper for restricting the movement of the nipple when the nipple is connected One-touch joints that use the above are known. (For example, refer nonpatent literature 1).
[0003]
As shown in FIG. 9, this joint includes a cylindrical adapter 32 arranged on the inner circumferential side of an annular lock member 31 that can be elastically expanded and contracted, and an engagement that engages with the lock member 31 when inserted into the adapter 32. A cylindrical nipple 34 provided with a portion 33 on the outer peripheral side is provided. An annular wide groove 35 is formed on the outer peripheral surface of the nipple 34, and an insertion side wall surface of the wide groove 35 serves as an engaging portion 33. A cylindrical separation sleeve 36 is slidably disposed in the wide groove 35.
[0004]
With the lock member 31 engaged with the engaging portion 33, a stopper 39 that prevents the nipple 34 from moving in the axial direction is fitted between the nipple connecting side end surface 37 of the adapter 32 and the large diameter portion 38 of the nipple 34. By wearing, the nipple 34 is connected and fixed to the adapter 32 attached to the device.
[0005]
To remove the nipple 34, after removing the stopper 39, the nipple 34 is pushed into the adapter 32, and the lock member 31 is expanded by the separation sleeve 36 that moves forward and presses against the lock member 31, thereby separating the sleeve 36. By pushing up on the outer peripheral surface 40 of the front end portion of the front end portion, the engagement between the engaging portion 33 and the lock member 31 is released so that the nipple 34 can be separated from the adapter 32.
[0006]
[Non-Patent Document 1]
CEJN AB (Cein [Sweden]) homepage [searched on August 10, 2002], Internet [URL: http://www.plug-in.nu/eng/teknik/scen.html]
[0007]
[Problems to be solved by the invention]
However, the above-described one-touch joint locks without problems when the slidable separating sleeve 36 is on the side opposite to the side wall surface (the right side in the figure) of the wide groove 35 when the nipple 34 is inserted into the adapter 32. When the member 31 engages with the engagement portion 33 but is in contact with the insertion side wall surface (engagement portion 33), the lock member 31 rides on the separation sleeve 36, and the engagement portion The nipple 34 may not always be securely attached to the adapter 32.
[0008]
Therefore, in order to securely attach the nipple 34 to the adapter 32, it is necessary to always confirm that the separating sleeve 36 is on the side opposite to the side wall surface of the wide groove 35 when inserting the nipple 34. This has a problem that the installation work of the nipple 34 is complicated.
[0009]
SUMMARY OF THE INVENTION An object of the present invention is to provide a one-touch joint that eliminates the need for confirming the position of a separating sleeve, facilitates the nipple mounting operation, and can securely mount the nipple to an adapter. .
[0010]
[Means for Solving the Problems]
The one-touch joint of the present invention that achieves the above object is a cylindrical adapter in which an elastically expandable / contractable C-shaped lock member is disposed on the inner peripheral side, and the lock member can be engaged when inserted into the adapter. A cylindrical nipple provided with an engaging part on the outer peripheral side, and a cylindrical slidable arrangement within a predetermined range in the axial direction of the nipple on the outer peripheral side of the nipple on the side opposite to the nipple from the engaging part And a detachable stopper for restricting movement of the nipple when the nipple is connected, and inserting the nipple into the adapter to engage the lock member with the engaging portion; and By connecting the nipple to the adapter by preventing the axial movement of the nipple by the stopper that is mounted, after removing the stopper, the nipple is pushed into the adapter, The separation member that moves forward with the separation sleeve pushes the locking member and pushes it up onto the outer peripheral surface of the distal end portion of the separation sleeve, thereby releasing the engagement between the engagement portion and the locking member. In the one-touch joint that is separable from the adapter, an engaging groove that can engage the lock member is formed on the outer peripheral surface of the distal end portion of the separating sleeve , and the separating sleeve is disposed on the rear side when the nipple is connected. The flange extends from the adapter so as to be in a protruding state, and a flange portion is provided along the circumferential direction on the outer peripheral surface of the rear end portion of the separation sleeve, and the flange portion and the nipple connection side end surface of the adapter The stopper is detachably mounted on the outer peripheral side of the separation sleeve.
In another one-touch joint of the present invention, when the nipple is connected, the separation sleeve extends so that a rear side of the separation sleeve comes out from the adapter, and is arranged around the outer peripheral surface of the rear end portion of the separation sleeve. A rubber ring that protrudes along the direction and detachably attaches the stopper to the outer peripheral side of the separation sleeve between the flange and the nipple connection side end surface of the adapter, and the stopper can be expanded and contracted And the contact end between the separation sleeve and the adapter and the contact end between the separation sleeve and the nipple can be covered when mounted.
[0011]
According to the present invention described above, the nipple can be inserted in a state where the stopper is mounted on the outer peripheral side of the separation sleeve, and the separation sleeve is separated from the engagement portion when the lock member is engaged with the engagement portion. Since the state can be maintained, the locking member always engages with the engaging portion without riding on the separating sleeve. Therefore, it is not necessary to confirm the position of the separating sleeve, the nipple can be easily attached, and the nipple can be securely attached to the adapter.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the one-touch coupling of the present invention will be described in detail with reference to the drawings.
[0013]
FIG. 1 shows an example of the one-touch joint of the present invention, where 1 is an adapter and 2 is a nipple. The adapter 1 is formed in a cylindrical shape from a metal material, and a screw portion 11 is formed on an outer peripheral surface on one end side, and is connected and fixed to the device M via the screw portion 11. The inner peripheral surface 12 of the adapter 1 is composed of a small-diameter inner peripheral surface 12a on one end side, followed by a medium-diameter inner peripheral surface 12b, and a large-diameter inner peripheral surface 12c on the other end side (nipple connection side). An annular groove 3 extending along the circumferential direction is formed in the inner peripheral surface 12c.
[0014]
A C-shaped spring ring (lock member) 4 having a circular cross section that can be elastically expanded and contracted is disposed in the annular groove 3 so as to partially protrude from the annular groove 3. The annular groove 3 has a groove width that allows the C-type spring ring 4 to move in the axial direction of the adapter 1, and is an inclined surface for locking the C-type spring ring 4 to the groove wall surface (nipple connecting side wall surface) 3a on the other end side. 3b is formed.
[0015]
The nipple 2 is formed in a cylindrical shape from a metal material, one end side is inserted into the adapter 1, and the hose H is crimped and fixed to the other end side via a socket 5. The nipple 2 has a small-diameter portion 21 in which the outer diameter on one end side (nipple insertion side) is reduced, and a large-diameter portion 22 in which the outer diameter is subsequently increased, and the small-diameter portion 21 is in the diameter of the adapter 1. The inner peripheral surface 12b is slidably fitted, and the large-diameter portion 22 is slidably fitted to the large-diameter inner peripheral surface 12c.
[0016]
An annular groove 6 extending in the circumferential direction is formed on the outer peripheral surface 21a of the small diameter portion 21, and a sealing O-ring 7 capable of contacting the inner diameter peripheral surface 12b and a backup are provided in the annular groove 6. A ring 8 is arranged.
[0017]
An annular wide groove portion 23 extending in the circumferential direction is formed on the outer peripheral surface 22 a of the large diameter portion 22. The wide groove portion 23 has a groove width that extends to the outside of the adapter 1 when the nipple 2 is connected to the adapter 1, and can be engaged with the C-shaped spring ring 4 on one end side of the wide groove portion 23. The part 24 is provided so as to protrude annularly along the circumferential direction.
[0018]
The engaging portion 24 has an engaging inclined surface 24a for locking the C-type spring ring 4 on the other end side (the nipple non-insertion side). The engagement inclined surface 24a is formed in an inclined surface such that the outer peripheral end side is one end side of the nipple 2 from the inner peripheral side. As shown in FIG. 1, the engagement inclined surface 24a and the inclined surface 3b of the annular groove 3 are formed. The C-shaped spring ring 4 can be locked between them. One end side of the engaging portion 24 is also formed on the inclined surface 24b, and the C-shaped spring ring 4 is expanded so that the top of the engaging portion 24 can be easily climbed over.
[0019]
A cylindrical separation sleeve 9 (see FIG. 2) made of resin or metal such as polyacetal, nylon, polytetrafluoroethylene, or the like is positioned in the axial direction of the nipple 2 in the wide groove portion 23 positioned on the other end side from the engagement portion 24. Are slidably arranged within the groove width (predetermined range). The outer peripheral surface 9X of the separation sleeve 9 and the outer peripheral end surface 24c of the engaging portion 24 are substantially flush with each other.
[0020]
The separation sleeve 9 is configured to extend so that the rear side thereof comes out of the adapter 1 when the nipple 2 is connected, and an annular flange portion 9a is formed on the outer peripheral surface of the rear end portion along the circumferential direction. Projected. The distal end surface 9b of the separation sleeve 9 is formed in an inclined surface such that the outer peripheral end side is located behind the inner peripheral end side.
[0021]
The separation sleeve 9 is formed with a slit 9c extending from the front end to the rear end. The slit 9c allows the separation sleeve 9 to be expanded radially outward, so that the separation sleeve 9 is connected to one end of the nipple 2. It is easy to attach to the wide groove portion 23 over the engaging portion 24 from the side. An annular engagement groove 9 d with which the C-shaped spring ring 4 can be engaged is formed on the outer peripheral surface of the distal end portion of the separation sleeve 9.
[0022]
When the nipple 2 is connected, a stopper 10 formed in a C shape as shown in FIG. 3B is detachable on the outer peripheral side of the separation sleeve between the flange portion 9a and the nipple connection side end face 13 of the adapter 1. Installed. The stopper 10 is made of an elastic body made of elastic resin, hard rubber, or the like, is formed in a bent shape as shown in FIG. 3A, and always urges the nipple 2 to the other end side when mounted. Thus, the movement of the connected nipple 2 in the axial direction is restricted, and the C-type spring ring 4 is sandwiched and locked between the engagement inclined surface 24 a and the inclined surface 3 b of the annular groove 3.
[0023]
The one-touch joint is connected as follows. First, as shown in FIG. 4, the stopper 10 is attached to the outer peripheral side of the separating sleeve 9, and in this state, the nipple 2 is inserted into the adapter 1 and pushed into the back. As a result, the C-shaped spring ring 4 is pushed and expanded by the inclined surface 24b of the engaging portion 24 of the inserted nipple 2 and gets over the top of the engaging portion 24 and engages with the engaging inclined surface 24a.
[0024]
Since the separating sleeve 9 is separated from the engaging portion 24 by the stopper 10, the C-shaped spring ring 4 is always engaged with the engaging portion 24 without riding on the separating sleeve 9.
[0025]
The nipple 2 is biased to the other end side by the elastic force of the stopper 10 via the separating sleeve 9, so that the axial movement of the nipple 2 is prevented and the C-shaped spring ring 4 is inclined on the inclined surface of the annular groove 3. 3b and the engaging inclined surface 24a of the engaging portion 24 are locked, and the nipple 2 is connected and fixed to the adapter 1 (state shown in FIG. 1).
[0026]
To separate the one-touch joint, the nipple 2 is pushed into the adapter 1 after removing the stopper 10. As a result, the C-shaped spring ring 4 abuts against the groove wall surface 3x of the annular groove 3 (the groove wall surface facing the groove wall surface 3a on the other end side) 3x, and the separation sleeve 9 advances and contacts the C-shaped spring ring 4 The C-shaped spring ring 4 is pushed up and pushed up on the outer peripheral surface of the distal end portion of the separating sleeve 9 and engaged with the engaging groove 9d (state shown in FIG. 5). As a result, the engagement between the engagement portion 24 and the C-shaped spring ring 4 is released.
[0027]
When the nipple 2 is pulled out in this state, the engaging portion 24 that moves with the nipple 2 presses against the tip of the separation sleeve 9 (the state shown in FIG. 6), and the nipple is left in the state where the C-shaped spring ring 4 remains in the annular groove 3. 2 is pulled out and separated from the adapter 1.
[0028]
In the present invention described above, since the nipple 2 can be inserted with the stopper 10 mounted on the outer peripheral side of the sleeve, the separating sleeve 9 is engaged with the engaging portion when the C-type spring ring 4 is engaged with the engaging portion 24. It can be kept away from 24. As a result, the C-shaped spring ring 4 can always be engaged with the engaging portion 24 without riding on the separating sleeve 9. Therefore, it is not necessary to confirm the position of the separation sleeve 9 as in the prior art, the nipple 2 can be easily attached, and the nipple 2 can be securely connected to the adapter 1.
[0029]
In the one-touch joint described above, the nipple 2 can be securely connected to the adapter 1 even when the nipple 2 is inserted into the adapter 1 with the stopper 10 removed and the stopper 10 is finally attached.
[0030]
That is, with the stopper 10 removed, the nipple 2 is inserted into the adapter 1 and pushed to the back. As a result, the C-shaped spring ring 4 is pushed and expanded by the inclined surface 24 b of the engaging portion 24 of the inserted nipple 2, gets over the engaging portion 24 and engages with the wide groove portion 23.
[0031]
At this time, even when the separation sleeve 9 is in contact with the engaging portion 24, the tip surface 9b of the separation sleeve 9 is the above-described inclined surface, so that the C-type spring ring 4 is used as the separation sleeve. 9, the separation sleeve 9 is moved to the other end side so that it does not engage with the wide groove 23 and ride on the separation sleeve 9.
[0032]
Next, the nipple 2 is pulled back to the other end side. As a result, the C-shaped spring ring 4 is sandwiched and engaged between the inclined surface 3b of the annular groove 3 and the engaging inclined surface 24a of the engaging portion 24. Subsequently, the stopper 10 is fitted on the outer peripheral side of the separation sleeve between the flange portion 9 a of the separation sleeve 9 and the nipple connection side end face 13 of the adapter 1.
[0033]
At this time, the nipple 2 is inserted in a state where the operator accidentally presses the separation sleeve 9 to one end side, and the C-shaped spring ring 4 rides on the separation sleeve 9 and is not engaged with the engaging portion 24. When the state occurs, the gap between the flange portion 9a and the nipple connecting side end face 13 becomes narrow, and the stopper 10 does not fit or is difficult to fit. It can be easily seen that the engagement is not made.
[0034]
When the stopper 10 is attached, the stopper 10 elastically biases the nipple 2 to the other end side through the separation sleeve 9 to prevent the nipple 2 from moving in the axial direction, and the C-shaped spring ring 4 is connected to the inclined surface of the annular groove 3. 3b and the engaging inclined surface 24a of the engaging portion 24 are locked, and the nipple 2 is connected and fixed to the adapter 1 (state shown in FIG. 1).
[0035]
The one-touch joint is separated in the same manner as described above. However, since the C-shaped spring ring 4 has a circular cross section, a recess X (see FIG. 6) formed by the engaging portion 24 and the distal end surface 9b of the separation sleeve 9 are in contact. The nipple 2 can be smoothly extracted without the C-type spring ring 4 being hooked and locked.
[0036]
FIG. 7 shows another example of the one-touch joint of the present invention. In this embodiment, the stopper 10 described above is provided with a dustproof function. As shown in FIG. 8, the stopper 10 ′ of FIG. 7 is composed of a stretchable rubber ring having bifurcated leg portions 10 ′ A and 10 ′ B, and one leg portion 10 ′ A is the separation sleeve 9. The gap between the flange portion 9a and the nipple connection side end surface 13 of the adapter 1 is slightly thicker. By pressing between the flange portion 9a and the nipple connection side end surface 13 to be elastically deformed and pressure-bonded, A stopper function similar to that of the stopper 10 described above and a dust seal effect on the contact end between the nipple connecting side end face 13 and the separation sleeve 9 are exhibited.
[0037]
Further, when the stopper 10 ′ is mounted, the other leg portion 10 ′ B comes into contact with the outer peripheral surface of the nipple 2 adjacent to the flange portion 9 a of the separation sleeve 9, and the contact end between the separation sleeve 9 and the nipple 2 is reached. Dust seal effect is demonstrated.
[0038]
Thus, the stopper 10 ′ is configured to cover the contact end of the separation sleeve 9 and the adapter 1 and the contact end of the separation sleeve 9 and the nipple 2 so that the stopper function and the dustproof function can be simultaneously performed by one member. be able to.
[0039]
When separating the nipple 2 from the adapter 1, the stopper 10 ′ that expands and contracts is elastically deformed and moved toward the nipple 5, so that one leg portion 10 ′ A is connected to the flange portion 9 a of the separation sleeve 9 and the adapter 1. It is made to detach | leave from between the nipple connection side end surfaces 13 of this.
[0040]
【The invention's effect】
As described above, the one-touch joint of the present invention is configured so that the stopper can be detachably attached to the sleeve outer peripheral side between the flange portion provided at the rear end portion of the separation sleeve and the nipple connection side end surface of the adapter. There is no need to confirm the position of the separating sleeve when inserting the nipple, the nipple can be easily attached, and the nipple can be securely attached to the adapter.
[Brief description of the drawings]
FIG. 1 is a front view showing a cross-sectional view with a part cut away in a state where an example of a one-touch joint of the present invention is connected.
2 is a perspective view of the separation sleeve of FIG. 1. FIG.
3 shows the stopper of FIG. 1, wherein (a) is a front view and (b) is a side view. FIG.
4 is a front view showing a main part of a connection process of the one-touch joint of FIG.
5 is a front view showing a main part of a separation process of the one-touch joint of FIG.
6 is a front view showing the separated state following FIG. 5 in a partially cutaway cross section. FIG.
FIG. 7 is a front view showing a cross-section with a part cut away in a state where another example of the one-touch joint of the present invention is connected.
8 shows the stopper of FIG. 7, in which (a) is a sectional view taken along the line aa of (b), and (b) is a sectional view taken along the line bb of (a).
FIG. 9 is a half sectional view of a main part showing a conventional one-touch joint.
[Explanation of symbols]
1 Adapter 2 Nipple 3 Annular groove 3a Groove wall surface (nipple connection side wall surface)
3b Inclined surface 4 C type spring ring (locking member)
DESCRIPTION OF SYMBOLS 9 Separation sleeve 9a Flange part 9b Tip end surface 9d Engagement groove | channel 10, 10 'stopper 12 Inner peripheral surface 13 Nipple connection side end surface 23 Wide groove part 24 Engagement part 24a Engagement inclined surface H Hose

Claims

A cylindrical adapter in which an elastically expandable / contractable C-shaped lock member is arranged on the inner peripheral side, and a cylindrical shape in which an engaging portion that can be engaged with the lock member when inserted into the adapter is provided on the outer peripheral side And a cylindrical separation sleeve slidably disposed in a predetermined range in the axial direction of the nipple on the outer peripheral side of the nipple on the side opposite to the nipple from the engagement portion, and the nipple when the nipple is connected. A removable stopper that regulates the movement of the
The nipple is connected to the adapter by inserting the nipple into the adapter, engaging the locking member with the engaging portion, and preventing the axial movement of the nipple with the stopper. ,
After the stopper is removed, the nipple is pushed into the adapter, and the locking member is pushed and expanded by the separating sleeve that moves forward along therewith, thereby pushing the engaging member up onto the outer peripheral surface of the distal end portion of the separating sleeve. In the one-touch joint in which the engagement between the part and the lock member is released to enable the nipple to be separated from the adapter,
An engaging groove that can be engaged with the lock member is formed on the outer peripheral surface of the distal end portion of the separating sleeve, and the separating sleeve extends so that the rear side of the separating sleeve comes out of the adapter when the nipple is connected. A flange portion is projected along the circumferential direction on the outer peripheral surface of the rear end portion of the separation sleeve, and the stopper is disposed on the outer peripheral side of the separation sleeve between the flange portion and the end surface on the nipple connection side of the adapter. One-touch fitting that can be attached and detached.

A cylindrical adapter in which an elastically expandable / contractable C-shaped lock member is arranged on the inner peripheral side, and a cylindrical shape in which an engaging portion that can be engaged with the lock member when inserted into the adapter is provided on the outer peripheral side And a cylindrical separation sleeve slidably disposed in a predetermined range in the axial direction of the nipple on the outer peripheral side of the nipple on the side opposite to the nipple from the engagement portion, and the nipple when the nipple is connected. A removable stopper that regulates the movement of the
The nipple is connected to the adapter by inserting the nipple into the adapter, engaging the locking member with the engaging portion, and preventing the axial movement of the nipple with the stopper. ,
After the stopper is removed, the nipple is pushed into the adapter, and the locking member is pushed and expanded by the separating sleeve that moves forward along therewith, thereby pushing the engaging member up onto the outer peripheral surface of the distal end portion of the separating sleeve. In the one-touch joint in which the engagement between the part and the lock member is released to enable the nipple to be separated from the adapter,
When the nipple is connected, the separation sleeve is configured to extend so that a rear side thereof is in a state of coming out of the adapter, and a flange portion is projected along a circumferential direction on the outer peripheral surface of the rear end portion of the separation sleeve, The stopper is configured to be detachably mounted on the outer peripheral side of the separation sleeve between the flange portion and the nipple connection side end surface of the adapter, and the stopper is constituted by a rubber ring that can be expanded and contracted, and the separation sleeve when mounted A one-touch joint configured to cover a contact end between the adapter and the adapter and a contact end between the separation sleeve and the nipple .

The one-touch joint according to claim 1 or 2, wherein the front end surface of the separating sleeve is formed as an inclined surface with the outer peripheral end side being the rear.

The one-touch joint according to claim 1, wherein the lock member is constituted by a C-shaped spring ring having a circular cross section.

The one-touch joint according to claim 1 , wherein the stopper is formed in a C shape.

6. The one-touch joint according to claim 5, wherein the stopper is made of an elastic body, and the stopper is bent so that the nipple can be constantly biased toward the nipple non-insertion side when being mounted.

The one-touch joint according to claim 2 , wherein an engagement groove that can engage with the lock member is formed on an outer peripheral surface of a distal end portion of the separation sleeve.

The one-touch coupling according to any one of claims 1 to 7, wherein the engaging portion is provided on the outer peripheral surface of the nipple so as to project annularly along the circumferential direction.

The annular groove extending along the circumferential direction is formed on the nipple connection side of the inner peripheral surface of the adapter, and the lock member is disposed in the annular groove so as to protrude from the annular groove. The one-touch coupling according to claim 1.

The annular groove is configured so that the lock member has a groove width that can move in the axial direction of the adapter, an inclined surface is formed on a nipple connecting side wall surface of the annular groove, the inclined surface, the engaging portion, The one-touch coupling according to claim 9, wherein the lock member can be locked between the two.

The engaging portion has an engaging inclined surface for locking the locking member on the nipple non-insertion side, and the locking member can be locked between the engaging inclined surface and the inclined surface of the annular groove. The one-touch coupling according to claim 10.