JP3427766B2 - Pipe fittings - Google Patents
Pipe fittingsInfo
- Publication number
- JP3427766B2 JP3427766B2 JP03365399A JP3365399A JP3427766B2 JP 3427766 B2 JP3427766 B2 JP 3427766B2 JP 03365399 A JP03365399 A JP 03365399A JP 3365399 A JP3365399 A JP 3365399A JP 3427766 B2 JP3427766 B2 JP 3427766B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- outer fitting
- fitting portion
- fastening ring
- connection
- 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
Links
Landscapes
- Joints That Cut Off Fluids, And Hose Joints (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、被接続管として給
水管などが接続される管継手に関する。
【０００２】
【従来の技術】従来の管継手として、例えば図９に示す
ものがある。このものは、一端側に第一接続部１を備
え、他端側には第二接続部２を備える。第一接続部１
は、雌ねじ部を有する他部材にねじ連結される雄ねじ部
を備える。第二接続部２は、被接続管に内嵌する内嵌部
２０と、外周に雄ねじが刻設されて被接続管に外嵌する
外嵌部２１とを備える。外嵌部２１には、外嵌部２１の
雄ねじに螺合する袋ナット３が螺着される。袋ナット３
は、袋ナットの締め付け状態に応じて拡縮するＣ字リン
グ３０を内方に保持する。
【０００３】上述の管継手は、袋ナット３の締緩によっ
てＣ字リング３０を拡縮させることにより、被接続管の
着脱を行うものであるが、次のような問題点がある。す
なわち、袋ナット３及び外嵌部２１によって被接続管の
挿入状態が隠れてしまい、確実に接続されたかどうかの
目視確認ができない。また、袋ナット３の締緩作業に手
間がかかるとともに、モンキーレンチなどの工具を使用
して接続作業を行なう際、作業スペースが狭いと工具を
軸回りに回転させることが非常に困難となる。更に、Ｃ
字リング３０による締め付けでは、被接続管の周面に加
わる力が不均一になって、極端な場合には被接続管が変
形してしまう恐れもある。
【０００４】また、従来の他の管継手として、特開平９
−２７３６８４号公報に示すようなものも存在する。こ
のものにあっては、締結リングを軸方向に摺動させるこ
とによって被接続管を接続するものであるので、モンキ
ーレンチなどの工具を軸回りに回転させることなく接続
作業を行なうことが可能で、作業スペースが狭くても被
接続管の接続作業ができるものの、この後者のものにあ
っても次のような問題点がある。
【０００５】すなわち、締結リングを被接続管に予め挿
着してからでないと被接続管の接続作業ができないので
手間がかかる。また、工具を使って締結リングを管継手
本体側に摺動する際に、締結リングが被接続管から外れ
てしまう恐れがある。更に、被接続管の接続状態を目視
確認するために確認孔を締結リングに設けてあるもの
の、被接続管が締結リングの規定挿入深さに達する部分
にのみ確認孔を設けてあるので、可視範囲が狭く、目視
確認し難い。
【０００６】
【発明が解決しようとする課題】すなわち、従来の管継
手にあっては、被接続管の接続固定作業にかなり広い作
業スペースを必要とするものであったり、被接続管が確
実に接続されたかどうかを目視確認できないものであっ
たり、被接続管の接続作業に手間のかかるものであった
り、被接続管が確実に接続されたかどうかを目視確認で
きるようにはなっていても、可視範囲が狭く目視確認し
難いものであったりするという問題点があった。
【０００７】本発明は上記の問題点を解決するためにな
されたもので、その目的とするところは、被接続管を良
好に接続することのできる、優れる管継手を提供するこ
とにある。
【０００８】
【課題を解決するための手段】本発明は上記の問題点を
解決するため、一端側に他部材と接続する第一接続部
を、他端側に被接続管が接続する第二接続部を備える略
筒状をなす管継手であって、第二接続部は、被接続管に
内嵌する内嵌部と被接続管に外嵌する外嵌部とを備えて
なり、第一接続部と第二接続部との中間部を基端とし
て、先端部が被接続管の周面に接離する方向に変位可能
なように外嵌部を延設するとともに、外嵌部の外周に保
持されて軸方向に摺動することにより外嵌部の先端部を
変位せしめる締結リングを設け、前記外嵌部の先端に傾
斜部を設けるとともに、締結リングの開口端内方に、前
記傾斜部を押圧して外嵌部を軸心から離れる方向に変位
させ得る押圧部を設けてある。
【０００９】また、前記外嵌部は、略円筒状をなし、被
接続管先端の当接位置を規定部として、略規定部から先
端まで連続する軸方向の複数のスリットと、規定部から
先端方向に所定長さ離れた位置に締結リングの摺動を止
める第一の位置決め部と、規定部から更に先端方向に所
定長さ離れた位置に締結リングの摺動を止める第二の位
置決め部とを備えることが好ましい。
【００１０】更に、前記外嵌部は、前記締結リングを前
記第一の位置決め部から第二の位置決め部の方向に摺動
すると、被接続管に接近する方向に変位することが好ま
しい。また更に、前記外嵌部は、被接続管の色と区別し
易い色にされていることが好ましい。
【００１１】
【発明の実施の形態】以下、本発明の基本的な構成を有
する管継手の参考例を図１および図２に基づいて、本発
明の一実施形態となる管継手を図３乃至図８に基づい
て、それぞれ詳細に説明する。
【００１２】［参考例］
図１は管継手を示す部分断面図、図２は管継手に被接続
管を接続した状態を示す部分断面図である。なお、ここ
でいう被接続管としては、例えばポリブデン管などの樹
脂製可撓管からなる、給水管などがある。
【００１３】この管継手は、図１または図２に示すよう
に略筒状をなし、一端側に他部材と接続する第一接続部
１を備え、他端側には被接続管Ａを接続する第二接続部
２を備える。第一接続部１は、ヘッダーなどの他部材に
設けられている雌ねじ部にねじ連結する雄ねじ部を、筒
状の外周に刻設されて備える。第二接続部２は、被接続
管Ａに内嵌する内嵌部２０と、被接続管Ａに外嵌する外
嵌部２１とを備える。外嵌部２１は、第一接続部１と第
二接続部２との中間部１２を基端として、先端部が被接
続管Ａの周面に接離する方向に変位可能なように延設さ
れる。また、外嵌部２１の外周には、軸方向に摺動する
ことで外嵌部２１の先端部を変位せしめる締結リング４
が設けられる。
【００１４】中間部１２は、工具を用いて第一接続部１
をヘッダーなどの他部材に接続することができるよう
に、工具にて把持し易い形状に形成される。また、中間
部１２の第二接続部２側の端部は、第二接続部２に挿入
される被接続管Ａの端面と当接して挿入深さを規定する
規定部１４になっている。
【００１５】内嵌部２０は、被接続管Ａの内径より小さ
い外径を有する筒状に形成される。外嵌部２１は中間部
１２に加締めて一体的に固定される。外嵌部２１は、筒
状の薄肉周壁に、軸方向のスリット２１ａを軸回方向に
所定間隔もって形成したものである。スリット２１ａ
は、外嵌部２１の基端部近傍から先端にわたって設けら
れる。これによって、外嵌部２１は、その先端部が被接
続管Ａの周面に接離する方向に変位可能となる。また、
スリット２１ａの基端側は、中間部１２の規定部１４ま
で略達しているので、スリット２１ａを通して被接続管
Ａの接続状態を容易に目視確認できる。更に、スリット
２１ａは軸回方向に所定間隔もって複数設けられている
ので、スリット２１ａを目視できる位置に調整するため
の手間を省くことができる。
【００１６】外嵌部２１は、第一の位置決め部に相当す
る位置決め溝２１ｂと、第二の位置決め部に相当する位
置決め溝２１ｃとを備える。位置決め溝２１ｂと位置決
め溝２１ｃとは、軸回方向に沿って且つ軸方向に所定間
隔を隔てて設けられる。被接続管Ａを接続しないとき
は、外嵌部２１の基端側にある位置決め溝２１ｂに締結
リング４を位置させる。そして、被接続管Ａを接続する
とき、締結リング４を軸方向に摺動させ、外嵌部２１の
先端側にある位置決め溝２１ｃに締結リング４を変位さ
せる。また、外嵌部２１の内面側には突部２１ｄが設け
られ、この突部２１ｄの被接続管Ａの挿入側はテーパ状
に形成される。
【００１７】つまり、締結リング４が位置決め溝２１ｂ
に位置する状態にて被接続管Ａを挿入することによっ
て、外嵌部２１は外方に押し広げられることになる。そ
して、締結リング４を位置決め溝２１ｃへ変位させるこ
とによって、外嵌部２１は内方に変位せしめられ、結果
として突部２１ｄが被接続管Ａの外周に食い込み、接続
がなされる。従って、締結リング４を軸方向に摺動させ
るだけで容易に被接続管Ａを管継手に接続することがで
き、モンキーレンチなどの工具を軸回り方向に回転させ
て接続する必要もないので、狭いスペースであっても容
易に接続作業を行うことができる。また、外嵌部２１の
圧力は、被接続管Ａの周面に均一にかかるので、被接続
管Ａの変形を防止することもできる。
【００１８】位置決め溝２１ｂと位置決め溝２１ｃとの
間の突壁部２１ｅは、位置決め溝２１ｂ側がテーパ状に
形成してある。従って、被接続管Ａの接続時に締結リン
グ４を滑らかに摺動させることができる。また、突壁部
２１ｅの位置決め溝２１ｃ側には段部が形成され、締結
リング４が容易には変位しないようにしてある。従っ
て、被接続管Ａの接続状態が安易に解除されてしまう可
能性を低減することができる。
【００１９】また、内嵌部２０には、外嵌部２１の突部
２１ｄに対応する位置に、密封性を確保するためのゴム
製のＯリング５を配設するための保持溝２０ａが軸回方
向に設けてあり、そこにＯリング５を配設してある。
【００２０】締結リング４は、所定幅を有する環状をな
し、その一端側には、外嵌部２１の位置決め溝２１ｂあ
るいは位置決め溝２１ｃに係合して位置決めされる、係
合部４ａを備える。この締結リング４には、外方への突
出部がないので、美観を損ねず、取扱い上も邪魔になる
ことがない。
【００２１】この管継手に被接続管Ａを接続する際の手
順としては、まず、締結リング４が位置決め溝２１ｂの
位置にある状態で、被接続管Ａを内嵌部２０と外嵌部２
１との間に挿入し、被接続管Ａの先端が規定部１４に到
達するまで差し込む。そして、締結リング４を位置決め
溝２１ｃまで軸方向に摺動させれば接続作業は完了す
る。このように、上述の管継手にあっては、簡単且つ容
易に被接続管Ａを接続できる。また、接続作業中あるい
は接続完了後に、スリット２１ａを透かして被接続管Ａ
の挿入状態を容易に目視確認することが可能で、被接続
管Ａの先端が規定部１４に達していない不完全接続など
の接続不良を簡単に見つけ出すことができ、接続し直す
などの処置を施すことによって接続不良によるトラブル
を低減することができる。
【００２２】逆に、被接続管Ａの接続状態を解除するに
は、接続時とは逆方向に締結リング４を摺動させればよ
い。なお、被接続管Ａの堅固な接続状態よりも、着脱の
容易性を重視するのであれば、段部に代えてテーパ状に
形成することによって、容易に解除できるようにするこ
とも可能である。
【００２３】［実施形態］
図３は管継手を示す部分断面図、図４は管継手の第一接
続部に他部材を接続した状態を示す部分断面図、図５は
管継手の第二接続部に被接続管を挿入した状態を示す部
分断面図、図６は管継手の第二接続部に被接続管を挿入
して工具を取着した状態を示す部分断面図、図７は管継
手の締結リングを工具にて摺動せしめて第二接続部に被
接続管を接続した状態を示す部分断面図、図８は管継手
の第二接続部に被接続管を接続した状態を示す部分断面
図である。
【００２４】この管継手は、略筒状をなし、一端側に他
部材Ｂと接続する第一接続部１を備え、他端側に被接続
管Ａを接続する第二接続部２を備える。第一接続部１
は、ヘッダーなどの他部材Ｂに設けられた雌ねじ部にね
じ連結できるように、筒状の外周に雄ねじを刻設して形
成される。第二接続部２は、被接続管Ａに内嵌する内嵌
部２０と、被接続管Ａに外嵌する外嵌部２１とを備え
る。外嵌部２１は、第一接続部１と第二接続部２との中
間部１２を基端として、先端部が被接続管Ａの周面に接
離する方向に変位可能なように延設される。また、外嵌
部２１の外周には、軸方向に摺動することにより外嵌部
２１の先端部を変位せしめる、締結リング４が設けられ
る。
【００２５】中間部１２は、工具で第一接続部１を他部
材Ｂに接続できるように、工具で把持し易い形状に形成
されるとともに、第二接続部２に被接続管Ａを接続する
場合に工具で把持し易いように、工具取着溝１２ａを軸
回方向に備える。また、中間部１２の第二接続部２側の
端部は、第二接続部２に挿入される被接続管Ａの端面に
当接して挿入深さを規定する規定部１４になっている。
【００２６】内嵌部２０は、被接続管Ａの内径より小さ
い外径を有する筒状に形成される。外嵌部２１は中間部
１２に加締めて一体的に固定される。外嵌部２１は、筒
状の薄肉周壁に、軸方向のスリット２１ａを軸回方向に
所定間隔もって形成したものである。スリット２１ａは
外嵌部２１の基端部近傍から先端にわたって設けられ
る。これにより、外嵌部２１は、その先端部が被接続管
Ａの周面に接離する方向に変位可能となる。また、スリ
ット２１ａの基端側は規定部１４まで略達しているとと
もに、外嵌部２１は被接続管Ａの色と区別し易く且つ被
接続管Ａが目立つような例えば黒色系にされる。従っ
て、スリット２１ａを通して被接続管Ａの接続状態を容
易に目視確認できる。更に、スリット２１ａは軸回方向
に所定間隔もって複数設けられているので、スリット２
１ａを目視できる位置に調整するための手間を省くこと
ができる。
【００２７】外嵌部２１は、第一の位置決め部に相当す
る位置決め溝２１ｂと、第二の位置決め部に相当する位
置決め溝２１ｃとを備える。位置決め溝２１ｂと位置決
め溝２１ｃとは、軸回方向に沿って且つ軸方向に所定間
隔を隔てて設けられる。被接続管Ａを接続しないとき
は、外嵌部２１の基端側にある位置決め溝２１ｂに締結
リング４を位置させる。そして、被接続管Ａを接続する
とき、締結リング４を軸方向に摺動させ、外嵌部２１の
先端側にある位置決め溝２１ｃに締結リング４を変位さ
せる。また、外嵌部２１の内面側には突部２１ｄが設け
られ、この突部２１ｄの被接続管Ａの挿入側はテーパ状
に形成される。また、外嵌部２１の先端には、傾斜部２
１ｆが設けられている。
【００２８】つまり、締結リング４が位置決め溝２１ｂ
に位置する状態にて被接続管Ａを挿入することによっ
て、外嵌部２１は外方に押し広げられることになる。そ
して、締結リング４を位置決め溝２１ｃへ変位させるこ
とによって、外嵌部２１は内方に変位せしめられ、結果
として突部２１ｄが被接続管Ａの外周に食い込み、接続
がなされる。従って、締結リング４を軸方向に摺動させ
るだけで容易に被接続管Ａを管継手に接続することがで
き、モンキーレンチなどの工具を軸回り方向に回転させ
て接続する必要もないので、狭いスペースであっても容
易に接続作業を行うことができる。また、外嵌部２１の
圧力は、被接続管Ａの周面に均一にかかるので、被接続
管Ａの変形を防止することもできる。
【００２９】また、位置決め溝２１ｂと位置決め溝２１
ｃとの間の突壁部１２にあっては、位置決め溝２１ｂ側
と位置決め溝２１ｃ側とがそれぞれテーパ状に形成して
ある。従って、被接続管Ａの接続時に締結リング４を滑
らかに摺動させることができるとともに、被接続管Ａの
取り外し時にも締結リング４を滑らかに摺動させること
ができる。
【００３０】なお、被接続管Ａの着脱容易性よりも、被
接続管Ａの接続状態が安易に解除されてしまうことない
堅固な接続状態を重視するのであれば、突壁部１２の位
置決め溝２１ｃ側を段部に形成するようにして、締結リ
ング４が容易には変位しないようにすることもできる。
【００３１】内嵌部２０には、外嵌部２１の突部２１ｄ
に対応する位置に、密封性を確保するためのゴム製のＯ
リング５ａを配設するための保持溝２０ａが軸回方向に
設けてあり、そこにＯリング５ａを配設してある。ま
た、密封性を確実にするために、保持溝２０ａの更なる
奥に、密封性を確保するためのゴム製のＯリング５ｂを
配設するための保持溝２０ｂが軸回方向に設けてあり、
そこにＯリング５ｂを配設してある。
【００３２】締結リング４は、所定幅を有する環状をな
し、その一端側には、内方に突出して外嵌部２１の位置
決め溝２１ｂまたは位置決め溝２１ｃに係合して位置決
めされる、係合部４ａを備える。また、締結リング４
は、係合部４ａの形成された位置に対応する外周に、工
具で把持する工具取着溝４ｂを軸回方向に備える。更
に、締結リング４は、開口端内方に、傾斜部２１ｆを押
圧して外嵌部２１を軸心から離れる方向に変位せしめる
押圧部４ｃを備える。従って、押圧部４ｃが傾斜部２１
ｆを押圧するように締結リング４を押圧することによっ
て、外嵌部２１を軸心から離れる方向に変位できる。
【００３３】図３に示す管継手に被接続管Ａを接続する
際の手順としては、先ず、ヘッダーなどの他部材Ｂに設
けられた雌ねじ部に、管継手の第一接続部１である雄ね
じをねじ連結して図４に示す状態にする。次に、管継手
の第二接続部２に被接続管Ａを接続するのであるが、締
結リング４の係合部４ａが位置決め溝２１ｂに位置する
状態で、内嵌部２０と外嵌部２１との間に被接続管Ａを
挿入し、被接続管Ａの先端が規定部１４に到達するまで
差し込んで、図５に示す状態にする。このとき、押圧部
４ｃが傾斜部２１ｆを押圧するように締結リング４を中
間部１２の方向へ押圧することによって、外嵌部２１を
軸心から離れる方向に変位せしめて、内嵌部２０と外嵌
部２１との間に被接続管Ａを滑らかに差し込むことがで
きる。
【００３４】その後、図５に示す状態を保ちながら、工
具の一方の把持片Ｄ1 を工具取着溝１２ａに、工具の他
方の把持片Ｄ2 を工具取着溝４ｂにそれぞれ嵌入して、
図６に示す状態にする。それから、工具を操作して把持
片Ｄ1,Ｄ2 の間隔を押し広げる。すると、締結リング４
の係合部４ａは、位置決め溝２１ｂ側の方から突壁部１
２を越えて位置決め溝２１ｃに達し、外嵌部２１は内方
に変位せしめられ、結果として突部２１ｄが被接続管Ａ
の外周に食い込み、第二接続部２への被接続管Ａの接続
がなされて図７に示す状態になるとともに、被接続管Ａ
の内面はＯリング５ａ，５ｂに押し付けられて密封状態
にされる。
【００３５】その後、把持片Ｄ1 を工具取着溝１２ａか
ら取り外すとともに把持片Ｄ2 を工具取着溝４ｂから取
り外すと、第二接続部２への被接続管Ａの接続が完了し
て図８に示す状態になる。このように、締結リング４を
軸方向に摺動させて、係合部４ａを位置決め溝２１ｃに
移動させればよいので、簡単かつ容易に被接続管Ａを第
二接続部２に接続させることができる。
【００３６】また、接続作業中あるいは接続完了後に、
スリット２１ａを透かして被接続管Ａの挿入状態を容易
に目視確認できるので、被接続管Ａの先端が規定部１４
に達していない不完全接続などの接続不良を簡単に見つ
け出すことができ、接続し直すなどの処置を施すことに
よって、接続不良によるトラブルを低減することができ
る。
【００３７】逆に、被接続管Ａの接続状態を解除するに
は、接続時とは逆方向に締結リング４を摺動させればよ
い。このとき、押圧部４ｃが傾斜部２１ｆを押圧するよ
うに締結リング４を中間部１２の方向へ押圧することに
よって、押圧部４ｃが傾斜部２１ｆを押圧して外嵌部２
１を軸心から離れる方向に変位できるので、内嵌部２０
と外嵌部２１との間から被接続管Ａを滑らかに引き抜く
ことができる。
【００３８】なお、被接続管Ａの着脱の容易性よりも、
堅固な接続状態を重視するのであれば、突壁部１２の位
置決め溝２１ｃ側をテーパ状に代えて段部に形成するこ
とによって容易に解決することができる。
【００３９】
【発明の効果】請求項１記載の発明によれば、従来のよ
うにモンキーレンチなどの工具を軸回りに回転させるこ
となく、締結リングを軸方向に摺動するのみで被接続管
との接続作業を行うことができるので、狭い作業スペー
スでも接続作業が素早く可能な、優れる管継手を提供で
きるという効果を奏する。
【００４０】更に、請求項１記載の発明によれば、締結
リングを押圧しながら被接続管を挿入することによって
挿入力を低減することができ、また、締結リングを押圧
しながら被接続管を引き抜くことによって引き抜き力を
低減することのできる、優れる管継手を提供できるとい
う効果を奏する。
【００４１】
【００４２】
【００４３】Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint to which a water supply pipe or the like is connected as a connected pipe. 2. Description of the Related Art FIG. 9 shows a conventional pipe joint, for example. This device includes a first connection portion 1 on one end side and a second connection portion 2 on the other end side. First connection part 1
Includes a male screw portion that is screwed to another member having a female screw portion. The second connecting portion 2 includes an inner fitting portion 20 that fits inside the connected pipe, and an outer fitting portion 21 that has an external thread engraved on the outer circumference and fits outside the connected pipe. The cap nut 3 screwed to the external thread of the outer fitting part 21 is screwed to the outer fitting part 21. Cap nut 3
Holds the C-shaped ring 30 that expands and contracts in accordance with the tightening state of the cap nut inward. In the above-mentioned pipe joint, the connected pipe is attached and detached by expanding and contracting the C-shaped ring 30 by tightening and loosening the cap nut 3, but has the following problems. That is, the inserted state of the connected pipe is hidden by the cap nut 3 and the outer fitting portion 21, and it cannot be visually confirmed whether or not the connection has been securely made. In addition, the work of tightening and loosening the cap nut 3 is troublesome, and when the connection work is performed using a tool such as a monkey wrench, it is very difficult to rotate the tool around the axis if the work space is small. Further, C
In the case of the fastening by the character ring 30, the force applied to the peripheral surface of the connected pipe becomes uneven, and in an extreme case, the connected pipe may be deformed. Another conventional pipe joint is disclosed in Japanese Unexamined Patent Publication No.
There is also one as disclosed in Japanese Unexamined Patent Publication No. -273684. In this case, since the connection pipe is connected by sliding the fastening ring in the axial direction, the connection work can be performed without rotating a tool such as a monkey wrench around the axis. Although the connecting pipe can be connected even if the working space is small, the latter has the following problems. That is, connection work of the connected pipes cannot be performed until the fastening ring is inserted into the connected pipes in advance, which is troublesome. Further, when the fastening ring is slid toward the pipe joint main body side by using a tool, the fastening ring may be detached from the connected pipe. Further, although a confirmation hole is provided in the fastening ring to visually confirm the connection state of the connected pipe, the confirmation hole is provided only in a portion where the connected pipe reaches a specified insertion depth of the fastening ring, so that it is visible. The range is narrow, making it difficult to confirm visually. That is, in the conventional pipe joint, a considerably large work space is required for the operation of connecting and fixing the pipe to be connected, or the pipe to be connected is surely connected. Even if it is not possible to visually check whether or not it is connected, it is troublesome to connect the connected pipe, or even if it is possible to visually check whether the connected pipe is securely connected, There is a problem that the visible range is narrow and it is difficult to visually confirm. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an excellent pipe joint capable of satisfactorily connecting a connected pipe. In order to solve the above-mentioned problems, the present invention solves the above-mentioned problems by providing a first connecting portion connected to another member on one end and a second connected tube connected to the other end on the other end. A pipe joint having a substantially cylindrical shape including a connection portion, wherein the second connection portion includes an inner fitting portion internally fitted to the connected tube and an outer fitting portion externally fitted to the connected tube, and With an intermediate portion between the connecting portion and the second connecting portion as a base end, an outer fitting portion is extended so that a distal end portion can be displaced in a direction in which the tip portion comes into contact with or separate from the peripheral surface of the connected pipe, and an outer periphery of the outer fitting portion is provided. the fastening ring allowed to displace the tip portion of the outer fitting portion is provided by sliding held axially, tilting the front end of the outer fitting portion
A bevel is provided, and the inside of the opening end of the fastening ring is
Press the inclined part to displace the outer fitting part away from the axis
There is provided a pressing portion that can be pressed . The outer fitting portion has a substantially cylindrical shape, and a plurality of slits extending in an axial direction substantially extending from the substantially defined portion to the distal end, with the contact position of the distal end of the connected pipe being a defined portion, A first positioning portion that stops sliding of the fastening ring at a position separated by a predetermined length in the direction, and a second positioning portion that stops sliding of the fastening ring at a position further away from the defining portion by a predetermined length in the distal direction. It is preferable to provide Further, it is preferable that the outer fitting portion is displaced in a direction approaching the connected pipe when the fastening ring is slid from the first positioning portion to the second positioning portion. Further, it is preferable that the outer fitting portion is colored in a color that is easily distinguishable from the color of the connected pipe . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The basic structure of the present invention will be described below.
A reference example of a pipe fitting to be developed based on FIG. 1 and FIG.
A pipe joint according to an embodiment will be described in detail with reference to FIGS. Reference Example FIG. 1 is a partial cross-sectional view showing a pipe joint, and FIG. 2 is a partial cross-sectional view showing a state where a pipe to be connected is connected to the pipe joint. The pipe to be connected here includes, for example, a water supply pipe made of a flexible resin pipe such as a polybutene pipe. As shown in FIG. 1 or FIG. 2, this pipe joint has a substantially cylindrical shape, and has a first connecting portion 1 connected to another member at one end, and a connected pipe A connected to the other end. And a second connecting portion 2 to be connected. The first connection portion 1 includes a male screw portion that is screw-connected to a female screw portion provided on another member such as a header, and is provided on the outer periphery of the cylindrical shape. The second connection part 2 includes an inner fitting part 20 that fits inside the connected pipe A, and an outer fitting part 21 that fits outside the connected pipe A. The outer fitting portion 21 extends from the intermediate portion 12 between the first connecting portion 1 and the second connecting portion 2 so that the distal end portion can be displaced in a direction in which the distal end portion comes into contact with or separates from the peripheral surface of the connected pipe A. Is done. A fastening ring 4 is provided on the outer periphery of the outer fitting portion 21 to displace the distal end portion of the outer fitting portion 21 by sliding in the axial direction.
Is provided. The intermediate portion 12 is formed by using a tool to connect the first connecting portion 1 to the first connecting portion 1.
Is formed in a shape that can be easily gripped by a tool so that it can be connected to another member such as a header. The end of the intermediate portion 12 on the second connecting portion 2 side is a defining portion 14 that abuts on the end face of the connected pipe A inserted into the second connecting portion 2 to define the insertion depth. The inner fitting portion 20 is formed in a cylindrical shape having an outer diameter smaller than the inner diameter of the connected pipe A. The outer fitting portion 21 is swaged to the intermediate portion 12 and integrally fixed. The outer fitting portion 21 is formed by forming slits 21a in the axial direction at predetermined intervals in the axial direction on the cylindrical thin peripheral wall. Slit 21a
Is provided from the vicinity of the base end of the outer fitting portion 21 to the tip thereof. Accordingly, the outer fitting portion 21 can be displaced in a direction in which a tip portion thereof comes into contact with or separates from the peripheral surface of the connected pipe A. Also,
Since the base end side of the slit 21a substantially reaches the defining portion 14 of the intermediate portion 12, the connection state of the connected pipe A can be easily visually confirmed through the slit 21a. Further, since a plurality of slits 21a are provided at predetermined intervals in the axial rotation direction, it is possible to save time and effort for adjusting the slits 21a to a position where they can be viewed. The outer fitting portion 21 has a positioning groove 21b corresponding to a first positioning portion and a positioning groove 21c corresponding to a second positioning portion. The positioning groove 21b and the positioning groove 21c are provided along the rotation direction and at predetermined intervals in the axial direction. When the connected pipe A is not connected, the fastening ring 4 is positioned in the positioning groove 21b on the base end side of the outer fitting portion 21. Then, when connecting the connected pipe A, the fastening ring 4 is slid in the axial direction, and the fastening ring 4 is displaced into the positioning groove 21 c on the distal end side of the outer fitting portion 21. Further, a protrusion 21d is provided on the inner surface side of the outer fitting portion 21, and the insertion side of the connected portion A of the protrusion 21d is formed in a tapered shape. That is, the fastening ring 4 is positioned in the positioning groove 21b.
When the connected pipe A is inserted in the state of being located at the position, the external fitting portion 21 is pushed outward. Then, by displacing the fastening ring 4 into the positioning groove 21c, the outer fitting portion 21 is displaced inward, and as a result, the protrusion 21d bites into the outer periphery of the connected pipe A, and connection is made. Therefore, the pipe A to be connected can be easily connected to the pipe joint simply by sliding the fastening ring 4 in the axial direction, and there is no need to rotate and connect a tool such as a monkey wrench around the axis. Connection work can be easily performed even in a narrow space. Further, since the pressure of the external fitting portion 21 is uniformly applied to the peripheral surface of the connected pipe A, the deformation of the connected pipe A can be prevented. The protruding wall portion 21e between the positioning groove 21b and the positioning groove 21c has a tapered shape on the positioning groove 21b side. Therefore, when connecting the connection pipe A, the fastening ring 4 can be slid smoothly. A step is formed on the positioning groove 21c side of the protruding wall 21e so that the fastening ring 4 is not easily displaced. Therefore, the possibility that the connection state of the connected pipe A is easily released can be reduced. The inner fitting portion 20 is provided with a holding groove 20a for disposing a rubber O-ring 5 at a position corresponding to the protrusion 21d of the outer fitting portion 21 for ensuring sealing. The O-ring 5 is provided in the turning direction. The fastening ring 4 has an annular shape having a predetermined width, and has, at one end thereof, an engaging portion 4a which is positioned by engaging with the positioning groove 21b or the positioning groove 21c of the outer fitting portion 21. Since the fastening ring 4 does not have an outwardly protruding portion, it does not impair the appearance and does not hinder the handling. The procedure for connecting the pipe A to the pipe joint is as follows. First, the pipe A is connected to the inner fitting portion 20 and the outer fitting portion 2 with the fastening ring 4 at the position of the positioning groove 21b.
1 and is inserted until the distal end of the connected pipe A reaches the defining portion 14. Then, the connection work is completed by sliding the fastening ring 4 in the axial direction to the positioning groove 21c. Thus, in the above-described pipe joint, the connected pipe A can be connected easily and easily. During the connection operation or after the connection is completed, the connection pipe A is cut through the slit 21a.
It is possible to easily visually confirm the insertion state of the pipe, and to easily find a connection failure such as an incomplete connection in which the distal end of the connected pipe A does not reach the defining section 14, and take measures such as reconnecting. By doing so, troubles due to poor connection can be reduced. Conversely, in order to release the connection state of the connected pipe A, the fastening ring 4 may be slid in the direction opposite to the direction at the time of connection. If the ease of attachment and detachment is more important than the solid connection state of the connected pipe A, it can be easily released by forming a tapered shape instead of the stepped portion. . Embodiment FIG. 3 is a partial sectional view showing a pipe joint, FIG. 4 is a partial sectional view showing a state where another member is connected to a first connection portion of the pipe joint, and FIG. 5 is a second connection of the pipe joint. FIG. 6 is a partial cross-sectional view showing a state where a connected pipe is inserted into a portion of the pipe joint, FIG. 6 is a partial cross-sectional view showing a state where a connected pipe is inserted into a second connection part of the pipe joint and a tool is attached, and FIG. FIG. 8 is a partial cross-sectional view showing a state where the connection pipe is connected to the second connection part by sliding the fastening ring of FIG. It is sectional drawing. This pipe joint has a substantially cylindrical shape, and has a first connecting portion 1 connected to another member B at one end and a second connecting portion 2 connected to the connected pipe A at the other end. First connection part 1
Is formed by engraving a male screw on the outer periphery of a cylindrical shape so that it can be screw-coupled to a female screw portion provided on another member B such as a header. The second connection part 2 includes an inner fitting part 20 that fits inside the connected pipe A, and an outer fitting part 21 that fits outside the connected pipe A. The outer fitting portion 21 extends from the intermediate portion 12 between the first connecting portion 1 and the second connecting portion 2 so that the distal end portion can be displaced in a direction in which the distal end portion comes into contact with or separates from the peripheral surface of the connected pipe A. Is done. A fastening ring 4 is provided on the outer periphery of the outer fitting portion 21 to displace the tip end of the outer fitting portion 21 by sliding in the axial direction. The intermediate portion 12 is formed in a shape that can be easily gripped by a tool so that the first connection portion 1 can be connected to another member B by a tool, and connects the pipe A to be connected to the second connection portion 2. In this case, a tool mounting groove 12a is provided in the axial direction so as to be easily gripped by a tool. The end of the intermediate portion 12 on the side of the second connecting portion 2 is a defining portion 14 that abuts on the end face of the connected pipe A inserted into the second connecting portion 2 to define the insertion depth. The inner fitting portion 20 is formed in a tubular shape having an outer diameter smaller than the inner diameter of the connected pipe A. The outer fitting portion 21 is swaged to the intermediate portion 12 and integrally fixed. The outer fitting portion 21 is formed by forming slits 21a in the axial direction at predetermined intervals in the axial direction on the cylindrical thin peripheral wall. The slit 21a is provided from near the base end of the outer fitting portion 21 to the tip. Thus, the outer fitting portion 21 can be displaced in a direction in which a tip portion thereof comes into contact with or separates from the peripheral surface of the connected pipe A. In addition, the base end side of the slit 21a substantially reaches the defining portion 14, and the outer fitting portion 21 is made of, for example, black so that the color of the connected pipe A can be easily distinguished from the color of the connected pipe A. Therefore, the connection state of the connected pipe A can be easily visually confirmed through the slit 21a. Further, since a plurality of slits 21a are provided at predetermined intervals in the axial rotation direction,
The labor for adjusting 1a to a position where it can be visually recognized can be omitted. The outer fitting portion 21 has a positioning groove 21b corresponding to a first positioning portion and a positioning groove 21c corresponding to a second positioning portion. The positioning groove 21b and the positioning groove 21c are provided along the rotation direction and at predetermined intervals in the axial direction. When the connected pipe A is not connected, the fastening ring 4 is positioned in the positioning groove 21b on the base end side of the outer fitting portion 21. Then, when connecting the connected pipe A, the fastening ring 4 is slid in the axial direction, and the fastening ring 4 is displaced into the positioning groove 21 c on the distal end side of the outer fitting portion 21. Further, a protrusion 21d is provided on the inner surface side of the outer fitting portion 21, and the insertion side of the connected portion A of the protrusion 21d is formed in a tapered shape. In addition, the inclined portion 2 is provided at the tip of the outer fitting portion 21.
1f is provided. That is, the fastening ring 4 is moved to the positioning groove 21b.
When the connected pipe A is inserted in the state of being located at the position, the external fitting portion 21 is pushed outward. Then, by displacing the fastening ring 4 into the positioning groove 21c, the outer fitting portion 21 is displaced inward, and as a result, the protrusion 21d bites into the outer periphery of the connected pipe A, and connection is made. Therefore, the pipe A to be connected can be easily connected to the pipe joint simply by sliding the fastening ring 4 in the axial direction, and there is no need to rotate and connect a tool such as a monkey wrench around the axis. Connection work can be easily performed even in a narrow space. Further, since the pressure of the external fitting portion 21 is uniformly applied to the peripheral surface of the connected pipe A, the deformation of the connected pipe A can be prevented. The positioning groove 21b and the positioning groove 21
c, the positioning groove 21b side and the positioning groove 21c side are formed in a tapered shape, respectively. Therefore, the fastening ring 4 can be smoothly slid when the connected pipe A is connected, and the fastening ring 4 can be smoothly slid when the connected pipe A is removed. It is to be noted that if the connection state of the connected pipe A is more important than the easy connection and detachment of the connected pipe A, the connection groove of the protruding wall portion 12 should be emphasized. By forming the 21c side in the step portion, the fastening ring 4 can be prevented from being easily displaced. The inner fitting portion 20 has a protrusion 21 d of the outer fitting portion 21.
Rubber O to secure sealing
A holding groove 20a for disposing the ring 5a is provided in the axial direction, and the O-ring 5a is disposed therein. Further, in order to ensure the sealing performance, a holding groove 20b for disposing a rubber O-ring 5b for securing the sealing performance is provided further in the holding groove 20a in the axial direction. ,
The O-ring 5b is provided there. The fastening ring 4 has an annular shape having a predetermined width. One end of the fastening ring 4 projects inward and engages with the positioning groove 21b or the positioning groove 21c of the outer fitting portion 21 to be positioned. A part 4a is provided. In addition, the fastening ring 4
Is provided with a tool mounting groove 4b to be gripped by a tool on the outer periphery corresponding to the position where the engaging portion 4a is formed in the axial rotation direction. Further, the fastening ring 4 includes a pressing portion 4c that presses the inclined portion 21f to displace the outer fitting portion 21 in a direction away from the axis, inside the opening end. Therefore, the pressing portion 4c is moved to the inclined portion 21.
By pressing the fastening ring 4 so as to press f, the outer fitting portion 21 can be displaced in a direction away from the axis. The procedure for connecting the pipe A to be connected to the pipe joint shown in FIG. 3 is as follows. First, a female screw section provided on another member B such as a header is provided with a male thread as the first connection section 1 of the pipe joint. Is connected by screws to the state shown in FIG. Next, the pipe A to be connected is connected to the second connection part 2 of the pipe joint. In a state where the engagement part 4a of the fastening ring 4 is located in the positioning groove 21b, the inner fitting part 20 and the outer fitting part 21 are connected. And the connected pipe A is inserted until the distal end of the connected pipe A reaches the defining portion 14 to obtain the state shown in FIG. At this time, by pressing the fastening ring 4 toward the intermediate portion 12 so that the pressing portion 4c presses the inclined portion 21f, the outer fitting portion 21 is displaced in a direction away from the axis, and the inner fitting portion 20 and the inner fitting portion 20 are displaced. The connected pipe A can be smoothly inserted between the outer fitting portion 21 and the outer fitting portion 21. [0034] Then, while maintaining the state shown in FIG. 5, one of the gripping piece D 1 of the tool to the tool attachment groove 12a, and respectively inserted the other gripping piece D 2 of the tool into the tool attachment groove 4b,
The state shown in FIG. Then push the spacing of the gripping piece D 1, D 2 by operating the tool. Then, the fastening ring 4
Of the projecting wall portion 1 from the positioning groove 21b side.
2 to reach the positioning groove 21c, the outer fitting portion 21 is displaced inward, and as a result, the projection 21d
And the connected pipe A is connected to the second connecting portion 2 to be in the state shown in FIG.
Are pressed against the O-rings 5a and 5b to be sealed. [0035] Thereafter, by removing the gripping piece D 1 the gripping piece D 2 together with the removal from the tool attachment groove 12a from the tool attachment groove 4b, FIG connection is completed of the connecting pipe A to the second connecting portion 2 The state shown in FIG. As described above, since the fastening ring 4 is slid in the axial direction to move the engagement portion 4a to the positioning groove 21c, the connected pipe A can be easily and easily connected to the second connection portion 2. Can be. During the connection work or after the connection is completed,
Since the insertion state of the connected pipe A can be easily visually confirmed through the slit 21a, the tip of the connected pipe A
Connection failures such as incomplete connections that have not yet reached the limit can be easily found, and by taking measures such as reconnection, troubles due to connection failures can be reduced. Conversely, to release the connected state of the connected pipe A, the fastening ring 4 may be slid in the direction opposite to the direction at the time of connection. At this time, by pressing the fastening ring 4 in the direction of the intermediate portion 12 so that the pressing portion 4c presses the inclined portion 21f, the pressing portion 4c presses the inclined portion 21f to press the outer fitting portion 2f.
1 can be displaced away from the axis, so that the inner fitting portion 20 can be displaced.
The connected pipe A can be smoothly pulled out from between the outer fitting part 21 and the outer fitting part 21. It should be noted that rather than the ease with which the connected pipe A can be attached and detached,
If a strong connection state is emphasized, the problem can be easily solved by forming the positioning groove 21c side of the protruding wall portion 12 in a stepped portion instead of a tapered shape. According to the first aspect of the present invention, a pipe to be connected is connected only by sliding the fastening ring in the axial direction without rotating a tool such as a monkey wrench around the axis as in the prior art. Since the connection work can be performed with the connection pipe, it is possible to provide an excellent pipe joint that can quickly perform the connection work even in a narrow work space. Further, according to the first aspect of the present invention, the fastening
By inserting the connected pipe while pressing the ring
Insertion force can be reduced and also presses the fastening ring
While pulling out the connected pipe
It is effective in providing an excellent pipe joint which can be reduced . ## EQU1 ##
【図面の簡単な説明】
【図１】本発明の基本的な構成を有する管継手の参考例
を示す部分断面図である。
【図２】上記管継手に被接続管を接続した状態を示す部
分断面図である。
【図３】本発明の一実施形態となる管継手を示す部分断
面図である。
【図４】上記管継手の第一接続部に他部材を接続した状
態を示す部分断面図である。
【図５】上記管継手の第二接続部に被接続管を挿入した
状態を示す部分断面図である。
【図６】上記管継手の第二接続部に被接続管を挿入して
工具を取着した状態を示す部分断面図である。
【図７】上記管継手の締結リングを工具にて摺動せしめ
て第二接続部に被接続管を接続した状態を示す部分断面
図である。
【図８】上記管継手の第二接続部に被接続管を接続した
状態を示す部分断面図である。
【図９】従来の管継手を示す部分断面図である。
【符号の説明】
１ 第一接続部
１２ 中間部
１４ 規定部
２ 第二接続部
２０ 内嵌部
２１ 外嵌部
２１ａ スリット
２１ｂ 第一の位置決め部
２１ｃ 第二の位置決め部
２１ｆ 傾斜部
４ 締結リング
４ｃ 押圧部
Ａ 被接続管
Ｂ 他部材BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial sectional view showing a reference example of a pipe joint having a basic configuration of the present invention. FIG. 2 is a partial cross-sectional view showing a state where a connected pipe is connected to the pipe joint. FIG. 3 is a partial sectional view showing a pipe joint according to an embodiment of the present invention. FIG. 4 is a partial cross-sectional view showing a state where another member is connected to a first connection portion of the pipe joint. FIG. 5 is a partial cross-sectional view showing a state where a connected pipe is inserted into a second connecting portion of the pipe joint. FIG. 6 is a partial cross-sectional view showing a state where a connected pipe is inserted into a second connection portion of the pipe joint and a tool is attached. FIG. 7 is a partial cross-sectional view showing a state where a connection pipe is connected to a second connection portion by sliding a fastening ring of the pipe joint with a tool. FIG. 8 is a partial cross-sectional view showing a state where a connected pipe is connected to a second connection portion of the pipe joint. FIG. 9 is a partial sectional view showing a conventional pipe joint. [Description of Signs] 1 First connecting portion 12 Intermediate portion 14 Defining portion 2 Second connecting portion 20 Inner fitting portion 21 Outer fitting portion 21a Slit 21b First positioning portion 21c Second positioning portion 21f Inclined portion 4 Fastening ring 4c Pressing part A Connected pipe B Other members
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F16L 37/04 F16L 33/22 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) F16L 37/04 F16L 33/22
Claims (1)
を、他端側に被接続管が接続する第二接続部を備える略
筒状をなす管継手であって、第二接続部は、被接続管に
内嵌する内嵌部と被接続管に外嵌する外嵌部とを備えて
なり、第一接続部と第二接続部との中間部を基端とし
て、先端部が被接続管の周面に接離する方向に変位可能
なように外嵌部を延設するとともに、外嵌部の外周に保
持されて軸方向に摺動することにより外嵌部の先端部を
変位せしめる締結リングを設け、前記外嵌部の先端に傾
斜部を設けるとともに、締結リングの開口端内方に、前
記傾斜部を押圧して外嵌部を軸心から離れる方向に変位
させ得る押圧部を設けたことを特徴とする管継手。(57) [Claim 1] A substantially cylindrical pipe having a first connecting part connected to another member at one end and a second connecting part connected to a connected pipe at the other end. A joint, wherein the second connecting portion includes an inner fitting portion internally fitted to the connected pipe and an outer fitting portion externally fitting to the connected pipe, and is provided between the first connecting portion and the second connecting portion. With the part as the base end, the outer fitting part is extended so that the tip part can be displaced in the direction of coming into contact with and separating from the peripheral surface of the connected pipe, and is held on the outer periphery of the outer fitting part and slides in the axial direction. the fastening ring allowed to displace the tip portion of the outer fitting portion is provided by, with the previous Kigai fitting portion of the tip to provide an inclined portion, the inner opening end of the fastening ring, the outer fitting portion to press the inclined portion pipe joint you characterized in that a pressing part which can be displaced in the axial center away direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03365399A JP3427766B2 (en) | 1998-02-17 | 1999-02-12 | Pipe fittings |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10-35282 | 1998-02-17 | ||
| JP3528298 | 1998-02-17 | ||
| JP03365399A JP3427766B2 (en) | 1998-02-17 | 1999-02-12 | Pipe fittings |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002220917A Division JP3680823B2 (en) | 1998-02-17 | 2002-07-30 | Pipe fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11315983A JPH11315983A (en) | 1999-11-16 |
| JP3427766B2 true JP3427766B2 (en) | 2003-07-22 |
Family
ID=26372381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03365399A Expired - Fee Related JP3427766B2 (en) | 1998-02-17 | 1999-02-12 | Pipe fittings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3427766B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009257358A (en) * | 2008-04-12 | 2009-11-05 | Mirai Ind Co Ltd | Connecting hardware of water flow pipe |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100423112B1 (en) * | 2001-07-06 | 2004-03-16 | 최수봉 | Needle unit used in insulin pump |
| JP2005155828A (en) * | 2003-11-27 | 2005-06-16 | Maezawa Kyuso Industries Co Ltd | Flexible pipe coupling method, joint connector and caulking tool |
| KR100936127B1 (en) | 2007-11-13 | 2010-01-12 | 새한합성산업 주식회사 | A coupling of sewer pipe |
| JP2020094664A (en) * | 2018-12-14 | 2020-06-18 | 株式会社ブリヂストン | Pipe joint |
-
1999
- 1999-02-12 JP JP03365399A patent/JP3427766B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009257358A (en) * | 2008-04-12 | 2009-11-05 | Mirai Ind Co Ltd | Connecting hardware of water flow pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11315983A (en) | 1999-11-16 |
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