JP4656469B2

JP4656469B2 - Connection structure of thin-walled thin resin-coated metal tube and pressure-resistant rubber hose

Info

Publication number: JP4656469B2
Application number: JP2000347509A
Authority: JP
Inventors: 一美深谷
Original assignee: Usui Co Ltd
Current assignee: Usui Co Ltd
Priority date: 2000-11-15
Filing date: 2000-11-15
Publication date: 2011-03-23
Anticipated expiration: 2020-11-15
Also published as: JP2002147674A

Description

【０００１】
【発明の属する技術分野】
本願発明は、外周面に防錆のための樹脂被覆が施された薄肉細径金属管と耐圧ゴムホースとの接続構造に係り、より詳しくは金属管端部に接続用ソケットと耐圧ゴムホースをセットした状態でソケットをかしめて金属管と耐圧ゴムホースとを接続する方式の接続構造に関する。
【０００２】
【従来の技術】
外周面に防錆のための樹脂被覆が施された薄肉細径金属管と耐圧ゴムホースとの接続構造は、図１０（ａ）にその一例を示すごとく、外周面に樹脂被覆層１−１が施された薄肉細径金属管１の接続端部に所望の長さにわたって設けた連結筒壁１−２の近傍に転造加工（または切削加工）によりソケット溝１−３を予め形成し、この薄肉細径金属管１に有底円筒状で亜鉛めっきなどの表面処理が施された接続用ソケット２と耐圧ゴムホース３をセットした状態で、前記接続用ソケット２をかしめることにより接続用ソケット底部２−１が前記金属管１のソケット溝１−３に食い込んだ構造となっている。図中４は薄肉細径金属管１に内嵌された補強用パイプである。
しかるに、外周面に防錆用樹脂被覆が施された金属管の場合は、図１０（ｂ）に拡大して示すごとく、当該金属管１に予めソケット溝１−３を形成する際、外面樹脂被覆層１−１が剥がれてなくなってしまい、接続用ソケット２をかしめた際に、樹脂被覆層１−１が剥がれて露出した素地の部分を防錆できず、当該部分から腐食が進むという問題があった。かかる対策として、従来は樹脂被覆層１−１が剥がれてなくなった部分、すなわちソケット溝にかしめた接続用ソケット２後端と樹脂被覆層先端との間にわたって耐食性塗料を塗布して防錆力を高めている。
【０００３】
【発明が解決しようとする課題】
本発明は、上記した従来の樹脂被覆層剥離による防錆力低下の問題を解決するためになされたもので、耐食性塗料の塗布を必要とすることなく防錆力を確保することができる薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造を提供しようとするものである。
【０００４】
【課題を解決するための手段】
本発明に係る薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造は、接続用ソケットをかしめても、ソケットが食い込んだ部分に金属管の外面樹脂被覆層を確保できるようにしたもので、請求項１は連結筒壁の近傍にソケット溝を有する薄肉細径樹脂被覆金属管に有底円筒状の接続用ソケットを外嵌し、該金属管と接続用ソケットとの間に耐圧ゴムホースの端部を挿入セットした状態で、接続用ソケットをかしめることにより接続用ソケット底部を前記金属管のソケット溝に食い込ませてなる接続構造において、少なくとも前記ソケット溝の後端付近に樹脂被覆層を残存させた状態で当該ソケット溝に前記接続用ソケットの底部を食い込ませた構造となしたことを特徴とし、
請求項２は連結筒壁の近傍に転造加工により施したソケット溝を有する薄肉細径樹脂被覆金属管に有底円筒状の接続用ソケットを外嵌し、該金属管と接続用ソケットとの間に耐圧ゴムホースの端部を挿入セットした状態で、接続用ソケットをかしめることにより接続用ソケット底部を前記金属管のソケット溝に食い込ませてなる接続構造において、前記転造加工により施すソケット溝を樹脂被覆層が残存する管軸方向に緩い勾配の傾斜面と軸芯に垂直な面とで構成し、該ソケット溝に前記接続用ソケットの底部を食い込ませた構造となしたことを特徴とし、
請求項３は連結筒壁の近傍にソケット溝を有する薄肉細径樹脂被覆金属管に有底円筒状の接続用ソケットを外嵌し、該金属管と接続用ソケットとの間に耐圧ゴムホースの端部を挿入セットした状態で、接続用ソケットをかしめることにより接続用ソケット底部を前記金属管のソケット溝に食い込ませてなる接続構造において、前記ソケット溝を樹脂被覆層が残存するごとくプレス加工により形成し、該ソケット溝に前記接続用ソケットの底部を食い込ませた構造となしたことを特徴とし、
請求項４は端部に連結筒壁を有する薄肉細径樹脂被覆金属管に有底円筒状の接続用ソケットを外嵌し、該金属管と接続用ソケットとの間に耐圧ゴムホースの端部を挿入セットした状態で、接続用ソケットをかしめることにより接続用ソケット底部を前記金属管に食い込ませてなる接続構造において、ソケット溝を有しない薄肉細径樹脂被覆金属管に前記接続用ソケットを外嵌し、接続用ソケット底部を当該金属管の樹脂被覆層を残したまま薄肉細径樹脂被覆金属管に食い込ませた構造となしたことを特徴とするものである。
請求項５は連結筒壁の近傍に転造加工により施したソケット溝を有する薄肉細径樹脂被覆金属管に有底円筒状の接続用ソケットを外嵌し、該金属管と接続用ソケットとの間に耐圧ゴムホースの端部を挿入セットした状態で、接続用ソケットをかしめることにより接続用ソケット底部を前記金属管のソケット溝に食い込ませてなる接続構造において、前記転造加工により溝内に樹脂被覆層が残存しないソケット溝を形成し、前記接続用ソケットの底部の背面側開口端部で当該金属管の表面樹脂被覆層を覆うように、前記樹脂被覆層が残存しないソケット溝に接続用ソケットの底部を食い込ませた構造となしたことを特徴とし、
【０００５】
【発明の実施の形態】
図１は本発明の請求項２に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造の一実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図、図２は同請求項３に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造の一実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図、図３は同請求項３に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造の他の実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図、図４は同請求項３に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造の別の実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図、図５は同請求項４に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造の一実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図、図６は同請求項４に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造の他の実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図、図７は同請求項４に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造の別の実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図、図８は同請求項４に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造のさらに別の実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図、図９は同請求項５に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造の一実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図である。
【０００６】
すなわち、図１に示す接続構造は、連結筒壁１１−２の近傍に転造加工により施したソケット溝１１−３を有する薄肉細径樹脂被覆金属管１１に有底円筒状の接続用ソケット１２を外嵌し、該金属管と接続用ソケットとの間に耐圧ゴムホース１３の端部を挿入セットした状態で、接続用ソケット１２をかしめることにより接続用ソケット底部１２−１を前記金属管１１のソケット溝１１−３に食い込ませてなる接続構造であって、前記ソケット溝１１−３を樹脂被覆層１１−１が残存する管軸方向に緩い勾配の傾斜面１１−３ａと軸芯に垂直な面１１−３ｂとで構成したもので、この場合は軸芯より遠い所ほど加工率が低く樹脂層は厚く残り、軸芯に近づくほど加工率が高くなって樹脂層は薄くなり残留する樹脂層もテーパ状となり、接続用ソケット１２をかしめても接続用ソケット底部１２−１の食込み部および金属管１１の傾斜面１１−３ａの防錆を確保できる。
【０００７】
図２〜図４に示す接続構造は、ソケット溝を樹脂被覆層が残存するごとくプレス加工により形成したもので、このうち図２に示す接続構造は、連結筒壁３１−２の近傍にソケット溝３１−３を有する薄肉細径樹脂被覆金属管３１に有底円筒状の接続用ソケット３２を外嵌し、該金属管と接続用ソケットとの間に耐圧ゴムホース３３の端部を挿入セットした状態で、接続用ソケット３２をかしめることにより接続用ソケット底部３２−１を前記金属管のソケット溝に食い込ませてなる接続構造であって、この場合は前記ソケット溝３１−３を樹脂被覆層３１−１が残存するようプレス加工により形成し、該ソケット溝３１−３に前記接続用ソケット底部３２−１を食い込ませた構造となしたもので、この接続構造の場合も接続用ソケット底部３２−１の食込み部および金属管３１のソケット溝３１−３の防錆を確保できる。
【０００８】
また図３に示す接続構造は、連結筒壁４１−２の近傍にソケット溝４１−３を有する薄肉細径樹脂被覆金属管４１に有底円筒状の接続用ソケット４２を外嵌し、該金属管と接続用ソケットとの間に耐圧ゴムホース４３の端部を挿入セットした状態で、接続用ソケット４２をかしめることにより接続用ソケット底部４２−１を前記金属管のソケット溝４１−３に食い込ませてなる接続構造であって、この場合も図３の場合と同様、ソケット溝４１−３を樹脂被覆層４１−１が残存するようプレス加工により形成し、該ソケット溝４１−３に前記接続用ソケット底部４２−１を食い込ませた構造となしたもので、この接続構造の場合も接続用ソケット底部４２−１の食込み部および金属管４１のソケット溝４１−３の防錆を確保できる。
【０００９】
さらに図４に示す接続構造は、連結筒壁５１−２の近傍にソケット溝５１−３を有する薄肉細径樹脂被覆金属管５１に有底円筒状の接続用ソケット５２を外嵌し、該金属管と接続用ソケットとの間に耐圧ゴムホース５３の端部を挿入セットした状態で、接続用ソケット５２をかしめることにより接続用ソケット底部５２−１を前記金属管のソケット溝５１−３に食い込ませてなる接続構造であって、この場合も図３の場合と同様、ソケット溝５１−３を樹脂被覆層５１−１が残存するごとくプレス加工により形成し、該ソケット溝５１−３に前記接続用ソケット底部５２−１を食い込ませた構造となしたもので、この接続構造の場合も接続用ソケット底部５２−１の食込み部および金属管５１のソケット溝５１−３の防錆を確保できる。
【００１０】
上記図１〜図４に示す接続構造は、いずれも薄肉細径樹脂被覆金属管に予めソケット溝を形成して接続用ソケットをかしめる方式によるものであるが、図５〜図８に示す接続構造は、薄肉細径樹脂被覆金属管にソケット溝を形成せずに接続用ソケットをかしめる方式によるもので、図５に示す接続構造は、連結筒壁６１−２を有する薄肉細径樹脂被覆金属管６１の樹脂被覆層６１−１とオーバーラップするように有底円筒状の接続用ソケット６２を外嵌し、該金属管と接続用ソケットとの間に耐圧ゴムホース６３の端部を挿入セットした状態で、接続用ソケット６２をかしめることにより接続用ソケット底部６２−１を前記金属管６１の外周面に食い込ませてなる接続構造であって、この場合は接続用ソケット底部６２−１の金属管６１との対向面を円弧状断面に形成し、この円弧状断面の接続用ソケット底部６２−１を薄肉細径樹脂被覆金属管６１に食い込ませた構造となしたもので、この接続構造の場合も食込み部６１−３には樹脂被覆層６１−１がそのまま残存しているので該食込み部６１−３およびソケット６２の底部６２−１の対向面の防錆を確保できる。
【００１１】
図６に示す接続構造は、薄肉細径樹脂被覆金属管に食込む接続用ソケット底部の断面構造を斜面と水平面とで構成したもので、連結筒壁７１−２を有する薄肉細径樹脂被覆金属管７１に有底円筒状の接続用ソケット７２を外嵌し、該金属管と接続用ソケットとの間に耐圧ゴムホース７３の端部を挿入セットした状態で、接続用ソケット７２をかしめることにより接続用ソケット底部７２−１を前記金属管７１の外周面に食い込ませてなる接続構造であって、この場合は接続用ソケット底部７２−１の金属管７１との対向面を中央部は水平面７２−１ａとし、この水平面７２−１ａの外面側と内面側を斜面７２−１ｂとし、さらに水平面７２−１ａと斜面７２−１ｂの接続部分と、斜面７２−１ｂと垂直面７２−１ｃの接続部分をそれぞれ丸く形成し、この斜面と水平面とで構成した接続用ソケット底部７２−１を薄肉細径樹脂被覆金属管７１に食い込ませた構造となしたもので、この接続構造の場合も食込み部７１−３には樹脂被覆層７１−１がそのまま残存しているので該食込み部７１−３およびソケット７２の底部７２−１の対向面の防錆を確保できる。
【００１２】
図７に示す接続構造は、薄肉細径樹脂被覆金属管に食込む接続用ソケット底部の断面構造をＶ字状に形成したもので、連結筒壁８１−２を有する薄肉細径樹脂被覆金属管８１に有底円筒状の接続用ソケット８２を外嵌し、該金属管と接続用ソケットとの間に耐圧ゴムホース８３の端部を挿入セットした状態で、接続用ソケット８２をかしめることにより接続用ソケット底部８２−１を前記金属管８１の外周面に食い込ませてなる接続構造であって、この場合は接続用ソケット底部８２−１の金属管８１との対向面をＶ字状断面となすとともに、このＶ字状断面の各角部は図７に示すものと同様、それぞれ丸く形成し、このＶ字状断面の接続用ソケット底部８２−１を薄肉細径樹脂被覆金属管８１に食い込ませた構造となしたもので、この接続構造の場合も食込み部８１−３には樹脂被覆層８１−１がそのまま残存しているので該食込み部８１−３およびソケット８２の底部８２−１の対向面の防錆を確保できる。
【００１３】
図８に示す接続構造は、薄肉細径樹脂被覆金属管に食込む接続用ソケット底部の断面構造を外側に広がるラッパ状に形成したもので、連結筒壁９１−２を有する薄肉細径樹脂被覆金属管９１に有底円筒状の接続用ソケット９２を外嵌し、該金属管と接続用ソケットとの間に耐圧ゴムホース９３の端部を挿入セットした状態で、接続用ソケット９２をかしめることにより接続用ソケット底部９２−１を前記金属管９１の外周面に食い込ませてなる接続構造であって、この場合は接続用ソケット底部９２−１の金属管９１との対向面をラッパ状断面となし、このラッパ状断面の接続用ソケット底部９２−１を薄肉細径樹脂被覆金属管９１に食い込ませた構造となしたもので、この接続構造の場合も食込み部９１−３には樹脂被覆層９１−１がそのまま残存しているので該食込み部９１−３およびソケット９２の底部９２−１の対向面の防錆を確保できる。
【００１４】
図９に示す接続構造は、連結筒壁１１１−２の近傍に転造加工により施したソケット溝１１１−３を有する薄肉細径樹脂被覆金属管１１１に有底円筒状の接続用ソケット１１２を外嵌し、該金属管と接続用ソケットとの間に耐圧ゴムホース１１３の端部を挿入セットした状態で、接続用ソケット１１２をかしめることにより接続用ソケット底部１１２−１を前記金属管のソケット溝１１１−３に食い込ませてなる接続構造であって、この場合は前記ソケット溝１１１−３を転造加工によりたとえ当該溝内に樹脂被覆層が存在しないような状態に形成されても、接続用ソケット底部１１２−１の背面側開口端部に当該金属管１１１の表面樹脂被覆層１１１−１を覆う段部１１２−２を形成し、かしめにより前記樹脂被覆層が残存しないソケット溝１１１−３に接続用ソケット１１２の底部を食い込ませると共に、前記段部１１２−２の部分で金属管１１１の樹脂被覆層１１１−１を覆う構造となしたもので、この場合はソケット溝１１１−３の部分にたとえ樹脂被覆層１１１−１がなくても、前記段部１１２−２の部分で金属管１１１の樹脂被覆層１１１−１を覆っているので、この部分でシールされることにより接続用ソケット底部１１２−１の食込み部および金属管１１１のソケット溝１１１−３の防錆を確保できる。
【００１５】
なお、上記図１〜図９に示す接続構造における１４は、図１０に示すものと同様、薄肉細径樹脂被覆金属管に内嵌された補強用パイプである。また図１〜図９に示す接続構造は、金属管に直接樹脂層を設けた例を示したが、下地に金属めっき層を設けても同様の効果が得られることはいうまでもない。
【００１６】
【発明の効果】
以上説明したごとく、本発明によれば、薄肉細径樹脂被覆金属管に接続用ソケットをかしめても、ソケットが食い込んだ部分に当該金属管の外面樹脂被覆層を確保できるので、ソケットが食込んだ部分の管表面もソケット底部の対向面も防錆できるという優れた効果を奏し、薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造として極めて有用性に富むものである。
【図面の簡単な説明】
【図１】本発明の請求項２に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造の一実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図である。
【図２】同請求項３に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造の一実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図である。
【図３】同請求項３に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造の他の実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図である。
【図４】同請求項３に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造の別の実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図である。
【図５】同請求項４に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造の一実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図である。
【図６】同請求項４に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造の他の実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図である。
【図７】同請求項４に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造の別の実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図である。
【図８】同請求項４に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造のさらに別の実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図である。
【図９】同請求項５に対応する薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造の一実施例を示したもので、（ａ）は薄肉細径樹脂被覆金属管に接続用ソケットをかしめた状態を示す一部縦断側面図、（ｂ）は（ａ）の要部拡大縦断側面図である。
【図１０】本発明の対象とする従来の薄肉細径樹脂被覆金属管と耐圧ゴムホースとの接続構造の一例を示す縦断面図である。
【符号の説明】
１１、３１、４１、５１、６１、７１、８１、９１、１１１薄肉細径樹脂被覆金属管
１１−１、３１−１、４１−１、５１−１、６１−１、７１−１、８１−１、９１−１、１１１−１樹脂被覆層
１１−２、３１−２、４１−２、５１−２、６１−２、７１−２、８１−２、９１−２、１１１−２連結筒壁
１１−３、３１−３、４１−３、５１−３、１１１−３ソケット溝
１２、３２、４２、５２、６２、７２、８２、９２、１１２接続用ソケット
１２−１、３２−１、４２−１、５２−１、１１２−１ソケット底部
１３、３３、４３、５３、６３、７３、８３、９３、１１３耐圧ゴムホース
６１−３、７１−３、８１−３、９１−３食込み部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connection structure between a thin-walled thin metal tube whose outer peripheral surface is coated with a resin coating for rust prevention and a pressure-resistant rubber hose. The present invention relates to a connection structure in which a socket is caulked in a state to connect a metal tube and a pressure-resistant rubber hose.
[0002]
[Prior art]
As shown in FIG. 10 (a), the connection structure between the thin-walled thin metal pipe having a resin coating for rust prevention on the outer peripheral surface and the pressure resistant rubber hose has a resin coating layer 1-1 on the outer peripheral surface. A socket groove 1-3 is formed in advance by rolling (or cutting) in the vicinity of the connecting cylindrical wall 1-2 provided over a desired length at the connection end of the thin-walled thin metal tube 1 provided. The bottom of the connection socket is formed by caulking the connection socket 2 with the connection socket 2 and the pressure resistant rubber hose 3 having a cylindrical shape with a bottom and a surface treatment such as galvanization applied to the thin metal tube 1 2-1 has a structure in which the socket groove 1-3 of the metal tube 1 is bitten. In the figure, reference numeral 4 denotes a reinforcing pipe fitted into the thin-walled thin metal tube 1.
However, in the case of a metal tube having a resin coating for rust prevention on the outer peripheral surface, as shown in an enlarged view in FIG. 10 (b), when forming the socket groove 1-3 on the metal tube 1 in advance, the outer surface resin When the covering layer 1-1 is not peeled off and the connecting socket 2 is caulked, the exposed portion of the substrate cannot be rusted and the corrosion proceeds from the portion. was there. Conventionally, as a countermeasure, a corrosion-resistant paint is applied over the portion where the resin coating layer 1-1 has not been peeled off, that is, between the rear end of the connecting socket 2 crimped in the socket groove and the front end of the resin coating layer. It is increasing.
[0003]
[Problems to be solved by the invention]
The present invention has been made in order to solve the above-described problem of a decrease in rust prevention power due to peeling of the resin coating layer, and is a thin-walled thin film that can ensure rust prevention power without requiring the application of a corrosion-resistant paint. The present invention intends to provide a connection structure between a diameter resin-coated metal tube and a pressure-resistant rubber hose.
[0004]
[Means for Solving the Problems]
The connection structure of the thin-walled thin resin-coated metal tube and the pressure-resistant rubber hose according to the present invention is such that even if the connection socket is caulked, the outer surface resin coating layer of the metal tube can be secured in the portion where the socket bites, According to a first aspect of the present invention, a bottomed cylindrical connecting socket is externally fitted to a thin-walled thin resin-coated metal pipe having a socket groove in the vicinity of the connecting cylinder wall, and the end of the pressure-resistant rubber hose is between the metal pipe and the connecting socket. In the connection structure in which the bottom of the connection socket is bitten into the socket groove of the metal tube by caulking the connection socket with the portion inserted and set, the resin coating layer remains at least near the rear end of the socket groove. It is characterized by having a structure in which the bottom of the socket for connection is bitten into the socket groove in a state of being made,
According to a second aspect of the present invention, a bottomed cylindrical connecting socket is externally fitted to a thin-walled thin resin-coated metal pipe having a socket groove formed by rolling in the vicinity of the connecting cylinder wall, and the metal pipe and the connecting socket are connected to each other. In a connection structure in which the bottom of the connection socket is bitten into the socket groove of the metal tube by caulking the connection socket with the end of the pressure rubber hose inserted and set therebetween, the socket groove formed by the rolling process Characterized in that the resin coating layer is composed of an inclined surface having a gentle slope in the tube axis direction and a surface perpendicular to the shaft core, and the bottom of the socket for connection is cut into the socket groove. ,
According to a third aspect of the present invention, a bottomed cylindrical connecting socket is externally fitted to a thin and thin resin-coated metal pipe having a socket groove in the vicinity of the connecting cylinder wall, and the end of the pressure-resistant rubber hose is between the metal pipe and the connecting socket. In the connection structure in which the bottom of the connection socket is bitten into the socket groove of the metal tube by caulking the connection socket in a state where the portion is inserted and set, the socket groove is formed by pressing as the resin coating layer remains. Formed and has a structure in which the bottom of the socket for connection is cut into the socket groove,
According to a fourth aspect of the present invention, a bottomed cylindrical connecting socket is externally fitted to a thin-walled thin resin-coated metal tube having a connecting cylindrical wall at the end, and the end of the pressure-resistant rubber hose is interposed between the metal tube and the connecting socket. In the connection structure in which the bottom of the connection socket is bitten into the metal pipe by caulking the connection socket in the inserted and set state, the connection socket is removed from the thin thin resin-coated metal pipe having no socket groove. It is characterized in that it has a structure in which the bottom of the connecting socket is bitten into the thin-walled thin resin-coated metal tube while leaving the resin coating layer of the metal tube.
According to a fifth aspect of the present invention, a bottomed cylindrical connecting socket is externally fitted to a thin-walled thin resin-coated metal pipe having a socket groove formed by rolling in the vicinity of the connecting cylinder wall, and the metal pipe and the connecting socket are connected to each other. In a connection structure in which the bottom of the connection socket is bitten into the socket groove of the metal tube by caulking the connection socket with the end of the pressure-resistant rubber hose inserted and set therebetween, in the groove by the rolling process. A socket groove in which the resin coating layer does not remain is formed, and a connection is made to the socket groove in which the resin coating layer does not remain so that the surface resin coating layer of the metal tube is covered with the back side opening end of the bottom of the connection socket. It is characterized by a structure that bites the bottom of the socket,
[0005]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an embodiment of a connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose corresponding to claim 2 of the present invention. A partially longitudinal side view showing a state in which the socket is caulked, (b) is an enlarged longitudinal side view of an essential part of (a), and FIG. 2 is a view of a thin thin resin resin-coated metal tube corresponding to claim 3 and a pressure rubber hose. 1 shows an embodiment of a connection structure, in which (a) is a partially longitudinal side view showing a state in which a connection socket is caulked on a thin-walled thin resin-coated metal tube, and (b) is an enlarged view of a main part of (a). FIG. 3 shows another embodiment of a connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose corresponding to the third aspect. FIG. 3A shows a thin-walled thin resin-coated metal tube. FIG. 4 is a partially longitudinal side view showing a state in which the connection socket is caulked to (2), (b) is an enlarged longitudinal side view of the main part of (a). FIG. 4 shows another embodiment of the connection structure between the thin-walled thin resin-coated metal tube and the pressure-resistant rubber hose corresponding to the third aspect of the present invention. FIG. 5B is an enlarged vertical side view of the main part of FIG. 5A, and FIG. 5 is a connection of a thin-walled thin resin-coated metal tube corresponding to claim 4 and a pressure-resistant rubber hose. 1 shows an embodiment of the structure, (a) is a partially longitudinal side view showing a state in which a socket for connection is caulked on a thin-walled thin resin-coated metal tube, and (b) is an enlarged longitudinal section of a main part of (a). FIG. 6 is a side view showing another embodiment of a connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose corresponding to the fourth aspect of the present invention. A partially longitudinal side view showing a state in which a socket for connection is crimped, (b) is an enlarged longitudinal side view of an essential part of (a), 7 shows another embodiment of the connection structure between the thin-walled thin resin-coated metal tube and the pressure-resistant rubber hose corresponding to claim 4, and (a) shows a connection socket on the thin-walled thin resin-coated metal tube. A partially longitudinal side view showing a caulked state, (b) is an enlarged longitudinal side view of the main part of (a), and FIG. 8 is a connection structure of a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose corresponding to claim 4 Fig. 4 shows still another embodiment of the present invention, in which (a) is a partially longitudinal side view showing a state in which a connection socket is caulked on a thin-walled thin resin-coated metal tube, and (b) is an enlarged view of a main part of (a). FIG. 9 is a longitudinal side view, and FIG. 9 shows an embodiment of a connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose corresponding to claim 5; Partially longitudinal side view showing the caulked state of the connection socket, (b) is an enlarged longitudinal side view of the main part of (a) It is.
[0006]
That is, the connection structure shown in FIG. 1 has a bottomed cylindrical connection socket 12 on a thin-walled thin resin-coated metal tube 11 having a socket groove 11-3 formed by rolling in the vicinity of the connecting cylinder wall 11-2. And the connection socket bottom 12-1 is connected to the metal tube 11 by caulking the connection socket 12 with the end of the pressure-resistant rubber hose 13 inserted and set between the metal tube and the connection socket. The socket groove 11-3 is bitten into the socket groove 11-3, and the socket groove 11-3 is perpendicular to the inclined surface 11-3a and the shaft core having a gentle gradient in the tube axis direction where the resin coating layer 11-1 remains. In this case, the processing rate is lower and the resin layer is thicker as it is farther from the shaft center, and the processing rate is higher and the resin layer is thinner and remains as it gets closer to the shaft core. Layer also tapers for connection Socket 12 can be secured to rust of the inclined surface 11-3a of the biting portion and the metal tube 11 also crimped connecting socket bottom 12-1.
[0007]
The connection structure shown in FIGS. 2 to 4 is formed by pressing the socket groove so that the resin coating layer remains. Of these, the connection structure shown in FIG. 2 has a socket groove in the vicinity of the connecting cylindrical wall 31-2. A state in which a bottomed cylindrical connecting socket 32 is externally fitted to a thin-walled thin resin-coated metal tube 31 having 31-3, and an end portion of the pressure-resistant rubber hose 33 is inserted and set between the metal tube and the connecting socket. In this connection structure, the connecting socket 32 is caulked to cause the connecting socket bottom portion 32-1 to bite into the socket groove of the metal tube. In this case, the socket groove 31-3 is connected to the resin coating layer 31. -1 is formed by press working so that the socket bottom portion 32-1 for connection is inserted into the socket groove 31-3. In this connection structure as well, the socket bottom portion 3 for connection is provided. Biting portion of -1 and can be secured rust socket groove 31-3 of the metal tube 31.
[0008]
Further, in the connection structure shown in FIG. 3, a bottomed cylindrical connection socket 42 is externally fitted to a thin and thin resin-coated metal tube 41 having a socket groove 41-3 in the vicinity of the connecting cylindrical wall 41-2, and the metal With the end of the pressure-resistant rubber hose 43 inserted and set between the pipe and the connection socket, the connection socket bottom 42-1 is bitten into the socket groove 41-3 of the metal pipe by caulking the connection socket 42. In this case, as in the case of FIG. 3, the socket groove 41-3 is formed by pressing so that the resin coating layer 41-1 remains, and the connection is made to the socket groove 41-3. In this connection structure, it is possible to ensure rust prevention of the biting portion of the socket bottom portion for connection 42-1 and the socket groove 41-3 of the metal tube 41.
[0009]
Further, in the connection structure shown in FIG. 4, a bottomed cylindrical connection socket 52 is externally fitted to a thin and thin resin-coated metal tube 51 having a socket groove 51-3 in the vicinity of the connecting cylinder wall 51-2, and the metal With the end of the pressure-resistant rubber hose 53 inserted and set between the tube and the connection socket, the connection socket 52 is caulked to bite the connection socket bottom portion 52-1 into the socket groove 51-3 of the metal tube. In this case as well, as in the case of FIG. 3, the socket groove 51-3 is formed by pressing so that the resin coating layer 51-1 remains, and the connection is made to the socket groove 51-3. In this connection structure, it is possible to ensure rust prevention of the biting portion of the socket bottom portion 52-1 for connection and the socket groove 51-3 of the metal tube 51.
[0010]
The connection structure shown in FIGS. 1 to 4 is based on a system in which a socket groove is formed in advance in a thin and thin resin-coated metal tube and the connection socket is caulked. However, the connection structure shown in FIGS. The structure is based on a method in which a socket for connection is caulked without forming a socket groove in a thin-walled thin resin-coated metal tube. The connection structure shown in FIG. 5 has a thin-walled thin-diameter resin coating having a connecting cylindrical wall 61-2. A bottomed cylindrical connecting socket 62 is externally fitted so as to overlap the resin coating layer 61-1 of the metal tube 61, and an end of the pressure-resistant rubber hose 63 is inserted between the metal tube and the connecting socket. In this state, the connection socket 62 is caulked to cause the connection socket bottom 62-1 to bite into the outer peripheral surface of the metal tube 61. In this case, the connection socket bottom 62-1 With metal tube 61 The facing surface is formed in an arc-shaped cross section, and the connection socket bottom 62-1 having the arc-shaped cross section is bitten into the thin-walled thin resin-coated metal tube 61. Since the resin coating layer 61-1 remains as it is in 61-3, it is possible to ensure rust prevention of the facing surfaces of the biting portion 61-3 and the bottom portion 62-1 of the socket 62.
[0011]
The connection structure shown in FIG. 6 is a thin-walled thin resin-coated metal having a connecting cylindrical wall 71-2, in which the cross-sectional structure of the bottom of the connecting socket that bites into the thin-walled thin resin-coated metal pipe is composed of a slope and a horizontal surface. By fitting a connecting socket 72 having a cylindrical shape with a bottom to the pipe 71 and caulking the connecting socket 72 with the end of the pressure-resistant rubber hose 73 inserted and set between the metal pipe and the connecting socket. In this connection structure, the connecting socket bottom portion 72-1 is cut into the outer peripheral surface of the metal tube 71. In this case, the opposite surface of the connecting socket bottom portion 72-1 to the metal tube 71 is the central portion at the horizontal surface 72. -1a, the outer surface side and the inner surface side of the horizontal surface 72-1a are the inclined surfaces 72-1b, the connecting portions of the horizontal surfaces 72-1a and 72-1b, and the connecting portions of the inclined surfaces 72-1b and the vertical surfaces 72-1c. Round each The connection socket bottom 72-1 composed of the slope and the horizontal plane is made to bite into the thin-walled thin resin-coated metal tube 71. In the case of this connection structure as well, Since the resin coating layer 71-1 remains as it is, it is possible to ensure the rust prevention of the opposing surfaces of the biting portion 71-3 and the bottom portion 72-1 of the socket 72.
[0012]
The connection structure shown in FIG. 7 has a V-shaped cross-sectional structure of a connecting socket bottom portion that bites into a thin and thin resin-coated metal tube, and has a thin and thin resin-coated metal tube having a connecting cylinder wall 81-2. A connection socket 82 having a bottomed cylindrical shape is externally fitted to 81 and connected by caulking the connection socket 82 with the end of the pressure-resistant rubber hose 83 inserted and set between the metal tube and the connection socket. In this connection structure, the socket bottom portion 82-1 is cut into the outer peripheral surface of the metal tube 81. In this case, the surface of the connection socket bottom portion 82-1 facing the metal tube 81 has a V-shaped cross section. At the same time, each corner of the V-shaped cross section is formed round like the one shown in FIG. 7, and the connecting socket bottom 82-1 of the V-shaped cross section is bitten into the thin-walled thin resin-coated metal tube 81. This connection The bite portion 81-3 in the case of concrete can be ensured rust opposing surface of the bottom portion 82-1 of the food addition unit 81-3, and the socket 82 so that the resin coating layer 81-1 remains unchanged.
[0013]
The connection structure shown in FIG. 8 is formed by forming a cross-sectional structure of a bottom part of a connection socket that bites into a thin-walled thin resin-coated metal tube into a trumpet shape that spreads outward, and has a thin-walled thin-diameter resin coating having a connecting cylindrical wall 91-2 A connecting socket 92 having a bottomed cylindrical shape is externally fitted to the metal tube 91, and the connecting socket 92 is caulked with the end of the pressure-resistant rubber hose 93 inserted and set between the metal tube and the connecting socket. In this case, the connection socket bottom portion 92-1 bites into the outer peripheral surface of the metal tube 91. In this case, the surface facing the metal tube 91 of the connection socket bottom portion 92-1 has a trumpet-shaped cross section. None, the connection socket bottom portion 92-1 having a trumpet-shaped cross section is made to bite into the thin-walled thin resin-coated metal tube 91. Even in this connection structure, the biting portion 91-3 has a resin coating layer. 91-1 is Since the or remaining can be secured rust opposing surface of the bottom portion 92-1 of the food addition unit 91-3, and the socket 92.
[0014]
The connection structure shown in FIG. 9 is such that a bottomed cylindrical connection socket 112 is attached to a thin-walled thin resin-coated metal tube 111 having a socket groove 111-3 formed by rolling in the vicinity of the connecting cylindrical wall 111-2. In the state where the end of the pressure-resistant rubber hose 113 is inserted and set between the metal tube and the connection socket, the connection socket 112 is caulked to thereby connect the connection socket bottom 112-1 to the socket groove of the metal tube. 111-3 is a connection structure that bites into the socket 111. In this case, even if the socket groove 111-3 is formed by a rolling process so that no resin coating layer is present in the groove, A step portion 112-2 that covers the surface resin coating layer 111-1 of the metal tube 111 is formed at the back side opening end of the socket bottom portion 112-1, and the resin coating layer does not remain by caulking. 111-3 has a structure in which the bottom of the connection socket 112 is bitten and the resin coating layer 111-1 of the metal tube 111 is covered with the step 112-2. In this case, the socket groove 111- Even if the resin coating layer 111-1 is not present in the portion 3, the step 112-2 covers the resin coating layer 111-1 of the metal tube 111. Rust prevention of the biting portion of the socket bottom portion 112-1 and the socket groove 111-3 of the metal tube 111 can be ensured.
[0015]
In addition, 14 in the connection structure shown in the said FIGS. 1-9 is the reinforcement pipe internally fitted by the thin thin resin-coated metal pipe like the thing shown in FIG. Moreover, although the connection structure shown in FIGS. 1-9 showed the example which provided the resin layer directly in the metal pipe, it cannot be overemphasized that the same effect is acquired even if it provides a metal plating layer in the foundation | substrate.
[0016]
【The invention's effect】
As described above, according to the present invention, since the outer surface resin coating layer of the metal tube can be secured in the portion where the socket has bitten even if the connecting socket is caulked to the thin-walled thin resin-coated metal tube, the socket bites. This has an excellent effect that the surface of the pipe and the opposite surface of the bottom of the socket can be rust-proof, and is extremely useful as a connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose.
[Brief description of the drawings]
FIG. 1 shows one embodiment of a connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose corresponding to claim 2 of the present invention, and (a) is connected to a thin-walled thin resin-coated metal tube. FIG. 4B is a partially longitudinal side view showing a state in which the socket for caulking is crimped, and FIG.
FIG. 2 shows an embodiment of a connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose corresponding to claim 3, wherein (a) shows a connection socket on the thin-walled thin resin-coated metal tube. FIG. 2 is a partially longitudinal side view showing a state in which crimping is performed, and FIG.
FIG. 3 shows another embodiment of a connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose corresponding to claim 3, wherein (a) is for connecting to a thin-walled thin resin-coated metal tube. A partially longitudinal side view showing a state in which the socket is caulked, (b) is an enlarged longitudinal sectional side view of the main part of (a).
FIG. 4 shows another embodiment of a connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose corresponding to claim 3, wherein (a) is for connecting to a thin-walled thin resin-coated metal tube. A partially longitudinal side view showing a state in which the socket is caulked, (b) is an enlarged longitudinal sectional side view of the main part of (a).
FIG. 5 shows an embodiment of a connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose corresponding to claim 4; (a) is a connection socket to the thin-walled thin resin-coated metal tube. FIG. 2 is a partially longitudinal side view showing a state in which crimping is performed, and FIG.
FIG. 6 shows another embodiment of a connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose corresponding to claim 4, wherein (a) is for connecting to a thin-walled thin resin-coated metal tube. A partially longitudinal side view showing a state in which the socket is caulked, (b) is an enlarged longitudinal sectional side view of the main part of (a).
FIG. 7 shows another embodiment of a connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose corresponding to claim 4, wherein (a) is for connecting to a thin-walled thin resin-coated metal tube. A partially longitudinal side view showing a state in which the socket is caulked, (b) is an enlarged longitudinal sectional side view of the main part of (a).
FIG. 8 shows still another embodiment of the connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose corresponding to claim 4, wherein (a) is connected to a thin-walled thin resin-coated metal tube. FIG. 4B is a partially longitudinal side view showing a state in which the socket for caulking is crimped, and FIG.
FIG. 9 shows an embodiment of a connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose corresponding to claim 5; (a) shows a connection socket on the thin-walled thin resin-coated metal tube. FIG. 2 is a partially longitudinal side view showing a state in which crimping is performed, and FIG.
FIG. 10 is a longitudinal sectional view showing an example of a connection structure between a conventional thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose that is an object of the present invention.
[Explanation of symbols]
11, 31, 41, 51, 61, 71, 81, 91, 111 Thin and thin resin-coated metal tubes 11-1, 31-1, 41-1, 51-1, 61-1, 71-1, 81- 1, 91-1, 111-1 Resin coating layer 11-2, 31-2, 41-2, 51-2, 61-2, 71-2, 81-2, 91-2, 111-2 Connecting cylinder wall 11-3, 31-3, 41-3, 51-3, 111-3 Socket grooves 12, 32, 42, 52, 62, 72, 82, 92, 112 Sockets for connection 12-1, 32-1, 42 -1, 52-1, 112-1 Socket bottom part 13, 33, 43, 53, 63, 73, 83, 93, 113 Pressure-resistant rubber hose 61-3, 71-3, 81-3, 91-3 Encroaching part

Claims

A bottomed cylindrical connecting socket is externally fitted to a thin, thin resin-coated metal tube having a socket groove near the connecting cylinder wall, and the end of the pressure-resistant rubber hose is inserted between the metal tube and the connecting socket. In a connection structure in which the bottom of the connection socket is bitten into the socket groove of the metal tube by caulking the connection socket in a state where the resin coating layer is left at least near the rear end of the socket groove. A connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose, wherein the socket groove has a structure in which the bottom of the connection socket is bitten.

A bottomed cylindrical connecting socket is externally fitted to a thin and thin resin-coated metal pipe having a socket groove formed by rolling in the vicinity of the connecting cylinder wall, and a pressure-resistant rubber hose is provided between the metal pipe and the connecting socket. In a connection structure in which the bottom of the connection socket is bitten into the socket groove of the metal tube by caulking the connection socket with the end of the socket inserted and set, the socket groove formed by the rolling process is formed with the resin coating layer. A thin-walled thin diameter characterized in that it has a structure in which the bottom surface of the connecting socket is cut into the socket groove, and is composed of an inclined surface having a gentle slope in the tube axis direction and a surface perpendicular to the shaft core. Connection structure between resin-coated metal tube and pressure-resistant rubber hose.

A bottomed cylindrical connecting socket is externally fitted to a thin, thin resin-coated metal tube having a socket groove near the connecting cylinder wall, and the end of the pressure-resistant rubber hose is inserted between the metal tube and the connecting socket. In the connection structure in which the bottom of the connection socket is bitten into the socket groove of the metal tube by caulking the connection socket in this state, the socket groove is formed by pressing so that the resin coating layer remains, A connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose, wherein the socket groove has a structure in which the bottom of the connection socket is bitten.

A state where a bottomed cylindrical connecting socket is externally fitted to a thin-walled thin resin-coated metal tube having a connecting cylindrical wall at the end, and the end of the pressure-resistant rubber hose is inserted and set between the metal tube and the connecting socket In the connection structure in which the bottom of the connection socket is bitten into the metal tube by caulking the connection socket, the connection socket is externally fitted to a thin thin resin-coated metal tube having no socket groove, and connected. A connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose, characterized in that the socket bottom portion is cut into the thin-walled thin resin-coated metal tube while leaving the resin coating layer of the metal tube.

A bottomed cylindrical connecting socket is externally fitted to a thin and thin resin-coated metal pipe having a socket groove formed by rolling in the vicinity of the connecting cylinder wall, and a pressure-resistant rubber hose is provided between the metal pipe and the connecting socket. In the connection structure in which the bottom of the connection socket is bitten into the socket groove of the metal tube by caulking the connection socket with the end portion inserted and set, a resin coating layer is formed in the groove by the rolling process. A socket groove that does not remain is formed, and the bottom portion of the connection socket is placed in the socket groove where the resin coating layer does not remain so as to cover the resin coating layer on the surface of the metal tube at the back side opening end of the bottom of the connection socket. A connection structure between a thin-walled thin resin-coated metal tube and a pressure-resistant rubber hose, which is characterized by a bite-in structure.