JP4318359B2

JP4318359B2 - Separation prevention device for pipe joints

Info

Publication number: JP4318359B2
Application number: JP36438999A
Authority: JP
Inventors: 保前西; 昭人戸継
Original assignee: Waterworks Technology Development Organization Co Ltd
Current assignee: Waterworks Technology Development Organization Co Ltd
Priority date: 1999-12-22
Filing date: 1999-12-22
Publication date: 2009-08-19
Anticipated expiration: 2019-12-22
Also published as: JP2001173853A

Description

【０００１】
【発明の属する技術分野】
本発明は、受口管部に挿入接続された挿入管部の外周面と、該挿入管部に外装する状態で前記受口管部に管軸芯方向から固定連結される押輪の内周面との間に、挿入管部の外周面に喰い込み可能な抜止部材を設けるとともに、前記抜止部材を挿入管部の外周面に押圧する押圧手段を設けてある管継手部の離脱防止装置に関する。
【０００２】
【従来の技術】
この種の管継手部の離脱防止装置としては、図１０、図１１に示すように、前記押輪４の内周面に、抜止部材５０を管径方向内方から着脱自在に装着可能な凹部９を形成し、この凹部９内の抜止部材５０に対して管径方向内方への押付力を付与するための押圧手段Ａを構成するボルト１１を、押輪４の外周面側から螺合して、該ボルト１１の先端に形成された偏平状のカム面１１ａと抜止部材５０の傾斜外側面５０ａとをもって、受口管部１と挿入管部２との管軸芯Ｘ方向での相対離脱移動に連れて抜止部材５０を管径方向内方側に変位させるカム手段Ｂを構成するとともに、抜止部材５０の内側面５０ｂには、管周方向に沿って挿入管部２の外周面２ａに喰い込み可能な二本の第1 喰込み突起部５０Ａと、管軸芯Ｘ方向に沿って挿入管部２の外周面２ａに喰い込み可能な一本の第２喰込み突起部５０Ｂとを、ほぼエの字状に配置させた状態で一体形成したものが提案されている（例えば、特開平７−２８０１４７号公報参照）
【０００３】
【発明が解決しようとする課題】
従来の管継手部の離脱防止装置では、押圧手段Ａを構成するボルトを締込み操作して、抜止部材５０に管径方向内方への押付力を付与すると、該抜止部材５０の内側面に形成された第1 喰込み突起部５０Ａと第２喰込み突起部５０Ｂが挿入管部２の外周面２ａに喰い込み、接続された受口管部１と挿入管部２との管軸芯Ｘ方向での相対移動を阻止する離脱防止機能を発揮させることができるばかりでなく、受口管部１と挿入管部２との相対回転を阻止する回転防止機能も発揮させることができるから、特に、配管系の途中に空気弁や消火栓等の機器が接続されていて、それらの機器を特定の姿勢に維持しなければならない場合でも、機器の特定姿勢を維持するための特別な回転防止用の支持工事が不要で、管接続工事費の低廉化を図ることができる。
しかしながら、従来では、前記抜止部材５０の内側面に、互いに方向の異なる第1 喰込み突起部５０Ａと第２喰込み突起部５０Ｂとが形成されているため、例えば、鋳造で製作された抜止部材５０の第1 喰込み突起部５０Ａ及び第２喰込み突起部５０Ｂを切削加工する場合に手間取り易く、特に、第1 喰込み突起部５０Ａと第２喰込み突起部５０Ｂとが連続又は近接する場合では、切削加工に多くの手間を要する問題があった。
【０００４】
本発明は、上述の実状に鑑みて為されたものであって、その主たる課題は、抜止部材に対する合理的な改造をもって、優れた離脱防止機能と回転防止機能とを確実に発揮させながら能率良く容易に製作することのできる管継手部の離脱防止装置を提供する点にある。
【０００５】
【課題を解決するための手段】
本発明の構成は、受口管部に挿入接続された挿入管部の外周面と、該挿入管部に外装する状態で前記受口管部に管軸芯方向から固定連結される押輪の内周面との間に、挿入管部の外周面に喰い込み可能な抜止部材を設けるとともに、前記抜止部材を挿入管部の外周面に押圧する押圧手段を設けてある管継手部の離脱防止装置であって、
前記抜止部材の内側面に、管周方向の成分が主体となる方向に沿って挿入管部の外周面に喰い込み可能な第１喰込み突起部を形成するとともに、前記抜止部材に、管軸芯方向の成分を含む方向に沿って挿入管部の外周面に喰い込み可能な第２喰込み突起部を備えた廻り止め部材を設けていてもよい。
【０００６】
上記構成によれば、前記押圧手段によって抜止部材を挿入管部の外周面側に押圧すると、第１喰込み突起部及び第２喰込み突起部が挿入管部の外周面に喰い込み、管周方向の成分が主体となる方向に沿う第１喰込み突起部をもって、接続された受口管部と挿入管部との管軸芯方向での相対移動を阻止する離脱防止機能を発揮させることができるとともに、管軸芯方向の成分を含む方向に沿う第２喰込み突起部をもって、受口管部と挿入管部との相対回転を阻止する回転防止機能も発揮させることができる。
しかも、前記第１喰込み突起部は抜止部材の内側面に形成され、かつ、第２喰込み突起部は、抜止部材に設けられる廻り止め部材に形成されているから、一方の第１喰込み突起部又は第２喰込み突起部が他方の第２喰込み突起部又は第１喰込み突起部に対する加工の妨げになることがない。
従って、第２喰込み突起部を備えた廻り止め部材を抜止部材に設けるだけの簡単かつ安価な改造をもって、優れた離脱防止機能と回転防止機能とを確実に発揮させながら能率良く容易に製作することができる。
【０００７】
本発明の構成は、前記廻り止め部材が、抜止部材に対して脱着自在に構成されていてもよい。
上記構成によれば、配管系の途中に空気弁や消火栓等の機器が接続されていて、それらの機器を特定の姿勢に維持する必要のある場合では、第１喰込み突起部を備えた抜止部材に、第２喰込み突起部を備えた廻り止め部材を取付けることにより、接続された受口管部と挿入管部との管軸芯方向での相対離脱移動及び相対回転を共に阻止して、機器を特定の姿勢に維持することができる。
また、地中等に埋設される配管系で、かつ、不同沈下や地震等に起因して回転力や捻じれ力等の管周方向の外力が作用する場合では、第１喰込み突起部を備えた抜止部材から第２喰込み突起部を備えた廻り止め部材を取外すことにより、接続された受口管部と挿入管部との相対離脱移動を防止しながらも、受口管部と挿入管部との相対回転によって管周方向の外力を吸収することができる。
従って、第１喰込み突起部を備えた抜止部材に対して、第２喰込み突起部を備えた廻り止め部材を脱着するだけの簡単な操作をもって、離脱防止機能と回転防止機能とを備えたものと、離脱防止機能のみを備えたものとに使い分けることができる。
【０００８】
本発明の構成は、前記抜止部材と廻り止め部材との間に、抜止部材の内側面からの第２喰込み突起部の突出代を調節する調節手段が設けられている点にある。
上記構成によれば、前記抜止部材と廻り止め部材との間に設けた調節手段によって、抜止部材の内側面からの第２喰込み突起部の突出代を自由に調節することができるから、挿入管部や抜止部材の材質や各喰込み突起部の形状等の条件に応じた回転防止力を得ることができる。
【０００９】
本発明の構成は、前記第２喰込み突起部が、管軸芯方向の成分と管周方向の成分とを含む方向に沿って円環状に形成されていてもよい。
上記構成によれば、前記第２喰込み突起部をもって離脱防止機能と回転防止機能とを発揮させることができるばかりでなく、第２喰込み突起部の切削加工も能率良く容易に行うことができる。
【００１０】
本発明の構成は、前記調節手段が、抜止部材に貫通形成された取付け孔の雌ネジと、廻り止め部材の外周面に形成された雄ネジとから構成されていてもよい。
上記構成によれば、抜止部材に廻り止め部材を脱着自在に取付けるためのネジを利用して、調節手段を製造コスト面で有利に製作することができる。
【００１１】
本発明の構成は、前記押輪の内周面で、かつ、管周方向に所定間隔を隔てた複数箇所に、抜止部材を脱着自在に装着する凹部を形成するとともに、前記凹部に装着される抜止部材の少なくとも一つに、前記廻り止め部材が設けられていてもよい。
上記構成によれば、押輪の複数の凹部内に装着される抜止部材として、廻り止め部材が設けられているものと、廻り止め部材が設けられていないものを適宜選択することができるから、使用条件に応じた最も適切な離脱防止力及び回転防止力に簡便に変更することができる。
本発明の請求項１による管継手部の離脱防止装置の特徴構成は、受口管部に挿入接続された挿入管部の外周面と、該挿入管部に外装する状態で前記受口管部に管軸芯方向から固定連結される押輪の内周面との間に、挿入管部の外周面に喰い込み可能な抜止部材を設けるとともに、前記抜止部材を挿入管部の外周面に押圧する押圧手段を設けてある管継手部の離脱防止装置であって、
前記抜止部材の内側面に、管周方向の成分が主体となる方向に沿って挿入管部の外周面に喰い込み可能な第１喰込み突起部を形成するとともに、前記抜止部材に、管軸芯方向の成分を含む方向に沿って挿入管部の外周面に喰い込み可能な第２喰込み突起部を備えた廻り止め部材を設けてあり、
前記廻り止め部材が、抜止部材に対して脱着自在に構成されている点にある。
本発明の請求項２による管継手部の離脱防止装置の特徴構成は、前記抜止部材と廻り止め部材との間に、抜止部材の内側面からの第２喰込み突起部の突出代を調節する調節手段が設けられている点にある。
本発明の請求項３による管継手部の離脱防止装置の特徴構成は、前記調節手段が、抜止部材に貫通形成された取付け孔の雌ネジと、廻り止め部材の外周面に形成された雄ネジとから構成されている点にある。
本発明の請求項４による管継手部の離脱防止装置の特徴構成は、受口管部に挿入接続された挿入管部の外周面と、該挿入管部に外装する状態で前記受口管部に管軸芯方向から固定連結される押輪の内周面との間に、挿入管部の外周面に喰い込み可能な抜止部材を設けるとともに、前記抜止部材を挿入管部の外周面に押圧する押圧手段を設けてある管継手部の離脱防止装置であって、
前記抜止部材の内側面に、管周方向の成分が主体となる方向に沿って挿入管部の外周面に喰い込み可能な第１喰込み突起部を形成するとともに、前記抜止部材に、管軸芯方向の成分を含む方向に沿って挿入管部の外周面に喰い込み可能な第２喰込み突起部を備えた廻り止め部材を設けてあり、
前記抜止部材と廻り止め部材との間に、抜止部材の内側面からの第２喰込み突起部の突出代を調節する調節手段が設けられている点にある。
本発明の請求項５による管継手部の離脱防止装置の特徴構成は、前記調節手段が、抜止部材に貫通形成された取付け孔の雌ネジと、廻り止め部材の外周面に形成された雄ネジとから構成されている点にある。
本発明の請求項６による管継手部の離脱防止装置の特徴構成は、前記第２喰込み突起部が、管軸芯方向の成分と管周方向の成分とを含む方向に沿って円環状に形成されている点にある。
本発明の請求項７による管継手部の離脱防止装置の特徴構成は、受口管部に挿入接続された挿入管部の外周面と、該挿入管部に外装する状態で前記受口管部に管軸芯方向から固定連結される押輪の内周面との間に、挿入管部の外周面に喰い込み可能な抜止部材を設けるとともに、前記抜止部材を挿入管部の外周面に押圧する押圧手段を設けてある管継手部の離脱防止装置であって、
前記抜止部材の内側面に、管周方向の成分が主体となる方向に沿って挿入管部の外周面に喰い込み可能な第１喰込み突起部を形成するとともに、前記抜止部材に、管軸芯方向の成分を含む方向に沿って挿入管部の外周面に喰い込み可能な第２喰込み突起部を備えた廻り止め部材を設けてあり、
前記第２喰込み突起部が、管軸芯方向の成分と管周方向の成分とを含む方向に沿って円環状に形成されている点にある。
本発明の請求項８による管継手部の離脱防止装置の特徴構成は、前記押輪の内周面で、かつ、管周方向に所定間隔を隔てた複数箇所に、抜止部材を脱着自在に装着する凹部を形成するとともに、前記凹部に装着される抜止部材の少なくとも一つに、前記廻り止め部材が設けられている点にある。
【００１２】
【発明の実施の形態】
〔第１実施形態〕
図１〜図７は、流体輸送管（例えば、水道管やガス管）の管継手部の離脱防止装置を示し、一方の流体輸送管Ｐの受口管部１に挿入接続された他方の流体輸送管Ｐの挿入管部２に、前記受口管部１の内周面１ｃと挿入管部２の外周面２ａとの間を密封可能な合成ゴム製（例えば、スチレンブタジエンゴム）のシール材３と、該シール材３を管軸芯Ｘ方向から押圧して密封状態（水密状態）にまで圧縮可能な鋳鉄製の押輪４とが外装されているとともに、前記押輪４と受口管部１とを管軸芯Ｘ方向から締付け固定する締結手段５が設けられている。
【００１３】
前記締結手段５は、受口管部１の連結フランジ部１ａの管周方向複数箇所に形成されたボルト挿通孔１ｂ、及び、押輪４の第1 連結フランジ部４ａの管周方向複数箇所に形成されたボルト挿通孔４ｂとのうち、管軸芯方向で相対向するボルト挿通孔１ｂ、４ｂに亘って挿入されるＴ字状のボルト5 Ａと、該ボルト5 Ａの突出ネジ部に螺合されるナット５Ｂとから構成されていて、前記ボルト5 Ａ・ナット５Ｂの締付け操作に伴う押輪４と受口管部１との管軸芯Ｘ方向での相対近接移動により、押輪４の管軸芯Ｘ方向の一端部に形成されたシール押圧部４ｃでシール材３を圧縮変形させ、受口管部１の内周面１ｃと挿入管部２の外周面２ａとの間を密封する。
【００１４】
前記押輪４は、管周方向で二分割された一対の分割押輪体４Ａから構成されていて、各分割押輪体４Ａの管周方向両端部には、ボルト6 ・ナット７等の締結手段を介して互いに固定連結するための第2 連結フランジ部４ｄが一体形成されているとともに、各分割押輪体４Ａの内周面の管周方向複数箇所には、挿入管部２の外周面２ａに喰い込み可能な抜止部材８を管径方向に移動自在に装着可能な凹部９が形成され、更に、前記各凹部９内に装着された抜止部材８を挿入管部２の外周面２ａに押圧する押圧手段Ａと、前記受口管部１と挿入管部２との管軸芯Ｘ方向での相対離脱移動に連れて抜止部材８を管径方向内方に変位させるカム手段Ｂとが設けられている。
【００１５】
前記押圧手段Ａは、分割押輪体４Ａの各凹部９に対応する部位に、凹部９内に装着された抜止部材８の外側面８ａに対する垂直方向に沿って貫通するネジ孔１０を形成するとともに、各ネジ孔１０には、凹部９内に装着された抜止部材８の外側面８ａを管径方向内方側に押圧する押ボルト１１を脱着自在に螺合して構成されている。
【００１６】
前記抜止部材８の外側面８ａは、挿入管部２の先端側ほど該挿入管部２の外周面２ａから離間するテーパー状の傾斜面に形成されているとともに、前記押ボルト１１の先端面１１ａは、抜止部材８の傾斜外側面８ａと平行又はほぼ平行な偏平状のカム面に形成されていて、前記抜止部材８の傾斜外側面８ａと押ボルト１１のカム面１１ａとをもって、前記受口管部１と挿入管部２との管軸芯Ｘ方向での相対離脱移動に連れて抜止部材８を更に喰込み側に移動させる前記のカム手段Ｂが構成されている。
【００１７】
そして、前記抜止部材８の内側面８ｂで、かつ、管軸芯Ｘ方向の両端部近くには、管周方向に沿って挿入管部２の外周面２ａに喰い込み可能な第1 喰込み突起部８Ａが一体形成されているとともに、前記抜止部材８には、少なくとも管軸芯Ｘ方向の成分を含む方向に沿って挿入管部２の外周面２ａに喰い込み可能な第２喰込み突起部１２Ａを一体形成してある円柱状の金属製（例えば、クロムモリブデン鋼等）の廻り止め部材１２が脱着自在に設けられ、更に、前記抜止部材８と廻り止め部材１２との間には、抜止部材８の内側面８ｂからの第２喰込み突起部１２の突出代を調節する調節手段Ｃが設けられている。
【００１８】
前記第1 喰込み突起部８Ａの横断面形状、及び、第２喰込み突起部１２Ａの横断面形はそれぞれ、先鋭な三角形状に形成されているとともに、前記第２喰込み突起部１２Ａは、管軸芯Ｘ方向の成分と管周方向の成分とを含む方向に沿って円環状に形成されている。
【００１９】
前記調節手段Ｃは、押ボルト１１のボルト軸芯方向に沿って抜止部材８に貫通形成された取付け孔の雌ネジ８ｃと、廻り止め材１２の外周面に形成された雄ネジ１２ａとから構成されていて、抜止部材８の雌ネジ８ｃに対して廻り止め材１２の雄ネジ１２ａを螺合操作することにより、抜止部材８の内側面８ｂからの第２喰込み突起部１２の突出代を調節することができる。
また、前記廻り止め材１２の他端部には、該廻り止め材１２を工具で回転操作するための六角形状の操作孔１２ｂが形成されている。
【００２０】
前記各抜止部材８の管周方向の両側面には、これに対応する凹部９の側壁部に形成された係止孔１５に対して管周方向から係合して、抜止部材８を凹部９内の所定装着位置に仮止め保持するゴムや合成樹脂製の仮止め部材１６の取付け孔１７が形成されている。
【００２１】
前記仮止め部材１６は、押ボルト１１の螺合操作によって凹部９内の抜止部材８に管径方向内方への押圧力が付与されたとき、或いは、受口管部１と挿入管部２との管軸芯Ｘ方向での相対離脱移動に連れて抜止部材８に喰込み側への押圧力が付与されたとき、該抜止部材８の管径方向内方への強制移動を許容するように構成されている。
【００２２】
そして、前記押圧手段Ａの押ボルト１１の締付け側への螺合操作によって、凹部９内に装着された抜止部材８を挿入管部２の外周面２ａ側に押圧すると、抜止部材８に一体形成された両第1 喰込み突起部８Ａ、及び、廻り止め部材１２の先端部に一体形成された第２喰込み突起部１２Ａが挿入管部２の外周面２ａに喰い込み、管周方向に沿って長い（又は管周方向の成分が主体となる方向に沿って長い）両第1 喰込み突起部８Ａをもって、接続された受口管部１と挿入管部２との管軸芯Ｘ方向での相対移動を阻止する離脱防止機能を発揮させることができるとともに、少なくとも管軸芯Ｘ方向の成分を含む方向に沿って長い（又は管軸芯Ｘ方向にのみに沿って長い）第２喰込み突起部１２Ａをもって、受口管部１と挿入管部２との相対回転を阻止する回転防止機能も発揮させることができる。
【００２３】
また、図７に示すように、配管系の途中に空気弁２０や消火栓等の機器が接続されていて、それらの機器を特定の姿勢に維持する必要のある場合では、第1 喰込み突起部８Ａを備えた抜止部材８に、第２喰込み突起部１２Ａを備えた廻り止め部材１２を取付けることにより、連通接続された一方の流体輸送管Ｐの受口管部１と他方の流体輸送管Ｐの挿入管部２との管軸芯Ｘ方向での相対離脱移動及び相対回転を共に阻止して、機器を特定の姿勢に維持することができる。
【００２４】
また、地中等に埋設される配管系で、かつ、不同沈下や地震等に起因して回転力や捻じれ力等の管周方向の外力が作用する場合では、第1 喰込み突起部８Ａを備えた抜止部材８から第２喰込み突起部１２Ａを備えた廻り止め部材１２を取外すことにより、連通接続された一方の流体輸送管Ｐの受口管部１と他方の流体輸送管Ｐの挿入管部２との相対離脱移動を確実に防止しながらも、受口管部１と挿入管部２との相対回転によって管周方向の外力を吸収することができる。
【００２５】
従って、第1 喰込み突起部８Ａを備えた抜止部材８に対して、第２喰込み突起部１２Ａを備えた廻り止め部材１２を脱着するだけの簡単な操作をもって、離脱防止機能と回転防止機能とを備えたものと、離脱防止機能のみを備えたものとに使い分けることができる。
【００２６】
また、前記押輪４の各凹部９に保持される抜止部材８の全てに廻り止め部材１２を設ける必要がなく、少なくとも一つの抜止部材８に、前記廻り止め部材１２が設けられていればよい。
【００２７】
更に、前記押輪４の複数の凹部９内に装着される抜止部材８として、廻り止め部材１２が設けられているものと、廻り止め部材１２が設けられていないものを適宜選択することができるから、使用条件に応じた最も適切な離脱防止力及び回転防止力に簡便に変更することができる。
【００２８】
〔第２実施形態〕
上述の第1 実施形態では、第1 喰込み突起部８Ａを備えた抜止部材８に対して、第２喰込み突起部１２Ａを備えた廻り止め部材１２を脱着自在に螺合すると共に、前記第２喰込み突起部１２Ａを、管軸芯Ｘ方向の成分と管周方向の成分とを含む方向に沿って円環状に形成したが、図８、図９に示すように、前記第1 喰込み突起部８Ａを備えた抜止部材８に、管軸芯Ｘ方向に沿って挿入管部２の外周面２ａに喰い込み可能な直線状の第２喰込み突起部１２Ａを備えた角柱状の廻り止め部材１２を回転不能な状態で嵌合保持する角状の第1 取付け孔８ｄと、該第1 取付け孔８ｄ内に嵌合保持された第２喰込み突起部１２Ａを抜止部材８に締付け固定するボルト２１を管径方向外方側から装着するための第２取付け孔８ｅとを連通形成してもよい。
尚、その他の構成は、第１実施形態で説明した構成と同一であるから、同一の構成箇所には、第１実施形態と同一の番号を付記してそれの説明は省略する。
【００２９】
〔その他の実施形態〕
（１）上述の各実施例では、前記受口管部１と挿入管部２との管軸芯Ｘ方向での相対離脱移動に連れて抜止部材８を管径方向内方に変位させるカム手段Ｂを設けたが、このようなカム手段Ｂを備えていない管継手部の離脱防止装置に本発明の技術を適用して実施してもよい。
つまり、前記各凹部９内に装着された抜止部材８を挿入管部２の外周面２ａに押圧する押圧手段Ａのみを備えた管継手部の離脱防止装置に本発明の技術を適用してもよい。
【００３０】
（２）上述の各実施例では、前記抜止部材８の第1 喰込み突起部８Ａを、管周方向に沿って長く形成したが、該第1 喰込み突起部８Ａを管周方向に対して交差する方向に沿って長く形成してもよい。
要するに、前記抜止部材８の第1 喰込み突起部８Ａとしては、連続又は断続のいずれであってもよいが、結果的に管周方向の成分が主体となる方向に沿って長いものであればよい。
また、前記第1 喰込み突起部８Ａの数は一本でも、上述実施例のような二本でも、更に、三本であつてもよい。
【００３１】
（３）上述の第１実施例では、前記第２喰込み突起部１２Ａを、管軸芯Ｘ方向の成分と管周方向の成分とを含む方向に沿って円環状に形成し、また、第２実施例では、前記第２喰込み突起部１２Ａを、管軸芯Ｘ方向に沿って一直線状に形成したが、前記第２喰込み突起部１２Ａを管軸芯Ｘ方向に対して交差する方向に沿って一直線状又は彎曲形成してもよい。
要するに、前記第２喰込み突起部１２Ａとしては、連続又は断続のいずれであってもよいが、結果的に少なくとも管軸芯Ｘ方向の成分を含む方向に沿って長いものであればよい。
【００３２】
（４）前記第1 喰込み突起部８Ａ及び第２喰込み突起部１２Ａの各先端を波形、或いは、その長手方向の一端側ほど突出量が大となる傾斜形状等に形成して実施してもよい。
【００３３】
（５）前記第1 喰込み突起部８Ａを備えた抜止部材８に対して、第２喰込み突起部１２Ａを備えた廻り止め部材１２を脱着自在に構成するにあたって、上述の各実施例ではネジ方式を採用したが、このようなネジ方式の代わりに嵌合方式で脱着自在に構成してもよい。
【００３４】
（６）前記第1 喰込み突起部８Ａを備えた抜止部材８と、第２喰込み突起部１２Ａを備えた廻り止め部材１２とを各別に製作した後、廻り止め部材１２を抜止部材８に適宜固着手段で固着して実施してもよい。
【図面の簡単な説明】
【図１】本発明の第1 実施形態を示す管継手部の離脱防止装置の断面側面図
【図２】断面正面図
【図３】要部の拡大一部切欠き正面図
【図４】要部の拡大断面側面図
【図５】抜止部材及び廻り止め部材の拡大分解斜視図
【図６】抜止部材及び廻り止め部材の拡大内側面図
【図７】配管系の一例を示す側面図
【図８】本発明の第２実施形態を示す管継手部の離脱防止装置の拡大一部切欠き正面図
【図９】抜止部材及び廻り止め部材の拡大内側面図
【図１０】従来の管継手部の離脱防止装置を示す断面側面図
【図１１】抜止部材の斜視図
【符号の説明】
Ａ押圧手段
Ｃ調節手段
Ｘ管軸芯
１受口管部
２挿入管部
２ａ外周面
４押輪
８抜止部材
８Ａ第1 喰込み突起部
８ｃ雌ネジ
１２廻り止め部材
１２Ａ第２喰込み突起部
１２ａ雄ネジ[0001]
BACKGROUND OF THE INVENTION
The present invention provides an outer peripheral surface of an insertion tube portion inserted and connected to the receiving tube portion, and an inner peripheral surface of a press ring fixedly connected to the receiving tube portion from the tube axis direction in a state of covering the insertion tube portion. In addition, the present invention relates to an apparatus for preventing separation of a pipe joint portion provided with a retaining member capable of biting into the outer peripheral surface of the insertion tube portion and a pressing means for pressing the retaining member against the outer peripheral surface of the insertion tube portion.
[0002]
[Prior art]
As shown in FIGS. 10 and 11, as this type of pipe joint detachment preventing device, a recess 9 is provided on the inner peripheral surface of the pusher wheel 4 so that a retaining member 50 can be detachably attached from the inside in the radial direction of the pipe. The bolt 11 constituting the pressing means A for applying a pressing force inward in the pipe radial direction to the retaining member 50 in the recess 9 is screwed from the outer peripheral surface side of the presser wheel 4. With the flat cam surface 11a formed at the tip of the bolt 11 and the inclined outer surface 50a of the retaining member 50, the receiving pipe part 1 and the insertion pipe part 2 are relatively separated in the tube axis X direction. Accordingly, the cam means B for displacing the retaining member 50 inward in the pipe radial direction is configured, and the inner surface 50b of the retaining member 50 is bitten by the outer peripheral surface 2a of the insertion tube portion 2 along the pipe circumferential direction. Two first biting protrusions 50A that can be inserted, and the insertion tube portion 2 along the tube axis X direction There has been proposed one in which one second biting protrusion 50B that can bite into the outer peripheral surface 2a is integrally formed in a state of being arranged in a substantially square shape (for example, JP-A-7-280147). (See publication)
[0003]
[Problems to be solved by the invention]
In the conventional apparatus for preventing disconnection of a pipe joint, when a bolt that constitutes the pressing means A is tightened to apply a pressing force inward in the pipe radial direction to the retaining member 50, the inner surface of the retaining member 50 is applied. The formed first biting protrusion 50A and the second biting protrusion 50B bite into the outer peripheral surface 2a of the insertion pipe part 2, and the tube axis X of the connected receiving pipe part 1 and insertion pipe part 2 In addition to being able to exhibit a separation preventing function that inhibits relative movement in the direction, it is also possible to exhibit a rotation preventing function that inhibits relative rotation between the receiving tube portion 1 and the insertion tube portion 2. Even when devices such as air valves and fire hydrants are connected in the middle of the piping system and these devices must be maintained in a specific posture, special anti-rotation measures are required to maintain the specific posture of the device. Support work is not required, and pipe connection work costs can be reduced. Kill.
However, conventionally, since the first biting protrusion 50A and the second biting protrusion 50B having different directions are formed on the inner surface of the retaining member 50, for example, the retaining member manufactured by casting. When the 50 first biting projections 50A and the second biting projections 50B are cut, it is easy to take time, especially when the first biting projections 50A and the second biting projections 50B are continuous or close to each other. However, there is a problem that requires a lot of labor for cutting.
[0004]
The present invention has been made in view of the above-described actual situation, and the main problem is that it is efficiently performed with a reasonable modification to the retaining member while reliably exhibiting an excellent separation prevention function and rotation prevention function. An object of the present invention is to provide an apparatus for preventing separation of a pipe joint that can be easily manufactured.
[0005]
[Means for Solving the Problems]
The configuration of the present invention includes an outer peripheral surface of an insertion tube portion that is inserted and connected to the receiving tube portion, and an inner part of a press ring that is fixedly connected to the receiving tube portion from the tube axis direction in a state of being sheathed on the insertion tube portion. An anti-separation device for a pipe joint portion provided with a retaining member that can be inserted into the outer peripheral surface of the insertion tube portion and a pressing means for pressing the retaining member against the outer peripheral surface of the insertion tube portion. Because
Formed on the inner surface of the retaining member is a first biting projection that can bite into the outer peripheral surface of the insertion tube portion along a direction in which the component in the tube circumferential direction is the main component. A detent member provided with a second biting projection that can bite into the outer peripheral surface of the insertion tube along the direction including the component in the core direction may be provided .
[0006]
According to the above configuration, when the retaining member is pressed against the outer peripheral surface side of the insertion tube portion by the pressing means, the first biting projection portion and the second biting projection portion bite into the outer peripheral surface of the insertion tube portion, The first biting protrusion along the direction in which the direction component is the main component, and exhibiting a separation preventing function that prevents the relative movement of the connected receiving tube portion and insertion tube portion in the tube axis direction. In addition, the second anti-rotation function of preventing the relative rotation between the receiving tube portion and the insertion tube portion can be exhibited by having the second biting protrusion along the direction including the component in the tube axis direction.
In addition, the first biting projection is formed on the inner surface of the retaining member, and the second biting projection is formed on the anti-rotation member provided on the retaining member. The protrusion or the second biting protrusion does not hinder the processing of the other second biting protrusion or the first biting protrusion.
Therefore, with a simple and inexpensive modification that simply provides a detent member with a second biting projection on the retaining member, it can be manufactured efficiently and easily while ensuring excellent separation prevention and anti-rotation functions. be able to.
[0007]
In the configuration of the present invention, the detent member may be configured to be detachable from the retaining member .
According to the above configuration, when equipment such as an air valve or a fire hydrant is connected in the middle of the piping system and it is necessary to maintain the equipment in a specific posture, the stopper provided with the first biting protrusion By attaching a detent member with a second biting protrusion to the member, it is possible to prevent both relative separation movement and relative rotation in the tube axis direction between the connected receiving tube portion and insertion tube portion. , The device can be maintained in a specific posture.
In addition, when the piping system is buried in the ground and external force in the circumferential direction such as rotational force or torsional force is applied due to uneven settlement, earthquake, etc., the first biting protrusion is provided. By removing the anti-rotation member having the second biting protrusion from the retaining member, it is possible to prevent the relative separation movement between the connected receiving tube portion and the inserting tube portion, but the receiving tube portion and the inserting tube. The external force in the pipe circumferential direction can be absorbed by the relative rotation with the section.
Therefore, with respect to the retaining member provided with the first biting projection, it is provided with an anti-separation function and an anti-rotation function with a simple operation of simply removing the detent member provided with the second biting projection. Can be used separately, and those with only a function to prevent separation.
[0008]
The structure of this invention exists in the point by which the adjustment means which adjusts the protrusion margin of the 2nd biting projection part from the inner surface of a retaining member is provided between the said retaining member and the rotation preventing member.
According to the above configuration , the adjustment margin provided between the retaining member and the anti-rotation member can freely adjust the protrusion margin of the second biting projection from the inner surface of the retaining member. An anti-rotation force can be obtained in accordance with conditions such as the material of the pipe part and the retaining member and the shape of each biting protrusion.
[0009]
In the configuration of the present invention, the second biting protrusion may be formed in an annular shape along a direction including a component in the tube axis direction and a component in the tube circumferential direction .
According to the above configuration , not only can the second biting protrusion be able to exhibit the separation prevention function and the rotation prevention function, but also the second biting protrusion can be cut efficiently and easily. .
[0010]
Configuration of the present invention, the adjusting means includes a female screw mounting holes formed through the stop member, or may be composed of a male screw formed on the outer circumferential surface of the anti-rotation member.
According to the above configuration, it is possible to use a screw for mounting detachably the detent member in the retaining member, advantageously fabricated adjustment means in manufacturing cost.
[0011]
According to the configuration of the present invention , a recess for removably mounting a retaining member is formed at a plurality of locations on the inner peripheral surface of the push wheel and at a predetermined interval in the pipe circumferential direction. At least one of the members may be provided with the anti-rotation member .
According to the above configuration , as the retaining member to be mounted in the plurality of recesses of the push wheel, a member provided with a non-rotating member and a member not provided with a rotating member can be appropriately selected. It is possible to easily change to the most appropriate detachment prevention force and rotation prevention force according to the conditions.
According to a first aspect of the present invention, there is provided a pipe joint part detachment preventing device characterized in that an outer peripheral surface of an insertion pipe part inserted and connected to the reception pipe part, and the outlet pipe part in a state of being externally mounted on the insertion pipe part. Is provided with a retaining member that can bite into the outer peripheral surface of the insertion tube portion between the inner peripheral surface of the press ring fixedly connected to the tube shaft from the tube axis direction and presses the retaining member against the outer peripheral surface of the insertion tube portion. A separation preventing device for a pipe joint portion provided with a pressing means,
Formed on the inner surface of the retaining member is a first biting projection that can bite into the outer peripheral surface of the insertion tube portion along a direction in which the component in the tube circumferential direction is the main component. A detent member provided with a second biting projection that can bite into the outer peripheral surface of the insertion tube along the direction including the component in the core direction;
The anti-rotation member is configured to be detachable with respect to the retaining member .
According to a second aspect of the present invention, there is provided a pipe joint portion disengagement prevention device that adjusts a projection margin of the second biting projection from the inner surface of the retaining member between the retaining member and the rotation preventing member. The adjustment means is provided.
According to a third aspect of the present invention, there is provided a pipe joint part detachment preventing device characterized in that the adjusting means includes a female screw of a mounting hole formed through the retaining member and a male screw formed on the outer peripheral surface of the locking member. It is composed of
According to a fourth aspect of the present invention, there is provided a characteristic configuration of the pipe joint portion detachment preventing device, wherein the receiving pipe portion is provided in an outer peripheral surface of the insertion pipe portion inserted and connected to the receiving pipe portion and externally attached to the insertion pipe portion. Is provided with a retaining member that can bite into the outer peripheral surface of the insertion tube portion between the inner peripheral surface of the press ring fixedly connected to the tube shaft from the tube axis direction and presses the retaining member against the outer peripheral surface of the insertion tube portion. A separation preventing device for a pipe joint portion provided with a pressing means,
Formed on the inner surface of the retaining member is a first biting projection that can bite into the outer peripheral surface of the insertion tube portion along a direction in which the component in the tube circumferential direction is the main component. A detent member provided with a second biting projection that can bite into the outer peripheral surface of the insertion tube along the direction including the component in the core direction;
An adjusting means for adjusting a protrusion margin of the second biting protrusion from the inner surface of the retaining member is provided between the retaining member and the rotation preventing member.
According to a fifth aspect of the present invention, there is provided a pipe joint part detachment preventing device characterized in that the adjusting means includes a female screw of a mounting hole formed through the retaining member and a male screw formed on the outer peripheral surface of the locking member. It is composed of
According to a sixth aspect of the present invention, there is provided the characteristic structure of the pipe joint portion detachment preventing device, wherein the second biting projection is annular in a direction including a component in the tube axis direction and a component in the tube circumferential direction. It is in a formed point.
According to a seventh aspect of the present invention, there is provided a characteristic configuration of the pipe joint portion detachment preventing device, wherein the receiving pipe portion is provided in an outer peripheral surface of the insertion pipe portion inserted and connected to the receiving pipe portion and externally attached to the insertion pipe portion. Is provided with a retaining member that can bite into the outer peripheral surface of the insertion tube portion between the inner peripheral surface of the press ring fixedly connected to the tube shaft from the tube axis direction and presses the retaining member against the outer peripheral surface of the insertion tube portion. A separation preventing device for a pipe joint portion provided with a pressing means,
Formed on the inner surface of the retaining member is a first biting projection that can bite into the outer peripheral surface of the insertion tube portion along a direction in which the component in the tube circumferential direction is the main component. A detent member provided with a second biting projection that can bite into the outer peripheral surface of the insertion tube along the direction including the component in the core direction;
The second biting protrusion is formed in an annular shape along a direction including a component in the tube axis direction and a component in the tube circumferential direction.
According to the eighth aspect of the present invention, there is provided a characteristic feature of the pipe joint portion detachment preventing device, wherein the retaining member is detachably attached to the inner peripheral surface of the pusher wheel and at a plurality of positions spaced apart in the pipe circumferential direction. While forming a recessed part, it exists in the point by which the said rotation prevention member is provided in at least one of the securing members with which the said recessed part is mounted | worn.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
[First Embodiment]
1 to 7 show an apparatus for preventing separation of a pipe joint portion of a fluid transport pipe (for example, a water pipe or a gas pipe), and the other fluid inserted and connected to the receiving pipe portion 1 of one fluid transport pipe P. A sealing material made of synthetic rubber (for example, styrene butadiene rubber) capable of sealing between the inner peripheral surface 1c of the receiving tube portion 1 and the outer peripheral surface 2a of the insertion tube portion 2 on the insertion tube portion 2 of the transport pipe P. 3 and a cast iron push ring 4 that can be compressed to a sealed state (watertight state) by pressing the seal material 3 from the tube axis X direction, and the push ring 4 and the receiving pipe portion 1. Fastening means 5 is provided to fasten and fix them from the direction of the tube axis X.
[0013]
The fastening means 5 is formed at bolt insertion holes 1b formed at a plurality of locations in the pipe circumferential direction of the connection flange portion 1a of the receiving pipe portion 1 and at a plurality of locations in the pipe circumferential direction of the first connection flange portion 4a of the press ring 4. Among the bolt insertion holes 4b, the T-shaped bolt 5A inserted over the bolt insertion holes 1b and 4b facing each other in the tube axis direction, and screwed into the protruding screw portion of the bolt 5A And the tube shaft of the pusher wheel 4 by the relative proximity movement of the pusher wheel 4 and the receiving pipe part 1 in the tube axis X direction accompanying the tightening operation of the bolt 5A and the nut 5B. The sealing material 3 is compressed and deformed by the seal pressing portion 4 c formed at one end portion in the core X direction, and the space between the inner peripheral surface 1 c of the receiving tube portion 1 and the outer peripheral surface 2 a of the insertion tube portion 2 is sealed.
[0014]
The pusher wheel 4 is composed of a pair of divided pusher bodies 4A divided into two in the pipe circumferential direction, and bolts 6 and nuts 7 are connected to both ends of the divided pusher wheel bodies 4A in the pipe circumferential direction. The second connecting flange portions 4d for fixedly connecting each other are integrally formed, and the outer peripheral surface 2a of the insertion tube portion 2 is bitten into a plurality of locations in the tube peripheral direction of the inner peripheral surface of each divided pusher body 4A. A recessed portion 9 is formed in which the possible retaining member 8 is movably mounted in the radial direction of the tube, and further, a pressing means for pressing the retaining member 8 mounted in each recessed portion 9 against the outer peripheral surface 2a of the insertion tube portion 2. A and cam means B are provided for displacing the retaining member 8 inward in the radial direction of the tube in accordance with the relative detachment movement of the receiving tube portion 1 and the insertion tube portion 2 in the tube axis X direction. .
[0015]
The pressing means A is formed with screw holes 10 penetrating along a direction perpendicular to the outer surface 8a of the retaining member 8 mounted in the recess 9 at a portion corresponding to each recess 9 of the divided push ring body 4A. Each screw hole 10 is configured to be detachably screwed with a push bolt 11 that presses the outer surface 8a of the retaining member 8 mounted in the recess 9 inward in the tube radial direction.
[0016]
The outer surface 8a of the retaining member 8 is formed in a tapered inclined surface that is separated from the outer peripheral surface 2a of the insertion tube portion 2 toward the distal end side of the insertion tube portion 2, and the distal end surface 11a of the push bolt 11 Is formed on a flat cam surface that is parallel or substantially parallel to the inclined outer surface 8a of the retaining member 8, and includes the inclined outer surface 8a of the retaining member 8 and the cam surface 11a of the push bolt 11 in the receiving port. The cam means B is configured to move the retaining member 8 further toward the biting side in accordance with the relative separation movement of the tube portion 1 and the insertion tube portion 2 in the tube axis X direction.
[0017]
And the 1st biting protrusion which can bite into the outer peripheral surface 2a of the insertion pipe part 2 along the pipe | tube circumferential direction is the inner side surface 8b of the said retaining member 8 and near the both ends of the pipe axis X direction. 8A is integrally formed, and the retaining member 8 has a second biting protrusion that can bite into the outer peripheral surface 2a of the insertion tube portion 2 along a direction including at least a component in the tube axis X direction. A cylindrical metal (for example, chrome molybdenum steel) 12 that is integrally formed with a rotation preventing member 12 is detachably provided. Further, a retaining member is provided between the retaining member 8 and the retaining member 12. An adjusting means C for adjusting the protrusion margin of the second biting protrusion 12 from the inner side surface 8b of the member 8 is provided.
[0018]
While the cross-sectional shape of the first biting projection 8A and the cross-sectional shape of the second biting projection 12A are each formed in a sharp triangular shape, the second biting projection 12A is It is formed in an annular shape along a direction including a component in the tube axis X direction and a component in the tube circumferential direction.
[0019]
The adjusting means C includes a female screw 8c of a mounting hole formed through the retaining member 8 along the axial direction of the bolt 11 and a male screw 12a formed on the outer peripheral surface of the rotation stopper 12. The protrusion of the second biting projection 12 from the inner side surface 8b of the retaining member 8 is adjusted by screwing the male screw 12a of the locking member 12 to the female screw 8c of the retaining member 8. Can be adjusted.
Further, a hexagonal operation hole 12b for rotating the anti-rotation material 12 with a tool is formed at the other end of the anti-rotation material 12.
[0020]
On both side surfaces in the tube circumferential direction of each retaining member 8, the retaining member 8 is engaged with the locking hole 15 formed in the side wall portion of the recess 9 corresponding thereto from the tube circumferential direction. A mounting hole 17 for a temporary fixing member 16 made of rubber or synthetic resin that is temporarily fixed and held at a predetermined mounting position is formed.
[0021]
The temporary fixing member 16 is provided when a pressing force inward in the radial direction of the tube is applied to the retaining member 8 in the recess 9 by the screwing operation of the push bolt 11 or the receiving tube portion 1 and the insertion tube portion 2. So as to allow the retaining member 8 to be forcibly moved inwardly in the radial direction of the tube when the retaining member 8 is applied with a pressing force toward the biting side along with the relative separation movement in the tube axis X direction. It is configured.
[0022]
When the retaining member 8 mounted in the recess 9 is pressed against the outer peripheral surface 2a side of the insertion tube portion 2 by the screwing operation of the pressing means A to the tightening side of the push bolt 11, the retaining member 8 is integrally formed. The two first biting projections 8A and the second biting projection 12A formed integrally with the distal end portion of the anti-rotation member 12 bite into the outer peripheral surface 2a of the insertion tube portion 2 along the pipe circumferential direction. Long and long (or along the direction in which the component in the tube circumferential direction is the main component), both the first biting protrusions 8A are connected in the direction of the tube axis X between the connected receiving tube portion 1 and insertion tube portion 2. The second bite that can exhibit a separation preventing function that prevents the relative movement of the tube and that is long along the direction including at least the component in the tube axis X direction (or long only along the tube axis X direction). The projection 12A prevents relative rotation between the receiving tube 1 and the insertion tube 2. An anti-rotation function that stops can also be exhibited.
[0023]
In addition, as shown in FIG. 7, when devices such as an air valve 20 and a fire hydrant are connected in the middle of the piping system and these devices need to be maintained in a specific posture, the first biting protrusion The stopper member 12 provided with the second biting projection 12A is attached to the retaining member 8 provided with 8A, whereby the receiving pipe portion 1 of one fluid transport pipe P and the other fluid transport pipe connected in communication with each other. It is possible to prevent both the relative detachment movement and the relative rotation in the direction of the tube axis X with respect to the insertion tube portion 2 of P, and maintain the device in a specific posture.
[0024]
In addition, when the pipe system is buried in the ground, and when external force in the pipe circumferential direction such as rotational force or twisting force is applied due to uneven settlement or earthquake, the first biting projection 8A is Inserting the receiving pipe part 1 of one fluid transport pipe P and the other fluid transport pipe P connected in communication by removing the anti-rotation member 12 provided with the second biting projection part 12A from the retaining member 8 provided. While reliably preventing the relative detachment movement from the tube portion 2, the external force in the tube circumferential direction can be absorbed by the relative rotation of the receiving tube portion 1 and the insertion tube portion 2.
[0025]
Therefore, with respect to the retaining member 8 provided with the first biting projection portion 8A, the removal prevention function and the rotation prevention function can be performed with a simple operation of simply removing the detent member 12 provided with the second biting projection portion 12A. Can be used separately, and those with only a separation prevention function.
[0026]
Further, it is not necessary to provide the anti-rotation member 12 for all the retaining members 8 held in the respective recesses 9 of the pusher wheel 4, and the anti-rotation member 12 may be provided on at least one of the retaining members 8.
[0027]
Further, as the retaining member 8 to be mounted in the plurality of recesses 9 of the push wheel 4, a member provided with the anti-rotation member 12 and a member not provided with the anti-rotation member 12 can be appropriately selected. It is possible to easily change to the most appropriate detachment prevention force and rotation prevention force according to the use conditions.
[0028]
[Second Embodiment]
In the first embodiment described above, the locking member 12 provided with the second biting projection 12A is detachably screwed into the retaining member 8 provided with the first biting projection 8A, and the first Although the two biting projections 12A are formed in an annular shape along the direction including the component in the tube axis X direction and the component in the tube circumferential direction, as shown in FIGS. A prismatic detent provided with a linear second biting projection 12A that can bite into the outer peripheral surface 2a of the insertion tube portion 2 along the tube axis X direction on the retaining member 8 provided with the projection 8A. The rectangular first mounting hole 8d that fits and holds the member 12 in a non-rotatable state and the second biting projection 12A that is fitted and held in the first mounting hole 8d are fastened and fixed to the retaining member 8. A second mounting hole 8e for mounting the bolt 21 from the outer side in the pipe radial direction may be formed in communication.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.
[0029]
[Other Embodiments]
(1) In each of the above-described embodiments, cam means for displacing the retaining member 8 inward in the radial direction of the tube with the relative detachment movement of the receiving tube portion 1 and the insertion tube portion 2 in the tube axis X direction. Although B is provided, the technique of the present invention may be applied to a device for preventing separation of a pipe joint portion that is not provided with such cam means B.
That is, even if the technique of the present invention is applied to the pipe joint portion separation preventing device provided with only the pressing means A that presses the retaining member 8 mounted in each concave portion 9 against the outer peripheral surface 2 a of the insertion tube portion 2. Good.
[0030]
(2) In each of the above-described embodiments, the first biting projection 8A of the retaining member 8 is formed long along the pipe circumferential direction. However, the first biting projection 8A is formed in the pipe circumferential direction. You may form long along the direction which cross | intersects.
In short, the first biting protrusion 8A of the retaining member 8 may be either continuous or intermittent, as long as it is long along the direction in which the component in the pipe circumferential direction is the main component. .
Further, the number of the first biting protrusions 8A may be one, two as in the above-described embodiment, or may be three.
[0031]
(3) In the first embodiment described above, the second biting protrusion 12A is formed in an annular shape along the direction including the component in the tube axis X direction and the component in the tube circumferential direction. In the second embodiment, the second biting protrusion 12A is formed in a straight line along the tube axis X direction, but the second biting protrusion 12A intersects the tube axis X direction. A straight line or a curved line may be formed.
In short, the second biting projection 12A may be either continuous or intermittent, but as long as it is long in the direction including at least the component in the tube axis X direction.
[0032]
(4) The tip of each of the first biting projections 8A and the second biting projections 12A is formed into a corrugated shape or an inclined shape with a protruding amount that increases toward one end in the longitudinal direction. Also good.
[0033]
(5) In each of the above-described embodiments, the locking member 12 having the second biting protrusion 12A is configured to be detachable with respect to the retaining member 8 having the first biting protrusion 8A. Although the method is adopted, it may be configured to be detachable by a fitting method instead of such a screw method.
[0034]
(6) After the retaining member 8 provided with the first biting projection 8A and the locking member 12 provided with the second biting projection 12A are separately manufactured, the locking member 12 is used as the locking member 8. It may be carried out by fixing with an appropriate fixing means.
[Brief description of the drawings]
FIG. 1 is a cross-sectional side view of a pipe joint detachment preventing device showing a first embodiment of the present invention. FIG. 2 is a cross-sectional front view. FIG. Fig. 5 is an exploded exploded perspective view of the retaining member and the locking member. Fig. 6 is an enlarged inner side view of the retaining member and the locking member. Fig. 7 is a side view showing an example of the piping system. 8] Enlarged partially cutaway front view of the pipe joint part detachment preventing device showing the second embodiment of the present invention. [FIG. 9] Enlarged inner side view of the retaining member and the rotation preventing member. [FIG. 10] Conventional pipe joint part. FIG. 11 is a cross-sectional side view showing a device for preventing the separation of the member.
A Pressing means C Adjusting means X Tube axis 1 Receiving tube portion 2 Insertion tube portion 2a Outer peripheral surface 4 Push ring 8 Retaining member 8A First biting projection portion 8c Female screw 12 Non-rotating member 12A Second biting projection portion 12a Male screw

Claims

Between the outer peripheral surface of the insertion tube portion inserted and connected to the receiving tube portion, and the inner peripheral surface of the press ring fixedly connected to the receiving tube portion from the tube axis direction in a state of covering the insertion tube portion. An apparatus for preventing separation of a pipe joint portion provided with a retaining member capable of biting on the outer peripheral surface of the insertion tube portion and provided with pressing means for pressing the retaining member against the outer peripheral surface of the insertion tube portion,
Formed on the inner surface of the retaining member is a first biting projection that can bite into the outer peripheral surface of the insertion tube portion along a direction in which the component in the tube circumferential direction is the main component. Oh Ri provided detent member having a second biting projections capable bite the outer circumferential surface of the insertion tube portion along a direction including the center direction component,
An apparatus for preventing separation of a pipe joint, wherein the anti- rotation member is configured to be detachable with respect to a retaining member .

2. The apparatus for preventing separation of a pipe joint part according to claim 1, wherein an adjusting means for adjusting a protrusion margin of the second biting projection part from the inner side surface of the retaining member is provided between the retaining member and the rotation preventing member. .

3. The apparatus for preventing detachment of a pipe joint portion according to claim 2, wherein the adjusting means comprises a female screw of an attachment hole formed through the retaining member and a male screw formed on the outer peripheral surface of the non-rotating member .

Between the outer peripheral surface of the insertion tube portion inserted and connected to the receiving tube portion, and the inner peripheral surface of the press ring fixedly connected to the receiving tube portion from the tube axis direction in a state of covering the insertion tube portion. An apparatus for preventing separation of a pipe joint portion provided with a retaining member capable of biting on the outer peripheral surface of the insertion tube portion and provided with pressing means for pressing the retaining member against the outer peripheral surface of the insertion tube portion,
Formed on the inner surface of the retaining member is a first biting projection that can bite into the outer peripheral surface of the insertion tube portion along a direction in which the component in the tube circumferential direction is the main component. A detent member provided with a second biting projection that can bite into the outer peripheral surface of the insertion tube along the direction including the component in the core direction;
An apparatus for preventing detachment of a pipe joint portion, wherein an adjusting means for adjusting a projection allowance of a second biting protrusion from an inner surface of the retaining member is provided between the retaining member and the rotation preventing member .

5. The apparatus for preventing separation of a pipe joint portion according to claim 4, wherein the adjusting means comprises a female screw of an attachment hole formed through the retaining member and a male screw formed on the outer peripheral surface of the non-rotating member .

The pipe joint according to any one of claims 1 to 5, wherein the second biting protrusion is formed in an annular shape along a direction including a component in the tube axis direction and a component in the tube circumferential direction. Departure prevention device.

Between the outer peripheral surface of the insertion tube portion inserted and connected to the receiving tube portion, and the inner peripheral surface of the press ring fixedly connected to the receiving tube portion from the tube axis direction in a state of covering the insertion tube portion. In addition to providing a retaining member capable of biting on the outer peripheral surface of the insertion tube portion, and a device for preventing the separation of the pipe joint portion provided with pressing means for pressing the retaining member against the outer peripheral surface of the insertion tube portion,
Formed on the inner surface of the retaining member is a first biting projection that can bite into the outer peripheral surface of the insertion tube portion along the direction in which the component in the tube circumferential direction is the main component. A detent member provided with a second biting projection that can bite into the outer peripheral surface of the insertion tube along the direction including the component in the core direction;
The apparatus for preventing separation of a pipe joint portion in which the second biting protrusion is formed in an annular shape along a direction including a component in the tube axis direction and a component in the tube circumferential direction.

At least one of the retaining members attached to the recesses is formed on the inner peripheral surface of the press ring and at a plurality of locations spaced apart from each other at a predetermined interval in the pipe circumferential direction by forming recesses to which the retaining members are detachably attached. 8. The apparatus for preventing separation of a pipe joint according to any one of claims 1 to 7, wherein the anti-rotation member is provided.