JP4602590B2

JP4602590B2 - Pipe fittings

Info

Publication number: JP4602590B2
Application number: JP2001134577A
Authority: JP
Inventors: 章堀本
Original assignee: Sakura Rubber Co Ltd
Current assignee: Sakura Rubber Co Ltd
Priority date: 2001-05-01
Filing date: 2001-05-01
Publication date: 2010-12-22
Anticipated expiration: 2021-05-01
Also published as: JP2002327884A

Description

【０００１】
【発明の属する技術分野】
本発明は、雌雄の区別のない一対の同一構造の結合金具本体から構成される配管類の結合金具であって、特に、結合金具本体に取付けられ、結合金具本体相互をシールするシール構造の改良に関する。
【０００２】
【従来の技術】
ホース、たとえば消防ホースの結合金具として差し込み型のものが知られているが、これは結合される一対の結合金具本体に雌雄の区別があって、雄金具相互、または雌金具相互の結合ができない。
【０００３】
特に、消火作業のように迅速性と確実性が求められるところに用いられるものとしては、取扱い上の不便さがあり、また、構造の相違する雄金具と雌金具の２種類の金具を製造しなければならず、製造コストが高くなっている。
【０００４】
このような不具合を解消するため、雌雄の区別のない同一の形状の一対の結合金具本体からなるホースの結合金具が開発された。たとえば、本出願人において出願した特願平７−２７５８３５号があり、すでに特許登録（特許第３１０７５０７号）に至っている。
【０００５】
近時、このホースの結合金具を、たとえば食品プラント関係（いわゆる、サニタリーと呼ばれる）を構成する配管類の結合や、医薬品あるいは化粧品などの製造ラインを構成する配管類の結合に転用することの要望が大である。
【０００６】
すなわち、結合金具本体相互の結合と離脱がワンタッチで行えて、作業性の大幅な改善が得られること、および必要に応じて分解（分離）が簡単に行えることなどの利点がある。
【０００７】
【発明が解決しようとする課題】
ここで問題は、配管内に導かれる流体が、結合金具本体内においても常に円滑に流れることである。すなわち、流体として完全に新鮮であることが求められ、少しでも溜まる部位が存在してはならない。
【０００８】
図１０（Ａ）に示す特願平７−２７５８３５号においては、円筒状のシール面部材ａの前端面に取付けられるシール部材ｂが、結合金具本体Ｓ相互の結合時に、互いに密接状態となってシールすることの他に、シール部材ｂとシール面部材ａ端面と間に凹部空間ｄが形成されてしまう。
【０００９】
当然、配管内を導かれる流体には流体圧があって円滑に流通しているのだけれども、一旦、上記凹部空間ｄに入り込んだ流体はここから出難い。すなわち、凹部空間ｄが流体の溜まり部となってしまう。
【００１０】
図１０（Ｂ）は、シール部材ｂ１がシール面部材ａ１から軸方向に抜け出ないように改良されたものであるが、ここでは図示しない結合金具本体相互の結合時に、互いのシール部材ｂ１の基端に凹部空間ｄが存在することに変わりがなく、ここが流体の溜まり部となってしまう。
【００１１】
図１０（Ｃ）に示す実用新案登録第３０６４９３８号は、送水ホースの接手筒Ｓ１相互を接合したときに、相互の接合面を圧着シールするシールパッキンｂ２の形態が特徴であるが、やはりシールパッキンｂ２と接手筒Ｓ１との間に凹部空間ｄが形成されていて、流体が容易に浸入して溜まり部になる。
【００１２】
すなわち、いずれのシールパッキンｂ，ｂ１，ｂ２であっても、いわゆる舌片状に形成されて取付け部から突出しているので、互いに密接するシール状態では、非密接側と取付け部との間に凹部空間が生じることが避けられない。
【００１３】
そのため、ワンタッチで結合着脱できる結合金具であって、結合着脱作業性に優れ、かつ結合金具本体相互に対するシール性を確保しているのであるが、流体の溜まり部が生じることにより、適用範囲が規制されるという不具合がある。
【００１４】
本発明は上記事情に着目してなされたものであり、その目的とするところは、結合金具本体相互をワンタッチで結合着脱でき、かつ結合状態でシール性を確保したうえで、流体が溜まることの全くない構成で、常に新鮮な流体が得られ、適用範囲の拡大が得られる配管類の結合金具を提供しようとするものである。
【００１５】
【課題を解決するための手段】
上記目的を満足するため本発明の配管類の結合金具は、請求項１として、一対の結合金具本体が配管端部もしくは配管要素に一体に接続され、各結合金具本体の周端部に沿い所定間隔を存して軸方向に突出する複数の嵌合突部が設けられて、これら嵌合突部相互間に嵌合凹部が形成され、嵌合突部の一方の側面に周方向に突出する係止鉤部が設けられ、他方の側面に周方向に弾性力を付勢する付勢機構が設けられ、結合金具本体の前端面に弾性材料からなるシール部材が取付けられ、結合金具本体相互における係止鉤部相互の係合と付勢機構の弾性付勢力をもって結合金具本体相互を着脱自在に結合し、この結合によりシール部材相互が当接してシールを維持する配管類の結合金具において、シール部材は、結合金具本体の前端面に設けられる取付用凹部に取付けられ、所定の内径と外径とを有するリング状をなし、その一端面と外径面が取付用凹部の底面と周面に嵌め込まれ、他端面が結合金具本体前端面から突出して他方の結合金具本体に取付けられるシール部材に密接シールをなし、突出端面は、その突出量が外径側よりも内径側が大になるよう傾斜形成され、
上記シール部材の一端面と結合金具本体の取付用凹部底面は、上記シール部材の一端面の突出量が外径側よりも内径側が大になるよう傾斜形成され、このシール部材の一端面の傾斜に合わせて、上記結合金具本体の取付用凹部底面の突出量が外径側よりも内径側が小になるよう傾斜形成されることを特徴とする。
【００１６】
なお、シール部材の材質としては、ゴムなどの弾性材料に限定されるものではなく、弾性変形するものであればテフロン（登録商標）、あるいはメタル等であっても支障がない。
【００１７】
請求項２として、請求項１記載の配管類の結合金具においてシール部材の外径面および、このシール部材外径面と係合する取付用凹部周面に、シール部材の取付用凹部から軸方向への抜けを防止する係止突起および係止凹部が設けられることを特徴とする。
【００１８】
請求項３として、請求項１記載の配管類の結合金具においてシール部材に、配管内部が負圧状態になったとき互いに密接してシールする負圧シール部が一体に設けられることを特徴とする。
【００１９】
請求項４として、請求項１記載の配管類の結合金具において取付用凹部底面およびシール部材一端面に、配管内部が負圧状態になったときシール部材の内径方向への移動を規制する移動規制用突部および移動規制用凹部が設けられることを特徴とする。
【００２０】
上述の課題を解決する手段を採用することにより、請求項１の発明によれば、結合金具本体相互をワンタッチ結合した状態でシール性を確保するとともに、流体の溜まることのない構成で、流体を常に新鮮な状態で流通させる。
【００２１】
請求項２の発明によれば、ワンタッチ結合金具本体相互を結合した状態でシール性を確保し、流体の溜まることのない構成で、さらに、シール部材の取付け用凹部からの軸方向への抜けを確実に防止する。
【００２２】
請求項３の発明によれば、結合金具本体相互をワンタッチ結合した状態でシール性を確保し、流体の溜まることのない構成で、さらに、配管内部の洗浄時など負圧がかかっても、シール性が損なわれることがない。
【００２３】
請求項４の発明によれば、結合金具本体相互をワンタッチ結合した状態でシール性を確保し、流体の溜まることのない構成で、さらに、配管内部の洗浄時など負圧がかかっても、シール部材の内径方向への移動を確実に規制する。
【００２４】
【発明の実施の形態】
以下、本発明の実施の形態を図面にもとづいて説明する。
【００２５】
図１は、分離した結合金具を示している。この結合金具は、雌雄のない同一の構造の一対の結合金具本体１，１から構成される。それぞれの結合金具本体１は、たとえば配管２端部にロー付けなどの適宜な手段で連結固定される。
【００２６】
上記結合金具本体１は略円筒体からなっていて、その外径は配管２の連結部から先端に亘って直径が拡大するテーパー状に形成され、内径は連結される配管２の内径と略同一に形成される。
【００２７】
結合金具本体１の内径先端から円筒状のシール面円筒体３が螺装されている。
そして、シール面円筒体３の前端面に、後述するようにして、ゴムパッキンなど弾性材からなるシール部材４が取付け固定される。
【００２８】
上記結合金具本体１の先端はシール面円筒体３を囲んでおり、ここには周方向に所定間隔を存して、かつ軸方向に突出する複数の嵌合突部５が一体に設けられる。これら嵌合突部５の相互間を、それぞれ嵌合凹部６と呼ぶ。
【００２９】
上記結合金具本体１相互が軸方向に結合されると、一方の結合金具本体１の嵌合突部５が他方の結合金具本体１の嵌合凹部６内に挿入され、また一方の結合金具本体１の嵌合凹部６内に他方の結合金具本体１の嵌合突部５が挿入されて、互いに相補形に挿入するようになっている。
【００３０】
なお、嵌合凹部６の幅寸法は嵌合突部５の幅寸法よりも広く形成されていて、嵌合凹部６内に嵌合突部５が挿入した状態で、対向する側面相互間に隙間を存することになる。
【００３１】
上記嵌合突部５の一方の側面５ａには、周方向に突出する係止鉤部７が一体に設けられる。したがって、互いの嵌合突部５に突設される係止鉤部７相互が係合することにより、結合金具本体１相互が軸方向に結合されることとなる。
【００３２】
また、係止鉤部７の係止面は、周方向に対して所定の角度だけオーバーハング状に傾斜しており、これらが係合した状態で流体圧などにより結合金具本体１相互を引き離す方向の荷重が作用した場合に、係止鉤部７相互はより強く係合し、結合金具本体１相互の抜けを確実に防止するように構成される。
【００３３】
さらに、係止鉤部７相互が係合した状態で、嵌合突部５の先端面と嵌合凹部６の奥壁面との間に隙間を存している。したがって、係止鉤部７相互が係合した状態から、嵌合突部５と嵌合凹部６とがさらに軸方向に互いに進入するように移動可能である。
【００３４】
係止鉤部７が設けられていない嵌合突部５の他方の側面５ｂは、結合金具本体１の軸方向に対して傾斜している。すなわち、嵌合突部５は嵌合凹部６の底部に相当する基端から先端に亘って周方向の幅寸法が狭くなるテーパー状に形成され、上記側面５ｂは嵌合突部５を嵌合凹部６に挿入する際のガイド面をなす。
【００３５】
上記テーパー状側面５ｂには、それぞれ付勢機構８が設けられている。この付勢機構８は、図２に拡大して示すように、円筒形のケース部材９内に突没自在に収容される付勢部材としての鋼球１０と、この鋼球１０を嵌合突部側面５ｂから突出する方向に弾性的に押圧付勢するスプリング１１とから構成される。
【００３６】
同図に示すように、嵌合突部５が相手側の嵌合凹部６内に嵌合されると、付勢機構８相互が対向して鋼球１０相互が互いに当接し押圧しあう。その結果、嵌合突部５の付勢機構８が設けられる側面５ｂ相互が離反し、かつ反対側の側面５ａ相互が密接するよう押圧付勢される。
【００３７】
そして、これら側面５ａには係止鉤部７が設けられているので、上記付勢機構８、８の作用によって係止鉤部７、７相互はより強固に係合し、衝撃などによって問題が発生しない。
【００３８】
このようにして構成される結合金具本体１，１相互を結合するには、一方の結合金具本体１の嵌合突起５に対して他方の結合金具本体１の嵌合凹部６を正対させる。必然的に、一方の結合金具本体１の嵌合凹部６に対して他方の結合金具本体１の嵌合突部５が正対する。
【００３９】
そのままの姿勢を保持して、少なくとも一方の結合金具本体１を軸方向に移動すればよい。結合金具本体１，１相互の嵌合凹部６内に嵌合突部５が挿入され、かつ付勢機構８の鋼球１０，１０相互が転接した状態で、互いの係止鉤部７，７相互が係合する。
【００４０】
結合金具本体１，１相互が結合されて、配管２，２相互の結合がなされる。同時に、後述するようにシール部材４，４相互が密接状態となり、結合金具本体１，１と配管２，２相互に対するシール性が確保される。
【００４１】
必要に応じて配管２を分解（分離）する場合は、いずれか一方の結合金具本体１を周方向に回動付勢すればよい。このときの回動付勢方向は、付勢機構８が設けられる側面５ｂ、５ｂ相互が密接する方向である。
【００４２】
すなわち、付勢機構８の押圧付勢力に抗して結合金具本体１を回動することとなり、側面５ｂ，５ｂ相互が密接したところで、それまで係合状態にあった係止鉤部７，７相互が離反する。結合金具本体１，１相互の結合状態が解除されて、結合金具本体は互いに自由になり、分解できる。
【００４３】
なお、ここでは結合金具本体１に配管２を接続したが、配管に変わって弁類などの配管接続機器あるいはホース類でもよく、また、結合金具本体１を、本体部と、嵌合部とから構成するよう変更してもよい。
【００４４】
すなわち、本体部の一端に配管２を接続し、他端にシール面円筒体３を取付け、嵌合部には嵌合突部５、嵌合凹部６、係止鉤部７、付勢機構８などを形成する。このことにより、結合金具本体１，１相互の結合と分解（分離）の際は、嵌合部に対する操作ですみ、嵌合部が容易に扱えて作業性の向上を得る。
【００４５】
いずれの構成の係合金具本体１であっても、シール面円筒体３と、このシール面円筒体３に取付けられるシール部材４は、図３以下に示すようになっている。
以下、詳細に説明する。
【００４６】
図３は、第１の実施の形態のシール面円筒体３Ａと、このシール面円筒体３Ａに取付けられるシール部材４Ａを示す。
【００４７】
上記シール面円筒体３Ａの前端面には、周方向に亘って取付用凹部１５が設けられていて、この取付用凹部１５に上記シール部材４Ａが取付けられる。取付用凹部１５は、シール面円筒体３Ａの内径側から外径側に亘って漸次突出する方向に斜めに形成される底面１５ａと、シール面円筒体３Ａの軸方向に平行な周面１５ｂを備えている。上記底面１５ａの傾斜角度は、たとえば、１５度に設定されている。
【００４８】
さらに、取付用凹部１５の周面１５ｂ前端には、内径方向に突出する係止突起１５ｃが一体に設けられる。この係止突起１５ｃは、周面全面に亘って設けてもよく、あるいは周方向に所定間隔を存して設けてもよい。
【００４９】
上記シール部材４Ａは、所定の肉厚および内径と外径とを有するリング状をなす。内径はシール面円筒体３Ａの内径と同一寸法に形成され、外径は取付用凹部１５の周面１５ｂ直径と略同一である。詳しくは、シール部材４Ａの方を５％位大きくしておき、これを縮めて取付けることによって、外れ難くしている。
【００５０】
シール部材４Ａの一端面４ａは、外径側から内径側に亘って漸次突出する傾斜面をなしていて、この傾斜角度は取付用凹部底面１５ａの傾斜角度と同一である。また、シール部材４Ａの周面は軸方向と平行であり、この外径前端には内径方向に凹陥形成される係止凹部１６が設けられる。
【００５１】
上記係止凹部１６は、取付用凹部１５に設けられる係止突起１５ｃの寸法形状と対応するよう形成されていて、このことからシール部材４Ａはシール面円筒体３Ａの取付用凹部１５に嵌め込まれる。
【００５２】
しかも、シール面円筒体３Ａの係止突起１５ｃにシール部材４Ａの係止凹部１６が係止されているところから、シール部材４Ａがシール面円筒体３Ａから軸方向へ抜け出ることの防止がなされている。
【００５３】
シール部材４Ａがシール面円筒体３Ａに取付けられた状態で、シール部材４Ａの一端面４ｂはシール面円筒体３Ａの前端面から突出している。なお説明すれば、シール部材４Ａの突出端面４ｂは、その突出量が外径側よりも内径側が大になるよう傾斜形成される。
【００５４】
シール部材４Ａの突出端面４ｂに形成される傾斜角度は、シール部材４Ａの一端面４ａと取付用凹部１５の底面１５ａに形成される傾斜角度と同程度であり、したがって例えば１５度に設定されている。
【００５５】
結局、シール部材４Ａの最も肉厚の厚い部位は内径側であり、肉厚の薄い部位は外径側であって、その両端面は内径側から外径側に下がり勾配となる傾斜面に形成されることになる。
【００５６】
図３（Ａ）は、結合金具本体１相互を正対させ、互いのシール面円筒体３Ａに取付けられるシール部材４Ａが対向している状態を示している。すなわち、結合金具本体１相互の結合前である。
【００５７】
図３（Ｂ）は、いずれか一方の結合金具本体１を軸方向に移動して、結合金具本体１相互を結合させることにより、シール部材４Ａ相互が弾性変形して密接しシール性を確保している状態を示している。
【００５８】
シール部材４Ａの突出端面４ｂにおける傾斜角度の設定から、シール部材４Ａ相互を突き合わせても突出端面４ｂの外径側周縁は互いに密着せずに残り、かつシール面円筒体３Ａ相互の前端面は所定の間隔を存する。
【００５９】
このとき、上記配管２および結合金具本体１相互内には流体は流通せず、内部が無加圧状態である。また、シール部材４Ａは弾性材からなるので、全体の体積は結合前と結合後で全く変化しない。そのため、シール部材４Ａの外径側は結合前の傾斜面４ｂから突出して断面Ｒ状をなし、内径側は中心軸方向に突出するよう弾性変形する。
【００６０】
図３（Ｃ）は、実際に配管２および結合金具本体１内に流体を流通させた状態を示していて、内部に所定の圧力がかかっている。シール部材４Ａの内径面は流体圧を受けて外径側へ押圧され、その分、外径側周縁は外方へ突出する。
【００６１】
結合金具本体１相互を結合してシール部材４Ａ相互を密接させれば、シール部材４Ａ相互によりシール性を確保する。その一方で、シール部材４Ａとシール面円筒体３Ａとの間に凹部空間が形成されないから、流体の液溜まりが生じることがなく、円滑に流通して常に新鮮な流体が得られる。
【００６２】
図４は、第２の実施の形態のシール面円筒体３Ｂと、このシール面円筒体３Ｂに取付けられるシール部材４Ｂを示す。
【００６３】
第１の実施の形態と同一部位については同番号を付していて、シール面円筒体３Ｂに設けられる係止突起１５と、シール部材４Ｂに設けられる係止凹部１６が、シール部材４Ｂの突出端面４ｂよりも内側に形成されることが相違する。すなわち、シール部材４Ｂの外径側周縁がシール面円筒体３Ｂの前端面を覆っていて、シール面円筒体３Ｂの前端面は少しも露出していない。
【００６４】
図４（Ａ）から図４（Ｃ）に亘って、先に図３（Ａ）から図３（Ｃ）に亘る作用とほとんど同一の作用をなす。特に相違する点として、図４（Ｃ）の流体を流通させた状態で、内部に所定圧力がかかっているので、シール部材４Ｂの内周面は流体圧を受けて外径側へ押圧され、その分、外径側周縁がシール面円筒体３Ｂから外方へ突出することである。
【００６５】
そして、結合金具本体１相互を結合してシール部材４Ｂ相互を密接させれば、シール性を確保する一方で、シール部材４Ｂとシール面円筒体３Ｂとの間に凹部空間が形成されないから、流体の液溜まりが生じることがなく、円滑に流通して常に新鮮な流体が得られる。
【００６６】
図５は、第３の実施の形態のシール面円筒体３Ｃと、このシール面円筒体３Ｃに取付けられるシール部材４Ｃとを示している。
【００６７】
第１の実施の形態と同一部位については同番号を付していて、ここでの特徴は、たとえば配管２内部を蒸気洗浄したあと配管が冷えて水蒸気が結露した場合に、配管２および結合金具本体１内に負圧がかかるので、正圧ばかりでなく負圧にも対応できるシール構造を備えることである。
【００６８】
すなわち、シール面円筒体３Ｃの前端面に取付用凹部１５を備え、かつ取付用凹部１５にシール部材４Ｃが取付けられることは変わりがないが、シール部材４Ｃの突出端面４ｂにおける外径側周端部に沿って負圧シール部１７Ａが一体に設けられていることが相違する。
【００６９】
この負圧シール部１７Ａは、突出端面４ｂの内径側から外径側に亘る傾斜とは逆に、内径側から外径側に突出量が大になる傾斜になっていて、負圧シール部１７Ａ全体がシール面円筒体３Ｃ前端に設けられる係止突起１５ｃ上に載る。
【００７０】
図５（Ａ）は、結合金具本体１相互を正対させ、互いのシール面円筒体３Ｃに取付けられるシール部材４Ｃが対向している状態を示している。すなわち、結合金具本体１相互の結合前である。
【００７１】
図５（Ｂ）は、結合金具本体１相互を結合させ、シール部材４Ｃの突出端面４ｂ相互を密接させている。シール性を確保しているが、流体は流通していない無圧状態である。負圧シール部１７Ａ相互もある程度密接しており、これより内径側のシール傾斜面４ｂとの間に略菱形状の空間部が形成される。
【００７２】
配管２および結合金具本体１内に流体を流通させると、特に図示しないが、シール部材４Ｃに正圧がかかることにより内周面は外径側へ押圧され、その分、外径側周縁は外方へ突出する。
【００７３】
負圧シール部１７Ａ横の菱形空間部は変形するが、依然として空間部として残ることは間違えない。ただし、ここには流体が導かれず、シール部材４Ｃによるシール性が確保される一方で、凹部空間が形成されず液溜りがないから、流体は結合金具本体１内を円滑に流通する。
【００７４】
図５（Ｃ）は、たとえば配管２内部を蒸気洗浄した場合で、配管２および結合金具本体１相互内部に負圧がかかった状態を示している。
配管内が負圧になると、結合金具本体１相互を押し付ける方向の荷重が作用する。係止鉤部７相互が係合した状態で、嵌合突部５の先端面と嵌合凹部６の奥壁面との間に隙間を有しているので、この荷重によって嵌合突部５と嵌合凹部６とがさらに軸方向に互いに進入するように移動する。
【００７５】
つまり、互いのシール面円筒体３Ｃを押し付けるように移動するので、シール部材４Ｃの外径側に一体に設けられる負圧シール部１７Ａ相互も軸方向に圧縮力を受けて弾性変形し、互いの密接長さがより長くなってシール力を増す。
【００７６】
また、配管内が真空になった場合を考えると、負圧シール部１７Ａには大気圧による約０．１ＭＰａの圧力がかかって、負圧シール部１７Ａは内径側へ押圧される。
【００７７】
このとき、負圧シール部１７Ａが取付いているシール面円筒体３Ｃの前端の周面全面に亘って設けられた係止突起１５ｃの最先端には、シール面円筒体３Ｃの外径側から内径側に亘って漸次突出する方向に斜めに形成される負圧シール受け面１５ｄが設けてある。この負圧シール受け面１５ｄの傾斜角度は、例えば２０度に設定されている。
【００７８】
一方、シール部材４Ｃの外径側に設けられた負圧シール部１７Ａに形成される傾斜角度は、突出端面４ｂに形成された傾斜角度より多少大きい方がよいので、例えば２５度に設定されている。
【００７９】
ここで、負圧がかかった状態でのシール機構を、図５（Ｃ）から説明する。対向する負圧シール受け面１５ｄで挟まれて密接した、２つの負圧シール部１７Ａを一体として見ると、その断面形状はシール面円筒体３Ｃの内径側を向いたクサビ形状をなしている。
【００８０】
上記負圧シール部１７Ａには、大気圧による約０．１ＭＰａの圧力が加わって負圧シール部１７Ａは内径側へ押圧されるので、あたかもクサビを打ち込んだような状態となってシール効果を発揮するものである。
【００８１】
なお、この機構は内圧を受ける場合でも同様である。図３に示す取付用凹部１５の底面１５ａで挟まれて密接した２つのシール部材４を一体として見ると、その断面形状はシール面円筒体３Ａの外径側を向いたクサビ形状をなしている。
【００８２】
シール部材４には内圧による大きな圧力が加わって、シール部材４は外径側へ押圧されるので、あたかもクサビを打ち込むような状態となってシール効果を発揮するものである。
【００８３】
また、内圧用のシール部材４と負圧シール部１７Ａの大きさを比べると、負圧シール部１７Ａの方が小さいが、その理由は、３．０ＭＰａにも達する流体の圧力に比べて、真空時に受ける大気圧の方が約０．１ＭＰａと非常に小さいからである。
【００８４】
すなわち、結合金具本体１相互を結合してシール部材４Ｃ相互を密接させれば、配管２と結合金具本体１内に正圧がかかったときは勿論のこと、負圧がかかった状態でも、負圧シール部１７Ａを備えたシール部材４Ｃ相互によってシール性を確保する。
【００８５】
その一方で、シール部材４Ｃと結合金具本体１との間に凹部空間が形成されないから、流体の液溜まりが生じることがなく、円滑に流通して常に新鮮な流体が得られる。
【００８６】
図６は、第４の実施の形態のシール面円筒体３Ｄと、このシール面円筒体３Ｄに取付けられるシール部材４Ｄとを示している。
【００８７】
上記第１の実施の形態と同一部位については同番号を付していて、ここでは第３の実施の形態と同様、正圧ばかりでなく負圧にも対応できるシール部材４Ｄを備えることを特徴としている。
【００８８】
負圧シール部１７Ｂとして、シール部材４Ｄの突出端面４ｂにおける外径側周縁に沿って舌片状のものが一体に設けられてなる。この舌片状負圧シール部１７Ｂは、シール面円筒体３Ｄ前端の係止突起１５ｃとは離間している。
【００８９】
図６（Ａ）から図６（Ｃ）に亘って、先に図５（Ａ）から図５（Ｃ）に亘る作用とほとんど同一の作用をなす。すなわち、図６（Ｃ）に示す配管２と結合金具本体１内部に負圧がかかった状態で、負圧シール部１７Ｂ相互の密接長さがより長くなるよう弾性変形する。
【００９０】
このようにして、配管２と結合金具本体１内に正圧がかかったときは勿論のこと、負圧がかかってもシール性が確保される一方で、シール部材４Ｄとシール面円筒体３Ｄとの間に凹部空間が形成されないから、流体の液溜まりが生じることがなく、円滑に流通して常に新鮮な流体が得られる。
【００９１】
図７は、第５の実施の形態のシール面円筒体３Ｅと、このシール面円筒体３Ｅに取付けられるシール部材４Ｅとを示している。
【００９２】
上記第１の実施の形態と同一部位については同番号を付していて、ここでは、負圧がかかった場合のシール部材４Ｅの内径方向への位置ズレを規制することを特徴にしている。
【００９３】
すなわち、以上説明した実施の形態では、取付用凹部１５の底面１５ａと周面１５ｂに、シール部材４の一端面４ａと周面が嵌め込まれおり、上記底面１５ａおよび一端面４ａは外径側よりも内径側の突出量が小になるように傾斜形成されている。
【００９４】
密接するシール部材４相互に正圧がかかった場合は、外径方向へ圧力を受けるが、この方向は上記底面１５ａと一端面４ａとの傾斜面で受けられる方向であって、何らの問題もない。
【００９５】
ただし、負圧を受けるとシール部材４は内径側へ移動する圧力を受ける。この方向は、上記底面１５ａと一端面４ａの傾斜に沿う方向でもあり、以上説明したシール部材４では内径方向に位置ズレする虞れがある。
【００９６】
そこで、上記シール面円筒体３Ｅに設けられる取付用凹部１５の底面１５ａ一部と、シール部材４Ｅの一端面４ａに、移動規制用突部１８ａと移動規制用凹部１９ａを設けている。
【００９７】
なお説明すれば、基本的には、シール部材４Ｅの一端面４ａと取付用凹部１５の底面１５ａが、外径側よりも内径側の突出量が小になるように傾斜形成されるが、特に、内径から所定の距離までの間は、逆に、外径側よりも内径側の突出量が大になるように傾斜形成される。
【００９８】
このことから、シール部材４Ｅの一端面４ａには突部１８ａが設けられることになり、これを移動規制用突部と呼ぶ。また、取付用凹部１５の底面１５ａには移動規制用突部１８ａと係合する凹部１９ａが設けられ、これを移動規制用凹部と呼ぶ。
【００９９】
図７（Ａ）は、結合金具本体１相互を正対させ、互いのシール面円筒体３Ｅに取付けられるシール部材４Ｅが対向している状態を示している。すなわち、結合金具本体１相互の結合前である。
【０１００】
図７（Ｂ）は、シール部材４Ｅ相互の突出端面４ｂを密接させてシールを確保し、かつ流体が流通していない無圧状態を示している。シール部材４Ｅによるシール性が確保される一方で、凹部空間が形成されないから、流体は結合金具本体内を円滑に流通して澱むことがなく、常に新鮮な流体が得られる。
【０１０１】
図７（Ｃ）は、配管２内部に負圧がかかった状態を示していて、シール部材４Ｅ相互の内周面は中心線方向に引張られて突出し、かつ結合金具本体１の前端面相互がより接近する。
【０１０２】
このようにして、配管２と結合金具本体１内に正圧がかかったときは勿論のこと、負圧がかかってもシール部材４Ｅ相互においてシール性が確保される一方で、流体は結合金具本体１内を円滑に流通する。
【０１０３】
特に、負圧状態でシール部材４Ｅは内径方向へ移動するよう付勢されるが、ここではシール部材４Ｅに移動規制用突部１８ａが設けられ、取付用凹部１５には移動規制用凹部１９ａが設けられて、互いに係合されているので、シール部材４Ｅの内径方向の位置ズレが確実に規制される。
【０１０４】
図８は、第６の実施の形態のシール面円筒体３Ｆと、このシール面円筒体３Ｆに取付けられるシール部材４Ｆとを示している。
【０１０５】
上記第１の実施の形態と同一部位については同番号を付していて、ここでは、第５の実施の形態と同様、負圧がかかった状態でシール部材４Ｆの内径側への位置ズレを規制することを特徴としている。
【０１０６】
すなわち、シール部材４Ｆの一端面４ａと取付用凹部１５の底面１５ａは、基本的には先に説明した傾斜形状と同様とし、かつ移動規制用突部１８ｂと移動規制用凹部１９ｂを備えてはいるが、ここでは内径側から外径側に亘って曲面状をなしている。この形状は、シールを取外して洗浄するときに、曲面なので洗浄し易いところに特徴がある。
【０１０７】
したがって、図８（Ａ）から図８（Ｃ）に亘って、先に説明した図７（Ａ）から図７（Ｃ）に亘る作用とほとんど同一の作用をなす。すなわち、配管２と結合金具本体１内に正圧あるいは負圧がかかっても、シール性が確保される一方で、流体は結合金具本体１内を円滑に流通する。
【０１０８】
特に、負圧状態でシール部材４Ｆは内径方向へ移動するよう付勢されるが、移動規制用突部１８ｂと移動規制用凹部１９ｂとで、シール部材４Ｆの内径方向の位置ズレが確実に規制される。
【０１０９】
図９は、第７の実施の形態のシール面円筒体３Ｇと、このシール面円筒体３Ｇに取付けられるシール部材４Ｇとを示している。
【０１１０】
上記第１の実施の形態と同一部位については同番号を付していて、ここでは、第５の実施の形態と同様、負圧がかかった状態でシール部材４Ｇの内径側への位置ズレを規制することを特徴としている。
【０１１１】
すなわち、シール部材４Ｇの一端面４ａと取付用凹部１５の底面１５ａは、基本的には先に説明した傾斜形状と同様とし、かつこれらの内径側から外径側に亘る中間部に、移動規制用突部１８ｃと移動規制用凹部１９ｃを備えている
したがって、図９（Ａ）から図９（Ｃ）に亘って、先に説明した図７（Ａ）から図７（Ｃ）に亘る作用とほとんど同一の作用をなす。すなわち、配管２と結合金具本体１内に正圧あるいは負圧がかかっても、シール性が確保される一方で、流体は結合金具本体１内を円滑に流通する。
【０１１２】
特に、負圧状態でシール部材４Ｇは内径方向へ移動するよう付勢されるが、移動規制用突部１８ｃと移動規制用凹部１９ｃとで、シール部材４Ｇの内径方向の位置ズレが確実に規制される。
【０１１３】
【発明の効果】
以上説明したように本発明によれば、結合金具本体相互をワンタッチで結合着脱でき作業性の向上を得られ、かつ結合状態でシール性を確保して高い信頼性が得られ、配管内部に流通する流体の液溜まりの発生する余地が全くなく、適用範囲の大幅な拡大が得られるなどの効果を奏する。
【図面の簡単な説明】
【図１】本発明の実施の形態の、配管類の結合金具を分離して示す側面図と断面図。
【図２】同実施の形態の、付勢機構を説明する結合金具本体の一部断面図。
【図３】第１の実施の形態の、シール部材のシール構造を説明する断面図。
【図４】第２の実施の形態の、シール部材のシール構造を説明する断面図。
【図５】第３の実施の形態の、シール部材のシール構造を説明する断面図。
【図６】第４の実施の形態の、シール部材のシール構造を説明する断面図。
【図７】第５の実施の形態の、シール部材のシール構造を説明する断面図。
【図８】第６の実施の形態の、シール部材のシール構造を説明する断面図。
【図９】第７の実施の形態の、シール部材のシール構造を説明する断面図。
【図１０】従来の、互いに異なるシール部材と、シール構造を説明する断面図。
【符号の説明】
１…結合金具本体、
２…配管、
５…嵌合突部、
６…嵌合凹部、
７…係止鉤部、
８…付勢機構、
４…シール部材、
５…取付用凹部、
１５ｃ…係止突起、
１６…係止凹部、
１７Ａ…負圧シール部、
１８ａ…移動規制用突部、
１９ａ…移動規制用凹部。[0001]
BACKGROUND OF THE INVENTION
The present invention is a pipe fitting composed of a pair of fitting metal bodies having the same structure without distinction between males and females, and in particular, an improvement in a seal structure that is attached to the fitting metal body and seals the fitting metal bodies together. About.
[0002]
[Prior art]
A plug-in type of hose, for example, a fire hose is known as a fitting, but there is a difference between male and female in the pair of fittings to be joined, and male fittings or female fittings cannot be connected to each other. .
[0003]
In particular, there are inconveniences in handling the parts that are required to be quick and reliable, such as fire extinguishing work, and two types of metal fittings, male fittings and female fittings with different structures, are manufactured. The manufacturing cost is high.
[0004]
In order to solve such a problem, a hose coupling fitting comprising a pair of coupling fitting bodies having the same shape and no distinction between males and females has been developed. For example, there is Japanese Patent Application No. 7-275835 filed by the present applicant, and patent registration (Japanese Patent No. 3107507) has already been completed.
[0005]
Recently, there is a demand for diverting this hose coupling bracket to, for example, coupling of piping constituting a food plant (so-called sanitary) or coupling of piping constituting a production line for pharmaceuticals or cosmetics. Is big.
[0006]
That is, there are advantages such that the coupling metal bodies can be coupled and detached with one touch to greatly improve workability and can be easily disassembled (separated) as necessary.
[0007]
[Problems to be solved by the invention]
Here, the problem is that the fluid guided into the pipe always flows smoothly in the coupling metal body. That is, it is required to be completely fresh as a fluid, and there should be no portion that accumulates even a little.
[0008]
In Japanese Patent Application No. 7-275835 shown in FIG. 10 (A), the sealing member b attached to the front end surface of the cylindrical sealing surface member a is in close contact with each other when the coupling metal bodies S are coupled to each other. In addition to sealing, a recessed space d is formed between the sealing member b and the end surface of the sealing surface member a.
[0009]
Naturally, the fluid guided in the pipe has a fluid pressure and is flowing smoothly, but the fluid once entering the recessed space d is difficult to exit from here. That is, the recessed space d becomes a fluid reservoir.
[0010]
FIG. 10B shows an improvement so that the seal member b1 does not come out from the seal surface member a1 in the axial direction. There is no change in the presence of the recessed space d at the end, and this is a fluid reservoir.
[0011]
Utility model registration No. 3064938 shown in FIG. 10 (C) is characterized by the form of seal packing b2 that presses and seals the joint surfaces of joints S1 of water supply hoses when they are joined together. A recessed space d is formed between b2 and the joint cylinder S1, and the fluid easily enters and becomes a reservoir.
[0012]
That is, any of the seal packings b, b1, and b2 is formed in a so-called tongue shape and protrudes from the mounting portion. Therefore, in a sealed state that is in close contact with each other, a recess is formed between the non-contact side and the mounting portion. A space is inevitable.
[0013]
For this reason, it is a fitting that can be attached and detached with a single touch and has excellent workability for attachment and detachment and secures sealing performance against the fitting body, but the application range is restricted by the formation of a fluid pool. There is a bug that is done.
[0014]
The present invention has been made paying attention to the above circumstances, and the purpose of the present invention is to allow the coupling metal bodies to be coupled and detached with one touch and to secure a sealing property in a coupled state, and to collect fluid. It is an object of the present invention to provide a pipe fitting that can always obtain a fresh fluid and expand the application range without any configuration.
[0015]
[Means for Solving the Problems]
In order to satisfy the above-described object, the pipe fitting according to the present invention includes a pipe fitting according to claim 1 in which a pair of fitting metal bodies are integrally connected to a pipe end or a pipe element, and predetermined along the peripheral edge of each fitting metal body. A plurality of fitting protrusions protruding in the axial direction are provided at intervals, a fitting recess is formed between the fitting protrusions, and protrudes in the circumferential direction on one side surface of the fitting protrusion. A locking collar portion is provided, a biasing mechanism for biasing elastic force in the circumferential direction is provided on the other side surface, a seal member made of an elastic material is attached to the front end surface of the coupling metal body, In the joint fittings for piping, in which the coupling metal bodies are detachably coupled with each other by the engagement between the locking hooks and the elastic biasing force of the biasing mechanism, and the seal members abut against each other by this coupling to maintain the seal. The member is provided on the front end surface of the coupling bracket body. It is attached to the mounting recess and has a ring shape with a predetermined inner diameter and outer diameter. One end surface and outer diameter surface of the ring are fitted into the bottom surface and the peripheral surface of the mounting recess, and the other end surface is from the front end surface of the fitting body. The sealing member that protrudes and is attached to the other coupling metal body is closely sealed, and the protruding end surface is formed so that the protruding amount is larger on the inner diameter side than on the outer diameter side,
One end surface of the sealing member and the bottom surface of the mounting recess of the coupling metal body are , One end surface of the sealing member The protrusion is inclined so that the inner diameter side is larger than the outer diameter side. In accordance with the inclination of one end face of the seal member, the protruding amount of the mounting recess bottom surface of the coupling metal body is inclined so that the inner diameter side is smaller than the outer diameter side. It is characterized by that.
[0016]
The material of the seal member is not limited to an elastic material such as rubber, and any material such as Teflon (registered trademark) or metal can be used as long as it is elastically deformed.
[0017]
According to a second aspect of the present invention, in the pipe fitting according to the first aspect, the outer diameter surface of the seal member and the peripheral surface of the mounting recess that engages with the outer diameter surface of the seal member are axially extended from the mounting recess of the seal member. A locking projection and a locking recess are provided to prevent slipping off.
[0018]
According to a third aspect of the present invention, in the pipe fitting according to the first aspect, the seal member is integrally provided with a negative pressure seal portion that seals closely when the inside of the pipe is in a negative pressure state. .
[0019]
According to a fourth aspect of the present invention, in the pipe fitting according to the first aspect, the movement restriction that restricts the movement of the seal member in the inner diameter direction when the inside of the pipe is in a negative pressure state on the bottom surface of the recessed portion for mounting and the one end surface of the seal member. And a movement restricting recess.
[0020]
By adopting the means for solving the above-described problems, according to the invention of claim 1, while ensuring the sealing performance in a state where the fitting main bodies are coupled with each other by one-touch, the fluid is stored in a configuration in which fluid does not accumulate. Always keep it fresh.
[0021]
According to the invention of claim 2, the sealability is ensured in a state in which the one-touch fitting main bodies are coupled to each other, the fluid does not accumulate, and the seal member is further prevented from coming off from the mounting recess. Make sure to prevent it.
[0022]
According to the invention of claim 3, the sealing performance is ensured in a state in which the coupling metal bodies are coupled with each other by one touch, and the structure does not accumulate fluid. There is no loss of sex.
[0023]
According to the fourth aspect of the present invention, a sealing property is ensured in a state in which the coupling metal bodies are coupled with each other by one-touch, and the structure does not collect fluid. The movement of the member in the inner diameter direction is reliably restricted.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0025]
FIG. 1 shows the separated fitting. This coupling metal fitting is composed of a pair of coupling metal bodies 1 and 1 having the same structure and no sex. Each coupling fitting main body 1 is connected and fixed to the end of the pipe 2 by an appropriate means such as brazing.
[0026]
The coupling metal body 1 has a substantially cylindrical body, and its outer diameter is formed in a taper shape whose diameter increases from the connecting portion of the pipe 2 to the tip, and the inner diameter is substantially the same as the inner diameter of the pipe 2 to be connected. Formed.
[0027]
A cylindrical sealing surface cylindrical body 3 is screwed from the tip of the inner diameter of the coupling metal body 1.
A seal member 4 made of an elastic material such as rubber packing is attached and fixed to the front end surface of the seal surface cylindrical body 3 as described later.
[0028]
The distal end of the coupling metal body 1 surrounds the seal surface cylindrical body 3, and a plurality of fitting projections 5 projecting in the axial direction are provided integrally therewith at a predetermined interval in the circumferential direction. A space between these fitting protrusions 5 is called a fitting recess 6.
[0029]
When the coupling metal bodies 1 are coupled to each other in the axial direction, the fitting protrusion 5 of one coupling metal body 1 is inserted into the fitting recess 6 of the other coupling metal body 1, and one coupling metal body A fitting projection 5 of the other coupling metal body 1 is inserted into one fitting recess 6 and is inserted in a complementary manner.
[0030]
In addition, the width dimension of the fitting recess 6 is formed wider than the width dimension of the fitting protrusion 5, and a gap is formed between the opposing side surfaces in a state where the fitting protrusion 5 is inserted into the fitting recess 6. Will exist.
[0031]
On one side surface 5 a of the fitting protrusion 5, a locking collar portion 7 protruding in the circumferential direction is integrally provided. Therefore, the engagement fitting main parts 1 are connected to each other in the axial direction by the engagement between the engaging hooks 7 protruding from the fitting protrusions 5.
[0032]
In addition, the locking surface of the locking collar portion 7 is inclined in an overhang shape by a predetermined angle with respect to the circumferential direction, and in a state in which these are engaged, the coupling metal body 1 is pulled away from each other by fluid pressure or the like. When the load is applied, the locking collar portions 7 are more strongly engaged with each other, and are configured to reliably prevent the coupling metal bodies 1 from coming off from each other.
[0033]
Furthermore, a gap exists between the front end surface of the fitting protrusion 5 and the inner wall surface of the fitting recess 6 in a state in which the locking collar portions 7 are engaged with each other. Therefore, the fitting protrusion 5 and the fitting recess 6 are movable from the state in which the locking collars 7 are engaged with each other so as to further enter each other in the axial direction.
[0034]
The other side surface 5 b of the fitting protrusion 5 where the locking collar portion 7 is not provided is inclined with respect to the axial direction of the coupling metal body 1. That is, the fitting protrusion 5 is formed in a tapered shape whose width dimension in the circumferential direction is narrowed from the base end corresponding to the bottom of the fitting recess 6 to the tip, and the side surface 5b is fitted to the fitting protrusion 5. A guide surface for insertion into the recess 6 is formed.
[0035]
A biasing mechanism 8 is provided on each of the tapered side surfaces 5b. As shown in an enlarged view in FIG. 2, the urging mechanism 8 includes a steel ball 10 as a urging member that is slidably accommodated in a cylindrical case member 9, and a projection that fits the steel ball 10. And a spring 11 that is elastically pressed and biased in a direction protruding from the side surface 5b.
[0036]
As shown in the figure, when the fitting protrusion 5 is fitted in the mating fitting recess 6, the biasing mechanisms 8 face each other and the steel balls 10 come into contact with each other and press each other. As a result, the side surfaces 5b on which the urging mechanisms 8 of the fitting protrusions 5 are provided are separated from each other, and are pressed and urged so that the opposite side surfaces 5a are in close contact with each other.
[0037]
Since the side surface 5a is provided with the locking hooks 7, the locking hooks 7, 7 are more firmly engaged with each other by the action of the biasing mechanisms 8, 8, and there is a problem due to impact or the like. Does not occur.
[0038]
In order to couple the coupling metal bodies 1, 1 configured in this way, the fitting recess 6 of the other coupling metal body 1 faces the fitting protrusion 5 of one coupling metal body 1. Inevitably, the fitting protrusion 5 of the other coupling metal body 1 faces the fitting recess 6 of one coupling metal body 1.
[0039]
What is necessary is just to move at least one coupling metal fitting main body 1 to an axial direction, hold | maintaining the attitude | position as it is. In the state where the fitting protrusion 5 is inserted into the fitting recess 6 between the coupling metal bodies 1 and 1, and the steel balls 10 and 10 of the urging mechanism 8 are in rolling contact with each other, 7 Engage with each other.
[0040]
The coupling metal bodies 1 and 1 are coupled to each other, and the pipes 2 and 2 are coupled to each other. At the same time, as will be described later, the sealing members 4 and 4 are in close contact with each other, and the sealing performance for the coupling metal bodies 1 and 1 and the pipes 2 and 2 is secured.
[0041]
When the pipe 2 is disassembled (separated) as necessary, any one of the fitting main bodies 1 may be urged to rotate in the circumferential direction. The rotation biasing direction at this time is a direction in which the side surfaces 5b and 5b provided with the biasing mechanism 8 are in close contact with each other.
[0042]
That is, the coupling metal body 1 is rotated against the pressing biasing force of the biasing mechanism 8, and when the side surfaces 5b and 5b are in close contact with each other, the locking collars 7 and 7 that have been in the engaged state so far are used. Mutually separate. The coupling metal bodies 1 and 1 are released from the coupled state, and the coupling metal bodies are free from each other and can be disassembled.
[0043]
Here, the pipe 2 is connected to the coupling metal body 1, but instead of the pipe, a pipe connection device such as a valve or a hose may be used, and the coupling metal body 1 is separated from the main body part and the fitting part. You may change so that it may comprise.
[0044]
That is, the pipe 2 is connected to one end of the main body, and the seal surface cylindrical body 3 is attached to the other end. The fitting projection 5, the fitting recess 6, the locking collar 7, and the biasing mechanism 8 are attached to the fitting portion. Form etc. As a result, when the coupling metal bodies 1 and 1 are coupled to each other and disassembled (separated), it is only necessary to operate the fitting portion, and the fitting portion can be easily handled to improve workability.
[0045]
Regardless of the configuration of the engagement metal fitting body 1, the sealing surface cylindrical body 3 and the sealing member 4 attached to the sealing surface cylindrical body 3 are as shown in FIG.
Details will be described below.
[0046]
FIG. 3 shows the seal surface cylinder 3A of the first embodiment and the seal member 4A attached to the seal surface cylinder 3A.
[0047]
A mounting recess 15 is provided on the front end surface of the sealing surface cylindrical body 3A in the circumferential direction, and the sealing member 4A is mounted on the mounting recess 15. The mounting recess 15 includes a bottom surface 15a formed obliquely in a direction projecting gradually from the inner diameter side to the outer diameter side of the seal surface cylindrical body 3A, and a peripheral surface 15b parallel to the axial direction of the seal surface cylindrical body 3A. I have. The inclination angle of the bottom surface 15a is set to 15 degrees, for example.
[0048]
Further, a locking projection 15c protruding in the inner diameter direction is integrally provided at the front end of the peripheral surface 15b of the mounting recess 15. The locking projections 15c may be provided over the entire circumferential surface, or may be provided at a predetermined interval in the circumferential direction.
[0049]
The seal member 4A has a ring shape having a predetermined thickness, an inner diameter, and an outer diameter. The inner diameter is formed to be the same as the inner diameter of the seal surface cylindrical body 3A, and the outer diameter is substantially the same as the diameter of the peripheral surface 15b of the mounting recess 15. Specifically, the seal member 4A is made larger by about 5%, and it is made difficult to come off by shrinking and attaching it.
[0050]
One end face 4a of the seal member 4A is Outer diameter side From Inner diameter side An inclined surface that gradually protrudes is formed, and this inclination angle is the same as the inclination angle of the mounting recess bottom surface 15a. Further, the peripheral surface of the seal member 4A is parallel to the axial direction, and a locking recess 16 is formed at the front end of the outer diameter so as to be recessed in the inner diameter direction.
[0051]
The locking recess 16 is formed so as to correspond to the size and shape of the locking projection 15c provided in the mounting recess 15. From this, the seal member 4A is fitted into the mounting recess 15 of the seal surface cylindrical body 3A. .
[0052]
Moreover, since the locking recess 16 of the seal member 4A is locked to the locking protrusion 15c of the seal surface cylindrical body 3A, the seal member 4A is prevented from coming out of the seal surface cylindrical body 3A in the axial direction. Yes.
[0053]
In a state where the seal member 4A is attached to the seal surface cylindrical body 3A, the one end surface 4b of the seal member 4A protrudes from the front end surface of the seal surface cylindrical body 3A. In other words, the protruding end surface 4b of the seal member 4A is formed to be inclined so that the protruding amount is larger on the inner diameter side than on the outer diameter side.
[0054]
The inclination angle formed on the protruding end face 4b of the seal member 4A is substantially the same as the inclination angle formed on the one end face 4a of the seal member 4A and the bottom face 15a of the mounting recess 15, and is set to, for example, 15 degrees. Yes.
[0055]
After all, the thickest part of the seal member 4A is the inner diameter side, and the thinner part is the outer diameter side, and both end surfaces are formed on inclined surfaces that are inclined downward from the inner diameter side to the outer diameter side. Will be.
[0056]
FIG. 3 (A) shows a state in which the coupling member main bodies 1 face each other and the seal members 4A attached to the seal surface cylindrical bodies 3A face each other. That is, it is before the coupling metal fitting bodies 1 are coupled to each other.
[0057]
In FIG. 3B, either one of the coupling metal bodies 1 is moved in the axial direction to couple the coupling metal bodies 1 to each other, so that the seal members 4A are elastically deformed to be in close contact with each other to ensure a sealing property. It shows the state.
[0058]
From the setting of the inclination angle on the projecting end surface 4b of the seal member 4A, the outer peripheral edge of the projecting end surface 4b remains without being in close contact with each other even if the seal members 4A are abutted with each other, and the front end surface of the seal surface cylindrical body 3A is predetermined. There is an interval.
[0059]
At this time, the fluid does not flow through the pipe 2 and the fitting body 1 and the inside is in a non-pressurized state. Further, since the seal member 4A is made of an elastic material, the entire volume does not change at all after the coupling. Therefore, the outer diameter side of the seal member 4A protrudes from the inclined surface 4b before joining to form a cross-section R shape, and the inner diameter side is elastically deformed so as to protrude in the central axis direction.
[0060]
FIG. 3C shows a state where the fluid is actually circulated in the pipe 2 and the fitting main body 1, and a predetermined pressure is applied to the inside. The inner diameter surface of the seal member 4A receives fluid pressure and is pressed to the outer diameter side, and the outer diameter side periphery protrudes outward by that amount.
[0061]
If the coupling metal bodies 1 are coupled to each other and the seal members 4A are brought into close contact with each other, the sealing performance is secured by the seal members 4A. On the other hand, since no recessed space is formed between the sealing member 4A and the sealing surface cylindrical body 3A, fluid does not accumulate, and the fluid flows smoothly and a fresh fluid is always obtained.
[0062]
FIG. 4 shows a seal surface cylinder 3B of the second embodiment and a seal member 4B attached to the seal surface cylinder 3B.
[0063]
The same parts as those in the first embodiment are given the same numbers, and the locking projections 15 provided on the seal surface cylindrical body 3B and the locking recesses 16 provided on the seal member 4B are projected from the seal member 4B. It is different that it is formed inside the end face 4b. That is, the outer peripheral side periphery of the seal member 4B covers the front end surface of the seal surface cylindrical body 3B, and the front end surface of the seal surface cylindrical body 3B is not exposed at all.
[0064]
From FIG. 4 (A) to FIG. 4 (C), the same action as the action from FIG. 3 (A) to FIG. 3 (C) is made. As a particularly different point, since a predetermined pressure is applied to the inside in the state where the fluid of FIG. 4C is circulated, the inner peripheral surface of the seal member 4B receives the fluid pressure and is pressed to the outer diameter side. Accordingly, the outer periphery on the outer diameter side protrudes outward from the sealing surface cylindrical body 3B.
[0065]
Then, if the coupling metal bodies 1 are coupled to each other and the seal members 4B are brought into close contact with each other, a sealing space is ensured, but a recess space is not formed between the seal member 4B and the seal surface cylindrical body 3B. Therefore, a fresh fluid can always be obtained through smooth circulation.
[0066]
FIG. 5 shows a seal surface cylindrical body 3C of the third embodiment and a seal member 4C attached to the seal surface cylindrical body 3C.
[0067]
The same parts as those in the first embodiment are denoted by the same reference numerals, and the feature here is that, for example, when the inside of the pipe 2 is steam-washed and the pipe is cooled and water vapor is condensed, the pipe 2 and the fitting Since negative pressure is applied in the main body 1, it is necessary to provide a seal structure that can handle not only positive pressure but also negative pressure.
[0068]
That is, the mounting recess 15 is provided on the front end surface of the seal surface cylindrical body 3C, and the seal member 4C is attached to the mounting recess 15, but the outer peripheral side peripheral end of the protruding end surface 4b of the seal member 4C is not changed. The negative pressure seal portion 17A is integrally provided along the portion.
[0069]
The negative pressure seal portion 17A is inclined to increase the amount of protrusion from the inner diameter side to the outer diameter side, contrary to the inclination from the inner diameter side to the outer diameter side of the protruding end surface 4b. The whole rests on a locking projection 15c provided at the front end of the sealing surface cylindrical body 3C.
[0070]
FIG. 5 (A) shows a state in which the coupling member main bodies 1 face each other and the seal members 4C attached to the seal surface cylindrical bodies 3C face each other. That is, it is before the coupling metal fitting bodies 1 are coupled to each other.
[0071]
In FIG. 5B, the coupling fitting main bodies 1 are coupled to each other, and the protruding end surfaces 4b of the seal member 4C are brought into close contact with each other. Although the sealing property is ensured, the fluid is in a non-pressure state where no fluid flows. The negative pressure seal portions 17A are also close to each other to some extent, and a substantially rhombus-shaped space portion is formed between the negative pressure seal portion 17A and the seal inclined surface 4b on the inner diameter side.
[0072]
When fluid is circulated through the pipe 2 and the coupling metal body 1, the inner peripheral surface is pressed to the outer diameter side by applying positive pressure to the seal member 4 </ b> C. Protrudes toward.
[0073]
Although the rhombus space portion beside the negative pressure seal portion 17A is deformed, it is not mistaken that it remains as a space portion. However, the fluid is not guided here, and the sealing performance by the seal member 4C is ensured. On the other hand, the recessed space is not formed and there is no liquid pool, so that the fluid smoothly flows in the coupling metal body 1.
[0074]
FIG. 5C shows a state in which, for example, the inside of the pipe 2 is steam-cleaned, and a negative pressure is applied to the pipe 2 and the coupling metal body 1.
When the inside of the pipe has a negative pressure, a load in a direction of pressing the coupling fitting main bodies 1 acts. Since there is a gap between the front end surface of the fitting projection 5 and the inner wall surface of the fitting recess 6 in a state where the locking collar portions 7 are engaged with each other, The fitting recess 6 further moves so as to enter each other in the axial direction.
[0075]
That is, since the seal body cylinders 3C move so as to press each other, the negative pressure seal portions 17A that are integrally provided on the outer diameter side of the seal member 4C are also elastically deformed by receiving a compressive force in the axial direction. Closer length is longer and seal power is increased.
[0076]
Considering the case where the inside of the pipe is evacuated, the negative pressure seal portion 17A is pressurized to about 0.1 MPa by atmospheric pressure, and the negative pressure seal portion 17A is pressed toward the inner diameter side.
[0077]
At this time, at the forefront of the locking projection 15c provided over the entire peripheral surface of the front end of the seal surface cylindrical body 3C to which the negative pressure seal portion 17A is attached, an inner diameter is formed from the outer diameter side of the seal surface cylindrical body 3C. There is provided a negative pressure seal receiving surface 15d which is formed obliquely in a direction protruding gradually over the side. The inclination angle of the negative pressure seal receiving surface 15d is set to 20 degrees, for example.
[0078]
On the other hand, the inclination angle formed on the negative pressure seal portion 17A provided on the outer diameter side of the seal member 4C is preferably slightly larger than the inclination angle formed on the protruding end surface 4b. Yes.
[0079]
Here, the sealing mechanism in a state where negative pressure is applied will be described with reference to FIG. When the two negative pressure seal portions 17A closely sandwiched between the opposing negative pressure seal receiving surfaces 15d are viewed as a unit, the cross-sectional shape is a wedge shape facing the inner diameter side of the seal surface cylindrical body 3C.
[0080]
A pressure of about 0.1 MPa due to atmospheric pressure is applied to the negative pressure seal portion 17A, and the negative pressure seal portion 17A is pressed toward the inner diameter side, so that it appears as if wedges have been driven in and exhibits a sealing effect. To do.
[0081]
This mechanism is the same even when receiving an internal pressure. When the two sealing members 4 sandwiched and intimately sandwiched by the bottom surface 15a of the mounting recess 15 shown in FIG. 3 are viewed as a unit, the cross-sectional shape is a wedge shape facing the outer diameter side of the sealing surface cylindrical body 3A. .
[0082]
Since a large pressure due to the internal pressure is applied to the seal member 4 and the seal member 4 is pressed to the outer diameter side, the wedge member is driven and a sealing effect is exhibited.
[0083]
Further, when comparing the size of the sealing member 4 for internal pressure and the negative pressure seal portion 17A, the negative pressure seal portion 17A is smaller, because the vacuum is compared with the pressure of the fluid reaching 3.0 MPa. This is because the atmospheric pressure that is sometimes received is as small as about 0.1 MPa.
[0084]
In other words, if the coupling metal bodies 1 are coupled to each other and the seal members 4C are brought into close contact with each other, not only when a positive pressure is applied to the pipe 2 and the coupling metal body 1, but also a negative pressure is applied. Sealing performance is ensured by the seal member 4C having the pressure seal portion 17A.
[0085]
On the other hand, since no recessed space is formed between the seal member 4C and the coupling metal body 1, fluid does not accumulate, and the fluid flows smoothly and a fresh fluid is always obtained.
[0086]
FIG. 6 shows a seal surface cylindrical body 3D of the fourth embodiment, Sealing surface cylinder The sealing member 4D attached to 3D is shown.
[0087]
The same parts as those in the first embodiment are denoted by the same reference numerals. Here, as in the third embodiment, a seal member 4D that can handle not only positive pressure but also negative pressure is provided. It is said.
[0088]
As the negative pressure seal portion 17B, a tongue-shaped member is integrally provided along the outer peripheral edge of the protruding end surface 4b of the seal member 4D. The tongue-like negative pressure seal portion 17B is separated from the locking protrusion 15c at the front end of the seal surface cylindrical body 3D.
[0089]
From FIG. 6 (A) to FIG. 6 (C), the same action as the action from FIG. 5 (A) to FIG. 5 (C) is performed. That is, in a state where a negative pressure is applied to the inside of the pipe 2 and the coupling metal body 1 shown in FIG. 6C, the negative pressure seal portion 17B is elastically deformed so that the close contact length becomes longer.
[0090]
In this way, not only when positive pressure is applied in the pipe 2 and the fitting main body 1, the sealing performance is secured even when negative pressure is applied, Sealing surface cylinder Since no recessed space is formed between the 3D and the 3D, fluid does not accumulate, and the fluid flows smoothly and a fresh fluid is always obtained.
[0091]
FIG. 7 shows a seal surface cylindrical body 3E of the fifth embodiment and a seal member 4E attached to the seal surface cylindrical body 3E.
[0092]
The same parts as those in the first embodiment are denoted by the same reference numerals, and here, the positional deviation in the inner diameter direction of the seal member 4E when negative pressure is applied is regulated.
[0093]
That is, in the embodiment described above, the one end surface 4a and the peripheral surface of the seal member 4 are fitted into the bottom surface 15a and the peripheral surface 15b of the mounting recess 15, and the bottom surface 15a and the one end surface 4a are from the outer diameter side. Is also formed so as to have a small protrusion on the inner diameter side.
[0094]
When positive pressure is applied to the sealing members 4 that are in close contact with each other, pressure is applied in the outer diameter direction. This direction is a direction that can be received by the inclined surfaces of the bottom surface 15a and the one end surface 4a. Absent.
[0095]
However, when receiving a negative pressure, the seal member 4 receives a pressure that moves toward the inner diameter side. This direction is also a direction along the inclination of the bottom surface 15a and the one end surface 4a, and the seal member 4 described above may be displaced in the inner diameter direction.
[0096]
Therefore, a movement restricting projection 18a and a movement restricting recess 19a are provided on a part of the bottom surface 15a of the mounting recess 15 provided on the seal surface cylindrical body 3E and the one end face 4a of the seal member 4E.
[0097]
In other words, basically, the one end face 4a of the seal member 4E and the bottom face 15a of the mounting recess 15 are inclined so that the protruding amount on the inner diameter side is smaller than the outer diameter side. On the contrary, during the period from the inner diameter to the predetermined distance, the protrusion is formed so that the protruding amount on the inner diameter side is larger than the outer diameter side.
[0098]
Therefore, the protrusion 18a is provided on the one end surface 4a of the seal member 4E, and this is called a movement restricting protrusion. Further, the bottom surface 15a of the mounting recess 15 is provided with a recess 19a that engages with the movement restricting protrusion 18a, which is referred to as a movement restricting recess.
[0099]
FIG. 7 (A) shows a state in which the coupling member main bodies 1 face each other and the seal members 4E attached to the seal surface cylindrical bodies 3E face each other. That is, it is before the coupling metal fitting bodies 1 are coupled to each other.
[0100]
FIG. 7B shows a non-pressure state in which the projecting end surfaces 4b of the seal members 4E are brought into close contact with each other to ensure a seal and no fluid is flowing. While the sealing performance by the seal member 4E is ensured, the recessed space is not formed, so that the fluid does not stagnate smoothly through the coupling metal body, and a fresh fluid is always obtained.
[0101]
FIG. 7C shows a state in which a negative pressure is applied to the inside of the pipe 2, the inner peripheral surfaces of the seal members 4 </ b> E are pulled out in the direction of the center line, and the front end surfaces of the fitting body 1 are Get closer.
[0102]
In this way, not only when positive pressure is applied in the pipe 2 and the fitting main body 1, but also when the negative pressure is applied, the sealing performance is secured between the seal members 4E, while the fluid is in the fitting main body. Smoothly circulates in 1
[0103]
In particular, the seal member 4E is urged to move in the inner diameter direction in the negative pressure state. Movement restricting projection 18a Is provided in the mounting recess 15. Movement restricting recess 19a Are provided and engaged with each other, so that the positional deviation of the seal member 4E in the inner diameter direction is reliably regulated.
[0104]
FIG. 8 shows a seal surface cylindrical body 3F of the sixth embodiment and a seal member 4F attached to the seal surface cylindrical body 3F.
[0105]
The same number is attached | subjected about the same site | part as the said 1st Embodiment, and the position shift to the internal diameter side of the sealing member 4F is here in the state which applied the negative pressure like 5th Embodiment. It is characterized by regulation.
[0106]
That is, the one end surface 4a of the seal member 4F and the bottom surface 15a of the mounting recess 15 are basically the same as the inclined shape described above, and are provided with the movement restricting protrusion 18b and the movement restricting recess 19b. However, in this case, a curved surface is formed from the inner diameter side to the outer diameter side. This shape is characterized in that it is easy to clean because it is a curved surface when the seal is removed and cleaned.
[0107]
Therefore, from FIG. 8 (A) to FIG. 8 (C), the same action as the action from FIG. 7 (A) to FIG. 7 (C) described above is performed. That is, even if a positive pressure or a negative pressure is applied to the pipe 2 and the coupling metal body 1, the sealing property is ensured, but the fluid smoothly flows through the coupling metal body 1.
[0108]
In particular, the seal member 4F is urged to move in the inner diameter direction in the negative pressure state, but the displacement in the inner diameter direction of the seal member 4F is reliably regulated by the movement restricting projection 18b and the movement restricting recess 19b. Is done.
[0109]
FIG. 9 shows a seal surface cylindrical body 3G of the seventh embodiment and a seal member 4G attached to the seal surface cylindrical body 3G.
[0110]
The same parts as those in the first embodiment are denoted by the same reference numerals. Here, as in the fifth embodiment, the displacement of the seal member 4G toward the inner diameter side in a state where a negative pressure is applied. It is characterized by regulation.
[0111]
That is, the one end surface 4a of the seal member 4G and the bottom surface 15a of the mounting recess 15 are basically the same as the inclined shape described above, and the movement is restricted to the intermediate portion from the inner diameter side to the outer diameter side. The projection 18c for movement and the recessed part 19c for movement control are provided.
Therefore, the operation from FIG. 9A to FIG. 9C is almost the same as the operation from FIG. 7A to FIG. 7C described above. That is, even if a positive pressure or a negative pressure is applied to the pipe 2 and the coupling metal body 1, the sealing property is ensured, but the fluid smoothly flows through the coupling metal body 1.
[0112]
In particular, the seal member 4G is urged to move in the inner diameter direction in a negative pressure state, but the displacement in the inner diameter direction of the seal member 4G is reliably regulated by the movement restricting projection 18c and the movement restricting recess 19c. Is done.
[0113]
【The invention's effect】
As described above, according to the present invention, it is possible to connect / disconnect the coupling metal bodies with one touch to improve workability, and to ensure sealing performance in the coupled state, to obtain high reliability, and to circulate inside the piping. There is no room for the occurrence of a fluid pool, and the application range can be greatly expanded.
[Brief description of the drawings]
FIGS. 1A and 1B are a side view and a cross-sectional view separately showing a pipe fitting according to an embodiment of the present invention.
FIG. 2 is a partial cross-sectional view of a coupling metal body for explaining an urging mechanism according to the embodiment;
FIG. 3 is a cross-sectional view illustrating a seal structure of a seal member according to the first embodiment.
FIG. 4 is a cross-sectional view illustrating a seal structure of a seal member according to a second embodiment.
FIG. 5 is a cross-sectional view illustrating a seal structure of a seal member according to a third embodiment.
FIG. 6 is a cross-sectional view illustrating a seal structure of a seal member according to a fourth embodiment.
FIG. 7 is a cross-sectional view illustrating a seal structure of a seal member according to a fifth embodiment.
FIG. 8 is a cross-sectional view illustrating a seal structure of a seal member according to a sixth embodiment.
FIG. 9 is a cross-sectional view illustrating a seal structure of a seal member according to a seventh embodiment.
FIG. 10 is a cross-sectional view illustrating a conventional seal member and a seal structure that are different from each other.
[Explanation of symbols]
1 ... Body body,
2 ... Piping,
5 ... fitting protrusion,
6 ... fitting recess,
7: Locking collar,
8 ... Energizing mechanism,
4 ... Sealing member,
5 ... Mounting recess,
15c ... locking protrusion,
16 ... locking recess,
17A ... negative pressure seal part,
18a ... Movement restricting projection,
19a: Movement restricting recess.

Claims

A pair of coupling metal fittings are connected integrally to the pipe end or pipe element,
A plurality of fitting protrusions protruding in the axial direction with a predetermined interval along the peripheral end of each coupling metal body are provided, and a fitting recess is formed between these fitting protrusions,
A locking collar portion protruding in the circumferential direction is provided on one side surface of the fitting protrusion, and a biasing mechanism for biasing elastic force in the circumferential direction is provided on the other side surface,
A sealing member made of an elastic material is attached to the front end surface of the coupling metal body,
The coupling metal bodies are detachably coupled with each other by the engagement between the locking collars of the coupling metal bodies and the elastic urging force of the urging mechanism, and the seal members are brought into contact with each other to maintain the seal. For pipe fittings,
The seal member is attached to a mounting recess provided on a front end surface of the coupling metal body,
The seal member has a ring shape having a predetermined inner diameter and outer diameter, and one end surface and an outer diameter surface thereof are fitted into the bottom surface and the peripheral surface of the mounting recess, and the other end surface projects from the front end surface of the fitting body. The seal member attached to the other coupling bracket body is tightly sealed,
The protruding end surface of the sealing member is formed so that the protruding amount is larger on the inner diameter side than on the outer diameter side,
Mounting recess bottom surface of the one end face and fitting the body of the seal member, the protruding amount of the one end face of the seal member inner diameter side than the outer diameter side is inclined formed so as to be larger, the inclination of the end face of the sealing member together, fitting the pipes projecting amount of the mounting recess bottom surface of the fitting body inner diameter side than the outer diameter side, characterized in Rukoto is inclined formed so as to be small in.

A locking protrusion and a locking recess for preventing the seal member from coming off from the mounting recess in the axial direction are provided on the outer diameter surface of the seal member and the mounting recess circumferential surface engaging with the outer diameter surface of the seal member. The pipe fitting according to claim 1, wherein the pipe fitting is provided.

2. The pipe fitting according to claim 1, wherein the seal member is integrally provided with a negative pressure seal portion that seals in close contact with each other when the inside of the pipe is in a negative pressure state.

The mounting recess bottom surface and one end surface of the seal member are provided with a movement restricting protrusion and a movement restricting recess for restricting movement of the seal member in the inner diameter direction when the inside of the pipe is in a negative pressure state. The joint fitting for piping according to claim 1.