JP4676086B2

JP4676086B2 - Fitting with swing valve

Info

Publication number: JP4676086B2
Application number: JP2001137595A
Authority: JP
Inventors: 章堀本
Original assignee: Sakura Rubber Co Ltd
Current assignee: Sakura Rubber Co Ltd
Priority date: 2001-05-08
Filing date: 2001-05-08
Publication date: 2011-04-27
Anticipated expiration: 2021-05-08
Also published as: JP2002333089A

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば、液体輸送用配管、気体輸送用配管あるいは可撓性を有するホース等の相互の接続または配管やホースとポンプその他の機器とを接続するための結合部分に設けられるスイングバルブを備えた結合金具に関する。
【０００２】
【従来の技術】
一般に、液体輸送用配管や気体輸送用配管の相互の接続または配管とポンプその他の機器とを接続するための結合部分に設けられる接合金具には日本工業規格ＪＩＳＢ２０５１に示されるスイングバルブが設けられている。
【０００３】
スイングバルブは、バルブケーシングの内部に円板状の弁体が枢支軸に回動自在に枢支されている。バルブケーシングの内部には流路と直交する方向に弁座が設けられ、弁体が枢支軸を支点とし、弁体が弁座に接合して流路を閉塞する位置と弁体がバルブケーシングの内壁に退避して流路を開放する位置との間で回動するようになっている。
【０００４】
スイングバルブは、弁体が付勢ばねによって閉弁方向に付勢され、弁体に開弁方向に流体圧力が加わったときに付勢ばねの付勢力に打ち勝って開弁する形式と、バルブケーシングの外部からの操作によって弁体を回動して開弁・閉弁する形式のものがある。
【０００５】
【発明が解決しようとする課題】
しかしながら、従来のスイングバルブは、開弁時に弁体がバルブケーシングの内壁方向に退避するようになっているため、開弁時に弁体が流路内に存在している。しかも、弁体は円板状であるのに対し、バルブケーシングの内壁は円筒状である。従って、開弁状態であっても、弁体がバルブケーシングの内壁から、流路内に突出しているため、弁体が流通抵抗となり、圧力損失が大きいという問題がある。
【０００６】
本発明は、前記事情に着目してなされたもので、その目的とするところは、開弁時にスイングバルブが筒本体の内周面と一致し、筒本体の通路を流通する流体の圧力損失を低減することができるスイングバルブを備えた結合金具を提供することにある。
【０００７】
【課題を解決するための手段】
前記目的を達成するために、請求項１の発明は、ホース相互またはホースと他の機器とを結合する一対の円筒状の結合金具本体と、前記結合金具本体の周方向に配列され軸方向に突設した複数の嵌合突部とこれらの間に形成された嵌合凹部と、前記一対の結合金具本体の嵌合突部と嵌合凹部は互いに相手側の結合金具本体の嵌合凹部と嵌合突部に軸方向に嵌合し、これら嵌合突部には相手側の結合金具本体の嵌合突部に周方向に係止して軸方向の移動を規制し、これら一対の結合金具本体を軸方向に係止する係止鉤部と、少なくとも内面が前記結合金具本体の軸心に対して直角方向に前記結合金具本体の側壁を前記結合金具本体の直径と略同径に切り抜いた形の形状で形成され、前記結合金具本体の内周面の曲率と一致する凹湾曲面を有し、展開形状が略楕円形状のスイングバルブと、前記スイングバルブの長手方向と直交する方向の一端部を枢支部として前記スイングバルブを前記結合金具本体に回動自在に枢支し、前記結合金具本体の軸心と直交して前記結合金具本体の内部を閉塞する第１の位置と、前記結合金具本体の軸心と平行して前記凹湾曲面が前記結合金具本体の内周面と一致して位置することにより前記結合金具本体の内部を開放する第２の位置との間で前記スイングバルブを回動可能な操作手段と、前記結合金具本体の内周面に設けられ、前記スイングバルブが前記第１の位置に位置したときに該第１の位置で前記結合金具本体の内周面とスイングバルブの外周面との間をシールするシール部材と、を具備し、前記操作手段は、前記スイングバルブを前記第２の位置から前記第１の位置に向けて回動する向きに付勢する付勢ばねと、前記一対の結合金具本体の嵌合突部と嵌合凹部が互いに相手側の結合金具本体の嵌合凹部と嵌合突部に軸方向に嵌合するときに前記スイングバルブを前記第１の位置から前記第２の位置に回動して前記スイングバルブを開放するスリーブと、を含むことを特徴とするスイングバルブを備えた結合金具である。
【０００８】
請求項２の発明は、請求項１記載の結合金具において、前記結合金具本体の内周面には、前記スイングバルブが第２の位置に位置したとき、前記結合金具本体の内周面に前記スイングバルブの凹湾曲面が一致するように前記スイングバルブを格納する逃げ部が設けられていることを特徴とする。
【０００９】
請求項３の発明は、請求項１または請求項２に記載の結合金具において、前記スイングバルブは、前記結合金具本体の軸心に対して直角方向に前記結合金具本体の側壁を前記結合金具本体の直径と略同径に切り抜いて形成されていることを特徴とする。
【００１０】
請求項４の発明は、請求項１、請求項２または請求項３に記載のスイングバルブを備えた結合金具において、前記スリーブは、前記結合金具本体の内面に前記結合金具本体の軸方向に進退自在に設けられ、前記結合金具本体の嵌合突部と嵌合凹部が相手側の結合金具本体の嵌合凹部と嵌合突部に軸方向に嵌合するときに相手側の結合金具本体のスリーブに突き当たり、前記結合金具本体内に押し込まれることにより、前記スイングバルブを第１の位置から第２の位置に回動する操作を行うことを特徴とする。
【００１１】
請求項５の発明は、請求項１または請求項４に記載の結合金具において、前記スリーブは、前記結合金具本体の内周面に接する円筒状のものであり、更に後端部が前記スイングバルブの湾曲形状に倣って凹曲面と凸曲面とが連続した波形形状であることを特徴とする。
請求項６の発明は、請求項１乃至５のいずれかに記載のスイングバルブを備えた結合金具において、前記スリーブの内周面と、前記結合金具本体の内周面と、第２の位置にあるときのスイングバルブの凹湾曲面とが略一致する径となることを特徴とする。
【００１２】
前記構成によれば、一対の結合金具を離脱すると、スイングバルブが付勢手段によって結合金具本体の軸心と直交する方向に回動し、結合金具本体の通路をスイングバルブによって閉塞するとともに、スイングバルブの外周面がシール部材によってシールされて水密状態となる。
【００１３】
また、一対の結合金具を結合すると、スリーブ等の操作手段によってスイングバルブを付勢力に抗して押圧し、スイングバルブを結合金具本体の軸心と平行状態となって筒本体の通路が開放される。このとき、スイングバルブの内周面は結合金具本体の内周面と一致し、通路を流通する流体の圧力損失を低減することができる。
【００１４】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。
【００１５】
図１〜図４は第１の実施形態を示し、本発明のスイングバルブを備えた結合金具を消防ホースの結合金具に適用した場合のものである。図４に基づいて結合金具について説明すると、この結合金具は、同一構造の一対の結合金具本体１ａ，１ｂから構成されており、これら結合金具本体１ａ，１ｂにはそれぞれ消防ホース２ａ，２ｂが接続されている。
【００１６】
これらの結合金具本体１ａ，１ｂは、それぞれ筒本体３を備えており、これら筒本体３は略円筒形をなし、筒本体３の前端部には、それぞれ複数、例えば６個の嵌合突部８が一体に突設されている。これらの嵌合突部８は、周方向に等間隔に配列され、軸方向に突出している。また、これらの嵌合突部８の間は、嵌合凹部９として形成されており、これらの結合金具本体１ａ，１ｂが軸方向に衝合された場合には、一方の結合金具本体１ａの嵌合突部８が他方の結合金具本体１ｂの嵌合凹部９内に嵌合し、また他方の結合金具本体１ｂの嵌合突部８が一方の結合金具本体１ａの嵌合凹部９内に嵌合し、互いに相補形に嵌合する。
【００１７】
なお、この第１の実施形態のものでは、嵌合凹部９の幅は嵌合突部８の幅よりやや広く形成されている。従って、これら嵌合突部８はこれらの嵌合凹部９内に軸方向に嵌合するとともに、周方向にも所定の量だけ回動自在である。
【００１８】
そして、嵌合突部８の一方の側面には段形鉤状の係止鉤部８ａがそれぞれ形成されており、これらは互いに相手側の嵌合突部８の係止鉤部８ａと周方向に係合するように構成されている。従って、これらの嵌合突部８が相手側の嵌合凹部９内に軸方向に嵌合した状態で、これら結合金具本体１ａ，１ｂを互いに回動させてこれら嵌合突部８の一方の側面が互いに近接すると、これらの係止鉤部８ａが互いに係合して軸方向の係止をなし、これら結合金具本体１ａ，１ｂが互いに結合される。
【００１９】
また、これら嵌合突部８の他方の側面の先端角部は円弧状に形成されてガイド部１２が形成されており、これらが嵌合する際には、これらのガイド部１２が互いに当接する。
【００２０】
また、これら係合突部８の他方の側面には、それぞれ付勢機構１０が設けられている。これらの付勢機構１０は、円筒形のケース部材１４内に突没自在に収容された付勢部材例えば鋼球１５と、この鋼球１５を突出方向に付勢するスプリング（図示しない）とから構成されており、これらの付勢機構１０はこれら嵌合突部８の他方の側面に埋め込まれている。従って、これらの嵌合突部８が相手側の嵌合凹部９内に嵌合されると、前記鋼球１５が互いに当接して互いに押圧付勢し、これら嵌合突部８の他方の側面を互いに離反するように付勢し、この結果これら嵌合突部８の一方の側面は互いに近接するように付勢され、上述のようにこれらの一方の側面の係止鉤部８ａが互いに係合するように付勢される。
【００２１】
また、図１〜図３に示すように、筒本体３の前端部の内周面には後述するスリーブ１８の後端部の形状に倣って波状をなす環状溝３ａが設けられ、この環状溝３ａには断面が略Ｃ字状で、水圧が加わると筒本体３の軸心方向に拡張してシール効果を発揮するパッキン１７が装着されている。このパッキン１７より筒本体３の前端部の内周面には円筒状のスリーブ１８が軸方向に進退自在に嵌挿されている。このスリーブ１８は前端部が肉厚部１８ａで、後端部が肉薄部１８ｂであり、肉厚部１８ａと肉薄部１８ｂとの境界部における外周面には段差部１８ｃが形成されている。さらに、スリーブ１８の後端部は後述するスイングバルブ２２の湾曲形状に倣って凸部と凹部とが連続する波状に形成されている。
【００２２】
前記筒本体３の内周面にはスリーブ１８の肉厚部１８ａ及び肉薄部１８ｂが嵌合される浅い凹部１９ａと深い凹部１９b及び段差部１８ｃと対向する段差部１９cが設けられ、スリーブ１８の内周面は筒本体３の内周面と一致している。そして、スリーブ１８の前進時にはその前端が筒本体３の前端と一致した位置にあり、後退時にはスリーブ１８の段差部１８ｃが筒本体３の段差部１９ｃに当接してスリーブ１８のストロークが規制されるようになっている。
【００２３】
筒本体３の外周壁には矩形状の凹陥部２０が設けられ、この凹陥部２０の底面には逃げ部としての円形の開口部２１が設けられている。この開口部２１は筒本体３の軸心に対して直角方向に筒本体３の側壁を筒本体３の直径と略同径に切り抜いた形状である。
【００２４】
また、筒本体３の開口部２１には該開口部２１と同一形状のスイングバルブ２２が設けられている。スイングバルブ２２は、その内周面が筒本体３の内周面の曲率と一致する凹湾曲面を有し、展開形状が略楕円形状をなしている。さらに、スイングバルブ２２の外周面にはその長手方向と直交する方向にブラケット２３が固定されている。
【００２５】
また、筒本体３の前端側に位置する凹陥部２０には両端部が軸受２４に回転自在に支持されたヒンジ軸２５が設けられ、このヒンジ軸２５は中間部が屈曲されて開口部２１方向に突出しており、この突出部がスイングバルブ２２のブラケット２３に固定されている。従って、スイングバルブ２２は枢支部としてのヒンジ軸２５を支点として回動自在であり、筒本体３の軸心と直交して筒本体３の内部を閉塞する位置と筒本体３の軸心と平行して凹湾曲面が筒本体３の内周面と一致して筒本体３の内部を開放する位置との間（回動角９０°）で回動するようになっている。
【００２６】
さらに、ヒンジ軸２５にはスイングバルブ２２が筒本体３の内部を閉塞する方向に付勢する付勢ばね（図示しない）が設けられていると共に、凹陥部２０は着脱可能な蓋体２９によって閉塞されている。
【００２７】
また、スイングバルブ２２が筒本体３の軸心と直交して筒本体３の内部を閉塞する位置になったとき、スイングバルブ２２の外周面２２ａはパッキン１７と圧接して水密にシールされるようになっている。
【００２８】
なお、パッキン１７の形状は、本実施形態のように、「断面が略Ｃ字状で、筒本体３側に取り付けるもの」に限定されるものではない。例えば、「スイングバルブ２２の展開形状である略楕円形状と同じ形で、一回り大きいゴム板のパッキンをスイングバルブ２２とブラケット２３の間に挟んでスイングバルブ２２に接着剤で接着する」ことによって、スイングバルブ２２の全周に亘ってパッキンが少しはみ出した状態にする。このパッキンは圧力が加わる側に位置するので、この圧力によって筒本体３の内径壁面とスイングバルブ２２の隙間に押し付けられて水密に確保できる。また、このゴム板状パッキンは弾性変形するのでスイングバルブ２２の開閉操作の邪魔をすることもない。
【００２９】
さらに、スイングバルブ２２の枢支部と反対側に位置する筒本体３の内壁には筒本体３の軸方向と直交する方向にピン穴２６が設けられ、このピン穴２６にはスプリング２７によって突出する方向にストッパピン２８が設けられている。ストッパピン２８はスイングバルブ２２が筒本体３の軸心と直交して筒本体３の内部を閉塞する位置になる位置で停止させるようになっている。さらに、ストッパピン２８の先端部にはスリーブ１８に対向する斜面２８ａが形成され、スリーブ１８の後退に伴って斜面２８ａと摺動してストッパピン２８がスプリング２７を圧縮しながら没入するようになっている。
【００３０】
次に、前述のように構成された結合金具の作用を説明する。
【００３１】
結合金具本体１ａ，１ｂが離脱状態では、図２及び図３に示すように、付勢ばねの付勢力によってスイングバルブ２２がヒンジ軸２５を支点として筒本体３の軸方向と直交する方向に回動し、ストッパピン２８に当接している。そして、スイングバルブ２２の外周面２２ａはパッキン１７と圧接して水密にシールされているとともに、パッキン１７の内側に筒本体３内の水圧が加わってパッキン１７を拡張するため、確実な水密構造となる。
【００３２】
これらの結合金具本体１ａ，１ｂを結合する際には、図１に示すように、これら結合金具本体１ａ，１ｂを略同心状に対向させ、これらを軸方向に衝合し、嵌合突部８を相手側の嵌合凹部９内に嵌合する。この場合、嵌合突部８はいずれも同一の形状であるとともに、６個が等間隔で配列されているので、これら嵌合突部８は相手側の任意の嵌合凹部９と嵌合することができる。従って、これら嵌合突部８と相手側の嵌合凹部９とを対向させるには、最大で約３０°だけこれら結合金具本体１ａ，１ｂを相対的に回動させるだけですみ、これらに接続されている消防ホース２ａ，２ｂを過度に捩じる必要はなく、操作が容易である。
【００３３】
そして、これらが軸方向に嵌合される際には、嵌合突部８の一方の側面の先端部同志が当接し、他方の側面相互の間隙が少なくなる。しかし、この他方の側面の先端角部にはガイド部１２が形成されているので、この円弧状のガイド部１２が互いに当接して互いに滑らかに案内するので、この嵌合の際にこれらの嵌合突部８の先端部が引っ掛かることが防止される。
【００３４】
このようにして嵌合突部８を軸方向に嵌合すると、これらの他方の側面に設けられている付勢機構１０の鋼球１５が互いに押圧し、これら嵌合突部８の一方の側面が互いに近接するように付勢する。そして、これら一方の側面に形成されている係止鉤部８ａが互いに相手の先端部を乗り越えると、付勢機構１０の付勢力によりこれら係止鉤部８ａが互いに周方向に係合して軸方向に移動を不能とし、この状態でこれら一対の結合金具本体１ａ，１ｂが結合される。
【００３５】
結合金具本体１ａ，１ｂが結合されると、結合金具本体１ａ，１ｂ内のスリーブ１８相互は前端で突き当たるため、スリーブ１８は後退する。スリーブ１８の後退に伴ってスリーブ１８の後端がストッパピン２８の斜面２８ａに当接し、ストッパピン２８をスプリング２７の付勢力に抗して押し下げる。さらに、スリーブ１８の後端はスイングバルブ２２に当接し、スイングバルブ２２を付勢ばねの付勢力に抗して押圧し、ヒンジ軸２５を支点として回動させる。
【００３６】
そして、図１に示すように、スリーブ１８の段差部１８cが段差部１９ｃに当接する位置に達すると、スイングバルブ２２は筒本体３の軸心と平行状態となって筒本体３の通路が開放状態となると共に、筒本体３の開口部２１をスイングバルブ２２によって閉塞する状態となる。従って、スイングバルブ２２の内周面は筒本体３の内周面と一致し、筒本体３の内周面に段差がないため、筒本体３の通路を流通する流体の圧力損失を低減できる。
【００３７】
次に、結合状態にある結合金具本体１ａ，１ｂを結合解除する場合には、これら結合金具本体１ａ，１ｂを両手で把持し、互いに反対方向にねじる。これにより、これら結合金具本体１ａ，１ｂは、付勢機構１０の付勢力に抗して回動し、係止状態にある係止鉤部８ａの係合が解除される。そして、これとともにこれら結合金具本体１ａ，１ｂを互いに軸方向に引き離せば、これらは結合解除される。
【００３８】
結合金具本体１ａ，１ｂの結合が解除されると同時に、スイングバルブ２２は付勢ばねの付勢力によってヒンジ軸２５を支点として回動し、前述と同様に筒本体３の通路をスイングバルブ２２によって閉塞する。
【００３９】
前記第１の実施形態のものは、一対の結合金具本体１ａ，１ｂは全く同一の形状、寸法であるので、消防ホースの両端部およびポンプの送水口等のこれらの結合金具本体１ａ，１ｂを取り付けておけば、雌雄の別なく任意に結合することができ、雄雌の種類を間違えて結合不能となるような可能性は排除することができる。また、これらの結合金具本体１ａ，１ｂは全く同一の構造のものを１種類だけ製造すれば良いので、製造コストも低くてすむ。
【００４０】
また、この実施形態のものは、嵌合突部８と嵌合凹部９との嵌合に周方向に隙間すなわち遊びがあり、嵌合の際に多少の位置ずれが許容されるので操作が容易であるとともに、砂等の異物の噛み込みによって嵌合不能となることもないので、信頼性も高い。
【００４１】
なお、本発明は前記の各実施形態には限定されない。例えば、前記の実施形態は、消防ホース同志を結合する結合金具について説明したが、本発明は消防ホースとポンプの送水口とを連結する結合金具、その他の消防用の結合金具にも適用できることはもちろんである。
【００４２】
さらに、本発明は消防ホースに限らず、その他の用途に使用されるホースや配管類の結合金具としても適用できることはもちろんである。
【００４３】
【発明の効果】
本発明の結合金具は、雌雄の区別がないので任意に結合でき、結合作業が容易であるとともに、消防ホースの結合金具の場合には、消火作業等の際に結合金具の種類が同じ種類のため結合不能となるような可能性を一切排除でき、操作が容易で信頼性が高い。さらに、同一構造の一対の結合金具本体から構成されているので、一種類の結合金具本体のみを製作すればよく、製造コストを低減することができる。
【００４４】
さらに、本発明の筒本体の通路を開閉するスイングバルブは、筒本体の軸心に対して直角方向に筒本体の側壁を筒本体の直径と略同径に切り抜いた形状で、内周面が筒本体の内周面の曲率と一致する凹湾曲面を有する展開形状が略楕円形状である。従って、開弁状態においては、スイングバルブの内周面が筒本体の内周面と一致し、筒本体の内周面に段差ができないため、通路を流通する流体の圧力損失を低減できるという効果がある。
【図面の簡単な説明】
【図１】本発明の第１の実施形態のスイングバルブを備えた結合金具を示し、（ａ）はスイングバルブが開弁状態にあるときの一部切欠した平面図、（ｂ）は同縦断側面図。
【図２】同実施形態のスイングバルブを備えた結合金具を示し、スイングバルブが閉弁状態にあるときの拡大した縦断側面図。
【図３】同実施形態のスイングバルブを備えた結合金具を示し、（ａ）はスイングバルブが閉弁状態にあるときの一部切欠した平面図、（ｂ）は同縦断側面図。
【図４】同実施形態を示し、（ａ）は結合金具の斜視図、（ｂ）はＡ部の拡大した斜視図。
【符号の説明】
１ａ，１ｂ…結合金具本体
３…筒本体
８…嵌合突部
９…嵌合凹部
１７…パッキン（シール部材）
１８…スリーブ（操作手段）
２１…開口部（逃げ部）
２２…スイングバルブ
２５…ヒンジ軸（枢支部）[0001]
BACKGROUND OF THE INVENTION
The present invention provides, for example, a swing valve provided in a connecting part for connecting a pipe, a hose and a pump or other devices to each other such as a liquid transport pipe, a gas transport pipe or a flexible hose. The present invention relates to a provided fitting.
[0002]
[Prior art]
Generally, a swing valve shown in Japanese Industrial Standard JIS B 2051 is provided in a joint fitting provided in a connecting part for connecting a liquid transport pipe or a gas transport pipe or connecting a pipe and a pump or other equipment. It has been.
[0003]
In the swing valve, a disc-like valve body is pivotally supported on a pivot shaft inside a valve casing. A valve seat is provided in the valve casing in a direction orthogonal to the flow path, the valve body is pivoted on the pivot shaft, the valve body is joined to the valve seat and the flow path is closed, and the valve body is the valve casing. It revolves between the position where it is retracted to the inner wall and the flow path is opened.
[0004]
The swing valve is configured such that the valve body is biased in the valve closing direction by the biasing spring, and when the fluid pressure is applied to the valve body in the valve opening direction, the valve body overcomes the biasing force of the biasing spring and opens the valve casing. There is a type that opens and closes the valve body by rotating it from the outside.
[0005]
[Problems to be solved by the invention]
However, the conventional swing valve is configured such that the valve body is retracted toward the inner wall of the valve casing when the valve is opened, so that the valve body exists in the flow path when the valve is opened. In addition, the valve body has a disc shape, whereas the inner wall of the valve casing has a cylindrical shape. Therefore, even in the valve open state, the valve body protrudes from the inner wall of the valve casing into the flow path, so that the valve body has a flow resistance and there is a problem that the pressure loss is large.
[0006]
The present invention has been made paying attention to the above circumstances. The purpose of the present invention is to reduce the pressure loss of the fluid flowing through the passage of the cylinder main body when the swing valve is coincident with the inner peripheral surface of the cylinder main body when the valve is opened. An object of the present invention is to provide a coupling fitting having a swing valve that can be reduced.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention of claim 1 is characterized in that a pair of cylindrical coupling metal bodies for coupling hoses with each other or a hose and other equipment, and an axial direction arranged in the circumferential direction of the coupling metal body. A plurality of fitting protrusions projecting from each other, a fitting recess formed between them, and a fitting protrusion and a fitting recess of the pair of coupling metal bodies are a fitting concave part of the mating coupling metal body on the other side. The fitting protrusions are fitted in the axial direction, and the fitting protrusions are circumferentially locked to the fitting protrusions of the mating coupling metal body to restrict the movement in the axial direction. A locking collar portion that locks the metal fitting body in the axial direction, and at least an inner surface is cut out in a direction perpendicular to the axis of the coupling metal fitting body so that a side wall of the metal fitting fitting body is cut out to approximately the same diameter as the diameter of the metal fitting fitting body formed in the form of shape, it has a concave curved surface that matches the curvature of the inner peripheral surface of the fitting body, The swing valve substantially elliptical open shape, and pivotally supported at one end portion in a direction perpendicular to the longitudinal direction of the swing valve rotatably said swing valve to the fitting body as the pivot section, of the fitting body a first position in which perpendicular to the axis to close the interior of the fitting body, positioned parallel to the concave curved surface coincides with the inner peripheral surface of the fitting body and the axis of the fitting body An operating means capable of rotating the swing valve between a second position where the interior of the coupling metal body is opened, and an inner peripheral surface of the coupling metal body, wherein the swing valve is comprising a seal member for sealing between the outer peripheral surface of the inner peripheral surface and the swing valve of the fitting body in the first position, the when located at the first position, said operating means, said swing valve The second place A biasing spring that biases in a direction to rotate toward the first position, and a fitting protrusion and a fitting recess of the pair of coupling metal bodies, and And a sleeve for rotating the swing valve from the first position to the second position to open the swing valve when fitted to the fitting protrusion in the axial direction. This is a fitting with a valve.
[0008]
According to a second aspect of the present invention, in the coupling fitting according to the first aspect, the inner circumferential surface of the coupling fitting main body has the inner circumferential surface of the coupling fitting main body when the swing valve is positioned at the second position. An escape portion for storing the swing valve is provided so that the concave curved surfaces of the swing valve coincide with each other.
[0009]
According to a third aspect of the present invention, there is provided the coupling fitting according to the first or second aspect, wherein the swing valve has a side wall of the coupling fitting body perpendicular to an axis of the coupling fitting body. It is characterized in that it is formed by cutting out to approximately the same diameter as the diameter of.
[0010]
According to a fourth aspect of the present invention, there is provided a coupling fitting comprising the swing valve according to the first , second, or third aspect, wherein the sleeve is advanced and retracted in the axial direction of the coupling fitting main body on the inner surface of the coupling fitting main body. When the mating projection and the mating recess of the coupling bracket body are fitted in the mating recess and mating projection of the mating coupling body in the axial direction, An operation of rotating the swing valve from the first position to the second position is performed by hitting the sleeve and being pushed into the coupling metal body .
[0011]
According to a fifth aspect of the present invention, in the coupling fitting according to the first or fourth aspect, the sleeve is cylindrical in contact with an inner peripheral surface of the coupling fitting main body, and a rear end portion is the swing valve. According to the curved shape, the concave curved surface and the convex curved surface have a continuous wave shape.
A sixth aspect of the present invention is the coupling fitting provided with the swing valve according to any one of the first to fifth aspects, wherein the inner circumferential surface of the sleeve, the inner circumferential surface of the coupling fitting main body, and the second position are provided. The swing valve has a diameter that substantially coincides with the concave curved surface of the swing valve.
[0012]
According to the above configuration, when the pair of coupling fittings are detached, the swing valve is rotated in a direction perpendicular to the axis of the coupling fitting main body by the biasing means, the passage of the coupling fitting main body is closed by the swing valve, and the swing The outer peripheral surface of the valve is sealed by a sealing member to be in a watertight state.
[0013]
Further, when the pair of coupling fittings are coupled, the swing valve is pressed against the urging force by an operating means such as a sleeve, and the swing valve is in a state parallel to the axis of the coupling fitting main body and the passage of the cylinder body is opened. The At this time, the inner peripheral surface of the swing valve coincides with the inner peripheral surface of the coupling metal body, and the pressure loss of the fluid flowing through the passage can be reduced.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
1 to 4 show a first embodiment, in which a coupling fitting provided with a swing valve of the present invention is applied to a coupling fitting of a fire hose. The coupling metal fitting will be described with reference to FIG. 4. The coupling metal fitting is composed of a pair of coupling metal fitting bodies 1a and 1b having the same structure, and fire hose 2a and 2b are connected to the fitting metal fittings 1a and 1b, respectively. Has been.
[0016]
These coupling metal bodies 1a and 1b are each provided with a cylindrical body 3. The cylindrical body 3 has a substantially cylindrical shape, and a plurality of, for example, six fitting protrusions are formed at the front end of the cylindrical body 3. 8 protrudes integrally. These fitting protrusions 8 are arranged at equal intervals in the circumferential direction and protrude in the axial direction. Further, a space between these fitting protrusions 8 is formed as a fitting recess 9. When these fitting metal bodies 1a, 1b are abutted in the axial direction, one fitting metal body 1a The fitting protrusion 8 fits in the fitting recess 9 of the other coupling metal body 1b, and the fitting protrusion 8 of the other coupling metal body 1b fits in the fitting recess 9 of the one coupling metal body 1a. Mates and fits in a complementary fashion.
[0017]
In the first embodiment, the width of the fitting recess 9 is slightly wider than the width of the fitting protrusion 8. Accordingly, the fitting protrusions 8 are fitted in the fitting recesses 9 in the axial direction and are also rotatable by a predetermined amount in the circumferential direction.
[0018]
Further, a stepped hook-shaped locking hook 8a is formed on one side surface of the fitting protrusion 8, respectively, and these are mutually connected to the locking hook 8a of the mating fitting protrusion 8 and the circumferential direction. It is comprised so that it may engage with. Therefore, in a state in which these fitting projections 8 are fitted in the mating fitting recesses 9 in the axial direction, the coupling metal bodies 1a and 1b are rotated with respect to each other, and one of the fitting projections 8 is When the side surfaces are close to each other, the locking hooks 8a are engaged with each other to lock in the axial direction, and the coupling metal bodies 1a and 1b are coupled to each other.
[0019]
Further, the leading end corners of the other side surfaces of the fitting protrusions 8 are formed in an arc shape to form a guide portion 12, and when these are fitted, the guide portions 12 come into contact with each other. .
[0020]
Further, an urging mechanism 10 is provided on each of the other side surfaces of the engaging protrusions 8. These urging mechanisms 10 include an urging member, for example, a steel ball 15, which is slidably accommodated in a cylindrical case member 14, and a spring (not shown) which urges the steel ball 15 in the protruding direction. These urging mechanisms 10 are embedded in the other side surfaces of the fitting protrusions 8. Therefore, when these fitting projections 8 are fitted in the mating fitting recess 9, the steel balls 15 come into contact with each other and are pressed against each other, and the other side surface of these fitting projections 8. As a result, the one side surfaces of the fitting projections 8 are biased so as to be close to each other, and the locking collars 8a on these one side surfaces are engaged with each other as described above. It is energized to unite.
[0021]
As shown in FIGS. 1 to 3, an annular groove 3 a having a wave shape is provided on the inner peripheral surface of the front end portion of the cylinder body 3, following the shape of the rear end portion of a sleeve 18 described later. 3a has a substantially C-shaped cross section, and is fitted with a packing 17 that expands in the axial direction of the cylinder body 3 to exert a sealing effect when water pressure is applied. A cylindrical sleeve 18 is inserted into the inner peripheral surface of the front end portion of the cylinder body 3 from the packing 17 so as to be movable forward and backward in the axial direction. The sleeve 18 has a thick portion 18a at the front end and a thin portion 18b at the rear end, and a step portion 18c is formed on the outer peripheral surface at the boundary between the thick portion 18a and the thin portion 18b. Further, the rear end portion of the sleeve 18 is formed in a wave shape in which a convex portion and a concave portion are continuous following a curved shape of a swing valve 22 described later.
[0022]
On the inner peripheral surface of the cylindrical body 3, there are provided a shallow recess portion 19a into which the thick portion 18a and the thin portion 18b of the sleeve 18 are fitted, a deep recess portion 19b, and a step portion 19c facing the step portion 18c. The inner peripheral surface coincides with the inner peripheral surface of the tube body 3. When the sleeve 18 moves forward, the front end of the sleeve 18 is in a position coincident with the front end of the cylinder body 3. When the sleeve 18 moves backward, the step portion 18 c of the sleeve 18 abuts on the step portion 19 c of the cylinder body 3 to restrict the stroke of the sleeve 18. It is like that.
[0023]
A rectangular recessed portion 20 is provided on the outer peripheral wall of the cylinder body 3, and a circular opening 21 as a relief portion is provided on the bottom surface of the recessed portion 20. The opening 21 has a shape in which the side wall of the cylinder main body 3 is cut out in a direction perpendicular to the axis of the cylinder main body 3 so as to have the same diameter as the diameter of the cylinder main body 3.
[0024]
A swing valve 22 having the same shape as the opening 21 is provided in the opening 21 of the cylinder body 3. The swing valve 22 has a concave curved surface whose inner peripheral surface matches the curvature of the inner peripheral surface of the cylinder main body 3, and the developed shape is substantially elliptical. Further, a bracket 23 is fixed to the outer peripheral surface of the swing valve 22 in a direction orthogonal to the longitudinal direction.
[0025]
Further, the recessed portion 20 located on the front end side of the cylinder body 3 is provided with a hinge shaft 25 whose both ends are rotatably supported by the bearing 24. The hinge shaft 25 is bent at the intermediate portion so as to face the opening 21. This protrusion is fixed to the bracket 23 of the swing valve 22. Therefore, the swing valve 22 is rotatable about a hinge shaft 25 as a pivotal support, and is parallel to the position where the inside of the cylinder body 3 is closed perpendicular to the axis of the cylinder body 3 and the axis of the cylinder body 3. Then, the concave curved surface coincides with the inner peripheral surface of the tube main body 3 and rotates between the position where the inside of the tube main body 3 is opened (rotation angle 90 °).
[0026]
Further, the hinge shaft 25 is provided with an urging spring (not shown) that urges the swing valve 22 in a direction to close the inside of the cylinder body 3, and the recessed portion 20 is closed by a detachable lid 29. Has been.
[0027]
Further, when the swing valve 22 is in a position that is perpendicular to the axis of the cylinder body 3 and closes the inside of the cylinder body 3, the outer peripheral surface 22a of the swing valve 22 is pressed against the packing 17 and sealed in a watertight manner. It has become.
[0028]
In addition, the shape of the packing 17 is not limited to “the one having a substantially C-shaped cross section and attached to the cylinder body 3 side” as in the present embodiment. For example, “the same shape as the substantially elliptical shape that is the developed shape of the swing valve 22, and a rubber plate packing that is one size larger is sandwiched between the swing valve 22 and the bracket 23 and bonded to the swing valve 22 with an adhesive”. The packing is made to protrude slightly over the entire circumference of the swing valve 22. Since this packing is located on the side to which pressure is applied, the pressure is pressed against the gap between the inner wall surface of the cylinder body 3 and the swing valve 22 to ensure watertightness. Further, since the rubber plate packing is elastically deformed, it does not interfere with the opening / closing operation of the swing valve 22.
[0029]
Furthermore, a pin hole 26 is provided in a direction orthogonal to the axial direction of the cylinder main body 3 on the inner wall of the cylinder main body 3 located on the opposite side of the pivot portion of the swing valve 22, and the pin hole 26 protrudes by a spring 27. A stopper pin 28 is provided in the direction. The stopper pin 28 is configured to stop at a position where the swing valve 22 is at a position that is orthogonal to the axis of the cylinder body 3 and closes the inside of the cylinder body 3. Further, a slope 28 a facing the sleeve 18 is formed at the tip of the stopper pin 28, and slides on the slope 28 a as the sleeve 18 moves backward so that the stopper pin 28 is inserted while compressing the spring 27. ing.
[0030]
Next, the operation of the coupling fitting configured as described above will be described.
[0031]
When the coupling metal bodies 1a and 1b are detached, the swing valve 22 is rotated in a direction perpendicular to the axial direction of the cylinder body 3 with the hinge shaft 25 as a fulcrum by the urging force of the urging spring, as shown in FIGS. It is in contact with the stopper pin 28. The outer peripheral surface 22a of the swing valve 22 is pressed against the packing 17 and sealed in a water-tight manner, and the packing 17 is expanded by applying the water pressure inside the cylinder body 3 to the inside of the packing 17. Become.
[0032]
As shown in FIG. 1, when these coupling metal bodies 1a and 1b are coupled, these coupling metal bodies 1a and 1b are opposed substantially concentrically, and are abutted in the axial direction. 8 is fitted into the mating recess 9 on the other side. In this case, since all the fitting protrusions 8 have the same shape and six are arranged at equal intervals, these fitting protrusions 8 are fitted with any other fitting recess 9 on the other side. be able to. Therefore, in order to make the fitting projection 8 and the mating fitting recess 9 face each other, it is only necessary to relatively rotate the coupling metal bodies 1a and 1b by about 30 ° at the maximum, and to connect them. It is not necessary to twist the fire hoses 2a and 2b that are used excessively, and the operation is easy.
[0033]
And when these are fitted to an axial direction, the front-end | tip parts of one side surface of the fitting protrusion 8 contact | abut, and the clearance gap between the other side surfaces decreases. However, since the guide portion 12 is formed at the tip corner portion of the other side surface, the arcuate guide portions 12 come into contact with each other and guide each other smoothly. It is prevented that the tip of the mating protrusion 8 is caught.
[0034]
When the fitting protrusions 8 are fitted in the axial direction in this way, the steel balls 15 of the urging mechanism 10 provided on the other side face are pressed against each other, and one side face of the fitting protrusions 8 is pressed. Are energized so that they are close to each other. Then, when the locking hooks 8a formed on the one side face over the other end, the locking hooks 8a are engaged with each other in the circumferential direction by the biasing force of the biasing mechanism 10. In this state, the pair of coupling metal bodies 1a and 1b are coupled.
[0035]
When the coupling metal bodies 1a and 1b are coupled, the sleeves 18 in the coupling metal bodies 1a and 1b come into contact with each other at the front end, so that the sleeve 18 moves backward. As the sleeve 18 moves backward, the rear end of the sleeve 18 comes into contact with the inclined surface 28 a of the stopper pin 28 and pushes the stopper pin 28 against the biasing force of the spring 27. Further, the rear end of the sleeve 18 abuts against the swing valve 22, presses the swing valve 22 against the biasing force of the biasing spring, and rotates the hinge shaft 25 as a fulcrum.
[0036]
As shown in FIG. 1, when the stepped portion 18 c of the sleeve 18 reaches a position where it contacts the stepped portion 19 c, the swing valve 22 is in a state parallel to the axial center of the tubular body 3 and the passage of the tubular body 3 is opened. At the same time, the opening 21 of the cylinder body 3 is closed by the swing valve 22. Therefore, the inner peripheral surface of the swing valve 22 coincides with the inner peripheral surface of the cylinder main body 3, and there is no step on the inner peripheral surface of the cylinder main body 3, so that the pressure loss of the fluid flowing through the passage of the cylinder main body 3 can be reduced.
[0037]
Next, when the coupling metal bodies 1a and 1b in the coupled state are released, these coupling metal bodies 1a and 1b are gripped with both hands and twisted in opposite directions. Thereby, these coupling metal bodies 1a and 1b rotate against the urging force of the urging mechanism 10, and the engagement of the locking collar portion 8a in the locked state is released. And if these joint metal fittings main bodies 1a and 1b are pulled apart from each other in the axial direction, they are released from the joint.
[0038]
At the same time as the coupling of the coupling metal bodies 1a and 1b is released, the swing valve 22 is rotated about the hinge shaft 25 by the urging force of the urging spring, and the passage of the cylinder body 3 is moved by the swing valve 22 as described above. Block.
[0039]
In the first embodiment, since the pair of coupling metal bodies 1a and 1b have exactly the same shape and dimensions, the coupling metal bodies 1a and 1b such as both ends of the fire hose and the water supply port of the pump are provided. If attached, it can be arbitrarily combined regardless of whether the male or female is male, and the possibility that the male and female types are mistaken and cannot be combined can be eliminated. In addition, since only one type of the coupling metal bodies 1a and 1b having the same structure is manufactured, the manufacturing cost can be reduced.
[0040]
Further, in this embodiment, there is a gap or play in the circumferential direction in the fitting between the fitting protrusion 8 and the fitting recess 9, and a slight positional deviation is allowed during fitting, so that the operation is easy. In addition, since there is no possibility of non-fitting due to biting of foreign matters such as sand, the reliability is high.
[0041]
The present invention is not limited to the above embodiments. For example, the above embodiment has been described with respect to a coupling fitting that connects fire hoses, but the present invention can also be applied to a coupling fitting that connects a fire hose and a water supply port of a pump, and other fire fighting fittings. Of course.
[0042]
Furthermore, the present invention is not limited to a fire hose, and can of course be applied as a coupling fitting for hoses and pipes used for other purposes.
[0043]
【The invention's effect】
The coupling fitting of the present invention can be arbitrarily joined because there is no distinction between males and females, and the coupling work is easy. Therefore, it is possible to eliminate any possibility that the connection is impossible, and the operation is easy and the reliability is high. Furthermore, since it is comprised from a pair of coupling metal fitting main body of the same structure, it is sufficient to produce only one type of coupling metal fitting body, and the manufacturing cost can be reduced.
[0044]
Furthermore, the swing valve for opening and closing the passage of the cylinder main body of the present invention has a shape in which the side wall of the cylinder main body is cut out in a direction perpendicular to the axis of the cylinder main body so as to have the same diameter as the diameter of the cylinder main body. The developed shape having a concave curved surface that matches the curvature of the inner peripheral surface of the cylinder main body is a substantially elliptical shape. Therefore, in the valve open state, the inner peripheral surface of the swing valve coincides with the inner peripheral surface of the cylinder main body, and there is no step on the inner peripheral surface of the cylinder main body, so that the pressure loss of the fluid flowing through the passage can be reduced. There is.
[Brief description of the drawings]
1A and 1B show a coupling fitting having a swing valve according to a first embodiment of the present invention, in which FIG. 1A is a partially cutaway plan view when the swing valve is in an open state, and FIG. Side view.
FIG. 2 is an enlarged vertical side view showing the fitting including the swing valve according to the embodiment when the swing valve is in a closed state.
3A and 3B show a coupling fitting including a swing valve according to the embodiment, wherein FIG. 3A is a partially cutaway plan view when the swing valve is in a closed state, and FIG. 3B is a longitudinal side view of the same.
4A and 4B show the embodiment, in which FIG. 4A is a perspective view of a coupling fitting, and FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1a, 1b ... Coupling metal body 3 ... Cylinder body 8 ... Fitting protrusion 9 ... Fitting recessed part 17 ... Packing (seal member)
18 ... Sleeve (operating means)
21 ... Opening (escape)
22 ... Swing valve 25 ... Hinge shaft (Pivot)

Claims

A pair of cylindrical coupling metal fittings for coupling the hoses with each other or the hose, and other devices;
A plurality of fitting protrusions arranged in the circumferential direction of the coupling fitting main body and projecting in the axial direction, and fitting recesses formed therebetween,
The fitting protrusions and the fitting recesses of the pair of fittings are fitted into the fitting depressions and fittings of the mating fitting body in the axial direction. A locking collar portion that locks the fitting projection of the coupling metal body in the circumferential direction to restrict axial movement, and latches the pair of coupling metal bodies in the axial direction;
At least an inner surface is formed in a shape in which a side wall of the coupling metal body is cut out in a direction perpendicular to the axis of the coupling metal body so as to have substantially the same diameter as the diameter of the coupling metal body. have a concave curved surface that matches the curvature of the surface, the swing valve substantially elliptical deployment shape,
One end portion in a direction perpendicular to the longitudinal direction of the swing valve is pivotally supported to the swing valve rotatably on the fitting body as the pivot section, of the fitting body and orthogonal to the axis of the fitting body A first position for closing the interior and the concave curved surface positioned in parallel with the inner peripheral surface of the coupling metal body parallel to the axis of the coupling metal body open the interior of the coupling metal body. Operating means capable of rotating the swing valve between a second position and
Provided on the inner peripheral surface of the coupling fitting main body, and when the swing valve is located at the first position, the first bracket is located between the inner circumferential surface of the coupling fitting main body and the outer peripheral surface of the swing valve. A sealing member for sealing ;
Equipped with,
The operation means includes
A biasing spring that biases the swing valve in a direction to rotate from the second position toward the first position;
When the fitting protrusions and the fitting recesses of the pair of coupling metal bodies are fitted to the fitting depressions and the fitting protrusions of the mating coupling metal body in the axial direction, the swing valve is moved to the first position. A sleeve that pivots to the second position to open the swing valve;
A coupling fitting having a swing valve characterized by comprising:

The swing valve is stored on the inner peripheral surface of the coupling metal body so that the concave curved surface of the swing valve coincides with the inner circumferential surface of the coupling metal body when the swing valve is positioned at the second position. 2. A fitting with a swing valve according to claim 1, wherein a relief portion is provided.

The swing valve is formed by cutting a side wall of the coupling metal body in a direction perpendicular to the axis of the coupling metal body so as to have substantially the same diameter as the diameter of the coupling metal body. Or the coupling metal fitting provided with the swing valve of Claim 2 .

The sleeve is provided on the inner surface of the coupling metal body so as to be movable forward and backward in the axial direction of the coupling metal body, and the fitting protrusion and the fitting recess of the coupling metal body are connected to the fitting recess of the mating coupling body. abuts against the sleeve of the mating fitting body when the fitting axially fitting projection, by being pushed into the fitting body, a second position twice the swing valve from a first position The joint fitting provided with the swing valve according to claim 1 , wherein the moving operation is performed .

The sleeve has a cylindrical shape in contact with the inner peripheral surface of the coupling metal body, and the rear end has a corrugated shape in which a concave curved surface and a convex curved surface follow the curved shape of the swing valve. The coupling fitting provided with the swing valve of Claim 1 or Claim 4 characterized by the above-mentioned.

6. The diameter of the inner peripheral surface of the sleeve, the inner peripheral surface of the coupling metal body, and the concave curved surface of the swing valve when in the second position are substantially equal to each other. A coupling fitting comprising the swing valve according to any one of the above.