JP2004204900A

JP2004204900A - Flange coupling construction

Info

Publication number: JP2004204900A
Application number: JP2002372526A
Authority: JP
Inventors: Makoto Yoshino; 誠吉野
Original assignee: Denso Corp
Current assignee: Denso Corp
Priority date: 2002-12-24
Filing date: 2002-12-24
Publication date: 2004-07-22

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flange coupling structure capable of easily connecting two piping members in one-touch and improving sealing performance. <P>SOLUTION: A first flange coupling member 3 is mounted on a first piping member 1, and a second flange coupling member 4 is mounted on a second piping member 2. A first flange coupling member 3 includes a connecting male portion 32 forming an oval on an outside diameter, and an inserting hole 44 capable of inserting the connecting male portion 32 and a spot-faced hole 42 capable housing the connecting male portion 32 are formed on the second flange coupling member 4. A pair of interference portions forming a diameter smaller than the oval portion of the connecting male portion 32 are respectively formed at opposite positions with an arbitrary angle on the spot-faced hole 42. Upon turning the connecting male portion 32 at approximately 90° after inserting into the spot-faced hole 42, both flange coupling members 3 and 4 are joined so that the oval portion gets over the interference portion and the oval is connected with a wall portion around the spot-faced hole 42. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明はフランジ継手構造に関し、さらに、例えば冷凍サイクルの冷媒用配管部材を接続するのに好適なフランジ継手構造に関する。
【０００２】
【従来の技術】
一般に、冷凍サイクルの冷媒用配管部材を連結するフランジ継手や配管継手においては、雄側継手部を有する第１の配管部材と雌側継手部を有する第２の配管部材とを接続する際、コストアップにならないように構成することや、作業性を向上することや、あるいは継手部のがたつきをなくして水分や異物が浸入しないようにシール性を向上して構成することが課題として挙げられていた。例えば、従来のフランジ継手構造においては、図２３に示すようなフランジ継手構造（特許文献１）が知られている。
【０００３】
この特許文献１に示されているフランジ継手構造では、中空管１００とその開口部１０１に対して相対的に嵌合可能な中空管１０５とを備え、一方の中空管１００は、端部付近に偏平な多角形をした鍔部１０２を有し、他方の中空管１０５は、端部付近に両足部１０７・１０７を備えるフランジ部１０６を有して形成されている。フランジ部１０６の両足部１０７・１０７の先端面には、軸方向に向かって延設する係合部１０８・１０８が形成され、両足部１０７・１０７の軸心に対して対向する側部には一対の位置決め板１０９・１０９が形成されている。そして、一方の中空管１００を他方の中空管１０５に嵌合するとともに、一方の中空管１００に配置されている鍔部１０２を他方の中空管１０５の両足部１０７・１０７間に収納して一方の中空管１００を他方の中空管１０５に対して相対的に回転させて他方の中空管１０５の係合部１０８・１０８を一方の中空管１００の鍔部１０２に係合することによって、一方の中空管１００と他方の中空管１０５とを連結させている。この構成によって、簡単な構造で容易に２つの中空管１００・１０５を連結することができる。
【０００４】
【特許文献１】
特開２０００−３５６２９３公報（３〜４頁、図１）
【０００５】
【発明が解決しようとする課題】
しかし、従来の特許文献１に記載されている構成は、一方の中空管１００と他方中空管１０５とを接続する際に、図示しないシール部材を装着することによってシール性を高めているものの、お互いに圧接するように構成しているものではないことから、例えば、高圧の冷媒を配管部材内に流通させる場合には、高圧の冷媒は外部に漏れやすく、また外部からの水分や異物等も浸入しやすい。しかも、一方の配管部材１００の鍔部１０２が、他方の配管部材１０５の両足部１０７間に進入して鍔部１０２を回転させて位置決め板１０９・１０９に当接して位置決めするように構成されていることから、鍔部１０２が、位置決めされた位置でロックされているものではない。従って、例えば、車両のように連続的な振動が発生している状態では、一方の配管部材１００が逆回転しつつ他方の配管部材１０５から脱着する虞れも生じてしまう。
【０００６】
本発明は、上述の課題を解決するものであり、２配管部材をワンタッチで容易に接続作業を行なえるとともに接続した後のシール性を向上できるフランジ継手構造を提供することを目的とする。
【０００７】
【課題を解決するための手段】
本発明に係るフランジ継手構造では、上記の課題を解決するために、請求項１及び請求項３記載の発明では、雄側継手部を有する第１の配管部材に第１のフランジ継手部材を装着し、雌側継手部を有する第２の配管部材に第２のフランジ継手部材を装着して２配管部材を接続するものである。
【０００８】
つまり、第１の配管部材の膨出部外径より大きな長円外径部又は楕円長円外径部を一部に有する中空筒状部を備えた第１のフランジ継手部材が、第１の配管部材の一般部筒部に支持されて、第２の配管部材の第２のフランジ継手部のザグリ孔部に挿入される。第２のフランジ継手部材の挿入孔部は、第１のフランジ継手部材の中空筒状部と略同一の形状で形成され、ザグリ孔部は中空筒状部を収納可能に形成していることから、第１のフランジ継手部材の中空筒状部の長円外径部又は楕円長円外径部を、第２のフランジ継手部材のザグリ孔部に挿入して、回転することによって、第１のフランジ継手部材の中空筒状部の長円外径部又は楕円長円外径部が、第２のフランジ継手部材のおける挿入孔部の周りの部位に係合して中空筒状部が抜け止めされることとなる。
【０００９】
さらに、この第２のフランジ継手部材のザグリ孔部における任意角度の内径部は、回転される第１のフランジ継手部材の中空筒状部における長円部の外径より小径に形成されて、しかも乗り越え可能となっていることから、乗り越えた位置において、第１のフランジ継手部材と第２のフランジ継手部材とはロック可能に係合されることとなって、例え、連続的な振動が発生しても、それ自体で係合が解除されることはない。
【００１０】
また、請求項２及び４記載の発明では、雄側継手部を有する第１の配管部材に第１のフランジ継手部材を装着し、雌側継手部を有する第２の配管部材に第２のフランジ継手部材を装着して２配管部材を接続するものである。
【００１１】
つまり、第２の配管部材の膨出部外径より大きな長円外径部又は楕円長円外径部を一部に有する中空筒状部を備えた第２のフランジ継手部材が、第２の配管部材の一般部筒部に支持されて、第１の配管部材の第１のフランジ継手部材のザグリ孔部に挿入される。第１のフランジ継手部材の挿入孔部は第２のフランジ継手部材の中空筒状部と略同一の形状で形成され、ザグリ孔部が中空筒状部を収納可能に形成していることから、第２のフランジ継手部材の長円外径部又は楕円長円外径部を、第１のフランジ継手部材のザグリ孔部に挿入して回転することによって、第２のフランジ継手部材の中空筒状部の長円外径部又は楕円長円外径部が第１のフランジ継手部材における挿入孔部の周りの部位に係合して中空筒状部が抜け止めされることとなる。
【００１２】
さらに、この第１のフランジ継手部材のザグリ孔部における任意角度の内径部は、回転される第２のフランジ継手部材の中空筒状部における長円部の外径より小径に形成されて、乗り越え可能となっていることから、乗り越えた位置において、第１のフランジ継手部材と第２のフランジ継手部材とはロック可能に係合されることとなって、例え、連続的な振動が発生しても、それ自体で係合が解除されることはない。
【００１３】
請求項５記載の発明では、第２のフランジ継手部材のザグリ孔部の内周面に複数のピンを配置させ、第１のフランジ継手部材の中空筒状部の外周面にピンと係合可能な溝部を設けていることから、第１のフランジ継手部材の中空筒状部が第２のフランジ継手部材のザグリ孔部に挿入して回転すると、中空筒状部が任意の回転において、中空筒状部の溝部がザグリ孔部のピンに係合して、その位置で位置決め固定される。ピンと溝部との係合は複数箇所において行われることから、第１の配管部材と第２の配管部材とは振動による係合解除を起こしにくく、確実に接続されることとなる。
【００１４】
また請求項６記載の発明では、第１のフランジ継手部材のザグリ孔部の内周面に複数のピンを配置させ、第２のフランジ継手部材の中空筒状部の外周面にピンと係合可能な溝部を設けていることから、第２のフランジ継手部材の中空筒状部が第１のフランジ継手部材のザグリ孔部に挿入して回転すると、中空筒状部が任意の回転において、中空筒状部の溝部がザグリ孔部のピンに係合して、その位置で位置決め固定される。ピンと溝部との係合は複数箇所において行われることから、第１の配管部材と第２の配管部材とは振動による係合解除を起こしにくく、確実に接続されることとなる。
【００１５】
請求項７記載の発明では、中空筒状部ザグリ孔部内に挿入して、第１の配管部材と第２の配管部材とが一体的に結合すると、第１の配管部材のテーパ面と第２の配管部材のテーパ面とが当接することとなって、幅広い面積で接触できてシール性を向上することができる。従って、冷媒の外部への漏れを防止するとともに外部からの水分や異物の浸入を防止することができる。
【００１６】
請求項８記載の発明では、雌側継手部を有する第２の配管部材が、空調装置、例えば、エバポレータやコンデンサあるいはコンプレッサの冷媒の出入口に形成された継手部であっても、第１のフランジ継手部材を有する第１の配管部材との接続を行えることから、ワンタッチで確実な接続を行うことができ、しかもシール性を向上して冷媒の外部への漏れを防止するとともに外部からの水分や異物の浸入を防止することができる。
【００１７】
さらに、請求項９記載の発明では、第１のフランジ継手部材が第２のフランジ継手部材に挿入して係合する際に、第１のフランジ継手部材の先端面と第２のフランジ継手部材の先端面との間に弾性材料を介して当接可能に構成すれば、シール性をさらに向上するとともに振動を吸収することができ、さらに外部からの水分や異物を配管部材内に侵入させることがない。
【００１８】
また、請求項１０記載の発明では、第１の配管部材の一般部筒部が第１のフランジ継手部材の後方で屈曲するように形成されているものにおいては、第１のフランジ継手部材を第１の配管部材の後端部から挿入する際に、第１のフランジ継手部材に形成された貫通孔の逃がし部によって、第１のフランジ継手部材の貫通孔が第１の配管部材の一般部筒部との干渉を避けることができて、第１のフランジ継手部材を雄側継手部にスムーズに挿通することができる。
【００１９】
【発明の実施の形態】
以下、本発明の一実施形態を図面に基づいて説明する。
【００２０】
第１の実施形態による配管継手構造は、図１〜２に示すように、冷凍サイクルにおける冷媒用配管部材としての雄側継手部１２を有する第１の配管部材１と雌側継手部３２を有する第２の配管部材２とを接続する際に、それぞれフランジ継手部材３、４を装着し、各フランジ継手部材３、４を接合することによって第１の配管部材１を第２の配管部材２に接続するように構成される。
【００２１】
第１の配管部材１は、図１に示すように、樹脂製の材料あるいは金属製の材料からなるとともに冷媒を流通するために筒状に形成され、挿入側先端部が一般部筒部（以下、単に筒部ともいう。）１１より拡径された雄側継手部１２として形成されている。雄側継手部１２には、Ｏリング５が嵌入されるシール溝１３が形成されるとともに、シール溝１３の反先端部側に膨出部１４が形成され、膨出部１４の前部に先端側に向かって小径となるテーパ外面１５が形成され、膨出部１４の後方に配置される一般部筒部１１と膨拡部１４との段差面が、第１のフランジ継手部材３と係合する係合面１６として形成されている。
【００２２】
第２の配管部材２は、樹脂製の材料あるいは金属材料からなるとともに冷媒を流通するために筒状に形成され、挿入側先端部が一般部筒部（以下、単に筒部ともいう。）２１より拡径されかつ一般部筒部２１と一体成形により形成された雌側継手部２２として形成されている。雌側継手部２２には第１の配管部材１の雌側継手部１２を内嵌する挿入口２３と、第１の配管部材１のテーパ外面１５に当接するテーパ内面２４を有する膨拡部２５を備えている。さらに、膨拡部２５の先端にはフランジ部２６が円周方の全周にわたって形成されている。
【００２３】
第１の配管部材１に装着される第１のフランジ継手部材３は、円筒状に形成されて外周面の対向する部位に平面部３１ａ・３１ａを備える本体リング部３１と、本体リング部３１から軸方向に、溝部３３を挟んで突出して形成される係合雄部３２とを備えている。係合雄部３２は、図３に示すように、平面部３１ａの平面方向に沿って第１の配管部材１の膨出部１４より長円となる長円部３２ａと平面状に形成された外幅部３２ｂを有する長円筒状に形成されている。さらに、本体リング部３１と係合雄部３２の内部には、第１の配管部材１の筒部１１を貫通する貫通孔３４が形成されている。
【００２４】
なお、係合雄部３２に形成される長円部３２ａは、楕円状の外径部を形成する係合雄部３２の長円部３２ａであってもよい。
【００２５】
第２の配管部材２に装着される第２のフランジ継手部材４は、図４に示すように、円筒状に形成して膨拡部２５に嵌合する本体リング部４１と、本体リング部４１の内部に形成されるザグリ孔部４２と第２の配管部材２の膨拡部２５が貫通する貫通孔４３と、本体リング部４１の先端面で第１の配管部材１の係合雄部３２を挿入する挿入孔部４４とを備えている。
【００２６】
挿入孔部４４は、第１のフランジ継手部材３の係合雄部３２を挿入できる長円部４４ａと第１の配管部材１の膨出部１４より僅かに大きい内幅部４４ｂとを備えて、係合雄部３２と略同一の形状をなして形成され、ザグリ孔部４２は、第１の配管部材１の膨出部１４を収納するとともに係合雄部３２の長円部３２ａ収納する略円形の内径を成している。
【００２７】
なお、挿入孔部４４に形成される長円部４４ａは、楕円状の内径部を形成する挿入孔部４４の長円部４４ａであってもよい。
【００２８】
さらに、ザグリ孔部４２の任意の角度の対向する２位置において、第１のフランジ継手部材３における係合雄部３２の長円部３２ａより小径に形成された干渉部４２ａ・４２ａを有している。なお、干渉部４２ａは、２位置に限定するものではなく一対の干渉部４２ａを２組以上であってもよい。
【００２９】
つまり、各寸法を詳細に説明すれば、図３〜４に示すように、第１のフランジ継手部材３における係合雄部３２の長円部３２ａの外径ｘ１は第２のフランジ継手部材４の挿入孔部４４の長円部４４ａの内径ｘ２より小さく、またザグリ孔部４２の一般部内径より小さく、さらに、ザグリ孔部４２の干渉部４２ａの内径ｘｙより僅かに大きく形成されている。また、第１のフランジ継手部材３の係合雄部３２の外幅部３２ｂの幅寸法ｚ１は、第２フランジ継手部材４の挿入孔部４４における内幅部ｚ２より小さく形成されている。
【００３０】
これによって、第１のフランジ継手部材３の係合雄部３２は、第２フランジ継手部材４の挿入孔部４４に挿入してザグリ孔部４２に収納することができ、さらに係合雄部４２を回転すると、長円部３２ａが干渉部４２ａに乗り越えることによって、係合雄部３２がザグリ孔部４２内で逆方向には回転できずに固定されることとなって、第１のフランジ継手部材３と第２のフランジ継手部材４とが、その位置で位置決めされるとともにロックされる。これによって、第１の配管部材１と第２の配管部材２とは接続されることとなる。
【００３１】
次に、上記のように構成されたフランジ継手構造において、第１の配管部材１を第２の配管部材２に接続する手順について図５〜１０に基づいて説明する。
【００３２】
まず、図５に示すように、第１のフランジ継手部材３を第１の配管部材１の筒部１１に後端部から嵌め込んで雄部継手部１２に向かって移動する。第１のフランジ継手部材３は、係合雄部３２の先端面が第１の配管部材１に形成された係合部１６に当接する位置でその移動を停止する。
【００３３】
次に、図６に示すように、第１のフランジ継手部材３と同様に、第２のフランジ継手部材４を第２の配管部材２の筒部２１の後端部から嵌め込んで雌側継手部２２の膨拡部２５上に向かって移動する。そして、本体リング部４１のザグリ孔部４２側端面が、雌側継手部２２のフランジ部２６に当接した位置においてその移動を停止する。
【００３４】
続いて、図６に示すように、第２のフランジ継手部材４を装着した第２の配管部材２の雌側継手部２２に向かって、第１のフランジ継手部材３を装着した第１の配管部材１の雄側継手部１２を挿入する。
【００３５】
この際、第１のフランジ継手部材３は、図７に示すように、係合雄部３２は長円部３２ａが縦方向になるように位置され、第２のフランジ継手部材４も、図８に示すように、挿入孔部４４における長円部４４ａが縦方向になるように位置されている。なお、第１のフランジ継手部材３における本体リング部３１の平面部３１ａ・３１ａは横方向でお互いに対向する位置にある。
【００３６】
第１の配管部材１における雄側継手部１２を第２の配管部材２の雌側継手部２２の挿入口２３内に挿入すると、第１の配管部材１のテーパ外面１５が、第２の配管部材２のテーパ内面２４に当接した位置でその挿入を停止して、第１のフランジ継手部材３の係合雄部３２が、第２のフランジ継手部材４のザグリ孔部４２内に進入する。そして、図９に示すように、第１のフランジ継手部材３あるいは第２のフランジ継手部材４のいずれかを９０°回転する（図例においては第１のフランジ継手部材３を回転する。）と係合雄部３２の長円部３２ａと挿入孔部４４の長円部４４ａとはクロス状に配置されることとなる。
【００３７】
この状態においては、図１０に示すように、係合雄部３２の長円部３２ａは挿入孔部４４における内幅部４４ｂ方向に移動することとなって、ザグリ孔部４２と挿入部４４の内幅部４４ｂとの径寸法の差分（つまり、内幅部４４ｂの周りの壁部）で第１のフランジ継手部材３と第２のフランジ継手部材４とは係合することとなって、軸方向に抜け止めされる。
【００３８】
この回転の際、第１のフランジ継手部材３の係合雄部３２は、第２のフランジ継手部材４のザグリ孔部４２に形成された干渉部４２ａを乗り越えることから、逆転する方向には回転することなくその位置においてロックされた状態となる。
【００３９】
また、第１のフランジ継手部材３の係合雄部３２が第２のフランジ継手部材４のザグリ孔部４２に進入した位置では、第１の配管部材１と第２の配管部材２とは、第１の配管部材１のテーパ外面１５と第２の配管部材２のテーパ内面２４との広い面積で接触することとなる。
【００４０】
上記のように、第１の形態のフランジ継手構造によれば、第１のフランジ継手部材３が、長円部３２ａを有する中空状の係合雄部３２を備え、第２のフランジ継手部材４が、長円部４４ａを有する挿入孔部４４と係合雄部３２の長円部３２ａを収納可能な大きさのザグリ孔部４２とを備えていることから、第１のフランジ継手部材１の係合雄部３２が挿入孔部４４を通ってザグリ孔部４２に挿入して回転することによって、係合雄部３２の長円部３２ａが第２のフランジ継手部材４の挿入孔部４４の内幅部４４ｂ周りの壁部と係合することができる。
【００４１】
さらに、この第２のフランジ継手部材４のザグリ孔部４２における任意角度の内径部には、係合雄部３２の長円部３２ａの外径より小径に形成する干渉部４２ａを対向する位置に一対形成していることから、係合雄部３２が相対的に回転して係合雄部３２が干渉部４２ａを乗り越えた位置において、第１のフランジ継手部材と第２のフランジ継手部材とはロック可能に係合されることとなる。
【００４２】
従って、第１の配管部材１と第２の配管部材２とは、ワンタッチで接続できるとともに、接続した状態ではロックされていることから、例え振動が連続的に発生したとしても、それ自体ではロック解除することはできず、確実な接続構造を提供することができる。
【００４３】
しかも第１の配管部材１と第２の配管部材２とはお互いにテーパ面（１５・２４）とで接触することから、接触面積を広く取ることができてシール性を向上することができる。
【００４４】
なお、第１の形態において、雄側継手部１２を有する第１の配管部材１に挿入孔部４４とザグリ孔部４２とを有する第２のフランジ継手部材４を装着して、雌側継手部２２を有する第２の配管部材２に係合雄部３２を有する第１のフランジ継手部材３を装着しても、前述と同様な作用と効果を達成することができる。
【００４５】
次に、第２の配管部材を空調装置における冷媒配管の出入口部の継手部として形成する第２の形態について説明する。つまり、この第２の形態においては、第１の配管部材１を、例えば、エバポレータ、またはコンデンサあるいはコンプレッサ等の空調装置６の出入口に接続する場合、図１１に示すように、第１の配管部材１と第１のフランジ継手部３の構成は前述の形態と同様であり、第１の配管部材１の雄側継手部１２は、空調装置６における出入口部６０の挿入口６１内に挿入される。
【００４６】
空調装置６の出入口部６０には、第１の配管部材１の雄側継手部１２が挿入する前述の挿入口６１と、挿入口６１の挿入側に形成されて第１の配管部材１の膨出部１４前面に形成するテーパ外面１５に当接可能なテーパ内面６２と、出入口部６０の第１のフランジ継手部材３側端面に形成されて係合雄部３２を挿入するための挿入孔部６３と、挿入孔部６３の後部側に形成されるザグリ孔部６４と、を備えている。
【００４７】
挿入孔部６３には、係合雄部３２を挿入可能とするために長円部６３ａを有して長円孔形に形成され、ザグリ孔部６４は、係合雄部３２の長円部６３ａの外径より僅かに大きく形成されるとともに、任意の角度において対向する位置に、係合雄部３２の長円部６３ａの外径より僅かに小径に形成された干渉部６４ａが、図４と同様の位置に一対形成されている。
【００４８】
そして、第１の配管部材１の雄側継手部１２を、出入口部６０の挿入口６１に挿入して、第１の配管部材１のテーパ外面１５が、出入口部６０のテーパ内面６２に当接すると、第１の配管部材１の係合雄部３２が、出入口部６０のザグリ孔部６４内に進入する。そして、その位置で第１のフランジ継手部材３を９０°回転すると、係合雄部３２の長円部３２ａは、ザグリ孔部６４の干渉部６４ａを乗り越えて回転することとなり、前述の形態と同様、ロック可能とすることができる。
【００４９】
さらにこの形態では、第１のフランジ継手部材３と出入口部６０とのお互いに対向する端面において弾性材料で形成される円環状の緩衝部材６６を介在させている。これによって、空調装置６から伝達される振動を吸収することができるとともにシール性を向上できることから、外部からの水分や異物の浸入を防止することができる。
【００５０】
なお、この弾性材料の緩衝部材６６は、第１の形態においても、第１のフランジ継手部材３と第２のフランジ継手部材４との間に装着することができる。
【００５１】
従って、この形態においても、第１の配管部材１と空調装置６の出入口部６０とは、ワンタッチで接続できるとともに、接続した状態ではロックされていることから、例え振動が連続的に発生したとしても、それ自体ではロック解除することはできず、確実な接続構造として提供することができる。
【００５２】
しかも第１の配管部材１と空調装置６の出入口部６０とはお互いにテーパ面（１５・６２）どうしで接触することから、接触面積を広く取ることができてシール性を向上することができる。
【００５３】
次に、第１の形態における第１のフランジ継手部材３と第２のフランジ継手部材４を一部改良した第３の形態におけるフランジ継手構造について図１２〜１７に基づいて説明する。
【００５４】
この第３の形態においては、図１２〜１３に示すように、第１の配管部材１に装着される第１のフランジ継手部材７の係合雄部７２には、長円部７２ａに溝部７２ｂが対向するように一対形成されている。一方、第２の配管部材２に装着される第２のフランジ継手部材８には、ザグリ孔部８２の内周面上に、複数（図例では６本）の小径ピン部８３が、小径ピン部８３の長手方向を軸方向に向けて配置されている。小径ピン部８３の外径は、溝部７２ｂの内径とほぼ同径か僅かに小さく形成されている。
【００５５】
つまり、第１のフランジ継手部材７には、図１４〜１５に示すように、本体リング部７１と、本体リング部７１から突出する係合雄部７２が形成され、係合雄部７２には第１の配管部材１の膨出部１４より大きな外径部を有する長円部７２ａが形成されている。そして長円部７２ａの最大径となる部位に一対の溝部７２ｂが形成される。
【００５６】
一方、第２のフランジ継手部材８には、図１６〜１７に示すように、本体リング部８１内に第１のフランジ継手部材７の係合雄部７２より僅かに大径に形成されたザグリ孔部８２と、長円部８４ａを有して第１のフランジ継手部材７の係合雄部７２を挿入可能な挿入孔部８４とを形成している。ザグリ孔部８２には、内周面上に６本の小径ピン部８３が配置されている。６本の小径ピン部８３は、それぞれ、軸心に対して対向する一対の小径ピン部８３・８３が３組配置されて、係合雄部７２に形成された一対の溝部７２ｂ・７２ｂが、ザグリ孔部８２の３箇所の位置で一対の小径ピン部８３・８３に係合可能としている。
【００５７】
これによって、図１２に示すように、第１のフランジ継手部材７の係合雄部７２が、第２のフランジ継手部材８の挿入孔部８４を通ってザグリ孔部８２に進入し、所定角度回転することによって、係合雄部７２の長円部７２ａが小径ピン部８３を乗り越えると、係合雄部７２に形成された溝７２部７２ｂ・７２ｂが、いずれかの一対の小径ピン部８３・８３に係合して、その位置でロックされる。
【００５８】
従って、この形態においても、第１の配管部材１と第２の配管部材２とは、ワンタッチで接続できるとともに、接続した状態ではロックされていることから、例え振動が連続的に発生したとしても、それ自体ではロック解除することはできず、確実な接続構造を提供することができる。
【００５９】
次に第４の形態のフランジ継手構造について、図１８〜２１に基づいて説明する。この形態においては、第１の配管部材１に装着される第１のフランジ継手部材９は、第１の形態における第１のフランジ継手部材３と同様に形成され、第２の配管継手部材２に装着される第２のフランジ継手部材１０は、長円形に形成された本体リング部１１１と第２の配管部材２の雌側継手部２２に嵌合する円筒状部１１２とを有して形成されている。
【００６０】
本体リング部１１１は、長円状の外周面から全周にわたって同一幅の壁部１１１ａを介して長円状に形成された挿入孔部１１３を有している。挿入孔部１１３の長円部１１３ａは、図２１に示すように、第１のフランジ継手部材９の係合雄部９２における長円部９２ａより大径に形成することによって、係合雄部３２を第２のフランジ継手部材１０の挿入孔部１１３に容易に挿入することができる。
【００６１】
そして、本体リング部１１１の挿入孔部１１３における長円部１１３ａと直交する短尺の平面部には、図２０〜２１に示すように、開口窓１１１ｂが対向する面において一対形成されている。この開口窓１１１ｂは、第２のフランジ継手部材１０に挿入する第１のフランジ継手部材９の雄側継手部９２の回転位置とほぼ一致する位置に形成される。
【００６２】
なお、嵌合雄部９２の長円部９２ａの外径は、本体リング部１１１の短尺部の内径より大きく形成され、図２１に示すように、挿入孔部１１３内に容易に挿入した係合雄部９２ａが、９０°回転することによって、係合雄部９２の長円部９２ａが第２のフランジ継手部材１０の本体リング部１１１に形成された一対の開口窓１１３ｂ内に挿入できることから、第１のフランジ継手部材９はその位置でロック可能とすることができる。
【００６３】
従って、この形態においても、第１の配管部材１と第２の配管部材２とは、ワンタッチで接続できるとともに、接続した状態ではロックされていることから、例え振動が連続的に発生したとしても、それ自体ではロック解除することはできず、確実な接続構造を提供することができる。
【００６４】
また、図２２に示すように、第１の配管部材１Ａが雄側継手部１２の後方部で屈曲されて形成しているものについては、第１のフランジ継手部材３Ａの貫通孔３１において、雄側継手部１２と反対側の部位を貫通孔３１より大径となるように逃がし部３５を形成すれば、フランジ継手部材３Ａを第１の配管部材１Ａの後方から挿入する際に、挿入しやすくなる。
【００６５】
この貫通孔３１の後部に形成される逃がし部３５の形状としては、図２２に示すように、貫通部３１から後方に広がるテーパ面として形成するか、あるいは、図示するものではないが、貫通部３１より大径の孔を貫通部３１に対して段つき状に形成することができる。
【図面の簡単な説明】
【図１】本発明の一形態によるフランジ継手構造を示す一部断面図である。
【図２】図１におけるＡ矢視図である。
【図３】図１における第１のフランジ継手部材を示す側面図である。
【図４】図１における第２のフランジ継手部材を示す側面図である。
【図５】図１における第１の配管部材に第１のフランジ継手部材を装着する作用を示す一部断面図である。
【図６】第１の配管部材と第２の配管部材とを接続する作用を示す一部断面図である。
【図７】図６における第１のフランジ継手部材の位置関係を示すＢ矢視図である。
【図８】図６における第２のフランジ継手部材の位置関係を示すＣ矢視図である。
【図９】第１のフランジ継手部材を回転させた作用を示す簡略側面図である。
【図１０】第１の配管部材と第２の配管部材の接続状態を示す一部断面図である。
【図１１】第２の形態のフランジ継手構造を示す一部断面図である。
【図１２】第３の形態のフランジ継手構造を示す一部断面図である。
【図１３】図１２におけるＤ矢視図である。
【図１４】図１２における第１のフランジ継手部材を示す側面図である。
【図１５】同断面図である。
【図１６】図１２における第２のフランジ継手部材を示す断面図である。
【図１７】同側面図である。
【図１８】第４の形態のフランジ継手構造における第２のフランジ継手部材を示す側面断面図である。
【図１９】第４の形態におけるフランジ継手構造を示す一部断面図である。
【図２０】図１９におけるＥ矢視図である。
【図２１】図１９におけるXXI−XXI断面図である。
【図２２】第１の配管部材の別の形態を示す一部断面図である。
【図２３】従来のフランジ継手構造を示す分解斜視図である。
【符号の説明】
１第１の配管部材
２第２の配管部材
３第１のフランジ継手部材
４第２のフランジ継手部材
５Ｏリング
６空調装置
１１筒部（一般部筒部）
１２雄側継手部
１４膨出部
１５テーパ外面
１６係合面
２２雌側継手部
２４テーパ内面
３２係合雄部（中空筒状部）
３２ａ長円部
３４貫通孔
３５逃がし部
４２ザグリ孔部
４２ａ干渉部
４４挿入孔部
４４ａ長円部
６０出入口部
６６干渉部材
７２係合雄部
７２ａ長円部
７２ｂ溝部
８２ザグリ孔部
８３小径ピン部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a flange joint structure, and more particularly to a flange joint structure suitable for connecting, for example, a refrigerant piping member of a refrigeration cycle.
[0002]
[Prior art]
Generally, in a flange joint or a pipe joint for connecting a refrigerant pipe member of a refrigeration cycle, a cost is required when connecting a first pipe member having a male joint section and a second pipe member having a female joint section. Challenges include configuring so that it does not increase, improving workability, or improving the sealability so that moisture and foreign substances do not enter by eliminating rattling of the joint part. I was For example, in a conventional flange joint structure, a flange joint structure as shown in FIG. 23 (Patent Document 1) is known.
[0003]
The flange joint structure disclosed in Patent Literature 1 includes a hollow tube 100 and a hollow tube 105 that can be relatively fitted to an opening 101 thereof, and one of the hollow tubes 100 has an end. The hollow tube 105 has a flat polygonal flange portion 102 near the portion, and the other hollow tube 105 has a flange portion 106 having both feet 107 near the end. Engagement portions 108, 108 extending in the axial direction are formed on the distal end surfaces of the two legs 107, 107 of the flange portion 106. A pair of positioning plates 109 are formed. Then, one of the hollow tubes 100 is fitted to the other hollow tube 105, and the flange 102 disposed on the one hollow tube 100 is inserted between the two legs 107 of the other hollow tube 105. The hollow tube 100 is housed and one of the hollow tubes 100 is rotated relative to the other hollow tube 105 so that the engaging portions 108 of the other hollow tube 105 are The engagement connects one hollow tube 100 with the other hollow tube 105. With this configuration, the two hollow tubes 100 and 105 can be easily connected with a simple structure.
[0004]
[Patent Document 1]
JP-A-2000-356293 (pages 3 and 4, FIG. 1)
[0005]
[Problems to be solved by the invention]
However, in the configuration described in the conventional patent document 1, when one hollow tube 100 and the other hollow tube 105 are connected, a sealing member (not shown) is attached to improve the sealing performance. However, since they are not configured to be in pressure contact with each other, for example, when flowing a high-pressure refrigerant through a piping member, the high-pressure refrigerant easily leaks to the outside, and moisture or foreign matter from the outside. Is also easy to penetrate. In addition, the flange portion 102 of the one piping member 100 enters between the two legs 107 of the other piping member 105, rotates the flange portion 102, and comes into contact with the positioning plates 109 to perform positioning. Therefore, the flange 102 is not locked at the positioned position. Therefore, for example, in a state where continuous vibration is generated as in a vehicle, there is a possibility that one pipe member 100 may be detached from the other pipe member 105 while rotating in the reverse direction.
[0006]
An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide a flange joint structure that can easily perform a connection operation between two pipe members with one touch and can improve a sealing property after the connection.
[0007]
[Means for Solving the Problems]
In the flange joint structure according to the present invention, in order to solve the above-mentioned problems, in the inventions according to claims 1 and 3, the first flange joint member is attached to the first pipe member having the male joint portion. Then, a second flange joint member is attached to a second pipe member having a female joint, and the two pipe members are connected.
[0008]
That is, the first flange joint member provided with the hollow cylindrical portion having an elliptical outer diameter portion or an elliptical elliptical outer diameter portion that is larger than the bulging portion outer diameter of the first piping member is the first flange joint member. The second pipe member is supported by the general tubular portion of the pipe member, and is inserted into the counterbore hole of the second flange joint of the second pipe member. The insertion hole portion of the second flange joint member is formed in substantially the same shape as the hollow cylindrical portion of the first flange joint member, and the counterbore hole portion is formed so as to accommodate the hollow cylindrical portion. By inserting the elliptical outer diameter portion or the elliptical elliptical outer diameter portion of the hollow cylindrical portion of the first flange joint member into the counterbore hole portion of the second flange joint member and rotating, the first An elliptical outer diameter portion or an elliptical elliptical outer diameter portion of the hollow cylindrical portion of the flange joint member is engaged with a portion around the insertion hole of the second flange joint member to prevent the hollow cylindrical portion from coming off. Will be done.
[0009]
Further, the inner diameter portion at an arbitrary angle in the counterbore hole portion of the second flange joint member is formed to have a smaller diameter than the outer diameter of the oblong portion of the hollow cylindrical portion of the first flange joint member to be rotated, and Since it is possible to get over, the first flange joint member and the second flange joint member are engaged with each other in a lockable manner at the overcoming position, and for example, continuous vibration occurs. However, the engagement is not released by itself.
[0010]
According to the second and fourth aspects of the present invention, the first flange joint member is attached to the first pipe member having the male joint portion, and the second flange member is attached to the second pipe member having the female joint portion. A joint member is attached to connect the two piping members.
[0011]
That is, the second flange joint member provided with the hollow cylindrical portion having an elliptical outer diameter portion or an elliptical elliptical outer diameter portion that is larger than the bulging portion outer diameter of the second pipe member, The first pipe member is supported by the general tubular portion of the pipe member and inserted into the counterbore hole of the first flange joint member of the first pipe member. Since the insertion hole portion of the first flange joint member is formed in substantially the same shape as the hollow cylindrical portion of the second flange joint member, and the counterbore hole portion is formed so that the hollow cylindrical portion can be stored, Inserting the elliptical outer diameter portion or the elliptical elliptical outer diameter portion of the second flange joint member into the counterbore hole portion of the first flange joint member and rotating the hollow flange portion of the second flange joint member results in the hollow cylindrical shape of the second flange joint member. The elliptical outer diameter portion or the elliptical elliptical outer diameter portion engages with the portion around the insertion hole in the first flange joint member, so that the hollow cylindrical portion is prevented from coming off.
[0012]
Further, the inner diameter portion at an arbitrary angle in the counterbore hole portion of the first flange joint member is formed to have a smaller diameter than the outer diameter of the oblong portion of the hollow cylindrical portion of the second flange joint member to be rotated, and gets over. Since it is possible, the first flange joint member and the second flange joint member are engaged with each other in a lockable manner at the position where the vehicle has climbed over, and for example, continuous vibration occurs. However, the engagement is not released by itself.
[0013]
In the invention according to claim 5, a plurality of pins are arranged on the inner peripheral surface of the counterbore hole portion of the second flange joint member, and the pins can be engaged with the outer peripheral surface of the hollow cylindrical portion of the first flange joint member. Since the groove portion is provided, when the hollow cylindrical portion of the first flange joint member is inserted into the counterbore hole portion of the second flange joint member and rotated, the hollow cylindrical portion is formed into a hollow cylindrical shape at an arbitrary rotation. The groove of the portion engages the pin of the counterbore portion, and is positioned and fixed at that position. Since the engagement between the pin and the groove is performed at a plurality of locations, the first pipe member and the second pipe member are less likely to be disengaged due to vibration, and are reliably connected.
[0014]
In the invention according to claim 6, a plurality of pins are arranged on the inner peripheral surface of the counterbore hole of the first flange joint member, and the pins can be engaged with the outer peripheral surface of the hollow cylindrical portion of the second flange joint member. When the hollow cylindrical portion of the second flange joint member is inserted into the counterbore hole portion of the first flange joint member and rotated, the hollow cylindrical portion is rotated at an arbitrary rotation. The groove of the groove engages with the pin of the counterbore, and is positioned and fixed at that position. Since the engagement between the pin and the groove is performed at a plurality of locations, the first pipe member and the second pipe member are less likely to be disengaged due to vibration, and are reliably connected.
[0015]
According to the seventh aspect of the present invention, when the first pipe member and the second pipe member are integrally connected by being inserted into the hollow cylindrical portion counterbore hole, the tapered surface of the first pipe member and the second pipe member are connected. Abuts on the tapered surface of the pipe member, so that the contact can be made in a wide area and the sealing performance can be improved. Therefore, it is possible to prevent the refrigerant from leaking to the outside and to prevent moisture and foreign substances from entering from the outside.
[0016]
According to the invention described in claim 8, even if the second piping member having the female-side joint portion is a joint portion formed at an inlet / outlet of a refrigerant of an air conditioner, e.g. Since the connection with the first piping member having the joint member can be performed, a reliable connection can be performed with one touch, and the sealing performance is improved to prevent the refrigerant from leaking to the outside, and to prevent moisture from the outside from leaking. Foreign matter can be prevented from entering.
[0017]
Further, according to the ninth aspect of the present invention, when the first flange joint member is inserted into and engaged with the second flange joint member, the distal end face of the first flange joint member and the second flange joint member are connected to each other. If it is configured to be able to abut against the tip end surface via an elastic material, it is possible to further improve the sealing performance and absorb vibrations, and to allow moisture and foreign substances from the outside to enter the piping member. Absent.
[0018]
In the invention according to claim 10, when the general pipe portion of the first pipe member is formed to bend behind the first flange joint member, the first flange joint member is formed by the first flange member. When inserting from the rear end of the first piping member, the through hole of the first flange coupling member causes the through-hole of the first flange coupling member to escape from the general pipe of the first piping member by the relief portion of the through-hole formed in the first flange coupling member. The first flange joint member can be smoothly inserted into the male-side joint portion by avoiding interference with the male joint.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0020]
The pipe joint structure according to the first embodiment, as shown in FIGS. 1 and 2, includes a first pipe member 1 having a male joint 12 as a refrigerant pipe member in a refrigeration cycle and a female joint 32. When connecting to the second piping member 2, the first piping member 1 is connected to the second piping member 2 by attaching the flange joint members 3 and 4 and joining the flange joint members 3 and 4. Configured to connect.
[0021]
As shown in FIG. 1, the first piping member 1 is made of a resin material or a metal material and is formed in a tubular shape for flowing a refrigerant. ) Is formed as a male-side joint portion 12 whose diameter is enlarged from 11. A seal groove 13 into which the O-ring 5 is fitted is formed in the male side joint portion 12, and a bulging portion 14 is formed on the side opposite to the distal end of the seal groove 13. A tapered outer surface 15 having a smaller diameter toward the side is formed, and a step surface between the general cylindrical portion 11 and the expanded portion 14 disposed behind the expanded portion 14 is engaged with the first flange joint member 3. It is formed as an engaging surface 16.
[0022]
The second piping member 2 is made of a resin material or a metal material, and is formed in a tubular shape for flowing a refrigerant, and has an insertion-side distal end portion having a general tubular portion (hereinafter, also simply referred to as a tubular portion) 21. It is formed as a female-side joint portion 22 having a larger diameter and formed integrally with the general tubular portion 21. The female joint 22 has an insertion opening 23 into which the female joint 12 of the first piping member 1 is fitted, and a bulging portion 25 having a tapered inner surface 24 abutting against the tapered outer surface 15 of the first piping member 1. It has. Further, a flange portion 26 is formed at the tip of the expansion portion 25 over the entire circumference.
[0023]
The first flange joint member 3 attached to the first piping member 1 is formed of a main body ring portion 31 having a cylindrical shape and having flat portions 31a and 31a at opposing portions of an outer peripheral surface, and a main body ring portion 31. An engaging male portion 32 is formed in the axial direction so as to protrude across the groove 33. As shown in FIG. 3, the engaging male portion 32 is formed in a flat shape with the elliptical portion 32 a that is longer than the bulging portion 14 of the first piping member 1 along the plane direction of the flat portion 31 a. It is formed in a long cylindrical shape having an outer width portion 32b. Further, a through hole 34 that penetrates through the cylindrical portion 11 of the first piping member 1 is formed inside the main body ring portion 31 and the engaging male portion 32.
[0024]
The oblong portion 32a formed on the engaging male portion 32 may be an oblong portion 32a of the engaging male portion 32 forming an elliptical outer diameter portion.
[0025]
As shown in FIG. 4, the second flange joint member 4 attached to the second piping member 2 has a main body ring portion 41 formed in a cylindrical shape and fitted to the expansion portion 25, and a main body ring portion 41. And a through hole 43 through which the bulging portion 25 of the second piping member 2 penetrates, and a male engaging portion 32 of the first piping member 1 at the distal end surface of the main body ring portion 41. And an insertion hole portion 44 for inserting the same.
[0026]
The insertion hole portion 44 includes an oval portion 44a into which the male engaging portion 32 of the first flange joint member 3 can be inserted, and an inner width portion 44b slightly larger than the bulging portion 14 of the first piping member 1. The counterbore portion 42 is formed to have substantially the same shape as the engaging male portion 32, and the counterbore hole portion 42 accommodates the bulging portion 14 of the first piping member 1 and accommodates the oblong portion 32 a of the engaging male portion 32. It has a substantially circular inner diameter.
[0027]
The oval portion 44a formed in the insertion hole portion 44 may be an oval portion 44a of the insertion hole portion 44 forming an elliptical inner diameter portion.
[0028]
Further, at two opposing positions of the counterbore hole portion 42 at an arbitrary angle, there are provided interference portions 42a, 42a having a smaller diameter than the oblong portion 32a of the engaging male portion 32 of the first flange joint member 3. I have. The number of the interference portions 42a is not limited to two, and two or more pairs of the interference portions 42a may be provided.
[0029]
That is, if each dimension is described in detail, as shown in FIGS. 3 and 4, the outer diameter x1 of the elliptical portion 32 a of the engaging male portion 32 in the first flange joint member 3 is equal to the second flange joint member 4. Are formed smaller than the inner diameter x2 of the oval portion 44a of the insertion hole portion 44, smaller than the inner diameter of the general portion of the counterbore hole portion 42, and slightly larger than the inner diameter xy of the interference portion 42a of the counterbore hole portion 42. The width dimension z1 of the outer width portion 32b of the male engaging portion 32 of the first flange joint member 3 is formed smaller than the inner width portion z2 of the insertion hole portion 44 of the second flange joint member 4.
[0030]
As a result, the male engaging portion 32 of the first flange joint member 3 can be inserted into the insertion hole 44 of the second flange joint member 4 and housed in the counterbore hole portion 42. Is rotated, the oblong portion 32a rides over the interference portion 42a, so that the engaging male portion 32 cannot be rotated in the opposite direction in the counterbore hole portion 42 and is fixed. The member 3 and the second flange joint member 4 are positioned and locked at that position. Thereby, the first piping member 1 and the second piping member 2 are connected.
[0031]
Next, a procedure for connecting the first piping member 1 to the second piping member 2 in the flange joint structure configured as described above will be described with reference to FIGS.
[0032]
First, as shown in FIG. 5, the first flange joint member 3 is fitted into the cylindrical portion 11 of the first piping member 1 from the rear end and moves toward the male joint portion 12. The movement of the first flange joint member 3 is stopped at a position where the distal end surface of the engaging male portion 32 comes into contact with the engaging portion 16 formed on the first piping member 1.
[0033]
Next, as shown in FIG. 6, similarly to the first flange joint member 3, the second flange joint member 4 is fitted from the rear end portion of the cylindrical portion 21 of the second pipe member 2 to form the female joint. It moves toward the expansion part 25 of the part 22. Then, the movement is stopped at a position where the end face of the body ring portion 41 on the counterbore hole portion 42 abuts against the flange portion 26 of the female joint portion 22.
[0034]
Subsequently, as shown in FIG. 6, the first pipe to which the first flange joint member 3 is attached is directed toward the female joint portion 22 of the second pipe member 2 to which the second flange joint member 4 is attached. The male joint 12 of the member 1 is inserted.
[0035]
At this time, as shown in FIG. 7, the first flange joint member 3 is positioned such that the engaging male part 32 has the elliptical part 32a in the vertical direction, and the second flange joint member 4 also has the shape shown in FIG. As shown in the figure, the oval portion 44a of the insertion hole portion 44 is located in the vertical direction. The flat portions 31a of the main ring portion 31 in the first flange joint member 3 are located at positions facing each other in the lateral direction.
[0036]
When the male joint portion 12 of the first piping member 1 is inserted into the insertion port 23 of the female joint portion 22 of the second piping member 2, the tapered outer surface 15 of the first piping member 1 The insertion is stopped at a position where it abuts on the tapered inner surface 24 of the member 2, and the engaging male portion 32 of the first flange joint member 3 enters the counterbore hole portion 42 of the second flange joint member 4. . Then, as shown in FIG. 9, when either the first flange joint member 3 or the second flange joint member 4 is rotated by 90 ° (in the illustrated example, the first flange joint member 3 is rotated). The oblong portion 32a of the engaging male portion 32 and the oblong portion 44a of the insertion hole 44 are arranged in a cross shape.
[0037]
In this state, as shown in FIG. 10, the oval portion 32 a of the engaging male portion 32 moves in the direction of the inner width portion 44 b of the insertion hole portion 44, and the counterbore hole portion 42 and the insertion portion 44 The first flange joint member 3 and the second flange joint member 4 are engaged with each other at the difference in the diameter dimension from the inner width portion 44b (that is, the wall around the inner width portion 44b), and the shaft is formed. It is locked in the direction.
[0038]
During this rotation, the engaging male portion 32 of the first flange joint member 3 gets over the interference portion 42a formed in the counterbore hole portion 42 of the second flange joint member 4, so that it rotates in the reverse direction. Without being locked at that position.
[0039]
Further, at the position where the engaging male portion 32 of the first flange joint member 3 has entered the counterbore hole portion 42 of the second flange joint member 4, the first piping member 1 and the second piping member 2 The tapered outer surface 15 of the first piping member 1 and the tapered inner surface 24 of the second piping member 2 come into contact with each other over a wide area.
[0040]
As described above, according to the flange joint structure of the first embodiment, the first flange joint member 3 includes the hollow engagement male portion 32 having the oval portion 32a, and the second flange joint member 4 Is provided with an insertion hole 44 having an oblong portion 44a and a counterbore 42 having a size capable of accommodating the oblong portion 32a of the engaging male portion 32. When the engaging male portion 32 is inserted into the counterbore hole portion 42 through the insertion hole portion 44 and rotated, the oblong portion 32a of the engaging male portion 32 is inserted into the insertion hole portion 44 of the second flange joint member 4. It can engage with a wall around the inner width portion 44b.
[0041]
Further, an interference portion 42a formed to have a smaller diameter than the outer diameter of the oblong portion 32a of the engaging male portion 32 is located at a position facing the inner diameter portion of the counterbore hole portion 42 of the second flange joint member 4 at an arbitrary angle. Since the pair is formed, at the position where the engaging male part 32 relatively rotates and the engaging male part 32 gets over the interference part 42a, the first flange joint member and the second flange joint member It will be engaged lockably.
[0042]
Therefore, the first piping member 1 and the second piping member 2 can be connected with one touch, and are locked in the connected state. Therefore, even if the vibration is continuously generated, the first piping member 1 and the second piping member 2 are locked by themselves. It cannot be released, and a reliable connection structure can be provided.
[0043]
Moreover, since the first piping member 1 and the second piping member 2 are in contact with each other on the tapered surfaces (15 and 24), a large contact area can be obtained, and the sealing performance can be improved.
[0044]
In the first embodiment, the first pipe member 1 having the male joint portion 12 is fitted with the second flange joint member 4 having the insertion hole portion 44 and the counterbore hole portion 42, and the female joint portion is provided. Even when the first flange joint member 3 having the engaging male portion 32 is attached to the second piping member 2 having the same 22, the same operation and effect as described above can be achieved.
[0045]
Next, a second embodiment in which the second pipe member is formed as a joint at the entrance and exit of a refrigerant pipe in an air conditioner will be described. That is, in the second embodiment, when the first piping member 1 is connected to an inlet / outlet of an air conditioner 6 such as an evaporator, a condenser, or a compressor, as shown in FIG. The configurations of the first and first flange joints 3 are the same as those in the above-described embodiment, and the male joint 12 of the first piping member 1 is inserted into the insertion opening 61 of the entrance 60 of the air conditioner 6. .
[0046]
At the entrance 60 of the air conditioner 6, the above-mentioned insertion port 61 into which the male joint 12 of the first pipe member 1 is inserted, and the expansion of the first pipe member 1 formed on the insertion side of the insertion port 61. A tapered inner surface 62 that can be brought into contact with the tapered outer surface 15 formed on the front surface of the outlet portion 14, and an insertion hole portion formed on the end surface of the inlet / outlet portion 60 on the first flange joint member 3 side for inserting the engaging male portion 32. 63 and a counterbore hole 64 formed on the rear side of the insertion hole 63.
[0047]
The insertion hole portion 63 is formed in an oval shape with an oval portion 63a so that the engaging male portion 32 can be inserted. The counterbore hole portion 64 is an oval portion of the engaging male portion 32. The interference portion 64a, which is formed slightly larger than the outer diameter of the elliptical portion 63a and is slightly smaller than the outer diameter of the oval portion 63a of the engaging male portion 32 at a position facing at an arbitrary angle, is shown in FIG. A pair is formed at the same position as.
[0048]
Then, the male-side joint portion 12 of the first piping member 1 is inserted into the insertion port 61 of the entrance / exit portion 60 so that the tapered outer surface 15 of the first piping member 1 abuts against the tapered inner surface 62 of the entrance / exit portion 60. Then, the engaging male portion 32 of the first piping member 1 enters the counterbore hole 64 of the entrance 60. When the first flange joint member 3 is rotated by 90 ° at that position, the oblong portion 32a of the engaging male portion 32 rotates over the interference portion 64a of the counterbore hole 64 and rotates. Similarly, it can be lockable.
[0049]
Further, in this embodiment, an annular cushioning member 66 made of an elastic material is interposed at the end faces of the first flange joint member 3 and the entrance / exit portion 60 facing each other. Thereby, the vibration transmitted from the air conditioner 6 can be absorbed and the sealing property can be improved, so that intrusion of moisture or foreign matter from the outside can be prevented.
[0050]
Note that the cushioning member 66 made of the elastic material can be mounted between the first flange joint member 3 and the second flange joint member 4 also in the first embodiment.
[0051]
Therefore, also in this embodiment, since the first piping member 1 and the entrance / exit portion 60 of the air conditioner 6 can be connected with one touch and are locked in the connected state, it is assumed that the vibration is continuously generated. Can not be unlocked by itself, and can be provided as a reliable connection structure.
[0052]
Moreover, since the first piping member 1 and the entrance / exit portion 60 of the air conditioner 6 are in contact with each other via the tapered surfaces (15 and 62), a large contact area can be obtained, and the sealing performance can be improved. .
[0053]
Next, a flange joint structure according to a third embodiment in which the first flange joint member 3 and the second flange joint member 4 in the first embodiment are partially improved will be described with reference to FIGS.
[0054]
In the third embodiment, as shown in FIGS. 12 and 13, the male engaging portion 72 of the first flange joint member 7 attached to the first piping member 1 has a groove portion 72 b in an oval portion 72 a. Are formed so as to face each other. On the other hand, the second flange joint member 8 attached to the second pipe member 2 has a plurality of (six in the illustrated example) small-diameter pin portions 83 on the inner peripheral surface of the counterbore hole portion 82. The portion 83 is disposed with the longitudinal direction thereof oriented in the axial direction. The outer diameter of the small-diameter pin portion 83 is substantially the same as or slightly smaller than the inner diameter of the groove 72b.
[0055]
That is, as shown in FIGS. 14 and 15, the first flange joint member 7 is formed with a main body ring portion 71 and an engaging male portion 72 protruding from the main body ring portion 71. An oval portion 72a having an outer diameter portion larger than the bulging portion 14 of the first piping member 1 is formed. Then, a pair of groove portions 72b is formed at a portion where the elliptical portion 72a has the maximum diameter.
[0056]
On the other hand, as shown in FIGS. 16 and 17, the second flange joint member 8 has a counterbore formed in the main body ring portion 81 to have a slightly larger diameter than the engaging male portion 72 of the first flange joint member 7. A hole 82 and an insertion hole 84 having an oval portion 84a and into which the male engaging portion 72 of the first flange joint member 7 can be inserted are formed. In the counterbore hole portion 82, six small diameter pin portions 83 are arranged on the inner peripheral surface. Each of the six small-diameter pin portions 83 includes three pairs of small-diameter pin portions 83, 83 opposed to the axis, and a pair of groove portions 72b, 72b formed in the engaging male portion 72. The pair of small-diameter pin portions 83 can be engaged with the counterbore hole portion 82 at three positions.
[0057]
Thereby, as shown in FIG. 12, the engaging male portion 72 of the first flange joint member 7 enters the counterbore hole portion 82 through the insertion hole portion 84 of the second flange joint member 8, and has a predetermined angle. When the elliptical portion 72a of the engaging male portion 72 gets over the small-diameter pin portion 83 by rotating, the grooves 72b 72b formed in the engaging male portion 72 are moved to one of the pair of small-diameter pin portions 83. Engage with 83 and lock in place.
[0058]
Therefore, also in this embodiment, the first piping member 1 and the second piping member 2 can be connected with one touch, and are locked in the connected state, so that even if vibration is continuously generated. The lock itself cannot be released, and a reliable connection structure can be provided.
[0059]
Next, a flange joint structure according to a fourth embodiment will be described with reference to FIGS. In this embodiment, the first flange joint member 9 attached to the first piping member 1 is formed in the same manner as the first flange joint member 3 in the first embodiment, and is formed in the second piping joint member 2. The second flange joint member 10 to be mounted is formed to have a main body ring portion 111 formed in an oval shape and a cylindrical portion 112 fitted to the female joint portion 22 of the second piping member 2. ing.
[0060]
The main body ring portion 111 has an insertion hole portion 113 formed in an oval shape through a wall portion 111a having the same width over the entire circumference from the oval outer peripheral surface. As shown in FIG. 21, the elliptical portion 113a of the insertion hole portion 113 is formed to have a larger diameter than the elliptical portion 92a of the male engaging portion 92 of the first flange joint member 9 so that the male engaging portion 32 is formed. Can be easily inserted into the insertion hole 113 of the second flange joint member 10.
[0061]
As shown in FIGS. 20 to 21, a pair of opening windows 111 b are formed on a short flat surface of the insertion hole 113 of the main body ring 111 perpendicular to the ellipse 113 a, as shown in FIGS. The opening window 111b is formed at a position substantially coincident with the rotational position of the male joint portion 92 of the first flange joint member 9 inserted into the second flange joint member 10.
[0062]
The outer diameter of the oblong portion 92a of the fitting male portion 92 is formed to be larger than the inner diameter of the short portion of the main body ring portion 111, and as shown in FIG. By rotating the male portion 92a by 90 °, the oval portion 92a of the engaging male portion 92 can be inserted into a pair of opening windows 113b formed in the main body ring portion 111 of the second flange joint member 10, The first flange joint member 9 can be lockable in that position.
[0063]
Therefore, also in this embodiment, the first piping member 1 and the second piping member 2 can be connected with one touch, and are locked in the connected state, so that even if vibration is continuously generated. The lock itself cannot be released, and a reliable connection structure can be provided.
[0064]
Further, as shown in FIG. 22, when the first pipe member 1A is formed by bending at the rear portion of the male side joint portion 12, the male member is formed in the through hole 31 of the first flange joint member 3A. If the relief portion 35 is formed so that the portion opposite to the side joint portion 12 has a diameter larger than that of the through hole 31, the flange joint member 3A can be easily inserted when the flange joint member 3A is inserted from behind the first piping member 1A. Become.
[0065]
As shown in FIG. 22, the shape of the relief portion 35 formed at the rear portion of the through hole 31 may be formed as a tapered surface extending rearward from the through portion 31 or, though not shown, the through portion may be formed. A hole having a diameter larger than that of the through-hole 31 can be formed stepwise with respect to the through portion 31.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view illustrating a flange joint structure according to one embodiment of the present invention.
FIG. 2 is a view taken in the direction of arrow A in FIG.
FIG. 3 is a side view showing a first flange joint member in FIG. 1;
FIG. 4 is a side view showing a second flange joint member in FIG. 1;
5 is a partial cross-sectional view showing an operation of attaching a first flange joint member to a first piping member in FIG.
FIG. 6 is a partial cross-sectional view showing an operation of connecting a first piping member and a second piping member.
7 is a view as viewed in the direction of the arrow B, showing a positional relationship of the first flange joint member in FIG.
FIG. 8 is a view as viewed in the direction of arrow C, showing a positional relationship of a second flange joint member in FIG. 6;
FIG. 9 is a simplified side view showing the operation of rotating the first flange joint member.
FIG. 10 is a partial cross-sectional view showing a connection state between a first piping member and a second piping member.
FIG. 11 is a partial sectional view showing a flange joint structure according to a second embodiment.
FIG. 12 is a partial sectional view showing a flange joint structure according to a third embodiment.
FIG. 13 is a view taken in the direction of arrow D in FIG.
FIG. 14 is a side view showing the first flange joint member in FIG.
FIG. 15 is a sectional view of the same.
FIG. 16 is a sectional view showing a second flange joint member in FIG. 12;
FIG. 17 is a side view of the same.
FIG. 18 is a side sectional view showing a second flange joint member in the flange joint structure according to the fourth embodiment.
FIG. 19 is a partial sectional view showing a flange joint structure according to a fourth embodiment.
20 is a view as viewed from the direction of the arrow E in FIG. 19;
21 is a sectional view taken along the line XXI-XXI in FIG.
FIG. 22 is a partial cross-sectional view showing another form of the first piping member.
FIG. 23 is an exploded perspective view showing a conventional flange joint structure.
[Explanation of symbols]
1 First piping member
2 Second piping member
3 First flange joint member
4. Second flange joint member
5 O-ring
6 air conditioner
11 Tube part (general part tube part)
12 Male side joint
14 bulge
15 Tapered outer surface
16 Engagement surface
22 Female joint
24 tapered inner surface
32 Engaging male part (hollow tubular part)
32a oval part
34 Through hole
35 escape part
42 Counterbore hole
42a Interference part
44 insertion hole
44a Oval part
60 Doorway
66 Interference member
72 Engaging male part
72a Oval part
72b Groove
82 Counterbore hole
83 small diameter pin

Claims

A first piping member forming a bulging portion in the male joint portion and a second piping member forming a bulging portion in the female joint portion, and a first pipe member mounted on the first piping member. A flange joint member configured by connecting a second flange joint member to be attached to the second pipe member,
The first flange joint member has a through hole that penetrates a general tubular portion of the first piping member, and has an elliptical outer diameter portion partially having a longer side larger than the outer diameter of the bulging portion. Or a hollow cylindrical portion forming an elliptical elliptical outer diameter portion is formed to protrude,
The second flange joint member has a through-hole penetrating the expanded portion of the second piping member, and is substantially the same as the counterbore hole portion that can accommodate the hollow cylindrical portion and the hollow cylindrical portion. And formed with an insertion hole having a shape,
The first flange joint member and the second flange joint member are formed to be rotatable after the hollow cylindrical portion of the first flange joint member is inserted into the counterbore hole of the second flange joint member. A flange joint structure characterized in that:

A first piping member forming a bulging portion in the male joint portion and a second piping member forming a bulging portion in the female joint portion, and a first pipe member mounted on the first piping member. A flange joint member configured by connecting a second flange joint member to be attached to the second pipe member,
The second flange joint member has a through-hole penetrating the bulging portion of the second piping member, and has an elliptical outer diameter portion having a longer side than the outer diameter of the bulging portion in a part thereof or A hollow cylindrical portion forming an outer diameter of the ellipse is formed to project,
The first flange joint member has a through hole that penetrates a bulging portion of the first piping member, and has a counterbore hole portion that can accommodate the hollow cylindrical portion and substantially the same as the hollow cylindrical portion. And formed with an insertion hole having a shape,
The first flange joint member and the second flange joint member are formed to be rotatable after the hollow cylindrical portion of the second flange joint member is inserted into the counterbore hole of the first flange joint member. A flange joint structure characterized in that:

The inside diameter of the counterbore portion of the second flange joint member at an arbitrary angle is made larger than the outside diameter of the oval portion of the hollow cylindrical portion or the outside diameter of the elliptical oval portion of the first flange joint member. The small-diameter portion, wherein the elliptical outer diameter portion or the elliptical elliptical outer diameter portion has an elliptical outer diameter that is rotatable over the small diameter portion of the counterbore hole portion. Flange joint structure.

The inside diameter of the counterbore hole of the first flange joint member at an arbitrary angle is made larger than the outside diameter of the oval portion of the hollow cylindrical portion or the outside diameter of the elliptical oval portion of the second flange joint member. The small-diameter portion, wherein the elliptical outer diameter portion or the elliptical elliptical outer diameter portion has an elliptical outer diameter that is rotatable over the small diameter portion of the counterbore hole portion. Flange joint structure.

A plurality of pins are arranged along the axial direction on the inner peripheral surface of the counterbore hole portion of the second flange joint member, and the outer periphery of the elliptical outer diameter portion or the elliptical elliptical outer diameter portion of the first flange joint member Forming a groove on the surface that can be engaged with the pin, and after rotating either the first flange joint member or the second flange joint member, the groove engages with the pin. The flange joint structure according to claim 1 or 3, wherein:

A plurality of pins are arranged along the axial direction on the inner peripheral surface of the counterbore hole portion of the first flange joint member, and the outer periphery of the elliptical outer diameter portion or the elliptical elliptical outer diameter portion of the second flange joint member Forming a groove on the surface that can be engaged with the pin, and after rotating either the first flange joint member or the second flange joint member, the groove engages with the pin. The flange joint structure according to claim 2 or 4, wherein:

The said 1st piping member and the said 2nd piping member or the said 2nd flange joint member are formed so that abutment mutually is possible at a taper surface. The flange joint structure according to 4, 5, or 6.

The flange joint structure according to claim 1, 2, 3, 4, 5, 6, or 7, wherein the second flange joint member is a part of an air conditioner.

The flange joint structure according to claim 8, wherein the distal end surface of the first flange joint member and the distal end surface of the second flange joint member are in contact with each other via an elastic material.

The relief part is formed in the back part of the through-hole in the said 1st flange joint member with respect to the general cylindrical part of the said 1st piping member. The flange joint structure according to 5, 6, 7, 8 or 9.