JP4231676B2

JP4231676B2 - Fitting

Info

Publication number: JP4231676B2
Application number: JP2002301335A
Authority: JP
Inventors: 善行岩原; 美里森
Original assignee: ONDA MFG.CO.,LTD.
Current assignee: ONDA MFG.CO.,LTD.
Priority date: 2002-10-16
Filing date: 2002-10-16
Publication date: 2009-03-04
Anticipated expiration: 2022-10-16
Also published as: JP2004138102A

Description

【０００１】
【発明の属する技術分野】
本発明は、水道配管、温水配管、床暖房、ロードヒーティング等に使用されるパイプ用の継手に関するものである。
【０００２】
【従来の技術】
従来より、例えば水道配管に、架橋ポリエチレン又はポリブテン製のパイプを接続するために継手が使用されている。この種の継手としては、以下に示すものが知られている（例えば、特許文献１参照）。すなわち、雌側継手に雄側継手の一端を内挿し、２つの継手を連結することにより構成されているタイプのものである。前記雌側継手は中心に挿入孔が貫設されるとともに、その基端部外周面にはフランジが突設されている。また、雄側継手の中間部外周面にはフランジが突設され、該フランジよりも先端側には雌側継手の挿入孔に挿入される突出部が設けられている。その突出部の先端部外周面には先端縁から雄側継手の軸線方向内方に向かうに従い拡径する面取り部が周設されている。また、突出部の中央部には収容溝が周設され、シール部材としてのシールリングが嵌着されている。
【０００３】
雌側継手と雄側継手とを接続するには、まず雄側継手の突出部を雌側継手の挿入孔に挿入する。このとき、雄側継手の面取り部が挿入案内の役割をする。そして、雄側継手の突出部が雌側継手の挿入孔に完全に挿入され、各継手に設けられたフランジが突き合わされた後にこの突き合わせ部分に連結部材を装着する。
【０００４】
この結果、連結部材によって雌側継手と雄側継手とが接続され、前記シールリングによって雌側継手の基端部内周面と雄側継手の突出部外周面との間がシールされる。
【０００５】
【特許文献１】
特開２０００―６５２６０号公報（第３〜４頁、図１）
【０００６】
【発明が解決しようとする課題】
ところが、壁裏や床下等の狭い空間においては、雄側継手を雌側継手の軸線方向に対して斜め方向から接続する場合がある。この場合、雄側継手の突出部に設けられた収容溝に嵌着されたシールリングが雌側継手の挿入孔側端縁と接触し、その状態で無理な力を加えて雄側継手の突出部を雌側継手の挿入孔に挿入するとシールリングが収容溝から押し出されるおそれがあるという問題があった。
【０００７】
本発明は、上記のような従来技術に存在する問題点に着目してなされたものである。その目的とするところは、シールリングの抜け出しを防止することができる継手を提供することにある。
【０００８】
【課題を解決するための手段】
上記の目的を達成するために、請求項１に記載の発明の継手は、筒状をなし、その一端にはフランジが周設され、内部には断面円形状の挿入孔が貫通形成され、挿入孔の内周面のフランジ側端縁には面取り部が周設されている雌側継手と、筒状をなし、その一端には前記挿入孔に挿入可能な円筒状の突出部を有し、突出部に周設された収容溝にはシールリングが嵌着され、突出部の基端にはフランジが周設されている雄側継手とからなり、両継手のフランジが突き合わされた状態で連結部材を装着して接続される継手において、前記面取り部には雌側継手の軸線と平行に延びる円環状のストレート面が設けられ、前記ストレート面の直径は前記挿入孔の内周面の直径よりも大きく、前記シールリングの外径よりも小さく設定されていることを特徴とするものである。
【０００９】
請求項２に記載の発明の継手は、筒状をなし、その一端にはフランジが周設され、内部には断面円形状の挿入孔が貫通形成され、挿入孔の内周面のフランジ側端縁には面取り部が周設されている雌側継手と、筒状をなし、その一端には前記挿入孔に挿入可能な円筒状の突出部を有し、突出部に周設された収容溝にはシールリングが嵌着され、突出部の基端にはフランジが周設されている雄側継手とからなり、両継手のフランジが突き合わされた状態で連結部材を装着して接続される継手において、前記面取り部には雌側継手の軸線と平行に延びる円環状のストレート面が設けられ、前記面取り部のフランジ側端縁から雌側継手の軸線方向内方への深さはシールリングの前記軸線方向の厚みと略同一に設定されていることを特徴とするものである。
【００１１】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づいて詳細に説明する。
図２に示すように、雄側継手１１は筒状をなし、断面円形状の貫通孔１２が貫通形成されている。雄側継手１１の基端部外周面には第１雄ねじ部１３が螺刻され、図示しない水道配管等の管体に螺合可能になっている。雄側継手１１の先端部には円筒状をなす突出部１４が設けられ、該突出部１４の基端には第１フランジ１５が周設されている。そして、第１フランジ１５より基端側には第１環状溝１６が凹設されている。
【００１２】
前記突出部１４の外周面には一対の収容溝１７が周方向に凹設され、各収容溝１７にはゴム材料製の断面円形状をなすシールリング１８がそれぞれ嵌着されている。また、突出部１４の先端外周縁は円弧面１９となっている。
【００１３】
一方、雌側継手２０は筒状をなし、内部には断面円形状の挿入孔２１が貫通形成されている。この挿入孔２１の中央部には、基端側の内径が先端側の内径よりも大きくなる段差部２２が形成され、この段差部２２から基端側は雄側継手１１の突出部１４が挿入される挿入孔２１の拡径部２３となり、先端側は縮径部２４となっている。そして、雄側継手１１の突出部１４が雌側継手２０の挿入孔２１の拡径部２３に挿入されたときには、挿入孔２１の拡径部２３内周面に各シールリング１８の外周面がそれぞれ密接され、雄側継手１１の突出部１４の外周面と雌側継手２０の挿入孔２１の拡径部２３内周面との間がシールされるようになっている。また、雌側継手２０の基端には第２フランジ２５が周設され、該第２フランジ２５より先端側には第２環状溝２６が凹設されている。雌側継手２０の先端部外周面には第２雄ねじ部２７が螺刻され、図示しない水道配管等の管体に螺合可能になっている。
【００１４】
図３に示すように、雌側継手２０のフランジ側端縁２８には面取り部２９が周設されている。この面取り部２９にはフランジ側端縁２８から内方へ順にアール面３０、雌側継手２０の軸線３１と平行に延びる円環状のストレート面３２及びストレート面３２から雌側継手２０の軸線３１方向内方に向かうに従い縮径するテーパ面３３が形成されている。図１に示すように、ストレート面３２の直径は雌側継手２０の挿入孔２１の拡径部２３内周面の直径よりも大きく、雄側継手１１の突出部１４の収容溝１７に嵌着されたシールリング１８の外径よりも小さく設定されている。また、図３に示すように、テーパ面３３の雌側継手２０の軸線３１方向に対する傾斜角度は３０°に設定されている。面取り部２９のフランジ側端縁２８から雌側継手２０の軸線３１方向内方への深さ３４は、シールリング１８の前記軸線３１方向の厚みと略同一に設定されている。
【００１５】
図２に示すように、雄側継手１１と雌側継手２０とは第１フランジ１５及び第２フランジ２５の外端面同士が突き合わされた状態で連結部材としてのクイックファスナー３５を装着することにより連結されている。図４（ａ）、（ｂ）に示すように、クイックファスナー３５は、ばね性を有する金属材料からなる板材を左右対称に曲げることにより、先端部間に開口部を有する略Ｃ環状に形成されている。該クイックファスナー３５の周面上には略等間隔おきにヒンジ部３６が断面コ字状に折曲形成され、両開口端部にはガイド部３７がそれぞれ外方へ拡がるように折り曲げ形成されている。また、クイックファスナー３５の両側壁３８には挟持孔３９がヒンジ部３６を避けるようにしてその周方向に延びるように透設されている。
【００１６】
そして、雄側継手１１の第１フランジ１５と雌側継手２０の第２フランジ２５とが突き合わされた状態で、クイックファスナー３５の挟持孔３９に第１フランジ１５及び第２フランジ２５が挟持されるようにガイド部３７側からクイックファスナー３５を装着するようになっている。ここで、第１フランジ１５及び第２フランジ２５の幅は挟持孔３９を形成する内側壁４０間の間隔とほぼ同じに設定され、第１フランジ１５及び第２フランジ２５がクイックファスナー３５により連結固定されるようになっている。
【００１７】
前記雄側継手１１と、雌側継手２０と、それらを接続するクイックファスナー３５とから本実施形態の継手が構成されている。
次に、実施形態の継手の作用について以下に記載する。
【００１８】
さて、雄側継手１１と雌側継手２０とを接続する場合には、まず、図５に示すように、雄側継手１１の突出部１４を雌側継手２０の挿入孔２１の拡径部２３に挿入する。このとき、雄側継手１１の突出部１４の先端外周縁に設けられた円弧面１９が突出部１４の挿入を容易にする。そして、図６に示すように、雄側継手１１の突出部１４の先端部が雌側継手２０の面取り部２９よりも僅かに内奥側に達したとき、先端側に位置するシールリング１８の外周面が面取り部２９のアール面３０と接触し、シールリング１８が縮径されるように押し込まれる。続いて、図１に示すように、雄側継手１１の突出部１４を雌側継手２０の挿入孔２１の拡径部２３に押し込むとシールリング１８の外周面はストレート面３２に摺接し、シールリング１８は面取り部２９内に収容される。
【００１９】
次いで、雄側継手１１の突出部１４をさらに雌側継手２０の挿入孔２１の拡径部２３に押し込むと、シールリング１８はテーパ面３３に案内されて縮径されながら雌側継手２０の挿入孔２１の拡径部２３内周面に摺接するように移動する。また、もう１つの収容溝１７に嵌着されたシールリング１８も同様に面取り部２９内に収容された後、雌側継手２０の挿入孔２１の拡径部２３内周面へと移動する。そして、雄側継手１１の突出部１４が雌側継手２０の挿入孔２１の拡径部２３に完全に押し込まれ、第１フランジ１５の外端面が第２フランジ２５の外端面に突き合わされる。
【００２０】
このとき、一対のシールリング１８によって雌側継手２０の挿入孔２１の拡径部２３内周面と雄側継手１１の突出部１４の外周面との間がシールされる。
続いて、図５に示すように、第１フランジ１５及び第２フランジ２５の突き合わせ部分にクイックファスナー３５の開口部が上方から押し付けられる。すると、クイックファスナー３５の開口部がその弾性力によって拡げられ、下方に押し込まれたクイックファスナー３５は、やがてその弾性力で元の形状に復帰する。そして、その側壁３８が第１環状溝１６及び第２環状溝２６内にそれぞれ収容されるとともに、挟持孔３９を形成する内側壁４０に第１フランジ１５及び第２フランジ２５が接触した状態で挟持孔３９に嵌入される。この状態でクイックファスナー３５の内側に雄側継手１１の中間部と雌側継手２０の基端部とが包摂されるとともに、挟持孔３９内で第１フランジ１５及び第２フランジ２５が挟着され、雄側継手１１及び雌側継手２０の脱着が規制される。
【００２１】
以上の本実施形態によって発揮される効果について、以下に記載する。
・本実施形態の継手においては、雌側継手２０のフランジ側端縁２８には面取り部２９が周設され、この面取り部２９には雌側継手２０の軸線３１と平行に延びるストレート面３２が設けられている。このため、雄側継手１１の突出部１４を雌側継手２０の挿入孔２１の拡径部２３に押し込むときには、シールリング１８がストレート面３２に摺接されて面取り部２９内に収容される。従って、各収容溝１７からのシールリング１８の抜け出しを防止することができる。
【００２２】
・さらに、面取り部２９に設けられたストレート面３２の直径は雌側継手２０の挿入孔２１の拡径部２３内周面の直径よりも大きく、雄側継手１１の突出部１４の収容溝１７に嵌着されたシールリング１８の外径よりも小さく設定されている。このため、シールリング１８の外周面がストレート面３２と摺接したときには、シールリング１８がストレート面３２に沿って円滑に案内される。これにより、各収容溝１７内からのシールリング１８の抜け出しをより効果的に防止することができる。
【００２３】
・加えて、面取り部２９のフランジ側端縁２８から雌側継手２０の軸線３１方向内方への深さ３４は、シールリング１８の前記軸線３１方向の厚みと略同一に設定されている。このため、雄側継手１１の突出部１４を雌側継手２０の挿入孔２１の拡径部２３に挿入する際は、シールリング１８は面取り部２９内に一旦収容されるとともに、雌側継手２０の軸線３１方向への移動が規制され、収容溝１７内に安定して保持される。しかも、シールリング１８が面取り部２９を経て、雌側継手２０の挿入孔２１の拡径部２３に押し込まれる際にもシールリング１８に無理な力が加わることがないため、各収容溝１７内からのシールリング１８の抜け出しをさらに効果的に防止することができる。
【００２４】
・面取り部２９のテーパ面３３の雌側継手２０の軸線３１方向に対する傾斜角度は３０°に設定されている。このため、ストレート面３２によって縮径されたシールリング１８をさらに段階的に圧縮し、収容溝１７内に安定して保持させた状態で雌側継手２０の挿入孔２１の拡径部２３に押し込むことができる。
【００２５】
・面取り部２９にはストレート面３２よりも基端側にアール面３０が形成されている。このため、該アール面３０がシールリング１８の挿入案内の役割を成し、容易に雌側継手２０の面取り部２９内に押し込むことができる。
【００２６】
・雄側継手１１の突出部１４の外周面には一対のシールリング１８が嵌着されている。このため、雄側継手１１の突出部１４の外周面と雌側継手２０の挿入孔２１の拡径部２３内周面との間が確実にシールされ、継手内からの水漏れの発生を効果的に防止することができる。
【００２７】
なお、本実施形態は、次のように変更して具体化することも可能である。
・面取り部２９のフランジ側端縁２８から雌側継手２０の軸線３１方向内方への深さ３４を、シールリング１８の前記軸線３１方向の厚みよりも大きくしてもよい。
【００２８】
・また、面取り部２９に設けられたアール面３０をテーパ面３３に変更してもよい。
・さらには、面取り部２９に設けられたテーパ面３３をアール面３０に変更してもよい。
【００２９】
・面取り部２９に設けられたテーパ面３３の雌側継手２０の軸線３１方向に対する傾斜角度を、例えば２０°、４０°などに変更してもよい。
・雄側継手１１の突出部１４の外周面に１つのシールリング１８が嵌着される構成に変更してもよい。
【００３０】
・シールリング１８の断面の形状を楕円形のものに変更してもよい。
さらに、前記実施形態より把握できる技術的思想について以下に記載する。
・前記面取り部にはストレート面の両端部にアール面及びテーパ面の少なくとも一方が形成されている請求項１又は請求項２に記載の継手。
この構成によれば、シールリングは容易に面取り部内に押し込まれ、シールリングを収容溝内に安定に保持した状態で雌側継手の挿入孔の拡径部に押し込むことができる。
【００３１】
・前記面取り部のフランジ側端縁から雌側継手の軸線方向内方への深さは、シールリングの前記軸線方向の厚みよりも大きく設定されている請求項２に記載の継手。この構成によれば、面取り部内に収容されたシールリングは、雌側継手の軸線方向の移動がさらに規制され、収容溝内にさらに安定して保持することができる。
【００３２】
【発明の効果】
以上詳述したように、この発明によれば、次のような効果を奏する。
請求項１に記載の発明の継手によれば、シールリングの抜け出しを防止することができる。
【００３３】
請求項２に記載の発明の継手によれば、シールリングの抜け出しをさらに効果的に防止することができる。
【図面の簡単な説明】
【図１】実施形態におけるシールリングが面取り部内に収容された状態を示す部分拡大側断面図。
【図２】実施形態の継手を示す側断面図。
【図３】雌側継手の面取り部を示す拡大側断面図。
【図４】（ａ）はクイックファスナーを示す斜視図、（ｂ）は図４（ａ）の４ｂ―４ｂ線における断面図。
【図５】実施形態の継手を示す分解側断面図。
【図６】シールリングが面取り部内に収容され始める状態を示す拡大側断面図。
【符号の説明】
１１…雄側継手、１４…突出部、１５…フランジとしての第１フランジ、１７…収容溝、１８…シールリング、２０…雌側継手、２１…挿入孔、２５…フランジとしての第２フランジ、２８…フランジ側端縁、２９…面取り部、３１…軸線、３２…ストレート面、３４…深さ、３５…連結部材としてのクイックファスナー。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe joint used for water pipes, hot water pipes, floor heating, road heating, and the like.
[0002]
[Prior art]
Conventionally, joints have been used to connect pipes made of cross-linked polyethylene or polybutene, for example, to water pipes. As this type of joint, the following is known (for example, see Patent Document 1). That is, it is a type constituted by inserting one end of a male side joint into a female side joint and connecting two joints. The female side joint has an insertion hole penetrating in the center, and a flange is projected from the outer peripheral surface of the base end portion. Further, a flange is provided on the outer peripheral surface of the intermediate portion of the male side joint, and a protrusion that is inserted into the insertion hole of the female side joint is provided on the tip side of the flange. A chamfered portion that expands in diameter from the distal end edge toward the inner side in the axial direction of the male side joint is provided around the outer peripheral surface of the distal end portion of the protruding portion. In addition, a housing groove is provided in the center of the protruding portion, and a seal ring as a seal member is fitted.
[0003]
In order to connect the female side joint and the male side joint, first, the protruding portion of the male side joint is inserted into the insertion hole of the female side joint. At this time, the chamfered portion of the male side joint serves as an insertion guide. And after the protrusion part of a male side joint is completely inserted in the insertion hole of a female side joint and the flange provided in each joint is faced | matched, a connection member is mounted | worn to this butted part.
[0004]
As a result, the female-side joint and the male-side joint are connected by the connecting member, and the gap between the proximal end inner peripheral surface of the female-side joint and the protruding portion outer peripheral surface of the male-side joint is sealed by the seal ring.
[0005]
[Patent Document 1]
JP 2000-65260 A (pages 3 to 4, FIG. 1)
[0006]
[Problems to be solved by the invention]
However, in a narrow space such as behind a wall or under the floor, the male side joint may be connected from an oblique direction with respect to the axial direction of the female side joint. In this case, the seal ring fitted in the receiving groove provided in the protrusion of the male joint comes into contact with the insertion hole side edge of the female joint, and in this state, an excessive force is applied to the protrusion of the male joint. When the portion is inserted into the insertion hole of the female joint, there is a problem that the seal ring may be pushed out of the receiving groove.
[0007]
The present invention has been made paying attention to the problems existing in the prior art as described above. The object is to provide a joint capable of preventing the seal ring from coming off.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the joint according to the first aspect of the present invention has a cylindrical shape, a flange is provided around one end thereof, and an insertion hole having a circular cross section is formed therethrough. A female side joint having a chamfered portion is provided on the flange side edge of the inner peripheral surface of the hole, and has a cylindrical shape, and at one end thereof has a cylindrical protrusion that can be inserted into the insertion hole, A seal ring is fitted in the receiving groove provided around the projecting part, and the base end of the projecting part consists of a male joint with a flange provided around it. In the joint to be connected by attaching a member, the chamfered portion is provided with an annular straight surface extending in parallel with the axis of the female side joint, and the diameter of the straight surface is larger than the diameter of the inner peripheral surface of the insertion hole. greater, that is smaller than the outer diameter of the seal ring It is an butterfly.
[0009]
The joint according to the second aspect of the present invention has a cylindrical shape, a flange is provided around one end thereof, an insertion hole having a circular cross section is formed through the inside, and the flange side end of the inner peripheral surface of the insertion hole A female-side joint having a chamfered portion around the edge, and a cylindrical shape, and a cylindrical protrusion that can be inserted into the insertion hole at one end thereof, and a receiving groove that is provided around the protrusion Is a male joint that is fitted with a seal ring and a flange is provided around the base end of the protrusion. The chamfered portion is provided with an annular straight surface extending in parallel with the axis of the female side joint, and the depth from the flange side end of the chamfered portion to the inner side in the axial direction of the female side joint is der which is characterized in that it is set to substantially the same as the thickness of the axial .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 2, the male joint 11 has a cylindrical shape, and a through hole 12 having a circular cross section is formed therethrough. A first male screw portion 13 is threaded on the outer peripheral surface of the base end portion of the male joint 11 so that it can be screwed into a pipe body such as a water pipe (not shown). A cylindrical projecting portion 14 is provided at the distal end of the male joint 11, and a first flange 15 is provided around the base end of the projecting portion 14. A first annular groove 16 is recessed on the proximal end side from the first flange 15.
[0012]
A pair of receiving grooves 17 are recessed in the circumferential direction on the outer peripheral surface of the projecting portion 14, and a seal ring 18 made of a rubber material and having a circular cross section is fitted in each receiving groove 17. Further, the outer peripheral edge at the tip of the protruding portion 14 is an arcuate surface 19.
[0013]
On the other hand, the female joint 20 has a cylindrical shape, and an insertion hole 21 having a circular cross section is formed through the inside. A stepped portion 22 having an inner diameter on the proximal end side larger than an inner diameter on the distal end side is formed in the central portion of the insertion hole 21, and the protruding portion 14 of the male joint 11 is inserted from the stepped portion 22 to the proximal end side. The diameter-increasing portion 23 of the insertion hole 21 is formed, and the distal end side is a reduced-diameter portion 24. When the protruding portion 14 of the male side joint 11 is inserted into the enlarged diameter portion 23 of the insertion hole 21 of the female side joint 20, the outer peripheral surface of each seal ring 18 is formed on the inner peripheral surface of the enlarged diameter portion 23 of the insertion hole 21. They are in close contact with each other, and the outer peripheral surface of the protruding portion 14 of the male side joint 11 and the inner peripheral surface of the enlarged diameter portion 23 of the insertion hole 21 of the female side joint 20 are sealed. A second flange 25 is provided around the base end of the female side joint 20, and a second annular groove 26 is provided on the distal end side of the second flange 25. A second male threaded portion 27 is threaded on the outer peripheral surface of the distal end portion of the female side joint 20, and can be screwed into a pipe body such as a water pipe (not shown).
[0014]
As shown in FIG. 3, a chamfered portion 29 is provided around the flange side end edge 28 of the female side joint 20. The chamfered portion 29 is formed in order from the flange side end edge 28 inward to the rounded surface 30, an annular straight surface 32 extending parallel to the axis 31 of the female side joint 20, and the straight surface 32 to the axis 31 direction of the female side joint 20. A tapered surface 33 that is reduced in diameter as it goes inward is formed. As shown in FIG. 1, the diameter of the straight surface 32 is larger than the diameter of the inner peripheral surface of the enlarged diameter portion 23 of the insertion hole 21 of the female side joint 20, and is fitted in the receiving groove 17 of the protruding portion 14 of the male side joint 11. The outer diameter of the seal ring 18 is set to be smaller. Further, as shown in FIG. 3, the inclination angle of the tapered surface 33 with respect to the direction of the axis 31 of the female side joint 20 is set to 30 °. A depth 34 from the flange side edge 28 of the chamfered portion 29 to the inside of the female side joint 20 in the direction of the axis 31 is set substantially equal to the thickness of the seal ring 18 in the direction of the axis 31.
[0015]
As shown in FIG. 2, the male joint 11 and the female joint 20 are connected by attaching a quick fastener 35 as a connecting member in a state where the outer end surfaces of the first flange 15 and the second flange 25 are abutted with each other. Has been. As shown in FIGS. 4 (a) and 4 (b), the quick fastener 35 is formed in a substantially C-annular shape having an opening between tip portions by bending a plate material made of a metal material having spring properties symmetrically. ing. On the peripheral surface of the quick fastener 35, hinge portions 36 are bent in a substantially U-shaped cross section at substantially equal intervals, and guide portions 37 are bent at both opening ends so as to expand outward. Yes. Further, sandwiching holes 39 are formed on both side walls 38 of the quick fastener 35 so as to extend in the circumferential direction so as to avoid the hinge portion 36.
[0016]
The first flange 15 and the second flange 25 are held in the holding holes 39 of the quick fastener 35 in a state where the first flange 15 of the male side joint 11 and the second flange 25 of the female side joint 20 are abutted. Thus, the quick fastener 35 is mounted from the guide portion 37 side. Here, the widths of the first flange 15 and the second flange 25 are set to be substantially the same as the interval between the inner side walls 40 forming the holding holes 39, and the first flange 15 and the second flange 25 are connected and fixed by the quick fastener 35. It has come to be.
[0017]
The joint of this embodiment is comprised from the said male side coupling 11, the female side coupling 20, and the quick fastener 35 which connects them.
Next, the effect | action of the coupling of embodiment is described below.
[0018]
When connecting the male side joint 11 and the female side joint 20, first, as shown in FIG. 5, the protruding portion 14 of the male side joint 11 is connected to the enlarged diameter portion 23 of the insertion hole 21 of the female side joint 20. Insert into. At this time, an arcuate surface 19 provided on the outer peripheral edge of the protrusion 14 of the male joint 11 facilitates insertion of the protrusion 14. Then, as shown in FIG. 6, when the distal end portion of the protruding portion 14 of the male side joint 11 reaches slightly inward from the chamfered portion 29 of the female side joint 20, the seal ring 18 positioned on the distal end side of the seal ring 18 is located. The outer peripheral surface comes into contact with the rounded surface 30 of the chamfered portion 29, and the seal ring 18 is pushed in so that the diameter thereof is reduced. Subsequently, as shown in FIG. 1, when the protruding portion 14 of the male side joint 11 is pushed into the enlarged diameter portion 23 of the insertion hole 21 of the female side joint 20, the outer peripheral surface of the seal ring 18 comes into sliding contact with the straight surface 32, and the seal The ring 18 is accommodated in the chamfer 29.
[0019]
Next, when the protruding portion 14 of the male side joint 11 is further pushed into the enlarged diameter portion 23 of the insertion hole 21 of the female side joint 20, the seal ring 18 is guided by the tapered surface 33 and the female side joint 20 is inserted while being reduced in diameter. It moves so as to be in sliding contact with the inner peripheral surface of the enlarged diameter portion 23 of the hole 21. Similarly, after the seal ring 18 fitted in the other receiving groove 17 is also housed in the chamfered portion 29, it moves to the inner peripheral surface of the enlarged diameter portion 23 of the insertion hole 21 of the female side joint 20. Then, the protruding portion 14 of the male side joint 11 is completely pushed into the enlarged diameter portion 23 of the insertion hole 21 of the female side joint 20, and the outer end surface of the first flange 15 is abutted against the outer end surface of the second flange 25.
[0020]
At this time, the gap between the inner peripheral surface of the enlarged diameter portion 23 of the insertion hole 21 of the female side joint 20 and the outer peripheral surface of the protruding portion 14 of the male side joint 11 is sealed by the pair of seal rings 18.
Subsequently, as shown in FIG. 5, the opening of the quick fastener 35 is pressed from above onto the butted portion of the first flange 15 and the second flange 25. Then, the opening of the quick fastener 35 is expanded by the elastic force, and the quick fastener 35 pushed downward is eventually restored to its original shape by the elastic force. The side walls 38 are accommodated in the first annular groove 16 and the second annular groove 26, respectively, and are clamped with the first flange 15 and the second flange 25 in contact with the inner wall 40 forming the clamping hole 39. It is inserted into the hole 39. In this state, the intermediate portion of the male side joint 11 and the base end portion of the female side joint 20 are included inside the quick fastener 35, and the first flange 15 and the second flange 25 are sandwiched in the clamping hole 39. The detachment of the male side joint 11 and the female side joint 20 is restricted.
[0021]
The effects exhibited by the above embodiment will be described below.
In the joint of the present embodiment, a chamfered portion 29 is provided around the flange side end edge 28 of the female side joint 20, and a straight surface 32 extending parallel to the axis 31 of the female side joint 20 is provided on the chamfered portion 29. Is provided. Therefore, when the protruding portion 14 of the male side joint 11 is pushed into the enlarged diameter portion 23 of the insertion hole 21 of the female side joint 20, the seal ring 18 is slidably brought into contact with the straight surface 32 and accommodated in the chamfered portion 29. Accordingly, it is possible to prevent the seal ring 18 from coming out of each housing groove 17.
[0022]
Further, the diameter of the straight surface 32 provided in the chamfered portion 29 is larger than the diameter of the inner peripheral surface of the enlarged diameter portion 23 of the insertion hole 21 of the female side joint 20, and the receiving groove 17 of the protruding portion 14 of the male side joint 11. It is set smaller than the outer diameter of the seal ring 18 fitted in. For this reason, when the outer peripheral surface of the seal ring 18 comes into sliding contact with the straight surface 32, the seal ring 18 is smoothly guided along the straight surface 32. As a result, it is possible to more effectively prevent the seal ring 18 from coming out of each housing groove 17.
[0023]
In addition, the depth 34 from the flange side edge 28 of the chamfered portion 29 to the inside of the female side joint 20 in the axial line 31 direction is set to be substantially the same as the thickness of the seal ring 18 in the axial line 31 direction. For this reason, when the protruding portion 14 of the male side joint 11 is inserted into the enlarged diameter portion 23 of the insertion hole 21 of the female side joint 20, the seal ring 18 is once accommodated in the chamfered portion 29 and the female side joint 20. Movement in the direction of the axis 31 is restricted and stably held in the receiving groove 17. In addition, since no excessive force is applied to the seal ring 18 when the seal ring 18 is pushed into the enlarged diameter portion 23 of the insertion hole 21 of the female side joint 20 through the chamfered portion 29, It is possible to more effectively prevent the seal ring 18 from coming off.
[0024]
The inclination angle of the tapered surface 33 of the chamfered portion 29 with respect to the direction of the axis 31 of the female side joint 20 is set to 30 °. For this reason, the seal ring 18 that has been reduced in diameter by the straight surface 32 is further compressed stepwise and pushed into the enlarged diameter portion 23 of the insertion hole 21 of the female joint 20 while being stably held in the receiving groove 17. be able to.
[0025]
The rounded surface 30 is formed on the chamfered portion 29 on the proximal end side with respect to the straight surface 32. Therefore, the rounded surface 30 serves as an insertion guide for the seal ring 18 and can be easily pushed into the chamfered portion 29 of the female side joint 20.
[0026]
A pair of seal rings 18 are fitted on the outer peripheral surface of the protrusion 14 of the male joint 11. For this reason, the space between the outer peripheral surface of the protruding portion 14 of the male side joint 11 and the inner peripheral surface of the enlarged diameter portion 23 of the insertion hole 21 of the female side joint 20 is reliably sealed, and the occurrence of water leakage from the inside of the joint is effective. Can be prevented.
[0027]
In addition, this embodiment can also be changed and embodied as follows.
The depth 34 from the flange side edge 28 of the chamfered portion 29 to the inside of the female side joint 20 in the direction of the axis 31 may be larger than the thickness of the seal ring 18 in the direction of the axis 31.
[0028]
In addition, the rounded surface 30 provided in the chamfered portion 29 may be changed to the tapered surface 33.
Furthermore, the tapered surface 33 provided on the chamfered portion 29 may be changed to the rounded surface 30.
[0029]
-You may change the inclination-angle with respect to the axis line 31 direction of the female side joint 20 of the taper surface 33 provided in the chamfer 29 to 20 degrees, 40 degrees, etc., for example.
-You may change into the structure by which the one seal ring 18 is fitted by the outer peripheral surface of the protrusion part 14 of the male side coupling 11. FIG.
[0030]
-The cross-sectional shape of the seal ring 18 may be changed to an elliptical one.
Further, the technical idea that can be grasped from the embodiment will be described below.
The joint according to claim 1 or 2 , wherein at least one of a rounded surface and a tapered surface is formed at both ends of the straight surface in the chamfered portion.
According to this configuration, the seal ring can be easily pushed into the chamfered portion, and can be pushed into the enlarged diameter portion of the insertion hole of the female side joint while the seal ring is stably held in the housing groove.
[0031]
The joint according to claim 2 , wherein a depth from the flange side end edge of the chamfered portion to an inner side in the axial direction of the female side joint is set larger than a thickness of the seal ring in the axial direction. According to this configuration, the seal ring accommodated in the chamfered portion is further restricted from moving in the axial direction of the female side joint, and can be more stably held in the accommodating groove.
[0032]
【The invention's effect】
As described in detail above, the present invention has the following effects.
According to the joint of the first aspect of the present invention, it is possible to prevent the seal ring from coming out.
[0033]
According to the joint of the invention according to 請 Motomeko 2, it is possible to more effectively prevent the escape of the sealing ring.
[Brief description of the drawings]
FIG. 1 is a partially enlarged side sectional view showing a state in which a seal ring according to an embodiment is accommodated in a chamfered portion.
FIG. 2 is a side sectional view showing the joint according to the embodiment.
FIG. 3 is an enlarged side sectional view showing a chamfered portion of a female side joint.
4A is a perspective view showing a quick fastener, and FIG. 4B is a cross-sectional view taken along line 4b-4b in FIG. 4A.
FIG. 5 is an exploded side sectional view showing the joint according to the embodiment.
FIG. 6 is an enlarged side sectional view showing a state in which the seal ring starts to be accommodated in the chamfered portion.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Male side joint, 14 ... Projection part, 15 ... 1st flange as a flange, 17 ... Housing groove, 18 ... Seal ring, 20 ... Female side joint, 21 ... Insertion hole, 25 ... 2nd flange as a flange, 28 ... flange side edge, 29 ... chamfered portion, 31 ... axis, 32 ... straight surface, 34 ... depth, 35 ... quick fastener as a connecting member.

Claims

It has a cylindrical shape, and a flange is provided at one end of the tube. An insertion hole having a circular cross section is formed through the inside, and a chamfered portion is provided at the flange side edge of the inner peripheral surface of the insertion hole. The female joint has a cylindrical shape, one end of which has a cylindrical protruding portion that can be inserted into the insertion hole, and a seal ring is fitted into a receiving groove provided around the protruding portion. In the joint that is connected to the base end of the joint with a male side joint with a flange provided around it, and with the connecting member mounted in a state where the flanges of both joints are abutted,
The chamfered portion is provided with an annular straight surface extending in parallel with the axis of the female joint, and the diameter of the straight surface is larger than the diameter of the inner peripheral surface of the insertion hole and is larger than the outer diameter of the seal ring. A joint characterized by being set small .

It has a cylindrical shape, and a flange is provided at one end of the tube. An insertion hole having a circular cross section is formed through the inside, and a chamfered portion is provided at the flange side edge of the inner peripheral surface of the insertion hole. The female joint has a cylindrical shape, one end of which has a cylindrical protruding portion that can be inserted into the insertion hole, and a seal ring is fitted into a receiving groove provided around the protruding portion. In the joint that is connected to the base end of the joint with a male side joint with a flange provided around it, and with the connecting member mounted in a state where the flanges of both joints are abutted,
The chamfered portion is provided with an annular straight surface extending in parallel with the axis of the female side joint, and the depth from the flange side end of the chamfered portion to the inner side in the axial direction of the female side joint is the axis of the seal ring. A joint characterized by being set to be substantially the same as the thickness in the direction .