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JP4703044B2 - Spigot fitting - Google Patents

Spigot fitting Download PDF

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Publication number
JP4703044B2
JP4703044B2 JP2001204292A JP2001204292A JP4703044B2 JP 4703044 B2 JP4703044 B2 JP 4703044B2 JP 2001204292 A JP2001204292 A JP 2001204292A JP 2001204292 A JP2001204292 A JP 2001204292A JP 4703044 B2 JP4703044 B2 JP 4703044B2
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JP
Japan
Prior art keywords
stopper
groove
socket
insertion portion
outer periphery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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JP2001204292A
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Japanese (ja)
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JP2003021287A (en
Inventor
直樹 吉田
恒治 畠山
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Piolax Inc
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Piolax Inc
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Priority to JP2001204292A priority Critical patent/JP4703044B2/en
Publication of JP2003021287A publication Critical patent/JP2003021287A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00Couplings of the quick-acting type
    • F16L37/08Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/088Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a split elastic ring
    • F16L37/0885Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a split elastic ring with access to the split elastic ring from a radial or tangential opening in the coupling

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、一方の管端に形成されたソケットと、他方の管端に形成された差込み部とで構成され、前記差込み部を前記ソケットに挿入したとき、前記差込み部外周の溝に、前記ソケットに設けたストッパが嵌合して接続されるようにしたスピゴット継手に関する。
【0002】
【従来の技術】
管と管との接続に際して、一方の管の端部にソケットを設け、他方の管の端部を差込み部として、差込み部をソケットに挿入するだけで、ワンタッチで接続されるようにしたスピゴット継手(いんろう継手)は、例えば自動車のラジエータホースの接続など、各種の管やホースやチューブの接続に広く用いられている。
【0003】
このようなスピゴット継手として、例えば特開平10−9470号公報には、雌管の外周に外周溝を設け、その外周溝に内外径を貫通して所要角度で対向する切欠き溝を設け、無切欠き溝部の谷周径部に止具腕を係合させ、各切欠き溝に上記止具腕から伸びる各係止腕を架け渡して係止させ、各係止腕の一部は雌管内に突出して、雄管の外周の溝に嵌合するようにした管継手が開示されている。
【0004】
【発明が解決しようとする課題】
しかしながら、上記従来の管継手においては、係止腕が、雄管の外周の溝に対して直線状に交差しているので、雄管の外周の溝に対して接線に近い、浅い角度で交差している。
【0005】
このため、管の内部に加圧流体等が通されて、継手に強い引張力が作用すると、この引張力が、止具の係止腕を外方に押し広げる分力となり、係止腕が外径方向に広がって、雄管の溝から外れてしまう可能性があるという問題点があった。特に、自動車のラジエータホース等の継手においては、エンジンとラジエータの振動によって、上記止具の外れ現象が起こりやすくなる。
【0006】
したがって、本発明の目的は、強い引張力が作用しても、ストッパが外れないようにしたスピゴット継手を提供することにある。
【0007】
【課題を解決するための手段】
上記目的を達成するために、本発明の第1は、一方の管端に形成されたソケットと、他方の管端に形成された差込み部とで構成され、前記ソケットには管の中心を挟んで対向する両側の周面に設けた一対の切欠き溝に全体的に門形をなすストッパが装着されていて、前記差込み部を前記ソケットに挿入したとき、前記差込み部外周の溝に前記ストッパが嵌合して双方の管端を結合するスピゴット継手において、前記差込み部外周の溝に前記ストッパが嵌合した状態で、前記ストッパの門形をなす両端部が、それぞれ前記差込み部外周の溝と2箇所で交差し、前記ストッパの基部側に位置する交差部分は、直線状をなして前記差込み部外周の溝に対して接線方向に交差し、前記ストッパの端部側に位置する交差部分のみが、内側に屈曲して前記差込み部外周の溝に対する交差角を増大させて前記切欠き溝に戻る形状をなすことを特徴とするスピゴット継手を提供するものである。
【0008】
上記発明によれば、ストッパの両端部と、差込み部外周の溝とが交差する部分において、ストッパの両端部が屈曲して交差角が大きくされているので、継手に強い引張力が作用しても、ストッパを押し広げる方向に働く分力が小さくなり、ストッパの外れを防止することができる。
また、ストッパの交差角を増大させる屈曲部を、差込み部外周の溝と交差する部分であって、ストッパの端部側に位置する部分にのみ設けることにより、差込み部を挿入するときのストッパの開き角度を小さくして、挿入時の荷重をできるだけ小さく保つことができる。
【0009】
本発明の第2は、前記第1の発明において、前記ストッパの端部側に位置する交差部分が、内側に円弧状に屈曲して前記差込み部外周の溝に対する交差角を増大させた形状をなすスピゴット継手を提供するものである。
【0011】
本発明の第3は、前記第1又は第2の発明において、前記ソケットの切欠き溝の管端側の内壁、及び/又は、前記差込み部の溝の管端側の内壁には、前記ストッパが嵌合して外方に広げられるのを防止する凹部が設けられているスピゴット継手を提供するものである。
【0012】
上記発明によれば、継手に強い引張力が作用したとき、ストッパがソケットの切欠き溝の管端側の内壁、及び/又は、差込み部の溝の管端側の内壁に嵌合するので、ストッパの拡開が規制され、ストッパの外れ防止効果をより高めることができる。
【0013】
本発明の好ましい態様によれば、上記ストッパが嵌合する凹部は、上記ストッパの基部側が当接する部分が狭い幅をなし、上記ストッパの両端部側が当接する部分が広い幅をなしている。この態様によれば、ストッパの基部側が狭い幅の凹部に嵌合し、ストッパの両端部側が広い幅の凹部に嵌合することにより、ストッパの両端部側に形成された屈曲部分が凹部に嵌合できるようにすると共に、凹部の形状をシンプルにして成形を容易にすることができる。
【0014】
【発明の実施の形態】
図1〜9には、本発明のスピゴット継手の一実施形態が示されている。図1は同継手の分解斜視図、図2は同継手のソケットの斜視図、図3は同ソケットの端面図、図4は同ソケットの側面図、図5は同ソケットにストッパを装着する途中の状態を示す説明図、図6は同ソケットにストッパを装着した状態を示す説明図、図7は同ソケットに差込み部を挿入する状態を示す断面図、図8は従来のストッパと切欠き溝とのなす角度を示す説明図、図9は同実施形態のストッパと切欠き溝とのなす角度を示す説明図である。
【0015】
このスピゴット継手10は、接続すべき一方の管20の端部に形成された差込み部21と、他方の管30の端部に形成されたソケット31と、ソケット31に装着される屈曲ワイヤで形成されたストッパ60とで構成されている。
【0016】
差込み部21は、先端テーパ部22から、ストレート部23を経て、拡径テーパ部24に至る形状をなすと共に、拡径テーパ部24の頂部外周に、環状溝部25と位置決め用突起26とが形成された構造をなしている。
【0017】
ソケット31は、管30に対して所定角度、この実施形態の場合、約60度で連結されている。また、この実施形態では、管30のソケット31と反対側の端部が、図示しないホース、チューブ等に差し込まれる、先細テーパ状の差込み口32をなしている。
【0018】
特に図7に示すように、ソケット31は、段階的に拡径する形状をなし、差込み口32の内径よりもやや拡径した内径の第1拡径部33と、この第1拡径部33からやや拡径した第2拡径部34と、第2拡径部34から更に拡径した第3拡径部35とを有する。
【0019】
上記第1拡径部33は、上記差込み部21の先端テーパ部22が挿入される内径をなしている。上記第2拡径部34には、Oリング等の環状シール部材36が配置され、更に、この環状シール部材36の抜け止めを図る押えリング37が挿入されている。
【0020】
第3拡径部35には、上記差込み部21の拡径テーパ部24と、環状溝部25とが配置され、この環状溝部25に前記ストッパ60が嵌合して抜け止めされるようになっている。また、ソケット31の第3拡径部35には、前記差込み部21の位置決め用突起26が挿入されるガイド溝36が形成されている。
【0021】
ソケット31の第3拡径部35には、ストッパ60が挿入される切欠き溝37が形成されている。切欠き溝37は、第3拡径部35の周方向の対向する部分に沿って、ソケット31の内外を貫通するようにスリット状に形成されている。切欠き溝37を構成する一対のスリットの中間には、前記ガイド溝36を囲む膨出壁部38が位置している。
【0022】
第3拡径部35外周の切欠き溝37の上半部には、切欠き溝37の対向縁部から突出するリブ39が形成され、ストッパ60を挟んで確実に保持するようにしている。第3拡径部35外周の切欠き溝37の中間部には、ソケット31の端部側に、周方向に沿った断面がV字状の凹部40が形成されている。第3拡径部35外周の切欠き溝37の下端には、ストッパ60の端部を収容するためのコ字状の壁で囲まれた収容凹部41が形成されている。
【0023】
ストッパ60は、全体として門形に屈曲させたワイヤ等で構成されている。ストッパ60の中央部には、前記膨出壁部38の外周に適合する外方屈曲部61が形成されている。ストッパ60の両端部には、ソケット31の軸方向、差込み口側に向けてほぼ90°で屈曲された前方屈曲部62が形成されている。更に、前方屈曲部62からやや基部寄り部分には、内側に円弧状に屈曲した内方屈曲部63が形成されている。
【0024】
図5、6には、上記ストッパ60をソケット31に装着する状態が示されている。すなわち、ストッパ60の両端部を広げながら、ソケット31の切欠き溝37に挿入しつつ上方から被せると、まず、ストッパ60の前方屈曲部62が、ソケット31外周のV字状の凹部40に嵌合して仮保持される。この状態で更に強く下方に押し込むと、ストッパ60の両端部が再び広がりながらスライドし、前方屈曲部62が収容凹部41に嵌合する。
【0025】
このとき、図2に示すように、ストッパ60の両端部は、ソケット31の切欠き溝37に挿入されて、その一部が切欠き溝37の内周から内側に突出した状態となり、特に内側屈曲部63は、内側に大きく突出する。このとき、ストッパ60の各端部は、切欠き溝37の円周を弦のように横切って、切欠き溝37と上下2箇所で交差するが、上記内側屈曲部63は、そのうちの下方の交差部分に形成されていて、上方の交差部分には屈曲部は設けられていない。
【0026】
次に、このスピゴット継手10の作用について説明する。
一対の管20、30を接続する際には、位置決め用突起26をガイド溝36に合わせながら、一方の管20の差込み部21を、他方の管30のソケット31に挿入する。すると、ストッパ61の切欠き溝37から内側に突出した部分が、差込み部21の拡径テーパ部24に当接して押し広げられながら、差込み部21が挿入されていく。そして、ストッパ61の両端部が、差込み部21の環状溝部25に嵌合して、一方の管20と他方の管30が連結される。
【0027】
このときのストッパ61と差込み部21との関係が図9に示されている。すなわち、図9中の25は差込み部21の環状溝部であり、27は差込み部21の周壁の断面である。ストッパ61の各端部は、差込み部21の環状溝部25に入り込んでおり、環状溝部25の外周の上下2箇所で交差する。
【0028】
このうち、上方の交差部分Aでは、ストッパ61の各端部が環状溝部25に対して接線方向に交差している。一方、ストッパ61の端部寄りにある下方の交差部分Bでは、内側屈曲部63によって環状溝部25に対する交差角θが増大するようになっている。
【0029】
これに対して、従来のストッパ80を用いた例が図8に示されている。すなわち、従来一般的なストッパ80は、その両端部が直線状をなしており、差込み部21の環状溝部25に対して直線状に交差する。その結果、上下の交差部分A、Bのいずれも接線方向に交差し、環状溝部25に対する交差角θが小さくなっている。
【0030】
一対の管20、30の間に引張力が作用したとき、ストッパ60、80は、環状溝部25の内壁に押付けられるが、この押付け力によって、ストッパ60、80を押し広げる分力F1、F2が発生する。この分力は、ストッパの環状溝部25に対する交差角θが小さいほど大きくなるので、F1<F2となる。
【0031】
すなわち、内側屈曲部63を設けることによって、環状溝部25に対する交差角θを増大させたストッパ60を用いた本発明の継手は、従来一般的なストッパ80を用いた継手に比べて、一対の管20、30の間に引張力が作用したとき、ストッパが広がりにくくなり、外れにくくなる。したがって、一対の管20、30をより強固に連結することができる。
【0032】
一方、ストッパ60の内側屈曲部63は、下方の交差部分Bにのみ設けられ、上方の交差部分Aは接線方向に交差しているので、管20の差込み部21をソケット31に挿入するときの挿入荷重はそれほど増大しないようにされている。すなわち、挿入荷重をできるだけ増大させずに、引き抜き抵抗力が大きくとれるようになっている。
【0033】
なお、連結された一対の管20、30を再び分離したいときには、ドライバ等の先端をストッパ60の外側屈曲部61に挿入し、ストッパ60を上方に引き上げると、ストッパ60が開いて上方にスライドし、前方屈曲部62がV字状の溝40に係合して仮止めされる。この状態では、ストッパ60が切欠き溝37の内周から突出しないので、管20の差込み部21をソケット31から容易に引き抜くことができる。
【0034】
図10、11には、本発明のスピゴット継手の他の実施形態が示されている。
このスピゴット継手は、基本的には前記図1〜9に示した実施形態と同様な構造をなしているが、管20の差込み部21の環状溝部25の内面に線状の凹部28を設けた点が異なっている。
【0035】
この凹部28は、環状溝部25の、管20の先端側の内壁に形成されている。そして、凹部28の幅は、ストッパ60の基部側に位置する部分の幅Cが小さくされ、ストッパ60の先端側に位置する部分の幅Dが大きくされている。すなわち、ストッパ60の基部側に位置する部分の幅Cは、ストッパ60の線幅が適合できる程度の幅とされ、ストッパ60の先端側に位置する部分の幅Dは、ストッパ60の屈曲部63が挿入できる程度の幅とされている。これによって、凹部28の形状をシンプルにして成形等を容易にすると共に、ストッパ60がガタ付きなく保持されるようにしている。
【0036】
この実施形態によれば、一対の管20、30に引張力が作用し、ストッパ60が環状溝部25の、管20の先端側の内壁に圧接されたとき、上記凹部28に嵌合するため、ストッパ60が広げられて外れることをより確実に防止できる。
【0037】
図12、13には、本発明のスピゴット継手の更に他の実施形態が示されている。
このスピゴット継手は、基本的には、前記実施形態と同様であるが、凹部28の代わりに、環状溝部25の、管20の先端側の内壁に突部29を設けている点が相違する。言いかえれば、突部29以外が凹部となっている。これによれば、環状溝部25の構造が更にシンプルになり、成形等が容易になる。
【0038】
なお、ストッパ60の開き止め構造としては、上記のように、環状溝部25に凹部を設けるだけでなく、それと共に、あるいはその代わりに、ソケット31の切欠き溝37の先端側(差込み口側)の内壁に、ストッパ60が嵌合する凹部を設けてもよい。
【0039】
【発明の効果】
以上説明したように、本発明によれば、ストッパの両端部と、差込み部外周の溝とが交差する部分において、ストッパの両端部が屈曲して交差角が大きくされているので、継手に強い引張力が作用しても、ストッパを押し広げる方向に働く分力が小さくなり、ストッパの外れを防止することができる。
【図面の簡単な説明】
【図1】 本発明のスピゴット継手の一実施形態を示す分解斜視図
【図2】 同継手のソケットの斜視図
【図3】 同ソケットの端面図
【図4】 同ソケットの側面図
【図5】 同ソケットにストッパを装着する途中の状態を示す説明図
【図6】 同ソケットにストッパを装着した状態を示す説明図
【図7】 同ソケットに差込み部を挿入する状態を示す断面図
【図8】 従来のストッパと切欠き溝とのなす角度を示す説明図
【図9】 同実施形態のストッパと切欠き溝とのなす角度を示す説明図
【図10】 本発明のスピゴット継手の他の実施形態を示す差込み部の環状溝とストッパとの関係を示す側面図
【図11】 図10のXI−XI線に沿った断面図
【図12】 本発明のスピゴット継手の更に他の実施形態を示す差込み部の環状溝とストッパとの関係を示す側面図
【図13】 図12のXIII−XIII線に沿った断面図
【符号の説明】
10 スピゴット継手
20 一方の管
21 差込み部
24 拡径テーパ部
25 環状溝部
28 凹部
29 突部
30 他方の管
31 ソケット
37 切欠き溝
60 ストッパ
63 内側屈曲部
[0001]
BACKGROUND OF THE INVENTION
The present invention comprises a socket formed at one tube end and an insertion portion formed at the other tube end, and when the insertion portion is inserted into the socket, the groove on the outer periphery of the insertion portion The present invention relates to a spigot joint in which a stopper provided in a socket is fitted and connected.
[0002]
[Prior art]
When connecting pipes to each other, a spigot joint is provided with a socket at the end of one pipe, and the end of the other pipe is used as an insertion part. (Circum joints) are widely used for connecting various pipes, hoses and tubes, for example, connecting radiator hoses of automobiles.
[0003]
As such a spigot joint, for example, in Japanese Patent Laid-Open No. 10-9470, an outer peripheral groove is provided on the outer periphery of the female tube, and a notch groove that penetrates the inner and outer diameters and faces at a required angle is provided in the outer peripheral groove. Engage the stopper arm with the valley circumference of the notch groove, and bridge and lock the locking arms extending from the stopper arm in each notch groove, and a part of each locking arm is inside the female tube. And a pipe joint that is fitted into a groove on the outer periphery of the male pipe.
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional pipe joint, since the locking arm intersects the outer peripheral groove of the male pipe in a straight line, it intersects the outer peripheral groove of the male pipe at a shallow angle close to a tangent line. is doing.
[0005]
For this reason, when a pressurized fluid or the like is passed through the inside of the pipe and a strong tensile force acts on the joint, this tensile force becomes a component force that pushes the locking arm of the fastener outward, and the locking arm is There was a problem that it spreads in the outer diameter direction and may come off from the groove of the male tube. In particular, in a joint such as a radiator hose of an automobile, the fastener is likely to come off due to vibrations of the engine and the radiator.
[0006]
Accordingly, an object of the present invention is to provide a spigot joint in which a stopper is not removed even when a strong tensile force is applied.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a first aspect of the present invention comprises a socket formed at one end of a tube and an insertion portion formed at the other end of the tube, with the center of the tube sandwiched between the sockets. A pair of notch grooves provided on the peripheral surfaces on both sides facing each other is mounted with a stopper that forms a gate shape as a whole, and when the insertion portion is inserted into the socket, the stopper is inserted into the outer periphery groove of the insertion portion. In a spigot joint that joins both pipe ends by fitting, both ends forming the portal shape of the stopper are grooves in the outer periphery of the insertion portion in a state where the stopper is fitted in the groove in the outer periphery of the insertion portion. The crossing portion that intersects with two places and is located on the base side of the stopper intersects the tangential direction with respect to the groove on the outer periphery of the insertion portion in a straight line, and is located on the end side of the stopper Only bend inwardly said There is provided a spigot joint, characterized in that to increase the crossing angle with respect to the groove of the write portion periphery a shape to return to the notched groove.
[0008]
According to the above invention, at the portion where both ends of the stopper intersect with the groove on the outer periphery of the insertion portion, both ends of the stopper are bent and the crossing angle is increased, so that a strong tensile force acts on the joint. However, the component force acting in the direction of expanding the stopper is reduced, and the stopper can be prevented from coming off.
Also, by providing a bent portion that increases the crossing angle of the stopper at a portion that intersects the groove on the outer periphery of the insertion portion and that is located on the end side of the stopper, the bending portion of the stopper when inserting the insertion portion is provided. By reducing the opening angle, the load during insertion can be kept as small as possible.
[0009]
According to a second aspect of the present invention, in the first aspect of the present invention, the intersecting portion located on the end side of the stopper is bent inwardly in an arc shape to increase the intersecting angle with respect to the groove on the outer periphery of the insertion portion. An spigot joint is provided.
[0011]
According to a third aspect of the present invention, in the first or second aspect of the invention, the stopper is provided on the inner wall on the tube end side of the notch groove of the socket and / or on the inner wall on the tube end side of the groove of the insertion portion. The spigot joint is provided with a recess that prevents the fitting from being expanded and spread outward.
[0012]
According to the above invention, when a strong tensile force acts on the joint, the stopper is fitted to the inner wall on the tube end side of the notch groove of the socket and / or the inner wall on the tube end side of the groove of the insertion portion. The expansion of the stopper is restricted, and the stopper removal preventing effect can be further enhanced.
[0013]
According to a preferred aspect of the present invention, the recess into which the stopper is fitted has a narrow width at a portion where the base side of the stopper abuts and a wide width at a portion where both ends of the stopper abut. According to this aspect, the bent portion formed on the both end sides of the stopper fits into the recess by fitting the base side of the stopper into the narrow recess and the both ends of the stopper into the wide recess. In addition, the shape of the concave portion can be simplified and molding can be facilitated.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
1 to 9 show an embodiment of a spigot joint of the present invention. 1 is an exploded perspective view of the joint, FIG. 2 is a perspective view of the socket of the joint, FIG. 3 is an end view of the socket, FIG. 4 is a side view of the socket, and FIG. FIG. 6 is an explanatory view showing a state where a stopper is mounted on the socket, FIG. 7 is a cross-sectional view showing a state where an insertion portion is inserted into the socket, and FIG. 8 is a conventional stopper and a notch groove. FIG. 9 is an explanatory view showing the angle formed by the stopper and the notch groove of the same embodiment.
[0015]
The spigot joint 10 is formed by an insertion portion 21 formed at an end portion of one tube 20 to be connected, a socket 31 formed at an end portion of the other tube 30, and a bending wire attached to the socket 31. It is comprised with the stopper 60 made.
[0016]
The insertion portion 21 has a shape extending from the tip tapered portion 22 through the straight portion 23 to the enlarged diameter tapered portion 24, and an annular groove portion 25 and a positioning projection 26 are formed on the outer periphery of the top portion of the enlarged diameter tapered portion 24. The structure is made.
[0017]
The socket 31 is connected to the tube 30 at a predetermined angle, in this embodiment, about 60 degrees. Moreover, in this embodiment, the edge part on the opposite side to the socket 31 of the pipe | tube 30 has comprised the taper-shaped insertion port 32 inserted in the hose, tube, etc. which are not shown in figure.
[0018]
In particular, as shown in FIG. 7, the socket 31 has a shape that gradually increases in diameter, and has a first enlarged portion 33 having an inner diameter slightly larger than the inner diameter of the insertion port 32, and the first enlarged portion 33. The second diameter-expanded portion 34 is slightly expanded from the second diameter-expanded portion 34 and the third diameter-expanded portion 35 is further expanded from the second diameter-expanded portion 34.
[0019]
The first enlarged diameter portion 33 has an inner diameter into which the tip tapered portion 22 of the insertion portion 21 is inserted. An annular seal member 36 such as an O-ring is disposed in the second enlarged diameter portion 34, and a presser ring 37 for preventing the annular seal member 36 from being inserted is inserted.
[0020]
In the third enlarged diameter portion 35, the enlarged diameter tapered portion 24 of the insertion portion 21 and the annular groove portion 25 are disposed, and the stopper 60 is fitted into the annular groove portion 25 so as to be prevented from coming off. Yes. Further, a guide groove 36 into which the positioning protrusion 26 of the insertion portion 21 is inserted is formed in the third enlarged diameter portion 35 of the socket 31.
[0021]
The third enlarged diameter portion 35 of the socket 31 is formed with a notch groove 37 into which the stopper 60 is inserted. The notch groove 37 is formed in a slit shape so as to penetrate the inside and the outside of the socket 31 along the circumferentially opposed portion of the third enlarged diameter portion 35. A bulging wall portion 38 surrounding the guide groove 36 is located between the pair of slits constituting the notch groove 37.
[0022]
A rib 39 protruding from the opposite edge of the notch groove 37 is formed in the upper half of the notch groove 37 on the outer periphery of the third enlarged diameter portion 35 so as to be securely held with the stopper 60 interposed therebetween. A concave portion 40 having a V-shaped cross section along the circumferential direction is formed on the end portion side of the socket 31 in the middle portion of the cutout groove 37 on the outer periphery of the third enlarged diameter portion 35. An accommodation recess 41 surrounded by a U-shaped wall for accommodating the end of the stopper 60 is formed at the lower end of the notch groove 37 on the outer periphery of the third enlarged diameter portion 35.
[0023]
The stopper 60 is formed of a wire bent in a gate shape as a whole. An outward bent portion 61 that fits the outer periphery of the bulging wall portion 38 is formed at the center of the stopper 60. At both ends of the stopper 60, a front bent portion 62 is formed that is bent at approximately 90 ° toward the insertion port side in the axial direction of the socket 31. Further, an inwardly bent portion 63 that is bent inward in an arc shape is formed slightly toward the base portion from the front bent portion 62.
[0024]
5 and 6 show a state in which the stopper 60 is mounted on the socket 31. FIG. That is, when both ends of the stopper 60 are widened and inserted into the notch groove 37 of the socket 31 and covered from above, first, the front bent portion 62 of the stopper 60 is fitted into the V-shaped recess 40 on the outer periphery of the socket 31. It is temporarily held together. When pushed further downward in this state, both end portions of the stopper 60 slide while expanding again, and the front bent portion 62 is fitted into the receiving recess 41.
[0025]
At this time, as shown in FIG. 2, both ends of the stopper 60 are inserted into the notch groove 37 of the socket 31, and a part of the stopper 60 protrudes inward from the inner periphery of the notch groove 37. The bent part 63 protrudes greatly inward. At this time, each end portion of the stopper 60 crosses the circumference of the notch groove 37 like a string and intersects the notch groove 37 at two places in the upper and lower sides. It is formed at the intersecting portion, and no bent portion is provided at the upper intersecting portion.
[0026]
Next, the operation of the spigot joint 10 will be described.
When connecting the pair of tubes 20 and 30, the insertion portion 21 of one tube 20 is inserted into the socket 31 of the other tube 30 while aligning the positioning projection 26 with the guide groove 36. Then, the insertion portion 21 is inserted while the portion protruding inward from the notch groove 37 of the stopper 61 abuts against the diameter-increasing taper portion 24 of the insertion portion 21 and is expanded. Then, both end portions of the stopper 61 are fitted into the annular groove portion 25 of the insertion portion 21, and the one tube 20 and the other tube 30 are connected.
[0027]
The relationship between the stopper 61 and the insertion portion 21 at this time is shown in FIG. That is, 25 in FIG. 9 is an annular groove portion of the insertion portion 21, and 27 is a cross section of the peripheral wall of the insertion portion 21. Each end portion of the stopper 61 enters the annular groove portion 25 of the insertion portion 21, and intersects at two places above and below the outer periphery of the annular groove portion 25.
[0028]
Among these, in the upper intersection portion A, each end portion of the stopper 61 intersects the annular groove portion 25 in the tangential direction. On the other hand, at the lower intersection B near the end of the stopper 61, the inner bent portion 63 increases the intersection angle θ with respect to the annular groove 25.
[0029]
On the other hand, an example using a conventional stopper 80 is shown in FIG. That is, both ends of the conventional general stopper 80 are linear, and intersect with the annular groove 25 of the insertion portion 21 linearly. As a result, the upper and lower intersecting portions A and B both intersect in the tangential direction, and the intersecting angle θ with respect to the annular groove portion 25 is small.
[0030]
When a tensile force is applied between the pair of tubes 20 and 30, the stoppers 60 and 80 are pressed against the inner wall of the annular groove 25. With this pressing force, the component forces F 1 and F that expand the stoppers 60 and 80 are pushed. 2 occurs. Since this component force increases as the crossing angle θ with respect to the annular groove portion 25 of the stopper decreases, F 1 <F 2 is satisfied.
[0031]
That is, the joint of the present invention using the stopper 60 in which the crossing angle θ with respect to the annular groove portion 25 is increased by providing the inner bent portion 63 is a pair of pipes as compared with the joint using the conventional general stopper 80. When a tensile force is applied between 20 and 30, the stopper is difficult to spread and difficult to come off. Therefore, a pair of pipes 20 and 30 can be connected more firmly.
[0032]
On the other hand, the inner bent portion 63 of the stopper 60 is provided only at the lower intersection portion B, and the upper intersection portion A intersects in the tangential direction, so that the insertion portion 21 of the tube 20 is inserted into the socket 31. The insertion load is not so increased. That is, the pulling resistance can be increased without increasing the insertion load as much as possible.
[0033]
When it is desired to separate the pair of connected tubes 20 and 30 again, the tip of a driver or the like is inserted into the outer bent portion 61 of the stopper 60, and when the stopper 60 is pulled upward, the stopper 60 opens and slides upward. The front bent portion 62 engages with the V-shaped groove 40 and is temporarily fixed. In this state, since the stopper 60 does not protrude from the inner periphery of the notch groove 37, the insertion portion 21 of the tube 20 can be easily pulled out from the socket 31.
[0034]
10 and 11 show another embodiment of the spigot joint of the present invention.
The spigot joint basically has the same structure as that of the embodiment shown in FIGS. 1 to 9, but a linear recess 28 is provided on the inner surface of the annular groove 25 of the insertion portion 21 of the pipe 20. The point is different.
[0035]
The recess 28 is formed on the inner wall of the annular groove 25 on the distal end side of the tube 20. As for the width of the recess 28, the width C of the portion located on the base side of the stopper 60 is reduced, and the width D of the portion located on the tip side of the stopper 60 is increased. In other words, the width C of the portion located on the base side of the stopper 60 is set to a width that allows the line width of the stopper 60 to be adapted, and the width D of the portion located on the distal end side of the stopper 60 is the bent portion 63 of the stopper 60. The width is such that can be inserted. Thus, the shape of the concave portion 28 is simplified to facilitate molding and the like, and the stopper 60 is held without backlash.
[0036]
According to this embodiment, when a tensile force acts on the pair of tubes 20 and 30 and the stopper 60 is pressed against the inner wall of the annular groove 25 on the distal end side of the tube 20, it fits into the recess 28. It can prevent more reliably that the stopper 60 is expanded and removed.
[0037]
12 and 13 show still another embodiment of the spigot joint of the present invention.
This spigot joint is basically the same as that of the above embodiment, except that a protrusion 29 is provided on the inner wall of the annular groove 25 on the distal end side of the tube 20 instead of the recess 28. In other words, other than the protrusion 29 is a recess. According to this, the structure of the annular groove 25 is further simplified, and molding and the like are facilitated.
[0038]
As described above, the stopper 60 is not only provided with a recess in the annular groove 25, but in addition to or instead of the recess, the front end side (insertion side) of the notch groove 37 of the socket 31 is provided. You may provide the recessed part which the stopper 60 fits in the inner wall of this.
[0039]
【The invention's effect】
As described above, according to the present invention, at the portion where both ends of the stopper intersect with the groove on the outer periphery of the insertion portion, both ends of the stopper are bent and the crossing angle is increased, so that the joint is strong. Even if a tensile force is applied, the component force acting in the direction of expanding the stopper is reduced, and the stopper can be prevented from coming off.
[Brief description of the drawings]
1 is an exploded perspective view showing an embodiment of a spigot joint of the present invention. FIG. 2 is a perspective view of a socket of the joint. FIG. 3 is an end view of the socket. FIG. 4 is a side view of the socket. ] Explanatory drawing showing the state in the middle of attaching the stopper to the socket [FIG. 6] Explanatory drawing showing the state of attaching the stopper to the socket [FIG. 7] Cross-sectional view showing the state where the insertion part is inserted into the socket [FIG. 8] An explanatory view showing an angle formed by the conventional stopper and the notch groove. [FIG. 9] An explanatory view showing an angle formed by the stopper and the notch groove of the same embodiment. [FIG. 10] Another spigot joint of the present invention. The side view which shows the relationship between the annular groove of the insertion part which shows embodiment, and a stopper [FIG. 11] Sectional drawing along the XI-XI line of FIG. 10 [FIG. 12] Still another embodiment of the spigot joint of this invention. Shown is the relationship between the annular groove and the stopper Side view [Fig. 13] Sectional view along line XIII-XIII in Fig. 12 [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Spigot joint 20 One pipe | tube 21 Insertion part 24 Diameter expansion taper part 25 Annular groove part 28 Recessed part 29 Protrusion part 30 Other pipe | tube 31 Socket 37 Notch groove 60 Stopper 63 Inner bending part

Claims (3)

一方の管端に形成されたソケットと、他方の管端に形成された差込み部とで構成され、
前記ソケットには管の中心を挟んで対向する両側の周面に設けた一対の切欠き溝に全体的に門形をなすストッパが装着されていて、
前記差込み部を前記ソケットに挿入したとき、前記差込み部外周の溝に前記ストッパが嵌合して双方の管端を結合するスピゴット継手において、
前記差込み部外周の溝に前記ストッパが嵌合した状態で、前記ストッパの門形をなす両端部が、それぞれ前記差込み部外周の溝と2箇所で交差し、前記ストッパの基部側に位置する交差部分は、直線状をなして前記差込み部外周の溝に対して接線方向に交差し、前記ストッパの端部側に位置する交差部分のみが、内側に屈曲して前記差込み部外周の溝に対する交差角を増大させて前記切欠き溝に戻る形状をなすことを特徴とするスピゴット継手。
Consists of a socket formed at one tube end and an insertion portion formed at the other tube end,
The socket is fitted with a stopper that forms a gate shape as a whole in a pair of notch grooves provided on both circumferential surfaces facing each other across the center of the tube,
In the spigot joint in which when the insertion part is inserted into the socket, the stopper fits into the groove on the outer periphery of the insertion part and couples both pipe ends,
In the state where the stopper is fitted in the groove on the outer periphery of the insertion portion, both end portions forming the gate shape of the stopper intersect with the groove on the outer periphery of the insertion portion at two locations, respectively, and are located on the base side of the stopper The portion forms a straight line and intersects the groove on the outer periphery of the insertion portion in the tangential direction, and only the intersection portion located on the end side of the stopper is bent inward and intersects the groove on the outer periphery of the insertion portion. A spigot joint characterized by having a shape that increases the angle and returns to the notch groove.
前記ストッパの端部側に位置する交差部分が、内側に円弧状に屈曲して前記差込み部外周の溝に対する交差角を増大させた形状をなす請求項1記載のスピゴット継手。  2. The spigot joint according to claim 1, wherein a crossing portion located on an end side of the stopper is bent inwardly in an arc shape to increase a crossing angle with respect to a groove on the outer periphery of the insertion portion. 前記ソケットの切欠き溝の管端側の内壁、及び/又は、前記差込み部の溝の管端側の内壁には、前記ストッパが嵌合して外方に広げられるのを防止する凹部が設けられている請求項1又は2記載のスピゴット継手。  The inner wall on the tube end side of the notch groove of the socket and / or the inner wall on the tube end side of the groove of the insertion portion is provided with a recess that prevents the stopper from being fitted and spread outward. The spigot joint according to claim 1 or 2.
JP2001204292A 2001-07-05 2001-07-05 Spigot fitting Expired - Lifetime JP4703044B2 (en)

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