JP3562876B2 - Pipe fittings - Google Patents

Pipe fittings Download PDF

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Publication number
JP3562876B2
JP3562876B2 JP18488695A JP18488695A JP3562876B2 JP 3562876 B2 JP3562876 B2 JP 3562876B2 JP 18488695 A JP18488695 A JP 18488695A JP 18488695 A JP18488695 A JP 18488695A JP 3562876 B2 JP3562876 B2 JP 3562876B2
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Japan
Prior art keywords
collar
pipe joint
tube
ball
outer collar
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JP18488695A
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Japanese (ja)
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JPH0914555A (en
Inventor
研二 三根
公一 美奈川
邦裕 田中
嘉晴 西村
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ブリヂストンフローテック株式会社
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Priority to JP18488695A priority Critical patent/JP3562876B2/en
Priority to US08/529,126 priority patent/US5653480A/en
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【0001】
【産業上の利用分野】
本発明は、建設機械及び工作機械等の配管に供される管継手に関し、特に工具の使用が困難なせまいスペ−スで管体を結合、離脱するのに好適な管継手に係るものである。
【0002】
【従来の技術】
従来より、比較的柔軟な合成樹脂やゴム製の管体に使用される管継手にあっては、管体との結合、離脱が比較的簡単なものが実用化されているが、同じ合成樹脂製の管体でも塩化ビニルホ−ス等の比較的硬い管体や金属管等における管継手は、その結合、離脱を自在とするものは数少ない。
【0003】
図14はこの種の管継手の一例であり、食い込み片32を管体40に食い込ませることによって結合を行わせる管継手である。図中、31は管継手の雌体であって、雌体31に螺合された袋状ナット33にて食い込み片32を管体40の表面に押圧食い込ませて結合するものである。しかるに、離脱のために袋状ナット33をゆるめたとしても、管体40より食い込み片32が簡単にはずれないために離脱は殆どできず、例え離脱できたとしても、管体40の表面を傷つけることとなり、このため、これを再度使用した場合には、管体内を流れる流体が漏出する流路となってしまうこともある。
【0004】
このような状況にあって、本出願人は比較的硬い管体を結合、離脱するのに好適な管継手を既に提案している(特開平6−272795号等)。図15はこの既提案の技術の概略を示すものであり、管継手の基体をなす雌体41の大径部42側にコイルバネ43及びボ−ル44を外挿した内カラ−45が嵌め込まれるもので、雌体41よりのびる外カラ−46にてこれらを覆い、外カラ−46にテ−パ−面47を形成してボ−ル44を押さえ、内カラ−45の離脱を防ぐものである。図中、48はシ−ル用O−リングである。しかるに、管体40が内カラ−45に挿入される場合には、その先端が大径部42の最深部(段部)49に当ってその位置が確定して結合が完結する。そして、この管体40を引き抜くために力を加えたり、或いは管体40内に流体を通すとこの管体40は引き抜かれる方向に力が加わるが、ボ−ル44は外カラ−46のテ−パ−面47にて押さえられ、結局このボ−ル44によって管体40の外周表面を押圧することになり、管体40の引き抜きが阻止されることとなる。このように管継手40との結合は簡単であり、しかも使用時には抜け防止機能が働くものである。
【0005】
一方、管体40を引き抜く(離脱)には、内カラ−45の突出端450 を内側に軽く押し込んでやると、テ−パ−面47と管体40の外表面間に介在していたボ−ル44が内カラ−45と共に内方に移動し、管体40の外表面に力が加わっていたボ−ル44の押圧が解除され、この状態を維持しつつ管体40を簡単に引き抜くことができるものである。
【0006】
【発明が解決しようとする課題】
このように、既提案の管継手は構造も比較的簡単でしかも結合、離脱も容易に行えるものであり広く採用されつつある。しかしながら、この既提案の管継手にあっても、更に改良が要請されている面もある。即ち、比較的狭いスペ−スでの結合にあっては、管継手と管体とが相互に偏心している場合があり、この場合の対策、使用時における揺動の吸収、更には管体の回転力への対策等が要請される場合があるが、これらの要請に対しては既提案の管継手にあってはその機能はなかった。
【0007】
【課題を解決するための手段】
本発明は既提案の管継手に上記したような更なる要請に対処するために機能を付加すべく開発されたものであり、その構成は次の通りである。即ち、管継手の基体となる雌体の流路の深部に挿入される管体の先端が当る段部を形成し、深部側より弾性体及び押圧部材を支持した内カラ−が順に配置され、かつ雌体からのびる外カラ−にてこれらを覆いかつ外カラ−先端に深部側が大径となるテ−パ−部を形成してなる管継手であって、当該外カラ−は前記雌体とは別体に構成され、当該外カラ−にて覆われる雌体の外表面の先端を小径となし、外カラ−を周方向に偏心回転可能に係合したことを特徴とする管継手に係るものである。尚、雌体と外カラ−の係合にあってはシ−ル性を特に要求されず、例えば係合面を止め輪、硬球、加締等によって係合することができる。
【0008】
【作用】
さて、本発明は上記のような構造を有するため、管継手と金属管等の管体との結合にあっては、雌体の内カラ−の先端より管体を挿入し、雌体の流路の深部に設けた段部に挿入された管体の先端が当ることにより結合されることとなる。そして、管体の外周表面に内カラ−内に納まった押圧部材、例えばボ−ルが接触することによって結合されるもので、このボ−ルは弾性体により内カラ−と共に内カラ−の先端側に押されるが、このボ−ルは外カラ−のテ−パ−面に接触し、その押圧力が管体の表面に向かうこととなり、ここで管継手と管体との結合が保持されることとなる。通常は、雌体の流路の内周に一つ又は複数の周溝を形成し、これにシ−ル用O−リングを嵌め込んで管体との間のシ−ルを完全に行うものである。
【0009】
一方、管継手からの管体の離脱は次の通りである。結合された管継手と管体にあって、内カラ−の先端を内側に押すことによって、外カラ−のテ−パ−面に接触されているボ−ルを内カラ−と共に内側に移動する。即ち、ボ−ルは外カラ−との接触が解かれ、管体の表面を押す力を解除することとなり、この状態を保ちつつ管体を引き抜くことによって両者の離脱が簡単に行えることとなったものである。次いで、管体を離脱した後に内カラ−を押す力をゆるめれば、再び弾性体によって内カラ−が押されて元の状態に戻ることとなり、ここに管体の結合、離脱が繰り返されることとなるのである。
【0010】
本発明の最大の特徴は、外カラ−にて覆われる雌体の外表面の先端を小径とした管継手である。そして、外カラ−が雌体とは別体に構成され、これが周方向に回転可能とされたもので、しかも係合部位の横ずれによって外カラ−が若干偏心回転することができることとなったことにその特徴があり、このため管継手に対して若干偏心している管体であっても前記した結合・離脱が無理なく行うことができることとなったものである。又、外カラ−が周方向に偏心回転可能とされたが故に管体の揺動や回転に追随できることとなり、これらの余計な力を吸収し、かつ耐久性能を著しく向上させたこととなったものである。
【0011】
本発明で用いられる弾性体としてはコイルバネ、皿バネ、筒状のゴム弾性体が主として用いられ、これは内カラ−に弾発支持力を与えるものである。そしてこの内カラ−にあっては、外カバ−の先端部より縁部がやや突出しているのがよく、これを押すことによって管体の離脱機能が与えられることとなる。又、内、外カラ−は合成樹脂製又は金属製で構成され、特に内カラ−にあっては、外周面側の径が大きいテ−パ−孔を穿孔し、ここに硬球ボ−ル等の押圧部材を挿入すればよいこととなる。尚、内カラ−にあって、その外径を深部側が大径で、かつ径方向に縮径を可能とするスリット又は凹部を有することによって、更に管体の引き抜き阻止力を増すことができる。
【0012】
【実施例】
以下、本発明の管継手を実施例をもって更に詳細に説明する。
図1は本発明の管継手の第1実施例を示す半裁断面図である。図中、1は管継手の基体をなす雌体であって、段部2をはさんで右側に大径部3の流路が、そして左側に小径部4の流路が形成されている。そして大径部3の内面に2条の周溝5、5が備えられ、ここにO−リング6、6が嵌め込まれている。この大径部3の縁端にコイルバネ7及び合成樹脂製の内カラ−8が、ボ−ル9と共に配置され、これら全体を外カラ−10にて覆うものである。この外カラ−10は雌体1の大径部3の外周面に外挿されたものであって、その先端が縮径されてテ−パ−部11を形成している。雌体1の深部に設けられた段部2は、挿入された管体40の先端が当ることとなり、管体40の挿入が完全であるか否かはこの段部2に管体40の先端が当るか否かによって確かめることができる。
【0013】
大径部3の外周面と外カラ−10との係合手段は種々あるが、図例にあっては大径部3の外周面と外カラ−10の内周面に周溝12、13を形成し、ここに止め輪14を嵌め込んで係止させるものである。
【0014】
従って、外カラ−10は雌体の大径部2に対して周方向に回転可能となり、特に、図例のように大径部3の先端の外縁を順次やや径を小さく(符号A)してある。このことによって図2に示すように外カラ−10が雌体に対してスム−ズに偏心回転可能となったものである。
【0015】
図3は本発明の管継手の第2実施例であり、特に大径部3と外カラ−10との係止部の拡大図である。この例にあっては、大径部3の外周面に周溝15を、外カラ−10に孔16及びこれに連なる周溝17を形成し、この孔16より硬球ボ−ル18を挿入してなる係止方法を示すものである。従って、外カラ−10は雌体の大径部2に対して周方向に回転可能となり、特に、図例のように大径部3の先端の外縁を順次やや径を小さく(符号A)してある。このことによって外カラ−10が雌体に対してスム−ズに偏心回転可能となったものである。
【0016】
図4は本発明の管継手の第3実施例であり、特に大径部3と外カラ−10との係止部の拡大図である。この例にあっては、大径部3の表面に周段部19を形成しておき、ここに外カラ−10の内側先端100 を加締めることによって係止した例である。尚、図示はしないが周段部19の代わりに突条でもよいことは勿論である。従って、外カラ−10は雌体の大径部2に対して周方向に回転可能となり、特に、図例のように大径部3の先端の外縁を順次やや径を小さく(符号A)してある。このことによって外カラ−10が雌体に対してスム−ズに偏心回転可能となったものである。
【0017】
図5は内カラ−8とボ−ル9との関係を示す断面図であり、内カラ−8の外周側よりにテ−パ−状の孔23を穿孔し、ここにボ−ル9を嵌め込んだ構造のものである。図6はその変形例を示す断面図である。
【0018】
ここで図1を例として管継手と管体との結合及び離脱を更に詳細に述べる。この図1において、管体40が内カラ−8内に若干挿入された場合であり、管体40はその先端が段部2に当たってその位置が確定される。ここで管体40をこの状態から引き抜くために力を入れた場合、或いはこの状態で管体40内に流体を流した場合、即ち、管体40が引き抜かれる方向に力が働いた場合には、ボ−ル9はコイルバネ7の弾発力によって外カラ−10のテ−パ−部11側に押し付けられると共に、その外カラ−10のテ−パ−部11によってこのボ−ル9が管体40の表面を押圧することとなり、ここに管体40の管継手からの引き抜きが阻止されることとなる。
【0019】
さて、管体40を管継手より離脱する場合は、前記内カラ−8の先端80 が外カラ−10の先端101 よりも突出しておりこれを利用することとなる。即ち、管体40を引き抜くには、内カラ−8の先端80 を雌体1の方向に押すことによって管体40が抜けるものである。言い換えれば、この内カラ−8の突出部分80 を押すことによって内カラ−8を雌体1側に移動することとなり、ボ−ル9もこれと共に移動し、テ−パ−部11との接触による締め付け力が解除され、ここに管体40を雌体1から容易に引き抜くことができるものである。
【0020】
尚、内カラ−8と外カラ−10との関係にあっては、必ずしも内カラ−8の先端80 が突出している必要はなく、外部からこの内カラ−8を雌体1側に移動させることができればよい。図7はその例を示す部分断面図であり、内カラ−8の先端80 が外カラ−10より突出していなくとも、ドライバ−24等で押せればよく、更には外カラ−10に小さな孔25を開けておき、ここにドライバ−24等を押し込んで内カラ−8を雌体1側に移動させることもできる。
【0021】
ボ−ル9は外カラ−10のテ−パ−部11によって管体40側におされ、図8に示すように管体40の外表面に食い込むことになる。更に過大な圧力又は引き抜き力がかかった場合には、内カラ−8はボ−ル9及び管体40に追従して外カラ−10の小径側へ移動するため、内カラ−8の大径部は外カラ−10のテ−パ−部11によって管体40側におされ、図9に示すようにより強固に管体40を把持することとなる。
【0022】
さて、図10は本発明に特に有効に用いられる内カラ−8の正面図であり、図11は図10のA−A線での断面図である。即ち、この内カラ−8はボ−ル9を支持すると共に外表面側の4ケ所に凹み26を形成し、その部分の内カラ−は薄肉部27としたものである。そして、図12及び図13は前記図8及び図9に示した内カラ−8に過大な圧力又は引き抜き力がかかった状態における内カラ−8の正面図及びその断面図である。この場合、凹み26によって形成された薄膜部27が外側に折れ曲がる271 こととなり、内カラ−8の縮径を容易にしている。かかる構造の内カラ−を採用した継手においては、押圧材がボ−ルのみの継手に比べて1.5〜2倍程度の引き抜き阻止力を有することが判明した。 尚、内カラ−8の凹み26は薄膜部27をもたない完全なスリット形状でもよいが、管体40を挿入する前に内カラ−8が変形しないように薄膜部27を残した形状のものが好ましい。
【0023】
【発明の効果】
本発明は以上の構成を採用したことにより、硬度の高い管体であってもその結合及び離脱が自由にできることとなったものであり、特にスペ−スの狭い場所での着脱が容易になり、その産業上の効果は極めて大きい。
【図面の簡単な説明】
【図1】図1は本発明の管継手の第1実施例を示す半裁断面図である。
【図2】図2は図1の管継手の側面図である。
【図3】図3は本発明の管継手の第2実施例を示す部分断面図である。
【図4】図4は本発明の管継手の第3実施例を示す部分断面図である。
【図5】図5は内カラ−とボ−ルとの関係を示す切り欠き部分断面図である。
【図6】図6は内カラ−とボ−ルとの関係を示す別例の切り欠き部分断面図である。
【図7】図7は内カラ−と外カラ−との間の別の関係を示す部分断面図である。
【図8】図8は内カラ−とボ−ルの使用状態を示す部分断面図である。
【図9】図9は過大な圧力がかかった場合の内カラ−とボ−ルの使用状態を示す部分断面図である。
【図10】図10は本発明に特に有効に用いられる内カラ−の正面図である。
【図11】図11は図10に示す内カラ−のA−A線での断面図である。
【図12】図12は図10に示す内カラ−の使用状態を示す正面図である。
【図13】図13は図10に示す内カラ−の使用状態を示すA−A線断面図である。
【図14】図14は従来の管継手の一例を示す半裁断面図である。
【図15】図15は本出願人が既に提案した管継手の断面図である。
【符号の説明】
1‥‥管継手の基体をなす雌体、
2‥‥流路の段部、
3‥‥流路の大径部、
4‥‥流路の小径部、
5‥‥大径部3の内面の周溝、
6‥‥O−リング、
7‥‥コイルバネ、
8‥‥内カラ−、
0 ‥‥内カラ−の先端、
9、18‥‥硬質ボ−ル、
10‥‥外カラ−、
100 ‥‥外カラ−の内側先端(加締部)、
101 ‥‥外カラ−の先端、
11‥‥外カラ−のテ−パ−部、
12、20‥‥大径部の周溝、
13、21‥‥外カラ−の周溝、
14、22‥‥止め輪、
15‥‥大径部の外周面の周溝、
16‥‥外カラ−に形成した孔、
17‥‥孔16に連なる周溝、
19‥‥大径部の表面の周段部、
23‥‥内カラ−の外周側のボ−ルの収納孔、
24‥‥ドライバ−、
25‥‥外カラ−に開けた孔、
26‥‥内カラ−の外表面側の凹み、
27‥‥内カラ−の薄肉部、
40‥‥管体、
A‥‥雌体外表面の小径部。
[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint used for piping of a construction machine, a machine tool, and the like, and more particularly to a pipe joint suitable for connecting and detaching a pipe in a space where it is difficult to use a tool. .
[0002]
[Prior art]
Conventionally, pipe joints used for relatively flexible synthetic resin or rubber pipes have been put into practical use that are relatively easy to connect to and disconnect from the pipe. There are few pipe joints made of relatively hard pipes such as vinyl chloride hose or metal pipes which can be freely connected and detached.
[0003]
FIG. 14 shows an example of this type of pipe joint, which is a pipe joint in which a bite piece 32 is bitten into a pipe body 40 to perform a connection. In the figure, reference numeral 31 denotes a female body of a pipe joint, which is formed by pressing a biting piece 32 into a surface of a pipe body 40 by a bag-like nut 33 screwed to the female body 31. However, even if the bag-shaped nut 33 is loosened for detachment, the bite 32 is not easily detached from the tube 40, so that it is hardly detached, and even if it can be detached, the surface of the tube 40 is damaged. As a result, when this is used again, it may become a flow path through which the fluid flowing through the pipe leaks.
[0004]
In such a situation, the present applicant has already proposed a pipe joint suitable for connecting and detaching a relatively hard pipe body (Japanese Patent Laid-Open No. 6-272795). FIG. 15 shows the outline of this proposed technique. An inner collar 45, in which a coil spring 43 and a ball 44 are extrapolated, is fitted into a large diameter portion 42 of a female body 41 forming a base of a pipe joint. These are covered with an outer collar 46 extending from the female body 41, and a taper surface 47 is formed on the outer collar 46 to hold down the ball 44 to prevent the inner collar 45 from coming off. is there. In the figure, reference numeral 48 denotes an O-ring for sealing. However, when the tube body 40 is inserted into the inner collar 45, its tip hits the deepest portion (step portion) 49 of the large-diameter portion 42, the position is determined, and the connection is completed. When a force is applied to pull out the tube 40 or a fluid is passed through the tube 40, a force is applied in a direction in which the tube 40 is pulled out. And the ball 44 presses the outer peripheral surface of the tube 40, thereby preventing the tube 40 from being pulled out. As described above, the connection with the pipe joint 40 is simple, and at the time of use, the function of preventing the detachment works.
[0005]
On the other hand, the withdrawal of the tube 40 (withdrawal), the'll push lightly projecting end 45 0 of the inner collar -45 inwardly, Te - Pa - were interposed between the outer surface of the face 47 and the tube 40 The ball 44 moves inward together with the inner collar 45, and the pressing of the ball 44, which has exerted a force on the outer surface of the tube 40, is released. It can be pulled out.
[0006]
[Problems to be solved by the invention]
As described above, the pipe joints already proposed have a relatively simple structure and can be easily connected and disconnected, and are being widely adopted. However, even in the pipe joints already proposed, there is a demand for further improvement. That is, in connection with a relatively narrow space, the pipe joint and the pipe body may be eccentric to each other, and a countermeasure in this case, absorption of swing during use, and furthermore, In some cases, countermeasures against rotational force, etc., are required, but these requests did not have the function of the previously proposed pipe joint.
[0007]
[Means for Solving the Problems]
The present invention has been developed to add a function to the already proposed pipe joint in order to cope with the above-mentioned further demands, and the configuration thereof is as follows. That is, a step is formed where the tip of the pipe inserted into the deep part of the flow path of the female body serving as the base of the pipe joint is formed, and the inner collar supporting the elastic body and the pressing member from the deep side is arranged in order, And a pipe joint formed by covering these with an outer collar extending from the female body and forming a tapered portion having a large diameter on the deep side at the tip of the outer collar. Is a separate part, the tip of the outer surface of the female body covered by the outer collar is formed to have a small diameter, and the outer collar is engaged eccentrically rotatable in the circumferential direction. Things. The female body and the outer collar are not particularly required to have a sealing property. For example, the engaging surface can be engaged by a snap ring, a hard ball, a caulking or the like.
[0008]
[Action]
Now, since the present invention has the above-described structure, when connecting the pipe joint to a pipe such as a metal pipe, the pipe is inserted from the tip of the inner collar of the female body, and the flow of the female body is performed. The ends of the pipes inserted into the steps provided in the deep part of the road are joined by hitting. A pressing member, for example, a ball, which is housed in an inner collar, is brought into contact with the outer peripheral surface of the tube body by being brought into contact with the inner body. This ball contacts the tapered surface of the outer collar, and the pressing force is directed to the surface of the tube, where the connection between the pipe joint and the tube is maintained. The Rukoto. Usually, one or more circumferential grooves are formed on the inner periphery of the female body flow path, and an O-ring for sealing is fitted into this groove to completely seal with the pipe. It is.
[0009]
On the other hand, detachment of the pipe from the pipe joint is as follows. By pushing the tip of the inner collar inward in the coupled joint and tube, the ball in contact with the taper surface of the outer collar is moved inward together with the inner collar. . That is, the contact between the ball and the outer collar is released, and the force for pushing the surface of the tube is released. By pulling out the tube while maintaining this state, the two can be easily separated from each other. It is something. Next, if the force for pushing the inner collar is loosened after detaching the tubular body, the inner collar is pushed again by the elastic body to return to the original state, and the joining and detaching of the tubular body are repeated here. It becomes.
[0010]
The greatest feature of the present invention is a pipe joint having a small diameter at the tip of the outer surface of the female body covered with the outer collar. The outer collar is formed separately from the female body, and is rotatable in the circumferential direction. In addition, the outer collar can be slightly eccentrically rotated due to the lateral displacement of the engagement portion. Therefore, even if the pipe is slightly eccentric with respect to the pipe joint, the above-mentioned connection and detachment can be performed without difficulty. In addition, since the outer collar can be eccentrically rotated in the circumferential direction, it can follow the swing and rotation of the tube, absorbing these extra forces and significantly improving the durability performance. Things.
[0011]
As the elastic member used in the present invention, a coil spring, a disc spring, or a rubber elastic member having a cylindrical shape is mainly used, which gives a resilient supporting force to the inner collar. The inner collar preferably has a slightly protruding edge from the tip of the outer cover, and by pressing this, a detaching function of the tube is provided. The inner and outer collars are made of synthetic resin or metal. Particularly, in the case of the inner collar, a taper hole having a large diameter on the outer peripheral surface side is formed, and a hard ball ball or the like is formed here. Suffices to be inserted. By providing a slit or recess in the inner collar, the outer diameter of which is large on the deep side and whose diameter can be reduced in the radial direction, the pull-out preventing force of the tubular body can be further increased.
[0012]
【Example】
Hereinafter, the pipe joint of the present invention will be described in more detail with reference to examples.
FIG. 1 is a half sectional view showing a first embodiment of the pipe joint of the present invention. In the figure, reference numeral 1 denotes a female body which forms a base of a pipe joint. A flow path of a large-diameter portion 3 is formed on the right side of a step portion 2 and a flow path of a small-diameter portion 4 is formed on the left side. The inner surface of the large diameter portion 3 is provided with two circumferential grooves 5, 5, into which O-rings 6, 6 are fitted. A coil spring 7 and an inner collar 8 made of synthetic resin are arranged at the edge of the large-diameter portion 3 together with a ball 9, and the whole is covered with an outer collar 10. The outer collar 10 is extrapolated to the outer peripheral surface of the large-diameter portion 3 of the female body 1, and has a tapered portion 11 whose distal end is reduced in diameter. The step 2 provided in the deep part of the female body 1 is to be hit by the tip of the inserted tube 40, and whether the insertion of the tube 40 is complete or not is determined by the tip of the tube 40. Can be confirmed by whether or not it hits.
[0013]
There are various means for engaging the outer peripheral surface of the large diameter portion 3 with the outer collar 10, but in the illustrated example, the circumferential grooves 12, 13 are provided on the outer peripheral surface of the large diameter portion 3 and the inner peripheral surface of the outer collar 10. Is formed, and the retaining ring 14 is fitted and locked therein.
[0014]
Therefore, the outer collar 10 is rotatable in the circumferential direction with respect to the large-diameter portion 2 of the female body. In particular, the outer edge of the tip of the large-diameter portion 3 is gradually reduced in diameter (symbol A) as shown in FIG. It is. As a result, the outer collar 10 can be smoothly and eccentrically rotated with respect to the female body as shown in FIG.
[0015]
FIG. 3 is a second embodiment of the pipe joint of the present invention, and is an enlarged view of a locking portion between the large diameter portion 3 and the outer collar 10, in particular. In this example, a peripheral groove 15 is formed on the outer peripheral surface of the large diameter portion 3, a hole 16 and a peripheral groove 17 connected thereto are formed in the outer collar 10, and a hard ball ball 18 is inserted through the hole 16. FIG. Therefore, the outer collar 10 is rotatable in the circumferential direction with respect to the large-diameter portion 2 of the female body. In particular, the outer edge of the tip of the large-diameter portion 3 is gradually reduced in diameter (symbol A) as shown in FIG. It is. As a result, the outer collar 10 can be smoothly and eccentrically rotated with respect to the female body.
[0016]
FIG. 4 is a third embodiment of the pipe joint according to the present invention, and is an enlarged view of a locking portion between the large diameter portion 3 and the outer collar 10, in particular. In the this example, previously formed a Shudan portion 19 on the surface of the large-diameter portion 3, an example of locked by caulking the inner end 10 0 of the outer collar -10 here. Although not shown, it is a matter of course that a ridge may be used instead of the peripheral step portion 19. Therefore, the outer collar 10 is rotatable in the circumferential direction with respect to the large-diameter portion 2 of the female body. In particular, the outer edge of the tip of the large-diameter portion 3 is gradually reduced in diameter (symbol A) as shown in FIG. It is. As a result, the outer collar 10 can be smoothly and eccentrically rotated with respect to the female body.
[0017]
FIG. 5 is a cross-sectional view showing the relationship between the inner collar 8 and the ball 9. A tapered hole 23 is formed from the outer periphery of the inner collar 8, and the ball 9 is inserted therein. It has a fitted structure. FIG. 6 is a cross-sectional view showing a modification.
[0018]
Here, the connection and detachment of the pipe joint and the pipe body will be described in more detail with reference to FIG. 1 as an example. In FIG. 1, the tube 40 is slightly inserted into the inner collar 8, and the position of the tube 40 is determined by the tip of the tube 40 hitting the step 2. Here, when a force is applied to pull out the tube 40 from this state, or when a fluid flows in the tube 40 in this state, that is, when a force acts in a direction in which the tube 40 is pulled out, The ball 9 is pressed against the taper portion 11 of the outer collar 10 by the elastic force of the coil spring 7, and the ball 9 is formed by the taper portion 11 of the outer collar 10. This presses the surface of the body 40, which prevents the pipe body 40 from being pulled out of the fitting.
[0019]
Now, when leaving the tube 40 from the pipe joint, and thus the tip 8 0 of the inner collar -8 to use this protrudes from the front end 10 1 of the outer shell 10. That is, the withdrawal of the tube 40, in which the tubular body 40 by pressing the tip 8 0 of the inner collar -8 in the direction of the female body 1 comes out. In other words, the inner collar -8 will be moved to the female body 1 side by pushing the projecting portions 8 0 of the inner collar -8, ball - Le 9 also moves with it, Te - Pa - Part 11 of The tightening force due to the contact is released, and the tube 40 can be easily pulled out from the female body 1 here.
[0020]
The mobile In the relationship between the inner collar -8 and the outer shell 10, it is not necessary to tip 8 0 of the inner collar -8 necessarily protrudes, the inner collar -8 to female body 1 side from the outside Anything that can be done. Figure 7 is a partial sectional view showing an example thereof, even the tip 8 0 of the inner collar -8 not protrude from the outer collar 10, may be Osere driver -24, etc., even small outside collar -10 The hole 25 may be opened, and the inner collar 8 may be moved toward the female body 1 by pushing a driver 24 or the like into the hole 25.
[0021]
The ball 9 is placed on the side of the tubular body 40 by the taper portion 11 of the outer collar 10, and cuts into the outer surface of the tubular body 40 as shown in FIG. If an excessive pressure or pull-out force is applied, the inner collar 8 follows the ball 9 and the tube 40 and moves to the smaller diameter side of the outer collar 10, so that the inner collar 8 has a larger diameter. The portion is placed on the tube 40 side by the taper portion 11 of the outer collar 10, and the tube 40 is more firmly gripped as shown in FIG.
[0022]
FIG. 10 is a front view of the inner collar 8 particularly effectively used in the present invention, and FIG. 11 is a sectional view taken along line AA of FIG. That is, the inner collar 8 supports the ball 9 and forms the recesses 26 at four places on the outer surface side, and the inner collar at that portion is a thin portion 27. FIGS. 12 and 13 are a front view and a cross-sectional view of the inner collar 8 in a state where an excessive pressure or pulling force is applied to the inner collar 8 shown in FIGS. 8 and 9, respectively. In this case, the thin film portion 27 formed by the recess 26 becomes 27 1 to bent outwardly to facilitate the diameter of the inner collar -8. It has been found that in a joint employing an inner collar having such a structure, the pressing member has a pulling-out preventing force of about 1.5 to 2 times that of a joint using only a ball. The concave portion 26 of the inner collar 8 may have a complete slit shape without the thin film portion 27, but has a shape in which the thin film portion 27 is left so that the inner collar 8 is not deformed before the tube 40 is inserted. Are preferred.
[0023]
【The invention's effect】
The present invention adopts the above-mentioned structure, so that it can be freely connected and detached even with a pipe having a high hardness, and it can be easily attached and detached especially in a narrow space. The industrial effects are extremely large.
[Brief description of the drawings]
FIG. 1 is a half sectional view showing a first embodiment of a pipe joint according to the present invention.
FIG. 2 is a side view of the pipe joint of FIG.
FIG. 3 is a partial sectional view showing a second embodiment of the pipe joint of the present invention.
FIG. 4 is a partial sectional view showing a third embodiment of the pipe joint of the present invention.
FIG. 5 is a partially cutaway sectional view showing the relationship between the inner collar and the ball.
FIG. 6 is a cutaway partial sectional view showing another example of the relationship between the inner color and the ball.
FIG. 7 is a partial cross-sectional view showing another relationship between an inner color and an outer color.
FIG. 8 is a partial sectional view showing a use state of the inner collar and the ball.
FIG. 9 is a partial sectional view showing a use state of the inner collar and the ball when an excessive pressure is applied.
FIG. 10 is a front view of an inner collar particularly effectively used in the present invention.
FIG. 11 is a cross-sectional view taken along line AA of the inner color shown in FIG.
FIG. 12 is a front view showing a use state of the inner collar shown in FIG. 10;
FIG. 13 is a sectional view taken along the line AA of the use state of the inner collar shown in FIG. 10;
FIG. 14 is a half cut sectional view showing an example of a conventional pipe joint.
FIG. 15 is a sectional view of a pipe joint already proposed by the present applicant.
[Explanation of symbols]
1) Female body forming the base of pipe joint,
2 ‥‥ step of flow path,
3 ‥‥ Large diameter part of flow path,
4 ‥‥ small diameter part of flow path,
5 mm circumferential groove on the inner surface of the large diameter portion 3,
6 ‥‥ O-ring,
7 ‥‥ coil spring,
8 ‥‥ color,
8 0先端 Tip of the inner color,
9, 18 ‥‥ hard ball,
10mm outside color,
10 0先端 Inner end of outer collar (caulking part),
10 1先端 Tip of outer color,
11 ‥‥ Taper part of outer color,
12, 20 ‥‥ Large diameter peripheral groove,
13, 21 ‥‥ Outer collar circumferential groove,
14, 22 ‥‥ retaining ring,
15 ‥‥ A circumferential groove on the outer peripheral surface of the large diameter portion,
16mm hole formed in outer collar,
A circumferential groove connected to the 17 ‥‥ hole 16;
19 ‥‥ Circumference on the surface of the large diameter part,
23mm storage hole for the ball on the outer periphery of the inner color,
24 ‥‥ driver,
25mm hole in the outer color,
26 ‥‥ Depression on the outer surface side of the inner color,
27mm thin part of the inner color,
40 ‥‥ tube,
A ‥‥ Small diameter part on the outer surface of female body.

Claims (1)

管継手の基体となる雌体の流路の深部に挿入される管体の先端が当る段部を形成し、深部側より弾性体及び押圧部材を支持した内カラ−が順に配置され、かつ雌体からのびる外カラ−にてこれらを覆いかつ外カラ−先端に深部側が大径となるテ−パ−部を形成してなる管継手であって、当該外カラ−は前記雌体とは別体に構成され、当該外カラ−にて覆われる雌体の外表面の先端を小径となし、外カラ−を周方向に偏心回転可能に係合したことを特徴とする管継手。A step is formed where the tip of the pipe inserted into the deep part of the flow path of the female body serving as the base of the pipe joint is formed, and an inner collar supporting the elastic body and the pressing member is arranged in order from the deep side, and A pipe joint comprising an outer collar extending from the body and covering the outer collar with a tapered portion having a large diameter on the deep side at the tip of the outer collar, wherein the outer collar is separate from the female body. A pipe joint comprising a body, wherein the outer surface of the female body covered by the outer collar has a small-diameter end, and the outer collar is engaged eccentrically rotatable in a circumferential direction.
JP18488695A 1993-03-19 1995-06-28 Pipe fittings Expired - Fee Related JP3562876B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP18488695A JP3562876B2 (en) 1995-06-28 1995-06-28 Pipe fittings
US08/529,126 US5653480A (en) 1993-03-19 1995-09-15 Pipe coupling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18488695A JP3562876B2 (en) 1995-06-28 1995-06-28 Pipe fittings

Publications (2)

Publication Number Publication Date
JPH0914555A JPH0914555A (en) 1997-01-17
JP3562876B2 true JP3562876B2 (en) 2004-09-08

Family

ID=16161042

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18488695A Expired - Fee Related JP3562876B2 (en) 1993-03-19 1995-06-28 Pipe fittings

Country Status (1)

Country Link
JP (1) JP3562876B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6280306B2 (en) * 2013-03-04 2018-02-14 株式会社ブリヂストン Pipe fitting
EP3286476B1 (en) * 2015-04-23 2019-10-02 Swagelok Company Push to connect fitting assembly for a conduit
JP6894214B2 (en) * 2016-11-10 2021-06-30 日東工器株式会社 Sockets and fittings consisting of sockets and plugs

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