JPS5817188Y2 - Disengagement prevention pipe fitting - Google Patents

Description

【考案の詳細な説明】 本考案は、スリップ−オン−タイプの管継手において離
脱防止を図った離脱防止管継手に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slip-on type pipe fitting that prevents separation.

１つの管の受口内周面に形成された環状凹部にリング状
のシール用バッキングを装着し、この受口内に他の管の
挿口を差し込むことによって管を接続するようにしたス
リップ−オン−タイプの管継手は、構造が簡単でかつ伸
縮並びに可撓性を有しながらセルフシール機能による高
いシール性能を持つという優れた特長を有している。A slip-on system in which a ring-shaped sealing backing is attached to an annular recess formed on the inner peripheral surface of the socket of one pipe, and the pipes are connected by inserting the socket of the other pipe into this socket. This type of pipe joint has the excellent features of having a simple structure, being expandable and flexible, and having high sealing performance due to its self-sealing function.

しかし、このスリップ−オン−タイプの管継手を油管路
部に適用した場合、管内流体が油管路部で管壁に衝突す
ることによって抜は出し力が作用する。However, when this slip-on type pipe joint is applied to an oil pipe section, the fluid in the pipe collides with the pipe wall in the oil pipe section, thereby exerting a pulling force.

これに対処するために従来は油管路部を大きなコンクリ
ートブロックで覆い、その重量によって抜は出し力に対
抗する方策がとられていたが、配管施工に手間を要しか
つ費用も高くつく欠点があった。In order to deal with this, the conventional method was to cover the oil pipe with a large concrete block and use its weight to counter the extraction force, but this method had the disadvantage of requiring time and effort to construct the pipe and being expensive. there were.

特に、中・大口径管にこの種管継手を適用した場合には
その欠点は重大かつ決定的な意味をもってくる。In particular, when this type of pipe joint is applied to medium- to large-diameter pipes, its drawbacks have a serious and decisive meaning.

また、管継手自体に抜は出し防止機能を有せしめるため
に、色々な抜は出し阻止手段を付加した管継手も各種提
案されているが、何れも構造並びに施工が複雑になって
高価につきスノツプーオンータイプ管継手の特長を殆ん
ど無くしてしまうものであったり、また大きな抜は出し
力が作用した場合やさらに撓みが付加された場合などに
おいて阻止力が十分に得られなかったり、作用に十分な
信頼性が得られない等の何らかの問題を有しており、特
に管内径が６００ｍｍ以上の中・大口径管に適用しても
上記諸問題に対して一応の満足が得られるというものは
無かった。In addition, in order to provide the pipe fitting itself with a pull-out prevention function, various types of pipe fittings with various pull-out prevention means have been proposed, but all of them are complicated in structure and construction, expensive, and expensive. Most of the features of the two-pu-on type pipe fittings are lost, and sufficient stopping force may not be obtained when a large pulling force is applied or when additional deflection is applied. However, even when applied to medium and large diameter pipes with an inner diameter of 600 mm or more, the above-mentioned problems can be temporarily satisfied. There was no such thing.

なお、抜は出し阻止機能は、曲管踏部に要求されるだけ
でなく、軟弱地盤における埋設配管においても、地盤の
不等沈下によって管継手に抜は出し力が作用するために
必要である。The pull-out prevention function is not only required for curved pipe treads, but also for buried pipes in soft ground, as pull-out forces act on pipe joints due to uneven subsidence of the ground. .

本考案の主たる目的は、中・大口径のスリップ−オン−
タイプの管継手において、大きな抜は出し力が作用した
りさらに撓みが加わった場合にも受口挿口間の離脱を確
実に阻止することのできる信頼性の高い管継手を提供す
ることにあり、さらにはその様な管継手の接合に際して
現場作業の極めて簡単なものを提供することを目的とす
る。The main purpose of this invention is to use medium- to large-diameter slip-on
Our objective is to provide a highly reliable pipe joint that can reliably prevent separation between the socket and socket even when a large pull-out force is applied or bending is applied. Furthermore, it is an object of the present invention to provide extremely simple on-site work when joining such pipe joints.

本考案の離脱防止管継手は、スリップ−オン−タイプの
管継手において、受口の前記バッキング座面の奥側に第
２突出部を形成すると共に、該第２突出部の奥側に広巾
の第２環状凹部を形成し、挿口の先端外周に環状溝を形
成すると共に、前記第２突出部に対して管軸方向に保合
可能でかつ前記第２環状四部底面と挿口外周との間の間
隙を通過可能な円環状の１つ割のロックリングを前記環
状溝に嵌着し、該１つ割口ツクリングの周遊端部の挿口
先端側の側面に接当しかつ係合具にて該周遊端部に係合
固定される結合ピースを設け、該結合ピースは前記保合
具をそれぞれ有する２つの部分とそれらを互いに連結す
る結合ピース長さ調整具とから成り、前記第２突出部と
前記ロックリングの間に受口と挿口と相対移動を許す距
離を有せしめるとともに、前記第２環状凹部の奥端段面
と挿口先端の間に空間を有せしめたものであり、これに
より１つ割口ツクリングを受口の奥部の奥端段面に対向
する空間に挿入配置し、ついで受口に挿入した挿口をそ
の先端を前記受口奥部に配置した１つ割口ツクリング手
前で停め、その後管内面からロックリングの挿口先端環
状溝への装着を行なうだけで簡単に管の接合を完了する
ことができ、しかも挿口の抜は出しは１つ割ロックリン
グ両遊端部に係合固定される結合ピースにより確実に阻
止できる効果を有する。The detachment prevention pipe joint of the present invention is a slip-on type pipe joint in which a second protrusion is formed on the back side of the backing seat surface of the socket, and a wide width is formed on the back side of the second protrusion. A second annular recess is formed, and an annular groove is formed on the outer periphery of the tip of the insertion port, and the second annular four-part bottom surface and the outer periphery of the insertion port are capable of being secured to the second protrusion in the tube axis direction. An annular split lock ring that can pass through the gap therebetween is fitted into the annular groove, and is in contact with the side surface of the circumferential end of the split lock ring on the side of the insertion opening tip, and is an engaging tool. A connecting piece is provided which is engaged and fixed to the circumferential end portion at the second portion, and the connecting piece is composed of two parts each having the retaining device and a connecting piece length adjusting device that connects them to each other. A distance is provided between the protrusion and the lock ring to allow relative movement between the socket and the socket, and a space is provided between the inner step surface of the second annular recess and the tip of the socket. As a result, one split spout ring is inserted and arranged in the space opposite to the step surface at the back end of the socket, and then the socket inserted into the socket is placed with its tip at the back of the socket. You can easily complete the pipe connection by simply stopping in front of the split lock ring and then attaching the lock ring to the annular groove at the tip of the insert from the inside of the tube.Moreover, only one split lock allows you to remove the insert. This has the effect of being able to be reliably blocked by the coupling piece that is engaged and fixed to both free ends of the ring.

以下、本考案の一実施例を図面に基づいて説明する。Hereinafter, one embodiment of the present invention will be described based on the drawings.

一般に、スリップ−オン−タイプの管継手は、第１図に
示す様に、受口１、挿口２およびリング状のバッキング
３から構成されている。Generally, a slip-on type pipe joint is composed of a socket 1, a socket 2, and a ring-shaped backing 3, as shown in FIG.

受口１の開口端部内周には、挿口２の挿入を容易に許す
程度の間隙をあけて挿口外周に遊嵌する様に突出部４が
突設されている。A protruding portion 4 is provided on the inner periphery of the open end of the receptacle 1 so as to fit loosely around the outer periphery of the receptacle with a gap that allows the insertion of the receptacle 2 easily.

該突出部の奥側には環状の凹部が形成されてその局面が
バッキング座面５となっており、このバッキング座面５
と前記挿口２外周面との間にバッキング３を圧し潰し状
態で介在させることのできるバッキング収納用環状空間
６が形成されている。An annular recess is formed on the back side of the protrusion, and its curved surface serves as a backing seat surface 5.
A backing storage annular space 6 is formed between the backing 3 and the outer peripheral surface of the insertion port 2, in which the backing 3 can be inserted in a crushed state.

前記突出部４と前記バッキング座面５との間には、係合
溝７が形成されている。An engagement groove 7 is formed between the protrusion 4 and the backing seat surface 5.

図示例では、この係合溝７は、その底面の径が前記バッ
キング座面の径よりも大きい環状溝から戒っているが、
バッキング座面の受口開口側端部に突設した環状突条に
よって係合溝７を形成しても良い。In the illustrated example, the engagement groove 7 is formed from an annular groove whose bottom diameter is larger than the diameter of the backing seat.
The engagement groove 7 may be formed by an annular protrusion protruding from the end of the backing seat on the side of the socket opening.

一方、前記バッキング３は前記保合溝７内に嵌入係合す
る嵌合部８を形成されたバックアップ部９と、前記環状
空間６に圧し潰し状態で圧嵌されることによりその復元
力でシール面圧を生じさせるシール部１０とを一体結合
して成る。On the other hand, the backing 3 is press-fitted into the annular space 6 with a backup part 9 formed with a fitting part 8 that fits into the fitting groove 7 and is sealed by its restoring force. It is formed by integrally joining a seal portion 10 that generates surface pressure.

このバッキング３の内周面は、シール部１０の圧し潰し
代を形成することも兼ねて前記バックアップ部９の端縁
からシール部１０にかけて漸次径小となるテーパ面に形
成してあり、さらに前記挿口２の先端外周面も先細りテ
ーパ面１１に形成することにより、バッキング３を装着
した受口１内に挿口２をシール部１０を圧し潰しつつス
ムーズに挿入できる様にしている。The inner circumferential surface of the backing 3 is formed into a tapered surface whose diameter gradually decreases from the edge of the backup portion 9 to the seal portion 10 to also form a crushing margin for the seal portion 10. The outer circumferential surface of the tip end of the socket 2 is also formed into a tapered surface 11, so that the socket 2 can be smoothly inserted into the socket 1 fitted with the backing 3 while crushing the seal part 10.

接合に際しては、バッキング３を変形させて受口開口端
の突出部４内を通過させて受口１内の環状凹部内に収納
し、上述した如くその嵌合部８を係合溝７内に嵌入係合
させると共にそのシール部１０の外周面をバッキング座
面５に面接させた状態にセットする。When joining, the backing 3 is deformed and passed through the protrusion 4 at the opening end of the socket, stored in the annular recess in the socket 1, and the fitting part 8 is inserted into the engagement groove 7 as described above. The seal portion 10 is fitted and engaged, and the outer circumferential surface of the seal portion 10 is set to face the backing seat surface 5.

次いで上述の如く挿口２を受口１内にバッキング３のシ
ール部を圧し潰しつつ挿入することにより受口１と挿口
２が接合される。Next, as described above, the socket 1 and the socket 2 are joined by inserting the socket 2 into the socket 1 while crushing the seal portion of the backing 3.

この挿口２挿入時にバッキング３に加わる管軸方向の力
に対抗してバッキング３を所定位置に保持し、挿口２に
引きづられて移動するのを防止する役割を嵌合部８と係
合溝７との係合が果す。The role of the engagement with the fitting part 8 is to hold the backing 3 in a predetermined position against the force in the tube axis direction applied to the backing 3 when inserting the socket 2, and to prevent it from moving due to being dragged by the socket 2. This is accomplished by engagement with the matching groove 7.

なお、中・大口径管においては前記挿口２挿入時に、嵌
合部８と係合溝７との係合にかかわらずパツキング３が
引きづられて確実な接合を行ない得ない事がある。In addition, in the case of a medium or large-diameter pipe, when the insertion port 2 is inserted, the packing 3 may be dragged regardless of the engagement between the fitting portion 8 and the engagement groove 7, and a reliable connection may not be possible.

そのため、バッキング座面５の内径をバッキングシール
部１０の外径よりも小さく、望ましくは１〜６％小さく
シ、保合溝７の深さを嵌合部８の高さと同じかそれより
も大きくし、さらにバッキング３の内周面の最大径端縁
、すなわち受口開口側の端縁の内周径を突出部４の内周
径よりも大きくしである。Therefore, the inner diameter of the backing seat surface 5 should be smaller than the outer diameter of the backing seal part 10, preferably 1 to 6% smaller, and the depth of the retaining groove 7 should be the same as or larger than the height of the fitting part 8. Furthermore, the maximum diameter edge of the inner circumferential surface of the backing 3, that is, the inner circumferential diameter of the edge on the socket opening side is made larger than the inner circumferential diameter of the protrusion 4.

こうすることによって、バッキング３は受口１への装着
状態で円周方向に圧縮され、それに応じてバッキング座
面５に対する径方向の圧着力が生じ、また嵌合部８が係
合溝７内に完全に入り切らないためにシール部１０がバ
ッキング座面５から浮き上がって前記圧着力が減殺され
るという様なこともなく、さらにバッキング３のバック
アップ部９の受口開口側端縁が挿口２外周面に引掛って
バッキング３が引きづられるということもないので、中
・大口径管の場合にも確実かつスムーズに接合できる。By doing this, the backing 3 is compressed in the circumferential direction when it is attached to the socket 1, a radial pressure force is generated on the backing seat surface 5, and the fitting part 8 is compressed in the engagement groove 7. Since the seal portion 10 does not fully enter the backing seat surface 5, the pressure bonding force will not be reduced, and the edge of the backup portion 9 of the backing 3 on the socket opening side will not fit into the socket. Since the backing 3 does not get caught on the outer circumferential surface of the backing 3 and is dragged, even medium and large diameter pipes can be joined reliably and smoothly.

かかる構成の管継手において、受口１と挿口２の相対的
な抜は出しを防止するために、受口１の前記バッキング
座面５の奥側、すなわちゴムバッキング３の配置位置よ
りも奥の受口内周面に受口の軸心に向かって突出する第
２の突出部１２が形成されている。In a pipe joint having such a configuration, in order to prevent the socket 1 and the insertion port 2 from being pulled out relative to each other, the backing surface 5 of the socket 1 is placed on the back side, that is, deeper than the position where the rubber backing 3 is arranged. A second protrusion 12 is formed on the inner circumferential surface of the socket and projects toward the axis of the socket.

この第２突出部１２の内径は前記突出部４の内径よりも
大きくして挿口２が受口１に対しである程度撓むのを許
している。The inner diameter of the second protrusion 12 is larger than the inner diameter of the protrusion 4 to allow the socket 2 to flex to some extent with respect to the socket 1.

この第２突出部１２の奥側は再び広巾の第２環状凹部１
３が形成されており、１４はこの凹部１３の奥端の半径
方向の段面である。The back side of this second protrusion 12 is again a wide second annular recess 1.
3 is formed, and 14 is a stepped surface in the radial direction at the inner end of this recess 13.

一方挿口２の先端近傍の外周面には比較的浅い環状溝１
５が形成され、該溝１５に円環状で周方向に１個所切断
した１つ割口ツクリング１６がそれ自身が有している縮
径付勢力によって装着されている。On the other hand, a relatively shallow annular groove 1 is formed on the outer peripheral surface near the tip of the insertion port 2.
5 is formed in the groove 15, and a one-split ring 16 having an annular shape and cut at one point in the circumferential direction is attached to the groove 15 by its own biasing force for diameter reduction.

すなわち、この１つ割ロツクノング１６の自然状態の内
径は、溝１５の底面径よりも小径に形成してあり、装着
時に拡径することにより縮径付勢力が生じる。That is, the inner diameter of the split locking tongue 16 in its natural state is smaller than the diameter of the bottom surface of the groove 15, and when it is expanded during installation, a force for reducing the diameter is generated.

この１つ割口ツクリング１６は通常ダクタイル鋳鉄、鋼
等から戊る。This single-split ring 16 is usually made of ductile cast iron, steel, or the like.

またこの１つ割口ツクリング１６は、環状溝１５内への
嵌着状態において、その両道端部１６ ａ 、１６ ｂ
が結合ピース１７によって互いに結合されている。In addition, when the single split ring 16 is fitted into the annular groove 15, its two end portions 16 a and 16 b
are connected to each other by a connecting piece 17.

前記結合ピース１７は、第２図、第３図に示す様に、長
手方向すなわち１つ割口ツクリングの周方向に２分割さ
れた２つの部分１８ ａ 、１８ ｂから威り、これら
２つの部分が結合ピース１７の長さ調整具であるねじ棒
１９を介して互いに連結されている。As shown in FIGS. 2 and 3, the connecting piece 17 extends from two parts 18 a and 18 b that are divided into two in the longitudinal direction, that is, in the circumferential direction of the one-split ring, and these two parts are connected to each other via a threaded rod 19 which is a length adjuster of the connecting piece 17.

前記２つの部分１８ ａ 、１８ ｂは、各々が１つ割
口ツクリング１６の各遊端部１６ ａ 、１６ ｂに係
合連結されるという意味で、以下連結片と呼ぶことにす
る。The two portions 18 a , 18 b will hereinafter be referred to as connecting pieces in the sense that they are each engagedly connected to the respective free ends 16 a , 16 b of the split-socket ring 16 .

各連結片１８ ａ 、１８ ｂは、１つ割口ツクリング
遊端部１６ａ、１６ｂの先端面に接しかつ前記ねし棒１
９螺合用ねじ孔２０を有する基部２１と、前記先端面に
隣り合う挿口先端側の側面に接する突出片２２とから戊
るＬ字状に形成され、前記突出片２２は、前記側面と接
する方の表面から垂直に突出する保合ピン２３を有して
いる。Each of the connecting pieces 18 a and 18 b is in contact with the distal end surface of the split ring free end portions 16 a and 16 b, and is connected to the threaded rod 1 .
9. It is formed in an L-shape formed by a base 21 having a screw hole 20 for screwing, and a protruding piece 22 that is in contact with a side surface on the tip end side of the socket adjacent to the tip surface, and the protruding piece 22 is in contact with the side surface. It has a retaining pin 23 that projects perpendicularly from one surface.

そして前記係合ピン２３が前記１つ割口ツクリング遊端
部１６ ａ 、１６ ｂに穿設した管軸方向の係合孔２
４に嵌入保合することにより、１つ割口ツクリング遊端
部１６ ａ 、１６ ｂに各連結片１８ａ、１８ｂが連
結固定される。The engagement pin 23 connects to the engagement hole 2 in the tube axis direction formed in the free end portions 16 a and 16 b of the single split ring.
4, the respective connecting pieces 18a and 18b are connected and fixed to the free end portions 16a and 16b of the split ring.

この状態において、１つ割口ツクリング１６の挿口先端
から遠い方の側面２５と第２突出部１２の受口奥側の側
面２６とは互いに対向しており、その間に受口１と挿口
２との相対移動を許す距離が有せしめられている。In this state, the side surface 25 of the single-split pick ring 16 that is far from the tip of the socket and the side surface 26 of the second protrusion 12 on the back side of the socket face each other, and between them, the socket 1 and the socket A distance is provided to allow relative movement with respect to 2.

なお、前記ねじ棒１９は、図示例では全長にわたって同
一のねじが螺設されているが、必要に応じて中央部を挾
んで左右を互いに逆方向にねじれるねじを螺設すること
により、ねじピッチ以下の微調整も可能となる。In the illustrated example, the threaded rod 19 is threaded with the same thread over its entire length, but if necessary, the thread pitch can be adjusted by inserting threads that twist in opposite directions on the left and right sides of the center part. The following fine adjustments are also possible.

また、前記係合ピン２３は連結片１８ａ、１８ｂに一体
的に形成されていなくても良く、さらには１つ割口ツク
リングと連結片との結合時に打ち込む様にしても良い。Further, the engagement pin 23 does not need to be formed integrally with the connecting pieces 18a, 18b, and may be driven into one when the split ring and the connecting piece are connected.

なお本考案では結合ピース１７を用いるので、前記１つ
割口ツクリング１６は、自然状態の内径が環状溝１５の
底面径より小さくないものでも差し支えない。In addition, since the coupling piece 17 is used in the present invention, the single-split coupling ring 16 may have an inner diameter in its natural state that is not smaller than the bottom diameter of the annular groove 15.

前記１つ割口ツクリング１６の挿口２への装着は次の様
にして行われる。Attaching the single-split snap ring 16 to the socket 2 is performed in the following manner.

すなわち、前述の接合に先立って、挿口２の環状溝１５
に１つ割口ツクリング１６を嵌着し、その遊端部１６
ａ 、１６ ｂの先端面間に各連結片１８ａ、１８ｂの
基部２１が丁度嵌まり込む様にねじ棒１９を利用して接
合ピース１７の長さ調整を行う。That is, prior to the above-mentioned joining, the annular groove 15 of the insertion port 2 is
Fit one split ring 16 to the free end 16
The length of the connecting piece 17 is adjusted using the threaded rod 19 so that the base 21 of each connecting piece 18a, 18b just fits between the tip surfaces of the connecting pieces 18a, 16b.

具体的には何れか一方又は両方の連結片１８ ａ 、１
８ ｂをねじ棒１９に対して１回転車位で回転させるか
、あるいはねじ棒１９が左右で逆ねじの場合は、このね
じ棒を両連結片１８ ａ 、１８ ｂに対して適宜回転
させる。Specifically, either one or both of the connecting pieces 18a, 1
8b is rotated one rotation with respect to the threaded rod 19, or if the threaded rod 19 has opposite threads on the left and right sides, the threaded rod is appropriately rotated with respect to both connecting pieces 18a and 18b.

調整がうまく行けば、両連結片の基部２１を１つ割口ツ
クリング遊端部１６ａ、１６ｂ間に装入することにより
係合ピン２３も係合孔２４内に嵌入し、１つ割口ツクリ
ング１６と各連結片１８ａ、１８ｂ（すなわち結合ピー
ス１７）とを互いに連結することができる。If the adjustment goes well, the engagement pin 23 will also fit into the engagement hole 24 by inserting one of the bases 21 of both connecting pieces between the free ends 16a and 16b of the splitting ring. 16 and each connecting piece 18a, 18b (ie, connecting piece 17) can be connected to each other.

次に挿口２から１つ割口ツクリング１６を外すと共に、
今度は受口１の奥部の奥端段面１４に対向する空間に挿
入し、次いで適宜拡径治具を用いたり、あるいは適宜手
段で拡径した状態で両道端間にディスタンスピースを介
在させたりして、第１図に仮想線で示す様に、挿口２外
周径よりもその内径が大なる状態に拡径して受口１奥端
に配置しておく。Next, remove one splitting ring 16 from the insertion slot 2, and
This time, it is inserted into the space facing the back end stepped surface 14 at the back of the socket 1, and then a distance piece is interposed between both ends with the diameter expanded using an appropriate diameter expanding jig or by an appropriate means. As shown by the imaginary line in FIG. 1, the inner diameter of the socket 2 is enlarged to be larger than the outer diameter of the socket 1, and the socket 1 is placed at the rear end.

そして、上述の如くバッキング３を装着すると共に挿口
２を挿入した後、管内に人が入って前記１つ割口ツクリ
ング１６を挿口２先端外周面に外嵌させると共に前記拡
径治具又はディスタンスピースを取外し、１つ割口ツク
リングを環状溝１５に向けて押し込む。After attaching the backing 3 and inserting the insertion port 2 as described above, a person enters the pipe and fits the one-split snap ring 16 onto the outer peripheral surface of the tip of the insertion port 2, and also uses the diameter expanding jig or Remove the distance piece and push the single split ring toward the annular groove 15.

すると１つ割口ツクリング１６は縮径付勢力を有してい
るので１然に環状溝１５内に嵌入して止まる。Then, since the single split ring 16 has a biasing force for diameter reduction, it instantly fits into the annular groove 15 and stops.

その後、上記の如く調整済みの結合ピース１７を１つ割
口ツクリングの遊端部１６ ａ 、１６ ｂ間に装着す
れば、管内面からのロックリングの装着が容易に行なわ
れ、簡単な接合が完了する。Thereafter, by attaching one coupling piece 17 adjusted as described above between the free ends 16 a and 16 b of the split lock ring, the lock ring can be easily attached from the inner surface of the tube, and a simple connection can be achieved. Complete.

一方、１つ割口ツクリング１６の内径が環状溝１５の底
面径より大きい場合は、接合に先立って、環状溝１５に
１つ割口ツクリング１６を装着し、適宜締付治具で縮径
させて環状溝に嵌入させた状態で上記の如く結合ピース
の設定を行なっておき、接合時には１つ割口ツクリング
１６を受口１内へ預けておいて、挿口２挿人後、適宜締
付治具を用いて環状溝１５内に１つ割口ツクリング１６
を嵌入させた状態で結合ピース１７をセットし、その後
前記締付治具を取外せは゛良い。On the other hand, if the inner diameter of the single split ring 16 is larger than the bottom diameter of the annular groove 15, attach the single split ring 16 to the annular groove 15 prior to joining, and reduce the diameter with a tightening jig as appropriate. Set the connecting piece as described above with the connecting piece inserted into the annular groove, and when joining, leave one split-mouth fitting ring 16 in the socket 1, and after inserting the opening 2, tighten it appropriately. Use a jig to create one split ring 16 in the annular groove 15.
It is preferable to set the coupling piece 17 in a state where it is fitted, and then remove the tightening jig.

なお、挿口２挿入時にその環状溝１５の側面がバッキン
グ３のシール部１０に引掛かってこのシール部１０を傷
めない様に、環状溝１５の挿口２先端から遠い方の側面
１５ ａをテーパ面に形成してあり、その傾斜角は挿口
先端のテーパ面１１とほぼ同じである。In order to prevent the side surface of the annular groove 15 from getting caught on the seal part 10 of the backing 3 and damaging the seal part 10 when the socket 2 is inserted, the side surface 15a of the annular groove 15 that is far from the tip of the socket 2 is tapered. The inclination angle is approximately the same as the tapered surface 11 at the tip of the socket.

第１図に示す接合状態において、バッキング３のシール
部１０の圧し潰し状態からの復元力によって、バッキン
グ３とバッキング座面５との間およびバッキング３と挿
口２外周面との間にシールに必要な面圧が作用し、さら
に管内に流体圧が負荷されると、その流体圧によってシ
ール部１０が圧縮されるため流体圧に等価の面圧が前記
シール部の復元力による面圧に加えられ、その総面圧が
シール面に働くことになる。In the joined state shown in FIG. 1, the restoring force of the seal portion 10 of the backing 3 from the crushed state creates a seal between the backing 3 and the backing seat surface 5 and between the backing 3 and the outer peripheral surface of the socket 2. When the necessary surface pressure is applied and fluid pressure is further applied inside the pipe, the seal portion 10 is compressed by the fluid pressure, so that a surface pressure equivalent to the fluid pressure is added to the surface pressure due to the restoring force of the seal portion. The total surface pressure acts on the sealing surface.

従って、常に流体圧力以上の面圧が、外部からバッキン
グを流体圧に抗して押圧することなく自動的に得られ、
このセルフシール効果によって常に確実に水密あるいは
気密が保たれる。Therefore, a surface pressure that is always higher than the fluid pressure can be automatically obtained without pressing the backing from the outside against the fluid pressure.
This self-sealing effect ensures that watertightness or airtightness is always maintained.

一方、管内流体圧によってバッキング３のシール部１０
が変形して受口１と挿口２間の間隙から抜は出すのを阻
止するのはバッキング３自身のバックアップ部９で行わ
れる。On the other hand, the seal portion 10 of the backing 3 is
The backing part 9 of the backing 3 itself prevents the backing 3 from being deformed and pulled out from the gap between the socket 1 and the socket 2.

バッキング３全体の管内流気圧による抜は出し阻止は受
口１の突出部４で行なわれる。The protrusion 4 of the socket 1 prevents the entire backing 3 from being pulled out due to the internal flow pressure.

受口１と挿口２との間に一定以上の抜は出し力が作用し
た場合、挿口２は受口１から抜は出すが、１つ割口ツク
リング１６の挿口先端から遠い方の側面２５と第２突出
部１２の受口奥側の側面２６とが互いに係合することに
より、抜は出してしまうことは阻止される。When a certain amount of ejecting force is applied between the socket 1 and the socket 2, the socket 2 will eject the ejector from the socket 1, but the one farthest from the socket tip of the split-socket ring 16 will be removed. When the side surface 25 and the side surface 26 of the second protruding part 12 on the back side of the socket engage with each other, it is prevented from being pulled out.

その際、受口１の第２突出部１２で受けられた抜は出し
力の反力は、保合面２６゜２５を介して１つ割口ツクリ
ング１６に伝達され、同時にこの１つ割口ツクリング１
６の挿口先端側の側面２７と環状溝１５の挿口先端側の
側面との係合を介して挿口２に伝達される。At this time, the reaction force of the pulling force received by the second protruding portion 12 of the socket 1 is transmitted to the one splitting hole pulling ring 16 via the retaining surface 26° 25, and at the same time, this one splitting Tsukring 1
It is transmitted to the socket 2 through the engagement between the side surface 27 of the socket 6 on the socket tip side and the side surface of the annular groove 15 on the socket top side.

ところで、この１つ割口ツクリング１６から挿口２への
力の伝達において、周方向に完全に均一に力が伝わるの
であれば、環状溝１５に１つ割口ツクリング１６を嵌着
しただけでも１つ割口ツクリングが環状溝から外れるこ
とはないが、実際にはばらつきがあるため大きな力が作
用した場合には、また受口と挿口が互いに撓んだ場合に
は、１つ割口ツクリング１６に周方向にかたよった力が
作用するために１つ割口ツクリングが比較的簡単に変形
して環状溝１５から外れてしまう惧れがあり、抜は出し
防止機能に信頼性がない。By the way, in the transmission of the force from the single split ring 16 to the socket 2, if the force is transmitted completely uniformly in the circumferential direction, even if only one split ring 16 is fitted in the annular groove 15, The single split spout ring will not come off from the annular groove, but since there are variations in reality, if a large force is applied, or if the socket and socket bend together, the single split spout ring will not come off the annular groove. Since a biased force is applied to the pull ring 16 in the circumferential direction, there is a risk that the single-split pull ring may be relatively easily deformed and come off from the annular groove 15, and the pull-out prevention function is unreliable.

しかし、上記の如く１つ割口ツクリングの両遊端部１６
ａ 、１６ ｂを結合ピース１７によって連結固定す
ることによって、両遊端部１６ａ。However, as mentioned above, both free ends 16 of the single split ring
a, 16b are connected and fixed by a connecting piece 17, thereby forming both free ends 16a.

１６ ｂの周方向の相対移動が阻止され、その結果１つ
割口ツクリング１６の環状溝１５への嵌着状態が強制的
に維持されるため、信頼性の高い抜は出し防止機能が得
られる。16b is prevented from moving relative to the circumferential direction, and as a result, the single split ring 16 is forcibly maintained in its fitted state in the annular groove 15, so a highly reliable pull-out prevention function is obtained. .

なお、１つ割口ツクリングが環状溝から外れるのを防止
するためには、この１つ割口ツクリングを挿口にボルト
止めする方法も考えられるが、その様な構成に比べても
、挿口に環状溝以外にボルト穴等の加工を必要とせず、
管の加工が少なくて済むと共にボルト穴による環状溝部
の強度低下もない。In addition, in order to prevent the single-split snap ring from coming off the annular groove, it is conceivable to bolt the single-split snap ring to the socket, but compared to such a configuration, the socket No machining such as bolt holes is required other than the annular groove.
Less machining of the pipe is required, and there is no reduction in the strength of the annular groove due to the bolt holes.

さらに、接合現場におけるロックリング装着のための作
業としては、調整具であるねし棒を利用して結合ピース
の長さ調整を行い、管内ではこの調整された結合ピース
を１つ割ロックリング両遊端部間に装着するだけで良い
ので、作業のしにくい現場での接合作業が容易である。Furthermore, in order to attach the lock ring at the joining site, the length of the joint piece is adjusted using a tension rod, which is an adjustment tool. Since it is only necessary to attach it between the free ends, it is easy to perform joining work on-site, which is difficult to do.

本考案離脱防止管継手は、以上の実施例に示した様に実
施し得るものであって、これによれば、スリップ−オン
−タイプの管継手において、受口の第２突出部と該第２
突出部の奥側の広巾の第２環状凹部内において挿口先端
部の環状溝に嵌着した１つ割口ツクリングとの係合によ
り受口と挿口の間の軸心方向の相対移動を許しながらそ
れらの離脱を防止でき、かつ１つ割口ツクリングの両道
端部を結合ピースで連結固定しているので１つ割口ツク
リングが環状溝から外れる慣れがなく、信頼性の高い離
脱防止機能が得られ、さらに前記結合ピースの長さ調整
並びに装着が非常に容易で、現場での接合作業が容易で
ある。The detachment prevention pipe joint of the present invention can be implemented as shown in the above embodiments, and according to this, in a slip-on type pipe joint, the second protrusion of the socket and the second 2
Relative movement in the axial direction between the receptacle and the receptacle is achieved by engagement with a single split ring fitted in the annular groove at the tip of the receptacle in the wide second annular recess on the back side of the protrusion. It is possible to prevent them from coming off while still allowing them to separate, and since both ends of the single split-mouth ring are connected and fixed with a connecting piece, there is no chance of the single split-mouth ring coming off from the annular groove, resulting in a highly reliable separation prevention function. Furthermore, the length adjustment and attachment of the joining piece are very easy, and the joining work on site is easy.

しかも、管の接合は、先づ１つ割口ツクリングを受口の
奥部の奥端段面に対向する空間に挿入配置し、ついで受
口に挿入した挿口をその先端を前記受口奥部に配置した
１つ割口ツクリング手前で停め、その後管内面からロッ
クリングの挿口先端環状溝への装着を行なうだけでよい
ので、ロックリングの挿口への装着は容易であるととも
に、管接合を簡単に完了することができる大きな利点を
有する。Moreover, to join the pipes, first insert the split spout ring one by one into the space facing the step surface at the back end of the socket, and then insert the socket inserted into the socket so that its tip is at the back of the socket. It is easy to attach the lock ring to the socket, as all you need to do is to stop it in front of the one split ring located in the pipe, and then attach it from the inside of the tube to the annular groove at the tip of the lock ring. It has the great advantage that joining can be completed easily.

【図面の簡単な説明】 図面は本考案の一実施例を示し、第１図は縦断面図、第
２図は１つ割口ツクリングの遊端部の連結固定状態を示
す横断平面図、第３図は第２図のｌｌｌ−ＩＩＩ矢視図
である。 １・・・・・・取口、２・・・・・・挿口、３・・・・
・・バッキング、４・・・・・・突出部、５・・・・・
・バッキング座面、１２・・・・・・第２突出部、１５
・・・・・・環状溝、１６・・・・・・１つ割口ツクリ
ング、１６ａ。 １６ ｂ・・・・・・遊端部、１７・・・・・・結合ピ
ース、１８ ａ 、１８ ｂ・・・・・・連結片、１９
・・・・・・長さ調整具（ねじ棒）、２１・・・・・・
基部、２２・・・・・・突出片、２３・・・・・・係合
ピン、２４・・・・・・係合孔。[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional view, FIG. FIG. 3 is a view taken along the Ill-III arrow in FIG. 1...Inlet, 2...Inlet, 3...
...Backing, 4...Protrusion, 5...
・Backing seat surface, 12...Second protrusion, 15
...Annular groove, 16...One split ring, 16a. 16 b... Free end portion, 17... Connection piece, 18 a, 18 b... Connection piece, 19
・・・・・・Length adjustment tool (threaded rod), 21・・・・・・
Base, 22... Protrusion piece, 23... Engagement pin, 24... Engagement hole.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 挿口と、開口端部内周に挿口外周に遊嵌する様に突出さ
れた突出部と該突出部の奥側に隣接して設けられた保合
溝と該保合溝の奥側に隣接して形成されたバッキング座
面とを持つ受口と、前記係合溝に嵌合する嵌合部を有す
るバックアップ部と前記バッキング座面と挿口外周面と
の間に圧し潰し状態で介在されるシール部とを持つバッ
キングとからなるスリップ−オン−タイプの管継手にお
いて、受口の前記バッキング座面の奥側に第２突出部を
形成すると共に、該第２突出部の奥側に広巾の第２環状
凹部を形成し、挿口の先端外周に環状溝を形成すると共
に、前記第２突出部に対して管軸方向に保合可能でかつ
前記第２環状四部底面と挿口外周との間の間隙を通過可
能な円環状の１つ割のロックリングを前記環状溝に嵌着
し、該１つ割口ツクリングの両道端部の挿口先端側の側
面に接当しかつ係合具にて該両道端部に係合固定される
結合ピースを設け、該結合ピースは前記保合具をそれぞ
れ有する２つの部分とそれらを互し）に連結する結合ピ
ース長さ調整具とから成り、前記第２突出部と前記ロッ
クリングの間に受口と挿口の相対移動を許す距離を有せ
しめるとともに、前記第２環状凹部の奥端段面と挿口先
端の間に空間を有せしめたことを特徴とする離脱防止管
継手。An insertion port, a protrusion protruding from the inner periphery of the opening end so as to fit loosely around the outer periphery of the insertion port, a retaining groove provided adjacent to the rear side of the protrusion, and adjacent to the rear side of the retaining groove. a socket having a backing seat formed as a backing seat, a backup part having a fitting part that fits into the engagement groove, and a crushed state interposed between the backing seat and the outer circumferential surface of the socket. In a slip-on type pipe joint, a second protrusion is formed on the back side of the backing seating surface of the socket, and a wide width is formed on the back side of the second protrusion. a second annular recess is formed, an annular groove is formed on the outer periphery of the distal end of the insertion port, and the second annular four-part bottom surface and the outer periphery of the insertion port are capable of being secured to the second protrusion in the tube axis direction. An annular split lock ring that can pass through the gap between the lock rings is fitted into the annular groove, and is brought into contact with and engaged with the side surface of the insertion opening tip side of both ends of the split lock ring. A connecting piece is provided that is engaged and fixed to both end portions of the road with a tool, and the connecting piece is composed of two parts each having the retaining tool and a connecting piece length adjustment tool that connects the two parts to each other. , a distance is provided between the second protrusion and the lock ring to allow relative movement of the receptacle and the receptacle, and a space is provided between the inner step surface of the second annular recess and the tip of the receptacle. A detachment prevention pipe joint characterized by: