JP3138311B2 - Pipe fitting structure - Google Patents

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は、管外周面に外嵌される
環状部材と、前記環状部材の内周面に形成される凹入部
と、前記凹入部に径方向内方に移動可能、かつ、回り止
め状態で嵌め込まれる複数の固定用部材と、前記固定用
部材の前記凹入部からの脱落を阻止する脱落阻止部材
と、前記環状部材の外周面側と前記凹入部の内周面側と
に亘って貫通する状態で螺着される螺軸とが備えられ、
前記螺軸の螺進操作で前記固定用部材が径方向内方に押
し出されて前記管外周面に対して圧接され、前記環状部
材が前記管外周面に固定される管継手構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an annular member externally fitted to an outer peripheral surface of a pipe, a concave portion formed on an inner peripheral surface of the annular member, and a radially inwardly movable member. And a plurality of fixing members to be fitted in a non-rotating state, a falling-off preventing member for preventing the fixing member from dropping out of the concave portion, an outer peripheral surface side of the annular member and an inner peripheral surface side of the concave portion. And a screw shaft that is screwed in a state of penetrating therethrough,
The present invention relates to a pipe joint structure in which the fixing member is extruded radially inward by a screwing operation of the screw shaft and pressed against the outer peripheral surface of the pipe, and the annular member is fixed to the outer peripheral surface of the pipe.

【０００２】[0002]

【従来の技術】冒記管継手構造は、管端部等に分岐管や
弁等を接続固定する際に、環状部材の周方向に配設した
複数の固定用部材を、螺軸の螺進操作で管外周面に圧接
させて、環状部材を当該管外周面に固定し、この環状部
材を介して、分岐管や弁等を管端部等に固定するもので
あり、環状部材を管外周面に外嵌する際に凹入部に嵌め
込んだ固定用部材が当該凹入部から脱落しないよう、固
定用部材の凹入部からの脱落を阻止する脱落阻止部材を
設けたものであるが、従来、凹入部と固定用部材との間
に脱落阻止部材としての弾性部材を圧入して固定用部材
の凹入部からの脱落を阻止し、環状部材の外周面側と凹
入部の内周面側とに亘って貫通する状態で螺着してある
螺軸の螺進操作で、弾性部材の弾性力に抗して固定用部
材を押圧して、当該固定用部材を管外周面に圧接させる
よう構成したもの（例えば、実開昭６２−１３３０８０
号公報、特開昭６２−１８４２９５号公報参照）があ
る。2. Description of the Related Art In a pipe joint structure, when connecting and fixing a branch pipe, a valve, or the like to a pipe end or the like, a plurality of fixing members arranged in a circumferential direction of an annular member are screwed by a screw shaft. The annular member is fixed to the outer peripheral surface of the pipe by being pressed against the outer peripheral surface of the pipe by an operation, and a branch pipe, a valve, and the like are fixed to the pipe end and the like via the annular member. In order to prevent the fixing member fitted into the concave portion from falling off from the concave portion when externally fitted to the surface, a fixing member for preventing the fixing member from falling out of the concave portion is provided. An elastic member as a stopper member is press-fitted between the recessed portion and the fixing member to prevent the fixing member from dropping out of the recessed portion, and to the outer peripheral surface side of the annular member and the inner peripheral surface side of the recessed portion. The fixing member is pressed against the elastic force of the elastic member by the screwing operation of the screw shaft screwed in a state penetrating through the Those adapted for pressing the fixing member to the tube outer peripheral surface (e.g., Japanese Utility Model 62-133080
And Japanese Patent Application Laid-Open No. 62-184295 ).

【０００３】[0003]

【発明が解決しようとする課題】上記従来技術によれ
ば、固定用部材を管外周面に向けて押し出す螺軸が、環
状部材の外周面側と凹入部の内周面側とに亘って貫通す
る状態で螺着されているから、螺軸の環状部材外周面か
らの突出量を目視すれば、螺軸の螺進操作忘れの有無や
環状部材の管外周面に対する管径方向での固定姿勢など
を簡便にチェックできる利点があるものの、脱落阻止部
材としての弾性部材を、凹入部と固定用部材との間に圧
入して固定用部材の凹入部からの脱落を阻止しているか
ら、弾性部材の圧入に多大の労力を要し、固定用部材を
圧接させる際にも、弾性部材の弾性力に抗して螺軸を螺
進操作する必要があるから、固定用部材の組付け並びに
管外周面への固定作業に多大の手間と労力を要する欠点
がある。本発明は上記実情に鑑みて成されたものであっ
て、脱落阻止部材の構造を工夫することにより、固定用
部材の凹入部からの脱落を確実に阻止しながらも、固定
用部材の組付け作業を少ない労力で能率良く容易に行う
ことのできる管継手構造を提供することを目的とする。According to the above prior art, the screw shaft for pushing the fixing member toward the outer peripheral surface of the pipe extends through the outer peripheral surface of the annular member and the inner peripheral surface of the recess. Since the amount of protrusion of the screw shaft from the outer peripheral surface of the annular member is visually observed, whether the screw operation of the screw shaft has been forgotten or the posture of the annular member fixed in the pipe radial direction with respect to the outer peripheral surface of the tube is visually confirmed. Although there is an advantage that the member can be easily checked, an elastic member serving as a stopper member is press-fitted between the recessed portion and the fixing member to prevent the fixing member from falling out of the recessed portion. A large amount of labor is required for press-fitting the member, and even when the fixing member is pressed, it is necessary to screw the screw shaft against the elastic force of the elastic member. There is a disadvantage that the fixing work to the outer peripheral surface requires a lot of labor and labor. The present invention was made in view of the above circumstances, by devising the structure of the falling prevention member, fixed
Fixing while securely preventing the member from falling out of the recess
Work of assembling parts for work efficiently with little effort
It is an object of the present invention to provide a pipe joint structure that can be used .

【０００４】[0004]

【課題を解決するための手段】上記目的を達成する為の
本発明の特徴構成は、冒記管継手構造において、前記脱
落阻止部材が、前記凹入部の内周面側に突出させた螺軸
のねじ山に相対回転自在に係止される係止片と、前記固
定用部材に相対回転不能な状態で係止される係止部とを
一体に設けて構成され、前記脱落阻止部材に、前記螺軸
の先端が固定用部材側に接当している状態での螺軸の押
し出し側への螺進操作を許容する回動許容機構が設けら
れている点にあり、かかる構成から次の作用効果を奏す
る。In order to achieve the above object, a feature of the present invention is that, in the above-mentioned pipe joint structure, the falling-off preventing member has a screw shaft protruding toward the inner peripheral surface side of the concave portion. A locking piece that is relatively rotatably locked to the screw thread, and a locking portion that is locked to the fixing member so as to be relatively non-rotatable . The screw shaft
Pushing the screw shaft while the tip of the
The point that a rotation permitting mechanism that allows the screwing operation to the dispensing side is provided is provided, and the following operation and effect are obtained from such a configuration.

【０００５】[0005]

【作用】係止部を固定用部材に係止して脱落阻止部材と
固定用部材とを相対回転不能な状態で連結し、脱落阻止
部材の係止片を螺軸に向ける姿勢で固定用部材を凹入部
に嵌め込んで、螺軸の螺進操作で係止片を螺軸のねじ山
に相対回転自在に係止することにより、或いは、予め凹
入部の内周面側に突出させた螺軸のねじ山に係止片を相
対回転自在に係止することにより、固定用部材が脱落阻
止部材を介して螺軸に連結されて、固定用部材の凹入部
からの脱落が阻止される。そして、このように固定用部
材の脱落が阻止されている環状部材を管外周面に外嵌し
て螺軸を螺進操作しても、固定用部材が凹入部に回り止
め状態で嵌め込まれ、しかも、螺軸のねじ山に脱落阻止
部材の係止片が係合しているから、螺軸先端が固定用部
材側に接当した状態からは螺軸が回らなくなるおそれが
あるが、本願発明では、前記脱落阻止部材に、螺軸の先
端が固定用部材側に接当した状態での押し出し時に、螺
軸の螺進操作を許容する回動許容機構が設けられている
から、螺軸の螺進操作によって固定用部材が確実に径方
向内方に押し出されて管外周面に対して圧接され、環状
部材が管外周面に固定される。The locking member is locked to the fixing member so that the stopper member and the fixing member are connected to each other in a non-rotatable manner, and the locking member of the stopper member faces the screw shaft. Is inserted into the recessed portion, and the locking piece is relatively rotatably locked to the thread of the screw shaft by the screwing operation of the screw shaft, or a screw previously projected to the inner peripheral surface side of the recessed portion. the engaging piece phase to the axis of the screw thread
By locking in a rotatable manner , the fixing member is connected to the screw shaft via the falling-off preventing member, and the fixing member is prevented from falling out of the recessed portion. And even if the annular member, in which the fixing member is prevented from falling off, is externally fitted to the outer peripheral surface of the tube and the screw shaft is operated to be screwed, the fixing member is fitted into the recessed portion in a detented state, Moreover, since the engaging piece of the falling prevention member the thread of the screw shaft is engaged, but is a state where the screw shaft tip is brought into contact with the fixing member side there is a risk that the screw shaft is no slack, the present invention Then, the tip of the screw shaft is
When pushing out with the end touching the fixing member side,
Since the rotation permitting mechanism that allows the shaft to be screwed is provided, the fixing member is reliably pushed inward in the radial direction by the screwed operation of the screw shaft, and is pressed against the outer peripheral surface of the pipe to form a ring. The member is fixed to the outer peripheral surface of the pipe.

【０００６】[0006]

【発明の効果】従って、固定用部材の凹入部からの脱落
を阻止する脱落阻止部材を組み込みながらも、環状部材
の外周面側と凹入部の内周面側とに亘って貫通する状態
で螺着されている螺軸を螺進操作して、螺軸のねじ山を
固定用部材に係合保持された脱落阻止部材の係止片に係
合させるだけで済み、しかも、脱落阻止部材に設けた回
動許容機構によって、螺軸の螺進操作を確実、容易に行
なうことができるから、 従来のように、環状部材の凹入
部と固定用部材との間に脱落阻止部材としての弾性部材
を圧入する場合に比して、固定用部材の凹入部からの脱
落を確実に阻止しながらも、固定用部材の組付け作業を
少ない労力で能率良く容易に行うことができる。Accordingly, the fixing member falls out of the recessed portion.
While incorporating a fall-off prevention member that prevents
Penetrating through the outer peripheral surface side of the inner peripheral surface side of the concave portion
The screwed screw shaft is operated by screwing to adjust the screw thread of the screw shaft.
The locking piece of the falling-off prevention member engaged and held by the fixing member
Only need to be combined with the
The screw movement of the screw shaft is ensured and easy
As in the past, the recess of the annular member
Elastic member as a fall-off prevention member between the part and the fixing member
Of the fixing member from the recess
While firmly preventing dropping, the mounting work of the fixing member
It can be performed efficiently and easily with less labor .

【０００７】[0007]

【実施例】〔第１実施例〕 図６は、地中に埋設された水道管等の既設管１と分岐管
等の新設管２とを接続する管継手構造を示し、新設管２
に形成した既設管１の外径よりも大径の受け口部３に既
設管１の切断端部を挿入し、既設管１の管外周面４に外
嵌した鋳鉄製環状部材５のフランジ５ａと受け口部３に
連設したフランジ３ａとを、受け口部３に装着したパッ
キン６を環状部材５端面で受け口部３と既設管１の管外
周面４との間に押し込むようにして、頭部がＴ字状に形
成されている複数本のボルト７で連結した後、環状部材
５を管外周面４に固定して、既設管１と新設管２とが水
密状態で連結接続されている。前記環状部材５は、図２
乃至図５に示すように、押し込みボルト８の螺進操作で
鋳鉄製固定用部材９に形成した爪９ａを管外周面４に食
い込ませて、既設管１に対して抜け出し不能に固定され
るもので、環状部材５の内周面に周方向に間隔を隔てて
複数の凹入部１０が形成され、この凹入部１０の各々に
固定用部材９が径方向内方に移動可能、かつ、回り止め
状態で嵌め込まれているとともに、環状部材５の外周面
側と凹入部１０の内周面側とに亘って貫通する状態で押
し込みボルト８が螺着され、螺進操作される押し込みボ
ルト８が固定用部材９を径方向内方に押し出して管外周
面４に圧接させ、固定用部材９の爪９ａが管外周面４に
食い込んで固定されるよう構成されている。前記押し込
みボルト８の先端に接当する固定用部材９の接当面１１
が、新設管２から遠ざかるほど既設管１の管外周面４に
近づくテーパ面に形成され、既設管１と新設管２とが管
内の水圧で抜け出し方向に相対移動しようとすると、押
し込みボルト８と固定用部材９の接当面１１との接当で
固定用部材９を更に管外周面４に圧接させる圧接力が発
生して、その相対移動を効果的に防止できるよう構成し
てある。Embodiment 1 First Embodiment FIG. 6 shows a pipe joint structure for connecting an existing pipe 1 such as a water pipe buried underground and a new pipe 2 such as a branch pipe.
The cut end of the existing pipe 1 is inserted into the receiving portion 3 having a larger diameter than the outer diameter of the existing pipe 1 formed in the above, and the flange 5a of the cast iron annular member 5 fitted to the outer peripheral surface 4 of the existing pipe 1 is formed. The flange 3a connected to the receiving port 3 is pushed into the space between the receiving port 3 and the pipe outer peripheral surface 4 of the existing pipe 1 at the end face of the annular member 5 with the packing 6 attached to the receiving port 3 so that the head is After being connected by a plurality of T-shaped bolts 7, the annular member 5 is fixed to the pipe outer peripheral surface 4, and the existing pipe 1 and the new pipe 2 are connected and connected in a watertight state. The annular member 5 is shown in FIG.
As shown in FIGS. 5 to 5, a screw 9a formed on a fixing member 9 made of cast iron is made to bite into the outer peripheral surface 4 of the pipe by screwing operation of the push bolt 8, and is fixed to the existing pipe 1 so as not to come out. A plurality of recesses 10 are formed on the inner peripheral surface of the annular member 5 at intervals in the circumferential direction, and the fixing member 9 is movable inward in the radial direction in each of the recesses 10 and is prevented from rotating. The push-in bolt 8 is screwed in a state where the push-in bolt 8 is screwed in a state penetrating over the outer peripheral surface side of the annular member 5 and the inner peripheral surface side of the recessed portion 10 and is fixed. The fixing member 9 is extruded radially inward and pressed against the outer peripheral surface 4 of the tube, and the claw 9a of the fixing member 9 is fixed by cutting into the outer peripheral surface 4 of the tube. The pushing
Contact surface 11 of fixing member 9 contacting the tip of only bolt 8
Is formed on a tapered surface closer to the outer peripheral surface 4 of the existing pipe 1 as the distance from the new pipe 2 increases, and when the existing pipe 1 and the new pipe 2 are relatively moved in the exit direction by the water pressure in the pipe, the push bolt 8 and The contact between the fixing member 9 and the contact surface 11 generates a pressing force for further pressing the fixing member 9 against the outer peripheral surface 4 of the tube, so that the relative movement can be effectively prevented.

【０００８】前記環状部材５を管外周面４に外嵌する際
に、凹入部１０に嵌め込んだ固定用部材９が当該凹入部
１０から脱落しないよう、各固定用部材９の凹入部１０
からの脱落を阻止するポリプロピレン等の樹脂或いはゴ
ムで一体形成された脱落阻止部材１２が組み込まれてい
る。前記脱落阻止部材１２は、図１（イ），（ロ）に示
すように、凹入部１０の内周面側に突出させた押し込み
ボルト８がその軸芯方向から差し込まれる円筒状のソケ
ット部１３と、ソケット部１３に差し込まれた押し込み
ボルト８のねじ山８ａに相対回転自在に係止される係止
片としての、押し込みボルト８に螺合される雌螺子のね
じ山１４と、固定用部材９に形成した蟻溝１５に沿って
相対回転不能な状態で摺動移動自在に係止される係止部
１６と、固定用部材９の側面９ｂとの接当で当該固定用
部材９を凹入部１０の受け口部３側内周面１７に当て付
ける状態に保持する舌片１８とを一体に設けて構成さ
れ、ソケット部１３に周方向に間隔を隔てて切欠部１９
を形成して、押し込みボルト８の先端が固定用部材９に
接当している状態での押し込みボルト８の押し出し側へ
の螺進操作を許容する回動許容機構が構成されている。
つまり、前記押し込みボルト８の先端が固定用部材９の
接当面１１に接当している状態からの当該押し込みボル
ト８の螺進操作による固定用部材９の押し出し時に、ソ
ケット部１３が拡径方向に弾性変形して雌螺子のねじ山
１４が押し込みボルト８のねじ山８ａから外れ、当該押
し込みボルト８の固定用部材９に対する回動を許容する
回動許容機構が構成されている。When the annular member 5 is externally fitted to the outer peripheral surface 4 of the pipe, the fixing members 9 fitted in the concave portions 10 are prevented from dropping out of the concave portions 10 so that the concave portions 10 of the fixing members 9 are removed.
A falling-off preventing member 12 integrally formed of a resin or rubber such as polypropylene for preventing falling-off from the inside is incorporated. As shown in FIGS. 1 (a) and 1 (b), the drop-off preventing member 12 has a cylindrical socket portion 13 into which a pushing bolt 8 protruding toward the inner peripheral surface side of the concave portion 10 is inserted from the axial direction thereof. A female screw thread 14 screwed to the push bolt 8 as a locking piece that is relatively rotatably locked to the screw thread 8a of the push bolt 8 inserted into the socket portion 13; Along the dovetail groove 15 formed in 9
The fixing member 9 is brought into contact with the side surface 9b of the fixing member 9 so as to be slidably movable in a state in which the fixing member 9 is slidably movable in a state in which the fixing member 9 is not rotatable. And a tongue piece 18 which is held in a state in which the tongue piece 17 is applied to the socket portion 17.
And the tip of the push bolt 8 is fixed to the fixing member 9.
To the pushing side of the pushing bolt 8 in the contact state
Is formed.
That is, when the fixing member 9 is pushed out by the screwing operation of the pushing bolt 8 from the state where the tip of the pushing bolt 8 is in contact with the contact surface 11 of the fixing member 9, the socket portion 13 is moved in the radially expanding direction. Then, the thread 14 of the female screw is disengaged from the thread 8a of the push-in bolt 8 to form a rotation permitting mechanism that allows the push-in bolt 8 to pivot with respect to the fixing member 9.

【０００９】そして、図２に示すように、環状部材５を
既設管１に外嵌する際、予め、係止部１６を固定用部材
９の蟻溝１５に係入して脱落阻止部材１２と固定用部材
９とを連結し、ソケット部１３を押し込みボルト８の先
端側に向ける姿勢で固定用部材９を脱落阻止部材１２ご
と凹入部１０に嵌め込んで、押し込みボルト８をソケッ
ト部１３に差し込みながらその先端が固定用部材９の接
当面１１に接当するまで螺進操作することにより、或い
は、予め凹入部１０の内周面側に突出させた押し込みボ
ルト８を、ソケット部１３に形成した雌螺子のねじ山１
４を弾性変位させながら、その先端が固定用部材９に接
当するまでソケット部１３に強制的に差し込んで、固定
用部材９を凹入部１０に嵌め込むことにより、脱落阻止
部材１２の雌螺子のねじ山１４が押し込みボルト８のね
じ山８ａに係止されて、固定用部材９の凹入部１０から
の脱落が阻止される。このように固定用部材９の脱落が
阻止されている環状部材５を管外周面４に外嵌して押し
込みボルト８を更に螺進操作すると、押し込みボルト８
のねじ山８ａが雌螺子のねじ山１４に対して係脱しなが
ら回転して固定用部材９を押し出し、当該固定用部材９
が管外周面４に圧接されて、爪９ａが管外周面４に食い
込み、環状部材５が管外周面４に固定される。As shown in FIG. 2, when the annular member 5 is externally fitted to the existing pipe 1, the engaging portion 16 is engaged with the dovetail groove 15 of the fixing member 9 in advance, and The fixing member 9 is connected to the fixing member 9, and the fixing member 9 is fitted into the recessed portion 10 together with the falling-off preventing member 12 with the socket portion 13 being pushed toward the distal end of the bolt 8, and the pushing bolt 8 is inserted into the socket portion 13. While the screwing operation was carried out until the front end thereof came into contact with the contact surface 11 of the fixing member 9, or the push bolt 8 projecting in advance to the inner peripheral surface side of the concave portion 10 was formed in the socket portion 13. Female screw thread 1
While the elastic member 4 is elastically displaced, it is forcibly inserted into the socket portion 13 until its tip comes into contact with the fixing member 9, and the fixing member 9 is fitted into the concave portion 10. Is locked to the thread 8a of the push-in bolt 8 to prevent the fixing member 9 from dropping out of the recessed portion 10. When the annular member 5 in which the fixing member 9 is prevented from falling off is fitted to the outer peripheral surface 4 of the pipe and the pushing bolt 8 is further screwed, the pushing bolt 8 is moved.
Of the fixing member 9 is rotated while engaging and disengaging the screw thread 14 of the female screw, and the fixing member 9 is rotated.
Is pressed against the outer peripheral surface 4 of the tube, the claw 9a bites into the outer peripheral surface 4 of the tube, and the annular member 5 is fixed to the outer peripheral surface 4 of the tube.

【００１０】〔第２実施例〕 図７は、脱落阻止部材１２の別実施例を示し、樹脂或い
はゴム製のソケット部１３の基部側に複数の長孔２０を
周方向に沿って形成して強度的に弱い脆弱部を構成し、
押し込みボルト８の先端が固定用部材９の接当面１１に
接当する状態から当該押し込みボルト８を更に螺進操作
すると、押し込みボルト８がソケット部１３に形成した
雌螺子のねじ山１４に螺合したまま、ソケット部１３が
脆弱部で捩じ切られて、当該押し込みボルト８の固定用
部材９に対する回動が許容される回動許容機構を構成し
てある。その他の構成は第１実施例と同様である。[Second Embodiment] FIG. 7 shows another embodiment of the falling-off preventing member 12, in which a plurality of long holes 20 are formed along the circumferential direction on the base side of the socket portion 13 made of resin or rubber. Construct a weak part in strength,
When the push bolt 8 is further screwed from the state where the tip of the push bolt 8 contacts the contact surface 11 of the fixing member 9, the push bolt 8 is screwed into the female thread 14 formed in the socket portion 13. In this state, the socket portion 13 is twisted off at the fragile portion to constitute a rotation permitting mechanism that allows the push bolt 8 to rotate with respect to the fixing member 9. Other configurations are the same as in the first embodiment.

【００１１】〔その他の実施例〕 管外周面に嵌合される環状部材は、周方向に複数個
に分割された円弧状の部材を管外周面に沿って連結して
構成されるものであっても良い。 管外周面に嵌合さ
れる環状部材は、分岐管本体や弁本体等に一体的に設け
られているものであっても良い。 脱落阻止部材の材
質は特に限定されず、金属或いは金属と樹脂やゴムとの
組合せであっても良い。この場合、例えば、第１実施例
においてソケット部を金属で形成し、先端が固定用部材
に接当するまで螺進された或いは強制的に差し込まれた
押し込みボルトを更に螺進操作すると、ソケット部が弾
性変形或いは塑性変形して、押し込みボルトのねじ山が
雌螺子のねじ山に対して係脱しながら回転し、固定用部
材が押し出されるよう構成したり、第２実施例において
ソケット部を薄肉の金属で形成して実施することが考え
られる。 脱落阻止部材に設けられる係止片は、ソケ
ット部の内周面に一体形成されるものに限定されず、ソ
ケット部とは独立して別個に設けて実施しても良い。
脱落阻止部材に設けられる係止片は、螺軸のねじ山に
螺合する雌螺子のねじ山形状に形成されているものに限
定されず、実質的に螺軸のねじ山に係止できる形状或い
は機能を有するものであれば良い。例えば、軟質樹脂や
ゴム等の弾性材料で形成した筒体に、当該筒体を拡径方
向に弾性変形させながら螺軸をねじ込んで、螺軸のねじ
山の間に入り込んだ筒体内周面部分が実質的に係止片と
して機能するよう構成しても良い。この場合、螺軸の回
動操作にともなって筒体内周面が弾性変形することで、
当該螺軸の固定用部材に対する回動を許容する回動許容
機構が構成される。 固定用部材に係止される脱落阻
止部材の係止部は、固定用部材に形成された蟻溝に係止
されるものに限定されず、例えば、固定用部材に形成さ
れた奥広がりの穴に係止されるものや、固定用部材を抱
え込むようにして係止されるものであっても良い。
実施例において、ソケット部の形状は、円筒状に限定さ
れず、固定用部材の姿勢を規制できるものであれば、角
筒状或いは柱状体を環状に配設して構成しても良い。
第２実施例において、脆弱部を構成するために形成し
た複数の長孔に代え、ソケット部の基部側部分を他の部
分よりも薄肉に形成して脆弱部を構成しても良い。[Other Embodiments] The annular member fitted to the outer peripheral surface of the pipe is formed by connecting a plurality of arc-shaped members circumferentially divided along the outer peripheral surface of the pipe. May be. The annular member fitted to the pipe outer peripheral surface may be provided integrally with the branch pipe main body, the valve main body, or the like. The material of the stopper member is not particularly limited, and may be metal or a combination of metal and resin or rubber. In this case, for example, in the first embodiment, the socket portion is formed of metal, and when the push bolt that is screwed or forcibly inserted is further screwed until the tip comes into contact with the fixing member, the socket portion is moved. Is elastically or plastically deformed, the thread of the push-in bolt rotates while engaging and disengaging from the thread of the female screw, and the fixing member is pushed out. In the second embodiment, the socket portion is made thin. It is conceivable to carry out by forming with a metal. The locking pieces provided on the falling-off preventing member are not limited to those integrally formed on the inner peripheral surface of the socket portion, and may be provided separately from the socket portion and implemented.
The locking piece provided on the falling-off preventing member is not limited to the one formed in the thread shape of the female screw screwed into the screw thread of the screw shaft, and can be substantially locked to the screw thread of the screw shaft. Alternatively, any device having a function may be used. For example, a helical shaft is screwed into a cylindrical body formed of an elastic material such as a soft resin or rubber while elastically deforming the cylindrical body in a radially expanding direction, and the inner peripheral surface portion of the cylindrical body that enters between the threads of the helical shaft. May function substantially as a locking piece. In this case, the peripheral surface of the cylinder is elastically deformed by the rotation operation of the screw shaft,
A rotation permitting mechanism that allows the screw shaft to rotate with respect to the fixing member is configured. The locking portion of the falling-off preventing member locked by the fixing member is not limited to the locking portion formed by the dovetail groove formed in the fixing member. It may be one that is locked to the device or one that is locked so as to hold the fixing member.
In the embodiment, the shape of the socket portion is not limited to a cylindrical shape, and may be configured by arranging a rectangular tube or a columnar body in an annular shape as long as the posture of the fixing member can be regulated.
In the second embodiment, instead of a plurality of long holes formed to form the fragile portion, the base portion of the socket portion may be formed to be thinner than other portions to form the fragile portion.

【００１２】尚、特許請求の範囲の項に図面との対照を
便利にするために符号を記すが、該記入により本発明は
添付図面の構成に限定されるものではない。In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

【図面の簡単な説明】[Brief description of the drawings]

【図１】（イ）は要部の分解斜視図、（ロ）は要部の組
付け図1A is an exploded perspective view of a main part, and FIG. 1B is an assembly view of a main part.

【図２】要部の縦断面図FIG. 2 is a longitudinal sectional view of a main part.

【図３】管継手構造を示す要部の縦断面図FIG. 3 is a longitudinal sectional view of a main part showing a pipe joint structure.

【図４】図２のIV−IV線矢視図4 is a view taken in the direction of arrows IV-IV in FIG. 2;

【図５】環状部材の正面図FIG. 5 is a front view of the annular member.

【図６】管継手構造を示す要部の縦断面図FIG. 6 is a longitudinal sectional view of a main part showing a pipe joint structure.

【図７】脱落阻止部材の別実施例を示す斜視図FIG. 7 is a perspective view showing another embodiment of the falling-off preventing member.

【符号の説明】[Explanation of symbols]

４ 管外周面 ５ 環状部材 ８ 螺軸 ８ａ ねじ山 ９ 固定用部材 １０ 凹入部 １２ 脱落阻止部材 １３ ソケット部 １４ 係止片 １６ 係止部 Reference Signs List 4 Pipe outer peripheral surface 5 Annular member 8 Screw shaft 8a Thread 9 Fixing member 10 Depressed portion 12 Drop-off preventing member 13 Socket portion 14 Locking piece 16 Locking portion

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 管外周面（４）に外嵌される環状部材
（５）と、前記環状部材（５）の内周面に形成される凹
入部（１０）と、前記凹入部（１０）に径方向内方に移
動可能、かつ、回り止め状態で嵌め込まれる複数の固定
用部材（９）と、前記固定用部材（９）の前記凹入部
（１０）からの脱落を阻止する脱落阻止部材（１２）
と、前記環状部材（５）の外周面側と前記凹入部 （１
０）の内周面側とに亘って貫通する状態で螺着される螺
軸（８）とが備えられ、前記螺軸 （８）の螺進操作で
前記固定用部材（９）が径方向内方に押し出されて前記
管外周面（４）に対して圧接され、前記環状部材（５）
が前記管外周面（４）に固定される管継手構造におい
て、前記脱落阻止部材（１２）が、前記凹入部（１０）
の内周面側に突出させた螺軸（８）のねじ山 （８ａ）
に相対回転自在に係止される係止片（１４）と、前記固
定用部材（９）に相対回転不能な状態で係止される係止
部（１６）とを一体に設けて構成され、前記脱落阻止部
材（１２）に、前記螺軸（８）の先端が固定用部材
（９）側に接当している状態での螺軸（８）の押し出し
側への螺進操作を許容する回動許容機構が設けられてい
ることを特徴とする管継手構造。An annular member (5) fitted to an outer peripheral surface (4) of a pipe, a concave portion (10) formed on an inner peripheral surface of the annular member (5), and the concave portion (10). A plurality of fixing members (9) which can be moved inward in the radial direction and are fitted in a detented state, and a stopper member for preventing the fixing member (9) from falling out of the recessed portion (10). (12)
And an outer peripheral surface side of the annular member (5) and the concave portion (1).
And a screw shaft (8) that is screwed in a state penetrating the inner peripheral surface side of the screw shaft (0), and the fixing member (9) is radially moved by screwing the screw shaft (8). The pipe is pushed inward and pressed against the pipe outer peripheral surface (4) to form the annular member (5).
Is fixed to the outer peripheral surface (4) of the pipe, the falling-off preventing member (12) is provided with the concave portion (10).
Thread (8a) of the screw shaft (8) protruding toward the inner peripheral surface of the screw shaft (8)
A locking piece (14) locked to be relatively rotatable with the locking member (9) and a locking portion (16) locked to the fixing member (9) in a state in which the locking piece (14) is not rotatable relative to each other; The tip of the screw shaft (8) is fixed to the drop prevention member (12) by a fixing member.
Pushing the screw shaft (8) in contact with the (9) side
A pipe joint structure provided with a rotation permitting mechanism that allows a screwing operation to the side .