JP2006283844A

JP2006283844A - Pipe joint

Info

Publication number: JP2006283844A
Application number: JP2005103080A
Authority: JP
Inventors: Masaki Takahashi; 政樹高橋
Original assignee: Nitto Kohki Co Ltd
Current assignee: Nitto Kohki Co Ltd
Priority date: 2005-03-31
Filing date: 2005-03-31
Publication date: 2006-10-19

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint capable of securely holding a flexible hose formed of a rubber. <P>SOLUTION: This pipe joint comprises a collet chuck type hose locking member 20 displaceably fitted to the peripheral surface of a joint body 14 in the axial direction of the joint body and a claw operating member 22. The claw operating member 22 displaces a claw member 20-1 to a radial inner and outer sides when the hose locking member 20 is moved in the axial direction. When a hose H is inserted into the pipe joint, the hose locking member is moved in the axial rear direction by the engagement of the claw member with the outer peripheral surface of the hose. When the hose is extracted from the pipe joint, it is moved in the axial forward direction together with the hose by the engagement of the claw member with the outer peripheral surface of the hose, and the claw member is moved in the radial inner direction by the claw operating member. Then, the claw member bites in the surface of the hose to stop the movement of the hose. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、ゴムなどの軟質材によって形成されるホースを固定保持するための管継手に関する。 The present invention relates to a pipe joint for fixing and holding a hose formed of a soft material such as rubber.

ゴムなどの軟質材によって形成されたホースを受け入れて連結固定する管継手は、ホースの製造公差が大きいために、ホースに対して一定の食込み代で固定する方法では、確実に固定することが困難である。 Pipe joints that accept and connect hoses made of soft materials such as rubber have large manufacturing tolerances, so it is difficult to securely fix them with the method of fixing them with a constant bite allowance. It is.

このため、該ホースに管継手からの引抜力が加わったときに、ホースの公差に余り左右されずに該ホースの表面に所要深さだけ食い込んで、該ホースの引抜を防止するようにした管継手が開発されてきている。（特許文献１参照）
特公平２−３２５１７号 For this reason, when a pulling force is applied to the hose from the pipe joint, the hose is not affected by the tolerance of the hose, and the hose surface is cut into the required depth to prevent the hose from being pulled out. Joints have been developed. (See Patent Document 1)
No. 2-332517

しかしながら、その種の従来の管継手は、構造が複雑であり、製造コストが高くなるなどの問題があり、その解決が求められていた。
本発明は、このような問題を解決した管継手を提供することを目的とするものである。 However, such a conventional pipe joint has problems such as a complicated structure and high manufacturing cost, and a solution has been demanded.
The object of the present invention is to provide a pipe joint that solves such problems.

すなわち、本発明は、
軟質ホースを連結するための管継手において、
当該管継手に挿入される軟質ホースが、嵌合される外周面を備えるホース嵌合部を有する筒状の継手本体と、
該継手本体の周面に該継手本体の軸線方向で変位可能に取り付けられ、該管継手のホース受入開口のある軸線方向前方に向けて延び、当該管継手の半径方向で変位可能とされた爪部材を有するコレットチャック式のホース係止部材と、
該ホース係止部材の周囲に位置決めされて前記継手本体に取り付けられ、前記軸線方向で変位されるホース係止部材の前記爪部材が摺動係合される爪作動用部材と、
を有し、
前記爪作動用部材は、該ホース係止部材が当該管継手のホース受入開口に向けて前記軸線方向前方に、また、該ホース受入開口から離れるように前記軸線方向後方へ動くときに、それぞれ、前記爪部材を半径方向内側に変位させ、また、半径方向外側に変位するのを許容するようになされており、
前記ホース係止部材は、
前記ホースが当該管継手に挿入されるときには、前記爪部材が該ホースの外周面と係合することによって、前記軸線方向後方へ動かされ、
該ホースが当該管継手から引き出されるときには、該爪部材の該ホースの外周面との係合によって、該ホースと共に前記軸線方向前方へ動かされて前記爪部材が前記爪作動用部材によって半径方向内側に動かされ、該爪部材がホース表面に食い込んで該ホースの動きを阻止するようになされ、
前記管継手が更に、前記ホース係止部材を前記軸線方向後方へ変位させて該ホース係止部材の爪部材を半径方向外側に拡げる爪開拡部材を有することを特徴とする管継手を提供する。 That is, the present invention
In pipe joints for connecting soft hoses,
A tubular joint body having a hose fitting portion having an outer peripheral surface to which a soft hose inserted into the pipe joint is fitted;
A claw that is attached to the peripheral surface of the joint main body so as to be displaceable in the axial direction of the joint main body, extends forward in the axial direction of the pipe joint with the hose receiving opening, and is displaceable in the radial direction of the pipe joint. A collet chuck type hose locking member having a member;
A claw actuating member which is positioned around the hose locking member and attached to the joint body, and the claw member of the hose locking member displaced in the axial direction is slidably engaged;
Have
The claw actuating member moves when the hose locking member moves forward in the axial direction toward the hose receiving opening of the pipe joint and backward in the axial direction away from the hose receiving opening, respectively. The claw member is displaced radially inward and allowed to displace radially outward;
The hose locking member is
When the hose is inserted into the pipe joint, the claw member is moved rearward in the axial direction by engaging the outer peripheral surface of the hose,
When the hose is pulled out from the pipe joint, the claw member is moved forward in the axial direction together with the hose by the engagement of the claw member with the outer peripheral surface of the hose, and the claw member is moved radially inward by the claw actuating member. And the claw member bites into the hose surface to prevent the hose from moving,
The pipe joint further includes a claw widening member that displaces the hose locking member rearward in the axial direction to expand the claw member of the hose locking member radially outward. .

具体的には、
前記爪作動用部材は、前記継手本体に同軸状に固定された筒状の部材とされ、その内周面に前方に向って先細りとなる傾斜面部を有し、
前記ホース係止部材の前記爪部材が、該傾斜面部に摺動係合され、前記軸線方向前方に動かされることにより、前記爪部材が該傾斜面部により半径方向内側に変位され、前記軸線方向後方に動かされることにより、前記爪部材が該傾斜面部による半径方向外側に変位されるようにすることができる。 In particular,
The claw actuating member is a cylindrical member fixed coaxially to the joint body, and has an inclined surface portion that tapers forward on the inner peripheral surface thereof,
The claw member of the hose locking member is slidably engaged with the inclined surface portion and moved forward in the axial direction, whereby the claw member is displaced radially inward by the inclined surface portion, and the axial rearward By moving the claw member, the claw member can be displaced radially outward by the inclined surface portion.

また、好ましくは、ホース係止部材を軸線方向前方に付勢する付勢部材を設ける。
前記爪開拡部材は、当該管継手のホース受入開口において継手本体に軸線方向で変位可能に取り付けられており、ホース係止部材の爪部材がホースに食込む軸線方向前方の位置に変位されたときに、該爪部材から軸線方向前方に離れた位置にバネ付勢されているようにすることができる。 Preferably, a biasing member that biases the hose locking member forward in the axial direction is provided.
The claw spreading member is attached to the joint main body so as to be displaceable in the axial direction at the hose receiving opening of the pipe joint, and the claw member of the hose locking member has been displaced to the axially forward position where the claw member bites into the hose. Sometimes, the spring is biased to a position away from the claw member in the axial direction.

本発明に係る管継手は上記のように構成されるので、ホースに対して引抜力が働いた場合、ホース係止部材が該ホースと共に動かされ、それに伴って、該ホース係止部材の爪部材が半径方向に変位され、ホース外周面に十分に食込むようにすることができ、当該ホースの引抜きを確実に防止することが可能となる。 Since the pipe joint according to the present invention is configured as described above, when a pulling force is applied to the hose, the hose locking member is moved together with the hose, and accordingly, the claw member of the hose locking member. Is displaced in the radial direction, and can be sufficiently eaten into the outer peripheral surface of the hose, and the hose can be reliably prevented from being pulled out.

以下、本発明に係る管継手の実施形態を添付図面に基づき説明する。
図１は、本発明に係る管継手１０の上半分を断面で示した図であり、ホースＨが挿入されていない状態を示している。 DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a pipe joint according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view of the upper half of the pipe joint 10 according to the present invention, showing a state where the hose H is not inserted.

図示のように、該管継手１０は、その基本的構成として、当該管継手１０に挿入される軟質ホースＨが嵌合される外周面を備えるホース嵌合部１２（図面では明瞭ではないが、ホース嵌合部先端は少し大径とされ、チャック及びシールをし易くしている）を有する筒状の継手本体１４と、該継手本体１４の周面に該継手本体の軸線方向で変位可能に取り付けられ、該管継手のホース受入開口１６のある軸線方向前方に向けて延び、当該管継手１０の半径方向で変位可能とされた爪部材２０−１を有するコレットチャック式のホース係止部材２０と、該ホース係止部材２０の周囲に位置決めされて継手本体１４に取り付けられ、軸線方向で変位されるホース係止部材２０の爪部材２０−１が摺動係合される爪作動用部材２２とを有する。 As shown in the drawing, the pipe joint 10 has, as its basic structure, a hose fitting portion 12 having an outer peripheral surface to which a soft hose H inserted into the pipe joint 10 is fitted (not clearly shown in the drawing, The tip of the hose fitting part has a slightly larger diameter, which makes it easy to chuck and seal), and can be displaced in the axial direction of the joint body on the peripheral surface of the joint body 14 A collet chuck type hose locking member 20 having a claw member 20-1 attached and extending forward in the axial direction with the hose receiving opening 16 of the pipe joint, which is displaceable in the radial direction of the pipe joint 10. Then, the claw actuating member 22 is slidably engaged with the claw member 20-1 of the hose locking member 20 that is positioned around the hose locking member 20 and attached to the joint body 14 and displaced in the axial direction. And have.

爪作動用部材２２は、該ホース係止部材２０が当該管継手１０のホース受入開口１６に向けて軸線方向前方に、また、該ホース受入開口１６から離れるように軸線方向後方へ動くときに、それぞれ、爪部材２０−１を半径方向内側に変位させ、また、該爪部材２０−１が半径方向外側に変位するのを許容するようになされている。 The claw actuating member 22 is moved forward in the axial direction toward the hose receiving opening 16 of the pipe joint 10 and moved rearward in the axial direction so as to be separated from the hose receiving opening 16. Each of the claw members 20-1 is displaced radially inward, and the claw member 20-1 is allowed to displace radially outward.

ホース係止部材２０は、ホースＨが当該管継手１０に挿入されるときには、爪部材２０−１が該ホースＨの外周面と係合することによって、軸線方向後方（図で見て左方）へ動かされ、該ホースＨが当該管継手から引き出されるとき（図で見て右方へ動かされるとき）には、該爪部材２０−１のホースＨの外周面との係合によって、該ホースＨと共に軸線方向前方へ動かされ、爪部材２０−１が爪作動用部材２２によって半径方向内側に動かされて、該爪部材２０−１がホースＨの表面に食い込んで該ホースＨの動きを阻止するようになされている。 When the hose H is inserted into the pipe joint 10, the hose locking member 20 is engaged with the outer peripheral surface of the hose H so that the claw member 20-1 is rearward in the axial direction (left side in the figure). When the hose H is pulled out from the pipe joint (when moved to the right in the drawing), the engagement of the claw member 20-1 with the outer peripheral surface of the hose H causes the hose to be moved. Along with H, the claw member 20-1 is moved radially inward by the claw actuating member 22, and the claw member 20-1 bites into the surface of the hose H to prevent the movement of the hose H. It is made to do.

管継手１０は、更に、ホース係止部材２０を軸線方向後方へ変位させて該ホース係止部材の爪部材２０−１を半径方向外側に拡げる爪開拡部材２４を有する。 The pipe joint 10 further includes a claw spreading member 24 that displaces the hose locking member 20 rearward in the axial direction to expand the claw member 20-1 of the hose locking member radially outward.

より具体的には、継手本体１４は、その前端のホース嵌合部１２から後方に向けて順次、段状に直径が大きくされており、ホース嵌合部１２に続く第１段部１４−１では、ホース係止部材２０を摺動可能に支持し、次の第２段部１４−２では、筒状とされた爪作動用部材２２がネジ固定されている。 More specifically, the joint body 14 has a diameter that is increased stepwise sequentially from the hose fitting portion 12 at the front end toward the rear, and the first step portion 14-1 following the hose fitting portion 12. Then, the hose locking member 20 is slidably supported, and a cylindrical claw actuating member 22 is screwed in the next second step portion 14-2.

ホース係止部材２０は、第１段部１４−１に摺動可能に支持された筒状の保持体２０−２と、該保持体２０−２の内側に固定された環状部材２０−３とを有しており、上記爪部材２０−１は、該環状部材２０−３の周方向で間隔をあけて複数（例えば６本）設けられ、該環状部材から前方に伸びるようにされている。図示のように、爪部材２０−１は、その前端に外周面が先細りとされたヘッド部２０−４を有しており、該ヘッド部２０−４の内側には、ホースＨに食込み可能な複数の環状係止突起２０−５が設けられている。 The hose locking member 20 includes a cylindrical holding body 20-2 slidably supported by the first step 14-1, and an annular member 20-3 fixed to the inside of the holding body 20-2. A plurality of (for example, six) claw members 20-1 are provided at intervals in the circumferential direction of the annular member 20-3 and extend forward from the annular member. As shown in the figure, the claw member 20-1 has a head portion 20-4 whose outer peripheral surface is tapered at the front end thereof, and can be eaten into the hose H inside the head portion 20-4. A plurality of annular locking projections 20-5 are provided.

筒状とされている爪作動用部材２２は、その前端部分の内周面が前方に向って先細りとなる傾斜面部２２−１とされており、爪部材２０−１のヘッド部２０−４の外周面が該傾斜面部２２−１と摺動係合するようにされている。すなわち、ホース係止部材２０が、軸線方向前方に動かされると、爪部材２０−１が該傾斜面部２２−１により半径方向内側に変位され、軸線方向後方に動かされると、爪部材２０−１がその弾性によって半径方向外側に変位するようにされている。 The claw actuating member 22 having a cylindrical shape is formed as an inclined surface portion 22-1 whose front end portion tapers forward, and the claw member 20-1 has a head portion 20-4. The outer peripheral surface is configured to be slidably engaged with the inclined surface portion 22-1. That is, when the hose locking member 20 is moved forward in the axial direction, the claw member 20-1 is displaced radially inward by the inclined surface portion 22-1, and when moved to the rear in the axial direction, the claw member 20-1. Is displaced radially outward by its elasticity.

ホース係止部材２０の環状部材２０−３と継手本体１４の第２段部１４−２との間には圧縮バネ２３が設けられており、ホース係止部材２０を前方へ付勢しており、爪部材２０−１のヘッド部２０−４が爪作動用部材２２の傾斜面部２２−１に押圧され、ホースＨが挿入されていない状態においては、図１に示す如く、爪部材２０−１のヘッド部２０−４が爪作動用部材２２の前端よりも部分的に前方へ突出し、該ヘッド部２０−４の内周面の環状係止突起２０−５が挿入されてくるホースＨの外周面よりも内側位置となるようにされている。 A compression spring 23 is provided between the annular member 20-3 of the hose locking member 20 and the second step portion 14-2 of the joint body 14, and urges the hose locking member 20 forward. In the state where the head portion 20-4 of the claw member 20-1 is pressed against the inclined surface portion 22-1 of the claw actuating member 22 and the hose H is not inserted, as shown in FIG. The head portion 20-4 protrudes partly forward from the front end of the claw actuating member 22, and the outer periphery of the hose H into which the annular locking projection 20-5 on the inner peripheral surface of the head portion 20-4 is inserted. It is designed to be located inside the surface.

爪開拡部材２４は、爪作動用部材２２の前端部分に軸線方向で変位可能に取り付けられた筒状部材とされており、その前端に、半径方向内側に折り曲げられ、更に、軸線方向後方に向けて折り曲げられた開拡部２４−１を有しており、該開拡部２４−１には、爪部材２０−１のヘッド部２０−４の先端内周面に形成された傾斜面２０−６に対応する角度の傾斜面２４−２が形成されている。図示のように、爪作動用部材２２と爪開拡部材２４との間には、圧縮バネ２６が設けられており、傾斜面２４−２が爪部材２０−１のヘッド部２０−４から前方に離れた状態となるようにされている。 The claw spreading member 24 is a cylindrical member attached to the front end portion of the claw actuating member 22 so as to be displaceable in the axial direction, and is bent radially inward at the front end and further to the rear in the axial direction. The widened portion 24-1 is bent toward the widened portion 24-1, and the widened portion 24-1 has an inclined surface 20 formed on the tip inner peripheral surface of the head portion 20-4 of the claw member 20-1. An inclined surface 24-2 having an angle corresponding to −6 is formed. As shown in the figure, a compression spring 26 is provided between the claw actuating member 22 and the claw opening member 24, and the inclined surface 24-2 is forward of the head portion 20-4 of the claw member 20-1. It is supposed to be in a state of being separated.

図１の状態にある管継手１０に対して、ホースＨを挿入すると、該ホースは爪部材２０−１のヘッド部２０−４の内側を通りながら、該ヘッド部２０−４、従って、ホース係止部材２０を圧縮バネ２３に抗して後方へ変位させ、ホースＨが継手本体１４の第１段部１４−１に突き当たり挿入が完了する。この状態で、ホースＨに流体を流すと、該ホースＨは流体圧によりホース挿入方向とは反対の方向に僅かに後退し、これにより、爪部材２０−１も、前方（図面では右向き）に動かされ、傾斜面２２−１によって半径方向内方に変位され、該爪部材２０−１の環状係止突起２０−５がホースＨの外周面にわずかに食込んだ状態となって、該ホースＨを管継手に保持する（図２）。 When the hose H is inserted into the pipe joint 10 in the state of FIG. 1, the hose passes through the inside of the head portion 20-4 of the claw member 20-1, and the head portion 20-4, therefore, the hose engagement. The stop member 20 is displaced rearward against the compression spring 23, and the hose H hits the first step portion 14-1 of the joint body 14 to complete the insertion. In this state, when a fluid is caused to flow through the hose H, the hose H is slightly retracted in the direction opposite to the hose insertion direction due to the fluid pressure, whereby the claw member 20-1 is also moved forward (rightward in the drawing). The hose H is moved and displaced radially inward by the inclined surface 22-1 so that the annular locking projection 20-5 of the claw member 20-1 slightly bites into the outer peripheral surface of the hose H. H is held in the pipe joint (FIG. 2).

このような状態にあるホースＨに対して当該管継手からの（図面では右向きの）引抜力が加わると、爪部材２０−１は該ホースＨの外周面との係合によって該ホースＨと共に前方へ動かされる。爪部材２０−１が前方に動くと、該爪部材２０−１に摺動係合している爪作動用部材２２の傾斜面部２２−１により、該爪部材２０−１が半径方向内側に変位され、図１に示されるような状態となり、環状係止突起２０−５のホースＨへの食込みが大きくなり、ホースＨにかけられた引抜力に抗して、該ホースＨの当該管継手１０からの引抜を防止する。 When a pulling force (rightward in the drawing) from the pipe joint is applied to the hose H in such a state, the claw member 20-1 moves forward together with the hose H by engagement with the outer peripheral surface of the hose H. Moved to. When the claw member 20-1 moves forward, the claw member 20-1 is displaced inward in the radial direction by the inclined surface portion 22-1 of the claw actuating member 22 slidingly engaged with the claw member 20-1. 1, and the encroachment of the annular locking projection 20-5 into the hose H increases, against the pulling force applied to the hose H, from the pipe joint 10 of the hose H. Prevents pulling out.

爪開拡部材２４は、作業者がホースＨを管継手１０から引き抜くときに使用されるものであり、図２に示すホースＨが挿入された状態にあるときに、該爪開拡部材２４を後方（左方）へ動かすことにより、爪部材２０−１、従って、ホース係止部材２０を図３に示す如く後方へ変位させる。これにより、爪部材２０−１は、ホースＨを後方へ変位させながら、半径方向外側に変位し、従って、該爪部材２０−１が後方へ変位する間に、その環状係止突起２０−５がホースＨから離れ（図３）、従って、その状態でホースＨを引き抜いても、爪部材２０−１がホースＨの動きを阻止することはなく、該ホースを容易に引き抜くことができる。 The claw spreading member 24 is used when an operator pulls out the hose H from the pipe joint 10, and when the hose H shown in FIG. By moving rearward (leftward), the claw member 20-1, and thus the hose locking member 20, is displaced rearward as shown in FIG. As a result, the claw member 20-1 is displaced radially outward while displacing the hose H rearward. Therefore, while the claw member 20-1 is displaced rearward, the annular locking projection 20-5 is displaced. 3 is separated from the hose H (FIG. 3). Therefore, even if the hose H is pulled out in this state, the claw member 20-1 does not block the movement of the hose H, and the hose can be easily pulled out.

また、図１に示すような状態となり、爪部材２０−１の環状係止突起２０−５がホースＨに食込んだ状態においても、爪開拡部材２４を後方へ変位させた場合、爪部材２０−１は上記と同様にしてホースＨから離れ、従って、該ホースＨを引く抜くことが可能となる。 Further, when the nail spreading member 24 is displaced rearward even in the state where the annular locking projection 20-5 of the claw member 20-1 is bitten into the hose H as shown in FIG. 20-1 is separated from the hose H in the same manner as described above, and therefore the hose H can be pulled out.

本発明に係る管継手の上半部分を断面で示した図で、ホースが挿入おらずホース係止部材の爪部材がホース挿入通路に入り込んでいる状態、及び、挿入したホースに引抜力が加わりホース係止部材の爪部材がホースに食込んでホースの引抜を阻止した状態を示している。The figure which showed the upper half part of the pipe joint which concerns on this invention by the cross section, the state which the hose is not inserted but the nail | claw member of the hose latching member has entered the hose insertion channel, and drawing force is added to the inserted hose A state in which the claw member of the hose locking member bites into the hose and prevents the hose from being pulled out is shown. 図１の管継手にホースが挿入された後に、該ホースに流体を通したときの状態を示す、本発明にかかる管継手の上半部分を断面で示した図である。It is the figure which showed the upper half part of the pipe joint concerning this invention in the cross section which shows a state when fluid is passed through this hose after the hose is inserted in the pipe joint of FIG. 作業者がホースを引き抜くためにホース係止部材を後方（左方）に変位させ、該ホース係止部材の爪部材をホースから離した状態を示す図である。It is a figure which shows the state which displaced the hose latching member back (left) in order that an operator might pull out a hose, and separated the nail | claw member of this hose latching member from the hose.

符号の説明Explanation of symbols

Ｈホース
１０管継手
１２ホース嵌合部
１４継手本体
１４−１第１段部
１４−２第２段部
１６ホース受入開口
２０ホース係止部材
２０−１爪部材
２０−２保持体
２０−３環状部材
２０−４ヘッド部
２０−５環状係止突起
２０−６傾斜面
２２爪作動用部材
２２−１傾斜面部
２３圧縮バネ
２４爪開拡部材
２４−１開拡部
２４−２傾斜面
２６圧縮バネ H hose 10 pipe joint 12 hose fitting part 14 joint main body 14-1 first step part 14-2 second step part 16 hose receiving opening 20 hose locking member 20-1 claw member 20-2 holding body 20-3 annular Member 20-4 Head portion 20-5 Annular locking projection 20-6 Inclined surface 22 Claw actuating member 22-1 Inclined surface portion 23 Compression spring 24 Claw widening member 24-1 Inclined portion 24-2 Inclined surface 26 Compression spring

Claims

軟質ホースを連結するための管継手において、
当該管継手に挿入される軟質ホースが、嵌合される外周面を備えるホース嵌合部を有する筒状の継手本体と、
該継手本体の周面に該継手本体の軸線方向で変位可能に取り付けられ、該管継手のホース受入開口のある軸線方向前方に向けて延び、当該管継手の半径方向で変位可能とされた爪部材を有するコレットチャック式のホース係止部材と、
該ホース係止部材の周囲に位置決めされて前記継手本体に取り付けられ、前記軸線方向で変位されるホース係止部材の前記爪部材が摺動係合される爪作動用部材と、
を有し、
前記爪作動用部材は、該ホース係止部材が当該管継手のホース受入開口に向けて前記軸線方向前方に、また、該ホース受入開口から離れるように前記軸線方向後方へ動くときに、それぞれ、前記爪部材を半径方向内側に変位させ、また、半径方向外側に変位するのを許容するようになされており、
前記ホース係止部材は、
前記ホースが当該管継手に挿入されるときには、前記爪部材が該ホースの外周面と係合することによって、前記軸線方向後方へ動かされ、
該ホースが当該管継手から引き出されるときには、該爪部材の該ホースの外周面との係合によって、該ホースと共に前記軸線方向前方へ動かされて前記爪部材が前記爪作動用部材によって半径方向内側に動かされ、該爪部材がホース表面に食い込んで該ホースの動きを阻止するようになされ、
前記管継手が更に、前記ホース係止部材を前記軸線方向後方へ変位させて該ホース係止部材の爪部材を半径方向外側に拡げる爪開拡部材を有することを特徴とする管継手。 In pipe joints for connecting soft hoses,
A tubular joint body having a hose fitting portion having an outer peripheral surface to which a soft hose inserted into the pipe joint is fitted;
A claw that is attached to the peripheral surface of the joint main body so as to be displaceable in the axial direction of the joint main body, extends forward in the axial direction of the pipe joint with the hose receiving opening, and is displaceable in the radial direction of the pipe joint. A collet chuck type hose locking member having a member;
A claw actuating member which is positioned around the hose locking member and attached to the joint body, and the claw member of the hose locking member displaced in the axial direction is slidably engaged;
Have
The claw actuating member moves when the hose locking member moves forward in the axial direction toward the hose receiving opening of the pipe joint and backward in the axial direction away from the hose receiving opening, respectively. The claw member is displaced radially inward and allowed to displace radially outward;
The hose locking member is
When the hose is inserted into the pipe joint, the claw member is moved rearward in the axial direction by engaging the outer peripheral surface of the hose,
When the hose is pulled out from the pipe joint, the claw member is moved forward in the axial direction together with the hose by the engagement of the claw member with the outer peripheral surface of the hose, and the claw member is moved radially inward by the claw actuating member. And the claw member bites into the hose surface to prevent the hose from moving,
The pipe joint further includes a claw widening member that displaces the hose locking member rearward in the axial direction to expand the claw member of the hose locking member radially outward.

前記爪作動用部材が前記継手本体に同軸状に固定された筒状の部材とされ、その内周面に前方に向って先細りとなる傾斜面部を有し、
前記ホース係止部材の前記爪部材が、該爪作動用部材の該傾斜面部に摺動係合され、前記軸線方向前方に動かされることにより、該爪部材が該傾斜面部により半径方向内側に変位され、前記軸線方向後方に動かされることにより、該爪部材が該傾斜面部による半径方向外側に変位されるようにされている
ことを特徴とする請求項１に記載の管継手。 The claw actuating member is a cylindrical member fixed coaxially to the joint body, and has an inclined surface portion that tapers toward the front on its inner peripheral surface,
When the claw member of the hose locking member is slidably engaged with the inclined surface portion of the claw actuating member and moved forward in the axial direction, the claw member is displaced radially inward by the inclined surface portion. The pipe joint according to claim 1, wherein the claw member is displaced radially outward by the inclined surface portion by being moved rearward in the axial direction.

前記ホース係止部材を前記軸線方向前方に付勢する付勢部材を有することを特徴とする請求項１若しくは2に記載の管継手。 3. The pipe joint according to claim 1, further comprising a biasing member that biases the hose locking member forward in the axial direction.

前記爪開拡部材が、当該管継手の前記ホース受入開口において前記継手本体に前記軸線方向で変位可能に取り付けられており、前記ホース係止部材の前記爪部材が前記ホースに食込む前記軸線方向前方の位置に変位されたときに、該爪部材から前記軸線方向前方に離れた位置にバネ付勢されていることを特徴とする請求項１乃至３の何れかに記載の管継手。
The claw opening member is attached to the joint body so as to be displaceable in the axial direction at the hose receiving opening of the pipe joint, and the claw member of the hose locking member bites into the hose. The pipe joint according to any one of claims 1 to 3, wherein when displaced to a forward position, the spring is biased to a position away from the claw member forward in the axial direction.