JP2018040386A - Separation prevention device and pipe joint including the same - Google Patents

Separation prevention device and pipe joint including the same Download PDF

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JP2018040386A
JP2018040386A JP2016172742A JP2016172742A JP2018040386A JP 2018040386 A JP2018040386 A JP 2018040386A JP 2016172742 A JP2016172742 A JP 2016172742A JP 2016172742 A JP2016172742 A JP 2016172742A JP 2018040386 A JP2018040386 A JP 2018040386A
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locking member
folder
receiving
outer peripheral
locking
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JP6730139B2 (en
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芳則 前田
Yoshinori Maeda
芳則 前田
敏彦 小形
Toshihiko Ogata
敏彦 小形
温志 佐藤
Atsushi Sato
温志 佐藤
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Cosmo Koki Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a separation prevention device capable of sufficiently exhibiting a separation prevention function without affecting sealability of a seal member, and a pipe joint including the separation prevention device.SOLUTION: A separation prevention device includes at least: a body member externally fitted to an outer peripheral surface 1b of a spigot 1a, and having an inner peripheral opposite to an outer peripheral surface; a locking member 6 stored in an inner peripheral part of the body member, and pressed against the body member in an inner diameter direction to be locked to the outer peripheral surface of the spigot part; and a holding member 51 provided between the locking member and a seal member 4, and holding the seal member in a sealed state. Between the locking member and an end part 20d of a socket part 20 on an outer diameter side with respect to the seal member 4 and holding member, provided is an interposed body 7 configured to regulate approach of the locking member in an axial direction.SELECTED DRAWING: Figure 6

Description

本発明は、一方の流路構成部材の受口部に他方の流路構成部材の挿口部を挿入し、リング状のシール部材を介して密封状に接続される接続箇所に設けられ、前記流路構成部材同士の離脱を防止する離脱防止装置及びこの装置を備えた管継手に関する。   The present invention is provided at a connection location where the insertion portion of the other flow path component member is inserted into the receiving portion of the one flow path component member and is connected in a sealed manner via a ring-shaped seal member, The present invention relates to a separation preventing device for preventing separation of flow path components and a pipe joint including this device.

従来の流路構成部材同士の離脱を防止する離脱防止装置としては、流路構成部材を構成する挿口部に外嵌された本体部材の内部に、この挿口部に係止するための係止部材を収容し、挿口部の端部に外嵌したリング状のシール部材及びこれを密封状態で保持する保持部材とともに、別の流路構成部材である受口部に向け管軸方向に挿入して密封状に接続するものがある。   As a conventional separation preventing device for preventing separation between flow path component members, there is a mechanism for engaging with the insertion portion inside a main body member externally fitted to the insertion portion constituting the flow channel component member. A ring-shaped seal member that accommodates the stop member and is fitted on the end of the insertion portion, and a holding member that holds the seal member in a sealed state, together with the receiving portion that is another flow path component member in the tube axis direction Some are inserted and connected in a sealed manner.

このような離脱防止装置には、本体部材の内部に収容した係止部材に、受口部内面に向けて管軸方向に延びる押出軸の一端を接続するものがあり、当該装置の本体部材を受口部に管軸方向に接続する際に、この押出軸の他端が受口部の内面に当接して得られる支持力で、本体部材に伴う係止部材の管軸方向の進入を規制することで、係止部材に与える管軸方向の押圧力を遮断し、この状態で更に管軸方向に進行する本体部材の内面のテーパ面を利用して、この係止部材に内径方向の押圧力を与え、係止部材を挿口部に係止するものがある（例えば、特許文献１参照）。   In such a detachment prevention device, there is a device in which one end of an extrusion shaft extending in the tube axis direction toward the receiving portion inner surface is connected to a locking member housed in the body member, and the body member of the device is When connecting to the receiving port in the tube axis direction, the support force obtained by the other end of the extrusion shaft coming into contact with the inner surface of the receiving port restricts the locking member accompanying the main body member from entering in the tube axis direction. Thus, the pressing force in the tube axis direction applied to the locking member is interrupted, and the pressing surface in the inner diameter direction is applied to the locking member by using the tapered surface of the inner surface of the main body member that further advances in the tube axis direction in this state. There is one that applies pressure and locks the locking member to the insertion portion (see, for example, Patent Document 1).

特開２００５−３０８１８２号公報（第４頁、第６図）Japanese Patent Laying-Open No. 2005-308182 (page 4, FIG. 6)

しかしながら、特許文献１にあっては、流路構成部材を密封するためのシール部材及びこれを保持する保持部材に、係止部材に接続された押出軸を貫通させるための貫通孔が形成されているため、シール部材による密封性に影響を及ぼすばかりか、軸径の細い押出軸では係止部材の管軸方向の移動を規制する十分な支持力を得られず、係止部材に対し管軸方向の押圧力と内径方向の押圧力を複合して与えてしまう結果、係止部材が挿口部の外周面に係止する食い込みに不具合が生じ、所期の離脱防止機能を十分に発揮できない虞が発生するという問題がある。   However, in Patent Document 1, a through-hole for penetrating the extrusion shaft connected to the locking member is formed in the seal member for sealing the flow path component member and the holding member for holding the seal member. Therefore, not only does the seal member affect the sealing performance, but an extruded shaft with a small shaft diameter cannot obtain sufficient support force to restrict the movement of the locking member in the tube axis direction. As a result of the combined pressing force in the direction and the pressing force in the inner diameter direction, there is a problem in the biting that the locking member locks to the outer peripheral surface of the insertion portion, and the intended release prevention function cannot be fully exhibited. There is a problem of fear.

本発明は、このような問題点に着目してなされたもので、シール部材の密封性に影響を与えることなく、且つ離脱防止機能を十分に発揮できる離脱防止装置及びこの装置を備えた管継手を提供することを目的とする。   The present invention has been made paying attention to such problems, and a separation preventing device that can sufficiently exert a separation preventing function without affecting the sealing performance of the sealing member, and a pipe joint including the device. The purpose is to provide.

前記課題を解決するために、本発明の離脱防止装置は、
一方の流路構成部材の受口部にリング状のシール部材を介して他方の流路構成部材の挿口部を挿入し、密封状に接続される接続箇所に設けられ、前記流路構成部材同士の離脱を防止する離脱防止装置であって、
前記挿口部の外周面に外嵌され、前記外周面に対向する内周部を有する本体部材と、前記本体部材の内周部に収容され、前記本体部材により内径方向に押圧されることで前記挿口部の外周面に係止される係止部材と、前記係止部材及び前記シール部材の間に設けられ、前記シール部材を密封状態で保持する保持部材と、を少なくとも備え、
前記係止部材と、前記シール部材及び前記保持部材よりも外径側の前記受口部の端部との間に、前記係止部材の軸方向の進入を規制する介設体が設けられることを特徴としている。
この特徴によれば、係止部材の軸方向の進入を規制する介設体が、当該係止部材と、シール部材及び保持部材よりも外径側の受口部の端部との間に設けられているため、シール部材及び保持部材による密封性に影響を及ぼすことなく、且つ係止部材に与える軸方向の押圧力を遮断した状態で、更に本体部材により係止部材に内径方向の押圧力を与える結果、係止部材による所期の離脱防止機能を発揮させることができる。 In order to solve the above-mentioned problem, the separation preventing device of the present invention is
An insertion port of the other flow path component is inserted into a receiving portion of one flow path component through a ring-shaped seal member, and the flow path component is provided at a connection location connected in a sealed manner. A separation prevention device for preventing separation between each other,
A body member that has an inner peripheral portion that is externally fitted to the outer peripheral surface of the insertion portion and faces the outer peripheral surface, and is accommodated in the inner peripheral portion of the main body member, and is pressed in the inner diameter direction by the main body member. A locking member that is locked to an outer peripheral surface of the insertion portion, and a holding member that is provided between the locking member and the seal member and holds the seal member in a sealed state,
An interposed body is provided between the locking member and the end portion of the receiving portion on the outer diameter side of the sealing member and the holding member to restrict the axial entry of the locking member. It is characterized by.
According to this feature, the interposed body that restricts the axial entry of the locking member is provided between the locking member and the end of the receiving portion on the outer diameter side of the seal member and the holding member. Therefore, the main body member further presses the locking member in the inner diameter direction without affecting the sealing performance of the sealing member and the holding member and blocking the axial pressing force applied to the locking member. As a result, it is possible to exert the intended detachment preventing function by the locking member.

前記介設体は、前記係止部材と一体に形成されていることを特徴としている。
この特徴によれば、係止部材が介設体と一体であるため、係止部材を挿口部の所定位置に対し正確に係止させることができる。 The interposed body is formed integrally with the locking member.
According to this feature, since the locking member is integral with the interposed body, the locking member can be accurately locked to the predetermined position of the insertion portion.

前記介設体は、前記係止部材と別体に形成されていることを特徴としている。
この特徴によれば、係止部材が介設体と別体であるため、離脱方向の外力が作用した際に、係止部材を単独で挿口部に対し容易に傾動させることができる。 The interposed body is formed separately from the locking member.
According to this feature, since the locking member is separate from the interposed body, the locking member can be easily tilted with respect to the insertion portion alone when an external force in the direction of separation is applied.

前記介設体は、前記係止部材の周方向の略中央部に設けられることを特徴としている。
この特徴によれば、周方向の略中央部に設けられた介設体により、係止部材を軸方向に対し傾くことなく進入規制することができる。 The interposed body is provided at a substantially central portion in the circumferential direction of the locking member.
According to this feature, the locking member can be restricted without being inclined with respect to the axial direction by the interposed body provided at the substantially central portion in the circumferential direction.

本発明の管継手は、
前記一方の流路構成部材である受口管と、前記他方の流路構成部材である挿口管と、前記シール部材と、前記離脱防止装置と、を有することを特徴としている。
この特徴によれば、シール部材及び保持部材による密封性に影響を及ぼすことなく、且つ係止部材による所期の離脱防止機能を発揮した管継手を供することができる。 The pipe joint of the present invention is
It has the receiving pipe which is said one flow path component, the insertion pipe which is said other flow path structural member, the said sealing member, and the said separation prevention apparatus, It is characterized by the above-mentioned.
According to this feature, it is possible to provide a pipe joint that does not affect the sealing performance of the sealing member and the holding member, and that exhibits the intended detachment preventing function by the locking member.

実施例１における管継手を示す側断面図である。It is a sectional side view which shows the pipe joint in Example 1. （ａ）は実施例１における押輪の上面図及び押輪を後端側から見た図、（ｂ）は実施例１における押輪のＡ−Ａ断面図及び押輪を先端側から見た図である。(A) is the top view of the press ring in Example 1, and the figure which looked at the press ring from the rear end side, (b) is the AA sectional view of the press ring in Example 1, and the figure which looked at the press ring from the front end side. （ａ）は、第１フォルダ部材を後端側から見た図及びＢ−Ｂ断面図、（ｂ）は、第２フォルダ部材を先端側から見た図及びＣ−Ｃ断面図である。(A) is the figure and BB sectional view which looked at the 1st folder member from the back end side, and (b) is the figure and CC section which looked at the 2nd folder member from the tip side. （ａ）は、フォルダユニットの組立を示す模式図、（ｂ）は、組み上がったフォルダユニットを示す側断面図、（ｃ）は、係止部材を後端側から見た図である。(A) is the schematic diagram which shows the assembly of a folder unit, (b) is a sectional side view which shows the assembled folder unit, (c) is the figure which looked at the latching member from the rear end side. （ａ）は、実施例１における離脱防止装置及び挿口部と受口部との位置合わせをした状態を示す側断面図、（ｂ）は、離脱防止装置及び挿口部を受口部に挿入した状態を示す側断面図である。(A) is the sectional side view which shows the state which aligned the position of the detachment prevention apparatus and insertion part and receiving part in Example 1, (b) is a detachment prevention apparatus and insertion part at the receiving part. It is a sectional side view which shows the state inserted. （ａ）は、実施例１における押輪を受口部に対して近接させた状態を示す側断面図、（ｂ）は、（ａ）の状態から係止部材及び挿口部が離脱方向に移動した状態を示す側断面図である。(A) is a sectional side view showing a state in which the push ring in Example 1 is brought close to the receiving part, and (b) is a state in which the locking member and the insertion part move in the detaching direction from the state of (a). It is a sectional side view which shows the state which carried out. （ａ）は実施例２における第１フォルダ部を後端側から見た図、（ｂ）は、第２フォルダ部を先端側から見た図であり、（ｃ）は、フォルダのＤ−Ｄ断面図である。(A) is the figure which looked at the 1st folder part in Example 2 from the back end side, (b) is the figure which looked at the 2nd folder part from the front end side, (c) is DD of a folder It is sectional drawing. （ａ）は、実施例２における離脱防止装置及び挿口部と受口部との位置合わせをした状態を示す側断面図、（ｂ）は、離脱防止装置及び挿口部を受口部に挿入した状態を示す側断面図である。(A) is the sectional side view which shows the state which aligned the position of the separation prevention apparatus and insertion part and receptacle part in Example 2, (b) is a separation prevention apparatus and insertion part in a receptacle part. It is a sectional side view which shows the state inserted. （ａ）は、実施例２における押輪を受口部に対して近接させた状態を示す側断面図、（ｂ）は、（ａ）の状態から係止部材及び挿口部が離脱方向に移動した状態を示す側断面図である。(A) is a sectional side view showing a state in which the pusher wheel in Example 2 is brought close to the receiving part, and (b) is a state in which the locking member and the insertion part move in the detaching direction from the state of (a). It is a sectional side view which shows the state which carried out. （ａ）は実施例３における押輪の上面図及び押輪を後端側から見た図、（ｂ）は実施例３における押輪のＥ−Ｅ断面図及び押輪を先端側から見た図である。(A) is the top view of the press ring in Example 3, and the figure which looked at the press ring from the rear end side, (b) is the EE sectional drawing of the press ring in Example 3, and the figure which looked at the press ring from the front end side. （ａ）は実施例３における押え部材を後端側から見た図、（ｂ）はＦ−Ｆ断面図である。(A) is the figure which looked at the pressing member in Example 3 from the rear end side, (b) is FF sectional drawing. （ａ）は実施例３において係止部材を押輪に取付けた状態を示す説明図、（ｂ）は、（ａ）の状態から押え部材を取付けた状態を示す説明図である。(A) is explanatory drawing which shows the state which attached the latching member to the press ring in Example 3, (b) is explanatory drawing which shows the state which attached the pressing member from the state of (a). （ａ）は、実施例３における離脱防止装置及び挿口部と受口部との位置合わせをした状態を示す側断面図、（ｂ）は、離脱防止装置及び挿口部を受口部に挿入した状態を示す側断面図である。(A) is the sectional side view which shows the state which aligned the position of the separation prevention apparatus and insertion part and receiving part in Example 3, (b) is a separation prevention apparatus and insertion part in a receptacle part. It is a sectional side view which shows the state inserted. （ａ）は、実施例３における押輪を受口部に対して近接させた状態を示す側断面図、（ｂ）は、（ａ）の状態から係止部材及び挿口部が離脱方向に移動した状態を示す側断面図である。(A) is a sectional side view showing a state in which the pusher wheel in Example 3 is brought close to the receiving part, and (b) is a state in which the locking member and the insertion part move in the detaching direction from the state of (a). It is a sectional side view which shows the state which carried out. （ａ）は実施例４における押輪の上面図及び押輪を後端側から見た図、（ｂ）は実施例４における押輪のＧ−Ｇ断面図及び押輪を先端側から見た図である。(A) is the top view of the press ring in Example 4, and the figure which looked at the press ring from the rear end side, (b) is the GG sectional drawing of the press ring in Example 4, and the figure which looked at the press ring from the front end side. （ａ）は、実施例４における離脱防止装置及び挿口部と受口部との位置合わせをした状態を示す側断面図、（ｂ）は、離脱防止装置及び挿口部を受口部に挿入した状態を示す側断面図である。(A) Side sectional view which shows the state which aligned the position of the separation prevention apparatus and insertion part and receiving part in Example 4, (b) is a separation prevention apparatus and insertion part in a receptacle part. It is a sectional side view which shows the state inserted. （ａ）は、実施例４における押輪を受口部に対して近接させた状態を示す側断面図、（ｂ）は、（ａ）の状態から係止部材及び挿口部を離脱方向に移動させた状態を示す側断面図である。(A) is a sectional side view showing a state in which the push wheel in Example 4 is brought close to the receiving part, and (b) is a state in which the locking member and the insertion part are moved in the detaching direction from the state of (a). It is a sectional side view which shows the state made to do. （ａ）は実施例５における押輪の上面図及び押輪を後端側から見た図、（ｂ）は実施例５における押輪のＨ−Ｈ断面図及び押輪を先端側から見た図である。(A) is the top view of the press ring in Example 5, and the figure which looked at the press ring from the rear end side, (b) is the HH sectional drawing of the press ring in Example 5, and the figure which looked at the press ring from the front end side. （ａ）は実施例５における押え部材にスペーサを取付けた状態を後端側から見た図、（ｂ）はＪ−Ｊ断面図である。(A) is the figure which looked at the state which attached the spacer to the pressing member in Example 5 from the rear end side, (b) is JJ sectional drawing. （ａ）は、実施例５における離脱防止装置及び挿口部と受口部との位置合わせをした状態を示す側断面図、（ｂ）は、離脱防止装置及び挿口部を受口部に挿入した状態を示す側断面図である。(A) Side sectional view which shows the state which aligned the position of the separation prevention apparatus and insertion part and receiving part in Example 5, (b) is a separation prevention apparatus and insertion part in a receptacle part. It is a sectional side view which shows the state inserted. （ａ）は、実施例５における押輪を受口部に対して近接させた状態を示す側断面図、（ｂ）は、（ａ）の状態から係止部材及び挿口部が離脱方向に移動した状態を示す側断面図である。(A) is a side sectional view showing a state in which the push wheel in Example 5 is brought close to the receiving part, and (b) is a state in which the locking member and the insertion part move in the detaching direction from the state of (a). It is a sectional side view which shows the state which carried out. （ａ）は実施例６における第１フォルダ部材にスペーサを取付けた状態を後端側から見た図、（ｂ）はＫ−Ｋ断面図である。(A) is the figure which looked at the state which attached the spacer to the 1st folder member in Example 6 from the rear end side, (b) is KK sectional drawing. （ａ）は、実施例６における離脱防止装置及び挿口部と受口部との位置合わせをした状態を示す側断面図、（ｂ）は、離脱防止装置及び挿口部を受口部に挿入した状態を示す側断面図である。(A) Side sectional view which shows the state which aligned the position of the detachment prevention apparatus and insertion part and receiving part in Example 6, (b) is a detachment prevention apparatus and insertion part at the receiving part. It is a sectional side view which shows the state inserted. （ａ）は、実施例６における押輪を受口部に対して近接させた状態を示す側断面図、（ｂ）は、（ａ）の状態から係止部材及び挿口部が離脱方向に移動した状態を示す側断面図である。(A) is a side sectional view showing a state in which the push wheel in Example 6 is brought close to the receiving part, and (b) is a state in which the locking member and the insertion part move in the detaching direction from the state of (a). It is a sectional side view which shows the state which carried out.

本発明に係る離脱防止装置及びこの装置を備えた管継手を実施するための形態を実施例に基づいて以下に説明する。   EMBODIMENT OF THE INVENTION The form for implementing the separation prevention apparatus which concerns on this invention, and a pipe joint provided with this apparatus is demonstrated below based on an Example.

実施例１に係る離脱防止装置及び管継手につき、図１から図６を参照して説明する。尚、図１の右側（挿口管の先端側）を先端側とし、また図１の左側を後端側として説明する。   The separation preventing device and the pipe joint according to the first embodiment will be described with reference to FIGS. In the following description, the right side of FIG. 1 (the distal end side of the insertion tube) is the distal end side, and the left side of FIG. 1 is the rear end side.

図１に示すように、本実施例の挿口管１（他方の流路構成部材）及び受口管２（一方の流路構成部材）は、例えば、地中に埋設される上水道用のダクタイル鋳鉄製であり、管路部は、内周面がモルタル層で被覆されている。尚、本発明に係る挿口管１及び受口管２は、その他鋳鉄、鋼等の金属製、あるいは石綿、コンクリート製、塩化ビニール、ポリエチレン若しくはポリオレフィン製等であってもよい。更に尚、挿口管１及び受口管２の内周面はモルタル層に限らず、例えばエポキシ樹脂等により被覆されてもよく、若しくは適宜の材料を粉体塗装により挿口管１及び受口管２の内周面に被覆してもよい。また、挿口管１及び受口管２内の流体は、本実施例の上水に限らず、例えば工業用水や農業用水、下水等の他、ガスやガスと液体との気液混合体であっても構わない。   As shown in FIG. 1, the insertion tube 1 (the other flow path component member) and the reception tube 2 (the one flow path component member) of this embodiment are, for example, ductiles for waterworks that are buried in the ground. It is made of cast iron, and the inner peripheral surface of the pipe part is covered with a mortar layer. The insertion tube 1 and the receiving tube 2 according to the present invention may be made of other metals such as cast iron and steel, or made of asbestos, concrete, vinyl chloride, polyethylene, or polyolefin. Furthermore, the inner peripheral surfaces of the insertion tube 1 and the receiving tube 2 are not limited to the mortar layer, and may be coated with, for example, an epoxy resin or the like, or an appropriate material may be coated by powder coating with the insertion tube 1 and the receiving port. The inner peripheral surface of the tube 2 may be covered. In addition, the fluid in the insertion tube 1 and the receiving tube 2 is not limited to the clean water of this embodiment, but is, for example, industrial water, agricultural water, sewage, or the like, or a gas-liquid mixture of gas and gas and liquid. It does not matter.

図１に示すように、本実施例の管継手１０は、挿口管１の端部に形成された挿口部１ａと、受口管２の端部に形成され挿口部１ａが挿入される受口部２０と、離脱防止装置１１と、から主に構成されている。更に離脱防止装置１１は、挿口部１ａの外周面１ｂに外嵌される押輪３（本体部材）と、ゴム製の環状のパッキン４（シール部材）と、環状のフォルダユニット５と、から主に構成されている。   As shown in FIG. 1, the pipe joint 10 of this embodiment includes an insertion port 1 a formed at the end of the insertion tube 1 and an insertion port 1 a formed at the end of the receiving tube 2. The receiving portion 20 and the detachment preventing device 11 are mainly configured. Further, the detachment prevention device 11 is mainly composed of a push ring 3 (main body member) fitted on the outer peripheral surface 1b of the insertion portion 1a, a rubber annular packing 4 (seal member), and an annular folder unit 5. It is configured.

受口部２０は、その開口側端部の外周面の周方向に所定間隔離間して複数のフランジ２５（図１では１つのみ示す）が形成されており、各フランジ２５には、押輪３のフランジ３５と接続するための貫通孔２８が形成されている。受口部２０の内周面には、開口側端部から管軸方向の内方に向けて漸次縮径するテーパ面２０ｃが形成されている。なお、フランジ２５，３５は、複数のみならず、周方向に一体に形成されてもよく、例えば、後端側から見て略矩形状ではなく略円形に単数としてもよい。   The receiving portion 20 is formed with a plurality of flanges 25 (only one is shown in FIG. 1) spaced apart by a predetermined distance in the circumferential direction of the outer peripheral surface of the opening side end portion. A through-hole 28 is formed for connection to the flange 35 of the other. A tapered surface 20c is formed on the inner peripheral surface of the receiving portion 20 so as to gradually reduce the diameter from the opening side end toward the inside in the tube axis direction. The flanges 25 and 35 may be integrally formed in the circumferential direction as well as a plurality. For example, the flanges 25 and 35 may be singularly formed in a substantially circular shape instead of a substantially rectangular shape when viewed from the rear end side.

パッキン４は、挿口部１ａの外周面１ｂに外嵌される環状を成し、自然状態で断面視略円形状に形成された先端部４ａと、断面視略台形状に形成された基部４ｂと、先端部４ａが形成されている一端とは反対側の底部４ｃと、から形成されている（図５参照）。   The packing 4 has an annular shape that is fitted on the outer peripheral surface 1b of the insertion portion 1a, and has a tip portion 4a that is formed in a substantially circular shape in cross section in a natural state and a base portion 4b that is formed in a substantially trapezoidal shape in cross section. And a bottom portion 4c opposite to one end where the tip portion 4a is formed (see FIG. 5).

図２に示されるように、押輪３は、軸方向から見て略矩形状の外形を成すとともに中央部に挿通孔３０が形成される筒状体であり、押輪３の４つの角部それぞれには、貫通孔３８が軸方向に形成されている。また、挿口部１ａが挿通される押輪３の挿通孔３０の内周部には、挿口部１ａの先端側（受口部２０側の端部側）から順に、嵌合凹部３０ａ、収容部３０ｂ、テーパ部３０ｃ、小径部３０ｄが連続して形成されている（特に図２（ｂ）のＡ−Ａ断面図参照）。   As shown in FIG. 2, the pusher wheel 3 is a cylindrical body having a substantially rectangular outer shape when viewed from the axial direction and having an insertion hole 30 formed in the center, and is provided at each of the four corners of the pusher wheel 3. The through-hole 38 is formed in the axial direction. Further, in the inner peripheral portion of the insertion hole 30 of the push ring 3 through which the insertion portion 1a is inserted, the fitting recess 30a and the housing are accommodated sequentially from the distal end side (the end portion side on the receiving portion 20 side) of the insertion portion 1a. The part 30b, the taper part 30c, and the small diameter part 30d are continuously formed (see particularly the AA cross-sectional view of FIG. 2B).

嵌合凹部３０ａは、その内部に後述する第１フォルダ部材５１の環状部５２を嵌合可能となっている。この嵌合凹部３０ａは、押輪３の先端部（受口部２０側の端部）の外縁を除いて略全面が後端部側に凹むように形成されている。   The fitting recess 30a can be fitted with an annular portion 52 of the first folder member 51 to be described later. The fitting recess 30a is formed such that substantially the entire surface is recessed toward the rear end portion except for the outer edge of the front end portion (end portion on the receiving port portion 20 side) of the pusher wheel 3.

収容部３０ｂは、その内部に後述する係止部材６，６，…を嵌合可能となっている。詳しくは、収容部３０ｂには、外径方向に膨出する４つの溝部３０ｇ，３０ｇ，…が周方向に所定間隔離間して形成されており、溝部３０ｇ，３０ｇ，…には、後述する係止部材６，６，…の鍔部７，７，…が嵌入可能になっている。   The accommodating portion 30b can be fitted with locking members 6, 6,. Specifically, four grooves 30g, 30g,... Bulging in the outer diameter direction are formed in the accommodating portion 30b at predetermined intervals in the circumferential direction, and the grooves 30g, 30g,. The flanges 7, 7, ... of the stop members 6, 6, ... can be inserted.

テーパ部３０ｃは、収容部３０ｂから小径部３０ｄに向けて漸次縮径するテーパ面３０ｅと、テーパ面３０ｅにおける小径部３０ｄ側の端部から内径方向に立ち上がる奥端面３０ｆと、を備えている。この奥端面３０ｆは、挿通孔３０の軸方向に対して直交する方向に立ち上がっている。尚、小径部３０ｄは、挿口部１ａの外径よりも若干大径に形成されている。   The tapered portion 30c includes a tapered surface 30e that gradually decreases in diameter from the housing portion 30b toward the small diameter portion 30d, and a back end surface 30f that rises in the inner diameter direction from the end portion on the small diameter portion 30d side of the tapered surface 30e. The rear end surface 30 f rises in a direction orthogonal to the axial direction of the insertion hole 30. The small diameter portion 30d is formed to have a slightly larger diameter than the outer diameter of the insertion portion 1a.

図１に示されるように、フォルダユニット５は、環状の第１フォルダ部材５１と、第１フォルダ部材５１より外径が小径な環状の第２フォルダ部材５６と、第１フォルダ部材５１と第２フォルダ部材５６との間に周方向に所定間隔を置いて取り付けられる４つの係止部材６，６，…と、から構成されている。尚、第１フォルダ部材５１は、係止部材６よりも受口部２０側に配置され、第２フォルダ部材５６は、係止部材６を挟んだ第１フォルダ部材５１の反対側に配置されている。   As shown in FIG. 1, the folder unit 5 includes an annular first folder member 51, an annular second folder member 56 having a smaller outer diameter than the first folder member 51, the first folder member 51, and the second folder member 5. It is comprised from the four latching members 6, 6, ... attached to the folder member 56 at predetermined intervals in the circumferential direction. The first folder member 51 is disposed closer to the receiving portion 20 than the locking member 6, and the second folder member 56 is disposed on the opposite side of the first folder member 51 across the locking member 6. Yes.

図３（ａ）に示されるように、第１フォルダ部材５１（保持部材）は、合成樹脂製であり、板状の環状部５２と、環状部５２から略直角に突出する４つの筒状部５３，５３，…と、から形成されている。環状部５２は、筒状部５３，５３，…側の面が内径方向に向けて縮径するように傾斜するテーパ面５２ａとなっており、このテーパ面５２ａの反対側の面が軸方向に直交する平坦面５２ｂとなっている。また、環状部５２の外周縁には、所定間隔を置いて４つの切欠き部５５，５５，…が形成されている。   As shown in FIG. 3A, the first folder member 51 (holding member) is made of synthetic resin, and has a plate-like annular portion 52 and four tubular portions that protrude from the annular portion 52 at a substantially right angle. 53, 53,... The annular portion 52 is a tapered surface 52a that is inclined so that the surface of the cylindrical portions 53, 53,... Decreases toward the inner diameter direction, and the surface opposite to the tapered surface 52a is in the axial direction. The flat surface 52b is orthogonal. Further, four notches 55, 55,... Are formed on the outer peripheral edge of the annular portion 52 at a predetermined interval.

筒状部５３は、軸方向から見て内径側が開放された略Ｃ字形状を成す凹部５３ｃを備えており、後述する第２フォルダ部材５６の凸部５８が嵌合可能となっている。尚、筒状部５３，５３，…は、隣接する切欠き部５５，５５，…間の略中間位置に配置されている。   The cylindrical portion 53 includes a substantially C-shaped concave portion 53c that is open on the inner diameter side when viewed from the axial direction, and a convex portion 58 of a second folder member 56 described later can be fitted therein. The cylindrical portions 53, 53,... Are disposed at substantially intermediate positions between the adjacent cutout portions 55, 55,.

図３（ｂ）に示されるように、第２フォルダ部材５６は、合成樹脂製であり、第１フォルダ部材５１における環状部５２の外径よりも小径の外形を有する環状部５７と、環状部５７から略直角に突出する４つの凸部５８，５８，…と、から形成されており、凸部５８，５８，…を第１フォルダ部材５１の筒状部５３，５３，…の凹部５３ｃ，５３ｃ，…に嵌合させることで、第１フォルダ部材５１と第２フォルダ部材５６が組み合わせられて軸方向に連結される（図４参照）。また、この第２フォルダ部材５６の環状部５７の内径側には、環状のシール部材１２が装着されるようになっている（図５、図６参照）。   As shown in FIG. 3B, the second folder member 56 is made of synthetic resin, and has an annular portion 57 having an outer diameter smaller than the outer diameter of the annular portion 52 in the first folder member 51, and the annular portion. Are formed from four convex portions 58, 58,... Projecting substantially at right angles from 57, and the convex portions 58, 58,. 53c,..., The first folder member 51 and the second folder member 56 are combined and connected in the axial direction (see FIG. 4). An annular seal member 12 is mounted on the inner diameter side of the annular portion 57 of the second folder member 56 (see FIGS. 5 and 6).

尚、本実施例では、第１フォルダ部材５１及び第２フォルダ部材５６には、筒状部５３，５３，…及び凸部５８，５８，…がそれぞれ４つずつ設けられる形態を説明したが、係止部材６の数量や大きさ等に合わせて自由に設計してもよい。   In the present embodiment, the first folder member 51 and the second folder member 56 have been described as having four cylindrical portions 53, 53,... And four convex portions 58, 58,. You may design freely according to the quantity, size, etc. of the locking member 6.

図４（ａ）に示されるように、第１フォルダ部材５１と第２フォルダ部材５６が連結された際には、第１フォルダ部材５１と第２フォルダ部材５６との間に係止部材６，６，…が挟持される（１つのみ図示）。   As shown in FIG. 4A, when the first folder member 51 and the second folder member 56 are connected, the locking members 6 are interposed between the first folder member 51 and the second folder member 56. 6, are sandwiched (only one is shown).

図４（特に図４（ｃ））に示されるように、係止部材６は、軸方向から見て略弧状を成し、略弧状の複数の爪部６１，６１，…（本実施例では３つ）が並列して内径側に形成された基部６０と、基部６０の周方向の略中央において該基部６０の外周縁における先端部から軸方向に突出する鍔部７（介設体）と、から構成されている。この係止部材６は、ダクタイル鋳鉄製あるいは、その他の金属製、または樹脂製であり、鍔部７は、基部６０と一体形成されている。すなわち本実施例では、係止部材６と介設体である鍔部７とは、一体形成されている。   As shown in FIG. 4 (particularly FIG. 4C), the locking member 6 has a substantially arc shape when viewed from the axial direction, and has a plurality of substantially arc-shaped claw portions 61, 61,. A base 60 formed on the inner diameter side in parallel, and a flange 7 (intermediate body) protruding in the axial direction from the distal end of the outer peripheral edge of the base 60 at a substantially center in the circumferential direction of the base 60. , Is composed of. The locking member 6 is made of ductile cast iron, other metal, or resin, and the flange portion 7 is formed integrally with the base portion 60. That is, in the present embodiment, the locking member 6 and the flange portion 7 that is an interposed body are integrally formed.

基部６０の外周縁における後端部には、鍔部７の反対方向に向けて先細りする第１テーパ面６２が設けられている。また、基部６０における先端側の側面（第１フォルダ部材５１側の端部）には、第１フォルダ部材５１のテーパ面５２ａと略平行となるように傾斜する第２テーパ面６３が設けられている。   A first tapered surface 62 that tapers in a direction opposite to the flange portion 7 is provided at the rear end portion of the outer peripheral edge of the base portion 60. Further, a second tapered surface 63 that is inclined so as to be substantially parallel to the tapered surface 52 a of the first folder member 51 is provided on the side surface on the distal end side of the base portion 60 (the end portion on the first folder member 51 side). Yes.

図４（ｂ）に示されるように、係止部材６が第１フォルダ部材５１と第２フォルダ部材５６との間に挟持された状態にあっては、係止部材６と一体に形成された鍔部７が切欠き部５５に挿入されて係止されている。すなわち、係止部材６は、第１フォルダ部材５１と第２フォルダ部材５６との間に落下が規制された状態で保持される。   As shown in FIG. 4B, when the locking member 6 is sandwiched between the first folder member 51 and the second folder member 56, the locking member 6 is formed integrally with the locking member 6. The collar portion 7 is inserted into the cutout portion 55 and locked. That is, the locking member 6 is held in a state in which dropping is restricted between the first folder member 51 and the second folder member 56.

次に、管継手１０により挿口管１と受口管２とを密封状態で接続するまでの一連の流れを図５〜図６を用いて詳しく説明する。   Next, a series of flow until the insertion tube 1 and the receiving tube 2 are connected in a sealed state by the pipe joint 10 will be described in detail with reference to FIGS.

先ず、図５（ａ）に示されるように、挿口管１の挿口部１ａに、フォルダユニット５（係止部材６，６，…、第１フォルダ部材５１及び第２フォルダ部材５６）を取付けた押輪３とパッキン４とを外嵌させた状態とする。上記状態にあっては、係止部材６，６，…は、その大部分が押輪３の収容部３０ｂ内に嵌合されており、係止部材６，６，…における後端側の一部と第２フォルダ部材５６とは、テーパ部３０ｃ内に収容されている。詳しくは、各係止部材６と一体の各鍔部７の外周面は、収容部３０ｂ（溝部３０ｇ）の内周面に近接するとともに、各係止部材６における第１テーパ面６２とテーパ部３０ｃにおけるテーパ面３０ｅとが当接するようになる。すなわち、挿口部１ａにフォルダユニット５を外嵌した際には、各係止部材６が押輪３の収容部３０ｂ及びテーパ部３０ｃ側に寄って配置されるため、各係止部材６の爪部６１，６１，…が挿口部１ａの外周面１ｂに接触せずに離間するように配置されている。   First, as shown in FIG. 5A, the folder unit 5 (the locking members 6, 6,..., The first folder member 51 and the second folder member 56) is inserted into the insertion portion 1 a of the insertion tube 1. The attached presser wheel 3 and packing 4 are in a state of being externally fitted. In the above state, most of the locking members 6, 6,... Are fitted in the accommodating portion 30b of the pusher wheel 3, and a part of the rear end side of the locking members 6, 6,. And the 2nd folder member 56 is accommodated in the taper part 30c. Specifically, the outer peripheral surface of each flange portion 7 integral with each locking member 6 is close to the inner peripheral surface of the accommodating portion 30b (groove portion 30g), and the first tapered surface 62 and the tapered portion in each locking member 6 are provided. The tapered surface 30e at 30c comes into contact. In other words, when the folder unit 5 is externally fitted to the insertion portion 1a, each locking member 6 is disposed closer to the accommodating portion 30b and the taper portion 30c of the pusher wheel 3, so that the nail of each locking member 6 The parts 61, 61,... Are arranged so as to be separated without contacting the outer peripheral surface 1b of the insertion part 1a.

尚、係止部材６，６，…は、第１フォルダ部材５１及び第２フォルダ部材５６に保持された状態で押輪３内に取付けられるため、押輪３への取付け作業時に係止部材６，６，…が落下することが防止され作業性が高くなっている。   The locking members 6, 6,... Are attached in the pusher wheel 3 while being held by the first folder member 51 and the second folder member 56. , ... are prevented from falling and workability is improved.

次いで、押輪３の貫通孔３８と、受口部２０の貫通孔２８の軸を合わせ、Ｔ頭ボルト８０を貫通孔３８と貫通孔２８とに挿通した状態でナット８５をＴ頭ボルト８０の軸部先端に仮止めする。   Next, the axes of the through hole 38 of the pusher wheel 3 and the through hole 28 of the receiving portion 20 are aligned, and the nut 85 is inserted into the through hole 38 and the through hole 28 and the nut 85 is inserted into the shaft of the T head bolt 80. Temporarily fix to the tip of the part.

次いで、図５（ｂ）に示されるように、挿口部１ａを受口部２０内に所定量挿入した後、押輪３、フォルダユニット５、及びパッキン４を受口部２０に近接するように軸方向に移動する。すると、パッキン４の先端部４ａが挿口部１ａの外周面１ｂと受口部２０の内周面との間で圧接される。前述のように、受口部２０には、開口側に拡径するテーパ面２０ｃが形成されているため、受口部２０に挿口部１ａを挿入しやすく、且つ挿入に伴い互いの軸心が一致するように位置決めされる。   Next, as shown in FIG. 5 (b), after inserting the insertion portion 1 a into the receiving portion 20 by a predetermined amount, the pusher wheel 3, the folder unit 5, and the packing 4 are brought close to the receiving portion 20. Move in the axial direction. Then, the front end 4 a of the packing 4 is pressed between the outer peripheral surface 1 b of the insertion port 1 a and the inner peripheral surface of the receiving port 20. As described above, since the receiving portion 20 has the tapered surface 20c whose diameter increases toward the opening side, the insertion portion 1a can be easily inserted into the receiving portion 20, and the axial centers of the receiving portion 20 are inserted together. Are positioned to match.

挿口部１ａを受口部２０に所定距離挿入し、押輪３を受口部２０に近接するように軸方向に移動すると、鍔部７の端面７ａが受口部２０の開口側端面２０ｄ（受口部の端部）に面当接し、係止部材６の受口部２０方向への移動が規制される。尚、鍔部７の端面７ａが受口部２０の開口側端面２０ｄに当接した際には、押輪３と受口部２０のフランジ２５とは挿入代を残して互いに離間しているとともに、第１フォルダ部材５１のテーパ面５２ａと係止部材６の第２テーパ面６３とは互いに接触している。   When the insertion portion 1a is inserted into the receiving portion 20 for a predetermined distance and the pusher wheel 3 is moved in the axial direction so as to be close to the receiving portion 20, the end surface 7a of the flange portion 7 is opened to the opening-side end surface 20d ( The contact of the locking member 6 in the direction of the receiving port 20 is restricted. When the end surface 7a of the collar portion 7 is in contact with the opening-side end surface 20d of the receiving portion 20, the pusher wheel 3 and the flange 25 of the receiving portion 20 are separated from each other leaving an insertion allowance. The tapered surface 52a of the first folder member 51 and the second tapered surface 63 of the locking member 6 are in contact with each other.

この鍔部７の端面７ａ及び受口部２０の開口側端面２０ｄは、軸方向に対して直交する方向に立ち上がっているため、鍔部７の端面７ａ及び受口部２０の開口側端面２０ｄが面当接した際には、係止部材６を挿口部１ａに対し傾かせることなく受口部２０方向への移動を規制できる。   Since the end surface 7a of the flange portion 7 and the opening-side end surface 20d of the receiving portion 20 rise in a direction orthogonal to the axial direction, the end surface 7a of the flange portion 7 and the opening-side end surface 20d of the receiving portion 20 are When the surface abuts, the movement of the locking member 6 toward the receiving portion 20 can be restricted without tilting the locking member 6 with respect to the insertion portion 1a.

また、鍔部７は、パッキン４や第１フォルダ部材５１等に比べて強度の高い受口部２０の開口側端面２０ｄに当接するため、係止部材６の受口部２０方向への移動を安定して規制できる。   Moreover, since the collar part 7 contacts the opening side end surface 20d of the receiving part 20 having higher strength than the packing 4, the first folder member 51, etc., the movement of the locking member 6 toward the receiving part 20 is performed. It can be regulated stably.

さらに、鍔部７は、係止部材６の周方向の略中央部に設けられているため、鍔部７が受口部２０の開口側端面２０ｄに当接した際に、係止部材６に対して偏った力が働くことを抑制できる。具体的には、鍔部７が受口部２０の開口側端面２０ｄに当接した際に生じる反力を係止部材６全体に略均等に伝えることができるため、係止部材６の周方向の端部側を中心に径方向または軸方向等に回転しようとする偏荷重を抑制できる。   Furthermore, since the collar part 7 is provided in the substantially center part of the circumferential direction of the locking member 6, when the collar part 7 contact | abuts to the opening side end surface 20d of the receiving part 20, it is on the locking member 6. On the other hand, it can suppress that the biased force works. Specifically, since the reaction force generated when the collar portion 7 abuts against the opening-side end surface 20d of the receiving portion 20 can be transmitted substantially uniformly to the entire locking member 6, the circumferential direction of the locking member 6 It is possible to suppress an unbalanced load that tries to rotate in the radial direction or the axial direction around the end portion side.

また、鍔部７は、押輪３の溝部３０ｇに収容されているため、挿口部１ａの受口部２０への挿入作業時に鍔部７の位置ずれが規制される。すなわち、鍔部７は、押輪３の溝部３０ｇにより案内されるため、鍔部７を受口部２０の開口側端面２０ｄに偏当たりさせることなく、係止部材６の受口部２０側の移動を好適に規制できる。   Moreover, since the collar part 7 is accommodated in the groove part 30g of the push ring 3, the position shift of the collar part 7 is restricted at the time of the insertion operation to the receiving part 20 of the insertion part 1a. That is, since the collar part 7 is guided by the groove part 30g of the push ring 3, the movement of the locking member 6 on the mouth part 20 side without causing the collar part 7 to be biased against the opening side end surface 20d of the mouth part 20 is achieved. Can be suitably controlled.

次に、図６（ａ）に示されるように、Ｔ頭ボルト８０とナット８５とを締め付けることで、押輪３を受口部２０側に更に移動させる。前述のように、係止部材６は、鍔部７と受口部２０の開口側端面２０ｄとの面当接により受口部２０側の移動が規制されているため、これに伴い第２フォルダ部材５６は移動せずに係止部材６の後方側に留まる。   Next, as shown in FIG. 6A, the pusher wheel 3 is further moved to the receiving port 20 side by tightening the T-head bolt 80 and the nut 85. As described above, since the locking member 6 is restricted from moving on the receiving portion 20 side by the surface contact between the flange portion 7 and the opening-side end surface 20d of the receiving portion 20, the second folder is associated therewith. The member 56 does not move and stays behind the locking member 6.

一方、第１フォルダ部材５１は、押輪３の受口部２０側への移動に従って、その環状部５２がパッキン４の底部４ｃを受口部２０側に押し付けるように移動する。これにより、パッキン４の基部４ｂが受口部２０のテーパ面２０ｃ及び挿口部１ａの外周面に圧接され、挿口部１ａと受口部２０との間が密封される。また、第１フォルダ部材５１の環状部５２は、押輪３と受口部２０の開口側端面２０ｄとで挟持されるようになるため、パッキン４による挿口部１ａと受口部２０との密封状態が保持される。   On the other hand, the first folder member 51 moves so that the annular part 52 presses the bottom part 4c of the packing 4 against the receiving part 20 side as the push ring 3 moves toward the receiving part 20 side. Thereby, the base part 4b of the packing 4 is press-contacted with the taper surface 20c of the receiving part 20, and the outer peripheral surface of the insertion part 1a, and the space between the insertion part 1a and the receiving part 20 is sealed. Further, since the annular portion 52 of the first folder member 51 is sandwiched between the pusher wheel 3 and the opening-side end surface 20 d of the receiving portion 20, the insertion portion 1 a and the receiving portion 20 are sealed by the packing 4. State is maintained.

すなわち、係止部材６よりも受口部２０側に配置される第１フォルダ部材５１のみが受口部２０側に移動し、第２フォルダ部材５６の移動が規制されるため、第１フォルダ部材５１と第２フォルダ部材５６とが相対的に離間するように移動して互いに分離する。詳しくは、第２フォルダ部材５６の凸部５８，５８，…が第１フォルダ部材５１の筒状部５３，５３，…の凹部５３ｃ，５３ｃ，…内で摺動して第１フォルダ部材５１と第２フォルダ部材５６との連結間隔が拡がる。したがって、第１フォルダ部材５１のテーパ面５２ａと係止部材６の第２テーパ面６３とは、軸方向に寸法Ｌ１分離間することとなる。   That is, since only the first folder member 51 arranged closer to the receiving port 20 than the locking member 6 moves to the receiving port 20 and the movement of the second folder member 56 is restricted, the first folder member 51 and the second folder member 56 are moved away from each other and separated from each other. Specifically, the convex portions 58, 58,... Of the second folder member 56 slide in the concave portions 53c, 53c,... Of the cylindrical portions 53, 53,. The connection interval with the second folder member 56 increases. Therefore, the taper surface 52a of the first folder member 51 and the second taper surface 63 of the locking member 6 are separated by a dimension L1 in the axial direction.

また、係止部材６の受口部２０側の移動が規制された状態で押輪３が受口部２０側に移動すると、係止部材６の第１テーパ面６２と押輪３のテーパ面３０ｅとが摺動するようになり、これにより係止部材６が内径方向に押し付けられるようになる。つまり、押輪３の受口部２０への移動が第１テーパ面６２とテーパ面３０ｅとの摺動により係止部材６を内径方向に押圧する押圧力に変換された結果、係止部材６の爪部６１，６１，…が挿口部１ａの外周面１ｂに食い込むことになる。鍔部７が係止部材６の軸方向の進入を規制した状態で、爪部６１，６１，…の挿口部１ａの外周面１ｂに食い込むため、挿口管１の先端側の端部が受口部３０内周側部に当接して挿入困難になる虞を防ぎながら効果的な食い込みを実現でき、爪部６１，６１，…のうち後端部側の爪部６１に食い込みが集中し、所期の初期状態食い込みを実現する。   Further, when the pusher wheel 3 moves to the receiving port 20 side in a state where the movement of the locking member 6 on the receiving port 20 side is restricted, the first tapered surface 62 of the locking member 6 and the tapered surface 30e of the pressing wheel 3 Slid, and thereby the locking member 6 is pressed in the inner diameter direction. That is, as a result of the movement of the push ring 3 to the receiving portion 20 being converted into a pressing force that presses the locking member 6 in the inner diameter direction by sliding between the first tapered surface 62 and the tapered surface 30e, the locking member 6 The nail | claw part 61, 61, ... bites into the outer peripheral surface 1b of the insertion part 1a. In the state in which the flange portion 7 restricts the locking member 6 from entering in the axial direction, the end portion on the distal end side of the insertion tube 1 is inserted into the outer peripheral surface 1b of the insertion portion 1a of the claw portions 61, 61,. It is possible to achieve effective biting while preventing the possibility of difficult insertion due to contact with the inner peripheral side portion of the receiving portion 30, and the biting is concentrated on the claw portion 61 on the rear end side of the claw portions 61, 61,. Realize the expected initial state bite.

このように、係止部材６の軸方向の進入を規制する鍔部７が、当該係止部材６と、パッキン４及び第１フォルダ部材５１よりも外径側の受口部２０の開口側端面２０ｄとの間に設けられているため、係止部材６及び鍔部７がパッキン４に直接接触することが無い。そのため、第１フォルダ部材５１で保持されるパッキン４による密封性に影響を及ぼすことを防止できるとともに、係止部材６の傾き等を抑制して該係止部材６による所期の離脱防止機能を発揮させることができる。   In this way, the flange portion 7 that restricts the locking member 6 from entering in the axial direction has the opening-side end surface of the receiving member 20 on the outer diameter side of the locking member 6 and the packing 4 and the first folder member 51. Since it is provided between 20d, the locking member 6 and the flange 7 do not directly contact the packing 4. Therefore, it is possible to prevent the sealing performance by the packing 4 held by the first folder member 51 from being affected, and to suppress the inclination of the locking member 6 and the like, and to provide an intended release preventing function by the locking member 6. It can be demonstrated.

尚、鍔部７は、パッキン４に直接接触することが無いため、鍔部７の形状及び大きさの設計自由度が増し、例えば鍔部７が受口部２０の開口側端面２０ｄに当接する領域を大きくできる。これにより、係止部材６の受口部２０への移動を安定的に規制することができる。   In addition, since the collar part 7 does not contact the packing 4 directly, the design freedom of the shape and magnitude | size of the collar part 7 increases, for example, the collar part 7 contact | abuts to the opening side end surface 20d of the opening part 20. FIG. The area can be enlarged. Thereby, the movement to the receiving part 20 of the latching member 6 can be controlled stably.

また、鍔部７は、係止部材６と一体に形成されているため、係止部材６を挿口部１ａの外周面１ｂの所定位置に対し正確に係止させることができる。具体的には、鍔部７は、係止部材６と一体に形成されているため、鍔部７が受口部２０の開口側端面２０ｄに当接した際に生じる反力が係止部材６に対して直接伝わるため、係止部材６を内径方向に押圧する押圧力が分散されることがなく、係止部材６を挿口部１ａの外周面１ｂに正確に係止できる。   Moreover, since the collar part 7 is integrally formed with the locking member 6, the locking member 6 can be correctly locked with respect to the predetermined position of the outer peripheral surface 1b of the insertion part 1a. Specifically, since the flange portion 7 is formed integrally with the locking member 6, the reaction force generated when the flange portion 7 abuts on the opening side end surface 20 d of the receiving portion 20 is the locking member 6. Therefore, the pressing force that presses the locking member 6 in the inner diameter direction is not dispersed, and the locking member 6 can be accurately locked to the outer peripheral surface 1b of the insertion portion 1a.

また、前述のように、係止部材６の傾き等が規制された状態で受口部２０側の移動が規制されているため、係止部材６の爪部６１，６１，…が挿口部１ａの外周面１ｂに対し略均等に食い込むようになる。換言すれば、係止部材６の爪部６１，６１，…が局所的に挿口部１ａの外周面１ｂに食い込むことを抑制できる。   Further, as described above, since the movement of the receiving portion 20 side is restricted in a state where the inclination of the engaging member 6 is restricted, the claw portions 61, 61,. It bites into the outer peripheral surface 1b of 1a substantially evenly. In other words, it is possible to suppress the claw portions 61, 61,... Of the locking member 6 from locally biting into the outer peripheral surface 1b of the insertion portion 1a.

次いで、図６（ｂ）に示されるように、挿口部１ａを受口部２０から離脱する方向に地震等の不測の外力が作用した場合について説明する。この外力により、係止部材６が挿口部１ａと一緒に受口部２０から離れる方向に移動する。具体的には、第１フォルダ部材５１のテーパ面５２ａと係止部材６の第２テーパ面６３とが軸方向に寸法Ｌ１よりも大きな寸法Ｌ２分離間することとなる（Ｌ１＜Ｌ２）。   Next, as shown in FIG. 6B, a case where an unexpected external force such as an earthquake acts in a direction in which the insertion portion 1 a is detached from the receiving portion 20 will be described. Due to this external force, the locking member 6 moves in the direction away from the receiving portion 20 together with the insertion portion 1a. Specifically, the taper surface 52a of the first folder member 51 and the second taper surface 63 of the locking member 6 are separated by a dimension L2 larger than the dimension L1 in the axial direction (L1 <L2).

このように、係止部材６が挿口部１ａと一緒に受口部２０から離れる方向に移動するため、係止部材６は、押輪３のテーパ面３０ｅによってさらに内径方向へと押圧され、爪部６１が挿口部１ａの外周面１ｂにさらに食い込む。この際、爪部６１は楔効果と後端部側爪部６１を中心とした係止部材６の傾動効果で食い込み、効果的な離脱防止力を発揮するが、前述したように後端部側爪部６１に初期状態で食い込み力が集中しているので、係止部材６の傾動により先端部側爪部６１の食い込みが過度にならず、各爪部６１，６１，…が均等な食い込みを発揮しながらも、管内周面（例えばモルタル層）への影響をも抑えることができる。係止部材６の爪部６１の刃先は、受口部２０側を向くように径方向（軸方向と直交する方向）に対して傾斜しているため、係止部材６は挿口部１ａと受口部２０との離脱方向への楔効果を発揮することができる。   Thus, since the locking member 6 moves in the direction away from the receiving portion 20 together with the insertion portion 1a, the locking member 6 is further pressed in the inner diameter direction by the tapered surface 30e of the pusher wheel 3, and the claw The part 61 further bites into the outer peripheral surface 1b of the insertion part 1a. At this time, the claw portion 61 bites in due to the wedge effect and the tilting effect of the locking member 6 with the rear end side claw portion 61 as the center, and exhibits an effective detachment preventing force. Since the biting force is concentrated on the claw portion 61 in the initial state, the claw portion 61 does not bite excessively due to the tilting of the locking member 6, and each claw portion 61, 61,. While exerting, the influence on the pipe inner peripheral surface (for example, a mortar layer) can be suppressed. Since the cutting edge of the claw portion 61 of the locking member 6 is inclined with respect to the radial direction (direction perpendicular to the axial direction) so as to face the receiving port 20 side, the locking member 6 is connected to the insertion port 1a. A wedge effect in the direction of separation from the receiving portion 20 can be exhibited.

また、挿口部１ａが受口部２０から離脱する方向に移動すると、第２フォルダ部材５６の環状部５７と押輪３の奥端面３０ｆとでシール部材１２が狭圧され、押輪３と挿口部１ａとの間が密封される。さらに上記した係止部材６の移動によっても、第１フォルダ部材５１は移動することなくパッキン４を保持し続けるため、パッキン４の密封性を維持することができる。   Further, when the insertion portion 1a moves in the direction away from the receiving portion 20, the seal member 12 is narrowed by the annular portion 57 of the second folder member 56 and the rear end surface 30f of the pusher wheel 3, and the pusher wheel 3 and the insertion member are inserted. The space between the portion 1a is sealed. Furthermore, since the first folder member 51 continues to hold the packing 4 without moving by the movement of the locking member 6 described above, the sealing performance of the packing 4 can be maintained.

また、各係止部材６は、押輪３の溝部３０ｇに嵌合しているため、挿口管１に周方向へ回転する力が働いた際には、溝部３０ｇにより係止部材６が規制され挿口管１の回転を防ぐことができる。   Further, since each locking member 6 is fitted in the groove portion 30g of the push ring 3, when the force that rotates in the circumferential direction acts on the insertion tube 1, the locking member 6 is regulated by the groove portion 30g. The rotation of the intubation tube 1 can be prevented.

尚、本実施例では、係止部材６を４つ用いる形態を例示したが、本発明はこれに限定されるものではなく、係止部材の数量は挿口部の外径等に合わせて適宜変更することができる。さらに尚、係止部材６には３つの爪部６１，６１，…が設けられていたが、少なくとも１つ設けられていれば、爪部の数量を適宜変更してもよいし、爪部の形状も自由に変更できる。   In addition, although the form which uses the four locking members 6 was illustrated in a present Example, this invention is not limited to this, The quantity of a locking member is suitably set according to the outer diameter etc. of an insertion part. Can be changed. Furthermore, although the locking member 6 is provided with the three claw portions 61, 61,..., The number of the claw portions may be appropriately changed as long as at least one claw portion is provided. The shape can be changed freely.

また、本実施例では、ダクタイル鋳鉄製の挿口管１及び受口管２を用いる形態であるため、離脱防止機能を高めるために係止部材６を複数用いていたが、例えば、挿口管及び受口管が塩化ビニール、ポリエチレン若しくはポリオレフィン等の合成樹脂製である場合には、正面視略Ｃ字状となるように周方向に連続する１つの係止部材を用いてもよい。   Further, in this embodiment, since the duct tube cast iron insertion tube 1 and the reception tube 2 are used, a plurality of locking members 6 are used in order to enhance the detachment prevention function. When the receiving tube is made of a synthetic resin such as vinyl chloride, polyethylene, or polyolefin, a single locking member that is continuous in the circumferential direction may be used so as to be substantially C-shaped when viewed from the front.

次に、実施例２に係る離脱防止装置及び管継手につき、図７〜図９を参照して説明する。尚、前記実施例と同一構成部分と同一構成部分については同一符号を付して重複する説明を省略する。   Next, the separation preventing device and the pipe joint according to the second embodiment will be described with reference to FIGS. The same components as those in the above embodiment are denoted by the same reference numerals, and redundant description is omitted.

本実施例における係止部材６は、フォルダ２５０により保持されている（図８参照）。図７に示されるように、フォルダ２５０は、係止部材６の先端部側に配置される第１フォルダ部２５１（保持部材）と、係止部材６の後端部側に配置される第２フォルダ部２５６と、第１フォルダ部２５１及び第２フォルダ部２５６を連結する複数の連結部２５３，２５３，…と、から主に構成されている。これら第１フォルダ部２５１、第２フォルダ部２５６及び連結部２５３，２５３，…は、合成樹脂により一体形成されている。   The locking member 6 in this embodiment is held by a folder 250 (see FIG. 8). As shown in FIG. 7, the folder 250 includes a first folder portion 251 (holding member) disposed on the distal end side of the locking member 6 and a second folder disposed on the rear end side of the locking member 6. It is mainly comprised from the folder part 256 and several connection part 253,253, ... which connects the 1st folder part 251 and the 2nd folder part 256. FIG. The first folder part 251, the second folder part 256, and the connecting parts 253, 253,... Are integrally formed of synthetic resin.

第１フォルダ部２５１は、環状を成し、その外周縁には、所定間隔を置いて４つの切欠き部５５，５５，…が形成されている。第２フォルダ部２５６は、第１フォルダ部２５１の外径よりも小径の外径を有する環状を成しており、該第２フォルダ部２５６における第１フォルダ部２５１側の面には、突条部２５６ａ，２５６ａ，…が周方向に所定間隔離間して突出形成されている（本実施例では８つ）。   The first folder part 251 has an annular shape, and four notches 55, 55,... The second folder portion 256 has an annular shape having an outer diameter smaller than the outer diameter of the first folder portion 251, and a protrusion on the surface of the second folder portion 256 on the first folder portion 251 side. The portions 256a, 256a,... Are projected at a predetermined interval in the circumferential direction (eight in this embodiment).

連結部２５３，２５３，…は、本実施例では８つ設けられており、係止部材６の周方向の長さと略同一幅で離間して一対を成すように周方向に４組配置されている。一対を成す連結部２５３，２５３の間には、係止部材６を収容できるようになっている。   In this embodiment, eight connecting portions 253, 253,... Are provided, and four sets are arranged in the circumferential direction so as to form a pair with a substantially same width as the circumferential length of the locking member 6. Yes. The locking member 6 can be accommodated between the pair of connecting portions 253 and 253.

また、この連結部２５３は、板状を成す板状部２５３ａと、一対を成す他方の連結部２５３に向けて突出する膨出部２５３ｂと、を備えている。この膨出部２５３ｂは、係止部材６の周方向の両端に形成された図示しない凹部に対して嵌合するようになっており、一対を成す連結部２５３，２５３の間に係止部材６が収容された際に、係止部材６の周方向の移動を防止できるようになっている。   Moreover, this connection part 253 is provided with the plate-shaped part 253a which comprises plate shape, and the bulging part 253b which protrudes toward the other connection part 253 which comprises a pair. The bulging portion 253b is adapted to fit into recesses (not shown) formed at both ends of the locking member 6 in the circumferential direction, and the locking member 6 is interposed between a pair of connecting portions 253 and 253. When the is accommodated, the movement of the locking member 6 in the circumferential direction can be prevented.

尚、板状部２５３ａは、軸方向（第１フォルダ部２５１及び第２フォルダ部２５６が離間する方向）に所定以上の引張力が働くことで破断または伸長可能なように、他の部位に比べて脆弱に形成されている。   The plate-like portion 253a is compared to other portions so that the plate-like portion 253a can be broken or stretched by a predetermined tensile force in the axial direction (the direction in which the first folder portion 251 and the second folder portion 256 are separated). It is fragile.

挿口管１と受口管２とを接続する際には、前記実施例と同様に、図８（ａ）に示されるように、挿口部１ａに、係止部材６，６，…及びフォルダ２５０を取付けた押輪３とパッキン４とを外嵌させ、挿口部１ａを受口部２０の開口近傍に配置する。尚、係止部材６，６，…をフォルダ２５０に取付けた状態にあっては、突条部２５６ａ，２５６ａ，…が係止部材６，６，…の内径方向への移動を規制している。すなわち、係止部材６，６，…はフォルダ２５０に対し落下することなく保持されている。   When the insertion tube 1 and the reception tube 2 are connected, as shown in FIG. 8A, the insertion member 1a is provided with the locking members 6, 6,. The push ring 3 attached with the folder 250 and the packing 4 are externally fitted, and the insertion portion 1 a is disposed in the vicinity of the opening of the receiving portion 20. When the locking members 6, 6,... Are attached to the folder 250, the protrusions 256a, 256a,... Restrict the movement of the locking members 6, 6,. . That is, the locking members 6, 6,... Are held without dropping with respect to the folder 250.

次いで、図８（ｂ）に示されるように、挿口部１ａを受口部２０に所定距離挿入し、押輪３を受口部２０に近接するように軸方向に移動すると、鍔部７が受口部２０の開口側端面２０ｄに当接し、係止部材６の受口部２０方向への移動が規制される。   Next, as shown in FIG. 8 (b), when the insertion portion 1 a is inserted into the receiving portion 20 by a predetermined distance and the pusher wheel 3 is moved in the axial direction so as to be close to the receiving portion 20, the collar portion 7 is moved. Abutting on the opening-side end surface 20d of the receiving portion 20, the movement of the locking member 6 in the direction of the receiving portion 20 is restricted.

次に、図９（ａ）に示されるように、Ｔ頭ボルト８０とナット８５とを締め付けることで、押輪３を受口部２０側に更に移動させる。これにより、第１フォルダ部２５１と第２フォルダ部２５６とが相対的に離間するように移動するため、前述した各連結部２５３の板状部２５３ａ（脆弱部）が破断または伸長するとともに、係止部材６の爪部６１，６１，…が挿口部１ａの外周面１ｂに食い込むようになる。このとき、第１フォルダ部２５１が押輪３と受口部２０の開口側端面２０ｄとで挟持されるようになるため、パッキン４による挿口部１ａと受口部２０との密封状態が保持される。   Next, as shown in FIG. 9A, the pusher wheel 3 is further moved to the receiving port 20 side by tightening the T-head bolt 80 and the nut 85. As a result, the first folder portion 251 and the second folder portion 256 move so as to be relatively separated from each other, so that the plate-like portion 253a (fragile portion) of each connecting portion 253 described above breaks or extends, and The claw portions 61, 61,... Of the stop member 6 bite into the outer peripheral surface 1b of the insertion portion 1a. At this time, since the first folder part 251 is sandwiched between the pusher wheel 3 and the opening side end face 20d of the receiving part 20, the sealed state between the insertion part 1a and the receiving part 20 by the packing 4 is maintained. The

そして、図９（ｂ）に示されるように、挿口部１ａを受口部２０から離脱する方向に地震等の不測の外力が作用した場合、この外力により、係止部材６をさらに挿口部１ａの外周面１ｂにさらに食い込ませることで楔効果と傾動効果を発揮し、挿口管１と受口管２との離脱を防止する。   Then, as shown in FIG. 9B, when an unexpected external force such as an earthquake acts in a direction in which the insertion portion 1 a is detached from the receiving portion 20, the locking member 6 is further inserted by this external force. The wedge effect and the tilting effect are exhibited by further biting into the outer peripheral surface 1b of the portion 1a, and the detachment of the insertion tube 1 and the receiving tube 2 is prevented.

次に、実施例３に係る離脱防止装置及び管継手につき、図１０〜図１４を参照して説明する。尚、前記実施例に示される構成部分と同一構成部分については同一符号を付して重複する説明を省略する。   Next, a separation preventing device and a pipe joint according to the third embodiment will be described with reference to FIGS. Note that the same components as those shown in the embodiment are given the same reference numerals and redundant description is omitted.

図１０に示されるように、本実施例の押輪３０３は、挿口部１ａが挿通される挿通孔３３０を有し、挿通孔３３０の内周部には、係止部材６を収容可能な収容溝部３１０が周方向に離間して複数形成されている（本実施例では４つ）。収容溝部３１０は、係止部材６の基部６０を収容する収容部３３０ｂと、係止部材６の鍔部７を収容する溝部３３０ｇとから構成されている。   As shown in FIG. 10, the push ring 303 of the present embodiment has an insertion hole 330 through which the insertion portion 1 a is inserted, and the inner periphery of the insertion hole 330 can accommodate the locking member 6. A plurality of groove portions 310 are formed apart from each other in the circumferential direction (four in this embodiment). The housing groove portion 310 includes a housing portion 330 b that houses the base portion 60 of the locking member 6 and a groove portion 330 g that houses the flange portion 7 of the locking member 6.

また、押輪３の先端部には、嵌合凹部３３０ａと、後述の押え部材３５１を保持するための複数の凸部３０２と、が形成されている。複数の凸部３０２は、所定間隔離間して正面視略環状を成すように配設されている。また押輪３の後端部には、小径部３３０ｄが形成されている。   In addition, a fitting recess 330 a and a plurality of convex portions 302 for holding a presser member 351 described later are formed at the tip of the presser wheel 3. The plurality of convex portions 302 are disposed so as to form a substantially annular shape in front view with a predetermined spacing therebetween. A small diameter portion 330d is formed at the rear end portion of the pusher wheel 3.

収容部３３０ｂには、収容部３３０ｂから小径部３３０ｄに向けて漸次縮径するテーパ面３３０ｅと、テーパ面３３０ｅにおける小径部３３０ｄ側の端部から内径方向に立ち上がる奥端面３３０ｆと、を備えている。   The accommodating portion 330b includes a tapered surface 330e that gradually decreases in diameter from the accommodating portion 330b toward the small diameter portion 330d, and a back end surface 330f that rises in the inner diameter direction from the end on the small diameter portion 330d side of the tapered surface 330e. .

図１１に示されるように、本実施例に用いられるパッキン４を密封状態で保持する保持部材としての押え部材３５１は、合成樹脂製の平板材により環状に形成されている。この押え部材３５１の外周縁には、所定間隔を置いて４つの切欠き部３５５，３５５，…が形成されている。また、押え部材３５１の後端側の端面には、内径方向に向けて縮径するように傾斜するテーパ面３５２ａを有しており、押え部材３５１の先端側の端面は、軸方向に直交する平坦面３５２ｂとなっている。   As shown in FIG. 11, the pressing member 351 as a holding member that holds the packing 4 used in the present embodiment in a sealed state is formed in an annular shape from a flat plate made of synthetic resin. Four cutout portions 355, 355,... Are formed on the outer peripheral edge of the pressing member 351 at predetermined intervals. Further, the end surface on the rear end side of the presser member 351 has a tapered surface 352a that is inclined so as to be reduced in diameter toward the inner diameter direction, and the end surface on the front end side of the presser member 351 is orthogonal to the axial direction. It is a flat surface 352b.

図１２（ａ）に示されるように、各収容溝部３１０には、係止部材６がそれぞれ収容される。収容溝部３１０に係止部材６を収容した際には、収容溝部３１０における周方向の端部と係止部材６における周方向の端部との間に、弾性を有する部材から成る弾性部材３０４が配設される。この弾性部材３０４により収容溝部３１０での係止部材６の位置を保持させることで移動防止できるため、作業性が向上する。   As shown in FIG. 12A, the locking member 6 is housed in each housing groove 310. When the locking member 6 is stored in the storage groove 310, an elastic member 304 made of an elastic member is interposed between the circumferential end of the storage groove 310 and the circumferential end of the locking member 6. Arranged. Since the elastic member 304 can prevent the movement by holding the position of the locking member 6 in the accommodation groove portion 310, workability is improved.

図１２（ｂ）に示されるように、押え部材３５１は、切欠き部３５５，３５５，…を各収容溝部３１０に収容された係止部材６の鍔部７に合わせた状態で嵌合凹部３３０ａに配置される。これによれば、切欠き部３５５，３５５，…が鍔部７に当接することで押え部材３５１が周方向にずれることが規制される。また、押え部材３５１を嵌合凹部３３０ａに配置した際には、押え部材３５１の外周面が凸部３０２，３０２，…の内側に配置されることとなり、これにより押え部材３５１が径方向にずれることを防止できる。   As shown in FIG. 12 (b), the pressing member 351 has a fitting recess 330 a in a state where the notches 355, 355,... Are aligned with the flange 7 of the locking member 6 accommodated in each accommodation groove 310. Placed in. According to this, when the notch parts 355, 355, ... contact | abut on the collar part 7, it is controlled that the pressing member 351 shift | displaces to the circumferential direction. When the presser member 351 is disposed in the fitting recess 330a, the outer peripheral surface of the presser member 351 is disposed inside the convex portions 302, 302,..., Thereby causing the presser member 351 to shift in the radial direction. Can be prevented.

挿口管１と受口管２とを接続する際には、前記実施例と同様に、図１３（ａ）に示されるように、係止部材６，６，…及び押え部材３５１を取付けた押輪３０３とパッキン４とを挿口部１ａに外嵌させ、挿口部１ａを受口部２０の開口近傍に配置する。   When the insertion tube 1 and the reception tube 2 are connected, the locking members 6, 6,... And the presser member 351 are attached as shown in FIG. The push ring 303 and the packing 4 are fitted on the insertion portion 1 a and the insertion portion 1 a is disposed in the vicinity of the opening of the receiving portion 20.

次いで、図１３（ｂ）に示されるように、挿口部１ａを受口部２０に所定距離挿入し、押輪３０３を受口部２０に近接するように軸方向に移動すると、鍔部７が受口部２０の開口側端面２０ｄに当接し、係止部材６の受口部２０方向への移動が規制される。   Next, as shown in FIG. 13B, when the insertion portion 1 a is inserted into the receiving portion 20 by a predetermined distance and the pusher wheel 303 is moved in the axial direction so as to be close to the receiving portion 20, the flange portion 7 is moved. Abutting on the opening-side end surface 20d of the receiving portion 20, the movement of the locking member 6 in the direction of the receiving portion 20 is restricted.

次に、図１４（ａ）に示されるように、Ｔ頭ボルト８０とナット８５とを締め付けることで、押輪３０３を受口部２０側に更に移動させる。これにより、押え部材３５１がパッキン４を受口部２０側に押圧するように移動するとともに、収容溝部３１０のテーパ面３３０ｅと係止部材６の第１テーパ面６２との摺動により係止部材６の爪部６１，６１，…が挿口部１ａの外周面１ｂに食い込むようになる。また、押え部材３５１が押輪３０３と受口部２０の開口側端面２０ｄとで挟持されるようになるため、パッキン４による挿口部１ａと受口部２０との密封状態が保持される。   Next, as shown in FIG. 14A, the pusher wheel 303 is further moved to the receiving port 20 side by tightening the T-head bolt 80 and the nut 85. As a result, the holding member 351 moves so as to press the packing 4 toward the receiving port 20, and the locking member is moved by sliding between the tapered surface 330 e of the receiving groove 310 and the first tapered surface 62 of the locking member 6. The six claw portions 61, 61,... Bite into the outer peripheral surface 1b of the insertion portion 1a. Further, since the presser member 351 is sandwiched between the presser wheel 303 and the opening side end face 20d of the receiving portion 20, the sealed state between the insertion portion 1a and the receiving portion 20 by the packing 4 is maintained.

係止部材６及び鍔部７は、収容溝部３１０に収容されているため、係止部材６の受口部２０方向への移動が規制された状態で押輪３０３を受口部２０側に移動させた際には、収容溝部３１０に案内されることで好適に爪部６１，６１，…が挿口部１ａの外周面１ｂに食い込むようになる。また、係止部材６の収容溝部３１０での位置を保持する弾性部材３０４は、弾性変形可能であるため、係止部材６と収容溝部３１０との相対的に近接移動を阻害することを抑制できる。   Since the locking member 6 and the collar portion 7 are accommodated in the accommodation groove portion 310, the pusher wheel 303 is moved to the receiving portion 20 side in a state where movement of the locking member 6 in the direction of the receiving portion 20 is restricted. In this case, the claw portions 61, 61,... Are suitably bitten into the outer peripheral surface 1 b of the insertion portion 1 a by being guided by the housing groove portion 310. Further, since the elastic member 304 that holds the position of the locking member 6 in the receiving groove 310 can be elastically deformed, it is possible to suppress the relative proximity movement between the locking member 6 and the receiving groove 310 being inhibited. .

そして、図１４（ｂ）に示されるように、挿口部１ａを受口部２０から離脱する方向に地震等の不測の外力が作用した場合、この外力により、係止部材６をさらに挿口部１ａの外周面１ｂにさらに食い込ませることで楔効果と傾動効果を発揮し、挿口管１と受口管２との離脱を防止する。   Then, as shown in FIG. 14B, when an unexpected external force such as an earthquake is applied in a direction in which the insertion portion 1a is detached from the receiving portion 20, the locking member 6 is further inserted by the external force. The wedge effect and the tilting effect are exhibited by further biting into the outer peripheral surface 1b of the portion 1a, and the detachment of the insertion tube 1 and the receiving tube 2 is prevented.

次に、実施例４に係る離脱防止装置及び管継手につき、図１５〜図１７を参照して説明する。尚、前記実施例に示される構成部分と同一構成部分については同一符号を付して重複する説明を省略する。   Next, a separation preventing device and a pipe joint according to the fourth embodiment will be described with reference to FIGS. Note that the same components as those shown in the embodiment are given the same reference numerals and redundant description is omitted.

図１５に示されるように、本実施例に用いられる押輪４０３は、切欠き溝４０４の構成以外実施例１の押輪３と略同一構成となっている。押輪４０３は、先端側の端部における溝部３０ｇ，３０ｇ，…の外径側に切欠き溝４０４，４０４，…が形成されている。   As shown in FIG. 15, the pusher wheel 403 used in the present embodiment has substantially the same configuration as the pusher wheel 3 of the first embodiment except for the configuration of the notch groove 404. The push ring 403 has notches 404, 404,... Formed on the outer diameter side of the grooves 30g, 30g,.

挿口管１と受口管２とを接続する際には、図１６（ａ）に示されるように、フォルダユニット５（係止部材６’，６’，…、第１フォルダ部材５１及び第２フォルダ部材５６）を取付けた押輪４０３とパッキン４’とを挿口管１の挿口部１ａに外嵌させ、挿口部１ａを受口部２０の開口近傍に配置する。   When the insertion tube 1 and the receiving tube 2 are connected, as shown in FIG. 16A, the folder unit 5 (the locking members 6 ′, 6 ′,... The push ring 403 and the packing 4 ′ to which the two folder members 56) are attached are fitted on the insertion portion 1 a of the insertion tube 1, and the insertion portion 1 a is disposed in the vicinity of the opening of the receiving portion 20.

尚、本実施例で用いられるパッキン４’は、その底部４ｃ’側端部（受口部２０と反対側の端部）の内周側に切欠段部４ｄが形成されている。底部４ｃ’には、その内周縁である切欠段部４ｄと底部４ｃ’の外周縁とに亘って形成される環状のパッキン保持体１３が固着されている。さらに尚、本実施例で用いられる係止部材６’は、パッキン保持体１３の外周面よりも外径側に位置するように鍔部７’が形成されている。   The packing 4 ′ used in this embodiment has a notch step 4 d formed on the inner peripheral side of the bottom 4 c ′ side end (end opposite to the receiving port 20). An annular packing holder 13 is fixed to the bottom portion 4c 'so as to extend over the notch step portion 4d, which is the inner periphery thereof, and the outer periphery of the bottom portion 4c'. Further, the locking member 6 ′ used in the present embodiment is formed with a flange portion 7 ′ so as to be positioned on the outer diameter side with respect to the outer peripheral surface of the packing holder 13.

次いで、図１６（ｂ）に示されるように、挿口部１ａを受口部２０に所定距離挿入し、押輪４０３を受口部２０に近接するように軸方向に移動すると、鍔部７’が受口部２０の開口側端面２０ｄに当接し、係止部材６’の受口部２０方向への移動が規制される。   Next, as shown in FIG. 16B, when the insertion portion 1a is inserted into the receiving portion 20 for a predetermined distance and the push wheel 403 is moved in the axial direction so as to be close to the receiving portion 20, the collar portion 7 ' Comes into contact with the opening side end face 20d of the receiving portion 20, and the movement of the locking member 6 'in the direction of the receiving portion 20 is restricted.

次に、図１７（ａ）に示されるように、Ｔ頭ボルト８０とナット８５とを締め付けることで、押輪４０３を受口部２０側に移動させる。これにより、第１フォルダ部材５１がパッキン保持体１３及びパッキン４を受口部２０側に押圧するように移動するとともに、押輪３のテーパ面３３ｅと係止部材６’の第１テーパ面６２との摺動により係止部材６’の爪部６１，６１，…が挿口部１ａの外周面１ｂに食い込むようになる。   Next, as shown in FIG. 17A, the pusher wheel 403 is moved to the receiving port 20 side by tightening the T-head bolt 80 and the nut 85. As a result, the first folder member 51 moves so as to press the packing holder 13 and the packing 4 toward the receiving portion 20 side, and the tapered surface 33e of the pusher wheel 3 and the first tapered surface 62 of the locking member 6 ' , The claw portions 61, 61,... Of the locking member 6 ′ bite into the outer peripheral surface 1b of the insertion portion 1a.

また、押輪４０３は、前述した切欠き溝４０４が設けられていることにより、押輪４０３と受口部２０との近接移動が鍔部７’により阻害されない。これにより第１フォルダ部材５１は、押輪４０３と受口部２０の開口側端面２０ｄとで挟持されるようになるため、パッキン４’による挿口部１ａと受口部２０との密封状態が保持される。   Further, since the push wheel 403 is provided with the notch groove 404 described above, the proximity movement between the push wheel 403 and the receiving portion 20 is not hindered by the flange portion 7 ′. As a result, the first folder member 51 is sandwiched between the push wheel 403 and the opening-side end surface 20d of the receiving portion 20, so that the sealed state between the insertion portion 1a and the receiving portion 20 by the packing 4 'is maintained. Is done.

そして、図１７（ｂ）に示されるように、挿口部１ａを受口部２０から離脱する方向に地震等の不測の外力が作用した場合、この外力により、係止部材６’をさらに挿口部１ａの外周面１ｂにさらに食い込ませることで楔効果と傾動効果を発揮し、挿口管１と受口管２との離脱を防止する。   Then, as shown in FIG. 17B, when an unexpected external force such as an earthquake is applied in a direction in which the insertion portion 1a is detached from the receiving portion 20, the locking member 6 ′ is further inserted by this external force. The wedge effect and the tilting effect are exhibited by further biting into the outer peripheral surface 1b of the mouth portion 1a, and the detachment of the insertion tube 1 and the receiving tube 2 is prevented.

次に、実施例５に係る離脱防止装置及び管継手につき、図１８〜図２１を参照して説明する。尚、前記実施例に示される構成部分と同一構成部分については同一符号を付して重複する説明を省略する。   Next, a separation preventing device and a pipe joint according to the fifth embodiment will be described with reference to FIGS. Note that the same components as those shown in the embodiment are given the same reference numerals and redundant description is omitted.

図１８に示されるように、本実施例に用いられる押輪５０３は、切欠き溝５０４の構成以外実施例３の押輪３０３と略同一構成となっている。押輪５０３は、先端側の端部における溝部３３０ｇ，３３０ｇ，…の外径側に切欠き溝５０４，５０４，…が形成されている。   As shown in FIG. 18, the pusher wheel 503 used in the present embodiment has substantially the same configuration as the pusher wheel 303 of the third embodiment except for the configuration of the notch groove 504. The push ring 503 has notches 504, 504,... Formed on the outer diameter side of the grooves 330g, 330g,.

図１９に示されるように、本実施例に用いられるパッキン４を密封状態で保持する保持部材としての押え部材５５１は、合成樹脂製の平板材により環状に形成されている。この押え部材５５１の外周縁には、所定間隔を置いて４つの切欠き部５５５，５５５，…が形成されている。また、押え部材５５１の先端面及び後端面は平坦な面となっている。   As shown in FIG. 19, the pressing member 551 as a holding member that holds the packing 4 used in the present embodiment in a sealed state is formed in an annular shape from a flat plate made of synthetic resin. Four notches 555, 555,... Are formed on the outer peripheral edge of the pressing member 551 with a predetermined interval. Further, the front end surface and the rear end surface of the pressing member 551 are flat surfaces.

押え部材５５１における切欠き部５５５，５５５，…の近傍には、断面視Ｌ字状のスペーサ７０（介設体）が配設されている。このスペーサ７０は、押え部材５５１の後端部に配設される略円弧上の第１板部７１と、第１板部７１の周方向略中央部における外周縁から先端側（受口部２０側）に延びる第２板部７２と、から構成される。本変形例では、スペーサ７０は、第２板部７２が押え部材５５１の後端部に接着力の弱い接着層（図示せず）により仮貼着されている。尚、スペーサ７０は、押え部材５５１から分離可能であればよく、必ずしも押え部材５５１に貼着されていなくともよい。   In the vicinity of the notches 555, 555,... In the pressing member 551, a spacer 70 (intervening body) having an L-shape in cross section is disposed. The spacer 70 includes a first plate portion 71 on a substantially circular arc disposed at the rear end portion of the pressing member 551, and the outer peripheral edge at the substantially central portion in the circumferential direction of the first plate portion 71 (the receiving portion 20. And a second plate portion 72 extending to the side). In the present modification, the spacer 70 has the second plate portion 72 temporarily attached to the rear end portion of the pressing member 551 with an adhesive layer (not shown) having a weak adhesive force. The spacer 70 only needs to be separable from the presser member 551, and is not necessarily attached to the presser member 551.

挿口管１と受口管２とを接続する際には、前記実施例と同様に、図２０（ａ）に示されるように、係止部材５６０，５６０，…及び押え部材５５１を取付けた押輪５０３とパッキン４’とを挿口部１ａに外嵌させ、挿口部１ａを受口部２０の開口近傍に配置する。尚、本実施例で用いられる係止部材５６０は、鍔部に代えてスペーサ７０が構成されていること以外、前記実施例と略同一構成となっている。   When connecting the insertion tube 1 and the reception tube 2, as shown in FIG. 20 (a), the locking members 560, 560,... The press ring 503 and the packing 4 ′ are fitted to the insertion portion 1 a, and the insertion portion 1 a is disposed in the vicinity of the opening of the receiving portion 20. The locking member 560 used in this embodiment has substantially the same configuration as that of the above embodiment except that the spacer 70 is configured instead of the collar portion.

次いで、図２０（ｂ）に示されるように、挿口部１ａを受口部２０に所定距離挿入し、押輪５０３を受口部２０に近接するように軸方向に移動すると、スペーサ７０の第２板部７２が受口部２０の開口側端面２０ｄに当接し、これに伴い係止部材５６０の受口部２０方向への移動が規制される。   Next, as illustrated in FIG. 20B, when the insertion portion 1 a is inserted into the receiving portion 20 by a predetermined distance and the pusher wheel 503 is moved in the axial direction so as to be close to the receiving portion 20, the spacer 70 The two plate portions 72 come into contact with the opening-side end surface 20d of the receiving portion 20, and accordingly, the movement of the locking member 560 in the direction of the receiving portion 20 is restricted.

次に、図２１（ａ）に示されるように、Ｔ頭ボルト８０とナット８５とを締め付けることで、押輪５０３を受口部２０側に移動させる。これにより、押え部材５５１がスペーサ７０の第１板部７１から剥離されてパッキン保持体１３及びパッキン４’を受口部２０側に押圧するように移動するとともに、押輪５０３のテーパ面３３０ｅと係止部材５６０の第１テーパ面６２との摺動により係止部材５６０の爪部６１，６１，…が挿口部１ａの外周面１ｂに食い込むようになる。   Next, as shown in FIG. 21A, the pusher wheel 503 is moved to the receiving port 20 side by tightening the T-head bolt 80 and the nut 85. As a result, the pressing member 551 is peeled from the first plate portion 71 of the spacer 70 and moves so as to press the packing holder 13 and the packing 4 ′ toward the receiving portion 20, and is engaged with the tapered surface 330 e of the presser wheel 503. The claw portions 61, 61,... Of the locking member 560 bite into the outer peripheral surface 1b of the insertion portion 1a by sliding with the first tapered surface 62 of the stopping member 560.

また、押輪５０３は、前述した切欠き溝５０４が設けられていることにより、押輪５０３と受口部２０との近接移動がスペーサ７０により阻害されない。これにより押え部材５５１は、押輪５０３と受口部２０の開口側端面２０ｄとで挟持されるようになるため、パッキン４’による挿口部１ａと受口部２０との密封状態が保持される。   Further, the pusher wheel 503 is provided with the notch groove 504 described above, so that the proximity movement between the pusher wheel 503 and the receiving port 20 is not hindered by the spacer 70. As a result, the presser member 551 is sandwiched between the presser wheel 503 and the opening-side end surface 20d of the receiving portion 20, so that the sealed state between the insertion portion 1a and the receiving portion 20 by the packing 4 'is maintained. .

そして、図２１（ｂ）に示されるように、挿口部１ａを受口部２０から離脱する方向に地震等の不測の外力が作用した場合、この外力により、係止部材５６０をさらに挿口部１ａの外周面１ｂにさらに食い込ませることで楔効果と傾動効果を発揮し、挿口管１と受口管２との離脱を防止する。   Then, as shown in FIG. 21B, when an unexpected external force such as an earthquake acts in a direction in which the insertion portion 1a is detached from the receiving portion 20, the locking member 560 is further inserted by the external force. The wedge effect and the tilting effect are exhibited by further biting into the outer peripheral surface 1b of the portion 1a, and the detachment of the insertion tube 1 and the receiving tube 2 is prevented.

このように、スペーサ７０は、係止部材５６０と別体に形成されているため、挿口管１と受口管２とに離脱方向の外力が作用した際に、係止部材５６０を単独で押輪５０３に近接するように移動する。すなわち、挿口管１と受口管２とに離脱方向の外力が作用した際に、係止部材５６０が傾いたとしても、係止部材５６０の押輪５０３への近接移動がスペーサ７０により阻害されることを防止できる。   Thus, since the spacer 70 is formed separately from the locking member 560, when an external force in the detaching direction acts on the insertion tube 1 and the receiving tube 2, the locking member 560 is used alone. It moves so as to be close to the push wheel 503. In other words, even when the locking member 560 is tilted when an external force is applied to the insertion tube 1 and the receiving tube 2, the spacer 70 impedes the proximity movement of the locking member 560 to the push wheel 503. Can be prevented.

次に、実施例６に係る離脱防止装置及び管継手につき、図２２〜図２４を参照して説明する。尚、前記実施例に示される構成部分と同一構成部分については同一符号を付して重複する説明を省略する。   Next, a detachment preventing device and a pipe joint according to Embodiment 6 will be described with reference to FIGS. Note that the same components as those shown in the embodiment are given the same reference numerals and redundant description is omitted.

本実施例に用いられる押輪４０３は、前記実施例４と略同一構成となっている。また、図２２に示されるように、第１フォルダ部材５１の切欠き部５５，５５，…には、スペーサ７０’，７０’，…が取付けられている。詳しくは、スペーサ７０’は、切欠き部５５に嵌合する第１板部７１’と、第１板部７１’の外周縁から先端側（受口部２０側）に延びる第２板部７２’と、から構成されている。   The pusher wheel 403 used in this embodiment has substantially the same configuration as that of the fourth embodiment. 22, spacers 70 ′, 70 ′,... Are attached to the notches 55, 55,... Of the first folder member 51. Specifically, the spacer 70 ′ includes a first plate portion 71 ′ that fits into the notch portion 55, and a second plate portion 72 that extends from the outer peripheral edge of the first plate portion 71 ′ to the distal end side (receiving port portion 20 side). 'And consist of.

挿口管１と受口管２とを接続する際には、前記実施例と同様に、図２３（ａ）に示されるように、係止部材６６０，６６０，…、第１フォルダ部材５１及び第２フォルダ部材５６を取付けた押輪４０３とパッキン４’とを挿口部１ａに外嵌させ、挿口部１ａを受口部２０の開口近傍に配置する。尚、本実施例で用いられる係止部材６６０は、スペーサ７０’の第２板部７２’が嵌合される嵌合部６６０ａ以外、前記実施例５の係止部材６６０と略同一構成となっている。   When connecting the insertion tube 1 and the reception tube 2, as shown in FIG. 23 (a), the locking members 660, 660,. The push ring 403 and the packing 4 ′ to which the second folder member 56 is attached are externally fitted to the insertion portion 1 a, and the insertion portion 1 a is disposed near the opening of the receiving portion 20. The locking member 660 used in the present embodiment has substantially the same configuration as the locking member 660 of the fifth embodiment except for the fitting portion 660a into which the second plate portion 72 ′ of the spacer 70 ′ is fitted. ing.

次いで、図２３（ｂ）に示されるように、挿口部１ａを受口部２０に所定距離挿入し、押輪４０３を受口部２０に近接するように軸方向に移動すると、スペーサ７０’の第２板部７２’が受口部２０の開口側端面２０ｄに当接し、これに伴い係止部材６６０の受口部２０方向への移動が規制される。このとき、スペーサ７０’の第２板部７２’は、係止部材６６０の嵌合部６６０ａに嵌合されているため、係止部材６６０の受口部２０方向への移動を安定して規制できる。   Next, as shown in FIG. 23B, when the insertion portion 1a is inserted into the receiving portion 20 by a predetermined distance and the push wheel 403 is moved in the axial direction so as to be close to the receiving portion 20, the spacer 70 ' The second plate portion 72 ′ comes into contact with the opening side end surface 20d of the receiving portion 20, and the movement of the locking member 660 in the direction of the receiving portion 20 is restricted accordingly. At this time, since the second plate portion 72 ′ of the spacer 70 ′ is fitted to the fitting portion 660a of the locking member 660, the movement of the locking member 660 in the direction of the receiving portion 20 is stably regulated. it can.

次に、図２４（ａ）に示されるように、Ｔ頭ボルト８０とナット８５とを締め付けることで、押輪４０３を受口部２０側に移動させる。これにより、第１フォルダ部材５１がスペーサ７０’の第１板部７１’から剥離されてパッキン保持体１３及びパッキン４’を受口部２０側に押圧するように移動するとともに、押輪４０３のテーパ面３３ｅと係止部材６６０の第１テーパ面６２との摺動により係止部材６６０の爪部６１，６１，…が挿口部１ａの外周面１ｂに食い込むようになる。   Next, as shown in FIG. 24A, the pusher wheel 403 is moved to the receiving portion 20 side by tightening the T-head bolt 80 and the nut 85. Thereby, the first folder member 51 is peeled off from the first plate portion 71 ′ of the spacer 70 ′ and moved so as to press the packing holder 13 and the packing 4 ′ toward the receiving portion 20, and the taper of the pusher wheel 403 is moved. The claw portions 61, 61,... Of the locking member 660 bite into the outer peripheral surface 1b of the insertion portion 1a by sliding between the surface 33e and the first tapered surface 62 of the locking member 660.

また、押輪４０３は、前述した切欠き溝４０４が設けられていることにより、押輪４０３と受口部２０との近接移動がスペーサ７０’により阻害されない。これにより第１フォルダ部材５１は、押輪４０３と受口部２０の開口側端面２０ｄとで挟持されるようになるため、パッキン４’による挿口部１ａと受口部２０との密封状態が保持される。   Further, since the push wheel 403 is provided with the above-described notch groove 404, the proximity movement between the push wheel 403 and the receiving portion 20 is not hindered by the spacer 70 '. As a result, the first folder member 51 is sandwiched between the push wheel 403 and the opening-side end surface 20d of the receiving portion 20, so that the sealed state between the insertion portion 1a and the receiving portion 20 by the packing 4 'is maintained. Is done.

そして、図２４（ｂ）に示されるように、挿口部１ａを受口部２０から離脱する方向に地震等の不測の外力が作用した場合、この外力により、係止部材６６０をさらに挿口部１ａの外周面１ｂにさらに食い込ませることで楔効果と傾動効果を発揮し、挿口管１と受口管２との離脱を防止する。   Then, as shown in FIG. 24B, when an unexpected external force such as an earthquake acts in a direction in which the insertion portion 1 a is detached from the receiving portion 20, the locking member 660 is further inserted by this external force. The wedge effect and the tilting effect are exhibited by further biting into the outer peripheral surface 1b of the portion 1a, and the detachment of the insertion tube 1 and the receiving tube 2 is prevented.

以上、本発明の実施例を図面により説明してきたが、具体的な構成はこれら実施例に限られるものではなく、本発明の要旨を逸脱しない範囲における変更や追加があっても本発明に含まれる。   Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

例えば、本発明の一方及び他方の流路構成部材は、端部に受口部及び挿口部を有し流路を構成する部材であれば、必ずしも管に限らず、例えば内部に弁体を備えた弁筐体などであってもよい。   For example, one and the other flow path constituent members of the present invention are not limited to pipes as long as they have a receiving part and an insertion part at the end and constitute a flow path. It may be a valve housing provided.

また例えば、本実施例の押輪は、一体に形成されるものであるが、これに限らず分割構造としてもよい。   Further, for example, the push wheel of the present embodiment is formed integrally, but is not limited to this, and may have a divided structure.

１ 挿口管（他方の流路構成部材）
１ａ 挿口部
２ 受口管（一方の流路構成部材）
３ 押輪（本体部材）
４，４’ パッキン（シール部材）
６，６’ 係止部材
７，７’ 鍔部（介設体）
１０ 管継手
１１ 離脱防止装置
２０ 受口部
２０ｄ 開口側端面（受口部の端部）
３０ 挿通孔（本体部材の内周部）
３０ｇ 溝部（案内部）
３３ｅ テーパ面
５１ 第１フォルダ部材（保持部材）
５６ 第２フォルダ部材
６１ 爪部
６２ 第１テーパ面
７０，７０’ スペーサ（介設体）
２５０ フォルダ
２５１ 第１フォルダ部（保持部材）
２５６ 第２フォルダ部
３０３ 押輪（本体部材）
３１０ 収容溝部（本体部材の内周部）
３３０ｅ テーパ面
３５１ 押え部材（保持部材）
４０３ 押輪（本体部材）
５０３ 押輪（本体部材）
５５１ 押え部材（保持部材）
５６０ 係止部材
６６０ 係止部材 1 Inlet tube (other flow path component)
1a Insertion part 2 Receptor pipe (one flow path component)
3 Press wheel (main body member)
4,4 'packing (seal member)
6, 6 'locking member 7, 7' collar (intermediate body)
DESCRIPTION OF SYMBOLS 10 Pipe joint 11 Detachment prevention apparatus 20 Receiving part 20d Opening side end surface (end part of receiving part)
30 Insertion hole (inner peripheral part of main body member)
30g Groove (guide)
33e Tapered surface 51 First folder member (holding member)
56 2nd folder member 61 Claw part 62 1st taper surface 70,70 'Spacer (interposition body)
250 folder 251 first folder part (holding member)
256 Second folder portion 303 Presser wheel (main body member)
310 Housing groove (inner peripheral part of main body member)
330e Taper surface 351 Presser member (holding member)
403 Press wheel (main body member)
503 Press wheel (main body member)
551 Presser member (holding member)
560 Locking member 660 Locking member

Claims (5)

一方の流路構成部材の受口部にリング状のシール部材を介して他方の流路構成部材の挿口部を挿入し、密封状に接続される接続箇所に設けられ、前記流路構成部材同士の離脱を防止する離脱防止装置であって、
前記挿口部の外周面に外嵌され、前記外周面に対向する内周部を有する本体部材と、前記本体部材の内周部に収容され、前記本体部材により内径方向に押圧されることで前記挿口部の外周面に係止される係止部材と、前記係止部材及び前記シール部材の間に設けられ、前記シール部材を密封状態で保持する保持部材と、を少なくとも備え、
前記係止部材と、前記シール部材及び前記保持部材よりも外径側の前記受口部の端部との間に、前記係止部材の軸方向の進入を規制する介設体が設けられることを特徴とする離脱防止装置。 An insertion port of the other flow path component is inserted into a receiving portion of one flow path component through a ring-shaped seal member, and the flow path component is provided at a connection location connected in a sealed manner. A separation prevention device for preventing separation between each other,
A body member that has an inner peripheral portion that is externally fitted to the outer peripheral surface of the insertion portion and faces the outer peripheral surface, and is accommodated in the inner peripheral portion of the main body member, and is pressed in the inner diameter direction by the main body member. A locking member that is locked to an outer peripheral surface of the insertion portion, and a holding member that is provided between the locking member and the seal member and holds the seal member in a sealed state,
An interposed body is provided between the locking member and the end portion of the receiving portion on the outer diameter side of the sealing member and the holding member to restrict the axial entry of the locking member. Detachment prevention device characterized by. 前記介設体は、前記係止部材と一体に形成されていることを特徴とする請求項１に記載の離脱防止装置。   The separation preventing device according to claim 1, wherein the interposed body is formed integrally with the locking member. 前記介設体は、前記係止部材と別体に形成されていることを特徴とする請求項１に記載の離脱防止装置。   The separation preventing device according to claim 1, wherein the interposed body is formed separately from the locking member. 前記介設体は、前記係止部材の周方向の略中央部に設けられることを特徴とする請求項１ないし３のいずれかに記載の離脱防止装置。   The separation preventing device according to any one of claims 1 to 3, wherein the interposed body is provided at a substantially central portion in a circumferential direction of the locking member. 前記一方の流路構成部材である受口管と、前記他方の流路構成部材である挿口管と、前記シール部材と、請求項１ないし４のいずれかに記載の前記離脱防止装置と、を有することを特徴とする管継手。   The outlet tube as the one flow path component member, the insertion tube as the other flow path component member, the seal member, and the separation preventing device according to any one of claims 1 to 4, A pipe joint characterized by comprising:
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