JP7253608B2 - Separation prevention device and pipe joint equipped with this device - Google Patents

Separation prevention device and pipe joint equipped with this device Download PDF

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JP7253608B2
JP7253608B2 JP2021201931A JP2021201931A JP7253608B2 JP 7253608 B2 JP7253608 B2 JP 7253608B2 JP 2021201931 A JP2021201931 A JP 2021201931A JP 2021201931 A JP2021201931 A JP 2021201931A JP 7253608 B2 JP7253608 B2 JP 7253608B2
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locking member
socket
folder
prevention device
locking
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JP2022022461A (en
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芳則 前田
敏彦 小形
温志 佐藤
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Cosmo Koki Co Ltd
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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 connecting portion where a socket portion of one flow path constituting member is inserted into a socket portion of the other flow path constituting member, and a sealing connection is made via a ring-shaped sealing member. The present invention relates to a detachment prevention device for preventing detachment of flow path constituent members, and a pipe joint provided with 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 detachment prevention device for preventing detachment of flow path constituting members, a hook for engaging with the insertion opening is provided inside a body member externally fitted to the insertion opening constituting the flow path construction member. Together with a ring-shaped seal member that accommodates a stop member and is externally fitted on the end of the spigot portion and a holding member that holds it in a sealed state, it extends in the pipe axial direction toward the socket portion that is another flow path constituting member. 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 one in which one end of a push shaft extending in the pipe axial direction toward the inner surface of the socket is connected to a locking member housed inside the body member. When connecting to the receptacle in the pipe axial direction, the other end of the extruded shaft contacts the inner surface of the receptacle, and the supporting force obtained prevents the locking member from entering in the pipe axial direction along with the main body member. In this state, the tapered surface of the inner surface of the main body member further progressing in the pipe axial direction is utilized to push the locking member in the radial direction. There is a technique in which pressure is applied to lock the locking member to the receptacle (see, for example, Patent Document 1).

特開２００５－３０８１８２号公報（第４頁、第６図）Japanese Patent Application Laid-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 seal member for sealing the flow path forming member and a holding member for holding the seal member are formed with through holes for allowing the push shaft connected to the locking member to pass therethrough. This not only affects the sealing performance of the sealing member, but also the extruded shaft with a small shaft diameter cannot provide sufficient supporting force to restrict the movement of the locking member in the pipe axial direction, and the locking member is not supported by the pipe shaft. As a result of applying a combined pressing force in the direction and in the inner diameter direction, the locking member will not bite into the outer peripheral surface of the insertion opening, and the intended detachment prevention function will not be sufficiently exhibited. There is a problem that fear occurs.

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 in view of such problems, and provides a separation prevention device capable of sufficiently exhibiting a separation prevention function without affecting the sealing performance of a sealing member, and a pipe joint provided with this device. intended 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 problems, the detachment prevention device of the present invention includes:
The socket of one of the flow path forming members is inserted into the socket of the other flow path forming member via a ring-shaped sealing member, and is provided at a connection point where the connection is made in a sealed manner. A detachment prevention device that prevents detachment of each other,
A main body member fitted on the outer peripheral surface of the receptacle portion and having an inner peripheral portion opposed to the outer peripheral surface; At least a locking member that locks onto the outer peripheral surface of the receptacle, and a holding member that is provided between the locking member and the sealing member and holds the sealing member in a sealed state,
An intervening body is provided between the locking member and an end portion of the socket portion on the outer diameter side of the sealing member and the holding member for restricting the locking member from entering in the axial direction. is characterized by
According to this feature, the intervening body for restricting the axial entry of the locking member is provided between the locking member and the end of the socket on the outer diameter side of the sealing member and the holding member. Therefore, without affecting the sealing performance of the sealing member and the holding member, and in a state in which the axial pressing force applied to the locking member is cut off, the main body member exerts an inner pressing force on the locking member. As a result, the desired detachment prevention function of the locking member can be exhibited.

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 interposition body is characterized by being formed integrally with the locking member.
According to this feature, since the locking member is integrated with the interposing body, the locking member can be accurately locked to the predetermined position of the receptacle.

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 interposing body is characterized in that it is formed separately from the locking member.
According to this feature, since the locking member is separate from the interposition body, the locking member can be easily tilted independently with respect to the receptacle when an external force acts in the separating direction.

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 interposing body is characterized in that it is provided at a substantially central portion in the circumferential direction of the locking member.
According to this feature, it is possible to restrict entry of the locking member without being inclined with respect to the axial direction by the interposing 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 is characterized by having a socket pipe as one of the flow path constituent members, a spigot pipe as the other flow passage constituent member, the seal member, and the detachment prevention device.
According to this feature, it is possible to provide a pipe joint in which the locking member exerts the desired separation preventing function without affecting the sealing performance of the sealing member and the holding member.

実施例１における管継手を示す側断面図である。1 is a side cross-sectional view showing a pipe joint in Example 1. FIG. （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 a top view of a push ring and a view of the push ring from the rear end side in Example 1, and (b) is a cross-sectional view of the push ring along line AA and a view of the push ring from the front end side in Example 1. （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 a view of the first folder member viewed from the rear end side and a BB cross-sectional view, and (b) is a view of the second folder member viewed from the front end side and a CC cross-sectional view. （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 a schematic diagram showing assembly of the folder unit, (b) is a side sectional view showing the assembled folder unit, and (c) is a view of the locking member as seen 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 a side cross-sectional view showing a state in which the detachment prevention device and the receptacle portion are aligned with the receptacle portion according to the first embodiment; It is a sectional side view showing an inserted state. （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 side cross-sectional view showing a state in which the pressing ring in the first embodiment is brought close to the receiving portion, and (b) is a state in which the locking member and the insertion portion move in the disengagement direction from the state of (a). FIG. 10 is a side cross-sectional view showing a state in which （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 a view of the first folder part in Example 2 as seen from the rear end side, (b) is a view of the second folder part as seen from the front end side, and (c) is the folder DD. It is a sectional view. （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 a side cross-sectional view showing a state in which the detachment prevention device and the receptacle portion are aligned with the receptacle portion in Embodiment 2; It is a sectional side view showing an inserted state. （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 side cross-sectional view showing a state in which the push ring in the second embodiment is brought close to the receiving portion, and (b) is a state in which the locking member and the insertion portion move in the disengagement direction from the state of (a). FIG. 10 is a side cross-sectional view showing a state in which （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 a top view of a push ring and a view of the push ring from the rear end side in Example 3, and (b) is an EE cross-sectional view of the push ring in Example 3 and a view of the push 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 a view of the pressing member in Example 3 as seen from the rear end side, and (b) is a cross-sectional view taken along the line FF. （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 an explanatory view showing a state in which a locking member is attached to a pressing ring in Example 3, and (b) is an explanatory view showing a state in which a pressing member is attached 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 a side cross-sectional view showing a state in which the detachment prevention device and the receptacle portion are aligned with the receptacle portion in Embodiment 3; It is a sectional side view showing an inserted state. （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 side cross-sectional view showing a state in which the pressing ring in the third embodiment is brought close to the receiving portion, and (b) is a state in which the locking member and the insertion portion move in the disengagement direction from the state of (a). FIG. 10 is a side cross-sectional view showing a state in which （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 a top view of the push ring and a view of the push ring from the rear end side in Example 4, and (b) is a GG cross-sectional view of the push ring of Example 4 and a view of the push 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) is a side cross-sectional view showing a state in which the detachment prevention device and the receptacle portion are aligned with the receptacle portion in Embodiment 4; It is a sectional side view showing an inserted state. （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 side cross-sectional view showing a state in which the pressing ring in the fourth embodiment is brought close to the receiving portion, and (b) is a state in which the locking member and the insertion portion are moved in the disengagement direction from the state of (a). It is a side cross-sectional view showing a state in which it has been extended. （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 a top view of the push ring and a view of the push ring from the rear end side in Example 5, and (b) is an HH cross-sectional view of the push ring in Example 5 and a view of the push ring from the tip 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 a view of a state in which a spacer is attached to a pressing member in Example 5, viewed from the rear end side, and (b) is a cross-sectional view along JJ. （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) is a side cross-sectional view showing a state in which the detachment prevention device and the receptacle portion are aligned with the receptacle portion in Embodiment 5; It is a sectional side view showing an inserted state. （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 cross-sectional view showing a state in which the push ring in Example 5 is brought close to the receiving portion, and (b) is a state in which the locking member and the insertion portion are disengaged from the state of (a). FIG. 10 is a side cross-sectional view showing a state in which （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 a view of a state in which a spacer is attached to a first folder member in Example 6, viewed from the rear end side, and (b) is a KK cross-sectional view. （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) is a side cross-sectional view showing a state in which the detachment prevention device and the receptacle portion are aligned with the receptacle portion in Embodiment 6; It is a sectional side view showing an inserted state. （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 cross-sectional view showing a state in which the push ring in Embodiment 6 is brought close to the receiving portion, and (b) is a state in which the locking member and the insertion portion are disengaged from the state shown in (a). FIG. 10 is a side cross-sectional view showing a state in which

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。 Embodiments for implementing the detachment prevention device and the pipe joint provided with this device according to the present invention will be described below based on embodiments.

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。 A detachment prevention device and a pipe joint according to Embodiment 1 will be described with reference to FIGS. 1 to 6. FIG. The right side of FIG. 1 (the tip end side of the spigot tube) is defined as the front end side, and the left side of FIG. 1 is defined as 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 spigot pipe 1 (the other flow path constituent member) and the socket pipe 2 (the one flow passage constituent member) of this embodiment are, for example, a ductile for water supply buried underground. It is made of cast iron, and the inner peripheral surface of the pipeline section is covered with a mortar layer. The spigot pipe 1 and the socket pipe 2 according to the present invention may be made of metal such as cast iron or steel, or may be made of asbestos, concrete, vinyl chloride, polyethylene or polyolefin. Furthermore, the inner peripheral surfaces of the spigot tube 1 and the spigot tube 2 are not limited to the mortar layer, but may be coated with, for example, epoxy resin or the like, or the spigot tube 1 and the spigot tube 1 and the spigot tube 1 may be coated with an appropriate material by powder coating. The inner peripheral surface of the tube 2 may be coated. Further, the fluid in the spigot pipe 1 and the socket pipe 2 is not limited to tap water in this embodiment, but may be, for example, industrial water, agricultural water, sewage, gas, or a gas-liquid mixture of gas and liquid. It doesn't matter if there is.

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, a pipe joint 10 of this embodiment includes a spigot portion 1a formed at the end of a spigot pipe 1 and a spigot portion 1a formed at the end of a socket pipe 2 into which the spigot portion 1a is inserted. It is mainly composed of a receptacle portion 20 and a detachment prevention device 11 . Further, the detachment prevention device 11 is mainly composed of a push ring 3 (main body member) fitted around the outer peripheral surface 1b of the insertion opening 1a, an annular rubber packing 4 (seal member), and an annular folder unit 5. is configured to

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。 A plurality of flanges 25 (only one is shown in FIG. 1) are formed at predetermined intervals in the circumferential direction of the outer peripheral surface of the opening side end of the socket portion 20 . A through hole 28 is formed for connection with the flange 35 of the. A tapered surface 20c is formed on the inner peripheral surface of the receptacle portion 20, the diameter of which gradually decreases from the opening-side end toward the inside in the pipe axial direction. In addition, the flanges 25 and 35 may be formed integrally in the circumferential direction, instead of having 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 to be fitted around the outer peripheral surface 1b of the insertion opening 1a, and includes a tip portion 4a formed in a natural state with a substantially circular cross-sectional shape and a base portion 4b formed with a substantially trapezoidal cross-sectional shape. and a bottom portion 4c opposite to the 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 push ring 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. , a through hole 38 is formed in the axial direction. In addition, in the inner peripheral portion of the insertion hole 30 of the push ring 3 through which the insertion portion 1a is inserted, a fitting concave portion 30a and an accommodating recess 30a are provided in this order from the tip side of the insertion portion 1a (end portion side on the side of the socket portion 20). A portion 30b, a tapered portion 30c, and a small-diameter portion 30d are formed continuously (especially see the AA 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。 An annular portion 52 of a first folder member 51, which will be described later, can be fitted into the fitting recess 30a. The fitting recess 30a is formed such that substantially the entire surface thereof, except for the outer edge of the front end portion (the end portion on the socket portion 20 side) of the push ring 3, is recessed toward the rear end portion side.

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。 Locking members 6, 6, . . . , which will be described later, can be fitted into the accommodating portion 30b. Specifically, four grooves 30g, 30g, . Collar portions 7, 7, . . . of stopping members 6, 6, .

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 has a tapered surface 30e whose diameter gradually decreases from the accommodation portion 30b toward the small diameter portion 30d, and a rear end surface 30f rising in the radial direction from the end of the tapered surface 30e on the side of the small diameter portion 30d. The inner 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 opening 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 a first annular folder member 51, a second annular folder member 56 having an outer diameter smaller than that of the first folder member 51, a first folder member 51 and a second folder member 56. It is composed of four locking members 6, 6, . The first folder member 51 is arranged closer to the socket 20 than the locking member 6, and the second folder member 56 is arranged on the opposite side of the first folder member 51 with the locking member 6 interposed therebetween. there is

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 cylindrical portions protruding from the annular portion 52 at approximately right angles. 53, 53, . . . The annular portion 52 has a tapered surface 52a whose surface on the side of the cylindrical portions 53, 53, . . . They are flat surfaces 52b that are perpendicular to each other. Four notches 55, 55, . . .

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 has 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, which will be described later, can be fitted. The cylindrical portions 53, 53, . . .

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 outer diameter smaller than that of the annular portion 52 of the first folder member 51. are formed from four 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 sealing member 12 is attached to 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 this embodiment, the first folder member 51 and the second folder member 56 are provided with four cylindrical portions 53, 53, ... and four convex portions 58, 58, ..., respectively. It may be freely designed according to the number, 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 and 6 are placed between the first folder member 51 and the second folder member 56. 6, . . . are clamped (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. 4(c)), the locking member 6 has a substantially arc shape when viewed from the axial direction, and includes a plurality of substantially arc-shaped claw portions 61, 61, . 3) are formed in parallel on the inner diameter side, and a collar portion 7 (interposed body) protruding axially from the distal end portion of the outer peripheral edge of the base portion 60 at substantially the center in the circumferential direction of the base portion 60. , consists of The locking member 6 is made of ductile cast iron, other metals, or resin, and the collar portion 7 is integrally formed with the base portion 60 . That is, in this embodiment, the locking member 6 and the flange portion 7 as 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 rear end portion of the outer peripheral edge of the base portion 60 is provided with a first tapered surface 62 that tapers in the direction opposite to the flange portion 7 . In addition, a second tapered surface 63 that is inclined so as to be substantially parallel to the tapered surface 52a of the first folder member 51 is provided on the side surface of the base portion 60 on the tip side (end portion on the side of the first folder member 51). there is

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. 4(b), when the locking member 6 is sandwiched between the first folder member 51 and the second folder member 56, the The collar portion 7 is inserted into the notch portion 55 and locked. That is, the locking member 6 is held between the first folder member 51 and the second folder member 56 in a state where falling is restricted.

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 steps until the spigot pipe 1 and the socket pipe 2 are connected in a sealed state by the pipe joint 10 will be described in detail with reference to FIGS. 5 and 6. FIG.

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. 5(a), the folder unit 5 (locking members 6, 6, . The attached push ring 3 and packing 4 are fitted together. In the above state, most of the locking members 6, 6, . . . and the second folder member 56 are accommodated in the tapered portion 30c. More specifically, the outer peripheral surface of each collar portion 7 integrated with each locking member 6 is close to the inner peripheral surface of the housing portion 30b (groove portion 30g), and the first tapered surface 62 and the tapered portion of each locking member 6 are adjacent to each other. The tapered surface 30e of 30c comes into contact with the tapered surface 30e. That is, when the folder unit 5 is fitted to the insertion opening 1a, the locking members 6 are arranged closer to the accommodating portion 30b and the tapered portion 30c of the pressing ring 3, so that the claws of the locking members 6 are displaced. The portions 61, 61, .

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。 . are attached in the push ring 3 while being held by the first folder member 51 and the second folder member 56. Therefore, when the engaging members 6, 6, . . , … 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 through hole 38 of the press ring 3 and the through hole 28 of the socket portion 20 are aligned with each other, and the T-head bolt 80 is inserted into the through holes 38 and 28, and the nut 85 is attached to the axis of the T-head bolt 80. Temporarily fasten 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. 5B, after inserting the spigot portion 1a into the socket portion 20 by a predetermined amount, the pressing ring 3, the folder unit 5, and the packing 4 are brought close to the socket portion 20. Move axially. Then, the tip portion 4a of the packing 4 is pressed between the outer peripheral surface 1b of the receptacle portion 1a and the inner peripheral surface of the receptacle portion 20. As shown in FIG. As described above, the receptacle portion 20 is formed with the tapered surface 20c that expands in diameter toward the opening side. 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 spigot portion 1a is inserted into the socket portion 20 by a predetermined distance and the push ring 3 is moved in the axial direction so as to approach the socket portion 20, the end surface 7a of the flange portion 7 is aligned with the opening side end surface 20d of the socket portion 20 ( (end portion of the receptacle portion), and the movement of the locking member 6 toward the receptacle portion 20 is restricted. When the end surface 7a of the flange portion 7 abuts against the opening-side end surface 20d of the socket portion 20, the pressing ring 3 and the flange 25 of the socket portion 20 are separated from each other with an insertion allowance left. 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 face 7a of the collar portion 7 and the opening side end face 20d of the socket portion 20 rise in a direction perpendicular to the axial direction, the end face 7a of the collar portion 7 and the opening side end face 20d of the socket portion 20 When the engaging member 6 is in face contact, movement toward the receptacle portion 20 can be restricted without tilting the engaging member 6 with respect to the receptacle 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。 In addition, since the flange portion 7 abuts on the opening-side end surface 20d of the socket portion 20, which has a higher strength than the packing 4, the first folder member 51, etc., the locking member 6 is prevented from moving toward the socket portion 20. Stable and regulated.

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 flange portion 7 is provided at a substantially central portion in the circumferential direction of the locking member 6 , when the flange portion 7 abuts against the opening-side end face 20 d of the socket portion 20 , the locking member 6 does not move. It is possible to suppress the biased force from acting. Specifically, since the reaction force generated when the flange portion 7 comes into contact with the opening-side end face 20d of the socket portion 20 can be transmitted substantially evenly to the entire locking member 6, the circumferential direction of the locking member 6 can be reduced. It is possible to suppress the unbalanced load that tends to rotate in the radial direction or the axial direction around the end side of the.

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。 Further, since the flange portion 7 is accommodated in the groove portion 30g of the pressing ring 3, displacement of the flange portion 7 is restricted when inserting the insertion portion 1a into the socket portion 20. As shown in FIG. That is, since the flange portion 7 is guided by the groove portion 30g of the pressing ring 3, the locking member 6 can be moved toward the socket portion 20 without causing the flange portion 7 to bias against the opening-side end surface 20d of the socket portion 20. can be suitably regulated.

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, by tightening the T-head bolt 80 and the nut 85, the push ring 3 is further moved toward the socket 20 side. As described above, the locking member 6 is restricted from moving toward the socket 20 by the surface contact between the flange 7 and the opening-side end face 20d of the socket 20. Accordingly, the second folder 6 is held in place. The member 56 stays on the rear side of the locking member 6 without moving.

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 annular portion 52 of the first folder member 51 moves so as to press the bottom portion 4c of the packing 4 toward the socket portion 20 side as the pressing ring 3 moves toward the socket portion 20 side. As a result, the base portion 4b of the packing 4 is pressed against the tapered surface 20c of the receptacle portion 20 and the outer peripheral surface of the receptacle portion 1a, and the space between the receptacle portion 1a and the receptacle portion 20 is sealed. Further, since the annular portion 52 of the first folder member 51 is sandwiched between the pressing ring 3 and the opening-side end surface 20d of the socket portion 20, the packing 4 seals the socket portion 1a and the socket portion 20. state is preserved.

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, only the first folder member 51 arranged closer to the socket 20 than the locking member 6 moves toward the socket 20, and the movement of the second folder member 56 is restricted. 51 and the second folder member 56 move away from each other and are separated from each other. Specifically, the projections 58, 58, . . . of the second folder member 56 slide within the recesses 53c, 53c, . The connection interval with the second folder member 56 is widened. Therefore, the tapered surface 52a of the first folder member 51 and the second tapered surface 63 of the locking member 6 are separated from each other by the 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 pressing ring 3 moves toward the receiving portion 20 while the movement of the locking member 6 toward the receiving portion 20 is restricted, the first tapered surface 62 of the locking member 6 and the tapered surface 30e of the pressing ring 3 slides, thereby pressing the locking member 6 radially inward. In other words, the movement of the push ring 3 toward the socket portion 20 is converted into a pressing force that presses the locking member 6 in the radial direction due to the sliding between the first tapered surface 62 and the tapered surface 30e. The claw portions 61, 61, . . . bite into the outer peripheral surface 1b of the insert portion 1a. Since the claws 61, 61, . Effective biting can be achieved while preventing the risk of making insertion difficult due to contact with the inner peripheral side of the receptacle portion 30, and biting concentrates on the claw portion 61 on the rear end side of the claw portions 61, 61, . , to achieve the desired initial state encroachment.

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 manner, the flange portion 7 that restricts the axial entry of the locking member 6 is positioned between the locking member 6 and the opening side end surface of the receptacle portion 20 on the outer diameter side of the packing 4 and the first folder member 51 . 20d, the locking member 6 and the flange 7 do not come into direct contact with the packing 4. As shown in FIG. Therefore, it is possible to prevent the packing 4 held by the first folder member 51 from affecting the sealing performance, and suppress the inclination of the locking member 6 so that the locking member 6 can perform the intended function of preventing detachment. 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。 Since the flange portion 7 does not come into direct contact with the packing 4, the degree of freedom in designing the shape and size of the flange portion 7 is increased. area can be increased. As a result, the movement of the locking member 6 to the receptacle portion 20 can be stably restricted.

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。 In addition, since the flange portion 7 is formed integrally with the locking member 6, the locking member 6 can be accurately locked to a predetermined position on the outer peripheral surface 1b of the insert portion 1a. Specifically, since the collar portion 7 is integrally formed with the locking member 6 , the reaction force generated when the collar portion 7 abuts the opening-side end surface 20 d of the socket portion 20 is applied to the locking member 6 . Since the pressing force that presses the locking member 6 in the radial direction is not dispersed, the locking member 6 can be accurately locked to the outer peripheral surface 1b of the spigot 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 in which the inclination of the locking member 6 is restricted, the claw portions 61, 61, . . . It comes to bite into the outer peripheral surface 1b of 1a substantially uniformly. In other words, it is possible to prevent the claw portions 61, 61, . . .

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. 6(b), a case where an unexpected external force such as an earthquake acts in the direction of separating the spigot portion 1a from the socket portion 20 will be described. This external force causes the locking member 6 to move away from the receptacle 20 together with the receptacle 1a. Specifically, the tapered surface 52a of the first folder member 51 and the second tapered surface 63 of the locking member 6 are axially separated by a dimension L2 larger than the dimension L1 (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。 Since the locking member 6 moves away from the socket 20 together with the receptacle 1a in this manner, the locking member 6 is further pushed radially inward by the tapered surface 30e of the push ring 3, and the claws are pressed. The portion 61 further bites into the outer peripheral surface 1b of the insert portion 1a. At this time, the claw portion 61 bites in due to the wedge effect and the tilting effect of the locking member 6 centering on the rear end portion side claw portion 61, and exerts an effective detachment preventing force. Since the biting force is concentrated on the claw portion 61 in the initial state, the tip portion side claw portion 61 does not bite excessively due to the tilting of the locking member 6, and the claw portions 61, 61, . It is possible to suppress the influence on the pipe inner peripheral surface (for example, mortar layer) while exhibiting the effect. Since the cutting edge of the claw portion 61 of the locking member 6 is inclined with respect to the radial direction (the direction perpendicular to the axial direction) so as to face the socket portion 20 side, the locking member 6 is positioned at the insertion portion 1a. A wedge effect in the separating direction from the receptacle 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 spigot portion 1a moves in the direction away from the socket portion 20, the sealing member 12 is squeezed between the annular portion 57 of the second folder member 56 and the rear end surface 30f of the pressing ring 3, and the pressing ring 3 and the spigot are pressed together. Between the part 1a is sealed. Furthermore, even when the locking member 6 is moved, the first folder member 51 does not move and continues to hold the packing 4, so that 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 30g of the push ring 3, when a force to rotate the insertion tube 1 in the circumferential direction is applied, the locking member 6 is restricted by the groove 30g. Rotation of the spigot 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 this embodiment, an embodiment using four locking members 6 has been exemplified, but the present invention is not limited to this, and the number of locking members is appropriately adjusted according to the outer diameter of the insertion port. can be changed. Furthermore, the locking member 6 is provided with three claw portions 61, 61, . . . The shape can also 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。 In addition, in this embodiment, since the spigot pipe 1 and the socket pipe 2 made of ductile cast iron are used, a plurality of locking members 6 are used in order to enhance the separation prevention function. And when the socket pipe is made of synthetic resin such as vinyl chloride, polyethylene, or polyolefin, one locking member may be used which is continuous in the circumferential direction so as to form a substantially C-shape 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, a detachment prevention device and a pipe joint according to a second embodiment will be described with reference to FIGS. 7 to 9. FIG. The same reference numerals are assigned to the same components as those of the above-described embodiment, and redundant explanations are 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) arranged on the front end side of the locking member 6 and a second folder portion 251 (holding member) arranged on the rear end side of the locking member 6 . It mainly comprises a folder portion 256 and a plurality of connecting portions 253, 253, . . . connecting the first folder portion 251 and the second folder portion 256. The first folder portion 251, the second folder portion 256 and the connecting portions 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 portion 251 has an annular shape, and has four cutout portions 55, 55, . . . The second folder portion 256 has an annular shape with an outer diameter smaller than the outer diameter of the first folder portion 251, and the surface of the second folder portion 256 on the first folder portion 251 side has a protrusion. Portions 256a, 256a, .

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。 Eight connecting portions 253, 253, . . . are provided in this embodiment. there is The locking member 6 can be accommodated between the pair of connecting portions 253 , 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。 Further, the connecting portion 253 includes a plate-like portion 253a and a bulging portion 253b projecting toward the other connecting portion 253 forming a pair. The bulging portions 253b are fitted into recesses (not shown) formed at both ends of the locking member 6 in the circumferential direction. is accommodated, the locking member 6 can be prevented from moving in the circumferential direction.

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。 In addition, the plate-like portion 253a is designed so that it can be broken or stretched by applying a predetermined tensile force or more in the axial direction (the direction in which the first folder portion 251 and the second folder portion 256 are separated from each other). are 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 connecting the spigot tube 1 and the receptacle tube 2, as shown in FIG. 8(a), locking members 6, 6, . The pressing ring 3 to which the folder 250 is attached is fitted to the packing 4, and the insertion opening 1a is arranged in the vicinity of the opening of the receiving opening 20. As shown in FIG. When the locking members 6, 6, . . . are attached to the folder 250, the protrusions 256a, 256a, . . That is, the locking members 6, 6, . . . are held against the folder 250 without falling.

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), the spigot portion 1a is inserted into the socket portion 20 by a predetermined distance, and when the push ring 3 is moved in the axial direction so as to approach the socket portion 20, the flange portion 7 is It abuts against the opening-side end face 20d of the receptacle portion 20, and the movement of the locking member 6 toward the receptacle 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, by tightening the T-head bolt 80 and the nut 85, the push ring 3 is further moved toward the socket 20 side. As a result, the first folder portion 251 and the second folder portion 256 move apart from each other, so that the plate-like portion 253a (vulnerable portion) of each connecting portion 253 is broken or elongated, and the engaging portion 253a is broken. The claw portions 61, 61, . . . At this time, since the first folder portion 251 is sandwiched between the pressing ring 3 and the opening-side end surface 20d of the socket portion 20, the sealed state between the socket portion 1a and the socket portion 20 by the packing 4 is maintained. be.

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. 9(b), when an unexpected external force such as an earthquake acts in the direction of separating the insertion portion 1a from the socket portion 20, this external force further pushes the locking member 6 into the insertion portion. By further biting into the outer peripheral surface 1b of the portion 1a, the wedge effect and the tilting effect are exhibited, and the separation of the spigot tube 1 and the socket 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 detachment prevention device and a pipe joint according to a third embodiment will be described with reference to FIGS. 10 to 14. FIG. The same components as those shown in the above embodiments are denoted by the same reference numerals, and overlapping descriptions are 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 this embodiment has an insertion hole 330 through which the insertion opening 1a is inserted. A plurality of grooves 310 are formed spaced apart in the circumferential direction (four in this embodiment). The housing groove portion 310 is composed of a housing portion 330 b for housing the base portion 60 of the locking member 6 and a groove portion 330 g for housing the collar 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。 A fitting recess 330a and a plurality of projections 302 for holding a pressing member 351, which will be described later, are formed at the tip of the pressing ring 3. As shown in FIG. The plurality of protrusions 302 are arranged at predetermined intervals so as to form a generally annular shape when viewed from the front. A small diameter portion 330d is formed at the rear end portion of the push ring 3. As shown in FIG.

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 accommodation portion 330b has a tapered surface 330e whose diameter gradually decreases from the accommodation portion 330b toward the small diameter portion 330d, and a rear end surface 330f rising in the radial direction from the end of the tapered surface 330e on the side of the small diameter portion 330d. .

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, a holding member 351 as a holding member for holding the packing 4 used in this embodiment in a sealed state is formed in a circular shape from a synthetic resin plate material. Four notches 355, 355, . . . The end surface of the pressing member 351 on the rear end side has a tapered surface 352a that is inclined so as to decrease in diameter toward the inner diameter 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. 12( a ), each accommodation groove 310 accommodates the locking member 6 . When the locking member 6 is housed in the housing groove 310 , an elastic member 304 made of an elastic member is provided between the circumferential end of the housing groove 310 and the circumferential end of the locking member 6 . are placed. The elastic member 304 holds the position of the locking member 6 in the housing groove 310, thereby preventing movement, thereby improving workability.

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 is fitted with the notch portions 355, 355, . . . placed in According to this, the notch portions 355, 355, . Further, when the pressing member 351 is arranged in the fitting recess 330a, the outer peripheral surface of the pressing member 351 is arranged inside the convex portions 302, 302, . 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 connecting the spigot tube 1 and the socket tube 2, as shown in FIG. 13(a), locking members 6, 6, . . . The press ring 303 and the packing 4 are fitted over the spigot portion 1 a , and the spigot portion 1 a is arranged near the opening of the socket 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. 13(b), the spigot portion 1a is inserted into the socket portion 20 by a predetermined distance, and when the pressing ring 303 is moved in the axial direction so as to approach the socket portion 20, the flange portion 7 is It abuts against the opening-side end face 20d of the receptacle portion 20, and the movement of the locking member 6 toward the receptacle 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. 14(a), the T-head bolt 80 and the nut 85 are tightened to move the push ring 303 further toward the socket 20 side. As a result, the pressing member 351 moves so as to press the packing 4 toward the receptacle 20 side, and the sliding between the tapered surface 330e of the housing groove 310 and the first tapered surface 62 of the locking member 6 causes the locking member to move. The claw portions 61, 61, . . . Further, since the pressing member 351 is sandwiched between the pressing ring 303 and the opening-side end face 20d of the receptacle 20, the sealed state between the receptacle 1a and the receptacle 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 engaging member 6 and the flange portion 7 are accommodated in the accommodation groove portion 310, the push ring 303 is moved toward the socket portion 20 while the movement of the engaging member 6 toward the socket portion 20 is restricted. . . are preferably guided by the housing groove portion 310 so that the claw portions 61, 61, . . . In addition, since the elastic member 304 that holds the position of the locking member 6 in the housing groove 310 is elastically deformable, it is possible to prevent the locking member 6 and the housing groove 310 from interfering with the relative movement toward each other. .

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. 14(b), when an unexpected external force such as an earthquake acts in the direction of separating the insertion portion 1a from the socket portion 20, this external force further pushes the locking member 6 into the insertion portion. By further biting into the outer peripheral surface 1b of the portion 1a, the wedge effect and the tilting effect are exhibited, and the separation of the spigot tube 1 and the socket 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 disconnection prevention device and a pipe joint according to a fourth embodiment will be described with reference to FIGS. 15 to 17. FIG. The same components as those shown in the above embodiments are denoted by the same reference numerals, and overlapping descriptions are 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 push ring 403 used in this embodiment has substantially the same configuration as the push ring 3 of the first embodiment except for the configuration of the notch groove 404 . The pressing ring 403 has notch grooves 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 connecting the spigot tube 1 and the socket tube 2, as shown in FIG. 2. The pressing ring 403 to which the folder member 56) is attached and the packing 4' are fitted over the spigot portion 1a of the spigot tube 1, and the spigot portion 1a is arranged near the opening of the socket portion 20. As shown in FIG.

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 stepped portion 4d formed on the inner peripheral side of the end portion on the side of the bottom portion 4c' (the end portion on the side opposite to the receptacle portion 20). An annular packing retainer 13 is fixed to the bottom portion 4c' so as to cover the cutout stepped portion 4d, which is the inner peripheral edge of the bottom portion 4c', and the outer peripheral edge of the bottom portion 4c'. Furthermore, the locking member 6 ′ used in the present embodiment has a collar portion 7 ′ formed so as to be located on the outer diameter side of 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. 16(b), the spigot portion 1a is inserted into the socket portion 20 by a predetermined distance, and the pressing ring 403 is moved in the axial direction so as to approach the socket portion 20, whereby the collar portion 7' is opened. contacts the opening side end face 20d of the socket portion 20, and movement of the engaging member 6' toward the socket 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 T-head bolt 80 and the nut 85 are tightened to move the press ring 403 toward the socket 20 side. As a result, the first folder member 51 moves so as to press the packing holder 13 and the packing 4 toward the receptacle 20, and the tapered surface 33e of the pressing ring 3 and the first tapered surface 62 of the locking member 6' move. . . of the engaging member 6' bites into the outer peripheral surface 1b of the insertion opening 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 pressing ring 403 is provided with the notch groove 404 described above, the close movement between the pressing ring 403 and the socket portion 20 is not hindered by the flange portion 7'. As a result, the first folder member 51 is sandwiched between the pressing ring 403 and the opening-side end surface 20d of the receptacle portion 20, so that the sealed state between the receptacle portion 1a and the receptacle portion 20 is maintained by the packing 4'. be 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. 17(b), when an unexpected external force such as an earthquake acts in the direction of separating the insertion portion 1a from the socket portion 20, this external force further inserts the locking member 6'. By further biting into the outer peripheral surface 1b of the mouth portion 1a, a wedge effect and a tilting effect are exhibited, and separation of the spigot pipe 1 and the socket pipe 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 disconnection prevention device and a pipe joint according to a fifth embodiment will be described with reference to FIGS. 18 to 21. FIG. The same components as those shown in the above embodiments are denoted by the same reference numerals, and overlapping descriptions are 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 pressing ring 503 used in this embodiment has substantially the same configuration as the pressing ring 303 of the third embodiment except for the configuration of the notch groove 504 . The push ring 503 has notch grooves 504, 504, . . .

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, a pressing member 551 as a holding member for holding the packing 4 used in this embodiment in a sealed state is formed annularly from a synthetic resin plate material. Four notches 555, 555, . . . 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。 A spacer 70 (interposed body) having an L-shaped cross section is arranged in the vicinity of the cutout portions 555, 555, . . . The spacer 70 includes a substantially arc-shaped first plate portion 71 disposed at the rear end portion of the pressing member 551 , and a distal end portion (receptacle portion 20 side), and a second plate portion 72 extending to the side). In this modification, the second plate portion 72 of the spacer 70 is temporarily attached to the rear end portion of the pressing member 551 with an adhesive layer (not shown) having a weak adhesive force. Note that the spacer 70 need only be separable from the pressing member 551 and does not necessarily have to be adhered to the pressing 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 spigot tube 1 and the socket tube 2, locking members 560, 560, . . . The press ring 503 and the packing 4' are fitted over the receptacle portion 1a, and the receptacle portion 1a is arranged in the vicinity of the opening of the receptacle portion 20. As shown in FIG. The locking member 560 used in this embodiment has substantially the same structure as that of the previous embodiment, except that the spacer 70 is provided in place of the flange.

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 shown in FIG. 20(b), inserting the spigot portion 1a into the socket portion 20 by a predetermined distance, and moving the pressing ring 503 in the axial direction so as to approach the socket portion 20, The second plate portion 72 comes into contact with the opening-side end face 20d of the socket portion 20, thereby restricting the movement of the locking member 560 toward the socket portion 20. As shown in FIG.

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. 21(a), the T-head bolt 80 and the nut 85 are tightened to move the push ring 503 toward the socket 20 side. As a result, the pressing member 551 is separated 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 socket portion 20 side, and engages with the tapered surface 330 e of the pressing ring 503 . By sliding against the first tapered surface 62 of the stop member 560, the claw portions 61, 61, . . .

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。 In addition, since the pressing ring 503 is provided with the notch groove 504 described above, the spacer 70 does not hinder the approaching movement between the pressing ring 503 and the socket portion 20 . As a result, the pressing member 551 is sandwiched between the pressing ring 503 and the opening-side end surface 20d of the receptacle portion 20, so that the sealed state between the receptacle portion 1a and the receptacle portion 20 is maintained by the packing 4'. .

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. 21(b), when an unexpected external force such as an earthquake acts in a direction in which the receptacle portion 1a is separated from the receptacle portion 20, this external force further pushes the locking member 560 into the receptacle portion. By further biting into the outer peripheral surface 1b of the portion 1a, the wedge effect and the tilting effect are exhibited, and the separation of the spigot tube 1 and the socket 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。 As described above, the spacer 70 is formed separately from the locking member 560, so that when an external force acts on the insertion tube 1 and the receiving tube 2 in the separating direction, the locking member 560 can be held alone. Move closer to the push ring 503 . That is, even if the locking member 560 is tilted when an external force acts on the insertion tube 1 and the socket tube 2 in the separating direction, the movement of the locking member 560 toward the push ring 503 is blocked by the spacer 70 . 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 prevention device and a pipe joint according to a sixth embodiment will be described with reference to FIGS. 22 to 24. FIG. The same components as those shown in the above embodiments are denoted by the same reference numerals, and overlapping descriptions are 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。 A push ring 403 used in this embodiment has substantially the same configuration as that in the fourth embodiment. 22, spacers 70', 70', . . . are attached to the notch portions 55, 55, . 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 tip side (toward the socket portion 20). ' and consists 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 socket tube 2, as shown in FIG. 23(a), locking members 660, 660, . The pressing ring 403 to which the second folder member 56 is attached and the packing 4' are fitted over the insertion opening 1a, and the insertion opening 1a is arranged near the opening of the receiving opening 20. As shown in FIG. The locking member 660 used in this 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. 23(b), the insert 1a is inserted into the socket 20 by a predetermined distance, and the pressing ring 403 is axially moved so as to approach the socket 20, thereby removing the spacer 70'. The second plate portion 72' comes into contact with the opening-side end face 20d of the socket portion 20, thereby restricting the movement of the locking member 660 toward the socket portion 20. As shown in FIG. At this time, since the second plate portion 72' of the spacer 70' is fitted in the fitting portion 660a of the locking member 660, the movement of the locking member 660 toward the socket portion 20 is stably restricted. 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. 24(a), the T-head bolt 80 and the nut 85 are tightened to move the push ring 403 toward the socket 20 side. As a result, the first folder member 51 is separated 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 socket portion 20, and the taper of the pressing ring 403 is released. Due to the sliding between the surface 33e and the first tapered surface 62 of the locking member 660, the claw portions 61, 61, .

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。 In addition, since the pressing ring 403 is provided with the notch groove 404 described above, the close movement of the pressing ring 403 and the socket portion 20 is not hindered by the spacer 70'. As a result, the first folder member 51 is sandwiched between the pressing ring 403 and the opening-side end surface 20d of the receptacle portion 20, so that the sealed state between the receptacle portion 1a and the receptacle portion 20 is maintained by the packing 4'. be 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. 24(b), when an unexpected external force such as an earthquake acts in the direction of separating the insertion portion 1a from the socket portion 20, this external force further pushes the locking member 660 into the insertion portion. By further biting into the outer peripheral surface 1b of the portion 1a, the wedge effect and the tilting effect are exhibited, and the separation of the spigot tube 1 and the socket 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 above with reference to the drawings, the specific configuration is not limited to these embodiments, and any changes or additions within the scope of the present invention are included in the present invention. be

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, the one and the other flow path constituting members of the present invention are not necessarily limited to pipes as long as they have a socket and a spigot at their ends and constitute a flow path. The valve housing etc. which were provided may be used.

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 ring of the present embodiment is integrally formed, but it is not limited to this and may be of a split 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 spigot tube (the other flow path constituent member)
1a spigot part 2 socket pipe (one flow path constituent member)
3 push ring (body member)
4, 4' packing (seal member)
6, 6' Locking member 7, 7' Flange (interposed body)
10 Pipe joint 11 Separation prevention device 20 Socket portion 20d Opening side end face (end portion of socket portion)
30 insertion hole (inner periphery of main body member)
30g groove (guide)
33e Tapered surface 51 First folder member (holding member)
56 Second folder member 61 Claw portion 62 First tapered surfaces 70, 70' Spacer (interposed body)
250 folder 251 first folder part (holding member)
256 second folder part 303 push ring (body member)
310 accommodation groove (inner circumference of main body member)
330e taper surface 351 pressing member (holding member)
403 push ring (body member)
503 push ring (body member)
551 pressing member (holding member)
560 locking member 660 locking member

Claims (10)

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複数の係止部材と、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、前記保持部材と別体で且つ該保持部材に対し相対移動可能に形成されており、前記介設体は、前記受口部の開口側端面と面当接する端面を有していることを特徴とする離脱防止装置。 The socket of one of the flow path forming members is inserted into the socket of the other flow path forming member via a ring-shaped sealing member, and is provided at a connection point where the connection is made in a sealed manner. A detachment prevention device that prevents detachment of each other,
A main body member fitted on the outer peripheral surface of the receptacle portion and having an inner peripheral portion opposed to the outer peripheral surface; At least a plurality of locking members that are locked to the outer peripheral surface of the receptacle, and a holding member that is provided between the locking member and the sealing member and holds the sealing member in a sealed state,
An intervening body for restricting axial entry of the locking member is provided between the locking member and an end portion of the receptacle portion on the outer diameter side of the sealing member and the holding member. It is separate from the member and formed to be relatively movable with respect to the holding member , and the interposing body has an end face that is in surface contact with the opening side end face of the socket part. prevention device. 前記介設体の前記端面及び前記受口部の前記開口側端面は、前記流路構成部材の軸方向に対して直交する方向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。 2. The detachment according to claim 1, wherein the end surface of the interposing body and the opening side end surface of the socket are formed in a direction perpendicular to the axial direction of the flow path forming member. prevention device. 前記係止部材及び前記保持部材は、互いに面当接するテーパ面を有していることを特徴とする請求項１または２に記載の離脱防止装置。 3. The detachment prevention device according to claim 1, wherein the locking member and the holding member have tapered surfaces that come into surface contact with each other. 前記係止部材を挟んだ前記保持部材の反対側に、該保持部材とともにフォルダユニットを構成する第２フォルダ部材が配置されてい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。 4. The detachment according to any one of claims 1 to 3, wherein a second folder member forming a folder unit together with the holding member is arranged on the opposite side of the holding member with the locking member interposed therebetween. prevention device. 前記係止部材は、前記保持部材と前記第２フォルダ部材との間に落下が規制された状態で保持されることを特徴とする請求項４に記載の離脱防止装置。 5. The detachment prevention device according to claim 4, wherein the locking member is held between the holding member and the second folder member in a state in which falling is restricted. 前記係止部材は、前記保持部材に形成された切欠き部に挿入される鍔部を有していることを特徴とする請求項５に記載の離脱防止装置。 6. The detachment prevention device according to claim 5, wherein the locking member has a flange portion that is inserted into a notch portion formed in the holding member. 前記鍔部は、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前記開口側端面との間に設けられていることを特徴とする請求項６に記載の離脱防止装置。 7. The flange according to claim 6, wherein the flange is provided between the locking member and the opening-side end surface of the receptacle on the outer diameter side of the sealing member and the holding member. Detachment prevention device as described. 前記本体部材若しくは前記係止部材に、該係止部材を内径方向に押圧するテーパ面が形成されていることを特徴とする請求項１ないし７のいずれかに記載の離脱防止装置。 8. The detachment prevention device according to claim 1, wherein the main body member or the locking member is formed with a tapered surface that presses the locking member in an inner diameter direction. 前記本体部材及び前記係止部材に、互いに摺動することで前記係止部材を内径方向に押圧するテーパ面が形成されていることを特徴とする請求項８に記載の離脱防止装置。 9. The detachment prevention device according to claim 8, wherein the main body member and the locking member are formed with tapered surfaces that press the locking member inwardly by sliding against each other. 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９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。 a socket pipe that is one of the flow path constituent members, a spigot pipe that is the other flow passage constituent member, the seal member, and the detachment prevention device according to any one of claims 1 to 9; A pipe joint characterized by having
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