JP2017180472A - Pipe joint and method for connecting pipe - Google Patents

Pipe joint and method for connecting pipe Download PDF

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JP2017180472A
JP2017180472A JP2016062927A JP2016062927A JP2017180472A JP 2017180472 A JP2017180472 A JP 2017180472A JP 2016062927 A JP2016062927 A JP 2016062927A JP 2016062927 A JP2016062927 A JP 2016062927A JP 2017180472 A JP2017180472 A JP 2017180472A
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seal member
port
receiving port
pipe
protrusion
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JP6735123B2 (en
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石原　孝浩
Takahiro Ishihara
孝浩 石原
正吾 金子
Shogo Kaneko
正吾 金子
一也 伊東
Kazuya Ito
一也 伊東
翔太 山田
Shota Yamada
翔太 山田
勇喜 稗田
Yuki Hieda
勇喜 稗田
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Kubota Corp
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Kubota Corp
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Priority to US16/088,482 priority patent/US11384875B2/en
Priority to CN201780020516.4A priority patent/CN108884955B/en
Priority to PCT/JP2017/008701 priority patent/WO2017169531A1/en
Priority to TW106109780A priority patent/TWI628386B/en
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Abstract

PROBLEM TO BE SOLVED: To provide a pipe joint of which size can be made small in a pipe axis direction.SOLUTION: This invention relates to a pipe joint 1 in which an insertion port 5 of the other pipe 3 is inserted into a receiving port 4 of one pipe 2, an annular seal member 7 is arranged at a clearance between an outer peripheral surface of the insertion port 5 and an inner peripheral surface of the receiving port 4, a pushing ring 8 for pushing the seal member 7 to a deep side of the receiving port 4 is outwardly fitted to the insertion port 5 to be oppositely faced from outside against an opening end part of the receiving port 4. The insertion port 5 has an insertion port protrusion part 9 at its outer peripheral part. A removal prevention member 10 engaged with the insertion port protrusion part 9 in a pipe axis direction to prevent the insertion port 5 from being removed from the receiving port 4 is arranged between the inner periphery of the pushing ring 8 and an outer periphery of the insertion port 5, the seal member 7 has a compression part 16 that is held by the outer peripheral surface of the insertion port 5 and the inner peripheral surface of the receiving port 4 and compressed in a pipe diameter direction and at the same time positioned at an outer periphery of the insertion port protrusion part 9, and the compression part 16 of the seal member 7 is positioned at the deep side of the receiving port 4 rather than the insertion port protrusion part 9.SELECTED DRAWING: Figure 1

Description

本発明は、管を接合するのに使用される管継手および管の接合方法に関する。   The present invention relates to a pipe joint used for joining pipes and a pipe joining method.

従来、この種の管継手としては、図１９に示すように、一方の管１０１の端部に形成された受口１０２の内部に、他方の管１０３の端部に形成された挿口１０４が挿入され、挿口１０４の外周面と受口１０２の内周面との隙間に環状のシール部材１０５が設けられ、シール部材１０５を受口１０２の奥側へ押す押輪１０６が挿口１０４に外嵌されて受口１０２の開口端部に外側から対向するように構成されているものがある。   Conventionally, as this type of pipe joint, as shown in FIG. 19, an insertion port 104 formed at the end of the other tube 103 is provided inside the receiving port 102 formed at the end of one tube 101. The annular seal member 105 is inserted in the gap between the outer peripheral surface of the insertion port 104 and the inner peripheral surface of the receiving port 102, and a push ring 106 that pushes the seal member 105 to the back side of the receiving port 102 is attached to the insertion port 104. Some are configured to be fitted and face the opening end of the receiving port 102 from the outside.

挿口１０４は外周部に挿口突部１０７を有している。また、管軸方向において挿口突部１０７に係合して、挿口１０４が受口１０２から離脱するのを防止する環状のロッキング部材１０８が、押輪１０６の内周と挿口１０４の外周との間に設けられている。   The insertion opening 104 has an insertion protrusion 107 on the outer periphery. In addition, an annular locking member 108 that engages with the insertion protrusion 107 in the tube axis direction and prevents the insertion opening 104 from being detached from the receiving opening 102 includes an inner periphery of the push ring 106 and an outer periphery of the insertion opening 104. It is provided between.

管軸方向において、挿口突部１０７は、シール部材１０５から、挿口１０４の離脱方向Ａへ離間している。また、押輪１０６と受口１０２とは複数のボルト、ナット１０９で連結されており、押輪１０６はロッキング部材１０８を介してシール部材１０５を受口１０２の奥側へ押す。   In the tube axis direction, the insertion projection 107 is separated from the seal member 105 in the separation direction A of the insertion port 104. Further, the push ring 106 and the receiving opening 102 are connected by a plurality of bolts and nuts 109, and the push ring 106 pushes the seal member 105 to the back side of the receiving opening 102 via the locking member 108.

これによると、挿口１０４と受口１０２との間がシール部材１０５でシールされているため、管１０１,１０３内の流体が挿口１０４と受口１０２との間から漏出するのを防止できる。また、シール部材１０５はロッキング部材１０８を介して押輪１０６により受口１０２の奥側へ押されているため、管１０１,１０３内の流体圧等によってシール部材１０５が受口１０２の外部へ押し出されるのを防止できる。   According to this, since the gap between the insertion opening 104 and the receiving opening 102 is sealed by the sealing member 105, it is possible to prevent the fluid in the pipes 101 and 103 from leaking between the insertion opening 104 and the receiving opening 102. . Further, since the seal member 105 is pushed to the back side of the receiving port 102 by the pusher wheel 106 via the locking member 108, the seal member 105 is pushed out of the receiving port 102 by the fluid pressure in the pipes 101 and 103. Can be prevented.

また、地震等によって挿口１０４に離脱力が作用しても、挿口突部１０７が離脱方向Ａからロッキング部材１０８に係合することにより、挿口１０４が受口１０２から離脱するのを防止することができる。   Further, even when a detachment force acts on the insertion slot 104 due to an earthquake or the like, the insertion slot 104 is prevented from being detached from the receiving slot 102 by engaging the insertion projection 107 with the locking member 108 from the separation direction A. can do.

尚、上記のような管継手１００は例えば下記特許文献１に記載されている。   In addition, the above pipe joint 100 is described in the following patent document 1, for example.

特開２０１５−１４３５２４JP2015-143524A

しかしながら上記の従来形式では、管継手１００を介して管１０１,１０３同士を接合した状態では、挿口突部１０７がシール部材１０５から挿口１０４の離脱方向Ａへ離間しているため、挿口１０４の先端部から挿口突部１０７までの長さＬ１が長くなる。挿口１０４の先端部から挿口突部１０７までの部分が受口１０２に挿入されるため、これに応じて、受口１０２の開口端部から受口１０２内の奥端１１０までの長さＬ２も長くなり、管軸方向において受口１０２ひいては管継手１００が大型化するといった問題がある。   However, in the above conventional type, in the state where the pipes 101 and 103 are joined to each other through the pipe joint 100, the insertion port protrusion 107 is separated from the seal member 105 in the separation direction A of the insertion port 104. The length L1 from the front end portion of 104 to the insertion projection 107 becomes longer. Since the part from the front-end | tip part of the insertion port 104 to the insertion protrusion 107 is inserted in the receiving port 102, according to this, the length from the opening edge part of the receiving port 102 to the back end 110 in the receiving port 102 L2 also becomes long, and there is a problem that the receiving port 102 and thus the pipe joint 100 are enlarged in the pipe axis direction.

本発明は、管軸方向において小型化することが可能な管継手および管の接合方法を提供することを目的とする。   An object of this invention is to provide the pipe joint which can be reduced in size in a pipe-axis direction, and the joining method of a pipe | tube.

上記目的を達成するために、本第１発明は、一方の管に形成された受口の内部に、他方の管に形成された挿口が挿入され、
挿口の外周面と受口の内周面との隙間に環状のシール部材が設けられ、
シール部材を受口の奥側へ押す押輪が挿口に外嵌されて受口の開口端部に外側から対向する管継手であって、
挿口は外周部に挿口突部を有し、
管軸方向において挿口突部に係合して、挿口が受口から離脱するのを防止する離脱防止部材が、押輪の内周と挿口の外周との間に設けられ、
シール部材は、挿口の外周面と受口の内周面とに挟まれて管径方向に圧縮される圧縮部を有するとともに、挿口突部の外周に位置しており、
シール部材の圧縮部が挿口突部よりも受口の奥側に位置するものである。 To achieve the above object, according to the first aspect of the present invention, an insertion port formed in the other tube is inserted into a receiving port formed in one tube,
An annular seal member is provided in the gap between the outer peripheral surface of the insertion port and the inner peripheral surface of the receiving port,
A push ring that pushes the seal member to the back side of the receiving port is fitted to the insertion port and faces the opening end of the receiving port from the outside,
The insertion opening has an insertion protrusion on the outer periphery,
A separation preventing member that engages with the insertion protrusion in the tube axis direction and prevents the insertion opening from being removed from the receiving opening is provided between the inner periphery of the push wheel and the outer periphery of the insertion opening.
The seal member has a compression portion that is sandwiched between the outer peripheral surface of the insertion port and the inner peripheral surface of the receiving port and is compressed in the pipe diameter direction, and is located on the outer periphery of the insertion port protrusion.
The compression part of a sealing member is located in the back | inner side of a receiving port rather than the insertion protrusion.

これによると、管継手を介して管同士を接合した状態では、シール部材が挿口突部の外周に位置しているため、シール部材の位置と挿口突部の位置とが管径方向において重複し、挿口の先端部から挿口突部までの長さが短縮される。これにより、受口の開口端部から受口内の奥端までの長さを短縮することができ、管軸方向において管継手が小型化される。   According to this, in the state where the pipes are joined together via the pipe joint, the seal member is located on the outer periphery of the insertion protrusion, so the position of the seal member and the position of the insertion protrusion are in the pipe radial direction. It overlaps and the length from the front-end | tip part of an insertion port to an insertion protrusion is shortened. Thereby, the length from the opening edge part of a receptacle to the back end in a receptacle can be shortened, and a pipe joint is reduced in size in a pipe axis direction.

本第２発明における管継手は、シール部材の内周に、挿口突部が挿口の挿入方向から入り込む第１凹部が形成され、
第１凹部は、管軸方向において、シール部材の圧縮部よりも挿口の離脱方向側に存在しているものである。 In the pipe joint according to the second aspect of the present invention, a first recess is formed in the inner periphery of the seal member so that the insertion projection protrudes from the insertion direction of the insertion port,
A 1st recessed part exists in the detachment | leave direction side of an insertion port rather than the compression part of a sealing member in a pipe-axis direction.

これによると、シール部材を挿口に外嵌し、挿口をシール部材に対して挿入方向へ移動して、挿口突部を第１凹部に挿入することにより、シール部材を容易に挿口突部の外周に位置させることができる。   According to this, the sealing member can be easily inserted by inserting the sealing member into the insertion opening, moving the insertion opening in the insertion direction with respect to the sealing member, and inserting the insertion protrusion into the first recess. It can be located on the outer periphery of the protrusion.

本第３発明における管継手は、離脱防止部材は、一箇所が切断された一つ割り構造の環状の部材であり、押輪の内周と挿口の外周との間に設けられた離脱防止本体部と、挿口突部に係合可能な係合部とを有し、
係合部は離脱防止本体部から挿口の挿入方向に突出し、
係合部の管径方向における肉厚が離脱防止本体部の管径方向における肉厚よりも薄いものである。 In the pipe joint according to the third aspect of the present invention, the separation preventing member is an annular member having a one-piece structure in which one part is cut, and a separation preventing main body provided between the inner periphery of the push ring and the outer periphery of the insertion opening. And an engaging portion engageable with the insertion projection,
The engaging part protrudes from the separation preventing main body part in the insertion direction of the insertion opening,
The wall thickness in the tube diameter direction of the engaging portion is thinner than the wall thickness in the tube diameter direction of the separation preventing main body portion.

これによると、一方の管と他方の管とを接合する際、離脱防止部材の径を拡大（拡径）し、離脱防止部材を、挿口の先端から挿口に外嵌し、挿口突部を通過して、挿口突部よりも挿口の離脱方向側へ移動させ、その後、拡径していた離脱防止部材の径を縮小（縮径）して、離脱防止部材を挿口の外周に抱き付かせる。   According to this, when joining one pipe and the other pipe, the diameter of the separation preventing member is enlarged (expanded), and the separation preventing member is externally fitted from the distal end of the insertion opening to the insertion opening. Is moved to the detachment direction side of the insertion opening from the insertion protrusion, and then the diameter of the separation preventing member that has been expanded is reduced (reduced), and the separation preventing member is moved to the insertion opening. Hold it around the periphery.

離脱防止部材は係合部の肉厚が離脱防止本体部の肉厚よりも薄いため、離脱防止部材の強度が高くなり過ぎず、これにより、管接合時、離脱防止部材を拡径するのに要する力が低減され、離脱防止部材の拡径作業の手間が軽減されて、管の接合作業を短時間で行える。   The separation prevention member has a thickness of the engaging portion that is thinner than the thickness of the separation prevention main body portion, so that the strength of the separation prevention member does not become too high, thereby increasing the diameter of the separation prevention member during pipe joining. The required force is reduced, the labor for expanding the diameter of the separation preventing member is reduced, and the pipe can be joined in a short time.

このようにして一方の管と他方の管とを接合した後、地震等によって挿口に離脱力が作用しても、挿口突部が離脱方向から離脱防止部材の係合部に係合することにより、挿口が受口から離脱するのを防止することができる。   After joining one tube and the other tube in this way, even if a detachment force acts on the insertion port due to an earthquake or the like, the insertion port protrusion engages with the engagement portion of the separation preventing member from the separation direction. As a result, the insertion opening can be prevented from being detached from the receiving opening.

尚、離脱防止部材の取付姿勢を安定させるためには、管軸方向における離脱防止部材の幅を大きくすることが好ましく、この場合であっても、上記のように離脱防止部材の拡径作業の手間が軽減されて、管の接合作業を短時間で行える。   In order to stabilize the mounting posture of the separation preventing member, it is preferable to increase the width of the separation preventing member in the tube axis direction. Even in this case, the diameter of the separation preventing member can be increased as described above. The labor is reduced, and the pipe can be joined in a short time.

本第４発明における管継手は、係合部が挿口の挿入方向からシール部材の第１凹部に入り込んでおり、
挿口突部は、管軸方向において、シール部材の圧縮部と離脱防止部材の係合部との間に位置するものである。 In the pipe joint according to the fourth aspect of the present invention, the engaging portion enters the first recess of the seal member from the insertion direction of the insertion port,
The insertion protrusion is located between the compression portion of the seal member and the engagement portion of the separation preventing member in the tube axis direction.

これによると、離脱防止部材の係合部は挿口の挿入方向からシール部材の第１凹部に入り込んでいるため、シール部材の一端部が管径方向の内側へ変形し難くなり、シール部材の形状が安定するので、シール性（水密性）の低下を防止することができる。   According to this, since the engaging portion of the separation preventing member enters the first recess of the seal member from the insertion direction of the insertion opening, one end portion of the seal member is difficult to be deformed inward in the tube diameter direction, and the seal member Since the shape is stable, it is possible to prevent a decrease in sealing performance (watertightness).

本第５発明における管継手は、シール部材と押輪との間にスペーサが設けられ、
シール部材はスペーサを介して押輪により受口の奥側へ押され、
スペーサは、シール部材に当接する側に、第２凹部を有しており、
シール部材の一端部がスペーサの第２凹部に嵌め込まれているものである。 In the pipe joint according to the fifth invention, a spacer is provided between the seal member and the push ring,
The seal member is pushed to the back side of the receiving port by a push ring through a spacer,
The spacer has a second recess on the side in contact with the seal member,
One end of the seal member is fitted in the second recess of the spacer.

これによると、シール部材はスペーサを介して押輪により受口の奥側へ押されているため、管内の流体圧等によってシール部材が受口の外部へ押し出されるのを防止できる。
この際、シール部材の一端部がスペーサの第２凹部に嵌め込まれているため、シール部材の一端部が拡径方向へ過剰に変形（移動）するのを防止することができる。これにより、管継手を介して管同士を接合する際、シール部材の一端部が受口の開口端面とスペーサとの間に挟まれることはなく、シール部材を挿口の外周面と受口の内周面との間に確実に挿入することができる。 According to this, since the seal member is pushed to the back side of the receiving port by the pusher wheel via the spacer, it is possible to prevent the seal member from being pushed out of the receiving port by the fluid pressure in the pipe.
At this time, since one end portion of the seal member is fitted in the second recess of the spacer, it is possible to prevent the one end portion of the seal member from being excessively deformed (moved) in the diameter expansion direction. Thereby, when joining pipes via a pipe joint, one end of the seal member is not sandwiched between the opening end surface of the receiving port and the spacer, and the sealing member is inserted between the outer peripheral surface of the insertion port and the receiving port. It can be reliably inserted between the inner peripheral surface.

本第６発明は、上記第１発明から第５発明のいずれか１項に記載の管継手を用いた管の接合方法であって、
押輪を挿口に外嵌して挿口突部よりも挿口の離脱方向側へ移動させ、
離脱防止部材を、挿口に外嵌して挿口突部よりも挿口の離脱方向側へ移動させ、押輪の内周と挿口の外周との間に配置し、
シール部材を挿口に外嵌して挿口突部の外周に位置させ、
押輪でシール部材を押しながら挿口を受口内に挿入するものである。 The sixth invention is a method of joining pipes using the pipe joint according to any one of the first to fifth inventions,
The press ring is externally fitted to the insertion opening, and moved from the insertion protrusion to the detachment direction side of the insertion opening,
The detachment preventing member is externally fitted to the insertion opening and moved to the detachment direction side of the insertion opening from the insertion opening protrusion, and is arranged between the inner periphery of the push wheel and the outer periphery of the insertion opening,
The seal member is externally fitted to the insertion port, and is positioned on the outer periphery of the insertion port protrusion.
The insertion port is inserted into the receiving port while pushing the seal member with a push ring.

これによると、挿口を受口内に挿入する際、シール部材の圧縮部が挿口の先端と受口内の奥端との間に挟まれてしまうといった装着不良や、シール部材を十分に受口内に挿入することができないといった装着不良の発生を防止することができる。   According to this, when the insertion port is inserted into the receiving port, the compression part of the sealing member is sandwiched between the distal end of the insertion port and the inner end of the receiving port, or the sealing member is sufficiently inserted into the receiving port. It is possible to prevent the occurrence of a mounting failure such that it cannot be inserted into the housing.

以上のように本発明によると、管継手を介して管同士を接合した状態では、シール部材が挿口突部の外周に位置しているため、シール部材の位置と挿口突部の位置とが管径方向において重複し、挿口の先端部から挿口突部までの長さが短縮される。これにより、受口の開口端部から受口内の奥端までの長さを短縮することができ、管軸方向において管継手が小型化される。   As described above, according to the present invention, in a state where the pipes are joined to each other via the pipe joint, the seal member is positioned on the outer periphery of the insertion protrusion, and therefore the position of the seal member and the position of the insertion protrusion Are overlapped in the tube diameter direction, and the length from the distal end of the insertion opening to the insertion protrusion is reduced. Thereby, the length from the opening edge part of a receptacle to the back end in a receptacle can be shortened, and a pipe joint is reduced in size in a pipe axis direction.

本発明の第１の実施の形態における管継手の断面図である。It is sectional drawing of the pipe joint in the 1st Embodiment of this invention. 同、管継手の一部拡大断面図である。It is a partially expanded sectional view of a pipe joint. 同、管継手のシール部材の断面図であり、管継手に取り付けられていない自然状態での形状を示している。It is sectional drawing of the sealing member of a pipe joint, and shows the shape in the natural state which is not attached to a pipe joint. 同、管継手のロックリングの図である。It is a figure of the lock ring of a pipe joint. 図４におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 同、管継手の押輪の図である。It is a figure of the push ring of a pipe joint. 図６におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 同、管継手のスペーサの図である。It is a figure of the spacer of a pipe joint similarly. 図８におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 同、管継手のスペーサの一部拡大断面図である。It is a partial expanded sectional view of the spacer of a pipe joint similarly. 同、管継手を用いた管同士の接合方法を示す断面図である。It is sectional drawing which shows the joining method of the pipes using a pipe joint similarly. 管継手を用いて管同士を接合する際の装着不良の一例を示す参考図である。It is a reference figure showing an example of mounting failure at the time of joining pipes using a pipe joint. 管継手を用いて管同士を接合する際の装着不良の別の例を示す参考図である。It is a reference figure which shows another example of the mounting defect at the time of joining pipes using a pipe joint. 本発明の第２の実施の形態における管継手のシール部材の断面図であり、管継手に取り付けられていない自然状態での形状を示している。It is sectional drawing of the sealing member of the pipe joint in the 2nd Embodiment of this invention, and has shown the shape in the natural state which is not attached to the pipe joint. 同、管継手のスペーサの断面図である。It is sectional drawing of the spacer of a pipe joint similarly. 同、管継手の断面図である。It is sectional drawing of a pipe joint similarly. 同、管継手の一部拡大断面図である。It is a partially expanded sectional view of a pipe joint. 同、管継手を用いた管同士の接合方法を示す断面図である。It is sectional drawing which shows the joining method of the pipes using a pipe joint similarly. 従来の管継手の断面図である。It is sectional drawing of the conventional pipe joint.

以下、本発明における実施の形態を、図面を参照して説明する。
（第１の実施の形態）
第１の実施の形態では、図１,図２に示すように、１は一方の管２（異形管又は直管）と他方の管３（異形管又は直管）とを接続する管継手であり、一方の管２の端部に形成された受口４に、他方の管３の端部に形成された挿口５が挿入されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
In the first embodiment, as shown in FIGS. 1 and 2, reference numeral 1 denotes a pipe joint that connects one pipe 2 (deformed pipe or straight pipe) and the other pipe 3 (deformed pipe or straight pipe). There is an insertion port 5 formed at the end of the other tube 3 inserted into the receiving port 4 formed at the end of one tube 2.

挿口５の外周面と受口４の内周面との隙間に環状のシール部材７が設けられ、シール部材７を受口４の奥側へ押す押輪８が、挿口５に外嵌されて、受口４の開口端部に外側から対向している。   An annular seal member 7 is provided in the gap between the outer peripheral surface of the insertion port 5 and the inner peripheral surface of the receiving port 4, and a push ring 8 that pushes the seal member 7 to the back side of the receiving port 4 is fitted over the insertion port 5. Then, it faces the opening end of the receiving port 4 from the outside.

受口４は開口端部にフランジ６を有している。
挿口５は、外周部に、挿口突部９を全周にわたり有している。また、管軸方向において挿口突部９に係合して、挿口５が受口４から離脱するのを防止するロックリング１０（離脱防止部材の一例）が、押輪８の内周と挿口５の外周との間に設けられている。また、シール部材７と押輪８との間にはスペーサ１１が設けられている。 The receiving port 4 has a flange 6 at the opening end.
The insertion slot 5 has an insertion projection 9 on the entire outer periphery. Further, a lock ring 10 (an example of a detachment preventing member) that engages with the insertion projection 9 in the tube axis direction and prevents the insertion port 5 from being detached from the receiving port 4 is inserted into the inner periphery of the push wheel 8. It is provided between the outer periphery of the mouth 5. A spacer 11 is provided between the seal member 7 and the push wheel 8.

シール部材７は、ゴム（弾性材）製の円環状の部材であり、挿口突部９の外周側に位置している。図３はシール部材７を管継手１に取り付けていない自然な状態での形状を示す断面図であり、シール部材７は、受口４へ押し込まれる際に先端となる箇所において断面円形に形成された圧縮部１６と、圧縮部１６から押輪８に近付く方向に形成された基部１７とを有している。尚、基部１７は圧縮部１６よりも硬質のゴムで形成されている。   The seal member 7 is an annular member made of rubber (elastic material), and is located on the outer peripheral side of the insertion projection 9. FIG. 3 is a cross-sectional view showing a shape in a natural state in which the seal member 7 is not attached to the pipe joint 1, and the seal member 7 is formed in a circular cross section at a position that becomes a tip when being pushed into the receiving port 4. And a base portion 17 formed in a direction approaching the push wheel 8 from the compression portion 16. The base portion 17 is made of a harder rubber than the compression portion 16.

図１,図２に示すように、圧縮部１６は、挿口突部９よりも受口４の奥側に位置して、受口４の内周面と挿口５の外周面とに挟まれて管径方向に圧縮されている。
基部１７の外周は挿口５の離脱方向Ａほど拡径するテーパー状に形成されている。基部１７の内周には、挿口突部９が挿口５の挿入方向Ｂから入り込む第１凹部１８が形成されている。第１凹部１８は、管軸方向において、圧縮部１６よりも挿口５の離脱方向Ａ側に存在しており、基部１７の内径ｄよりも大きな内径ｄ１を有している。 As shown in FIGS. 1 and 2, the compression unit 16 is located on the back side of the receiving port 4 with respect to the insertion port protrusion 9 and is sandwiched between the inner peripheral surface of the receiving port 4 and the outer peripheral surface of the insertion port 5. And compressed in the pipe diameter direction.
The outer periphery of the base portion 17 is formed in a taper shape whose diameter increases in the direction A in which the insertion opening 5 is detached. On the inner periphery of the base portion 17, a first recess 18 is formed in which the insertion port protrusion 9 enters from the insertion direction B of the insertion port 5. The first recess 18 is present on the side of the insertion direction 5 of the insertion opening 5 with respect to the compression portion 16 in the tube axis direction, and has an inner diameter d1 larger than the inner diameter d of the base portion 17.

図１,図２,図４,図５に示すように、ロックリング１０は、一箇所が切断された一つ割り構造の円環状の金属製の部材であり、押輪８の内周と挿口５の外周との間に嵌まり込んだリング本体部２１（離脱防止本体部の一例）と、挿口突部９に係合可能な係合部２２とを有している。係合部２２は、リング本体部２１から挿口５の挿入方向Ｂに突出して、シール部材７の第１凹部１８の内周面と挿口５の外周面との間に入り込んでいる。   As shown in FIGS. 1, 2, 4, and 5, the lock ring 10 is a ring-shaped metal member having a single-piece structure with one portion cut. 5 has a ring main body portion 21 (an example of a detachment prevention main body portion) fitted between the outer periphery of 5 and an engagement portion 22 that can be engaged with the insertion projection 9. The engaging portion 22 protrudes from the ring main body portion 21 in the insertion direction B of the insertion port 5 and enters between the inner peripheral surface of the first recess 18 of the seal member 7 and the outer peripheral surface of the insertion port 5.

また、係合部２２の管径方向における肉厚Ｔ１はリング本体部２１の管径方向における肉厚Ｔ２よりも薄い。尚、ロックリング１０は一つ割り構造であるため、図４の仮想線で示すように、専用の拡径具を用いて、ロックリング１０の切断部２３を拡大させるような外力Ｆを作用させることにより、ロックリング１０の内径を拡大（拡径）することが可能であり、上記のような外力Ｆを除去することにより、ロックリング１０の内径が元の径に復元される。   Further, the wall thickness T1 of the engagement portion 22 in the tube diameter direction is thinner than the wall thickness T2 of the ring body portion 21 in the tube diameter direction. Since the lock ring 10 has a split structure, an external force F that enlarges the cutting portion 23 of the lock ring 10 is applied using a dedicated diameter expanding tool, as indicated by the phantom line in FIG. Thus, the inner diameter of the lock ring 10 can be enlarged (expanded), and the external force F as described above is removed, so that the inner diameter of the lock ring 10 is restored to the original diameter.

ロックリング１０には溝３６が形成されており、ロックリング１０を拡径する場合、拡径具を溝３６に係合する。また、ロックリング１０には、拡径方向への変形を容易にするための複数の切欠部２４（減肉部の一例）が形成されている。   A groove 36 is formed in the lock ring 10, and when the diameter of the lock ring 10 is increased, the diameter increasing tool is engaged with the groove 36. Further, the lock ring 10 is formed with a plurality of cutout portions 24 (an example of a thinned portion) for facilitating deformation in the diameter increasing direction.

尚、図１,図２に示すように、挿口突部９は、管軸方向において、シール部材７の圧縮部１６とロックリング１０の係合部２２との間に位置する。
図６,図７に示すように、押輪８は、円環状の部材であり、内周部に、ロックリング１０のリング本体部２１が嵌まり込む嵌込部２５と傾斜面２６とを有している。嵌込部２５の内径ｄ３は押輪８の内径ｄ４よりも大きく、傾斜面２６は、押輪８の内周面８ａと嵌込部２５の内周面２５ａとの間に形成され、挿口５の挿入方向Ｂほど拡径するように傾斜しており、図１,図２に示すように、ロックリング１０のリング本体部２１の端面と外周面とのコーナー部に当接する。 As shown in FIGS. 1 and 2, the insertion projection 9 is located between the compression portion 16 of the seal member 7 and the engagement portion 22 of the lock ring 10 in the tube axis direction.
As shown in FIGS. 6 and 7, the push wheel 8 is an annular member, and has an insertion portion 25 and an inclined surface 26 into which the ring main body portion 21 of the lock ring 10 is fitted on the inner peripheral portion. ing. The inner diameter d3 of the fitting portion 25 is larger than the inner diameter d4 of the push wheel 8, and the inclined surface 26 is formed between the inner peripheral surface 8a of the push wheel 8 and the inner peripheral surface 25a of the fitting portion 25. It is inclined so as to increase in diameter in the insertion direction B, and as shown in FIGS. 1 and 2, abuts against the corner portion between the end surface and the outer peripheral surface of the ring main body portion 21 of the lock ring 10.

図１に示すように、押輪８と受口４のフランジ６とは複数のＴ型のボルト２８とナット２９とにより連結され、スペーサ１１が押輪８と受口４との間に挟まれており、これにより、押輪８と受口４のフランジ６との間には所定の間隙３１が形成され、押輪８と受口４のフランジ６とがスペーサ１１を介して離間している。   As shown in FIG. 1, the pusher wheel 8 and the flange 6 of the receiving port 4 are connected by a plurality of T-shaped bolts 28 and nuts 29, and the spacer 11 is sandwiched between the pusher wheel 8 and the receiving port 4. Thus, a predetermined gap 31 is formed between the pusher wheel 8 and the flange 6 of the receiving port 4, and the pusher wheel 8 and the flange 6 of the receiving port 4 are separated via the spacer 11.

シール部材７はスペーサ１１を介して押輪８により受口４の奥側へ押されている。図８〜図１０に示すように、スペーサ１１は、樹脂製の円環状の部材であり、シール部材７に当接する側に、第２凹部３２を有している。尚、第２凹部３２の外周面３３は挿口５の挿入方向Ｂほど拡径するように傾斜している。図１,図２に示すように、シール部材７の基部１７の端部がスペーサ１１の第２凹部３２に嵌め込まれている。   The seal member 7 is pushed to the back side of the receiving port 4 by a pusher wheel 8 through a spacer 11. As shown in FIGS. 8 to 10, the spacer 11 is an annular member made of resin, and has a second recess 32 on the side in contact with the seal member 7. In addition, the outer peripheral surface 33 of the 2nd recessed part 32 inclines so that it may expand in diameter in the insertion direction B of the insertion port 5. As shown in FIGS. 1 and 2, the end of the base portion 17 of the seal member 7 is fitted in the second recess 32 of the spacer 11.

また、ロックリング１０の係合部２２は、スペーサ１１の内周面と挿口５の外周面との間を通って、シール部材７の第１凹部１８の内周面と挿口５の外周面との間に入り込んでいる。   Further, the engaging portion 22 of the lock ring 10 passes between the inner peripheral surface of the spacer 11 and the outer peripheral surface of the insertion port 5, and the inner peripheral surface of the first recess 18 of the seal member 7 and the outer periphery of the insertion port 5. It is in between the faces.

以下、上記構成における作用を説明する。
図１に示すように、管継手１を介して両管２,３同士を接合した状態では、挿口突部９よりも受口４の奥側において、シール部材７の圧縮部１６が受口４の内周面と挿口５の外周面とに挟まれて管径方向に圧縮されることにより、受口４と挿口５との間がシールされ、管２,３内の水（流体の一例）が受口４と挿口５との間から漏出するのを防止できる。 Hereinafter, the operation of the above configuration will be described.
As shown in FIG. 1, in a state where both pipes 2 and 3 are joined together via the pipe joint 1, the compression portion 16 of the seal member 7 is the receiving port on the back side of the receiving port 4 with respect to the insertion projection 9. 4 is sandwiched between the inner peripheral surface of 4 and the outer peripheral surface of the insertion port 5 and compressed in the tube radial direction, so that the space between the receiving port 4 and the insertion port 5 is sealed. Can be prevented from leaking from between the receiving port 4 and the insertion port 5.

さらに、シール部材７はスペーサ１１を介して押輪８により受口４の奥側へ押されているため、管２,３内の水圧（流体圧の一例）等によってシール部材７が受口４の外部へ押し出されるのを防止できる。   Further, since the seal member 7 is pushed to the back side of the receiving port 4 by the pusher wheel 8 through the spacer 11, the seal member 7 is connected to the receiving port 4 by water pressure (an example of fluid pressure) in the pipes 2 and 3. It can be prevented from being pushed out.

また、地震等によって挿口５に離脱力が作用しても、挿口突部９が離脱方向Ａからロックリング１０の係合部２２に係合することにより、挿口５が受口４から離脱するのを防止することができる。   Further, even if a detachment force acts on the insertion slot 5 due to an earthquake or the like, the insertion slot 5 is engaged with the engagement part 22 of the lock ring 10 from the separation direction A, so that the insertion slot 5 is removed from the receiving slot 4. It can be prevented from leaving.

また、シール部材７が挿口突部９の外周に位置しているため、シール部材７の位置と挿口突部９の位置とが管径方向において重複し、挿口５の先端部から挿口突部９までの長さＬ１が短縮される。これにより、受口４の開口端部から受口４内の奥端３５までの長さＬ２を短縮することができ、管軸方向において管継手１が小型化される。   In addition, since the seal member 7 is located on the outer periphery of the insertion protrusion 9, the position of the seal member 7 and the position of the insertion protrusion 9 overlap in the tube diameter direction and are inserted from the distal end of the insertion opening 5. The length L1 to the mouth projection 9 is shortened. Thereby, the length L2 from the opening end part of the receiving port 4 to the back end 35 in the receiving port 4 can be shortened, and the pipe joint 1 is reduced in size in the tube axis direction.

また、図１,図２に示すように、ロックリング１０の係合部２２は挿口５の挿入方向Ｂからシール部材７の第１凹部１８の内周面と挿口５の外周面との間に入り込んでいるため、シール部材７の一端部（すなわちスペーサ１１に当接する側の端部）が管径方向の内側へ変形し難くなり、シール部材７の基部１７の形状が安定するので、シール性（水密性）の低下を防止することができる。   As shown in FIGS. 1 and 2, the engaging portion 22 of the lock ring 10 is formed between the inner peripheral surface of the first recess 18 of the seal member 7 and the outer peripheral surface of the insertion port 5 from the insertion direction B of the insertion port 5. Since one end of the seal member 7 (that is, the end on the side in contact with the spacer 11) is difficult to be deformed inward in the tube diameter direction, the shape of the base portion 17 of the seal member 7 is stabilized. A decrease in sealing performance (watertightness) can be prevented.

また、図６,図７に示すように、押輪８は分割構造を有していない円環状の部材であるため、押輪８の強度を高くし、コストを低減することができる。
次に、管継手１を用いた管２,３の接合方法を説明する。 Further, as shown in FIGS. 6 and 7, since the pusher wheel 8 is an annular member having no divided structure, the strength of the pusher wheel 8 can be increased and the cost can be reduced.
Next, a method for joining the pipes 2 and 3 using the pipe joint 1 will be described.

図１１に示すように、先ず、押輪８を挿口５に外嵌して挿口突部９よりも挿口５の離脱方向Ａ側へ移動させる。次に、専用の拡径具を用いて、図４の仮想線で示すように、ロックリング１０に外力Ｆを作用し、ロックリング１０を、内径を拡大した状態で、挿口５に外嵌して挿口突部９よりも挿口５の離脱方向Ａ側へ移動させ、その後、拡径具をロックリング１０から外して、拡径していたロックリング１０の径を縮小（縮径）し、ロックリング１０を挿口５の外周に抱き付かせ、ロックリング１０のリング本体部２１を、押輪８の嵌込部２５に嵌め込んで、押輪８の内周と挿口５の外周との間に配置する。   As shown in FIG. 11, first, the push wheel 8 is externally fitted to the insertion slot 5, and is moved to the detachment direction A side of the insertion slot 5 from the insertion slot projection 9. Next, as shown by the phantom line in FIG. 4, an external force F is applied to the lock ring 10 using an exclusive diameter expanding tool, and the lock ring 10 is externally fitted to the insertion opening 5 with the inner diameter enlarged. Then, the insertion port 5 is moved to the detaching direction A side of the insertion port 5, and then the diameter expanding tool is removed from the lock ring 10 to reduce the diameter of the expanded lock ring 10 (reduction in diameter). Then, the lock ring 10 is hugged to the outer periphery of the insertion slot 5, and the ring main body portion 21 of the lock ring 10 is fitted into the insertion part 25 of the press wheel 8, so that the inner periphery of the press wheel 8 and the outer periphery of the insertion slot 5 are Place between.

ロックリング１０は係合部２２の肉厚Ｔ１がリング本体部２１の肉厚Ｔ２よりも薄く、さらには、ロックリング１０に切欠部２４を設けたため、ロックリング１０の強度が高くなり過ぎず、これにより、管接合時、ロックリング１０を拡径するのに要する力Ｆが低減され、ロックリング１０の拡径作業の手間が軽減される。   In the lock ring 10, the wall thickness T1 of the engaging portion 22 is thinner than the wall thickness T2 of the ring main body portion 21. Further, since the lock ring 10 is provided with the notch 24, the strength of the lock ring 10 does not become too high. Thereby, the force F required to expand the diameter of the lock ring 10 at the time of pipe joining is reduced, and the labor for expanding the diameter of the lock ring 10 is reduced.

尚、ロックリング１０の取付姿勢を安定させるためには、管軸方向におけるロックリング１０の幅Ｗを大きくすることが好ましく、この場合であっても、上記のようにロックリング１０の拡径作業の手間が軽減される。   In order to stabilize the mounting posture of the lock ring 10, it is preferable to increase the width W of the lock ring 10 in the tube axis direction. Even in this case, the diameter of the lock ring 10 is increased as described above. The effort of is reduced.

その後、シール部材７の基部１７の一端部をスペーサ１１の第２凹部３２に嵌め込み、この状態で、シール部材７とスペーサ１１とを挿口５に外嵌し、スペーサ１１を、挿口突部９よりも挿口５の離脱方向Ａ側へ移動させて、ロックリング１０の係合部２２に外嵌するとともに、シール部材７を挿口突部９の外周側に位置させる。この際、挿口突部９をシール部材７の第１凹部１８に挿入することにより、シール部材７を容易に挿口突部９の外周側に位置させることができる。   Thereafter, one end portion of the base portion 17 of the seal member 7 is fitted into the second recess 32 of the spacer 11, and in this state, the seal member 7 and the spacer 11 are fitted to the insertion port 5, and the spacer 11 is inserted into the insertion projection. 9 is moved to the detaching direction A side of the insertion slot 5 to be externally fitted to the engagement part 22 of the lock ring 10, and the seal member 7 is positioned on the outer peripheral side of the insertion slot protrusion 9. At this time, by inserting the insertion projection 9 into the first recess 18 of the seal member 7, the seal member 7 can be easily positioned on the outer peripheral side of the insertion projection 9.

尚、この時、シール部材７の圧縮部１６が挿口５の先端から挿口突部９までの範囲内に入るようにセットしておく。
その後、ボルト２８とナット２９を締め込んで、スペーサ１１を介して押輪８でシール部材７を押しながら挿口５を受口４内に挿入する。
このようにしてシール部材７を受口４内に押し込む際、シール部材７の一端部がスペーサ１１の第２凹部３２に嵌め込まれているため、シール部材７の一端部が拡径方向へ過剰に変形（移動）するのを防止することができる。これにより、管２,３同士を接合する際、シール部材７の一端部が受口４のフランジ６の端面とスペーサ１１との間に挟まれることはなく、図１,図２に示すように、スペーサ１１が十分な力でシール部材７を押すことができ、このため、シール部材７を受口４の内周面と挿口５の外周面との間に確実に挿入して、シール部材７のシール性能を良好に保つことができる。 At this time, the compression member 16 of the seal member 7 is set so as to fall within the range from the distal end of the insertion slot 5 to the insertion projection 9.
Thereafter, the bolt 28 and the nut 29 are tightened, and the insertion port 5 is inserted into the receiving port 4 while pushing the seal member 7 with the pusher wheel 8 through the spacer 11.
When the seal member 7 is pushed into the receiving port 4 in this way, one end portion of the seal member 7 is fitted into the second recess 32 of the spacer 11, so that one end portion of the seal member 7 is excessively increased in the diameter increasing direction. It is possible to prevent deformation (movement). Thereby, when joining the pipes 2 and 3, one end portion of the seal member 7 is not sandwiched between the end face of the flange 6 of the receiving port 4 and the spacer 11, as shown in FIGS. 1 and 2. The spacer 11 can push the seal member 7 with a sufficient force. For this reason, the seal member 7 is securely inserted between the inner peripheral surface of the receiving port 4 and the outer peripheral surface of the insertion port 5, The sealing performance of 7 can be kept good.

また、挿口５を受口４内に挿入する際、図１１に示すように、シール部材７の圧縮部１６が挿口５の先端から挿口突部９までの範囲内に入るようにセットされているため、圧縮部１６が挿口５の先端と受口４内の奥端３５との間に挟まれてしまうといった装着不良（図１２参照）や、シール部材７を十分に受口４内に挿入することができないといった装着不良（図１３参照）の発生を防止することができる。
（第２の実施の形態）
以下に、第２の実施の形態について説明する。尚、第１の実施の形態と同じ部材については同一の符号を付記して、その詳細な説明を省略する。 Further, when the insertion port 5 is inserted into the receiving port 4, as shown in FIG. 11, the compression portion 16 of the seal member 7 is set so as to fall within the range from the distal end of the insertion port 5 to the insertion projection 9. For this reason, the compression portion 16 is sandwiched between the distal end of the insertion port 5 and the inner end 35 in the receiving port 4 (see FIG. 12), and the seal member 7 is sufficiently received by the receiving port 4. It is possible to prevent the occurrence of a mounting failure (see FIG. 13) that cannot be inserted into the inside.
(Second Embodiment)
The second embodiment will be described below. The same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

図１４に示すように、シール部材７の第１凹部１８は、第１凹部１８の内周面から基部１７の端面に面する段付部１９を全周にわたり有している。段付部１９の内径ｄ２は第１凹部１８の内径ｄ１よりも大きく形成されている。   As shown in FIG. 14, the first recess 18 of the seal member 7 has a stepped portion 19 that faces the end surface of the base 17 from the inner peripheral surface of the first recess 18 over the entire periphery. The inner diameter d2 of the stepped portion 19 is formed larger than the inner diameter d1 of the first recess 18.

図１５に示すように、スペーサ１１の第２凹部３２は、径方向において相対向する外周面３３と内周面３４とを有している。第２凹部３２の内径ｄ５はスペーサ１１の内径ｄ６よりも大きく、第２凹部３２の外径Ｄ１はスペーサ１１の外径Ｄよりも小さい。   As shown in FIG. 15, the second recess 32 of the spacer 11 has an outer peripheral surface 33 and an inner peripheral surface 34 that face each other in the radial direction. The inner diameter d5 of the second recess 32 is larger than the inner diameter d6 of the spacer 11, and the outer diameter D1 of the second recess 32 is smaller than the outer diameter D of the spacer 11.

図１６,図１７に示すように、シール部材７の基部１７の端部がスペーサ１１の第２凹部３２に嵌め込まれており、この際、スペーサ１１の内周縁部１１ａがシール部材７の基部１７の段付部１９に嵌まり込む。   As shown in FIGS. 16 and 17, the end portion of the base portion 17 of the seal member 7 is fitted in the second recess 32 of the spacer 11, and at this time, the inner peripheral edge portion 11 a of the spacer 11 is the base portion 17 of the seal member 7. Is fitted into the stepped portion 19.

これによると、図１８に示すように、シール部材７を受口４内に押し込む際、シール部材７の一端部がスペーサ１１の第２凹部３２に嵌め込まれているため、シール部材７の一端部が管径方向（拡径方向および縮径方向）へ過剰に変形（移動）するのを防止することができる。これにより、管２,３同士を接合する際、シール部材７の一端部が受口４のフランジ６の端面とスペーサ１１との間に挟まれることはなく、スペーサ１１が十分な力でシール部材７を押すことができ、図１６に示すように、シール部材７を受口４の内周面と挿口５の外周面との間に確実に挿入して、シール部材７のシール性能を良好に保つことができる。   According to this, as shown in FIG. 18, when the seal member 7 is pushed into the receiving port 4, one end portion of the seal member 7 is fitted into the second recess 32 of the spacer 11, so Can be prevented from being excessively deformed (moved) in the tube diameter direction (the diameter expansion direction and the diameter reduction direction). Thus, when joining the pipes 2 and 3, one end of the seal member 7 is not sandwiched between the end face of the flange 6 of the receiving port 4 and the spacer 11, and the spacer 11 is sealed with sufficient force. As shown in FIG. 16, the sealing member 7 is securely inserted between the inner peripheral surface of the receiving port 4 and the outer peripheral surface of the insertion port 5, and the sealing performance of the sealing member 7 is good. Can be kept in.

尚、上記各実施の形態では、図４に示すように、ロックリング１０には、複数の切込部２４（減肉部）が形成されているが、これに限られるものではなく、切込部２４を設けなくてもよい。   In each of the above embodiments, as shown in FIG. 4, the lock ring 10 is formed with a plurality of cut portions 24 (thinning portions). However, the present invention is not limited to this. The part 24 may not be provided.

また、上記各実施の形態では、図１に示すように、スペーサ１１が押輪８と受口４との間に挟まれ、押輪８と受口４のフランジ６との間には所定の間隙３１が形成され、押輪８と受口４のフランジ６とがスペーサ１１を介して離間しているが、これに限られるものではなく、スペーサ１１が設けられず、押輪８と受口４のフランジ６とが当接していてもよい。或いは、押輪８と受口４のフランジ６とのいずれか一方に突起部を設け、該突起部が押輪８と受口４のフランジ６とのいずれか他方に接触する様な形態であってもよい。   In each of the above embodiments, as shown in FIG. 1, the spacer 11 is sandwiched between the press wheel 8 and the receiving port 4, and a predetermined gap 31 is provided between the press wheel 8 and the flange 6 of the receiving port 4. However, the present invention is not limited to this, and the spacer 11 is not provided, and the pusher wheel 8 and the flange 6 of the receiving port 4 are separated from each other. May be in contact with each other. Alternatively, a protrusion may be provided on one of the press wheel 8 and the flange 6 of the receiving port 4, and the protrusion may be in contact with either the press wheel 8 or the flange 6 of the receiving port 4. Good.

以上説明した実施形態は本発明の一具体例に過ぎず、該記載により本発明の範囲が限定されるものではなく、本発明の作用効果が奏される範囲で適宜変更設計可能である。   The embodiment described above is merely a specific example of the present invention, and the scope of the present invention is not limited by the description, and can be appropriately modified and designed within the range where the effects of the present invention are exhibited.

１ 管継手
２ 一方の管
３ 他方の管
４ 受口
５ 挿口
７ シール部材
８ 押輪
９ 挿口突部
１０ ロックリング（離脱防止部材）
１１ スペーサ
１６ 圧縮部
１８ 第１凹部
２１ リング本体部（離脱防止本体部）
２２ 係合部
３２ 第２凹部
Ａ 挿口の離脱方向
Ｂ 挿口の挿入方向 DESCRIPTION OF SYMBOLS 1 Pipe joint 2 One pipe 3 The other pipe 4 Receptacle 5 Insert 7 Seal member 8 Push ring 9 Insert protrusion 10 Lock ring (detachment prevention member)
11 Spacer 16 Compression part 18 First recess 21 Ring body part (detachment prevention body part)
22 Engaging portion 32 Second recess A Insertion detachment direction B Insertion direction

Claims (6)

一方の管に形成された受口の内部に、他方の管に形成された挿口が挿入され、
挿口の外周面と受口の内周面との隙間に環状のシール部材が設けられ、
シール部材を受口の奥側へ押す押輪が挿口に外嵌されて受口の開口端部に外側から対向する管継手であって、
挿口は外周部に挿口突部を有し、
管軸方向において挿口突部に係合して、挿口が受口から離脱するのを防止する離脱防止部材が、押輪の内周と挿口の外周との間に設けられ、
シール部材は、挿口の外周面と受口の内周面とに挟まれて管径方向に圧縮される圧縮部を有するとともに、挿口突部の外周に位置しており、
シール部材の圧縮部が挿口突部よりも受口の奥側に位置することを特徴とする管継手。 The insertion port formed in the other tube is inserted into the interior of the receiving port formed in one tube,
An annular seal member is provided in the gap between the outer peripheral surface of the insertion port and the inner peripheral surface of the receiving port,
A push ring that pushes the seal member to the back side of the receiving port is fitted to the insertion port and faces the opening end of the receiving port from the outside,
The insertion opening has an insertion protrusion on the outer periphery,
A separation preventing member that engages with the insertion protrusion in the tube axis direction and prevents the insertion opening from being removed from the receiving opening is provided between the inner periphery of the push wheel and the outer periphery of the insertion opening.
The seal member has a compression portion that is sandwiched between the outer peripheral surface of the insertion port and the inner peripheral surface of the receiving port and is compressed in the pipe diameter direction, and is located on the outer periphery of the insertion port protrusion.
A pipe joint characterized in that the compression part of the seal member is located on the back side of the receiving port with respect to the insertion protrusion. シール部材の内周に、挿口突部が挿口の挿入方向から入り込む第１凹部が形成され、
第１凹部は、管軸方向において、シール部材の圧縮部よりも挿口の離脱方向側に存在していることを特徴とする請求項１記載の管継手。 On the inner periphery of the seal member, a first recess is formed in which the insertion protrusion protrudes from the insertion direction of the insertion opening,
2. The pipe joint according to claim 1, wherein the first concave portion is present on the side of the insertion direction of the insertion opening with respect to the compression portion of the seal member in the pipe axis direction. 離脱防止部材は、一箇所が切断された一つ割り構造の環状の部材であり、押輪の内周と挿口の外周との間に設けられた離脱防止本体部と、挿口突部に係合可能な係合部とを有し、
係合部は離脱防止本体部から挿口の挿入方向に突出し、
係合部の管径方向における肉厚が離脱防止本体部の管径方向における肉厚よりも薄いことを特徴とする請求項１又は請求項２に記載の管継手。 The detachment prevention member is an annular member having a one-piece structure with one portion cut off, and is associated with the detachment prevention main body portion provided between the inner periphery of the pusher wheel and the outer periphery of the insertion port, and the insertion port protrusion. An engaging portion that can be mated,
The engaging part protrudes from the separation preventing main body part in the insertion direction of the insertion opening,
3. The pipe joint according to claim 1, wherein a thickness of the engaging portion in the pipe radial direction is thinner than a thickness of the separation preventing main body portion in the pipe radial direction. 係合部が挿口の挿入方向からシール部材の第１凹部に入り込んでおり、
挿口突部は、管軸方向において、シール部材の圧縮部と離脱防止部材の係合部との間に位置することを特徴とする請求項３記載の管継手。 The engaging portion enters the first recess of the seal member from the insertion direction of the insertion opening,
The pipe joint according to claim 3, wherein the insertion protrusion is located between the compression part of the seal member and the engagement part of the separation preventing member in the pipe axis direction. シール部材と押輪との間にスペーサが設けられ、
シール部材はスペーサを介して押輪により受口の奥側へ押され、
スペーサは、シール部材に当接する側に、第２凹部を有しており、
シール部材の一端部がスペーサの第２凹部に嵌め込まれていることを特徴とする請求項１から請求項４のいずれか１項に記載の管継手。 A spacer is provided between the seal member and the push ring,
The seal member is pushed to the back side of the receiving port by a push ring through a spacer,
The spacer has a second recess on the side in contact with the seal member,
The pipe joint according to any one of claims 1 to 4, wherein one end of the seal member is fitted in the second recess of the spacer. 上記請求項１から請求項５のいずれか１項に記載の管継手を用いた管の接合方法であって、
押輪を挿口に外嵌して挿口突部よりも挿口の離脱方向側へ移動させ、
離脱防止部材を、挿口に外嵌して挿口突部よりも挿口の離脱方向側へ移動させ、押輪の内周と挿口の外周との間に配置し、
シール部材を挿口に外嵌して挿口突部の外周に位置させ、
押輪でシール部材を押しながら挿口を受口内に挿入することを特徴とする管の接合方法。 A pipe joining method using the pipe joint according to any one of claims 1 to 5,
The press ring is externally fitted to the insertion opening, and moved from the insertion protrusion to the detachment direction side of the insertion opening,
The detachment preventing member is externally fitted to the insertion opening and moved to the detachment direction side of the insertion opening from the insertion opening protrusion, and is arranged between the inner periphery of the push wheel and the outer periphery of the insertion opening,
The seal member is externally fitted to the insertion port, and is positioned on the outer periphery of the insertion port protrusion.
A method for joining pipes, wherein an insertion port is inserted into a receiving port while pushing a seal member with a push ring.
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WO2023032988A1 (en) * 2021-09-03 2023-03-09 株式会社クボタ Pressing ring, pipe joint, and method for joining pipes

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