JP2010216515A - Pipe fitting - Google Patents

Pipe fitting Download PDF

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JP2010216515A
JP2010216515A JP2009061580A JP2009061580A JP2010216515A JP 2010216515 A JP2010216515 A JP 2010216515A JP 2009061580 A JP2009061580 A JP 2009061580A JP 2009061580 A JP2009061580 A JP 2009061580A JP 2010216515 A JP2010216515 A JP 2010216515A
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pipe
water
pipe joint
colorant
stop member
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JP5290815B2 (en
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Akinori Sakurada
秋能 桜田
Koichiro Okamoto
浩一郎 岡本
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Bridgestone Corp
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Bridgestone Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe fitting capable of detecting the degree of risk of water leakage occurrence before the usage lifetime so as to relax the risk of the water leakage damage. <P>SOLUTION: The pipe fitting 1 has two or more water stop members in the insertion part 11 of a pipe 6, which are interposed between the insertion part 11 and a pipe 6 to be inserted to ensure water tightness of the pipe 6 inside. In the pipe fitting 1, a coloring agent C is disposed in the insertion part on a passage from the water stop member the closest to the fluid flowing through the pipe 6 inside through between the insertion part 11 and the pipe 6 to be inserted to the water stop member the closest to the opening 7 side of the insertion part 11. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、管継手、中でも給水・給湯用パイプ等の結合を主な用途とした管継手に係り、該管継手の使用寿命前に、漏水発生の可能性を検知できる管継手に関するものである。   The present invention relates to a pipe joint, in particular, a pipe joint mainly used for coupling of water supply / hot water pipes, etc., and relates to a pipe joint capable of detecting the possibility of water leakage before the service life of the pipe joint. .

従来、主に給水・給湯用パイプ等を結合するための管継手としては、例えば、特許文献１に記載されているように、パイプ挿入部にＯリング等の止水部材を２つ具えることによって接続部の水密性を向上した、いわゆるダブルＯリング構造の管継手が一般的である。管継手をかような構造とすることにより、通常、常に配管内の流体と接触する側の第１止水部材から漏水が発生した場合に、他方の第２止水部材が管継手とパイプとの間の水密性を確保するため、漏水の発生頻度を低減させることができる。   Conventionally, as a pipe joint for mainly connecting a water supply / hot water supply pipe or the like, for example, as described in Patent Document 1, two pipe water stop members such as an O-ring are provided in the pipe insertion portion. In general, a pipe joint having a so-called double O-ring structure in which the water tightness of the connection portion is improved is generally used. With such a structure of the pipe joint, normally, when water leaks from the first water stop member on the side always in contact with the fluid in the pipe, the other second water stop member is connected to the pipe joint and the pipe. In order to ensure the water tightness between the two, the frequency of occurrence of water leakage can be reduced.

しかし、上記のように止水部材を複数具えた構造の管継手であっても、配管内流体との接触による劣化等により全ての止水部材が水密性機能を失うことによって、流体が配管の外部に漏出する場合がある。管継手から流体が漏出すると、配管周辺の構造物を腐食したり軟化させたりして安全性を損ねるほか、配管内の圧力低下により流体の安定供給が阻害されることがあり、経済的な損失を招く。   However, even in the case of a pipe joint having a structure including a plurality of water-stopping members as described above, all the water-stopping members lose their watertight function due to deterioration due to contact with the fluid in the pipes, etc. May leak to the outside. If fluid leaks from the pipe joint, it will corrode or soften the structures around the pipes, impairing safety, and the pressure drop in the pipes may hinder the stable supply of fluids. Invite.

従って、配管の安全な使用のためには、管継手を使用寿命前の適切な時期に新品と取替え、漏水を未然に防止することが必要であるが、一般的に管継手の使用寿命は、その使用環境や配管内の流体温度等により異なるため、従来の技術では予測が困難である。   Therefore, for the safe use of piping, it is necessary to replace the pipe fitting with a new one at an appropriate time before the service life and prevent water leakage, but generally the service life of the pipe joint is Since it differs depending on the usage environment, the fluid temperature in the piping, etc., it is difficult to predict with the conventional technology.

特開２００５−７６８５３JP-A-2005-76853

従って、本発明は、前記の問題点に鑑み、使用寿命前に漏水発生の危険度を検知可能な管継手を提供することを目的とし、該管継手からの漏水被害のリスク緩和を図る。   Therefore, in view of the above-mentioned problems, the present invention aims to provide a pipe joint capable of detecting the risk of occurrence of water leakage before its service life, and aims to reduce the risk of water damage from the pipe joint.

上記課題を解決する本発明の要旨は、以下の通りである。
（１）管の挿入部内に、該挿入部と挿入された管との間に介在して管内部の水密性を確保する２以上の止水部材を有する、管継手であって、
前記管内部を流れる流体に最も近い止水部材から、前記挿入部と挿入された管との間を通って、最も挿入部開口側に近い止水部材へと到る経路上の挿入部に、着色剤を配したことを特徴とする管継手。 The gist of the present invention for solving the above problems is as follows.
(1) A pipe joint having two or more water-stop members that are interposed between the insertion part and the inserted pipe to ensure water tightness inside the pipe.
From the water stop member closest to the fluid flowing inside the tube, to the insertion portion on the path from the insertion portion and the inserted tube to the water stop member closest to the insertion portion opening side, A pipe joint characterized by a coloring agent.

ここで、前記「挿入部」とは、パイプやホース等の管を前記管継手に挿入したときに該管の内周面、外周面または先端と隣接し、または接触する該管継手の一部分のことを言う。また、管継手が、カバーまたはキャップを具え、前記管の挿入時に該カバーまたはキャップが該管の外周面に被さる場合、前記「挿入部」は、該カバーまたはキャップの該管に面する部分も含む。さらに、管継手が、管を解除するための解除リング等の部材を具え、管の挿入時に該部材が管の外周面に隣接する場合、前記「挿入部」は、さらに、該部材の管に面する部分も含む。   Here, the “insertion portion” is a portion of the pipe joint that is adjacent to or in contact with the inner peripheral surface, outer peripheral surface, or tip of the pipe when a pipe such as a pipe or a hose is inserted into the pipe joint. Say that. Further, when the pipe joint includes a cover or a cap, and the cover or cap covers the outer peripheral surface of the pipe when the pipe is inserted, the “insertion portion” is also a portion of the cover or cap facing the pipe. Including. Further, when the pipe joint includes a member such as a release ring for releasing the pipe, and the member is adjacent to the outer peripheral surface of the pipe when the pipe is inserted, the “insertion portion” is further connected to the pipe of the member. Including the facing part.

前記「経路」は、例えば、止水部材の劣化等に伴って該止水部材から流体が外部に漏出する場合に、流体の通路となる。また、上記と同様に、前記管継手が、カバーまたはキャップを具え、管の挿入時に該カバーまたはキャップが管の外周面に被さるものとした管継手である場合、前記「経路」は、カバーまたはキャップと管との間に生じる経路も含む。   The “path” is, for example, a fluid passage when fluid leaks out of the water stop member due to deterioration of the water stop member or the like. Similarly to the above, when the pipe joint includes a cover or a cap and the cover or cap covers the outer peripheral surface of the pipe when the pipe is inserted, the “path” It also includes the path that occurs between the cap and the tube.

さらに、前記「挿入部開口」とは、止水部材から流体が漏出した場合に、流体が管継手外部へと漏出する出口であって、管の挿入時に外部から目視することのできる開口部分のことを言う。従って、前記「開口側」とは、例えば、前記管継手の内周面或いはカバーまたはキャップの内周面と、前記管の外周面との間の経路においては、前記管継手の先端側のことを言い、また、前記管継手の外周面と、前記管の内周面との間の経路においては、前記管継手の根元側のことを言う。   Further, the “insertion portion opening” is an outlet through which the fluid leaks to the outside of the pipe joint when the fluid leaks from the water stop member, and is an opening portion that can be visually observed from the outside when the pipe is inserted. Say that. Therefore, the “opening side” means, for example, the distal end side of the pipe joint in the path between the inner peripheral surface of the pipe joint or the inner peripheral face of the cover or cap and the outer peripheral face of the pipe. Moreover, in the path | route between the outer peripheral surface of the said pipe joint, and the inner peripheral surface of the said pipe, it says the base side of the said pipe joint.

尚、前記「止水部材」とは、流体の通過を防止するための部材のことを言い、例えば、ゴム製のＯリング、水膨張シール材などを含む。また、前記「流体」とは、液体および気体を含む。前記「着色剤」とは、例えば、絵の具、インク、ペンキ、トナー、蛍光塗料および食品添加物等を含む。前記着色剤は、例えば、前記管継手の本体部に塗布したり、前記管継手の本体部に窪みや溝を配して埋設したりできる。   The “water-stop member” refers to a member for preventing the passage of fluid, and includes, for example, a rubber O-ring, a water expansion seal material, and the like. The “fluid” includes liquid and gas. The “colorant” includes, for example, paint, ink, paint, toner, fluorescent paint, food additive, and the like. For example, the colorant can be applied to the main body portion of the pipe joint, or can be embedded in the main body portion of the pipe joint by providing a depression or a groove.

（２）前記着色剤を、前記管内部を流れる流体に最も近い止水部材から、前記挿入部と挿入された管との間を通って、最も挿入部開口側に近い止水部材へと到る経路上の挿入部に、埋設するものとした、上記（１）に記載の管継手。   (2) The colorant is passed from the water-stopping member closest to the fluid flowing inside the tube to the water-stopping member closest to the insertion portion opening side through between the insertion portion and the inserted tube. The pipe joint according to (1) above, which is embedded in an insertion portion on a path.

ここで、上記「埋設する」とは、例えば、前記挿入部を区画する壁面に窪みや溝等を設け、着色剤を該窪みや溝等を介して配設することを言う。   Here, “being buried” means, for example, providing a recess or groove on the wall surface that defines the insertion portion, and disposing the colorant via the recess or groove.

（３）前記管継手は、前記管の挿入時に該管の外周面に被さるカバーを具え、該カバーは透明である、上記（１）または（２）に記載の管継手。   (3) The pipe joint according to (1) or (2), wherein the pipe joint includes a cover that covers an outer peripheral surface of the pipe when the pipe is inserted, and the cover is transparent.

（４）前記着色剤が水溶性である、上記（１）〜（３）に記載の管継手。   (4) The pipe joint according to any one of (1) to (3), wherein the colorant is water-soluble.

（５）前記着色剤の色彩を、該着色剤の配設位置により区別するものとした、上記（１）〜（４）に記載の管継手。   (5) The pipe joint according to any one of (1) to (4), wherein the color of the colorant is distinguished by an arrangement position of the colorant.

（６）前記着色剤は、赤色または黄色を基本とした色彩の成分を含むものである、上記（１）〜（５）に記載の管継手。   (6) The pipe joint according to any one of (1) to (5), wherein the colorant includes a color component based on red or yellow.

本発明により、管継手の前記経路上において着色剤を配設した位置よりも流体側の挿入部にある止水部材が、経年劣化等により水密性機能を失った場合に、残る止水部材により、漏水が発生していない状態のままで、使用者は、水道出口からの流体の色彩によりこれを検知することができる。従って、管継手の接続部から完全に漏水が発生する前に、該漏水の危険度を予測することできるので、管継手の使用寿命前の適切な時期に取替えを行うことにより、漏水被害を未然に防止することが可能である。   According to the present invention, when the water stop member in the insertion portion on the fluid side from the position where the colorant is disposed on the path of the pipe joint loses the watertight function due to deterioration over time, the remaining water stop member The user can detect this by the color of the fluid from the outlet of the water supply without leaking water. Therefore, since the risk of water leakage can be predicted before water leakage completely occurs from the connection part of the pipe joint, it is possible to prevent water leakage damage by replacing it at an appropriate time before the service life of the pipe joint. It is possible to prevent.

本発明による外面シール型管継手の一形態を示す横断面図である。It is a cross-sectional view which shows one form of the outer surface seal type pipe joint by this invention. 本発明による内面シール型管継手の一形態を示す横断面図である。It is a cross-sectional view which shows one form of the internal seal type pipe joint by this invention. 本発明による内面シール型管継手の一形態を示す横断面図である。It is a cross-sectional view which shows one form of the internal seal type pipe joint by this invention. 本発明による内面シール型管継手の一形態を示す横断面図である。It is a cross-sectional view which shows one form of the internal seal type pipe joint by this invention. 本発明による内面シール型管継手の一形態を示す横断面図である。It is a cross-sectional view which shows one form of the internal seal type pipe joint by this invention. 本発明による内面シール型管継手の一形態を示す横断面図である。It is a cross-sectional view which shows one form of the internal seal type pipe joint by this invention.

以下に、本発明に従う管継手の具体例につき、図面を参照しつつ詳細に説明する。
図１は、本発明による外面シール型管継手の一形態を示す横断面図である。図１に示す管継手１は、該管継手の主要部分となる本体部２を有する。前記本体部２は、管６を挿入する挿入部１１に、止水部材３を配置するための２以上（図示例では２つ）の溝部９を具え、前記本体部２における挿入部１１の反対側に、他の配管と接続するためのねじ部１０を有する。溝部９に止水部材３を配置することにより、該止水部材３は、管６の挿入時、該管６と管継手１との間に介在して管６内部の水密性を確保する。前記管継手１は、さらに、コレット４およびキャップ５を具えており、キャップ５は、該管継手１からのコレット４の抜け出しを防止し、コレット４は、管６の装着時に該管６を把持する。また、挿入された管６に引き抜き方向の力が掛かる場合、キャップ５内側のテーパ面でコレット４が絞られ、コレット４の爪がより深く管６に食い込むことにより、管６の離脱が防止される。 Hereinafter, specific examples of the pipe joint according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view showing one embodiment of an outer seal type pipe joint according to the present invention. A pipe joint 1 shown in FIG. 1 has a main body 2 that is a main part of the pipe joint. The main body portion 2 includes two or more (two in the illustrated example) groove portions 9 for disposing the water-stopping member 3 in the insertion portion 11 into which the pipe 6 is inserted, and is opposite to the insertion portion 11 in the main body portion 2. On the side, there is a threaded portion 10 for connecting to other piping. By disposing the water stop member 3 in the groove 9, the water stop member 3 is interposed between the pipe 6 and the pipe joint 1 when the pipe 6 is inserted to ensure water tightness inside the pipe 6. The pipe joint 1 further includes a collet 4 and a cap 5. The cap 5 prevents the collet 4 from coming out of the pipe joint 1, and the collet 4 grips the pipe 6 when the pipe 6 is mounted. To do. Further, when a force in the pulling direction is applied to the inserted tube 6, the collet 4 is squeezed by the tapered surface inside the cap 5, and the claw of the collet 4 deeply bites into the tube 6, thereby preventing the tube 6 from being detached. The

ここで、本発明による管継手においては、前記管６内部を流れる流体に最も近い止水部材３から、前記挿入部１１と挿入された管６との間を通って、最も挿入部１１の開口側７に近い止水部材３へと到る経路上の挿入部１１に、着色剤Ｃを配することが肝要である。   Here, in the pipe joint according to the present invention, from the water blocking member 3 closest to the fluid flowing inside the pipe 6, the gap between the insertion part 11 and the inserted pipe 6 passes through the opening of the insertion part 11. It is important to dispose the colorant C in the insertion portion 11 on the path leading to the water stop member 3 close to the side 7.

例えば、図１に示すように、管継手１が、挿入部１１の内周面に止水部材３を２つ具えたいわゆる外面ダブルＯリングシール構造である場合、継手本体部２の根元側にある止水部材３ａと、継手本体部２の先端側にある止水部材３ｂとの間に、前記着色剤Ｃを配設する。また、図１では、継手本体部２に着色剤Ｃ用の溝を設け、該溝を介して着色剤Ｃを配設している。   For example, as shown in FIG. 1, when the pipe joint 1 has a so-called outer double O-ring seal structure in which two water blocking members 3 are provided on the inner peripheral surface of the insertion portion 11, The colorant C is disposed between a certain water stop member 3 a and a water stop member 3 b on the distal end side of the joint body 2. In FIG. 1, a groove for the colorant C is provided in the joint main body 2, and the colorant C is disposed through the groove.

前記経路上の該挿入部１１に着色剤Ｃを配設したことにより、着色剤Ｃの位置よりも流体側の挿入部１１にある止水部材３から漏水があった場合、該漏水は、着色剤Ｃ上を通過することによって着色される。着色された漏水は、さらに配管内の流体を着色して水道出口から流出する。使用者は、流出した流体の色彩を検知することにより、管継手１内部の止水部材３のいずれかが、水密性を失ったことを知ることができる。   When the colorant C is disposed in the insertion portion 11 on the path, when water leaks from the water stop member 3 in the insertion portion 11 on the fluid side with respect to the position of the colorant C, the water leakage is colored. Colored by passing over agent C. The colored water leakage further colors the fluid in the pipe and flows out from the water outlet. The user can know that one of the water stop members 3 in the pipe joint 1 has lost watertightness by detecting the color of the fluid that has flowed out.

本発明においては、図１のように、前記着色剤Ｃ、前記管内部を流れる流体に最も近い止水部材から、前記挿入部と挿入された管との間を通って、最も挿入部開口側に近い止水部材へと到る経路上の挿入部に、埋設することが好ましい。前記着色剤Ｃを管継手１に埋設することによって、多くの着色剤Ｃを配設することが可能である。着色剤Ｃを多く配設すれば、第１止水部材３ａから漏水が発生した場合に、配管内の流体がより濃く着色されるため、前記止水部材３ａの劣化をより確実に発見することができる。   In the present invention, as shown in FIG. 1, from the water stop member closest to the fluid flowing in the colorant C and the inside of the pipe, between the insertion section and the inserted pipe, the insertion section opening side is closest. It is preferable to embed it in the insertion part on the path to the water stop member close to. By embedding the colorant C in the pipe joint 1, it is possible to dispose many colorants C. If a large amount of the colorant C is disposed, when water leakage occurs from the first water stop member 3a, the fluid in the pipe is more intensely colored. Therefore, the deterioration of the water stop member 3a is more reliably detected. Can do.

図２〜６は、本発明による内面シール型管継手を示す横断面図である。図２〜６に示す管継手１は、管６の挿入時、該管６の内周面と該管継手１の外周面との間に止水部材３を配して該管６内部の水密性を確保する内面シール構造を有する。前記管継手１は、該管継手１の主要部分となる本体部２を有し、該本体部２の外側にカバー８およびキャップ５を具える。前記管継手１は、本体部２の中間付近にフランジ部１２を有し、また、前記本体部２の外周面、前記フランジ部１２並びに前記カバー８およびキャップ５の内周面とによって仕切られる部分が、管６の挿入部１１となる。管継手１は、さらに、管６の挿入時に該管６を把持する、くの字型のロックリング１４を具える。ロックリング１４は、カバー８に隣接して、該カバー８よりもキャップ５の開口側に配置されており、挿入された管６に引き抜き方向の力が掛かる場合、該ロックリング１４は、キャップ５内側のテーパ面に押し当てられ、管６に食い込むことによって、該管６の離脱を防止する。また、前記管継手１は、前記挿入部１１に、止水部材３を配置するための２以上（図２〜５では２つ、図６では３つ）の溝９を具え、前記本体部２における該挿入部１１の反対側に、他の配管と接続するためのねじ部１０を有する。前記溝９に止水部材３を配置することにより、該止水部材３は、管６の挿入時、該管６と管継手１との間に介在して管６内部の水密性を確保する。管継手１は、さらに、カバー８とキャップ５との間に、管６の着脱を可能とする解除リング１３を具え、特定の冶具を用いて該解除リング１３を押し込むことによりロックリング１４を径方向に開くことができ、管６の取外しが可能である。   2 to 6 are cross-sectional views showing an inner surface seal type pipe joint according to the present invention. 2 to 6, when the pipe 6 is inserted, the water stop member 3 is disposed between the inner peripheral surface of the pipe 6 and the outer peripheral surface of the pipe joint 1, so that the water tightness inside the pipe 6 is reduced. It has an internal seal structure that ensures safety. The pipe joint 1 has a main body 2 that is a main part of the pipe joint 1, and includes a cover 8 and a cap 5 outside the main body 2. The pipe joint 1 has a flange portion 12 near the middle of the main body portion 2, and is a portion partitioned by the outer peripheral surface of the main body portion 2, the flange portion 12, the cover 8 and the inner peripheral surface of the cap 5. Becomes the insertion portion 11 of the tube 6. The pipe joint 1 further includes a dog-shaped lock ring 14 that holds the pipe 6 when the pipe 6 is inserted. The lock ring 14 is disposed adjacent to the cover 8 and closer to the opening side of the cap 5 than the cover 8. When a force in the pulling direction is applied to the inserted tube 6, the lock ring 14 is attached to the cap 5. The pipe 6 is prevented from being detached by being pressed against the inner tapered surface and biting into the pipe 6. The pipe joint 1 includes two or more grooves (two in FIGS. 2 to 5 and three in FIG. 6) for disposing the water-stopping member 3 in the insertion portion 11, and the main body portion 2. The screw part 10 for connecting with other piping is provided on the opposite side of the insertion part 11 in FIG. By disposing the water stop member 3 in the groove 9, the water stop member 3 is interposed between the pipe 6 and the pipe joint 1 when the pipe 6 is inserted to ensure water tightness inside the pipe 6. . The pipe joint 1 further includes a release ring 13 that allows the pipe 6 to be attached and detached between the cover 8 and the cap 5, and the lock ring 14 has a diameter by pushing the release ring 13 using a specific jig. It can be opened in the direction and the tube 6 can be removed.

このとき、前記管６内部を流れる流体に最も近い止水部材３から、前記挿入部１１と挿入された管６との間を通って、最も挿入部１１の開口側７に近い止水部材３へと到る経路上の挿入部１１に、着色剤Ｃを配することが肝要である。   At this time, the water-stopping member 3 that is closest to the fluid flowing inside the pipe 6 passes between the insertion portion 11 and the inserted pipe 6 and is closest to the opening side 7 of the insertion portion 11. It is important to dispose the colorant C in the insertion portion 11 on the route to the end.

例えば、図２のように、管継手１が、継手本体部２に止水部材３を２つ具える、いわゆる内面ダブルＯリング構造である場合、着色剤Ｃは、管継手１の先端側の第１止水部材３ａから、該管継手１の根元側の第２止水部材３ｂへと到る前記経路上の、継手本体部２に配する。   For example, as shown in FIG. 2, when the pipe joint 1 has a so-called inner surface double O-ring structure in which the joint main body 2 includes two water-stop members 3, the colorant C is added to the tip side of the pipe joint 1. It arrange | positions to the coupling main-body part 2 on the said path | route from the 1st water stop member 3a to the 2nd water stop member 3b by the side of this pipe joint 1.

また、例えば、図３〜５のように、管継手１が、止水部材３の一方をカバー８と管６との間に介在する位置に具え、他方を管継手１の本体部２に具えた、いわゆる内外面ダブルＯリング構造である場合、管６内部の第１止水部材３ａから管６外側の第２止水部材３ｂへと到る前記形路上の挿入部１１に、着色剤Ｃを配設する。尚、上記したいわゆる内外面ダブルＯリング構造においては、さらに、継手本体部２とカバー８との接触面の水密性を保つことが必要な場合があり、通常は、図３および５に示すように、継手本体部２とカバー８とを一体化させることにより、止水する。また代替例として、例えば、継手本体部２およびカバー８の接触し合う両面に溝９を設けて、該溝９に予備的な止水部材３ｓを配置することにより、前記接触面の水密性を確保することが可能である。   Also, for example, as shown in FIGS. 3 to 5, the pipe joint 1 is provided at a position where one of the water blocking members 3 is interposed between the cover 8 and the pipe 6, and the other is provided in the main body 2 of the pipe joint 1. Further, in the case of a so-called inner / outer surface double O-ring structure, the coloring agent C is inserted into the insertion portion 11 on the path from the first water stop member 3a inside the pipe 6 to the second water stop member 3b outside the pipe 6. Is disposed. In the above-described so-called inner / outer surface double O-ring structure, it may be necessary to further maintain the water tightness of the contact surface between the joint main body 2 and the cover 8, and usually, as shown in FIGS. In addition, the joint main body 2 and the cover 8 are integrated to stop water. As an alternative example, for example, by providing grooves 9 on both surfaces of the joint body 2 and the cover 8 that are in contact with each other and arranging a preliminary water-stop member 3s in the grooves 9, the water tightness of the contact surfaces can be improved. It is possible to secure.

また、本発明による管継手１は、前記管６の挿入時に該管６の外周面に被さるカバー８を具え、該カバー８は透明であることが好ましい。   In addition, the pipe joint 1 according to the present invention includes a cover 8 that covers the outer peripheral surface of the pipe 6 when the pipe 6 is inserted, and the cover 8 is preferably transparent.

管継手１にカバー８を配することによって、該管継手１からの管６の離脱を、より確実に防止することができる。また、前記カバー８を透明とすることにより、例えば、前記管継手１を、図３〜図５に示すような、いわゆる内外面ダブルＯリング型の管継手１とした場合、継手本体部２に配した第１止水部材３ａから漏水があった場合に、該漏水は、前記着色剤Ｃ上を通って着色され、第１止水部材３ａから第２止水部材３ｂまでの経路に拡がるため、使用者は、カバー８の外部から該漏水を視認可能である。尚、図３および５に示す管継手１のように、継手本体部２およびカバー８が構造的に一体化しているような場合であっても、これらの構造的一体性を確保したまま、継手本体部２およびカバー８の材質を異なるものとすること、例えば、継手本体部２を不透明なＰＰＳ（ポリフェニレンサルファイド）樹脂や真鍮とし、カバー８部を透明なプラスチックとすること等が可能であり、これによって、カバー８のみを透明にすることができる。また、図４に示す管継手１のように、継手本体部２およびカバー８が分割可能である場合は、図示例のように継手本体部２およびカバー８の間に止水部材３ｓを介在させ、止水することが好ましい。   By disposing the cover 8 on the pipe joint 1, detachment of the pipe 6 from the pipe joint 1 can be more reliably prevented. Further, by making the cover 8 transparent, for example, when the pipe joint 1 is a so-called inner / outer surface double O-ring type pipe joint 1 as shown in FIGS. When there is water leakage from the arranged first water stop member 3a, the water leak is colored on the colorant C and spreads along the path from the first water stop member 3a to the second water stop member 3b. The user can visually recognize the water leakage from the outside of the cover 8. In addition, even when the joint body 2 and the cover 8 are structurally integrated as in the pipe joint 1 shown in FIGS. 3 and 5, the joint is maintained while maintaining the structural integrity thereof. The material of the main body 2 and the cover 8 can be different, for example, the joint main body 2 can be made of opaque PPS (polyphenylene sulfide) resin or brass, and the cover 8 can be made of transparent plastic. Thereby, only the cover 8 can be made transparent. When the joint body 2 and the cover 8 can be divided as in the pipe joint 1 shown in FIG. 4, a water stop member 3s is interposed between the joint body 2 and the cover 8 as in the illustrated example. It is preferable to stop the water.

内面シール構造の管継手１の場合、例えば、図３および６のように、管６を管継手１に挿入したときに該管６の内周面側先端部となる管継手１の本体部２部分に、溝を設けて前記着色剤Ｃを埋設することができる。このとき、カバー５が透明であれば、前記着色剤Ｃを、管６挿入時の装着確認の目印として利用することができる。   In the case of the pipe joint 1 having an inner surface seal structure, for example, as shown in FIGS. 3 and 6, when the pipe 6 is inserted into the pipe joint 1, the main body portion 2 of the pipe joint 1 that becomes the inner peripheral surface side distal end portion of the pipe 6. The colorant C can be embedded in the portion by providing a groove. At this time, if the cover 5 is transparent, the colorant C can be used as a mark for confirmation of attachment when the tube 6 is inserted.

また、例えば、図４のように、管６を管継手１に装着したときに該管６の先端方向となる継手本体部２に、細い溝を設けて着色剤Ｃを埋設することができる。かように着色剤Ｃを細い溝の中に埋設することにより、継手本体部２に配した第１止水部材３ａから漏水があった場合に、前記着色剤Ｃは、長時間にわたり該漏水を着色し続けることができるので、第１止水部材の劣化をより確実に発見可能である。   For example, as shown in FIG. 4, when the pipe 6 is attached to the pipe joint 1, the colorant C can be embedded by providing a narrow groove in the joint main body 2 that is in the distal end direction of the pipe 6. By embedding the colorant C in the narrow groove as described above, when there is water leakage from the first water stop member 3a disposed in the joint main body 2, the colorant C causes the water leakage for a long time. Since it can continue coloring, deterioration of a 1st water stop member can be discovered more reliably.

さらに、例えば、図５のように、前記着色剤Ｃは、管継本体部２の挿入部１１外周面に塗布したりすることができる。この場合、管継手１に溝等を設ける必要がないため、施工が容易である。   Furthermore, for example, as shown in FIG. 5, the colorant C can be applied to the outer peripheral surface of the insertion portion 11 of the pipe joint main body portion 2. In this case, since it is not necessary to provide a groove or the like in the pipe joint 1, the construction is easy.

また、本発明は、前記挿入部１１に３つ以上の止水部材３を具える管継手１にも適用することができる。この場合、前記経路上で隣接する止水部材３相互間の、一箇所または複数箇所に、着色剤Ｃを配設することが可能である。例えば、管継手１が、挿入部１１に止水部材３を３つ具える場合、図６のように、第１止水部材３ａ‐第２止水部材３ｂ間、第２止水部材３ｂ‐第３止水部材３ｃ間の両方に、着色剤Ｃ１およびＣ２を配設したりできる。 The present invention can also be applied to a pipe joint 1 having three or more water-stop members 3 in the insertion portion 11. In this case, it is possible to arrange the colorant C at one place or a plurality of places between the water stop members 3 adjacent on the path. For example, when the pipe joint 1 includes three water-stop members 3 in the insertion portion 11, as shown in FIG. 6, the first water-stop member 3 a and the second water-stop member 3 b, the second water-stop member 3 b- both between the third water cutoff member 3c, may or disposed colorant C 1 and C 2.

また、本発明において、前記着色剤Ｃは、水溶性であることが好ましい。前記着色剤Ｃとして、例えば、水溶性の水性系塗料や食品添加物等を使用することにより、漏水が着色されやすくなるため、該漏水をより確実に検知することができる。また、人体に影響の少ない食品添加物等を使用すれば、より安全に使用することができる。   In the present invention, the colorant C is preferably water-soluble. For example, by using a water-soluble water-based paint or food additive as the colorant C, the water leakage is easily colored, so that the water leakage can be detected more reliably. In addition, the use of food additives that do not affect the human body can be used more safely.

また、本発明においては、着色剤Ｃの色彩を、該着色剤Ｃの配設位置により区別することが好ましい。着色剤Ｃの色彩を、配設位置毎に区別することにより、水道出口から流出する流体の色彩をもとに、いずれの止水部材３が機能を失っているのかを特定することが可能である。   In the present invention, it is preferable to distinguish the color of the colorant C according to the position of the colorant C. By distinguishing the color of the colorant C for each arrangement position, it is possible to specify which water-stop member 3 has lost its function based on the color of the fluid flowing out from the water outlet. is there.

例えば、図６に示す管継手１の場合、第１止水部材３ａ‐第２止水部材３ｂ間に配した第１着色剤Ｃ１を赤色とし、第２止水部材３ｂ‐第２止水部材３ｂ間に配した第２着色剤Ｃ２を黄色としたりできる。これによって、使用者は、水道出口から流出する流体の色彩またはカバー８を介して視認できる漏水の色彩によって、その時点で流体側から何番目の止水部材３までが機能を失っているのかを知ることができる。 For example, when the pipe joint 1 shown in FIG. 6, the first colorant C 1 which arranged between the first water cutoff member 3a- second water cutoff member 3b to red, the second water cutoff member 3b- second water-stopping the second colorant C 2 which arranged between the member 3b may or yellow. As a result, the user can determine the number of the water stop members 3 from the fluid side to the point where the function has been lost due to the color of the fluid flowing out from the water outlet or the color of the water leakage visible through the cover 8. I can know.

さらに、継手部分を複数箇所に有する配管に本発明を使用する場合、継手部分毎に配設する着色剤Ｃの色彩を区別すれば、水道出口から流出する流体の色彩によって、いずれの次手部分における止水部材３が機能を失っているのかを、知ることができる。   Further, when the present invention is used for a pipe having joint portions at a plurality of locations, if the color of the colorant C provided for each joint portion is distinguished, any of the following portions can be determined depending on the color of the fluid flowing out from the water outlet. It is possible to know whether the water stop member 3 has lost its function.

加えて、本発明において、前記着色剤Ｃは、赤色または黄色を基本とした色彩の成分を含むものであることが好ましい。   In addition, in the present invention, it is preferable that the colorant C includes a color component based on red or yellow.

前記着色剤Ｃとして、視認性の高い赤色や黄色等を採用することで、漏水の発見をより容易化することができる。また、管６は、一般的に白色を中心とした色のものが多く、また、管継手１の本体部２は、主に銅合金製のものが主流であり、茶色に近い色であることからも、前記着色剤Ｃは赤色や黄色を基本とした色彩であることが好ましいと言える。尚、管６として、黄色に近いベージュ色のポリブテン製パイプを使用することも同様に多く、この場合は、赤色の着色剤Ｃを使用すると特に効果的である。   By using red, yellow, or the like with high visibility as the colorant C, the discovery of water leakage can be facilitated. In addition, the tube 6 generally has a color centered on white, and the main body 2 of the pipe joint 1 is mainly made of a copper alloy and has a color close to brown. Therefore, it can be said that the colorant C preferably has a color based on red or yellow. As the pipe 6, a beige polybutene pipe close to yellow is also used in many cases, and in this case, it is particularly effective to use a red colorant C.

尚、前記「赤色または黄色を基本とした色彩の成分」とは、例えば、「物体色の色名」としてＪＩＳに規定される慣用色名のうち、赤色、黄色、朱色、紅緋、茜色、橙色、紫色、マゼンタ、カーマイン、バーミリオンまたはアッシュローズ等、或いは、その他に、赤色または黄色の成分を多く含む色彩を、全て包含する。   The “color component based on red or yellow” refers to, for example, red, yellow, vermilion, red candy, scarlet, among conventional color names defined in JIS as “color name of object color”, Orange, purple, magenta, carmine, vermilion, ashrose, etc., or any other color that contains many red or yellow components is included.

本発明により、管継手からの漏水発生の可能性を検知することができるので、使用寿命前の適切な時期に取替えることによって、漏水を未然に防止することが可能である。また、本発明は施工が容易であり、他の付帯部材や装置等を必要としないため、経済的である。従い、本発明を、家庭や工業上の配管に使用すれば、漏水被害のリスクを低減した安全な使用を確保できるほか、配管内の流体の安定した供給を低ランニングコストで実現することが可能である。   According to the present invention, since it is possible to detect the possibility of water leakage from the pipe joint, it is possible to prevent water leakage by replacing it with an appropriate time before the service life. In addition, the present invention is economical because it is easy to construct and does not require other incidental members or devices. Therefore, if the present invention is used for household and industrial piping, it is possible to secure safe use with reduced risk of water leakage and to realize stable supply of fluid in the piping at a low running cost. It is.

０ 管継手の軸線
１ 管継手
２ 管継手の本体部
３ 止水部材
３ａ 第１止水部材
３ｂ 第２止水部材
３ｃ 第３止水部材
３ｓ 予備止水部材
４ コレット
５ キャップ
６ 管
７ 挿入部開口
８ カバー
９ 溝部
１０ ねじ部
１１ 挿入部
１２ フランジ部
１３ 解除リング
１４ ロックリング
Ｃ 着色剤
Ｃ１ 第１着色剤
Ｃ２ 第２着色剤 0 Pipe joint axis 1 Pipe joint 2 Pipe joint body 3 Water stop member 3a First water stop member 3b Second water stop member 3c Third water stop member 3s Preliminary water stop member 4 Collet 5 Cap 6 Pipe 7 Insertion portion Opening 8 Cover 9 Groove portion 10 Screw portion 11 Insertion portion 12 Flange portion 13 Release ring 14 Lock ring C Colorant C 1 First colorant C 2 Second colorant

Claims (6)

管の挿入部内に、該挿入部と挿入された管との間に介在して管内部の水密性を確保する２以上の止水部材を有する、管継手であって、
前記管内部を流れる流体に最も近い止水部材から、前記挿入部と挿入された管との間を通って、最も挿入部開口側に近い止水部材へと到る経路上の挿入部に、着色剤を配したことを特徴とする管継手。 A pipe joint having two or more water-stop members interposed between the insertion part and the inserted pipe to ensure water tightness inside the pipe in the insertion part of the pipe,
From the water stop member closest to the fluid flowing inside the tube, to the insertion portion on the path from the insertion portion and the inserted tube to the water stop member closest to the insertion portion opening side, A pipe joint characterized by a coloring agent. 前記着色剤を、前記管内部を流れる流体に最も近い止水部材から、前記挿入部と挿入された管との間を通って、最も挿入部開口側に近い止水部材へと到る経路上の挿入部に、埋設するものとした、請求項１に記載の管継手。   On the path from the water stop member closest to the fluid flowing inside the tube to the water stop member closest to the insertion portion opening side, passing between the insertion portion and the inserted tube. The pipe joint according to claim 1, which is embedded in the insertion portion. 前記管継手は、前記管の挿入時に該管の外周面に被さるカバーを具え、該カバーは透明である、請求項１または２に記載の管継手。   The pipe joint according to claim 1 or 2, wherein the pipe joint includes a cover that covers an outer peripheral surface of the pipe when the pipe is inserted, and the cover is transparent. 前記着色剤が水溶性である、請求項１〜３に記載の管継手。   The pipe joint according to claim 1, wherein the colorant is water-soluble. 前記着色剤の色彩を、該着色剤の配設位置により区別するものとした、請求項１〜４に記載の管継手。   The pipe joint according to any one of claims 1 to 4, wherein the color of the colorant is distinguished by an arrangement position of the colorant. 前記着色剤は、赤色または黄色を基本とした色彩の成分を含むものである、請求項１〜５に記載の管継手。   The said colorant is a pipe joint of Claims 1-5 containing the component of the color based on red or yellow.
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JP2012047289A (en) * 2010-08-27 2012-03-08 Bridgestone Corp Piping
JP2012219894A (en) * 2011-04-07 2012-11-12 Sekisui Chem Co Ltd Pipe joint
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JP2019019955A (en) * 2017-07-21 2019-02-07 株式会社ブリヂストン Hose joint

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