JP2009299863A

JP2009299863A - Plug-in type pipe joint

Info

Publication number: JP2009299863A
Application number: JP2008157475A
Authority: JP
Inventors: Yoshiro Okazaki; 義郎岡崎
Original assignee: JFE Pipe Fitting Mfg Co Ltd
Current assignee: JFE Pipe Fitting Mfg Co Ltd
Priority date: 2008-06-17
Filing date: 2008-06-17
Publication date: 2009-12-24

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plug-in type pipe joint for allowing easy visual check of the status of a connection pipe when being inserted, particularly, the status thereof after inserted. <P>SOLUTION: A connection pipe plug-in clearance 8 is formed between the inner periphery of a transparent or translucent outer cylinder 3 and the outer periphery of an inner cylinder 2 for receiving one end of the connection pipe P. An insertion guide ring entry space part 15 is formed between the base end of the outer cylinder 3 and the outer periphery of the inner cylinder 2. An insertion guide ring 14 is incorporated in a joint body 1 so as to be moved toward the inner corner of the connection pipe plug-in clearance 8 as pushed by one end of the connection pipe P. A check mark M is applied onto the outer periphery of the inner cylinder 2 facing the guide ring entry space part 15. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、給湯・給水配管等に用いられ、接続管の一端部を挿入するだけでシール状に接続できる差込み式管継手に係り、より詳しくは接続管の挿入途上の状況、とくに接続管の挿入後の状態を目視で容易に確認できるようにした差込み式管継手に関する。 The present invention relates to a plug-in pipe joint that is used for hot water supply / water supply pipes, etc., and can be connected in a seal shape by simply inserting one end of a connection pipe, and more particularly, the situation during the insertion of a connection pipe, The present invention relates to an insertion-type pipe joint that can easily visually check the state after insertion.

この種の差込み式管継手として、たとえば、図７、図８に示すようなものが公知である（例えば、特許文献１参照。）。その差込み式管継手は、接続管Ｐが外嵌される内筒（案内筒）３０を形成した継手本体３１と、内筒３０を覆うように継手本体３１に螺着される外筒（抜止めリング保持筒）３２と、内筒３０の外周の溝３３に嵌合したシールリング３４と、内筒３０と外筒３２の間に配設された抜止めリング３５及び挿入ガイドリング３６とを備えており、接続管Ｐの接続に際し、接続管Ｐの一端部を外筒３２の挿入口３７から挿入すると、挿入ガイドリング３６は接続管Ｐで押し動かされ、接続管Ｐの内周面と内筒３０の外周面に挟圧された状態で、シールリング３６の外周面を押圧しながら内筒３０をスライドし、抜止めリング３５は接続管Ｐの外周面を押圧する。そして、接続管Ｐの接続状態が正常か否かを外部から目視で確認できるように外筒３２を透明又は半透明に形成している。 As this type of plug-in type pipe joint, for example, those shown in FIGS. 7 and 8 are known (for example, see Patent Document 1). The plug-in type pipe joint includes a joint main body 31 that forms an inner cylinder (guide cylinder) 30 to which the connecting pipe P is fitted, and an outer cylinder that is screwed to the joint main body 31 so as to cover the inner cylinder 30 A ring holding cylinder) 32, a seal ring 34 fitted in a groove 33 on the outer periphery of the inner cylinder 30, a retaining ring 35 and an insertion guide ring 36 disposed between the inner cylinder 30 and the outer cylinder 32. When one end of the connection pipe P is inserted from the insertion port 37 of the outer cylinder 32 when the connection pipe P is connected, the insertion guide ring 36 is pushed and moved by the connection pipe P, and the inner peripheral surface of the connection pipe P The inner cylinder 30 is slid while pressing the outer peripheral surface of the seal ring 36 while being pressed by the outer peripheral surface of the cylinder 30, and the retaining ring 35 presses the outer peripheral surface of the connecting pipe P. And the outer cylinder 32 is formed transparently or semi-transparently so that it can confirm visually whether the connection state of the connection pipe P is normal from the outside.

特開２００２−１５６０８０号公報JP 2002-156080 A

しかるに、上記差込み式管継手の挿入ガイドリング３６は一般にステンレス鋼製で銀白色を帯びており、接続管Ｐも乳白色又はこれに似た色を帯びた樹脂材からなり、両者は類似の白色系であるため、識別しにくい。このため、接続管Ｐの挿入時に管継手の内部全体を外部から透視できても、接続管Ｐの挿入途上における状態、即ち接続管Ｐの一端部で挿入ガイドリング３６が正常に押し動かされているか否か等を明瞭に確認することが困難であり、特に暗い場所の施工現場では困難極まりないため、その良否の判定に誤認を生じ易く、信頼性に欠ける憂いがあった。 However, the insertion guide ring 36 of the plug-in type pipe joint is generally made of stainless steel and has a silvery white color, and the connecting pipe P is also made of a resin material having a milky white color or a similar color. Therefore, it is difficult to identify. For this reason, even when the entire inside of the pipe joint can be seen through from the outside when the connection pipe P is inserted, the insertion guide ring 36 is normally pushed and moved in the state during the insertion of the connection pipe P, that is, one end of the connection pipe P. It is difficult to clearly check whether or not there is a problem, and it is difficult to determine whether it is good or bad, especially in a dark construction site.

本発明は、このような問題を解決するためになされたもので、その目的とするところは、上記のような、透明若しくは半透明な外筒及び挿入ガイドリングの組み込まれた差込み式管継手において、接続管の挿入途上の状況、とくに接続管の挿入後の状態を目視で明瞭かつ誤認なく確認でき信頼性の高い施工を可能にする差込み式管継手を提供することにある。 The present invention has been made to solve such a problem, and the object of the present invention is in the above-described plug-in type pipe joint incorporating a transparent or translucent outer cylinder and an insertion guide ring. It is an object of the present invention to provide a plug-in type pipe joint that can confirm a state during insertion of a connecting pipe, in particular, a state after insertion of the connecting pipe, with a clear visual check and without misunderstanding, and enables highly reliable construction.

本発明の差込み式管継手は、請求項１に記載のように、その発明の内容を理解し易くするために図１〜図６に付した符号を参照して説明すると、内部に流体通路７を軸心方向に貫通状に形成した継手本体１の軸心方向一端部に、前記流体通路７と連通する流体連通路を有する内筒２と、継手本体１とは別体に形成され、内筒２の外周面との間で接続管Ｐの端部を受け入れる接続管差込間隙８を形成する透明若しくは半透明な外筒３とを備えており、内筒２又は外筒３に、接続管Ｐの端部と内筒２又は外筒３との間をシールするためのシールリング４を嵌め込み、外筒３内には、接続管差込間隙８に挿入される接続管Ｐの一端部で押されるに伴いシールリング４を圧縮しながら接続管差込間隙８の内奥方向へ向けて移動する挿入ガイドリング１４を備えている差込み式管継手において、外筒３の軸心方向内方の基端部側と内筒２の外周との間に、挿入ガイドリング１４が入り込むガイドリング進入空間部１５を接続管差込間隙８の内奥部と連通状に形成しており、該ガイドリング進入空間部１５の軸心方向深さは、挿入ガイドリング１４の軸心方向長さと同一か、それよりも少し深く形成しており、ガイドリング進入空間部１５に面する内筒２の外周に、確認用の目印Ｍをつけていることに特徴を有するものである。 In order to make the contents of the invention easy to understand, the plug-in type pipe joint of the present invention will be described with reference to the reference numerals attached to FIGS. The inner cylinder 2 having a fluid communication passage communicating with the fluid passage 7 at one end in the axial direction of the joint body 1 formed so as to penetrate in the axial direction and the joint body 1 are formed separately. A transparent or translucent outer cylinder 3 that forms a connecting pipe insertion gap 8 that receives the end of the connecting pipe P with the outer peripheral surface of the cylinder 2, and is connected to the inner cylinder 2 or the outer cylinder 3. A seal ring 4 for sealing between the end of the pipe P and the inner cylinder 2 or the outer cylinder 3 is fitted, and one end of the connection pipe P inserted into the connection pipe insertion gap 8 is inserted into the outer cylinder 3. The insertion guide ring 1 moves toward the inner depth of the connection pipe insertion gap 8 while compressing the seal ring 4 as it is pushed by In the plug-in type pipe joint having the guide tube entry space portion 15 into which the insertion guide ring 14 enters between the outer end of the inner tube 2 and the proximal end side of the outer tube 3 in the axial center direction. The guide ring entry space portion 15 has an axial depth that is the same as or slightly deeper than the axial length of the insertion guide ring 14. This is characterized in that a confirmation mark M is provided on the outer periphery of the inner cylinder 2 facing the guide ring entry space 15.

上記構成によると、接続管Ｐの一端部を接続管差込間隙８内に挿入するに伴い、挿入ガイドリング１４が接続管差込間隙８の内奥へ向けて押し込まれることによりシールリング４を圧縮するため、予め接続管Ｐの一端部の内周を面取り加工していなくても該接続管Ｐはシールリング４に突っ掛かることなくスムーズに挿入される。かかる挿入ガイドリング１４が接続管Ｐの一端部で押し動かされている状況は、外筒３が透明若しくは半透明に形成されているため、外部から目視で容易に確認することができる。したがって、たとえば、接続管Ｐの一端部により挿入ガイドリング１４が正常に押されているか否かを容易に確認でき、正常でない場合は逸速く発見でき、直ぐに接続管Ｐの挿入を止めて挿入し直しを促すことができる。 According to the above configuration, the insertion guide ring 14 is pushed toward the inner side of the connection pipe insertion gap 8 as one end portion of the connection pipe P is inserted into the connection pipe insertion gap 8, whereby the seal ring 4 is moved. In order to compress, the connecting pipe P is smoothly inserted without sticking to the seal ring 4 even if the inner periphery of one end of the connecting pipe P is not chamfered in advance. The situation where the insertion guide ring 14 is pushed and moved at one end of the connecting pipe P can be easily confirmed visually from the outside because the outer cylinder 3 is formed to be transparent or translucent. Therefore, for example, it can be easily confirmed whether or not the insertion guide ring 14 is normally pushed by one end of the connection pipe P. If it is not normal, it can be detected quickly, and the insertion of the connection pipe P is immediately stopped and inserted. You can encourage repairs.

接続管Ｐの一端部が接続管差込間隙８の内奥まで完全に挿入されると、挿入ガイドリング１４は挿入ガイドリング進入空間部１５に入り込んで目印Ｍを覆うため、外筒３から目印Ｍが見えなくなり、これにより接続管Ｐの一端部が接続管差込間隙８の内奥まで完全に挿入されたことを容易に確認することができる。したがって、漏水の原因となる接続管Ｐの挿入不良や挿入不足等を防止できる。 When one end of the connection pipe P is completely inserted into the connection pipe insertion gap 8, the insertion guide ring 14 enters the insertion guide ring entry space 15 and covers the mark M. M can no longer be seen, so that it can be easily confirmed that one end of the connecting pipe P is completely inserted into the connecting pipe insertion gap 8. Accordingly, it is possible to prevent poor insertion or insufficient insertion of the connecting pipe P that causes water leakage.

請求項１記載の差込み式管継手は、目印Ｍが塗装、印刷、又は貼付されたシール、テープ、ステッカーによって平面的に形成された構成を採用することができる。これによると、目印Ｍを容易に形成することができる。 The plug-in type pipe joint according to claim 1 can adopt a configuration in which the mark M is formed in a planar manner by a seal, tape, or sticker on which the mark M is painted, printed, or affixed. According to this, the mark M can be easily formed.

請求項１記載の差込み式管継手は、目印Ｍが内筒２の外周に嵌め込まれ、挿入ガイドリング１４に内嵌可能な目印用Ｏリング２２によって立体的に形成された構成を採用することができる。これによると、目印用Ｏリング２２は目印の機能以外に、内筒２と挿入ガイドリング１４との間のシール機能をも発揮することができる。
この場合、目印用Ｏリング２２には、請求項４に記載のように、内筒２の色彩とは異なる着色を施して明視性を高めることができる。 The insertion type pipe joint according to claim 1 adopts a configuration in which the mark M is fitted on the outer periphery of the inner cylinder 2 and is formed in three dimensions by the mark O-ring 22 that can be fitted in the insertion guide ring 14. it can. According to this, the mark O-ring 22 can exhibit a sealing function between the inner cylinder 2 and the insertion guide ring 14 in addition to the function of the mark.
In this case, the mark O-ring 22 can be colored different from the color of the inner cylinder 2 as described in claim 4 to enhance the visibility.

請求項１ないし４のいずれか１項に記載の差込み式管継手は、請求項５に記載のように、挿入ガイドリング１４には接続管Ｐの外表面および目印Ｍの色彩とは異なる着色を施した構成を採用することができる。この構成によると、挿入ガイドリング１４は接続管Ｐと識別しやすいため、外部から目視で一段と確認し易くなる。 In the plug-in type pipe joint according to any one of claims 1 to 4, the insertion guide ring 14 is colored differently from the outer surface of the connection pipe P and the color of the mark M, as described in claim 5. The applied configuration can be adopted. According to this configuration, the insertion guide ring 14 can be easily identified from the connection pipe P, and thus can be more visually confirmed from the outside.

本発明によれば、透明若しくは半透明な外筒の基端部側と内筒の外周との間にガイドリング進入空間部を接続管差込間隙の内奥部と連通状に形成し、ガイドリング進入空間部に面する内筒の外周に目印をつけるという簡単な手段で、接続管の挿入途上の状況や挿入後の状態、また接続管の一端部で挿入ガイドリングが押し動かされている状況などを目視で明瞭かつ誤認なく確認でき、信頼性の高い施工を可能にするという利点がある。 According to the present invention, a guide ring entry space is formed between the base end side of the transparent or translucent outer cylinder and the outer periphery of the inner cylinder so as to communicate with the inner depth of the connection pipe insertion gap, The insertion guide ring is pushed and moved at one end of the connection pipe by the simple means of marking the outer periphery of the inner cylinder facing the ring entry space, the situation during and after the insertion of the connection pipe There is an advantage that the situation can be visually confirmed clearly and without misunderstanding, and that highly reliable construction is possible.

本発明の好適な実施形態を図面に基づき説明する。図１は本発明の一実施例の差込み式管継手を接続管差込み前の状態で示す半欠截断面図、図２は図１の差込み式管継手を接続管差込み途中の状態で示す半欠截断面図、図３は図１の差込み式管継手を接続管差込み完了後の状態で示す半欠截断面図である。 A preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a half cutaway cross-sectional view showing a plug-in type pipe joint according to an embodiment of the present invention in a state before plugging in a connecting pipe, and FIG. 2 is a half-cutout showing the plug-in type pipe joint in FIG. FIG. 3 is a half-cut cross-sectional view showing the plug-in type pipe joint of FIG. 1 in a state after the connection pipe is completely inserted.

図１において、本発明の一実施例を示す差込み式管継手は、継手本体１に、内筒２、外筒３、シールリング４、抜止めリング５、及びプラグ６等を備える。 In FIG. 1, a plug-in pipe joint showing an embodiment of the present invention includes an inner cylinder 2, an outer cylinder 3, a seal ring 4, a retaining ring 5, a plug 6 and the like in a joint body 1.

図１に示すように、継手本体１は青銅鋳物等の金属あるいはプラスチック等で筒状に形成されて流体通路７を軸心方向に貫通状に形成しており、継手本体１の軸心方向一端部から内筒２を軸心方向外方へ流体通路７の中心軸Ｏと平行に一体に突出形成してあり、内筒２の内部に流体通路７が連通形成されている。また継手本体１の軸心方向一端部には、継手本体１とは別体に透明もしくは半透明な樹脂で筒状に形成された外筒３を、内筒２の外周面との間にポリブテンや架橋ポリエチレン等樹脂製又は金属製の接続管Ｐ（図２、図３参照）の端部を受け入れる接続管差込間隙８を形成すべく内筒２と同心状に取り付けている。その取り付けに際しては、外筒３の軸心方向内方側の基端部の開口部内周にリップ９を内向きに設け、このリップ９を継手本体１の内筒２の付け根部の外周に形成した凹溝１０に圧入嵌合して係合固定する。 As shown in FIG. 1, the joint body 1 is formed in a cylindrical shape with a metal such as bronze casting or plastic, and has a fluid passage 7 formed in a penetrating shape in the axial direction. The inner cylinder 2 protrudes integrally from the portion outward in the axial direction in parallel with the central axis O of the fluid passage 7, and the fluid passage 7 is formed in communication with the inside of the inner cylinder 2. Further, at one end in the axial direction of the joint main body 1, an outer cylinder 3 formed in a cylindrical shape with a transparent or translucent resin separately from the joint main body 1 is placed between the outer surface of the inner cylinder 2 and the polybutene. In addition, it is attached concentrically with the inner cylinder 2 so as to form a connecting pipe insertion gap 8 for receiving an end portion of a connecting pipe P made of resin such as cross-linked polyethylene or metal (see FIGS. 2 and 3). At the time of attachment, a lip 9 is provided inwardly on the inner periphery of the opening of the base end of the outer cylinder 3 in the axial direction, and this lip 9 is formed on the outer periphery of the base of the inner cylinder 2 of the joint body 1. The concave groove 10 is press-fitted and engaged and fixed.

継手本体１の軸心方向他端部には図示しない水栓やエルボ等にねじ込み接続される雄ねじ部１１を設けている。継手本体１の軸心方向中央部、すなわち内筒２と雄ねじ部１１との間の中間部の外周にはスパナやパイプレンチ等の工具が係合される断面多角形状の工具係合部１２を設けている。 A male threaded portion 11 that is screwed into a faucet or an elbow (not shown) is provided at the other axial end of the joint body 1. A tool engaging portion 12 having a polygonal cross section, which is engaged with a tool such as a spanner or a pipe wrench, is provided at the axial center of the joint body 1, that is, the outer periphery of the intermediate portion between the inner cylinder 2 and the male screw portion 11. Provided.

抜止めリング５はステンレス製品であって、環状の外径リング部５ａと、この外径リング部５ａの内周に一体に折曲形成した弾性を有する拡縮径変形自在な複数枚の食込み歯５ｂとを有する形に形成している。各食込み歯５ｂは外径リング部５ａの内周から接続管Ｐの差込み方向へ傾斜して延びる形に一体に形成している。 The retaining ring 5 is a stainless steel product, and has an annular outer diameter ring portion 5a, and a plurality of biting teeth 5b that are elastically formed to be bent and integrally formed on the inner periphery of the outer diameter ring portion 5a. It is formed in the shape which has. Each biting tooth 5b is integrally formed so as to extend in an inclined manner from the inner circumference of the outer diameter ring portion 5a to the insertion direction of the connecting pipe P.

外筒３は、これの軸心方向内方の基端部側３ａの外径を継手本体１の工具係合部１２の外径よりも細い径に形成して、工具係合部１２に掛けられるパイプレンチ（図示せず）の上顎と植歯の歯が基端部側３ａの外周面に接当干渉して傷付けるのを回避する。また外筒３はこれの軸心方向外方の先端部側３ｂを径方向外方へ膨出してこの先端部の内部に軸心方向外方へ向けて開放する形の開放口１３を形成する。外筒３の基端部側３ａの内周と内筒２の外周との間に、後述する挿入ガイドリング１４が入り込むガイドリング進入空間部１５を接続管差込間隙８の内奥部と連通状に形成している。ガイドリング進入空間部１５の軸心方向長さは、後述する挿入ガイドリング１４の軸心方向長さと同一か、それよりも少し深く形成している。 The outer cylinder 3 is formed so that the outer diameter of the base end side 3a on the inner side in the axial center direction is smaller than the outer diameter of the tool engaging portion 12 of the joint body 1, and is hung on the tool engaging portion 12. The upper jaw of the pipe wrench (not shown) and the teeth of the dentures are prevented from being damaged by contact interference with the outer peripheral surface of the proximal end side 3a. Further, the outer cylinder 3 is formed with an opening 13 having a shape in which the distal end side 3b on the outer side in the axial direction bulges outward in the radial direction and is opened outward in the axial direction inside the distal end. . A guide ring entry space 15 into which an insertion guide ring 14 to be described later enters between the inner periphery of the base end side 3a of the outer tube 3 and the outer periphery of the inner tube 2 communicates with the inner back portion of the connection tube insertion gap 8. It is formed in a shape. The length of the guide ring entry space 15 in the axial direction is the same as or slightly deeper than the length of the insertion guide ring 14 described later in the axial direction.

ガイドリング進入空間部１５に面する内筒２の外周には、接続管Ｐの挿入後の状態を目視で容易に確認できるようにするために、目印Ｍをつけている。目印Ｍは、例えば、目立つ色、すなわち明視性の高い色や図柄等の塗装、印刷をガイドリング進入空間部１５に面する内筒２の外周に施すか、又はシール、テープ、ステッカー等をガイドリング進入空間部１５に面する内筒２の外周に貼付することによって平面的に形成される。 A mark M is provided on the outer periphery of the inner cylinder 2 facing the guide ring entry space 15 so that the state after insertion of the connecting pipe P can be easily confirmed visually. For example, the mark M is applied to the outer periphery of the inner cylinder 2 facing the guide ring entry space 15 by applying or printing a conspicuous color, that is, a high-visibility color or design, or a seal, tape, sticker, or the like. It is planarly formed by sticking to the outer periphery of the inner cylinder 2 facing the guide ring entry space 15.

外筒３の開放口１３の内周面は、軸心方外方に向かった次第に広がるテーパーに形成された第１テーパー口１３ａと、この第１テーパー口１３ａの軸心方向外方側端に抜止め段部１６を介して連続し軸心方向外方に向かって次第に広がるテーパー状に開放する形に形成された第２テーパー口１３ｂにより断面鋸歯状波形に形成されている。外筒３の先端部内の第１テーパー口１３ａの内奥端側には、軸心方向内方に向かって次第に狭まる食込み歯逃がし用テーパー１３ｃが抜止めリング保持段部１７を介して形成されている。 The inner peripheral surface of the open port 13 of the outer cylinder 3 is formed at a first taper port 13a formed in a taper that gradually expands outward in the axial direction, and an axially outer side end of the first taper port 13a. It is formed in a sawtooth waveform in cross section by a second tapered port 13b formed so as to open continuously in a tapered shape that continuously extends through the retaining step portion 16 and gradually spreads outward in the axial direction. On the inner back end side of the first taper port 13a in the distal end portion of the outer cylinder 3, a biting tooth escape taper 13c that gradually narrows inward in the axial direction is formed via a retaining ring holding step 17. Yes.

外筒３の開放口１３の内部には抜止めリング５をプラグ６をもって組み込む。プラグ６は接続管Ｐが挿通可能な接続管挿通孔１８を有するリング状に形成され、プラグ６の外周面は開放口１３の内周面の第１,２テーパー口１３ａ，１３ｂおよび抜止め段部１６にそれぞれ対応する第１，２テーパー外周面６ａ，６ｂおよび抜止め段部１９による断面鋸歯状波形に形成される。このプラグ６の内端面の接続管挿通孔１８の周辺から（接続管Ｐに加わる引き抜き力による食込み歯５ｂの傾斜を制限する）断面円錐形状の食込み規制突起２０を軸心方向内方へ一体に突設している。 A retaining ring 5 is assembled with a plug 6 inside the opening 13 of the outer cylinder 3. The plug 6 is formed in a ring shape having a connection pipe insertion hole 18 into which the connection pipe P can be inserted, and the outer peripheral surface of the plug 6 is the first and second tapered ports 13a and 13b on the inner peripheral surface of the opening 13 and the retaining step. The first and second tapered outer peripheral surfaces 6a and 6b and the retaining step portion 19 corresponding to the portion 16 are formed in a sawtooth waveform in cross section. From the periphery of the connecting pipe insertion hole 18 on the inner end face of the plug 6, the biting restriction protrusion 20 having a conical section is integrated inward in the axial direction (which limits the inclination of the biting teeth 5 b due to the pulling force applied to the connecting pipe P). It is protruding.

かくして、抜止めリング５は開放口１３内に嵌め込まれ、その外径リング部５ａが抜止めリング保持段部１７と開放口１３に嵌められるプラグ６の内端面との間に介在されて食込み歯５ｂの先端が接続管差込間隙８内に突出するように保持される。
その際、外筒３の開放口１３の内周面は軸心方向外方に向かった次第に広がる第１,２テーパー口１３ａ，１３ｂにより断面鋸歯状波形に形成される一方、プラグ６の外周面がそれら第１,２テーパー口１３ａ，１３ｂに対応する第１，２テーパー外周面６ａ、６ｂにより断面鋸歯状波形に形成されているので、プラグ６を開放口１３に軸方向外方から差込み嵌合し易い。その差込み後は抜止め段部１６，１９同士が係合することによりプラグ６は開放口１３から抜け出ることがなく、接続管引抜方向に大きな力が掛かった時にプラグ６の食込み規制突起２０は食込み歯５ｂに重なり合って該食込み歯５ｂの接続管引抜方向への反り返りを拘束する状態に抜止めリング５が確実に保持される。しかも、そのように開放口１３に差込み嵌合されたプラグ６の外端面６ｃは開放口１３の外方に露出して外部からよく見えるので、そのプラグ６の差込み忘れの場合はこれを容易に確認することができる。 Thus, the retaining ring 5 is fitted in the opening 13, and the outer diameter ring portion 5 a is interposed between the retaining ring holding step 17 and the inner end face of the plug 6 fitted in the opening 13, and the biting teeth The tip of 5 b is held so as to protrude into the connecting pipe insertion gap 8.
At that time, the inner peripheral surface of the opening 13 of the outer cylinder 3 is formed in a sawtooth waveform in cross section by the first and second tapered ports 13a and 13b that gradually spread outward in the axial direction, while the outer peripheral surface of the plug 6 Is formed in a sawtooth waveform in section by the first and second tapered outer peripheral surfaces 6a and 6b corresponding to the first and second tapered ports 13a and 13b, so that the plug 6 is inserted into the open port 13 from the outside in the axial direction. Easy to match. After the insertion, the plug stoppers 16 and 19 are engaged with each other so that the plug 6 does not come out of the opening 13, and the biting restriction protrusion 20 of the plug 6 bites when a large force is applied in the connecting pipe pulling direction. The retaining ring 5 is securely held in a state where it overlaps with the teeth 5b and restrains the curling of the biting teeth 5b in the connecting tube withdrawal direction. Moreover, since the outer end surface 6c of the plug 6 inserted and fitted in the opening 13 is exposed to the outside of the opening 13 and can be seen from the outside, this can be easily done if the plug 6 is forgotten to be inserted. Can be confirmed.

図１に示すように、内筒２の外周面にはシールリング嵌合溝２１が設けられ、このシールリング嵌合溝２１に、接続管Ｐの端部の内周と内筒２の外周との間をシールするための合成ゴム、天然ゴム、合成樹脂等よりなるシールリング４が嵌め込まれる。 As shown in FIG. 1, a seal ring fitting groove 21 is provided on the outer circumferential surface of the inner cylinder 2. The seal ring fitting groove 21 includes an inner circumference at the end of the connecting pipe P, an outer circumference of the inner cylinder 2, and the like. A seal ring 4 made of synthetic rubber, natural rubber, synthetic resin, or the like for sealing between the two is fitted.

プラグ６の接続管挿通孔１８の内周と内筒２の開口端部外周との間には挿入ガイドリング１４が嵌入される。挿入ガイドリング１４はナイロン等の樹脂成形品であって、接続管Ｐおよび目印Ｍと明瞭に識別し易いように接続管Ｐの外表面および目印Ｍの色彩とは異なる着色を施してある。例えば、接続管Ｐの色彩が白色系である場合、挿入ガイドリング１４、目印Ｍには青色、赤色、又は緑色等を施す。そして、挿入ガイドリング１４の内径部には前端部から後方に向かって漸次拡開する後方拡開状のテーパー１４ａを、外径部には内径部とは逆に後端部から前方に向かって漸次拡開する前方拡開状のテーパー１４ｂをそれぞれ設けて断面Ｖ形状に形成している。また挿入ガイドリング１４は、さらに暗所でも挿入確認し易いように、蛍光体・リン光体を用いた夜光塗料を塗るか、夜光顔料入りの合成樹脂等で成形するなどして蛍光・リン光を発するよう形成することができる。挿入ガイドリング１４は前端部をプラグ６の接続管挿通孔１８の入口側に向けて接続管挿通孔１８の内周と内筒２の開口端部外周との間に組み込まれる。 An insertion guide ring 14 is fitted between the inner periphery of the connecting pipe insertion hole 18 of the plug 6 and the outer periphery of the opening end of the inner cylinder 2. The insertion guide ring 14 is a resin molded product such as nylon, and is colored differently from the outer surface of the connection pipe P and the color of the mark M so that it can be clearly distinguished from the connection pipe P and the mark M. For example, when the color of the connecting pipe P is white, the insertion guide ring 14 and the mark M are blue, red, or green. The insertion guide ring 14 has a taper 14a that expands backward from the front end to the inner diameter portion, and the outer diameter portion has a taper 14a from the rear end to the front, contrary to the inner diameter portion. A taper 14b having a front expanding shape that gradually expands is provided to form a V-shaped cross section. Further, the insertion guide ring 14 is fluorescent / phosphorescent by applying a luminescent paint using a phosphor / phosphor or molding it with a synthetic resin containing a luminescent pigment so that the insertion can be easily confirmed even in a dark place. Can be formed. The insertion guide ring 14 is assembled between the inner periphery of the connection tube insertion hole 18 and the outer periphery of the opening end portion of the inner cylinder 2 with the front end facing the inlet side of the connection tube insertion hole 18 of the plug 6.

次に、上記構成の差込み式管継手の使用態様を説明する。現場施工において、接続管Ｐは所要長さに切断される。この切断された接続管Ｐの端部は、図２に示すように、プラグ６の接続管挿通孔１８内に挿入され、この接続管Ｐの端部で挿入ガイドリング１４がこれの前方から押されて接続管差込間隙８の内奥方向へ押し込まれる。この押し込まれる挿入ガイドリング１４は、外径部のテーパー１４ｂで抜止めリング５の食込み歯５ｂを押し開いて拡径させるとともに、内径部のテーパー１４ａで内筒２の外周面からそれぞれ突出しているシールリング４の突出部４ａを径方向内方へ圧縮させながら通過する。このように挿入ガイドリング１４のテーパー１４ａが内筒２の外周面から突出しているシールリング４の突出部４ａを圧縮させながら通過することにより、予め接続管Ｐの端部の内周を面取り加工していなくても該接続管Ｐはシールリング４に突っ掛かることなくスムーズに挿入することができる。 Next, a usage mode of the plug-in type pipe joint having the above configuration will be described. In the on-site construction, the connecting pipe P is cut to a required length. As shown in FIG. 2, the cut end of the connection pipe P is inserted into the connection pipe insertion hole 18 of the plug 6, and the insertion guide ring 14 is pushed from the front of the connection pipe P at the end thereof. Then, the connecting pipe insertion gap 8 is pushed inward. The inserted guide ring 14 to be pushed in is pushed out by the tapers 14b of the retaining ring 5 by the outer diameter taper 14b to expand the diameter, and protrudes from the outer peripheral surface of the inner cylinder 2 by the inner taper 14a. The protrusion 4a of the seal ring 4 passes while being compressed radially inward. In this way, the taper 14a of the insertion guide ring 14 passes through the protruding portion 4a of the seal ring 4 protruding from the outer peripheral surface of the inner cylinder 2 while being compressed, so that the inner periphery of the end portion of the connecting pipe P is chamfered in advance. Even if not, the connecting pipe P can be smoothly inserted without sticking to the seal ring 4.

接続管Ｐが挿入ガイドリング１４を正常に押しているか否か、また挿入ガイドリング１４及び接続管Ｐが抜止めリング５の内部を正常に通過しているか否か等の状況は、外筒３が透明若しくは半透明であり、しかも挿入ガイドリング１４が接続管Ｐとは異なる色彩を施されて接続管Ｐと識別しやすいため、外部から目視で容易に確認することができる。したがって、たとえば、接続管Ｐが斜めに誤挿入されて挿入ガイドリング１４が正常に押されていなかったり、挿入ガイドリング１４が抜止めリング５の内部を正常に通過しなかったりする等の不具合が生じていると、これを逸速く発見できるため、直ぐに接続管Ｐの挿入を止めて挿入し直すことができる。 Whether or not the connecting pipe P normally pushes the insertion guide ring 14 and whether the insertion guide ring 14 and the connecting pipe P normally pass through the retaining ring 5 are determined by the outer cylinder 3. It is transparent or translucent, and the insertion guide ring 14 is given a color different from that of the connection pipe P and can be easily distinguished from the connection pipe P, so that it can be easily confirmed visually from the outside. Therefore, for example, there is a problem that the connection pipe P is erroneously inserted obliquely and the insertion guide ring 14 is not normally pushed, or the insertion guide ring 14 does not normally pass through the retaining ring 5. If it occurs, this can be discovered very quickly, so that the insertion of the connecting pipe P can be immediately stopped and reinserted.

図３に示すように、接続管Ｐの端部が接続管差込間隙８の内奥まで完全に挿入されると、シールリング４の突出部４ａが接続管Ｐの内周面に圧縮状に密着して接続管Ｐの内周面と内筒２の外周面との間をシールする状態が得られるとともに、抜止めリング５の食込み歯５ｂが縮径し接続管Ｐの外周面に係合して接続管Ｐの抜止め状態が得られる。
また、接続管Ｐの端部が、図３に示すように、接続管差込間隙８の内奥まで完全に挿入されると、挿入ガイドリング１４がガイドリング進入空間部１５にまで入り込んで目印Ｍを覆うため、外筒３から目印Ｍが見えなくなり、これにより接続管Ｐの端部が接続管差込間隙８の内奥まで完全に挿入されたことを容易に確認できる。これに対し、接続管Ｐが挿入不足の場合は挿入ガイドリング１４がガイドリング進入空間部１５内に完全に入り込まずに目印Ｍが外筒３から見えることになる。したがって、接続管Ｐの端部が接続管差込間隙８の内奥まで完全に挿入されたか否かを容易に確認することができる。したがって、漏水の原因となる接続管Ｐの挿入不良や挿入不足等を防止できる。 As shown in FIG. 3, when the end of the connection pipe P is completely inserted into the connection pipe insertion gap 8, the protrusion 4 a of the seal ring 4 is compressed on the inner peripheral surface of the connection pipe P. A state is obtained in which the space between the inner peripheral surface of the connecting pipe P and the outer peripheral surface of the inner cylinder 2 is sealed, and the biting teeth 5b of the retaining ring 5 are reduced in diameter to engage with the outer peripheral surface of the connecting pipe P. As a result, the connection pipe P can be prevented from being removed.
Further, as shown in FIG. 3, when the end of the connection pipe P is completely inserted into the connection pipe insertion gap 8, the insertion guide ring 14 enters the guide ring entry space 15 and is marked. Since M is covered, the mark M cannot be seen from the outer cylinder 3, so that it can be easily confirmed that the end portion of the connection pipe P is completely inserted into the connection pipe insertion gap 8. On the other hand, when the connection pipe P is insufficiently inserted, the insertion guide ring 14 does not completely enter the guide ring entry space 15 and the mark M can be seen from the outer cylinder 3. Therefore, it can be easily confirmed whether or not the end portion of the connection pipe P is completely inserted to the inner depth of the connection pipe insertion gap 8. Accordingly, it is possible to prevent poor insertion or insufficient insertion of the connecting pipe P that causes water leakage.

次に、継手本体１に接続された接続管Ｐに引き抜き力が加わったときには、抜止めリング５の食込み歯５ｂが縮径して接続管Ｐの外周面に食い込み、その軸線方向に対する食込み歯５ｂの傾斜角度が大きくなる。そのとき、抜止めリング５の食込み歯５ｂがプラグ６と一体の食込み規制突起２０に当るため、その食込み歯５ｂの傾斜による力が食込み規制突起２０に受け止められることにより、その食込み規制突起２０により接続管Ｐへの食込み歯５ｂの過度の食い込みが抑制され、また食込み歯５ｂの反り返りが拘束される。したがって、接続管Ｐの抜け出しを効果的に抑制することができる。 Next, when a pulling force is applied to the connecting pipe P connected to the joint body 1, the biting teeth 5b of the retaining ring 5 are reduced in diameter and bite into the outer peripheral surface of the connecting pipe P, and the biting teeth 5b in the axial direction thereof. The inclination angle becomes larger. At this time, the biting teeth 5b of the retaining ring 5 hit the biting restriction projection 20 integral with the plug 6, and the force due to the inclination of the biting teeth 5b is received by the biting restriction projection 20 so that the biting restriction projection 20 Excessive biting of the biting teeth 5b into the connecting pipe P is suppressed, and warping of the biting teeth 5b is restrained. Therefore, the connection pipe P can be effectively prevented from coming out.

図４は他の実施例の差込み式管継手を接続管差込み前の状態で示す半欠截断面図、図５は図４の差込み式管継手を接続管差込み途中の状態で示す半欠截断面図、図６は図４の差込み式管継手を接続管差込み完了後の状態で示す半欠截断面図である。
この実施例では、上記実施例のように目印Ｍを塗装、印刷又は貼付されたシール、テープ、ステッカーによって平面的に形成するに代えて、目印Ｍをガイドリング進入空間部１５に面する内筒２の外周に目印用Ｏリング２２を嵌め込んで立体的に形成したものであり、その他の構成は上記実施例のものと同様である。
目印用Ｏリング２２は内筒２の外周に設けた環状の凹溝２３に嵌め込まれ、挿入ガイドリング１４が外嵌可能に形成される。この場合、目印用Ｏリング２２には、内筒２の色彩とは異なる着色を施して明視性の高いものとすることが好ましい。 FIG. 4 is a half cutaway cross-sectional view showing the plug-in type pipe joint of another embodiment before the connection pipe is inserted, and FIG. 5 is a half cutout cross-section showing the plug-in type pipe joint of FIG. FIG. 6 and FIG. 6 are half cutaway cross-sectional views showing the plug-in type pipe joint of FIG. 4 in a state after completion of connecting pipe insertion.
In this embodiment, instead of forming the mark M planarly with a seal, tape, or sticker that has been painted, printed or affixed as in the above embodiment, the inner cylinder that faces the guide ring entry space 15 is used instead of forming the mark M flatly. The mark O-ring 22 is fitted around the outer periphery of the two to form a three-dimensional structure, and other configurations are the same as those of the above-described embodiment.
The mark O-ring 22 is fitted into an annular concave groove 23 provided on the outer periphery of the inner cylinder 2 so that the insertion guide ring 14 can be fitted. In this case, it is preferable that the mark O-ring 22 is colored differently from the color of the inner cylinder 2 so as to have high visibility.

このように目印Ｍを形成した場合は、接続管Ｐの端部が、図６に示すように、接続管差込間隙８の内奥まで完全に挿入されると、挿入ガイドリング１４がガイドリング進入空間部１５にまで入り込んで目印用Ｏリング２２に外嵌して該目印用Ｏリング２２を覆うため、外筒３から目印用Ｏリング２２が見えなくなり、これにより接続管Ｐの端部が接続管差込間隙８の内奥まで完全に挿入されたことを容易に確認できる。これに対し、接続管Ｐが挿入不足の場合は挿入ガイドリング１４がガイドリング進入空間部１５内に完全に入り込まずに目印用Ｏリング２２が外筒３から見えることになる。したがって、接続管Ｐの端部が接続管差込間隙８の内奥まで完全に挿入されたか否かを容易に確認することができる。したがって、漏水の原因となる接続管Ｐの挿入不良や挿入不足等を防止できる。
また、この目印用Ｏリング２２は内筒２の外周と挿入ガイドリング１４との間をシールする機能を兼備する。 When the mark M is formed in this way, when the end of the connecting pipe P is completely inserted into the connecting pipe insertion gap 8 as shown in FIG. Since it enters into the entry space 15 and is externally fitted to the mark O-ring 22 to cover the mark O-ring 22, the mark O-ring 22 cannot be seen from the outer cylinder 3. It can be easily confirmed that it has been completely inserted into the connection pipe insertion gap 8. On the other hand, when the connecting pipe P is insufficiently inserted, the insertion guide ring 14 does not completely enter the guide ring entry space 15 and the mark O-ring 22 can be seen from the outer cylinder 3. Therefore, it can be easily confirmed whether or not the end portion of the connection pipe P is completely inserted to the inner depth of the connection pipe insertion gap 8. Accordingly, it is possible to prevent poor insertion or insufficient insertion of the connecting pipe P that causes water leakage.
The mark O-ring 22 also has a function of sealing between the outer periphery of the inner cylinder 2 and the insertion guide ring 14.

上記各実施例では、シールリング４が内筒２の外周に嵌め込まれているが、これに代えてシールリング４は外筒３の内周に嵌め込んで接続管Ｐの端部と外筒３との間をシールするようにすることもできる。 In each of the above embodiments, the seal ring 4 is fitted to the outer periphery of the inner cylinder 2. Instead, the seal ring 4 is fitted to the inner circumference of the outer cylinder 3 to connect the end of the connecting pipe P and the outer cylinder 3. It is also possible to seal between the two.

また、上記各実施例では、プラグ６を外筒３の開放口１３内に嵌める手段は、プラグ６の外周に軸心方向外方に向かって次第に広がるテーパーに形成されたテーパー外周面６ａ，６ｂと、外筒３の開放口１３の内周に軸心方向外方に向かって次第に広がるテーパーに形成されテーパー外周面６ａ、６ｂに抜止め状にテーパー嵌合されるテーパー口１３ａ，１３ｂからなる構成を採用しているが、これに限られるものではない。それに代えて、図４に示すように、外筒３の開放口１３の内周に形成した雌ねじ１３ｄと、プラグ６の外周に形成され雌ねじ１３ｄに螺合される雄ねじ６ｄとからなる構成を採用することもできる。 In each of the above-described embodiments, the means for fitting the plug 6 into the opening 13 of the outer cylinder 3 is tapered outer peripheral surfaces 6a and 6b formed on the outer periphery of the plug 6 in a taper that gradually spreads outward in the axial direction. And taper ports 13a and 13b which are formed on the inner periphery of the opening 13 of the outer cylinder 3 so as to gradually spread outward in the axial direction and are taper-fitted to the taper outer peripheral surfaces 6a and 6b in a retaining manner. The configuration is adopted, but is not limited to this. Instead, as shown in FIG. 4, a configuration including a female screw 13 d formed on the inner periphery of the opening 13 of the outer cylinder 3 and a male screw 6 d formed on the outer periphery of the plug 6 and screwed into the female screw 13 d is adopted. You can also

本発明は継手本体１が図示例のソケットタイプのものに限られず、エルボあるいはＴ型等のいずれの場合にも同様に適用できる。 The joint body 1 is not limited to the socket type shown in the illustrated example, and can be similarly applied to any case such as an elbow or a T type.

本発明の一実施例の差込み式管継手を接続管差込み前の状態で示す半欠截断面図である。It is a half notched cross-sectional view showing the plug-in type pipe joint of one embodiment of the present invention in a state before inserting the connecting pipe. 図１の差込み式管継手を接続管差込み途中の状態で示す半欠截断面図である。FIG. 2 is a half cutaway cross-sectional view showing the plug-in type pipe joint of FIG. 1 in a state in the middle of connecting pipe connection. 図１の差込み式管継手を接続管差込み完了後の状態で示す半欠截断面図である。FIG. 2 is a half-broken cross-sectional view showing the plug-in type pipe joint of FIG. 1 in a state after completion of connecting pipe insertion. 他の実施例の差込み式管継手を接続管差込み前の状態で示す半欠截断面図である。It is a half notch cross-sectional view which shows the insertion type pipe joint of another Example in the state before connecting pipe insertion. 図４の差込み式管継手を接続管差込み途中の状態で示す半欠截断面図である。FIG. 5 is a half-cut cross-sectional view showing the plug-in type pipe joint of FIG. 4 in a state in the middle of connecting pipe connection. 図４の差込み式管継手を接続管差込み完了後の状態で示す半欠截断面図である。FIG. 5 is a half-broken cross-sectional view showing the plug-in type pipe joint of FIG. 4 in a state after the connection pipe insertion is completed. 従来例の差込み式管継手の分解斜視図である。It is a disassembled perspective view of the insertion type pipe joint of a prior art example. 図７の差込み式管継手を接続管挿入前の状態で示す半欠截断面図である。FIG. 8 is a half-cut cross-sectional view showing the plug-in type pipe joint of FIG. 7 in a state before insertion of a connecting pipe.

符号の説明Explanation of symbols

Ｐ接続管
１継手本体
２内筒
３外筒
４シールリング
７流体通路
８接続管差込間隙
１４挿入ガイドリング
１５ガイドリング進入空間部
２１シールリング嵌合溝
Ｍ目印
２２目印用Ｏリング P Connection pipe 1 Joint body 2 Inner cylinder 3 Outer cylinder 4 Seal ring 7 Fluid passage 8 Connection pipe insertion gap 14 Insertion guide ring 15 Guide ring entry space 21 Seal ring fitting groove M Marking 22 Marking O-ring

Claims

内部に流体通路を軸心方向に貫通状に形成した継手本体の軸心方向一端部に、前記流体通路と連通する流体連通路を有する内筒と、前記継手本体とは別体に形成され、前記内筒の外周面との間で接続管の端部を受け入れる接続管差込間隙を形成する透明若しくは半透明な外筒とを備えており、前記内筒又は外筒に、前記接続管の端部と前記内筒又は外筒との間をシールするためのシールリングを嵌め込み、前記外筒内には、前記接続管差込間隙に挿入される接続管の一端部で押されるに伴い前記シールリングを圧縮しながら前記接続管差込間隙の内奥方向へ向けて移動する挿入ガイドリングを備えている差込み式管継手において、
前記外筒の軸心方向内方の基端部側と前記内筒の外周との間に、前記挿入ガイドリングが入り込むガイドリング進入空間部を前記接続管差込間隙の内奥部と連通状に形成しており、該ガイドリング進入空間部の軸心方向深さは、前記挿入ガイドリングの軸心方向長さと同一か、それよりも少し深く形成しており、
前記ガイドリング進入空間部に面する前記内筒の外周に、確認用の目印をつけていることを特徴とする、差込み式管継手。 An inner cylinder having a fluid communication passage communicating with the fluid passage is formed separately from the joint main body at one end in the axial direction of the joint main body in which the fluid passage is formed so as to penetrate in the axial direction inside, A transparent or translucent outer cylinder that forms a connecting pipe insertion gap that receives an end of the connecting pipe with the outer peripheral surface of the inner cylinder, and the inner cylinder or the outer cylinder includes the connecting pipe A seal ring for sealing between the end portion and the inner cylinder or the outer cylinder is fitted, and the outer cylinder is inserted with the one end of the connection pipe inserted into the connection pipe insertion gap. In the plug-in type pipe joint provided with the insertion guide ring that moves toward the inner depth direction of the connection pipe insertion gap while compressing the seal ring,
A guide ring entry space portion into which the insertion guide ring enters is communicated with the inner back portion of the connection pipe insertion gap between the axially inner base end side of the outer tube and the outer periphery of the inner tube. The axial depth of the guide ring entry space is the same as or slightly deeper than the axial length of the insertion guide ring,
An insertion-type pipe joint, characterized in that a confirmation mark is provided on the outer periphery of the inner cylinder facing the guide ring entry space.

前記目印が塗装、印刷、又は貼付されたシール、テープ、ステッカーによって形成されている、請求項１記載の差込み式管継手。 The plug-in type pipe joint according to claim 1, wherein the mark is formed by a seal, a tape, or a sticker that is painted, printed, or affixed.

前記目印が前記内筒の外周に嵌め込まれ、前記挿入ガイドリングが外嵌可能な目印用Ｏリングによって形成されている、請求項１記載の差込み式管継手。 The plug-in type pipe joint according to claim 1, wherein the mark is fitted on an outer periphery of the inner cylinder, and the insertion guide ring is formed by a mark O-ring that can be fitted externally.

前記目印用Ｏリングには、前記内筒の色彩とは異なる着色を施している、請求項３記載の差込み式管継手。 The plug-in type pipe joint according to claim 3, wherein the mark O-ring is colored differently from the color of the inner cylinder.

前記挿入ガイドリングには前記接続管の外表面および前記目印の色彩とは異なる着色を施している、請求項１ないし４のいずれか１項に記載の差込み式管継手。 The plug-in type pipe joint according to any one of claims 1 to 4, wherein the insertion guide ring is colored differently from an outer surface of the connection pipe and a color of the mark.