JP5330681B2

JP5330681B2 - Fitting joint parts and piping structure

Info

Publication number: JP5330681B2
Application number: JP2007316834A
Authority: JP
Inventors: 和博内村; 剛原田
Original assignee: Bridgestone Corp
Current assignee: Bridgestone Corp
Priority date: 2007-12-07
Filing date: 2007-12-07
Publication date: 2013-10-30
Anticipated expiration: 2027-12-07
Also published as: JP2009138869A

Description

本発明は、主に給水給湯用に用いられる樹脂管を接続するための管継手同士を連結する管継手連結部品、及びこの管継手連結部品を用いて管継手同士を連結して構成される配管構造体に関する。 The present invention relates to a pipe joint connecting part for connecting pipe joints for connecting resin pipes mainly used for water supply and hot water, and a pipe configured by connecting pipe joints using this pipe joint connecting part. Concerning the structure.

従来、樹脂製の管体（以下、樹脂管）用の管継手同士を非常に短い間隔で連結する場合には、連結部品として短く切断した樹脂管を用いていた。しかし、樹脂管の切断作業が施工現場で行われる場合には、外面（特に管継手との接続部分）に傷を付けない、切断面を潰さない、切断面周囲に切屑を残さない、などに注意を払いながら作業をする必要があるため、施工が煩雑となる問題があった。また、連結部品には管継手同士を支点にして曲げ応力が集中しやすく、樹脂管ではこの曲げ応力に対して十分な曲げ強度を確保することが難しいため、応力が集中しやすい部分が変形する虞があった。 Conventionally, when connecting pipe joints for resin pipe bodies (hereinafter referred to as resin pipes) at very short intervals, resin pipes that have been cut short have been used as connecting parts. However, if the resin pipe is cut at the construction site, the outer surface (particularly the connection with the pipe joint) will not be scratched, the cut surface will not be crushed, and chips will not be left around the cut surface. Since it is necessary to work while paying attention, there is a problem that the construction becomes complicated. Also, bending stress tends to concentrate on connecting parts with the pipe joints as fulcrums, and it is difficult to secure sufficient bending strength against this bending stress in resin pipes, so the part where stress tends to concentrate deforms. There was a fear.

これらの問題点を解決するために特許文献１では、管継手同士を連結する連結部品として金属製のコネクター連結管を提案している。しかし、金属製のコネクター連結管は曲げ強度に優れるが重く、また、給水給湯用に使用するには、鉛浸出基準（平成９年厚生省令第１４号第二条）等の水質基準をクリアするためにＮＰｂ処理等の鉛溶出低減技術を施す必要がある。
そのため、市場では、軽量な連結部品が望まれているが、前述のように樹脂管では十分な曲げ強度を確保することが難しい課題がある。
特開平１１−２６４４９２号公報 In order to solve these problems, Patent Document 1 proposes a metal connector connecting pipe as a connecting part for connecting pipe joints. However, metal connector connection pipes are superior in bending strength but heavy, and in order to be used for hot water supply, water quality standards such as lead leaching standards (1997 Ministry of Health and Welfare Ordinance No. 14, Article 2) are cleared. Therefore, it is necessary to apply lead elution reduction technology such as NPb treatment.
For this reason, in the market, lightweight connection parts are desired. However, as described above, there is a problem that it is difficult to ensure sufficient bending strength with a resin pipe.
JP-A-11-264492

本発明は上記事実を考慮し、軽量且つ、十分な曲げ強度を確保する管継手連結部品を提供することを課題とする。また、この管継手連結部品を用いて管継手同士を連結して構成される配管構造体を提供することを課題とする。 In view of the above facts, an object of the present invention is to provide a pipe joint connecting part that is lightweight and ensures sufficient bending strength. Moreover, it makes it a subject to provide the piping structure comprised by connecting pipe joints using this pipe joint connection component.

上記課題を解決するために請求項１に記載の管継手連結部品は、管体を接続するための管体接続部を有する管継手同士を連結する管継手連結部品であって、両端部分が前記管体接続部に接続可能な少なくとも一部が樹脂製の連結管体と、前記連結管体の内周面に一体的に形成され、前記連結管体の周方向に沿って延びるリブと、を備え、前記管体接続部は、前記管体を挿入するための挿入部と、前記挿入部に挿入した前記管体の内周面に密着して前記管体と前記管体接続部との間をシールする環状の止水部材とを有し、前記連結管体の両端部分の外周面には、軸方向に延びる検査溝が軸方向の両側に形成されている。 In order to solve the above-mentioned problem, the pipe joint connecting part according to claim 1 is a pipe joint connecting part that connects pipe joints having a pipe connecting part for connecting pipes, and both end portions are the above-mentioned parts. a connecting pipe body at least a portion connectable to a tube connecting portion made of resin, formed integrally with the inner peripheral surface of the connecting tube, and the rib extending along the circumferential direction of the connecting tube, the The tube connection portion includes an insertion portion for inserting the tube body, and an inner peripheral surface of the tube body inserted into the insertion portion so as to be in close contact with the tube body and the tube connection portion. An inspection groove extending in the axial direction is formed on both sides in the axial direction on the outer peripheral surfaces of both end portions of the connecting pipe body .

請求項１に記載の管継手連結部品では、連結管体の少なくとも一部が樹脂製のため従来の金属製の連結管と対比して軽量となる。また、連結管体の内周面に連結管体の周方向に沿って延びるリブが形成されるため、このようなリブが形成されない樹脂管（管体）と対比して厚肉となり、十分な曲げ強度を確保することができる。従って、連結管体を用いて管継手同士を連結した後で、連結管体に曲げ応力が作用した際の連結管体の変形が抑制又は防止される。
また、請求項１に記載の管継手連結部品では、内面シールタイプの管継手の挿入部に連結管体を挿入することで、連結管体の内周面に止水部材が密着して連結管体と管体接続部との間がシールされる。
さらに、請求項１に記載の管継手連結部品は、連結対象を内面シールタイプの管継手としている。このため、連結管体の外周面に軸方向に延びる検査溝を形成することで、誤って外面シールタイプの管継手に連結した場合に、外面シールタイプの管継手の止水部材では検査溝が十分にシールされず、後工程の漏水検査で流体が検査溝から漏れ出す。これにより、連結管体を誤った管継手に連結しているか、いないかを容易に判断することができる。
請求項２に記載の発明は、管体を接続するための管体接続部を有する管継手同士を連結する管継手連結部品であって、両端部分が前記管体接続部に接続可能な少なくとも一部が樹脂製の連結管体と、前記連結管体の内周面に一体的に形成され、前記連結管体の周方向に沿って延びるリブと、を備え、前記管体接続部は、前記管体を挿入するための挿入部と、前記挿入部に挿入した前記管体の外周面に密着して前記管体と前記管体接続部との間をシールする環状の止水部材とを有し、前記連結管体の両端部分の内周面には、軸方向に延びる検査溝が形成されている。
請求項２に記載の管継手連結部品では、連結管体の少なくとも一部が樹脂製のため従来の金属製の連結管と対比して軽量となる。また、連結管体の内周面に連結管体の周方向に沿って延びるリブが形成されるため、このようなリブが形成されない樹脂管（管体）と対比して厚肉となり、十分な曲げ強度を確保することができる。従って、連結管体を用いて管継手同士を連結した後で、連結管体に曲げ応力が作用した際の連結管体の変形が抑制又は防止される。
また、請求項２に記載の管継手連結部品では、外面シールタイプの管継手の挿入部に連結管体を挿入することで、連結管体の外周面に止水部材が密着して連結管体と管体接続部との間がシールされる。
さらに、請求項２に記載の管継手連結部品は、連結対象を外面シールタイプの管継手としている。このため、連結管体の内周面に軸方向に延びる検査溝を形成することで、誤って内面シールタイプの管継手に連結した場合に、内面シールタイプの管継手の止水部材では検査溝が十分にシールされず、後工程の漏水検査で流体が検査溝から漏れ出す。これにより、連結管体を誤った管継手に連結しているか、いないかを容易に判断することができる。 In the pipe joint connecting component according to the first aspect, since at least a part of the connecting pipe body is made of resin, it is lighter than a conventional metal connecting pipe. Moreover, since the rib extended along the circumferential direction of a connection pipe body is formed in the internal peripheral surface of a connection pipe body, it becomes thick compared with the resin pipe (tube body) in which such a rib is not formed, and sufficient Bending strength can be ensured. Therefore, after connecting a pipe joint using a connection pipe body, a deformation | transformation of a connection pipe body when bending stress acts on a connection pipe body is suppressed or prevented.
In the pipe joint connecting part according to claim 1, the water stop member is brought into close contact with the inner peripheral surface of the connection pipe body by inserting the connection pipe body into the insertion portion of the inner surface seal type pipe joint. There is a seal between the body and the tube connection.
Furthermore, the pipe joint connection component of Claim 1 makes the connection object the internal seal type pipe joint. For this reason, when an inspection groove extending in the axial direction is formed on the outer peripheral surface of the connecting pipe body, when the inspection pipe is accidentally connected to the outer seal type pipe joint, the inspection groove is not provided in the water sealing member of the outer seal type pipe joint. Insufficient sealing, fluid leaks from the inspection groove in the water leakage inspection in the subsequent process. Thereby, it can be easily determined whether the connecting pipe body is connected to an incorrect pipe joint.
Invention of Claim 2 is a pipe joint connection component which connects the pipe joints which have the pipe body connection part for connecting a pipe body, Comprising: At least 1 which can connect both ends to the said pipe body connection part A connecting pipe body made of resin, and a rib formed integrally with an inner peripheral surface of the connecting pipe body and extending along a circumferential direction of the connecting pipe body, An insertion portion for inserting a tubular body, and an annular water stop member that is in close contact with the outer peripheral surface of the tubular body inserted into the insertion portion and seals between the tubular body and the tubular body connection portion. And the inspection groove | channel extended in an axial direction is formed in the internal peripheral surface of the both ends of the said connection pipe body.
In the pipe joint connecting part according to the second aspect, since at least a part of the connecting pipe body is made of resin, it is lighter than a conventional metal connecting pipe. Moreover, since the rib extended along the circumferential direction of a connection pipe body is formed in the internal peripheral surface of a connection pipe body, it becomes thick compared with the resin pipe (tube body) in which such a rib is not formed, and sufficient Bending strength can be ensured. Therefore, after connecting a pipe joint using a connection pipe body, a deformation | transformation of a connection pipe body when bending stress acts on a connection pipe body is suppressed or prevented.
In the pipe joint connecting component according to claim 2, the water stop member is brought into close contact with the outer peripheral surface of the connection pipe body by inserting the connection pipe body into the insertion portion of the outer seal type pipe joint. And the tube connecting portion are sealed.
Furthermore, the pipe joint connection component of Claim 2 makes the connection object the external surface seal type pipe joint. For this reason, when an inspection groove extending in the axial direction is formed on the inner peripheral surface of the connecting pipe body, and the water seal member of the inner surface seal type pipe joint is erroneously connected to the inner surface seal type pipe joint, the inspection groove is not provided. Is not sufficiently sealed, and fluid leaks from the inspection groove in the water leakage inspection in the subsequent process. Thereby, it can be easily determined whether the connecting pipe body is connected to an incorrect pipe joint.

請求項３に記載の管継手連結部品は、請求項１または請求項２に記載の管継手連結部品において、前記連結管体の両端部に前記管継手を接続した状態で、両側の前記管継手間の中間部分に前記リブが配置されることを特徴としている。 The pipe joint connecting part according to claim 3 is the pipe joint connecting part according to claim 1 or 2 , wherein the pipe joints on both sides of the pipe joint connecting part are connected to both ends of the connecting pipe body. The ribs are arranged in an intermediate portion between them.

連結管体の両端部に管継手を接続した状態、すなわち連結管体を用いて管継手同士を連結した状態で、管継手を支点とした曲げ応力を連結管体に作用させた場合に、曲げ応力は両側の管継手間の中間部分に集中しやすい。
ここで、請求項３に記載の管継手連結部品では、連結管体の曲げ応力が集中しやすい部分にリブを配置して曲げ強度を向上させている。これにより、曲げ応力による連結管体の変形を効果的に抑制又は防止することができる。 When the pipe joint is connected to both ends of the connecting pipe, that is, when the pipe joint is connected to each other using the connecting pipe, bending stress with the pipe joint as a fulcrum is applied to the connecting pipe. Stress tends to concentrate in the middle part between the pipe joints on both sides.
Here, in the pipe joint connecting component according to the third aspect, the bending strength is improved by arranging the ribs in the portion where the bending stress of the connecting pipe body tends to concentrate. Thereby, a deformation | transformation of the connection pipe body by bending stress can be suppressed or prevented effectively.

ところで、一般的な管継手の種類としては、挿入部に挿入された管体の内周面に止水部材を密着させて該管体と管継手との間をシールする内面シールタイプの管継手及び、挿入部に挿入された管体の外周面に止水部材を密着させて該管体と管継手との間をシールする外面シールタイプの管継手がある。 By the way, as a general type of pipe joint, an inner surface seal type pipe joint that seals between the pipe body and the pipe joint by bringing a water-stopping member into close contact with the inner peripheral surface of the pipe body inserted into the insertion portion. In addition, there is an outer surface seal type pipe joint in which a water stop member is brought into close contact with an outer peripheral surface of a pipe body inserted into an insertion portion to seal between the pipe body and the pipe joint.

請求項４に記載の管継手連結部品は、請求項１〜請求項３の何れか１項に記載の管継手連結部品において、前記連結管体の軸方向の長さは、前記管継手と前記連結管体とが嵌合する長さの２倍の長さと、１２ｍｍ以下の長さと、を足したものであることを特徴としている。 The pipe joint connecting part according to claim 4 is the pipe joint connecting part according to any one of claims 1 to 3 , wherein the axial length of the connecting pipe body is the same as the pipe joint and the pipe joint connecting part. It is characterized by adding a length twice as long as the connecting pipe body is fitted to and a length of 12 mm or less.

請求項４に記載の管継手連結部品では、連結管体の軸方向の長さが、管継手と連結管体とが嵌合する長さの２倍の長さと、１２ｍｍ以下の長さと、を足したものであることから、管継手同士の連結間隔を短くすることができる。 In the pipe joint connecting component according to claim 4, the length in the axial direction of the connection pipe body is twice as long as the pipe joint and the connection pipe body are fitted, and a length of 12 mm or less. Since it is what was added, the connection space | interval of pipe joints can be shortened.

請求項５に記載の管継手連結部品は、請求項１〜請求項４の何れか１項に記載の管継手連結部品において、前記リブが前記連結管体の内周面に形成される場合において、前記リブの高さが０．５ｍｍ以上、且つ前記連結管体のリブ部分の内径寸法が前記管継手の最小内径寸法以上を満たすことを特徴としている。 The pipe joint connecting part according to claim 5 is the pipe joint connecting part according to any one of claims 1 to 4 , wherein the rib is formed on an inner peripheral surface of the connecting pipe body. The rib height is 0.5 mm or more, and the inner diameter dimension of the rib portion of the connecting pipe body satisfies the minimum inner diameter dimension of the pipe joint.

請求項５に記載の管継手連結部品では、リブの高さが０．５ｍｍ未満の場合には管継手連結部品の曲げ強度の向上代が少なく、リブ部分の内径寸法が管継手の最小内径寸法未満の場合には、このリブ部分で乱流が生じる虞がある。従って、リブは、リブの高さが０．５ｍｍ以上、且つ連結管体のリブ部分の内径寸法が管継手の最小内径寸法以上を満たすことが好ましい。 In the pipe joint connecting part according to claim 5, when the height of the rib is less than 0.5 mm, the margin for improving the bending strength of the pipe joint connecting part is small, and the inner diameter dimension of the rib portion is the minimum inner diameter dimension of the pipe joint. If it is less, turbulent flow may occur in the rib portion. Therefore, it is preferable that the rib has a rib height of 0.5 mm or more and the inner diameter dimension of the rib portion of the connecting pipe body satisfies the minimum inner diameter dimension of the pipe joint.

請求項６に記載の管継手連結部品は、請求項１〜請求項５の何れか１項に記載の管継手連結部品において、前記管体接続部は、前記管体が前記挿入部に挿入されると弾性変形して前記管体の外周面を押圧し、挿入された前記管体に抜き出し方向の力が作用したときに先端部が前記管体の外周面に喰い込んで前記管体の抜き出しを阻止する弾性変形可能な爪部を備え、前記連結管体の外周面に、前記連結管体を前記挿入部に挿入したときに、前記爪部を引掛け可能な引掛溝を形成することを特徴としている。 The pipe joint connecting part according to claim 6 is the pipe joint connecting part according to any one of claims 1 to 5 , wherein the pipe connecting part is inserted into the insertion part. Then, it is elastically deformed, presses the outer peripheral surface of the tubular body, and when a force in the pulling direction acts on the inserted tubular body, the tip portion bites into the outer peripheral surface of the tubular body and pulls out the tubular body. A hooking groove that can be hooked to the claw when the connecting pipe is inserted into the insertion part, on the outer peripheral surface of the connecting pipe. It is a feature.

請求項６に記載の管継手連結部品では、管継手の挿入部に連結管体を挿入すると、爪部が引掛溝に引っ掛かる。このため、連結管体に抜き出し方向の力が作用したときに、確実に爪部の先端部を連結管体に喰い込ませることができ、管体の外周面に爪部の先端部を喰い込ませるよりも、連結管体の抜き出しを効果的に阻止することができる。 In the pipe joint connecting part according to the sixth aspect, when the connecting pipe is inserted into the insertion part of the pipe joint, the claw part is caught in the catching groove. For this reason, when the force in the extraction direction acts on the connecting tube, the tip of the claw can be securely bited into the connecting tube, and the tip of the claw can be bitten into the outer peripheral surface of the tube. It is possible to effectively prevent the connection pipe body from being pulled out.

請求項７に記載の管継手連結部品は、請求項１〜請求項６の何れか１項に記載の管継手連結部品において、前記連結管体の外周面に複数の凹及び複数の凸の少なくとも一方からなる滑り止め部を形成することを特徴としている。 Pipe joint coupling component according to claim 7, in the pipe joint connection component according to any one of claims 1 to 6, a plurality of concave and a plurality of convex to the outer peripheral surface of the connecting tube at least It is characterized by forming a non-slip portion consisting of one side.

請求項７に記載の管継手連結部品では、管継手の挿入部に連結管体を挿入する挿入作業、及び連結管体を管継手から引き抜く引抜作業時に、滑り止め部が滑り止めとなるため作業者の挿入作業、及び引抜作業が容易になる。 In the pipe joint connecting part according to claim 7, since the anti-slip part becomes non-slip at the time of insertion work for inserting the connection pipe body into the insertion part of the pipe joint and pulling out work for pulling out the connection pipe body from the pipe joint. The user can easily insert and pull out.

請求項８に記載の管継手連結部品は、請求項１〜請求項７の何れか１項に記載の管継手連結部品において、前記連結管体が工業的生産過程において生産されることを特徴としている。 The pipe joint connecting part according to claim 8 is the pipe joint connecting part according to any one of claims 1 to 7 , wherein the connecting pipe is produced in an industrial production process. Yes.

請求項８に記載の管継手連結部品では、連結管体が射出成形、切削加工等の工業的生産過程において生産される。これにより、施工現場で樹脂管を切断して連結部品を製造するよりも、高品質の連結部品が得られる。また、連結管体は予め工業的生産過程において生産されることから、施工現場で樹脂管を切断する切断作業が不要となるため、切断作業が必要な場合と対比して、施工の煩雑さを解消することができ、さらに、施工時間を短縮することもできる。 In the pipe joint connecting part according to the eighth aspect , the connecting pipe is produced in an industrial production process such as injection molding or cutting. As a result, it is possible to obtain a high-quality connecting component, rather than cutting the resin pipe at the construction site to manufacture the connecting component. In addition, since the connecting pipe is produced in advance in the industrial production process, the cutting work for cutting the resin pipe at the construction site is not necessary, so that the construction is less complicated than when the cutting work is required. It can be eliminated, and the construction time can be shortened.

請求項９に記載の管継手連結部品は、請求項１〜請求項８の何れか１項に記載の管継手連結部品において、前記連結管体の一端部と他端部とが同径であることを特徴としている。 The pipe joint connecting part according to claim 9 is the pipe joint connecting part according to any one of claims 1 to 8 , wherein one end and the other end of the connecting pipe body have the same diameter. It is characterized by that.

請求項９に記載の管継手連結部品では、連結管体の一端部と他端部とに同じサイズの管継手を連結することができる。つまり、連結管体の両端部の呼び径が同一であることを意味する。 In the pipe joint connecting part according to claim 9, pipe joints of the same size can be connected to one end and the other end of the connecting pipe body. That is, it means that the nominal diameters at both ends of the connecting pipe body are the same.

請求項１０に記載の管継手連結部品は、請求項１〜請求項８の何れか１項に記載の管継手連結部品において、前記連結管体の一端部と他端部とが異径であることを特徴としている。 The pipe joint connecting part according to claim 10 is the pipe joint connecting part according to any one of claims 1 to 8 , wherein one end and the other end of the connecting pipe body have different diameters. It is characterized by that.

請求項１０に記載の管継手連結部品では、連結管体の一端部と他端部とに異なるサイズの管継手を連結することができる。このため、配管接続部が全て同径の同径管継手のみの持ち合わせでも、本請求項の管継手連結部品を用いれば、異径サイズの管体同士を連結することができる。さらに、管継手の品揃えを減らすことができ、コストダウンが可能となる。 In the pipe joint connecting component according to the tenth aspect, pipe joints of different sizes can be connected to one end and the other end of the connecting pipe body. For this reason, even if it has only the pipe joint part with the same diameter and the same diameter pipe joint, if the pipe joint connection component of this claim is used, the pipe bodies of different diameter sizes can be connected. Furthermore, the assortment of pipe joints can be reduced, and the cost can be reduced.

請求項１１に記載の配管構造体は、請求項１〜請求項９の何れか１項に記載の管継手連結部品を用いて前記管継手同士を連結して構成されることを特徴としている。 A pipe structure according to an eleventh aspect is characterized in that the pipe joints are connected to each other using the pipe joint connecting part according to any one of the first to ninth aspects .

請求項１１に記載の配管構造体では、請求項１〜請求項９の何れか１項に記載の管継手連結部品が十分な耐曲げ強度を確保することから、配管構造体に曲げ応力が作用しても管継手連結部品の変形が抑制又は防止される。つまり、配管構造体の変形が抑制又は防止される。 In the piping structure according to claim 11, since the pipe joint connecting part according to any one of claims 1 to 9 ensures sufficient bending strength, bending stress acts on the piping structure. Even so, deformation of the pipe joint connecting component is suppressed or prevented. That is, the deformation of the piping structure is suppressed or prevented.

本発明の管継手連結部品は上記構成としたので、軽量且つ、十分な曲げ強度を確保することができる。また、本発明の配管構造体は上記構成としたので、配管構造体に曲げ応力が作用しても管継手連結部品の変形が抑制又は防止されるため、配管構造体の変形を抑制又は防止することができる。 Since the pipe joint connecting component of the present invention has the above-described configuration, it is possible to ensure light weight and sufficient bending strength. Moreover, since the piping structure of the present invention has the above-described configuration, the deformation of the pipe joint connecting part is suppressed or prevented even when bending stress acts on the piping structure, so that the deformation of the piping structure is suppressed or prevented. be able to.

（第１の実施形態）
以下、図面を参照して本発明の管継手連結部品、及び配管構造体の第１の実施形態について詳細に説明する。まず、第１の実施形態の管継手連結部品７０を用いて連結する管継手１２について詳細に説明する。なお、本実施形態の配管構造体１０は、管継手連結部品７０と、この管継手連結部品７０によって連結される両側の管継手１２によって構成される。 (First embodiment)
Hereinafter, a pipe joint connecting part and a piping structure according to a first embodiment of the present invention will be described in detail with reference to the drawings. First, the pipe joint 12 connected using the pipe joint connecting component 70 of the first embodiment will be described in detail. In addition, the piping structure 10 of this embodiment is comprised by the pipe joint connection component 70 and the pipe joint 12 of the both sides connected by this pipe joint connection component 70. FIG.

（管継手）
図４には、管継手１２の中心軸方向に沿った部分断面図が示されている。本実施形態の管継手１２は、中心線ＣＬを挟んで左右対称のため片側のみを説明し、他側の説明を省略する。なお、図４の矢印Ｂは管継手１２の中心軸Ｋ１方向と平行で且つ中心線ＣＬに向かう方向を示し、矢印Ｆは管継手１２の中心軸Ｋ１方向と平行で且つ中心線ＣＬから離れる方向（矢印Ｂの反対方向）を示している。 (Fitting)
FIG. 4 shows a partial cross-sectional view of the pipe joint 12 along the central axis direction. Since the pipe joint 12 of the present embodiment is symmetrical with respect to the center line CL, only one side will be described, and description on the other side will be omitted. 4 indicates a direction parallel to the central axis K1 direction of the pipe joint 12 and toward the center line CL, and an arrow F indicates a direction parallel to the central axis K1 direction of the pipe joint 12 and away from the center line CL. (Opposite direction of arrow B).

管継手１２は、本体１４、スリーブ１６、中間リング１８、係合解除部材２０、ロックリング５２、及び止水部材としてのＯリング２２を備え、これらの部材は互いに中心軸を一致させて配置されている。なお、本実施形態では本体１４、スリーブ１６、中間リング１８、及び係合解除部材２０を合成樹脂製とするが、これらの部材は合成樹脂以外の材料から構成されてもよいものとする。 The pipe joint 12 includes a main body 14, a sleeve 16, an intermediate ring 18, a disengagement member 20, a lock ring 52, and an O-ring 22 as a water stop member, and these members are arranged with their central axes coinciding with each other. ing. In the present embodiment, the main body 14, the sleeve 16, the intermediate ring 18, and the disengagement member 20 are made of synthetic resin. However, these members may be made of a material other than the synthetic resin.

本体１４は略筒状とされ、矢印Ｆ方向側が一般的な樹脂管Ｐ（図４では二点鎖線で表示）に挿入可能なコア部２６とされている。このコア部２６の外周面に一対の嵌挿溝３６が形成され、Ｏリング２２が夫々嵌め込まれている。このＯリング２２は、コア部２６が樹脂管Ｐに挿入されると、樹脂管Ｐの内周面に密着し、樹脂管Ｐと本体１４との間をシールする。また、本体１４の外周の中心軸Ｋ１方向の中央部分には、コア部２６よりも径が大とされた突起部２８が形成されている。 The main body 14 has a substantially cylindrical shape, and the arrow F direction side is a core portion 26 that can be inserted into a general resin pipe P (indicated by a two-dot chain line in FIG. 4). A pair of insertion grooves 36 are formed on the outer peripheral surface of the core portion 26, and the O-rings 22 are respectively fitted therein. When the core portion 26 is inserted into the resin tube P, the O-ring 22 is in close contact with the inner peripheral surface of the resin tube P and seals between the resin tube P and the main body 14. In addition, a projection 28 having a diameter larger than that of the core 26 is formed at the center of the outer periphery of the main body 14 in the direction of the central axis K1.

中間リング１８は略筒状とされ、且つ内周面の中心軸Ｋ１方向の中央部分に環状の溝４０が形成されており、本体１４の外周側に配置されている。この中間リング１８と本体１４とは二色成形で成形されており、突起部２８が溝４０に入り込むようにして一体化している。なお、中間リング１８の内周面、コア部２６の外周面、及び突起部２８の軸方向の壁面４１によって形成される中空部（挿入部３８）は、樹脂管Ｐを挿入可能な大きさに設定されている。また、中間リング１８の外周面の矢印Ｆ方向側には、凹凸状とされたスリーブ係合部４２が形成されている。 The intermediate ring 18 has a substantially cylindrical shape, and an annular groove 40 is formed in the central portion of the inner peripheral surface in the direction of the central axis K 1, and is disposed on the outer peripheral side of the main body 14. The intermediate ring 18 and the main body 14 are formed by two-color molding, and are integrated so that the protruding portion 28 enters the groove 40. The hollow portion (insertion portion 38) formed by the inner peripheral surface of the intermediate ring 18, the outer peripheral surface of the core portion 26, and the axial wall surface 41 of the projection portion 28 is sized so that the resin pipe P can be inserted. Is set. Further, an uneven sleeve engaging portion 42 is formed on the outer peripheral surface of the intermediate ring 18 in the direction of arrow F.

スリーブ１６は略筒状とされ、且つ内周面の矢印Ｂ方向側にスリーブ係合部４２と嵌合可能な凹凸状の被係合部４４が形成されており、この被係合部４４にスリーブ係合部４２が嵌合されて中間リング１８の矢印Ｆ方向側に配置されている。スリーブ１６の被係合部４４よりも矢印Ｆ方向側には、矢印Ｆ方向へ向かうに従って内径が縮小する傾斜部４６、一定内径の第１の一定径部４８、及び第１の一定径部４８よりも内径が小径の第２の一定径部５０が順次形成されている。 The sleeve 16 has a substantially cylindrical shape, and an uneven engagement portion 44 that can be fitted to the sleeve engagement portion 42 is formed on the inner peripheral surface in the arrow B direction side. The sleeve engaging portion 42 is fitted and arranged on the arrow F direction side of the intermediate ring 18. In the direction of arrow F from the engaged portion 44 of the sleeve 16, an inclined portion 46 whose inner diameter decreases as it goes in the direction of arrow F, a first constant diameter portion 48 having a constant inner diameter, and a first constant diameter portion 48. The second constant diameter portion 50 having an inner diameter smaller than that is formed sequentially.

ロックリング５２は略リング状とされ、スリーブ１６の傾斜部４６の内周側、且つ中間リング１８と後述する係合解除部材２０との間に配置されている。このロックリング５２は周方向に間隔をあけて内側へ突出する弾性変形可能な爪部５３を複数備えており、この爪部５３の先端部を通る仮想円の径が樹脂管Ｐの外径よりも若干小径に設定されている。 The lock ring 52 has a substantially ring shape, and is disposed on the inner peripheral side of the inclined portion 46 of the sleeve 16 and between the intermediate ring 18 and a disengagement member 20 described later. The lock ring 52 includes a plurality of elastically deformable claw portions 53 that protrude inwardly at intervals in the circumferential direction, and the diameter of a virtual circle that passes through the tip of the claw portion 53 is larger than the outer diameter of the resin pipe P. Is also set slightly smaller.

係合解除部材２０は、内径が樹脂管Ｐの外径よりも若干大径の略筒状とされ、スリーブ１６の内周側に中心軸Ｋ１方向に移動可能に配置されている。この係合解除部材２０は、矢印Ｂ方向側に爪部５３を押圧するための押圧部５４、及び押圧部５４よりも矢印Ｆ方向側に一定外径部分５６を備えている。 The disengagement member 20 has a substantially cylindrical shape whose inner diameter is slightly larger than the outer diameter of the resin pipe P, and is disposed on the inner peripheral side of the sleeve 16 so as to be movable in the direction of the central axis K1. The disengagement member 20 includes a pressing portion 54 for pressing the claw portion 53 on the arrow B direction side, and a constant outer diameter portion 56 on the arrow F direction side of the pressing portion 54.

（管継手連結部品）
図１には、第１の実施形態の管継手連結部品７０の中心軸方向に沿った部分断面図が示されている。管継手連結部品７０は、中心線ＳＬを挟んで左右対称のため片側のみを説明し、他側の説明を省略する。また、図１中の矢印Ｂは管継手連結部品７０の中心軸Ｋ２方向と平行で且つ中心線ＳＬに向かう方向を示し、矢印Ｆは管継手連結部品７０の中心軸Ｋ２方向と平行で且つ中心線ＳＬから離れる方向（矢印Ｂの反対方向）を示している。 (Fitting joint parts)
FIG. 1 shows a partial cross-sectional view along the central axis direction of the pipe joint connecting component 70 of the first embodiment. Since the pipe joint connecting component 70 is symmetrical with respect to the center line SL, only one side will be described and description on the other side will be omitted. 1 indicates a direction parallel to the center axis K2 direction of the pipe joint connecting component 70 and toward the center line SL, and an arrow F is parallel to the center axis K2 direction of the pipe joint connecting component 70 and the center. The direction away from the line SL (the direction opposite to the arrow B) is shown.

管継手連結部品７０は、射出成形、切削加工等の工業的生産過程において生産された略筒状の樹脂成形品である連結管体７２を備えている。この連結管体７２の中心軸方向（中心軸Ｋ２方向）の両端部７６側の径は同一径とされるとともに、樹脂管Ｐの径と略同じに設定されている。また、連結管体７２の両端部（端面）７６は、夫々連結管体７２の中心軸Ｋ２に対して直角となるように形成されている。さらに、連結管体７２の内周面７３の中心軸Ｋ２方向の中央部分には、連結管体７２の周方向に沿って延びる環状のリブ７４が形成されている。このリブ７４の突出高さＨ１は、管継手１２の挿入部３８に連結管体７２の端部７６を挿入した際に、コア部２６の先端部２７がリブ７４の中心軸方向の壁面７５に突き当たる程度の高さに設定することが好ましい。ただし、突出高さＨ１が高すぎると、管継手１２同士を連結して流体を流した際に、このリブ７４付近で乱流が生じ騒音原因となる。また、乱流が生じることで損失水頭が大きくなるため、リブ７４の突出高さＨ１は、壁面７５と先端部２７とが接触する範囲で、且つ騒音及び損失水頭が最も小さくなる高さに設定することが好ましい。具体的には、リブ７４の突出高さＨ１が０．５ｍｍ以上、且つ連結管体７２のリブ部分（リブ７４の径方向内側部分）の内径寸法が管継手１２の最小内径寸法以上を満たすことが好ましい。 The pipe joint connecting component 70 includes a connecting pipe body 72 which is a substantially cylindrical resin molded product produced in an industrial production process such as injection molding or cutting. The diameters of both ends 76 in the central axis direction (the direction of the central axis K2) of the connecting pipe body 72 are set to the same diameter and are set to be approximately the same as the diameter of the resin pipe P. Further, both end portions (end surfaces) 76 of the connecting pipe body 72 are formed so as to be perpendicular to the central axis K 2 of the connecting pipe body 72. Furthermore, an annular rib 74 extending along the circumferential direction of the connecting tube 72 is formed at the central portion of the inner peripheral surface 73 of the connecting tube 72 in the direction of the central axis K2. The protrusion height H1 of the rib 74 is such that when the end portion 76 of the connecting pipe body 72 is inserted into the insertion portion 38 of the pipe joint 12, the distal end portion 27 of the core portion 26 faces the wall surface 75 of the rib 74 in the central axis direction. It is preferable to set the height so that it strikes. However, if the protrusion height H1 is too high, turbulent flow is generated near the rib 74 and causes noise when the pipe joints 12 are connected to flow fluid. Further, since the loss head is increased due to the occurrence of turbulent flow, the protrusion height H1 of the rib 74 is set in a range where the wall surface 75 and the tip portion 27 are in contact with each other and the noise and loss head are minimized. It is preferable to do. Specifically, the protrusion height H1 of the rib 74 is 0.5 mm or more, and the inner diameter dimension of the rib portion of the connecting pipe body 72 (the radially inner portion of the rib 74) satisfies the minimum inner diameter dimension of the pipe joint 12. Is preferred.

また、連結管体７２の端部７６とリブ７４の壁面７５との中心軸Ｋ２方向に沿った長さＬ１は、管継手１２の突起部２８の中心軸Ｋ１方向の壁面４１とコア部２６の先端部２７との中心軸Ｋ１方向に沿った長さＬ２と同じ長さに設定することが好ましいが、長さＬ１よりも長さＬ２が若干短くてもよいものとする。ただし、連結管体７２の端部７６を管継手１２の挿入部３８に挿入し、コア部２６の先端部２７がリブ７４の壁面７５に突き当たった際に、端部７６が管継手１２のＯリング２２よりも突起部２８の壁面４１側に位置するように長さＬ１は設定する必要がある。 The length L1 along the direction of the central axis K2 between the end portion 76 of the connecting pipe 72 and the wall surface 75 of the rib 74 is such that the wall surface 41 and the core portion 26 in the direction of the central axis K1 of the protruding portion 28 of the pipe joint 12. It is preferable to set the length L2 to be the same as the length L2 along the direction of the central axis K1 with the tip portion 27, but the length L2 may be slightly shorter than the length L1. However, when the end portion 76 of the connecting pipe body 72 is inserted into the insertion portion 38 of the pipe joint 12 and the distal end portion 27 of the core portion 26 abuts against the wall surface 75 of the rib 74, the end portion 76 becomes the O of the pipe joint 12. The length L1 needs to be set so as to be positioned closer to the wall surface 41 of the protrusion 28 than the ring 22.

図２に示されるように、連結管体７２の外周面７７の両端部７６側には、連結管体７２の周方向に沿って延びる環状の引掛溝７８が形成されている。この引掛溝７８には、図５に示されるように、連結管体７２を管継手１２の挿入部３８に挿入した際にロックリング５２の爪部５３の先端部が入り込む。このため、連結管体７２に抜け出し方向の力が作用した際には、爪部５３の先端部が引掛溝７８の矢印Ｆ方向側の溝壁に確実に引っ掛かり、連結管体７２の抜け出しが阻止される（図６参照）。 As shown in FIG. 2, annular hooking grooves 78 extending along the circumferential direction of the connecting tube body 72 are formed on both end portions 76 of the outer peripheral surface 77 of the connecting tube body 72. As shown in FIG. 5, when the connecting pipe 72 is inserted into the insertion part 38 of the pipe joint 12, the leading end of the claw part 53 of the lock ring 52 enters the hooking groove 78. For this reason, when a force in the pull-out direction acts on the connecting tube 72, the tip of the claw 53 is reliably caught on the groove wall on the arrow F direction side of the hooking groove 78, thereby preventing the connecting tube 72 from being pulled out. (See FIG. 6).

図３に示されるように、連結管体７２の外周面７７には、後述する梨地部８２を挟んで中心軸Ｋ２方向両側に中心軸Ｋ２方向に沿って延びる検査溝８０が形成されている。なお、本実施形態では、検査溝８０が梨地部８２を挟んで中心軸Ｋ２方向両側に中心軸Ｋ２方向に沿って延びているが、本発明はこの構成に限定される必要はなく、検査溝８０が連結管体７２の一端部から他端部へと連続して形成されていてもよく、さらに検査溝８０が複数本形成されてもよいものとする。 As shown in FIG. 3, the outer circumferential surface 77 of the connecting pipe body 72 is formed with inspection grooves 80 extending along the central axis K2 direction on both sides in the central axis K2 direction with a satin portion 82 to be described later interposed therebetween. In the present embodiment, the inspection groove 80 extends along the central axis K2 direction on both sides in the central axis K2 direction with the matte portion 82 interposed therebetween, but the present invention is not limited to this configuration, and the inspection groove 80 may be formed continuously from one end of the connecting tube 72 to the other end, and a plurality of inspection grooves 80 may be formed.

また、図３に示されるように、連結管体７２の外周面７７の中心軸Ｋ２方向の中央部分には、連結管体７２の周方向に沿って滑り止めと、連結管体７２の差し込み確認の目印を兼ねた梨地部８２（滑り止め部）が形成されている。なお、梨地部とは外周面７７に均一な複数の凸凹を形成した部分を指す。 Further, as shown in FIG. 3, the central portion of the outer peripheral surface 77 of the connecting tube body 72 in the direction of the central axis K 2 is prevented from slipping along the circumferential direction of the connecting tube body 72. A satin portion 82 (anti-slip portion) that also serves as a mark is formed. The satin portion refers to a portion where a plurality of uniform irregularities are formed on the outer peripheral surface 77.

（連結手順）
次に、管継手連結部品７０を用いて管継手１２同士を連結する連結手順について説明する。まず、一つ目の管継手１２の挿入部３８に連結管体７２の一方の端部７６を挿入する。このとき、爪部５３が連結管体７２によって押し拡げられる。連結管体７２をさらに挿入すると、爪部５３の先端部が引掛溝７８に至り、爪部５３が復元し、先端部が引掛溝７８に入り込む。そして、連結管体７２をさらに挿入すると、管継手１２のコア部２６の先端部２７がリブ７４の壁面７５に突き当たる（図５参照）。 (Consolidation procedure)
Next, a connection procedure for connecting the pipe joints 12 using the pipe joint connecting component 70 will be described. First, one end 76 of the connecting pipe 72 is inserted into the insertion part 38 of the first pipe joint 12. At this time, the claw 53 is pushed and expanded by the connecting pipe 72. When the connecting tube 72 is further inserted, the tip of the claw 53 reaches the hook groove 78, the claw 53 is restored, and the tip enters the hook groove 78. And if the connection pipe body 72 is further inserted, the front-end | tip part 27 of the core part 26 of the pipe joint 12 will contact | abut the wall surface 75 of the rib 74 (refer FIG. 5).

ここで、管継手連結部品７０と管継手１２との連結作業時に、コア部２６の先端部２７がリブ７４の壁面７５に突き当たるまで連結管体７２を管継手１２に挿入することで、連結管体７２が管継手１２に一定量挿入される。これにより、管継手連結部品７０と管継手１２とが確実に連結される。もちろん、連結状態においては、連結管体７２の端部７６が管継手１２のＯリング２２よりも突起部２８の壁面４１側に位置するため、連結管体７２の内周面７３にＯリング２２が密着する。これにより、連結管体７２と管継手１２との間のシール性が確保される。 Here, when connecting the pipe joint connecting component 70 and the pipe joint 12, the connecting pipe 72 is inserted into the pipe joint 12 until the tip portion 27 of the core portion 26 abuts against the wall surface 75 of the rib 74. A certain amount of the body 72 is inserted into the pipe joint 12. Thereby, the pipe joint connection component 70 and the pipe joint 12 are reliably connected. Of course, in the connected state, the end portion 76 of the connecting pipe body 72 is located closer to the wall surface 41 side of the protruding portion 28 than the O-ring 22 of the pipe joint 12, so that the O-ring 22 is formed on the inner peripheral surface 73 of the connecting pipe body 72. Is in close contact. Thereby, the sealing performance between the connection pipe body 72 and the pipe joint 12 is ensured.

また、爪部５３の先端部が引掛溝７８に入り込んでいるため、連結管体７２に抜け出し方向の力が作用した際には、図６に示されるように、爪部５３の先端部が引掛溝７８の矢印Ｆ方向側の溝壁に確実に引っ掛かるため、樹脂管Ｐの外周面に爪部５３の先端部を喰い込ませるよりも、連結管体７２の抜き出しを効果的に阻止することができる。 Further, since the tip of the claw 53 is inserted into the catching groove 78, when a force in the pull-out direction acts on the connecting tube 72, the tip of the claw 53 is hooked as shown in FIG. In order to be surely hooked to the groove wall on the arrow F direction side of the groove 78, it is possible to effectively prevent the connecting tube body 72 from being pulled out rather than biting the tip of the claw 53 into the outer peripheral surface of the resin pipe P. it can.

さらに、連結管体７２には滑り止めとしての梨地部８２が設けられているため、管継手１２の挿入部３８に連結管体７２を挿入する挿入作業が容易となる。一方、連結管体７２と管継手１２とを連結する際に、施工現場では連結管体７２及び管継手１２の少なくとも一方に潤滑剤を塗布することがあるが、連結管体７２には梨地部８２が形成されているため、潤滑剤が塗布されても挿入作業が難しくなることはない。なお、この梨地部８２は、連結管体７２を管継手１２から引き抜く引抜作業時にも効果を発揮するのはもちろんのことである。またさらに、梨地部８２は、管継手１２の挿入部３８に連結管体７２を挿入する際の目印としても用いることができ、この梨地部８２を目印に連結管体７２を挿入部３８に挿入することで、コア部２６の先端部２７をリブ７４の壁面７５に確実に突き当てることができる。すなわち、管継手連結部品７０と管継手１２とを確実に連結することができる。 Furthermore, since the matte part 82 as a slip stopper is provided in the connection pipe body 72, the insertion operation which inserts the connection pipe body 72 in the insertion part 38 of the pipe joint 12 becomes easy. On the other hand, when connecting the connecting pipe 72 and the pipe joint 12, a lubricant may be applied to at least one of the connecting pipe 72 and the pipe joint 12 at the construction site. Since 82 is formed, the insertion operation does not become difficult even if a lubricant is applied. Of course, the satin portion 82 is also effective when the connecting pipe 72 is pulled out from the pipe joint 12. Furthermore, the matte portion 82 can be used as a mark when the connecting pipe body 72 is inserted into the insertion portion 38 of the pipe joint 12, and the connecting pipe body 72 is inserted into the insertion portion 38 using the matte portion 82 as a mark. By doing so, the front end portion 27 of the core portion 26 can be reliably abutted against the wall surface 75 of the rib 74. That is, the pipe joint connecting component 70 and the pipe joint 12 can be reliably connected.

次に、二つ目の管継手１２の挿入部３８に連結管体７２の他方の端部７６を挿入して、二つ目の管継手１２と連結管体７２とを前述した連結手順で連結する。これにより、管継手連結部品７０によって管継手１２同士が連結される（図５参照）。 Next, the other end 76 of the connecting pipe 72 is inserted into the insertion part 38 of the second pipe joint 12, and the second pipe joint 12 and the connecting pipe 72 are connected by the connecting procedure described above. To do. Thereby, the pipe joints 12 are connected by the pipe joint connecting component 70 (see FIG. 5).

ここで、管継手連結部品７０は、連結管体７２を樹脂成形品としているため従来の金属製の連結管と対比して軽量であり、さらに、連結管体７２の内周面７３にリブ７４が形成されているため、このようなリブが形成されない樹脂管（施工現場で樹脂管Ｐを切断したものなど）と対比して厚肉であり、十分な曲げ強度を確保することができる。従って、連結管体７２を用いて管継手１２同士を連結した後で、連結管体７２に曲げ応力が作用した際の連結管体７２の変形が抑制又は防止される。なお、その他の実施形態では、連結管体７２の外周面７７にリブを形成してもよく、そのリブを管継手連結部品７０の挿入作業、及び引抜作業時の滑り止めとして用いてもよいものとする。 Here, the pipe joint connecting component 70 is light in comparison with a conventional metal connecting pipe because the connecting pipe 72 is a resin molded product, and further, ribs 74 are formed on the inner peripheral surface 73 of the connecting pipe 72. Therefore, it is thicker than a resin pipe (such as one obtained by cutting the resin pipe P at the construction site) in which no rib is formed, and a sufficient bending strength can be ensured. Therefore, after connecting the pipe joints 12 using the connecting pipe body 72, deformation of the connecting pipe body 72 when bending stress acts on the connecting pipe body 72 is suppressed or prevented. In other embodiments, a rib may be formed on the outer peripheral surface 77 of the connecting pipe body 72, and the rib may be used as a slip stopper at the time of inserting and pulling out the pipe joint connecting part 70. And

また、管継手連結部品７０を用いて管継手１２同士を連結した状態で、管継手１２を支点とした曲げ応力を連結管体７２に作用させた場合に、曲げ応力は両側の管継手１２間の中間部分に集中しやすい。このため、連結管体７２の曲げ応力が集中しやすい部分にリブ７４を配置して、曲げ強度を向上させている。これにより、曲げ応力による連結管体７２の変形を効果的に抑制又は防止することができる。ここで、管継手連結部品７０のリブ７４による曲げ強度の向上代を、一例を用いて説明する。例えば、管継手連結部品７０をポリブテン管の呼び径１３に対応させる場合には、ＪＩＳ規格（ＪＩＳＫ６７９２、ＪＩＳＫ６７７８）に従い管継手連結部品７０の外径を１７ｍｍ、内径を１２．８ｍｍとする。このとき、リブ７４の突出高さＨ１を２．９ｍｍに設定すると、リブ部分の肉厚が２．１ｍｍから３．９ｍｍへと厚肉化するため、管継手連結部品７０の曲げ強度が約４０％向上する。また、その他の例として、リブ７４を管継手連結部品７０の外周面に形成し、上述のように、ＪＩＳ規格に従い管継手連結部品７０の外径を１７ｍｍ、内径を１２．８ｍｍとし、リブ７４の突出高さＨ１を２．９ｍｍに設定すると、同様にリブ部分の肉厚が２．１ｍｍから３．９ｍｍへと厚肉化し、曲げ強度が約３倍になる。 Further, in the state where the pipe joints 12 are connected to each other using the pipe joint connecting part 70, when bending stress about the pipe joint 12 is applied to the connection pipe body 72, the bending stress is between the pipe joints 12 on both sides. It is easy to concentrate on the middle part. For this reason, the rib 74 is arrange | positioned in the part where the bending stress of the connection pipe body 72 tends to concentrate, and the bending strength is improved. Thereby, the deformation | transformation of the connection pipe body 72 by a bending stress can be suppressed or prevented effectively. Here, the improvement margin of the bending strength by the rib 74 of the pipe joint connecting component 70 will be described using an example. For example, when the pipe joint connecting part 70 is made to correspond to the nominal diameter 13 of the polybutene pipe, the outer diameter of the pipe joint connecting part 70 is 17 mm and the inner diameter is 12.8 mm in accordance with JIS standards (JIS K6792 and JIS K6778). At this time, if the protrusion height H1 of the rib 74 is set to 2.9 mm, the thickness of the rib portion increases from 2.1 mm to 3.9 mm, so that the bending strength of the pipe joint connecting component 70 is about 40. %improves. As another example, the rib 74 is formed on the outer peripheral surface of the pipe joint connecting part 70. As described above, the outer diameter of the pipe joint connecting part 70 is 17 mm and the inner diameter is 12.8 mm in accordance with JIS standards. When the protrusion height H1 is set to 2.9 mm, the thickness of the rib portion is increased from 2.1 mm to 3.9 mm, and the bending strength is approximately tripled.

ところで、一般的な管継手の種類として、管継手１２のような挿入された樹脂管Ｐの内周面にＯリング２２を密着させて樹脂管Ｐと管継手１２との間をシールする内面シールタイプの管継手や、挿入された樹脂管Ｐの外周面にＯリング（止水部材）を密着させて樹脂管Ｐと管継手との間をシールする外面シールタイプの管継手がある。一方、連結管体７２を射出成形で生産すると、連結管体７２の外周面に金型のパーティングラインによる樹脂のはみ出し余分部分（所謂、バリ）が形成される。ここで、バリが形成された連結管体７２を外面シールタイプの管継手に連結するとＯリングと外周面７７との密着をバリが阻害して十分なシール性を確保できない虞がある。このため、連結管体７２の外周面７７にバリが形成される場合には、外周面７７に検査溝８０を形成することで、誤って外面シールタイプの管継手に連結した場合に、外面シールタイプの管継手のＯリングでは検査溝８０を十分にシールすることができないため、後工程の漏水検査で流体が検査溝８０から漏れ出す。これにより、連結管体７２を誤って外面シールタイプの管継手に連結しているか、いないかを容易に判断することができる。 By the way, as a general type of pipe joint, an inner surface seal that seals between the resin pipe P and the pipe joint 12 by bringing the O-ring 22 into close contact with the inner peripheral surface of the inserted resin pipe P such as the pipe joint 12. There are types of pipe joints and outer surface seal type pipe joints in which an O-ring (water stop member) is brought into close contact with the outer peripheral surface of the inserted resin pipe P to seal between the resin pipe P and the pipe joint. On the other hand, when the connecting pipe body 72 is produced by injection molding, an excess portion (so-called burr) of the resin protruding from the mold parting line is formed on the outer peripheral surface of the connecting pipe body 72. Here, if the connecting pipe body 72 in which the burrs are formed is connected to an outer seal type pipe joint, the burrs may inhibit the close contact between the O-ring and the outer peripheral surface 77, and a sufficient sealing performance may not be ensured. For this reason, when burrs are formed on the outer peripheral surface 77 of the connecting pipe body 72, an inspection groove 80 is formed on the outer peripheral surface 77, so that when the connecting pipe body 72 is mistakenly connected to an outer seal type pipe joint, the outer surface seal Since the O-ring of the type of pipe joint cannot sufficiently seal the inspection groove 80, the fluid leaks from the inspection groove 80 in the water leakage inspection in the subsequent process. Thereby, it can be easily determined whether or not the connecting pipe body 72 is erroneously connected to the outer seal type pipe joint.

また、連結管体７２は、射出成形、切削加工等の工業的生産過程において生産される樹脂成形品のため、施工現場で樹脂管を切断して連結部品を製造するよりも、連結部品の外面に傷が付いたり、切断面が潰れたり、切断面周囲に切屑が残ったり、長さが短すぎたりなどの品質不良がない、すなわち高い品質を得ることができる。また、連結管体７２は、予め工業的生産過程において生産されることから、施工現場での樹脂管切断作業が不要となるため、切断作業が必要な場合と対比して、施工の煩雑さを解消することができ、さらに、施工時間も短縮することができる。 In addition, since the connecting pipe body 72 is a resin molded product produced in an industrial production process such as injection molding and cutting, the outer surface of the connecting part is produced rather than cutting the resin pipe at the construction site to manufacture the connecting part. There is no quality defect such as scratches on the surface, the cut surface is crushed, chips remain around the cut surface, or the length is too short, that is, high quality can be obtained. Further, since the connecting pipe body 72 is produced in advance in an industrial production process, the resin pipe cutting work at the construction site becomes unnecessary, so that the construction work is complicated compared to the case where the cutting work is necessary. It can be eliminated, and the construction time can be shortened.

また、施工現場で樹脂管を切断した場合に樹脂管の切断面が樹脂管の軸方向と直交する方向に対して傾斜すると、管継手に挿入した際に、切断面の傾斜部分の先端が先にＯリングに圧力を作用させるため、Ｏリングが径方向にズレ、そのまま樹脂管を挿入するとＯリングが脱落することがある。この状態で漏水検査を実施すると流体が漏れ出すため、施工をやり直す必要がある。しかし、連結管体７２の端部（端面）７６は、中心軸Ｋ２方向と直角となるように形成されているため、挿入時に管継手１２のＯリング２２の脱落を防止することができる。結果、漏水検査で流体が漏れ出さないため、施工をやり直す必要もない。 In addition, when the resin tube is cut at the construction site, if the cut surface of the resin tube is inclined with respect to the direction perpendicular to the axial direction of the resin tube, the tip of the inclined portion of the cut surface is first inserted when inserted into the pipe joint. In order to apply pressure to the O-ring, the O-ring may be displaced in the radial direction, and the O-ring may fall off if the resin tube is inserted as it is. If a water leak test is performed in this state, the fluid leaks out, so the construction needs to be repeated. However, since the end portion (end surface) 76 of the connecting pipe body 72 is formed so as to be perpendicular to the direction of the central axis K2, it is possible to prevent the O-ring 22 of the pipe joint 12 from dropping off during insertion. As a result, since the fluid does not leak in the water leak test, there is no need to redo the construction.

また、本実施形態の管継手１２から連結管体７２を引き抜く際には、図示しない解放冶具を用いて、係合解除部材２０を突起部２８側に押し込むことで、爪部５３の先端部が引掛溝７８から抜け出る。この状態で連結管体７２を抜き出し方向に引っ張ることで、管継手連結部品７０と管継手１２との連結を解除することができる。ここで、管継手連結部品７０を用いて管継手１２同士を連結した状態でのスリーブ１６の先端部同士の距離は、前述した解放冶具を配置できる程度に設定する必要がある。なお、このスリーブ１６の先端部同士の距離はリブ７４の幅によって決定されるため、リブ７４の幅は、解放冶具を配置することを考慮して設定することがより好ましい。 Further, when the connecting pipe body 72 is pulled out from the pipe joint 12 of the present embodiment, the disengagement member 20 is pushed into the protruding portion 28 side by using a release jig (not shown) so that the tip of the claw portion 53 is moved. Get out of the catch groove 78. In this state, the connection between the pipe joint connecting component 70 and the pipe joint 12 can be released by pulling the connection pipe body 72 in the pulling direction. Here, it is necessary to set the distance between the tips of the sleeves 16 in a state where the pipe joints 12 are connected to each other using the pipe joint connecting component 70 to such an extent that the above-described release jig can be disposed. Since the distance between the tip portions of the sleeve 16 is determined by the width of the rib 74, the width of the rib 74 is more preferably set in consideration of disposing a release jig.

またさらに、連結管体７２の軸方向の長さ（中心軸Ｋ２方向の距離）を、長さＬ１の２倍の長さと、１２ｍｍ以下の長さとを足した長さに設定することで、管継手１２同士の連結間隔を短くすることができる。特に、管継手連結部品７０の長さを必要最低限の長さ（シール性が確保される範囲の最低限の長さ）に設定すれば、管継手１２同士を最短で接続することも可能となる。このように設定した管継手連結部品７０を用いることで、狭いスペースにも配管構造体１０を設置することも可能となる。なお、本実施形態の配管構造体１０は、図５に示されるように、両管継手１２の管継手連結部品７０の連結側と反対側の挿入部３８に樹脂管Ｐを挿入して、配管構造体１０を介して樹脂管Ｐ同士を連結する用途に用いるものである。 Furthermore, by setting the axial length (distance in the central axis K2 direction) of the connecting tubular body 72 to a length obtained by adding twice the length L1 and a length of 12 mm or less. The connection interval between the joints 12 can be shortened. In particular, if the length of the pipe joint connecting component 70 is set to a necessary minimum length (minimum length within a range in which the sealing property is ensured), the pipe joints 12 can be connected to each other in the shortest time. Become. By using the pipe joint connecting part 70 set as described above, the piping structure 10 can be installed in a narrow space. In addition, as shown in FIG. 5, the piping structure 10 of the present embodiment includes a resin pipe P inserted into the insertion portion 38 on the side opposite to the connection side of the pipe joint connection component 70 of the both pipe joints 12. This is used for connecting the resin pipes P through the structure 10.

（第２の実施形態）
次に、本発明の管継手連結部品及び配管構造体の第２の実施形態を図７に基づいて説明する。なお、第１の実施形態と同一部材については、同一符号を付して説明を省略する。 (Second Embodiment)
Next, 2nd Embodiment of the pipe joint connection component and piping structure of this invention is described based on FIG. In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

図７には、第２の実施形態の管継手連結部品１００の中心軸方向に沿った部分断面図が示されている。この管継手連結部品１００は、一端部（図７では左側の端部）が前述した管継手１２を連結できる構成とされ、他端部が管継手１２よりもサイズの大きい管継手１２Ｌを連結できる構成とされている。また、図１中の矢印Ｂは管継手連結部品１００の中心軸Ｋ３方向と平行で且つ管継手連結部品１００の中心側に向かう方向を示し、矢印Ｆは管継手連結部品１００の中心軸Ｋ３方向と平行で且つ管継手連結部品１００の中心側から離れる方向（矢印Ｂの反対方向）を示している。なお、管継手１２と管継手１２Ｌとは、構成要素が同じでサイズのみが異なる（本実施形態では管継手１２よりも管継手１２Ｌのサイズが大きい）ため、図７中では管継手１２と区別するため、符号の末尾にＬを付加するものとする。なお、連結管体１０２の一端部側は、第１の実施形態の連結管体７２の一端部側と同一の構成なのでその説明を省略する。なお、本実施形態の配管構造体９９は、管継手連結部品１００と、この管継手連結部品７０によって連結される管継手１２、及び管継手１２Ｌによって構成される。 FIG. 7 shows a partial cross-sectional view along the central axis direction of the pipe joint connecting component 100 of the second embodiment. This pipe joint connecting component 100 is configured such that one end portion (the left end portion in FIG. 7) can connect the above-described pipe joint 12, and the other end portion can connect a pipe joint 12 L larger in size than the pipe joint 12. It is configured. Further, an arrow B in FIG. 1 indicates a direction parallel to the direction of the central axis K3 of the pipe joint connecting component 100 and toward the center side of the pipe joint connecting component 100, and an arrow F is a direction of the central axis K3 of the pipe joint connecting component 100. And a direction away from the center side of the pipe joint connecting component 100 (a direction opposite to the arrow B). Note that the pipe joint 12 and the pipe joint 12L have the same components and differ only in size (in this embodiment, the size of the pipe joint 12L is larger than that of the pipe joint 12). Therefore, L is added to the end of the code. In addition, since the one end part side of the connection pipe body 102 is the same structure as the one end part side of the connection pipe body 72 of 1st Embodiment, the description is abbreviate | omitted. In addition, the piping structure 99 of this embodiment is comprised by the pipe joint connection component 100, the pipe joint 12 connected by this pipe joint connection component 70, and the pipe joint 12L.

管継手連結部品１００は、射出成形、切削加工等の工業的生産過程において生産された略筒状の樹脂成形品である連結管体１０２を備えている。この連結管体１０２の中心軸方向（中心軸Ｋ３方向）の他端部側の径は、樹脂管Ｐの径よりも大きい管体の径に設定されている。また、連結管体１０２の他端部（端面）１０６は、夫々連結管体１０２の中心軸Ｋ３に対して直角となるように形成されている。さらに、連結管体１０２の内周面１０３の中心軸Ｋ３方向の中央部分には、連結管体１０２の周方向に沿って延びる環状のリブ１０４が形成されている。このリブ１０４の突出高さＨ２は、管継手１２Ｌの挿入部３８Ｌに連結管体１０２の他端部１０６を挿入した際に、コア部２６Ｌの先端部２７Ｌがリブ１０４の中心軸方向の壁面１０５に突き当たる程度の高さに設定することが好ましい。ただし、突出高さＨ２が高すぎると、管継手１２，１２Ｌを連結して流体を流した際に、このリブ１０４付近で乱流が生じ騒音原因となる。また、乱流が生じることで損失水頭が大きくなるため、リブ１０４の突出高さＨ２は、壁面１０５と先端部２７Ｌとが接触する範囲で、且つ騒音及び損失水頭が最も小さくなる高さに設定することが好ましい。また、本実施形態ではリブ１０４に壁面１０５から矢印Ｂ方向側で且つ中心軸Ｋ３側に向かって傾斜する傾斜面１１６を形成している。この傾斜面１１６によって、連結管体１０２の他端部１０６を管継手１２Ｌの挿入部３８Ｌに挿入した際のリブ１０４と先端部２７Ｌとの段差が滑らかになるため、流体を流した際の損失水頭を小さくすることができる。 The pipe joint connecting component 100 includes a connecting pipe body 102 which is a substantially cylindrical resin molded product produced in an industrial production process such as injection molding or cutting. The diameter of the connecting tube 102 on the other end side in the central axis direction (the direction of the central axis K3) is set to be larger than the diameter of the resin tube P. Further, the other end portions (end surfaces) 106 of the connecting tube bodies 102 are formed so as to be perpendicular to the central axis K3 of the connecting tube bodies 102, respectively. Further, an annular rib 104 extending along the circumferential direction of the connection tube body 102 is formed at a central portion of the inner peripheral surface 103 of the connection tube body 102 in the direction of the central axis K3. The protrusion height H2 of the rib 104 is such that when the other end portion 106 of the connecting tube body 102 is inserted into the insertion portion 38L of the pipe joint 12L, the tip end portion 27L of the core portion 26L is the wall surface 105 in the central axis direction of the rib 104. It is preferable to set the height so as to hit the surface. However, if the protrusion height H2 is too high, turbulent flow is generated near the rib 104 and causes noise when the pipe joints 12 and 12L are connected to flow fluid. Further, since the loss head is increased due to the occurrence of turbulent flow, the protrusion height H2 of the rib 104 is set in a range where the wall surface 105 and the tip portion 27L are in contact with each other and the noise and loss head are minimized. It is preferable to do. In the present embodiment, the rib 104 is formed with an inclined surface 116 that is inclined from the wall surface 105 toward the arrow B direction and toward the central axis K3. The inclined surface 116 smoothens the step between the rib 104 and the distal end portion 27L when the other end portion 106 of the connecting pipe body 102 is inserted into the insertion portion 38L of the pipe joint 12L. The water head can be reduced.

また、連結管体１０２の他端部１０６とリブ１０４の壁面１０５との中心軸Ｋ２方向に沿った長さＬ３は、管継手１２Ｌの突起部２８Ｌの中心軸Ｋ１方向の壁面４１Ｌとコア部２６Ｌの先端部２７Ｌとの中心軸Ｋ１方向に沿った長さＬ４と同じ長さに設定することが好ましいが、長さＬ３よりも長さＬ４が若干短くてもよいものとする。ただし、連結管体１０２の他端部１０６を管継手１２Ｌの挿入部３８Ｌに挿入し、コア部２６Ｌの先端部２７Ｌがリブ１０４の壁面１０５に突き当たった際に、他端部１０６が管継手１２ＬのＯリング２２Ｌよりも突起部２８Ｌの壁面４１Ｌ側に位置するように長さＬ３は設定する必要がある。 The length L3 along the direction of the central axis K2 between the other end portion 106 of the connecting tube 102 and the wall surface 105 of the rib 104 is such that the wall surface 41L and the core portion 26L in the direction of the central axis K1 of the projection 28L of the pipe joint 12L. The length L4 is preferably set to the same length as the length L4 along the direction of the central axis K1 with the distal end portion 27L, but the length L4 may be slightly shorter than the length L3. However, when the other end portion 106 of the connecting pipe body 102 is inserted into the insertion portion 38L of the pipe joint 12L and the leading end portion 27L of the core portion 26L hits the wall surface 105 of the rib 104, the other end portion 106 becomes the pipe joint 12L. It is necessary to set the length L3 so as to be positioned closer to the wall surface 41L of the protrusion 28L than the O-ring 22L.

図７に示されるように、連結管体１０２の外周面１０７の他端部１０６側には、連結管体１０２の周方向に沿って延びる環状の引掛溝１０８が形成されている。この引掛溝１０８には、図９に示されるように、連結管体１０２を管継手１２Ｌの挿入部３８Ｌに挿入した際にロックリング５２Ｌの爪部５３Ｌの先端部が入り込む。このため、連結管体１０２に抜け出し方向の力が作用した際には、爪部５３Ｌの先端部が引掛溝１０８の矢印Ｆ方向側の溝壁に引っ掛かり、連結管体１０２の抜け出しが阻止される。 As shown in FIG. 7, an annular hooking groove 108 extending along the circumferential direction of the connection tube body 102 is formed on the other end 106 side of the outer peripheral surface 107 of the connection tube body 102. As shown in FIG. 9, when the connecting tube 102 is inserted into the insertion portion 38L of the pipe joint 12L, the tip of the claw portion 53L of the lock ring 52L enters the hooking groove 108. For this reason, when a force in the withdrawal direction is applied to the connecting tube body 102, the tip of the claw portion 53L is caught by the groove wall on the arrow F direction side of the hooking groove 108, and the connecting tube body 102 is prevented from coming out. .

図８に示されるように、連結管体１０２の外周面１０７には、後述する梨地部１１２から中心軸Ｋ２方向の他端側に中心軸Ｋ３方向に沿って延びる検査溝１１０が形成されている。また、連結管体１０２の外周面１０７の中心軸Ｋ３方向の中央部分には、連結管体１０２の周方向に沿って滑り止めと、連結管体１０２の差し込み確認の目印を兼ねた梨地部１１２が形成されている。 As shown in FIG. 8, an inspection groove 110 extending along the central axis K3 direction is formed on the outer peripheral surface 107 of the connecting tube body 102 from a satin portion 112 described later on the other end side in the central axis K2 direction. . Further, a matte portion 112 serving as a slip stopper along the circumferential direction of the connecting tube 102 and a mark for confirming insertion of the connecting tube 102 is provided at the central portion of the outer peripheral surface 107 of the connecting tube 102 in the direction of the central axis K3. Is formed.

次に第２の実施形態の作用について説明する。
管継手連結部品１００では、連結管体１０２の一端部に管継手１２を、他端部に管継手１２Ｌを接続して管継手１２と管継手１２Ｌとを連結することができる。また、本実施形態の配管構造体９９は、図８に示されるように、管継手１２及び管継手１２Ｌの管継手連結部品１００の連結側と反対側の挿入部３８に樹脂管Ｐ及び樹脂管Ｐ’を挿入することで、配管構造体９９を介して異径サイズの樹脂管Ｐ及び樹脂管Ｐ’を連結することができる。すなわち、配管接続部が全て同径の同径管継手（例えば管継手１２及び管継手１２Ｌなど）のみの持ち合わせでも、異径サイズの樹脂管同士を連結することができる。従って、管継手の品揃え（サイズ）を減らすことができ、コストダウンが可能となる。なお、管継手１２Ｌは樹脂管Ｐ’用の管継手である。 Next, the operation of the second embodiment will be described.
In the pipe joint connecting component 100, the pipe joint 12 and the pipe joint 12 L can be connected by connecting the pipe joint 12 to one end of the connection pipe body 102 and the pipe joint 12 L to the other end. Further, as shown in FIG. 8, the piping structure 99 of the present embodiment includes a resin pipe P and a resin pipe in the insertion portion 38 opposite to the connection side of the pipe joint connecting component 100 of the pipe joint 12 and the pipe joint 12L. By inserting P ′, the resin pipe P and the resin pipe P ′ having different diameters can be connected via the piping structure 99. That is, resin pipes of different diameters can be connected to each other even if the pipe connection portions are only the same diameter pipe joints having the same diameter (for example, the pipe joint 12 and the pipe joint 12L). Therefore, the assortment (size) of pipe joints can be reduced, and the cost can be reduced. The pipe joint 12L is a pipe joint for the resin pipe P ′.

また、本実施形態でも第１の実施形態と同様に、連結管体１０２の軸方向の長さ（中心軸Ｋ３方向の距離）を、長さＬ３の２倍の長さと、１２ｍｍ以下の長さとを足した長さに設定することで、管継手１２及び管継手１２Ｌの連結間隔を短くすることができる。 Also in the present embodiment, as in the first embodiment, the length of the connecting tube 102 in the axial direction (the distance in the direction of the central axis K3) is twice the length L3 and a length of 12 mm or less. By setting to a length obtained by adding, the connection interval between the pipe joint 12 and the pipe joint 12L can be shortened.

（その他の実施形態）
前述の実施形態では、連結管体全体を樹脂製（樹脂成形品）とする構成としているが、本発明はこの構成に限定される必要はなく、連結管体の少なくとも一部が樹脂で構成されればよく、例えば、内周側を樹脂、外周側を金属とする多層構造の連結管体などであってもよいものとする。この場合には、外周側が金属のため、例えば、一般的な材料の一つである砲金（青銅）において必要なＮＰｂ処理を施す必要がなく、さらに、曲げ強度を向上することができる。なお、ＮＰｂ処理とは、鉛合金表面の鉛化合物（酸化物、水酸化物）を、溶液（例えば、特殊アルカリエッチング溶液等）に浸漬させることで溶解除去させて、表面の鉛を除去する処理のことである。 (Other embodiments)
In the above-described embodiment, the entire connecting tube is made of resin (resin molded product). However, the present invention is not limited to this structure, and at least a part of the connecting tube is made of resin. For example, it may be a connecting pipe having a multilayer structure in which the inner peripheral side is resin and the outer peripheral side is metal. In this case, since the outer peripheral side is a metal, for example, it is not necessary to perform NPb treatment required for gun metal (bronze) which is one of general materials, and the bending strength can be further improved. The NPb treatment is a treatment that removes lead from the surface by immersing a lead compound (oxide, hydroxide) on the surface of the lead alloy in a solution (for example, a special alkali etching solution or the like) to remove the lead on the surface. That is.

前述の実施形態では、管継手１２を内面シールタイプの管継手としたが、本発明はこの構成に限定される必要はなく、管継手１２は外面シールタイプの管継手としてもよいものとする。この場合には、管継手連結部品の滑り止め部を、外面シールタイプの止水部材（例えばＯリングなど）と接触しない位置に形成することが好ましい。また、管継手連結部品の連結対象が外面シールタイプの止水部材の場合には、連結管体の外周面にリブを形成してもよい。また、このリブを管継手連結部品の挿入作業、及び引抜作業時の滑り止めとして用いてもよいものとする。さらに、外面シールタイプの管継手を連結対象とした管継手連結部品の場合には、連結管体の内周面に検査溝を形成することで、誤って内面シールタイプの管継手に連結しても、漏水検査で連結対象が誤っていることを容易に発見することができる。 In the above-described embodiment, the pipe joint 12 is an inner surface seal type pipe joint, but the present invention is not limited to this configuration, and the pipe joint 12 may be an outer surface seal type pipe joint. In this case, it is preferable that the anti-slip portion of the pipe joint connecting component is formed at a position where it does not come into contact with an outer seal type water-stopping member (for example, an O-ring). Moreover, when the connection object of a pipe joint connection component is an outer surface seal type water stop member, you may form a rib in the outer peripheral surface of a connection pipe body. Further, this rib may be used as a slip stopper at the time of inserting and extracting the pipe joint connecting part. In addition, in the case of a pipe joint connection part that is to be connected to an outer seal type pipe joint, an inspection groove is formed on the inner peripheral surface of the connection pipe body, so that it is accidentally connected to the inner seal type pipe joint. In addition, it is possible to easily find out that the connection target is incorrect in the water leakage test.

また、前述の実施形態では、引掛溝を周方向に沿って延びる環状の溝としているが、本発明はこの構成に限定される必要はなく、爪部を引掛けることができればどのような形状でもよいものとする。ここで、管継手連結部品７０を用いて一例を説明すると、引掛溝７８は、図１０に示されるように周方向に分割された環状の溝によって構成されてもよいものとする。 In the above-described embodiment, the hooking groove is an annular groove extending in the circumferential direction. However, the present invention is not limited to this configuration, and any shape can be used as long as the claw portion can be hooked. Be good. Here, if an example is demonstrated using the pipe joint connection component 70, the hooking groove 78 shall be comprised by the cyclic | annular groove | channel divided | segmented into the circumferential direction as FIG. 10 shows.

さらに、前述の実施形態では、連結管体の外周面に、複数の凹及び複数の凸の少なくとも一方からなる滑り止め部の一例として梨地部を形成したが、本発明はこの構成に限定される必要はなく、複数の凹凸が不均一に形成されてもよく、溝状の凹が複数形成されてもよく、リブ状の凸が複数形成されてもよいものとする。ここで、管継手連結部品７０を用いて一例を説明すると、滑り止め部は、図１１に示されるように文字状の凸又は凹であってもよいものとする。なお、文字としては、ブランド名、サイズなど何れでもよい。 Furthermore, in the above-described embodiment, the matte portion is formed on the outer peripheral surface of the connecting pipe body as an example of the anti-slip portion including at least one of the plurality of recesses and the plurality of projections, but the present invention is limited to this configuration. It is not necessary, and a plurality of irregularities may be formed unevenly, a plurality of groove-like recesses may be formed, and a plurality of rib-like projections may be formed. Here, if an example is demonstrated using the pipe joint connection component 70, as shown in FIG. 11, a letter-like convex or concave may be sufficient as a non-slip | skid part. In addition, as a character, any, such as a brand name and a size, may be sufficient.

またさらに、前述の実施形態の配管構造体は管継手連結部品と、両側の管継手とによって構成されたが、本発明はこの構成に限定される必要はなく、配管構造体は複数の管継手連結部品を用いて複数の管継手を連結してもよいものとする。また、前述の実施形態では管継手を直線状、且つ配管接続部を２つ有する構成としたが、本発明はこの構成に限定される必要はなく、管継手はＬ字状であってもよく、また、配管接続部を３つ有するＴ字状、Ｙ字状であってもよく、さらに、配管接続部を４つ有する十字状、またさらに、５つ以上の配管接続部を有する形状であってもよいものとする。なお、後述する図１２及び図１３中では、Ｌ字状管継手（所謂エルボー）を符号１２Ｅ、図１３中ではＴ字状管継手（所謂チーズ）を符号１２Ｔで示すものとする。ここで、管継手連結部品７０を用いてその他の実施形態の配管構造体の一例を説明すると、図１２に示されるように、建築躯体２００の狭いスペース２０２で配管を折り返す必要がある場合には、スペース２０２に配管構造体１０Ｅを配置できる必要最低限の長さに管継手連結部品７０の長さを調整し、一方の配管接続部が樹脂管Ｐに接続されたＬ字状管継手１２Ｅ同士を連結することで、狭いスペース２０２でも配管を折り返すことができる。また、管継手連結部品７０を用いてその他の実施形態の配管構造体のその他の例を説明すると、図１３に示されるように、管継手連結部品７０を用いて複数のＴ字状の管継手１２同士を連結して配管構造体１０Ｈを構成し、Ｔ字状管継手１２Ｔの管継手連結部品７０を接続していない配管接続部に、樹脂管Ｐの一端部を接続し、樹脂管Ｐの他端部を給水給湯用器具（図示省略）に接続することで、配管構造体１０Ｈによる集中配管が可能となる。これにより、配管構造体１０Ｈから給水給湯用器具までの配管途中に配管の接続部分が設けられないため接続部分に漏水対策を施す必要がなく、配管構造体１０を目視確認が容易な場所に設置することでメンテナンスや点検が容易になり、さらに、給水給湯用器具を同時に使用しても圧力変化が少なく、安定した流量を供給することができる。 Furthermore, although the piping structure of the above-described embodiment is configured by the pipe joint connecting component and the pipe joints on both sides, the present invention is not limited to this configuration, and the piping structure includes a plurality of pipe joints. A plurality of pipe joints may be connected using connecting parts. In the above-described embodiment, the pipe joint has a linear shape and two pipe connection portions. However, the present invention is not limited to this configuration, and the pipe joint may be L-shaped. Further, it may be T-shaped or Y-shaped having three pipe connecting portions, and is a cross shape having four pipe connecting portions, or a shape having five or more pipe connecting portions. It may be. 12 and 13, which will be described later, an L-shaped pipe joint (so-called elbow) is denoted by reference numeral 12E, and in FIG. 13, a T-shaped pipe joint (so-called cheese) is denoted by reference numeral 12T. Here, when an example of the piping structure of another embodiment is described using the pipe joint connecting component 70, as shown in FIG. 12, when the piping needs to be folded back in the narrow space 202 of the building housing 200. The length of the pipe joint connecting part 70 is adjusted to the minimum necessary length that can arrange the pipe structure 10E in the space 202, and the L-shaped pipe joints 12E in which one pipe connection portion is connected to the resin pipe P By connecting the pipes, the pipe can be folded back even in a narrow space 202. Further, another example of the piping structure according to another embodiment will be described using the pipe joint connecting part 70. As shown in FIG. 13, a plurality of T-shaped pipe joints using the pipe joint connecting part 70 are used. 12 are connected to each other to form a pipe structure 10H, and one end of the resin pipe P is connected to a pipe connection part to which the pipe joint connecting part 70 of the T-shaped pipe joint 12T is not connected. By connecting the other end to a water / hot water supply device (not shown), centralized piping by the piping structure 10H becomes possible. As a result, there is no pipe connection part in the middle of the pipe from the pipe structure 10H to the water supply / hot water supply equipment, so there is no need to take measures against water leakage at the connection part, and the pipe structure 10 is installed in a place where visual confirmation is easy. As a result, maintenance and inspection are facilitated, and even when the water and water heaters are used at the same time, there is little pressure change and a stable flow rate can be supplied.

以上、実施形態を挙げて本発明の実施の形態を説明したが、これらの実施形態は一例であり、要旨を逸脱しない範囲内で種々変更して実施できる。また、本発明の権利範囲がこれらの実施形態に限定されないことは言うまでもない。例えば、本発明の管継手連結部品は、前述の実施形態の管継手と異なる構造のメカニカル継手、及び熱融着継手（継手と管体との接続部を熱融着する継手）に対しても、要旨を逸脱しない範囲内で種々変更して適用させることができ、本発明の作用効果を得ることができる。 The embodiments of the present invention have been described above with reference to the embodiments. However, these embodiments are merely examples, and various modifications can be made without departing from the scope of the invention. It goes without saying that the scope of rights of the present invention is not limited to these embodiments. For example, the pipe joint connecting component of the present invention can be applied to a mechanical joint having a structure different from that of the pipe joint of the above-described embodiment, and a heat-sealing joint (a joint for heat-sealing a connection portion between the joint and the pipe body). Various modifications can be applied without departing from the spirit of the invention, and the effects of the present invention can be obtained.

本発明の第１の実施形態の管継手連結部品の中心軸方向に沿った部分断面図である。It is a fragmentary sectional view in alignment with the central-axis direction of the pipe joint connection component of the 1st Embodiment of this invention. 図１のＡ部拡大図である。It is the A section enlarged view of FIG. 本発明の第１の実施形態の管継手連結部品の斜視図である。It is a perspective view of the pipe joint connection component of the 1st Embodiment of this invention. 本発明の第１の実施形態の管継手連結部品と連結する管継手の中心軸方向に沿った部分断面図である。It is a fragmentary sectional view in alignment with the central-axis direction of the pipe joint connected with the pipe joint connection component of the 1st Embodiment of this invention. 本発明の第１の実施形態の管継手連結部品を用いて管継手同士を連結した状態を示す中心軸方向に沿った部分断面図である。It is a fragmentary sectional view along the central-axis direction which shows the state which connected the pipe joints using the pipe joint connection component of the 1st Embodiment of this invention. 第１の実施形態の管継手連結部品の引掛溝に管継手の爪部が引っ掛かった状態を示す拡大図である。It is an enlarged view which shows the state by which the nail | claw part of the pipe joint was hooked in the hook groove of the pipe joint connection component of 1st Embodiment. 本発明の第２の実施形態の管継手連結部品の中心軸方向に沿った断面図である。It is sectional drawing along the center axis direction of the pipe joint connection component of the 2nd Embodiment of this invention. 本発明の第２の実施形態の管継手連結部品の斜視図である。It is a perspective view of the pipe joint connection component of the 2nd Embodiment of this invention. 本発明の第２の実施形態の管継手連結部品を用いて管継手同士を連結した状態を示す中心軸方向に沿った部分断面図である。It is a fragmentary sectional view along the central-axis direction which shows the state which connected the pipe joints using the pipe joint connection component of the 2nd Embodiment of this invention. 本発明のその他の実施形態の管継手連結部品の引掛溝の一例を示す管継手連結部品の斜視図である。It is a perspective view of the pipe joint connection component which shows an example of the catching groove of the pipe joint connection component of other embodiment of this invention. 本発明のその他の実施形態の管継手連結部品の滑り止め部の一例を示す管継手連結部品の側面図である。It is a side view of the pipe joint connection component which shows an example of the slip prevention part of the pipe joint connection component of other embodiment of this invention. 本発明のその他の実施形態の配管構造体の一例を示す説明図である。It is explanatory drawing which shows an example of the piping structure of other embodiment of this invention. 本発明のその他の実施形態の配管構造体のその他の例を示す説明図である。It is explanatory drawing which shows the other example of the piping structure of other embodiment of this invention.

符号の説明Explanation of symbols

１０配管構造体
１０Ｅ配管構造体
１０Ｔ配管構造体
１２管継手
１２ＥＬ字状管継手（管継手）
１２Ｌ管継手
１２ＴＴ字状管継手（管継手）
２２Ｏリング（止水部材）
２２ＬＯリング（止水部材）
３８挿入部
５３爪部
５３Ｌ爪部
７０管継手連結部品
７２連結管体
７３内周面
７４リブ
７５壁面
７６端部
７７外周面
７８引掛溝
８０検査溝
８２梨地部（滑り止め部）
９９配管構造体
１００管継手連結部品
１０２連結管体
１０３内周面
１０４リブ
１０５壁面
１０６他端部（端部）
１０７外周面
１０８引掛溝
１１０検査溝
１１２梨地部（滑り止め部）
Ｋ１中心軸
Ｋ２中心軸
Ｋ３中心軸
Ｐ樹脂管（管体）
Ｐ’ 樹脂管（管体） DESCRIPTION OF SYMBOLS 10 Piping structure 10E Piping structure 10T Piping structure 12 Pipe joint 12E L-shaped pipe joint (pipe joint)
12L pipe joint 12T T-shaped pipe joint (pipe joint)
22 O-ring (water-stop member)
22L O-ring (water-stop member)
38 Insertion part 53 Claw part 53L Claw part 70 Pipe joint connection part 72 Connection pipe body 73 Inner peripheral surface 74 Rib 75 Wall surface 76 End part 77 Outer peripheral surface 78 Hatch groove 80 Inspection groove 82 Pear surface part (Anti-slip part)
99 Piping structure 100 Fitting joint component 102 Connecting pipe body 103 Inner peripheral surface 104 Rib 105 Wall surface 106 Other end (end)
107 outer peripheral surface 108 hooking groove 110 inspection groove 112 pear area (slip prevention part)
K1 central axis K2 central axis K3 central axis P Resin pipe (pipe)
P 'resin tube (pipe)

Claims

管体を接続するための管体接続部を有する管継手同士を連結する管継手連結部品であって、
両端部分が前記管体接続部に接続可能な少なくとも一部が樹脂製の連結管体と、
前記連結管体の内周面に一体的に形成され、前記連結管体の周方向に沿って延びるリブと、を備え、
前記管体接続部は、前記管体を挿入するための挿入部と、前記挿入部に挿入した前記管体の内周面に密着して前記管体と前記管体接続部との間をシールする環状の止水部材とを有し、
前記連結管体の両端部分の外周面には、軸方向に延びる検査溝が形成されている、ことを特徴とする管継手連結部品。 A pipe joint connecting part for connecting pipe joints having a pipe connecting part for connecting pipes,
At least a portion of which both end portions can be connected to the tube connecting portion is a connecting tube made of resin,
A rib formed integrally with the inner peripheral surface of the connection pipe body and extending along the circumferential direction of the connection pipe body ,
The tubular body connecting portion seals between the tubular body and the tubular body connecting portion in close contact with an insertion portion for inserting the tubular body and an inner peripheral surface of the tubular body inserted into the inserting portion. An annular water stop member
An inspection groove extending in the axial direction is formed on the outer peripheral surface of both end portions of the connection pipe body, and the pipe joint connection part.

管体を接続するための管体接続部を有する管継手同士を連結する管継手連結部品であって、A pipe joint connecting part for connecting pipe joints having a pipe connecting part for connecting pipes,
両端部分が前記管体接続部に接続可能な少なくとも一部が樹脂製の連結管体と、  At least a portion of which both end portions can be connected to the tube connecting portion is a connecting tube made of resin,
前記連結管体の内周面に一体的に形成され、前記連結管体の周方向に沿って延びるリブと、を備え、  A rib formed integrally with the inner peripheral surface of the connection pipe body and extending along the circumferential direction of the connection pipe body,
前記管体接続部は、前記管体を挿入するための挿入部と、前記挿入部に挿入した前記管体の外周面に密着して前記管体と前記管体接続部との間をシールする環状の止水部材とを有し、  The tubular body connecting portion seals between the tubular body and the tubular body connecting portion in close contact with an insertion portion for inserting the tubular body and an outer peripheral surface of the tubular body inserted into the inserting portion. An annular water stop member,
前記連結管体の両端部分の内周面には、軸方向に延びる検査溝が形成されている、ことを特徴とする管継手連結部品。  An inspection groove extending in the axial direction is formed on the inner peripheral surface of both end portions of the connection pipe body.

前記連結管体の両端部に前記管継手を接続した状態で、両側の前記管継手間の中間部分に前記リブが配置されることを特徴とする請求項１または請求項２に記載の管継手連結部品。 3. The pipe joint according to claim 1 , wherein the rib is disposed at an intermediate portion between the pipe joints on both sides in a state where the pipe joint is connected to both ends of the connecting pipe body. Connecting parts.

前記連結管体の軸方向の長さは、前記管継手と前記連結管体とが嵌合する長さの２倍の長さと、１２ｍｍ以下の長さと、を足したものであることを特徴とする請求項１〜請求項３の何れか１項に記載の管継手連結部品。 The length in the axial direction of the connecting pipe body is obtained by adding a length twice as long as the pipe joint and the connecting pipe body are fitted to each other and a length of 12 mm or less. The pipe joint connecting component according to any one of claims 1 to 3 .

前記リブの高さが０．５ｍｍ以上、且つ前記連結管体のリブ部分の内径寸法が前記管継手の最小内径寸法以上を満たすことを特徴とする請求項１〜請求項４の何れか１項に記載の管継手連結部品。 The height of the said rib is 0.5 mm or more, and the internal diameter dimension of the rib part of the said connection pipe body satisfy | fills more than the minimum internal diameter dimension of the said pipe joint, The any one of Claims 1-4 characterized by the above-mentioned. The fitting joint part described in 1.

前記管体接続部は、前記管体が前記挿入部に挿入されると弾性変形して前記管体の外周面を押圧し、挿入された前記管体に抜き出し方向の力が作用したときに先端部が前記管体の外周面に喰い込んで前記管体の抜き出しを阻止する弾性変形可能な爪部を備え、
前記連結管体の外周面に、前記連結管体を前記挿入部に挿入したときに、前記爪部を引掛け可能な引掛溝を形成することを特徴とする請求項１〜請求項５の何れか１項に記載の管継手連結部品。 The tubular body connecting portion is elastically deformed when the tubular body is inserted into the insertion portion, presses the outer peripheral surface of the tubular body, and a distal end when a force in the extraction direction acts on the inserted tubular body An elastically deformable claw portion that bites into the outer peripheral surface of the tubular body and prevents extraction of the tubular body;
The outer peripheral surface of the connecting tube, the connection tube body when inserted into the insertion portion, one of claims 1 to 5, characterized in that to form the hooking can hook groove the pawl portion pipe joint coupling component according to item 1 or.

前記連結管体の外周面に複数の凹及び複数の凸の少なくとも一方からなる滑り止め部を形成することを特徴とする請求項１〜請求項６に記載の管継手連結部品。 The pipe joint connection component according to claim 1, wherein an anti-slip portion comprising at least one of a plurality of recesses and a plurality of protrusions is formed on an outer peripheral surface of the connection tube body.

前記連結管体が工業的生産過程において生産されることを特徴とする請求項１〜請求項７の何れか１項に記載の管継手連結部品。 The pipe joint connection component according to any one of claims 1 to 7, wherein the connection pipe is produced in an industrial production process.

前記連結管体の一端部と他端部とが同径であることを特徴とする請求項１〜請求項８の何れか１項に記載の管継手連結部品。 The pipe joint connecting component according to any one of claims 1 to 8, wherein one end portion and the other end portion of the connecting pipe body have the same diameter.

前記連結管体の一端部と他端部とが異径であることを特徴とする請求項１〜請求項８の何れか１項に記載の管継手連結部品。 The pipe joint connecting component according to any one of claims 1 to 8, wherein the one end portion and the other end portion of the connecting pipe body have different diameters.

請求項１〜請求項１０の何れか１項に記載の管継手連結部品を用いて前記管継手同士を連結して構成されることを特徴とする配管構造体。 A pipe structure comprising the pipe joints connected to each other using the pipe joint connection part according to any one of claims 1 to 10 .