JP2004232746A

JP2004232746A - Pipe coupling

Info

Publication number: JP2004232746A
Application number: JP2003022465A
Authority: JP
Inventors: Kenji Mizukawa; 賢司水川; Tomohiro Nakamura; 知広中村
Original assignee: Sekisui Chemical Co Ltd
Current assignee: Sekisui Chemical Co Ltd
Priority date: 2003-01-30
Filing date: 2003-01-30
Publication date: 2004-08-19
Anticipated expiration: 2023-01-30
Also published as: JP4625237B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe coupling for performing the work connection while confirming that an end part of a synthetic resin pipe is inserted up to the proper innermost part in a socket with a sound as a standard by a sounding mechanism. <P>SOLUTION: This pipe coupling has a pipe coupling body 11, an outer cylinder part 12 continuously arranged in the pipe coupling body 11, a box nut 13 continuously arranged in a tip part of the outer cylinder part 12 and the socket surrounded by the outer cylinder part 12 and an inner cylinder part extending inside the box nut 13 from the pipe coupling body 11, and installs a slipping-out preventive ring 15 and a sealing rubber ring 16 in the socket, and can be connected in a slipping-out preventable state by the slipping-out preventive ring 15 in a single operation of only inserting an inserting port P1 of the connecting synthetic resin pipe P into the socket. The sounding mechanism capable of confirming insertion by generating a sound when the tip of the inserting port P1 of the synthetic resin pipe P comes into contact, is arranged in the innermost side part of an installing position of the slipping-out preventive ring 15 and the sealing rubber ring 16 in the socket. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、合成樹脂管の挿口を挿入するだけのワンタッチの操作で抜出し防止可能状態に接続できる受口を備えた管継手に関するものである。
【０００２】
【従来の技術】
従来、合成樹脂管の挿口を差し込むだけで、シール機能と抜け止め機能を有するように接続できる受口を備えた管継手として、例えば、図１７に示すように、テーパー内面を有する袋ナットａと、その内面に装着された係止用刃を有するロックリングｂ及びスペーサーリングｃと、袋ナットａに螺合可能なネジｄ１が設けられた継手本体ｄの一端に管挿入部ｅとを備え、管挿入部ｅはその外周に周方向に沿って止水リングｆが装着されているものが知られている（特許文献１参照）。
【０００３】
この管継手は、管挿入部ｅ内のロックリングｂと止水リングｆとの間に接続すべき管ｐの先端を適正な奥部まで挿入すると、管Ｐの内面に止水リングｆが管挿入部ｅの外周に装着された止水リングｆが圧接されてシールすることができ、その後、被接続管ｐを引き抜く方向に引っ張ると、ロックリングｂの端部が袋ナットａのテーパー内面に当たって縮径し、その係止用刃が管ｐの表面に食い込み、管ｐが管継手の管挿入部ｅから抜け出るのを防止することができるようになっている。
【０００４】
上記のような従来の管継手の場合には、管挿入部ｅ内に管ｐをシール機能と抜け止め機能を有するように接続するには、管挿入部ｅ内の適正な奥部まで管ｐの先端を挿入することが必須の条件となる。
この対策として、袋ナットに外部から管の挿入状態が確認できる挿入確認窓を設けたり、挿入される管の方に挿入標線を記入し、管を管挿入部の適正な奥部まで挿入するようにしている。
【０００５】
しかしながら、実際の施工現場で、暗い場所や周囲に障害物があって見え難い場所等では、施工者が管継手の外側からその条件を満たしていることを正確に確認しつつ接続作業を行うことが難しい場合がある。
そのような場合、施工者は管ｐを管挿入部ｅ内の適正な奥部まで差し込んでいるつもりでも、十分に挿入されていないケースが発生し、漏水につながる施工不良の原因となり易いという問題点がある。
【０００６】
【特許文献１】
特開２００１−１９３８８３（特許請求の範囲等参照）
【０００７】
【発明が解決しようとする課題】
本発明は、上記のような従来の問題点を解消し、受口内の適正な奥部まで合成樹脂管の端部が差し込まれたことを発音機構により音を目安にして確認しながら接続を行うことができる管継手を提供することを目的としてなされたものである。
【０００８】
【課題を解決するための手段】
本願の請求項１に記載の発明は、管継手本体と、該管継手本体に連結された外筒部と、該外筒部の先端部に連結された袋ナットと、前記管継手本体から前記外筒部及び前記袋ナットの内側に延びる内筒部とで囲まれた受口を備え、該受口内に抜止めリングとシール用ゴム環が装着されており、該受口内に接続すべき合成樹脂管の挿口を挿入するだけのワンタッチの操作で前記抜止めリングにて抜出し防止可能状態に接続できる管継手であって、前記受口内における、前記抜止めリング及び前記シール用ゴム環の装着位置よりも奥側の部分に、前記合成樹脂管の挿口の先端が接触したときに音が発生してその挿入確認を行うことができる発音機構が設けられている管継手である。
【０００９】
本願の請求項２に記載の発明は、前記外筒部が透明樹脂からなる請求項１に記載の管継手である。
【００１０】
本願の請求項３に記載の発明は、前記発音機構が、前記内筒部のゴム環装着溝及び前記抜止めリング装着位置よりも奥側の部分の前記内筒部の外周面に発音体落し込み溝が設けられ、該発音体落し込み溝と前記抜止めリング及び前記ゴム環の装着位置との間の前記内筒部の外周面に発音体が仮着されているものからなる請求項１または２に記載の管継手である。
【００１１】
本願の請求項４に記載の発明は、前記発音体が、一部切開された環状をなし、断面形状が扇形とされたものからなる請求項３に記載の管継手である。
【００１２】
本願の請求項５に記載の発明は、管継手本体と、該管継手本体に連結された袋ナットと、前記管継手本体から前記袋ナットの内側に延びる内筒部とで囲まれた受口を備え、該受口内に抜止めリングとシール用ゴム環が装着されており、該受口内に接続すべき合成樹脂管の挿口を挿入するだけのワンタッチの操作で前記抜止めリングにて抜出し防止可能状態に接続できる管継手であって、前記受口内における、前記抜止めリング及び前記シール用ゴム環の装着位置よりも奥側の部分に、前記合成樹脂管の挿口の先端が接触したときに音が発生してその挿入確認を行うことができる発音機構が設けられている管継手である。
【００１３】
本願の請求項６に記載の発明は、前記発音機構が、環状の発音体からなり、該発音体が、その断面形状が受口開口側に膨出する部分を有するように形成されており、その膨出部分に前記合成樹脂管の挿口の先端が接触したときに受口の奥側に反転して音が発生可能とされているものからなる請求項５に記載の管継手である。
【００１４】
本願の請求項７に記載の発明は、前記発音機構が、受口奥部に設けられた発音体装着部と、該発音体装着部に装着される環状の発音体とからなり、該発音体が径方向の中央部を支点として回動自在とされ、内周部に受口開口側に突出する突出部が設けられ、外周側に発音部が設けられたものからなり、前記発音体装着部にその発音部が係止されるように装着された前記発音体の突出部に前記合成樹脂管の挿口の先端が接触したときに発音部の係止状態が外れて受口を打つ音が発生可能とされている請求項５に記載の管継手である。
【００１５】
本願の請求項８に記載の発明は、前記発音機構が、環状の発音体からなり、該発音体が、断面形状が三角形状に受口開口側に突出する部分を有していて、その突出部分に前記合成樹脂管の挿口の先端が接触したときに潰れて音が発生可能とされているものからなる請求項５に記載の管継手である。
【００１６】
【作用】
本願の請求項１に係る発明の管継手は、前記受口内における、前記抜止めリング及び前記シール用ゴム環の装着位置よりも奥側の部分に、前記合成樹脂管の挿口の先端が接触したときに音が発生してその挿入確認を行うことができる発音機構が設けられていることにより、受口内の抜止めリングとシール用ゴム環との間に合成樹脂管の挿口を挿入していくと、その先端が発音機構に接触して音を発生するので、その音を目安として、受口内の適正な奥部まで合成樹脂管の挿口の先端が挿入されたことを確認することができる。
【００１７】
本願の請求項２に係る発明の管継手のように、前記外筒部が透明樹脂からなることにより、合成樹脂管の挿口の先端が発音機構に接触するのを外部から目視することができるので、目視確認を併用することができる。
【００１８】
本願の請求項３に係る発明の管継手のように、前記発音機構が、前記内筒部のゴム環装着溝及び前記抜止めリング装着位置よりも奥側の部分の前記内筒部の外周面に発音体落し込み溝が設けられ、該発音体落し込み溝と前記抜止めリング及び前記シール用ゴム環の装着位置との間の前記内筒部の外周面に発音体が仮着されているものからなると、受口内の抜止めリングとシール用ゴム環との間に合成樹脂管の挿口を挿入していくと、発音体仮着溝に仮着された発音体が合成樹脂管の挿口により押されて、音を発しながら発音体落込み溝内に落し込まれるので、その音を目安として、受口内の適正な奥部まで合成樹脂管の挿口の先端が挿入されたことを確認することができる。
【００１９】
本願の請求項４に係る発明の管継手のように、前記発音体が、一部切開された環状をなし、断面形状が扇形とされたものからなると、発音体の拡縮径が容易となる。
【００２０】
本願の請求項５の発明の管継手は、前記受口内における、前記抜止めリング及び前記シール用ゴム環の装着位置よりも奥側の部分に、前記合成樹脂管の挿口の先端が接触したときに音が発生してその挿入確認を行うことができる発音機構が設けられていることにより、受口内の抜止めリングとシール用ゴム環との間に合成樹脂管の挿口を挿入していくと、その先端が発音機構に接触して音を発生するので、その音を目安として、受口内の適正な奥部まで合成樹脂管の挿口の先端が挿入されたことを確認することができる。
【００２１】
本願の請求項６に係る発明の管継手のように、前記発音機構が、環状の発音体からなり、該発音体が、その断面形状が受口開口側に膨出する部分を有するように形成されており、その膨出部分に前記合成樹脂管の挿口の先端が接触したときに受口の奥方に反転して音が発生可能とされていると、受口内の抜止めリングとシール用ゴム環との間に合成樹脂管の挿口を挿入していくと、その先端により発音体が押されて音を発しながら受口の奥方に反転されるので、その音を目安として、受口内の適正な奥部まで合成樹脂管の挿口の先端が挿入されたことを確認することができる。
【００２２】
本願の請求項７に係る発明の管継手のように、前記発音機構が、受口奥部に設けられた発音体装着部と、該発音体装着部に装着される環状の発音体とからなり、該発音体が径方向の中央部を支点として回動自在とされ、内周部に受口開口側に突出する突出部が設けられ、外周側に発音部が設けられたものからなり、前記発音体装着部にその発音部が係止されるように装着された前記発音体の突出部に前記合成樹脂管の挿口の先端が接触したときに発音部の係止状態が外れて受口を打つ音が発生可能とされていると、受口内の抜止めリングとシール用ゴム環との間に合成樹脂管の挿口を挿入していくと、その先端により発音体の突出部が押されて、その発音部が受口を打つ音が発生するので、その音を目安として、受口内の適正な奥部まで合成樹脂管の挿口の先端が挿入されたことを確認することができる。
【００２３】
本願の請求項８に係る発明の管継手のように、前記発音機構が、環状の発音体からなり、該発音体が、断面形状が三角形状に受口開口側に突出する部分を有していて、その突出部分に前記合成樹脂管の挿口の先端が接触したときに潰れて音が発生可能とされているものからなると、受口内の抜止めリングとシール用ゴム環との間に合成樹脂管の挿口を挿入していくと、その先端により発音体の突出部が押されて、その発音部が突出部分を押し潰す音が発生するので、その音を目安として、受口内の適正な奥部まで合成樹脂管の挿口の先端が挿入されたことを確認することができる。
【００２４】
【発明の実施の形態】
以下、本発明の実施の形態を図面を参照して説明する。
図１は、本発明の管継手の一例を示す断面図である。
図１に示すように、この管継手１は、管継手本体１１と、管継手本体１１に連結された外筒部１２と、外筒部１２の先端部に連結された袋ナット１３と、管継手本体１１から外筒部１２及び袋ナット１３の内側に延びる内筒部１４とで囲まれた受口を備えている。
【００２５】
管継手本体１１は、脱鉛青銅や砲金等の金属材料からなり、一端部の外周面に周方向に沿って外筒部１２の他端部の係止凸部１２３が嵌合する係止凹部１１１が設けられ、中央部の外周に周方向に沿って突条１１２が設けられ、他端部に挿口１１３が設けられている。
【００２６】
外筒部１２は、透明ポリフェニレンサルファイド等の透明樹脂からなり、先端部の外周面に周方向に沿って袋ナット１３の基端部の係止凸部１３２が嵌合する係止凹部１２１が設けられ、中央部の外周に周方向に沿って突条１２２が設けられ、基端部の内周面に周方向に沿って管継手本体１１の係止凹部１１１に嵌合する係止凸部１２３が設けられている。外筒部１２の先端部の内周面に周方向に沿って後述する抜け止めリンク１５を装着する切欠き部１２４が設けられている。
【００２７】
袋ナット１３は、砲金等の金属材料からなり、接続すべき合成樹脂管の挿口を挿入する管挿入口１３１が設けられ、基端部の内周面に周方向に沿って外筒部１２の係止凹部１２１に嵌合する係止凸部１３２が設けられている。袋ナット１３は、先端部の内周面（管挿入口１３１面）に周方向に沿って開口端側に向かうにつれて次第に縮径する傾斜面１３３が設けられ、傾斜面１３３が設けられた部分から基端部側は段部１３４となされている。
【００２８】
内筒部１４は、透明ポリフェニレンサルファイド等の透明樹脂からなり、管継手本体１１の一端部に外筒部１２及び袋ナット１３の内側に延びるように延設されており、略中央部の外周に周方向に沿ってゴム環装着溝１４１が設けられ、基端部の外周面に周方向に沿って発音体落込み溝１４２が設けられている。図４にも示すように、内筒部１４には発音体落込み溝１４２が設けられた部分に隣接する部分のやや受口開口側の外周面に周方向に沿って１２０°程度の角度にて外周方向に向けて開くような発音体仮着溝１４３が設けられている。
【００２９】
抜止めリング１５は、砲金等の金属材料からなり、図３にも示すように、外周面に周方向に沿って袋ナット１３の傾斜面１３３に対応する傾斜面１５１が設けられ、内周面には受口内に挿入される合成樹脂管の挿口に外周に食い込む刃部１５２が設けられている。抜止めリング１５は軸方向に沿ってスリット部１５３を有していて、拡縮径ができるようになっている。
【００３０】
１７は発音体であって、バネ鋼等の金属材料からなり、図４及び図５にも示すように、一部切開された環状をなし、断面形状が扇形とされたものからなる。発音体１７は、図４（ａ）に示すように、受口内に合成樹脂管の挿口が挿入される前は内筒部１４の発音体仮着溝１４３に装着され、図４（ｂ）に示すように、受口内に合成樹脂管Ｐの挿口Ｐ１が挿入された後は、合成樹脂管Ｐの挿口Ｐ１の先端により押されて発音体落込み溝１４２内に落し込まれるようにして使用される。
【００３１】
そして、図１に示すように、内筒部１４の発音体仮着溝１４３に発音体１７が仮着されるとともにゴム環装着溝１４１にシール用ゴム環１６が装着され、管継手本体１１の一端部に外筒部１２の基端部が係止凹部１１１に係止凸部１２３が嵌合されるようにして接続され、外筒部１２の先端部に袋ナット１３の基端部が、両者内に抜止めリング１５を内包するようにして、係止凹部１２１に係止凸部１３２を嵌合するように接続されて、管継手本体１１と外筒部１２と袋ナット１３と内筒部１４とで囲まれた受口を有する管継手１が形成される。
【００３２】
この管継手１は、図２に示すように、受口内に接続すべき合成樹脂管Ｐの挿口Ｐ１を挿入するだけのワンタッチの操作で抜止めリング１６にて抜出し防止可能状態に接続できるようになっている。
即ち、受口内の抜止めリング１５とシール用ゴム環１６との間に合成樹脂管Ｐの挿口Ｐ１を挿入していくと、発音体仮着溝１４３に仮着された発音体１７が合成樹脂管Ｐの挿口Ｐ１により押されて、音を発しながら発音体落込み溝１４２内に落し込まれる。この音を目安として、受口内の適正な奥部まで合成樹脂管Ｐの挿口Ｐ１の先端が挿入されたことを確認することができる。
また、外筒部１２を透明樹脂からなるものとしておくことにより、発音体仮着溝１４３に仮着された発音体１７が合成樹脂管Ｐの挿口Ｐ１により押されて発音体落し込み溝１４２に落し込まれる状態を外部から目視することができるので、目視確認を併用することができる。
このとき、シール用ゴム環１６が合成樹脂管Ｐの内周面に圧接されてシール性が確保された状態となる。
【００３３】
その後、合成樹脂管Ｐを引き抜く方向に引っ張ると、抜止めリング１５は傾斜面１５１が袋ナット１３の傾斜面１３３に摺動することにより縮径し、その刃部１５２が合成樹脂管管Ｐの外周面に食い込み、合成樹脂管Ｐが管継手１の受口内から抜け出るのが防止された状態となる。
また、図４（ｂ）に示すように、発音体１７が断面形状が扇形とされているので、その角部に合成樹脂管Ｐの内周面に噛み込んで、これも合成樹脂管Ｐが管継手１の受口から抜け出すのを一層防止するように作用する。
【００３４】
図６は、本発明の管継手の別の例を示す断面図である。
図６に示すように、この管継手２は、管継手本体２１と、管継手本体２１に連結された外筒部２２と、外筒部２２の先端部に連結された袋ナット２３と、管継手本体２１から外筒部２２及び袋ナット２３の内側に延びる内筒部２４とで囲まれた受口を備えている。
【００３５】
管継手本体２１、袋ナット２３及び発音体２７は、図１等を参照して説明した外筒部２１の構造と同じである。同じ構造部分は図中に対応する図番を付してその詳細な説明と省略する。
【００３６】
外筒部２２は、基端部の内周面の係止凸部２２３が設けられた部分よりもやや中央側に発音体落込み溝２４２が設けられるとともに、発音体落込み溝２４２が設けられた部分に隣接する部分のやや受口開口側の内周面に発音体仮着溝２４３が設けられていること以外は、図１等を参照して説明した外筒部２１の構造と同じである。同じ構造部分は図中に対応する図番を付してその詳細な説明と省略する。
【００３７】
内筒部２４は、発音体落込み溝１４２及び発音体仮着溝１４３に相当する部分を有しないこと以外は、図１等を参照して説明した外筒部２１の構造と同じである。同じ構造部分は図中に対応する図番を付してその詳細な説明と省略する。
【００３８】
この管継手１は、図６に示すように、受口内に接続すべき合成樹脂管Ｐの挿口Ｐ１を挿入するだけのワンタッチの操作で抜止めリング２６にて抜出し防止可能状態に接続できるようになっている。
即ち、受口内の抜止めリング２５とシール用ゴム環２６との間に合成樹脂管Ｐの挿口Ｐ１を挿入していくと、発音体仮着溝２４３に仮着された発音体２７が合成樹脂管Ｐの挿口Ｐ１により押されて、音を発しながら発音体落込み溝２４２内に落し込まれる。この音を目安として、受口内の適正な奥部まで合成樹脂管Ｐの挿口Ｐ１の先端が挿入されたことを確認することができる。
また、外筒部２２を透明樹脂からなるものとしておくことにより、発音体仮着溝２４３に仮着された発音体２７が合成樹脂管Ｐの挿口Ｐ１により押されて発音体落し込み溝２４２に落し込まれる状態を外部から目視することができるので、目視確認を併用することができる。
このとき、シール用ゴム環２６が合成樹脂管Ｐの内周面に圧接されてシール性が確保された状態となる。
【００３９】
その後、合成樹脂管Ｐを引き抜く方向に引っ張ると、抜止めリング２５は傾斜面２５１が袋ナット２３の傾斜面２３３に摺動することにより縮径し、その刃部２５２が合成樹脂管管Ｐの外周面に食い込み、合成樹脂管Ｐが管継手２の受口内から抜け出るのが防止された状態となる。
【００４０】
図７は本発明の管継手の更に別の例を示す断面図である。
図７に示すように、この管継手３は、管継手本体３１と、管継手本体３１に連結された袋ナット３２と、管継手本体３１から袋ナット３２の内側に延びる内筒部３３とで囲まれた受口を備えている。
【００４１】
管継手本体３１は、脱鉛青銅や砲金等の金属材料からなり、一端部の外周面に周方向に沿って袋ナット３２の他端部の係止凸部３２３が嵌合する係止凹部３１１が設けられ、中央部の外周に周方向に沿って突条３１２が設けられ、他端部に挿口３１３が設けられている。
【００４２】
袋ナット３２は、砲金等の金属材料からなり、接続すべき合成樹脂管の挿口を挿入する管挿入口３２１が設けられ、基端部の内周面に周方向に沿って管継手本体１１の係止凹部１１１に嵌合する係止凸部３２２が設けられている。袋ナット３２は、中央部の内周面（管挿入口１３１面）に周方向に沿って開口端側に向かうにつれて次第に縮径する傾斜面３２３が設けられている。
３２４は挿入確認窓である。
【００４３】
内筒部３３は、砲金等の金属材料からなり、管継手本体３１の一端部から袋ナット３２の内側に延びるように設けられており、略中央部の外周面に周方向に沿ってゴム環装着溝３３１が設けられている。
抜止めリング３４は、砲金等の金属材料からなり、外周面に周方向に沿って袋ナット３２の傾斜面３２３に対応する傾斜面３４１が設けられ、内周面に受口内に挿入される合成樹脂管の挿口に外周に食い込む刃部３４２が設けられている。抜止めリング３４は軸方向に沿ってスリット部を有していて、拡縮径ができるようになっている。
【００４４】
３６は発音体であって、図８にも示すように、肉薄の環状体からなり、その断面形状が軸方向に対して、内方に向かうにつれて次第に受口開口側となる一側方側に膨出するように形成されており、膨出方向から押圧することにより受口奥方側となる他側方側に音を発しながら反転するような構造となっている。
受口奥方となる継手本体部３１の一端面には、発音体３６の外周部分を支持する発音体支持部３１４が設けられるともに、その内周側に、発音体支持部３１４よりも奥方に周方向に窪むような空間３１５が設けられていて、発音体３７が一側方側から他側方側に反転できるようになされている。
【００４５】
そして、図７に示すように、継手本体３１の発音体支持部３１４に発音体３６が装着されるとともにゴム環装着溝３３１にシール用ゴム環３５が装着され、継手本体３１の一端部に、抜止めリング３４を内包する袋ナット３２の基端部が係止凹部３１１に係止凸部３２２が嵌合されるようにして接続されて、管継手本体３１と袋ナット３２と内筒部３３とで囲まれた受口を有する管継手３が形成される。
【００４６】
この管継手３は、受口内に図示しない接続すべき合成樹脂管の挿口を挿入するだけのワンタッチの操作で抜止めリング３４にて抜出し防止可能状態に接続できるようになっている。
即ち、受口内の抜止めリング３４とシール用ゴム環３５との間に合成樹脂管の挿口を挿入していくと、発音体３６が合成樹脂管の挿口の先端により押されて音を発しながら空間３１５内に反転される。この音を目安として、受口内の適正な奥部まで合成樹脂管の挿口の先端が挿入されたことを確認することができる。
また、挿入確認窓３２４より、合成樹脂管の挿口の先端が通過したことを外部から目視することができるので、目視確認を併用することができる。このとき、シール用ゴム環３４が合成樹脂管の内周に圧接されてシール性が確保された状態となる。
【００４７】
その後、合成樹脂管を引き抜く方向に引っ張ると、抜止めリング３４は傾斜面３４１が袋ナット３２の傾斜面３２３に摺動することにより縮径し、その刃部３４２が合成樹脂管管の外周面に食い込み、合成樹脂管が管継手３の受口内から抜け出るのが防止された状態となる。
【００４８】
発音体としては、図９〜図１１に示すように、環状板からなり、その断面形状が軸方向に対して、中央に向かうにつれて次第に受口開口側となる一側方側に膨出するように形成されており、膨出方向から押圧することにより受口奥側となる他側方側に音を発しながら反転するような構造となっている発音体３７〜３９を使用してもよい。
【００４９】
図１２は本発明の管継手の更に別の例を示す断面図である。
図１２に示すように、この管継手４は、管継手本体４１と、管継手本体４１に連結された袋ナット４２と、管継手本体４１から袋ナット４２の内側に延びる内筒部４３とで囲まれた受口を備えている。
【００５０】
袋ナット４２、内筒部４３及び抜止めリング４４は、それぞれ、図７を参照して説明した袋ナット体３２、内筒部３３及び抜止めリング３４と同じ構造である。従って、図中に対応する図番を付してその詳細な説明は省略する。
【００５１】
管継手本体４１は、受口奥方となる一端部に、発音部係止部４１４ａを有する発音体装着部４１４が設けられていること以外は、図７を参照して説明した管継手本体３１の構造と同じである。
発音体装着部４１４は、受口奥方に直立する突当たり部４１４ｂと、内周側に周方向に沿って設けられた凹溝部４１４ｃと、外周側に周方向に沿って受口奥方に延びるように穿設された発音部係止部４１４ａとからなる。
尚、図７と同じ同じ構造部分は図中に対応する図番を付してその詳細な説明と省略する。
【００５２】
４６は発音体であって、図１３にも示すように、肉薄環状板からなり、周方向に幅広部４６Ａと幅狭部４６Ｂが交互に設けられており、その幅広部Ａの、内周側に受口開口側となる一側面側に突出する突出部４６１が設けられ、中央部の他側面側に支点部４６２が設けられ、外周縁に他側面側に曲折する発音部４６３が設けられ、その幅狭部４６Ｂの内周側に係止部４６４が設けられたものからなる。
【００５３】
この発音体４６は、図１３（ａ）に示すように、発音体装着部４１４に、それぞれ、その支点部４６２が突当たり部４１４ｂされ、その係止部４６４が凹溝４１４ｃに係止され、発音部４６３が発音部係止部４１４ａに係止されて、突出部４６１が受口内の接続すべき合成樹脂管の挿口が挿入される部分に突出するように装着される。
【００５４】
そして、図１４に示すように、受口内に接続すべき合成樹脂管Ｐの挿口Ｐ１が挿入されたときに、合成樹脂管Ｐの挿口Ｐ１の先端が突出部４６１を押圧し、これにより発音体４６が支点部４６２を中心にして回動して、係止部４６４が凹溝４１４ｃから外れるとともに、発音部４６３が発音部係止部４１４ａから外れて袋ナット４２の基端部の内周面に打ち付けられて音が発生するようにして使用される。
【００５５】
そして、図１２に示すように、管継手本体４１の発音体装着部４１４に発音体４６が装着されるとともにゴム環装着溝４３１にシール用ゴム環４５が装着され、管継手本体４１の一端部に、抜止めリング４４を内包する袋ナット４２の基端部が係止凹部４１１に係止凸部４２２が嵌合されるようにして接続されて、管継手本体４１と袋ナット４２と内筒部４３とで囲まれたた受口を有する管継手４が形成される。
【００５６】
この管継手４は、受口内に図示しない接続すべき合成樹脂管の挿口を挿入するだけのワンタッチの操作で抜止めリング４４にて抜出し防止可能状態に接続できるようになっている。
即ち、受口内の抜止めリング４４とシール用ゴム環４５との間に合成樹脂管の挿口を挿入していくと、図１４にも示すように、合成樹脂管Ｐの挿口Ｐ１の先端が発音体４６の突出部４６１を押圧し、これにより発音体４６が支点部４６２を中心にして回動して、係止部４６４が凹溝４１４ｃから外れるとともに、発音部４６３が発音部係止部４１４ａから外れて袋ナット４２の基端部の内周面に打ち付けられて音が発生する。この音を目安として、受口内の適正な奥部まで合成樹脂管Ｐの挿口Ｐ１の管端が挿入されたことを確認することができる。
また、挿入確認窓４２４より、合成樹脂管の挿口の先端が通過したことを外部から目視することができるので、目視確認を併用することができる。
このとき、シール用ゴム環４４が合成樹脂管の内周に圧接されてシール性が確保された状態となる。
【００５７】
その後、合成樹脂管を引き抜く方向に引っ張ると、抜止めリング４４は傾斜面４４１が袋ナット４２の傾斜面４２３に摺動することにより縮径し、その刃部４４２が合成樹脂管管の外周面に食い込み、合成樹脂管が管継手４の受口内から抜け出るのが防止された状態となる。
【００５８】
図１５は本発明の管継手の更に別の例を示す断面図である。
図１５に示すように、この管継手５は、管継手本体５１と、管継手本体５１に連結された袋ナット５２と、管継手本体５１から袋ナット５２の内側に延びる内筒部５３とで囲まれた受口を備えている。
【００５９】
袋ナット５２、内筒部５３及び抜止めリング５４は、それぞれ、図７を参照して説明した袋ナット体５２、内筒部３３及び抜止めリング３４と同じ構造である。従って、図中に対応する図番を付してその詳細な説明は省略する。
【００６０】
管継手本体５１は、受口奥部となる一端面に、発音体装着部５１４が設けられていること以外は、図７を参照して説明した管継手本体３１の構造と同じである。同じ構造部分は図中に対応する図番を付してその詳細な説明と省略する。
【００６１】
５６は発音体であって、図１６にも示すように、環状体からなり、周方向に１６分割されていて、（ｂ）に示すような断面形状が三角形の部分５６Ａと、（ｃ）に示すような断面形状が台形の部分５６Ｂとが一つおきに配列されている。そして、断面形状が三角形の部分５６Ａが、接続すべき合成樹脂管の挿口が挿入されたときに、合成樹脂管の挿口の先端が当たって、音を発しながら断面形状が台形の部分５６Ｂと同じ形状に押し潰されるような構造となっている。
【００６２】
そして、図１５に示すように、管継手本体５１の発音体装着部５１４に発音体５６が装着されるとともにゴム環装着溝５３１にシール用ゴム環５５が装着され、管継手本体５１の一端部に、抜止めリング５４を内包する袋ナット５２の基端部が係止凹部５１１に係止凸部５２２が嵌合されるようにして接続されて、管継手本体５１と袋ナット５２と内筒部５３とで囲まれた受口を有する管継手５が形成される。
【００６３】
この管継手５は、受口内に図示しない接続すべき合成樹脂管の挿口を挿入するだけのワンタッチの操作で抜止めリング５４にて抜出し防止可能状態に接続できるようになっている。
即ち、受口内の抜止めリング５４とシール用ゴム環５５との間に合成樹脂管の挿口を挿入していくと、断面形状が三角形の部分５６Ａに、接続すべき合成樹脂管の挿口の先端が当たって、音を発しながら断面形状が台形の部分５６２と同じ形状に押し潰される。この音を目安として、受口内の適正な奥部まで合成樹脂管の挿口の管端が挿入されたことを確認することができる。
また、挿入確認窓５２４より、合成樹脂管の挿口の先端が通過したことを外部から目視することができるので、目視確認を併用することができる。
このとき、シール用ゴム環５４が合成樹脂管の内周面に圧接されてシール性が確保された状態となる。
【００６４】
その後、合成樹脂管を引き抜く方向に引っ張ると、抜止めリング５４は傾斜面５４１が袋ナット５２の傾斜面５２３に摺動することにより縮径し、その刃部５４２が合成樹脂管管の外周面に食い込み、合成樹脂管が管継手５の受口内から抜け出るのが防止された状態となる。
【００６５】
【発明の効果】
本発明の管継手は、上記のとおりの構成とされているので、暗い場所や周囲に障害物があって見え難い施工現場であっても、受口内の適正な奥部まで合成樹脂管の端部が差し込まれたことを発音機構の音を目安にして確認しつつ接続作業を確実に行うことができて、漏水につながる施工不良が発生することがない。
【図面の簡単な説明】
【図１】本発明の管継手の一例を説明する断面図である。
【図２】図１に示す管継手の受口に接続すべき合成樹脂管の挿口を接続する過程を説明する断面図である。
【図３】図１に示す管継手に使用される抜止めリングの一例を示す斜視図である。
【図４】図１に示す管継手の受口に接続すべき合成樹脂管の挿口を接続する過程を説明する断面図でり、（ａ）は接続前の状態を示す断面図、（ｂ）は接続中の状態を示す断面図である。
【図５】図１に示す管継手に使用される発音体の一例を示す平面図である。
【図６】本発明の管継手の別の例を説明する断面図である。
【図７】本発明の管継手の更に別の例を説明する一部断面図である。
【図８】図７に示す管継手に使用される発音体の一例を説明する平面図である。
【図９】図７に示す管継手に使用される発音体の別の例を説明する平面図である。
【図１０】図７に示す管継手に使用される発音体の更に別の例を説明する平面図である。
【図１１】図７に示す管継手に使用される発音体の更に別の例を説明する平面図である。
【図１２】本発明の管継手の更に別の例を説明する一部断面図である。
【図１３】図１２に示す管継手に使用される発音体の一例の説明図であり、（ａ）は（ｂ）におけるＩ−Ｉ線に沿う断面図、（ｂ）はその平面図である。
【図１４】図１２に示す管継手に使用される発音体の動作を説明する平面図である。
【図１５】本発明の管継手の更に別の例を説明する一部断面図である。
【図１６】図１５に示す管継手に用いられる発音体の一例の説明図であり、（ａ）はその平面図、（ｂ）はそのＩＩ−ＩＩ線に沿う断面図、（ｃ）はそのＩＩＩ−ＩＩＩ線に沿う断面図である。
【図１７】従来の管継手の一例を示す一部断面図である。
【符号の説明】
１，２，３，４，５管継手
２合成樹脂管
１１，２１，３１，４１，５１管継手本体
１２，２２外筒部
１３，２３，３２、４２，５２袋ナット
１４，２４，３３，４３，５３内筒部
１５，２５，３４，４４，５４抜止めリング
１６，２６，３５，４５，５５シール用ゴム環
１７，２７，３６，４６，５６発音体[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a pipe joint having a socket which can be connected to a state where it can be prevented from being pulled out by a one-touch operation of merely inserting an insertion port of a synthetic resin pipe.
[0002]
[Prior art]
Conventionally, as a pipe joint having a socket which can be connected so as to have a sealing function and a retaining function simply by inserting an insertion opening of a synthetic resin pipe, for example, as shown in FIG. 17, a cap nut a having a tapered inner surface is used. And a lock ring b and a spacer ring c having a locking blade mounted on the inner surface thereof, and a pipe insertion portion e at one end of a joint body d provided with a screw d1 that can be screwed to the cap nut a. A pipe insertion portion e is known in which a water stop ring f is attached to the outer periphery along the circumferential direction (see Patent Document 1).
[0003]
When the distal end of the pipe p to be connected between the lock ring b and the water stop ring f in the pipe insertion portion e is inserted to an appropriate depth, the water stop ring f is attached to the inner surface of the pipe P. The water stop ring f mounted on the outer periphery of the insertion portion e can be pressed against and sealed, and then, when the connected pipe p is pulled in the pulling direction, the end of the lock ring b comes into contact with the tapered inner surface of the cap nut a. The diameter of the pipe is reduced, and the locking blade cuts into the surface of the pipe p to prevent the pipe p from coming out of the pipe insertion portion e of the pipe joint.
[0004]
In the case of the conventional pipe joint as described above, in order to connect the pipe p inside the pipe insertion section e so as to have a sealing function and a retaining function, the pipe p is extended to an appropriate depth inside the pipe insertion section e. It is an essential condition to insert the tip of.
As a countermeasure, provide an insertion confirmation window on the cap nut to check the insertion state of the pipe from the outside, write an insertion mark on the pipe to be inserted, and insert the pipe to the appropriate depth of the pipe insertion part Like that.
[0005]
However, in the actual construction site, in dark places or places where there are obstacles in the surroundings and it is difficult to see, etc., the installer must perform the connection work from the outside of the pipe joint while accurately checking that the conditions are satisfied. Can be difficult.
In such a case, even though the installer intends to insert the pipe p to an appropriate depth inside the pipe insertion part e, a case where the pipe p is not sufficiently inserted occurs, which is likely to cause a construction failure leading to water leakage. There are points.
[0006]
[Patent Document 1]
JP-A-2001-193883 (refer to claims etc.)
[0007]
[Problems to be solved by the invention]
The present invention solves the conventional problems as described above, and performs connection while confirming that the end of the synthetic resin tube has been inserted to an appropriate depth in the receptacle by using a sound generation mechanism as a guide. The purpose of the present invention is to provide a pipe joint that can be used.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 of the present application provides a pipe joint main body, an outer cylinder connected to the pipe joint main body, a cap nut connected to a tip end of the outer cylinder, and the pipe joint main body. A receiving port surrounded by an outer cylindrical portion and an inner cylindrical portion extending inside the cap nut is provided. A retaining ring and a sealing rubber ring are mounted in the receiving port. A pipe joint which can be connected to a state in which it can be prevented from being pulled out by said retaining ring by a one-touch operation just by inserting an insertion port of a resin pipe, wherein said retaining ring and said sealing rubber ring are mounted in said receiving port. This is a pipe joint provided with a sound generating mechanism capable of generating a sound when the front end of the insertion opening of the synthetic resin tube comes into contact with a portion on the back side of the position and confirming the insertion.
[0009]
The invention according to claim 2 of the present application is the pipe joint according to claim 1, wherein the outer cylindrical portion is made of a transparent resin.
[0010]
In the invention according to claim 3 of the present application, the sounding mechanism is configured such that a sounding body is dropped on an outer peripheral surface of the inner cylindrical portion at a portion deeper than a rubber ring mounting groove and a retaining ring mounting position of the inner cylindrical portion. The sound generator is temporarily attached to an outer peripheral surface of the inner cylinder portion between the sound generator drop groove and the mounting position of the retaining ring and the rubber ring. Or the pipe joint according to 2.
[0011]
The invention according to claim 4 of the present application is the pipe joint according to claim 3, wherein the sounding body has a partially cut annular shape and has a fan-shaped cross section.
[0012]
The invention according to claim 5 of the present application is directed to a socket surrounded by a pipe joint body, a cap nut connected to the pipe joint body, and an inner cylindrical portion extending from the pipe joint body to the inside of the cap nut. A retaining ring and a rubber ring for sealing are mounted in the receptacle, and the retaining ring is pulled out by a one-touch operation just by inserting the insertion opening of the synthetic resin pipe to be connected in the receptacle. A pipe joint that can be connected in a preventable state, in which the tip of the synthetic resin pipe insertion port is in contact with a portion on the back side of the mounting position of the retaining ring and the sealing rubber ring in the receiving port. This is a pipe joint provided with a sound generating mechanism capable of generating a sound and confirming its insertion.
[0013]
The invention according to claim 6 of the present application is configured such that the sounding mechanism is formed of an annular sounding body, and the sounding body is formed so as to have a portion whose cross-sectional shape swells toward the receptacle opening side, 6. The pipe joint according to claim 5, wherein when the tip of the insertion port of the synthetic resin tube comes into contact with the bulged portion, the pipe pipe is turned to the inner side of the socket to generate a sound.
[0014]
In the invention according to claim 7 of the present application, the sounding mechanism includes a sounding body mounting portion provided at a back portion of a receiving port, and a ring-shaped sounding body mounted on the sounding body mounting portion. Is provided so as to be rotatable around a central portion in a radial direction, provided with a protruding portion that protrudes toward the receiving opening on the inner peripheral portion, and provided with a sound generating portion on the outer peripheral side. When the tip of the mouth of the synthetic resin tube comes into contact with the protrusion of the sounding body mounted so that the sounding portion is locked to the sounding portion, the sound of the sounding portion is released and the sound of hitting the socket is released. The pipe joint according to claim 5, wherein the pipe joint can be generated.
[0015]
The invention according to claim 8 of the present application is characterized in that the sounding mechanism comprises a ring-shaped sounding body, and the sounding body has a portion having a triangular cross-sectional shape and protruding toward the receptacle opening side. The pipe joint according to claim 5, wherein the pipe joint is configured to be crushed when a tip of an insertion opening of the synthetic resin pipe comes into contact with the portion to generate a sound.
[0016]
[Action]
In the pipe joint of the invention according to claim 1 of the present application, the tip of the insertion opening of the synthetic resin pipe comes into contact with a portion of the receiving port that is deeper than a mounting position of the retaining ring and the sealing rubber ring. When a sound is generated, a sound generation mechanism that can confirm the insertion is provided, so that the insertion port of the synthetic resin pipe is inserted between the retaining ring in the receptacle and the rubber ring for sealing. As the tip goes into contact with the sound-generating mechanism, a sound is generated, so use the sound as a guide to confirm that the tip of the synthetic resin pipe opening has been inserted to the appropriate depth inside the receptacle. Can be.
[0017]
As in the pipe joint of the invention according to claim 2 of the present application, since the outer cylindrical portion is made of a transparent resin, it can be visually observed from the outside that the tip of the insertion opening of the synthetic resin tube contacts the sound generation mechanism. Therefore, visual confirmation can be used together.
[0018]
Like the pipe joint of the invention according to claim 3 of the present application, the sound generation mechanism includes a rubber ring mounting groove of the inner cylindrical portion and an outer peripheral surface of the inner cylindrical portion at a position deeper than the retaining ring mounting position. A sound-generating body is provided on the outer peripheral surface of the inner cylindrical portion between the sound-generating body-dropping groove and the mounting position of the retaining ring and the rubber ring for sealing. When the synthetic resin tube insertion hole is inserted between the retaining ring in the receiving port and the sealing rubber ring, the sounding body temporarily attached to the sounding body temporary attachment groove inserts the synthetic resin tube. It is pushed by the mouth and drops into the sounding body drop groove while emitting a sound, so using that sound as a guide, make sure that the end of the synthetic resin pipe insertion port has been inserted to the appropriate depth inside the receptacle. You can check.
[0019]
As in the pipe joint of the invention according to claim 4 of the present application, when the sounding body is formed in a partially cut annular shape and has a fan-shaped cross-section, the diameter of the sounding body can be easily expanded and reduced.
[0020]
In the pipe joint according to the invention of claim 5 of the present application, the tip of the insertion opening of the synthetic resin pipe is in contact with a portion on the back side of the mounting position of the retaining ring and the sealing rubber ring in the socket. When a sound is generated, a sound generation mechanism that can check the insertion of the sound is provided, so that the synthetic resin pipe opening is inserted between the retaining ring and the rubber ring for sealing in the receptacle. As the tip goes, the tip touches the sound generation mechanism and generates a sound, so using that sound as a guide, you can check that the tip of the synthetic resin tube insertion port has been inserted to the appropriate depth inside the receptacle. it can.
[0021]
Like the pipe joint of the invention according to claim 6 of the present application, the sounding mechanism is formed of a ring-shaped sounding body, and the sounding body is formed so as to have a portion whose cross-sectional shape bulges toward the socket opening side. When the tip of the synthetic resin tube is in contact with the swelling portion, the sound can be generated by reversing to the back of the socket, and the retaining ring and the seal inside the socket can be used. Inserting the synthetic resin tube opening between the rubber ring and the tip of the synthetic resin tube pushes the sounding body and the sound is emitted and the sound is inverted to the back of the socket. It can be confirmed that the front end of the insertion opening of the synthetic resin tube has been inserted to an appropriate depth.
[0022]
Like the pipe joint of the invention according to claim 7 of the present application, the sounding mechanism includes a sounding body mounting portion provided at the back portion of the socket and an annular sounding body mounted on the sounding body mounting portion. The sounding body is rotatable about a radial center portion, a projection is provided on the inner peripheral portion to project toward the receiving opening side, and a sounding portion is provided on the outer peripheral side; When the tip of the insertion opening of the synthetic resin tube comes into contact with the projection of the sounding body attached to the sounding body mounting portion so that the sounding portion is locked, the locked state of the sounding portion is released and the socket If the sound of tapping can be generated, insert the synthetic resin tube opening between the retaining ring in the socket and the rubber ring for sealing. Then, the sound of the sounding part hitting the mouth is generated, and the sound is used as a guide to synthesize the proper depth inside the mouth. The tip of the spigot fat pipe can confirm that it has been inserted.
[0023]
Like the pipe joint of the invention according to claim 8 of the present application, the sound generating mechanism is formed of an annular sounding body, and the sounding body has a portion projecting to the receiving opening opening side in a triangular cross-sectional shape. When the tip of the insertion port of the synthetic resin tube comes into contact with the protruding portion and is made to be able to generate sound, a synthetic ring is formed between the retaining ring and the sealing rubber ring in the receiving port. As the insertion of the resin tube is inserted, the protruding part of the sounding body is pushed by the tip, and a sound is generated which crushes the protruding part. It can be confirmed that the tip of the insertion opening of the synthetic resin tube has been inserted to a deep inside.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view showing an example of the pipe joint of the present invention.
As shown in FIG. 1, the pipe joint 1 includes a pipe joint body 11, an outer cylinder 12 connected to the pipe joint body 11, a cap nut 13 connected to a distal end of the outer cylinder 12, A socket surrounded by an outer cylinder 12 and an inner cylinder 14 extending inside the cap nut 13 from the joint body 11 is provided.
[0025]
The pipe joint body 11 is made of a metal material such as lead-free bronze or gunmetal, and has a locking concave portion into which the locking convex portion 123 at the other end of the outer cylindrical portion 12 is fitted along the circumferential direction on the outer peripheral surface at one end. 111 is provided, a ridge 112 is provided along the circumferential direction on the outer periphery of the central portion, and an insertion opening 113 is provided at the other end.
[0026]
The outer cylindrical portion 12 is made of a transparent resin such as transparent polyphenylene sulfide, and has a locking concave portion 121 with which a locking convex portion 132 at a base end portion of the cap nut 13 is fitted along an outer peripheral surface of a distal end portion along a circumferential direction. A ridge 122 is provided on the outer periphery of the central portion along the circumferential direction, and a locking convex portion 123 that fits into the locking concave portion 111 of the pipe joint body 11 along the circumferential direction on the inner peripheral surface of the base end portion. Is provided. A notch 124 is provided on the inner peripheral surface of the distal end portion of the outer cylindrical portion 12 along the circumferential direction for attaching a retaining link 15 described below.
[0027]
The cap nut 13 is made of a metal material such as gunmetal, and has a pipe insertion port 131 for inserting an insertion port of a synthetic resin pipe to be connected. The outer cylinder portion 12 is formed on the inner peripheral surface of the base end along the circumferential direction. Is provided with a locking projection 132 that fits into the locking concave portion 121 of the main body. The cap nut 13 is provided with an inclined surface 133 whose diameter is gradually reduced toward the opening end side along the circumferential direction on the inner peripheral surface (the surface of the tube insertion port 131) at the distal end, and from the portion where the inclined surface 133 is provided. The base end side is a step 134.
[0028]
The inner cylindrical portion 14 is made of a transparent resin such as transparent polyphenylene sulfide, and extends at one end of the pipe joint body 11 so as to extend inside the outer cylindrical portion 12 and the cap nut 13. A rubber ring mounting groove 141 is provided along the circumferential direction, and a sound generator dropping groove 142 is provided along the circumferential direction on the outer peripheral surface of the base end portion. As shown in FIG. 4, the inner cylinder portion 14 is formed at an angle of about 120 ° along the circumferential direction on the outer peripheral surface of the portion adjacent to the portion provided with the sound-generating body recess groove 142 on the side of the receiving port opening side. The sounding body temporary attachment groove 143 is provided so as to open toward the outer peripheral direction.
[0029]
The retaining ring 15 is made of a metal material such as gunmetal. As shown in FIG. 3, an inclined surface 151 corresponding to the inclined surface 133 of the cap nut 13 is provided on the outer peripheral surface along the circumferential direction. Is provided with a blade 152 that cuts into the outer periphery of the insertion opening of the synthetic resin tube inserted into the receiving opening. The retaining ring 15 has a slit portion 153 along the axial direction so that the diameter can be increased or reduced.
[0030]
Reference numeral 17 denotes a sounding body, which is made of a metal material such as spring steel. As shown in FIGS. 4 and 5, the sounding body 17 has a partially cut annular shape and has a fan-shaped cross section. As shown in FIG. 4A, the sounding body 17 is mounted in the sounding body temporary attachment groove 143 of the inner cylindrical portion 14 before the insertion of the synthetic resin tube is inserted into the receptacle, and FIG. As shown in the figure, after the insertion port P1 of the synthetic resin pipe P is inserted into the receiving port, it is pushed by the tip of the insertion port P1 of the synthetic resin pipe P so as to be dropped into the sounding body drop groove 142. Used.
[0031]
As shown in FIG. 1, the sounding body 17 is temporarily attached to the sounding body temporary attachment groove 143 of the inner cylindrical portion 14, and the sealing ring 16 is attached to the rubber ring attachment groove 141. The base end of the outer cylinder 12 is connected to one end so that the locking projection 123 is fitted to the locking recess 111, and the base of the cap nut 13 is connected to the distal end of the outer cylinder 12. The retaining ring 15 is included in both of them, and connected so that the locking projection 132 is fitted to the locking recess 121, and the pipe joint body 11, the outer cylinder 12, the cap nut 13, and the inner cylinder The pipe joint 1 having a socket surrounded by the portion 14 is formed.
[0032]
As shown in FIG. 2, this pipe joint 1 can be connected to the state in which it can be prevented from being pulled out by the retaining ring 16 by a one-touch operation of merely inserting the insertion port P1 of the synthetic resin pipe P to be connected into the receptacle. It has become.
That is, when the insertion opening P1 of the synthetic resin pipe P is inserted between the retaining ring 15 and the sealing rubber ring 16 in the receiving opening, the sounding body 17 temporarily attached to the sounding body temporary attachment groove 143 is synthesized. The resin tube P is pushed by the insertion opening P <b> 1 and is dropped into the sound-generating body dropping groove 142 while emitting sound. Using this sound as a guide, it can be confirmed that the front end of the insertion port P1 of the synthetic resin pipe P has been inserted to an appropriate depth inside the receptacle.
In addition, by making the outer cylindrical portion 12 made of a transparent resin, the sounding body 17 temporarily attached to the sounding body temporary attachment groove 143 is pushed by the insertion opening P1 of the synthetic resin pipe P, and the sounding body dropping groove 142 is formed. Since the state of being dropped into can be visually checked from the outside, visual confirmation can be used together.
At this time, the sealing rubber ring 16 is pressed against the inner peripheral surface of the synthetic resin tube P, so that the sealing property is ensured.
[0033]
Thereafter, when the synthetic resin pipe P is pulled in the pulling-out direction, the retaining ring 15 is reduced in diameter by the inclined surface 151 sliding on the inclined surface 133 of the cap nut 13, and the blade portion 152 of the synthetic resin pipe P is The synthetic resin pipe P bites into the outer peripheral surface and is prevented from falling out of the socket of the pipe joint 1.
Further, as shown in FIG. 4 (b), since the sounding body 17 has a fan-shaped cross section, the corner portion thereof is engaged with the inner peripheral surface of the synthetic resin pipe P, which is also It acts to further prevent the fitting from coming out of the socket of the pipe joint 1.
[0034]
FIG. 6 is a sectional view showing another example of the pipe joint of the present invention.
As shown in FIG. 6, the pipe joint 2 includes a pipe joint body 21, an outer cylinder 22 connected to the pipe joint body 21, a cap nut 23 connected to a distal end of the outer cylinder 22, A socket surrounded by an outer cylinder 22 and an inner cylinder 24 extending inside the cap nut 23 from the joint body 21 is provided.
[0035]
The pipe joint body 21, the cap nut 23, and the sounding body 27 have the same structure as the outer cylinder 21 described with reference to FIG. The same structural parts are denoted by the corresponding drawing numbers in the drawings, and detailed description thereof is omitted.
[0036]
The outer cylinder portion 22 is provided with a sound-generating body drop groove 242 and a sound-generating body drop groove 242 at a position slightly closer to the center than a portion where the locking projection 223 on the inner peripheral surface at the base end is provided. The structure of the outer cylinder portion 21 described with reference to FIG. 1 and the like is the same as the structure of the outer cylinder portion 21 described above with reference to FIG. is there. The same structural parts are denoted by the corresponding drawing numbers in the drawings, and detailed description thereof is omitted.
[0037]
The inner cylinder portion 24 has the same structure as the outer cylinder portion 21 described with reference to FIG. 1 and the like, except that the inner cylinder portion 24 does not have portions corresponding to the sounding body drop-in groove 142 and the sounding body temporary attachment groove 143. The same structural parts are denoted by the corresponding drawing numbers in the drawings, and detailed description thereof is omitted.
[0038]
As shown in FIG. 6, the pipe joint 1 can be connected to the state in which it can be prevented from being pulled out by the retaining ring 26 by a one-touch operation of merely inserting the insertion port P1 of the synthetic resin pipe P to be connected into the receptacle. It has become.
That is, when the insertion opening P1 of the synthetic resin tube P is inserted between the retaining ring 25 and the sealing rubber ring 26 in the receiving opening, the sounding body 27 temporarily attached to the sounding body temporary attachment groove 243 is synthesized. The resin tube P is pushed by the insertion opening P1 and is dropped into the sounding body dropping groove 242 while emitting sound. Using this sound as a guide, it can be confirmed that the front end of the insertion port P1 of the synthetic resin pipe P has been inserted to an appropriate depth inside the receptacle.
Further, by forming the outer cylindrical portion 22 of a transparent resin, the sounding body 27 temporarily attached to the sounding body temporary attachment groove 243 is pushed by the insertion port P1 of the synthetic resin pipe P, and the sounding body dropping groove 242 is formed. Since the state of being dropped into can be visually checked from the outside, visual confirmation can be used together.
At this time, the sealing rubber ring 26 is pressed against the inner peripheral surface of the synthetic resin pipe P, so that the sealing property is ensured.
[0039]
After that, when the synthetic resin pipe P is pulled in the pulling-out direction, the retaining ring 25 is reduced in diameter by the inclined surface 251 sliding on the inclined surface 233 of the cap nut 23, and the blade portion 252 of the synthetic resin pipe P is pulled out. The synthetic resin pipe P bites into the outer peripheral surface and is prevented from falling out of the socket of the pipe joint 2.
[0040]
FIG. 7 is a sectional view showing still another example of the pipe joint of the present invention.
As shown in FIG. 7, the pipe joint 3 includes a pipe joint body 31, a cap nut 32 connected to the pipe joint body 31, and an inner cylindrical portion 33 extending from the pipe joint body 31 to the inside of the cap nut 32. It has an enclosed socket.
[0041]
The pipe joint body 31 is made of a metal material such as lead-free bronze or gunmetal, and has a locking recess 311 in which the locking projection 323 at the other end of the cap nut 32 is fitted to the outer peripheral surface of one end along the circumferential direction. Is provided, a ridge 312 is provided along the circumferential direction on the outer periphery of the central portion, and an insertion opening 313 is provided at the other end.
[0042]
The cap nut 32 is made of a metal material such as a gunmetal, has a pipe insertion port 321 for inserting an insertion port of a synthetic resin pipe to be connected, and is provided on the inner peripheral surface of the base end along the circumferential direction along the circumferential direction. Locking concave portion 111 is provided. The cap nut 32 is provided with an inclined surface 323 whose diameter gradually decreases toward the opening end along the circumferential direction on the inner peripheral surface (the surface of the tube insertion port 131) at the center.
324 is an insertion confirmation window.
[0043]
The inner cylinder portion 33 is made of a metal material such as a gunmetal and is provided so as to extend from one end of the pipe joint body 31 to the inside of the cap nut 32. A mounting groove 331 is provided.
The retaining ring 34 is made of a metal material such as gunmetal, is provided with an inclined surface 341 corresponding to the inclined surface 323 of the cap nut 32 on the outer peripheral surface along the circumferential direction, and is inserted into the receptacle on the inner peripheral surface. A blade portion 342 that cuts into the outer periphery is provided at the insertion opening of the resin tube. The retaining ring 34 has a slit portion along the axial direction so that the diameter can be increased or reduced.
[0044]
Reference numeral 36 denotes a sounding body, as shown in FIG. 8, which is formed of a thin annular body, and has a cross-sectional shape on one side which gradually becomes closer to the receiving opening as it goes inward in the axial direction. It is formed so as to bulge, and when pressed in the bulging direction, has a structure in which the sound is inverted while emitting sound to the other side, which is the back side of the receptacle.
On one end surface of the joint main body 31 which is located at the back of the socket, a sounding body support portion 314 for supporting the outer peripheral portion of the sounding body 36 is provided, and on the inner peripheral side thereof, the sounding body support portion 314 is provided at a position deeper than the sounding body support portion 314. A space 315 that is depressed in the direction is provided so that the sounding body 37 can be inverted from one side to the other side.
[0045]
Then, as shown in FIG. 7, the sounding body 36 is mounted on the sounding body support portion 314 of the joint body 31, and the sealing rubber ring 35 is mounted on the rubber ring mounting groove 331, and at one end of the joint body 31, The base end of the cap nut 32 containing the retaining ring 34 is connected so that the locking convex part 322 is fitted into the locking concave part 311, and the pipe joint body 31, the cap nut 32, and the inner cylindrical part 33 are connected. A pipe joint 3 having a socket surrounded by is formed.
[0046]
The pipe joint 3 can be connected in a state where it can be prevented from being pulled out by the retaining ring 34 by a one-touch operation only by inserting an insertion opening (not shown) of a synthetic resin tube to be connected into the receiving opening.
That is, as the insertion of the synthetic resin tube is inserted between the retaining ring 34 and the sealing rubber ring 35 in the receiving opening, the sounding body 36 is pressed by the tip of the insertion of the synthetic resin tube to generate sound. It is inverted into the space 315 while emitting. Using this sound as a guide, it can be confirmed that the front end of the synthetic resin tube opening has been inserted to an appropriate depth inside the receptacle.
In addition, since the insertion confirmation window 324 allows the outside of the synthetic resin tube to be visually confirmed from the outside as having passed, the visual confirmation can be used together. At this time, the sealing rubber ring 34 is pressed against the inner periphery of the synthetic resin tube, and the sealing property is ensured.
[0047]
Thereafter, when the synthetic resin pipe is pulled in the pulling-out direction, the retaining ring 34 is reduced in diameter by sliding the inclined surface 341 against the inclined surface 323 of the cap nut 32, and the blade portion 342 is formed on the outer peripheral surface of the synthetic resin pipe. And the synthetic resin pipe is prevented from falling out of the socket of the pipe joint 3.
[0048]
As shown in FIGS. 9 to 11, the sounding body is formed of an annular plate, and its cross-sectional shape gradually bulges toward one side, which is the opening side of the socket, toward the center with respect to the axial direction. Alternatively, sounding bodies 37 to 39 may be used which have a structure in which when pressed in the bulging direction, the sounding bodies 37 to 39 are inverted while emitting sound to the other side, which is the back side of the receptacle.
[0049]
FIG. 12 is a sectional view showing still another example of the pipe joint of the present invention.
As shown in FIG. 12, the pipe joint 4 includes a pipe joint body 41, a cap nut 42 connected to the pipe joint body 41, and an inner cylindrical portion 43 extending from the pipe joint body 41 to the inside of the cap nut 42. It has an enclosed socket.
[0050]
The cap nut 42, the inner cylinder 43, and the retaining ring 44 have the same structure as the cap nut 32, the inner cylinder 33, and the retaining ring 34 described with reference to FIG. 7, respectively. Therefore, the corresponding drawing numbers are attached in the drawings, and the detailed description thereof is omitted.
[0051]
The pipe joint body 41 of the pipe joint body 31 described with reference to FIG. 7 except that a sounding body mounting portion 414 having a sounding portion locking portion 414a is provided at one end portion located at the back of the socket. Same as structure.
The sounding body mounting portion 414 is configured to protrude abutting portions 414b upright on the inner side of the receptacle, concave grooves 414c provided on the inner peripheral side along the circumferential direction, and extend toward the inner peripheral side toward the inner side of the receptacle on the outer peripheral side. And a sound-generating portion locking portion 414a.
The same structural parts as those in FIG. 7 are denoted by the corresponding drawing numbers in the drawing, and detailed description thereof is omitted.
[0052]
Reference numeral 46 denotes a sounding body, which is formed of a thin annular plate as shown in FIG. 13, and has wide portions 46A and narrow portions 46B provided alternately in the circumferential direction. Is provided with a projection 461 protruding on one side, which is the receiving opening side, a fulcrum 462 on the other side of the central portion, and a sound generator 463 bent on the other side on the outer peripheral edge, The locking portion 464 is provided on the inner peripheral side of the narrow portion 46B.
[0053]
As shown in FIG. 13 (a), the sounding body 46 has a fulcrum portion 462 at the butting portion 414b of the sounding body mounting portion 414, and a locking portion 464 is locked in the concave groove 414c. The sounding portion 463 is locked by the sounding portion locking portion 414a, and the protrusion 461 is mounted so as to protrude into a portion of the receiving port where the insertion opening of the synthetic resin pipe to be connected is inserted.
[0054]
Then, as shown in FIG. 14, when the insertion port P1 of the synthetic resin pipe P to be connected into the receptacle is inserted, the tip of the insertion port P1 of the synthetic resin pipe P presses the protruding portion 461. The sounding body 46 rotates about the fulcrum portion 462, the locking portion 464 is disengaged from the concave groove 414c, and the sounding portion 463 is disengaged from the sounding portion locking portion 414a. It is used in such a way that sound is generated by being hit on the peripheral surface.
[0055]
Then, as shown in FIG. 12, the sounding body 46 is mounted on the sounding body mounting portion 414 of the pipe joint body 41, and the rubber ring 45 for sealing is mounted on the rubber ring mounting groove 431, and one end of the pipe joint body 41. The base end of the cap nut 42 enclosing the retaining ring 44 is connected so that the locking projection 422 is fitted into the locking recess 411, and the pipe joint body 41, the cap nut 42 and the inner cylinder are connected to each other. A pipe joint 4 having a socket surrounded by the portion 43 is formed.
[0056]
The pipe joint 4 can be connected with the retaining ring 44 in a state where it can be prevented from being pulled out by a one-touch operation only by inserting an insertion opening of a synthetic resin tube to be connected (not shown) into the receiving opening.
That is, when the insertion opening of the synthetic resin pipe is inserted between the retaining ring 44 and the sealing rubber ring 45 in the receiving port, as shown in FIG. Presses the protruding portion 461 of the sounding body 46, whereby the sounding body 46 rotates about the fulcrum 462, the locking portion 464 is disengaged from the concave groove 414c, and the sounding portion 463 is locked by the sounding portion locking. It is separated from the portion 414a and struck against the inner peripheral surface of the base end portion of the cap nut 42 to generate sound. Using this sound as a guide, it can be confirmed that the pipe end of the insertion port P1 of the synthetic resin pipe P has been inserted to an appropriate depth inside the receptacle.
In addition, since the insertion confirmation window 424 allows the outside of the end of the synthetic resin tube to be visually checked from the outside, visual confirmation can be used together.
At this time, the sealing rubber ring 44 is pressed against the inner periphery of the synthetic resin tube, and the sealing property is ensured.
[0057]
Thereafter, when the synthetic resin pipe is pulled in the pulling-out direction, the retaining ring 44 is reduced in diameter by the inclined surface 441 sliding on the inclined surface 423 of the cap nut 42, and the blade portion 442 of the outer peripheral surface of the synthetic resin pipe is removed. And the synthetic resin pipe is prevented from falling out of the socket of the pipe joint 4.
[0058]
FIG. 15 is a sectional view showing still another example of the pipe joint of the present invention.
As shown in FIG. 15, the pipe joint 5 includes a pipe joint body 51, a cap nut 52 connected to the pipe joint body 51, and an inner cylindrical portion 53 extending from the pipe joint body 51 to the inside of the cap nut 52. It has an enclosed socket.
[0059]
The cap nut 52, the inner cylinder 53 and the retaining ring 54 have the same structure as the cap nut 52, the inner cylinder 33 and the retaining ring 34 described with reference to FIG. 7, respectively. Therefore, the corresponding drawing numbers are attached in the drawings, and the detailed description thereof is omitted.
[0060]
The pipe joint body 51 has the same structure as that of the pipe joint body 31 described with reference to FIG. 7, except that a sounding body mounting portion 514 is provided on one end surface which is a deep portion of the socket. The same structural parts are denoted by the corresponding drawing numbers in the drawings, and detailed description thereof is omitted.
[0061]
Reference numeral 56 denotes a sounding body, which is formed of an annular body and is divided into 16 in the circumferential direction, as shown in FIG. 16, and has a triangular portion 56A having a triangular cross section as shown in FIG. A trapezoidal portion 56B having a trapezoidal cross section as shown is arranged every other portion. Then, when a section 56A having a triangular cross section is inserted into the opening of the synthetic resin pipe to be connected, the end of the opening of the synthetic resin pipe hits, and a section 56B having a trapezoidal section shape while emitting sound. It is structured to be crushed into the same shape as.
[0062]
As shown in FIG. 15, the sounding body 56 is mounted on the sounding body mounting portion 514 of the pipe joint body 51, and the sealing rubber ring 55 is mounted on the rubber ring mounting groove 531. The base end of the cap nut 52 enclosing the retaining ring 54 is connected so that the locking projection 522 is fitted into the locking recess 511, and the pipe joint body 51, the cap nut 52 and the inner cylinder are connected to each other. A pipe joint 5 having a socket surrounded by the portion 53 is formed.
[0063]
The pipe joint 5 can be connected in a state in which it can be prevented from being pulled out by the retaining ring 54 by a one-touch operation only by inserting an insertion opening (not shown) of a synthetic resin tube to be connected into the receiving opening.
That is, when the insertion of the synthetic resin pipe is inserted between the retaining ring 54 and the sealing rubber ring 55 in the receptacle, the insertion of the synthetic resin pipe to be connected to the portion 56A having a triangular cross section is performed. , And is crushed into the same shape as the trapezoidal portion 562 while emitting sound. Using this sound as a guide, it can be confirmed that the end of the synthetic resin tube insertion end has been inserted to an appropriate depth inside the receptacle.
In addition, since the insertion confirmation window 524 allows the outside of the synthetic resin tube to be visually confirmed from the outside as having passed, the visual confirmation can be used together.
At this time, the sealing rubber ring 54 is pressed against the inner peripheral surface of the synthetic resin tube, so that the sealing property is ensured.
[0064]
Thereafter, when the synthetic resin pipe is pulled in the pulling-out direction, the retaining ring 54 is reduced in diameter by the inclined surface 541 sliding on the inclined surface 523 of the cap nut 52, and the blade portion 542 is formed on the outer peripheral surface of the synthetic resin pipe. And the synthetic resin pipe is prevented from falling out of the socket of the pipe joint 5.
[0065]
【The invention's effect】
Since the pipe joint of the present invention is configured as described above, even at a construction site where it is difficult to see due to obstacles in a dark place or around the end, the end of the synthetic resin pipe can be extended to an appropriate depth inside the socket. The connection work can be reliably performed while confirming that the part has been inserted by using the sound of the sound generating mechanism as a guide, and there is no occurrence of construction failure leading to water leakage.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating an example of the pipe joint of the present invention.
FIG. 2 is a cross-sectional view for explaining a process of connecting an opening of a synthetic resin pipe to be connected to a socket of the pipe joint shown in FIG.
FIG. 3 is a perspective view showing an example of a retaining ring used in the pipe joint shown in FIG.
FIGS. 4A and 4B are cross-sectional views illustrating a process of connecting an insertion port of a synthetic resin pipe to be connected to a socket of the pipe joint shown in FIG. 1; FIG. 4A is a cross-sectional view illustrating a state before connection; () Is a sectional view showing a state during connection.
FIG. 5 is a plan view showing an example of a sounding body used in the pipe joint shown in FIG.
FIG. 6 is a sectional view illustrating another example of the pipe joint of the present invention.
FIG. 7 is a partial sectional view illustrating still another example of the pipe joint of the present invention.
8 is a plan view illustrating an example of a sounding body used in the pipe joint shown in FIG.
9 is a plan view illustrating another example of the sounding body used in the pipe joint shown in FIG.
FIG. 10 is a plan view illustrating still another example of the sounding body used in the pipe joint shown in FIG. 7;
FIG. 11 is a plan view illustrating still another example of the sounding body used in the pipe joint shown in FIG. 7;
FIG. 12 is a partial sectional view illustrating still another example of the pipe joint of the present invention.
13A and 13B are explanatory views of an example of a sounding body used in the pipe joint shown in FIG. 12, wherein FIG. 13A is a cross-sectional view taken along line II in FIG. 12B, and FIG. 13B is a plan view thereof. .
FIG. 14 is a plan view illustrating the operation of the sounding body used in the pipe joint shown in FIG.
FIG. 15 is a partial sectional view illustrating still another example of the pipe joint of the present invention.
16A and 16B are explanatory views of an example of a sounding body used for the pipe joint shown in FIG. 15, wherein FIG. 16A is a plan view, FIG. 16B is a cross-sectional view taken along the line II-II, and FIG. It is sectional drawing which follows the III-III line.
FIG. 17 is a partial sectional view showing an example of a conventional pipe joint.
[Explanation of symbols]
1,2,3,4,5 pipe fittings
2 Synthetic resin pipe
11, 21, 31, 41, 51 Fitting body
12,22 outer cylinder
13,23,32,42,52 Cap nut
14, 24, 33, 43, 53 Inner cylinder
15, 25, 34, 44, 54 retaining ring
16, 26, 35, 45, 55 Rubber ring for sealing
17,27,36,46,56 Pronunciation

Claims

A pipe joint body, an outer cylinder connected to the pipe joint main body, a cap nut connected to a distal end of the outer pipe section, and extending from the pipe joint main body inside the outer cylinder and the cap nut. Equipped with a socket surrounded by an inner cylinder part, a retaining ring and a rubber ring for sealing are mounted in the socket, and one-touch operation just to insert a synthetic resin pipe opening to be connected in the socket A pipe joint that can be connected to the pull-out preventing state by the retaining ring by the operation described above, wherein the synthetic resin is attached to a portion deeper than a mounting position of the retaining ring and the sealing rubber ring in the receiving port. A pipe joint comprising a sound generating mechanism that generates a sound when the tip of an insertion opening of a resin tube comes into contact and can confirm the insertion.

The pipe joint according to claim 1, wherein the outer cylindrical portion is made of a transparent resin.

The sounding mechanism is provided with a sounding body dropping groove on an outer peripheral surface of the inner cylinder portion at a portion deeper than the rubber ring mounting groove and the retaining ring mounting position of the inner cylinder portion, The sounding body is temporarily attached to an outer peripheral surface of the inner cylindrical portion between a groove and a mounting position of the retaining ring and the sealing rubber ring. Pipe fittings.

4. The pipe joint according to claim 3, wherein the sounding body has a partially cut annular shape and has a fan-shaped cross section. 5.

A pipe joint body, a cap nut connected to the pipe joint body, and a socket surrounded by an inner cylinder portion extending from the pipe joint body to the inside of the cap nut, and a retaining ring in the socket. A pipe joint which is provided with a sealing rubber ring, and which can be connected to the state in which it can be prevented from being pulled out by the retaining ring by a one-touch operation of merely inserting an opening of a synthetic resin pipe to be connected into the socket. A sound is generated when the distal end of the insertion opening of the synthetic resin tube comes into contact with a portion of the receiving port, which is located on the inner side of the mounting position of the retaining ring and the sealing rubber ring, to confirm the insertion. A pipe joint characterized by being provided with a sound generation mechanism capable of performing the sound generation.

The sounding mechanism is formed of a ring-shaped sounding body, and the sounding body is formed so as to have a portion whose cross-sectional shape swells toward the receiving opening side, and the synthetic resin tube is inserted into the swelling portion. The pipe joint according to claim 5, wherein when the tip of the mouth comes into contact, the pipe joint is turned to the back side of the socket to generate a sound.

The sounding mechanism includes a sounding body mounting portion provided at a back portion of the receiving port and an annular sounding body mounted on the sounding body mounting portion, and the sounding body rotates around a radial center portion as a fulcrum. It is made freely, and a projection is provided on the inner periphery to protrude toward the receiving opening, and a sound generator is provided on the outer periphery, so that the sound generator is locked to the sound generator mounting part. When the tip of the insertion opening of the synthetic resin tube comes into contact with the protruding portion of the attached sounding body, the sounding portion is released from the locked state and a sound of hitting the socket can be generated. The pipe joint according to claim 5.

The sounding mechanism comprises a ring-shaped sounding body, and the sounding body has a portion having a triangular cross-sectional shape and protruding toward the mouth opening side. 6. The pipe joint according to claim 5, wherein the pipe joint is configured to be able to generate a sound when crushed.