JP3559906B2

JP3559906B2 - Mixing faucet fittings

Info

Publication number: JP3559906B2
Application number: JP2001345806A
Authority: JP
Inventors: 謙一渡辺
Original assignee: 株式会社カクダイ
Priority date: 2001-11-12
Filing date: 2001-11-12
Publication date: 2004-09-02
Anticipated expiration: 2021-11-12
Also published as: JP2003147817A

Description

【０００１】
【発明の属する技術分野】
本発明は、壁の裏側等に配された給湯管および給水管の各末端に混合水栓を接続するのに用いられ、一般にクランクと呼ばれる、混合水栓接続用管継手に関する。
【０００２】
【従来の技術および発明が解決しようとする課題】
この種の管継手としては、一体成形されたクランク形管体の後端部に雄ねじ付き給湯または給水管接続口部が設けられ、同前端部に混合水栓接続口部が設けられてなるものが一般に知られている。
【０００３】
上記管継手を使って混合水栓を接続する場合、まず、管継手後端部の雄ねじにシールテープを巻いておいてから、同雄ねじを給湯管および給水管の各末端に設けられた雌ねじにねじ込む必要がある。
【０００４】
ところが、雄ねじのねじ込み作業が完了した時点で、混合水栓接続口部が混合水栓を接続するのに適した位置に来ていることは稀であって、混合水栓接続口部が上記所要位置に来るまで雄ねじのねじ込み作業を何度かやり直す必要があり、非常に手間が掛かっていた。
【０００５】
また、給水管および給湯管の配管状態によっては、これらの管の末端に設けられた雌ねじの前端が互いに前後方向にずれていることもあるが、上記管継手の場合、これら雌ねじ前端の位置ズレを吸収することができず、そのままでは混合水栓を正常に接続できない場合があった。
【０００６】
本発明の目的は、上記の問題点を一挙に解決できる施工性に優れた混合水栓接続用管継手を提供することにある。
【０００７】
【課題を解決するための手段および発明の効果】
本発明による第１の混合水栓接続用管継手は、前端開口が閉鎖され、後端側に雄ねじ付き給湯または給水管接続口部が設けられ、かつ周壁に湯または水導出孔があけられた水平筒状第１管継手部材と、湯または水導出孔を覆うように第１管継手部材に回動可能にかつ前後移動可能に嵌め被せられた回動筒部、回動筒部の周壁にあけられた湯または水通過孔の外周縁に外方突出状に設けられた外方突出筒部、および外方突出筒部の先端側に連なって前方に伸びた混合水栓接続口部よりなる第２管継手部材とを備え、第１管継手部材の湯または水導出孔と回動筒部の湯または水通過孔とを連通させるように、第１管継手部材の外周面および回動筒部の内周面のうち少なくとも一方に環状連通溝が設けられ、回動筒部の内周面と、第１管継手部材の外周面とに、回動筒部を後方に移動させた際に互いに嵌まり合って回動筒部の回動を阻止しうる一方、回動筒部を前方に移動させた際に互いに前後にずれて回動筒部の回動を許容しうる嵌合部が設けられているものである。
【０００８】
上記管継手にあっては、第２管継手部材の回動筒部を第１管継手部材に対して後方に移動させると、回動筒部と第１管継手部材の嵌合部どうしが互いに嵌まり合って、回動筒部が第１管継手部材に対して回動不能となる。一方、回動筒部を第１管継手部材に対して前方に移動させると、両者の嵌合部どうしが互いに前後にずれて、回動筒部が第１管継手部材に対して回動可能となる。
【０００９】
したがって、上記管継手を用いて混合水栓を給湯管および給水管に接続する場合、まず、管継手の回動筒部を後方に移動させて回動筒部と第１管継手部材の嵌合部どうしを嵌合させておいてから、第２管継手部材を持って第１管継手部材後端側の雄ねじを給湯管および給水管の各末端の雌ねじにねじ込む。そして、雄ねじのねじ込み作業が完了したら、管継手の回動筒部を前方に移動させて前記嵌合部どうしを外し、混合水栓接続口部が混合水栓を接続するのに適した位置に来るように回動筒部を回動させる。最後に、混合水栓接続口部を混合水栓本体の湯または水導入口に接続する。この際、給水管および給湯管各末端の雌ねじの位置が前後方向にずれている場合には、それに応じて一方または両方の管継手の回動筒部を前方または後方に移動させればよい。以上の通り、本発明による第１の混合水栓接続用管継手によれば、給湯管および給水管への混合水栓の接続作業を極めて容易にかつ確実に行うことができる。
【００１０】
本発明による第１の混合水栓接続用管継手において、両嵌合部は、これらの嵌合状態において、回動筒部が第１管継手部材に対して回動不能となるようなものであれば、特に限定されないが、例えば以下のような横断面を有するものとなされる。
即ち、両嵌合部が歯車形の横断面を有している場合がある。
また、両嵌合部が多角形の横断面を有している場合もある。
両嵌合部が欠円形の横断面を有している場合もある。
さらには、一方の嵌合部が少なくとも１つの嵌合凸部よりなり、他方の嵌合部が嵌合凸部に嵌合する少なくとも１つの嵌合凹部よりなる場合もある。この場合、嵌合凹部の数を嵌合凸部の数より多くしておいて、嵌合凸部と一部の嵌合凹部とを嵌合させるようにしてもよい。このようにすれば、嵌合部どうしを嵌合させるために、回動筒部を第１管継手部材に対して回動方向に位置合わせするのが容易となる。具体的には、例えば、回動筒部の内周面および第１管継手部材の外周面のうち一方に１つの嵌合凸部を設け、同他方に周方向に等間隔おきに２以上の嵌合凹部を設けてもよい。また、前記一方に対称位置にある２つの嵌合凸部を設け、前記他方に周方向に等間隔おきに４以上の偶数の嵌合凹部を設けてもよい。なお、両嵌合部は、互いにきつく嵌合されるようなものである必要はなく、むしろ、嵌合のし易さや磨耗の低減等を考慮すると、回動筒部が若干遊ぶ程度において、互いに緩く嵌合されるようなものであるのが好ましい。
【００１１】
また、回動筒部の内周面および第１管継手部材の外周面において、両嵌合部が設けられる位置は、回動筒部を後方に移動させた際に互いに嵌まり合い、回動筒部を前方に移動させた際に互いに前後にずれるような位置であれば特に限定はされない。具体的には、回動筒部について、これの内周面の後端部、長さ中間部、前端部のいずれに嵌合部が設けられてもよく、一方、第１管継手部材については、これの外周面における回動筒部前後移動区域の後端部または長さ中間部に嵌合部が設けられる。
【００１２】
次に、本発明による第２の混合水栓接続用管継手は、前端開口が閉鎖され、後端側に雄ねじ付き給湯または給水管接続口部が設けられ、かつ周壁に湯または水導出孔があけられた水平筒状第１管継手部材と、湯または水導出孔を覆うように第１管継手部材に回動可能にかつ前後移動可能に嵌め被せられた回動筒部、回動筒部の周壁にあけられた湯または水通過孔の外周縁に外方突出状に設けられた外方突出筒部、および外方突出筒部の先端側に連なって前方に伸びた混合水栓接続口部よりなる第２管継手部材とを備え、第１管継手部材の湯または水導出孔と回動筒部の湯または水通過孔とを連通させるように、第１管継手部材の外周面および回動筒部の内周面のうち少なくとも一方に環状連通溝が設けられ、回動筒部の内周面後端部および第１管継手部材の外周面における回動筒部前後移動区域の後端部のうちいずれか一方に、少なくとも１つの凸部が設けられるとともに、同他方に、凸部と係合して雄ねじ締付方向への回動筒部の回動を阻止する第１切欠部と、凸部と係合して雄ねじ緩み方向への回動筒部の回動を阻止する第２切欠部とが設けられ、第１切欠部には、凸部と係合した状態から回動筒部を雄ねじ緩み方向に回動させた際に凸部を第１切欠部の外に送り出す傾斜状第１案内面が設けられているものである。
【００１３】
本発明による第２の混合水栓接続用管継手において、さらに、第２切欠部に、凸部と係合した状態から回動筒部を雄ねじ締付方向に回動させた際に凸部を第２切欠部の外に送り出す傾斜状第２案内面が設けられていてもよい。
【００１４】
上記管継手にあっては、第２管継手部材の回動筒部を第１管継手部材に対して後方に移動させて、凸部を第１切欠部に嵌め入れると、凸部と第１切欠部との係合によって、回動筒部が第１管継手部材に対して雄ねじ締付方向に回動不能となる。なお、第２切欠部に第２案内面が設けられている場合には、凸部を誤って第２切欠部に嵌め入れたとしても、回動筒部を雄ねじ締付方向に回動させると、第２案内面によって凸部が外に送り出されるため、誤操作のおそれがない。一方、この状態から回動筒部を第１管継手部材に対して雄ねじ緩み方向に回動させると、凸部が第１案内面によって第１切欠部の外に送り出され、回動筒部が第１管継手部材に対して回動可能となる。
また、第２管継手部材の回動筒部を第１管継手部材に対して後方に移動させて、凸部を第２切欠部に嵌め入れると、凸部と第２切欠部との係合によって、回動筒部が第１管継手部材に対して雄ねじ緩み方向に回動不能となる。凸部を誤って第１切欠部に嵌め入れた場合でも、回動筒部を雄ねじ緩み方向に回動させると、第１案内面によって凸部が外に送り出されるため、誤操作のおそれがない。一方、この状態から回動筒部を第１管継手部材に対して前方に移動させると、凸部が第２切欠部から外れて、回動筒部が第１管継手部材に対して回動可能となる。また、第２切欠部に第２案内面が設けられている場合には、回動筒部を第１管継手部材に対して雄ねじ締付方向に回動させると、凸部が第２案内面によって第２切欠部の外に送り出され、回動筒部が第１管継手部材に対して回動可能となる。
【００１５】
上記管継手を用いて混合水栓を給湯管および給水管に接続する場合、例えば、次のように作業を行うことができる。即ち、まず、管継手における第２管継手部材の回動筒部を後方に移動させて、凸部を第１切欠部に嵌め入れる。こうしておいて、第１管継手部材後端側の雄ねじを給湯管および給水管の各末端の雌ねじに合わせ、第２管継手部材の回動筒部を雄ねじ締付方向に回動させる。すると、凸部と第１切欠部とが係合して、回動筒部が第１管継手部材に対して雄ねじ締付方向に回動不能な状態、即ち、空回りしない状態となるので、雄ねじを雌ねじにねじ込むことができる。雄ねじのねじ込み作業が完了したら、回動筒部を雄ねじ緩み方向に回動させる。すると、凸部が第１案内面によって第１切欠部の外、即ち前方に送り出され、回動筒部が第１管継手部材に対して回動可能となる。このように、上記管継手の場合、回動筒部を前方に移動させて第１管継手部材に対して回動可能な状態にする際に、誤って雄ねじを緩めてしまうおそれがない。そして、混合水栓接続口部が混合水栓を接続するのに適した位置に来るように回動筒部を回動させる。最後に、混合水栓接続口部を混合水栓の水栓本体における湯または水導入口に接続する。この際、給水管および給湯管各末端の雌ねじの位置が前後方向にずれている場合には、それに応じて一方または両方の管継手の回動筒部を前方または後方に移動させればよい。
また、交換や接続作業のやり直し等に伴って、上記管継手を給湯管・給水管から取り外す必要が生じた場合は、例えば、次のようにしてその取外し作業を行うことができる。即ち、まず、第２管継手部材の回動筒部を後方に移動させて、凸部を第２係合部に嵌め入れる。そして、第２管継手部材の回動筒部を雄ねじ緩み方向に回動させると、凸部と第２切欠部とが係合して、回動筒部が第１管継手部材に対して雄ねじ緩み方向に回動不能な状態、即ち空回りしない状態となるので、雄ねじを雌ねじから外すことができる。
以上の通り、本発明による第２の混合水栓接続用管継手によれば、給湯管および給水管への混合水栓の接続作業を極めて容易にかつ確実に行うことができ、また、交換や接続作業のやり直し等に伴う給湯管・給水管からの取外し作業も簡単かつ確実に行うことができる。
【００１６】
本発明による第１および第２の混合水栓接続用管継手において、回動筒部の前後移動可能距離が２〜１０ｍｍであるのが好ましい。回動筒部の前後移動可能距離が２ｍｍ未満であると、給水管および給湯管の末端に設けられた雌ねじ前端の位置ズレを吸収することが難しくなる。一方、回動筒部の前後移動可能距離が１０ｍｍを越えると、第１管継手部材が長くなりすぎて前方に出っ張り、邪魔になるおそれがある。
【００１７】
【発明の実施の形態】
図１〜５は、本発明の第１の実施形態を示すものである。
【００１８】
図１において、浴室等の壁（Ｗ）の裏側に垂直に配された給湯管（図示略）および給水管（図示略）の各末端に、本発明による混合水栓接続用管継手（１）を介して、混合水栓（Ｖ）が接続されている。詳しい図示は省略したが、給湯管および給水管の各末端には、前方に開口した雌ねじが設けられており、これらの雌ねじが壁（Ｗ）にあけられた孔を介して壁（Ｗ）の表側に露出させられている。図１の混合水栓（Ｖ）は、シングルレバー式のものであって、水栓本体（Ｖ１）の後面に後方突出状の雄ねじ付き湯導入口部（図示略）および雄ねじ付き水導入口部（図示略）が左右に並んで設けられている。
【００１９】
図２〜５に示すように、混合水栓接続用管継手（１）は、第１管継手部材（２）と第２管継手部材（３）とを備えている。第１管継手部材（２）は、前端開口が閉鎖され、後端側に雄ねじ（２１ａ）付き給湯または給水管接続口部（２１）が設けられ、かつ周壁に複数の湯または水導出孔（２２）が円周方向に間隔をおいてあけられている水平筒状のものである。第２管継手部材（３）は、湯または水導出孔（２２）を覆うように第１管継手部材（２）に回動可能にかつ前後移動可能に嵌め被せられた回動筒部（３１）、回動筒部（３１）の周壁にあけられた湯または水通過孔（３１１）の外周縁に外方突出状に設けられた外方突出筒部（３２）、および外方突出筒部（３２）の先端側に連なって前方に伸びた混合水栓接続口部（３３）よりなる。第１管継手部材（２）の湯または水導出孔（２２）と回動筒部（３１）の湯または水通過孔（３１１）とを連通させるように、第１管継手部材（２）の内周面に環状連通溝（２３）が設けられている。回動筒部（３１）の内周面後端部と、第１管継手部材（２）の外周面における回動筒部前後移動区域（２Ｘ）の後端部とに、回動筒部（３１）を後方に移動させた際に互いに嵌まり合って回動筒部（３１）の回動を阻止しうる一方、回動筒部（３１）を前方に移動させた際に互いに前後にずれて回動筒部（３１）の回動を許容しうる嵌合部（３１２）（２４）が設けられている。両嵌合部（３１２）（２４）は、図４に示すように、歯車形の横断面を有している。回動筒部（３１）の前後移動可能距離（Ｓ）は、約１０ｍｍである（図３および５参照）。
【００２０】
第１管継手部材（２）の雄ねじ（２１ａ）付き給湯または給水管接続口部（２１）は、該部材（２）の全長のほぼ３分の１程度の長さを有している。また、雄ねじ（２１ａ）には、壁（Ｗ）にあけられた孔を覆い隠すための環状カバー（４）が嵌められている。
【００２１】
第１管継手部材（２）の外周面前端部には、回動筒部（３１）が前方に抜けるのを阻止する環状フランジ部（２５）が設けられている。また、第１管継手部材（２）外周面における雄ねじ（２１ａ）の前隣部分に環状溝が形成され、該溝に回動筒部（３１）が後方に抜けるのを阻止するＣ形ストッパ（５）が嵌め込まれている。第１管継手部材（２）の外周面において、これらフランジ部（２５）とストッパ（５）との間の部分が、回動筒部前後移動区域（２Ｘ）となされている。
【００２２】
第１管継手部材（２）外周面における回動筒部前後移動区域（２Ｘ）の中間に前後２つのパッキン収容溝が所定間隔をおいて形成され、これらの溝にＯリングよりなるパッキン（６）が回動筒部（３１）内周面に密接可能に嵌め込まれている。これらパッキン（６）と第１管継手部材（２）外周面との摩擦抵抗により、第２管継手部材（３）はそれ自体の重量によって勝手に回動しないようになっている。前記環状連通溝（２３）は、前後２つのパッキン（６）どうしの間に形成されている。湯または水導出孔（２２）は、環状連通溝（２３）の底に開口している。なお、湯または水導出孔（２２）は、少なくとも１つあればよい。
【００２３】
第１管継手部材（２）内周面における湯または水導出孔（２２）の後隣部分に、環状内方突出部（２５）が設けられている。第１管継手部材（２）の前端開口は、該部材（２）の雌ねじ付き前端部内にねじ込まれた雄ねじ付き閉鎖部材（７）によって、閉鎖されている。閉鎖部材（７）の軸心部に雌ねじ付き貫通孔があけられ、該孔に雄ねじ付き棒状弁体操作部材（８１）がねじ込まれている。ゴム等の弾性材料よりなるリング状弁体（８２）が、弁体操作部材（８１）の後端にビス止めされ、第１管継手部材（２）の内方突出部（２５）前面によって構成される弁座（８３）に対して当接・離間可能となされている。上記の弁体操作部材（８１）、弁体（８２）および弁座（８３）によって、止水弁（８）が構成されている。なお、止水弁（８）は必ずしも第１管継手部材（２）に備えられていなくてよい。
【００２４】
第２管継手部材（３）において、回動筒部（３１）の湯または水通過孔（３１１）は、該筒部（３１）が第１管継手部材（２）外周面における回動筒部前後移動区域（２Ｘ）のいずれに位置している場合でも、環状連通溝（２３）を介して第１管継手部材（２）の湯または水導出孔（２２）と連通するようになっている。
【００２５】
回動筒部（３１）の嵌合部（３１２）は、図４に示すように、外周に２等辺三角形の歯が規則的に多数設けられた外歯車形の横断面を有している。一方、これに嵌合する第１管継手部材（２）の嵌合部（２４）は、同じく図４に示すように、内周に２等辺三角形の歯が規則的に多数設けられた内歯車形の横断面を有している。この実施形態のように、両嵌合部（３１２）（２４）が歯車形の横断面を有するいわゆるセレーションによって構成されていれば、両者の嵌合に際して円周方向の位置合わせが容易である。
【００２６】
外方突出筒部（３２）の先端は、図３および５の上方に開口している。この先端開口は、外方突出筒部（３２）の雌ねじ付き先端部内にねじ込まれた雄ねじ付き閉鎖部材（９）によって、閉鎖されている。閉鎖部材（９）の内端側には、凹陥部（９１）が設けられている。外方突出筒部（３２）内の先端側は、基端側に比べて径の大きいものとなされており、両者の境界部分には、環状内方突出部（３２１）が設けられている。そして、外方突出筒部（３２）内の先端側に、筒状のストレーナ（１０）が、その一端部が凹陥部（９１）に嵌まり込むとともに他端が内方突出部（３２１）に当接した状態で、固定されている。
【００２７】
混合水栓接続口部（３３）は雌ねじを有しており、該口部（３３）に雄ねじ付き筒状ナット保持部材（１１）がねじ込まれている。ナット保持部材（１１）は、その前端部に外向きフランジ部（１１１）を有している。そして、固定用ナット（１２）の後端部に設けられた内向きフランジ（１２１）が、ナット保持部材（１１）の外向きフランジ（１１１）と混合水栓接続口部（３３）前端面との間に嵌め込まれている。これにより、固定用ナット（１２）が、混合水栓接続口部（３３）前端に、回動可能に設けられている。なお、水栓本体（Ｖ１）における湯導入口部および導入口部の各後端に固定用ナットが回動可能に設けられている場合もあり、それに対応させる場合には、混合水栓接続口部（３３）に、前記ナット保持部材（１１）および固定用ナット（１２）に代えて、雄ねじが設けられる。
【００２８】
次に、上記管継手（１）を用いて混合水栓（Ｖ）を給湯管および給水管に接続する方法を、図３〜５を参照して以下に説明する。まず、管継手（１）の回動筒部（３１）を後方に移動させて回動筒部（３１）と第１管継手部材（２）の嵌合部（３１２）（２４）どうしを嵌合させておいてから、第２管継手部材（３）の外方突出筒部（３２）または混合水栓接続口部（３３）を手で持って、第１管継手部材（２）後端側の雄ねじ（２１ａ）を、給湯管または給水管の末端の雌ねじにねじ込む。雄ねじ（２１ａ）のねじ込み作業が完了したら、管継手（１）の回動筒部（３１）を前方に移動させて前記嵌合部（３１２）（２４）どうしを外し、混合水栓接続口部（３３）が混合水栓（Ｖ）を接続するのに適した位置（図１参照）に来るように回動筒部（３１）を回動させる。そして、混合水栓接続口部（３３）の固定用ナット（１２）を、混合水栓（Ｖ）の水栓本体（Ｖ１）における湯または水導入口部の雄ねじにねじ嵌めて、両者を接続する。この際、給水管および給湯管の雌ねじの位置が互いに前後方向にずれている場合には、それに応じて一方または両方の管継手（１）の回動筒部（３１）を前方または後方に移動させればよい。このように、上記管継手（１）を用いれば、従来技術のように混合水栓接続口部が所要位置に来るまで雄ねじのねじ込み作業をやり直す必要がなく、また、給水管および給湯管の雌ねじの前後の位置ズレを容易に吸収することが可能であり、混合水栓の接続作業を極めて容易にかつ確実に行うことができる。
【００２９】
図６は、本発明の第２の実施形態を示すものである。この実施形態の混合水栓接続用管継手（１）では、回動筒部（３１）および第１管継手部材（２）の嵌合部（３１２ａ）（２４ａ）が、右側が欠けた欠円形の横断面を有するものとなっている。その他は、第１の実施形態と同じである。
【００３０】
図７は、本発明の第３の実施形態を示すものである。この実施形態の混合水栓接続用管継手（１）では、回動筒部（３１）および第１管継手部材（２）の嵌合部（３１２ｂ）（２４ｂ）が、左右両側が欠けた欠円形、即ち略小判形の横断面を有するものとなっている。その他は、第１の実施形態と同じである。
【００３１】
図８は、本発明の第４の実施形態を示すものである。この実施形態の混合水栓接続用管継手（１）では、回動筒部（３１）および第１管継手部材（２）の嵌合部（３１２ｃ）（２４ｃ）が、６角形の横断面を有するものとなっている。その他は、第１の実施形態と同じである。
【００３２】
図９および１０は、本発明の第５の実施形態を示すものである。この実施形態の混合水栓接続用管継手（１）では、回動筒部（３１）の嵌合部が２つの嵌合凸部（３１２ｄ）よりなり、第１管継手部材（２）の嵌合部が４つの嵌合凹部（２４ｄ）よりなる。２つの嵌合凸部（３１２ｄ）は、回動筒部（３１）の内周面の長さ中央部における左右対称位置に設けられている。４つの嵌合凹部（２４ｄ）は、第１管継手部材（２）の外周面における回動筒部前後移動区域（２Ｘ）の長さ中央部に、周方向に等間隔おきに設けられている。
【００３３】
上記管継手（１）にあっては、回動筒部（３１）を後方に移動させると、図９および１０に示すように、回動筒部（３１）の２つの嵌合凸部（３１２ｄ）と第１管継手部材（２）の２つの嵌合凹部（２４ｄ）とが互いに緩く嵌まり合り、それによって回動筒部（３１）の回動が阻止される。なお、図９および１０では、第１管継手部材（２）の４つの嵌合凹部（２４ｄ）のうち左右２つの嵌合凹部（２４ｄ）に嵌合凸部（３１２ｄ）が嵌まり込んでいるが、前後２つの嵌合凹部（２４ｄ）に嵌合凸部（３１２ｄ）が嵌まり込むようにしても勿論よい。一方、回動筒部（３１）を前方に移動させると、嵌合凸部（３１２ｄ）と嵌合凹部（２４ｄ）とが互いに前後にずれて外れ、それによって回動筒部（３１）が回動自在となる。その他は、第１実施形態とほぼ同じである。
【００３４】
図１１〜１４は、本発明の第６の実施形態を示すものである。この実施形態の混合水栓接続用管継手（１０）では、第１管継手部材（２）の外周面における回動筒部前後移動区域（２Ｘ）の後端部に２つの凸部（２６）が設けられるとともに、回動筒部（３１）の内周面後端部に、２つの凸部（２６）それぞれと係合して雄ねじ（２１ａ）締付方向への回動筒部（３１）の回動を阻止する２つの第１切欠部（３１３）と、２つの凸部（２６）それぞれと係合して雄ねじ（２１ａ）緩み方向への回動筒部（３１）の回動を阻止する２つの第２切欠部（３１４）とが設けられている。第１切欠部（３１３）には、凸部（２６）と係合した状態から回動筒部（３１）を雄ねじ（２１ａ）緩み方向に回動させた際に凸部（２６）を第１切欠部（３１３）の外に送り出す傾斜状第１案内面（３１３ａ）が設けられている。第２切欠部（３１４）には、凸部（２６）と係合した状態から回動筒部（３１）を雄ねじ（２１ａ）締付方向に回動させた際に凸部（２６）を第２切欠部（３１４）の外に送り出す傾斜状第２案内面（３１４ａ）が設けられている。
【００３５】
２つの凸部（２６）は、図１２に示すように、前記回動筒部前後移動区域（２Ｘ）の後端部の対称位置に設けられている。これらの凸部（２６）は、外周に２つの凸部を有しかつ前記回動筒部前後移動区域（２Ｘ）の後端部にねじ嵌められた凸部形成用リング（２６０）の該凸部によって構成されている。もっとも、凸部（２６）は、第１管継手部材（２）と一体に形成されていてもよい。
【００３６】
また、図１２に示すように、２つの第１切欠部（３１３）は、回動筒部（３１）の内周面後端部における１直径線上の対称位置に設けられており、２つの第２切欠部（３１４）は、前記直径線と直交する直径線上の対称位置に設けられている。第１切欠部（３１３）は、図１３に示すように、前記第１案内面（３１３ａ）の他、回動筒部（３１）の後端面と直交するように形成されかつ回動筒部（３１）を第１管継手部材（２）に対して雄ねじ（２１ａ）締付方向に回動させた際に凸部（２６）と係合する係合面（３１３ｂ）と、第１案内面（３１３ａ）と係合面（３１３ｂ）との間に回動筒部（３１）の後端面と平行になるように形成されかつ凸部（２６）と向かい合う中間面（３１３ｃ）とを備えている。第２切欠部（３１４）は、図１４に示すように、前記第２案内面（３１４ａ）の他、回動筒部（３１）の後端面と直交するように形成されかつ回動筒部（３１）を第１管継手部材（２）に対して雄ねじ（２１ａ）緩み方向に回動させた際に凸部（２６）と係合する係合面（３１４ｂ）と、第２案内面（３１４ａ）と係合面（３１４ｂ）との間に回動筒部（３１）の後端面と平行になるように形成されかつ凸部（２６）と向かい合う中間面（３１４ｃ）とを備えている。
【００３７】
管継手（１０）の上記以外の構成は、図１〜５に示す管継手（１）と同じである。
【００３８】
次に、上記管継手（１０）を用いて混合水栓を給湯管および給水管に接続する手順の一例を以下に説明する。
まず、管継手（１０）における第２管継手部材（３）の回動筒部（３１）を後方に移動させて、凸部（２６）を第１切欠部（３１３）に嵌め入れておいてから（図１１、１２、１３（ａ）参照）、第１管継手部材（２）後端側の雄ねじ（２１ａ）を給湯管および給水管の各末端の雌ねじに合わせ、第２管継手部材（３）の回動筒部（３１）を雄ねじ（２１ａ）締付方向に回動させる。すると、図１３（ａ）に示すように、凸部（２６）と第１切欠部（３１３）の係合面（３１３ｂ）とが係合して、回動筒部（３１）が第１管継手部材（２）に対して雄ねじ（２１ａ）締付方向に回動不能な状態、即ち、空回りしない状態となるので、雄ねじ（２１ａ）を雌ねじにねじ込むことができる。なお、上記において、凸部（２６）を誤って第２切欠部（３１４）に嵌め入れた場合でも、回動筒部（３１）を雄ねじ（２１ａ）締付方向に回動させると、図１４（ｂ）に示すように、第２案内面（３１４ａ）によって凸部（２６）が外に送り出されるため、誤操作のおそれがない。
雄ねじ（２１ａ）の締め込み作業が完了したら、回動筒部（３１）を雄ねじ（２１ａ）緩み方向に回動させる。すると、図１３（ｂ）に示すように、凸部（２６）が第１案内面（３１３ａ）によって第１切欠部（３１３）の外、即ち前方に送り出され、回動筒部（３１）が第１管継手部材（２）に対して回動可能となる。このように、上記管継手（１０）の場合、誤って雄ねじ（２１ａ）を緩めてしまうおそれがない。そして、混合水栓接続口部（３３）が混合水栓を接続するのに適した位置に来るように回動筒部（３１）を回動させる。最後に、混合水栓接続口部（３３）を混合水栓の水栓本体における湯または水導入口に接続する。この際、給水管および給湯管各末端の雌ねじの位置が前後方向にずれている場合には、それに応じて一方または両方の管継手（１０）の回動筒部（３１）を前方または後方に移動させればよい。
【００３９】
また、交換や接続作業のやり直し等に伴って、上記管継手（１０）を給湯管・給水管から取り外す場合は、例えば以下のようにしてその作業を行う。
即ち、まず、第２管継手部材（３）の回動筒部（３１）を後方に移動させて、凸部（２６）を第２切欠部（３１４）に嵌め入れる。そして、第２管継手部材（３）の回動筒部（３１）を雄ねじ（２１ａ）緩み方向に回動させると、図１４（ａ）に示すように、凸部（２６）と第２切欠部（３１４）の係合面（３１４ｂ）とが係合して、回動筒部（３１）が第１管継手部材（２）に対して雄ねじ（２１ａ）緩み方向に回動不能な状態、即ち空回りしない状態となるので、これにより雄ねじ（２１ａ）を雌ねじから緩めて外すことができる。なお、上記において、凸部（２６）を誤って第１切欠部（３１３）に嵌め入れた場合でも、回動筒部（３１）を雄ねじ（２１ａ）緩み方向に回動させると、図１３（ｂ）に示すように、第１案内面（３１３ａ）によって凸部（２６）が外に送り出されるため、誤操作のおそれがない。
【００４０】
以上の通り、上記管継手（１０）によれば、給湯管および給水管への混合水栓の接続作業を極めて容易にかつ確実に行うことができ、また、交換や接続作業のやり直し等に伴う給湯管・給水管からの取外し作業も簡単かつ確実に行うことができる。
【００４１】
なお、上記の実施形態はあくまでも例示にすぎず、特許請求の範囲に記載された本発明の要旨を逸脱しない範囲で適宜に変更の上、本発明を実施することは勿論可能である。
【図面の簡単な説明】
【図１】本発明の第１の実施形態を示すものであって、混合水栓接続用管継手によって混合水栓を給湯管および給水管に接続した状態を示す斜視図である。
【図２】混合水栓接続用管継手の分解斜視図である。
【図３】両嵌合部どうしが嵌合した状態の混合水栓接続用管継手の縦断面図である。
【図４】図３のＩＶ−ＩＶ線に沿う横断面図である。
【図５】両嵌合部どうしが外れた状態の混合水栓接続用管継手の縦断面図である。
【図６】本発明の第２の実施形態を示すものであって、図４に相当する混合水栓接続用管継手の横断面図である。
【図７】本発明の第３の実施形態を示すものであって、図４に相当する混合水栓接続用管継手の横断面図である。
【図８】本発明の第４の実施形態を示すものであって、図４に相当する混合水栓接続用管継手の横断面図である。
【図９】本発明の第５の実施形態を示すものであって、両嵌合部どうしが嵌合した状態の混合水栓接続用管継手の縦断面図である。
【図１０】図９のＸ−Ｘ線に沿う横断面図である。
【図１１】本発明の第６の実施形態を示すものであって、混合水栓接続用管継手の凸部が第１切欠部に嵌まり込んだ状態の縦断面図である。
【図１２】図１１のＸＩＩ−ＸＩＩ線に沿う混合水栓接続用管継手の横断面図である。
【図１３】図１１の混合水栓接続用管継手の凸部が第１切欠部に嵌まり込んだ状態を示す部分拡大図であって、（ａ）は回動筒部を雄ねじ締付方向に回動させた状態、（ｂ）は回動筒部を雄ねじ緩み方向に回動させた状態を示すものである。
【図１４】図１１の混合水栓接続用管継手の凸部が第２切欠部に嵌まり込んだ状態を示す部分拡大図であって、（ａ）は回動筒部を雄ねじ緩み方向に回動させた状態、（ｂ）は回動筒部を雄ねじ締付方向に回動させた状態を示すものである。
【符号の説明】
（１）（１０）：混合水栓接続用管継手
（２）：第１管継手部材
（２１）：給湯または給水管接続口部
（２１ａ）：雄ねじ
（２２）：湯または水導出孔
（２３）：環状連通溝
（２４）（２４ａ）（２４ｂ）（２４ｃ）：嵌合部
（２４ｄ）：嵌合凹部（嵌合部）
（２６）：凸部
（２Ｘ）：回動筒部前後移動区域
（３）：第２管継手部材
（３１）：回動筒部
（３１１）：湯または水通過孔
（３１２）（３１２ａ）（３１２ｂ）（３１２ｃ）：嵌合部
（３１２ｄ）：嵌合凸部（嵌合部）
（３１３）：第１切欠部
（３１３ａ）：第１案内面
（３１４）：第２切欠部
（３１４ａ）：第２案内面
（３２）：外方突出筒部
（３３）：混合水栓接続口部
（Ｓ）：回動筒部の前後移動可能距離[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a hot water supply pipe arranged on the back side of a wall or the like and a pipe joint for connecting a mixed water tap to each end of the water supply pipe, which is generally called a crank.
[0002]
2. Description of the Related Art
As this type of pipe joint, an integrally formed hot water supply or water supply pipe connection port is provided at the rear end of a crank-shaped pipe integrally formed, and a mixing faucet connection port is provided at the front end. Is generally known.
[0003]
When connecting the mixing faucet using the pipe fitting, first, seal tape is wrapped around the male thread at the rear end of the pipe fitting, and then the male thread is screwed into the female screw provided at each end of the hot water supply pipe and the water supply pipe. It needs to be screwed.
[0004]
However, the mixing faucet connection port is rarely at a position suitable for connecting the mixing faucet when the screwing operation of the male screw is completed. It was necessary to redo the screwing operation of the male screw several times until it came to the position, which was very troublesome.
[0005]
In addition, depending on the piping condition of the water supply pipe and the hot water supply pipe, the front ends of the female threads provided at the ends of these pipes may be shifted from each other in the front-rear direction. In some cases, the mixing faucet could not be connected normally.
[0006]
An object of the present invention is to provide a mixed faucet connection pipe joint which is excellent in workability and can solve the above problems at once.
[0007]
Means for Solving the Problems and Effects of the Invention
A first mixing faucet connecting pipe joint according to the present invention has a front end opening closed, a hot water supply or water supply pipe connection port provided with a male screw at a rear end side, and a hot water or water outlet hole formed in a peripheral wall. A first tubular joint member having a horizontal tubular shape, a rotating tubular portion rotatably and longitudinally fitted to the first fitting member so as to cover the hot water or water outlet hole, and a peripheral wall of the rotating tubular portion; It comprises an outwardly projecting cylindrical portion provided on the outer peripheral edge of the opened hot water or water passage hole in an outwardly projecting shape, and a mixing faucet connection port portion extending forward along the front end side of the outwardly projecting cylindrical portion. An outer peripheral surface of the first pipe joint member and a rotary cylinder so that the hot water or water outlet hole of the first pipe joint member communicates with the hot water or water passage hole of the rotary pipe section; An annular communication groove is provided on at least one of the inner peripheral surfaces of the portion, and the inner peripheral surface of the rotating tubular portion and the first pipe joint member are formed. When the rotating cylinder is moved rearward, it can fit together to prevent the rotation of the rotating cylinder, and when the rotating cylinder is moved forward, it moves forward and backward with respect to each other. There is provided a fitting portion which is allowed to shift and allow the rotation of the rotating cylinder.
[0008]
In the above-described pipe joint, when the rotating tubular portion of the second fitting member is moved rearward with respect to the first fitting member, the fitting portion of the rotating tubular portion and the fitting portion of the first fitting member mutually move. When they are fitted, the rotating cylinder portion cannot rotate with respect to the first pipe joint member. On the other hand, when the rotating tubular portion is moved forward with respect to the first fitting member, the fitting portions of the two are shifted forward and backward with respect to each other, so that the rotating tubular portion can rotate with respect to the first fitting member. It becomes.
[0009]
Therefore, when connecting the mixing faucet to the hot water supply pipe and the water supply pipe using the above-mentioned pipe joint, first, the turning pipe part of the pipe fitting is moved backward to fit the turning pipe part and the first pipe fitting member. After the parts are fitted together, the male screw on the rear end side of the first pipe joint member is screwed into the female screw at each end of the hot water supply pipe and the water supply pipe while holding the second pipe joint member. Then, when the screwing operation of the male screw is completed, the turning cylinder portion of the pipe joint is moved forward to remove the fitting portions, and the mixing faucet connection port is located at a position suitable for connecting the mixing faucet. The rotating cylinder is rotated to come. Finally, the mixing faucet connection port is connected to the hot water or water inlet of the mixing faucet body. At this time, if the positions of the internal threads at the ends of the water supply pipe and the hot water supply pipe are shifted in the front-rear direction, the rotating tubular portions of one or both of the pipe joints may be moved forward or backward accordingly. As described above, according to the first mixing faucet connection fitting of the present invention, the operation of connecting the mixing faucet to the hot water supply pipe and the water supply pipe can be performed extremely easily and reliably.
[0010]
In the first mixing faucet connection pipe joint according to the present invention, the two fitting portions are configured such that the rotating tubular portion cannot rotate with respect to the first fitting member in the fitted state. If so, it is not particularly limited, but has, for example, the following cross section.
That is, both fitting portions may have a gear-shaped cross section.
Also, both fitting portions may have a polygonal cross section.
In some cases, both fitting portions have a cross section of a missing circle.
Further, one fitting portion may be formed of at least one fitting projection, and the other fitting portion may be formed of at least one fitting recess fitted to the fitting projection. In this case, the number of fitting recesses may be made larger than the number of fitting protrusions, and the fitting protrusions and some of the fitting recesses may be fitted. With this configuration, it is easy to position the rotating cylinder in the rotating direction with respect to the first pipe joint member in order to fit the fitting portions together. Specifically, for example, one fitting projection is provided on one of the inner peripheral surface of the rotating tubular portion and the outer peripheral surface of the first pipe joint member, and two or more fitting convex portions are provided on the other at equal intervals in the circumferential direction. A fitting recess may be provided. Also, two fitting projections located at symmetric positions may be provided on one side, and four or more even fitting recesses may be provided on the other side at equal intervals in the circumferential direction. The two fitting portions do not need to be tightly fitted to each other. Rather, in consideration of ease of fitting and reduction of wear, when the rotating cylinder portion plays slightly, the two fitting portions are not mutually fitted. It is preferably such that it fits loosely.
[0011]
Further, on the inner peripheral surface of the rotating cylinder portion and the outer peripheral surface of the first pipe joint member, the positions where the both fitting portions are provided are engaged with each other when the rotating cylinder portion is moved backward, and There is no particular limitation as long as the positions are such that when the cylinders are moved forward, they are shifted back and forth. Specifically, a fitting portion may be provided at any of the rear end portion, the intermediate length portion, and the front end portion of the inner peripheral surface of the rotating cylinder portion, while the first pipe joint member may be provided with a fitting portion. A fitting portion is provided at a rear end portion or an intermediate length portion of the rotation tube portion front-rear movement area on the outer peripheral surface thereof.
[0012]
Next, in the second mixing faucet connection pipe joint according to the present invention, the front end opening is closed, a hot water supply or a water supply pipe connection port with a male screw is provided on the rear end side, and a hot water or water outlet hole is provided on the peripheral wall. A horizontal tubular first pipe joint member opened, and a rotary tubular section rotatably and longitudinally fitted over the first pipe joint member so as to cover the hot water or water outlet hole, and a rotary tubular section. An outwardly projecting cylindrical portion provided on the outer peripheral edge of the hot water or water passage hole opened in the peripheral wall of the outer wall, and a mixing faucet connection port extending forwardly connected to the tip side of the outwardly projecting cylindrical portion. An outer peripheral surface of the first pipe joint member so that the hot water or water outlet hole of the first pipe joint member communicates with the hot water or water passage hole of the rotating tubular section. An annular communication groove is provided on at least one of the inner peripheral surfaces of the rotating cylinder, and a rear end of the inner peripheral surface of the rotating cylinder and the At least one convex portion is provided at one of the rear ends of the rotating tubular portion longitudinally moving area on the outer peripheral surface of the pipe joint member, and the other is engaged with the convex portion to tighten the male screw. A first notch for preventing the turning of the turning cylinder portion to the turning direction, and a second notch for engaging with the convex portion and preventing the turning of the turning cylinder portion in the male screw loosening direction. The one notch is provided with an inclined first guide surface that feeds the protrusion to the outside of the first notch when the rotating cylinder is turned in the direction of loosening the male screw from a state of engagement with the protrusion. Is what it is.
[0013]
In the second fitting for connecting a faucet according to the present invention, the convex portion is further formed in the second notch portion when the rotating cylindrical portion is rotated in the direction of tightening the male screw from the state in which the convex portion is engaged. An inclined second guide surface that feeds out of the second notch may be provided.
[0014]
In the above-mentioned pipe joint, when the turning cylinder part of the second pipe joint member is moved backward with respect to the first pipe joint member, and the convex part is fitted into the first notch, the convex part and the first notch are formed. Due to the engagement with the notch, the turning cylinder cannot turn with respect to the first pipe joint member in the male screw tightening direction. In the case where the second guide surface is provided in the second notch, even if the protrusion is mistakenly fitted into the second notch, the turning cylinder is turned in the male screw tightening direction. Since the convex portion is sent out by the second guide surface, there is no possibility of erroneous operation. On the other hand, when the rotating cylinder is rotated in the male screw loosening direction with respect to the first pipe joint member from this state, the convex portion is sent out of the first notch by the first guide surface, and the rotating cylinder is moved. It becomes rotatable with respect to the first pipe joint member.
Further, when the rotating tubular portion of the second fitting member is moved backward with respect to the first fitting member and the convex portion is fitted into the second notch portion, the engagement between the convex portion and the second notch portion is established. As a result, the rotating cylinder cannot rotate with respect to the first pipe joint member in the male screw loosening direction. Even when the projection is mistakenly fitted into the first notch, if the rotating cylinder is rotated in the direction in which the male screw is loosened, the projection is sent out by the first guide surface, so there is no risk of erroneous operation. On the other hand, when the rotating tubular portion is moved forward with respect to the first fitting member from this state, the convex portion is disengaged from the second cutout portion, and the rotating tubular portion is rotated with respect to the first fitting member. It becomes possible. In the case where the second guide surface is provided in the second notch portion, when the rotating tubular portion is rotated in the male screw tightening direction with respect to the first pipe joint member, the convex portion becomes the second guide surface. As a result, the rotating tubular portion is sent out of the second cutout portion, and can be rotated with respect to the first pipe joint member.
[0015]
When the mixing faucet is connected to the hot water supply pipe and the water supply pipe using the above-described pipe joint, for example, the following operation can be performed. That is, first, the rotating tubular portion of the second pipe joint member in the pipe joint is moved rearward, and the projection is fitted into the first cutout. In this way, the male screw on the rear end side of the first pipe joint member is aligned with the female screw at each end of the hot water supply pipe and the water supply pipe, and the turning cylinder of the second pipe joint member is turned in the male screw tightening direction. Then, the convex portion and the first cutout portion are engaged with each other, so that the rotating cylinder portion cannot rotate in the male screw tightening direction with respect to the first pipe joint member, that is, does not idle. Can be screwed into the female screw. When the screwing operation of the male screw is completed, the rotating cylinder is rotated in the male screw loosening direction. Then, the convex portion is sent out of the first notch portion, that is, forward by the first guide surface, so that the rotating tubular portion can rotate with respect to the first pipe joint member. As described above, in the case of the above-described pipe joint, there is no possibility that the male screw is erroneously loosened when the rotating tubular portion is moved forward to be in a state of being rotatable with respect to the first pipe joint member. Then, the rotating cylinder is rotated so that the mixing faucet connection port comes to a position suitable for connecting the mixing faucet. Finally, the mixing faucet connection port is connected to the hot water or water inlet of the faucet body of the mixing faucet. At this time, if the positions of the internal threads at the ends of the water supply pipe and the hot water supply pipe are shifted in the front-rear direction, the rotating tubular portions of one or both of the pipe joints may be moved forward or backward accordingly.
Further, when it is necessary to remove the pipe joint from the hot water supply pipe or the water supply pipe due to replacement or reconnection of the connection work, for example, the pipe joint can be removed as follows. That is, first, the rotating tubular portion of the second pipe joint member is moved backward, and the convex portion is fitted into the second engaging portion. Then, when the turning cylinder portion of the second pipe joint member is turned in the male screw loosening direction, the projection and the second notch are engaged, and the turning tube portion is externally screwed with respect to the first pipe joint member. Since it is in a state in which it cannot rotate in the loosening direction, that is, a state in which it does not run idle, the male screw can be removed from the female screw.
As described above, according to the second mixing faucet connection fitting of the present invention, the operation of connecting the mixing faucet to the hot water supply pipe and the water supply pipe can be performed extremely easily and reliably. Removal work from the hot water supply pipe / water supply pipe accompanying the reconnection of the connection work or the like can be performed easily and reliably.
[0016]
In the first and second mixing faucet connection pipe joints according to the present invention, it is preferable that a movable distance of the rotating tubular portion in the longitudinal direction is 2 to 10 mm. When the distance in which the rotating cylinder can move back and forth is less than 2 mm, it is difficult to absorb the positional deviation of the front ends of the female threads provided at the ends of the water supply pipe and the hot water supply pipe. On the other hand, if the movable distance of the rotating cylinder portion in the front-rear direction exceeds 10 mm, the first pipe joint member may be too long and protrude forward to obstruct.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 5 show a first embodiment of the present invention.
[0018]
In FIG. 1, a pipe joint (1) for connecting a mixing faucet according to the present invention is provided at each end of a hot water supply pipe (not shown) and a water supply pipe (not shown) vertically arranged on the back side of a wall (W) of a bathroom or the like. Is connected to the mixing faucet (V). Although not shown in detail, female screws which are opened forward are provided at each end of the hot water supply pipe and the water supply pipe, and these female screws are formed on the wall (W) through holes formed in the wall (W). It is exposed on the front side. The mixing faucet (V) of FIG. 1 is of a single lever type, and has a rearwardly projecting male-threaded hot water inlet (not shown) and a male-threaded water inlet on the rear surface of the faucet body (V1). (Not shown) are provided side by side.
[0019]
As shown in FIGS. 2 to 5, the pipe joint (1) for mixing faucet connection includes a first pipe joint member (2) and a second pipe joint member (3). The first pipe joint member (2) has a front end opening closed, a hot water supply or water supply pipe connection port (21) provided with a male screw (21a) on the rear end side, and a plurality of hot water or water outlet holes (21) in a peripheral wall. Reference numeral 22) denotes a horizontal cylindrical member which is spaced apart in the circumferential direction. The second pipe joint member (3) is rotatably and longitudinally fitted to the first pipe joint member (2) so as to cover the hot or cold water outlet hole (22). ), An outwardly projecting cylindrical portion (32) provided on the outer peripheral edge of the hot water or water passage hole (311) formed in the peripheral wall of the rotating cylindrical portion (31), and an outwardly projecting cylindrical portion. A mixing faucet connection port (33) extending forward from the tip of (32). The first pipe joint member (2) is connected so that the hot water or water outlet hole (22) of the first pipe joint member (2) communicates with the hot water or water passage hole (311) of the rotary cylinder (31). An annular communication groove (23) is provided on the inner peripheral surface. At the rear end portion of the inner peripheral surface of the rotating tube portion (31) and the rear end portion of the rotating tube portion longitudinal movement area (2X) on the outer peripheral surface of the first pipe joint member (2), the rotating tube portion ( When the rotating cylinder (31) is moved forward, it can be fitted to each other to prevent the rotation of the rotating cylinder (31). The fitting portions (312) and (24) that allow the rotation of the rotating cylinder portion (31) are provided. The two fitting portions (312) and (24) have a gear-shaped cross section as shown in FIG. The movable distance (S) of the rotating cylinder part (31) in the longitudinal direction is about 10 mm (see FIGS. 3 and 5).
[0020]
The hot water supply or water supply pipe connection port (21) with the external thread (21a) of the first pipe joint member (2) has a length of about one third of the entire length of the member (2). An annular cover (4) for covering a hole formed in the wall (W) is fitted to the male screw (21a).
[0021]
At the front end of the outer peripheral surface of the first pipe joint member (2), there is provided an annular flange portion (25) for preventing the rotating tubular portion (31) from falling forward. An annular groove is formed in the outer peripheral surface of the first pipe joint member (2) at a portion adjacent to the male screw (21a) in front of the male screw (21a), and a C-shaped stopper ( 5) is fitted. On the outer peripheral surface of the first pipe joint member (2), a portion between the flange portion (25) and the stopper (5) forms a rotating cylinder portion longitudinal movement area (2X).
[0022]
Two front and rear packing receiving grooves are formed at predetermined intervals in the middle of the rotary tubular portion front / rear movement area (2X) on the outer peripheral surface of the first pipe joint member (2), and packing (6) formed of an O-ring is formed in these grooves. ) Is fitted to the inner peripheral surface of the rotating cylindrical portion (31) so as to be able to come into close contact therewith. Due to the frictional resistance between the packing (6) and the outer peripheral surface of the first pipe joint member (2), the second pipe joint member (3) does not rotate freely due to its own weight. The annular communication groove (23) is formed between two front and rear packings (6). The hot water or water outlet hole (22) opens at the bottom of the annular communication groove (23). Note that at least one hot water or water outlet hole (22) may be provided.
[0023]
An annular inwardly protruding portion (25) is provided on the inner peripheral surface of the first pipe joint member (2) at a portion next to the hot water or water outlet hole (22). The front end opening of the first fitting (2) is closed by a male threaded closing member (7) screwed into the female threaded front end of the member (2). A through hole with a female screw is formed in the axial center of the closing member (7), and a rod-shaped valve element operating member (81) with a male screw is screwed into the hole. A ring-shaped valve body (82) made of an elastic material such as rubber is screwed to the rear end of the valve body operation member (81), and is constituted by the front surface of the inwardly protruding portion (25) of the first pipe joint member (2). The valve seat (83) can be brought into contact with and separated from the valve seat (83). The water shutoff valve (8) is constituted by the valve element operating member (81), the valve element (82), and the valve seat (83). In addition, the water stop valve (8) does not necessarily need to be provided in the first pipe joint member (2).
[0024]
In the second pipe joint member (3), the hot water or water passage hole (311) of the rotary pipe part (31) is formed by turning the pipe part (31) on the outer peripheral surface of the first pipe joint member (2). Irrespective of the position in the forward / backward movement area (2X), the first pipe joint member (2) communicates with the hot water or water outlet hole (22) through the annular communication groove (23). .
[0025]
As shown in FIG. 4, the fitting portion (312) of the rotating cylinder portion (31) has an external gear-shaped cross section in which a number of isosceles triangular teeth are regularly provided on the outer periphery. On the other hand, the fitting portion (24) of the first pipe joint member (2) to be fitted thereto has an internal gear in which a large number of isosceles triangular teeth are regularly provided on the inner periphery as shown in FIG. It has a cross section of the shape. As in this embodiment, if both fitting portions (312) and (24) are formed by so-called serrations having a gear-shaped cross section, circumferential positioning can be easily performed when the two are fitted.
[0026]
The distal end of the outwardly projecting cylindrical portion (32) is open upward in FIGS. The tip opening is closed by a male threaded closure member (9) threaded into the female threaded tip of the outwardly projecting barrel (32). A recess (91) is provided on the inner end side of the closing member (9). The distal end side inside the outwardly projecting cylindrical portion (32) has a larger diameter than the proximal end side, and an annular inwardly projecting portion (321) is provided at the boundary between the two. Then, a cylindrical strainer (10) is fitted into the recessed portion (91) and the other end is fitted to the inwardly protruding portion (321) on the distal end side in the outwardly protruding cylindrical portion (32). It is fixed in contact.
[0027]
The mixing faucet connection port (33) has a female screw, and a cylindrical nut holding member (11) with a male screw is screwed into the port (33). The nut holding member (11) has an outward flange (111) at its front end. The inward flange (121) provided at the rear end of the fixing nut (12) is connected to the outward flange (111) of the nut holding member (11) and the front end face of the mixing faucet connection port (33). It is fitted between. Thereby, the fixing nut (12) is rotatably provided at the front end of the mixing faucet connection port (33). In some cases, a fixing nut may be rotatably provided at each of the hot water inlet and the rear end of the inlet of the water faucet body (V1). A male screw is provided in the portion (33) instead of the nut holding member (11) and the fixing nut (12).
[0028]
Next, a method of connecting the mixing faucet (V) to the hot water supply pipe and the water supply pipe by using the pipe fitting (1) will be described below with reference to FIGS. First, the rotating tubular part (31) of the pipe joint (1) is moved rearward to fit the fitting part (312) (24) between the rotating tubular part (31) and the first pipe joint member (2). After the fitting, the outwardly projecting cylindrical portion (32) or the mixing faucet connection port (33) of the second pipe joint member (3) is held by hand, and the rear end of the first pipe joint member (2) is held. The external male screw (21a) is screwed into the female screw at the end of the hot water supply pipe or the water supply pipe. When the screwing operation of the male screw (21a) is completed, the rotating tubular portion (31) of the pipe joint (1) is moved forward to disengage the fitting portions (312) and (24), and the mixing faucet connection port portion is removed. The rotating cylinder (31) is rotated so that (33) comes to a position (see FIG. 1) suitable for connecting the mixing faucet (V). Then, the fixing nut (12) of the mixing faucet connection part (33) is screwed into the male screw of the hot water or water introduction part of the faucet main body (V1) of the mixing faucet (V), and the two are connected. I do. At this time, if the positions of the female threads of the water supply pipe and the hot water supply pipe are shifted from each other in the front-rear direction, the turning cylinder part (31) of one or both of the pipe joints (1) is moved forward or backward accordingly. You can do it. As described above, when the pipe joint (1) is used, it is not necessary to repeat the screwing operation of the male screw until the mixing faucet connection portion comes to a required position unlike the prior art, and the female screw of the water supply pipe and the hot water supply pipe is not required. , It is possible to easily absorb the misalignment before and after, and to connect the mixing faucet extremely easily and reliably.
[0029]
FIG. 6 shows a second embodiment of the present invention. In the mixed faucet connection pipe joint (1) of this embodiment, the fitting part (312a) (24a) of the rotating tubular part (31) and the first pipe joint member (2) is a broken circle with the right side chipped. . Others are the same as the first embodiment.
[0030]
FIG. 7 shows a third embodiment of the present invention. In the pipe joint (1) for connecting a mixing faucet according to this embodiment, the fitting portions (312b) (24b) of the rotating tubular part (31) and the first pipe joint member (2) are cut off on both left and right sides. It has a circular or substantially oval cross section. Others are the same as the first embodiment.
[0031]
FIG. 8 shows a fourth embodiment of the present invention. In the mixed faucet connection pipe joint (1) of this embodiment, the turning cylinder part (31) and the fitting parts (312c) (24c) of the first pipe joint member (2) have a hexagonal cross section. It has what it has. Others are the same as the first embodiment.
[0032]
9 and 10 show a fifth embodiment of the present invention. In the pipe fitting (1) for connecting a mixing faucet according to this embodiment, the fitting portion of the rotating tubular portion (31) is composed of two fitting projections (312d), and the fitting of the first pipe fitting member (2). The mating portion is composed of four fitting concave portions (24d). The two fitting projections (312d) are provided at left-right symmetrical positions in the center of the length of the inner peripheral surface of the rotating cylinder (31). The four fitting recesses (24d) are provided at regular intervals in the circumferential direction at the center of the length of the rotating tubular part longitudinal movement area (2X) on the outer peripheral surface of the first pipe joint member (2). .
[0033]
In the pipe joint (1), when the rotating cylinder (31) is moved backward, as shown in FIGS. 9 and 10, the two fitting projections (312d) of the rotating cylinder (31) are moved. ) And the two fitting recesses (24d) of the first pipe joint member (2) are loosely fitted to each other, thereby preventing the rotation of the rotating cylinder (31). 9 and 10, the fitting protrusion (312d) is fitted into the two fitting recesses (24d) on the left and right of the four fitting recesses (24d) of the first pipe joint member (2). However, it goes without saying that the fitting projection (312d) may be fitted into the two front and rear fitting recesses (24d). On the other hand, when the rotating cylinder (31) is moved forward, the fitting protrusion (312d) and the fitting recess (24d) are displaced back and forth and come off, whereby the rotating cylinder (31) rotates. Be free to move. Others are almost the same as the first embodiment.
[0034]
11 to 14 show a sixth embodiment of the present invention. In the mixed faucet connection pipe joint (10) of this embodiment, two convex portions (26) are provided at the rear end of the rotating tubular portion longitudinally moving area (2X) on the outer peripheral surface of the first pipe joint member (2). And at the rear end of the inner peripheral surface of the rotating cylinder (31), the two cylinders (26) are engaged with each other to engage with the male screw (21a) in the direction of tightening the rotating cylinder (31). Engages with each of the two first notches (313) and the two protrusions (26) for preventing the rotation of the rotary cylinder (31) in the loosening direction of the male screw (21a). And two second notches (314). The first notch (313) is provided with the first protrusion (26) when the turning cylinder (31) is turned in the loosening direction of the male screw (21a) from the state of engagement with the protrusion (26). An inclined first guide surface (313a) for feeding out of the notch (313) is provided. The second cutout (314) is provided with the second protrusion (26) when the turning cylinder (31) is turned in the direction of tightening the male screw (21a) from the state of engagement with the protrusion (26). An inclined second guide surface (314a) for feeding out of the two notches (314) is provided.
[0035]
As shown in FIG. 12, the two convex portions (26) are provided at symmetrical positions on the rear end of the rotating tubular portion longitudinal movement area (2X). These convex portions (26) have two convex portions on the outer periphery and are screwed into the rear end portion of the rotating tubular portion longitudinal movement area (2X) to form the convex portion forming ring (260). Part. However, the protrusion (26) may be formed integrally with the first pipe joint member (2).
[0036]
Further, as shown in FIG. 12, the two first notches (313) are provided at symmetrical positions on one diameter line at the rear end of the inner peripheral surface of the rotating cylinder (31), and the two first notches (313) are provided. The two notches (314) are provided at symmetrical positions on a diameter line orthogonal to the diameter line. As shown in FIG. 13, the first notch portion (313) is formed so as to be orthogonal to the rear end surface of the turning cylinder portion (31) in addition to the first guide surface (313a), and the turning cylinder portion (313). An engagement surface (313b) that engages with the convex portion (26) when the (31) is rotated in the male screw (21a) tightening direction with respect to the first pipe joint member (2), and a first guide surface (31). An intermediate surface (313c) formed between 313a) and the engagement surface (313b) so as to be parallel to the rear end surface of the rotating cylinder (31) and facing the projection (26). As shown in FIG. 14, the second notch (314) is formed so as to be orthogonal to the rear end face of the rotating cylinder (31), in addition to the second guide surface (314a), and is formed of the rotating cylinder ( An engagement surface (314b) that engages with the projection (26) when the male screw (31) is rotated in a loosening direction of the male screw (21a) with respect to the first pipe joint member (2), and a second guide surface (314a). ) And an engagement surface (314b), and an intermediate surface (314c) formed to be parallel to the rear end surface of the rotating cylindrical portion (31) and facing the convex portion (26).
[0037]
The other configuration of the pipe joint (10) is the same as that of the pipe joint (1) shown in FIGS.
[0038]
Next, an example of a procedure for connecting the mixing faucet to the hot water supply pipe and the water supply pipe by using the pipe joint (10) will be described below.
First, the rotating tubular portion (31) of the second pipe joint member (3) in the pipe joint (10) is moved rearward so that the projection (26) is fitted into the first cutout (313). (See FIGS. 11, 12, and 13 (a)), the male screw (21a) on the rear end side of the first pipe joint member (2) is aligned with the female screw at each end of the hot water supply pipe and the water supply pipe, and the second pipe joint member ( 3) The rotating cylinder (31) is rotated in the direction of tightening the male screw (21a). Then, as shown in FIG. 13A, the projection (26) and the engagement surface (313b) of the first notch (313) are engaged, and the rotating cylinder (31) is moved to the first tube. The male screw (21a) cannot be rotated in the direction of tightening the male screw (21a) with respect to the joint member (2), that is, does not idle, so that the male screw (21a) can be screwed into the female screw. In the above description, even when the convex portion (26) is mistakenly fitted into the second cutout (314), if the rotating cylindrical portion (31) is rotated in the direction of tightening the male screw (21a), FIG. As shown in (b), since the convex portion (26) is sent out by the second guide surface (314a), there is no possibility of erroneous operation.
When the operation of tightening the male screw (21a) is completed, the turning cylinder (31) is turned in the direction in which the male screw (21a) is loosened. Then, as shown in FIG. 13 (b), the convex portion (26) is sent out of the first cutout (313), that is, forward by the first guide surface (313a), and the rotating cylinder (31) is moved. It becomes rotatable with respect to the first pipe joint member (2). Thus, in the case of the pipe joint (10), there is no possibility that the male screw (21a) is accidentally loosened. Then, the rotating cylinder (31) is rotated such that the mixing faucet connection port (33) comes to a position suitable for connecting the mixing faucet. Finally, the mixing faucet connection port (33) is connected to hot water or a water inlet of the faucet body of the mixing faucet. At this time, if the positions of the female threads at the ends of the water supply pipe and the hot water supply pipe are shifted in the front-rear direction, the turning cylinder part (31) of one or both of the pipe joints (10) is moved forward or backward accordingly. Just move it.
[0039]
When the pipe joint (10) is removed from the hot water supply pipe or the water supply pipe due to replacement or redoing of the connection work, for example, the work is performed as follows.
That is, first, the rotating tubular portion (31) of the second pipe joint member (3) is moved backward, and the convex portion (26) is fitted into the second cutout (314). Then, when the turning tubular portion (31) of the second pipe joint member (3) is turned in the loosening direction of the male screw (21a), as shown in FIG. 14 (a), the convex portion (26) and the second notch are formed. A state in which the engagement surface (314b) of the portion (314) is engaged, and the rotating cylinder portion (31) cannot rotate in the loosening direction of the male screw (21a) with respect to the first pipe joint member (2); That is, since the idle rotation does not occur, the male screw (21a) can be loosened and removed from the female screw. In the above description, even when the convex portion (26) is mistakenly fitted into the first notch portion (313), if the rotating cylinder portion (31) is rotated in the direction in which the male screw (21a) is loosened, FIG. As shown in b), since the convex portion (26) is sent out by the first guide surface (313a), there is no possibility of erroneous operation.
[0040]
As described above, according to the pipe joint (10), the operation of connecting the mixing faucet to the hot water supply pipe and the water supply pipe can be performed extremely easily and reliably, and the replacement and reconnection of the connection work are involved. Removal work from hot water pipes and water supply pipes can be performed easily and reliably.
[0041]
The above embodiment is merely an example, and it is a matter of course that the present invention can be implemented after being appropriately changed without departing from the gist of the present invention described in the claims.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of the present invention, showing a state in which a mixing faucet is connected to a hot water supply pipe and a water supply pipe by a mixing faucet connection fitting.
FIG. 2 is an exploded perspective view of a pipe joint for connecting a mixing faucet.
FIG. 3 is a vertical cross-sectional view of a pipe joint for connecting a mixing faucet in a state where both fitting portions are fitted to each other.
FIG. 4 is a transverse sectional view taken along the line IV-IV in FIG. 3;
FIG. 5 is a longitudinal sectional view of the mixed faucet connection pipe joint in a state where both fitting portions are disengaged from each other.
6 shows a second embodiment of the present invention and is a cross-sectional view of a mixed faucet connection pipe joint corresponding to FIG. 4. FIG.
FIG. 7 shows a third embodiment of the present invention, and is a cross-sectional view of a fitting for connecting a mixing faucet, corresponding to FIG.
FIG. 8 shows a fourth embodiment of the present invention, and is a cross-sectional view of a fitting for connecting a mixing faucet, corresponding to FIG.
FIG. 9 shows a fifth embodiment of the present invention, and is a longitudinal sectional view of a mixed faucet connection pipe joint in a state where both fitting portions are fitted to each other.
FIG. 10 is a transverse sectional view taken along line XX of FIG. 9;
FIG. 11 shows a sixth embodiment of the present invention, and is a longitudinal sectional view showing a state where a convex portion of a pipe joint for mixing faucet connection is fitted into a first cutout portion.
12 is a cross-sectional view of the fitting for connecting a mixing faucet, taken along line XII-XII in FIG. 11;
FIG. 13 is a partially enlarged view showing a state in which a convex portion of the pipe joint for mixing faucet connection of FIG. 11 is fitted into a first cutout portion, and (a) is a diagram illustrating a rotating cylinder portion in a direction of tightening a male screw. (B) shows a state in which the rotating cylinder is rotated in the direction of loosening the male screw.
14 is a partially enlarged view showing a state in which a convex portion of the mixed faucet connection pipe joint of FIG. 11 is fitted into a second cutout portion, and (a) is a diagram in which a rotating cylinder portion is moved in a direction in which a male screw is loosened. (B) shows a state in which the rotating cylinder is rotated in the male screw tightening direction.
[Explanation of symbols]
(1) (10): Fitting for connection of mixed faucet
(2): First pipe joint member
(21): Hot water supply or water supply pipe connection
(21a): Male screw
(22): Hot water or water outlet
(23): Annular communication groove
(24) (24a) (24b) (24c): Fitting part
(24d): fitting recess (fitting portion)
(26): convex portion
(2X): Rotating cylinder part front-back movement area
(3): Second pipe joint member
(31): rotating cylinder
(311): Hot water or water passage hole
(312) (312a) (312b) (312c): Fitting part
(312d): Fitting convex part (fitting part)
(313): First notch
(313a): First guide surface
(314): second notch
(314a): Second guide surface
(32): outwardly projecting cylinder
(33): Mixing faucet connection port
(S): Distance that can be moved back and forth of the rotating cylinder

Claims

A horizontal cylindrical first pipe joint member having a front end opening closed, a hot water supply or water supply pipe connection port provided with a male screw on a rear end side, and a hot water or water outlet hole formed in a peripheral wall;
A rotary cylinder portion rotatably and longitudinally fitted to the first pipe joint member so as to cover the hot water or water outlet hole, and a hot water or water passage hole formed on a peripheral wall of the rotary cylinder portion. An outer protruding cylindrical portion provided in an outer protruding shape on the peripheral edge, and a second pipe joint member comprising a mixing faucet connection port portion extending forward and connected to the tip side of the outer protruding cylindrical portion,
At least one of an outer peripheral surface of the first fitting member and an inner peripheral surface of the rotating tubular portion so that the hot water or water outlet hole of the first fitting member communicates with the hot water or water passing hole of the rotating tubular portion. Is provided with an annular communication groove,
When the rotating cylinder is moved backward, the inner peripheral surface of the rotating cylinder and the outer peripheral surface of the first pipe joint member are fitted to each other to prevent rotation of the rotating cylinder. A fitting for connecting a mixing faucet, wherein a fitting portion is provided, which is rotatable forward and backward with respect to each other when the rotating cylinder is moved forward, and which allows the rotation of the rotating cylinder.

2. The mixing faucet connection according to claim 1, wherein the two fitting portions have a gear-shaped cross section.

2. The fitting according to claim 1, wherein both fittings have a polygonal cross section.

The pipe fitting for connecting a mixing faucet according to claim 1, wherein both the fitting portions have a cross section of a missing circle.

2. The mixed faucet connection pipe according to claim 1, wherein one fitting portion comprises at least one fitting projection, and the other fitting portion comprises at least one fitting recess fitted to the fitting projection. Fittings.

A horizontal cylindrical first pipe joint member having a front end opening closed, a hot water supply or water supply pipe connection port provided with a male screw on a rear end side, and a hot water or water outlet hole formed in a peripheral wall;
A rotary cylinder portion rotatably and longitudinally fitted to the first pipe joint member so as to cover the hot water or water outlet hole, and a hot water or water passage hole formed on a peripheral wall of the rotary cylinder portion. An outer protruding cylindrical portion provided in an outer protruding shape on the peripheral edge, and a second pipe joint member comprising a mixing faucet connection port portion extending forward and connected to the tip side of the outer protruding cylindrical portion,
At least one of an outer peripheral surface of the first fitting member and an inner peripheral surface of the rotating tubular portion so that the hot water or water outlet hole of the first fitting member communicates with the hot water or water passing hole of the rotating tubular portion. Is provided with an annular communication groove,
At least one projection is provided at one of a rear end portion of an inner circumferential surface of the turning tube portion and a rear end portion of the turning tube portion front-rear movement area on an outer circumferential surface of the first pipe joint member. On the other hand, a first cutout portion that engages with the convex portion to prevent the rotation of the rotary cylinder in the male screw tightening direction, and engages with the projection to rotate the rotary cylinder portion in the male screw loosening direction. A second notch for preventing movement,
The first notch is provided with an inclined first guide surface which feeds the protrusion out of the first notch when the rotating cylinder is turned in the direction of loosening the male screw from a state in which the protrusion is engaged. There is a fitting for connecting a mixing faucet.

Further, the second notch has an inclined second guide surface which feeds the protrusion out of the second notch when the rotating cylinder is turned in the direction of tightening the male screw from a state in which the protrusion is engaged with the protrusion. The pipe joint for connecting a mixing faucet according to claim 6, which is provided.

The pipe joint for connecting a mixing faucet according to any one of claims 1 to 7, wherein a movable distance of the rotating cylinder portion in the front-rear direction is 2 to 10 mm.