JP3822021B2

JP3822021B2 - Pipe joint connection method and pipe joint structure

Info

Publication number: JP3822021B2
Application number: JP2000145233A
Authority: JP
Inventors: 正雄仲石; 義憲上田; 博史八木
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 1999-05-18
Filing date: 2000-05-17
Publication date: 2006-09-13
Anticipated expiration: 2020-05-17
Also published as: JP2001032978A

Description

【０００１】
【発明の属する技術分野】
本発明は、管継手の連結方法及び管継手構造に関するものである。
【０００２】
【従来の技術】
高層建築物等において各階を貫くように設けられる排水用の立主管や、この立主管に接続する横引き管等は、所定長さの直管同士、直管と集合管、直管と曲がり管等を連結することによって配管されるようになっているが、一般に、これらの管の連結には、図７に示されるようなフランジ継手構造が採用されている。
この継手構造では、一方の管３０の端部をやや大径の受け口３１に形成するとともに、該受け口３１の開口端外周にフランジ３２を突出しており、これに対し、他方の管３３は、受け口３１に挿入可能なようにストレート管に形成され、その挿入端部に、押し輪（押圧部材）３４、ロックリング３５、カラー３６、パッキン３７等をこの順で外嵌している（ロックリング３５，カラー３６を省略して押し輪３４、パッキン３７のみをこの順で外嵌する場合もある）。
【０００３】
そして、この他方の管３３を前記受け口３１に挿入するとともに、前記フランジ３２と押し輪３４とを複数のボルト３８及びナット３９で結合し、これを締め付けることにより、パッキン３７等を圧縮して双方の管３０，３３を互いに水密的に連結するものであった。
【０００４】
【発明が解決しようとする課題】
上記の継手構造では、他方の管３３端部に予めパッキン３７、押し輪３４等を仮止め状態で装着し、この管３３を一方の管３０の受け口３１に挿入したあとに、フランジ３２と押し輪３４のボルト孔４０，４１の位置合わせやボルト３８の挿入、ナット３９の締め付けといった作業を行う必要がある。
これらの作業は他方の管３３の挿入状態を保持しながら行わなければならないことから非常に面倒な作業となり、これを複数箇所のボルト３８について繰り返し行うことで、全体としての施工性をかなり悪化させるものとなっていた。
【０００５】
特に、建築物の各階床の間に設けられる立主管の上端と、各階に設けられる集合管の下側の受け口との連結では、ある階の集合管に対してその下の階から立主管を連結しなければならないため、この部分に上記継手構造を採用すると、下の階から高所の作業になるとともに、上の階に迫る位置での作業となることから、上記のようなボルト締結作業がより一層困難なものとなっていた。
また、一方の管３０の受け口３１に他方の管３３端部を挿入したとき、この他方の管３３に仮止めしたパッキン３７等が受け口３１に対して傾く恐れがあり、これによって双方の管３０，３３のシール効果を損なう恐れも生じていた。
【０００６】
そこで本発明は上記実情に鑑み、管相互の連結を簡単且つ迅速に行えるようにして施工性を向上する管継手の連結方法及び管継手構造を提供することを目的とする。
【０００７】
【課題を解決するための手段】
本発明は、上記目的を達成するために以下の技術的手段を講じている。
すなわち、本発明は、建築物の各階床の間に設けられる立主管３の上端と、各階に設けられる集合管２の下部の下連結管７の受け口１１とを連結する管継手の連結方法であって、
予め前記下連結管７には、その受け口１１の内周面に、前記立主管３の端部外周面との間をシールするシール部材１８を装着し、且つ前記受け口１１に前記シール部材１８を管軸方向に圧縮する押圧部材２４を仮止め状態で装着しておき、しかる後前記シール部材１８に対して前記立主管３を挿入するとともに、前記押圧部材２４によりシール部材１８を圧縮することにより、双方の管７，３をシール部材１８によりシールした状態で連結する様にしたことを特徴とするものである。
【０００８】
また、建築物の各階床の間に設けられる立主管３の上端と、各階に設けられる集合管２の下部の下連結管７の受け口１１とを連結する管継手の連結方法であって、
予め前記下連結管７には、その受け口１１の内周面に、前記立主管３の端部外周面との間をシールし且つ装着前の外周径が受け口１１の内周径よりも若干大径に形成されているシール部材１８を、その弾性により受け口１１の内周に圧接状態にて装着し、且つ前記受け口１１に前記シール部材１８を管軸方向に圧縮する押圧部材２４を仮止め状態で装着しておき、しかる後前記シール部材１８に対して前記立主管３を挿入するとともに、前記押圧部材２４によりシール部材１８を圧縮することにより、双方の管７，３をシール部材１８によりシールした状態で連結する様にしたことを特徴とするものである。
【０００９】
また、建築物の各階床の間に設けられる立主管３の上端と、各階に設けられる集合管２の下部の下連結管７の受け口１１とを連結する管継手の連結方法であって、
予め前記下連結管７には、その受け口１１の内周面に、前記立主管３の端部外周面との間をシールし且つ上部側が薄肉で下部側が厚肉とした筒状であって装着前の外周径が受け口１１の内周径よりも若干大径に形成されているシール部材１８を、その弾性により受け口１１の内周に圧接状態にて装着し、且つ前記受け口１１に前記シール部材１８を管軸方向に圧縮する押圧部材２４を仮止め状態で装着しておき、しかる後前記シール部材１８に対して前記立主管３を挿入するとともに、前記押圧部材２４によりシール部材１８を圧縮することにより、双方の管７，３をシール部材１８によりシールした状態で連結する様にしたことを特徴とするものである。
【００１０】
また、建築物の各階床の間に設けられる立主管３の上端と、各階に設けられる集合管２の下部の下連結管７の受け口１１とを連結する管継手の連結方法であって、
予め前記下連結管７には、その受け口１１の内周面に、前記立主管３の端部外周面との間をシールし且つ上部側が薄肉で下部側が厚肉とした筒状であって装着前の外周径が受け口１１の内周径よりも若干大径に形成されているシール部材１８を、その弾性により受け口１１の内周に圧接状態にて装着し、且つ前記受け口１１に前記シール部材１８の下端面を保護する様に密着した状態で管軸方向に圧縮する押圧部材２４を仮止め状態で装着しておき、しかる後前記シール部材１８に対して前記立主管３を挿入するとともに、前記押圧部材２４によりシール部材１８を圧縮することにより、双方の管７，３をシール部材１８によりシールした状態で連結する様にしたことを特徴とするものである。
【００１１】
また、建築物の各階床の間に設けられる立主管３の上端と、各階に設けられる集合管２の下部の下連結管７の受け口１１とを連結する管継手構造であって、
双方の管７，３の連結前の状態において、前記下連結管７は、その受け口１１の内周面に、前記立主管３の端部外周面との間をシールするシール部材１８を装着し、且つ前記受け口１１に前記シール部材１８を管軸方向に圧縮する押圧部材２４を仮止め状態で装着しており、前記シール部材１８に対して前記立主管３を挿入するとともに、前記押圧部材２４によりシール部材１８を圧縮することにより、双方の管７，３をシール部材１８によりシールした状態で連結するように構成したことを特徴とするとするものである。
【００１２】
また、建築物の各階床の間に設けられる立主管３の上端と、各階に設けられる集合管２の下部の下連結管７の受け口１１とを連結する管継手構造であって、
双方の管７，３の連結前の状態において、前記下連結管７は、その受け口１１の内周面に、前記立主管３の端部外周面との間をシールし且つ上部側が薄肉で下部側が厚肉とした筒状であって装着前の外周径が受け口１１の内周径よりも若干大径に形成されているシール部材１８を、その弾性により受け口１１の内周に圧接状態にて装着し、且つ前記受け口１１に前記シール部材１８の下端面を保護する様に密着した状態で管軸方向に圧縮する押圧部材２４を仮止め状態で装着しており、前記シール部材１８に対して前記立主管３を挿入するとともに、前記押圧部材２４によりシール部材１８を圧縮することにより、双方の管７，３をシール部材１８によりシールした状態で連結するように構成したことを特徴とするものである。
【００１３】
これによれば、双方の管７，３の連結前に、予め下連結管７の受け口１１側にシール部材１８及び押圧部材２４を装着しておき、この状態から、受け口１１側のシール部材１８に対して他方の管３の端部を挿入し、押圧部材２４によってシール部材１８を圧縮することで双方の管７，３の連結を行う。
したがって、従来のように、施工時の現場作業で他方の管３の挿入後に押圧部材２４とフランジとのボルト孔位置合わせやボルトの挿入作業を行う必要もなく、即座に押圧部材２４の締付作業等が行えて施工性の向上が可能であり、特に、集合管２における下連結管７の受け口１１と立主管３の上端との連結において本発明の継手構造を採用することで連結作業の労力がより軽減されるものとなる。
【００１４】
ここで、前記押圧部材２４を仮止め状態としておくことで、立主管３の挿入が支障なく行え、また、立主管３の端部外周径よりも、シール部材１８の内周径を大きく形成してやれば、立主管３の挿入がより容易に行えるようになり、この場合でも、押圧部材２４の締め付けによるシール部材１８の圧縮によって双方の管７，３の水密は確実に保たれる。
前記シール部材１８において、前記受け口１１への挿入側の外周面を、先細り状となるテーパー面に形成するのが好ましい。
【００１５】
これによって、シール部材１８を受け口１１に容易に装着することができるようになる。
また、前記シール部材１８の内径ｄ１と前記立主管３の差し口３Ａの外径Ｄ２との関係が、（ｄ１−５ｍｍ）≦Ｄ２≦（ｄ１−２ｍｍ）又は（ｄ１−４ｍｍ）≦Ｄ２≦（ｄ１−１ｍｍ）を満たすことが好ましい。
【００１６】
【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３は、建築物等における排水管等の配管構造を示しており、この建築物の各階床スラブ１には集合管２が固定され、該集合管２の上下に立主管３が連結され、集合管２の上部に横引き管４が連結されたものとなっている。
集合管２は、本体部５と、その上下に設けられて前記立主管３が連結される上、下連結管６，７と、横引き管４が連結される横連結管８とを備えてなり、本体部５は、各階床スラブ１に形成した通孔９に挿通状とされてモルタル１０等によって固定されるようになっている。
【００１７】
本発明に係る管継手構造は、例えば、図３における矢示Ａ部の連結、すなわち、集合管２の下連結管（一方の管）７と立主管（他方の管）３の上端部との間の連結等に有用に採用されるものであり、この部分を拡大して示す図１及び図２において、下連結管７の端部には、下方に開口した受け口１１を有し、一方、立主管３はストレート管とされてその上端（差し口３Ａ）が受け口１１に挿入されるようになっている。
なお、図１には下連結管７と立主管３の連結前の状態を示し、図２には連結後の状態を示している。
【００１８】
図１において、前記受け口１１は、立主管３を挿入可能とするように段部１２を介して若干大径に形成されており、この大径部１３の端部内周には、開口側（下側）が拡開状となるテーパー面１４を有している。また、受け口１１の端部外周には、径外方向に突出するフランジ１５が一体に形成され、該フランジ１５には、管軸方向に貫通するボルト挿通孔１６が周方向所定間隔をおいて複数形成されている。
前記大径部１３の内周面には、立主管３の外周面との間を水密的にシールするシール部材１８が装着されている。このシール部材１８は、合成ゴム等によって大径部１３に内嵌可能な筒状に形成されており、上部側が薄肉部１９、下部側が厚肉部２０に形成され、薄肉部１９の上端には、径内方向に突出して前記段部１２に重合される鍔部２１が一体に形成されている。
【００１９】
また、鍔部２１を除くシール部材１８の内周面は、凹凸の無いほぼストレートとなる平坦面に形成されており、よって厚肉部２０の外周は薄肉部１９に対して段部２２を介して径外方向に膨出し、この段部２２は、受け口１１のテーパー面１４に面接触するテーパー面に形成されている。また、シール部材１８は、その下端部が受け口１１から突出した状態で装着されるようになっている。
前記シール部材１８において、その外周径は、受け口１１の内周径よりも若干大径に形成されており、シール部材１８は、その弾性によって受け口１１の内周に圧接するようになっている。そのため、受け口１１との間に隙間を生じることなく密着し、受け口１１内でシール部材１８が傾いたり、偏心するようなことが防止されている。また、シール部材１８の内周径ｄは、立主管３（差し口３Ａ）の外周径Ｄよりも大径に形成されており、該立主管３を挿入したときシール部材１８の内周面との間に隙間を生じるようになっている。
【００２０】
前記フランジ１５には、リング状に形成された押し輪（押圧部材）２４が仮止め状態で連結されている。
すなわち、前記押し輪２４は、フランジ１５側のボルト挿通孔１６に対応した複数のボルト挿通孔２５を有し、双方のボルト挿通孔１６，２５に連結ボルト２６を挿通するとともに該連結ボルト２６にナット２７を螺着しており、シール部材１８をほとんど圧縮しない状態で押し輪２４の上面（押圧面２４Ａ）を前記シール部材１８の下端面に接触することで、受け口１１からシール部材１８が離脱しないように、また、シール部材１８が傾斜しないように支持している。
【００２１】
なお、押し輪２４の上面には凹部２４Ｂが形成され、この凹部２４Ｂの底面がシール部材１８の下端面に接触する押圧面２４Ａとされている。
上記シール部材１８及び押し輪２４は、工場出荷時に予め受け口１１に装着した状態とするのが好ましいが、建設現場等において集合管２及び立主管３を配管する前に装着するものであってもよい。
上記構成の下連結管（一方の管）７に対して立主管（他方の管）３を連結する場合、当該下連結管７よりも一つ下の階床１から立主管３の差し口３Ａを受け口１１に挿入する。この際、シール部材１８の内周径ｄが立主管３の外周径Ｄよりも大径に形成されていることから、受け口１１から離れた下の階床からでも迅速且つ容易に立主管３を挿入することができ、労力が軽減される。
【００２２】
また、受け口１１の内周面にシール部材１８の外周面が密着していることから、立主管３の挿入の際に、その上端がシール部材１８に引っ掛かってこれを位置ずれさせたり、傷つけるようなことも防止でき、また、押し輪２４によってシール部材１８の下端面を保護することで立主管３の接触を可及的に防止している。
そして、立主管３を挿入したのち、連結ボルト２６及びナット２７を締め付けることにより、図２に示すように、押し輪２４をフランジ１５側へ管軸方向に移動し、シール部材１８を押圧、圧縮することによってその内周面を立主管３に密着させる。
【００２３】
この際、押し輪２４、ボルト２６及びナット２７は予めフランジ１５に装着されていることから、単に連結ボルト２６、ナット２７を締め付けるだけで連結が完了し、下の階から高所の作業となる締結作業が簡単に効率よく行えるようになっている。
また、シール部材１８の外周面は、予め受け口１１の内周面に密着していることから、押し輪２４でシール部材１８を圧縮した際に、該シール部材１８は内周側へ大きく膨出することとなり、立主管３に対する密着度が増してシール性の向上が図られている。更に、押し輪２４によりシール部材１８を上方へ圧縮すると、前記テーパー面１４による案内作用でシール部材１８が縮径し、これによってもシール性を向上できるようになっている。
【００２４】
なお、前記立主管３を交換等の目的で下連結管７から離脱する場合には、連結ボルト２６及びナット２７を外れない程度に緩めることにより、押し輪２４によるシール部材１８の圧縮を解除し、該シール部材１８の内周面と立主管３との間に隙間を生じさせることにより容易に立主管３を離脱できる。
また、上記実施形態において、シール部材１８の外周径は、受け口１１の内周径よりも若干小さく形成することも可能であり、この場合、管７，３の連結前の状態でも、押し輪２４によってシール部材１８を適正位置に保持可能であり、シール部材１８を圧縮することで受け口１１に密着させることが可能である。
【００２５】
図４は本発明の第２実施形態を示すものである。
本実施形態では、シール部材１８の薄肉部１９が、先端側（上端側）へいくに従い径方向内方に移行するように管軸方向に対して角度θだけ傾斜して設けられており、これによって、受け口１１への挿入側となる薄肉部１９の外周面が先細り状のテーパー面１９Ａに形成されたものとなっている。
また、シール部材１８を受け口１１に装着するときに該受け口１１の内周エッジ部分Ｘ１を通過するシール部材１８の外周エッジ部分Ｘ２、即ち、厚肉部２０の段部２２における外周エッジ部分Ｘ２には、アール又はテーパーの面取り部が形成され、立主管３の上端（差し口）３Ａの外周エッジ部分Ｘ３が通過する厚肉部２０の内周エッジ部分Ｘ４にもアール又はテーパーの面取り部が形成されている。
【００２６】
本実施形態においては、薄肉部１９の外周面をテーパー面１９Ａに形成することによって、シール部材１８を受け口１１に容易に挿入できるようになっており、更に、シール部材１８の外周エッジ部分Ｘ２及び内周エッジ部分Ｘ４に面取り部を形成することで、受け口１１及び差し口３Ａに対してシール部材１８が引っ掛かるようなことが防止されている。
なお、上記各面取り部は、半径２、３ｍｍ程度のアールに形成するのが好ましく、上記以外の他の構成については、上記第１実施形態と略同様であるため同一符合を付して詳細な説明を省略する。
【００２７】
ところで、上記立主管３は、鋼、鋳鉄、樹脂材等により形成されるものであり、特に、鋳鉄管の場合にはその外径寸法にバラツキ（誤差）を生じやすくなっている。
そのため、図７の従来技術で示したように、シール部材（パッキン３７）等を予め立主管（他方の管）３３に装着する構成であれば、該立主管の外径寸法が大きいほどシール部材の外径寸法も膨張して大きくなり、受け口に対する挿入が困難になるという問題が生じる。逆に、立主管の外径寸法が小さいとシール部材をしっかりと装着できなくなるため、該シール部材が傾いたり偏心したりして受け口との間のシール性を損なう恐れが生じる。
【００２８】
これに対し、上述した本発明では、シール部材１８の内径寸法が立主管３の外径寸法よりも大きくなるように設定され、且つシール部材１８が押し輪２４によって径内方向に膨張する構成であるために、シール部材１８の内径よりも小さい範囲であれば立主管３の外径寸法のバラツキにもある程度対応することが可能となっている。
本願出願人は、ある一定寸法のシール部材１８に適合する立主管３の外径寸法の誤差許容範囲を次のような実験によって確認した。
【００２９】
１．まず、一定寸法のシール部材１８を、内径寸法ｄ３（図４参照、以下同じ）の異なる４種の受け口１１に装着する。
この受け口１１は、内径寸法ｄ３がシール部材１８の外径（厚肉部の外径）寸法Ｄ１に対して−１ｍｍ、±０ｍｍ、＋１ｍｍ、＋２ｍｍとなる４種とする。
なお、受け口内径ｄ３の寸法公差は、（Ｄ１−１ｍｍ）≦ｄ３≦（Ｄ１＋１ｍｍ）である。
２．上記４種の各受け口１１に対して、それぞれ２種の押し輪２４を装着する。
【００３０】
この押し輪２４は、凹部２４Ｂの径ｄ４が、シール部材１８の外径寸法Ｄ１に対して＋１ｍｍ、＋２ｍｍとなる２種とする。
なお、押し輪２４の凹部径ｄ４の寸法公差は、（Ｄ１＋１ｍｍ）≦ｄ４≦（Ｄ１＋２ｍｍ）であり、実験には、このうち最大と最小の２種を使用する。
３．各受け口１１にシール部材１８、各押し輪２４を装着した状態で、外径寸法Ｄ２の異なる複数の立主管３をそれぞれ挿入し、ボルト２６及びナット２７を一定の締付けトルクで締結する。
【００３１】
そして、このときのフランジ１５と押し輪２４の間の寸法（図２にＴで示す）を計測する。
４．寸法Ｔが０より大きい場合（フランジ１５と押し輪２４とが当接しない場合）、その立主管３の外径寸法Ｄ２が一定寸法のシール部材１８に適合するものと判断する。
以上のような手法で、呼び径１００ｍｍの管３，７について寸法Ｔのデータを採取し、適合した条件をグラフ化したところ、図５に示すようになった。
【００３２】
実験に用いたシール部材１８、受け口１１、押し輪２４、立主管３（差し口３Ａ）は図４に示した形状のものであり、その各寸法は、図６に示すとおりである。
また、フランジ１５と押し輪２４の間の初期寸法（シール部材１８を圧縮しない状態での寸法）Ｔは１０ｍｍ（＝ｔ１−（ｔ４＋ｔ７））に設定されている。
なお、図５のグラフにおいて、寸法Ｔが０となった場合、及びシール部材１８に差し口３Ａを適正に挿入できなかった場合（シール部材１８の内径ｄ１に対して差し口３Ａの外径寸法Ｄ２が大きい場合）のデータは除外している。
【００３３】
図５に示すように、内径寸法ｄ３が寸法公差内の受け口Ａ〜Ｃ（シール部材１８の外径Ｄ１＝１３５ｍｍに対して内径ｄ３＝１３４〜１３６ｍｍの受け口Ａ〜Ｃ）にシール部材１８を装着したとき、そのシール部材１８の内径ｄ１＝１１７ｍｍに対し、差し口３Ａの外径寸法Ｄ２が１１２ｍｍ〜１１５ｍｍであれば、いずれの押し輪２４を用いた場合であっても隙間寸法Ｔが０以上となった。
すなわち、シール部材１８の内径ｄ１と差し口３Ａの外径Ｄ２との関係が、（ｄ１−５ｍｍ）≦Ｄ２≦（ｄ１−２ｍｍ）の範囲にあるときに、その差し口３Ａ（立主管３）を使用可能であることが判明した。
【００３４】
また、他の呼び径寸法の管３，７についても、上記の関係がほぼ成り立つものとなった。
また、受け口Ｂ〜Ｄ（内径寸法ｄ３＝１３５ｍｍ〜１３７ｍｍ）にシール部材１８を装着した場合には、外径寸法Ｄ２が１１３ｍｍ〜１１６ｍｍの差し口３Ａを使用可能であることが判明した。
すなわち、寸法公差外の受け口Ｄ（内径寸法ｄ３＝１３７ｍｍ）であっても、差し口３Ａの外径寸法Ｄ２によっては使用可能であり、この場合も、（ｄ１−４ｍｍ）≦Ｄ２≦（ｄ１−１ｍｍ）という広い寸法範囲の差し口３Ａを利用できることが判明した。
【００３５】
本発明は、上記実施形態に限らず適宜設計変更可能である。
例えば、本発明の継手構造が採用される箇所としては、集合管２の上連結管６と立主管３、横連結管８と横引き管４、また、立主管３等の直管同士の連結にも採用可能である。
また、シール部材１８としては、薄肉部１９を省略し、厚肉部２０のみの構成とすることができる。
テーパー面１９Ａは、上記実施形態のように薄肉部１９全体を径内方向に傾斜させるに限らず、薄肉部１９の外周面をテーパー状に除肉したものであってもよい。
【００３６】
【発明の効果】
以上詳述したように、本発明によれば、管相互の連結を簡単且つ迅速に行え、施工性の向上を図ることが可能となる。
【図面の簡単な説明】
【図１】本発明の第１実施形態に係る管継手の連結前状態を示す側断面図である。
【図２】同連結状態の側断面図である。
【図３】本発明の管継手が採用される建築物の配管構造を示す側面図である。
【図４】本発明の第２実施形態に係る管継手の分解状態を示す側面断面図である。
【図５】差し口の外径寸法とフランジ・押し輪間寸法との関係を示すグラフである。
【図６】実験に利用したシール部材、受け口、押し輪、差し口の各寸法データである。
【図７】従来の管継手の構造を示す側断面図である。
【符号の説明】
２集合管
３立主管（他方の管）
７下連結管（一方の管）
１１受け口
１８シール部材
２４押し輪（押圧部材）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for connecting pipe joints and a pipe joint structure.
[0002]
[Prior art]
The standing main pipe for drainage installed so as to penetrate each floor in high-rise buildings, etc., and the horizontal pipe connected to this standing main pipe are straight pipes of a predetermined length, straight pipes and collecting pipes, straight pipes and bent pipes However, in general, a flange joint structure as shown in FIG. 7 is used to connect these pipes.
In this joint structure, the end of one tube 30 is formed in a slightly large diameter receiving port 31 and a flange 32 protrudes from the outer periphery of the open end of the receiving port 31, whereas the other tube 33 has a receiving port. A push pipe (pressing member) 34, a lock ring 35, a collar 36, a packing 37, and the like are externally fitted in this order to the insertion end (lock ring 35). , The collar 36 may be omitted and only the push ring 34 and the packing 37 may be externally fitted in this order).
[0003]
And while inserting this other pipe | tube 33 in the said receiving port 31, the said flange 32 and the push ring 34 are couple | bonded with the some volt | bolt 38 and the nut 39, and by tightening this, packing 37 grade | etc., Is compressed, both The pipes 30 and 33 were connected to each other in a watertight manner.
[0004]
[Problems to be solved by the invention]
In the above joint structure, the packing 37, the push ring 34, etc. are preliminarily attached to the end of the other pipe 33, and the pipe 33 is inserted into the receiving port 31 of the one pipe 30 and then pressed with the flange 32. It is necessary to perform operations such as positioning of the bolt holes 40 and 41 of the ring 34, insertion of the bolt 38, and tightening of the nut 39.
Since these operations must be performed while maintaining the insertion state of the other pipe 33, the operations are extremely troublesome, and the workability as a whole is considerably deteriorated by repeatedly performing these operations on a plurality of bolts 38. It was a thing.
[0005]
In particular, in the connection between the upper end of the standing main pipe provided between the floors of the building and the receiving port on the lower side of the collecting pipe provided on each floor, the standing main pipe is connected from the lower floor to the collecting pipe on a certain floor. Therefore, if the above joint structure is adopted for this part, it will be a work at a high place from the lower floor and a work at a position approaching the upper floor. It was even more difficult.
Further, when the end of the other tube 33 is inserted into the receiving port 31 of one tube 30, the packing 37 or the like temporarily fixed to the other tube 33 may be inclined with respect to the receiving port 31. , 33 could also impair the sealing effect.
[0006]
Therefore, in view of the above circumstances, an object of the present invention is to provide a pipe joint connection method and pipe joint structure that can easily and quickly connect pipes to improve workability.
[0007]
[Means for Solving the Problems]
The present invention takes the following technical means to achieve the above object.
That is, the present invention is a method of connecting pipe joints for connecting the upper end of the standing main pipe 3 provided between the floors of the building and the receiving port 11 of the lower connecting pipe 7 at the lower part of the collecting pipe 2 provided on each floor. ,
Advance to the lower connecting pipe 7, the inner peripheral surface of the socket 11, the sealing member 18 to seal between the end portion outer peripheral surface of the standing main tube 3 is attached, and the seal member 18 to the receptacle 11 the aft wearing the temporary stop state pressing member 24 to be compressed in axial direction of the tube, is inserted to the riser main tube 3 relative thereafter the sealing member 18, compressing the seal member 18 by the pressing member 24 it makes is characterized in that the manner to connect both tubes 7,3 while sealed by a seal member 18.
[0008]
Moreover, it is the connection method of the pipe joint which connects the upper end of the standing main pipe 3 provided between each floor of a building, and the receptacle 11 of the lower connection pipe 7 of the lower part of the collection pipe 2 provided in each floor,
The lower connecting pipe 7 is previously sealed between the inner peripheral surface of the receiving port 11 and the outer peripheral surface of the end of the standing main tube 3, and the outer peripheral diameter before mounting is slightly larger than the inner peripheral diameter of the receiving port 11. A sealing member 18 formed in a diameter is attached to the inner periphery of the receiving port 11 in a pressed state due to its elasticity, and a pressing member 24 that compresses the sealing member 18 in the tube axis direction is temporarily fixed to the receiving port 11 After that, the standing main pipe 3 is inserted into the seal member 18, and the seal member 18 is compressed by the pressing member 24, whereby both pipes 7 and 3 are sealed by the seal member 18. It is characterized in that the connection is made in the state of being.
[0009]
Moreover, it is the connection method of the pipe joint which connects the upper end of the standing main pipe 3 provided between each floor of a building, and the receptacle 11 of the lower connection pipe 7 of the lower part of the collection pipe 2 provided in each floor,
The lower connecting pipe 7 is previously attached to the inner peripheral surface of the receiving port 11 in a cylindrical shape that seals between the end outer peripheral surface of the standing main pipe 3 and has a thin upper portion and a thick lower portion. the sealing member 18 outside diameter of the front is formed slightly larger diameter than the inner circumferential diameter of the socket 11, and attached to the inner periphery of the receiving opening 11 by its elasticity in pressed state, and the seal on the receptacle 11 A pressing member 24 that compresses the member 18 in the tube axis direction is mounted in a temporarily fixed state, and then the standing main pipe 3 is inserted into the sealing member 18 and the sealing member 18 is compressed by the pressing member 24. Thus, both the tubes 7 and 3 are connected in a state where they are sealed by the seal member 18.
[0010]
Moreover, it is the connection method of the pipe joint which connects the upper end of the standing main pipe 3 provided between each floor of a building, and the receptacle 11 of the lower connection pipe 7 of the lower part of the collection pipe 2 provided in each floor,
The lower connecting pipe 7 is previously attached to the inner peripheral surface of the receiving port 11 in a cylindrical shape that seals between the end outer peripheral surface of the standing main pipe 3 and has a thin upper portion and a thick lower portion. A sealing member 18 having a front outer diameter slightly larger than the inner peripheral diameter of the receiving port 11 is mounted in pressure contact with the inner periphery of the receiving port 11 due to its elasticity, and the sealing member is attached to the receiving port 11. A pressing member 24 that compresses in the tube axis direction in close contact so as to protect the lower end surface of 18 is attached in a temporarily fixed state, and then the standing main pipe 3 is inserted into the seal member 18, By compressing the sealing member 18 with the pressing member 24, both the pipes 7 and 3 are connected in a state of being sealed with the sealing member 18.
[0011]
In addition, a pipe joint structure for connecting the upper end of the standing main pipe 3 provided between the floors of the building and the receiving port 11 of the lower connection pipe 7 at the lower part of the collecting pipe 2 provided on each floor,
In a state before both the pipes 7 and 3 are connected, the lower connecting pipe 7 is provided with a seal member 18 that seals between the inner peripheral surface of the receiving port 11 and the outer peripheral surface of the end portion of the standing main pipe 3. In addition, a pressing member 24 that compresses the seal member 18 in the tube axis direction is attached to the receptacle 11 in a temporarily fixed state, and the standing main pipe 3 is inserted into the seal member 18 and the pressing member 24 is inserted. By compressing the sealing member 18, both the pipes 7 and 3 are connected in a state of being sealed by the sealing member 18.
[0012]
In addition, a pipe joint structure for connecting the upper end of the standing main pipe 3 provided between the floors of the building and the receiving port 11 of the lower connection pipe 7 at the lower part of the collecting pipe 2 provided on each floor,
In a state before both pipes 7 and 3 are connected, the lower connecting pipe 7 seals between the inner peripheral surface of the receiving port 11 and the outer peripheral surface of the end portion of the standing main pipe 3, and the upper side is thin and lower. A sealing member 18 having a cylindrical shape with a thick side and an outer peripheral diameter before mounting that is slightly larger than the inner peripheral diameter of the receiving port 11 is pressed against the inner periphery of the receiving port 11 by its elasticity. A pressing member 24 that is mounted and is compressed in the tube axis direction in close contact with the receiving port 11 so as to protect the lower end surface of the sealing member 18 is mounted in a temporarily fixed state. The vertical main pipe 3 is inserted and the seal member 18 is compressed by the pressing member 24 so that both the pipes 7 and 3 are connected in a state of being sealed by the seal member 18. It is.
[0013]
According to this, the seal member 18 and the pressing member 24 are mounted in advance on the receiving port 11 side of the lower connecting tube 7 before the connection of both the tubes 7 and 3, and from this state, the sealing member 18 on the receiving port 11 side. On the other hand, by inserting the end of the other tube 3 and compressing the seal member 18 by the pressing member 24, both the tubes 7 and 3 are connected.
Therefore, it is not necessary to perform the bolt hole alignment between the pressing member 24 and the flange and the bolt insertion work after the insertion of the other pipe 3 in the field work at the time of construction as in the prior art, and the pressing member 24 is immediately tightened. is possible to improve the workability and can do work such as, in particular, coupling operation by adopting the joint structure of the present invention in connection with the upper end of the receptacle 11 and Tatsunushi tube 3 lower connecting pipe 7 in the collecting pipe 2 The effort will be further reduced.
[0014]
Here, by setting the the pressing member 24 temporarily fixed state, can without hindrance insertion of Tatsunushi tube 3, also the end portion outer peripheral diameter of Tatsunushi tube 3, increasing the inner circumference of the seal member 18 do it formed, the insertion of Tatsunushi tube 3 should be able to more easily, even in this case, watertight both tubes 7,3 by the compression of the sealing member 18 by fastening the pressing member 24 is reliably maintained.
In the sealing member 18, it is preferable that the outer peripheral surface on the insertion side to the receiving port 11 is formed into a tapered surface that is tapered.
[0015]
As a result, the seal member 18 can be easily attached to the receiving port 11.
The relationship between the inner diameter d1 of the seal member 18 and the outer diameter D2 of the outlet 3A of the standing main pipe 3 is (d1-5 mm) ≦ D2 ≦ (d1-2 mm) or (d1-4 mm) ≦ D2 ≦ ( d1-1 mm) is preferably satisfied.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 3 shows a piping structure such as a drain pipe in a building, etc., a collecting pipe 2 is fixed to each floor slab 1 of this building, and a vertical main pipe 3 is connected to the upper and lower sides of the collecting pipe 2. A horizontal pulling pipe 4 is connected to the upper part of the collecting pipe 2.
The collecting pipe 2 includes a main body portion 5, upper and lower pipes 3 connected to the vertical main pipe 3, lower connecting pipes 6 and 7, and a horizontal connecting pipe 8 to which the horizontal pulling pipe 4 is connected. Thus, the main body 5 is inserted into a through hole 9 formed in each floor slab 1 and fixed by a mortar 10 or the like.
[0017]
The pipe joint structure according to the present invention is, for example, connected at an arrow A portion in FIG. 3, that is, between the lower connecting pipe (one pipe) 7 of the collecting pipe 2 and the upper end of the standing main pipe (the other pipe) 3. In FIG. 1 and FIG. 2 showing an enlarged view of this portion, the end of the lower connecting pipe 7 has a receiving port 11 opened downward, The standing main pipe 3 is a straight pipe, and its upper end (insert 3A) is inserted into the receiving port 11.
1 shows a state before the lower connecting pipe 7 and the standing main pipe 3 are connected, and FIG. 2 shows a state after the connection.
[0018]
In FIG. 1, the receiving port 11 is formed to have a slightly larger diameter through a step portion 12 so that the standing main pipe 3 can be inserted, and the inner periphery of the end portion of the large diameter portion 13 has an opening side (lower side). Side) has a tapered surface 14 that is widened. Further, a flange 15 protruding in the radially outward direction is integrally formed on the outer periphery of the end portion of the receiving port 11, and a plurality of bolt insertion holes 16 penetrating in the tube axis direction are provided in the flange 15 at a predetermined interval in the circumferential direction. Is formed.
A seal member 18 is mounted on the inner peripheral surface of the large-diameter portion 13 for watertight sealing with the outer peripheral surface of the standing main pipe 3. The sealing member 18 is formed in a cylindrical shape that can be fitted into the large-diameter portion 13 by synthetic rubber or the like. The upper portion is formed in the thin portion 19 and the lower portion is formed in the thick portion 20. A flange portion 21 protruding inward in the radial direction and superposed on the step portion 12 is integrally formed.
[0019]
Further, the inner peripheral surface of the sealing member 18 excluding the flange portion 21 is formed as a substantially straight flat surface having no irregularities, so that the outer periphery of the thick portion 20 passes through the step portion 22 with respect to the thin portion 19. The step portion 22 is formed on a tapered surface that is in surface contact with the tapered surface 14 of the receiving port 11. Further, the seal member 18 is mounted with its lower end protruding from the receiving port 11.
The outer diameter of the seal member 18 is slightly larger than the inner diameter of the receiving port 11, and the seal member 18 is in pressure contact with the inner periphery of the receiving port 11 due to its elasticity. Therefore, it adheres without generating a gap between the receiving port 11 and the seal member 18 is prevented from being inclined or decentered in the receiving port 11. Further, the inner peripheral diameter d of the seal member 18 is formed larger than the outer peripheral diameter D of the standing main pipe 3 (insert 3A), and when the standing main pipe 3 is inserted, the inner peripheral surface of the sealing member 18 A gap is created between the two.
[0020]
A pressing wheel (pressing member) 24 formed in a ring shape is connected to the flange 15 in a temporarily fixed state.
That is, the push ring 24 has a plurality of bolt insertion holes 25 corresponding to the bolt insertion holes 16 on the flange 15 side, and the connection bolts 26 are inserted into both the bolt insertion holes 16 and 25, and the connection bolts 26 are connected to the connection bolts 26. The nut 27 is screwed and the upper surface (pressing surface 24A) of the push ring 24 is brought into contact with the lower end surface of the sealing member 18 in a state where the sealing member 18 is hardly compressed. The seal member 18 is supported so as not to be inclined.
[0021]
A recess 24B is formed on the upper surface of the push ring 24, and the bottom surface of the recess 24B is a pressing surface 24A that contacts the lower end surface of the seal member 18.
The seal member 18 and the push ring 24 are preferably attached to the receiving port 11 in advance at the time of shipment from the factory, but may be attached before piping the collecting pipe 2 and the standing main pipe 3 at a construction site or the like. Good.
When connecting the standing main pipe (the other pipe) 3 to the lower connecting pipe (one pipe) 7 having the above-described configuration, the outlet 3A of the standing main pipe 3 from the floor 1 one lower than the lower connecting pipe 7 is provided. Insert into the receptacle 11. At this time, since the inner peripheral diameter d of the seal member 18 is formed larger than the outer peripheral diameter D of the standing main pipe 3, the standing main pipe 3 can be quickly and easily removed from the lower floor away from the receiving port 11. Can be inserted and labor is reduced.
[0022]
Further, since the outer peripheral surface of the seal member 18 is in close contact with the inner peripheral surface of the receiving port 11, when the standing main pipe 3 is inserted, its upper end is caught by the seal member 18 so that it is displaced or damaged. In addition, the lower end surface of the seal member 18 is protected by the push ring 24 to prevent the standing main pipe 3 from being contacted as much as possible.
Then, after inserting the standing main pipe 3, by tightening the connecting bolt 26 and the nut 27, as shown in FIG. 2, the push ring 24 is moved to the flange 15 side in the pipe axis direction, and the seal member 18 is pressed and compressed. By doing so, the inner peripheral surface is brought into close contact with the standing main pipe 3.
[0023]
At this time, since the push ring 24, the bolt 26, and the nut 27 are mounted on the flange 15 in advance, the connection is completed simply by tightening the connection bolt 26 and the nut 27, and the work is performed at a high place from the lower floor. Fastening work can be done easily and efficiently.
Further, since the outer peripheral surface of the seal member 18 is in close contact with the inner peripheral surface of the receiving port 11 in advance, when the seal member 18 is compressed by the push ring 24, the seal member 18 bulges greatly toward the inner peripheral side. As a result, the degree of adhesion to the standing main pipe 3 is increased and the sealing performance is improved. Further, when the sealing member 18 is compressed upward by the push ring 24, the diameter of the sealing member 18 is reduced by the guide action by the tapered surface 14, and thus the sealing performance can be improved.
[0024]
When the standing main pipe 3 is detached from the lower connecting pipe 7 for the purpose of replacement or the like, the compression of the seal member 18 by the push ring 24 is released by loosening the connecting bolt 26 and the nut 27 so as not to be detached. The standing main pipe 3 can be easily detached by creating a gap between the inner peripheral surface of the seal member 18 and the standing main pipe 3.
In the above embodiment, the outer peripheral diameter of the seal member 18 can be formed to be slightly smaller than the inner peripheral diameter of the receiving port 11. In this case, even in a state before the pipes 7 and 3 are connected, the push ring 24 is used. Thus, the sealing member 18 can be held at an appropriate position, and the sealing member 18 can be compressed and brought into close contact with the receiving port 11.
[0025]
FIG. 4 shows a second embodiment of the present invention.
In the present embodiment, the thin portion 19 of the seal member 18 is provided to be inclined by an angle θ with respect to the tube axis direction so as to move radially inward as it goes to the distal end side (upper end side). Thus, the outer peripheral surface of the thin portion 19 on the insertion side to the receiving port 11 is formed into a tapered surface 19A.
Further, when the seal member 18 is attached to the receiving port 11, the outer peripheral edge portion X 2 of the seal member 18 that passes through the inner peripheral edge portion X 1 of the receiving port 11, that is, the outer peripheral edge portion X 2 of the step portion 22 of the thick portion 20. A rounded or tapered chamfered portion is formed, and a rounded or tapered chamfered portion is also formed at the inner peripheral edge portion X4 of the thick portion 20 through which the outer peripheral edge portion X3 of the upper end (inlet) 3A of the standing main pipe 3 passes. Has been.
[0026]
In the present embodiment, by forming the outer peripheral surface of the thin portion 19 into the tapered surface 19A, the seal member 18 can be easily inserted into the receiving port 11, and the outer peripheral edge portion X2 of the seal member 18 and By forming the chamfered portion on the inner peripheral edge portion X4, the sealing member 18 is prevented from being caught by the receiving port 11 and the insertion port 3A.
Each of the chamfered portions is preferably formed in a rounded shape having a radius of about 2 or 3 mm, and the configuration other than the above is substantially the same as that of the first embodiment, and thus the same reference numerals are given and detailed. Description is omitted.
[0027]
By the way, the standing main pipe 3 is formed of steel, cast iron, a resin material or the like, and in particular, in the case of a cast iron pipe, variation (error) in the outer diameter is likely to occur.
Therefore, as shown in the prior art of FIG. 7, if the seal member (packing 37) or the like is mounted in advance on the standing main pipe (the other pipe) 33, the larger the outer diameter of the standing main pipe, the larger the sealing member. As a result, the outer diameter of the tube also expands and becomes large, which makes it difficult to insert into the receiving port. Conversely, if the outer diameter of the standing main pipe is small, the seal member cannot be securely attached, and the seal member may be inclined or decentered, which may impair the sealing performance with the receiving port.
[0028]
On the other hand, in the present invention described above, the inner diameter dimension of the seal member 18 is set to be larger than the outer diameter dimension of the standing main pipe 3, and the seal member 18 is expanded inwardly by the push ring 24. For this reason, as long as it is in a range smaller than the inner diameter of the seal member 18, it is possible to cope with variations in the outer diameter of the standing main pipe 3 to some extent.
The applicant of the present application confirmed the allowable error range of the outer diameter of the standing main pipe 3 that fits the seal member 18 having a certain size by the following experiment.
[0029]
1. First, the seal member 18 having a fixed size is attached to four types of receiving ports 11 having different inner diameters d3 (see FIG. 4, the same applies hereinafter).
The receiving port 11 has four types in which the inner diameter dimension d3 is −1 mm, ± 0 mm, +1 mm, and +2 mm with respect to the outer diameter (outer diameter of the thick portion) dimension D1 of the seal member 18.
The dimensional tolerance of the receiving hole inner diameter d3 is (D1-1 mm) ≦ d3 ≦ (D1 + 1 mm).
2. Two types of push wheels 24 are attached to each of the four types of receiving ports 11.
[0030]
The push ring 24 is of two types in which the diameter d4 of the recess 24B is +1 mm and +2 mm with respect to the outer diameter D1 of the seal member 18.
The dimensional tolerance of the concave diameter d4 of the push wheel 24 is (D1 + 1 mm) ≦ d4 ≦ (D1 + 2 mm), and the maximum and minimum two types are used in the experiment.
3. A plurality of standing main pipes 3 having different outer diameters D2 are inserted in a state where the seal members 18 and the push wheels 24 are mounted in the respective receiving ports 11, and the bolts 26 and the nuts 27 are fastened with a constant tightening torque.
[0031]
And the dimension (it shows with T in FIG. 2) between the flange 15 and the push ring 24 at this time is measured.
4). When the dimension T is larger than 0 (when the flange 15 and the push ring 24 do not contact), it is determined that the outer diameter dimension D2 of the standing main pipe 3 is suitable for the seal member 18 having a certain dimension.
With the above-described method, data of the dimension T was collected for the tubes 3 and 7 having a nominal diameter of 100 mm, and the conforming conditions were graphed, and the result was as shown in FIG.
[0032]
The seal member 18, the receiving port 11, the push ring 24, and the standing main pipe 3 (insert 3 </ b> A) used in the experiment have the shapes shown in FIG. 4, and the dimensions thereof are as shown in FIG. 6.
The initial dimension between the flange 15 and the push ring 24 (the dimension when the seal member 18 is not compressed) T is set to 10 mm (= t1− (t4 + t7)).
In the graph of FIG. 5, when the dimension T becomes 0 and when the insertion slot 3A cannot be properly inserted into the seal member 18 (the outer diameter dimension of the insertion slot 3A with respect to the inner diameter d1 of the seal member 18). The data of (when D2 is large) is excluded.
[0033]
As shown in FIG. 5, the seal member 18 is mounted on the receiving ports A to C whose inner diameter dimension d3 is within the dimensional tolerance (the receiving ports A to C having the inner diameter d3 = 134 to 136 mm with respect to the outer diameter D1 = 135 mm of the seal member 18). When the outer diameter D2 of the insertion port 3A is 112 mm to 115 mm with respect to the inner diameter d1 = 117 mm of the seal member 18, the gap dimension T is 0 or more regardless of which push ring 24 is used. It became.
That is, when the relationship between the inner diameter d1 of the seal member 18 and the outer diameter D2 of the insertion opening 3A is in the range of (d1-5 mm) ≦ D2 ≦ (d1-2 mm), the insertion opening 3A (stand main pipe 3). Was found to be usable.
[0034]
In addition, the above relationship is substantially established for the pipes 3 and 7 having other nominal diameters.
Further, it has been found that when the seal member 18 is attached to the receiving openings B to D (inner diameter dimension d3 = 135 mm to 137 mm), the insertion opening 3A having an outer diameter dimension D2 of 113 mm to 116 mm can be used.
That is, even if the receiving hole D (inner diameter dimension d3 = 137 mm) is outside the dimensional tolerance, it can be used depending on the outer diameter dimension D2 of the insertion opening 3A. In this case, too, (d1-4 mm) ≦ D2 ≦ (d1− It has been found that a slot 3A having a wide size range of 1 mm) can be used.
[0035]
The present invention is not limited to the above-described embodiment, and the design can be changed as appropriate.
For example, the joint structure of the present invention may be used as a connection between straight pipes such as the upper connecting pipe 6 and the standing main pipe 3, the horizontal connecting pipe 8 and the horizontal pulling pipe 4, and the standing main pipe 3. It can also be adopted.
Further, as the sealing member 18, the thin portion 19 can be omitted and only the thick portion 20 can be configured.
The tapered surface 19 </ b> A is not limited to inclining the entire thin portion 19 in the radially inward direction as in the above embodiment, but may be a taper-shaped outer peripheral surface of the thin portion 19.
[0036]
【The invention's effect】
As described above in detail, according to the present invention, the pipes can be easily and quickly connected to each other, and the workability can be improved.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a state before connection of a pipe joint according to a first embodiment of the present invention.
FIG. 2 is a side sectional view of the connected state.
FIG. 3 is a side view showing a building piping structure in which the pipe joint of the present invention is employed.
FIG. 4 is a side sectional view showing an exploded state of a pipe joint according to a second embodiment of the present invention.
FIG. 5 is a graph showing the relationship between the outer diameter dimension of the slot and the dimension between the flange and the push ring.
FIG. 6 is each dimension data of a seal member, a receiving port, a push ring, and an insertion port used in the experiment.
FIG. 7 is a side sectional view showing the structure of a conventional pipe joint.
[Explanation of symbols]
2 Collecting pipe 3 Standing pipe (the other pipe)
7 Lower connecting pipe (one pipe)
11 Receiving port 18 Sealing member 24 Push ring (pressing member)

Claims

In the connection method of the pipe joint which connects the upper end of the standing main pipe (3) provided between each floor of the building and the receiving port (11) of the lower connection pipe (7) below the collecting pipe (2) provided on each floor There,
The previously said lower connecting tube (7), the inner peripheral surface of the socket (11), fitted with a sealing member (18) to seal between the end portion outer peripheral surface of the standing main tube (3), and aft wearing the pressing member (24) for compressing said seal member (18) in the axial direction of the tube the the receptacle (11) in a temporarily fixed state, the riser main tube relative Thereafter the seal member (18) It is inserted (3) by compressing the sealing member (18) by the pressing member (24), was set to be connected in a state sealed by a seal member both tubes (7,3) (18) A method for connecting pipe joints.

In the connection method of the pipe joint which connects the upper end of the standing main pipe (3) provided between each floor of the building and the receiving port (11) of the lower connection pipe (7) below the collecting pipe (2) provided on each floor There,
The lower connecting pipe (7) is previously sealed between the inner peripheral surface of the receiving port (11) and the outer peripheral surface of the end of the standing main pipe (3), and the outer peripheral diameter before mounting is the receiving port (11). A sealing member (18) formed to have a diameter slightly larger than the inner peripheral diameter of the sealing member is attached to the inner periphery of the receiving port (11) in a pressed state by its elasticity, and the sealing member (18) is inserted into the receiving port (11). A pressing member (24) for compressing 18) in the tube axis direction is mounted in a temporarily fixed state, and then the standing main pipe (3) is inserted into the sealing member (18) and the pressing member ( by compressing the seal member (18) by 24), connecting method of the pipe joint you characterized in that the manner to connect while sealed by a seal member both tubes (7,3) (18).

In the connection method of the pipe joint which connects the upper end of the standing main pipe (3) provided between each floor of the building and the receiving port (11) of the lower connection pipe (7) below the collecting pipe (2) provided on each floor There,
The lower connecting pipe (7) is previously sealed between the inner peripheral surface of the receiving port (11) and the outer peripheral surface of the end of the standing main pipe (3), and the upper side is thin and the lower side is thick. The sealing member (18), which is cylindrical and has an outer diameter before mounting that is slightly larger than the inner diameter of the receiving port (11), is brought into pressure contact with the inner periphery of the receiving port (11) due to its elasticity. And a pressing member (24) for compressing the seal member (18) in the tube axial direction is mounted in the receiving port (11) in a temporarily fixed state, and then, against the seal member (18). While inserting the standing main pipe (3) and compressing the seal member (18) by the pressing member (24), both pipes (7, 3) are connected in a state sealed by the seal member (18). connecting method of the pipe joint you characterized in that the like.

In the connection method of the pipe joint which connects the upper end of the standing main pipe (3) provided between each floor of the building and the receiving port (11) of the lower connection pipe (7) below the collecting pipe (2) provided on each floor There,
The lower connecting pipe (7) is previously sealed between the inner peripheral surface of the receiving port (11) and the outer peripheral surface of the end of the standing main pipe (3), and the upper side is thin and the lower side is thick. The sealing member (18), which is cylindrical and has an outer diameter before mounting that is slightly larger than the inner diameter of the receiving port (11), is brought into pressure contact with the inner periphery of the receiving port (11) due to its elasticity. And a pressing member (24) that compresses in the tube axis direction in close contact with the receiving port (11) so as to protect the lower end surface of the sealing member (18), and is mounted in a temporarily fixed state. Thereafter, the standing main pipe (3) is inserted into the seal member (18), and the seal member (18) is compressed by the pressing member (24) to seal both pipes (7, 3). characterized in that the manner for coupling while the sealing of a member (18) Method of connecting pipe fittings you.

The standing main tube (3) than the end outside diameter of the pipe joint according to any one of claims 1 to 4, it is characterized in that the inner circumference of the seal member (18) is larger Concatenation method.

The outer peripheral surface on the insertion side to the receiving port (11) in the seal member (18) is formed in a tapered surface that is tapered, 6. How to connect pipe fittings.

It is a pipe joint structure for connecting the upper end of a standing main pipe (3) provided between the floors of a building and the receiving port (11) of the lower connecting pipe (7) at the lower part of the collecting pipe (2) provided on each floor. ,
In a state before the connection of both pipes (7, 3), the lower connection pipe (7) is located between the inner peripheral surface of the receiving port (11) and the outer peripheral surface of the end portion of the standing main pipe (3). A sealing member (18) for sealing is attached, and a pressing member (24) for compressing the sealing member (18) in the tube axis direction is attached to the receiving port (11) in a temporarily fixed state, and the sealing member ( 18) Insert the standing main pipe (3) into the pipe 18 and compress the seal member (18) with the pressing member (24), thereby sealing both pipes (7, 3) with the seal member (18). A pipe joint structure, characterized in that it is configured to be connected in a connected state.

It is a pipe joint structure for connecting the upper end of a standing main pipe (3) provided between the floors of a building and the receiving port (11) of the lower connecting pipe (7) at the lower part of the collecting pipe (2) provided on each floor. ,
In a state before the connection of both pipes (7, 3), the lower connection pipe (7) is located between the inner peripheral surface of the receiving port (11) and the outer peripheral surface of the end portion of the standing main pipe (3). A sealing member (18) that is sealed and has a cylindrical shape with a thin upper part and a thicker lower part, and has an outer peripheral diameter before mounting slightly larger than the inner peripheral diameter of the receiving port (11). A pressing member that is elastically attached to the inner periphery of the receiving port (11) and compresses in the tube axis direction in close contact with the receiving port (11) so as to protect the lower end surface of the seal member (18). (24) is mounted in a temporarily fixed state, and the standing main pipe (3) is inserted into the seal member (18), and the seal member (18) is compressed by the pressing member (24). Both pipes (7, 3) are sealed with a sealing member (18) Pipe joint structure characterized by being configured to be coupled.

The relationship between the inner diameter (d1) of the seal member (18) and the outer diameter (D2) of the outlet (3A) of the standing main pipe (3) is (d1-5 mm) ≦ D2 ≦ (d1-2 mm) or ( 9. The pipe joint structure according to claim 7 or 8, wherein d1-4 mm) ≦ D2 ≦ (d1-1 mm) is satisfied.