JP4464617B2

JP4464617B2 - Connection structure of water supply / drainage pipe and pipe trap and S trap using the connection structure

Info

Publication number: JP4464617B2
Application number: JP2003066587A
Authority: JP
Inventors: 育實太田; 素朗水谷
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-03-12
Filing date: 2003-03-12
Publication date: 2010-05-19
Anticipated expiration: 2023-03-12
Also published as: JP2004278001A

Description

【０００１】
【発明の属する技術分野】
本発明は、給排水管の接続構造及びその接続構造を使用した洗面台、流し台等の排水装置の管トラップ、Ｓトラップに関するものである。
【０００２】
【従来技術】
旧来から建築物の水回りである排水管や給水管の接続構造は、管端部周面に螺刻したネジに、Ｏリングを介在した状態で袋ナット等のナット部材で接続する方法が主流を占めている（例えば特許文献１参照）。
【０００３】
【特許文献１】
特開平９−１３４５２号公報（第２頁、第３図）
【０００４】
ところで、袋ナット方式の場合、部品点数が多くなり、高コストになる。
また、Ｏリングで止水力を持たせると、そのＯリングに止水力と管の抜け力とが作用することから、Ｏリングに大きな負担がかかり、耐久性の劣化が早急になる問題があった。
更に、管に曲げモーメントが作用すると、弾性変形性が劣るため、その曲げ方向の変形に追随できずに隙間を作り止水性を悪くしたり、その曲げモーメントを吸収できずに管同士の接続部に無理な負荷を掛け、接続部の耐久性を低下させる問題もあった。
【０００５】
また、Ｏリングを介して管同士を接続する構造としては、排水管や給水管の接続、詳細には、管同士を接続する例えば洗面台、流し台等の管トラップを構成する上部管部、下部管部等の接続もある。その内、Ｓトラップは、洗面台、流し台等の容体の排水管に接続される上部管部と、その上部管部に接続される下部管部とで構成しているが、その下部管部は、上部管部と一体なフレキシブル管や、別体なフレキシブル管で構成するタイプが主流を占め、そのフレキシブル管の可撓性で床下排水管との位置ズレ（芯ズレ）を吸収して同管に接続される。
ところで、住宅の品質確保等の促進に関する法律に基づく日本住宅性能表示基準の設計要綱（平成１２年度）で、トラップと床下排水管との接続はフレキシブル管を使用してはならない。とする衛生面、安全性の両面から遵守させる特記事項が追加されている。
フレキシブル管は、汚物が付着し易い形状で不衛生。経年変化でクラックが発生し漏水する。等が改定要因である。
尚、実際面として注文住宅等で家主の希望で建築躯体（壁）から柱等が出っ張り、それを避けるべくオフセットして洗面台、流し台等を設置した場合には、前記するフレキシブル管を介してでないと床下排水管と接続できないケースもある。
【０００６】
【発明が解決しようとする課題】
本発明は上記従来事情に鑑みてなされたもので、その目的とする処は、コスト高を招かず優れた止水性と耐久性を持続する構造簡単な給排水管の接続構造を提供することにある。
他の目的とする処は、前述する日本住宅性能表示基準の設計要綱に合致するＳトラップを提供することである。
更に他の目的とする処は、床下排水管との大きな位置ズレ（芯ズレ）を吸収して接続するＳトラップを提供することである。
【０００７】
【課題を解決するための手段】
上記目的を達成するために講じた技術手段は、樹脂製の管同士の先端部分を互いに嵌め合わせることによって管相互を回動可能に接続する給排水管の接続構造であって、一方の管の先端部分の外側に他方の管の先端部分の内側が嵌合係止される接続部は、その内側の管に、管本体径より小径な細径部が先端部分に形成されると共に該細径部の外周に環状係止用爪部が形成され、前記細径部の基端側断面と前記環状係止用爪部の立面との間に被嵌合用管部を構成し、その外側の管に、最先端部分に前記被嵌合用管部に嵌合係止される嵌合係止管部を周設すると共に該嵌合係止管部とは逆側に環状収容部を挟んで前記細径部の外径と同径の内径を有する嵌合管部を連設形成して、前記被嵌合用管部に前記嵌合係止管部が嵌合した状態で前記管同士を回転可能で且つ嵌脱不能に接続しており、前記嵌合係止管部は、その先端部分に環状案内用ガイド部を形成して、前記環状係止用爪部の斜面を前記環状案内用ガイド部が乗り越えて、前記被嵌合用管部に前記嵌合係止管部が嵌合係止され、前記環状収容部は、前記外側の管の前記嵌合係止管部と前記嵌合管部との間を外側に膨出して形成され、その内部に前記外側の管の内周面と前記内側の管の外周面に亘って水密状に密接する環状シール材が嵌装されていることを特徴とする。
【０００８】
この手段によれば、止水性は環状収容部に嵌装される環状シール材で保持され、管相互に発生する抜け力は管端部同士を回動可能に接続する係止部で環状シール材に負荷を掛けることなく受圧して、環状シール材の耐久性を耐用期まで維持させる。
【０００９】
また、前記管としては、インジェクション成形法ばかりでなく、複雑形状である場合が多い。その際、複雑形状に成形に適したブロー成形法、光造形法や、真空成形後張り合わせ、加熱後に外力を加えて変形させる等の適宜な成形方法で成形される。それら成形方法では、成形寸法にバラツキが出たり、管の同士の同軸度が低くなったり、嵌合部の芯ずれ等が発生し、Ｏリングでは所定の止水性を期待できないことがある。そのため、本発明では、ラジアル方向への弾性変形性に優れた所要断面形状を呈する環状シール材を使用して対処している（請求項２）。即ち、ラジアル方向への弾性範囲が広い形状、例えば、縦断面視山形、Ｖ形、Ｕ形、蛇腹形等に形成して、成形寸法のバラツキを吸収して、所定の止水性を発揮するようにしている。
この環状シール材は、環状収容部内の空間及び各構成片部間の空間を利用してその構成片部がラジアル方向に弾性範囲が大きな前記縦断面視形態であれば、前記例示に限定されるものではないものであるし、その縦断面視形態の形状性と、環状収容部からの突出量の設定によって、ラジアル方向への弾性範囲、即ち管の成形寸法のバラツキを吸収して、所定の止水性を発揮することも可能である。
【００１０】
そして、双方の管が管トラップの一方を構成する上部管部と、その上部管部に回動可能に接続されて他方を構成する下部管部であったり（請求項３）、特に双方の管がＳトラップを構成するものであり、一方の管が排水管に接続される上部管部、他方の管がその上部管部に回動可能に接続される下部管部であり、前記下部管部は、その出口中心を前記上部管部との接続部の中心に対して変位させてなり、該下部管部の上部管部に対する回動機能と上部管部の排水管に対する回動機能とで床下排水管との位置ズレ（芯ズレ）に対応してその下部管部を床下排水管に接続する構成にした場合、より有効なものである（請求項４）。
前記のような接続部として回動可能な接続方式を採用すると、上部管部に対する回動機能と上部管部の排水管に対する回動機能とで床下排水管との位置ズレ（芯ズレ）に対応して下部管部を床下排水管に接続することができる（請求項４）。
【００１１】
【発明の実施の形態】
次に、本発明給排水管の接続構造を説明すると、図１〜図８は、その接続構造を使用したＳトラップの場合を、図９、図１０は、他の管トラップの場合を各々示している。
このＳトラップＡは、図２で示す通り、洗面器、流し等の容体１００の底に接続され最低部にドレン部１１を有する排水管１に本体２を接続して構成されている。
本体２は、上部管部１２と、中途部に水平管部もしくは下向き傾斜管部２２ｃを有する下部管部２２とを備え、相互に周方向に回動可能に接続されている。本実施の形態では、排水管１に対する上部管部１２の接続部（本発明の実施の形態ではない）Ｊ１は、角パッキン３を介して袋ナット４で水密状に締結して接続されている（図２参照）。
【００１２】
また、その上部管部１２と下部管部２２との接続部（本発明の実施の形態）Ｊ２は、嵌合方式で周方向に回動可能に接続される構成になっている。
以下、上部管部１２を、図２〜図４に示すように嵌合方式で接続する際、その接続部Ｊ２において内側に位置するため内側の管、下部管部２２を、外側に位置するため外側の管と称して説明する。
【００１３】
内側の管１２、外側の管２２は各々ブロー成形品であり、そして内側の管（上部管部）１２は、先端部分をその本体径よりも若干小径な細管部１２ａで形成すると共に、その細管部１２ａの基端部寄りに直角三角形状の環状係止用爪部１２ｂを一体成形して、その基端部の段面１２ａ−１と環状係止用爪部１２ｂの立面１２ｂ−１との間に被嵌合用管部１２ｃを構成し、最先端部分に先窄み部１２ｄを一体に連設形成させてある。
【００１４】
一方、外側の管（下部管部）２２は、最先端部分に前記被嵌合用管部に１２ｃに嵌合係止される嵌合係止管部２２ａを周設すると共に、嵌合係止管部２２ａとは逆側に環状収容部５を挟んで同径の嵌合管部２２ｂを連設形成している。
【００１５】
前記嵌合係止管部２２ａは、図３、図４に示すようにその先端部分にラッパ状の環状案内用ガイド部２２ａ−１を形成して、環状係止用爪部１２ｂの斜面１２ｂ−２を乗り越えてスムース且つ堅固に前記被嵌合用管部１２ｃに嵌合係止するように構成されている。
そして、前記する被嵌合用筒部１２ｃと、環状係止用爪部１２ｂと、嵌合係止管部２２ａ、嵌合管部２２ｂとは、内側の管１２、外側の管２２を嵌合方式で接続した際、管同士を回動可能で且つ嵌脱不能に接続する係止部６を構成している（図３参照）。
【００１６】
また、前記する環状収容部５は、本実施の形態では外側の管２２の前記する嵌合係止管部２２ａ、嵌合管部２２ｂとの間を外側に膨出して形成され、その内部に外側の管２２の内周面、内側の管１２の外周面全周に亘って水密状に密接する環状シール材Ｓが嵌装されている。
【００１７】
前記環状シール材Ｓは、ラジアル方向への弾性変形性に優れた所要断面形状に形成されている。
本実施の形態では、図３に示すように縦断面視山形状、詳細には縦断面視横向山形状を呈してなり、上下の両凹状斜面Ｓ２、Ｓ２の端部が環状収容部５のコーナーに丁度突き当たるように配置され、その状態で頂部Ｓ１が下部管部（外側の管）１２の前記嵌合係止管部２２ａ、嵌合管部２２ｂ内周面レベルよりも所要量突出する大きさに形成されており、予め環状収容部５に嵌装した状態で上部管部（内側の管）１２と、下部管部（外側の管）２２とが嵌合方式で接続されると、上部管部（内側の管）１２で両凹状斜面Ｓ２、Ｓ２をラジアル方向（放射方向）に開脚するように弾性変形させて、下部管部（外側の管）２２の内周面、上部管部（内側の管）１２の外周面全周に亘って水密状に密接するようになっている。
【００１８】
以上のように構成された給排水管の接続構造を使用したＳトラップＡでは、図２に示すように上部管部（内側の管）１２と下部管部（外側の管）２２とを嵌合方式で接続すると、上部管部（内側の管）１２の被嵌合用管部１２ｃに下部管部（外側の管）２２の嵌合係止筒部２２ａが回動可能で且つ嵌脱不能となり、それと同時に下部管部（外側の管）２２の内周面と上部管部（内側の管）１２の外周面全周に亘って環状シール材Ｓが密接するように弾性変形される。
従って、上部管部（内側の管）１２と下部管部（外側の管）２２を嵌合方式で接続するだけで、回動可能で且つ嵌脱不能な状態で上部管部（内側の管）１２と下部管部（外側の管）２２とを接続し、上部管部（内側の管）１２の細管部１２ａの外周面に弾性変形して密接する環状シール材Ｓで止水性を保持し、外し力が作用してもその環状シール材Ｓに負荷をかけず、安定した止水性を持続する。
【００１９】
図５は、本実施の形態のＳトラップの正面図であり、ブロー成形で上部管部１２と下部管部２２とを一体成形し、中間部の円錐台形状の筒部３２を切除することによって成形されており、製造コストも非常に安価である。
【００２０】
前記する下向き傾斜管部２２ｃは、下部管部２２の中途部に水平線に対して６０度以下の範囲の角度をもって所望長さをもって形成されており、この下向き傾斜管部２２ｃの下端に鉛直管部２２ｄを連設して接続部Ｊ２に対してその鉛直管部２２ｄを変位させて床下排水管２００に接続する構成になっている。
【００２１】
前記鉛直管部２２ｄと床下排水管２００との接続は、前記接続部Ｊ１と同様な角パッキンを介して袋ナットで接続する構成を採用したり、ゴム製のカップリングのような管継手で気密性と止水性とを発揮する構成で行われている。
また、前記する接続部Ｊ１の接続構造を、接続部Ｊ２の構造に変更すること自由である。
尚、施工現場では、洗面台、流し台等のキャビネットＫの底板Ｋ１に予め開孔してある大径孔Ｋ２を利用して鉛直管部２２ｄと床下排水管２００とを接続したり、その孔が開孔されていない場合には、その場で連絡孔を開孔して接続に対処する。符号Ｋ３は、被蓋である。
【００２２】
図７、図８は、各々環状シール材Ｓの他の実施の形態を示している。
図７の環状シール材Ｓは、前記する環状シール材Ｓの頂部Ｓ１に、内側の管１２の嵌合時にその外周面に沿うように弾性変形してその外周面に密接する鰭部Ｓ３を一体成形した縦断面視形状になっている。
また、図８は、前記する環状シール材Ｓのその頂部Ｓ１に山形部Ｓ’１、Ｓ’１、Ｓ’１を連続して複数列有する縦断面視形状にして、内側の管１２の嵌合時にその外周面に各山形部Ｓ’１、Ｓ’１、Ｓ’１が弾性的に密接するようになっている。
【００２３】
【実施例１】
図６は、ＳトラップＡの調整範囲を示している。
即ち、このＳトラップＡは、管内径を２８ｍｍとし、外側の管である下部管部２２の中途部を傾斜角度（α）３０度の下向き傾斜管部２２ｃで構成することによって、本体２最下端部を構成する鉛直管部２２ｄが内側の管である上部管部１２との接続部Ｊ２の中心に対して半径（ｒ１）を２８ｍｍとする範囲で回動可能とし、また、本体２が排水管１との接続部Ｊ１の中心に対して半径（ｒ２）７６ｍｍの範囲で向きを調整する構成になっている（図２、図６参照）。
従って、この実施例によると、半径（ｒ２）７６ｍｍと半径（ｒ１）２８ｍｍの計１０４ｍｍの半径で描かれる可動範囲であって、排水管１と干渉されない範囲全てが床下排水管２００との接続用の調整範囲（斜線範囲）として有効利用される。
【００２４】
図９、図１０は、本発明管トラップを示し、洗面器、流し等の容体に接続される上部管部１２、他方がその上部管部１２に対して回動可能に接続される下部管部２２で構成されている。
この上部管部１２と下部管部２２との接続部Ｊ２にも本発明の接続構造を使用している。
この実施の形態において、洗面器、流し等の容体から垂設する排水管に上部管部を接続する接続部にも本発明の接続構造を使用すること任意である。
【００２５】
【発明の効果】
本発明は以上のように構成した給排水管の接続構造であり、止水性を環状収容部に嵌装される環状シール材で維持し、管の抜け力は、管端部同士を回動可能に接続する係止部で前記環状シール材に負荷を掛けることなく受圧して、環状シール材と係止部とで止水性と抜け防止性とを分担しているから、環状シール材による耐水性を低下させることなく、一方の管に対して他方の管を回動可能な状態で水密状に接続することができる。
【００２６】
しかも、環状シール材が、ラジアル方向への弾性変形性に優れた所要断面形状、外側に両凹状斜面を有すると共に内側に頂部を有する縦断面視横向山形状を呈しており、前記環状収容部に嵌装された状態で前記内側の管と前記外側の管とが接続されると、前記内側の管で前記両凹状斜面をラジアル方向に開脚するように弾性変形させ、前記外側の管の内周面と前記内側の管の外周面全周に亘って水密状に密接するようになっているので、その環状シール材の形状の特殊性で、例えばブロー成形法等の管の成形寸法にバラツキが出る方法で製造され、管の肉厚が一定しない場合や、管同士の同軸度が低く芯ズレする場合等であっても環状シール材の優れた弾性変形性で両管間を確実に止水し、優れた水密性を発揮することができるし、管の一方に曲げモーメントが作用してもその弾性変形性で吸収するので、隙間が空いたり、接続部に無理な負荷が掛って耐久性が低下するようなことがない（請求項２）。
【００２７】
また、請求項４にあっては、日本住宅性能表示基準の設計要綱に合致するＳトラップを提供することができる。
しかも、洗面器、シンク等の収容キャビネット内の収容物で曲げモーメント（外力）を受けても、接続部における環状シール材の優れたラジアル方向への弾性変形性で対応してＳトラップの弾性変形を許容し、Ｓトラップの耐久性が低下したり、止水性を損なう虞れもない。
また、双方の管がＳトラップを構成するものであり、一方の管が排水管に水平方向に回動可能に接続される上部管部、他方の管が下部管部であり、前記下部管部は、その出口中心を前記上部管部との接続部の中心に対して変位させているため、排水管との接続部を中心とする半径距離が描く平面視範囲と、下部管部が、上部管部との接続部を中心とする半径距離が描く平面視範囲において、排水管が干渉しない範囲全てが床下排水管との接続用の調整範囲として利用可能となり、例えば注文住宅のように個々で設計が異なり、洗面台、流し台の設置位置をズラさざるをえない場合でも、即応して床下排水管と接続する自在性を具備することができる。
【図面の簡単な説明】
【図１】給排水管の接続構造を使用したＳトラップの斜視図。
【図２】使用状態を示す正面図で一部切欠して示す。
【図３】嵌合方式で接続される上部管部（内側の管）、下部管部（外側の管）の要部の拡大断面図。
【図４】上部管部（内側の管）、下部管部（外側の管）、環状シール材の分解斜視図で一部切欠して示す。
【図５】ブロー成形した本体の正面図。
【図６】図２の（６）−（６）線拡大断面図で、下部管部の調整範囲を示している。
【図７】他の実施の形態の環状シール材を使用して接続される上部管部（内側の管）、下部管部（外側の管）の要部の拡大断面図。
【図８】更に他の実施の形態の環状シール材を使用して接続される上部管部（内側の管）、下部管部（外側の管）の要部の拡大断面図。
【図９】給排水管の接続構造を使用した管トラップの正面図で概略的に示す。
【図１０】同給排水管の接続構造を使用した管トラップの正面図で概略的に示す。
【符号の説明】
２２：外側の管（管、下部管部）１２：内側の管（管、上部管部）
Ｓ：環状シール材６：係止部
５：環状収容部１：排水管
２００：床下排水管[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connection structure for a water supply / drainage pipe, a pipe trap for a drainage device such as a wash basin and a sink using the connection structure, and an S trap.
[0002]
[Prior art]
Traditionally, the connection structure for drainage pipes and water supply pipes around the water of buildings is mainly connected to nuts such as cap nuts with screws threaded on the peripheral surface of the pipe end with an O-ring interposed. (See, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-13352 (page 2, FIG. 3)
[0004]
By the way, in the case of the cap nut method, the number of parts increases and the cost increases.
In addition, if the O-ring has a water-stopping force, the water-stopping force and the pulling-out force of the tube act on the O-ring, so that there is a problem that a large burden is applied to the O-ring and the durability deteriorates quickly. .
Furthermore, if a bending moment acts on the pipe, the elastic deformability is inferior, so it is impossible to follow the deformation in the bending direction, creating a gap and worsening the water stoppage, or absorbing the bending moment and connecting the pipes to each other. There was also a problem that an excessive load was applied to the connection part and the durability of the connection part was lowered.
[0005]
In addition, as a structure for connecting pipes through an O-ring, connection of drain pipes and water supply pipes, specifically, an upper pipe part that constitutes a pipe trap such as a wash basin and a sink that connects the pipes, a lower part There are also connections such as pipes. Among them, the S trap is composed of an upper pipe part connected to a drainage pipe of a container such as a wash basin and a sink, and a lower pipe part connected to the upper pipe part. The type composed of a flexible pipe integrated with the upper pipe part or a separate flexible pipe occupies the mainstream, and the flexibility of the flexible pipe absorbs misalignment (core misalignment) with the underfloor drain pipe. Connected to.
By the way, according to the Japanese House Performance Labeling Standard Design Guidelines (2000) based on the Act on Promotion of Housing Quality Assurance, the flexible pipe must not be used for the connection between the trap and the underfloor drain pipe. Special notes to be observed from both the hygiene and safety aspects are added.
Flexible pipes are unsanitary due to the shape of dirt. Cracks occur due to aging and water leaks. Etc. are the revision factors.
In addition, in the case of a custom-built house etc. as an actual surface, a pillar etc. protrudes from the building frame (wall) at the request of the landlord, and when a wash basin, sink, etc. are installed offset to avoid it, the above-mentioned flexible pipe is used. Otherwise, there are cases where it cannot be connected to the drainage pipe under the floor.
[0006]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described conventional circumstances, and an object of the present invention is to provide a connection structure for a simple water supply / drainage pipe that maintains high water stoppage and durability without incurring high costs. .
Another objective is to provide an S-trap that meets the design guidelines of the Japanese housing performance display standards described above.
Yet another object is to provide an S-trap that absorbs and connects a large misalignment (core misalignment) with the underfloor drain pipe.
[0007]
[Means for Solving the Problems]
The technical means taken in order to achieve the above object is a connection structure of a water supply / drainage pipe for connecting the pipes to each other in a rotatable manner by fitting the tip parts of resin pipes to each other, and the tip of one pipe The connecting portion in which the inside of the tip end portion of the other tube is fitted and locked to the outside of the portion is formed with a small diameter portion at the tip portion of the inner tube, which is smaller than the tube main body diameter. An annular locking claw portion is formed on the outer periphery of the tube, and a fitting tube portion is formed between the proximal side cross section of the small diameter portion and the vertical surface of the annular locking claw portion, and the outer tube In addition, a fitting locking tube portion that is fitted and locked to the fitting tube portion is provided around the foremost portion, and the thin accommodating portion is sandwiched between the annular holding portion on the opposite side of the fitting locking tube portion. A fitting tube portion having an inner diameter that is the same diameter as the outer diameter of the diameter portion is formed continuously, and the tubes are connected to each other in a state where the fitting locking tube portion is fitted to the fitting tube portion. The fitting locking tube portion is formed so as to be rotatable and non-detachable, and an annular guiding guide portion is formed at a tip portion of the fitting locking tube portion, and an inclined surface of the annular locking claw portion is used for the annular guiding. When the guide portion gets over, the fitting locking tube portion is fitted and locked to the fitting tube portion, and the annular housing portion includes the fitting locking tube portion and the fitting tube of the outer tube. An annular sealing material that is formed in such a manner as to bulge outward between the inner and outer portions, and that is in close contact with the inner peripheral surface of the outer tube and the outer peripheral surface of the inner tube in a watertight manner. It is characterized by.
[0008]
According to this means, the water-stopping property is held by the annular sealing material fitted in the annular accommodating portion, and the withdrawal force generated between the tubes is the annular sealing material at the locking portion that connects the tube end portions so as to be rotatable. The pressure is received without imposing a load on the ring, and the durability of the annular sealing material is maintained until the service life.
[0009]
In addition, the tube is often not only an injection molding method but also has a complicated shape. In that case, it is shape | molded by appropriate shaping | molding methods, such as a blow molding method suitable for shaping | molding in a complicated shape, an optical shaping method, pasting after vacuum forming, and deform | transforming by applying external force after a heating. In these molding methods, variations in molding dimensions occur, the degree of coaxiality between the tubes decreases, misalignment of the fitting portion occurs, and the O-ring may not be able to be expected to have a predetermined water stoppage. For this reason, in the present invention, this is dealt with by using an annular sealing material having a required cross-sectional shape excellent in elastic deformation in the radial direction (claim 2). That is, it is formed into a shape having a wide elastic range in the radial direction, for example, a mountain shape in a longitudinal section, a V shape, a U shape, a bellows shape, etc., so as to absorb variation in molding dimensions and exhibit a predetermined water stoppage. I have to.
This annular sealing material is limited to the above examples as long as the configuration piece portion has a large elastic range in the radial direction using the space in the annular housing portion and the space between the configuration piece portions. The shape of the longitudinal sectional view and the setting of the amount of protrusion from the annular housing portion absorb the elastic range in the radial direction, that is, the variation in the molding size of the tube, and It is also possible to exert water-stopping properties.
[0010]
And both pipes are an upper pipe part that constitutes one of the pipe traps and a lower pipe part that is rotatably connected to the upper pipe part and constitutes the other (Claim 3). Constitutes an S trap, one pipe being an upper pipe part connected to a drain pipe, and the other pipe being a lower pipe part pivotally connected to the upper pipe part, the lower pipe part The center of the outlet is displaced with respect to the center of the connection portion with the upper pipe portion, and the lower pipe portion has a turning function with respect to the upper pipe portion and a turning function with respect to the drain pipe of the upper pipe portion. It is more effective when the lower pipe portion is connected to the underfloor drain pipe corresponding to the positional deviation (core deviation) with the drain pipe (claim 4).
When the pivotable connection method is adopted as the connection part as described above, the pivoting function with respect to the upper pipe part and the pivoting function with respect to the drain pipe of the upper pipe part correspond to the misalignment (core misalignment) with the underfloor drain pipe. Thus, the lower pipe part can be connected to the underfloor drain pipe (claim 4).
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, the connection structure of the water supply / drainage pipe of the present invention will be described. FIGS. 1 to 8 show the case of an S trap using the connection structure, and FIGS. 9 and 10 show the case of another pipe trap. Yes.
As shown in FIG. 2, the S trap A is configured by connecting the main body 2 to a drain pipe 1 connected to the bottom of a container 100 such as a basin and a sink and having a drain part 11 at the lowest part.
The main body 2 includes an upper tube portion 12 and a lower tube portion 22 having a horizontal tube portion or a downward inclined tube portion 22c in the middle, and are connected to each other so as to be rotatable in the circumferential direction. In the present embodiment, a connection portion (not an embodiment of the present invention) J1 of the upper pipe portion 12 with respect to the drain pipe 1 is connected in a watertight manner with a cap nut 4 via a square packing 3. (See FIG. 2).
[0012]
Moreover, the connection part (embodiment of this invention) J2 of the upper pipe part 12 and the lower pipe part 22 is the structure connected so that rotation in the circumferential direction is possible by a fitting system.
Hereinafter, when the upper pipe portion 12 is connected by the fitting method as shown in FIGS. 2 to 4, the inner pipe and the lower pipe portion 22 are located outside because the inner pipe is located at the connection portion J2. This will be described as an outer tube.
[0013]
The inner tube 12 and the outer tube 22 are each a blow-molded product, and the inner tube (upper tube portion) 12 is formed with a narrow tube portion 12a having a tip portion slightly smaller in diameter than the main body diameter, and the narrow tube. An annular locking claw portion 12b having a right triangle shape is integrally formed near the proximal end portion of the portion 12a, and a step surface 12a-1 of the proximal end portion and an upright surface 12b-1 of the annular locking claw portion 12b Between them, a tube portion 12c to be fitted is formed, and a tapered portion 12d is integrally formed continuously at the most distal end portion.
[0014]
On the other hand, the outer tube (lower tube portion) 22 is provided with a fitting locking tube portion 22a that is fitted and locked to the fitting tube portion 12c around the fitting tube portion, and a fitting locking tube. A fitting tube portion 22b having the same diameter is formed continuously on the opposite side of the portion 22a with the annular housing portion 5 interposed therebetween.
[0015]
As shown in FIGS. 3 and 4, the fitting locking tube portion 22a is formed with a trumpet-shaped annular guide portion 22a-1 at the tip thereof, and the inclined surface 12b- of the annular locking claw portion 12b. It is constructed so that it can be smoothly fitted and locked to the fitted pipe portion 12c over 2.
And the above-mentioned to-be-fitted cylinder portion 12c, the annular locking claw portion 12b, the fitting locking tube portion 22a, and the fitting tube portion 22b are a method of fitting the inner tube 12 and the outer tube 22 together. When connecting by, it has the latching | locking part 6 which connects pipes so that rotation is possible, and it cannot attach / detach (refer FIG. 3).
[0016]
In addition, in the present embodiment, the annular housing portion 5 is formed by bulging outward between the fitting locking tube portion 22a and the fitting tube portion 22b of the outer tube 22, and is formed in the inside thereof. An annular sealing material S is fitted over the inner peripheral surface of the outer tube 22 and the entire outer peripheral surface of the inner tube 12 in a watertight manner.
[0017]
The said annular sealing material S is formed in the required cross-sectional shape excellent in the elastic deformation property to a radial direction.
In the present embodiment, as shown in FIG. 3, it has a vertical cross-sectional mountain shape, specifically, a vertical cross-sectional mountain shape, and the end portions of the upper and lower biconcave slopes S <b> 2 and S <b> 2 are corners of the annular housing portion 5. In such a state, the top portion S1 protrudes by a required amount from the inner peripheral surface level of the fitting locking tube portion 22a and the fitting tube portion 22b of the lower tube portion (outer tube) 12. When the upper tube portion (inner tube) 12 and the lower tube portion (outer tube) 22 are connected to each other in a state of being fitted in the annular housing 5 in advance, the upper tube The biconcave slopes S2 and S2 are elastically deformed so as to open in the radial direction (radial direction) by the portion (inner tube) 12, and the inner peripheral surface of the lower tube portion (outer tube) 22 and the upper tube portion ( The inner tube) 12 is in close water-tight contact with the entire outer peripheral surface.
[0018]
In the S trap A using the connection structure of the water supply / drainage pipe constructed as described above, the upper pipe part (inner pipe) 12 and the lower pipe part (outer pipe) 22 are fitted as shown in FIG. , The fitting tube portion 22a of the lower tube portion (outer tube) 22 can rotate and cannot be removed from the fitting tube portion 12c of the upper tube portion (inner tube) 12. At the same time, the annular sealing material S is elastically deformed so as to be in close contact with the inner peripheral surface of the lower tube portion (outer tube) 22 and the entire outer peripheral surface of the upper tube portion (inner tube) 12.
Therefore, the upper tube portion (inner tube) can be rotated and cannot be detached only by connecting the upper tube portion (inner tube) 12 and the lower tube portion (outer tube) 22 by a fitting method. 12 and the lower pipe part (outer pipe) 22 are connected, and the water tightness is maintained by the annular sealing material S that is elastically deformed and in close contact with the outer peripheral surface of the thin pipe part 12a of the upper pipe part (inner pipe) 12; Even if the detachment force is applied, a load is not applied to the annular sealing material S, and a stable water-stopping property is maintained.
[0019]
FIG. 5 is a front view of the S trap of the present embodiment, in which the upper tube portion 12 and the lower tube portion 22 are integrally formed by blow molding, and the intermediate frustoconical cylindrical portion 32 is cut off. It is molded and the manufacturing cost is very low.
[0020]
The downward inclined pipe part 22c is formed with a desired length at an angle in a range of 60 degrees or less with respect to the horizontal line in the middle part of the lower pipe part 22, and a vertical pipe part is formed at the lower end of the downward inclined pipe part 22c. 22d is connected and the vertical pipe part 22d is displaced with respect to the connection part J2 to connect to the underfloor drain pipe 200.
[0021]
The vertical pipe portion 22d and the underfloor drain pipe 200 are connected with a cap nut via a square packing similar to the connection portion J1, or a pipe joint such as a rubber coupling is airtight. It is carried out in a configuration that exhibits both properties and waterstop.
Moreover, it is free to change the connection structure of the connection part J1 described above to the structure of the connection part J2.
At the construction site, the vertical pipe portion 22d and the underfloor drain pipe 200 are connected using a large-diameter hole K2 previously opened in the bottom plate K1 of the cabinet K such as a wash basin, a sink, or the like. If it is not opened, a connection hole is opened on the spot to cope with the connection. Reference sign K3 is a cover.
[0022]
7 and 8 show other embodiments of the annular sealing material S, respectively.
The annular sealing material S of FIG. 7 is integrally formed with the top portion S1 of the annular sealing material S described above when the inner tube 12 is fitted, and the flange portion S3 which is elastically deformed along the outer peripheral surface and is in close contact with the outer peripheral surface. It has a molded longitudinal sectional view.
FIG. 8 is a longitudinal sectional view having a plurality of continuous chevron portions S ′ 1, S ′ 1, S ′ 1 at the top portion S 1 of the annular sealing material S described above, and fitting the inner tube 12. At the time, each chevron S′1, S′1, S′1 is elastically in close contact with the outer peripheral surface.
[0023]
[Example 1]
FIG. 6 shows the adjustment range of the S trap A.
That is, the S trap A has a tube inner diameter of 28 mm, and a midway portion of the lower tube portion 22 that is an outer tube is formed by a downward inclined tube portion 22c having an inclination angle (α) of 30 degrees, whereby The vertical pipe part 22d constituting the part can be rotated within a range in which the radius (r1) is 28 mm with respect to the center of the connection part J2 with the upper pipe part 12 which is an inner pipe, and the main body 2 is a drain pipe. The orientation is adjusted in the range of radius (r2) 76 mm with respect to the center of the connecting portion J1 with 1 (see FIGS. 2 and 6).
Therefore, according to this embodiment, the movable range drawn with a radius of 104 mm in total of radius (r2) 76 mm and radius (r1) 28 mm, and the entire range not interfering with the drainage pipe 1 is for connection with the underfloor drainage pipe 200. It is effectively used as the adjustment range (shaded area).
[0024]
9 and 10 show the pipe trap of the present invention, an upper pipe part 12 connected to a container such as a basin, a sink, etc., and a lower pipe part whose other is connected to the upper pipe part 12 so as to be rotatable. 22 is comprised.
The connection structure of the present invention is also used for the connection portion J2 between the upper tube portion 12 and the lower tube portion 22.
In this embodiment, it is optional to use the connection structure of the present invention also for a connection part for connecting the upper pipe part to a drain pipe suspended from a container such as a basin or a sink.
[0025]
【The invention's effect】
The present invention is a connection structure for a water supply / drainage pipe configured as described above, maintaining water-stopping performance with an annular sealing material fitted in an annular housing portion, and the tube pull-out force can be rotated between tube ends. Since the engaging portion to be connected receives pressure without applying a load to the annular sealing material, the annular sealing material and the engaging portion share the water-stopping property and the slip-off preventing property. Without lowering, the other tube can be connected to one tube in a watertight manner in a rotatable state.
[0026]
In addition, the annular sealing material has a required cross-sectional shape excellent in elastic deformation in the radial direction, a bilaterally inclined slope on the outer side, and a transverse mountain shape in a vertical cross-sectional view having a top portion on the inner side. When the inner tube and the outer tube are connected in the fitted state, the inner tube is elastically deformed so as to open the biconcave slope in the radial direction, and the inner tube Since the circumferential surface and the entire outer peripheral surface of the inner tube are in close contact with each other in a watertight manner, the shape of the annular seal material varies, for example, in the tube molding dimensions such as blow molding. Even if the tube thickness is not constant, or when the coaxiality of the tubes is low and the cores are misaligned, the annular seal material can securely stop between the two tubes. Water and can demonstrate excellent watertightness, and one side of the tube Since the bending moment is absorbed by the elastic deformability also act, or vacant gaps, no such thing as durability is lowered takes an unreasonable load to the connecting portion (claim 2).
[0027]
Further, in claim 4, it is possible to provide an S trap that conforms to the design outline of the Japanese house performance display standard.
In addition, even when a bending moment (external force) is applied to the contents in the storage cabinet such as a wash basin and a sink, the elastic deformation of the S trap corresponding to the excellent radial deformability of the annular sealing material in the connection portion. , And there is no fear that the durability of the S trap will be lowered or the water stoppage will be impaired.
In addition, both pipes constitute an S trap, one pipe is connected to a drain pipe so as to be pivotable in the horizontal direction, and the other pipe is a lower pipe portion, the lower pipe portion Since the center of the outlet is displaced with respect to the center of the connection part with the upper pipe part, the plan view range drawn by the radial distance centered on the connection part with the drain pipe, and the lower pipe part is the upper part. In the plan view range drawn by the radial distance centered on the connection part with the pipe part, the entire area where the drain pipe does not interfere can be used as the adjustment range for connection with the underfloor drain pipe, for example, individually like a custom house Even if the design is different and the installation position of the washstand and sink must be shifted, it is possible to provide the flexibility to connect to the underfloor drain pipe immediately.
[Brief description of the drawings]
FIG. 1 is a perspective view of an S trap using a connection structure of water supply / drainage pipes.
FIG. 2 is a partially cutaway front view showing a use state.
FIG. 3 is an enlarged cross-sectional view of a main part of an upper pipe part (inner pipe) and a lower pipe part (outer pipe) connected by a fitting method.
FIG. 4 is an exploded perspective view of an upper tube portion (inner tube), a lower tube portion (outer tube), and an annular seal material, partially cut away.
FIG. 5 is a front view of a blow molded main body.
6 is an enlarged cross-sectional view taken along line (6)-(6) in FIG. 2, and shows an adjustment range of the lower pipe portion.
FIG. 7 is an enlarged cross-sectional view of a main part of an upper pipe part (inner pipe) and a lower pipe part (outer pipe) that are connected by using the annular sealing material according to another embodiment.
FIG. 8 is an enlarged cross-sectional view of a main part of an upper pipe part (inner pipe) and a lower pipe part (outer pipe) that are connected using an annular sealing material according to still another embodiment.
FIG. 9 schematically shows a front view of a pipe trap using a connection structure for water supply and drainage pipes.
FIG. 10 schematically shows a front view of a pipe trap using the connection structure of the water supply and drain pipe.
[Explanation of symbols]
22: Outer pipe (pipe, lower pipe) 12: Inner pipe (pipe, upper pipe)
S: Annular seal material 6: Locking part 5: Annular housing part 1: Drainage pipe 200: Underfloor drainage pipe

Claims

It is a connection structure of a water supply / drainage pipe that connects the pipes to each other by fitting the tip portions of the resin pipes together,
The connecting portion in which the inside of the tip end portion of the other tube is fitted and locked to the outside of the tip end portion of one tube is formed with a narrow-diameter portion smaller than the diameter of the tube main body at the tip end portion of the inside tube. In addition, an annular locking claw portion is formed on the outer periphery of the small-diameter portion, and a fitting tube portion is formed between the proximal end side cross-section of the small-diameter portion and the vertical surface of the annular locking claw portion. The outer tube is provided with a fitting locking tube portion fitted and locked to the fitting tube portion at the most distal portion and an annular housing portion on the opposite side of the fitting locking tube portion. A fitting tube portion having an inner diameter that is the same as the outer diameter of the small-diameter portion is continuously formed with the fitting tube portion being fitted to the fitting tube portion. They are connected to each other so that they can rotate and cannot be removed.
The fitting locking tube portion is formed with an annular guiding guide portion at a distal end portion thereof, and the annular guiding guide portion climbs over the inclined surface of the annular locking claw portion to be fitted to the fitting tube portion. The fitting locking tube portion is fitted and locked,
The annular housing part is formed by bulging outward between the fitting locking pipe part and the fitting pipe part of the outer pipe, and an inner peripheral surface of the outer pipe and the inner side are formed therein. A connection structure for a water supply / drainage pipe, wherein an annular sealing material that is in close contact with the water tightness is fitted over the outer peripheral surface of the pipe .

The annular sealing material has a bilaterally inclined shape having a biconcave slope on the outside and a top on the inside, and the inner tube and the outer tube in a state of being fitted in the annular housing portion. Are connected to each other, the inner pipe is elastically deformed so as to open the biconcave slopes in the radial direction, and the inner circumference of the outer pipe and the entire outer circumference of the inner pipe are extended. 2. The connection structure for a water supply / drainage pipe according to claim 1, wherein the connection structure is watertight .

The said both pipe | tube is the upper pipe part which comprises one side of a pipe trap, and the lower pipe part which is connected to the upper pipe part so that rotation is possible, and comprises the other. Pipe trap using connection structure of water supply / drainage pipe.

Both the pipes constitute an S trap, one pipe is an upper pipe part connected to a drain pipe, and the other pipe is a lower pipe part rotatably connected to the upper pipe part, The lower pipe part has its outlet center displaced with respect to the center of the connection part with the upper pipe part. The lower pipe part rotates with respect to the upper pipe part and the upper pipe part rotates with respect to the drain pipe. The lower pipe part is connected to the underfloor drain pipe corresponding to the positional deviation (core misalignment) with the underfloor drain pipe in terms of function. trap.