JP4813699B2

JP4813699B2 - Connection structure and waterproof flexible joint

Info

Publication number: JP4813699B2
Application number: JP2001216407A
Authority: JP
Inventors: 秀夫田中; 文夫門田; 英明高橋
Original assignee: NIHON STEP INDUSTRY CO., LTD; Hayakawa Rubber Co Ltd
Current assignee: NIHON STEP INDUSTRY CO., LTD; Hayakawa Rubber Co Ltd
Priority date: 2001-07-17
Filing date: 2001-07-17
Publication date: 2011-11-09
Anticipated expiration: 2021-07-17
Also published as: JP2003028374A

Description

【０００１】
【発明の属する技術分野】
本発明は、リブ付き管と取付管の接続構造に関するものであり、特に地中に埋設されたリブ付き管を取付管と接続するための止水可とう継手に関するものである。
【０００２】
【従来の技術】
下水道管きょには、塩化ビニル管、鉄筋コンクリート管、陶管等が用いられている。かかる管きょは、地中に埋設され、住宅、オフィスビル、工場等からの排水を処理場に集める役割を担っている。
【０００３】
近年、下水道管きょの整備には、リブ付きの硬質塩化ビニル管の採用が増えてきている。かかるリブ付き管は、耐荷力、軽量性に優れ、砕石基礎にも適用することができる。
【０００４】
リブ付き管と取付管との接続には、硬質塩ビ製継手が用いられている。図１１（ａ）は従来例の接続構造を正面から見た部分断面図であり、図１１（ｂ）は図１１（ａ）の接続構造の側面図である。図１２（ａ）は従来例の継手を正面から見た部分断面図であり、図１２（ｂ）は図１２（ａ）の継手を側面から見た部分断面図である。
【０００５】
図１１及び１２に示すように、従来の接続構造５１では、リブ付き管２と取付管３とが継手５２によって接続されている。継手５２は、リブ付き管２と同材質の硬質塩化ビニルで成型されている。継手５２の鞍部５３はリブ付き管２のリブ２ｂが収まるリブ受け溝５４を有する。
【０００６】
リブ付き管２と取付管３の接続は、図１２に示すように、鞍部５３の裏面に２液反応型のエポキシ系接着剤５５を塗布し、番線５６で締め付ける。この際、リブ２ｂとリブ受け溝５４との隙間を接着剤５５の充填及びシールによって塞ぐのが一般的である。なお、取付管３と継手５２との間は、ゴム輪５７によって水密にする。
【０００７】
【発明が解決しようとする課題】
しかし、かかる接続構造では、硬質塩化ビニル系の継手は可とう性がなく、リブ受け溝とリブとを正確に位置決めする必要がある。かかる定型の溝付き継手はリブ付き管の穿孔部周辺のリブに正確に合わなければ使用できず、リブ付き管の穿孔作業及び位置決め作業に多大な注意及び熟練を要する。
【０００８】
また、かかる接続構造では、エポキシ系接着剤の硬化後に剛性の接続構造が形成される。さらに、エポキシ系接着剤は、主剤と硬化剤を現地で混合し塗布するが、充分に硬化するまで、取付管の接合作業や埋め戻し作業ができない。
【０００９】
このように、従来の接続構造は、硬質塩化ビニル系の継手をエポキシ系接着剤で接合しているため可とう性がない。かかる接続構造は、リブ付き管と取付管の相対的位置関係が埋め戻し後の不同沈下や地震等により変化すると、継手部に応力が集中するため、エポキシ系接着剤に剥離が生じる場合がある。かかる剥離は漏水や不明水の浸入の原因となる。
【００１０】
本発明の課題は、リブ付き管と取付管とを可とう性を有する継手で連結し、不同沈下や地震等により生じる取付管とリブ付き管の相対的位置関係の変位を可とう性継手の弾性変形によって吸収させるのはもちろんのこと、リブ付き管と取付管との間に応力がかかっても可とう性継手とリブとの間で十分な水密性が発揮される継手構造を得ることである。
【００１１】
【課題を解決するための手段】
本発明は、リブ付き管と取付管と止水可とう継手とを備えており、前記リブ付き管の接続孔と前記取付管とが前記止水可とう継手によって接続されている接続構造であって、前記止水可とう継手が、可とう性の継手本体と板状の止水部材と剛性の押えカバーと締結バンドとを有しており、前記継手本体が、前記取付管の外周に密着する筒状部と、前記筒状部から外方向に突出し前記接続孔の周囲のリブ上に張り出すサドル部とを有しており、前記止水部材が、前記接続孔を取り囲むように前記サドル部の下側に設けられ、前記リブ付き管に接する面にリブ用溝を有し、前記リブが前記リブ用溝に埋め込まれ、前記サドル部と前記リブ付き管との間が水密に密閉されており、前記止水部材が５以下のゴム硬度（タイプＡデュロメータ）の加硫又は硬化させた軟質ゴム系材料からなり、前記押えカバーが前記サドル部の外面に設けられており、前記押えカバーと締結バンド及び両者を繋ぐ連結ボルトが前記サドル部及び前記止水部材を前記リブ付き管に押えつけており、前記止水部材が圧縮変形し前記リブを埋め込んでおり、前記サドル部と前記リブ付き管との間が水密に密閉されていることを特徴とする接続構造、及びかかる接続構造を得るための止水可とう継手に係るものである。
【００１２】
本発明は、リブ付き管と取付管とを可とう継手によって接続するに際し、所定の板状止水部材をリブ付き管のリブ形状に密接させ可とう継手本体のサドル部とリブ付き管との間を水密に密閉することによって、得られる接続構造が著しく優れた水密性を発揮するという知見に基づくものである。
【００１３】
本発明者は、リブ付き管と取付管との間で十分な水密性を得るため、種々の接続構造を試作し検討した。
【００１４】
その結果、本発明者は、リブ付き管と取付管とを可とう継手を用いて接続する場合、リブ付き管の接続孔部が非常に複雑な形状を有し、しかも環状のリブが継手と管との密着を妨げるため、充分な止水性を得ることができないことを見出した。
【００１５】
かかる知見の下、本発明者は、接続孔部を水密に密閉すべく、更に種々の接続構造を試作し詳細に検討した。
【００１６】
その結果、本発明者は、リブ付き管と取付管を接続する際、板状の止水部材をリブ付き管の接続孔部の外側周辺部に密着させ、この止水部材にリブを食い込ませることにより、接続孔部の良好な水密性が得られることを見出した。
【００１７】
さらに、本発明者は、板状の止水部材をゴム硬度０〜５（タイプＡデュロメータ）の軟質ゴム系材料から形成し、かかる止水部材を圧縮変形させることで、止水部材がリブに絡み付き、可とう性の継手本体のサドル部とリブ付き管との間で著しく優れた水密性が得られることを突き止め、本発明を完成させた。
【００１８】
本発明者の検討によれば、止水部材が加硫ゴム成型品の場合、加硫ゴム成型品の通常の硬度〔４０〜８０のゴム硬度（タイプＡデュロメータ）〕では硬過ぎることが分かった。かかる硬い止水部材は、リブに密接させるためのリブ用溝が必要であり、リブ用溝の配置等、止水部材の製品自体及びリブに極めて高い寸法精度が要求されることが分かった。
【００１９】
また、かかる硬い止水部材は、現場取付作業でリブに完全に密接させることは事実上困難であり、固定バンド等で締め付けても圧縮変形せず、継手本体のサドル部とリブ付き管との間を水密に密閉する効果は期待できなかった。
【００２０】
さらに、加硫ゴム成型品に水と接すると膨張する水膨張性機能を付与したものは、膨張するまでの初期の段階に漏水が発生し、この時点で土や砂等が侵入して貯まり、水道（みずみち）が形成され、水膨張しても地下水等の侵入を防げない欠点があった。
【００２１】
本発明の接続構造によれば、可とう性の継手本体がリブ付き管と取付管との間の相対的位置関係の変位を吸収し、板状の止水部材が接続孔周辺のリブに密着して継手本体のサドル部とリブ付き管との間が水密に密閉されるので、不同沈下や地震等によって継手部に応力がかかっても著しく優れた水密性を発揮する。
【００２２】
【発明の実施の形態】
本発明の実施の形態を説明する。
（１）接続構造
本発明の接続構造は、リブ付き管と取付管とを備えており、リブ付き管の接続孔と取付管とが止水可とう継手によって接続されている接続構造である。かかる接続構造は、下水道管の接続に限られず、種々の用途の管を接続する場合に用いることができる。
【００２３】
（２）リブ付き管
本発明にかかるリブ付き管は種々の形状、材質のものを用いることができる。リブは、管の周方向に形成される環状のもの、管の長さ方向に形成される筋状のもの、格子状のもの等、種々に形成されたものでよい。
【００２４】
（２−１）接続孔
かかるリブ付き管は接続孔を有している。かかる接続孔はリブ付き管と取付管とを連通させるものである。かかる接続孔は、取付管やリブ付き管の大きさ及び強度、接続の用途等によって種々の形状又は構造の孔とすることができる。
【００２５】
かかる接続孔は穿孔でよく、かかる穿孔は、現場又は工場で適切な穿孔機を用いてリブ付き管に穴あけすることによって形成することができる。
【００２６】
（３）取付管
本発明にかかる取付管は種々の形状、材質のものを用いることができる。かかる取付管は、リブ付き管が本管であり取付管が枝管である場合を想定している。但し、本発明では、取付管が本管であり、リブ付き管が枝管であってもよい。
【００２７】
かかる取付管には、前述のようなリブ付き管を用いることもできる。取付管としてリブ付き管を用いる場合には、継手本体の筒状部と取付管との間に、後述するような本発明にかかる板状の止水部材を設けて、筒状部と取付管との間に十分な水密性を得る必要がある。
【００２８】
（４）止水可とう継手
本発明にかかる止水可とう継手はリブ付き管の接続孔と取付管とを水密に接続する。かかる止水可とう継手は、可とう性の継手本体と、板状の止水部材と、剛性の押えカバーとを有する。
【００２９】
（５）可とう性の継手本体
かかる継手本体は、取付管の外周に密着する筒状部と、筒状部から外方向に突出し接続孔の周囲のリブ上に張り出すサドル部とを有している。
【００３０】
（５−１）筒状部
かかる筒状部は、可とう性であり筒状の成型体であれば、その他の形状、材質等、特に制限されるものではない。ここで、筒状とは、外周部とこの外周部に囲まれた内部空間を有する形状をいう。内部空間は、断面で見て、円形、だ円形、三角形、四角形等の多角形等で、取付管又は接続孔の形状に合わせて種々に変形し得る形状のものでよい。
【００３１】
本発明では、かかる筒状部は接続孔の周囲のリブ付き管上に据え付けられる。かかる筒状部には、内側に取付管が挿入される。筒状部は、取付管の外周に固定され取付管と密着する。
【００３２】
かかる筒状部と取付管との密着には、接着剤や締め付けバンド等の種々の手段を用いることができる。特に、固定バンド等を用い、筒状部を外側から締め付けることで、取付管に固定する処理が好ましい。かかる処理は筒状部と取付管との間の十分な水密性を比較的簡単で迅速に確保することができる。
【００３３】
（５−２）サドル部
本発明にかかるサドル部は、接続孔の周囲のリブ上に張り出し、リブ付き管に固定される。かかるサドル部は、取付管に固定される筒状部との間で可とう性を示し、取付管とリブ付き管との間の相対的位置の変位を弾性変形によって吸収する。
【００３４】
本発明では、かかるサドル部は、複数のリブ上に拡がり、リブ付き管に固定できるようにするのが好ましい。かかるサドル部はリブ付き管とより一層強固に固定される。
【００３５】
サドル部の大きさ、形状等は、リブ付き管の形状、接続孔の周辺形状、リブの形状等を考慮し、種々に設計することができる。
【００３６】
（５−３）継手本体の材質
本発明にかかる継手本体は、数々の弾性を有する材質から形成することができる。かかる材質は、スチレン・ブタジエンゴム、エチレン−プロピレン−ジエンターポリマー（ＥＰＤＭ）、クロロプレンゴム等の合成ゴムや、天然ゴム及び軟質塩化ビニル樹脂、熱可塑性エラストマー等からなる群より選定することができる。
【００３７】
（６）板状の止水部材
本発明にかかる板状の止水部材は、リブ付き管の接続孔を取り囲むようにサドル部の下側に設けられる。かかる止水部材は、前述のサドル部の外側からサドル部とともにリブ付き管のリブに対して押えつけられる。
【００３８】
（６−１）止水部材の材質
本発明にかかる止水部材は、０〜５のゴム硬度（タイプＡデュロメータ）の軟質ゴム系材料からなる。かかる止水部材は、リブに対して押えつけられると、圧縮変形し、リブ付き管のリブを埋め込み、サドル部とリブ付き管との間が水密に密閉される。
【００３９】
かかる止水部材は、例えば高油展性の合成ゴムであるノルボーネン１００部に対し、ゴム用軟化剤であるナフテン系オイル３００〜５００部と、充填剤５０〜１００部とを添加し、更に加硫に必要な硫黄や促進剤及びその他添加剤を配合して、練り及び加硫工程等を経て得ることができる。
【００４０】
また、かかる止水部材は、前述の原料中、ノルボーネンに代えて高油展性グレードのＥＰＤＭを用いた原料から作製しても良い。
【００４１】
さらに、かかる止水部材は、分子末端に水酸基を有する常温で液状の反応型ポリマー１００部に対し、ストレートアスファルト、ブロンアスファルト、タール等の瀝青物５０〜１０００部、分子末端にイソシアネート基を有する硬化剤、可塑剤、その他の添加剤を配合した原料から得ることができる。
【００４２】
前述の常温で液状の反応型ポリマーには、例えば液状ポリブタジエン、液状クロロプレン、液状スチレンブタジエン共重合体、ポリエーテルポリオール、シリコーン、ポリサルファイド、変性シリコーン等が含まれる。
【００４３】
前述の硬化剤としては、トルイレンジイソシアネート、ヘキサメチレンジイソシアネート、末端イソシアネート基を有するプレポリマー等を挙げることができる。
【００４４】
（６−２）止水部材の孔
本発明では、孔を有する１枚の止水部材を用いるのが好ましい。かかる孔は、接続孔によるリブ付き管と取付管との連通を妨げない位置及び大きさで設けられる。かかる孔付き止水部材は、接続孔の開口を確保しつつ、接続孔の周囲のリブとサドル部との隙間又はリブ間の隙間を効果的に塞ぐことができる。
【００４５】
かかる孔付き止水部材の孔の径は接続孔の径よりも大きいのが好ましい。かかる止水部材は、設置位置が多少ずれても接続孔の開口を十分に確保することができる。かかる孔の形状は、接続孔の開口を妨げなければ、角型形状等、種々の形状で良い。
【００４６】
なお、本発明では、止水部材は複数枚に分けて用いることができる。かかる場合、複数枚の止水部材は、接続孔を塞がないように接続孔の周囲に配置し、水密性が低下しないように互いの止水部材を継目部分で密着させるのが好ましい。
【００４７】
（６−３）リブ用溝
本発明では、板状の止水部材はリブ付き管側の面にリブが埋め込まれるリブ用溝１６を有する。かかる止水部材では、リブ用溝にリブが食い込み、止水部材がリブ付き管に押し付けられた際、止水部材が圧縮変形することによってリブ用溝がリブに絡み付き、著しく優れた水密性を発揮する。
【００４８】
（７）剛性の押えカバー
本発明にかかる剛性の押えカバーはサドル部の外面に設けられる。かかる押えカバーは、サドル部及び止水部材をリブ付き管に押えつける。この際、前述したように、止水部材が圧縮変形し、リブを埋め込んで、サドル部とリブ付き管との間が水密に密閉される。
【００４９】
かかる押えカバーはリブ付き管の外径よりも小さい内径を有し、自らの弾性復元力によりリブ付き管を挟み込む種類のものを用いることができる。かかる押えカバーは、バネ鋼等から作製することができる。
【００５０】
（７−１）締結バンド
本発明では、押えカバー自体に、サドル部等をリブ付き管に押し付ける力がなくてもよい。この場合、かかる押えカバーは、締結バンドを用いてリブ付き管に締め付けることができる。
【００５１】
かかる締め付けは、締結バンドと押えカバーとの双方にフランジ部を設け、フランジ部を連結ボルトで繋ぎ、連結ボルトを締め込むことで行える。なお、本発明では、押さえカバーを複数本の円周バンドを用いて締め付けることもできる。
【００５２】
（７−２）押えカバー等の材質
本発明にかかる剛性の押えカバー、締結バンド７、連結ボルトは、ステンレス鋼、防錆メッキ鋼、硬質プラスチック、繊維強化プラスチック等の材質のものを使用できる。これらは腐食し難いので望ましい。
【００５３】
（８）カラー部材
本発明では、接続孔の内面に、カラー部材を設けることができる。かかるカラー部材は、接続孔の内面を覆う筒状の内筒部と、内筒部から外方向に突出し接続孔の周囲のリブ上に張り出す鍔部とを有する。
【００５４】
本発明にかかるカラー部材は、リブ間に下水等の管内流動物が入り込んで、固形物等が詰まって貯まるのを防ぎ、管内流動を円滑にすることができる。
【００５５】
（８−１）管受け部
また、本発明では、カラー部材の内筒部の内面に段差を設け、取付管の挿入端を受ける管受け部とすることができる。かかる管受け部は、接続構造を埋設後、土圧により取付管がリブ付き管本管に突入する危険性が高い地域では、取付管の突入を有効に防止することができる。
【００５６】
本発明にかかるカラー部材は、押えカバー等と同様に、ステンレス鋼等の腐食し難い材質のものを使用することができる。
【００５７】
（９）接続構造の施工方法
本発明では、所望によりカラー部材をリブ付き管の接続孔に据え付け、板状の止水部材を接続孔周辺にセットした後、可とう性の継手本体の筒状部と接続孔及びカラー部材の内筒部を位置決めし、止水部材の上に可とう性の継手本体を据え付け、更に可とう性の継手本体のサドル部に押えカバーを被せ、押えカバーを、締結バンドを用いる等して締め付け固定する。
【００５８】
このように、本発明の接続構造は、接着剤で接続する場合のような熟練や高度の注意力が必要とならず、接着剤自体必要でなく、迅速しかも確実に施工することができる。また、本発明の接続構造では、エポキシ系接着剤の応力剥離等の欠点もない。
【００５９】
図面を参照して、本発明を説明する。
図１は本発明の１例の接続構造を側面から見た部分断面図である。図２は図１の接続構造のＡ部分の拡大図である。図３は図１の接続構造の正面図である。図４は図３の接続構造のＢ部分の拡大図である。
【００６０】
図５（ａ）は本発明にかかる１例の止水部材を側面から見た部分断面図である。図５（ｂ）は図５（ａ）の止水部材の正面図である。図６（ａ）は、本発明にかかる１例の押えカバーを締結バンドで締め付ける様子を示した図である。図６（ｂ）は図６（ａ）の押えカバーを正面から見た図である。
【００６１】
図７（ａ）は本発明にかかる１例のカラー部材の正面図である。図７（ｂ）は図７（ａ）のカラー部材の上面図である。図７（ｃ）は図７（ａ）のカラー部材の側面図である。
【００６２】
図８は本発明にかかる他の例のカラー部材を正面から見た部分断面図である。図９は本発明の他の例の接続構造を正面から見た部分断面図である。図１０は本発明の更に他の例の接続構造の側面図である。
【００６３】
図１〜４に示すように、接続構造１は、リブ付き管２と取付管３と止水可とう継手４とを備えており、リブ付き管２と取付管３とが止水可とう継手４によって接続されている。
【００６４】
止水可とう継手４は可とう性の継手本体５と軟質ゴム系の止水部材６と押えカバー７と締結バンド８と連結ボルト９を含んでいる。
【００６５】
可とう性の継手本体５は、筒状部５ａとサドル部５ｂとを有しており、リブ付き管２の接続孔１０と取付管３との間に配置されている。この例の筒状部５ａには、伸縮を許容する蛇腹部ｃが設けられている。
【００６６】
継手本体５の筒状部５ａは取付管３の周囲に密着しており、接続孔９に据え付けられている。サドル部５ｂは筒状部５ａから接続孔２ａの表面の環状リブ２ｂの上に張り出している。
【００６７】
止水部材６は、リブ付き管２の接続孔２ａを囲むように配置されており、継手本体５のサドル部５ｂを介して押えカバー７及び締結バンド８を連結ボルト９でリブ付き管２に締め付け固定されている。
【００６８】
接続構造１では、リブ付き管２の接続孔２ａに収まるカラー部材１１が設置されており、リブ２ｂ間に下水等が入り込んだり、又は固形物等が詰まって貯まるのを防いでいる。カラー部材１１は内筒部１１ａと鍔部１１ｂとを有する。
【００６９】
可とう性の継手本体５の筒状部５ａは、取付管３に密接し、固定バンド１２で固定されている。
【００７０】
図５には、軟質ゴム系の止水部材６を詳細に示す。止水部材６は、図５に示す如く、リブ付き管２のリブ２ｂを収めるリブ用溝６ａをリブ管側の面に有し、中央部には接続孔２ａより大きい径を有する中央孔６ｂを有する。特に図では示していないが、中央孔６ｂの形状は角型形状でも良い。止水部材６は、図１〜４に示すように接続孔２ａ及びカラー部材１１の周りを取り囲むよう配置される。
【００７１】
図６には、押えカバー７と締結バンド８及び両者を繋ぐ連結ボルト９を詳細に示す。接続構造１では、図１〜４及び図６に示すように、押えカバー７と締結バンド８は、それぞれに設けたフランジ７ａ，８ａを連結ボルト９で締め付ける構成としている。なお、本発明では、押えカバー７は、特に図示してはいないが、２本の円周バンドで締め付ける構成でも良い。
【００７２】
図７は、図１〜４の接続構造で用いるカラー部材１１を詳細に示したものである。カラー部材１１は、リブ付き管２の接続孔２ａの内面に沿う内筒部１１ａと内筒部１１ａに連続し接続孔２ａの外周面に係止される鍔部１１ｂよりなる。
【００７３】
本発明では、図９に示すようなカラー部材１３を用いることができる。カラー部材１３は、内筒部１３ａと鍔部１３ｂとを有し、内筒部１３ａが鍔部１３ｂを超えて突出する筒状の突出部１３ｃを形成している。カラー部材１３では、突出部１３ｃの内側に、取付管を受ける管受け部１３ｄが設けられている。
【００７４】
図１０は、本発明の別の実施例を示す。この例の接続構造２１では、カラー部材１３が用いられている。
【００７５】
図１１は、本発明の更に他の例の接続構造３１を示す。接続構造３１では、軟質ゴム系の止水部材は、押えカバー３７と３本の締結バンド３８で締め付けられており、均一に圧縮変形する。
【００７６】
【発明の効果】
本発明の接続構造によれば、可とう性の継手本体がリブ付き管と取付管との間の相対的位置関係の変位を吸収し、板状の止水部材が接続孔周辺のリブに密着して継手本体のサドル部とリブ付き管との間が水密に密閉されるので、不同沈下や地震等によって継手部に応力がかかっても著しく優れた水密性を発揮する。
【図面の簡単な説明】
【図１】本発明の１例の接続構造を側面から見た部分断面図である。
【図２】図１の接続構造のＡ部分の拡大図である。
【図３】図１の接続構造の正面図である。
【図４】図３の接続構造のＢ部分の拡大図である。
【図５】（ａ）は本発明にかかる１例の止水部材を側面から見た部分断面図である。（ｂ）は（ａ）の止水部材の正面図である。
【図６】（ａ）は、本発明にかかる１例の押えカバーを締結バンドで締め付ける様子を示した図である。（ｂ）は（ａ）の押えカバーを正面から見た図である。
【図７】（ａ）は本発明にかかる１例のカラー部材の正面図である。（ｂ）は（ａ）のカラー部材の上面図である。（ｃ）は（ａ）のカラー部材の側面図である。
【図８】本発明にかかる他の例のカラー部材を正面から見た部分断面図である。
【図９】本発明の他の例の接続構造を正面から見た部分断面図である。
【図１０】本発明の更に他の例の接続構造の側面図である。
【図１１】（ａ）は従来例の接続構造を正面から見た部分断面図であり、（ｂ）は（ａ）の接続構造の側面図である。
【図１２】（ａ）は従来例の継手を正面から見た部分断面図であり、図（ｂ）は（ａ）の継手を側面から見た部分断面図である。
【符号の説明】
１，２１，３１接続構造
２リブ付き管
２ａ接続孔
２ｂリブ
３取付管
４止水可とう継手
５継手本体
５ａ筒状部
５ｂサドル部
６止水部材
６ａリブ用溝
６ｂ中央孔
７，３７押えカバー
７ａ，８ａフランジ
８，３８締結バンド
９連結ボルト
１１，１３カラー部材
１１ａ，１３ａ内筒部
１１ｂ，１３ｂ鍔部
１２固定バンド
１３ｃ突出部
１３ｄ管受け部
５１従来の接続構造
５２継手
５３鞍部
５４リブ受け溝
５５エポキシ系接着剤
５６番線
５７ゴム輪[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connecting structure between a ribbed tube and a mounting tube, and more particularly to a water-stopper flexible joint for connecting a ribbed tube embedded in the ground to the mounting tube.
[0002]
[Prior art]
For sewer pipes, vinyl chloride pipes, reinforced concrete pipes, ceramic pipes, etc. are used. Such pipes are buried in the ground and play a role of collecting wastewater from houses, office buildings, factories, etc. in a treatment plant.
[0003]
In recent years, the adoption of ribbed rigid polyvinyl chloride pipes has been increasing for the maintenance of sewer pipes. Such a ribbed tube is excellent in load resistance and light weight and can be applied to a crushed stone foundation.
[0004]
A rigid PVC joint is used to connect the ribbed tube and the mounting tube. FIG. 11A is a partial cross-sectional view of a conventional connection structure as viewed from the front, and FIG. 11B is a side view of the connection structure of FIG. FIG. 12A is a partial cross-sectional view of a conventional joint as viewed from the front, and FIG. 12B is a partial cross-sectional view of the joint of FIG. 12A as viewed from the side.
[0005]
As shown in FIGS. 11 and 12, in the conventional connection structure 51, the ribbed tube 2 and the attachment tube 3 are connected by a joint 52. The joint 52 is formed of hard vinyl chloride made of the same material as the ribbed tube 2. The flange portion 53 of the joint 52 has a rib receiving groove 54 in which the rib 2b of the ribbed tube 2 is received.
[0006]
As shown in FIG. 12, the ribbed tube 2 and the attachment tube 3 are connected by applying a two-liquid reaction type epoxy adhesive 55 to the back surface of the collar portion 53 and tightening it with a wire 56. At this time, the gap between the rib 2b and the rib receiving groove 54 is generally closed by filling with an adhesive 55 and sealing. Note that a rubber ring 57 is used to seal the space between the attachment pipe 3 and the joint 52.
[0007]
[Problems to be solved by the invention]
However, in such a connection structure, the hard vinyl chloride joint is not flexible, and it is necessary to accurately position the rib receiving groove and the rib. Such a regular grooved joint cannot be used unless it accurately fits the rib around the perforated portion of the ribbed tube, and requires great care and skill in the drilling and positioning operations of the ribbed tube.
[0008]
In such a connection structure, a rigid connection structure is formed after the epoxy adhesive is cured. Furthermore, the epoxy adhesive is mixed and applied on the spot with the main agent and the curing agent, but the attachment work and backfilling work of the mounting pipe cannot be performed until it is sufficiently cured.
[0009]
Thus, the conventional connection structure is not flexible because the hard vinyl chloride joint is joined with the epoxy adhesive. In such a connection structure, when the relative positional relationship between the ribbed tube and the mounting tube changes due to uneven settlement after backfilling, an earthquake, or the like, stress concentrates on the joint portion, and thus the epoxy adhesive may be peeled off. . Such peeling causes leakage and intrusion of unknown water.
[0010]
An object of the present invention is to connect a ribbed tube and a mounting tube with a flexible joint, and to displace the relative positional relationship between the mounting tube and the ribbed tube caused by uneven settlement, earthquake, etc. In addition to absorbing by elastic deformation, it is possible to obtain a joint structure that exhibits sufficient water tightness between the flexible joint and the rib even if stress is applied between the ribbed pipe and the mounting pipe. is there.
[0011]
[Means for Solving the Problems]
The present invention is a connection structure including a ribbed tube, a mounting tube, and a watertight flexible joint, wherein a connection hole of the ribbed tube and the mounting tube are connected by the watertight flexible joint. The water-stopping flexible joint has a flexible joint body, a plate-shaped water-stopping member, a rigid presser cover, and a fastening band, and the joint body closely contacts the outer periphery of the mounting pipe. And a saddle portion protruding outward from the cylindrical portion and projecting onto a rib around the connection hole, and the water stop member surrounds the connection hole. A rib groove is provided on a surface that is in contact with the ribbed tube, the rib is embedded in the rib groove, and the saddle portion and the ribbed tube are hermetically sealed. and vulcanization or of the water-stop member 5 following rubber hardness (type a durometer) Made of soft rubber material cured, the pressing cover is provided on an outer surface of the saddle portion, the pressing cover and the fastening band and the connecting bolt connecting both the saddle portion and the water-shutoff member with the rib A connection structure characterized in that it is pressed against a tube, the water stop member is compressed and deformed to embed the rib, and the saddle portion and the ribbed tube are sealed in a watertight manner, and The present invention relates to a watertight flexible joint for obtaining a connection structure.
[0012]
In the present invention, when connecting a ribbed tube and a mounting tube with a flexible joint, a predetermined plate-like water blocking member is brought into close contact with the rib shape of the ribbed tube, and the saddle portion of the flexible joint body and the ribbed tube This is based on the knowledge that the connection structure obtained exhibits a significantly excellent water tightness by sealing the gap in a water tight manner.
[0013]
In order to obtain sufficient water tightness between the ribbed tube and the mounting tube, the present inventor made various types of connection structures and examined them.
[0014]
As a result, when connecting the ribbed tube and the mounting tube using a flexible joint, the present inventor has a very complicated shape in the connection hole of the ribbed tube, and the annular rib is connected to the joint. It has been found that sufficient water stoppage cannot be obtained because the adhesion to the tube is hindered.
[0015]
Under such knowledge, the present inventor made various trial connection structures and examined them in detail in order to seal the connection hole in a watertight manner.
[0016]
As a result, when connecting the ribbed tube and the mounting tube, the inventor causes the plate-like water-stopping member to be in close contact with the outer peripheral portion of the connecting hole portion of the ribbed tube, and the rib is inserted into the water-stopping member. As a result, it was found that good water tightness of the connection hole portion can be obtained.
[0017]
Furthermore, the present inventor forms a plate-like water-stopping member from a soft rubber-based material having a rubber hardness of 0 to 5 (type A durometer), and compresses and deforms the water-stopping member so that the water-stopping member becomes a rib. The present invention has been completed by ascertaining that remarkably excellent water tightness is obtained between the saddle portion of the entangled and flexible joint body and the ribbed tube.
[0018]
According to the inventor's study, when the water-stopping member is a vulcanized rubber molded product, it was found that the normal hardness of the vulcanized rubber molded product [40 to 80 rubber hardness (type A durometer)] is too hard. . It has been found that such a hard water-stopping member requires a groove for ribs to be in close contact with the rib, and extremely high dimensional accuracy is required for the product of the water-stopping member itself and the rib, such as the arrangement of the rib groove.
[0019]
In addition, it is practically difficult for such a hard water-stopping member to be completely brought into close contact with the rib in the field installation work, and it does not compressively deform even when tightened with a fixing band or the like, and the saddle portion of the joint body and the ribbed tube The effect of sealing the gap tightly with water could not be expected.
[0020]
Furthermore, the water-expandable function that expands when the vulcanized rubber molded product comes into contact with water causes water leakage at the initial stage until it expands, and at this point, soil and sand enter and accumulate, There was a drawback that waterworks were formed and the infiltration of groundwater etc. could not be prevented even if the water expanded.
[0021]
According to the connection structure of the present invention, the flexible joint body absorbs the displacement of the relative positional relationship between the ribbed tube and the mounting tube, and the plate-like water-stopping member closely contacts the rib around the connection hole. In addition, since the space between the saddle portion of the joint body and the tube with ribs is hermetically sealed, even if stress is applied to the joint portion due to non-uniform settlement, earthquake, etc., extremely excellent water tightness is exhibited.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described.
(1) Connection structure The connection structure of the present invention includes a pipe with a rib and an attachment pipe, and the connection hole of the pipe with a rib and the attachment pipe are connected by a watertight flexible joint. Such a connection structure is not limited to the connection of sewer pipes, and can be used when connecting pipes for various purposes.
[0023]
(2) Ribbed tube The ribbed tube according to the present invention may be of various shapes and materials. The rib may be formed in various forms such as an annular shape formed in the circumferential direction of the tube, a stripe shape formed in the length direction of the tube, and a lattice shape.
[0024]
(2-1) Connection hole The ribbed tube has a connection hole. Such a connection hole allows the ribbed tube and the attachment tube to communicate with each other. Such a connection hole can be made into a hole of various shapes or structures depending on the size and strength of the attachment tube or the ribbed tube, the connection application, and the like.
[0025]
Such connection holes may be perforations, and such perforations may be formed by drilling a ribbed tube using a suitable perforator in the field or at the factory.
[0026]
(3) Attachment tube The attachment tube according to the present invention can be used in various shapes and materials. Such a mounting pipe assumes a case where the ribbed pipe is a main pipe and the mounting pipe is a branch pipe. However, in the present invention, the attachment pipe may be a main pipe and the ribbed pipe may be a branch pipe.
[0027]
The above-described ribbed tube can also be used as the mounting tube. When a ribbed tube is used as the mounting tube, a plate-like water-stopping member according to the present invention as described later is provided between the cylindrical portion of the joint body and the mounting tube, and the cylindrical portion and the mounting tube It is necessary to obtain sufficient watertightness.
[0028]
(4) Water-stopping flexible joint The water-stopping flexible joint according to the present invention connects the connection hole of the ribbed pipe and the mounting pipe in a watertight manner. Such a water stop flexible joint has a flexible joint body, a plate-like water stop member, and a rigid presser cover.
[0029]
(5) Flexible joint body The joint body has a cylindrical portion that is in close contact with the outer periphery of the mounting pipe, and a saddle portion that protrudes outward from the tubular portion and projects onto the rib around the connection hole. ing.
[0030]
(5-1) Cylindrical portion The cylindrical portion is not particularly limited as long as it is flexible and has a cylindrical shape. Here, the cylindrical shape means a shape having an outer peripheral portion and an internal space surrounded by the outer peripheral portion. The internal space may be a circular shape, an oval shape, a triangular shape, a polygonal shape such as a quadrangular shape, or the like when viewed in cross section, and may have a shape that can be variously deformed according to the shape of the attachment tube or the connection hole.
[0031]
In the present invention, such a cylindrical portion is installed on a ribbed tube around the connection hole. A mounting tube is inserted into the cylindrical portion on the inner side. The cylindrical portion is fixed to the outer periphery of the attachment tube and is in close contact with the attachment tube.
[0032]
Various means such as an adhesive and a fastening band can be used for the close contact between the tubular portion and the attachment tube. In particular, it is preferable to use a fixing band or the like and fasten the cylindrical portion from the outside to fix it to the attachment pipe. Such treatment can ensure a sufficient water tightness between the tubular portion and the mounting tube relatively easily and quickly.
[0033]
(5-2) Saddle Part The saddle part according to the present invention projects on the rib around the connection hole and is fixed to the ribbed tube. Such a saddle portion exhibits flexibility between the cylindrical portion fixed to the attachment tube, and absorbs the displacement of the relative position between the attachment tube and the ribbed tube by elastic deformation.
[0034]
In the present invention, it is preferable that the saddle portion extends on the plurality of ribs and can be fixed to the ribbed tube. Such a saddle portion is more firmly fixed to the ribbed tube.
[0035]
The size, shape, and the like of the saddle portion can be variously designed in consideration of the shape of the ribbed tube, the peripheral shape of the connection hole, the shape of the rib, and the like.
[0036]
(5-3) Material of Joint Main Body The joint main body according to the present invention can be formed from a number of elastic materials. Such materials can be selected from the group consisting of synthetic rubbers such as styrene-butadiene rubber, ethylene-propylene-diene terpolymer (EPDM), chloroprene rubber, natural rubber, soft vinyl chloride resin, thermoplastic elastomer, and the like.
[0037]
(6) Plate-like water stop member The plate-like water stop member concerning this invention is provided under a saddle part so that the connection hole of a pipe | tube with a rib may be surrounded. Such a water stop member is pressed against the rib of the ribbed tube together with the saddle portion from the outside of the saddle portion.
[0038]
(6-1) Material of water stop member The water stop member according to the present invention is made of a soft rubber-based material having a rubber hardness (type A durometer) of 0 to 5. When the water stop member is pressed against the rib, the water stop member is compressed and deformed, and the rib of the ribbed tube is embedded, so that the space between the saddle portion and the ribbed tube is hermetically sealed.
[0039]
Such a water-stopping member is obtained by adding 300 to 500 parts of a naphthenic oil as a rubber softener and 50 to 100 parts of a filler to 100 parts of norbornene which is a highly oil-extended synthetic rubber. It can be obtained through a kneading and vulcanizing step, etc. by blending sulfur, an accelerator and other additives necessary for the vulcanization.
[0040]
Further, the water-stopping member may be produced from a raw material using high oil-extensibility grade EPDM in place of norbornene in the above-mentioned raw materials.
[0041]
Further, the water-stopping member is a cured polymer having 50 to 1000 parts of bituminous materials such as straight asphalt, bronze asphalt, tar, etc., and an isocyanate group at the molecular terminal with respect to 100 parts of a reactive polymer at room temperature having a hydroxyl group at the molecular terminal It can be obtained from the raw material which mix | blended the agent, the plasticizer, and other additives.
[0042]
Examples of the reactive polymer that is liquid at normal temperature include liquid polybutadiene, liquid chloroprene, liquid styrene butadiene copolymer, polyether polyol, silicone, polysulfide, and modified silicone.
[0043]
Examples of the curing agent include toluylene diisocyanate, hexamethylene diisocyanate, and a prepolymer having a terminal isocyanate group.
[0044]
(6-2) Hole in water-stopping member In the present invention, it is preferable to use one water-stopping member having a hole. Such a hole is provided at a position and a size that do not hinder communication between the ribbed tube and the mounting tube by the connection hole. Such a water stop member with a hole can effectively close a gap between the rib around the connection hole and the saddle portion or a gap between the ribs while ensuring the opening of the connection hole.
[0045]
It is preferable that the hole diameter of the water-stopping member with holes is larger than the diameter of the connection hole. Such a water stop member can sufficiently secure the opening of the connection hole even if the installation position is slightly deviated. The shape of the hole may be various shapes such as a square shape as long as the opening of the connection hole is not hindered.
[0046]
In the present invention, the water stop member can be divided into a plurality of sheets. In such a case, it is preferable that the plurality of water-stop members are arranged around the connection holes so as not to block the connection holes, and the water-stop members are closely adhered to each other at the joint portion so that the water tightness is not deteriorated.
[0047]
(6-3) Rib Groove In the present invention, the plate-shaped waterstop member has the rib groove 16 in which the rib is embedded in the ribbed tube side surface . In such a water-stopping member, the rib bites into the rib groove, and when the water-stopping member is pressed against the ribbed tube, the water-stopping member compresses and deforms so that the rib groove is entangled with the rib, resulting in extremely excellent water tightness. Demonstrate .
[0048]
(7) Rigid presser cover The rigid presser cover according to the present invention is provided on the outer surface of the saddle portion. The presser cover presses the saddle portion and the water stop member against the ribbed tube. At this time, as described above, the water stop member is compressed and deformed, the rib is embedded, and the space between the saddle portion and the ribbed tube is sealed in a watertight manner.
[0049]
Such a presser cover has an inner diameter smaller than the outer diameter of the ribbed tube and can be of a type that sandwiches the ribbed tube by its own elastic restoring force. Such a presser cover can be made of spring steel or the like.
[0050]
(7-1) Fastening Band In the present invention, the presser cover itself may not have a force for pressing the saddle portion or the like against the ribbed tube. In this case, the presser cover can be fastened to the ribbed tube using a fastening band.
[0051]
Such tightening can be performed by providing flange portions on both the fastening band and the presser cover, connecting the flange portions with connecting bolts, and tightening the connecting bolts. In the present invention, the pressing cover can be tightened using a plurality of circumferential bands.
[0052]
(7-2) Material of presser cover and the like The rigid presser cover, fastening band 7 and connecting bolt according to the present invention can be made of materials such as stainless steel, rust-proof plated steel, hard plastic, and fiber reinforced plastic. These are desirable because they are difficult to corrode.
[0053]
(8) Color member In the present invention, a color member can be provided on the inner surface of the connection hole. Such a collar member has a cylindrical inner cylinder part that covers the inner surface of the connection hole, and a flange part that protrudes outward from the inner cylinder part and projects onto a rib around the connection hole.
[0054]
The collar member according to the present invention can prevent the fluid in the pipe such as sewage from entering between the ribs and prevent clogging and accumulation of solid matter, etc., and smooth the flow in the pipe.
[0055]
(8-1) Tube receiving portion In the present invention, a step can be provided on the inner surface of the inner cylindrical portion of the collar member to provide a tube receiving portion that receives the insertion end of the mounting tube. Such a pipe receiving portion can effectively prevent the mounting pipe from entering in an area where there is a high risk that the mounting pipe will enter the ribbed pipe main pipe due to earth pressure after the connection structure is buried.
[0056]
The collar member according to the present invention can be made of a material that is not easily corroded, such as stainless steel, like the presser cover.
[0057]
(9) Connection method construction method In the present invention, if desired, the collar member is installed in the connection hole of the ribbed tube, and the plate-shaped water-stopping member is set around the connection hole. Position the connection tube and the inner cylindrical part of the collar member, install the flexible joint body on the water stop member, and put the presser cover on the saddle part of the flexible joint body. Tighten and fix using a fastening band.
[0058]
As described above, the connection structure of the present invention does not require skill and high attention as in the case of connecting with an adhesive, and does not require the adhesive itself, and can be applied quickly and reliably. Further, the connection structure of the present invention has no drawbacks such as stress peeling of the epoxy adhesive.
[0059]
The present invention will be described with reference to the drawings.
FIG. 1 is a partial cross-sectional view of a connection structure of an example of the present invention as viewed from the side. FIG. 2 is an enlarged view of portion A of the connection structure of FIG. FIG. 3 is a front view of the connection structure of FIG. 4 is an enlarged view of a portion B of the connection structure of FIG.
[0060]
Fig.5 (a) is the fragmentary sectional view which looked at the water stop member of one example concerning this invention from the side surface. FIG.5 (b) is a front view of the water stop member of Fig.5 (a). Fig.6 (a) is the figure which showed a mode that the presser cover of an example concerning this invention was fastened with a fastening band. FIG. 6B is a front view of the presser cover of FIG.
[0061]
FIG. 7A is a front view of an example of the collar member according to the present invention. FIG. 7B is a top view of the collar member of FIG. FIG.7 (c) is a side view of the collar member of Fig.7 (a).
[0062]
FIG. 8 is a partial sectional view of another example of the collar member according to the present invention as seen from the front. FIG. 9 is a partial cross-sectional view of the connection structure of another example of the present invention as seen from the front. FIG. 10 is a side view of a connection structure of still another example of the present invention.
[0063]
As shown in FIGS. 1 to 4, the connection structure 1 includes a ribbed tube 2, a mounting tube 3, and a watertight flexible joint 4, and the ribbed tube 2 and the mounting tube 3 are watertight flexible joints. 4 are connected.
[0064]
The water stop flexible joint 4 includes a flexible joint main body 5, a soft rubber water stop member 6, a presser cover 7, a fastening band 8, and a connecting bolt 9.
[0065]
The flexible joint body 5 has a cylindrical portion 5 a and a saddle portion 5 b, and is disposed between the connection hole 10 of the ribbed tube 2 and the attachment tube 3. The cylindrical portion 5a in this example is provided with a bellows portion c that allows expansion and contraction.
[0066]
The tubular portion 5 a of the joint body 5 is in close contact with the periphery of the attachment pipe 3 and is installed in the connection hole 9. The saddle portion 5b projects from the cylindrical portion 5a onto the annular rib 2b on the surface of the connection hole 2a.
[0067]
The water stop member 6 is disposed so as to surround the connection hole 2 a of the ribbed tube 2, and the presser cover 7 and the fastening band 8 are connected to the ribbed tube 2 by the connecting bolt 9 via the saddle portion 5 b of the joint body 5. Tightened and fixed.
[0068]
In the connection structure 1, the collar member 11 that fits in the connection hole 2 a of the ribbed tube 2 is installed to prevent sewage or the like from entering between the ribs 2 b or clogging and accumulation of solid matter. The collar member 11 has an inner cylinder portion 11a and a flange portion 11b.
[0069]
The tubular portion 5 a of the flexible joint body 5 is in close contact with the attachment tube 3 and is fixed by a fixing band 12.
[0070]
FIG. 5 shows the soft rubber-based water stop member 6 in detail. As shown in FIG. 5, the water-stop member 6 has a rib groove 6a for accommodating the rib 2b of the ribbed tube 2 on the surface on the rib tube side, and a central hole 6b having a diameter larger than the connection hole 2a at the center. Have Although not shown in the drawing, the shape of the central hole 6b may be a square shape. The water stop member 6 is disposed so as to surround the connection hole 2a and the collar member 11 as shown in FIGS.
[0071]
FIG. 6 shows in detail the presser cover 7, the fastening band 8, and the connecting bolt 9 that connects the two. In the connection structure 1, as shown in FIGS. 1 to 4 and FIG. 6, the presser cover 7 and the fastening band 8 are configured such that flanges 7 a and 8 a provided on each of them are fastened with connecting bolts 9. In the present invention, the presser cover 7 is not particularly illustrated, but may be configured to be tightened by two circumferential bands.
[0072]
FIG. 7 shows in detail the collar member 11 used in the connection structure of FIGS. The collar member 11 includes an inner cylinder portion 11a along the inner surface of the connection hole 2a of the ribbed tube 2 and a flange portion 11b that is continuous with the inner cylinder portion 11a and is engaged with the outer peripheral surface of the connection hole 2a.
[0073]
In the present invention, a collar member 13 as shown in FIG. 9 can be used. The collar member 13 has an inner tube portion 13a and a flange portion 13b, and forms a cylindrical protruding portion 13c in which the inner tube portion 13a protrudes beyond the flange portion 13b. In the collar member 13, a tube receiving portion 13d that receives the attachment tube is provided inside the protruding portion 13c.
[0074]
FIG. 10 shows another embodiment of the present invention. In the connection structure 21 of this example, the collar member 13 is used.
[0075]
FIG. 11 shows a connection structure 31 of still another example of the present invention. In the connection structure 31, the soft rubber waterproofing member is fastened by the presser cover 37 and the three fastening bands 38, and is uniformly compressed and deformed.
[0076]
【The invention's effect】
According to the connection structure of the present invention, the flexible joint body absorbs the displacement of the relative positional relationship between the ribbed tube and the mounting tube, and the plate-like water-stopping member closely contacts the rib around the connection hole. In addition, since the space between the saddle portion of the joint body and the tube with ribs is hermetically sealed, even if stress is applied to the joint portion due to non-uniform settlement, earthquake, etc., extremely excellent water tightness is exhibited.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view of a connection structure of an example of the present invention as viewed from the side.
FIG. 2 is an enlarged view of a portion A of the connection structure of FIG.
FIG. 3 is a front view of the connection structure of FIG. 1;
4 is an enlarged view of a portion B of the connection structure of FIG. 3;
FIG. 5A is a partial cross-sectional view of an example of a water stop member according to the present invention as viewed from the side. (B) is a front view of the water stop member of (a).
FIG. 6A is a diagram showing a state in which an example presser cover according to the present invention is fastened with a fastening band. (B) is the figure which looked at the presser cover of (a) from the front.
FIG. 7A is a front view of an example of a collar member according to the present invention. (B) is a top view of the collar member of (a). (C) is a side view of the collar member of (a).
FIG. 8 is a partial cross-sectional view of a collar member of another example according to the present invention as viewed from the front.
FIG. 9 is a partial cross-sectional view of a connection structure of another example of the present invention as viewed from the front.
FIG. 10 is a side view of a connection structure of still another example of the present invention.
11A is a partial cross-sectional view of a conventional connection structure as viewed from the front, and FIG. 11B is a side view of the connection structure of FIG.
12A is a partial cross-sectional view of a conventional joint viewed from the front, and FIG. 12B is a partial cross-sectional view of the joint of FIG.
[Explanation of symbols]
1, 21 and 31 Connection structure 2 Ribbed tube 2a Connection hole 2b Rib 3 Mounting tube 4 Water stop flexible joint 5 Joint body 5a Tubular portion 5b Saddle portion 6 Water stop member 6a Rib groove 6b Center hole 7, 37 Presser Cover 7a, 8a Flange 8, 38 Fastening band 9 Connecting bolt 11, 13 Collar member 11a, 13a Inner cylinder part 11b, 13b Ridge part 12 Fixed band 13c Protruding part 13d Pipe receiving part 51 Conventional connection structure 52 Joint 53 Ridge part 54 Rib Receiving groove 55 Epoxy adhesive 56 Wire 57 Rubber ring

Claims

リブ付き管と取付管と止水可とう継手とを備えており、前記リブ付き管の接続孔と前記取付管とが前記止水可とう継手によって接続されている接続構造であって、前記止水可とう継手が、可とう性の継手本体と板状の止水部材と剛性の押えカバーと締結バンドとを有しており、前記継手本体が、前記取付管の外周に密着する筒状部と、前記筒状部から外方向に突出し前記接続孔の周囲のリブ上に張り出すサドル部とを有しており、前記止水部材が、前記接続孔を取り囲むように前記サドル部の下側に設けられ、前記リブ付き管に接する面にリブ用溝を有し、前記リブが前記リブ用溝に埋め込まれ、前記サドル部と前記リブ付き管との間が水密に密閉されており、前記止水部材が５以下のゴム硬度（タイプＡデュロメータ）の加硫又は硬化させた軟質ゴム系材料からなり、前記押えカバーが前記サドル部の外面に設けられており、前記押えカバーと締結バンド及び両者を繋ぐ連結ボルトが前記サドル部及び前記止水部材を前記リブ付き管に押えつけており、前記止水部材が圧縮変形し前記リブを埋め込んでおり、前記サドル部と前記リブ付き管との間が水密に密閉されていることを特徴とする接続構造。A connection structure in which a ribbed tube, a mounting tube, and a watertight flexible joint are provided, and a connection hole of the ribbed tube and the mounting tube are connected by the watertight flexible joint, The water-repellent joint has a flexible joint body, a plate-like water-stopping member, a rigid presser cover, and a fastening band, and the joint body is in close contact with the outer periphery of the mounting pipe. And a saddle portion protruding outward from the tubular portion and projecting onto a rib around the connection hole, and the water stop member is provided on a lower side of the saddle portion so as to surround the connection hole. A rib groove on a surface in contact with the ribbed tube, the rib is embedded in the rib groove, and the space between the saddle portion and the ribbed tube is hermetically sealed. vulcanization or water cutoff member 5 following rubber hardness (type a durometer) of cured Made of soft rubber-based material, wherein the holding cover is provided on an outer surface of the saddle portion, pressing the connecting bolts the saddle portion and the water-shutoff member connecting the fastening band and both said retaining cover the tube with the ribs The connection structure is characterized in that the water stop member is compressed and deformed to embed the rib, and the saddle portion and the ribbed tube are sealed in a watertight manner.

リブ付き管と取付管とを備える接続構造を得るために、前記リブ付き管の接続孔と前記取付管とを接続するのに用いる止水可とう継手であって、前記止水可とう継手が、可とう性の継手本体と板状の止水部材と剛性の押えカバーとを有しており、前記継手本体が、前記取付管の外周に密着する筒状部と、前記筒状部から外方向に突出し前記接続孔の周囲のリブ上に張り出すサドル部とを有しており、前記止水部材が、前記接続孔を取り囲むように前記サドル部の下側に設けられ、前記リブ付き管に接する面にリブ用溝を有し、前記リブが前記リブ用溝に埋め込まれ、前記サドル部と前記リブ付き管との間が水密に密閉され、前記止水部材が５以下のゴム硬度（タイプＡデュロメータ）の加硫又は硬化させた軟質ゴム系材料からなり、前記押えカバーが前記サドル部の外面に設けられ、前記押えカバーと締結バンド及び両者を繋ぐ連結ボルトによって前記サドル部及び前記止水部材が前記リブ付き管に押えつけられ、前記止水部材が圧縮変形し前記リブを埋め込み、前記サドル部と前記リブ付き管との間が水密に密閉されることを特徴とする止水可とう継手。 In order to obtain a connection structure comprising a ribbed tube and a mounting tube, a watertight flexible joint used for connecting the connection hole of the ribbed tube and the mounting tube, wherein the watertight flexible joint is A flexible joint body, a plate-like water-stopping member, and a rigid presser cover, and the joint body is in close contact with the outer periphery of the mounting tube, and is external to the tubular part. A saddle portion protruding in a direction and projecting on a rib around the connection hole, and the water stop member is provided below the saddle portion so as to surround the connection hole, and the ribbed tube A rib groove on the surface in contact with the rib, the rib is embedded in the rib groove, and the saddle portion and the ribbed tube are sealed in a watertight manner. Type A durometer) vulcanized or cured soft rubber material, the presser A bar is provided on the outer surface of the saddle portion, and the saddle portion and the water stop member are pressed against the ribbed tube by the presser cover, the fastening band, and a connecting bolt that connects the two, and the water stop member is compressed and deformed. A water-stopping flexible joint, wherein the rib is embedded and the saddle portion and the ribbed tube are hermetically sealed .