JP2004289983A

JP2004289983A - Conduit water stop device

Info

Publication number: JP2004289983A
Application number: JP2003082200A
Authority: JP
Inventors: Kohei Togashi; 紘平富樫; Sakae Omori; 栄大森; Kazuo Sakai; 一雄酒井
Original assignee: Kandenko Co Ltd; Yotsugi Co Ltd
Current assignee: Kandenko Co Ltd; Yotsugi Co Ltd
Priority date: 2003-03-25
Filing date: 2003-03-25
Publication date: 2004-10-14

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conduit water stop device which quickly handles such work as additional stretching, with less number of components, for easy attaching/detaching operation. <P>SOLUTION: The conduit water stop device seals a conduit P in which a cable C is laid, and comprises a holding member 1, a sealing member 2 which elastically deforms and covers the holding member 1, pressurizing plates 3 and 4 arranged across the sealing member 2, and a fastening member that fastens the pressurizing plates 3 and 4. A cable can be attached from outside the holding member 1 and the pressurizing plates 3 and 4 that are temporarily assembled, for easy operation such as additional stretching of the cable C. By compressing and deforming the sealing member 2 by tightening the fastening means, the outer peripheral surface of the sealing member 2 tightly contacts the inner peripheral wall of the conduit P, to prevent water or the like from entering. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、通信ケーブル等が敷設された管路内部への水または泥等の浸入を防止する管路止水装置に関する。
【０００２】
【従来の技術】
近年、地下ケーブルを使用した電力供給や電気通信が広く行われている。このような通信ケーブル等の各種ケーブルは、地下に構築されている情報ボックス、電線共同溝、または下水道管から、専用管路を介してビルや一般住宅等の地下設備へ敷設されている。このような地下に埋設された通信線等の管路内に、雨水や汚水、汚泥等が浸入するとケーブルの腐食劣化を速めたり、ビル等の地下設備等に雨水等が引き込まれたりする場合があるので、管路の管口部を密封し防水する必要がある。このような問題に対処し、従来、管口部を密封する様々な止水装置（防水構造）が提案されている。
【０００３】
例えば、特許文献１に記載された防水装置は、弾性材料からなる円柱状のシールブロック体を管路内に挿入配置すると共に、シールブロック体に開設された挿通孔にケーブルを挿通し、シールブロック体の前後両側面に配置した扇形状の複数の分割締付盤を相互に締付ボルト、ナットにより締結し押圧することでシールブロック体を径方向に沿って膨張させる。それにより、シールブロック体の外周面は管路の内周面に、挿通孔の内周面はケーブルの外周面にそれぞれ密着し、管路内への水の浸入等を防止するようになっている。
【０００４】
【特許文献１】
特開２０００−３２０７３６号公報（第１図）
【０００５】
【発明が解決しようとする課題】
ところで、需要家の電力または通信の使用事情が変わることにより、既に通信ケーブル等が敷設されている管路に、新たにケーブルを追加して増設（追い張り）する場合がある。そのような場合に備えて、管路内への水等の浸入を防止する止水装置もケーブルの敷設本数の変更に対応できることが要求されている。
【０００６】
ところが、上述のような従来の防水装置では、ケーブルの追い張り工事に伴い装置の着脱作業の際に、複数の分割締付盤を締結している各々のボルトを取り外してシールブロック体を除去し、新たに敷設されたケーブル本数に適合したシールブロック体を管路内に挿入後、更に複数の分割締付盤をボルト締めして装着させる必要があった。このように、従来の防水装置は、装置の着脱作業において取り扱う部品点数が多く、現場での作業が煩雑であった。
【０００７】
本発明はこうした課題に鑑みてなされたものであり、例えば、部品点数が少なく着脱作業が容易であり、または追い張り等の工事に迅速に対応できる等の管路止水装置を提供することを目的とする。
【０００８】
【課題を解決するための手段】
請求項１に記載の発明は、ケーブルが敷設された管路を密封する管路止水装置であって、略円柱状の外周面に軸方向に沿って前記ケーブルを保持する溝部が形成された保持部材と、前記保持部材の外周面を覆って前記ケーブルを挟持する弾性変形可能な密封部材と、前記保持部材及び前記密封部材の軸方向両側に配置された一対の押圧板と、前記各押圧板を締結し前記密封部材を圧縮変形する締結手段とを備え、前記各押圧板には、その周縁に前記溝部に対応したケーブル係止溝が形成されていることを特徴とする。
【０００９】
請求項１に記載の管路止水装置によれば、保持部材に形成された溝部にケーブルを嵌装し、密封部材を保持部材の外周面に巻き付けて覆う。ケーブルを装着した本管路止水装置を管路内の所定位置に挿入し、締結手段を締め込むことにより一対の押圧板を当接させて密封部材を軸方向に圧縮する。これにより、密封部材は弾性変形して半径方向に膨張し、密封部材の外周面が管路の内周壁に強く密着すると共に、密封部材の内周側でケーブルを密着挟持する。こうして、本管路止水装置は、ケーブルを挿通させた状態で管路を密封し、水または泥等の浸入を防止する。
【００１０】
また、押圧板の周縁に保持部材の溝部に対応してケーブル係止溝が形成されているので、押圧板の外側からケーブルを挿入し溝部に仮止めすることができる。これにより、管路にケーブルが敷設された状態でもケーブルを切断せずに容易に装着することができる。
【００１１】
請求項２に記載の発明は、請求項１に記載の管路止水装置であって、前記締結手段は、一端が一方の前記押圧板の中心に固着され他端が前記保持部材及び他方の前記押圧板の中心を貫通する１本の軸部材と、前記他方の押圧板側で前記軸部材の他端に螺合するナット部材とを備えることを特徴とする。
【００１２】
請求項２に記載の管路止水装置によれば、本管路止水装置を管路の所定位置に挿入後、１本の軸部材及びナット部材からなる締結手段を螺合し締め込むだけで本管路止水装置を設置することができるので、設置の際に取り扱う部品点数が少なく作業性が向上する。
【００１３】
また、１本の軸部材及びナット部材からなる締結手段を緩め、密封部材を取り除くことにより簡単にケーブルを本管路止水装置から取り外すことができるので、本管路止水装置の着脱作業が容易になる。
【００１４】
請求項３に記載の発明は、請求項１に記載の管路止水装置であって、前記締結手段は、一端が一方の前記押圧板に互いに適宜の間隔をおいて固着され他端が前記保持部材及び他方の前記押圧板を貫通する複数の軸部材と、前記他方の押圧板側で前記各軸部材の他端に螺合するナット部材とを備えることを特徴とする。
【００１５】
請求項３に記載の管路止水装置によれば、適宜の間隔をおいて一方の押圧板に固着された複数の軸部材により分散して各押圧板を締結し密封部材を押圧するので、各押圧板の反り等の変形量が少なくなり各押圧板の肉厚をより薄くすることができる。
【００１６】
請求項４に記載の発明は、ケーブルが敷設された管路を密封する管路止水装置であって、略円柱状の外周面に軸方向に沿って前記ケーブルを保持する溝部が形成された保持部材と、前記保持部材の外周面を覆って前記ケーブルを挟持する弾性変形可能な密封部材と、前記保持部材及び前記密封部材の軸方向両側に配置された一対の押圧板と、前記各押圧板を締結し前記密封部材を圧縮変形する締結手段と、前記各押圧板と前記密封部材との間に前記押圧板と同軸に配置され、前記押圧板に対して回動自在に設けられたケーブル係止板とを備え、前記各押圧板にはその周縁に前記溝部に対応した第１ケーブル係止溝が形成されると共に、前記各ケーブル係止板にはその周縁に前記溝部に対応した第２ケーブル係止溝が形成され、前記第１ケーブル係止溝は前記押圧板の中心に向かって形成された縦溝からなり、前記第２ケーブル係止溝は前記ケーブル係止板の中心に向かって形成された縦溝と該縦溝の底部から回動方向に向かって形成された横溝とからなり、前記第１ケーブル係止溝の底部に前記ケーブルを係止した状態で前記ケーブル係止板を回動させて、前記押圧板の縦溝と前記ケーブル係止板の横溝とによって前記ケーブルの周囲を係止することを特徴とする。
【００１７】
請求項４に記載の管路止水装置によれば、押圧板の周縁に保持部材の溝部に対応した第１ケーブル係止溝と、ケーブル係止板の周縁に溝部に対応した第２ケーブル係止溝が形成されているので、押圧板及びケーブル係止板の外側からこれらの縦溝にケーブルを挿入して保持部材に装着することができ、管路にケーブルが敷設された状態でも容易にケーブルを装着することができる。
【００１８】
また、ケーブルを押圧板の第１ケーブル係止溝の底部で係止した状態でケーブル係止板を回動させると、第１ケーブル係止溝の縦溝とケーブル係止板の第２ケーブル係止溝の横溝とでケーブルを挟んで係止する。第１ケーブル係止溝の縦溝と第２ケーブル係止溝の横溝は、ケーブルを係止する位置で交叉するので、ケーブルの周囲ではこれらの溝が塞がれる。これにより、密封部材を圧縮した際に、密封部材の一部が押圧板の第１ケーブル係止溝またはケーブル係止板の第２ケーブル係止溝にはみ出るのを防止する。
【００１９】
請求項５に記載の発明は、ケーブルが敷設された管路を密封する管路止水装置であって、略円柱状の外周面に軸方向に沿って前記ケーブルを保持する溝部が形成された保持部材と、前記保持部材の外周面を覆って前記ケーブルを挟持する弾性変形可能な密封部材と、前記保持部材及び前記密封部材の軸方向両側に配置された一対の押圧板と、前記各押圧板を締結し前記密封部材を圧縮変形する締結手段と、前記各押圧板と前記密封部材との間に前記押圧板と同軸に配置され、前記押圧板に対して回動自在に設けられたケーブル係止板とを備え、前記各ケーブル係止板にはその周縁に前記溝部に対応した第１ケーブル係止溝が形成されると共に、前記各押圧板にはその周縁に前記溝部に対応した第２ケーブル係止溝が形成され、前記第１ケーブル係止溝は前記ケーブル係止板の中心に向かって形成された縦溝からなり、前記第２ケーブル係止溝は前記押圧板の中心に向かって形成された縦溝と該縦溝の底部から回動方向に向かって形成された横溝とからなり、前記第１ケーブル係止溝の底部に前記ケーブルを係止した状態で前記押圧板を回動させて、前記ケーブル係止板の縦溝と前記押圧板の横溝とによって前記ケーブルの周囲を係止することを特徴とする。
【００２０】
請求項５に記載の管路止水装置によれば、ケーブルをケーブル係止板の第１ケーブル係止溝の底部で係止した状態で押圧板を回動させると、第１ケーブル係止溝の縦溝と、押圧板の第２ケーブル係止溝の横溝とでケーブルを挟んで係止する。第１ケーブル係止溝の縦溝と第２ケーブル係止溝の横溝は、ケーブルを係止する位置で交叉するので、ケーブルの周囲ではこれらの溝が塞がれる。これにより、密封部材を圧縮した際に、密封部材の一部がケーブル係止板の第１ケーブル係止溝または押圧板の第２ケーブル係止溝にはみ出るのを防止する。
【００２１】
請求項６に記載の発明は、請求項１〜５の何れか１項に記載の管路止水装置であって、前記密封部材の外周面に溝パターンが形成されていることを特徴とする。
【００２２】
請求項６に記載の管路止水装置によれば、溝パターンが形成された密封部材の外周面を管路の内周壁に密着させることにより、本管路止水装置に水圧等の圧力が作用しても、溝パターン部分が微少に変位し圧力を吸収緩和するので、本管路止水装置を管路内の一定の位置に保持する。
【００２３】
【発明の実施の形態】
本発明の好適な実施形態を図面を参照して説明する。なお、本実施形態は、通信ケーブル等のケーブルが３本敷設された管路の管口部に装着され管路内部への水または泥等の浸入を防止する止水装置について説明する。
【００２４】
図１は、第１の実施形態に係る止水装置の構成を示す分解斜視図である。同図において、本止水装置は、ゴム等の弾性材料からなる保持部材１と、ゴム等の弾性材料からなり保持部材１の外周面に巻き付けて覆う密封部材２と、保持部材１及び密封部材２の後面を押圧する押圧板３と、保持部材１及び密封部材２の前面を押圧する押圧板４と、保持部材１及び密封部材２を挟んで押圧板３、４を締結するボルト３１及びナット５１からなる締結手段を備えて構成されている。
【００２５】
保持部材１は略円柱状を有しており、その外周面には、ケーブルの一部を保持する溝部１１が軸方向（前後方向）に沿って所要数（例えば３箇所）形成されている。そして、溝部１１の軸方向に直交する横断面は、ケーブルの半径とほぼ同じ深さを有する略半円状の輪郭形状となっている。また、保持部材１の側面中心には、軸方向に沿ってボルト孔１２が穿通している。
【００２６】
密封部材２は、一箇所に切断部２２が設けられた環状部材であり、切断部２２を開放することで、保持部材１の外周面を覆うことができるようになっている。また、密封部材２の内周面には、上述の溝部１１に対応する位置に、保持部材１の溝部１１に保持されたケーブルの露出部分を嵌装して挟持する溝部２１が軸方向に沿って所要数形成されている。そして、溝部２１の横断面もケーブルの半径とほぼ同じ深さに形成された略半円状の輪郭形状となっている。
【００２７】
また、保持部材１を覆う密封部材２の外周面には、その周方向に沿って互いに平行な溝が複数刻まれ配列された溝パターン２３が形成されている。
【００２８】
保持部材１に密封部材２を巻き付けて覆った状態では、本止水装置が取り付けられる管路の内径より若干小さな外径になるように、適宜配分された保持部材１の外径、及び密封部材２の肉厚を有している。保持部材１及び密封部材２は、互いに同じ幅を有している。また、保持部材１を密封部材２で覆うことにより、溝部１１、２１が対向してケーブルを挟持するためのケーブル孔が形成される。
【００２９】
押圧板３は、例えばステンレス鋼等からなる略円板状の金属板であり、中心には、押圧面と直交してボルト３１の一端が溶接等で固着されている。そして、ボルト３１の他端には、ねじ部３４が螺刻されている。
【００３０】
また、押圧板３の周縁部分には、保持部材１の溝部１１に対応する位置に、ケーブルを係止するケーブル係止溝３２が所要数形成されている。このケーブル係止溝３２は、押圧板３の周縁で開口し、中心方向にあるケーブルを係止する位置まで略直線状にケーブルの径よりも若干大きい幅で欠切した縦溝となっており、ケーブル係止溝３２のケーブルを係止する底部は、上述の溝部１１及び２１からなるケーブル孔を囲むように湾曲した形状となっている。
【００３１】
押圧板４は、押圧板３と同様のケーブル係止溝４２が形成されたステンレス鋼等からなる略円板状の金属板であり、中心には、ボルト３１の軸を挿通させるボルト孔４１が穿孔されている。
【００３２】
締結手段は、押圧板３に固着された軸部材としてのボルト３１とナット５１とを備え構成されており、押圧板３と押圧板４で保持部材１及び密封部材２を挟み、ワッシャ５２を介してナット５１をボルト３１のねじ部３４に螺合し締め込むことにより、保持部材１及び密封部材２を軸方向に押圧し圧縮する。
【００３３】
次に、上述の止水装置を管路に取り付ける方法、及び動作を説明する。まず、保持部材１のボルト孔１２にボルト３１の軸を挿入して保持部材１の後面に押圧板３を当接させ、押圧板４のボルト孔４１にボルト３１の軸を挿入して保持部材１の前面に押圧板４を当接させる。そして、押圧板３、４を適宜回動させ、保持部材１の溝部１１と、押圧板３、４のケーブル係止溝３２、４２の位置を一致させる。ケーブル係止溝３２、４２の位置決めを行った後、ワッシャ５２を介してナット５１をボルト３１のねじ部３４に仮螺合する。このような本止水装置の仮組みを現場作業の前に予め行っておく。
【００３４】
次に、作業現場において、仮組みした本止水装置にケーブルＣを装着する。図２は、ケーブルＣを本止水装置に装着する方法を示す図である。同図に示すように、仮組みした本止水装置の外側から、押圧板３、４のケーブル係止溝３２、４２と交叉するようにケーブルＣを挿入し、保持部材１の溝部１１にケーブルＣの一部分を嵌装することでケーブルＣを仮止めする。そして、密封部材２の切断部２２を開きながら溝部２１にケーブルＣの他の部分を嵌装させて保持部材１を密封部材２で巻き付けて覆う。こうして、保持部材１は、溝部１１でケーブルＣを保持し、密封部材２の溝部２１でケーブルＣを挟持する。
【００３５】
図３は、管路Ｐに取り付けた本止水装置の部分縦断面図である。同図に示すように、ケーブルＣを装着した本止水装置を管路Ｐの管口部から所定の位置まで挿入する。そして、ナット５１を螺合し高トルクで締め込むことにより、押圧板３、４を当接させて保持部材１及び密封部材２を軸方向に圧縮する。これにより、保持部材１及び密封部材２は半径方向に膨張し、密封部材２の外周面が管路Ｐの内周壁に強く密着する。また同時に、密封部材２の内周側でケーブルＣに対して押圧力が作用し、ケーブルＣを溝部１１、２１で密着挟持する。このようにして、本止水装置は、ケーブルＣを挿通させた状態で管路Ｐの管口部を密封し、外部からの水または泥等の浸入を防止する。
【００３６】
第１の実施形態に係る止水装置によれば、保持部材１に形成された溝部１１にケーブルＣを嵌装し、密封部材２を保持部材１の外周面に巻き付けて覆う。ケーブルＣを装着した本止水装置を管路Ｐ内の所定位置に挿入し、締結手段を締め込むことにより、押圧板３、４を当接させて保持部材１及び密封部材２を軸方向に圧縮する。これにより、保持部材１及び密封部材２は弾性変形して半径方向に膨張し、密封部材２の外周面が管路Ｐの内周壁に強く密着する。また同時に、密封部材２の内周側で押圧力が作用しケーブルＣを密着挟持する。こうして、本止水装置は、ケーブルＣを挿通させた状態で管路Ｐの管口部を密封し、水または泥等が外部から管路Ｐ内へ浸入するのを防止することができる。
【００３７】
また、押圧板３、４の周縁に保持部材１の溝部１１に対応してケーブル係止溝３２、４２が形成されているので、仮組みした押圧板３、４の外側からケーブルＣを挿入して保持部材１の溝部１１に装着することができる。したがって、管路ＰにケーブルＣが敷設された状態でも、ケーブルＣを切断せずに容易に装着することができる。
【００３８】
また、予め保持部材１及び押圧板３、４を仮組みした本止水装置にケーブルＣを装着して管路内に挿入後、１本のボルト３１及びナット５１からなる締結手段を締め込むだけで本止水装置を設置することができ、設置の際に取り扱う部品点数が少なく作業性が向上する。
【００３９】
また、本止水装置は、１本のボルト３１及びナット５１からなる締結手段を緩めることにより、簡単に管路Ｐから抜き取ることができると共に、保持部材１を覆っている密封部材２を取り除くことで容易にケーブルＣを取り外すことができる。したがって、本止水装置は、ケーブルＣが敷設されている管路でも着脱作業が容易であり、ケーブルＣの追い張り等に伴う装置の交換作業に迅速に対応することができる。
【００４０】
また、溝パターン２３が形成された密封部材２の外周面を管路Ｐの内周壁に密着させることにより、本止水装置に水圧等の圧力が作用しても、溝パターン２３部分が微少に変位して圧力を吸収緩和するので、本止水装置は、管路Ｐ内で滑ることなく一定の位置に保持される。
【００４１】
次に、第１の実施形態の変形である第２の実施形態を説明する。図４は、第２の実施形態に係る止水装置の構成を示す分解斜視図である。なお、図１〜３で示した第１の実施形態と同一の構成要素を同一の符号で示している。
【００４２】
同図において、本止水装置は、ゴム等の弾性材料からなる保持部材１と、ゴム等の弾性材料からなり保持部材１の外周面に巻き付けて覆う密封部材２と、保持部材１及び密封部材２の後面を押圧する押圧板３と、保持部材１及び密封部材２の前面を押圧する押圧板４と、保持部材１及び密封部材２を挟んで押圧板３、４を締結する複数のボルト３１ａ、３１ｂ、３１ｃ及び複数のナット５１ａ、５１ｂ、５１ｃ等からなる締結手段を備えて構成されている。
【００４３】
ボルト３１ａ、３１ｂ、３１ｃの一端側は、押圧板３に適宜の間隔をおいて各々固着されている。保持部材１の側面には、ボルト３１ａ、３１ｂ、３１ｃを嵌挿するボルト孔１２ａ、１２ｂ、１２ｃが各々対応する位置に穿通している。また、押圧板４にも、ボルト３１ａ、３１ｂ、３１ｃを嵌挿するボルト孔４１ａ、４１ｂ、４１ｃが各々対応する位置に穿通している。
【００４４】
上述の止水装置を管路Ｐに取り付ける方法、及び動作を説明する。まず、保持部材１のボルト孔１２ａ、１２ｂ、１２ｃ、及び押圧板４のボルト孔４１ａ、４１ｂ、４１ｃにボルト３１ａ、３１ｂ、３１ｃの軸を挿入し、ワッシャ５２ａ、５２ｂ、５２ｃを介してナット５１ａ、５１ｂ、５１ｃにより仮螺合する。このようにして仮組みした本止水装置にケーブルＣを装着し、密封部材２で保持部材１を覆う。ケーブルＣが装着された本止水装置を管路Ｐに挿入後、ナット５１ａ、５１ｂ、５１ｃを高トルクで締め込み、押圧板３、４を当接させて保持部材１及び密封部材２を軸方向に圧縮する。これにより、保持部材１及び密封部材２は半径方向に膨張し、密封部材２の外周面が管路Ｐの内周壁に強く密着する。また同時に、密封部材２の内周側でケーブルＣに対して押圧力が作用し、ケーブルＣを溝部１１、２１で密着挟持する。このように、本止水装置は、ケーブルＣを挿通させた状態で管路Ｐの管口部を密封し、水または泥等が外部から管路Ｐ内へ浸入するのを防止する。
【００４５】
第２の実施形態に係る止水装置によれば、適宜の間隔をおいて配置された複数のボルト３１ａ、３１ｂ、３１ｃにより分散して押圧板３、４を締結し保持部材１及び密封部材２を押圧する。それにより、１本のボルトで締結するのに比較して、押圧板３、４の反り等の変形量が少なくなり、押圧板３、４の肉厚をより薄くすることができる。
【００４６】
次に、第１の実施形態の更なる変形である第３の実施形態を説明する。図５は、第３の実施形態に係る止水装置の構成を示す分解斜視図である。なお、図１〜３で示した第１の実施形態と同一の構成要素を同一の符号で示している。
【００４７】
同図において、本止水装置は、ゴム等の弾性材料からなる保持部材１と、ゴム等の弾性材料からなり保持部材１の外周面に巻き付けて覆う密封部材２と、保持部材１及び密封部材２の後面側を押圧する押圧板３と、保持部材１及び密封部材２の前面側を押圧する押圧板４と、押圧板３と保持部材１及び密封部材２の間に介在するケーブル係止板６と、押圧板４と保持部材１及び密封部材２の間に介在するケーブル係止板７と、保持部材１及び密封部材２を挟んで押圧板３、４を締結するボルト３１及びナット５１からなる締結手段を備えて構成されている。
【００４８】
ケーブル係止板６は、例えばステンレス鋼等からなる略円板状の金属板であり、中心にボルト３１の軸を挿通するためのボルト孔６１が穿孔されている。
【００４９】
また、ケーブル係止板６の周縁には、保持部材１の溝部１１に対応する位置にケーブルＣを係止するケーブルＣの径よりも若干大きい幅のケーブル係止溝６２が所要数形成されている。このケーブル係止溝６２は、ケーブル係止板６の周縁に開口しケーブル係止板６の中心に向かって略直線状に欠切した縦溝と、当該縦溝の底部からボルト孔６１の中心を軸とする所定の回動方向に向かって円弧状に欠切した横溝６３とから形成されている。
【００５０】
ケーブル係止板７は、ケーブル係止板６と同様のボルト孔７１、ケーブル係止溝７２、及び横溝７３が形成されたステンレス鋼等からなる金属板である。
【００５１】
パッキン８は、ボルト孔６１とほぼ同一の内径を有する円環状のシール材からなり、ケーブル係止板６の押圧板３側で、ボルト孔６１の周縁を囲むように接着される。または、パッキン８を、ケーブル係止板６と押圧板３の間に介在させ、ボルト３１の軸にパッキン８を巻き付けて装着してもよい。
【００５２】
次に、上述の止水装置を管路Ｐに取り付ける方法、及び動作を説明する。まず、ケーブル係止板６と押圧板３の間にパッキン８を介在させて、ケーブル係止板６のボルト孔６１にボルト３１の軸を挿入する。そして、保持部材１のボルト孔１２にボルト３１の軸を挿入して保持部材１の後面にケーブル係止板６を当接させる。次に、ケーブル係止板７のボルト孔７１にボルト３１の軸を挿入して、保持部材１の前面にケーブル係止板７を当接させる。そして、押圧板４のボルト孔４１にボルト３１の軸を挿入して、ケーブル係止板７に押圧板４を当接させる。なお、ケーブル係止板６、７は、ボルト３１を共通軸として押圧板３、４に対して回動自在となっている。
【００５３】
次に、押圧板３、４及びケーブル係止板６、７を適宜回動させ、保持部材１の溝部１１、押圧板３、４のケーブル係止溝３２、４２、及びケーブル係止板６、７のケーブル係止溝６２、７２の位置を各々一致させる。そして、ワッシャ５２を介してナット５１をボルト３１のねじ部３４に仮螺合する。
【００５４】
このような本止水装置の仮組みを予め行っておき、作業現場において、仮組みした本止水装置にケーブルＣを装着する。図６は、仮組みした本止水装置にケーブルＣを装着した斜視図である。
【００５５】
まず、仮組みした本止水装置の外側から、押圧板３、４のケーブル係止溝３２、４２、及びケーブル係止板６、７のケーブル係止溝６２、７２の各縦溝にケーブルＣを挿入し、保持部材１の溝部１１にケーブルＣの一部分を嵌装する。
【００５６】
ケーブルＣを所要数装着した後、ケーブルＣを押圧板３のケーブル係止溝３２の底部に係止した状態でケーブル係止板６を矢示方向に回動させて、ケーブルＣをケーブル係止溝３２の縦溝とケーブル係止溝６２の横溝６３とで挟み周囲を係止する。このとき、ケーブル係止溝３２の縦溝とケーブル係止溝６２の横溝６３は、ケーブルＣを係止する位置で交叉するので、ケーブルＣの周囲ではこれらの溝が塞がれる。
【００５７】
同様に、ケーブル係止板７を所定方向に回動させて、ケーブルＣを押圧板４のケーブル係止溝４２の縦溝とケーブル係止溝７２の横溝７３とで挟み係止する。ケーブル係止溝４２とケーブル係止溝７２はケーブルＣの周囲で塞がれる。
【００５８】
次に、密封部材２を保持部材１に巻き付けて覆い、本止水装置を管路Ｐに挿入する。そして、ナット５１を高トルクで締め込むことにより、押圧板３、４及びケーブル係止板６、７を介して保持部材１及び密封部材２を軸方向に圧縮する。このとき、ケーブルＣの周囲で、押圧板３、４に形成されたケーブル係止溝３２、４２とケーブル係止板６、７に形成されたケーブル係止溝６２、７２とは塞がれているので、保持部材１または密封部材２の一部がこれらのケーブル係止溝３２、４２、６２、７２にはみ出ることはない。
【００５９】
また、パッキン８は、ケーブル係止板６及び押圧板３の隙間と、保持部材１のボルト孔１２とを密封し、これらの間における水または泥等の移動を防止する。
【００６０】
第３の実施形態に係る止水装置によれば、保持部材１の溝部１１に対応して、押圧板３、４の周縁にケーブル係止溝３２、４２が形成され、またケーブル係止板６、７の周縁にケーブル係止溝６２、７２が形成されているので、仮組みした押圧板３、４及びケーブル係止板６、７の外側からケーブルＣを挿入し保持部材１に装着することができ、管路ＰにケーブルＣが敷設された状態でも、ケーブルＣを切断せずに容易に装着することができる。
【００６１】
また、ケーブル係止板６、７を所定方向に回動させることにより、ケーブルＣを押圧板３、４のケーブル係止溝３２、４２及びケーブル係止板６、７のケーブル係止溝６２、７２に挟んで係止することができる。同時に、ケーブルＣの周囲では、ケーブル係止溝３２、４２とケーブル係止溝６２、７２は塞がれているので、保持部材１及び密封部材２を軸方向に圧縮した際に、保持部材１または密封部材２の一部が押圧板３、４のケーブル係止溝３２、４２またはケーブル係止板６、７のケーブル係止溝６２、７２にはみ出るのを防止する。したがって、保持部材１または密封部材２がはみ出ることにより生じる亀裂等により密封性が損なわれるのを未然に防止することができる。
【００６２】
また、保持部材１または密封部材２のはみ出しが防止されるので、押圧板３、４を介して保持部材１及び密封部材２の両側のほぼ全面を均等に押圧することができる。それにより、密封部材２の外周面が管路Ｐの内周壁に均等に密着し、密封性能が向上する。
【００６３】
次に、第３の実施形態の変形である第４の実施形態を説明する。図７は、第３の実施形態に係る止水装置の構成を示す分解斜視図である。なお、図５及び６で示した第３の実施形態と同一の構成要素を同一符号で示している。
【００６４】
同図において、本止水装置は、ゴム等の弾性材料からなる保持部材１と、ゴム等の弾性材料からなり保持部材１の外周面に巻き付けて覆う密封部材２と、保持部材１及び密封部材２の後面側を押圧する押圧板３と、保持部材１及び密封部材２の前面側を押圧する押圧板４と、押圧板３と保持部材１及び密封部材２の間に介在するケーブル係止板６と、押圧板４と保持部材１及び密封部材２の間に介在するケーブル係止板７と、保持部材１及び密封部材２を挟んで押圧板３、４を締結するボルト３１及びナット５１からなる締結手段を備えて構成されている。
【００６５】
ケーブル係止板６、７の周縁部分には、保持部材１の溝部１１に対応する位置に、ケーブルＣを係止するケーブル係止溝６２、７２が所要数形成されている。このケーブル係止溝６２、７２は、ケーブル係止板６、７の周縁に開口し、中心方向にあるケーブルＣを係止する位置まで略直線状にケーブルＣの径よりも若干大きい幅で欠切した縦溝となっており、その底部はケーブルＣを囲むように湾曲した形状となっている。
【００６６】
押圧板３、４の周縁には、保持部材１の溝部１１に対応する位置に、ケーブルＣを係止するケーブル係止溝３２、４２がケーブルＣの径よりも若干広い幅で所要数形成されている。これらのケーブル係止溝３２、４２は、押圧板３、４の周縁に開口し押圧板３、４の中心に向かって略直線状に欠切した縦溝と、当該縦溝の底部からボルト３１の中心を軸とする所定の回動方向に向かって円弧状に欠切した横溝３３、４３とから形成されている。
【００６７】
次に、上述の止水装置を管路Ｐに取り付ける方法、及び動作を説明する。まず、ケーブル係止板６と押圧板３の間にパッキン８を介在させて、ケーブル係止板６のボルト孔６１にボルト３１の軸を挿入する。そして、保持部材１のボルト孔１２にボルト３１の軸を挿入して保持部材１の後面にケーブル係止板６を当接させる。次に、ケーブル係止板７のボルト孔７１にボルト３１の軸を挿入して、保持部材１の前面に、ケーブル係止板７を当接させる。そして、押圧板４のボルト孔４１にボルト３１の軸を挿入して、ケーブル係止板７に押圧板４を当接させる。
【００６８】
次に、押圧板３、４及びケーブル係止板６、７を適宜回動させ、保持部材１の溝部１１、押圧板３、４のケーブル係止溝３２、４２、及びケーブル係止板６、７のケーブル係止溝６２、７２の位置を各々一致させる。そして、ワッシャ５２を介してナット５１をボルト３１のねじ部３４に仮螺合する。
【００６９】
このような本止水装置の仮組みを予め行っておき、仮組みした本止水装置の外側から、押圧板３、４のケーブル係止溝３２、４２、及びケーブル係止板６、７のケーブル係止溝６２、７２の各縦溝にケーブルＣを挿入し、保持部材１の溝部１１にケーブルＣの一部分を嵌装する。
【００７０】
ケーブルＣを所要数装着した後、ケーブルＣをケーブル係止板６、７のケーブル係止溝６２、７２の底部に係止した状態で押圧板３、４を所定の回動方向に回動させて、ケーブルＣをケーブル係止溝６２、７２の縦溝とケーブル係止溝３２、４２の横溝３３、４３とで挟み周囲を係止する。このとき、ケーブル係止溝６２、７２の縦溝とケーブル係止溝３２、４２の横溝３３、４３は、ケーブルＣを係止する位置で交叉するので、ケーブルＣの周囲ではこれらの溝が塞がれる。
【００７１】
次に、密封部材２を保持部材１に巻き付けて覆い、本止水装置を管路Ｐに挿入する。そして、ナット５１を高トルクで締め込むことにより、押圧板３、４及びケーブル係止板６、７を介して保持部材１及び密封部材２を軸方向に圧縮する。このとき、ケーブルＣの周囲では、押圧板に形成されたケーブル係止溝３２、４２とケーブル係止板６、７に形成されたケーブル係止溝６２、７２とは塞がれているので、保持部材１または密封部材２の一部がこれらのケーブル係止溝３２、４２、６２、７２にはみ出ることはない。
【００７２】
第４の実施形態に係る止水装置によれば、保持部材１の溝部１１に対応して、押圧板３、４の周縁にケーブル係止溝３２、４２が形成され、またケーブル係止板６、７の周縁にケーブル係止溝６２、７２が形成されているので、仮組みした押圧板３、４及びケーブル係止板６、７の外側からケーブルＣを挿入して溝部１１に装着することができ、管路ＰにケーブルＣが敷設された状態でも、ケーブルＣを切断せずに容易に装着することができる。
【００７３】
また、押圧板３、４を所定方向に回動させることにより、ケーブルＣを押圧板３、４のケーブル係止溝３２、４２及びケーブル係止板６、７のケーブル係止溝６２、７２に挟んで係止することができる。同時に、ケーブルＣの周囲では、ケーブル係止溝３２、４２とケーブル係止溝６２、７２は塞がれているので、保持部材１及び密封部材２を軸方向に圧縮した際に、保持部材１または密封部材２の一部が押圧板３、４のケーブル係止溝３２、４２またはケーブル係止板６、７のケーブル係止溝６２、７２にはみ出るのを防止する。したがって、保持部材１または密封部材２がはみ出ることにより生じる亀裂等により密封性が損なわれるのを未然に防止することができる。
【００７４】
また、保持部材１または密封部材２のはみ出しが防止されるので、押圧板３、４を介して保持部材１及び密封部材２の両側のほぼ全面を均等に押圧することができる。それにより、密封部材２の外周面が管路Ｐの内周壁に均等に密着し、密封性能が向上する。
【００７５】
なお、上述の実施形態では、３本のケーブルが敷設された管路の止水装置について説明したが、本発明は、ケーブル本数をこれに限定するものではなく、敷設されるケーブル本数に合わせて適宜数、溝部１１、２１、ケーブル係止溝３２、４２、６２、７２等を形成してもよい。
【００７６】
【発明の効果】
請求項１に記載の管路止水装置によれば、保持部材に形成された溝部にケーブルを嵌装し、密封部材を保持部材の外周面に巻き付けて覆う。ケーブルを装着した本管路止水装置を管路内の所定位置に挿入し、締結手段を締め込むことにより、一対の押圧板を当接させて密封部材を軸方向に圧縮する。これにより、密封部材は弾性変形して半径方向に膨張し、密封部材の外周面が管路の内周壁に強く密着すると同時に、密封部材の内周側でケーブルを密着挟持する。こうして、本管路止水装置は、ケーブルを挿通させた状態で管路を密封し、水または泥等の浸入を防止することができる。
【００７７】
また、押圧板の周縁に溝部に対応してケーブル係止溝が形成されているので、押圧板の外側からケーブルを挿入して溝部に仮止めすることができる。これにより、管路にケーブルが敷設された状態でも、ケーブルを切断せずに容易に装着することができる。したがって、ケーブルの追い張り等の作業性が向上する。
【００７８】
請求項２に記載の管路止水装置によれば、本管路止水装置を管路の所定位置に挿入後、１本の軸部材及びナット部材からなる締結手段を螺合し締め込むだけで本管路止水装置を設置することができるので、設置の際に取り扱う部品点数が少なく作業性が向上する。
【００７９】
また、１本の軸部材及びナット部材からなる締結手段を緩め、密封部材を取り除くことにより簡単にケーブルを本管路止水装置から取り外すことができるので、本管路止水装置の着脱作業が容易になる。
【００８０】
請求項３に記載の管路止水装置によれば、適宜の間隔をおいて一方の押圧板に固着された複数の軸部材により分散して各押圧板を締結し、密封部材を押圧するので、各押圧板の反り等の変形量が少なくなり各押圧板の肉厚をより薄くすることができる。
【００８１】
請求項４に記載の管路止水装置によれば、押圧板の周縁に保持部材の溝部に対応した第１ケーブル係止溝と、ケーブル係止板の周縁に溝部に対応した第２ケーブル係止溝が形成されているので、押圧板及びケーブル係止板の外側からこれらの縦溝にケーブルを挿入して保持部材の溝部に装着することができ、管路にケーブルが敷設された状態でも容易にケーブルを装着することができる。
【００８２】
また、ケーブルを押圧板の第１ケーブル係止溝の底部で係止した状態でケーブル係止板を回動させると、第１ケーブル係止溝の縦溝とケーブル係止板の第２ケーブル係止溝の横溝とでケーブルを挟んで係止する。第１ケーブル係止溝の縦溝と第２ケーブル係止溝の横溝は、ケーブルを係止する位置で交叉するので、ケーブルの周囲ではこれらの溝が塞がれる。これにより、密封部材を圧縮した際に、密封部材の一部が押圧板の第１ケーブル係止溝またはケーブル係止板の第２ケーブル係止溝にはみ出るのを防止することができる。
【００８３】
したがって、密封部材がはみ出ることにより生じる亀裂等により密封性が損なわれるのを未然に防止することができる。
【００８４】
また、密封部材のはみ出しを防止するので、押圧板及びケーブル係止板を介して密封部材の両側のほぼ全面を均等に押圧することができる。それにより、密封部材の外周面が管路の内周壁に均等に密着し、密封性能が向上する。
【００８５】
請求項５に記載の管路止水装置によれば、ケーブルをケーブル係止板の第１ケーブル係止溝の底部で係止した状態で押圧板を回動させると、第１ケーブル係止溝の縦溝と押圧板の第２ケーブル係止溝の横溝とでケーブルを挟んで係止する。第１ケーブル係止溝の縦溝と第２ケーブル係止溝の横溝は、ケーブルを係止する位置で交叉するので、ケーブルの周囲ではこれらの溝が塞がれる。これにより、密封部材を圧縮した際に、密封部材の一部がケーブル係止板の第１ケーブル係止溝または押圧板の第２ケーブル係止溝にはみ出るのを防止する。
【００８６】
したがって、密封部材がはみ出ることにより生じる亀裂等により密封性が損なわれるのを未然に防止することができる。
【００８７】
また、密封部材のはみ出しを防止するので、押圧板及びケーブル係止板を介して密封部材の両側のほぼ全面を均等に押圧することができる。それにより、密封部材の外周面が管路の内周壁に均等に密着し、密封性能が向上する。
【００８８】
請求項６に記載の管路止水装置によれば、溝パターンが形成された密封部材の外周面を管路の内周壁に密着させることにより、本管路止水装置に水圧等の圧力が作用しても、溝パターン部分が微少に変位し圧力を吸収緩和するので、本管路止水装置を管路内の一定の位置に保持することができる。
【図面の簡単な説明】
【図１】第１の実施形態に係る止水装置の構成を示す分解斜視図である。
【図２】第１の実施形態に係る止水装置にケーブルＣを装着する方法を示す斜視図である。
【図３】管路に取り付けた第１の実施形態に係る止水装置の部分断面図である。
【図４】第２の実施形態に係る止水装置の構成を示す分解斜視図である。
【図５】第３の実施形態に係る止水装置の構成を示す分解斜視図である。
【図６】第３の実施形態に係る止水装置にケーブルＣを装着した斜視図である。
【図７】第４の実施形態に係る止水装置の構成を示す分解斜視図である。
【符号の説明】
１…保持部材、１１…溝部、１２…ボルト孔
２…密封部材、１２…溝部、２２…切断部
２３…溝パターン
３…押圧板、３１…ボルト（軸部材）
３２…ケーブル係止溝、３３…横溝、３４…ねじ部
４…押圧板、４１…ボルト孔、
４２…ケーブル係止溝、４３…横溝
５１…ナット（ナット部材）、５２…ワッシャ
６…ケーブル係止板、６１…ボルト孔
６２…ケーブル係止溝、６３…横溝
７…ケーブル係止板、７１…ボルト孔
７２…ケーブル係止溝、７３…横溝
８…パッキン
Ｃ…ケーブル、Ｐ…管路[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pipeline water stop device that prevents water or mud from entering into a pipeline in which a communication cable or the like is laid.
[0002]
[Prior art]
In recent years, power supply and telecommunications using underground cables have been widely performed. Various cables such as such communication cables are laid from underground information boxes, electric wire joint grooves, or sewer pipes to underground facilities such as buildings and general houses through dedicated pipelines. If rainwater, sewage, sludge, etc. penetrates into such conduits as communication lines buried underground, the corrosion deterioration of cables may be accelerated, and rainwater etc. may be drawn into underground facilities such as buildings. Therefore, it is necessary to seal and waterproof the mouth of the pipeline. In order to cope with such a problem, various water shutoff devices (waterproof structures) for sealing a pipe mouth have been proposed.
[0003]
For example, in the waterproof device described in Patent Document 1, a cylindrical seal block body made of an elastic material is inserted and arranged in a pipe, and a cable is inserted through an insertion hole formed in the seal block body to form a seal block. A plurality of fan-shaped divided tightening plates arranged on both front and rear sides of the body are fastened and pressed by tightening bolts and nuts to expand the seal block body in the radial direction. As a result, the outer peripheral surface of the seal block body is in close contact with the inner peripheral surface of the conduit, and the inner peripheral surface of the insertion hole is in close contact with the outer peripheral surface of the cable, thereby preventing water from entering the conduit. I have.
[0004]
[Patent Document 1]
JP 2000-320736 A (FIG. 1)
[0005]
[Problems to be solved by the invention]
By the way, there is a case where a new cable is added to a pipeline in which a communication cable or the like is already laid, so that the cable is extended (pushed up) due to a change in the power or communication usage of the customer. In order to prepare for such a case, it is required that a water stop device for preventing intrusion of water or the like into the pipeline is capable of coping with a change in the number of laid cables.
[0006]
However, in the conventional waterproofing device as described above, at the time of attaching and detaching the device in accordance with the cable chasing work, each of the bolts fastening the plurality of divided tightening boards is removed to remove the seal block body. After inserting the seal block body corresponding to the number of newly laid cables into the pipeline, it is necessary to further tighten a plurality of divided tightening boards by bolting. As described above, the conventional waterproofing device has a large number of parts to be handled in the attaching / detaching operation of the device, and the on-site operation is complicated.
[0007]
The present invention has been made in view of such problems, and for example, to provide a pipeline water stopping device that has a small number of parts, can be easily attached and detached, or can quickly respond to construction such as chasing. Aim.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is a pipeline water stopping device that seals a pipeline in which a cable is laid, wherein a groove for holding the cable is formed along an axial direction on a substantially cylindrical outer peripheral surface. A holding member, an elastically deformable sealing member that covers the outer peripheral surface of the holding member and sandwiches the cable, a pair of pressing plates disposed on both axial sides of the holding member and the sealing member, and each of the pressing members. Fastening means for fastening a plate and compressively deforming the sealing member, wherein each of the pressing plates is formed with a cable locking groove corresponding to the groove at a peripheral edge thereof.
[0009]
According to the pipeline water stop device of the first aspect, the cable is fitted into the groove formed in the holding member, and the sealing member is wound around the outer peripheral surface of the holding member to cover the sealing member. The water stopping device with the cable attached thereto is inserted into a predetermined position in the conduit, and the sealing member is tightened to bring the pair of pressing plates into contact to compress the sealing member in the axial direction. As a result, the sealing member elastically deforms and expands in the radial direction, so that the outer peripheral surface of the sealing member strongly adheres to the inner peripheral wall of the conduit, and the cable is tightly clamped on the inner peripheral side of the sealing member. In this way, the present pipeline water blocking device seals the pipeline while the cable is inserted, and prevents water or mud from entering.
[0010]
Further, since the cable locking groove is formed on the peripheral edge of the pressing plate corresponding to the groove of the holding member, the cable can be inserted from the outside of the pressing plate and temporarily fixed to the groove. Thereby, even if the cable is laid in the pipeline, the cable can be easily attached without cutting the cable.
[0011]
The invention according to claim 2 is the pipeline water stopping device according to claim 1, wherein the fastening means has one end fixed to the center of one of the pressing plates and the other end connected to the holding member and the other. It is characterized by comprising one shaft member penetrating the center of the pressing plate, and a nut member screwed to the other end of the shaft member on the other pressing plate side.
[0012]
According to the pipe water stop device of the second aspect, after inserting the water stop device into the predetermined position of the pipe, the fastening means consisting of one shaft member and the nut member is simply screwed and tightened. Therefore, since the main water stop device can be installed, the number of parts handled at the time of installation is small, and workability is improved.
[0013]
Further, since the cable can be easily removed from the main water stop device by loosening the fastening means composed of one shaft member and the nut member and removing the sealing member, the attaching / detaching operation of the main water stop device can be performed. It will be easier.
[0014]
The invention according to claim 3 is the pipeline water stopping device according to claim 1, wherein the fastening means has one end fixed to one of the pressing plates at an appropriate distance from each other, and the other end has the other end. A shaft member penetrating the holding member and the other pressing plate, and a nut member screwed to the other end of each of the shaft members on the other pressing plate side are provided.
[0015]
According to the pipeline water stopping device according to claim 3, since the plurality of shaft members fixed to one of the pressing plates at appropriate intervals disperse and press each of the pressing plates to press the sealing member, The amount of deformation such as warpage of each pressing plate is reduced, and the thickness of each pressing plate can be reduced.
[0016]
The invention according to claim 4 is a pipeline water stopping device for sealing a pipeline in which a cable is laid, wherein a groove portion for holding the cable is formed along an axial direction on a substantially cylindrical outer peripheral surface. A holding member, an elastically deformable sealing member that covers the outer peripheral surface of the holding member and sandwiches the cable, a pair of pressing plates disposed on both axial sides of the holding member and the sealing member, and each of the pressing members. A fastening means for fastening a plate and compressively deforming the sealing member; and a cable disposed coaxially with the pressing plate between each of the pressing plates and the sealing member and provided rotatably with respect to the pressing plate. A first cable locking groove corresponding to the groove portion is formed on a peripheral edge of each pressing plate, and a first cable locking groove corresponding to the groove portion is formed on a peripheral edge of each cable locking plate. (2) The first cable is formed with a cable locking groove. The locking groove includes a vertical groove formed toward the center of the pressing plate, and the second cable locking groove includes a vertical groove formed toward the center of the cable locking plate and a bottom portion of the vertical groove. The cable locking plate is rotated in a state where the cable is locked to the bottom of the first cable locking groove, and the vertical groove of the pressing plate is formed. The periphery of the cable is locked by the lateral groove of the cable locking plate.
[0017]
According to the pipeline water stopping device of the fourth aspect, the first cable engaging groove corresponding to the groove of the holding member is provided on the periphery of the pressing plate, and the second cable engaging groove corresponding to the groove is provided on the periphery of the cable engaging plate. Since the stop groove is formed, the cable can be inserted into these vertical grooves from outside the pressing plate and the cable locking plate and attached to the holding member, and easily even in a state where the cable is laid in the pipeline. Cable can be attached.
[0018]
Further, when the cable locking plate is rotated in a state where the cable is locked at the bottom of the first cable locking groove of the pressing plate, the vertical groove of the first cable locking groove and the second cable lock of the cable locking plate are rotated. The cable is interposed and locked with the lateral groove of the stop groove. Since the vertical groove of the first cable locking groove and the horizontal groove of the second cable locking groove intersect at the position where the cable is locked, these grooves are closed around the cable. This prevents a part of the sealing member from protruding into the first cable locking groove of the pressing plate or the second cable locking groove of the cable locking plate when the sealing member is compressed.
[0019]
The invention according to claim 5 is a pipeline water stop device that seals a pipeline in which a cable is laid, wherein a groove portion that holds the cable is formed along an axial direction on a substantially cylindrical outer peripheral surface. A holding member, an elastically deformable sealing member that covers the outer peripheral surface of the holding member and sandwiches the cable, a pair of pressing plates disposed on both axial sides of the holding member and the sealing member, and each of the pressing members. A fastening means for fastening a plate and compressively deforming the sealing member; and a cable disposed coaxially with the pressing plate between each of the pressing plates and the sealing member and provided rotatably with respect to the pressing plate. A locking plate, wherein each of the cable locking plates has a first cable locking groove formed on the periphery thereof corresponding to the groove portion, and each of the pressing plates has a first cable locking groove formed on the periphery thereof corresponding to the groove portion. (2) The first cable is formed with a cable locking groove. The locking groove includes a vertical groove formed toward the center of the cable locking plate, and the second cable locking groove includes a vertical groove formed toward the center of the pressing plate and a bottom of the vertical groove. The pressing plate is rotated in a state where the cable is locked at the bottom of the first cable locking groove, and the vertical groove of the cable locking plate is formed. The periphery of the cable is locked by the lateral groove of the pressing plate.
[0020]
According to the pipe water stopping device of the fifth aspect, when the pressing plate is rotated while the cable is locked at the bottom of the first cable locking groove of the cable locking plate, the first cable locking groove is formed. The cable is sandwiched and locked between the vertical groove and the horizontal groove of the second cable locking groove of the pressing plate. Since the vertical groove of the first cable locking groove and the horizontal groove of the second cable locking groove intersect at the position where the cable is locked, these grooves are closed around the cable. This prevents a part of the sealing member from protruding into the first cable locking groove of the cable locking plate or the second cable locking groove of the pressing plate when the sealing member is compressed.
[0021]
The invention according to claim 6 is the pipeline water stop device according to any one of claims 1 to 5, wherein a groove pattern is formed on an outer peripheral surface of the sealing member. .
[0022]
According to the pipeline water stop device of the sixth aspect, by bringing the outer peripheral surface of the sealing member having the groove pattern into close contact with the inner circumferential wall of the pipeline, pressure such as water pressure is applied to the water stop device. Even if it acts, the groove pattern portion is slightly displaced and absorbs and relaxes the pressure, so that the present pipeline water stop device is held at a fixed position in the pipeline.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
A preferred embodiment of the present invention will be described with reference to the drawings. In the present embodiment, a water stop device that is attached to a pipe opening of a pipe in which three cables such as a communication cable are laid to prevent water or mud from entering the inside of the pipe will be described.
[0024]
FIG. 1 is an exploded perspective view showing the configuration of the water stoppage device according to the first embodiment. In this figure, the present water stop device includes a holding member 1 made of an elastic material such as rubber, a sealing member 2 made of an elastic material such as rubber and wound around the outer peripheral surface of the holding member 1, a holding member 1 and a sealing member. 2, a pressing plate 3 for pressing the rear surface, a pressing plate 4 for pressing the front surfaces of the holding member 1 and the sealing member 2, and a bolt 31 and a nut for fastening the pressing plates 3, 4 with the holding member 1 and the sealing member 2 interposed therebetween. 51 is provided.
[0025]
The holding member 1 has a substantially cylindrical shape, and a required number (for example, three) of groove portions 11 for holding a part of the cable are formed on the outer peripheral surface thereof along the axial direction (front-back direction). And the cross section orthogonal to the axial direction of the groove part 11 has a substantially semicircular contour shape having substantially the same depth as the radius of the cable. A bolt hole 12 penetrates the center of the side surface of the holding member 1 along the axial direction.
[0026]
The sealing member 2 is an annular member provided with a cut portion 22 at one place, and the outer peripheral surface of the holding member 1 can be covered by opening the cut portion 22. A groove 21 for fitting and holding an exposed portion of the cable held in the groove 11 of the holding member 1 along the axial direction is provided on the inner peripheral surface of the sealing member 2 at a position corresponding to the groove 11 described above. The required number is formed. The cross section of the groove 21 also has a substantially semicircular contour formed at a depth substantially equal to the radius of the cable.
[0027]
On the outer peripheral surface of the sealing member 2 covering the holding member 1, a groove pattern 23 is formed in which a plurality of parallel grooves are cut and arranged along the circumferential direction.
[0028]
When the sealing member 2 is wound around the holding member 1 and covered, the outer diameter of the holding member 1 and the sealing member are appropriately distributed so that the outer diameter is slightly smaller than the inner diameter of the conduit to which the water stop device is attached. It has a thickness of 2. The holding member 1 and the sealing member 2 have the same width as each other. In addition, by covering the holding member 1 with the sealing member 2, the groove portions 11 and 21 face each other to form a cable hole for holding the cable.
[0029]
The pressing plate 3 is a substantially disk-shaped metal plate made of, for example, stainless steel, and one end of a bolt 31 is fixed to the center of the pressing plate 3 by welding or the like at right angles to the pressing surface. At the other end of the bolt 31, a screw portion 34 is threaded.
[0030]
A required number of cable locking grooves 32 for locking the cable are formed in the peripheral portion of the pressing plate 3 at positions corresponding to the groove portions 11 of the holding member 1. The cable locking groove 32 is a vertical groove which is opened at the periphery of the pressing plate 3 and is cut off in a substantially straight line with a width slightly larger than the diameter of the cable to a position where the cable is locked in the center direction. The bottom of the cable locking groove 32 for locking the cable is curved so as to surround the cable hole formed by the grooves 11 and 21.
[0031]
The pressing plate 4 is a substantially disk-shaped metal plate made of stainless steel or the like in which the same cable locking groove 42 as the pressing plate 3 is formed, and a bolt hole 41 through which the shaft of the bolt 31 is inserted is provided at the center. Perforated.
[0032]
The fastening means includes a bolt 31 and a nut 51 as a shaft member fixed to the pressing plate 3. The holding member 1 and the sealing member 2 are sandwiched between the pressing plate 3 and the pressing plate 4, and the The holding member 1 and the sealing member 2 are pressed and compressed in the axial direction by screwing and tightening the nut 51 to the screw portion 34 of the bolt 31.
[0033]
Next, a method and an operation of attaching the above-mentioned water stop device to a pipeline will be described. First, the shaft of the bolt 31 is inserted into the bolt hole 12 of the holding member 1, and the pressing plate 3 is brought into contact with the rear surface of the holding member 1, and the shaft of the bolt 31 is inserted into the bolt hole 41 of the pressing plate 4. The pressing plate 4 is brought into contact with the front surface of the device 1. Then, the pressing plates 3 and 4 are appropriately rotated so that the positions of the groove portions 11 of the holding member 1 and the cable locking grooves 32 and 42 of the pressing plates 3 and 4 match. After the positioning of the cable locking grooves 32 and 42, the nut 51 is temporarily screwed to the screw portion 34 of the bolt 31 via the washer 52. Such a temporary assembling of the present water stopping device is performed in advance before the on-site work.
[0034]
Next, at the work site, the cable C is attached to the temporarily assembled water stop device. FIG. 2 is a diagram illustrating a method of attaching the cable C to the water stop device. As shown in the drawing, a cable C is inserted from the outside of the temporarily assembled water stopping device so as to cross the cable locking grooves 32 and 42 of the pressing plates 3 and 4, and the cable is inserted into the groove 11 of the holding member 1. The cable C is temporarily fixed by fitting a part of the cable C. Then, the other part of the cable C is fitted into the groove 21 while opening the cut portion 22 of the sealing member 2, and the holding member 1 is wound and covered with the sealing member 2. Thus, the holding member 1 holds the cable C by the groove 11 and holds the cable C by the groove 21 of the sealing member 2.
[0035]
FIG. 3 is a partial longitudinal sectional view of the present water stop device attached to the pipeline P. As shown in the figure, the present water stop device to which the cable C is attached is inserted from the mouth of the pipe P to a predetermined position. Then, the nuts 51 are screwed together and tightened with a high torque, whereby the pressing plates 3 and 4 are brought into contact with each other to compress the holding member 1 and the sealing member 2 in the axial direction. As a result, the holding member 1 and the sealing member 2 expand in the radial direction, and the outer peripheral surface of the sealing member 2 strongly adheres to the inner peripheral wall of the pipe P. At the same time, a pressing force acts on the cable C on the inner peripheral side of the sealing member 2, and the cable C is closely held between the grooves 11 and 21. In this manner, the present water stop device seals the mouth of the pipe P with the cable C inserted therein, and prevents water or mud from entering from outside.
[0036]
According to the water stopping device according to the first embodiment, the cable C is fitted into the groove 11 formed in the holding member 1, and the sealing member 2 is wound around the outer peripheral surface of the holding member 1 to cover it. The water stop device with the cable C attached thereto is inserted into a predetermined position in the pipe P, and the fastening means is tightened to bring the pressing plates 3 and 4 into contact so that the holding member 1 and the sealing member 2 are moved in the axial direction. Compress. As a result, the holding member 1 and the sealing member 2 are elastically deformed and expand in the radial direction, so that the outer peripheral surface of the sealing member 2 comes into close contact with the inner peripheral wall of the pipe P. At the same time, a pressing force acts on the inner peripheral side of the sealing member 2 to tightly clamp the cable C. In this way, the present water stop device seals the pipe opening of the pipe P with the cable C inserted, and can prevent water or mud from entering the pipe P from the outside.
[0037]
Further, since the cable locking grooves 32 and 42 are formed on the peripheral edges of the pressing plates 3 and 4 corresponding to the groove portions 11 of the holding member 1, the cable C is inserted from the outside of the temporarily assembled pressing plates 3 and 4. Can be mounted in the groove 11 of the holding member 1. Therefore, even when the cable C is laid in the pipeline P, the cable C can be easily attached without cutting the cable C.
[0038]
Further, after attaching the cable C to the water stopping device in which the holding member 1 and the pressing plates 3 and 4 are temporarily assembled in advance and inserting the cable C into the pipeline, the fastening means including the one bolt 31 and the nut 51 is simply tightened. Thus, the water stop device can be installed, and the number of parts handled at the time of installation is small, and workability is improved.
[0039]
In addition, the present waterproofing device can easily remove the sealing member 2 covering the holding member 1 while easily removing the sealing member 2 covering the holding member 1 by loosening the fastening means including the single bolt 31 and the nut 51. The cable C can be easily removed. Therefore, the present waterproofing device is easy to attach / detach even in the pipeline in which the cable C is laid, and can quickly respond to a device replacing operation due to the chase of the cable C or the like.
[0040]
In addition, even when pressure such as water pressure is applied to the water stopping device, the groove pattern 23 portion is minutely formed by bringing the outer peripheral surface of the sealing member 2 having the groove pattern 23 formed therein into close contact with the inner peripheral wall of the pipeline P. Since the water stop device is displaced to absorb and mitigate the pressure, the water stop device is held at a fixed position without slipping in the pipeline P.
[0041]
Next, a second embodiment which is a modification of the first embodiment will be described. FIG. 4 is an exploded perspective view showing the configuration of the water stop device according to the second embodiment. The same components as those in the first embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals.
[0042]
In this figure, the present water stop device includes a holding member 1 made of an elastic material such as rubber, a sealing member 2 made of an elastic material such as rubber and wound around the outer peripheral surface of the holding member 1, a holding member 1 and a sealing member. 2, a pressing plate 3 for pressing the front surface of the holding member 1 and the sealing member 2, and a plurality of bolts 31a for fastening the pressing plates 3, 4 with the holding member 1 and the sealing member 2 interposed therebetween. , 31b, 31c and a plurality of nuts 51a, 51b, 51c.
[0043]
One ends of the bolts 31a, 31b, 31c are fixed to the pressing plate 3 at appropriate intervals. Bolt holes 12a, 12b, and 12c into which the bolts 31a, 31b, and 31c are inserted penetrate the corresponding side of the holding member 1, respectively. Bolt holes 41a, 41b, and 41c into which the bolts 31a, 31b, and 31c are inserted also penetrate the pressing plate 4 at corresponding positions.
[0044]
A method and an operation of attaching the above-described water stop device to the pipeline P will be described. First, the shafts of the bolts 31a, 31b, 31c are inserted into the bolt holes 12a, 12b, 12c of the holding member 1 and the bolt holes 41a, 41b, 41c of the pressing plate 4, and the nut 51a is inserted through the washers 52a, 52b, 52c. , 51b and 51c. The cable C is attached to the water stop device temporarily assembled in this manner, and the holding member 1 is covered with the sealing member 2. After inserting the water stop device with the cable C attached into the pipe P, the nuts 51a, 51b, and 51c are tightened with high torque, and the pressing plates 3, 4 are brought into contact with each other so that the holding member 1 and the sealing member 2 are pivoted. Compress in the direction. As a result, the holding member 1 and the sealing member 2 expand in the radial direction, and the outer peripheral surface of the sealing member 2 strongly adheres to the inner peripheral wall of the pipe P. At the same time, a pressing force acts on the cable C on the inner peripheral side of the sealing member 2, and the cable C is closely held between the grooves 11 and 21. As described above, the present waterproofing device seals the pipe opening of the pipe P with the cable C inserted therein, and prevents water or mud from entering the pipe P from outside.
[0045]
According to the water stopping device according to the second embodiment, the pressing members 3 and 4 are dispersed and fastened by the plurality of bolts 31a, 31b and 31c arranged at appropriate intervals to hold the holding member 1 and the sealing member 2 together. Press. This reduces the amount of deformation such as warpage of the pressing plates 3 and 4 and makes the pressing plates 3 and 4 thinner as compared with fastening with one bolt.
[0046]
Next, a third embodiment which is a further modification of the first embodiment will be described. FIG. 5 is an exploded perspective view showing the configuration of the water stoppage device according to the third embodiment. The same components as those in the first embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals.
[0047]
In this figure, the present water stop device includes a holding member 1 made of an elastic material such as rubber, a sealing member 2 made of an elastic material such as rubber and wound around the outer peripheral surface of the holding member 1, a holding member 1 and a sealing member. 2, a pressing plate 3 for pressing the rear side, a pressing plate 4 for pressing the front side of the holding member 1 and the sealing member 2, and a cable locking plate interposed between the pressing plate 3, the holding member 1 and the sealing member 2. 6, a cable locking plate 7 interposed between the pressing plate 4 and the holding member 1 and the sealing member 2, and a bolt 31 and a nut 51 for fastening the pressing plates 3 and 4 with the holding member 1 and the sealing member 2 interposed therebetween. It is provided with the following fastening means.
[0048]
The cable locking plate 6 is a substantially disk-shaped metal plate made of, for example, stainless steel or the like, and has a bolt hole 61 at the center for inserting the shaft of the bolt 31.
[0049]
On the periphery of the cable locking plate 6, a required number of cable locking grooves 62 having a width slightly larger than the diameter of the cable C for locking the cable C are formed at positions corresponding to the grooves 11 of the holding member 1. I have. The cable locking groove 62 has a vertical groove opened in the peripheral edge of the cable locking plate 6 and cut off in a substantially linear manner toward the center of the cable locking plate 6, and a center of the bolt hole 61 extending from the bottom of the vertical groove. And a transverse groove 63 cut off in an arc shape in a predetermined rotation direction with the axis as an axis.
[0050]
The cable locking plate 7 is a metal plate made of stainless steel or the like having the same bolt holes 71, cable locking grooves 72, and lateral grooves 73 as the cable locking plate 6.
[0051]
The packing 8 is made of an annular sealing material having substantially the same inner diameter as the bolt hole 61, and is adhered on the pressing plate 3 side of the cable locking plate 6 so as to surround the periphery of the bolt hole 61. Alternatively, the packing 8 may be interposed between the cable locking plate 6 and the pressing plate 3, and the packing 8 may be wound around the shaft of the bolt 31 and attached.
[0052]
Next, a method and an operation of attaching the above-described water stop device to the pipeline P will be described. First, the shaft of the bolt 31 is inserted into the bolt hole 61 of the cable locking plate 6 with the packing 8 interposed between the cable locking plate 6 and the pressing plate 3. Then, the shaft of the bolt 31 is inserted into the bolt hole 12 of the holding member 1 to bring the cable locking plate 6 into contact with the rear surface of the holding member 1. Next, the shaft of the bolt 31 is inserted into the bolt hole 71 of the cable locking plate 7, and the cable locking plate 7 is brought into contact with the front surface of the holding member 1. Then, the shaft of the bolt 31 is inserted into the bolt hole 41 of the pressing plate 4, and the pressing plate 4 is brought into contact with the cable locking plate 7. The cable locking plates 6 and 7 are rotatable with respect to the pressing plates 3 and 4 using the bolt 31 as a common axis.
[0053]
Next, the pressing plates 3 and 4 and the cable locking plates 6 and 7 are appropriately rotated, and the groove 11 of the holding member 1, the cable locking grooves 32 and 42 of the pressing plates 3 and 4, and the cable locking plate 6, The positions of the cable locking grooves 62 and 72 of No. 7 are made to coincide with each other. Then, the nut 51 is temporarily screwed to the screw portion 34 of the bolt 31 via the washer 52.
[0054]
The temporary assembling of the present water stopping device is performed in advance, and the cable C is attached to the temporarily assembled water stopping device at the work site. FIG. 6 is a perspective view in which the cable C is attached to the temporarily assembled water stop device.
[0055]
First, the cable C is inserted into the vertical grooves of the cable locking grooves 32 and 42 of the pressing plates 3 and 4 and the cable locking grooves 62 and 72 of the cable locking plates 6 and 7 from outside the temporarily assembled water stopping device. Is inserted, and a part of the cable C is fitted in the groove 11 of the holding member 1.
[0056]
After attaching the required number of cables C, the cable C is locked to the bottom of the cable locking groove 32 of the pressing plate 3 and the cable locking plate 6 is rotated in the direction of the arrow to lock the cable C. The periphery is locked between the vertical groove of the groove 32 and the horizontal groove 63 of the cable locking groove 62. At this time, since the vertical groove of the cable locking groove 32 and the horizontal groove 63 of the cable locking groove 62 intersect at a position where the cable C is locked, these grooves are closed around the cable C.
[0057]
Similarly, the cable locking plate 7 is rotated in a predetermined direction, and the cable C is pinched and locked between the vertical groove of the cable locking groove 42 of the pressing plate 4 and the horizontal groove 73 of the cable locking groove 72. The cable locking groove 42 and the cable locking groove 72 are closed around the cable C.
[0058]
Next, the sealing member 2 is wrapped around the holding member 1 to cover it, and the water stop device is inserted into the pipeline P. Then, by tightening the nut 51 with a high torque, the holding member 1 and the sealing member 2 are axially compressed via the pressing plates 3 and 4 and the cable locking plates 6 and 7. At this time, around the cable C, the cable locking grooves 32, 42 formed in the pressing plates 3, 4 and the cable locking grooves 62, 72 formed in the cable locking plates 6, 7 are closed. Therefore, a part of the holding member 1 or the sealing member 2 does not protrude into these cable locking grooves 32, 42, 62, 72.
[0059]
Further, the packing 8 seals the gap between the cable locking plate 6 and the pressing plate 3 and the bolt hole 12 of the holding member 1, and prevents movement of water or mud between them.
[0060]
According to the water stopping device according to the third embodiment, the cable locking grooves 32 and 42 are formed on the periphery of the pressing plates 3 and 4 corresponding to the groove 11 of the holding member 1, and the cable locking plate 6 is formed. Since the cable locking grooves 62 and 72 are formed in the peripheral edges of the holding members 1, the cable C is inserted from the outside of the temporarily assembled pressing plates 3 and 4 and the cable locking plates 6 and 7 and attached to the holding member 1. Thus, even when the cable C is laid in the pipeline P, the cable C can be easily attached without cutting the cable C.
[0061]
Further, by rotating the cable locking plates 6 and 7 in a predetermined direction, the cable C can be connected to the cable locking grooves 32 and 42 of the pressing plates 3 and 4 and the cable locking grooves 62 of the cable locking plates 6 and 7. 72. At the same time, since the cable locking grooves 32, 42 and the cable locking grooves 62, 72 are closed around the cable C, when the holding member 1 and the sealing member 2 are compressed in the axial direction, the holding member 1 Alternatively, a part of the sealing member 2 is prevented from protruding into the cable locking grooves 32 and 42 of the pressing plates 3 and 4 or the cable locking grooves 62 and 72 of the cable locking plates 6 and 7. Therefore, it is possible to prevent the sealing performance from being impaired due to a crack or the like caused by the holding member 1 or the sealing member 2 protruding.
[0062]
Also, since the holding member 1 or the sealing member 2 is prevented from protruding, it is possible to uniformly press almost the entire surface on both sides of the holding member 1 and the sealing member 2 via the pressing plates 3 and 4. Thereby, the outer peripheral surface of the sealing member 2 is evenly adhered to the inner peripheral wall of the pipe P, and the sealing performance is improved.
[0063]
Next, a fourth embodiment which is a modification of the third embodiment will be described. FIG. 7 is an exploded perspective view showing the configuration of the water stop device according to the third embodiment. Note that the same components as those of the third embodiment shown in FIGS. 5 and 6 are denoted by the same reference numerals.
[0064]
In this figure, the present water stop device includes a holding member 1 made of an elastic material such as rubber, a sealing member 2 made of an elastic material such as rubber and wound around the outer peripheral surface of the holding member 1, a holding member 1 and a sealing member. 2, a pressing plate 3 for pressing the rear side, a pressing plate 4 for pressing the front side of the holding member 1 and the sealing member 2, and a cable locking plate interposed between the pressing plate 3, the holding member 1 and the sealing member 2. 6, a cable locking plate 7 interposed between the pressing plate 4 and the holding member 1 and the sealing member 2, and a bolt 31 and a nut 51 for fastening the pressing plates 3 and 4 with the holding member 1 and the sealing member 2 interposed therebetween. It is provided with the following fastening means.
[0065]
A required number of cable locking grooves 62 and 72 for locking the cable C are formed in the peripheral portions of the cable locking plates 6 and 7 at positions corresponding to the grooves 11 of the holding member 1. The cable locking grooves 62 and 72 are opened at the peripheral edges of the cable locking plates 6 and 7 and cut off in a substantially straight line to a position where the cable C in the center direction is locked with a width slightly larger than the diameter of the cable C. It is a cut vertical groove, and the bottom is curved so as to surround the cable C.
[0066]
A required number of cable locking grooves 32 and 42 for locking the cable C are formed on the peripheral edges of the pressing plates 3 and 4 at positions corresponding to the grooves 11 of the holding member 1 with a width slightly larger than the diameter of the cable C. ing. These cable locking grooves 32 and 42 are formed in the peripheral edges of the pressing plates 3 and 4, and are cut in a substantially straight line toward the center of the pressing plates 3 and 4. Are formed in the form of lateral grooves 33 and 43 which are cut off in an arc shape toward a predetermined rotation direction about the center of the shaft.
[0067]
Next, a method and an operation of attaching the above-described water stop device to the pipeline P will be described. First, the shaft of the bolt 31 is inserted into the bolt hole 61 of the cable locking plate 6 with the packing 8 interposed between the cable locking plate 6 and the pressing plate 3. Then, the shaft of the bolt 31 is inserted into the bolt hole 12 of the holding member 1 to bring the cable locking plate 6 into contact with the rear surface of the holding member 1. Next, the shaft of the bolt 31 is inserted into the bolt hole 71 of the cable locking plate 7, and the cable locking plate 7 is brought into contact with the front surface of the holding member 1. Then, the shaft of the bolt 31 is inserted into the bolt hole 41 of the pressing plate 4, and the pressing plate 4 is brought into contact with the cable locking plate 7.
[0068]
Next, the pressing plates 3 and 4 and the cable locking plates 6 and 7 are appropriately rotated, and the groove 11 of the holding member 1, the cable locking grooves 32 and 42 of the pressing plates 3 and 4, and the cable locking plate 6, The positions of the cable locking grooves 62 and 72 of No. 7 are made to coincide with each other. Then, the nut 51 is temporarily screwed to the screw portion 34 of the bolt 31 via the washer 52.
[0069]
The temporary assembling of the water stopping device is performed in advance, and the cable locking grooves 32 and 42 of the pressing plates 3 and 4 and the cable locking plates 6 and 7 are formed from outside the temporarily assembled water stopping device. The cable C is inserted into each of the vertical grooves of the cable locking grooves 62 and 72, and a part of the cable C is fitted into the groove 11 of the holding member 1.
[0070]
After attaching the required number of cables C, the pressing plates 3 and 4 are rotated in a predetermined rotation direction while the cables C are locked in the bottoms of the cable locking grooves 62 and 72 of the cable locking plates 6 and 7. Then, the cable C is sandwiched between the vertical grooves of the cable locking grooves 62 and 72 and the horizontal grooves 33 and 43 of the cable locking grooves 32 and 42 to lock the periphery. At this time, since the vertical grooves of the cable locking grooves 62 and 72 and the horizontal grooves 33 and 43 of the cable locking grooves 32 and 42 intersect at a position where the cable C is locked, these grooves are closed around the cable C. It comes off.
[0071]
Next, the sealing member 2 is wrapped around the holding member 1 to cover it, and the water stop device is inserted into the pipeline P. Then, by tightening the nut 51 with a high torque, the holding member 1 and the sealing member 2 are axially compressed via the pressing plates 3 and 4 and the cable locking plates 6 and 7. At this time, around the cable C, the cable locking grooves 32 and 42 formed in the pressing plate and the cable locking grooves 62 and 72 formed in the cable locking plates 6 and 7 are closed. A part of the holding member 1 or the sealing member 2 does not protrude into these cable locking grooves 32, 42, 62, 72.
[0072]
According to the water stopping device according to the fourth embodiment, the cable locking grooves 32 and 42 are formed on the peripheral edges of the pressing plates 3 and 4 corresponding to the grooves 11 of the holding member 1, and the cable locking plates 6 are formed. Since the cable locking grooves 62 and 72 are formed on the peripheral edges of the cable fixing plates 6 and 7, the cable C is inserted from the outside of the temporarily assembled pressing plates 3 and 4 and the cable locking plates 6 and 7 and is attached to the groove 11. Thus, even when the cable C is laid in the pipeline P, the cable C can be easily attached without cutting the cable C.
[0073]
By rotating the pressing plates 3 and 4 in a predetermined direction, the cable C is moved into the cable locking grooves 32 and 42 of the pressing plates 3 and 4 and the cable locking grooves 62 and 72 of the cable locking plates 6 and 7. Can be pinched and locked. At the same time, since the cable locking grooves 32, 42 and the cable locking grooves 62, 72 are closed around the cable C, when the holding member 1 and the sealing member 2 are compressed in the axial direction, the holding member 1 Alternatively, a part of the sealing member 2 is prevented from protruding into the cable locking grooves 32 and 42 of the pressing plates 3 and 4 or the cable locking grooves 62 and 72 of the cable locking plates 6 and 7. Therefore, it is possible to prevent the sealing performance from being impaired due to a crack or the like caused by the holding member 1 or the sealing member 2 protruding.
[0074]
Also, since the holding member 1 or the sealing member 2 is prevented from protruding, it is possible to uniformly press almost the entire surface on both sides of the holding member 1 and the sealing member 2 via the pressing plates 3 and 4. Thereby, the outer peripheral surface of the sealing member 2 is evenly adhered to the inner peripheral wall of the pipe P, and the sealing performance is improved.
[0075]
In the above-described embodiment, the water stopping device for the pipeline in which three cables are laid has been described. However, the present invention is not limited to the number of cables, and may be adapted to the number of cables to be laid. An appropriate number of grooves 11, 21 and cable locking grooves 32, 42, 62, 72 may be formed.
[0076]
【The invention's effect】
According to the pipeline water stop device of the first aspect, the cable is fitted into the groove formed in the holding member, and the sealing member is wound around the outer peripheral surface of the holding member to cover the sealing member. The watertight device with the cable attached thereto is inserted into a predetermined position in the conduit, and the fastening means is tightened to bring the pair of pressing plates into contact to compress the sealing member in the axial direction. As a result, the sealing member is elastically deformed and expands in the radial direction, so that the outer peripheral surface of the sealing member strongly adheres to the inner peripheral wall of the conduit and, at the same time, tightly clamps the cable on the inner peripheral side of the sealing member. In this way, the present pipeline water stop device can seal the pipeline while the cable is inserted, and can prevent intrusion of water or mud.
[0077]
Further, since the cable locking groove is formed on the periphery of the pressing plate corresponding to the groove, the cable can be inserted from the outside of the pressing plate and temporarily fixed to the groove. Thereby, even if the cable is laid in the pipeline, the cable can be easily attached without cutting the cable. Therefore, workability such as cable hunting is improved.
[0078]
According to the pipe water stop device of the second aspect, after inserting the water stop device into the predetermined position of the pipe, the fastening means consisting of one shaft member and the nut member is simply screwed and tightened. Therefore, since the main water stop device can be installed, the number of parts handled at the time of installation is small, and workability is improved.
[0079]
Further, since the cable can be easily removed from the main water stop device by loosening the fastening means composed of one shaft member and the nut member and removing the sealing member, the attaching / detaching operation of the main water stop device can be performed. It will be easier.
[0080]
According to the pipeline water stop device of the third aspect, the plurality of shaft members fixed to one of the pressing plates are dispersed at appropriate intervals to fasten the respective pressing plates and press the sealing member. In addition, the amount of deformation such as warpage of each pressing plate is reduced, and the thickness of each pressing plate can be further reduced.
[0081]
According to the pipeline water stopping device of the fourth aspect, the first cable engaging groove corresponding to the groove of the holding member is provided on the periphery of the pressing plate, and the second cable engaging groove corresponding to the groove is provided on the periphery of the cable engaging plate. Since the stop groove is formed, the cable can be inserted into these vertical grooves from the outside of the pressing plate and the cable locking plate and attached to the groove of the holding member, and even in a state where the cable is laid in the pipeline. Cables can be easily attached.
[0082]
Further, when the cable locking plate is rotated in a state where the cable is locked at the bottom of the first cable locking groove of the pressing plate, the vertical groove of the first cable locking groove and the second cable lock of the cable locking plate are rotated. The cable is interposed and locked with the lateral groove of the stop groove. Since the vertical groove of the first cable locking groove and the horizontal groove of the second cable locking groove intersect at the position where the cable is locked, these grooves are closed around the cable. Thereby, when the sealing member is compressed, it is possible to prevent a part of the sealing member from protruding into the first cable locking groove of the pressing plate or the second cable locking groove of the cable locking plate.
[0083]
Therefore, it is possible to prevent the sealing performance from being impaired due to cracks or the like caused by the protrusion of the sealing member.
[0084]
In addition, since the protrusion of the sealing member is prevented, it is possible to evenly press almost the entire surface on both sides of the sealing member via the pressing plate and the cable locking plate. Thereby, the outer peripheral surface of the sealing member is evenly brought into close contact with the inner peripheral wall of the conduit, and the sealing performance is improved.
[0085]
According to the pipe water stopping device of the fifth aspect, when the pressing plate is rotated while the cable is locked at the bottom of the first cable locking groove of the cable locking plate, the first cable locking groove is formed. The cable is interposed and locked between the vertical groove and the horizontal groove of the second cable locking groove of the pressing plate. Since the vertical groove of the first cable locking groove and the horizontal groove of the second cable locking groove intersect at the position where the cable is locked, these grooves are closed around the cable. This prevents a part of the sealing member from protruding into the first cable locking groove of the cable locking plate or the second cable locking groove of the pressing plate when the sealing member is compressed.
[0086]
Therefore, it is possible to prevent the sealing performance from being impaired due to cracks or the like caused by the protrusion of the sealing member.
[0087]
In addition, since the protrusion of the sealing member is prevented, it is possible to evenly press almost the entire surface on both sides of the sealing member via the pressing plate and the cable locking plate. Thereby, the outer peripheral surface of the sealing member is evenly brought into close contact with the inner peripheral wall of the conduit, and the sealing performance is improved.
[0088]
According to the pipeline water stop device of the sixth aspect, by bringing the outer peripheral surface of the sealing member having the groove pattern into close contact with the inner circumferential wall of the pipeline, pressure such as water pressure is applied to the water stop device. Even if it acts, the groove pattern portion is slightly displaced to absorb and alleviate the pressure, so that the present pipeline water stop device can be held at a fixed position in the pipeline.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a configuration of a water stop device according to a first embodiment.
FIG. 2 is a perspective view showing a method of attaching a cable C to the water stopping device according to the first embodiment.
FIG. 3 is a partial cross-sectional view of the water stop device according to the first embodiment attached to a pipe.
FIG. 4 is an exploded perspective view showing a configuration of a water stop device according to a second embodiment.
FIG. 5 is an exploded perspective view illustrating a configuration of a water stop device according to a third embodiment.
FIG. 6 is a perspective view in which a cable C is attached to a water stop device according to a third embodiment.
FIG. 7 is an exploded perspective view illustrating a configuration of a water stop device according to a fourth embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Holding member, 11 ... Groove part, 12 ... Bolt hole
2 ... sealing member, 12 ... groove, 22 ... cutting part
23… Groove pattern
3 ... Pressing plate, 31 ... Bolt (shaft member)
32: cable locking groove, 33: lateral groove, 34: screw part
4 ... Press plate, 41 ... Bolt hole,
42: cable locking groove, 43: lateral groove
51: nut (nut member), 52: washer
6 ... Cable locking plate, 61 ... Bolt hole
62: cable locking groove, 63: lateral groove
7 ... Cable locking plate, 71 ... Bolt hole
72: cable locking groove 73: lateral groove
8… Packing
C: Cable, P: Pipe line

Claims

A pipeline water stopping device for sealing a pipeline in which a cable is laid,
A holding member having a substantially cylindrical outer circumferential surface formed with a groove for holding the cable along an axial direction, an elastically deformable sealing member for covering the outer circumferential surface of the holding member and holding the cable; A pair of pressing plates arranged on both sides of the member and the sealing member in the axial direction, and fastening means for fastening the respective pressing plates and compressively deforming the sealing member,
A pipe water stopping device, wherein a cable locking groove corresponding to the groove is formed on a peripheral edge of each of the pressing plates.

The fastening means includes one shaft member having one end fixed to the center of one of the pressing plates and the other end passing through the center of the holding member and the other of the pressing plates, and the shaft member on the other pressing plate side. The pipeline water stopping device according to claim 1, further comprising a nut member screwed to the other end of the member.

The fastening means includes a plurality of shaft members, one end of which is fixed to one of the pressing plates at an appropriate distance from each other and the other end of which passes through the holding member and the other of the pressing plates, and the other pressing plate side. The pipeline water stopping device according to claim 1, further comprising a nut member screwed to the other end of each of the shaft members.

A pipeline water stopping device for sealing a pipeline in which a cable is laid,
A holding member having a substantially cylindrical outer circumferential surface formed with a groove for holding the cable along an axial direction, an elastically deformable sealing member for covering the outer circumferential surface of the holding member and holding the cable; A pair of pressing plates arranged on both sides of the member and the sealing member in the axial direction, a fastening unit for fastening the respective pressing plates and compressively deforming the sealing member, and between the pressing plates and the sealing member; A cable locking plate disposed coaxially with the pressing plate and rotatably provided with respect to the pressing plate,
A first cable locking groove corresponding to the groove is formed on a peripheral edge of each pressing plate, and a second cable locking groove corresponding to the groove is formed on the peripheral edge of each cable locking plate. The first cable locking groove includes a vertical groove formed toward the center of the pressing plate, and the second cable locking groove includes a vertical groove formed toward the center of the cable locking plate. It consists of a horizontal groove formed from the bottom of the vertical groove toward the turning direction,
The cable locking plate is rotated while the cable is locked at the bottom of the first cable locking groove, and the periphery of the cable is defined by the vertical groove of the pressing plate and the horizontal groove of the cable locking plate. A pipe water stopping device characterized by being locked.

A pipeline water stopping device for sealing a pipeline in which a cable is laid,
A holding member having a substantially cylindrical outer circumferential surface formed with a groove for holding the cable along an axial direction, an elastically deformable sealing member for covering the outer circumferential surface of the holding member and holding the cable; A pair of pressing plates arranged on both sides of the member and the sealing member in the axial direction, a fastening unit for fastening the respective pressing plates and compressively deforming the sealing member, and between the pressing plates and the sealing member; A cable locking plate disposed coaxially with the pressing plate and rotatably provided with respect to the pressing plate,
Each of the cable locking plates has a first cable locking groove formed on the periphery thereof corresponding to the groove, and each of the pressing plates has a second cable locking groove formed on the periphery thereof corresponding to the groove. The first cable locking groove includes a vertical groove formed toward the center of the cable locking plate, and the second cable locking groove includes a vertical groove formed toward the center of the pressing plate. It consists of a horizontal groove formed from the bottom of the vertical groove toward the turning direction,
The pressing plate is rotated while the cable is locked at the bottom of the first cable locking groove, and the periphery of the cable is locked by the vertical groove of the cable locking plate and the horizontal groove of the pressing plate. A pipeline water stopping device, characterized in that:

The pipeline water stopping device according to any one of claims 1 to 5, wherein a groove pattern is formed on an outer peripheral surface of the sealing member.