JP4336445B2

JP4336445B2 - Cable pulling device

Info

Publication number: JP4336445B2
Application number: JP2000181437A
Authority: JP
Inventors: 秀顕田村
Original assignee: Aichi Corp
Current assignee: Aichi Corp
Priority date: 2000-06-16
Filing date: 2000-06-16
Publication date: 2009-09-30
Anticipated expiration: 2020-06-16
Also published as: JP2002010423A

Description

【０００１】
【発明の属する技術分野】
本発明は、ケーブル牽引装置に関し、更に詳細には、地下に布設されたケーブルをキャプスタンウィンチに捲回し、キャプスタンウィンチから引き出されるケーブルを牽引して、布設されたケーブルを撤去するケーブル牽引装置に関する。
【０００２】
【従来の技術】
電力ケーブルや通信ケーブル等の電線（ケーブル）の布設・撤去作業においては、例えば、ケーブル作業車が使用されている。ケーブル作業車には車体にケーブル牽引装置が搭載されているものがある。このケーブル牽引装置は、車体後部に配設されたキャプスタンウィンチと、キャプスタンウィンチよりも車両前方側に配設されたケーブル繰出装置とを有して構成されている。キャプスタンウィンチは車体後部に揺動自在に設けられたスイングアームを有し、このスイングアームには回転駆動可能に設けられたキャプスタンウィンチが取り付けられている。キャプスタンウィンチはスイングアームに回転自在に設けられた大径のキャプスタンと、このキャプスタンを回転駆動させる駆動モータとを有して構成されている。キャプスタンよりも車両の前方側にはキャプスタンから引き出されたケーブルを車両の前方側へ繰り出して布設されたケーブルを牽引するための繰出装置が設けられている。
【０００３】
繰出装置は牽引されるケーブルの幅方向に配置されケーブルを挟んだ状態で回転駆動してケーブルを繰り出す一対の牽引ローラを有している。牽引ローラは円柱状であり、ゴム製で内部に空気が注入されて外力が作用すると弾性変形可能な空気注入式のボール状回転体である。この牽引ローラによりキャプスタンウィンチから引き出されたケーブルを繰り出す場合、牽引ローラは弾性変形が可能であるので、ケーブルとの接触面積を大きくしてケーブルの繰り出し力を増加させることができ、また、作業騒音を小さくすることができる。
【０００４】
また、一対の牽引ローラにより３本のケーブルを撚り合わせたいわゆるトリプレックスケーブルを牽引させる場合、牽引の途中でケーブル全体の径が変化しても、牽引ローラの弾性変形によりケーブル全体の径変化を吸収することができるので、一対の牽引ローラの中心間距離を調整するための調整機構が不要であり、繰出装置の構造を簡単にすることができる。
【０００５】
【発明が解決しようとする課題】
ここで、布設されたケーブルの撤去工事において、撤去されたケーブルが廃棄される場合と再使用される場合の２通りがあり、ケーブルが廃棄される場合にはケーブル表面に傷を付けてもよいが、再使用される場合にはケーブル表面に傷を付けることができない。
【０００６】
しかしながら、空気注入式の牽引ローラではケーブルの表面状態により牽引されるケーブルと牽引ローラ間の摩擦が小さくなってケーブルが牽引ローラ間で滑る場合がある。特に、地下ケーブル工事の布設作業においては、布設時の管路抵抗を小さくするために滑剤と呼ばれる潤滑剤をケーブルの表面に塗りながら布設する場合があり、この場合にはケーブルと牽引ローラ間の摩擦係数は大幅に小さくなる。また、長年管路に入っていたケーブルの表面には泥や水が付着しており摩擦係数の低下は避けることができない状況にある。このため、地下ケーブル工事の撤去作業においては、ケーブルが牽引ローラ間で滑りが生じてケーブルを牽引することができず、撤去作業がしばしば中断する、という問題が発生する。そこで、牽引ローラの表面に凹凸を設けてケーブル表面に食い込ませる歯付きローラが提案されたが、この歯付きローラを再使用されるケーブルに使用すると、ケーブル表面が傷つきケーブルの再使用が不可能になる。
【０００７】
本発明はこのような問題に鑑みてなされたものであり、ケーブル表面が滑り易い状態であってもケーブルを牽引することができ、且つ再使用ケーブルでは表面を傷つけずに牽引できるケーブル牽引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】
前記課題を解決するために本発明のケーブル牽引装置は、上下方向に所定の間隙を有して対向配置された上板及び底板と、上板及び底板の各周縁間に接続され内部に空気が注入されて径方向外側へ膨張し弾性変形可能なチューブ状胴部とを有する一対の牽引ローラを備えたケーブル牽引装置において、一対の牽引ローラの各表面に着脱自在に装着可能な滑り防止手段を有し、滑り防止手段は、牽引ローラの上部であって上板の径方向外側に配設された環状の上部固定部材と、牽引ローラの下部であって底板の径方向外側に着脱自在に配設された環状の下部固定部材と、上部固定部材及び下部固定部材の各周縁間に接続されチューブ状胴部の外周面を覆う滑り防止部材と、滑り防止部材の牽引ローラに対する回転を防止するため上板上に着脱自在に装着されて上部固定部材と接続された回転防止部材と、滑り防止部材の張力を調整するため上部固定部材に接続され回転防止部材に対して上部固定部材を上下方向へ移動させる張力調整手段とを有してなる。
【０００９】
上記構成のケーブル牽引装置によれば、一対の牽引ローラの各表面に滑り防止手段を装着し一対の牽引ローラ間にケーブルを挟装させた状態で牽引ローラを回転させると、滑り防止手段がケーブルと一対の牽引ローラ間の滑りを防止して、牽引ローラがケーブルを牽引する。また、牽引ローラは内部に空気が注入されて径方向外側へ膨張し弾性変形可能なチューブ状胴部を有して構成されているので、一対の牽引ローラ間に挟装されたケーブルの径が変化しても牽引ローラが弾性変形してケーブル径の変化を吸収する。
【００１０】
このように牽引ローラの表面に滑り防止手段を装着することで、ケーブルの表面が滑り易い状態であってもケーブルと牽引ローラ間の滑りを防止することができ、布設されたケーブルを容易に撤去することができる。また、作業現場においてケーブルの表面状態に応じて滑り防止手段を牽引ローラに着脱することで、ケーブルの撤去作業を効率的に行なうことができる。更に、滑り防止手段が牽引ローラに着脱自在であるので、布設されたケーブルの表面を傷つけずに再使用するケーブルや傷つけてもよい廃棄ケーブルの両ケーブルの撤去作業を行なうことができ、廃棄ケーブル用の牽引ローラと再使用ケーブル用の牽引ローラの２種類のローラを準備する必要がなくなり経済的である。
【００１１】
また、上部固定部材と下部固定部材の各周縁間に配設されたチューブ状胴部の外周面に滑り防止部材を覆い、張力調整手段により滑り防止部材の張力を調整し、回転防止部材により滑り防止部材の牽引ローラに対する回転を防止することで、牽引ローラのチューブ状胴部の外周面に滑り防止部材を確実に密着させることができ、ケーブルの表面が滑り易い状態であっても、ケーブルと牽引ローラ間の滑りを防止して、ケーブルを確実に牽引することができる。更に、牽引ローラは弾性変形可能なチューブ状胴部を有することで、一対の牽引ローラの中心間距離を調整する機構が不要であり、牽引ローラの構造を簡単にすることができる。
【００１２】
また、上記構成のケーブル牽引装置において、滑り防止部材は上部固定部材と下部固定部材間の周方向に所定の間隙を有して接続された複数のワイヤロープ（例えば、実施形態におけるワイヤ５５）を有し、ワイヤロープは複数の素線を撚ってなり、複数のワイヤロープは所定の角度で傾斜して隣接する他のワイヤロープと交差するとともに素線の撚り目がケーブルの進行方向に対して略垂直に当たるように配設されていることが好ましい。
【００１３】
上記構成のケーブル牽引装置によれば、一対の牽引ローラ間にケーブルを挟装させると素線の撚り目がケーブルの進行方向に対して略垂直に当たる。また、ワイヤロープは他のワイヤロープと交差している。このため、素線の撚り目からケーブルに伝達される力をケーブルに確実に伝達させることができるとともに、ワイヤロープのケーブルへの接触面積を大きくすることができ、ケーブルと牽引ローラ間の滑りを確実に防止して一対の牽引ローラ間に挟装されたケーブルを確実に牽引することができる。
【００１４】
また、上記構成のケーブル牽引装置において、下部固定部材は少なくとも２つの固定部材を有し、一方の固定部材の一端が隣接する他方の固定部材の一端とヒンジ（例えば、実施形態における連結部材８１）を介して連結され、一方の固定部材の他端が隣接する他方の固定部材の他端と連結部材を介して連結され、上板の上面に互いに所定の間隙を有して配設された複数の係止穴を有し、回転防止部材は、上板上に載置される回転防止本体部と、回転防止本体部の下面に突設して係止穴に係止される下面係止突部（例えば、実施形態における下面係止突起６９）と、回転防止本体部の側面に突設された側面係止突部（例えば、実施形態における側面係止突起７１）と、上部固定部材の上面に突設された支持部材（例えば、実施形態における支持部材６３）と、支持部材に設けられ側面係止突部と係合して上部固定部材の回転を防止するとともに上部固定部材の上下方向の移動を許容する係合凹部（例えば、実施形態における挿通孔６５）とを有して構成され、張力調整手段は、上部固定部材の上面に突設されて回転防止本体部の上方に延出した支持部材と、回転防止本体部の上方の支持部材に螺合して上下方向に移動可能であり下端部が回転防止本体部の上面に当接して支持部材を介して上部固定部材を上下方向に移動させるねじ本体部（例えば、実施形態におけるねじ本体部７５）とを有してなり、ねじ本体部を上下方向に移動させることで、上部固定部材を介して滑り防止部材の張力が調整されるように構成してもよい。
【００１５】
上記構成のケーブル牽引装置によれば、牽引ローラに滑り防止手段を装着するには、下部固定部材の連結部材を解除しヒンジを中心として隣接する固定部材を拡開させる。そして、上部固定部材を上板に載置し、拡開された下部固定部材を底板の径方向外側に掛け回した後に拡開された固定部材を締め上げ連結部材を介して接続させて下部固定部材を牽引ローラの下部に装着させる。回転防止本体部の下面係止突部を係止穴に係止させ、側面係止突部を係合凹部に係合させる。そして、ねじ本体部を回転させて上部固定部材を上下方向に移動させて滑り防止部材の張力を調整する（張力を増加させる）。また、牽引ローラに装着された滑り防止手段を取り外すには、ねじ本体部を回転させて滑り防止部材の張力を低下させる。そして、下部固定部材の連結部材を解除して固定部材を拡開して下部固定部材を牽引ローラから取り外した後に、上部固定部材を上方へ持ち上げて滑り防止手段を牽引ローラから分離させる。
【００１６】
このように、下部固定部材は少なくとも２つの固定部材を有し、ヒンジを介して拡開自在とし連結部材を介して連結可能とすることで、滑り防止部材を牽引ローラに容易に着脱させることができる。また、下面係止突部を係止穴に係止させ側面係止突部を突出部材と係合させることで、回転防止本体部が上板に固定されて滑り防止部材の牽引ローラに対する回転を防止することができる。更に、上部固定部材に突設された支持部材に上下方向に移動可能なねじ本体部を設け、ねじ本体部を移動させることで、牽引ローラに対して上部固定部材を上下方向に移動させることができ、滑り防止部材の張力調整を容易に行なうことができる。
【００１７】
【発明の実施の形態】
以下、本発明の実施の形態を図１から図８に基づいて説明する。本実施の形態は電線、通信ケーブル等を布設・撤去するケーブル作業車の態様を示す。最初に本発明のケーブル牽引装置を説明する前にケーブル牽引装置を搭載したケーブル作業車を図１及び図２を使用して説明する。図１はケーブル作業車の正面図を示し、図２はケーブル作業車の平面図を示す。図１に示すように、ケーブル作業車１は車体３の前部に運転キャビン５を有し、車体後部には下方へ突出する縁切りウィンチ６が取り付けられている。
【００１８】
次に、ケーブル牽引装置１０を説明する。ケーブル牽引装置１０は運転キャビン５よりも車両後方の車体３上に設けられ、キャプスタンウィンチ１１と繰出装置２０とを有して構成されている。キャプスタンウィンチ１１は車体後部の左右両端部に上下方向に揺動可能に軸支されたスイングアーム１３と、このスイングアーム１３間に回転自在に設けられたキャプスタン１５と、このキャプスタン１５を回転させるための油圧モータ１７とを有して構成されている。スイングアーム１３の下部と車体３の中央部との間には揺動シリンダ１９が枢結されており、この揺動シリンダ１９の伸縮動によりスイングアーム１３が上下方向に揺動してキャプスタン１５の位置を車両の前後及び上下方向に調整することができるように構成されている。
【００１９】
キャプスタン１５は、図２に示すように、その胴部１５ａの外径がキャプスタン１５の中央部から車両右側（図２において紙面左側）へ進むにしたがって拡開するように構成され、胴部１５ａにはケーブルＣが捲回されている。胴部１５ａから運転キャビン５側へ引き出されたケーブルＣを運転キャビン５側へ引っ張るとともに、胴部１５ａから車両後方下側へ延出するケーブルＣに車両後方下側へ作用する張力が作用すると、胴部１５ａに捲回されたケーブルＣ間に摩擦が生じるとともにケーブルＣと胴部１７ａに間にも摩擦が生じて、ケーブルＣが胴部１５ａの中央部で密接し、ケーブルＣを胴部１５ａ上で摺動させない力（以下、この力を「尻手力」と記す。）が発生する。このため、車両後方下側へ延出するケーブルＣに車両後方下側へ作用する張力が作用していても尻手力が大きければ、胴部１７ａに捲回されたケーブルＣが胴部１７ａ上で滑ることはない。
【００２０】
キャプスタンウィンチ１１と運転キャビン５間には、キャプスタン１５から引き出されたケーブルＣを牽引して運転キャビン５の前方へ繰り出す繰出装置２０が設けられている。繰出装置２０は図示しない油圧モータ等の駆動源を内蔵したパワーユニット２１の上部に取り付けられている。繰出装置２０は、基台２３と、基台２３上部の前後に設けられた一対のガイドローラ２５と、一対のガイドローラ２５間であってケーブルＣの幅方向に配設されてケーブルＣを挟んだ状態で回転駆動してキャプスタンウインチ１１から引き出されたケーブルＣを牽引する一対の牽引ローラ２７とを有して構成されている。
【００２１】
牽引ローラ２７は、図３に示すように、正面視楕円形状であり、上下方向に所定の間隙を有して対向配置された円板状の上板２９及び底板３１と、上板２９及び底板３１の各周縁間に接続され内部に空気が注入されて径方向外側へ膨張して弾性変形可能なチューブ状胴部３３とを有して構成されている。上板２９には所定の間隙を有して配置された一対の係止穴３５が設けられている。底板３１には基台２３から上方へ突出し回転駆動可能な駆動軸３７が接続されており、駆動軸３７が回転すると底板３１を介して牽引ローラ２７が回転するように構成されている。
【００２２】
牽引ローラ２７のチューブ状胴部３３の外側にはケーブルＣと一対の牽引ローラ２７間の滑りを防止するための滑り防止装置４０が着脱自在に装着されている。滑り防止装置４０は、図３及び図４にも示すように、牽引ローラ２７の上部であって上板２９の径方向外側に載置された環状の上部固定部材４１と、牽引ローラ２７の下部であって底板３１の径方向外側に着脱自在に装着された環状の下部固定部材４３と、上部固定部材４１及び下部固定部材４３の各周縁間に接続されチューブ状胴部３３の外周面を覆う滑り防止部材４５と、滑り防止部材４５の牽引ローラ２７に対する回転を防止するため上板２９上に着脱自在に装着された回転防止部材４７と、滑り防止部材４５の張力を調整するため上部固定部材４１に接続されて回転防止部材４７に対して上部固定部材４１を上下方向へ移動させる張力調整手段４９とを有して構成されている。
【００２３】
更に詳細には、図４に示す上部固定部材４１の中央部には貫通孔５１が設けられており、この貫通孔５１の内径は上板２９の外径よりも大径であり、上板２９の径方向外側に貫通孔５１が係合する。上部固定部材４１の周縁部には、所定の間隙を有して配置された複数のねじ孔５３とワイヤ５５を挿通させる複数のワイヤ挿通孔５７とが設けられている。図３に示す上部固定部材４１の上部周縁には環状のワイヤ固定板５９が載置され、このワイヤ固定板５９を貫通する複数のボルト６１が上部固定部材４１に設けられたねじ孔５３に螺合してワイヤ固定板５９と上部固定部材４１間にワイヤ５５を挟み込まんで固定している。上部固定部材４１の上面の中央部には貫通孔５１を跨る逆Ｕ字状の支持部材６３が固着されており、支持部材６３の両側壁の中間部には上下方向に延びた挿通孔６５が設けられている。上板２９の上部には直方体形状をした回転防止本体部６７が載置されている。回転防止本体部６７の底面には下方へ突出し所定の間隙を有して配置された一対の下面係止突起６９が設けられ、回転防止本体部６７の上面の左右両端部には左右方向へ突出する一対の側面係止突起７１が設けられている。一対の下面係止突起６９は一対の係止穴３５に係止され、また、一対の側面係止突起７１は挿通孔６５に挿通するように配設されている。
【００２４】
支持部材６３の中央部には図示しない挿通孔が設けられており、この挿通孔の下部における支持部材６３の底面には内側に雌ねじを螺刻したナット７３が取り付けられている。ナット７３の雌ねじには、下端に板状の当接部７５ａを有し先端部に円板状の摘み７５ｂを有したねじ本体部７５が螺合している。
【００２５】
即ち、回転防止部材４７は、回転防止本体部６７と下面係止突起６９と側面係止突起７１と支持部材６３に設けられた挿通孔６５とを有して構成されている。また、張力調整手段４９は、支持部材６３とねじ本体部７５とを有して構成されている。
【００２６】
滑り防止部材４５は、図３に示すように、上部固定部材４１と下部固定部材４３間の周方向に所定の間隙を有して張設されたワイヤ５５を有して構成されている。ワイヤ５５は複数の素線を撚ったものであり、ワイヤ５５は所定の角度で傾斜して隣接する他のワイヤ５５と交差し、素線の撚り目７７はケーブルＣの進行方向に対して略垂直に当たるようにワイヤ５５が張設されている。
【００２７】
下部固定部材４３は、図４（ａ）に示すように、２つの円弧状の固定部材７９と、２つの固定部材７９間を連結する２つの連結部材８１とを有して構成されている。固定部材７９はその円周方向に所定の間隙を有して上下方向に貫通してワイヤ５５を挿通させる複数のワイヤ挿通孔５７と複数のねじ孔５３を有し、一方の端部には図４（ｂ）に示すフック８３が形成されている。連結部材８１は、図４（ｂ）に示すように、上下方向に所定の間隙を有して対抗配置された一対のピン保持板８１ａと、一対のピン保持板８１ａの両端部に連結された一対の連結ピン８１ｂとを有して構成されている。連結部材８１の一方の端部における一対のピン保持板８１ａ間に固定部材７９の端部が連結ピン８１ｂを介して枢結されている。
【００２８】
図３に示すように、下部固定部材４３の下部周縁には環状のワイヤ固定板５９が配設され、このワイヤ固定板５９を貫通する複数のボルト６１が下部固定部材４３に設けられたねじ孔５３に螺合してワイヤ固定板５９と下部固定部材４３間にワイヤ５５を挟み込んで固定している。
【００２９】
尚、フック８３は、図９（ａ）に示すように、フック８３の開口部８３ａ側におけるフック８３の基部に固定部材７９の他方の端部側へ傾斜する傾斜面８４を設けることができる。更に、図９（ｂ）に示すように、連結部材８１は、一対のピン保持板８１ａの外側外周面に固着されて一対のピン保持板８１ａから上方及び下方へ突出して固定部材７９に対して連結部材８１を水平方向に揺動させる揺動把手８２を有して構成することができる。また、揺動把手８２は一対のピン保持板８１ａから上方及び下方へ突出させる場合に限ることはなく、揺動把手８２を上方に配設されたピン保持板８１ａから上方へ突出させ、又は下方に配設されたピン保持板８１ａから下方へ突出させることができる。
【００３０】
次に、本発明のケーブル牽引装置１０の作用を、地下に布設されたトリプレックスケーブルを撤去させる撤去作業及び滑り防止装置の脱着作業に併せて説明する。尚、トリプレックスケーブルとは３本のケーブルを撚り合わせて１本のケーブルにしたものである。最初に、図５に示すように、地下に布設されたトリプレックスケーブル８５を撤去させるため作業現場にケーブル作業車１を移動させる。そして、隣接するケーブル作業穴８７に作業者（図示せず）が入り、布設されたトリプレックスケーブル８５を切断して所定の長さにする。トリプレックスケーブル８５が所定の長さに切断されると、作業者はケーブル作業車１の縁切りウィンチ６から図示しない牽引ワイヤを繰り出してその先端部を切断されたトリプレックスケーブル（以下、単に「ケーブルＣ」と記す。）の先端部に連結させた後に、縁切りウィンチ６を作動させてケーブルＣを車両側へ牽引する。そして、キャプスタンウィンチ１１を作動させてキャプスタン１５を矢印Ａ方向に回転させ、ケーブルＣをキャプスタン１５に約３回捲回させる。そして、キャプスタン１５からケーブルＣを引き出して図６に示す繰出装置２０の一対の牽引ローラ２７間にケーブルＣを挟装させる。
【００３１】
ここで、ケーブルＣを一対の牽引ローラ２７間に挟装させる際に、ケーブルＣの表面に滑剤と呼ばれる潤滑剤が塗布されていたり泥や水が付着している場合には、ケーブルＣと牽引ローラ２７間で滑りが発生する虞がある。そこで、この滑りを防止するために作業者は一対の牽引ローラ２７の各々に滑り防止装置４０を次の手順で装着する。即ち、図４（ｂ）に示す下部固定部材４３における一方の固定部材７９のフック８３を連結部材８１から取り外し、他の連結部材８１をヒンジとして使用して固定部材７９を左右方向へ揺動させて下部固定部材４３を拡開させる。そして、図３に示すように、滑り防止装置４０を牽引ローラ２７の上方から被せ、上部固定部材４１を上板２９の径方向外側に載置し、滑り防止部材４５をチューブ状胴部３３の周面外側に配設させ、拡開された下部固定部材４３を底板３１の径方向外側に掛け回す。そして、下部固定部材４３を締め上げ、図４（ｂ）に示すフック８３を連結部材８１の先端側の連結ピン８１ｂに掛止して、図３に示す下部固定部材４３を牽引ローラ２７の下部に密着させる。
【００３２】
下部固定部材４３が牽引ローラ２７の下部に密着した状態になると、下面係止突起６９が係止穴３５に係止された状態になるが、下面係止突起６９が係止穴３５に係止されていない場合には、回転防止本体部６７の位置を調整して下面係止突起６９を係止穴３５に係止させる。下部固定部材４３が牽引ローラ２７の下部に密着した状態にあり、且つ下面係止突起６９が係止穴３５に係止された状態になると、作業者はねじ本体部７５の摘み７５ｂを回して当接部７５ａを回転防止本体部６７の上面に当接させて支持部材６３を介して上部固定部材４１を上方へ引き上げる。上部固定部材４１が上方へ引き上げられると、滑り防止部材４５であるワイヤ５５が上方へ締め上げられて、ワイヤ５５がチューブ状胴部３３の外周面に確実強固に密着されて、滑り防止装置４０が牽引ローラ２７に装着される。
【００３３】
図６に示すように、一対の牽引ローラ２７間に滑り防止装置４０が装着された状態でこれらの間にケーブルＣが挟装されると、作業者は駆動軸３７を回転駆動させて一対の牽引ローラ２７を回転させる。一対の牽引ローラ２７が回転すると牽引ローラ２７がケーブルＣを図５に示すケーブル作業車１の前方側へ繰り出す。ケーブルＣが繰り出される際、一対の牽引ローラ２７は弾性変形しているので牽引ローラ２７とケーブルＣ間の接触面積は大きくなっている。また、牽引ローラ２７のチューブ状胴部３３に密着されたワイヤ５５がケーブルＣに当接して牽引ローラ２７とケーブルＣ間の滑りを防止するとともに、牽引ローラ２７の繰り出し力をケーブルＣに確実に伝達させる。このため、図５に示すように、キャプスタン１５から引き出されたケーブルＣは大きな尻手力で牽引される。そして、この状態で、キャプスタン１５を回転駆動させるとキャプスタン１５に捲回されたケーブルＣがキャプスタン１５上を滑ることなく牽引ローラ２７側へ牽引される。このため、地下に布設されたケーブルＣが順次牽引されて地下からこのケーブルＣを撤去することができる。
【００３４】
尚、図３に示すように、牽引ローラ２７に装着されたワイヤ５５の素線の撚り目７７はケーブルＣの延出方向に対して略垂直に当たるように配設されているので、牽引ローラ２７の回転力の殆どそのままをケーブルＣの繰り出す方向に作用させることができ大きな尻手力を得ることができる。また、図６に示すように、ケーブルＣはトリプレックスケーブル８５であり、これを牽引する際にケーブルＣ自体が捩れるとケーブルＣ全体の径が変化する場合があるが、この場合には、牽引ローラ２７が弾性変形してケーブル径の変化を吸収することができる。
【００３５】
さて、前述した実施の形態では牽引ローラ２７のチューブ状胴部３３の外周面を覆う手段としてワイヤ５５を使用した例を示したが、これに限るものではなく、図７に示すように、エキスパンドメタル８９を使用することができる。この場合、図７（ａ）及び（ｂ）に示すように、エキスパンドメタル８９は所定の幅を有した長方形状であり、隣接するエキスパンドメタル８９と所定の間隙を有して上部固定部材４１と下部固定部材４３間に複数配設されている。エキスパンドメタル８９の上部は上部固定部材４１に取り付けられ、エキスパンドメタル８９の下部は下部固定部材４３である有限長の下部固定ワイヤ９１に取り付けられている。下部固定ワイヤ９１の両端部には一対のフック９３が設けられている。この一対のフック９３を掛止することで、下部固定部材４３を牽引ローラ２７の下部に装着させることができる。このエキスパンドメタル８９を有した滑り防止装置４０を使用することで、図３に示すワイヤ５５を有した滑り防止装置４０と同様の効果を得ることができる。
【００３７】
次に、牽引ローラ２７に装着された滑り防止装置４０を脱着させる場合の作用について説明する。最初に、作業者が、図４（ａ）に示す連結部材８１の両端部に連結された一対の固定部材７９、７９を両手で把持し、これらを連結部材８１側（矢印Ａ方向側）へ引き寄せる。一対の固定部材７９、７９が連結部材８１側へ引き寄せられると、図４（ｂ）に示す連結部材８１の先端側の連結ピン８１ｂがフック８３の基部側へ移動する。そして、作業者が連結部材８１に枢結された左側の固定部材７９を手前側へ引き、又は連結部材８１を把持して手前側へ揺動させると、連結部材８１の先端側の連結ピン８１ｂがフック８３から取り外されて一対の固定部材７９間の連結が解除される。そして、図４（ａ）に示す下部固定部材４３を拡開させ、滑り防止装置４０を上方へ引き上げて、滑り防止装置４０を図３に示す牽引ローラ２７から脱着する。
【００３８】
また、図９に示す揺動把手８２や傾斜面８４を有した下部固定部材４３を備えた滑り防止装置４０を脱着させるには、作業者が、図９（ａ）に示すように、連結部材８１の両端部に連結された一対の固定部材７９、７９を両手で把持し、これらを連結部材８１側（矢印Ａ方向側）へ引き寄せる。一対の固定部材７９、７９が連結部材８１側へ引き寄せられると、連結部材８１の先端側の連結ピン８１ｂがフック８３の基部に形成された傾斜面８４側へ移動して傾斜面８４に当接する。そして、更に一対の固定部材７９、７９が連結部材８１側へ引き寄せられると、傾斜面８４に当接していた連結ピン８１ｂが傾斜面８４に沿ってフック８３の開口部８３ａ側（矢印Ｂ方向側）へ移動する。
【００３９】
これと同時に、連結部材８１が連結部材基端側の連結ピン８１ｂを揺動中心として外側へ揺動する。このため、連結部材先端側の連結ピン８１ｂがフック８３から取り外されて一対の固定部材７９間の連結を解除する。尚、連結ピン８１ｂがフック８３の開口部８３ａの近傍に移動している場合、一対の固定部材７９を連結部材８１側へ更に引き寄せなくても、作業者が揺動把手８２の上端及び下端のいずれかを把持して手前側へ引き寄せることで、連結部材先端側の連結ピン８１ｂをフック８３から容易に取り外すことができる。そして、下部固定部材４３を拡開させ、滑り防止装置４０を上方へ引き上げることで、滑り防止装置４０が図３に示す牽引ローラ２７から脱着される。このように、傾斜面８４や揺動把手８２を設けることで、一対の固定部材７９間の連結解除をより容易に行なうことができる。
【００４０】
【発明の効果】
以上説明したように、本発明のケーブル牽引装置によれば、牽引ローラの表面に滑り防止手段を装着することで、ケーブルの表面が滑り易い状態であってもケーブルと牽引ローラ間の滑りを防止することができ、布設されたケーブルを容易に撤去することができる。また、作業現場においてケーブルの表面状態に応じて滑り防止手段を牽引ローラに着脱することで、ケーブルの撤去作業を効率的に行なうことができる。更に、滑り防止手段を牽引ローラに着脱させることで、布設されたケーブルの表面を傷つけずに再使用するケーブルや傷つけてもよい廃棄ケーブルの両ケーブルの撤去作業を行なうことができ、廃棄ケーブル用の牽引ローラと再使用ケーブル用の牽引ローラの２種類のローラが不要となり経済的である。また、上部固定部材と下部固定部材の各周縁間に配設されたチューブ状胴部の外周面に滑り防止部材を覆い、張力調整手段により滑り防止部材の張力を調整し、回転防止部材により滑り防止部材の牽引ローラに対する回転を防止することで、牽引ローラのチューブ状胴部の外周面に滑り防止部材を確実に密着させることができ、ケーブルの表面が滑り易い状態であっても、ケーブルと牽引ローラ間の滑りを防止して、ケーブルを確実に牽引することができる。更に、牽引ローラは弾性変形可能なチューブ状胴部を有することで、一対の牽引ローラの中心間距離を調整する機構が不要であり、牽引ローラの構造を簡単にすることができる。
【００４１】
また、滑り防止部材は上部固定部材と下部固定部材間の周方向に所定の間隙を有して接続された複数のワイヤロープを有し、一対の牽引ローラ間にケーブルを挟装させた状態においてワイヤロープの素線の撚り目をケーブルの延出方向に対して略垂直に配設するとともに、ワイヤロープの張設方向を傾斜させて他のワイヤロープと交差させる場合には、ケーブルと牽引ローラ間の滑りを防止することができ、ケーブルに当接するワイヤロープの接触面積を大きくすることができ、一対の牽引ローラ間に挟装されたケーブルを確実に牽引させることができる。
【００４２】
更に、下部固定部材は少なくとも２つの固定部材を有し、ヒンジを介して拡開自在とし連結部材を介して連結可能とする場合には、滑り防止部材を牽引ローラに容易に着脱させることができる。また、下面係止突部を係止穴に係止させ側面係止突部を突出部材と係合させる場合には、回転防止本体部が上板に固定されて滑り防止部材の牽引ローラに対する回転を防止することができる。更に、上部固定部材に突設された支持部材に上下方向に移動可能なねじ本体部を設ける場合には、ねじ本体部を移動させることで牽引ローラに対して上部固定部材を上下方向に移動させて、滑り防止部材の張力調整を容易に行なうことができる。
【図面の簡単な説明】
【図１】本発明の一実施の形態におけるケーブル牽引装置を搭載したケーブル作業車の正面図を示す。
【図２】本発明の一実施の形態におけるケーブル牽引装置を搭載したケーブル作業車の平面図を示す。
【図３】本発明の一実施の形態における滑り防止装置を装着した牽引ローラの正面図を示す。
【図４】本発明の一実施の形態における滑り防止装置を示し、同図（ａ）は滑り防止装置の斜視図であり、同図（ｂ）は下部固定部材の要部を示した斜視図である。
【図５】本発明の一実施の形態におけるケーブル牽引装置の作用を説明するための図である。
【図６】本発明の一実施の形態におけるケーブル牽引装置の作用を説明するための図である。
【図７】本発明の一実施の形態における滑り防止装置を示し、同図（ａ）は滑り防止装置の斜視図であり、同図（ｂ）は滑り防止装置を装着した牽引ローラの正面図である。
【図８】本発明の一実施の形態における滑り防止装置を示し、同図（ａ）は滑り防止装置の斜視図であり、同図（ｂ）は滑り防止装置を装着した牽引ローラの正面図である。
【図９】本発明の一実施の形態における下部固定部材を示し、同図（ａ）は下部固定部材の要部平面図であり、同図（ｂ）は連結部材の正面図である。
【符号の説明】
１０ケーブル牽引装置
２７牽引ローラ
２９上板
３１底板
３３チューブ状胴部
３５係止穴
４０滑り防止装置（滑り防止手段）
４１上部固定部材
４３下部固定部材
４５滑り防止部材
４７回転防止部材
４９張力調整手段
５５ワイヤ（ワイヤロープ）
６３支持部材
６５挿通孔（係合凹部）
６７回転防止本体部
６９下面係止突起（下面係止突部）
７１側面係止突起（側面係止突部）
７５ねじ本体部
７７撚り目
７９固定部材
８１連結部材（ヒンジ）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cable pulling device, and more particularly, a cable pulling device that winds a cable laid in the basement around a capstan winch, pulls a cable drawn from the capstan winch, and removes the cable laid. About.
[0002]
[Prior art]
For example, a cable work vehicle is used in laying / removing electric wires (cables) such as power cables and communication cables. Some cable work vehicles have a cable traction device mounted on the vehicle body. The cable pulling device includes a capstan winch disposed at the rear of the vehicle body and a cable feeding device disposed on the vehicle front side of the capstan winch. The capstan winch has a swing arm that is swingably provided at the rear of the vehicle body, and a capstan winch that is rotatably provided is attached to the swing arm. The capstan winch has a large-diameter capstan rotatably provided on the swing arm and a drive motor that rotationally drives the capstan. On the front side of the vehicle from the capstan, there is provided a feeding device for drawing out the cable drawn from the capstan to the front side of the vehicle and pulling the installed cable.
[0003]
The feeding device is disposed in the width direction of the cable to be pulled and has a pair of pulling rollers that are driven to rotate while the cable is sandwiched to feed the cable. The pulling roller has a cylindrical shape and is an air-injecting ball-shaped rotating body that is made of rubber and can be elastically deformed when air is injected into the inside and an external force is applied. When the cable pulled out from the capstan winch is drawn out by this pulling roller, the pulling roller can be elastically deformed, so the contact area with the cable can be increased and the cable drawing force can be increased. Noise can be reduced.
[0004]
Also, when pulling a so-called triplex cable in which three cables are twisted by a pair of pulling rollers, even if the diameter of the entire cable changes during towing, the diameter of the entire cable changes due to elastic deformation of the pulling roller. Since it can absorb, the adjustment mechanism for adjusting the center distance of a pair of pulling rollers is unnecessary, and the structure of the feeding device can be simplified.
[0005]
[Problems to be solved by the invention]
Here, there are two ways to remove the installed cable: when the removed cable is discarded and when it is reused. When the cable is discarded, the cable surface may be damaged. However, when it is reused, the cable surface cannot be damaged.
[0006]
However, in the air-injection type pulling roller, the friction between the cable and the pulling roller that is pulled depending on the surface state of the cable is reduced, and the cable may slide between the pulling rollers. In particular, in laying work for underground cable work, there is a case where a lubricant called a lubricant is applied to the surface of the cable in order to reduce the pipe resistance during laying, and in this case, the cable is laid between the cable and the pulling roller. The coefficient of friction is greatly reduced. In addition, mud and water adhere to the surface of the cable that has been in the pipeline for many years, and a reduction in the coefficient of friction cannot be avoided. For this reason, in the removal work of the underground cable work, there is a problem that the cable cannot be pulled due to slippage between the pulling rollers, and the removal work is often interrupted. To solve this problem, a toothed roller has been proposed in which the surface of the pulling roller is roughened and bites into the cable surface. If this toothed roller is used for a cable that is reused, the cable surface is damaged and the cable cannot be reused. become.
[0007]
The present invention has been made in view of such problems, and a cable pulling device that can pull a cable even when the cable surface is slippery and can be pulled without damaging the surface with a reused cable. The purpose is to provide.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the cable pulling device of the present invention is connected between the upper and bottom plates opposed to each other with a predetermined gap in the vertical direction, and between the peripheral edges of the upper and bottom plates, and the air is inside. In a cable pulling device having a pair of pulling rollers having a tubular body portion that is injected and expands radially outward and is elastically deformable, slip prevention means that can be detachably mounted on each surface of the pair of pulling rollers The anti-slip means includes an annular upper fixing member disposed at the upper part of the pulling roller and radially outside the upper plate, and is detachably disposed at the lower part of the pulling roller and radially outward of the bottom plate. To prevent the rotation of the anti-slip member with respect to the traction roller, the annular lower fixing member provided, the anti-slip member connected between the peripheral edges of the upper fixing member and the lower fixing member and covering the outer peripheral surface of the tubular body. Detachable on top plate An anti-rotation member attached to the upper fixing member and connected to the upper fixing member to adjust the tension of the anti-slip member, and a tension adjusting means for moving the upper fixing member in the vertical direction with respect to the anti-rotation member. It has.
[0009]
According to the cable pulling device having the above-described configuration, when the slip prevention means is attached to each surface of the pair of pulling rollers and the cable is sandwiched between the pair of pulling rollers, the slip prevention means is connected to the cable. And the pair of pulling rollers are prevented from slipping, and the pulling rollers pull the cable. In addition, the pulling roller has a tube-shaped body portion that is inflated radially inward and is elastically deformed when air is injected therein, so that the diameter of the cable sandwiched between the pair of pulling rollers is small. Even if it changes, the pulling roller is elastically deformed to absorb the change in the cable diameter.
[0010]
By mounting slip prevention means on the surface of the pulling roller in this way, slipping between the cable and the pulling roller can be prevented even when the surface of the cable is slippery, and the installed cable can be easily removed. can do. Moreover, the removal work of a cable can be efficiently performed by attaching or detaching a slip prevention means to a pulling roller according to the surface state of the cable at a work site. Furthermore, since the slip prevention means is detachable from the pulling roller, it is possible to carry out the removal work of both the reusable cable and the waste cable that may be damaged without damaging the surface of the installed cable. Therefore, it is not necessary to prepare two types of rollers, ie, a pulling roller for a reusable cable and a pulling roller for a reuse cable, which is economical.
[0011]
In addition, the anti-slip member is covered on the outer peripheral surface of the tube-shaped body disposed between the peripheral edges of the upper fixing member and the lower fixing member, the tension of the anti-slip member is adjusted by the tension adjusting means, and the slip is prevented by the anti-rotation member. By preventing the prevention member from rotating with respect to the traction roller, the slip prevention member can be securely adhered to the outer peripheral surface of the tubular body of the traction roller, and even if the surface of the cable is slippery, The cable can be reliably pulled by preventing slippage between the pulling rollers. Furthermore, since the pulling roller has a tube-shaped body portion that can be elastically deformed, a mechanism for adjusting the distance between the centers of the pair of pulling rollers is unnecessary, and the structure of the pulling roller can be simplified.
[0012]
In the cable pulling device having the above configuration, the slip prevention member includes a plurality of wire ropes (for example, the wires 55 in the embodiment) connected with a predetermined gap in the circumferential direction between the upper fixing member and the lower fixing member. The wire rope is formed by twisting a plurality of strands, and the plurality of wire ropes are inclined at a predetermined angle and intersect with other adjacent wire ropes, and the strands of the strands with respect to the traveling direction of the cable It is preferable that they are arranged so as to be substantially vertical.
[0013]
According to the cable pulling device having the above-described configuration, when the cable is sandwiched between the pair of pulling rollers, the strands of the strands are substantially perpendicular to the traveling direction of the cable. The wire rope intersects with other wire ropes. Therefore, the force transmitted from the strands of the strands to the cable can be reliably transmitted to the cable, the contact area of the wire rope with the cable can be increased, and the slip between the cable and the pulling roller can be prevented. The cable sandwiched between the pair of pulling rollers can be reliably pulled by reliably preventing the cable.
[0014]
  In the cable pulling device having the above configuration, the lower fixing member has at least two fixing members, and one end of one fixing member is adjacent to one end of the other fixing member and a hinge (for example, the connecting member 81 in the embodiment). And the other end of the one fixing member is connected to the other end of the other fixing member via the connecting member, and the upper surface of the upper plate is disposed with a predetermined gap therebetween. The anti-rotation member includes an anti-rotation main body portion placed on the upper plate, and a lower surface engagement protrusion that protrudes from the lower surface of the anti-rotation main body portion and is engaged with the engagement hole. Portion (for example, the lower surface locking projection 69 in the embodiment), the side surface locking projection (for example, the side surface locking projection 71 in the embodiment) protruding from the side surface of the rotation prevention main body, and the upper surface of the upper fixing member Protruded intosupportA member (for example, the support member 63 in the embodiment);supportThere is an engaging recess (for example, the insertion hole 65 in the embodiment) that is provided on the member and engages the side surface locking projection to prevent the upper fixing member from rotating and allows the upper fixing member to move in the vertical direction. The tension adjusting means includes a support member that protrudes from the upper surface of the upper fixing member and extends above the anti-rotation main body, and a screw that engages with the support member above the anti-rotation main body and moves in the vertical direction. A screw main body part (for example, in the embodiment) in which the lower end part is in contact with the upper surface of the anti-rotation main body part and the upper fixing member is moved up and down via the support memberScrew body75), and by moving the screw main body portion in the vertical direction, the tension of the anti-slip member may be adjusted via the upper fixing member.
[0015]
According to the cable pulling device having the above configuration, in order to attach the slip prevention means to the pulling roller, the connecting member of the lower fixing member is released and the adjacent fixing member is expanded with the hinge as the center. Then, the upper fixing member is placed on the upper plate, and the expanded lower fixing member is wound around the outer side in the radial direction of the bottom plate, and then the expanded fixing member is tightened and connected via the connecting member to fix the lower portion. The member is attached to the lower part of the pulling roller. The lower surface locking projection of the rotation prevention main body is locked in the locking hole, and the side locking projection is engaged with the engagement recess. Then, the screw body is rotated to move the upper fixing member in the vertical direction to adjust the tension of the anti-slip member (increase the tension). Further, in order to remove the slip prevention means attached to the pulling roller, the screw body is rotated to reduce the tension of the slip prevention member. Then, after releasing the connecting member of the lower fixing member and expanding the fixing member to remove the lower fixing member from the pulling roller, the upper fixing member is lifted upward to separate the anti-slip means from the pulling roller.
[0016]
In this way, the lower fixing member has at least two fixing members, and can be easily detachably attached to the pulling roller by making it expandable via the hinge and being connectable via the connecting member. it can. In addition, the lower surface locking projection is locked in the locking hole and the side surface locking projection is engaged with the protruding member, so that the rotation prevention main body is fixed to the upper plate and the antislip member rotates relative to the traction roller. Can be prevented. Furthermore, a screw main body portion that is movable in the vertical direction is provided on the support member protruding from the upper fixing member, and the upper fixing member can be moved in the vertical direction with respect to the pulling roller by moving the screw main body portion. It is possible to easily adjust the tension of the slip prevention member.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. This embodiment shows an aspect of a cable work vehicle in which electric wires, communication cables and the like are laid and removed. Before describing the cable traction device of the present invention, a cable work vehicle equipped with the cable traction device will be described with reference to FIGS. 1 and 2. FIG. 1 shows a front view of a cable work vehicle, and FIG. 2 shows a plan view of the cable work vehicle. As shown in FIG. 1, the cable work vehicle 1 has a driving cabin 5 at the front portion of a vehicle body 3, and an edge cutting winch 6 that protrudes downward is attached to the rear portion of the vehicle body.
[0018]
Next, the cable pulling device 10 will be described. The cable pulling device 10 is provided on the vehicle body 3 at the rear of the vehicle with respect to the driving cabin 5, and includes a capstan winch 11 and a feeding device 20. The capstan winch 11 includes a swing arm 13 pivotally supported at both left and right ends of the rear part of the vehicle body so as to be swingable in the vertical direction, a capstan 15 rotatably provided between the swing arms 13, and the capstan 15. And a hydraulic motor 17 for rotation. A swing cylinder 19 is pivotally connected between the lower portion of the swing arm 13 and the central portion of the vehicle body 3, and the swing arm 13 swings in the vertical direction by the expansion and contraction movement of the swing cylinder 19, and the capstan 15. The position of the vehicle can be adjusted in the front-rear and vertical directions of the vehicle.
[0019]
As shown in FIG. 2, the capstan 15 is configured such that the outer diameter of the trunk portion 15 a expands from the central portion of the capstan 15 toward the vehicle right side (left side in FIG. 2). A cable C is wound around 15a. When the cable C drawn from the trunk portion 15a to the driving cabin 5 side is pulled to the driving cabin 5 side, and the tension acting on the vehicle rear lower side acts on the cable C extending from the trunk portion 15a to the vehicle rear lower side, Friction is generated between the cable C wound around the trunk portion 15a and friction is also generated between the cable C and the trunk portion 17a. The cable C is brought into close contact with the central portion of the trunk portion 15a, and the cable C is connected to the trunk portion 15a. A force that does not slide up (hereinafter, this force is referred to as “butt force”) is generated. For this reason, even if the cable C extending to the vehicle rear lower side is applied with the tension acting on the vehicle rear lower side, if the trailing force is large, the cable C wound around the trunk portion 17a is placed on the trunk portion 17a. Never slip.
[0020]
A feeding device 20 is provided between the capstan winch 11 and the driving cabin 5 to pull the cable C drawn from the capstan 15 and feed it forward of the driving cabin 5. The feeding device 20 is attached to an upper portion of a power unit 21 incorporating a driving source such as a hydraulic motor (not shown). The feeding device 20 is disposed in the width direction of the cable C between the pair of guide rollers 25 and a pair of guide rollers 25 provided on the front and rear of the base 23, and sandwiches the cable C therebetween. It has a pair of pulling rollers 27 that pulls the cable C drawn from the capstan winch 11 by being rotationally driven in this state.
[0021]
As shown in FIG. 3, the pulling roller 27 has an elliptical shape when viewed from the front, and has a disk-shaped upper plate 29 and a bottom plate 31 that are opposed to each other with a predetermined gap in the vertical direction, and an upper plate 29 and a bottom plate. The tube body 33 is connected between the peripheral edges of 31 and is inflated radially inward and elastically deformed by being inflated radially inside. The upper plate 29 is provided with a pair of locking holes 35 arranged with a predetermined gap. A drive shaft 37 that protrudes upward from the base 23 and can be driven to rotate is connected to the bottom plate 31, and the pulling roller 27 is configured to rotate via the bottom plate 31 when the drive shaft 37 rotates.
[0022]
An anti-slip device 40 for preventing slippage between the cable C and the pair of pulling rollers 27 is detachably mounted on the outer side of the tubular body 33 of the pulling roller 27. As shown in FIGS. 3 and 4, the anti-slip device 40 includes an annular upper fixing member 41 placed on the upper side of the pulling roller 27 and radially outside the upper plate 29, and a lower portion of the pulling roller 27. An annular lower fixing member 43 that is detachably attached to the outer side in the radial direction of the bottom plate 31, and is connected between the peripheral edges of the upper fixing member 41 and the lower fixing member 43 to cover the outer peripheral surface of the tubular body 33. An anti-slip member 45, an anti-rotation member 47 detachably mounted on the upper plate 29 to prevent the anti-slip member 45 from rotating relative to the pulling roller 27, and an upper fixing member to adjust the tension of the anti-slip member 45 41, and a tension adjusting means 49 that moves the upper fixing member 41 in the vertical direction with respect to the rotation preventing member 47.
[0023]
More specifically, a through hole 51 is provided in the central portion of the upper fixing member 41 shown in FIG. 4, and the inner diameter of the through hole 51 is larger than the outer diameter of the upper plate 29. The through hole 51 is engaged with the outer side in the radial direction. A plurality of screw holes 53 arranged with a predetermined gap and a plurality of wire insertion holes 57 through which the wires 55 are inserted are provided at the peripheral edge of the upper fixing member 41. An annular wire fixing plate 59 is placed on the upper peripheral edge of the upper fixing member 41 shown in FIG. 3, and a plurality of bolts 61 passing through the wire fixing plate 59 are screwed into the screw holes 53 provided in the upper fixing member 41. In combination, the wire 55 is sandwiched and fixed between the wire fixing plate 59 and the upper fixing member 41. An inverted U-shaped support member 63 straddling the through hole 51 is fixed to the central portion of the upper surface of the upper fixing member 41, and an insertion hole 65 extending in the vertical direction is provided in the middle portion of both side walls of the support member 63. Is provided. An anti-rotation main body 67 having a rectangular parallelepiped shape is placed on the upper portion of the upper plate 29. The bottom surface of the anti-rotation main body portion 67 is provided with a pair of lower surface locking projections 69 protruding downward and arranged with a predetermined gap. The left and right ends of the upper surface of the anti-rotation main body portion 67 protrude in the left-right direction. A pair of side surface locking projections 71 are provided. The pair of lower surface locking projections 69 are locked in the pair of locking holes 35, and the pair of side surface locking projections 71 are disposed so as to be inserted through the insertion holes 65.
[0024]
  An insertion hole (not shown) is provided at the center of the support member 63, and a nut 73 having a female screw threaded inside is attached to the bottom surface of the support member 63 below the insertion hole. The female screw of the nut 73 has a plate-like contact portion 75a at the lower end and a disk-like knob 75b at the tip.Screw body75 is screwed.
[0025]
  That is, the rotation preventing member 47 is configured to include a rotation preventing main body 67, a lower surface locking protrusion 69, a side surface locking protrusion 71, and an insertion hole 65 provided in the support member 63. In addition, the tension adjusting means 49 includes the support member 63 andScrew body75.
[0026]
As shown in FIG. 3, the anti-slip member 45 includes a wire 55 that is stretched with a predetermined gap in the circumferential direction between the upper fixing member 41 and the lower fixing member 43. The wire 55 is formed by twisting a plurality of strands, the wire 55 is inclined at a predetermined angle and intersects with another adjacent wire 55, and the strand 77 of the strand is in the traveling direction of the cable C. A wire 55 is stretched so as to be substantially perpendicular.
[0027]
As shown in FIG. 4A, the lower fixing member 43 includes two arc-shaped fixing members 79 and two connecting members 81 that connect the two fixing members 79. The fixing member 79 has a plurality of wire insertion holes 57 and a plurality of screw holes 53 that pass through the wire 55 in a vertical direction with a predetermined gap in the circumferential direction. A hook 83 shown in FIG. 4 (b) is formed. As shown in FIG. 4 (b), the connecting member 81 is connected to a pair of pin holding plates 81a arranged to face each other with a predetermined gap in the vertical direction, and to both ends of the pair of pin holding plates 81a. And a pair of connecting pins 81b. Between the pair of pin holding plates 81a at one end of the connecting member 81, the end of the fixing member 79 is pivotally connected via the connecting pin 81b.
[0028]
As shown in FIG. 3, an annular wire fixing plate 59 is disposed on the lower periphery of the lower fixing member 43, and a plurality of bolts 61 penetrating the wire fixing plate 59 are provided in the lower fixing member 43. A wire 55 is sandwiched and fixed between the wire fixing plate 59 and the lower fixing member 43 by being screwed to 53.
[0029]
As shown in FIG. 9A, the hook 83 can be provided with an inclined surface 84 that is inclined toward the other end of the fixing member 79 at the base of the hook 83 on the opening 83 a side of the hook 83. Further, as shown in FIG. 9B, the connecting member 81 is fixed to the outer peripheral surface of the pair of pin holding plates 81 a and protrudes upward and downward from the pair of pin holding plates 81 a to the fixing member 79. The connecting member 81 can be configured to have a swinging handle 82 that swings in the horizontal direction. The swing handle 82 is not limited to the case where the swing handle 82 protrudes upward and downward from the pair of pin holding plates 81a, but the swing handle 82 protrudes upward from the pin holding plate 81a disposed above or below. It is possible to project downward from the pin holding plate 81a disposed on the surface.
[0030]
Next, the operation of the cable pulling device 10 of the present invention will be described together with the removal work for removing the triplex cable laid in the basement and the attachment / detachment work for the slip prevention device. The triplex cable is a cable obtained by twisting three cables into one cable. First, as shown in FIG. 5, the cable work vehicle 1 is moved to the work site in order to remove the triplex cable 85 installed underground. Then, an operator (not shown) enters the adjacent cable work hole 87, and the installed triplex cable 85 is cut to a predetermined length. When the triplex cable 85 is cut to a predetermined length, the operator feeds a tow wire (not shown) from the edge cutting winch 6 of the cable work vehicle 1 and cuts the tip thereof (hereinafter simply referred to as “cable”). C ”.), The edge cutting winch 6 is actuated to pull the cable C to the vehicle side. Then, the capstan winch 11 is operated to rotate the capstan 15 in the direction of arrow A, and the cable C is wound around the capstan 15 about three times. Then, the cable C is pulled out from the capstan 15 and the cable C is sandwiched between the pair of pulling rollers 27 of the feeding device 20 shown in FIG.
[0031]
Here, when the cable C is sandwiched between the pair of pulling rollers 27, if a lubricant called a lubricant is applied to the surface of the cable C or mud or water adheres, the cable C and the tow are pulled. There is a risk of slippage between the rollers 27. Therefore, in order to prevent this slipping, the operator attaches the slip prevention device 40 to each of the pair of pulling rollers 27 in the following procedure. That is, the hook 83 of one fixing member 79 in the lower fixing member 43 shown in FIG. 4B is removed from the connecting member 81, and the other connecting member 81 is used as a hinge to swing the fixing member 79 in the left-right direction. The lower fixing member 43 is expanded. Then, as shown in FIG. 3, the anti-slip device 40 is placed over the pulling roller 27, the upper fixing member 41 is placed on the outer side in the radial direction of the upper plate 29, and the anti-slip member 45 is attached to the tube-shaped body portion 33. The lower fixing member 43, which is disposed outside the peripheral surface and is expanded, is hung around the radially outer side of the bottom plate 31. Then, the lower fixing member 43 is tightened, the hook 83 shown in FIG. 4B is hooked on the connecting pin 81b on the distal end side of the connecting member 81, and the lower fixing member 43 shown in FIG. Adhere to.
[0032]
  When the lower fixing member 43 is in close contact with the lower portion of the pulling roller 27, the lower surface locking projection 69 is locked in the locking hole 35, but the lower surface locking projection 69 is locked in the locking hole 35. If not, the position of the anti-rotation main body 67 is adjusted to lock the lower surface locking projection 69 in the locking hole 35. When the lower fixing member 43 is in close contact with the lower portion of the pulling roller 27 and the lower surface locking projection 69 is locked in the locking hole 35, the operatorScrew body 75The knob 75b is turned to bring the contact portion 75a into contact with the upper surface of the anti-rotation main body 67, and the upper fixing member 41 is pulled upward via the support member 63. When the upper fixing member 41 is pulled upward, the wire 55 which is the anti-slip member 45 is tightened upward, and the wire 55 is firmly and firmly adhered to the outer peripheral surface of the tubular body 33, so that the anti-slip device 40 is secured. Is attached to the pulling roller 27.
[0033]
As shown in FIG. 6, when the cable C is sandwiched between the pair of pulling rollers 27 and the anti-slip device 40 is mounted, the operator rotates the drive shaft 37 to rotate the pair of the pair of pulling rollers 27. The pulling roller 27 is rotated. When the pair of pulling rollers 27 rotate, the pulling rollers 27 feed the cable C to the front side of the cable work vehicle 1 shown in FIG. When the cable C is unwound, the pair of pulling rollers 27 are elastically deformed, so that the contact area between the pulling rollers 27 and the cable C is large. Further, the wire 55 that is in close contact with the tubular body 33 of the pulling roller 27 contacts the cable C to prevent slippage between the pulling roller 27 and the cable C, and the feeding force of the pulling roller 27 is reliably applied to the cable C. Communicate. For this reason, as shown in FIG. 5, the cable C pulled out from the capstan 15 is pulled with a large tail force. In this state, when the capstan 15 is driven to rotate, the cable C wound around the capstan 15 is pulled toward the pulling roller 27 without sliding on the capstan 15. For this reason, the cable C laid in the basement can be sequentially pulled and removed from the basement.
[0034]
As shown in FIG. 3, the strands 77 of the wire 55 attached to the pulling roller 27 are disposed so as to be substantially perpendicular to the extending direction of the cable C. Most of the rotational force can be applied in the direction in which the cable C is fed out, so that a large tail force can be obtained. Also, as shown in FIG. 6, the cable C is a triplex cable 85, and when the cable C is twisted when pulling the cable C, the diameter of the entire cable C may change. In this case, The pulling roller 27 can be elastically deformed to absorb the change in the cable diameter.
[0035]
In the above-described embodiment, the example in which the wire 55 is used as the means for covering the outer peripheral surface of the tubular body 33 of the pulling roller 27 is shown. However, the present invention is not limited to this, and as shown in FIG. Metal 89 can be used. In this case, as shown in FIGS. 7A and 7B, the expanded metal 89 has a rectangular shape with a predetermined width, and has a predetermined gap with the adjacent expanded metal 89 and the upper fixing member 41. A plurality of lower fixing members 43 are disposed. The upper part of the expanded metal 89 is attached to the upper fixing member 41, and the lower part of the expanded metal 89 is attached to a finite-length lower fixing wire 91 that is the lower fixing member 43. A pair of hooks 93 are provided at both ends of the lower fixing wire 91. The lower fixing member 43 can be attached to the lower part of the pulling roller 27 by hooking the pair of hooks 93. By using the anti-slip device 40 having the expanded metal 89, the same effect as the anti-slip device 40 having the wire 55 shown in FIG. 3 can be obtained.
[0037]
Next, an operation when the slip prevention device 40 attached to the pulling roller 27 is detached will be described. First, an operator grasps a pair of fixing members 79 and 79 connected to both ends of the connecting member 81 shown in FIG. 4A with both hands, and moves them to the connecting member 81 side (arrow A direction side). Draw. When the pair of fixing members 79 are pulled toward the connecting member 81, the connecting pin 81 b on the distal end side of the connecting member 81 shown in FIG. 4B moves to the base side of the hook 83. Then, when the operator pulls the left fixing member 79 pivotally connected to the connecting member 81 toward the near side or grips the connecting member 81 and swings it toward the near side, the connecting pin 81b on the distal end side of the connecting member 81 is connected. Is removed from the hook 83, and the connection between the pair of fixing members 79 is released. Then, the lower fixing member 43 shown in FIG. 4A is expanded, the anti-slip device 40 is pulled upward, and the anti-slip device 40 is detached from the pulling roller 27 shown in FIG.
[0038]
Further, in order to detach and attach the anti-slip device 40 including the lower fixing member 43 having the swinging handle 82 and the inclined surface 84 shown in FIG. 9, the operator can connect the connecting member as shown in FIG. A pair of fixing members 79 and 79 connected to both ends of 81 are gripped with both hands, and these are pulled toward the connecting member 81 side (arrow A direction side). When the pair of fixing members 79 are pulled toward the connecting member 81, the connecting pin 81 b on the distal end side of the connecting member 81 moves toward the inclined surface 84 formed at the base of the hook 83 and comes into contact with the inclined surface 84. . When the pair of fixing members 79 are further pulled toward the connecting member 81 side, the connecting pin 81b that has been in contact with the inclined surface 84 is moved along the inclined surface 84 to the opening 83a side (arrow B direction side) of the hook 83. Move to).
[0039]
At the same time, the connecting member 81 swings outward with the connecting pin 81b on the base end side of the connecting member as the swing center. For this reason, the connecting pin 81b on the distal end side of the connecting member is removed from the hook 83 and the connection between the pair of fixing members 79 is released. When the connecting pin 81b is moved in the vicinity of the opening 83a of the hook 83, the operator can move the upper and lower ends of the swing handle 82 without further pulling the pair of fixing members 79 toward the connecting member 81 side. The connection pin 81 b on the distal end side of the connection member can be easily detached from the hook 83 by grasping either one and pulling it toward the front side. Then, by expanding the lower fixing member 43 and pulling up the anti-slip device 40 upward, the anti-slip device 40 is detached from the pulling roller 27 shown in FIG. Thus, by providing the inclined surface 84 and the swing handle 82, the connection between the pair of fixing members 79 can be more easily released.
[0040]
【The invention's effect】
As described above, according to the cable pulling device of the present invention, slipping between the cable and the pulling roller can be prevented even when the cable surface is slippery by attaching the slip preventing means to the surface of the pulling roller. The installed cable can be easily removed. Moreover, the removal work of a cable can be efficiently performed by attaching or detaching a slip prevention means to a pulling roller according to the surface state of the cable at a work site. Furthermore, by removing the slip prevention means from the pulling roller, it is possible to remove both the cables that will be reused and the waste cables that may be damaged without damaging the surface of the installed cables. Two types of rollers, a pulling roller for a reusable cable and a pulling roller for a reuse cable, are unnecessary and economical. In addition, the anti-slip member is covered on the outer peripheral surface of the tube-shaped body disposed between the peripheral edges of the upper fixing member and the lower fixing member, the tension of the anti-slip member is adjusted by the tension adjusting means, and the slip is prevented by the anti-rotation member. By preventing the prevention member from rotating with respect to the traction roller, the slip prevention member can be securely adhered to the outer peripheral surface of the tubular body of the traction roller, and even if the surface of the cable is slippery, The cable can be reliably pulled by preventing slippage between the pulling rollers. Furthermore, since the pulling roller has a tube-shaped body portion that can be elastically deformed, a mechanism for adjusting the distance between the centers of the pair of pulling rollers is unnecessary, and the structure of the pulling roller can be simplified.
[0041]
The slip prevention member has a plurality of wire ropes connected with a predetermined gap in the circumferential direction between the upper fixing member and the lower fixing member, and the cable is sandwiched between the pair of pulling rollers. When the strands of the wire rope strands are arranged substantially perpendicular to the cable extension direction, and when the wire rope tension direction is inclined and intersects with other wire ropes, the cable and pulling roller It is possible to prevent slipping between the wires, increase the contact area of the wire rope contacting the cable, and reliably pull the cable sandwiched between the pair of pulling rollers.
[0042]
Further, the lower fixing member has at least two fixing members. When the lower fixing member can be expanded via the hinge and can be connected via the connecting member, the anti-slip member can be easily attached to and detached from the pulling roller. . In addition, when the lower surface locking protrusion is locked to the locking hole and the side surface locking protrusion is engaged with the protruding member, the rotation preventing main body is fixed to the upper plate and the antislip member rotates relative to the pulling roller. Can be prevented. Further, when a screw main body portion that can move in the vertical direction is provided on the support member protruding from the upper fixing member, the upper fixing member is moved in the vertical direction with respect to the pulling roller by moving the screw main body portion. Thus, the tension of the anti-slip member can be easily adjusted.
[Brief description of the drawings]
FIG. 1 is a front view of a cable work vehicle equipped with a cable traction device according to an embodiment of the present invention.
FIG. 2 is a plan view of a cable work vehicle equipped with a cable pulling device according to an embodiment of the present invention.
FIG. 3 is a front view of a pulling roller equipped with a slip prevention device according to an embodiment of the present invention.
4A and 4B show an anti-slip device according to an embodiment of the present invention, in which FIG. 4A is a perspective view of the anti-slip device, and FIG. 4B is a perspective view showing a main part of a lower fixing member. It is.
FIG. 5 is a view for explaining the operation of the cable pulling device according to the embodiment of the present invention.
FIG. 6 is a diagram for explaining the operation of the cable pulling device according to the embodiment of the present invention.
7A and 7B show an anti-slip device according to an embodiment of the present invention, where FIG. 7A is a perspective view of the anti-slip device, and FIG. 7B is a front view of a pulling roller equipped with the anti-slip device. It is.
8A and 8B show a slip prevention device according to an embodiment of the present invention, in which FIG. 8A is a perspective view of the slip prevention device, and FIG. 8B is a front view of a pulling roller equipped with the slip prevention device. It is.
9A and 9B show a lower fixing member according to an embodiment of the present invention, in which FIG. 9A is a plan view of a main part of the lower fixing member, and FIG. 9B is a front view of a connecting member.
[Explanation of symbols]
10 Cable pulling device
27 Traction roller
29 Upper plate
31 Bottom plate
33 Tube-shaped body
35 Locking hole
40 Anti-slip device (slip prevention means)
41 Upper fixing member
43 Lower fixing member
45 Anti-slip material
47 Anti-rotation member
49 Tension adjusting means
55 wire (wire rope)
63Support member
65 Insertion hole (engagement recess)
67 Anti-rotation body
69 Bottom locking projection (bottom locking projection)
71 Side locking projection (side locking projection)
75Screw body
77 Twist
79 Fixing member
81 Connecting member (hinge)

Claims

An upper plate and a bottom plate that are arranged to face each other with a predetermined gap in the vertical direction, and a tube that is connected between the peripheral edges of the upper plate and the bottom plate and is inflated outwardly in the radial direction and elastically deformed. In a cable pulling device provided with a pair of pulling rollers having a cylindrical body part,
The anti-slip means detachably attachable to each surface of the pair of pulling rollers, and the anti-slip means is an annular portion disposed on the radially outer side of the upper plate at the upper part of the pulling roller. An upper fixing member, an annular lower fixing member that is detachably disposed on the outer side of the bottom plate in the radial direction below the pulling roller, and each peripheral edge of the upper fixing member and the lower fixing member are connected to each other. An anti-slip member that covers the outer peripheral surface of the tubular body, and an anti-rotation member that is detachably mounted on the upper plate and connected to the upper fixing member to prevent the anti-slip member from rotating relative to the pulling roller. and member, Ri Na and a tension adjusting means for moving the upper fixing member in the vertical direction with respect to the rotation preventing member is connected to the upper fixing member for adjusting the tension of the anti-slip member,
The anti-slip member has a plurality of wire ropes connected with a predetermined gap in the circumferential direction between the upper fixing member and the lower fixing member, and the wire rope twists a plurality of strands. The plurality of wire ropes are inclined at a predetermined angle and intersect with other adjacent wire ropes .

The cable pulling device according to claim 1, wherein the plurality of wire ropes are arranged so that the strands of the strands are substantially perpendicular to the traveling direction of the cable.

The lower fixing member has at least two fixing members, and one end of one fixing member is connected to one end of the other fixing member adjacent via a hinge, and the other end of the one fixing member is adjacent to the other fixing member. Connected to the other end of the other fixing member via a connecting member,
A plurality of locking holes arranged on the upper surface of the upper plate with a predetermined gap between each other;
The anti-rotation member includes an anti-rotation main body portion placed on the upper plate, a lower surface locking protrusion that protrudes from the lower surface of the anti-rotation main body portion and is locked in the locking hole, A side locking projection projecting from the side surface of the anti-rotation main body, a support member projecting from the upper surface of the upper fixing member,
An engaging recess that is provided on the support member and engages with the side surface locking projection to prevent the upper fixing member from rotating and allows the upper fixing member to move in the vertical direction;
It said tension adjusting means, said support member extending above the rotation preventing body portion are projected on the upper surface of the upper fixing member, vertically screwed to the support member above the rotation preventing body portion A screw main body that is movable in a direction and has a lower end abutting on an upper surface of the anti-rotation main body and moving the upper fixing member in the vertical direction via the support member. The cable pulling device according to claim 1, wherein the cable pulling device is configured to adjust a tension of the anti-slip member via the upper fixing member by moving a portion in a vertical direction.