| 摘要 |
<p>PURPOSE:To enable a wire to be extended in a longer section at a stroke while reducing damages on the wire by using a caterpillar type metal wheel in which wire holding pieces are arranged with fixed spaces on an endless piece fixing member. CONSTITUTION:A caterpillar metal wheel C constitutes a main unit frame 3 connecting a plate material of almost oval or trapezoidal front face to be overlapped with a predetermined space. A rail part 1 is constituted folding the main unit frame 3 in its peripheral edge respectively to the outer side 90 deg. providing a protruding arm serving as a rail 11. Upper and bottom rollers 4, 5 are mounted on both legs of a bed part 6 sliding on the rail part 1. While a piece fixing member 8 is fixedly connected endlessly to an upper side 7 of the bed part 6. Further wire holding pieces 10 are fixed to the outside of the bed part 6 holding the piece fixing member 8. This caterpillar metal wheel C is suspended by the arm point end of each steel tower between wire extension spans. A towing rope, connecting a wire, is pulled through being wound on the caterpillar metal wheel C, and the wire is arranged between the drawn wire spans. By the method thus obtained, the wire is given less damages.</p> |
