| 摘要 |
<p>PURPOSE:To reliably lay a cable in the upper part internal surface of a buried pipe by providing a weight for positioning cable guide rollers, provided in the lower part of a cable laying device main unit, always in the upper part of the buried pipe. CONSTITUTION:A cable 2 is inserted into a buried pipe 1. Next, a tube-shaped liner member 3 is inserted into one end of the buried pipe 1 and inverted by supplying water into the liner member 3. When a cable laying device main unit 4 is moved, the cable 2 in the buried pipe 1 is picked up by cable guide rollers 6 and closely attached in a direction of the axis to upper part internal surfaces of the buried pipe 1. Here the cable guide roller 6 always runs along the upper part internal surfaces of the buried pipe 1 by action of a weight 8. Next, the linear member 3 is cured by heating water therein. In this way, the cable 2 is reliably laid in the upper part internal surface of the buried pipe 1 in the direction of its axis.</p> |
