| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a cable-passing construction method, in which a cable being laid is passed through a main conduct and a branch conduit line, whose diameter is smaller than that of the main conduit. SOLUTION: A blower B is connected to the end on the side, on which cable C is laid of the main conduit P. A traction implement T which is molded to be into a hollow spherical shape by an elastic material is connected to the tip of the cable C. The cable C is inserted from the end on the opposite side of the side, connected to the main conduit P of the branch conduit line FP, in such a way that the traction implement T is used as the head. In a state with the end on the opposite side of the side, to which the branch conduit line FP is connected, of the main conduit P being closed, the blower B is driven. The traction implement T is sucked by the blower B. The cable C is passed through the main conduit P from the branch conduit line FP.</p> |
