| 摘要 |
<p>PURPOSE: To provide a guide member for conduit installation which facilitates installation in a narrow space in a man-hole, occupies little space in the hole route of a steel pipe, facilitates the reduction of a friction resistance at the contact part between the hole inner wall surface of the steel pipe and the guide member, and is reasonable in cost. CONSTITUTION: A guide member 1 for conduit installation is composed of a circular-arc-shaped base part 2 whose attaching part 20 which is attached to a pipe has a curvature smaller than the curvature of the pipe and rotary units 3 which protrude from the outer circumferential surface of the base part 2 on the outer circumferential surface side and are held so as to be able to rotate and are brought into rotary contact with the inner wall surface of a protective outer pipe.</p> |
