| 摘要 |
<p>PROBLEM TO BE SOLVED: To insert a communicating cable into a sheath pipe precisely and easily with providing a laying pipe with low weight and enough strength, by previously laying the sheath pipe axially of a thick wall part of a deflection hollow pipe. SOLUTION: A deflection hollow pipe 1 has a hollow hole 2 through which waterworks, sewer, or others flow, and an outer peripheral wall 3 around the hollow hole 2 consists of a thick wall part 3a and a thin wall part 3b. Cable insertion sheath pipes 4 are laid in parallel with a given interval axially of a thick wall part 3a of a deflection hollow pipe 1. A communicating cable 5 is inserted into a sheath pipe 4. A full length sheath pipe 4 assembly is provided by connecting an engaging hole which has inner diameter same as outer diameter of the sheath pipe 4 with the end of the sheath pipe 4 at a socket 6 and a spigot 7 of the deflection hollow pipe 1. Therefore, strength of the outer wall can be improved, and the communicating cable 5 is inserted smoothly and stably.</p> |
