| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide optical cable attachment jigs which can be attached at a low cost, while no treatment is applied to a conduit itself and a cable is fixed to the upper part inside the conduit in order not to obstruct a flow of fluid, can be replaced, are free from local stress concentrations, and have simple structure. SOLUTION: A plurality of first optical cable attachment jigs 1 are bound on an upper surface of an outer covering pipe 5 at positions where center parts of flat springs 11 are brought into contact with the upper surface of the pipe 5, the jig 1 is largely warped and deformed by pressing both ends of sticking plates 12 inward with hands, etc. The pressing force is released in a state that tips of both the sticking plates 12 are positioned inside a holding arm 31 to have the first optical cable attachment jigs 1 held by the holding arm 31 and, if all the first optical cable attachment jigs 1 are temporarily fixed to a truck 3, the truck 3 is transferred to a prescribed position of a drainpipe 4 and both the ends of the sticking plates 12 are released from holding by the holding arm 31. With this release, the first optical cable attachment jigs 1 are powerfully opened by the elastic force of the flat springs 11 and fixed to the inner wall of the drainpipe 4.</p> |
