| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an assembled conduit pass test rod whose length can be adjusted easily, before it is inserted into a conduit according to obstructions, such as projections at the bent parts and joint parts of the conduit and which can decide accurately the damages to the surface of a cable laid in the conduit by the obstacles such as protrusions in the conduit. SOLUTION: The cylindrical test rod main part of this assembled conduit pass test rod is divided into a plurality of unit test rods having prescribed unit lengths. After the unit test rods are connected to each other, a through-bolt consisting of an eye bolt and eye nuts are attached to obtain a required length. By using such a constitution, the test rod can quickly cope with conditions such as curvatures, etc. of the conduit.</p> |
