| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the force required to draw a wire and/or pipe onto a rack and to reduce the number of sub-beams attached between the main beams of the rack while a required loading strength is secured. SOLUTION: A sub-beam is attached between the main beams of a rack for wiring and piping and composed of a supporter 5 having a support part 5a which is opened upward and a roller 4 which rotates while it is housed in the support part 5a. The supporter 5 supports the roller 4 so as to have the roller 4 protrude partially from the support part 5a.</p> |
