| 摘要 |
<p>PROBLEM TO BE SOLVED: To make extremely easy an operation when a rail for swing prevention is installed on each metal square tubular column, provides an excellent work efficiency, and also assures a locking action. SOLUTION: A rail inserting side open port part 6 and a rail pulling side opening part 7 having fitting grooves 4 and 5 for fitting a swing preventing rail 2 into two surfaces opposed to each other on both sides of a hollow part 3 of a metal square tubular column body 1. A locking piece 9 is installed projectedly at the opening part one side edge 8 of the rail inserting side opening part 6 in the style of a single swing door, and the locking piece 9 is always bent open, in semi-open status, to the hollow part 3 side of the metal square tubular column 1 with the open part one side edge 8 used as a bent open part, and formed openable by elastic deformation from the semi-open state.</p> |
