| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable a cable fixture, etc., to be mounted even if a bottom plate is mounted, by projecting a fixture piece to the topside of one end of a crossbeam by a coupling, and a locking piece to be locked to the topside in the vicinity of the center of the crossbeam, from one side edge of a bottom plate, and projecting another fixture piece and another locking piece in the position symmetrical about points of the other side edge of the bottom plate. SOLUTION: A fixture piece 2 with a coupling 10 to the topside of one end of a crossbeam Q and a locking piece 3 locked to the topside in the vicinity of the center of the cross beam Q are projected from one side edge of a bottom plate 1. Moreover, these fixture piece 2 and the locking piece 3 are projected in the positions symmetrical about points of the other side edge of the bottom plate 1. Accordingly, laying the bottom plates 1 continuously each fixing piece 2 and locking piece 3d is fixed on the crossbeam Q without laying them on adjacent locking piece 2 and locking piece 3. Hereby, even in the case that the bottom plate is mounted, multipurpose members such as a cable fixture, and others can be mounted on the crossbeam.</p> |
