| 摘要 |
PROBLEM TO BE SOLVED: To enable excellent drawing around of distributing wires led into a room from a ceiling side by causing a horizontal member arranged near a ceiling planet to have a wire guiding function and an optional member fitting function. SOLUTION: A horizontal member 3 is composed of a first frame material 6 whose upper part is open, and a second frame member 7 whose lower part is open. They are fixed by welding, etc., the top wall 71 of the second member 7 to the bottom wall 63 of the first member 6, and divide a wire guiding function and an optional member fitting function. On the occasion of uniting the horizontal member 3 to struts 2, the right and left end parts of the first member 6 are inserted into the cutouts 23a of joint portions 23, and hooking claws 77 are booked to the internal side surfaces of the struts 2 through the cutouts 23a. Bolt holes formed in the horizontal wall 25b of a bracket 25 and bolt holes formed in the bottom wall 63 of the first member 6 and the top wall 71 of the second member 7 are tightened and linked with bolts, and the horizontal member 3 is united to the joint portions 23. Incidentally, the wire guiding spaces S4 of horizontal members 3 are connected by cutouts 23a. |
