| 摘要 |
PROBLEM TO BE SOLVED: To provide a mounting structure of optional members which may be easily attached and detached according to purposes and need by effectively utilizing leg structures for mounting chairs when the optional members are attachably and detachably mounted to horizontal members for supporting the chains by constituting the leg structures of a temporary stand. SOLUTION: The mounting structures of the optional members OP include insertion parts 31 which insertably and removably insert the horizontal members 6 in their longitudinal direction in such a manner that their optional members OP may be slid and moved only along the longitudinal direction of the horizontal members 6 and fixing means 8 which insert the horizontal members 6 into the insertion parts 31 and fix the optional members OP to the prescribed positions of the horizontal members 6.
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