| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure for mounting a luminaire for a clean room, the structure allowing easy maintenance of the luminaire (replacement of illuminating lamps and the luminaire as a whole, cleaning and repair inside a luminaire body, etc.), preventing uncleaned air from entering into the room. SOLUTION: A ceiling material 1 is made of a thick panel, having such a strength that persons can perform operations standing thereon. Locking bolts 13 are fastened into the internal threads of projecting parts 3b to fix supporting frames 3 via sealants S1 inside an opening 1a formed in the ceiling material 1. A translucent cover 7 is placed on the lower horizontal pieces 3a of the support frames 3 via sealants S2. The flange parts 5d of a main body box 5A are placed on the box support pieces 3c of the supporting frames 3, whereby a luminaire 5 is placed via sealants S3.
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