| 摘要 |
PROBLEM TO BE SOLVED: To restrict generation of warping at the end longitudinally of a luminaire main body and improve appearance in a ceiling-attached state by providing a deformation shutdown means made of one opening at the plate end side between an end plate and a luminaire mounting hole. SOLUTION: An assembled liminaire main body is inserted beneath a luminaire recessed opening of a ceiling E with a top plate 33 upward. With this insertion, the lower end of two suspension bolts 57 are inserted into a luminaire mounting hole 56 of a plate 33, respectively, upwardly. In this case, the recessed depth of the luminaire main body is restricted by abutting of expansions 35 and 48 at the lower edge of the main body on the edge lower face beneath the opening. Then, a washer 58 and a nut 59 are spirally fitted to the bolt 57 and are tightened. Such mounting excessively tightens the nut 59 so as to closely contact with edges 53 and 48 beneath the opening, and the longitudinal end of the plate 33 is formed. However, a top plate end side part 33a between a hole 56 and an end plate 32 are provided with an opening 60 and the strength of the part 33a is degraded more than the other part. Thereby, deformation to the plate 32 due to tightening is prevented. |
