| 摘要 |
PROBLEM TO BE SOLVED: To provide a luminaire which suppresses protrusion from a tunnel wall surface in an installed state by achieving reduction in thickness, and which makes maintenance work such as component replacement easy.SOLUTION: A luminaire includes: a body frame 25 whose cross section orthogonal to the longitudinal direction has a U-shape, and which is framed in a square shape and fixed on a tunnel wall surface 13 with the U-shaped opening side facing inward; a sheet frame 27 which is framed in a square shape and fitted to the inside of the body frame 25 to be fixed; a translucent flame-proof sheet 29 which is stretched in a planar manner by an outer peripheral edge part 59 being fixed at the sheet frame 27, which is sandwiched with the body frame 25 and which closes one frame opening surface 65 of the body frame 25; a light source frame 31 which is mounted detachably on the inside of the sheet frame 27 from the other frame opening surface 69 of the body frame 25, and which includes an LED 77; and a back plate 33 which is mounted on the light source frame 31 and closes the other frame opening surface 69 of the body frame 25, and which seals a light source accommodation space 91 on the inner side of the body frame by the body frame 25 and the flame-proof sheet 29. |
