| 摘要 |
PURPOSE:To facilitate attachment of a reflecting plate without using another fitting member and parts control, retain the reflecting plate by fixed holding power, and improve mounting/demounting workability. CONSTITUTION:An apparatus main body 18 provided with a fitting member 37 and a positioning body 22 is fitted in the fitting opening 17 of a ceiling board 16 by an anchor bolt 11. A reflecting plate 28 is inserted in the fitting opening 17 and the knob part 42 of the operating body 38 of the fitting member 37 is inserted through the fitting hole 35 of the reflecting plate 28. The knob part 42 is rotated, and the longitudinal direction of the knob part 43 is made orthogonal to that of the fitting hole 35. A hook part 43 is rotated to be positioned on a second rotary position where the hook part 42 of the longitudinal direction is insertable along the longitudinal direction of the insertion hole 24 of the positioning body 22. By energizing a coil spring 39, the hook part 43 is inserted in the insertion hole 24 to be moved into the coil spring 39 and the operating body 38 moves upward. The reflecting plate 28 together with the knob part 42 is moved upward, and the edge part 32 of the reflecting plate 28 abuts on the edge of the fitting opening 17 to retain the reflecting plate 28 for fitting the plate 28 to the apparatus main body 18. |
