| 摘要 |
PROBLEM TO BE SOLVED: To provide a winding shaft protection structure of a shutter device, which enables maintenance work for a winding shaft to be easily performed because the whole protective sheet can be easily detached from the winding shaft.SOLUTION: An entire perimeter of a rotor 12 of a winding shaft 10, to which an end of a shutter curtain is to be connected, is covered with a protective sheet 21. The protective sheet 21 is wound around an outer periphery of the rotor 12 from one end 21A of the protective sheet 21 in the circumferential direction of the rotor 12, and the other end 21B is positioned over the one end 21A. Thus, the protective sheet 21 is wound at least once around the outer periphery of the rotor 12 with a circumferential overlapping margin C of the rotor 12. The protective sheet 21 is fixed to the rotor 12 by a countersunk screw 31 serving as a removable fixture. |
