| 摘要 |
PROBLEM TO BE SOLVED: To provide a shutter device which can adequately close a shutter curtain at the occurrence of a fire regardless of a manual or automatic type and without requiring manual operation or input from outside.SOLUTION: A winding mechanism includes: a shaft which is unrotatably installed to extend over the width direction of an opening part; rotation means which freely rotates around the shaft as a center of rotation and winds a shutter curtain by rotation in a winding direction; and energizing means which is connected between the shaft and the rotation means and adds an energizing force to the rotation means in the winding direction opening the opening part in accordance with the rotation of the rotation means in a delivery direction. The energizing force in the winding direction added by the energizing means is released by melting of connection means installed at a position capable of releasing the energizing force. |
