| 摘要 |
PROBLEM TO BE SOLVED: To carry out closing motion without stopping once in a closing motion process by connecting a closing control circuit and full closing control circuit in parallel, and detecting an electrification variation of the full closing position detection switch, and thereby implementing closing control from the full closing position. SOLUTION: A full close front position detecting switch SD to open by detecting the shutter curtain of an electric shutter coming to a closed position in just front of the full close position is wired to a close control circuit 13. The full close control circuit 20 is connected parallel to the full close front position detecting switch SD. In addition, electrification condition detecting means 18 is furnished for detecting the variation of electrification conditions with opening of the full close detecting switch SD. When the electrification detecting means 18 is in a state of detection, close control is effected from the full close front position of the shutter curtain. By construction in this way, close control is implemented with obstacle detection to the full close front position, and close operation is carried out in a state having no obstacle detection subsequent thereto, so that there is no once stop at the full close front position. |
