| 摘要 |
PROBLEM TO BE SOLVED: To prevent a sliding door from being slid at an overspeed when the sliding door is slid by motor power. SOLUTION: When a motor is rotated normally, a clutch mechanism 15 is put in the first connecting state to rotate a wire drum 8 in one direction, and when the motor is rotated in the reverse direction, the clutch mechanism 15 is put in the second connecting state to rotate the wire drum 8 in the other direction. In the first connecting state and in the second connecting state, even if the rotation of the motor is stopped, the first connecting state and the second connecting state are held, and the clutch mechansim 15 is returned to the non- connecting state by a designated amount of reversal of the motor in the first connecting state and by a designated amount of normal rotation of the motor in the second connecting state. The clutch mechanism 15 is not released from the first connecting state and the second connecting state even if the wire drum 8 is manually rotated in the first connecting state and in the second connecting state. |
