| 摘要 |
PROBLEM TO BE SOLVED: To provide a winch device improved in safety by applying an electric brake to a motor to prevent an abrupt fall of a towed object when a mechanical lock mechanism is broken. SOLUTION: In a state that the motor is stopped, the lock mechanism is in a locking state (Step S1). When the lock mechanism is in the locking state, a control part detects whether the motor is rotated or not. When the lock mechanism is broken, for example, a wheelchair is stopped on the way of a slope, the wheelchair is moved down with its dead weight to force a belt to be drawn out of a drum. By the rotation of the drum, pulses are outputted from a rotation sensor to detect the rotation of the motor. When the motor is rotated, the electric brake is applied to the motor (Step S3) to stop the motor while issuing a warning from a buzzer or a lamp (Step S4). COPYRIGHT: (C)2011,JPO&INPIT
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