| 摘要 |
PROBLEM TO BE SOLVED: To provide a safety device realizing a safety function, that an output changeover switch cannot be manipulated if a power supply input switch of a power supply device is in an OFF-state, with a simple structure and attached to the power supply device at a low cost. SOLUTION: This power supply device 1 has a power supply, a power supply circuit 2, a power supply input switch 5 provided between the power supply and the power supply circuit 2, a plurality of motors driven by powers supplied from the power supply circuit 2, and an output changeover switch 4 which is provided between the power supply circuit 2 and the plurality of motors and used for driving one or more motors among the plurality of motors. There is provided a locking mechanism which locks the output changeover switch 4 according to the existence of the output of the power supply circuit 2. The locking mechanism is released only when the power supply input switch 5 is in an OFF-state to permit the manipulation of the output changeover switch 4, and comprises a drive unit 3 operated by ONs/OFFs of a solenoid 6 in the power supply circuit 2 and a lock unit 8 which covers the output changeover switch 4 provided on a tip of a drive shaft 7 of the drive unit 3. |
