| 摘要 |
PROBLEM TO BE SOLVED: To supply power to a keyless door locking/unlocking device of a vending machine to lock or unlock a door even at the time of power supply failure from a commercial power source to the vending machine. SOLUTION: The keyless door locking/unlocking device 6 to which power is supplied from the commercial power source and which locks and unlocks a door 3, a light reception part 8 which receives a signal from the outside to output a locking/unlocking signal to the keyless door locking/unlocking device 6, and a connector 17 for an external power source 41 which supplies power to the keyless door locking/unlocking device 6 at the time of power supply failure from the commercial power source to a vending machine 1 are provided; and when power supply to the vending machine 1 fails, the external power source is connected to the connector 17 and power is supplied to the keyless door locking/unlocking device 6 to lock or unlock the door.
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