| 摘要 |
PROBLEM TO BE SOLVED: To exactly detect an unfair opening of a front surface door. SOLUTION: A door switch 54 is turned on at the time of closing a front surface door 7 and is turned off at the time of opening the door 7 and is connected with a host computer. The host computer totalizes the number of times for pattern fluctuation. Driving power supply is imparted to the door switch 54 from the host computer. In this constitution, an unfair opening of the front surface door 7 is exactly detected because the front surface door 7 can be monitored by the door switch 54 even at midnight where business of a Pachinko hall is terminated.
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