| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine 1 capable of promptly and accurately detecting a fraudulent act upon a selector 50.SOLUTION: A game machine 1 comprises a selector 50 including a first put-in medal passage detection sensor 55a and a second put-in medal passage detection sensor 55b that are provided at a predetermined interval along a medal passage 52 where a medal M that is put in from a medal slot 36 passes. In an MPU 61, a total time measuring timer 65 measures a total time from start of a shield state of the first put-in medal passage detection sensor 55a caused by the medal M in timing t1 to end of a shield state of an optical path of the second put-in medal passage detection sensor 55b caused by the medal M after a predetermined number of medals. The measurement of the total time is finished in such timing that a passage interval of preceding and following medals M exceeds a passage reference time. Thus, operation can be promptly shifted to a medal passage discrimination for comparing the total time with the reference time, and the fraudulent act upon the selector 50 can be accurately detected.SELECTED DRAWING: Figure 6 |
