| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem where abnormality of a sensor for detecting the movement of a game ball may affect a performance of a game machine in a Pachinko game machine offering the performance corresponding to the movement of the game ball. SOLUTION: The Pachinko game machine 10 includes: a plurality of light-receiving devices 72 which detect the presence/absence of game balls in respective areas charged thereby within a monitoring object region, for acquiring the positions of the game balls moving in a predetermined monitoring object region, and which output detection signals indicating the detection results; a position determination means 154 for determining the position of each game ball based on the detection signal acquired from each of the plurality of light-receiving devices 72; a performance display control means 144 for making a performance display device 60 display information according to the position of the game ball; an abnormality determination means 148 executing a determination on whether the detection signals from the light-receiving devices 72 include an abnormal value or not in a predetermined period when no game ball is supposed to be present in the monitoring object region; and an abnormality notification means 152 adapted to report it to the outside when determining that the detection signal shows an abnormal value. COPYRIGHT: (C)2010,JPO&INPIT
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