| 摘要 |
PROBLEM TO BE SOLVED: To provide a game stand capable of accurately finding the fraudulence such as shooting at a jackpot by the fraudulent operation of an operation switch at specific timing. SOLUTION: When a start lever is pushed down as a game is started, a light shading part 261, by which a first start lever sensor 241 is turned off, is moved upward to turn the first start lever sensor 241 on. The period from when the first start lever sensor 241 is turned on till when a second start lever sensor 242 is turned off by the light shading part 261 is measured as the operation time t, and the operation time t is stored one after another as the history of operation. The average of the operation time equivalent to 30 rounds of the game including the current round is computed as the reference operation time X, and the number B of abnormal operation in the history of operation in which the operation time t included in the range of reference operation time with the tolerance±A added to the reference operation time X is computed. If the number B of abnormal operation in the history of operation reaches a fraudulent determining reference number C, it is determined that fraudulent operation such as fraudulent operation of a solenoid is performed. COPYRIGHT: (C)2007,JPO&INPIT
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