| 摘要 |
PROBLEM TO BE SOLVED: To surely prevent a fraud without impairing the function of a variable winning device in a game machine such as a Pachinko game machine having the variable winning device. SOLUTION: A game board 3 of a Pachinko machine includes an operation hole 12, a symbol display device 13, the variable winning device 21 having a large winning hole 16, and the like. A control device 50 produces a big win state when filling a requirement for satisfying a predetermined condition. In the big win, a large winning hole solenoid 23 tilts a shutter 22, so that the large winning hole 16 takes an open state or a closed state. This game machine is also provided with a retention means, when the shutter 22 is in a vertical state, retaining the shutter 22 in the vertical state against a force fraudulently tilting the shutter, and is configured to invalidate the retention function by the retention means when actuating the large winning hole solenoid 23. COPYRIGHT: (C)2009,JPO&INPIT
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