| 摘要 |
PROBLEM TO BE SOLVED: To provide a fraud prevention device positively detecting a fraud such as intentionally hitting a game machine and preventing the issuance of erroneous warning in maintenance work. SOLUTION: This fraud prevention device is provided with a door opening detector 45 detecting the opening of a glass door, a vibration detector 51 detecting vibration applied to the game machine, a determination means 57 determining whether the vibration applied to the game machine is a prescribed threshold or more based on a signal input from the vibration detector 51, and a warning signal output means 58 outputting a warning signal when the determination means determines it as the threshold or more; and is so constituted that, when the door opening detector 45 detects the opening of the glass door, a control means 36 invalidates a signal input from the vibration detector 51 to the determination means 57. COPYRIGHT: (C)2007,JPO&INPIT
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