| 摘要 |
<P>PROBLEM TO BE SOLVED: To minimize, even if a fraud to game balls is performed, damages by the fraud in a game machine for performing a game by circulating a fixed number of game balls. <P>SOLUTION: An RF tag 70 is provided on each of game balls used in a sealed game machine, identification information is written to the RF tag 70 by an RF tag writer 39w, and RF tag readers 11ar, 11br, 19r are provided on start winning pockets and normal symbol operation gates. The identification information is read from the game balls, and the winning or passing frequency thereof is cummulatively stored in association with each game ball. An appropriate value calculated from the cummulatively stored data for all game balls is set as a threshold, and the threshold is compared with cumulatively stored data for individual game balls, and when a game ball out of the threshold is present, out-of-threshold processing is executed as a fraudulent game ball. <P>COPYRIGHT: (C)2013,JPO&INPIT |
