UNFAIR ACTION CHECKING METHOD, UNFAIR ACTION CHECKING DEVICE, AND UNFAIR ACTION PREVENTION DEVICE

摘要

PROBLEM TO BE SOLVED: To prevent unfair actions using a forged card without increasing hall staffs or monitor facilities, and without using a prepaid card difficult to forge. ;SOLUTION: Integrated values of the number of supply balls and failed balls are continuously read until an integrated value of the number of supply balls reaches 250 (S1 to S3), at this time, whether the integrated value of failed balls is higher or lower than the permitted number of 220 is determined. When the number of failed balls is less than 220 two times sequentially, it is determined that an unfair action is committed on supply balls (S4 to S1). Unfair action information is outputted (S12), a prepaid card is locked to prevent it from being discharged from the insertion port even if a return button is pressed, and supply ball information is stopped to output (S13) to prevent balls from being supplied even if the supply button is pressed.;COPYRIGHT: (C)1999,JPO