| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a game machine which can prevent a fraudulent act against a game control board and with which performance of a fraudulent act can be easily and surely identified when the fraudulent act has been committed. <P>SOLUTION: A second projection part 244 of a board case 214 is provided with a claw member 248. The claw member 248 is engaged with a nut member 250 that tries to rotate in one direction of rotation to prevent the nut member 250 from rotating and lock the nut member 250. Therefore, by rotating a bolt member 218 in one direction of rotation, the nut member 250 and the bolt member 218 are allowed to rotate relative to each other, which increases a degree of screwing between the two members. On the other hand, the claw member 248 is not engaged with the nut member that tries to rotate in the other direction of rotation, allowing the nut member 250 to rotate. Therefore, when the bolt member 218 is tried to be rotated in the other direction of rotation, the nut member 250 and the bolt member 218 rotate together in the other direction of rotation and the screwed state between the two members is not canceled. <P>COPYRIGHT: (C)2012,JPO&INPIT |
