| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine using screw members, and capable of suppressing cancellation of a fastening by the screw members after assembly work.SOLUTION: A board box of a main control device includes a front side component 101 and a rear side component 102. A cover member 154 is fixed to the rear side component 102 with a fracture screw 170. After the cover member 154 is fixed, by a head 250 of the fracture screw 170 being separated, a shank 255 of the fracture screw 170 becomes impossible to be rotated, and a fixation of the cover member 154 becomes impossible to be cancelled. A cylinder-side ratchet tooth part 353 is provided in a cylindrical part 178 in the cover member 154, and a screw-side ratchet tooth part 355 is provided in a second enlarged diameter part 275b in the fracture screw 170. And, respective ratchet tooth parts 353, 355 are engaged so as to suppress a rotation in a direction loosening the shank 255.SELECTED DRAWING: Figure 32 |
