| 摘要 |
PROBLEM TO BE SOLVED: To prevent ball biting by dislocating a point on a wall side where ball biting occurs in response to a rotor in the horizontal direction with a cam. SOLUTION: A split wall 15 at a portion along the prize winning port 19 of a peripheral wall 3 and a rotor storage chamber 20 is rotatably fitted to a substrate 2. The split wall 15 and the cam 33 are interlocked so that the split wall 15 can be horizontally moved by the cam 33 rotated together with the rotor 25.
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