| 摘要 |
PROBLEM TO BE SOLVED: To provide a big winning opening device of a Pachinko game machine capable of accurately detecting a fraud without erroneous detection. SOLUTION: In a big winning opening 3, an open-close door 5 opening and closing by making the first electric actuator 6 operate is pivotally supported so that a game ball 7 on the open-close door is guided into the big winning opening when the open-close door is in an open state, and a sloped bottom surface 9 sloping downward toward a ball entrance 10 is formed inside the big winning opening. A drop opening 12 is provided at an adjacent place of the ball entrance on the sloped bottom surface, and a shutter member 13 is provided in the drop opening 12 so as to move up and down by making the second electric actuator 14 operate. The shutter member is made to move down and the drop opening 12 is covered so as not to impede the game ball from flowing into the ball entrance, and the drop opening is made to open by making the shutter member move up. COPYRIGHT: (C)2009,JPO&INPIT
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