| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent an illegal action of fraudulently opening an opening/closing member, to prevent backlash at the closed position of the opening/closing member, and to prevent the damage and fault of the opening/closing member and its driving mechanism, in a Pachinko game machine provided with a big winning port device having the opening/closing member for opening and closing a big winning port. Ž<P>SOLUTION: A second big winning port device 14 for opening and closing a second big winning port 14a includes a first opening/closing member 21 for performing opening/closing operations around an axis orthogonal to the board surface 4c of a game board 4, a second opening/closing member 22 for performing opening/closing operations around an axis in a direction parallel to the board surface 4c, a driving mechanism 23 for opening and closing the first opening/closing member 21, and a linking mechanism 24 for opening and closing the second opening/closing member 22 linked with the opening/closing operations of the first opening/closing member 21. When the first opening/closing member 22 is positioned at the closed position, the second opening/closing member 22 is positioned at the closed position and guards the first opening/closing member 21. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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