| 摘要 |
PROBLEM TO BE SOLVED: To provide a door apparatus provided with such an illegal unlocking preventing function as preventing unlocking of the front face of a game machine table by a person other than the manager of the game machine. SOLUTION: The apparatus has a vertically movable connection link and a rotation plate rotatable with a fulcrum fixed to a frame as a center, and a long hole making a connection member fixed to the plate movable is formed at the connection link. When a key is operated, the link is moved down to depress the connection member at the upper end part of the long hole and the plate is rotated to separate a plate-like member and a pawl part to be disengaged. When the pawl part is depressed by an illegal tool, since the plate is rotated with the fulcrum as the center and the connection member is moved in a long hole formed in its moving direction, the link is not linked. Consequently, in spite of disengaging one side, engaging of the other side is kept, thereby the door cannot be opened. When the link is depressed by illegal operation, a standing piece is abutted on an engaging protrusion and the connection link cannot move downward with respect to the frame.
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