| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine which can detect occurrence of ball clogging in the internal area of a variable prize-winning device unit. SOLUTION: The game machine (pachinko machine) 10 is equipped with: an opening/closing control means to perform switching control of switching to an open state in which a game ball can enter the internal area of the variable prize-winning device unit provided in a game area and a close state in which the game ball cannot enter there; an entering ball detection means for detecting the game ball which enters the internal area; an ejection detection means for detecting the game ball ejected from the internal area; and a residual ball monitoring means for deciding whether the game ball is present in the internal area on the basis of detection by the entering ball detection means and detection by the ejection detection means. When the residual ball monitoring means decides that the game ball is present, an invalid state where switching control by the opening/closing control means is not permitted is generated. When the residual ball monitoring means decides that the game ball is not present, a valid state where switching control is permitted is generated. The game machine 10 is also equipped with a switching condition storage means for storing that a power source is interrupted during switching control by the opening/closing control means. COPYRIGHT: (C)2007,JPO&INPIT
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