| 摘要 |
PROBLEM TO BE SOLVED: To detect the fact that a catcher has reached a free gift by using a simpler configuration. SOLUTION: A sensor pulley 112 rotates together with moving at winding/ rewinding of a wire 111, and a sensor disc 120 and a transparent photo interrupter 122 detect the rotation of the sensor pulley 112. If the catcher fully drops down and reaches the free gift, the drop of the catcher is slowed, and the moving of the wire 111 is reduced and the number of rotations of the sensor pulley 112 is also reduced. Accordingly, if rotation changes which are exceeding predetermined thresholds are detected by the sensor disc 120 and the photo interrupter 122, it is determined that the catcher has reached the free gift. COPYRIGHT: (C)2004,JPO
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