| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a means which can surely and quickly mesh a plurality of switch gears with their corresponding transmission gears, respectively. Ž<P>SOLUTION: A driving force of a motor 65 is transmitted to the switch gear 71, and a driving force of a motor 66 is transmitted to the switch gear 72. The switch gear 71 can mesh with the transmission gears 171 and 172, and the switch gear 72 can mesh with the transmission gear 173. Driving transmission of the switch gears is switched when the position of each switch gear is changed. When switching of driving transmission, the motors 65 and 66 are rotated by a predetermined rotation amount (rotation amount corresponding to one tooth of the transmission gear). The motors 65 and 66 are controlled to drive so that the other motor 65 is started while at least one motor 66 drives. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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