| 摘要 |
PURPOSE:To permit the high or low speed drive in one direction by the selection-control for a motor by transmitting a turning moment onto a high speed output pulley through a unidirectional clutch when a normal/reverse revolution motor is in the normal direction revolution and changing the direction of revolution after the turning moment is transmitted to a low speed output pulley when the motor is in reverse revolution. CONSTITUTION:When a normal/reverse revolution motor M1 revolves in the normal direction shown by the arrow (a), a turning moment is transmitted to a pulley shaft 34a from a belt 38, and a turning moment is applied onto the input gear 41 of a transport system 14 through a gear 40 fixed onto the shaft 34a, and an input pulley 45 coaxial with the gear 41 revolves, and the transport system 14 is driven at a high speed. When the motor M1 revolves in the reverse direction shown by the arrow (b), a turning moment is transmitted from the belt 38 to a pulley shaft 35a, and a gear 43 fixed onto the shaft 35a is revolved. The turning moment of this gear 43 changes the direction of revolution through an idle gear 44, and is applied onto the gear 41, and revolves a pulley 45. Therefore, the transport system 14 is driven at a low speed in the same direction to that of the high speed drive. Therefore, the transport system 14 can be driven at a high or low speed by only selecting the direction of revolution of the motor M1.
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