| 摘要 |
PURPOSE:To reduce the accuracy difference of an original stopping position by arranging two pairs of gear trains having different gear ratio between a driving shaft of a carrying belt and a driving means and engaging/disengaging the two pairs of gear strings by clatches. CONSTITUTION:The gears 31, 32, electromagnetic clatches 33, 34, and electromagnetic brake 35 are engaged with the driving shaft 28 of the carrying belt respectively, the respective gears 31, 32 are supported pivotally around the driving shaft 28 so as to be allowed to rotate relatively and the electromagnetic clatches 33, 34 can be rotated unitedly with the driving shaft 28 through driving pins 36, 37 set up on the driving shaft 28 respectively. The gears 41, 42 unitedly connected to a driving motor 40 are meshed with the gears 31, 32 and driving torque by the driving motor 40 is transmitted from the gear 41 to the gear 31 and from the gear 42 to the gear 32. Said constitution makes it possible to reduce the accuracy difference of an original stopping position. |
