| 摘要 |
PURPOSE:To reduce both occurrence of noise and tractive resistance by providing a pair of unbalancers mounted on rotating shafts side by side in a specific state so as to make the respective rotating shafts parallel in a posture in the horizontal direction. CONSTITUTION:A pair of unbalancers 33 mounted on rotating shafts 31 and 32 are provided side by side so as to be parallel in a posture in the horizontal direction. The pair of unbalancers 33 and 33 are synchronously rotated in mutual opposite directions by driving of an input shaft 35 and actuated so as to mutually compensate centrifugal force in the left and right directions. Thereby, vibration for synchronously moving a frame unit 30 is generated in the vertical direction. |
