Lifting device for a packing machine

摘要

The lifting device (1) has two drive shafts (3) which are arranged in parallel. The two toggle levers (4) are arranged on the drive shafts for vertically moving in common tool lower portion. The drive shafts are provided with the servomotors (10) which are synchronized with each other. The drive shafts are rotated in opposite directions of rotation. The brakes (18) are provided on the drive shafts or at the servomotors. The rotary encoders (23) are provided for detecting angles of rotation in the servomotors or at the drive shafts.