Abstract: In a palletizing machine, cases of goods are received from a production line and are arranged into patterned layers. The palletizing machine stacks the patterned layers one on top of another to form a stacked load that can be easily transported by machine. During arrangement of the cases into the patterned layers, some cases may need to be turned to change their orientation relative to their direction of travel. The cases can be turned simultaneously in groups of two, three, or more cases, to minimize the contact of the palletizing machine with the cases during turning. The turning device which bears against the case during turning may also be provided with a component of movement in the direction of case travel so as to effect the speed of the collision when the cases contact the turning device and effect the net speed between the cases and the turning device during turning.

Abstract: The invention provides a hoist drive system for controlling the position of a hoist platform in a palletizer. In an embodiment of the invention, a hoist drive system comprises two electrical motors with dual output shafts. One motor has an encoder and as one motor rotates clockwise, the other motor rotates counter clockwise. A common shaft with a spring set safety break ties the motors together. The two motors are tied together electronically with a flux vector motor controller with input from the encoder. The flux vector motor controller controls the operation of the two motors, which drive two gearboxes, thereby enabling vertical displacement of a hoist platform coupled to the drive system.