| 摘要 |
Palletizing apparatus includes a pallet loading chamber with a pallet lift or elevator having a trunnion mounted ball nut assembly which receives a drive screw driven by an electric motor. The pallet lift and ball nut are confined against rotational motion by spaced opposed guide tracks which engage guide rollers on the lift. The drive screw motor is controlled by a digital pulse counter which is coupled to a sensor which senses screw revolutions. The pulse counter can be programmed to move the lift upward or downward a pre-selected distance such as the height of the layer of cartons. The apparatus also includes a retractable apron which is movable between an advanced position over the pallet loading chamber and a retracted position free of the loading bin by a motor driven screw and a ball nut assembly on the apron. A pallet magazine for supplying pallets to the pallet loading chamber has cam operated elevating fingers for separating the lower pallet from a vertical pallet stack and a sweep bar for moving the lower pallet into the loading chamber. The apparatus also includes a conveyor assembly with a pivoted conveyor extension and a cross conveyor at the end of the extension to afford positioning of two loaded pallets for access by fork lift trucks.
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