Load lifting system e.g. for erecting agricultural building has upright surrounded by load supporting guide with drive assembly

摘要

The system consists of a vertical upright (3) surrounded by a guide (4) that supports the load to be moved and is equipped with a drive assembly (5) engaging with a vertical rack (6) on the uprights and incorporating a reduction gear (7), input and output shafts and a sprocket driving a chain (11) with teeth (12) that engage with the rack. The system also has at least one guide roller (14) that presses against the opposite side of the upright to the rack.