Device for moving a load vertically, including an endless drive unit placed in a duct

摘要

An endless belt (2) with drive teeth is located in a continuous channel (10). The upper and lower points on the belt pass round gearwheels (3,4), one of which is attached to the drive motor (8). A slot (11) in the channel allows the load platform (1) to be attached (5) to the belt. The dimension of the channel and belt are such that there is no lateral degree of freedom on the belt. Thus if the belt should break it cannot deform within the channel and will remain in position.