TRACKING ASSEMBLY FOR A CONVEYOR BELT

摘要

A tracking assembly (10) for keeping a conveyor belt (24) centrally aligned includes a sub-frame (12) which is adapted to be mounted to a support frame (16) for the conveyor belt. At least one independently rotatable idler (18, 20) is mounted on the sub-frame, the idler supporting the conveyor belt in position, the idler being aligned generally transverse to the length of the belt. The idler includes a support shaft (28), an outer drum (26) rotatably supported on the shaft and a pivot assembly (34) located within the drum defining a pivot axis (36) about which the drum is pivotable relative to the shaft, the pivot axis being perpendicular to the belt. A contact or control arrangement (38) is provided on at least one side of the idler which will be contacted via an edge region of a conveyor belt which has travelled from its central position to that one side. When the conveyor contacts the contact means this will cause the drum of the idler to pivot about the pivot axis to a position in which it steers the belt back to its central position.