| 摘要 |
<p>The present invention relates to a conveyor belt alignment system by which a pair of alignment rollers (34) are mounted on a carrier frame (30) about a pivot axis (40) that is situated at the approximate transverse centre between opposed longitudinal side edges (23) of a conveyor belt (18). The alignment rollers (34) are spaced longitudinally to accept and form a portion of the conveyor belt (18) into a substantially s-shaped configuration. The centrally pivoted carrier frame (30) and alignment rollers (34) are pivoted by a pair of bladders (50,51). Inflation of the bladders (50,51) is controlled through a sensor (54) provided to detect the transverse position of an adjacent belt edge (23). If the belt edge (23) shifts in one direction, the sensor (54) detects such motion and operates the drive to selectively inflate one or the other of the air bladders (50,51) to correspondingly shift the belt aligning rollers (34). The misaligned belt (18) is brought back to the desired tracking configuration where the sensor (54) detects the desired orientation and permits the system to return to a normal, desired operating mode. <IMAGE></p> |
