| 摘要 |
A training idler (10) for guiding a travelling conveyor belt so that the bel t follows a central path, the training idler (10) comprising: support means adapted to be mounted to a conveyor support frame; a steering roller (12) rotatably mounted on the support means and adapted to be aligned generally transverse to a conveyor belt which will rid e thereon; pivot means connecting the roller to the support means, said pivot means defining a generally perpendicular pivot axis (24) about which the steering roller (12) is able to pivot; said steering roller (12) having an outer peripheral surface of generally right circular cylindrical form and having a central region (20) and opposite edge regions (22), said edge regions (22) having a peripheral circumference which is either greater than or less than the peripheral circumference of the central region (20); the arrangement being such that, in use, as a conveyor belt riding on said steering roller (12) moves towards one or other edge region (22), the difference in the peripheral speeds of the central region (20) and that edge region (20) will cause the steering roller (12) to pivot on the pivot axis (24) and steer the belt back to a central position.
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