| 摘要 |
A castor particularly for trolleys comprises a rolling body supported rotatably by a fork mounted in a support destined to be connected to a trolley. The rolling body comprises: a central body and at least two circular flanges protruding radially from the central body and having a thickness smaller than the width of longitudinal grooves defined between longitudinal ridges of a conveyor belt for trolleys. The central body of the castor comprises at least one facet defining a flat surface. When the edges of the circular flanges are received within longitudinal grooves of the conveyor belt, the facet of the central body abuts against the upper surface of the longitudinal ridges of the conveyor belt to block rotation of the castor body.
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