Supporting roller, in particular for belt conveyors or the like

摘要

The supporting roller (50), in particular for a belt conveyor or the like, has a cylindrical casing (52) which is supported on a shaft (62) via bearings (58). A protective cover (66) is arranged on the outer surface of the casing (52). The protective cover (66) is designed in the form of a flexible tube and is connected, in particular bonded, by its ends (68) in an air-tight manner to the roller casing (52). By way of a small tube which is guided into the space (80) between the roller casing (52) and the protective cover (66) and is closed with a valve (78), the space (80) can be expanded so that the protective cover is continuously subject to a milling procedure during running and caking-on of material is in particular prevented. <IMAGE>