An upper conveyor deck includes a plurality of belts each supported by an upstream end pulley and a downstream end pulley which belts are configured to be driven along a closed path having an interior such that a lower run of each of the belts travels in a downstream direction and an upper run of the each of the belt travels in an upstream direction. A first diversion pulley in the interior of at least one of the belts contacts the lower run of that belt, and a diversion guide outside the interior of the belt contacts the belt downstream from the first diversion pulley. A deflecting device at the first diversion pulley is configured to prevent scrap material from becoming pinched between the belt and the first diversion pulley.

A correction mechanism of the belt conveyor device, including a pair of inclined bearings and a pair of main-body guides, corrects meanders of a belt. The pair of inclined bearings include a pair of bearing portions, respectively, and a pair of inclined portions, respectively, that are inclined symmetrically with respect to an axial direction of the rollers. The pair of main-body guides are put into contact with the pair of inclined portions, respectively, and make an end side of the rollers in the axial direction moved in a direction perpendicular to the axial direction, together with the pair of inclined bearings during meandering of the belt. The pair of inclined bearings are fittable to and removable from a shaft portion of one of the rollers.