A roller chain bears the weight of the material for conveying. The highly wear-resistant plastic slide rail attached to the frame structure guarantees low-friction, low-noise running. The conveyor is driven by a continuous shaft with a geared motor. The individual sections of the chain are tensioned separately. Reversing operation is possible. Small chain deflectors on roller bearings allow common loading aids to be transported longitudinally or transversely without changing track. Grouping is effected by clocked operation or bunching of the material for conveying.