Patent ID: 8376128

Claim:
A roller for a belt conveyer, which includes a plurality of rollers provided on an upper portion thereof in order to rotate a rubber belt, the roller comprising: a roller tube having an engraved groove therein, the groove indicating a degree to which a surface of the roller is abraded; a shaft reinforcement member provided in one end of the roller tube, wherein the shaft reinforcement member is connected to a shaft disposed inside the roller tube, and is rotatably coupled to the belt conveyor; a dustproof cover closing one end of the roller tube, wherein the shaft reinforcement member extends through the dustproof cover; a bearing housing fitted into the dustproof cover, with a bearing thereof being rotatably coupled to an outer circumference of the shaft reinforcement member; a flat spring fitted into the bearing housing, wherein the flat spring elastically supports one surface of the bearing, thereby controlling expansion or contraction of the bearing; and an end cap fixedly coupled to an outer surface of the dustproof cover in order to block impurities from entering the roller, wherein the flat spring has an integral elastic protrusion on an outer surface thereof, the elastic protrusion being bent at a predetermined angle such that the elastic protrusion has a predetermined elastic force to control expansion and contraction of the bearing.