Patent ID: 6772874
Filing Date: 2004-08-10
Classification: B65G

Abstract:
A roller conveyor comprising:a pair of conveyor frames; a plurality of rollers which are rotatably mounted between said pair of conveyor frames; rotation driving means for driving a roller or a set of rollers in said plurality of rollers to convey materials, the roller or said set of rollers being able to be transformed to a free roller or rollers which are rotatable in either direction by an external force when said rotation driving means stop; wherein said roller comprises a roller body which is rotatably mounted to a stationary roller shaft, and a driving force receiver which receives a rotational force by the rotation driving means, said roller conveyor further comprising driving force transmitting means for transmitting the rotational force to said roller body only when the driving force receiver receives the rotational force; wherein said driving force transmitting means comprises a mover which moves axially of said roller by the rotational force from said driving force receiver, and a receiver connected to the roller body to rotate the roller body by motion of said mover; and said mover has a mover pin projected perpendicular to an axis of the roller, said receiver having a receiver pin perpendicular to the axis of the roller, said receiver being driven by said mover by engagement of the mover pin with the receiver pin.