초록 ▼

A roller conveyor includes a belt of parallel free rollers interconnecting endless conveyor chains which move along a conveyor path. At least certain ones of the rollers carry encircling O-rings engageable with traction shoes for effecting rotation of the rollers. A given roller may carry more than

A roller conveyor includes a belt of parallel free rollers interconnecting endless conveyor chains which move along a conveyor path. At least certain ones of the rollers carry encircling O-rings engageable with traction shoes for effecting rotation of the rollers. A given roller may carry more than one O-ring of different cross-sectional thicknesses, and the roller may be provided with recesses in which the O-rings are seated. The O-rings and traction means can be arranged in various configurations for effecting rotation of different groups of rollers, for effecting rotation in opposite directions, and for effecting rotation at varying speeds.

대표청구항 ▼

In a roller conveyor including a pair of spaced-apart endless conveyor chains movable along parallel conveyor paths, and a plurality of rollers having axes extending perpendicular to the chains and spaced apart longitudinally thereof with each roller interconnecting said chains and being freely rota

In a roller conveyor including a pair of spaced-apart endless conveyor chains movable along parallel conveyor paths, and a plurality of rollers having axes extending perpendicular to the chains and spaced apart longitudinally thereof with each roller interconnecting said chains and being freely rotatable about its axis, apparatus for controlling the effective conveyor speed without changing the speed of movement of the conveyor chains comprising: a plurality of resilient rings, each of said resilient rings extending circumferentially around an associated one of said rollers coaxially therewith and in firm engagement therewith in positions spaced apart laterally of the conveyor, and a plurality of traction means selectively frictionally engageable with said rings, each of said traction means being positioned for engagement with only a single ring on any one roller to cause the roller associated with each said ring to rotate about its axis in response to movement of the conveyor chains along the conveyor paths.