Pressing free sammelfoerderer and related a trigger mechanism

摘要

"ZERO PRESSURE ACCUMULATION CONVEYOR ~ TRIGGER ASSEMBLY"Jonathan R. DavisABSTRACT OF THE DISCLOSUREA live roller zero pressure accumulation conveyor andtrigger assembly for sensing the presence or absence of articleson the conveyor are described. The trigger assembly includes acam which is mounted to the conveyor for pivotal movement aboutan axis at or above the axes of rotation of the conveyor rollers,a leg on the cam spaced from the pivotal mounting and extendingupwardly between a pair of the conveyor rollers, and a camroller rotatably mounted adjacent the end of the leg. The camroller is rotatable about an axis which is substantially parallelto the axes of rotation of the conveyor rollers. The cam rolleris movable to a first upper position in which the cam rollerextends above the plane of the conveyor rollers in the absenceof an article and the axis of rotation of the cam roller remainsbelow the plane of the conveyor rollers in the uppermost position,and a second position in which the uppermost portion of the camroller is urged by an article moving in either direction on theconveyor so that it is substantially in the plane defined by theplane of the conveyor rollers. Sensing means is responsive tomovement of the cam roller for controlling the operation of theconveyor. A plurality of conveyor roller sections having-liverotatable rollers are driven by endless belts and independentlyrotating torque tubes in each of the sections. Each of thesections includes one of the trigger assemblies for controllingmovement of the rollers in a section. The conveyor may be operatedto handle articles in either a slug or singulation mode