Package-transfer apparatus

摘要

A transfer apparatus has a drive disk rotatable at a transfer station about a central axis and defining an eccentric axis offset from the central axis. An inner drive shaft centered on the eccentric axis is rotatably journaled in the drive disk at the eccentric axis. An inner arm is fixed to and extends angularly from the inner drive shaft. An outer arm is pivoted at the inner-arm outer end, and a grab is pivoted on the outer-arm outer end. A drive rotates the drive disk about the central axis and thereby orbits the inner arm, the outer arm, and the grab about the central axis. An inner controller changes an inner angle formed between the inner arm and the outer arm, and an outer controller changes an outer angle formed between the grab and the outer arm.