Patent ID: 8783449

Claim:
A conveyor chain comprising: a large number of chain links into which an article loading part to be loaded with articles and a plurality of hinge portions protruding in a staggered manner from a front end edge and a rear end edge in a longitudinal direction of the chain are integrally molded; hinge pins connecting the hinge portions of the chain links; and a plurality of free rollers protruding through both front and rear surfaces of the chain links, wherein the plurality of free rollers are rotationally held in roller holders one by one to constitute a roller unit, the chain links have a unit mounting region providing for the roller unit to be mounted from the longitudinal direction of the chain, the roller holder has a cylindrical circumscribing surface, the unit mounting region has a contact surface in contact with the circumscribing surface of the roller holder in a semicircle, and the circumscribing surface of the roller holder and the contact surface of the unit mounting region are prevented from rotating by an engagement apparatus comprised of a protruding portion provided on one of the surfaces and a recess portion provided on the other.