Patent ID: 6736259
Filing Date: 2004-05-18
Classification: B65G

Abstract:
A chain for use in a three-dimensional conveyor line, comprising synthetic resin-made chain links endlessly connected together and of which two adjacent ones are hinged to each other by a shaft pin, wherein:each of the chain links includes a top plate part on which a product to be conveyed is placed, and a link part formed at the lower side of the top plate part to hinge two adjacent chain links to each other; the link part includes a head portion projecting frontward from the central front end of the top plate part and a pair of leg pieces projecting rearward from the right and left rear ends, separated from each other, of the top plate part; the projecting head portion has the shaft pin penetrated through it and is formed circular at the upper surface thereof nearly along a circle whose center lies on the longitudinal axis of the shaft pin and smoothly contiguous to the upper surface of the top plate part; the length of the top plate part in the conveying direction is set shorter than the chain pitch; and the top plate part has a lower slant face formed on the front edge thereof while having formed in the middle rear edge thereof a curved concavity with a concave slant face.