Patent ID: 8322521
Filing Date: 2012-12-04
Classification: B65G

Abstract:
1. A chain conveyor apparatus comprising: a chain including a plurality of lower link plates; two sprockets engaging with the chain; each of two pressing members disposed adjacent to one side of one of the sprockets, each pressing member including a seat with two first stepped sidewalls, two first ball bearings and a needle bearing extending from each first stepped sidewall, the first ball bearings and the needle bearing being coplanar; and each of two holding members disposed adjacent to another side of one of the sprockets and facing each pressing member, each holding member including a base with two second stepped sidewalls, a plurality of parallel shafts being fixed to two second stepped sidewalls, a second ball bearing being positioned at each of two ends of each shaft, the second ball bearings being coplanar; wherein the lower link plates move in the pressing members, the first ball bearings and the needle bearing rotate on the lower link plates to hold the lower link plates at the same plane, and the lower link plates are supported to move in the holding members, the second ball bearing positioned under the lower link plates to hold the lower link plates at the same plane.