| 摘要 |
Conveyor chains are provided which comprise free balls which are free to rotate in all directions thereby allowing for the stable conveyance of articles in any direction in the entire horizontal plane and at an increased speed in the direction of conveyance with reduced contamination in the conveyance environment. A conveyor chain 100 comprises a number of chain links 110 comprising a plurality of hinge portions 112 in a zigzag formation protruding from the front and rear end edges that are connected to each other in the longitudinal direction of the chain through hinge pins 120 . Free balls 131 protrude from both the surface and back sides of the chain link 110 and are free to rotate while held in the chain link 110 . Either the free balls 131 or ball holding portions 132 , which hold the free balls 131 , is made of polyacetal while the other is made of polyamide or polyester.
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