| 摘要 |
PROBLEM TO BE SOLVED: To provide a chain structure capable of securely preventing occurrence of phenomenon of improper rotation of a roller. SOLUTION: In this chain structure provided with a roller bush 20 integrally in an inner peripheral part of the roller 18 provided rotatably at the outer periphery of a pin bush provided at the outer periphery of a connection pin for connecting a link plate, recessed step parts 20a are formed in an outer peripheral part of each of both end parts of the roller bush 20, and a stepped bush 22 in which a projecting step part 22a engaging with the recessed step part 20a is formed in an inner peripheral part of an outer side end part among each of both end parts of the roller bush 20 and parts of the roller 18 corresponding to each of both end parts of the roller bush 20. COPYRIGHT: (C)2006,JPO&NCIPI
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