| 摘要 |
PROBLEM TO BE SOLVED: To provide a roller chain capable of sufficiently lubricating a roller end surface and improving productivity and assemblability. SOLUTION: In the roller chain, a plurality of rollers 14 are arranged on the outer peripheral surface of a bush 13 whose both ends are connected to a pair of inner link plates 12, and a roller 15 is equipped surrounding a plurality of rollers 14. A collar ring 19 provided apart from the roller 15 is arranged on at least either of the both ends of the roller 15. The collar ring 19 is provided with a guide surface 19a for guiding an end surface of the plurality of rollers 14. In the guide surface 19a, three circular grooves 19b are concentrically formed as a recess for storing lubricant.
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