| 摘要 |
PROBLEM TO BE SOLVED: To provide a chain in which a pair of connection pin parts apply chain tension as tensile tension to a pair of plate parts connecting the pair of connection pins in opposite parts in a longitudinal direction thereof, to improve fatigue strength of the plate parts to improve durability, and sliding resistance between a link unit and a link plate is reduced to reduce a power loss.SOLUTION: A chain 100 includes a link unit 101 in which a pair of link plates 160 are connected in a bendable manner. The link unit 101 is formed by integrally and inseparably joining the pair of connection pin parts 110 and the pair of plate parts 140 in junction parts 150 of the pair of connection pin parts 110 positioned in a pair of opposite parts 111 opposite to each other in the longitudinal direction. In the connection pin parts 110, restriction parts 123 for restricting the link plates 160 from coming close to the plate parts 140 are provided between the plate parts 140 and the link plates 160 adjacent to each other in the width direction. |
