| 摘要 |
A power transmission chain ( 1 ) has links ( 11 ), pins ( 14 ), and interpieces ( 15 ). The links ( 14 ) each have a front and a back insertion parts ( 12, 13 ) through which the pins are inserted. The pins ( 14 ) and the interpieces ( 15 ) connect links ( 11 ) that are arranged side by side in the lateral direction of the chain such that the front insertion part ( 12 ) of one of the links ( 11 ) and the rear insertion part ( 13 ) of the other link ( 11 ) correspond to each other, and the connection is made such that that the links ( 11 ) are bendable in the longitudinal direction. The locus of a contact position of a pin ( 14 ) and an interpiece ( 15 ) is an involute of a circle. Two or more kinds of sets of a pin ( 14 ) and an interpiece ( 15 ) having different radii of base circles of involutes are formed, and these sets of a pin ( 14 ) and an interpiece ( 15 ) are randomly arranged.
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