Patent ID: 7617668
Filing Date: 2009-11-17
Classification: B21L,Y10T

Abstract:
1. A method of producing a power transmission chain comprising a plurality of links, and a plurality of pins interconnecting the links arranged along a longitudinal axis of said pins, wherein each of the pins is fixed to the links by press-fitting, said method comprising: retaining, in a first retaining jig, a required number of pins in a pattern corresponding to a final arrangement of said pins such that said pins are arranged at a predetermined pitch; successively press-fitting approximately one half of a required number of links, arranged along the longitudinal axis of said pins, to said pins from approximately a center of said pins along the longitudinal axis of said pins to a first end portion of said pins from which said links are being pressed; disposing, in a second retaining jig, said pins, having the approximate one half of said links press-fitted thereto, in an inverted manner such that the first end portion and a second end portion of the pins are reversed; and successively press-fitting a remainder of the required number of links, arranged along the longitudinal axis of said pins, to said inverted pins from about the center of said pins along the longitudinal axis of said pins to the second end portion of said pins from which said links are being pressed thereof.