Winding member manufacturing method, winding member manufacturing apparatus, winding member peripheral length measuring apparatus and pre-tension applying apparatus

An apparatus for manufacturing a winding member provided with a plurality of links and a plurality of pins for connecting the links and wound around two pulleys of a continuously variable transmission, the apparatus comprising:

• a pre-tension applying apparatus including a first pre-tension applying pulley and a second pre-tension applying pulley around which an endless shaped chain is configured to be wound,
• wherein each of sheave surfaces, which are mutually opposed to each other, of the first and second pre-tension applying pulleys has a concave curved portion,
• wherein an end face of each of the pins has a convex curved portion,
• wherein the concave curved portion of each of the sheave surfaces corresponds to the convex curved portion of the end face of each of the pins, and
• wherein a winding diameter of one of the first and second pre-tension applying pulleys of the pre-tension applying apparatus is less than a minimum winding diameter of the two pulleys of the continuously variable transmission.

An apparatus for manufacturing a winding member provided with a plurality of links and a plurality of pins for connecting the links and wound around two pulleys, said apparatus comprising:

• a pre-tension applying apparatus including a first pre-tension applying pulley and a second pre-tension applying pulley around which an endless shaped chain is configured to be wound;
• and
• a pulley moving device configured so as to move the first pre-tension applying pulley towards and away from the second pre-tension applying pulley,
• wherein each of sheave surfaces, which are mutually opposed to each other, of the first and second pre-tension applying pulleys includes a concave curved portion,
• wherein an end face of each of the pins includes a convex curved portion,
• wherein the concave curved portion of each of the sheave surfaces corresponds to the convex curved portion of the end face of each of the pins, and
• wherein a radius of curvature R of the concave curved portion of each of the sheave surfaces is set such that 0.8r≦R≦5r, where r expresses a radius of curvature of the convex curved portion of the end face of each of the pins.