Patent ID: 8397363

Claim:
A belt mounting jig for mounting a belt extendable in a peripheral direction in a pulley groove while rotating a pulley having the pulley groove at an outer peripheral surface, comprising: a fixing unit that fixes the belt mounting jig to the pulley at least until the belt is fitted in the pulley groove; a holding surface which receives and holds a portion of the belt radially outwardly of an outer peripheral surface of a pulley flange and axially outwardly of a pulley axis until the belt is fitted in the pulley groove by sliding in a direction along the pulley axis; a guide surface which guides the belt to the holding surface from outward of the pulley flange in the axial direction of the pulley axis and from forward of the direction of rotation of the pulley; and a projecting portion projecting from the holding surface so as to stride over the pulley flange to be fitted in the pulley groove, an outer surface of the projecting portion being parallel with the holding surface and stepped downward with respect to the holding surface, and an inner surface of the projecting portion defining a recess that engages a pulley flange of the pulley, wherein the guide surface is provided projecting forwardly of the direction of rotation of the pulley relative to a straight line connecting the center of rotation of the pulley and the front end of the holding surface in the direction of rotation so as to rotate the pulley by a tension of the guided belt, and wherein the fixing unit includes an elongated hole fitted around a boss portion of the pulley so as to allow the projecting portion to shift in a radial direction of the pulley, such that the recess disengages from the pulley flange by shifting the belt mounting jig in the radial direction.