DRIVING ENDLESS BELT

PURPOSE:To improve productivity, by a method wherein a pin pulling-off preventing means is mounted on the block side. CONSTITUTION:The one pin hole 51a of a link piece 31a and the one pin hole 42a of a link piece 32a are joined with each other and are pivotally secured to each other by means of a pin P1, and a block B1 is fitted in the link piece 32a from a hollow pin groove 11 side. The other pin hole 52a of the link piece 32a and the other pin hole 41b of the link piece 31b are joined with each other and are pivotally secured to each other by means of a pin P2, and a block B2 is engaged, in the same direction as that of the block B1, with the link piece 31b. The followings are joined, in order, through repetition of the above processes, and finally, after a link piece 32n is pivotally secured, a block Bn is engaged with a link piece 31a, the other pin hole 51n of a link piece 32n is pivotally secured to the one pin hole 41a of the link piece 31a by means of a final pin Pn, and pin pulling-off preventing means are attached to the opposite ends of the final pin Pn. Snap rings 32 are mounted as the pin pulling-off preventing means to the opposite ends of the pin Pn.