To automatically supply grease during rotation by providing on a driven shaft, a grease guiding pipe with one end communicated with a position opposed to a leading-out port in an axial direction on an outer peripheral surface of the driven shaft, and the other end communicated with a universal joint, and arranging a grease supplying hole on a sleeve communicated with the grease guiding pipe disposed on the driven shaft.
A passage for supplying grease to a universal joint 7 is composed of a fixing part grease guiding pipe 16b, a grease supplying hole 16d, and a rotating part grease guiding pipe 16f. Constant grease supplying pressure is applied on the fixing part grease guiding pipe 16b through a grease supplying pipe 17 by a grease supplying pump (a) at all times. Its leading-out port 16c is closed to an outer surface of a sleeve 5, grease supplying pressure is applied to the rotating part grease guiding pipe 16f through the grease supplying hole 16d to supply grease, when the sleeve 5 is rotated together with a roll shaft 1 to meet the grease supplying hole 16d.
MURAMOTO HARUMASA
KAMIMURA KOICHI
