PURPOSE: To smoothen the automatic supply of beads to a beads holder by providing a vertically movable segment and slidable bead extruder to the periphery of an automatic bead supplying drum.

CONSTITUTION: Large numbers of beads 31 are stocked on the peripheral face 8a of an automatic bead supplying drum, a segment 42 fitted into the dovetail groove in the axial direction of the peripheral face is raised in the diametrical direction by a cylinder 45. A slider 41 is advanced with the segment 42 by the cylinder 44, and all the beads 31 group is integrally advanced by one stroke. The slider 41 is contacted with the stopper 46 and stopped. The beads 31 on the foremost row are supported on the bead receiver 28 on the transfer ring side, a separator 47 is raised by the cylinder 48, and at the same time the segment 42 is lowered by the cylinder 45. The next beads 31 are pushed up and exactly separated from the foremost end bead group.