ASSEMBLY DRUM HAVING EXPANDABLE CENTER PART AND INDEPENDENTLY EXPANDABLE BEAD LOCK ASSEMBLY BODY AT END

摘要

PROBLEM TO BE SOLVED: To maintain a concentrical drum surface and a uniform diameter along the length of a drum in an expanded and contracted state of a drum. SOLUTION: A tire assembling drum 700 has a center part 720 and two ends 722, 724. Each of ends 722, 724 is provided with expandable bead lock assembling body 726. The center part 720 is preferably expandable. The bead lock assembly body 726 has a plurality of prolonged rinks (K) extending between a carrier ring (CR) and a plurality of segments (S) expandable in the radial direction. When the carrier ring moves to the inside (approaching toward the center part), the segment which is expandable in the radial direction moves in the outwardly radial direction. A plurality of finger segments (F) which extend in the radial direction and are arranged at an interval in the peripheral direction are moved from a foldable position to an outwardly expanded position to be moved to at least one position among these positions. COPYRIGHT: (C)2003,JPO