| 摘要 |
Even when a radial length of a swing arm is increased, no gap is generated between adjacent segments, and tires of various sizes can be handled while roundness of a drum is maintained. An expandable molding drum (10) has a plurality of segments (120) constituting a circumferential surface, the molding drum (10) having a plurality of swing arms (110A and 110B) having one end portion swingably connected to an outer circumferential surface of a cylindrical slider (140) externally fitted with a drum shaft (101) and having the other end portion swingably connected to the segment (120) and expanding/contracting the segment (120) along with movement of the slider (140) in a drum shaft direction, and adjacent end portions of one end portions of the swing arms (110A and 110B) being swingably connected to the outer circumferential surface of the slider (140) at intervals from each other in the drum shaft (101) direction. |
