Tire Building Method and Rotational Transfer Device for Drum Transfer Support Base in Tire Building Process

In a tire building process, a rotational transfer device mounted between a first transfer section and a second transfer section each provided with a travel rail, on which a drum transfer support base supporting a building drum rotatably is transferred to a predetermined building position to cause the drum transfer support bases to rotationally transfer to one of the first and second transfer sections to the other and change in direction,

• the rotational transfer device including a rotating table having an axis intermediate between the first transfer section and the second transfer section, which are provided in parallel to each other on both sides with the rotational transfer device therebetween to get out of position relative to each other, and two pairs of rails for rotational transfer being juxtaposed on the rotating table with the axis therebetween to be positioned corresponding to extensions of travel rails of the first and second transfer sections in a rotation stopped state to receive two drum transfer support bases, each of which enters from the rail of the first or second transfer section, to enable the same to rotationally transfer to the other transfer section at the same time.