Method for winding belt-shaped member

A method of winding a belt-shaped member around a forming drum comprising the steps of;

• detecting a position of a leading end of a belt-shaped member in width directions, grasping opposite side edges of the leading end of the belt-shaped member by means of lower pawls and upper pawls of grasping units, transferring the leading end to the forming drum by said grasping unit and pressing it against the forming drum, rotating the forming drum during which the belt-shaped member is supplied onto the forming drum to wind the belt-shaped member around a majority of the forming drum, detecting a position of a trailing end of the belt-shaped member in the width directions to obtain a shifted distance between the positions of the leading and trailing ends in the width directions, supplying the trailing end of the belt-shaped member onto the rotating forming drum, while moving the trailing end in a width direction to null the shifted distance between the positions of the leading and trailing ends and thereby winding the trailing end around the forming drum with the coincidence of the positions of the leading and trailing ends of the belt-shaped member, elongating only both side edges of the trailing end of the belt-shaped member in the longitudinal direction by grasping the side edges by means of the lower and upper pawls of the grasping unit while restraining the center of the belt-shaped member by pressing it to the forming drum to correct shortage of the sides of the belt-shaped member, and joining the leading and trailing ends together over the whole width thereof to form a cylindrical tire constituting member.

A method of winding a belt-shaped member around a forming drum comprising the steps of;

• transferring a leading end of a belt-shaped member by grasping opposite side edges of the leading end, pressing the leading end against the forming drum after bringing the leading end into coincidence with a reference position of a forming drum, rotating the forming drum during which the belt-shaped member is supplied into the forming drum to wind the belt-shaped member around a majority of the forming drum, detecting a position of a trailing end of the belt-shaped member in width directions to obtain a shifted distance in the width directions between the position of the trailing end in the width directions and the reference position of the forming drum, supplying the trailing end of the belt-shaped member onto the rotating forming drum while shifting the trailing end in a width direction to null the shifted distance between the position of the trailing end and the reference position of the forming drum thereby winding the shifted trailing end around the forming drum with a coincidence of the position of the trailing end in the width directions and the reference position of the forming drum with resulting coincidence of the positions of the leading and trailing ends of the belt-shaped member in the width directions, elongating only both side edges of the trailing end of the belt-shaped member in the longitudinal direction by grasping the side edges by means of the lower and upper pawls of the grasping unit while restraining the center of the belt-shaped member by pressing it to the forming drum to correct shortage of the sides of the belt-shaped member, and joining the leading and trailing ends together over the whole width thereof to form a cylindrical tire constituting member.