Method and device for mounting filler to bead core

1. A method for mounting a strip of a filler in an annular form onto an outer circumference of a bead core with a filler mounting device, wherein the filler mounting device includes:

a base plate;

two eccentric camshafts that are rotationally supported by the base plate, the two eccentric camshafts being located at an inner side of the filler;

two support plates each having an engagement bore, wherein each eccentric camshaft is engaged with the engagement bore of a corresponding one of the support plates;

two actuators each being held on a corresponding one of the support plates;

two pairs of jaws that respectively hold two ends of the filler, which is adhered to the outer circumference of the bead core, wherein each pair of jaws is supported by a corresponding one of the actuators and is moved by the actuator between a holding position and a non-holding position, and two jaws of each pair hold one of the two ends of the filler at the holding position and are separated from the end at the non-holding position;

two first movement members, wherein each first movement member rotates a corresponding one of the eccentric camshafts to move the corresponding pair of jaws away from the bead core and outward in a radial direction of the bead core while the pair of jaws is holding one of the two ends of the filler;

two second movement members, wherein each second movement member pivots a corresponding one of the support plates about the corresponding eccentric camshaft to move the corresponding pair of jaws, which has been moved by the corresponding first movement member, toward the other pair of jaws about the eccentric camshaft; and

two third movement members, wherein each third movement member moves a corresponding one of the pairs of jaws, which has been moved by the corresponding second movement member, toward the bead core,

the method comprising the steps of:

adhering the filler to the outer circumference of the bead core with two end surfaces of the filler separated from each other;

actuating the actuators so that the two pairs of jaws hold the two ends of the filler from opposite sides in a thickness-wise direction of the filler and actuating the first movement members to rotate the eccentric camshafts and move the two pair of jaws outward in the radial direction of the bead core, thereby separating the two ends from the outer circumference of the bead core;

actuating the second movement members to pivot the support plates about the eccentric camshafts and move the two pair of jaws toward each other about the eccentric camshafts, thereby adhering the two end surfaces of the filler to each other sequentially from their inner circumferential portions to their outer circumferential portions; and

actuating the third movement members to move the two pair of jaws toward the bead core, thereby pressing a portion of the filler, which has been separated from the outer circumference of the bead core, against the outer circumference of the bead core.

2. A device for mounting a filler onto an outer circumference of a bead core, the device comprising:

a base plate;

two eccentric camshafts that are rotationally supported by the base plate, the two eccentric camshafts being located at an inner side of the filler;

two support plates each having an engagement bore, wherein each eccentric camshaft is engaged with the engagement bore of a corresponding one of the support plates;

two actuators each being held on a corresponding one of the support plates;

two pairs of jaws that respectively hold two ends of the filler, which is adhered to the outer circumference of the bead core, wherein each pair of jaws is supported by a corresponding one of the actuators and is moved by the actuator between a holding position and a non-holding position, and two jaws of each pair hold one of the two ends of the filler at the holding position and are separated from the end at the non-holding position;

two first movement members, wherein each first movement member rotates a corresponding one of the eccentric camshafts to move the corresponding pair of jaws away from the bead core and outward in a radial direction of the bead core while the pair of jaws is holding one of the two ends of the filler;

two second movement members, wherein each second movement member pivots a corresponding one of the support plates about the corresponding eccentric camshaft to move the corresponding pair of jaws, which has been moved by the corresponding first movement member, toward the other pair of jaws about the eccentric camshaft; and

two third movement members, wherein each third movement member moves a corresponding one of the pairs of jaws, which has been moved by the corresponding second movement member, toward the bead core.

3. The method according to claim 1 , wherein

the end surfaces of the filler each include an inclined surface that is inclined in the thickness-wise direction between a front surface of the filler and a rear surface of the filler,

the step of adhering the two end surfaces of the filler to each other includes adhering the inclined surfaces to each other,

the inclined surface of one of the two end surfaces is inclined such that a thickness of the filler increases toward the front surface, and

the inclined surface of the other one of the two end surfaces is inclined such that the thickness of the filler decreases toward the front surface.