Patent ID: 6889931

Claim:
A webbing winding device comprising: a winding shaft at which a proximal end portion of a long belt-form webbing belt is anchored, the winding shaft winding the webbing belt in a layered form at a periphery thereof when the winding shaft is rotated in a winding direction one way about an axis thereof, and the winding shaft rotating in a drawing out direction, which is opposite to the winding direction, while the webbing belt is drawn out by the webbing belt being pulled to a distal end side thereof; a slave shaft coaxially and integrally attached to the winding shaft; a motor side rotating body including a peripheral wall, at an inner side of which the slave shaft is disposed at a vicinity of an axial center of the motor side rotating body, the motor side rotating body being coaxially relatively rotatable with respect to the slave shaft, and the motor side rotating body receiving driving force from driving means for rotating about the axial center of the slave shaft; a ring-form intermediate rotating body disposed at the inner side of the peripheral wall, between the slave shaft and the peripheral wall, the intermediate rotating body being relatively rotatable about the axial center of the motor side rotating body with respect to both the motor side rotating body and the slave shaft; a coupling member disposed between the intermediate rotating body and an outer peripheral portion of the slave shaft, the coupling member mechanically coupling the intermediate rotating body with the slave shaft in conjunction with rotation of the motor side rotating body; and a torque limiter disposed between an inner peripheral portion of the peripheral wall and an outer peripheral portion of the intermediate rotating body, the torque limiter including one portion which is anchored at one of the peripheral wall and the intermediate rotating body and another portion which is engaged with the other of the peripheral wall and the intermediate rotating body, the torque limiter mechanically coupling the peripheral wall with the intermediate rotating body and the engagement being released by a relative rotation force of the peripheral wall with respect to the intermediate rotating body of at least a predetermined value.