WEBBING WINDING DEVICE AND SEAT BELT DEVICE

PROBLEM TO BE SOLVED: To achieve smooth winding and storing of webbing and high occupant restraint performance when wearing the webbing, by using driving force of a motor.SOLUTION: A webbing winding device 16 comprises: first transmitting means that transmits rotation of an output shaft to a winding shaft so that the winding shaft is rotated in a winding direction, by rotating the output shaft in a first direction; and second transmitting means, when transmitting the rotation of the output shaft to the winding shaft so that the winding shaft is rotated in the winding direction by rotating the output shaft in a second direction, transmits winding torque of the winding shaft in a range where the winding torque does not reach preset first torque. An ECU 172, when engagement of a tongue and a buckle is detected by a buckle switch 174, rotates an output shaft 48A of driving means in a first direction and closely contacts webbing with an occupant so that the winding torque of the winding shaft reaches second torque at which predetermined occupant restraint performance can be achieved.SELECTED DRAWING: Figure 4 【課題】モータの駆動力を用い、円滑なウェビングの巻取格納、及びウェビング装着時の高い乗員拘束性を得る。【解決手段】ウェビング巻取装置１６は、出力軸が第１の方向へ回転されることで、出力軸の回転を、巻取軸が巻取方向へ回転されるように伝達する第１の伝達手段、及び出力軸が第２の方向へ回転されることで、出力軸の回転を、巻取軸が巻取方向へ回転されるように伝達する際、巻取軸の巻取トルクが予め設定された第１のトルクに達しない範囲内で伝達する第２の伝達手段を備える。ＥＣＵ１７２は、バックルスイッチ１７４によりタングとバックルとの係合が検出されると、巻取軸の巻取トルクが予め設定された乗員拘束性が得られる第２のトルクに達するように、駆動手段の出力軸４８Ａを第１の方向へ回転させ、ウェビングを乗員に密接させる。【選択図】図４