Seat belt retractor, seat belt apparatus, and seat belt winding method

摘要

In order to provide a seat belt retractor (1) which can conduct effective winding-up of a seat belt (2), the seat belt retractor (1) of the present invention comprises a control unit (123) which stops actuation of a motor when an overload of the motor is detected and restarts the actuation of the motor after a lapse of a predetermined time period. The control unit (123) comprises a motor actuation timing section (403) which clocks a time period from the start of the actuation to the stop of the actuation of the motor (motor actuating time period), a motor actuation counting section (404) which counts the number of times of starting the actuation of the motor (motor actuation number), and a retry determining section (405) which determines, based on the motor actuating time period and the motor actuation number, whether or not it is required to restart the actuation of the motor which is stopped by detection of the overload.