BELT RETRACTOR HAVING TWO TAUTENING DEVICES

摘要

A self-blocking belt retractor has an emergency tautening device, which is provided for the belt shaft and which can be tripped, in particular, during an accident, and has a second tautening device, which is also connected to the belt shaft and which is designed as a reversibly operating pre-tautening device. The invention is characterized in that the emergency tautening device (15) is designed to work at a higher rotating speed than the rotating speed produced by the pre-tautening device (11), and the coupling (13, 17, 20) between the pre-tautening device (11) and the belt shaft (14) is designed in such a manner that after the emergency tautening device (15) is tripped, the belt shaft (14) thereby set in a faster rotating motion brings the coupling (13, 17, 20) back into its releasing position whereby releasing the coupling connection between the belt shaft (14) and the pre-tautening device (11).