Rollover protection system for automobiles

The invention relates to a rollover protection system for automobiles, comprising an extensible rollover body (1) held in an initial position by means of a holding device and secured against retraction, in a functional position by means of a locking device, and comprising an extension drive and an actuator (2) for releasing the holding device. Separate holding and locking devices are usually provided in such rollover protection systems, which is expensive both from a technological and an economic point of view. For simplification it is suggested according to the present invention that the holding device and the locking device be combined in one assembly (3). The assembly is arranged on the side adjacent to the rollover body (1) in a housing (16). The rollover protection system can be attached to the vehicle body by means of mounting elements (14 and 15), and the assembly (3) can be mounted in a position fixed on the vehicle. Upon extension of the rollover body (1), an engagement element of the assembly (3) engages the locking recess (6) of the rollover body (1).