Roll-bar drive unit for displacing a roll-bar from a storage position into a rollover position and rollover protection for motor vehicles

The rollover body drive unit (1) is provided with a pressure chamber (4) comprising a housing (2) with a guide section (5). A drive body (3) is connected to the roll-over body, where the connecting area (6) and a section are arranged on the guide. The pressure chamber is operatively connected to gas generator (8).