Construction device for precise back to back fixing of two plate-shaped prefabricated parts

摘要

The device for holding two symmetrical plate shaped prefabricated parts (1,2) back to back has a bolt (5) passing through a common hole in each part surrounded by a flexible sleeve (18). Between the bolt and the sleeve is a cylindrical sealed pressure chamber (22) which is filled with a medium which exerts a radial force on the sleeve. The amount of the force can be adjusted by a valve arrangement (24-26). The flexible sleeve cannot move axially within the hole, but the bolt can move axially within the sleeve. The end of the bolt is screwed into a threaded section in the second part. When the bolt moves, it alters the volume in the pressure chamber.