U-shaped sliding rail for a sliding piece of an operating arm of a door closing device is fixed directly to a door leaf or door frame via passages arranged in one side

摘要

U-shaped sliding rail (2) is fixed directly to a door leaf (6) or door frame (1) via passages arranged in one side. The passages have a bore and a longitudinal hole (15). A further bore is arranged on one end of the longitudinal hole and has a diameter which is less than the diameter of the bore and larger than the width of the longitudinal hole. Preferred Features: The bore has a slightly larger diameter than a head of a fixing screw. The longitudinal hole is slightly wider than the diameter of the fixing screw.