Driving system for folding windows and doors in building has two bearings that allow longitudinal sliding along the lower guide rail, and rotate about axis of window frame, respectively

摘要

The driving system has a hinge shaft (2) with a plate having holes. A lower guide rail has height higher than the rest of the window frame to accommodate double bearing. One of the bearings allows longitudinal sliding along the lower guide rail. The other bearing rotates about the axis of window frame.