Door operation system

A door operation system for a door, the door comprising:

• a protective barrier configured to be in a rolled-in open state and configured to cover a door opening in a rolled-out closed state;
• and
• first tracks arranged on side frames at each side of the protective barrier;
• the door operation system comprising:
• spiral tracks arranged on the side frames at each side of the protective barrier for accommodation of the protective barrier in the rolled-in open state, wherein the spiral tracks each comprise a curved surface and a center, where centers of the respective spiral tracks define a horizontal axis;
• and
• a drive unit connected to one of the side frames for moving the protective barrier from the rolled-out closed state to the rolled-in open state and vice versa;
• a torque transmission unit connected at a first end with the at least one drive unit at the center of the one spiral track and extending into a space between the spiral tracks,
• wherein the protective barrier comprises first transmission elements connected to a second end of the torque transmission unit and wherein the torque transmission unit extends into the space at an angle with respect to the horizontal axis;
• wherein the spiral tracks each comprise a second transmission element, wherein the second transmission element is configured to follow a contour of the curved surface of the respective spiral track;
• and
• wherein the first transmission elements are omega drive units fixed to an upper area of the protective barrier and configured to mesh with the second transmission elements and to move the protective barrier along the curved surfaces by operating the drive unit for moving the protective barrier from the rolled-out closed state to the rolled-in open state, and vice versa, wherein the omega drive units pull a top of the protective barrier along the curved surface into the rolled-in open state, wherein the angle varies as the protective barrier moves along the curved surfaces and wherein the torque transmission unit compensates for changes of the angle.