Vertical door system with ball screw drive

A vertical door system, comprising:

• a door, arranged in a door opening and having a door frame, the door frame having at least one frame section;
• an operator;
• two vertical supports configured to:
• (a) be installable on opposite sides of the door opening and (b) support the vertical door, at least one of the vertical supports having:
• a guide track on a surface of the vertical support facing toward the door opening;
• and
• a drive system comprising:
• an elongated threaded rod drivable by the operator via a gearing arranged between the operator and the threaded rod, the threaded rod being configured for operative connection with the operator for rotating the threaded rod about the longitudinal axis of the threaded rod in a first and a second direction, the longitudinal axis being vertically-oriented and parallel to the guide tracks;
• and
• one or more blocks, each of the one or more blocks comprising a guide track connecting portion configured to connect to one of the guide tracks so the connected block is freely moveable along a respective one of the guide tracks, each block having a through-bore for accepting the threaded rod so that the block is positioned on the threaded rod and is moveable along the threaded rod,
• wherein each of the one or more blocks comprises a door frame connecting portion arranged on a side of the block opposite the guide track connecting portion, each block being configured to pivotally connect to the vertical door by the door frame connecting portion,
• wherein at least one of the one or more blocks comprises a drive nut configured to mate with threads of the threaded rod without rotating relative to the block or relative to the threaded rod, so that the block having the drive nut acts as a driven block which moves in an upward direction when the threaded rod rotates in the first direction and in a downward direction when the threaded rod rotates in the second direction;
• wherein the guide track connecting portion configured to connect to one of the guide tracks comprises slider blocks configured to be slidable along the guide tracks;
• wherein the guide track connecting portion has two guide track attachment portions extending from the block and having vertically-oriented grooves configured to slidably couple with the guide track;
• and
• wherein the guide track has two vertical guide rails and a common base portion attached to the support, wherein each of the vertical guide rails has a cross-section that includes a section of a circle and a portion that joins the common base portion, of the guide track, wherein the vertically-oriented grooves of the guide track attachment portions have a cross-section corresponding to the cross-section of the respective vertical guide rails so that the block is slidable along a length of the guide track but is prevented from becoming detached from the guide track due to forces transverse to an axial direction of the guide track.