主权项 |
1. A door assembly for providing access to an enclosed space having an opening, the door assembly having a door covering the opening, a pair of spaced apart tracks defining the sides of the opening, the door comprising:
a door panel disposed between the pair of tracks; at least one actuator, the at least one actuator having a rod, the at least one actuator configured to move the rod up and down along one of the pair of tracks; a first pin fixed to the rod, the door panel pivotably mounted to the first pin; a link arm mounted to an interior surface of one of the pair of tracks, the link arm being a generally elongated member generally orthogonal to the pair of tracks; a link having a top end and a bottom end, the top end pivotally connected to a top portion of the door panel, the bottom end pivotably connected to a distal end of the link arm, the link configured guide the door from a closed vertical position to an open horizontal position, wherein movement of the rod from a bottom position to a top position simultaneously lifts the door and rotates the door about the first pin, and wherein the top end of the link remains above the link arm, and wherein the link limits the upward advancement of the door panel so as to guide a top portion of the door downwardly so as to provide access to the enclosed space. |