Large size rapid opening door

摘要

The large door has three leaves (10,20,30) of identical dimensions which are vertically superposed when the door is closed. The door has hinges fixed to the leaves, the lower (30) and upper (20) leaves being able to pivot about the central leaf (10) in the same direction about the central leaf lower and upper horizontal edges. The central leaf is mounted so as to rotate about its horizontal median axis and has guide rails fixed to the framework (50). These rails guide the upper edge of the upper leaf between a closed position, in which it is located in the plane of the central leaf, and an open position in which it is folded against the central leaf. The central leaf rotates through 180 degrees between the open and closed positions in the opposite direction of rotation to that of the upper and lower leaves.