Steel rolling door
OwnerSui K. Chenginventor
Life of this patent
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Abstract
An improved steel rolling door is equipped with a a number of pivot plates which are engaged with each other side by side and pivotally associated with one side of the topmost collapsible door plate, and a plurality of pulling wires which are engaged with the opposite side thereof so as to permit the collapsible door plates to be adjusted from a horizontal position to a vertical position, i.e., from an opening position to a closing position, or vice versa. Moreover, the door plates are consecutively connected to each other one by one by way of a plurality of linking pieces and length variable linkage assembly units each including a pair of pivot parts and a connector so that the door plates can be easily and smoothly collapsed and rolled up along a rolling shaft without getting stuck in operation.
Claims3
An improved steel rolling door having a motor driven rolling shaft, a plurality of collapsible door plates consecutively pivotally connected to each other by way of linking pieces, and a pair of sliding tracks in which the ends of said door plates are slidably confined, each said door plate having a supporting rod disposed along each of curvedly bent edges of said door plate, each end of said door plate having a stop means for limiting said supporting rods in place;
- said motor driven rolling shaft being used to roll the collapsible door plates continuously thereon in a receiving operation or to unroll said door plates;
- wherein the improvement lies in that the rolling door has a plurality of pivot plates which are pivotally connected to each other side by side so as to make them foldable;
- a first pivot plate is engaged with the rolling shaft at one side and a last pivot plate is pivotally engaged with one side of a topmost door plate;
- and a plurality of pulling wires led through a plurality of through holes disposed on said last pivot plate are engaged with the opposite side of said topmost door plate from that which is pivotally engaged to said last pivot plate whereby said Collapsible door plates can be adjusted from a horizontal position to a vertical position or vice versa by actuation of said rolling shaft and said pivot plates and said pulling wires simultaneouly.
Dependencies are inferred from the claim text.