Device in roll-up doors

Details Device in roll-up doors Device in roll-up doors

1988-09-16

1989-12-26

Johnson, Blair M.

Flexible or portable closure, partition, or panel

Roll type

With fabric reinforcements

160266, A47G 502

Patent

active

048891762

DESCRIPTION:

BRIEF SUMMARY
The subject invention concerns an improved roll-up door and particularly a device in roll-up doors of the kind comprising at least one flexible door leaf which may be wound onto a roller. Doors of this kind are generally intended for door openings which are large enough to allow passage-through of vehicles of considerable dimensions, for which reason the door leaf, usually in the form of a fabric, must have a considerable surface area. When powerful winds blow against doors made from fabric having a large surface area considerable problems may arise because the fabric will bend and bulge to an unacceptable degree. This may cause difficulties, such as sealing difficulties, particularly against the door-frame. The purpose of the subject invention is to remedy these problems.
The device in accordance with the invention consists of a number of reinforcement elements which extend crosswise relatively to the door leaf. The improved roll-up door is characterized therein that the reinforcement element or elements are not connected to the door leaf and are provided with end pieces which are arranged to cooperate dimensionally with abutments provided in profiled guiding members, located in the door frame for the purpose of setting said reinforcement elements at different predetermined levels.
Further advantages and characteristics will appear from the dependent claims and the following detailed description of a preferred embodiment.
The invention will be described in closer detail in the following with reference to the accompanying drawings, wherein
FIG. 1 is a lateral view of a door in accordance with the invention,
FIGS. 2 and 3 illustrate, on an enlarged scale and in sectional views, details in a door in accordance with the invention, and
FIG. 4 is a lateral view of a door comprising double door leaves.
The door illustrated in FIG. 1 which may be of the kind shown and described in U.S. Pat. No. 3,878,879, comprises a roll-up door leaf 2 which may be wound onto a roller 1. In accordance with the shown embodiment the door leaf 2 is of single leaf type and consists of heavy cloth. When a door of this kind is exposed to the effects of heavy wind the cloth 2 will bend, which in turn may result in sealing problems. To eliminate problems of this kind it is suggested in accordance with the teachings of the subject invention to use one or several separate reinforcement elements, preferably in the manner shown, in the form of tubular elements 3, 4, 5 or elements of some other suitable profile configuration, so that these elements extend crosswise relatively to the door leaf and across the entire width of the door. When the door is in its lower closed position the reinforcement elements 3, 4, 5 preferably will be spaced essentially equal distances apart. At its lower end the door leaf 2 is provided with a hook 6 which--as shown in FIG. 2--is attached to the door leaf 2 by means of a stiffening rib 7. When the door is being rolled up the hook therefore will lift the reinforcement elements 3, 4, 5 to a position adjacent the roll-up roller 1 of the door leaf 2 where the elements will be gathered adjacent each other.
As illustrated in FIG. 3 each end of the reinforcement elements 3, 4, 5 is provided with an end piece 9. The dimensions of the end pieces 9 are specific for each individual reinforcement element so that by providing profiled guiding members 10 which cooperate with the end pieces, with insets at unequal spacings, as illustrated in FIGS. 1 and 2--see details 11, 12--it becomes possible to make the reinforcement elements 3, 4, 5 stop in the desired vertical positions when the door is being closed.
To protect the hook 6 the profiled guiding member 10 preferably is provided with a protective guard 13. Preferably, the protective guard 13 is pivotable or easily removable to make the protected components easily accessible for servicing, when required.
FIG. 4 illustrates a double-leaf door 2, 2'. In accordance with this embodiment the reinforcement elements 3, 4, 5 are positioned intermediate the two door leaves 2, 2' and c

REFERENCES:
patent: 1833140 (1931-11-01), Traut

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