Classifications

• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
  • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
  • E06B9/08—Roll-type closures
  • E06B9/11—Roller shutters
  • E06B9/15—Roller shutters with closing members formed of slats or the like
• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
  • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
  • E06B9/08—Roll-type closures
  • E06B9/11—Roller shutters
  • E06B9/17—Parts or details of roller shutters, e.g. suspension devices, shutter boxes, wicket doors, ventilation openings
• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
  • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
  • E06B9/08—Roll-type closures
  • E06B9/11—Roller shutters
  • E06B9/15—Roller shutters with closing members formed of slats or the like
  • E06B2009/1505—Slat details
  • E06B2009/1516—Means to increase resistance against bending

Definitions

• This invention relates to "roll-up”, “glide-away” and other retractable or sliding doors including those of the kind comprising a flexible door member which may take the form of a system of parallel slats disposed edge-to-edge in a flexible system guided for movement between a fully closed and a fully open position with respect to a doorway.
• a device for the purpose of this specification such a device will be referred to generically as a "door", although the invention may equally be applicable to sliding or roll-up shutters, blinds or other closures.
• My invention is advantageously applicable to vertical roll-up type doors such as are opened and closed by winding upon a horizontal drum located above the doorway.
• the drum can be operated by any suitable means e.g. an electric motor with appropriate trip-switches, or manually from ground level such as via a suitable chain and pulley system.
• the invention is also applicable to doors of the "glide-away" type and others wherein, instead of being rolled up, a flexible door member is simply pulled up and back in guides curved through 90° into a retracted horizontal position beneath the roof of the building to which the door gives access.
• This latter type can be useful where the interior space, height or clearance between the top of the door and the roof/ceiling is insufficient to accommodate a drum.
• Such doors have been prone to damage due to pressure of high winds, which pressure tends to "belly" the door inwards like the sail of a square-rigged ship. This effect is seen to be due in large measure to the lack of support for the lower part of the door.
• Such doors are often prone to damage by would-be trespassers, thieves and others attempting unauthorized entry, or to damage by wanton acts of violence and vandalism.
• SUBSTITUTE SHEET suitable vehicle such as a fork-lift truck, against the inside of the door when shut,.especially when the premises are being closed for the night. However this can be troublesome and is easy to forget.
• An object of the present invention is to improve the ability of a door to withstand inward pressure such as due to very high winds or the depredations of vandals or potential trespassers.
• a roll-up or sliding door assembly for a doorway is characterized by door-strengthening means adapted to be progressively and automatically positioned and removed by the door's closing and opening, respectively.
• Figure 1 is a rear elevation of a door with strengthening or re-infordng means according to one practical embodiment of the invention, the door being shown fully closed;
• Fig. 2 is a rear elevation corresponding to Fig. 1 but with the door fully open;
• Fig. 3 is an enlarged detailed elevation of the region designated 3-3 in Fig. 1;
• Fig. 4 is a horizontal section- of the Fig. 3 region, as designated by 4-4 in Fig. 1;
• Fig. 5 is a section across line 5-5 in Fig. 1;
• Fig. 6 is a section across line 6-6 in Fig. 5, and
• Hg. 7 is a rear elevation of a door with re-enforcing means according to another practical embodiment of the invention involving articulation of the bracing elements or rods.
• Fixed to each side member is a channel-section guide 10 wrthin which slides the corresponding edge portion of door 8 between resilient strips 11 of rubber or the like.
• the bottom or leading edge of door 8 is a bar 12 having a lower, inwardly-projecting flange 12 which forms a ledge or shelf which as the door is raised, is adapted to "catch" bar and to carry the stad. of bars 14, 15 and 16, as best shown in Hg. 2.
• Bar 14 may be shorter than bar 15 and bar 15 shorter than 16, for reasons which will appear hereinafter.
• bars 14, 15 and 16 are supported at the i r ends by pairs of holders (17, 18), (19, 20) and (21,22) respectively fixed to the door guides.
• Each pair of holders is positioned to "catch"' hold and support the relevant bar as the topmost bar of the stack carried by the descending door, and to allow the rest of the stack to pass Hence in this embodiment each pair of holders must be further apart than the length of the rod supported next below.
• brackets comprising each pair are fixed at distances transversely d i splaced somewhat outwards (i.e. away from the doorway) from those next below, and bar 15 is correspondingly longer than 14 and 16 than 15
• Bars 14, 15 and 16 may be hollow or solid steel bars of s t atable cross-section and strength, which may depend upon the span of the door. However in the Illustrated embodiment they are of inverted channel-section to provide recessing for bracing *ods 24 as more fully described hereinafter.
• each bar except the last or topmost may have top-bevelled pins (not
• SUBSTITUTE SHEET shown projecting upwardly therefrom and receivable in complementary holes in the underside of the bar next above (i.e. next "behind”).
• the number of bars, and their mutual spacing when the door is shut, can be as desired. It may be found advantageous to space the bars more closely nearer the ground, where the door will be most prone to damage and, consequently, where most strength will be needed.
• Inter-bar bracing may be provided by rods or struts 24.
• Each successive pair of bars such as 14, 15 (Figs. 5 and 6) may be inter ⁇ strutted by two such rods 24 symmetrically arranged about the vertical mid-line of the door.
• the lower ends of rods 24 are hinged in blocks 25 fixed to bar 14, while their upper ends are adapted to slide in a recess 26 defined by the underside of bar 15.
• the upper end of rod 24 may be provided with a relatively wide head 27 slidable on runners 28 within recess 26. This arrangement tends to assist close stacking of the bars when the door is fully open as shown in Fig. 2, especially if the recesses are wide enough to accommodate rods 24 and blocks 25 in toto.
• Fig. 7 shows an alternative form of strutting whereby inter- bar bracing is provided by articulated links 28 hinged to each other and to the respective bars so as to open and close concertina-wise as the door opens and closes.
• each successive pair of bars may be interstrutted by two pairs of links symmetrically arranged about the vertical mid-line of the door.
• the hinges are recessed in the bars so as not to interfere with their dose-stacking when the door is fully closed.
• the re-inforcing system provided by the invention can readily be produced in kit form with bars in standardized lengths capable of being cut shorter, as necessary, and of being fitted with suitable end portions to make up completed bars in the desired effective total lengths.
• the holder-pairs 17, 18 etc. are shown as mutually offset in a transverse direction with bars correspondingly graded in lengths, other shapes and relative dispositions of holders and bar ends may be possible to achieve the same result i.e. bars being progressively deposited on and removed from their respective holders as the door is closed and opened respectively.
• the invention provides a very simple means for strengthening a "roll-up", “glide-away” or other kind of sliding or retractable door, including those moving vertically, horizontally or otherwise.
• the invention may be incorporated in new installations or may be supplied e.g. in kit form for addition to existing doors.

Landscapes

• Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Wing Frames And Configurations (AREA)

Applications Claiming Priority (4)

Publications (2)

Family

ID=25643594

Family Applications (1)

Country Status (4)

Families Citing this family (3)

Family Cites Families (8)

• 1989
  • 1989-12-04 NZ NZ23161989A patent/NZ231619A/en unknown
  • 1989-12-05 WO PCT/AU1989/000524 patent/WO1990006415A1/en not_active Ceased
  • 1989-12-05 EP EP19900900030 patent/EP0449855A4/en not_active Withdrawn
  • 1989-12-07 CA CA 2004849 patent/CA2004849A1/en not_active Abandoned

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