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
  • E06B9/165—Roller shutters with closing members formed of slats or the like with slats disappearing in each other; with slats the distance between which can be altered
• • 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
  • E06B2009/1533—Slat connections
  • E06B2009/1538—Slats directly connected
• • 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
  • E06B2009/17069—Insulation
• • 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
  • E06B2009/17092—Manufacturing

Definitions

• the present invention relates to a roller shutter with more than one 'closed' configuration, which allow variable levels of light to pass.
• the roller shutter is a type of wall consisting of many horizontal slats attached by hinges. Due to these hinges the shutter may be drawn along a curve and out of the way, as in a garage door, or rolled into a spiral within a pelmet box, as in some window blinds. Roller shutters allowing some degree of variation in the light transmission in the nominally 'closed' state enjoy the advantage of not having to be rolled out of the way to allow some light in. It is the aim of the present invention to provide an improvement upon such a device.
• US patent 6371189 to Azoulai provides a roller shutter for a window or doorway wall opening, comprising a plurality of elongate slats coupled together to form a slat assembly, and a winding device overlying the slat assembly for winding and unwinding the slat assembly to a fully-closed position, a fully-opened position, and a partially-opened position with respect to the wall opening.
• the slats are coupled together by flexible coupling links coupled between adjacent slats at both ends of the slats, which permit each slat, when in a fully-opened or partially-opened position with respect to the wall opening, to move linearly away from an adjacent slat in the slat assembly to create a light and air space between the adjacent slats and linearly towards the adjacent slat in the slat assembly to close or restrict the light and air spaces, and angularly with respect to the adjacent slat in the slat assembly to enable the slat assembly to be wound onto or unwound from the winding device. It will be noted (see e.g. Fig.
• Each slat comprises a rotating shaft mounted on the connection elements and an interlocking shaft provided in a position different from that of the rotating shaft, both of which are provided on the respective side faces thereof.
• One end portion of the interlocking shaft is fitted into a guide groove provided in a guide bar so that as the guide bar moves the angle of inclination of slat varies. Therefore, a shutter is rolled up and its storage space is reduced, and the amounts of airflow and light can be adjusted by varying the angle of inclination of the slats.
• Fig. 1 presents prior art
• Fig. 2 presents a side view of the improved shutters of the current invention in its completely closed state
• Fig. 3 presents a side and front view of the improved shutters of the current invention in a partially closed state
• Fig. 4 presents a graph of heat flux vs. temperature difference across a shutter of the current invention, illustrating a relatively large heat insulation value.
• the present invention comprises an improved roller shutter with provision for variable light and air penetration, improved strength, and decreased weight.
• an improved roller shutter comprising a plurality of largely rectangular, hollow main slats slidably hinged on their long edges to largely rectangular perforated connecting slats, said main slats having cavities within them adapted to contain said connecting slats when said roller shutter is in a completely closed state, and said connecting slats containing a plurality of perforations that are exposed when said roller shutter is in a partially open state, thereby allowing light and air to penetrate said connecting slats when said roller shutter is partially opened.
• roller shutter wherein said hollow main slats are filled with an expanding foam selected from a group consisting of: polyurethane foam, isocyanate foam, and silane terminated polymer foam.
• roller shutter wherein said main slats and said connecting slats are produced by roll forming. It is further within provision of the invention to provide the aforementioned roller shutter wherein said main slats and said connecting slats are composed of material selected from a group consisting of: aluminum, steel, bronze, wood, titanium, iron, plastic.
• the open area of the shutters range from at least 20% of the entire shutter area when in the completely open state to 0% of the entire shutter area when in the completely closed state.
• roller shutters comprising steps of : a. roll-forming single-walled connecting slats (202) having hinges
• slats are provided for roller shutters in the form shown in Fig. 2.
• the slats are of two varieties, these being main slats 201,203 and connecting slats 202.
• the main slats are roughly speaking hollow rectangular prisms, with long side (for example) about 1.5m, short side (for example) about 4cm, and thickness (for example) about lcm.
• the main slats have voids within them adapted to contain the connecting slats when the shutters are closed completely; this configuration is shown in Fig. 2 in cross section.
• the connecting slats 202 are pulled out of the main slats 201,203 as shown in Fig. 3b in cross section.
• Holes 204 shown in the front view of Fig. 3a
• the main slats are connected to the conectig slats by means of hinge-like mechanisms 209,210 on the main slats and corresponding hinge 207,208 on the connecting slats.
• the connecting slat hinge 207 disengages from the main slat hinge 210 when the device is closed as in Fig. 2. It will be noted that the connecting slats attach to the main slats along their entire respective lengths, along the long side. Therefore the strength of connection between connecting and main slats will be correspondingly substantial. It will also be noted by those skilled in the art that in the completely closed state (Fig. 2), there will always be at least two walls blocking any heat or force transfer from one side of the shutter to the other, in addition to the insulation value of a filler used to fill the hollow slats. Thus there will be a correspondingly resistance to transfer of heat/cold (high R-value) and high strength.
• the interior cavities 205 of the main slats be filled with a heat insulating and strengthening element such as polyurethane foam.
• foam can be obtained in a form that expands upon contact with air, allowing for easy filling of voids such as the cavities 205 by filling from the open sides of the main slats.
• the 'completely closed state' is characterized by the connecting slats being completely pushed within the main slats with main slats touching one another, as shown in Fig. 2. It should also be understood that in a 'open state' the connecting slats are not completely contained within the main slats, and the main slats are not touching one another, as in Fig. 3. In a 'partially open state' these statements are also true; in a 'completely open state' the connecting slats are completely exposed as in Fig. 3, such that further drawing of the shutter will cause movement of all the slats from their rest positions as a whole. The state of the shutter when the slats have been completely withdrawn and rolled into a containing box or to the ceiling of a garage, for instance, will be called the 'withdrawn state'.
• Fig. 5 a perspective view of a main slat prototype is shown.
• Figs. 6,7 a roll forming assembly is shown that is capable ofproducing the prototype of Fig. 5 at a rate of several meters per second.
• the open area of the shutters when in the completely open state be approximately 20% of the entire shutter area, while the open area ot the shutters when in the completely closed state be approximately Wo oi the entire shutter area.
• the wall thickness of the slats may be thinner than the standard slat wall thickness, an advance allowed by the use of the polyurethane void filling described above.
• Wall thicknesses of about 0.3mm have been used in prototypes produced by roll-forming. Due to this decreased wall thickness a decrease in the relatively expensive wall material (typically aluminum) is effected.
• the diameter of a rolled window-shutter according to the current invention will be substantially smaller than other designs, for example reaching approximately 30cm roll diameter for a 4m length shutter.
• the heat insulation of the device be greater than 0.37 K m /W, a relatively high value considering the small wall thickness of the aluminum used; the large thickness of polyurethane foam ensures the high heat resistance value obtained.
• Fig. 4 where the total heat flux across a shutter is shown as a function of external temperature, where the internal temperature is kept at 0°C (273°K). As the external temperature is increased a linear relation is obtained for the heat flux in W/m 2 , allowing one to use a standard R-value as defined by:
• Q is the total heat flux in W/m 2
• R the insulation value in K m 2 /W
• T the temperature difference across the device in °K.
• This value computed by finite element simulation using the ⁇ 12mm thickness of the device and 0.3mm wall thickness, compares favorably with a value of 0.18 K m 2 /W for 2.5cm thick wood chips or 0.38 K m 2 /W for 2.5cm thickness of vermiculite.
• the device may be entirely produced by means of roll-forming as opposed to extrusion as is the practice currently. This constitutes an important improvement over the current state of the art since roll-forming is less energy intensive and less expensive than extrusion for aluminum although the initial tooling may be more expensive [Roll-Forming Handbook, George Halmos p. 12-2, CRC Press 2006].
• the slats of the current invention Due to the 0.3mm wall thickness of aluminum used in the slats of the current invention, it is estimated that in the closed state a single slat will weigh 152g/m, and the connecting slat 73g/m. When closed, the slats are estimated to weigh about 4.6 kg/m 2 of slat area.
• roller shutters of the current invention may be found suitable as storm shutters.
• Suitability for such applications has been defined by various standards such as UL 2218, for Class 4 wind resistance.
• UL 2218 for Class 4 wind resistance.

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• Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (2)

Family Cites Families (6)

• 2010
  • 2010-06-27 EP EP10747676A patent/EP2449200A1/de not_active Withdrawn
  • 2010-06-27 WO PCT/IL2010/000513 patent/WO2011001426A1/en not_active Ceased

Non-Patent Citations (1)

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