WO2021133182A1 - Moveable awning screen intended for protection from the sun - Google Patents

Moveable awning screen intended for protection from the sun Download PDF

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Publication number
WO2021133182A1
WO2021133182A1 PCT/RS2020/000021 RS2020000021W WO2021133182A1 WO 2021133182 A1 WO2021133182 A1 WO 2021133182A1 RS 2020000021 W RS2020000021 W RS 2020000021W WO 2021133182 A1 WO2021133182 A1 WO 2021133182A1
Authority
WO
WIPO (PCT)
Prior art keywords
screen
cable
spool
pillar
pillars
Prior art date
Application number
PCT/RS2020/000021
Other languages
French (fr)
Inventor
Djordje PETRIC
Original Assignee
Petric Djordje
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to RSP-2019/1679 priority Critical
Priority to RS20191679A priority patent/RS62577B1/en
Application filed by Petric Djordje filed Critical Petric Djordje
Publication of WO2021133182A1 publication Critical patent/WO2021133182A1/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F10/00Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins
    • E04F10/02Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins
    • E04F10/06Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins comprising a roller-blind with means for holding the end away from a building
    • E04F10/0666Accessories
    • E04F10/0681Support posts for the movable end of the blind
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F10/00Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins
    • E04F10/02Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins
    • E04F10/06Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins comprising a roller-blind with means for holding the end away from a building

Abstract

A movable awning screen intended for protection from, above all, the sun, belongs to the field of construction and, in general, belongs to the field of human necessities, that is, to the field of playing courts design. The invention consists of two screens (1, 2), built in the shape of a right triangle having one leg longer than the other, and four hollow pillars (5, 6, 7, 8) one ends of which are firmly coupled to the ground in the corner points of the space to be protected from the sun. The other ends of the pillar (5, 6) and the pillar (7, 8) are tightly and pivotally interconnected by a spool (3, 4) made of aluminum alloy. The other ends of the pillar (5, 8) and pillar (6, 7) are mutually interconnected with the cable (9, 10). Within the pillar (5, 7) a sprocket (18), driven by a synchronous motor (37) supplied with a braking means, is inserted and firmly coupled. Within the pillar (6, 8) a pulley (23) driven by a synchronous motor (38) supplied with a braking means, is inserted and firmly coupled. A cable (33) is firmly connected along the hypotenuse of the triangle shaped screen (1, 2), and cable (34) is firmly connected along the median line above the shorter leg of the triangle shaped screen. The screen (1, 2) is tightly connected to the spool (3, 4) with its shorter leg, and one end of the cables (33, 34) is also firmly connected to the spool (3, 4). While unwinding the screen (1, 2), the motor (38) winds the cable (33) onto the reel (29) pulling the screen (1, 2), while the motor (37) holds the screen (1, 2) wounded on the spool (3, 4). Winding uses the reversed process in order to keep the screen (1, 2) flat during the winding on the spool (3, 4).

Description

MOVEABLE AWNING SCREEN INTENDED FOR PROTECTION
FROM THE SUN
TECHNICAL FIELD
The object of the present invention generally relates to the field of construction, and more closely belongs to the field of buildings or structures intended for special purposes such as roofing. Secondarily, the subject matter of the present invention, generally speaking, may belong to the field of human necessities, that is, to the field of sports, games and amusement and more closely to the field of design or layout of playing courts.
According to the International Patent Classification (IPC), the subject of the invention is designated and classified by the basic classification symbols:
E04F 10/04 - Sunshades with flexible canopy materials;
E04F 10/00 - Sunshades; Awnings;
A63C 19/00 - Design or layout of playing courts, rinks, bowling greens or areas for water-skiing; Covers therefor;
A63C 19/12 - Removable protective covers for courts, rinks or games pitches or the like.
TECHNICAL PROBLEM
The technical problem to be solved by the present invention can be formulated by the following: how to construct an awning assembly intended for area protection, which, by means of a shadow-casting system, would use the screen material as a covering or protection in normal weather conditions, i.e. against the effects of elements, e.g. the sun which emits heat and UV radiation, light rain and the like, where the awning would have the ability to completely shade and protect open areas, especially sports fields, open warehouses, restaurants and such, with the awning screen having the ability to be wrapped by using a winding mechanism or unwrapped by using an unwinding mechanism, where the awning screen assembly would be of simple construction and high efficiency when compared to known solutions, would be relatively small in weight and stable, efficient and easy to operate without resistance or jamming, practical and easy to install, maintain and operate, aesthetically pleasing in appearance, with long service life, economically viable and which would meet the standards for constructions of this type and purpose.
PRIOR ART
A number of solutions are known in the area of closing the open areas by covering with protective screens where, by means of the shadow-casting system, the screen would be used as a covering or a protection in case of common weather conditions, i.e. as a protection against the effects of the elements, mostly the sun. The term “closure of open areas” considers the use of an overlay element that would have the ability to cast a complete shadow and provide the protection from the sun of, especially, sport courts, restaurant gardens, terraces, etc. Nowadays, closing of the open areas is done by using various structural solutions such as foils, awnings, pergolas, roofs, shutters, etc. Closure of the open areas is necessary due to the effects of UV radiation which are 150 times stronger in the noon than in the morning and evening hours.
The closure of the premises (gardens, terraces, etc.) with transparent PVC foil allows their use even when that would usually be inconceivable, during the autumn and winter months. The main purpose of using a transparent foil is to shield from the effects of wind, dust, rain and snow. Due to its resistance and low thickness, transparent PVC film has the ability to introduce a temperature difference of up to 10 degrees without additional heating. Additionally, it features a minimal spatial footprint when lowering and lifting so that the premises do not lose their intended functionality.
Pergolas are considered one of the most modern and practical solutions for sun and precipitation protection. Due to their characteristics and prestigious appearance, pergolas have become an increasingly common system of protection against external influences for gardens of restaurants and cafes, as well as for the terraces of homes. Thanks to the possibility of undisturbed water drainage through its own gutter system and the premises illumination through utilization of LED lighting mounted on aluminum profiles, pergolas have occupied an important place among the sun and precipitation protection systems. Strong aluminum profiles, powder coated, statically solid and stylishly designed, make the room not only safe from precipitation and UV radiation, but also beautiful and modern. Pergolas differ amongst themselves according to the length of the canvas projection and according to the shape of the construction made out of PVC. They can be either mounted on the structure or freestanding. Pergola is powered by an electric motor and a remote control.
Out of all of the above-mentioned known solutions for closure of open spaces and for casting shadows as a means of protection, awnings are widely adopted as providing a perfect protection from the sun. Controlling an awning is simple and can be done manually by the use of crank, or can be alternatively driven by an electric motor operated through a remote control unit. In general, three types of awnings are known:
(a) awnings in which the screen is being wound around a rotating tube during lowering, which use several fixed tubes for winding and have a front profile which slides within two guide rails;
(b) awnings in which the screen is being folded during lowering, which utilize a system with multiple counterweights located below the guide rails in which the awning screen is retained and through which it can slide by means of a motorized actuation system;
(c) awnings in which, during lowering, the screen is being folded by a mechanism that raises the awning screens which utilizes a system with multiple counterweights located above the guide, where the counterweights are interconnected through a mechanism for raising the awning screen that can slide within the guide rails by means of a motorized actuation system.
Amongst the awning systems, following sub-types of awnings are known; articulated awnings, cassette awnings, freestanding awnings, awnings mounted on fixed structures, vertical awnings, zip systems. All of these variants are limited in size having the width of 225/300cm to 700/1, 500cm and a projection or reach of 150/300cm to 350/700cm.
There are a number of documents in the patent and non-patent literature that may be considered relevant to the solution that will be presented here. The prior art is constituted out of the following documents:
Patent US9126093 (B1), which became available to the general public on the 8th of September 2019, titled “System for retractable tennis court shading device” discloses the invention that consists out of three support pillars firmly connected to the ground along each of the tennis court longer sides, and two support pillars firmly connected to the ground along each of the tennis court shorter sides. The pillars’ other ends are connected by a frame. Pillars are placed at an angle in relation to the tennis court and above the tennis court itself. With the help of steel cables, the retractable sun blinds are movably connected to the frames. Disadvantage of this invention is that both, proposed and alternative solutions, must require technical knowledge in the relevant field in order for the invention to be practically applied.
Patent application DE3721738 (A1), which became available to the general public on the 21st of January 1988, titled “ Roofing for open spaces” discloses an invention consisting of masts that are placed along the shorter sides of the space that is to be protected and connected to the ground with one of their ends. Pulleys, over which cables used for retracting and extending the curtains run, are tightly affixed to the other ends of the masts and placed at the height of the mast which is suitable for manual rotation. The curtains are housed in rails that may have wind restraining cables at their beginnings and ends, and the cables may also be connected to the ground. By turning the pulleys located on the one side of the covered space using a levers mounted on them, cables that run over the pulleys are being wound on them. This is how the curtain is extended. By turning the pulleys on the opposite side of the roof, the curtains are retracted. The disadvantage of this invention is that stronger forces are required to expand and collect the curtain and that more than one person is required to do this job.
Patent application FR2557184 (A1), which became available to the public on the 28th of June 1985, titled “Device for covering a leisure area or a meeting place" discloses an invention which consists of a plurality of pillars that bound the place which is to be protected, where the pillars are tightly coupled to the ground with one of their ends and are connected to each other at their other ends by transverse beams. Pillars higher than the other ones are placed and firmly connected to the ground in the middle of longer sides to be protected. These pillars are transversely connected to the beam. This beam divides the space into two equally sized areas. These surfaces are overlaid by two separate canvases that are wrapped in a roll and placed on the lateral shorter sides of the covering surface, parallel to the transverse beam. When these canvases are stretched, they are simultaneously supported by cables latched to the transverse beam and lateral shorter sides. The disadvantage of this invention is that the space to be protected is limited on all sides by multiple pillars that may interfere with the game of tennis.
Patent application KR20090122952 (A), which became available to the general public on the 1st of December 2009, titled “Retractable awning ” discloses an invention that can be retracted and extended through the use of motor. It consists of two pillars that are firmly connected to the ground and are placed at an angle which is opposite to the direction of canvas tension so that the pillars can withstand a greater tensile force. A housing that receives the canvas, having the shape of a hollow cylinder, is placed at the other end of the awning. Canvas is connected to the pillars by cables. One motor is used for awning extension and the other one for awning retraction. The motors are controlled by a control unit that synchronizes their operation with balanced forces at both ends of the awning. Synchronized motor operation provides the required tensile load induced on the awning which is within the predetermined values. The disadvantage of this awning is that only smaller areas can be covered, and that the canvas shrinks due to tension in the middle because only the ends of the canvas are joined in the tensile direction. Over time, this reduces the area that should be protected.
In patent RS 53464 (B), which became available to the public on 31.12.2011, titled “Folding conservatory awning-roof, an invention is presented which consists of two or more leading bars having an open top and within which sliders are moved, where one of the multiple sliders, not counting moving slider, must be fixed. The moving slider is connected to a moving system, made up of a motor tube on the slides on which the torsion spring is mounted, for balancing. The ends of the spring are adapted for a rotary ring. The ring is located in the grooves of the engine pipes. The sliders are connected to the roof elements which are connected to the spacer levers via screws. Movement of the roof elements is performed through the lower part of the garden awning, in combination of linear and rotary movements of the roof elements to open and close the garden awning.
Patent RS 56466 (B), which became available to the general public on the 31st of January 2018 titled “Overhead construction with a holding device” discloses an invention that consists of a supporting profile one side of which is firmly connected to the structure, thus making the construction of the roofing consoled. The profile bears panels made of glass on the other side. Panels have lateral notches etched into them. A notch can be made in only one part of the panel. These are positioned within the supporting surface of the support profile arm. The notches serve the purpose of inserting the appropriate L-shaped safety element. This ensures a secure positioning of panel boards in the roofing structure. The panel board may be laminated and having at least two individual panels with at least one middle layer.
Safety elements are inserted into the notches to mechanically secure and guide the panels. If the panel plate gets pulled, the safety element will rest on the edge of the supporting arm and, if necessary, on the edge of the glass, thereby holding the roofing plate. The lateral slipping of safety elements was avoided by the use of bounding elements.
In addition to the relevant documents found in the available patent literature, the most recent state of the art is also represented by the non-patent documentation found on the following sites: https://enerqa.hr/tende/ where a stand-alone awning is presented in the form of a triangle screen supported by three masts, two of which support a tube to which one side is attached, and where in the third pillar an engine is housed that allows the awning to be opened and closed. These screens can be mutually combined for the protection of larger areas. The disadvantages of this awning screen are reflected in that the sides of the screen are stretched so that the surface of the space to be protected is small, and that the screen stretches more and more over time. https://www.prestiqe.co.rs/tende/modeli/ features a number of different awnings such as: awnings with movable side arms that can be actuated by a motor or a crank, awnings with articulated arms intended for protection of larger surfaces, modular awnings for spanning larger widths as they can be laterally interconnected, semicassette modular awnings that can be mutually joined, cassette awnings that can be angle-adjusted, new generation movable sail-type awnings made in quadrilateral shape and capable of protecting larger areas from the sun where the sail rests on one end of four masts having their other ends firmly coupled to the ground. https://www.qooqle.com/search?sxsrf=ACYBGNQVtF2mylcqM- DmAKdWVFe7ac Miw:1574619752674&g=tende+za+velike+poyr%C5%A1 ine&tbm =isch&source=univ&sa=X&ved=2ahUKEwiVtY7Yu4PmAhUOI4sKHepuAsqQsAR6BA qKEAE&biw=1920&bih=937#imarc=-V4hqJdJ6EKm M: presents several different freestanding screens, mainly built in the parallelepiped shape supported by columns having one end firmly connected to the ground and the other end connected to a transverse screen carrier that can be retracted and extended. The screen retraction and extension are solved in various ways such as employing sliding mechanisms that fold and unfold, as well as with ropes or sliders placed on the sides of the surface to be protected. https://www.roltek.eu/more-products/sun-shade-sails/#square4sun features a number of different shades that open and close with the help of a wireless remote control or smartphone. These are designed so to create pockets on the shades, even when in heavy showers or in continuous rain.
SUMMARY OF THE INVENTION
Having an active sun protection on sport courts in cases of extreme weather conditions, such as strong winds, is not necessary because in such weather conditions sport matches are not played. Also, it is neither necessary nor desirable to have any curtains or screens present at a time when the conditions are favorable for play, such as morning, evening and night, as the piayers at that times of the day want to have a view of the open sky. In other words, having a protective screen is essential only when the intensity of the sun is uncomfortable during the middle of the day, and with no stronger wind presence. The same is the case with the gardens of catering establishments.
The construction of the invention consists of four hollow polygonal pillars whose cross-sections may vary depending on the height, or may be the same. The pillars are made of structural steel having good mechanical properties. For pillars with variable cross-section, the cross-sectional area at the one end of the pillar is larger than the cross-sectional area at the other end of the pillar and changes continuously. The pillars are firmly connected to the ground with their ends having a larger cross- section, and these are usually placed in the apexes of the area surface that is to be covered, or can be placed cross-wise one to another when protecting a much larger surface is desired. The other ends of the pillars are mutually interconnected by cables on their longer sides covered by the screen, and the shorter sides of the pillars are pivotally and firmly connected with spools built of lightweight aluminum alloys of good mechanical properties. Transmission mechanisms, intended for unwinding and winding of the screen, are housed inside of diagonally opposite pillars and firmly affixed to them. These mechanisms consist of the upper mechanism assembly located under the hood of the pillar, and the lower mechanism assembly located in the lower half-part of the pillar placed at the level matching the inspection opening. Mechanisms can be operated manually or with the help of motors that are supplied with braking means. The motors can also be controlled through a control unit which synchronizes the operation of the motors with each other so that the screens covering the court are always tightened.
The screens are built in the form of a right triangle having one leg much longer than the other leg. The shorter leg of the screen is tightly coupled along a spool made in the form of a beam having a polygonal or circular cross-section. The ends of the spool are tightly connected to the sleeves, which are tightly coupled to the shafts, which are tightly and pivotally connected to the ends of the pillars having a smaller cross-section. According to the invention, the screens are arranged in such a way that their hypotenuses are kept parallel to each other, and that their shorter legs are placed opposite each other so that the screens, when extended, simultaneously cover the surface in the shape of parallelogram. The hypotenuse of the triangular screen and the median line of the triangular screen above the shorter triangle leg are firmly connected to the cables intended for extending and retracting the screen. One end of the cable is tightly coupled to the spool to retract the screen. The other end of the cable is tightly coupled to the transmission mechanism so to extend the screen and to hold the screen down when retracting so that the screen is always tightened. A transmission mechanism for retracting the screen is a sprocket gear driven by a motor provided with a braking means, and a transmission mechanism for extending the screen is a pulley also driven by a motor provided with a braking means.
The motors are controlled by a control unit that synchronizes the motor operation so that the screen is optimally tightened at all times. The term optimal tension considers a degree of tensile force that allows for a minimal deformation due to gravity without, at the same time, causing an excessive wear due to the stretching of the cables and materials from which the screen is made of. At the same time, such tightness prevents the formation of folds when retracting the screen and winding it on the spool.
The essence of the invention is reflected in the stresses suffered by the screens during retracting, extending and regular use. In order to minimize or avoid stretching and overlapping of the screens built in the shape of a right triangle, the screen is retracted, extended and used through the means of cables, and the screen itself is the widest when being reeled on the spool. The cables are tightly connected to the screen along the hypotenuse and along the median line above the shorter leg of the right triangle shaped screen. The forces that exist while extending and retracting the screen only arise in the cables because the screen tightness is predefined through the tight connection between the screens and cables. When extending or retracting the screen, the longer leg of the screen is free and, as such, does not suffer any stresses and does not deform while in operation. When winding the screen on the spool the cables are stacked side by side as bends of a cylindrical spring, so that the cables do not deform the screen whose width gets reduced when being reeled on the spool.
When compared with the screens of the prior art, the advantages of a moveable screen intended for the protection from, above all, the sun, are:
- effective and easy-to-operate screen that runs without jams and resistance; - long screen life-span;
- the screen has the ability of adjusting it’s overall dimensions depending on the specific needs;
- construction is simple with no unnecessary elements that would interfere with the game of tennis;
- the construction of the supporting elements is stable and light;
- high utilization rate and low screen mass;
- aesthetically pleasing.
SHORT DESCRIPTION OF DRAWINGS
In order to facilitate easier understanding of the present invention, as well as to showcase how it can be implemented in practice, the Applicant refers to the attached drawings in which:
Figure 1 presents the invention with extended screens in axonometric view;
Figure 2 presents the invention shown in Figure 1 having screens partially extended;
Figure 3 presents the invention shown in Figure 1 having screens fully retracted;
Figure 4 presents the pillar housing a mechanism for screen retracting in axonometric view;
Figure 5 presents a portion of the pillar shown in Figure 4 partially cross- sectioned trough a smaller diameter and in axonometric view;
Figure 6 presents a top plan view of the pillar shown in Figure 4 without a lid;
Figure 7 presents the portion of the pillar where the sprocket gear is located at next to the inspection opening in partial cross-section and in axonometric view;
Figure 8 presents the portion of the pillar having the smaller cross-section in which a pulley and a shaft portion for linking to the spool are housed; Figure 9 presents the portion of the pillar housing the pulley next to the inspection opening in partial cross-section and in axonometric view;
Figure 10 presents a top plan view of the pillar shown in Figure 8 without the lid.
DETAILED DESCRIPTION
The movable screen intended for protection from, above all, the sun, refers to the screen 1 , 2 for covering larger open areas, especially sport courts, in order to provide protection against the sun or minor atmospheric precipitation. Covering larger open areas is essential when the intensity of the sun is uncomfortable. This is in the middle of the day when the effects of UV radiation are 150 times greater than that in the morning or evening. The invention can be observed as a single module, since for larger terrains more than one of such modules may be installed side by side.
The invention basically consists of two screens 1 , 2 which are built in the form of a right triangle where one triangle leg is longer than the other triangle leg, and of four hollow vertically mounted polygonal or round pillars 5, 6, 7, 8, most preferably made out of steel. The cross-section of pillars 5, 6, 7, 8 may be identical lengthwise, or may vary continuously from one end to the other. As part of the invention, pillars 5, 6, 7, 8 are firmly connected to the ground with one of their ends having a larger cross-section. A solid connection of pillars 5, 6, 7, 8 to the ground can be achieved by using concrete foundations or by bonding them to concrete foundations with multiple anchor hooks, most preferably with three or four anchor hooks. Inspection opening 22, 32 is arranged at the height of each pillar 5, 6, 7, 8, that the person can access when standing on the ground.
The other ends of pillars 5, 6, and pillars 7, 8 are tightly and pivotally connected to the spool 3, 4 built out of aluminum alloy having a polygonal or circular cross- section. The material of which the spool 3, 4 is made is above all lightweight, has good mechanical characteristics and high resistance to corrosion. The other ends of pillars 5, 8 and pillars 6, 7 are interconnected by cable 9, 10. Cable 9, 10 is made out of twisted strands of steel wrapped around a core that is also built out of steel. A sprocket 18, driven by a synchronous motor 37, is inserted into and firmly connected to the pillar 5, 7. The motor 37 is provided with a braking means. A pulley 23, driven by a synchronous motor 38, is inserted into and firmly connected to the pillar 6, 8. The motor 38 is also provided with a braking means.
At the other end of the pillar 5, 7 having the smaller cross-section, by means of the support 27, the shaft 15 is firmly and pivotally connected to the pillar 5, 7. The shaft 15 is rigidly connected to the outside of the pillar 5, 7 by a bushing 14, which is firmly connected to one end of the spool 3, 4. The shaft 15 within the pillar 5, 7 is, on the other hand, firmly connected to the gear 16 of the sprocket 18 over which the chain 17 runs.
At the end of the pillar 5, 7 having a larger cross-section, within the pillar 5, 7 and above the inspection opening 22, a shaft 19 is firmly and pivotally connected to the pillar 5, 7 by means of the U-shaped bracket 35. Within the pillar 5, 7 the shaft 19 is connected to the motor 37 through the port 24 Gn one of it’s ends, and to the gear 20 of the sprocket 18. The gear 20 of the sprocket 18 is driven by the motor 37. Outside of the pillar 5, 7 a bushing element 21 is firmly connected to the shaft 19, where channels 36 are provided in the bushing element 21 by means of which the gear 20 of the sprocket 18 can also be operated manually by using a crank. The pillar 5, 7 is covered and tightly coupled with the cover 13 at the top, i.e. on pillar’s end having the smaller cross-section.
At a smaller cross-section part of the pillar 6, 8, the shaft 15’ is rigidly and pivotally coupled to the pillar 6, 8 by the support 27. A bushing 14 is tightly connected to the shaft 15’ outside the pillar 6, 8. The other end of the spool 3, 4 is firmly connected to the bushing 14. The reel 26 of the pulley 23 is rigidly and pivotally connected within the pillar 6, 8, relative to the axis of the shaft 15’ and at an angle a, and most preferably at an angle a = 80 ± 10 degrees. A cable 33 is passed over the reels 26 by which the screen 1, 2 is extended and held tight during the execution of the retracting process.
At the larger cross-section of the pillar 6, 8 and above the inspection opening 32 the shaft 28 of the pulley 23 is rigidly and pivotally connected within the pillar 6, 8. With the shaft 28 a reel 29 around which a cable 33 is being wound is rigidly coupled and the port 39 for establishing the connection to the motor 38 that drive the reel 29, that is the pulley 23. A bushing element 30 is tightly affixed to the shaft 28 outside the pillar 6, 8, where in the bushing element channels 36 are provided by means of which the pulley 23 can be manually operated through the usage of crank.
The screen 1 , 2 is made of plastic foil having high strength and low thermal conductivity. It is difficult to tear, and is extremely resistant to all weather conditions such as: UV rays, salt, rain, etc. The screen 1, 2 is made in the shape of a right triangle having one leg longer than the other. Along the hypotenuse of the screen 1 , 2 made in the form of a right triangle, a cable 33 is tightly connected, and along the median line of the screen 1 , 2 above the shorter leg of the right triangle, a cable 34 is tightly connected. The cable 33, 34 can be made of steel, PVC or nylon. One end of the cable 33 is firmly connected to the end of the spool 3, 4 at the point of junction of the shorter leg and the hypotenuse of the spool 1 , 2. One end of the cable 34 is firmly connected to the middle of the spool 3, 4. The other end of the cable 34 is firmly connected to the cable 33 at the point of junction of the longer leg and the hypotenuse of a right triangle formed by the screen 1, 2. The other end of the cable 33 is thrown over the reel 26 of the pulley 23 and firmly connected to the reel 29 on which it is wound or unwound.
The screen 1 , 2 is along the entire length of the shorter leg tightly coupled to the spool 3, 4 which is of circular or polygonal cross-section. As a part of the invention, the screen 1, 2 is relative to other screen arranged in such a way so that their hypotenuses are placed parallel to each other, so that the screen 1 , 2 covers the surface in the shape of a parallelogram.
The screen 1 , 2 is unwound, or opened, by a motor 38 provided with the braking means and is wound, or closed, by a motor 37 also provided with the braking means. When being unwound the motor 38, using a cable 33, 34, pulls the screen 1, 2, and the motor 37 holds it on the spool 3, 4 so that the screen 1 , 2 is tightened all the time. When being wound, the screen 1, 2 is held tight by the cable 33, 34 and the braking means of the motor 38, and is wrapped by a sprocket 18 driven by the motor 37.
The essence of the invention is reflected in the fact that the material, of which the screen 1, 2 is made of, does not suffer any loads during the winding, unwinding and use, and that the cables 33, 34 bear all the loads. The material of which the screen 1 , 2 is made of does not stretch and does not overlap. This is achieved by the process of tightly tying the cable 33, 34 to the canvas screen 1 , 2 by tightening the rope 33, 34 and the canvas is being only held.
During the process of unwinding, winding and use, the longer curtain of the curtain 1 , 2 is free, that is, the longer leg does not suffer any stresses except that out of its own weight. The screen 1, 2 supports its own weight because during the manufacture of the screen 1 , 2 the longer leg is made to coincide with the edge of the material which is laterally reinforced at the factory. Cables 33, 34 are, when winding the screen 1 , 2 on the spool 3, 4, being stacked side by side as bends of a cylindrical spring, so that the cables 33, 34 do not deform the screen 1 , 2 because they do not wind up over each other. An additional advantage is that the width of the screen 1 , 2 is reduced by winding the spool 3, 4. Width reduction of the screen 1, 2 is enabled by the triangular shape which is being shrank lengthwise during the winding process, which reduces the possibility of overlapping and stretching, which causes the screen 1, 2 to deform and, thus, reduces the life-span of the material making up the screen 1 ,2.
The motors 37, 38 are controlled by a control unit that synchronizes the operation of the motor 37, 38 in such a way that the screen 1 , 2 is optimally tightened at all times. Optimal tension considers the degree of tensile force that allows for minimal deformation due to gravity without, at the same time, causing excessive wear due to the stretching of the cables 33, 34 and the materials of which the screen 1, 2 is made of. At the same time such tightness prevents the formation of folds when winding the screen 1 , 2 on the spool 3, 4.
The method of operation, according to the invention, is simple and obviously stems out from the previous description and drawings so it does not need to be separately described in detail. However, what is important to note is that the operation of the motor 37, 38 must be synchronized, and that the motor 37, 38 is operated via a remote control system by an authorized operator having a control mechanism. In the optimal version, and according to the invention, the control system would be connected to a meteorological sensor. In the event of an incoming storm, such a sensor would first signal the operator on the need for winding the screen 1 , 2 and, in the extreme case, it would initiate an automated safety procedure for winding the screen.
INDUSTRIAL OR OTHER APPLICATION OF THE INVENTION
The method of application of the invention derives in an obvious manner from the foregoing, that is, for the commercial use of the claimed invention no specific knowledge, instructions or experience is required to successfully apply the invention. Only the knowledge in the subject field of art that an average expert possesses are considered required and sufficient for the successful application of the present invention based on the description given. The inventor has successfully verified all the structural and functional characteristics of the invention on the made prototype, and performed the numerical analysis of the elements bearing the greatest amounts of stress of the movable screen 1 , 2 intended for protection from, above all, the sun.
An authorized institution (Faculty of Mechanical Engineering - Belgrade) carried out a numerical analysis of the elements of the invention bearing the greatest amounts of the load. The analysis were carried out in order to verify the load-bearing capacity of non-standard elements, especially large length spools 3, 4, as well as to find possible weaknesses in the structure that would be eliminated through an additional geometry optimizations. The calculation was made for the most extreme conditions of use, and the loads were applied in such a way so that the individual element carries the complete load, i.e. that the other elements that it is in contact with carry nothing.
The spool 3.4 is the non-standard element that bears the greatest amounts of load due to its length, amongst other things. In case where the spool 3, 4 is the element which is under the greatest amounts of stress (screen 1, 2 fully reeled), the maximum elastic deformation of spool 3, 4 (taking into account the weight of spool 3, 4) is about 178 mm, which is within acceptable limits because the value is deformation about 1% of the total length of the coil 3, 4. Inspection of the selected standard elements concluded that their degrees of safety are higher than what’s required, i.e. that in some cases elements having smaller dimension could also be adopted.
Also, any structural improvements or modifications that would be within the scope of the sunscreen assembly shown and that would be intended to improve it functionally are considered to be covered by this application.

Claims

1. A movable awning screen intended for protection from, above all, the sun, consists of four hollow pillars (5, 6, 7, 8) that are tightly coupled to the ground with one of their ends and where other ends of the first pair of pillars (5, 6) and second pair of pillars (7, 8) are mutually tightly and pivotally interconnected by a spool (3, 4), where other ends of the first pair of pillars (5, 8) and second pair of pillars (6, 7) are mutually interconnected by a cable (9, 10), where a pulley (23) is tightly coupled within the cavity of the one pair of diagonal pillars (6, 8) and where a sprocket (18) is tightly coupled within a cavity of the second pair of diagonal pillars (5, 7), where motors (37, 38) having breaking means, that drive the pulley (23) and sprocket (18), are firmly coupled within pillars (5, 6, 7, 8), characterized by, that a screen (1 , 2) is built in the shape of a right triangle having one leg longer than the other, that a first cable (33) is tightly fixed along the hypotenuse of the screen (1 , 2), and that a second cable (34) is tightly fixed along the median line above the shorter leg of the screen (1 , 2), that one end of the first cable (33) is tightly fixed to the spool (3, 4) at the junction point where longer leg and hypotenuse of the screen (1 , 2) meet, that one end of the second cable (34) is tightly fixed to the middle point of the length of the spool (3, 4), that the second end of the second cable (34) is tightly fixed to the first cable (33) at the junction point where longer leg and hypotenuse meet, and that the other end of the first cable (33) is placed over a first reel (26) and tightly coupled with a second reel (29) of the pulley (23).
2. The movable awning screen intended for protection from, above all, the sun, according to Claim 1, characterized by, that the screen (1, 2) is built from the material having it’s lateral edge coincide with the longer leg of the screen (1, 2), and that the shorter leg of the screen (1, 2) is firmly coupled to the spool (3, 4).
3. The movable awning screen intended for protection from, above all, the sun, according to Claims 1, 2, characterized by, that within the scope of the invention screens (1, 2) built in the form of the right triangle are placed in such a way that their hypotenuses are mutually parallel, and their shorter legs are placed one against the other so that screens (1, 2) simultaneously cover the surface in the shape of a parallelogram.
PCT/RS2020/000021 2019-12-26 2020-12-24 Moveable awning screen intended for protection from the sun WO2021133182A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
RSP-2019/1679 2019-12-26
RS20191679A RS62577B1 (en) 2019-12-26 2019-12-26 The movable curtain for protection, above all, from the sun

Publications (1)

Publication Number Publication Date
WO2021133182A1 true WO2021133182A1 (en) 2021-07-01

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RS (1) RS62577B1 (en)
WO (1) WO2021133182A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2557184A1 (en) 1983-12-22 1985-06-28 Coupiac Andre Device for covering a leisure area or meeting place
DE3721738A1 (en) 1987-07-01 1988-01-21 Gerhard Fabritz Roofing for open spaces
US7472739B2 (en) * 2004-10-29 2009-01-06 Pt Tech, Inc Shade structures
KR20090122952A (en) 2007-02-20 2009-12-01 다니엘 커틀러 Retractable awning
US9126093B1 (en) 2013-02-07 2015-09-08 Atlantic Recreation, Inc, ; System for retractable tennis court shade device
US9528313B1 (en) * 2015-09-30 2016-12-27 Nathan Dhilan Arimilli Non-intrusive, adaptive tracking and shading device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2557184A1 (en) 1983-12-22 1985-06-28 Coupiac Andre Device for covering a leisure area or meeting place
DE3721738A1 (en) 1987-07-01 1988-01-21 Gerhard Fabritz Roofing for open spaces
US7472739B2 (en) * 2004-10-29 2009-01-06 Pt Tech, Inc Shade structures
KR20090122952A (en) 2007-02-20 2009-12-01 다니엘 커틀러 Retractable awning
US9126093B1 (en) 2013-02-07 2015-09-08 Atlantic Recreation, Inc, ; System for retractable tennis court shade device
US9528313B1 (en) * 2015-09-30 2016-12-27 Nathan Dhilan Arimilli Non-intrusive, adaptive tracking and shading device

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RS20191679A1 (en) 2021-06-30
RS62577B1 (en) 2021-12-31

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