WO2021116992A1

WO2021116992A1 - Roof device for a canopy

Info

Publication number: WO2021116992A1
Application number: PCT/IB2020/061806
Authority: WO
Inventors: Thomas VERVISCH; Stijn Colpaert; Bart Abeel
Original assignee: Renson Sunprotection Screens
Priority date: 2019-12-12
Filing date: 2020-12-11
Publication date: 2021-06-17
Also published as: BE1027851A1; EP4073326A1; BE1027851B1

Abstract

A roof device for a canopy. The roof device comprises a panel device and a screen device, wherein the screen device is located below the panel device. The panel device comprises a plurality of stackable panels (512) that are movable between an open position and a closed position, with the panels forming a substantially waterproof roof in their closed position. The screen device comprises at least one screen (532) which is movable between an open position and a closed position, wherein the screen in its open position is substantially invisible and wherein the screen in its closed position substantially completely covers the panels. A water drain is present underneath the panels and above the screen. Such a roof device increases the possible configurations in terms of light transmittance and/or waterproofness and combines in particular the advantages of a panel device with a screen device.

Description

Roof device for a canopy [0001] Technical field

[0002] The invention is in the field of roof devices for retractable roofs. In particular, the invention provides for a roof device comprising retractable roof panels. The invention also relates to a canopy comprising the roof device.

[0003] State of the art

[0004] A terrace canopy is a structure typically made up of columns and beams that can be mounted freestanding or on a facade. A roof is then attached to or on top of the beams. This may be a fixed roof, but in modern housing construction there is an increasing demand for retractable roofs, for example, retractable flat roofs; i.e. roofs whose surface area runs nearly horizontally, without an inclination. The roof infill of a retractable roof can, for example, consist of a rollable fabric or screen, slats that rotate around their axis and may also be retractable, or segments that can slide over one another. The segments may be panels that are partly made of (layered) glass or plastic, such as PC or PMMA. Depending on the choice of material, the light transmittance and robustness of the roof can be tailored to the desired application.

[0005] However, existing roof infill systems typically have the following problems:

- An inclined Tollable fabric has a risk of formation of pockets of water and cannot handle snow loads. A relatively high angle of inclination is required for water drainage (+/- min 8°). Furthermore, only limited infill options exist and there is no flexibility to change the aesthetics of the infill. The fabric also gets dirty easily.

- Pivotable and/or retractable slats are not translucent (translucent glass slats are limited in the number of pieces possible in a canopy). Furthermore, only limited infill options exist and there is no flexibility to change the aesthetics of the infill. The underside feels characteristically chilly.

- A retractable panel roof typically contends with problems related to inclination and curvature. It is usually not translucent. Furthermore, there is usually only one limited infill option and there is no flexibility to change the aesthetics of the infill. The underside feels characteristically chilly.

- A retractable panel roof with fabrics is not waterproof and cannot withstand snow loads. There is a risk of pocket formation and soiling of the fabric.

- A retractable glass roof has a visible inclination and is not sunproof. Furthermore, there is usually only one limited infill option and there is no flexibility to change the aesthetics of the infill.

- A fixed canvas span roof is not a movable roof infill and is not translucent.

[0006] Other shortcomings of modern retractable flat roofs are splash/waterproofness and water drainage. The connection between adjoining panels may sometimes be limited, creating openings and allowing rainwater to leak through the roof. The dirty rainwater may soil both the underside of the roof and the underlying terrace. The risk of faulty connection increases with frequent opening and closing of the roof, for example when dirt or leaves get caught between the panels. Good water drainage is particularly difficult to achieve for completely flat roofs where water cannot drain away naturally. Stagnant water may exert pressure on the roof surface due to formation of pockets of water, with the risk of damage, local collapse or leakage. A similar problem may occur with snowfall, where the roof will be under heavy loads for a long time followed by local accumulation of melting snow water. The retraction of a wet roof to open it may also cause all the dirty water to fall onto the underlying terrace.

[0007] Therefore, there is a need for a roof device that offers a solution to one or more of the previous problems.

[0008] Description of the invention

[0009] The purpose of the present invention is to solve, or at least partly solve, one or more of the aforementioned disadvantages of flat roofs.

[0010] To this end, the current invention concerns a roof device for a canopy. The roof device comprises a frame provided with a pair of first beams which are located opposite one another; a panel device fixed onto the frame, wherein the panel device comprises a plurality of stackable panels slidable between an open position and a closed position, wherein the panels form a substantially waterproof roof in their closed position; and a screen device fixed onto the frame, which device is located underneath the panel device, wherein the screen device comprises at least one screen movable between an open and a closed position, wherein the screen in its open position is substantially invisible, and wherein the screen in its closed position covers the panels substantially completely, wherein at least one, preferably both, of the first beams are provided with a rail system configured for the guidance of the panels between their open and closed positions; a screen guide system configured for the guidance of the screen between its open and closed positions; and at least one channel arranged for the collection of precipitation discharged from the panel device, which is located between the rail system and the screen.

[0011] Such a roof device has an increased number of possible configurations in terms of light transmission and/or waterproofness and in particular combines the advantages of a panel device and a screen device. Specifically, the following configurations are possible:

- Both the panel device and the screen device are open such that the roof device is maximally open. There is a lot of light incidence and sufficient ventilation possible.

- The panel device is closed and the screen device is open. The roof device is waterproof and in itself determines the light transmittance. In the case of a glass panel device, there is sufficient light incidence as the screen device is still open.

- The panel device is open and the screen device is closed. The screen device then acts as a sunshade, while there is still sufficient ventilation given the open position of the panel device.

- Both the panel device and the screen device are closed such that the roof device is both waterproof and sunproof.

If necessary, the roof device may also allow further positions wherein the panel arrangement and/or the screen arrangement are situated between their open position and closed position. This again increases the options to obtain the desired light transmittance and/or waterproofness. [0012] In addition, both the rail system, the screen guide and the gutter are integrated into one of the first beams, resulting in a compact roof device. In addition, a water drain is provided on at least one side, preferably both sides of the panel device such that incident precipitation can be diverted to the frame without thereby impacting on the screen device, possibly causing damage, for example damp spots.

[0013] In an embodiment, the gutter has a bottom and a raised wall, wherein the top of the raised wall is situated above the screen in the closed position of the screen. The screen guide is preferably integrated into the bottom or raised wall of the gutter. A gutter formed by an L-shaped profile is easily applicable in a roof device for a canopy. The integration of the screen guide avoids the need to attach a separate element to the gutter using fastening means (e.g. bolts or screws), which fastening means can cause damage to the gutter (e.g. a perforation).

[0014] In an embodiment, the rail system comprises one or more tracks in a first of said first beams and one or more corresponding tracks in a second of said first beams, wherein each panel is guided on both sides in one of said one or more tracks and one of said one or more corresponding tracks. The panels are therefore guided on both sides in tracks incorporated in the first beams. This contributes to a compact design with a minimum of necessary components.

[0015] In an embodiment, the screen guide comprises a first screen guide in a first of said first beams and a corresponding second screen guide in a second of said first beams, wherein the screen is guided on both sides in the screen guide and the corresponding screen guide. The screen is thus guided on both sides in screen guides incorporated into the first beams. This contributes to a compact design with a minimum of necessary components. As already described above, it is advantageous if the screen guide or the corresponding screen guide is integrated into the gutter, in particular into a raised wall of the gutter or into the bottom of the gutter.

[0016] In an embodiment, the roof device comprises a control system configured for the control, in particular, the mutual independent control of the panel device and the screen device. The control system can be a manual control system, wherein a user moves the panels and/or the screen directly or indirectly. The control system is preferably a motorised control system. A motorised control system will typically comprise a motor and control means that converts the movement of the motor into a movement of the panels and/or screen.

[0017] In an embodiment, the roof device comprises an nearly rectangular frame onto/into which the panel device and the screen device are attached. The use of the same frame for the mounting of both the panel device and the screen device simplifies the installation of the roof device and is, in particular, advantageous when using a common rail system as described above.

[0018] In an embodiment, the frame comprises, in addition to the first pair of beams, also a second pair of beams which together form nearly a rectangle, wherein the second beams are located opposite one another. In particular, the first pair of beams can be used to hold the rail system as described above and/or the second pair of beams can be provided with an enclosure for holding the screen in its open position and/or at least one panel of the plurality of panels can be fixed to one of the second pair of beams. The construction of the frame of the roof device from parallel beams essentially simplifies the structure of the roof device as different functions are performed by the beam pairs.

[0019] In an embodiment, the plurality of panels is divided into two sets of panels positioned relative to one another, which sets are preferably symmetrical relative to one another such that, in their closed position, they each form nearly half of the roof, and wherein said at least one screen is formed by two screens positioned relative to one another, which screens are preferably symmetrical relative to one another such that, in their closed position, they each cover nearly half of the roof.

[0020] This primarily ensures a symmetrical appearance of the roof device which is aesthetically pleasing. In addition, this allows for a larger surface area of the roof while limiting the stacked height of the panels given that there are two stacks of panels in the closed position as opposed to only one stack in the more general embodiments. Furthermore, this further increases the possible configurations with regard to light transmittance and/or waterproofness, given that the panel device and/or the screen device can also be set up half- opened/closed.

[0021 ] In an embodiment said at least one screen is formed by two or more screens, which screens are preferably located relative to one another at opposite ends of the roof device, wherein, more preferably, the screens are symmetrical relative to one another such that, in their closed position, they each cover nearly half of the roof.

[0022] The advantage of using multiple screens is that the same surface area can be covered with smaller screens. There is, therefore, less tendency for the screens to sag and the space required for the screens in their open position is also smaller given that a screen roller with a smaller diameter can be used. [0023] In an embodiment, the sliding direction of the panels is nearly identical to the sliding direction of the screen, in particular horizontal.

[0024] Although it is possible to take the sliding direction of the panels and the screen differently, for example a screen sliding direction that is perpendicular to the panel sliding direction, it is preferable to take both sliding directions in the same manner. In this way, the guidance for both the screen and the panel device can be provided in the same beam, which simplifies integration. It is also possible to provide the screen, in its open position, underneath the open panel, while this is no longer possible with different sliding directions. Furthermore, there is also an aesthetic aspect.

[0025] In an embodiment, the screen can be rolled-in and rolled-out wherein the open position is formed by the screen in its rolled-in position and the closed position is formed by the screen in its rolled-out position.

[0026] In an embodiment, the panels, in their closed position, are aligned side by side in the same (horizontal) plane and the panels, in their open position, are stacked aligned one above another.

[0027] In an embodiment, the panels comprise a connection element and a connection point, wherein the connection element of each panel is configured for coupling and decoupling with a connection point of an adjoining panel. [0028] In an embodiment, the panels comprise a panel frame and a panel infill which, preferably, is attached to the panel frame with a leak-proof seal. [0029] In an advantageous embodiment, the panel infill is translucent and/or transparent. In an advantageous embodiment, the screen is sunproof and/or reflective.

[0030] In an embodiment, the screen extends nearly horizontally in its closed position and/or the panels extend nearly horizontally in their closed position.

[0031 ] In an aspect, the invention concerns a retractable roof comprising a roof device according to one or more embodiments as described herein. The roof will typically comprise a roof frame to which the rail system can be mounted. [0032] In an aspect, the invention concerns a terrace canopy comprising a retractable roof according to one or more embodiments as described herein. The terrace canopy will typically comprise columns and beams onto which, to which or in which the retractable roof can be placed.

[0033] According to an aspect, the invention concerns the use of the roof device as a roof infill for a terrace canopy.

[0034] Brief description of the drawings

[0035] The invention will be explained in more detail below based on the following description and the attached drawings.

[0036] Figure 1 shows a schematic representation of a roof device comprising a plurality of panels movably arranged alongside a single-track rail system.

[0037] Figure 2 shows a schematic representation of a roof device comprising a plurality of panels movably arranged alongside a single-track rail system, wherein the roof device further comprises a connection system.

[0038] Figure 3 shows a movable panel comprising a connection system.

[0039] Figure 4 shows a coupling between movable panels using a connection system.

[0040] Figure 5 shows a schematic representation of a roof device comprising a plurality of panels movably arranged alongside a multi-track rail system.

[0041] Figure 6 shows a schematic representation of a roof device comprising a plurality of panels movably arranged alongside a multi-track rail system.

[0042] Figure 7 shows a schematic representation of a roof device comprising panels movably alongside a multi-track rail system, wherein the roof device also comprises a connection system.

[0043] Figure 8A shows a coupling between movable panels using a first advantageous embodiment of a connection system.

[0044] Figure 8B shows a coupling between movable panels using a second advantageous embodiment of a connection system.

[0045] Figure 9A shows a coupling between movable panels using a first advantageous embodiment of a connection system from a top perspective. [0046] Figure 9B shows a coupling between movable panels using a first advantageous embodiment of a connection system from a bottom perspective. [0047] Figure 10 shows a schematic representation of a coupling between movable panels using a second advantageous embodiment of a connection system.

[0048] Figure 11 A shows a schematic representation of a roof device comprising movable panels arranged alongside a multi-track rail system in an open roof position, wherein the roof device also comprises an advantageous embodiment of a connection system.

[0049] Figure 11 B shows a schematic representation of a roof device comprising movable panels arranged alongside a multi-track rail system in a closed roof position, wherein the roof device also comprises an advantageous embodiment of a connection system.

[0050] Figure 12A shows a schematic representation of a roof device comprising movable panels arranged alongside a multi-track rail system in an open roof position, wherein the roof device also comprises an advantageous embodiment of a connection system.

[0051] Figure 12B shows a detailed representation of movable panels stacked one above another in the open roof position.

[0052] Figure 13 shows an illustration of a movable panel comprising a stacking system in side view.

[0053] Figure 14 shows a schematic representation of a roof device comprising movable panels arranged alongside a multi-track rail system, wherein the roof device also comprises a stacking system.

[0054] Figure 15 shows a schematic representation of a roof device comprising movable panels arranged alongside a multi-track rail system, wherein the roof device also comprises a stacking system.

[0055] Figure 16 shows an image of a roof panel as viewed along a top side of the roof panel.

[0056] Figure 17 shows a cross-section of a roof panel as viewed along a side of the roof panel.

[0057] Figure 18 shows an image of a roof panel as viewed along the top side of the roof panel.

[0058] Figure 19 shows a cross-section of a roof panel as viewed along the top side of the roof panel.

[0059] Figure 20 shows an image of a roof device according to an advantageous embodiment.

[0060] Figure 21 shows different configurations of a terrace canopy comprising a roof provided with a panel device and a screen device.

[0061] Figure 22 shows the roof device of Figure 21 in more detail in different configurations.

[0062] Figure 23 shows a cross-section through a roof device according to an advantageous embodiment.

[0063] Embodiments of the invention

[0064] The present invention will be described below using specific embodiments and referring to specific drawings, but the invention is not limited thereto and is defined only by the claims. The drawings shown here are only schematic and are not limitative. In the drawings, the dimensions of certain components may have been enlarged, which means that the components in question are not shown to scale, and this is only for illustrative purposes. The dimensions and relative dimensions do not necessarily correspond to the actual practical implementations of the invention.

[0065] In addition, terms such as “first”, “second”, “third”, etc. are used in the description and in the claims to distinguish similar elements and not necessarily to indicate a sequential or chronological order. The terms in question are interchangeable in appropriate circumstances, and the embodiments of the invention may operate in sequences other than those described or illustrated here.

[0066] The term “comprising” and derived terms, as used in the claims, should not be interpreted as being limited to the means mentioned in each case thereafter; the term does not exclude other elements or steps. The term shall be interpreted as a specification of the mentioned properties, integers, steps, or components to which reference is made, without excluding the presence or the addition of one or more additional properties, integers, steps, or components, or groups thereof. Therefore, the scope of an expression such as “a system comprising the means A and B” is not limited to systems consisting purely of components A and B. On the contrary, as far as the present invention is concerned, the only relevant components are components A and B.

[0067] The enumeration of numerical values using a numerical range includes all values and fractions in these ranges, as well as the endpoints quoted. The term “approximately”, as used when referring to a measurable value such as a parameter, a quantity, a duration, and so on, is intended to include variations of +/- 10% or less, preferably +/-5% or less, more preferably +/-1% or less, and even more preferably +/-0.1 % or less, of and from the specified value to the extent that the variations apply to function in the disclosed invention. It should be understood that the value to which the term “approximately” refers was also disclosed.

[0068] The same applies to the term “substantially” which comprises variations of +/- 10% or less, preferably +/-5% or less, more preferably +/-1% or less, and still more preferably +/-0.1% or less, of the specified situation, to the extent that the variations apply to function in the disclosed invention. It should be understood that the term “substantially A” is intended to include “A”.

[0069] The invention generally concerns a roof device comprising a plurality of stackable panels movably arranged alongside a rail system (i.e. a panel device) underneath which a screen device is present. This system can be suitable for a sliding structure, such as a retractable roof. The invention concerns a roof device for a retractable roof. The roof device is particularly suitable for a flat retractable roof. A flat roof is a roof whose roof surface area is nearly level; i.e. with an inclination of less than 10° and preferably less than 5°, for example less than 2° or 1 °. For example, the individual panels, in particular the infill panels, can have a curved surface without any difference in height between them. A roof device concerns a movable device for the infilling of a roof frame. When the movable roof device is mounted in a roof, it can be referred to as a retractable roof. The retractable roof can be part of a structure comprising a roof device with an opening and raised walls, such as a terrace canopy, pergola, carport, and the like. The term retractable means that the roof can slide both open and closed. The movable device will be mounted in the roof in such a way that a movement is possible between at least two positions, namely a first, closed roof position and a second, open roof position. Optionally, the roof device can be arranged to move to one or more intermediate positions in which the roof is only partially open, for example, half-open or quarter-open.

[0070] The screen device comprises at least one screen, in particular a retractable screen. The screen device is located below the panel device and is movable between an open position and a closed position mainly for the control of the light incidence. In the closed position of the screen device, the panels are covered, i.e. hidden from view.

[0071] The panel device comprises at least a plurality of panels which will form the roof infill. A panel is a rigid structure that will form a component or segment of the roof device; it can therefore also be referred to as a roof panel. A panel will typically have a beam- or block-shaped structure consisting of six nearly rectangular surfaces; namely, an upper surface, a lower surface (or base surface), and four lateral surfaces. The lower surface should preferably be nearly as large as the upper surface. The term nearly must be interpreted to mean that the referenced body or structure is substantially similar to the referenced geometrical form; i.e. excluding any roundings, bends, protrusions, connecting elements, grooves, slots, ribs, openings, joints, reinforcements, etc.; reference is made to the figures for further clarification.

[0072] Any reference to an orientation of the panels will be interpreted with reference to the position when mounted in the roof or roof frame: the lower panel wall or bottom wall is the panel wall which is or will be oriented in the direction of the base surface (the earth, e.g. the terrace floor), while the upper panel wall or top wall is the panel wall which is or will be oriented in the direction of the upper surface (the sky, e.g. the open air). Any reference to a direction of the panels will be interpreted with reference to the direction of movement of the panels alongside the track system from the open roof position, wherein the panels are stacked one above another, to the closed roof position, wherein the panels are next to one another in the same plane. A panel will therefore move forward in the direction of its open roof position to its closed roof position, and equivalent thereto, a panel will move backwards in the direction of its closed roof position to its open roof position. Reference is made to the figures and examples for further clarification. Throughout the text, the terms -edge, -wall, -side, -surface can be used interchangeably; for example, the upper side, upper edge, upper wall, upper surface should be regarded as equivalent. The rail walls are the remaining sidewalls of the movable panels which are oriented in the direction of the rail system (mounted on both sides of the roof frame) and preferably in contact with a component of the rail system. The panel wall infills can be partially or fully curved (i.e. curved surface); an arched surface of the upper panel wall infill, for example, can provide improved drainage to the sides of the roof.

[0073] The movable panels are preferably stackable; they can be stacked one above another. The movable panels are stackable when the roof is (completely) open. Preferably the panels are stacked aligned one above another. Aligned stacking means that the stacking shows nearly no deviations; i.e. two adjacent panel walls in the open position will cover one another substantially completely in the stacked position. As a result, in the open roof position, the closed roof space can be limited to the surface area of only one panel. This is different from other roof devices wherein often only part of the panels can slide (for example wherein only one panel slides on a second panel), and/or the panels can only partially slide over one another (for example wherein the panels protrude on one side and form a stepped structure), thus limiting the size of the open roof space. In addition to an aesthetic improvement, the current roof layout will also provide more light in an open roof position. Optionally, the stacked panels can rest one above another; the uppermost or lowermost panel walls of the top or bottom panels will come into contact with one another. In a stacked position, the weight of the top panels can be absorbed by the underlying panels, or the weight of each panel can be absorbed separately by, for example, the rail system and/or additional support elements, or a combination of both. [0074] The movable panels are preferably alignable in the same plane; they can be aligned in the same plane. The movable panels are aligned in the same plane when the roof is (completely) closed. In the same plane means that the panels lie in one plane wherein the panels are arranged next to one another at nearly the same height (no stepped structure) in a straight line (no curvature). The tangent plane of the top and/or bottom surfaces of each panel will, when the roof is completely closed, extend into the respective top and/or bottom surfaces of the adjoining panels; i.e. excluding any projections (e.g. reinforcing elements) or openings (e.g. gutters for water drainage, or for placement of lighting ) provided in the upper and/or lowermost panel walls; for further clarification we refer to the figures.

[0075] There can be numerous variations on the dimensions of the panels and therefore also on the dimensions of the roof device. The dimensions can a.o. be adapted to the size of the roof, the number of movable panels, the material from which the panels are made, etc. By way of example, a panel may have a length of at least 0.50 m up to at most 5.00 m; such as 2.00 m, 2.50 m, 3.00 m, 3.50 m, 4.00 m, 4.50 m and so on. By way of example, a panel may have a width of at least 0.50 m up to at most 3.00 m; such as 1 .00 m, 1 .50 m, 2.00 m and so on. By way of example, a panel may have a height of at least 1 cm up to at most 50 cm; such as 5 cm, 10 cm, 15 cm, 20 cm, 25 cm and so on. In an exemplary embodiment, a roof with the following dimensions is considered: 4.50 m x 6.20 m. This roof can be filled in a first example by 6 movable panels, wherein each panel is 950 mm x 4,200 mm (after deduction of the frame in which the illustrative roof infill will be mounted). In a second example, this same roof can be filled in by 8 panels, wherein each panel is 715 mm x 4200 mm. The advantages and disadvantages of the different dimensions are assumed to be known by the person skilled in the art. Alternatively or additionally, several roof devices can be positioned alongside or opposite one another in separate rows and/or columns. As a result, there is in principle no limit to the maximum roof surface area that needs to be filled in.

[0076] The panel frame - or the frame as used herein - refers to a rigid structure that is suitable for supporting and preferably framing a panel infill. The frame comprises at least one frame profile. The frame profile - or the profile as used herein - refers to a rigid and preferably elongated body, typically used to frame a frame. Depending on the desired embodiment, a profile can be both rounded and flat, with a wide or narrow wall, hollow inside or filled with a filling material, corrugated or smooth, and/or include ornamental finishes. The desired dimensions of the frame and by extension those of the profiles will typically correspond to the desired dimensions of the panel. The person skilled in the art is expected to have sufficient knowledge to adapt the panel frame to the desired embodiment. The profiles are typically made of a rigid material. This can be aluminium, for example. Aluminium has many advantages as a profile material, as it is both robust and light, resistant to adverse weather conditions and requires little maintenance. However, other materials are also suitable and their advantages or disadvantages are assumed to be known by the person skilled in the art. A profile can be produced using various techniques depending on the material, including extrusion, milling, setting, casting, welding and so on. The appropriate production technique is assumed to be known by the person skilled in the art.

[0077] The frame typically has an nearly quadrangular, preferably rectangular, shape. The frame can be formed by a single, multi-curved frame profile. However, it is simpler and more efficient to produce multiple frame profiles and then couple them together to form the frame. The panel frame will typically comprise four profiles; in particular, two main profiles which are typically arranged at the front and rear side of the roof panel, thereby forming the front and rear wall, and two side profiles which are typically arranged at the short side of the roof panel and thereby forming the sidewalls. The front and back side of the roof panel will typically be formed by the long sides of the roof panel and the short side by the short sides. The person skilled in the art understands that depending on the desired embodiment of the roof panel, this roof panel can also be the other way around, in particular, in that the front and back side of the roof panel will be formed by the long sides of the roof panel and the short side by the short sides. The main profiles and side profiles are discussed in more detail below.

[0078] The panel infill will typically form the top side of the roof panel and, when mounted in a roof device, also the top side of the roof. The panel infill will provide the waterproof shielding of the roof. The panel infill is made of a waterproof material that is preferably waterproof mounted or can be mounted at an inclination and/or with a certain convex bending in the panel frame. As a result, the water that is present on the roof panel will be able to drain off along the sides of the roof frame, without thereby arriving onto the screen device underneath, which could leave marks, damage or permanent traces.

[0079] The panel infill will typically be a plate that fills in the space of the panel frame; preferably the entire space between the main profiles of the panel frame. The panel infill may be made of different materials or even combinations of materials. The choice of material can, among others, be adapted to the size of the roof (rigidity), the application of the roof device (translucent or light-blocking), the climate in which the structure is placed (mainly sun, rain or snow), etc. By way of example, the panel infill can be made of metal (e.g. aluminium), plastic (e.g. PC, PMMA, PVC), (layered) glass, etc., and/or combinations of different materials. Optionally, the panel infill may be coated, for example with a water-repellent coating. The advantages and disadvantages of the various types of material and coatings are assumed to be known by the person skilled in the art. In particular, the panel infill may be made of a layered structure whose layers, particularly transparent ones, may contain the same or a different material. The advantage of such a layered structure is the structural reinforcement of the panel infill for the same or more limited height such that external loads such as snow can be carried better with limited and/or no permanent deflection. An example is the use of layered glass wherein the glass panels have a thickness of 3 mm and the plastic interlayer has a thickness of 0.2 mm.

[0080] The panel infill can be light-blocking, translucent or optically transparent. The term light blocking means that the panel infill substantially completely blocks visible light; for example at most 5% of visible light passes through; preferably at most 3%; more preferably at most 1 %. The term translucent means that the panel infill partially transmits but also partially blocks and/or scatters the visible light; for example, transmits at least 10% of the visible light or, for example, scatters at least 90% of the visible light; for example, transmits at most 90% of the visible light or, for example, scatters at least 10% of the visible light. Optically transparent means that the panel infill transmits nearly all of the visible light; for example transmits at least 90% of the visible light or scatters at most 10% of the visible light; preferably transmits at least 95% of the visible light or scatters at most 5% of the visible light; more preferably transmits at least 98% of the visible light or scatters at most 2% of the visible light; more preferably transmits at least 99% of the visible light transmitted or scatters at most 1% of the visible light. It is also possible to apply patterns, logos, motifs, etc. to the panel infill by manufacturing the panel infill from both light-blocking, translucent and/or optically transparent zones.

[0081] A surface of the panel infill can be curved. The surface of the panel infill will preferably be convex. The term convex as used here means that the surface is curved outwards. The convex surface will typically be the top side of the roof panel. The convex shape has the advantage that rain and/or snow water will run down towards the side profiles of the panel for improved water drainage. [0082] The convex surface can be curved. The term curved as used here means that the surface of the panel infill is curved outwards like the circumference of a circle. The convex surface can be circular or spherical. The term spherical as used herein means that the surface of the panel infill is curved outwards like the outline of a ball. An arched or spherical surface will provide improved water drainage. The curve of the convex surface can optionally deviate partially or completely; for example, to form an elliptical or oval-shaped surface.

[0083] The radius of curvature (R) of the curved surface is at least 1 m to at most 150 m. The radius of curvature is preferably 5 m to 100 m; more preferably 10 m to 80 m; more preferably 20 m to 60 m; more preferably 30 m to 40 m; for example 31 m; for example 32 m; for example 33 m; for example 34 m; for example 35 m; for example 36 m; for example 37 m; for example 38 m; for example 39 m. The person skilled in the art understands that the radius of curvature is calculated as a radius of curvature interval based on the R-test, wherein the length corresponds to the chord of the curved panel infill and the height is measured from the highest (middle) point to the chord. Optionally, the apex can be internally supported or provided.

[0084] The apex of the curved panel infill can be at least 10 mm to at most 50 mm higher than an end of the panel infill at the ends of the roof panel. The apex should preferably be at least 10 mm to at most 45 mm higher; more preferably 10 mm to 40 mm; more preferably 15 mm to 35 mm; more preferably 20 mm to 30 mm; for example 25 mm.

[0085] A surface of the panel infill can be inclined. The slope has the advantage that rain and/or snow water will run down towards the side profiles of the panel for improved water drainage. Preferably, the surface of the panel infill will form a gable roof. The term “gable roof” as used here means that the panel infill consists of at least two inclined panel infill components which intersect in a ridge. The components are preferably coupled together in the ridge to obtain a stable structure. The inclined panel infill components are preferably of equal length; in other words, the panel infill forms a symmetrical gable roof. Alternatively, a single panel infill can form a gable roof by bending at least one point; the bending point will form the ridge. Optionally, the top of the ridge can be supported or provided internally. The gable roof shape has the advantage that rain and/or snow water will run down towards the side profiles of the panel for improved water drainage.

[0086] The inclination of the panel infill can be from at least 0.5° to at most 5.0° from the ridge to an end of the panel infill at the end of the roof panel. The inclination is preferably at least 1 .0° to at most 3.0°; more preferably 1 .0° to 2.5°; more preferably 1.0° to 2.0°; more preferably approximately 1.5°; for example 1.3°.

[0087] The ridge of the curved panel infill can be at least 10 mm to at most 50 mm higher than an end of the panel infill at the ends of the roof panel. The apex should preferably be at least 10 mm to at most 45 mm higher; more preferably 10 mm to 40 mm; more preferably 15 mm to 35 mm; more preferably 20 mm to 30 mm; for example 25 mm.

[0088] The panel infill is preferably attached to the panel frame through clamping the body of the panel infill by the frame profiles. The frame can thus form a space suitable for insertion of the panel infill. Preferably the panel infill will be clamped along at least one upper side and one lower side. An edge, preferably all edges, of an upper and/or lower surface of the panel infill can be partially covered by the frame profiles. Alternatively or additionally, the panel infill can be clamped along the sides. Preferably, the sides of the panel infill will be completely covered by the frame profiles.

[0089] The clamping of the panel infill can be achieved by providing the main profiles and/or side profiles with a U-profile (also known as a C-profile), wherein the distance between the raised walls of the U-profile (also known as the height) nearly corresponds to the thickness of the panel infill. By sliding the panel infill between the raised walls, it will remain clamped after the coupling of adjacent profiles.

[0090] The clamping of the panel infill can be achieved by providing the main profiles and/or side profiles with two clamping profiles, wherein a clamping profile will make contact with an upper side of the panel infill and a second clamping profile will make contact with a lower side of the panel infill. The clamping profiles can then be coupled to an upright sidewall of the main profiles and/or side profiles to clamp the panel infill.

[0091 ] The panel infill can be attached to the panel frame with a leak-proof seal. Preferably, when the panel infill is clamped, the seal will close all free spaces and thus prevent potential leaks of rain and snow water. The seal can be placed between the frame and the panel infill. The seal can also be placed between separate frame profiles. The seal is typically made of a compressible material. This can be plastic or rubber, for example. Alternatively, the seal can be achieved by using hardenable materials such as silicone.

[0092] The panel frame may also comprise a drainage slot for the downward drainage of rain or snow water, which preferably runs sideways from the upper side of a panel infill. A drainage slot may be formed by producing the length of the panel infill less than the corresponding length of the main profiles of the panel frame onto which the panel infill will be attached. This creates an elongated opening during assembly between a side of the panel infill and a side profile of the panel frame along which the water can flow down. On the side of the panel infill, a downward directed drip nose profile can be attached which can contribute to the shielding of the underlying screen device against downwards flowing water. In an advantageous embodiment, both side profiles will form a drainage slot on both sides of the roof panel, preferably with a drip nose profile attached to both sides of the panel infill.

[0093] Optionally, when mounting the roof panel in a roof device, the drainage slot can be placed above a roof frame gutter of the roof device or roof structure for improved drainage to prevent leaks on the base surface of the roof device such as the terrace. By keeping the width of the drainage slot smaller than the width of the roof frame gutter, the waterproofing can be hidden from view. [0094] The panel frame can also comprise a roof panel gutter for sideways drainage of rain or snow water that preferably runs sideways from the top of a main profile. A roof panel gutter can be formed by providing the main profile with an inclined structure at an end of the main profile. This creates, during the assembly of the roof panels in a roof device, a roof panel gutter between two adjoining roof panels, in particular between two adjoining main profiles of two adjoining roof panels, i.e. between a foremost main profile of a first roof panel and a rearmost main profile of a second roof panel. The sideways flowing water can then flow downwards through the drip nose described above, preferably along the drainage slot described above, or a separate drainage opening can be provided on the side of the main profile.

[0095] The roof device may also comprise a roof frame gutter for sideways drainage of rain or snow water that preferably runs sideways from the top side of a roof panel. The roof frame gutter may comprise an elongated beam or semi circular structure typically connected to a vertical drain pipe. The roof frame gutter prevents the drained water from falling directly from the roof onto the underlying terrace or ground.

[0096] The roof frame gutter can be a separate structure that is attached to or connected to a panel frame. Alternatively, the roof frame gutter can be integrated into the panel frame. The roof frame gutter will be arranged to collect the water running down from a roof panel. The roof frame gutter can be arranged alongside the roof panel, wherein the roof frame gutter preferably connects to an end of the roof panel. The roof frame gutter can be arranged under a roof panel, wherein the roof frame gutter is preferably arranged under an end of the overlying roof panel. The roof frame gutter can be arranged under a drainage slot of an overlying roof panel. The roof frame gutter can be hung under the overlying roof panel.

[0097] The roof frame gutter can be arranged under a drip nose profile of an overlying roof panel. The roof frame gutter can comprise a raised wall to guide the water. The raised wall can have a raised upper edge to prevent overflow of the drained water. The upper edge can be raised to be higher than or at least have the same height as the lower edge of a drip nose profile of an overlying roof panel. This has the advantage that water splashes from water running down, preferably via the drainage slot, are collected. In addition, this will also prevent the creation of a light slit on the side of the roof as a result of the presence of a drainage slot.

[0098] EXAMPLES

[0099] Reference is made to the figures by way of example. The embodiments illustrated in the figures concern preferred embodiments of the current invention and should in no way be interpreted as a limitation.

[00100] Example 1 : Single-track rail system

[00101] Figure 1 shows a schematic representation of a roof device (100) comprising three panels (200) movably arranged alongside a single-track rail system (310). The movable panels will move in one and the same plane; preferably move by sliding.

[00102] In a first, open roof position (Figure 1 (a)), all movable panels (200) are stacked aligned one above another: the upper panel wall of the first, lowermost panel (201 ) is completely covered by the lowermost panel wall of the second, adjoining panel (202); and the upper panel wall of the second panel (202) is completely covered by the lowermost panel wall of the third, upper panel (203). In Figure 1 (b), a first, lowermost panel (201 ) will be controlled to move along the single-track rail system (310) in the forwardmost direction (i.e. in the direction of the forwardmost panel wall); this forwardmost direction of movement is indicated by a dashed arrow. When the first panel (201 ) is completely from below the panels (200) stacked one above another, the second panel (202) will move downwards to end up next to the first panel (201 ) on the single-track rail system (310) (Figure 1 (c)); this downward direction of movement is indicated by a dashed arrow. The second panel (202) will be able to move forward together with the first panel (201 ) (Figure 1 (d)). This will also allow the third, upper panel (203) to move downwards. All movable panels (200) have moved sequentially (203) forwards and/or downwards until all movable panels (200) are aligned next to one another in the same plane (and preferably aligned with one another) (Figure 1 (e)). The first, lowermost panel (201 ) has become the foremost panel (201 ); and the third, upper panel (203) has become the rearmost panel (201 ). [00103] Figure 2 shows a schematic representation of a roof device (100) comprising three panels (200) movably arranged alongside a single-track rail system (310), wherein the roof device (100) also comprises a connection system. The connection system comprises a connection element (220) and a complementary connection point (225); each movable panel (200) that is arranged to couple to adjacent panels comprises a downward-facing connection element (220) arranged on a foremost panel wall and an upward-facing connection point (225) arranged on a rearmost panel wall. The single-track rail system (310) comprises a lowermost (311 ) and an upper (312) guide rail which extends in a direction along which the retractable roof will slidingly open and close. For simplicity, only the guide rails of one side of the rail system are shown in the figure; the guide rails arranged on the opposite side of the roof frame are not shown. At a first end in the direction of the rearmost panel walls, the guide rails run (diagonally) upwards such that the panels can be stacked one above another in an aligned manner. Each movable panel (200) is preferably provided with at least one roller bearing per guide rail (311 , 312): at least four roller bearings in total.

[00104] Equivalent to the example described above, in Figure 2(a) the movable panels (200) are stacked aligned one above another. The first panel (201 ) will move forward along the guide rails (311 , 312) of the single-track rail system (310) (Figure 2(b)). Due to the forward motion, the connection point (225) arranged on the rearmost panel wall of the first panel (201 ) will overlap with the connection point (220) arranged on the foremost panel wall of the second panel (202) (Figure 2(c)). This will allow the second panel (202) to move downwards (Figure 2(d)). The downward movement of the second panel (202) will ensure that the second panel will lie in the same plane as the first panel (201 ) that the two panels (201 , 202) will couple with each other by hooking the connection element (220) of the second panel (202) with the connection element (225) of the first panel (201 ) (Figure 2(e)). This coupling (encircled) will ensure that on further forward movement of the first panel (201 ), the first panel (201 ) will be able to pull along the second, coupled, panel (202) in the same forward movement direction. Equivalent to the above, the third panel (203) will be able to couple with the second panel (202) through which the third panel (203) will also be pulled along by the forward motion of the first panel (201 ) (Figure 2(f)).

[00105] Figure 3 shows a detailed image of a first, movable panel (201 ) comprising a connection system. The connection system comprises a connection element (220) arranged on a foremost panel wall of the panel (201 ) that can couple to a complementary connection point arranged on a rearmost panel wall of another panel (not shown). The connection element (220) comprises a downwards-facing hook-shaped body extending forwards from the foremost panel wall; the hook-shaped body has an L-shaped profile with a downwards- facing hook structure. The connection system further comprises a connection point (225) arranged on a rearmost panel wall of the panel (201 ) which can couple to a complementary connection element arranged on a foremost panel wall of another panel (not shown). The connection point (225) comprises an upward-facing hook-shaped body extending backwards from the rearmost panel wall; the hook-shaped body has an L-shaped profile with an upward-facing hook structure. The first panel (201 ) also comprises a set of roller bearings to enable movement along rails.

[00106] Figure 4 shows a detailed image of a coupling between two adjoining panels, namely a first panel (201 ) and a second panel (202). The rearmost panel wall of the first panel (201 ) couples to the foremost panel wall of the second panel (202) by hooking the connection element (220) of the first panel (201 ) onto the complementary connection point (225) of the second panel (202). In this example, there are no openings between the two adjoining panel walls of the two coupled panels (201 , 202). Both the upper and lower surfaces of the coupled panels form an nearly continuous and contiguous surface area.

[00107] Example 2: Multi-track rail system

[00108] Figures 5 and 6 show schematic images of two embodiments of roof devices comprising three panels (200) arranged alongside a multi-track rail system (320). The panels (200) will be able to move in different but parallel planes.

[00109] Figure 5 illustrates a first embodiment in which the movable panels stacked one above another will move through the rail system. In a first, open roof position, all movable panels (200) are stacked one above another (Figure 5(a)). The most underlying panel (210) is fixed; it cannot move along the rail system (320). The first movable upper panel (201 ) will be controlled to move in the forward direction along the first most overlying component (321 ) of the multi track rail system (320) (Figure 5(b)); this forward direction of movement is indicated by a dashed arrow. A forward movement of the first panel (201 ) can ensure that the underlying movable panels (202, 203) will move in the same forward direction; for example, these underlying movable panels can be pulled along by the first panel (201 ). Alternatively, the underlying movable panels (202, 203) can be controlled individually. Due the forward motion, the third movable lowermost panel (203) will no longer be stacked above the fixed panel (210) and will be able to move downwards (Figure 5(c)); this downward motion direction is indicated by a dashed arrow. Due to the downward movement, the third movable panel (203) will end up in the same plane as the fixed panel (210) such that the panels end up aligned next to one another (Figure 5(d)). The remaining movable panels will move forward until all movable panels (200) are aligned next to one another in one and the same plane (and preferably abut each other) (Figure 5(e)). [00110] Figure 6 illustrates a second embodiment in which the movable panels will move separately through the rail system. Figure 6(a) is equivalent to Figure 5(a), with the difference that each movable panel (200) will be controlled separately. In Figure 6(b), by way of example, the third movable lowermost panel (203) will be controlled first to move forward along the multi-track rail system (310). The third movable lowermost panel (203) will move forwards until it is no longer stacked above the fixed panel (210) and will be able to move downwards (Figure 6(c)); this downward movement direction is indicated by a dashed arrow. The downward movement of the third panel (203) will ensure that the third panel (203) arrives at the same plane as the fixed panel (210) (Figure 6(d)). At the same time or subsequently, by way of example, the second panel (202) will be controlled to move along the multi-track rail system (310) in the forward direction. Each remaining movable panel will move forward separately until all the movable panels (200) lie next to one another in one and the same plane (and preferably abut each other) (Figure 6(e)).

[00111] Figure 7 shows a schematic representation of a roof device comprising three panels (200) movably arranged alongside a multi-track rail system (310), wherein the roof device also comprises a connection system. [00112] The connection system comprises a connection element (220) and a complementary connection point (225); each movable panel (200) that is arranged to couple to adjoining panels comprises a downward-facing connection element (220) arranged on a front panel wall and one upward-facing connection point (225) arranged on a rear panel wall. The multi-track rail system (320) comprises a plurality of guide rails arranged in parallel; namely one foremost and one rearmost guide rail for each movable panel (200) which extend in a direction along which the retractable roof will slide open and closed. For simplicity, only guide rails from one side of the rail system are shown in the image; the guide rails arranged on the opposite side of the roof frame are not shown.

[00113] Each movable panel (201 ,202,203) is provided with at least one roller bearing per guide rail, i.e. at least four roller bearings in total. The most underlying panel (210) is fixed; it cannot move along the rail system (320). The first panel (201 ) is supported by a first front (331 ) and a first rear guide rail (341 ), the second panel (202) by a second front (332) and a second rear guide rail (342), and the third panel (203) by a third front (333) and a third rear guide rail (343). The front guide rails (331 -333) are laterally oriented guide rails which change into a diagonal orientation. The rear guide rails (341 -343) are diagonally oriented guide rails which change into a downward orientation.

[00114] Equivalent to the example described above, in Figure 7(a) the movable panels (200) are completely stacked one above another. For example, the third movable lowermost panel (203) will be the first to move forward over the guide rails (333,343) of the multi-track rail system (320) (Figure 7(b)). The third panel (203) will continue to move forward until the connection element (220) arranged on the rear panel wall of the third panel (203) overlaps with the connection element (225) arranged on the front panel wall of the fixed panel (210) (Figure 7(c)). This will allow the third panel (203) to move downwards such that the connection element (220) of the third panel (203) will be able to couple to the connection element (225) of the fixed panel (210) (Figure 7(d)). The third panel (203) will lie next to the fixed panel (210) in the same plane. Subsequently, the second movable panel (202) will also move forward over the guide rails (332,342) of the multi-rail system (320) until the second panel (202) can similarly couple to the third panel (203) (Figure 7(e)); namely by coupling the connection element (220) of the second panel (202) to the connection point (225) of the third panel (203). The remaining panels will in turn also move forward until all movable panels are aligned next to one another in one and the same plane (and preferably connected) (Figure 7(f)).

[00115] Example 3: Connection system

[00116] The advantages of a connection system for use in a roof device have already been described in example 1 for a single-track rail system and in example 2 for a multi-track rail system. Example 3 describes a preferred embodiment of the connection system.

[00117] Figures 8A and 8B show schematic images of two embodiments of roof device (100) showing a coupling between two adjacent panels (201 , 202), wherein the connection element (220) of the first panel (201 ) couples to the complementary connection point (225) of the second panel (202).

[00118] The connection point (225) comprises a first body extending laterally forward from the front panel wall of the second panel (202). At right angles to the end of the first body, there is an upward-pointing second body. The upward-facing second body runs diagonally towards the front panel wall of the second panel with a low angle of inclination. The end of the second body is curved such that at least part of the second body will extend back towards the front panel wall of the second panel. The two bodies can also be seen as one continuous body with one or more bends. [00119] The connection element (220) comprises a first body extending laterally backwards from the rear panel wall of the first panel (201 ). There is a downward pointing second body right-angled to the end of the first body. The downward-facing second body is partly curved to form a stepped surface area with a structure corresponding to the surface area of the complementary connection point (225). The end of the second body is curved such that at least part of the second body will extend back towards the rear panel wall of the first panel. This shape will ensure that when the first panel (201 ) moves downwards on the second panel (202), the connection element (220) will be able to connect to the connection point (225) to connect the two coupled panels (201 , 202). The first panel (201 ) also comprises a reinforcement element (290) which comprises an upward facing body extending laterally from the rear panel wall of the first panel (201 ). The reinforcement element (290) is connected to the connection element (220); in particular to a first part of the body of the connection element (220) which extends backwards from the rear panel wall of the first panel (201 ). The reinforcement element (290) is perpendicular to the upper surface of the first panel (201 ). The coupling between the connection element (220) of the first panel (201 ) and the connection point (225) of the second panel (202) will allow the reinforcement element (290) to support the second panel (202) and loads on the upper surface of the roof device will be spread over the plurality of coupled panels.

[00120] Figure 8A, in particular, shows a first embodiment in which a sliding clip (230) was placed on one end of the connection element (220). In this embodiment, the connection element (220) can slidably couple to the connection point (225). During coupling, this clip (230) will come into contact with one end of the connection point (225) of the second panel (202), allowing the body of the connection point (225) to slide over the clip (230). The clip (230) will reduce the friction between the bodies of the connection element (220) and the connection point (225) and thus improve the coupling/decoupling. The clip (230) may be made of various materials, including a plastic with a low coefficient of friction such as Teflon or PTFE. Alternatively or incidentally, the clip (230) can also be provided with a coating to reduce the coefficient of friction. The clip (230) can also be used to dampen sounds during the closing of the roof device. In particular, the clip (230) prevents two aluminium surfaces from colliding against one another during the closing, which typically causes noise. The provision of a clip (230) made of a suitable material prevents such noise.

[00121 ] Figure 8B, in particular, shows a second embodiment where a roller bearing (235) is affixed to one end of the connection in element (220). In this embodiment, the connection element (220) can couple to the connection point (225) in a Tollable manner. This roller bearing (235) will come into contact with one end of the connection point (225) of the second panel (202) during coupling, by means of which the body of the connection point (225) can roll over the roller bearing (235). The roller bearing (235) will prevent friction between the bodies of the connection element (220) and the connection point (225) and thus improve the coupling/decoupling. The roller bearing (235) can be made of various materials, including a low plastic with a low coefficient of friction such as Teflon or PTFE. Alternatively or incidentally, the roller bearing (235) can also be provided with a coating that lowers the coefficient of friction. The roller bearing (235), just like the clip (230), also serves to dampen sounds during the closing of the roof.

[00122] Figures 9A and 9B show images of the first embodiment of Figure 8A (with sliding clip) in perspective. In addition to the characteristics and components described above, Figure 9A and Figure 9B illustrate the size of the openings formed between the rear panel wall of the first panel (201 ) on the one hand and the front panel wall of the first panel (201 ) on the other hand during coupling of the connection point (225) to the connection element (220). The size and shape of the opening can be adjusted by changing the shape of the connection point (225) and/or the connection element (220), and/or by the presence of additional panel walls and/or protruding structures.

[00123] Figure 9A shows an top perspective wherein the upward-facing opening forms a gutter (221 ) between the front panel wall of the second panel (202) and the connecting element (220) of the first panel (201 ). This gutter (221 ) may be suitable for lateral rainwater drainage. The gutter runs across the full width of the panels (201 , 202).

[00124] Figure 9B shows a bottom perspective wherein at the lower plane the downward directed opening forms a spacing (226) between the rear panel wall of the first panel (201 ) and the connection point (225) of the second panel (202). This spacing (226) can be suitable for housing a luminous element, such as an LED strip, and the necessary electrical wiring, or a decorative element.

[00125] Figure 10 shows a schematic image of the connection system described above according to the second version of Figure 8B (with roller bearing). Figure 10(a) shows an uncoupled position wherein a connection element (220) from a first, overlying panel (201 ) ends up on top of a connection point (225) from a second, underlying panel (202). This position can be established, for example, by a multi-track rail system as described in example 2. In Figure 10(b), on a downward movement of the first panel (201), the roller bearing (235) fixed on one end of the connection element (220) will come into contact with one end of the connection element (225). The connection element (220) will roll over the body of the connection point (225) until the roller bearing comes into contact with an arc in the upward-facing body of the connection point (225), which will clamp the roller bearing (Figure 10(c)). The rolling coupling between the connection element (220) and the connection point (225) forms an upward facing channel (221 ) and a downward-facing spacing (226) (Figure 10(d)).

[00126] Figures 11 and 12 show a schematic image of the connection system described above applied in a roof device comprising a multi-track rail system (310). Figure 11 A shows an open roof position wherein the movable panels are stacked one above another. In the open roof position, the reinforcement elements (290) of the plurality of movable panels (200) will be placed against one another such that the stackability of the movable panels is not restricted. Figure 11 B shows a closed roof position wherein the movable panels are aligned next to one another in one and the same plane. The reinforcement elements (290) of the front panels can improve the strength of the rear panels. The loads can be shared between adjoining and coupled panels through the connection system. In this exemplary embodiment, the fixed (non-movable) panel (210) will also include a reinforcement element (290). The reinforcement elements (290) of the plurality of movable panels (200) will form a rib structure on the upper surface of the roof which can improve the strength of the roof over its entire surface area. Figure 12A shows a further embodiment of the roof device in Figure 11 A, wherein the first, upper panel (201 ) includes a second reinforcement element (295) provided to a front panel wall. The presence of a reinforcement element (290) at each end of the roof can further reinforce the strength of the roof over its entire surface area. Figure 12B shows a detailed representation of the panels of Figure 12A stacked one above another.

[00127] Example 4: Stacking system

[00128] The advantages of a stacking system for application in a roof device have already been described in example 2 for a multi-track rail system. Example 4 further describes a preferred embodiment of the stacking system.

[00129] Figure 13 shows a detailed image of a first movable panel (201 ) comprising a stacking system. The stacking system includes a downward-facing gripping element (250) arranged on a lower panel wall of the panel (201 ) that fits into a compatible groove (245) arranged on an upper panel wall of an adjoining panel (not shown). The depth and width of the groove (245) nearly corresponds to the length and width of the downward-facing gripping element (250) such that the groove (245) can completely enclose the gripping element (250). The panel (201 ) also includes such a groove (245) on the upper panel wall. The stacking system further comprises an upward facing guide element (240) arranged on an upper panel wall of the panel (201 ) that can bump against a downward-facing protrusion (250) arranged on a lower panel wall of an adjoining panel (not shown).

[00130] Figures 14 and 15 show a schematic image of a roof device (100) comprising at least two movable panels (200) arranged alongside a multi-track rail system (320), wherein the roof device further comprises a stacking system. Figure 14 shows an embodiment of the stacking system wherein the movable panels move from an open roof position to a closed roof position. Figure 15 shows an embodiment of the stacking system in which the movable panels move from a closed roof position to an open roof position.

[00131 ] Figure 14(a) shows that two movable panels (201 , 202) stacked one above another move forward (i.e. in the direction of the front panel wall) over separate guide rails of the multi-track rail system (320); the forward movement is indicated by a dashed arrow. The first movable panel (201 ) moves along a first front (331 ) and a first rear guide rail (341 ), and the second movable panel (202) moves along a second front (332) and a second rear guide rail (342). The two panels are coupled to each other using the stacking system (encircled): the downwards directed projection (250) of the first panel (201 ) is completely enclosed by the groove (245) of the second panel (202). This coupling ensures that the second panel can be pulled along the rail system (320) by the forward movement direction of the first panel (201 ). The second panel (202) may move forward until a front side of the second panel (202) is in contact with an end of the second front guide rail (332) (Figure 14(b)); this end will ensure that the forward movement of the second panel (202) (flat arrow) is blocked. Flowever, the rear side of the second panel (202) will be able to move further down along a downwards directed end of the second rear guide rail (342) (Figure 14(c)). This downward movement of the second panel (202) will ensure that the coupling between the downward directed projection (250) of the first panel (201 ) and the groove (245) of the second panel (202) is to disengage. The decoupling will allow the first panel (201 ) to move forward unhindered along the guide rails (321 , 331 ) (Figure 14(d)).

[00132] Figure 15(a) shows a first movable panel (201 ) moving backwards (i.e. in the direction of the rear panel wall) along a first front (331 ) and a first rear guide rail (341 ); the backward movement is indicated by a dashed arrow. There is a second movable panel (202) under the first panel (201 ); this second panel (202) can, for example, be positioned aligned in the plane when the roof is closed. The first panel (201 ) will be capable of moving backwards without restriction until the downward directed projection (250) of the first panel (201 ) is in contact with the upward-directed projection (240) of the second panel (202) (Figure 15(b)). This contact will ensure that the first panel (201 ) pushes the second panel (202) forward on a further backward movement of the first panel (201 ) (Figure 15(c)). A backward movement of the second panel (202) will first ensure that the second panel (202) moves upwards along a downward end of the second rear guide rail (not shown in the image). The upward movement will ensure that the groove (245) of the second panel (202) fully encloses the downward directed projection (250) of the first panel (201 ). The two adjoining panels (201 , 202) are coupled using the stacking system (encircled). The two coupled panels (201 ,202) can then move together, preferably aligned, stacked one above another, backwards on separate guide rails of the multi-track rail system (320) (Figure 15(d)).

[00133] Example 5: Roof panel

[00134] Figure 16 shows an image of a roof panel (1 100) as seen from the top side of the panel. The roof panel (1100) comprises a panel frame comprising four profiles: two main profiles (1110), in particular a front main profile (1111 ) which is arranged on the front side of the roof panel (1100) and therefore forms the front wall and a rear main profile (1112) which is arranged on the rear side of the roof panel (1100) and therefore forms the rear wall and two side profiles (1120) which are arranged on the sides of the roof panel (1100) and therefore form the sidewalls.

[00135] The roof panel (1100) also includes a panel infill (1200) attached to the frame. The panel infill (1200) is completely contained in the opening formed by the four profiles (1110, 1120). In this specific example, the panel infill is clamped by a clamping profile (1140) against the main profile (1110); this clamping is discussed in more detail in further figures. The rear main profile (1112) also includes an upward-facing reinforcement element (1180) which extends laterally from the rear main profile (1112).

[00136] Figure 17 shows a cross-section of a roof panel (1100) viewed along a side of the panel. Only the two main profiles (1110) are visible in this image.

[00137] The panel infill (1200) is clamped between the front main profile (1111 ) and the rear main profile (1112) using a plurality of clamping profiles (1140), in particular an upper clamping profile (1140a) and a lower clamping profile (1140b). The clamping profiles (1140) are coupled to the main profiles (1110) to fix the panel infill (1200). The panel infill (1200) is attached to the panel frame with a leak-proof seal (1210); the leak-proof seal comprises a plurality of seals (1210), placed between the panel infill (1200) and the clamping profiles (1140), and between the clamping profiles (1140) and the main profiles (1110). This ensures that the panel infill (1200) forms a waterproof cover. [00138] Furthermore, Figure 17 shows the presence of a roof panel gutter (1195) formed at an end of the front main profile (1111 ) of the panel frame. The roof panel gutter (1195) will ensure lateral drainage of water that will end up on the main profile.

[00139] Figure 18 shows a specific embodiment of a roof panel (1100) wherein the panel infill (1200) has a symmetrical gable roof shape. The panel infill (1200) comprises two inclined panel infill components (1200a, 1200b) which are coupled together in the ridge (1205). This embodiment will ensure that water which flows onto the top of the panel infill (1200) will flow towards the side of the roof panel (1100).

[00140] Example 6: Drainage slot

[00141] The roof panel (1100) can comprise a drainage slot (1190) in a preferred embodiment. The drainage slot (1190) is formed between the drip nose profile (1130) attached to one end of the panel infill (1200), the short side of the roof panel (1100), and a side profile (1120). This drainage slot (1190) will ensure downward drainage of water that will end up on the roof panel (1100). A drip nose profile (1130) can be provided to partially guide the water running off the roof panel (1100) along the drainage slot (1190).

[00142] Figure 19 shows an embodiment of a drip nose profile (1130) consisting of a downward-facing body along which the water can flow and a clamping space wherein the panel infill (1200) is clamped. Figure 19 also shows the placement of the nose drip profile (1130) after fixing of the panel infill (1200) in a panel frame. The opening between the drip nose profile (1130) on the one hand and a side profile (1120) of the panel frame on the other hand will form a drainage slot (1190).

[00143] Figure 20 shows a roof frame gutter (1490) of the roof device (1400). The roof frame gutter (1490) is arranged under an overhead roof panel (1100), wherein it hangs from a side of the roof frame (1410). The opening of the roof frame gutter (1490) is positioned under the drainage slot (1190), formed between a side profile (1120) and a drip nose profile (1130) of the roof panel (1100) such that the water running down can be completely collected. The upper edge of the raised sidewall of the roof frame gutter (1490) can collect the splashing water because the gap between this upper edge and the roof panel (1100) is limited to a minimum.

[00144] Example 7: Panel device and screen device

[00145] Figure 21 shows a canopy with a retractable roof device (500). The roof device (500) comprises both a panel device (510) and a screen device (530). Figure 21 A shows the roof device (500) is its most open position, with both the panel device (510) and the screen device (530) open. Figure 21 B shows a configuration wherein the roof device (500) forms a waterproof roof because the panel device (510) is closed, but where the light transmittance is not or barely reduced because the panel device (510) uses glass panels. Figure 21 C shows a configuration wherein the screen device (530) is partially closed and the panel device (510) is completely closed. In this way, the roof device (500) is waterproof and the incidence of light is partially limited. The most closed position of the roof device (500) is shown in Figure 21 D wherein both the panel device (510) and the screen device (530) are completely closed. In this way, the roof device (500) is waterproof and not translucent.

[00146] The structure of the individual panels and/or the structure and functioning of the panel device (510), and the associated advantages, are identical to the roof devices described with reference to examples 1 to 6 and are therefore not anymore described here. In this way, the panel device (510) can make use of a single-track or multi-track rail system and/or the described stacking systems and/or the connection systems and/or the described panels, optionally with the described drainage.

[00147] Further details of the roof device (500) are described with reference to Figures 22 and 23. The roof device (500) comprises a roof frame formed by pivot beams (502) and tension beams (504), commonly referred to as beams (502, 504), of which one each is shown in Figure 22. The panel device (510) comprises a plurality of panels (512), three in the embodiment shown, stacked one above another in their open position (Figure 22A) and next to one another in a plane in their closed position (Figure 22B). Preferably, the lower panel (512) is firmly connected to the tension beam (504), which improves the waterproofness of the panel device (510). The pivot beam (502) has a rail system (not shown) as described above for guiding the panels (512).

[00148] Underneath the panel device (510) is a screen device (530) comprising a screen (532), also referred to as a canvas. The screen (532) can be rolled in and out and, in its rolled-in position, is housed in a housing (534) that is firmly attached to the tension beams (504). The pivot beams (502) are also provided with a screen guide (536) which is also part of the screen device (530). The top of the screen guide (536) can also serve as a roof frame gutter (1490) to collect precipitation discharged from the panel device (510). It is clear that the screen (532) can also be moved to any position between its open and closed position as shown in Figure 22A wherein the screen (532) is not fully rolled in such that the panels (512) are not visible in their closed position. In Figure 22B the screen (532) is located entirely under the gutter (1490) and the screen guide (536) is incorporated in the bottom of the gutter (1490), but in other embodiments the screen (532) can also mainly be located next to the gutter (1490) in which case the screen guide (536) will be incorporated in the raised sidewall of the gutter (1490) as shown in Figure 23. The only condition to prevent the screen (532) from coming into contact with drained precipitation is that the screen (532) is not higher than the top edge of the gutter (1490). [00149] The beams (502, 504) are typically made up of one or more profiles as illustrated in Figure 23. The profiles are typically made of a rigid material. This can be aluminium, for example. Aluminium has many advantages as a profile material, as it is both robust and light, resistant to adverse weather conditions and requires little maintenance. However, other materials are also suitable and their advantages or disadvantages are assumed to be known to the person skilled in the art. A profile can be produced using various techniques depending on the material, including extrusion, milling, setting, casting, welding, etc., wherein extrusion is preferred. The appropriate production technique is assumed to be known to the person skilled in the art. To form the beams (502, 504), the profiles are connected in a specific way. In general, pin connections (also known as click connections) and/or hook connections are used. A pin connection typically contains an elastic element (not shown) in a female element, for example a slot element, in which a male element, for example a pin, grips. Hence, a pin connection generally comprises an elastic interlocking male and female element for this purpose an additional elastic element can be provided, but this is not necessarily the case. The elasticity can also arise from the design of the male and female elements. In a hook connection, there are typically two elements with a design such that they hook into one another. This does not involve an elastic element and the connection is dismantled by moving the elements away from one another in the correct direction. It should therefore be clear that the wording “integrated into” should not be considered as "integrally formed", but on the contrary that this may also mean that a separate profile with specific functionality (e.g. a screen guide) is attached to one or more other profiles that are part of the beams.

[00150] The use of the roof frame for both the attachment of the panel device (510) and the screen device (530) renders the roof device relatively compact, in particular, the system has a limited height, given that both systems (510, 530) are integrated in a single roof device.

Claims

1 . Roof device (500) for a canopy, the roof device (500) comprising:

- a frame provided with a pair of first beams (502) located opposite one another;

- a panel device (510) fixed onto the frame, wherein the panel device (510) comprises a plurality of stackable panels (512) slidable between an open position and a closed position, wherein the panels (512) in their closed position form a substantially waterproof roof; and

- a screen device (530) fixed onto the frame, which screen device (530) is located underneath the panel device (510), wherein the screen device (530) comprises at least one screen (532) movable between an open position and a closed position, wherein the screen (532) in its open position is substantially invisible and wherein the screen (532) in its closed position covers the panels (512) substantially completely, wherein at least one, preferably both, of the first beams is provided with:

- a rail system configured to guide the panels (512) between their open and closed position;

- a screen guide (534) configured to guide the screen (532) between its open and closed position; and

- a gutter (1490) designed to collect precipitation discharged from the panel device (510), which gutter is located between the rail system and the screen (532).

2. Roof device (500) according to claim 1 , wherein the gutter has a bottom and a raised wall, wherein the top of the raised wall is located above the screen in the closed position of the screen.

3. Roof device (500) according to claim 2, wherein the screen guide is integrated into the bottom or raised wall of the gutter.

4. Roof device (500) according to one of the preceding claims, wherein the rail system comprises one or more tracks in a first of said first beams and comprises one or more corresponding tracks in a second of said first beams, wherein each panel is guided on both sides in one of said one or more tracks and one of said one or more corresponding tracks.

5. Roof device (500) according to one of the preceding claims, wherein the screen guide (534) comprises a first screen guide in a first of said first beams and a corresponding second screen guide in a second of said first beams, wherein the screen is guided on both sides in the screen guide and the corresponding screen guide.

6. Roof device (500) according to claim 5, wherein the screen guide or the corresponding screen guide is integrated into the gutter, in particular into a raised wall of the gutter or into the bottom of the gutter.

7. Roof device (500) according to one of the preceding claims, wherein the frame also comprises a pair of second beams (504) which are located opposite one another, wherein the first beams and the second beams together form nearly a rectangle.

8. Roof device (500) according to claim 7, wherein at least one of the second beams (504) is provided with a housing to maintain the screen (532) in its open position.

9. Roof device (500) according to claim 7 or 8, wherein at least one panel of the plurality of panels (512) is fixed to one of the second beams (504).

10. Roof device (500) according to one of the preceding claims, wherein the roof device (500) comprises a control system configured to control the panel device (510) and the screen device (530).

11. Roof device (500) according to claim 10, wherein the control system is configured for the mutual independent control of the panel device (510) and the screen device (530).

12. Roof device (500) according to one of the preceding claims, wherein the plurality of panels (512) is divided into two sets, positioned relative to one another, which sets are preferably symmetrical relative to one another such that, in their closed position, they each form nearly half of the roof, and wherein at least one screen (532) is formed by two screens positioned relative to one another, which screens are preferably symmetrical relative to one another such that, in their closed position, they each cover nearly half of the roof.

13. Roof device (500) according to one of the preceding claims, wherein said at least one screen (532) is formed by two or more screens, which screens are preferably positioned relative to one another, at opposite ends of the roof device, wherein, further preferably, the screens are symmetrical relative to one another such that, in their closed position, they each cover nearly half of the roof.

14. Roof device (500) according to one of the preceding claims, wherein the sliding direction of the panels (512) is nearly identical to the sliding direction of the screen (532).

15. Roof device (500) according to one of the preceding claims, wherein the screen (532) is retractable, wherein the open position is formed by the screen (532) in its rolled-in position and wherein the closed position is formed by the screen (532) in its rolled-out position.

16. Roof device (500) according to one of the preceding claims, wherein the panels (512), in their closed position, are located aligned next to each other in the same plane and, in their open position, are stacked aligned one above another.

17. Roof device (500) according to one of the preceding claims, wherein the panels (512) comprise a connection element (220) and a connection point (225), wherein the connection element (220) of each panel (512) is arranged for coupling and decoupling with a connection point (225) of an adjoining panel.

18. Roof device (500) according to one of the preceding claims, wherein said frame is substantially rectangular.

19. Roof device (500) according to one of the preceding claims, wherein the screen extends nearly horizontally in its closed position and/or wherein the panels extend nearly horizontally in their closed position.

20. Canopy with the roof device (500) according to one of the preceding claims.