EP3388612B1 - Device and method for covering an area of a building, in particular a window of a building - Google Patents

Description

Technical field

The present invention relates to a device and a method for operating the device for covering a building area, in particular a window of a building.

Background of the Invention

On the one hand, modern buildings must have new forms of design and, on the other hand, they must offer high functionality. The design of the facade, as a particularly large component and as a shell of the building that is visible from the outside, is very often the focus of architectural concepts in this task. The design of these facades always deviates from the normal, rectangular facade and glass surface structure. For example, modern windows have round or polygonal glass surfaces. Since the facade always takes on a technical function for the building in addition to its design function, the design of facades is currently subject to technical limits and specifications. An important requirement is to integrate a movable and easily adjustable sun protection (e.g. by means of a venetian blind / venetian blind) into the building envelope.

DE 199 30 634 A1 discloses a blind that can be attached to a complex window. The blind has traction elements on which a plurality of slats is arranged. The slats are arranged diagonally in front of the window. An end rail is coupled to the traction elements.

US 2011/203 744 A1 discloses a blind with several slats. The slats can be formed in several parts and their length can be adjusted. the slats are slidably attached to corresponding guide cables.

Presentation of the invention

It is an object of the present invention to provide a covering system for building areas with complex shapes.

This object is achieved with a device for covering a building area, in particular a window of a building, and a method for operating the device according to the subject matter of the independent claims.

According to a first aspect, a device (for example a blind or an external venetian blind) for covering a building area, in particular a window of a building, is provided. The device has a first guide strand, a second guide strand and at least one lamella. The lamella has a first coupling point, by means of which the lamella is coupled to the first guide strand in such a way that the lamella can be guided at least along the first guide strand. The lamella also has a second coupling point, spaced in the longitudinal direction of the lamella from the first coupling point, at which the lamella is coupled to the second guide strand. The slat is designed to be adjustable in the longitudinal direction in such a way that the length of the slat between the first guide strand and the second guide strand can be adjusted or changed during guiding in the guide direction along, for example, the first guide strand.

According to a further aspect, a method for operating an above-described device for covering a building area, in particular a window of a building, is described.

The first guide strand or the second guide strand consist, for example, of a rope, in particular a steel rope, a guide rail, a guide rod or a guide chain. The first and second guide strands are, in particular, in a tensioned or prestressed state. The guide strands can be tensioned, for example, between two fixed points on the building. Furthermore, a weight can be arranged at the lower end of a guide strand in order to pretension the corresponding guide strand due to the weight and a guide hole. The first and the second guide run run in particular parallel to the lateral edges of the building area to be covered.

The building area can represent, for example, a window of a building. In the present case, the building area can have, for example, a trapezoidal shape, a parallelogram shape, a triangular shape or a curve. The first and the second guide track can be guided along the outer edges of the building area to be covered. For example, a counter-pull system can be provided which actively pulls the slats or the end bar in the direction of gravity. For example, the end bar is pulled out of a prestressed spring shaft (or similar tensioning system) in the direction of gravity by means of a rope over a deflection roller.

The device has at least one lamella. Correspondingly, in order to completely cover a building area, the device can have a plurality of slats, in particular adjustable in its longitudinal direction exhibit. As described above, at least one lamella has first and second coupling points for coupling to the corresponding guide strands. A coupling point can be formed, for example, by means of a hole in the lamella. Alternatively, a coupling point can be formed by means of an eyelet or a sleeve which is formed or attached to the lamella.

The lamellae can for example be made of a metal, in particular a light metal such as aluminum. Furthermore, the slats can also be made of plastic materials. In particular, the slats can be made from organic materials, such as wood materials.

The term "longitudinal direction" describes the direction in which the lamella extends lengthwise. If the lamella is coupled to the first and second guide strands, the longitudinal direction essentially runs between the two guide strands.

The term “guide direction” describes the direction in which the slats are guided along the guide strands. The slats can be moved along the first and the second guide track in such a way that in an open position the building area is not covered by the slats and in a closed position the building area is covered by the slats. The slats are moved along the guide direction between the open position and the closed position.

Furthermore, at least one slat, several slats of the device or all slats of the device are designed to be adjustable in the longitudinal direction. For example, the lamella can be elastically deformable (ie compressible and stretchable) in the longitudinal direction. Additionally or alternatively, the lamella, as described below, telescopic or accordion-like in and out.

With the device described above and in particular with the novel longitudinally adjustable slat, the possibility is created to cover complex forms of building areas and in particular to shade them. The first guide line and the second guide line can run along the complex side boundary of a building area. The distance between the first guide strand and the second guide strand can vary along the guide direction. If the slat now travels along the first guide strand and the second guide strand, it adjusts itself to the respective distance between the first guide strand and the second guide strand due to its deformability in the sense of longitudinal adjustability. Thus, the slat always sets the desired length to optimally cover the building area at a certain position along the guide direction.

In the conventional approaches for covering a building area, for example, slats that cannot be adjusted lengthways are used. It is therefore necessary to adapt all the slats to the widest part of the building area in order to cover the widest area of the building area, especially when the slats are partially extended. In the narrower areas of the building area, however, the slats protrude significantly laterally over the building area. This leads to a less aesthetic appearance of the entire building.

With the approach according to the invention, a longitudinally adjustable slat is used and is accordingly guided along the building area. At a narrower distance from the building area, there is a smaller distance between the first and the second guide track. Because of the guidance of the slat along the first and second guide strands, the length of the adjustable slat is thus reduced. With a wider section of the Building area increases the length of the lamella due to the greater distance between the first guide line and the second guide line or due to the larger distance of the corresponding first and second coupling points. The slat is thus adapted to narrow and wider areas of the building area to be covered, so that a lateral protrusion of a slat beyond the building area, for example in the window, is not necessary.

According to the present invention, the first guide line and the second guide line are arranged, in particular on the building area, in such a way that a distance between the first guide line and the second guide line changes at least partially in the guide direction.

According to an exemplary embodiment, the lamella has a first lamella part on which the first coupling point is formed and a second lamella part on which the second coupling point is formed. The first lamellar part is coupled to the second lamellar part in such a way that the first lamellar part can be displaced in the longitudinal direction relative to the second lamellar part. Thus, a telescope-like or accordion-like slat that can be extended and retracted in the longitudinal direction is provided. In a further exemplary embodiment, the lamella can, for example, additionally have a third lamella part and the device can additionally have a third guide strand. The third slat part can, for example, be movable relative to the first slat part and the second slat part. The third lamella part is also guided along the third guide strand by means of a third coupling point. A large number of further guide strands and associated lamella parts can accordingly be arranged.

According to a further exemplary embodiment, at least the first slat part or the second slat part has a hollow profile, in which the other first slat part or second slat part can be inserted and moved in the longitudinal direction.

According to a further exemplary embodiment, the second (or the first) lamella part has two grooves running in the longitudinal direction, in particular parallel to one another, and spaced apart from one another. The first (or the second) slat part has two edges which run in the longitudinal direction and are spaced apart, in particular run parallel to one another, which can be guided and moved in the grooves of the second slat part.

According to a further exemplary embodiment, at least one of the grooves is formed by means of edge flanging or edging of the second lamella part. The term “edge flanging” is understood in particular to mean that the first or the second lamella part has edges folded or deformed by means of flanging, wherein these folded edges each form a groove-like shape.

According to a further exemplary embodiment, the first lamella part has a first surface shape, for example a first curved surface shape, which corresponds to a second surface shape, for example a second curved surface shape, of the second lamella part. If the first slat part and the second slat part form the same or similar surface shape, both slat parts form the impression of a uniformly shaped slat in the extended state. In other words, one slat part nestles against the other slat part, so that the slat has a homogeneous appearance.

According to a further exemplary embodiment, the second guide strand is fixed to the lamella at the second coupling point, the second guide strand being movable in the guide direction in such a way that the lamella can be moved along the guide direction. Thus, for example, the second guide strand pushes and / or pulls the lamella against or in the direction of gravity between the open position and the closed position. In this embodiment, the first guide strand takes over the guidance of the lamella. The lamella therefore moves relatively exclusively to the first guide strand. Depending on the relative position between the first coupling point on the first guide strand, the length of the lamella is adjusted in the longitudinal direction along the first guide strand.

Alternatively, the second guide strand can be coupled to the second coupling point of the lamella corresponding to the first guide strand in such a way that the lamella is moved along the second guide strand during guidance in the guide direction. In a corresponding embodiment, a further drive train for pushing and / or pulling the lamella along the guiding direction is then provided, as described further below.

According to a further exemplary embodiment, the device has an installation device which is designed for fastening to the building area or the window. The first guide strand and / or the second guide strand are coupled to the installation device. The installation device can, for example, be box-shaped, so that installation space for attaching necessary control and drive mechanisms is formed in an inner volume of the installation device. The first guide strand and / or the second guide strand can be fastened in or on the installation device by means of corresponding fastening elements. In particular, the fasteners in the longitudinal direction be adjustable or displaceable relative to the installation device. The distance between the first guide line and the second guide line can thus be set flexibly, so that the device can address different shapes of the building areas to be covered.

According to a further exemplary embodiment, the device further has a termination element and a drive train. The drive train is fastened to the terminating element and in particular is arranged between the first guide train and the second guide train. The drive train is coupled to the installation device so that it can be extended and retracted. The lamella (or the plurality of lamellae) is arranged between the closure element and the installation device, the closure element being movable in the guide direction by means of the drive train in such a way that the closure element contacts the lamella in the guide direction and pulls or pushes in the guide direction during the method.

The end bar (or the end element) can also hang on its own without direct contact with a slat in a ladder cord (as described below). The end element then serves to provide a necessary weight for the function of the gravity system. In other words, the terminating element thus tensions the drive train or the guide trains. A tension weight element can also be introduced into the end element. This weight can also be used for trimming.

When using a counter-pull system, in which the slats are mechanically pulled in the direction of gravity, a pull rope is attached to the end bar, for example, which then runs, for example, to a prestressed spring shaft.

The end bar is then pulled down by the tensioned spring shaft. Upwards, the drive mechanism described below works against the spring shaft to pull up the slats.

The drive train is particularly fastened in the installation device. A drive mechanism can be provided in the installation device, which drives the drive train in the guide direction or rolls it up and down. The drive mechanism can be, for example, a mechanical mechanism that can be operated manually. For example, the drive mechanism can be operated manually by means of a drive belt or a crank. Additionally or alternatively, the drive mechanism can have a drive motor, in particular an electric motor.

In other words, the closure element acts as a driver and pushes the slats from the closed position into the open position, in which the closure element presses the slats in particular against the installation device. The closing element can also be lowered in order to move the slats from the open position into the closed position. The slats move automatically along the first guide strand, in particular due to their gravity.

The closing element can, for example, represent a lamella which extends in the longitudinal direction and is moved by means of the drive train. The terminating element can in particular be coupled to the first guide strand and the second guide strand. In an exemplary embodiment, the terminating element is smaller than the smallest distance between the first guide strand and the second guide strand.

In a further exemplary embodiment, the terminating element likewise forms an above-described, length-adjustable lamella, for example the terminating element being coupled to the first guide train at a first coupling point and being fixed to the drive train at a second coupling point.

According to a further exemplary embodiment, the lamella has a guide opening, in particular an elongated hole extending in the longitudinal direction of the lamella as a guide opening, through which the drive train is guided. In particular, the guide opening is formed in the first lamella part, the drive train being able to be guided through the second lamella part through a further opening without play or a relative displacement in the longitudinal direction between the second lamella part being provided for the drive train. In this embodiment, it is possible for the first lamella part to move in the longitudinal direction relative to the drive train without the drive train blocking the displacement of the first lamellar part due to the guidance within the guide opening.

According to a further exemplary embodiment, the device has a plurality of slats, in particular the above-described, length-adjustable slats, which are arranged between the closure element and the installation device. The closing element can be moved in the guide direction by means of the drive train in such a way that the closing element contacts at least one of the lamellae in the guide direction during the method and displaces at least one lamella in the guide direction.

According to a further exemplary embodiment, the device has a trim weight which is arranged on the lamella in such a way that the Center of gravity of the lamella between the first guide strand and the second guide strand is adjustable.

The trim weight can be made from lead or other heavy material, for example. The trim weight can be attached to a slat, for example, by means of an adhesive connection. Furthermore, the trim weight can be exchangeably attached to the slat, for example by means of a screw connection, a clamp connection or a magnetic connection.

According to a further exemplary embodiment, the trim weight can be adjusted in particular in the longitudinal direction. The trim weight can be adjusted in particular in the longitudinal direction by means of an adjusting mechanism as a function of an adjusted length of the slat. The trim weight can, for example, be guided along guide grooves and moved in the longitudinal direction. In particular, the trim weight can engage in the same grooves as, for example, the first lamella part described above.

According to a further exemplary embodiment, the device has an adjustment mechanism which is set up to shift the trim weight of a slat in the longitudinal direction of the slat, in particular as a function of the overall length or of the position of the center of gravity of the slat. In this case, for example, a cable pull mechanism can be provided on a slat, which connects the first coupling point to the trim weight in such a way that when the first coupling point is displaced, the trim weight is shifted into a desired position along the longitudinal direction of the slat. A shift in the center of gravity of the lamella due to the change in its overall length can thus be compensated for.

According to a further exemplary embodiment, the device has a conductor cord. The conductor cord has a first conductor strand and a second conductor strand, the first conductor strand and the second conductor strand running parallel to one another. Between the first conductor strand and the second conductor strand, a receiving tab (for example by means of cords running transversely in the width direction of the lamella, which are each fastened to the first and the second conductor lane) is formed for receiving the lamella. By adjusting in the guide direction of the first conductor strand relative to the second conductor strand, the receiving tab can be deformed such that the lamella can be rotated about an axis of rotation which runs parallel to the longitudinal axis of the lamella. The shading effect of the slats can thus be adjusted by adjusting the receiving tab.

In an exemplary embodiment, the adjustment or movement of the slats of the device is based on gravity mechanics. This means that the slats move from above into the closed position with the aid of gravity and are pulled upwards against the force of gravity by a drive (manual or electric) into the open position. For example, in addition or as an alternative, a counter-pulling mechanism can be provided which actively pulls the slats or the end bar in the direction of gravity. For example, the end bar is pulled out of a prestressed spring shaft (or similar tensioning system) in the direction of gravity by means of a rope via a deflection roller. Furthermore, the counter-pull mechanism can have electric motors for pulling out the slats in the direction of gravity.

The slats can be turned in any position using the ladder cord, which regulates the incoming sunlight. The solution according to the invention can be applied independently of the slat type and slat width and is aimed at all external and internal blinds / venetian blinds as a device. The external venetian blind / blind system consists of the top bar or the Installation device which contains the drive for the drive train, the turning shaft and the turning mechanism, in particular for the conductor cord, and the upper fastening point for the guide system of the device. The device also has the curtain with the slats, the end bar (connecting element) and the belts (conductor cords, drive train), which in turn are attached to the turning mechanism of the upper bar (installation device) and the guide system (i.e. the guide strands) that guides the slats and holds them in position on the facade in the event of external influences.

Each or some of the slats are designed as telescopic slats in such a way that a suitable first slat part is inserted into the respective second slat part on the underside, for example, the first slat part being able to slide in and out within a guide (for example guide grooves) under the second slat part while the slats move up and down. The contour of the first slat part is adapted to the second slat part and the width and material thickness of the first slat part are designed so that it can slide underneath the second slat part and is not too loose or too tight. The guidance of the first lamellar part in the second lamellar part can be implemented within an edge flange of the second lamellar part or can be implemented in a specially incorporated separate component. The entire slat length can be changed by sliding the first slat part into and out of the second slat part. So that the length of the slats changes according to the edge run of the glass surface to be shaded by retracting or extending the first slat part, the first slat part is guided on a steel cable, a rod or a guide rail as the first guide strand. The first guide strand is attached to the facade at a corresponding angle relative to the horizontal plane, usually parallel to the edge course of the surface to be shaded. This guidance along the first guide strand pulls the first Slat part when moving out of the second slat part or pushes the first slat part into the second slat part when moving in.

The end bar (end element) of the device is not necessarily equipped with a telescopic function. Their length can be measured by the length of the lowest lamella or the second lamella part of the lower lamella. The first slat part is milled out in the rear, i.e. in each part, which enters the second slat part (e.g. to form a guide opening) in such a way that when the first slat part slides in / out it is ensured that the second slat is not in contact with the tension band ( ie the drive train) of the device collides. Since the first slat part slides in particular below the second slat part, it is automatically ensured that the first slat part does not collide with the conductor cord of the device.

Furthermore, the slats can each be equipped, for example, with a trim weight that is connected to the slat, for example, is inserted or glued to the underside of the slat. This trim weight is dimensioned and matched to the respective weight distribution of the slat. Correcting the weight distribution of each individual slat ensures the correct weight distribution within the entire blind / venetian blind system or the device. This ideal weight distribution can also be achieved by geometric or material design of the slat. The drive of the lamellae is matched to the total weight of the device with regard to the required torque. Likewise, the drawstring (drive train) and the turning mechanism (the conductor cord and turning bearing) must be matched to the requirements of the device.

Brief description of the drawings

• Fig. 1 eine schematische Darstellung einer Vorrichtung gemäß einer beispielhaften Ausführungsform der vorliegenden Erfindung,
• Fig. 2 eine schematische Darstellung einer ausfahrbaren Lamelle gemäß einer beispielhaften Ausführungsform der vorliegenden Erfindung,
• Fig. 3 eine schematische Darstellung einer ausfahrbaren Lamelle einschließlich einem Antriebsstrang und einer Leiterkordel gemäß einer beispielhaften Ausführungsform der vorliegenden Erfindung,
• Fig. 4 eine schematische Darstellung einer ausfahrbaren Lamelle aufweisend zwei Leiterkordeln und einem Trimmgewicht gemäß einer beispielhaften Ausführungsform der vorliegenden Erfindung, und
• Fig. 5 eine schematische Darstellung einer Lamelle aufweisend ein Trimmgewicht gemäß einer beispielhaften Ausführungsform der vorliegenden Erfindung.

In the following, exemplary embodiments are described in more detail with reference to the accompanying drawings for further explanation and for a better understanding of the present invention. Show it:

• Fig. 1 2 shows a schematic representation of a device according to an exemplary embodiment of the present invention,
• Fig. 2 1 shows a schematic illustration of an extendable slat according to an exemplary embodiment of the present invention,
• Fig. 3 1 shows a schematic illustration of an extendable lamella including a drive train and a conductor cord according to an exemplary embodiment of the present invention,
• Fig. 4 2 shows a schematic illustration of an extendable lamella having two conductor cords and a trim weight according to an exemplary embodiment of the present invention, and
• Fig. 5 is a schematic representation of a lamella having a trim weight according to an exemplary embodiment of the present invention.

Detailed description of exemplary embodiments

The same or similar components in different figures are provided with the same reference numbers. The representations in the figures are schematic.

Fig. 1 shows a schematic representation of a device for covering a building area, in particular a window 130 of a building. The device has at least one lamella 100. Furthermore, the device has a first guide strand 110 and a second guide strand 120. The lamella 100 has a first coupling point 111, by means of which the lamella 100 is coupled to a first guide strand 110 in such a way that the lamella 100 can be guided at least along the first guide strand 110. The lamella 100 has a second coupling point 122, spaced in the longitudinal direction 106 of the lamella 100 from the first coupling point 111, at which the lamella 100 is coupled to the second guide strand 120. The slat 100 is designed to be adjustable in the longitudinal direction 106 in such a way that a length of the slat 100 between the first guide strand 110 and the second guide strand 120 can be adjusted while guiding in the guide direction 105 along the first guide strand 110.

In Fig. 1 Three slats 100, 100 ', 100 "are shown by way of example, which have the same features in the exemplary embodiment. It can be seen here that, when extended, the lowest slat 100 has a greater length in the longitudinal direction 106 than the uppermost slat 100" . Corresponding to the complete covering of the window 130, the device can have a plurality of slats 100, 100 ', 100 ", in particular adjustable in its longitudinal direction.

The first guide strand 110 or the second guide strand 120 consist, for example, of a rope, in particular a steel rope, a guide rail, a guide rod or a guide chain. The first and second guide strands 110, 120 are in particular in a tensioned or pretensioned state.

In the present example in Fig. 1 the window 130 to be covered is trapezoidal or diamond-shaped. In order to cover the window with the retractable and extendable slats 100 according to the invention, the first guide strand 110 runs almost parallel with a side edge of the window 130. The second guide strand 120 runs along the direction of gravity. As can be seen from the lower slats 100, 100 ', an overlap of the slats 100, 100' is produced at the lower end of the window 130. In an exemplary embodiment, the second guide strand 120 can likewise run parallel to a side edge of a building area. The first guide strand 110, 120 can be pretensioned by means of a pretensioning weight 112 'or can be firmly fixed to the building by means of a pretensioning element 112. In other words, the guide strands 110, 120 can be stretched between two fixed points on the building, for example.

As described above, the at least one lamella 100 has first and second coupling elements for coupling to the corresponding guide strands 110, 120 second coupling points 111, 122. A coupling point 111, 122 can be formed, for example, by means of a hole in the lamella.

The term “longitudinal direction 106” describes the direction in which the lamella 100 extends lengthwise. If the lamella 100 is coupled to the first and second guide strands 110, 120, the longitudinal direction 106 essentially runs between the two guide strands 110, 120.

The term “guide direction 105” describes the direction in which the slats 100 are guided along the guide strands 110, 120. The slats 100 can be moved along the first and the second guide strand 110, 120 such that the window 130 is not covered by the slats in an open position and the window 130 is covered by the slats in a closed position. The slats 100 are moved along the guide direction 105 between the open position and the closed position.

The longitudinally adjustable slat 100 is guided along the window 130. At the upper end of the device, there is a smaller distance between the first and second guide strands 110, 120. Because the slats 100, 100 ', 100 "are guided along the first and second guide strands 110, 120, the length of the adjustable slats 100, 100', 100" is reduced. In the case of a wider section, the length of the lamellae 100, 100 ′, 100 ″ is lengthened because of the greater distance between the first guide strand 110 and the second guide strand 120 or because of the greater distance between the corresponding first and second coupling points 111, 122.

The left guide strand 110 is arranged outside the window 130 and, in the exemplary embodiment, runs parallel to a side edge of the window 130. The guide strand 110 is firmly attached to the guy element 112 Building fixed. The right guide strand 120 is preloaded in the direction of gravity by means of a preload weight 112 '. The guide strand 120 runs inside the window 130.
The plate 100 has a first plate part 101, on which the first coupling point 111 is formed, and a second plate part 102, on which the second coupling point 122 is formed. The first lamellar part 101 is coupled to the second lamellar part 102 in such a way that the first lamellar part 101 can be displaced in the longitudinal direction 106 relative to the second lamellar part 102. A slat 100 which can be telescoped in and out in the longitudinal direction 106 is thus provided. The second lamella parts 102, 102 ′, 102 ″ can have different lengths from one another.

The device also has an installation device 103, which is designed for attachment to the building area, in particular above the window 130. The first guide strand 110 and / or the second guide strand 120 are coupled to the installation device 103. The installation device 103 is box-shaped, so that installation space for attaching control and drive mechanisms is formed in an inner volume of the installation device 103. The first guide strand 110 and / or the second guide strand 120 can be fastened in the installation device 103 by means of corresponding fastening elements 113, 123. In particular, the fastening elements 113, 123 can be arranged to be adjustable or displaceable in the longitudinal direction 106 relative to the installation device 103. Thus, the distance between the first guide line 110 and the second guide line 120 can be set flexibly, so that the device can deal with different shapes of the building areas to be covered.

The device also has a terminating element 104 (terminating strip) and a drive train 107. In the exemplary embodiment, the Device further has a further second drive train 107 '. The drive train 107, 107 ′ is fastened to the terminating element 104 and in particular is arranged between the first guide train 110 and the second guide train 120. The drive train 107, 107 'is coupled to the installation device 103 so that it can be extended and retracted. The lamella 100 (or the plurality of lamellae 100 ′, 100 ″) is arranged between the closure element 104 and the installation device 103, the closure element 104 being movable in the guide direction 105 by means of the drive train 107, 107 ′ in such a way that the closure element 104 is the lamella 100 contacted during the process in guide direction 105 and shifted in guide direction 105.

The drive train 107, 107 'is particularly fastened in the installation device 103. A drive mechanism 118, 118 'can be provided in the installation device 103, which drives the drive train 107, 107' in the guide direction 105 or rolls it up and down.

In other words, the closing element 104 acts as a driver and pushes the slats 100, 100 ', 100 "from the closed position into the open position in which the closing element 104 moves the slats 100, 100', 100" in particular against the installation device 103. The closing element 104 can also be lowered in order to move the slats 100, 100 ', 100 "from the open position into the closed position. The slats 100, 100', 100" move automatically along the first guide strand, in particular due to their gravity.

In the exemplary embodiment, the terminating element is smaller than the smallest distance between the first guide strand 110 and the second guide strand 120.

The lamella 100 has a guide opening 108, in particular an elongated hole extending in the longitudinal direction 106 of the lamella 100 as a guide opening 108, through which the drive train 107 is guided. In particular, the guide opening 108 is formed in the first lamellar part 101, the drive train 107 being able to be passed through the second lamellar part 102 through a further opening in without any play or relative displacement in the longitudinal direction 106 between the second lamellar part 102 and the drive train 107 is provided. In this embodiment, it is possible for the first lamella part 101 to move in the longitudinal direction 106 relative to the drive train 107 without the drive train 107 blocking the displacement of the first lamella part 101 due to the guidance within the guide opening 108.

A trim weight 109 is also provided on the lamella 100, which is arranged such that the center of gravity of the lamella 100 can be adjusted between the first guide strand 110 and the second guide strand 120.

The trim weight 109 can, for example, be attached to a lamella by means of an adhesive connection.

The device also has two conductor cords 114. The conductor cord 114 has a first conductor strand 115 and a second conductor strand 116, the first conductor strand 115 and the second conductor strand 116 running parallel to one another. Between the first conductor strand 115 and the second conductor strand 116, a receiving tab 117 (for example by means of transverse cords, which are each fastened to the first and the second conductor strand 115, 116) is formed for receiving the lamella 100. By adjusting in the guide direction 105 of the first conductor strand 115 relative to the second conductor strand 116, the receiving tab 117 can be deformed such that the lamella 100 is one Rotation axis, which runs parallel to the longitudinal axis 105 of the lamella, is rotatable. The shading effect of the slats 100, 100 ', 100 "can thus be adjusted by adjusting the receiving tab 117. For example, a cord mechanism 119 is provided in the installation device 103, which has a reversible bearing in order to adjust the conductor strands 115, 116 and the slats 100 accordingly "100 ', 100" with it.

Fig. 2 shows a more detailed illustration of an extendable slat 100, which for example is in the device Fig. 1 is used. The second lamella part 102 has two grooves 201 which run in the longitudinal direction 106, in particular parallel to one another, and are spaced apart from one another. The first lamellar part 101 has two edges which run in the longitudinal direction 106 and are spaced apart, in particular parallel to one another, which can be guided in the grooves 201 of the second lamellar part 102.

At least one of the grooves 201 is formed by edge flanging the second lamella part 102.

The first lamella part 101 has a first surface shape, in particular a first curved surface shape, which corresponds to a second surface shape, in particular a second curved surface shape, of the second lamella part 102. In the width direction 202, which runs essentially orthogonally to the longitudinal direction 206, the first slat part 101 and the second slat part 102 form the same or similar surface shape, so that in the extended state, both slat parts 101, 102 form the impression of a uniformly shaped slat 100.

Fig. 3 shows a more detailed illustration of an extendable slat 100, which for example is in the device Fig. 1 is used. The first slat part 101 can be moved into the second slat part in the longitudinal direction 106. The drive train 107 runs through the first lamellar part 101 and the second lamellar part 102. For this purpose, the second lamellar part 102 has a conventional round through hole. The first lamella part 101 has a guide opening 108 which extends in the longitudinal direction 106. The first lamella part 101 can thus be adjusted along the longitudinal direction 106 without being influenced by the drive train 107.

The conductor cord 114 is also shown in more detail. The receiving tab 117, through which the lamella 100 is guided, is formed between the first conductor strand 115 and the second conductor strand 116. The receiving tab 117 is formed by cords running in the width direction 202, the cords being fastened to the first and second conductor strands 115, 116.

Fig. 4 shows a more detailed illustration of an extendable slat 100, which for example is in the device Fig. 1 is used. The lamella 100 out Fig. 4 has the same features as the slats 100 Fig. 1 , 2 and 3 on. In addition, it is shown that a further drive train 107 'as well as a further conductor cord 114' can be arranged in the longitudinal direction 106. The second lamella part 102 has a trim weight 109 in an edge region. The trim weight 109 compensates for a shift in the center of gravity of the lamella 100, which is caused by its 101 being extended from the second lamella part 102. It also becomes clear that the first guide strand 101 can be stored and displaced, for example, along two opposite grooves 201.

Fig. 5 shows a sectional view of a lamella 100 having a trim weight 109. The trim weight 109 can, for example, in the grooves 201 of the second slat part 102, in which the first slat part 101 can also be tracked. The trim weight 109 can be moved, for example, along the grooves 201 in the longitudinal direction 106. Thus, for example, a center of gravity of a lamella 100 can be adjusted in a simple manner. <u> List of reference symbols: </u> 100 Slat 201 Groove 101 first slat part 202 Width direction of a slat 102 second slat part 103 Installation device 104 Finishing element 105 Leadership direction 106 Longitudinal direction 107 Powertrain 108 Guide opening 109 Trim weight 110 first leadership strand 111 first coupling point 112 Guy element, 112 ' Preload weight 113 first fastener 114 Ladder cord 115 first conductor strand 116 second conductor strand 117 Mounting tab 118 Drive mechanism 119 Cord mechanism 120 second leader 122 second coupling point 123 second fastener 130 window

Claims (13)

1. Device for covering a building area, in particular a window of a building, the device having:

   a first guide strand (110),

   a second guide strand (120),

   at least one lamella (100),

   wherein the lamella (100) has a first coupling point (111), by which the lamella (100) is coupled to the first guide strand (110) in such a way that the lamella (100) is guidable at least along the first guide strand (110),
   wherein the lamella (100) has a second coupling point (122), which is spaced in a longitudinal direction (106) of the lamella (100) from the first coupling point (111) and at which the lamella (100) is coupled to the second guide strand (120),
   wherein the lamella (100) is configured to be adjustable in the longitudinal direction (106) in such a way that a length of the lamella (100) between the first guide strand (110) and the second guide strand (120) is adjustable during the guiding in a guide direction (105) along the first guide strand (110), characterized in that
   the first guide strand (110) and the second guide strand (120) are arranged in such a way that a distance between the first guide strand (110) and the second guide strand (120) changes at least partially in the guide direction (105), wherein the lamella (100), when moving along the first guide strand (110) and the second guide strand (120), is adjustable to the respective distance between the first guide strand (110) and the second guide strand (120) due to its longitudinal adjustability.
2. Device according to claim 1,
   wherein the lamella (100) has a first lamella part (101), at which the first coupling point (111) is formed, and a second lamella part (102), at which the second coupling point (122) is formed,
   wherein the first lamella part (101) is coupled to the second lamella part (102) in such a way that the first lamella part (101) is displaceable in the longitudinal direction (106) relative to the second lamella part (102).
3. Device according to claim 2,
   wherein at least the first lamella part (101) or the second lamella part (102) has a hollow profile, into which the other first lamella part (101) or the second lamella part (102) is insertable in the longitudinal direction (106).
4. Device according to claim 2,
   wherein the second lamella part (102) has two grooves (201), which extend in the longitudinal direction (106) and which are spaced apart from each other, wherein the first lamella part (101) has two edges, which extend in the longitudinal direction (106) and which are spaced apart from each other, and which are guidable in the grooves (201) of the second lamella part (102).
5. Device according to claim 4,
   wherein at least one of the grooves (201) is formed by an edge flanging of the second lamella part (102).
6. Device according to any one of the claims 2 to 5,
   wherein the first lamella part (101) has a first surface shape, in particular a first curved surface shape, which corresponds to a second surface shape, in particular a second curved surface shape, of the second lamella part (102).
7. Device according to any one of the claims 1 to 6,
   wherein the second guide strand (120) is fixed to the lamella (100) at the second coupling point (122),
   wherein the second guide strand (120) is movable in the guide direction (105) in such a way that the lamella (100) is movable along the guide direction (105).
8. Device according to any one of the claims 1 to 7, further having
   an installation device (103), which is adapted for attachment to the building area,
   wherein at least the first guide strand (110) and/or the second guide strand (120) is coupled to the installation device (103).
9. Device according to claim 8, further having
   a termination element (104),
   a drive chain (107), which is fixed with the end element (104) and is arranged in particular between the first guide strand (110) and the second guide strand (120),
   wherein the drive chain (107) is coupled retractably and extendably to the installation device (103),
   wherein the lamella (100) is arranged between the termination element (104) and the installation device (103),
   wherein the termination element (104) is movable by the drive chain (107) in the guide direction (105) in such a way that the termination element (104) contacts the lamella (100) during the movement in the guide direction (105) and displaces it [the lamella (100)] in the guide direction (105).
10. Device according to claim 9,
    wherein the lamella (100) has a guide opening (108), in particular an elongated hole, which extends in the longitudinal direction (106) of the lamella (100) as a guide opening (108), through which the drive chain (107) is guided.
11. Device according to claim 9 or 10, further having
    a plurality of lamellae (101), which are arranged between the termination element (104) and the installation device (103),
    wherein the termination element (104) is movable in the guide direction (105) by the drive chain (107) in such a way that the termination element (104) contacts at least one of the lamellae in the guide direction (105) during the movement and displaces at least one lamella (100) in the guide direction (105).
12. Device according to claims 1 to 11, further having
    a trimming weight (109), which is arranged on the lamella (100) such that the centre of gravity of the lamella (100) is adjustable between the first guide strand (110) and the second guide strand (120),
    wherein the trimming weight (109) is adjustable, in particular in the longitudinal direction (106),
    wherein the trimming weight (109) is adjustable in the longitudinal direction (106), in particular by an adjusting mechanism, as a function of a set length of the lamella (100).
13. Method for operating a device according to any one of the claims 1 to 12 for covering a building area, in particular a window of a building, the method having:
    guiding the lamella (100) in the longitudinal direction (106) along the at least first guide strand (110), such that a length of the lamella (100) between the first guide strand (110) and the second guide strand (120) adjusts during the guiding in the guiding direction (105).

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