LAMELLENVORHANG

Description

(Technical field)

[0001] The present invention relates to a slatted blind for covering a building opening, such as a doorway. Such slatted blinds are known for preventing pollen and insects from entering through the doorway when the door is open. The curtain fabric used can also be designed to provide sun protection, particle protection, or privacy protection, with combinations possible. (Introduction)

[0002] Slatted blinds are suitable as protective devices that can be easily installed in front of a building opening, such as a balcony or patio door, to prevent or reduce the penetration of insects, particles or radiation, while at the same time allowing human and animal residents to easily pass through and allowing fresh air to enter.

[0003] Typical vertical blinds consist of several slats suspended in partially overlapping strips from a support rail. The support rail is attached to the outer frame of the balcony or patio door using double-sided adhesive tape, mounting adhesive, screws, clamps, or self-adhesive Velcro or loop fasteners, for example, so that the slats cover the building opening even when the door is open. The support rail is usually formed by a single profile section. Support rails with two telescopic profile sections are also known in the art. The advantage here is that their length can be adjusted to the width of the installation location by telescoping, without having to be cut to size.

[0004] In their simplest form, louvre blinds are rectangularly cut fabric panels. The fabrics used include insect, pollen, or sun protection nets made of polyester, polypropylene, blended fabrics, or PVC-coated fiberglass. Metal mesh made of stainless steel or aluminum is also used for special applications. A louvre blind can also be installed in front of a balcony or patio door as an additional thermally insulating barrier in colder outside temperatures by using louvres made of a heat-insulating or heat-reflecting material. This can reduce heat transfer from a heated interior, particularly through poorly insulating single-glazed balcony or patio doors. Suitable heat-reflecting materials, which can also be used in the form of louvres, include polyester fabrics that are metal-coated or metal-coated on one or both sides.For example, aluminum-coated polyester fabrics are commercially available. Single- or multi-layer composite materials can be used as thermal insulation materials, incorporating a layer with a high thermal transmittance. This layer can be made of foamed EVA material, for example.

[0005] The slats can be attached directly to the support rail, for example by using a clamping strip as the support rail, which clamps the upper section of the slats. Another option is to thicken the slat at the upper end or to connect it to a sliding element that is then mounted so that it can be moved linearly in a rail structure of the support rail. This makes it possible to move a slat within a limited area even after installation. A challenge arises when such linearly movable sliding elements are to be used in support rails with telescopic profile elements. The profile elements that can be telescoped into one another are similar in shape, but not identical. This means that at least the size of the rail structure also changes, which in turn means that the sliding element would have to adapt its shape if it was to be moved over the telescopic transition of the telescopic profile elements.

[0006] Since the slats are usually made of a material with a low surface weight, but at the same time offer a large surface area for wind or drafts, each slat is usually connected to a weighting strip at the bottom. Without this weighting strip, there is a risk that a gust of wind could blow the vertical blind open, allowing the very entities that the vertical blind was intended to prevent from entering to enter the living space. The width of the weighting strips corresponds approximately to the width of a slatted track, typically 18 cm - 40 cm. Sound-dampening buffers made of rubber-elastic material can be attached to the free ends of the weighting strips to dampen noises that would arise, for example, in windy conditions if the weighting strips were to bang unabsorbed against a closed balcony or patio door.

[0007] The most common installation location for a vertical blind is the upper horizontal rail of the outer frame of a balcony or patio door. In many cases, a roller shutter is integrated into the building structure above this frame. To ensure that the roller shutter can still be raised and lowered smoothly with a vertical blind installed, the installation depth of the vertical blind, and in particular the support rail of the vertical blind in a direction perpendicular to the frame, must be smaller than the shortest distance between the outer frame surface and the lowered roller shutter.

[0008] At the same time, the upper horizontal stile of the frame – i.e., above the closed door leaf, which rests on the inside of the frame – has only a limited vertical height available for mounting the support rail. The support rail should therefore have a height that is not too high to ensure compatibility with as many installation locations as possible. (State of the art)

[0009] Curtain arrangements are known.

[0010] EP 1 229 208 B1 describes a slatted blind for mounting on a window frame, wherein the slatted blind has several slat tracks that are slidably held in a profile section and that, when mounted, hang vertically from the profile section. The profile section has a profile shape in which several parallel "slots" are formed, extending along the longitudinal axis of the profile section. Each slat track is connected to a thickened portion at its upper track end. Each thickened portion, which is preferably designed as an extruded glider profile, is held in a single one of the several slots. The slots are inclined to the vertical in the mounted position of the slatted blind. A disadvantage of this slatted blind is that the installation depth of the profile section in the direction normal to the mounting surface is greater due to the inclined slots compared to a design with non-inclined slots.Since this type of slatted blind is usually installed outside balcony doors or patio doors, an excessively large installation depth can conflict with any existing external roller shutter, and the slatted blind cannot be installed without impairing the function of the external roller shutter. Another disadvantage is that the slatted blind can only be adjusted to the width of the balcony or patio door frame by shortening the profile section. Shortening requires a saw and - to ensure a straight cut - a miter box, which not every end user has. Another disadvantage is that because each slat or each glider profile connected to the slat is guided in a single slot, fan-like overlaps between the multiple slat tracks are not possible, also because the glider profile takes up an entire slat width in its slot.If the slats are to partially overlap, only alternating overlaps are possible. For example, with more than two slat tracks, a middle slat track would be placed either in front of the two flanking tracks or behind them. Another disadvantage is that the slats suspended at different heights in the support rail have different heights. Since the lower end of each slat must be at the same height, the slat tracks must be shortened to at least two different lengths.

[0011] EP 1 859 710 A1 describes a slatted blind for covering a door opening, comprising a support strip having an outer profile section and an inner profile section that can be telescopically inserted therein up to a certain insertion depth. The outer profile section is a hollow profile and has a height, a length, and a depth, as well as an inner contour and an outer contour. This slatted blind also has a plurality of slat tracks, each slat track having a slat track height and a slat track width, and each slat track is connected to a slider at its upper end. (Task)

[0012] The object of the present invention is to eliminate the problems described with reference to the prior art and, in particular, to provide a slatted blind whose slat tracks can overlap like a fan and can also be moved when installed. A further object of the invention is to provide a slatted blind that can be adjusted reversibly and without tools to different widths. A further object of the invention is to provide a slatted blind that has a support rail with a particularly shallow installation depth and a particularly low installation height. A further object of the invention is to disclose a curtain arrangement that can be adjusted reversibly and without tools to different widths, whose slats can be easily replaced and moved when installed and which has a support rail with a particularly low installation height and a particularly low installation depth. (Solution)

[0013] A first and general object of the invention, which is referred to here as embodiment 1 and with which the above-mentioned objects are achieved, is a slatted curtain (1) for covering a door opening surrounded by a frame, comprising a support strip (2) having an outer profile section (3) and an inner profile section (4) telescopically insertable therein up to an insertion depth (ET), wherein the outer profile section (3) is a hollow profile and has a height (AH), a length (AL), and a depth (AT), as well as an inner contour (13) and an outer contour (12), wherein the outer profile section (3) forms an upper main projection (5) on the outer contour (12) in the direction of its depth (AT), which extends along the length of the outer profile section (3), and this upper main projection (5) forms an upper guide channel (10) on the inner contour (13), wherein a lower main projection (6) extends parallel to the upper main projection (5) with a height offset (HV) below the upper main projection (5), which forms a lower guide channel (11) on the inner contour (13), wherein the inner profile section (4) has an upper auxiliary projection (7),which extends along the length of the inner profile section (4) and the upper auxiliary projection (7) engages in the upper guide channel (10) of the outer profile section (3), wherein the inner profile section (4) additionally has a lower auxiliary projection (8) which runs offset with the height offset (HV) below and parallel to the upper auxiliary projection (7), and the lower auxiliary projection (8) engages in the lower guide channel (11) of the outer profile section (3); a first adapter profile section (14) which is placed on the protruding part of the upper auxiliary projection (7) of the inner profile section (4) and limits the insertion depth (ET), wherein the placed first adapter profile section (14) forms an upper guide rail (24) with the upper main projection (5) over the entire length of the support strip (2),wherein the outer contour of the upper guide rail (24) remains substantially the same over the entire length of the support strip (2); a second adapter profile section (14) which is placed on the protruding part of the lower auxiliary projection (8) of the inner profile section (4), wherein the placed second adapter profile section (14) forms, with the lower main projection (6), a lower guide rail (25) over the entire length of the support strip (2), which extends over the entire length of the support strip (2), wherein the outer contour of the lower guide rail (25) remains substantially the same over the entire length of the support strip (2); and a plurality of slatted tracks (15), wherein each slatted track (15) has a slatted track height (LH) and a slatted track width (LB), and each slatted track (15) is connected at its upper end to a slider (16), wherein each slider (16) has a step plate (17),to which an upper clip element (18) and a lower clip element (19) are formed, wherein the lower clip element (19) is arranged laterally offset relative to the upper clip element (18) in the direction of the slat track width (LB) and in height by the height offset (HV), and wherein the step plate (17) has a recess below the upper clip element (18) and above the lower clip element (19), and wherein the upper clip element (18) engages in the upper guide rail (24) and the lower clip element (19) engages in the lower guide rail (25).

[0014] Also revealed are an embodiment 2 according to embodiment 1, wherein the inner profile section (4) above the two auxiliary projections (7, 8) and the outer profile section (3) above the main projections (5, 6) each form a fastening surface (22, 23), and wherein each fastening surface is parallel to the plane of the frame in the assembled state; an embodiment 3 according to embodiment 2, wherein an end cap (21) is provided at the free end of the inner profile section (4) and at the free end of the outer profile section (3), each of which can be connected in a plug-in manner to the free end of the respective profile section (3, 4); an embodiment 4 according to embodiment 3, wherein each end cap (21) has a contact surface in the assembled state, which projects beyond the respective fastening surface in a direction oriented towards the frame;an embodiment 5 according to one of the preceding embodiments, wherein N outer profile sections (3) can be combined alternately with (N+1) inner profile sections (4) to form an extended support strip (2), and N is a natural positive number; an embodiment 6 according to one of the preceding embodiments, wherein in the assembled state, the width (LB) of a slat track (15) corresponds to the width of the slider (16) connected thereto, and the slat tracks (15) coupled via the slider in the guide rails can overlap in a fan-like manner without the sliders (16) connected to the slat tracks (15) overlapping;an embodiment 7 according to one of the preceding embodiments, wherein the slatted web (15) is cut from a material web, wherein the material web is made from an insect protection gauze, a pollen protection net, a thermally insulating material, or a thermally reflective material, in particular from an insect protection gauze with a mesh size of less than 1.5 mm; an embodiment 8 according to one of the preceding embodiments, wherein the inner profile section (4) and the outer profile section (3) are produced by extrusion of an aluminum alloy. ;

[0015] Thus, the slatted blind according to the invention has a telescopic support rail with an inner profile section and an outer profile section. This allows the width of the support rail and thus the width of the slatted blind to be variably adjusted to different frame widths.

[0016] Instead of a single outer profile section and a single inner profile section that can be telescopically inserted or extended into the outer profile section, multiple inner profile sections and multiple outer profile sections can also be combined, as long as the support strip is composed of alternating inner and outer profile sections. It is also possible to combine two inner profile sections with one outer profile section, or vice versa.

[0017] The outer profile strip forms two main projections on its outer contour, which are arranged one below the other and are curved outwards in particular, and which extend along the outer profile section. The cross-section of the inner profile section has an outer contour that fits completely into the inner contour of the cross-section of the outer profile section. In addition, the inner profile section forms two auxiliary projections arranged one below the other, which engage on the inner contour of the hollow outer profile section in the structures of the geometry that appear externally as main projections, which are curved in particular inwards. The outer main projections of the outer profile section, which are curved outwards in particular, form guide channels when viewed from the interior of the outer profile section, into which the auxiliary projections of the inner profile section can move linearly, thus linearly guiding the part of the inner profile section located in the outer profile section.

[0018] A characteristic feature of the invention is that, despite the use of telescopic profile sections, the same receiving geometry for coupling the slat tracks is provided over the entire length of the support strip, which is composed of the inner and outer profile sections. This is achieved by providing adapter profile sections along the length of the part of the inner profile section that protrudes from the outer profile section, which adapter profile sections are placed onto the auxiliary projections of the inner profile section, in particular by plugging or clipping. The outer contour of the adapter profile sections corresponds to the outer contour of the main projections. Thus, two guide rails are formed over the entire length of the support strip, i.e. the length between the two free ends of the assembled outer and inner profile sections, the outer contour of which guide rails does not change over the length of the support strip.

[0019] To connect the slatted tracks to the support rail, gliders are provided that are connected to the slatted track. The gliders are preferably made of a thermoplastic material that can be bonded to the slatted track material—or the coating of the slatted track material—for example, by ultrasonic welding, thermal welding, gluing, riveting, or screwing. In particular, the glider can be made of PVC, which can be thermally welded particularly easily to a PVC-coated slatted material. The width of the gliders corresponds to the width of the slatted track.

[0020] Each glider has a stepped plate from which clip elements rise in a direction normal to one of its two main surfaces. The clip elements are located at the lateral ends of the stepped plate and are offset in height. The offset corresponds to the height offset of the guide channels from one another. Each clip element is slidably connected to a different one of the two guide channels, allowing the glider and thus the slatted track to be moved along the support strip. Due to the stepped shape of the stepped plate and the offset clip elements, when several slatted tracks are installed, they can partially overlap without the gliders colliding in their guide tracks, even though all gliders are linearly guided in the same two guide tracks.This advantageously allows the degree of fan-like overlap of the slat tracks to be precisely adjusted, even after the support strip has been mounted to a surface. If the support strip is designed to be removable, as described below, a slat track can also be flexibly removed or replaced. Upon request, the overlaps of the slat tracks can be chosen evenly or unevenly. It is also possible to leave a gap between two slat tracks, if desired.

[0021] The louvre panels are preferably connected to a weighting strip at their lower end. This weighting strip helps ensure that the louvre panels, which can be made of a relatively lightweight material and thus moveable by wind, hang straight, wrinkle-free, and stable in front of a building opening, reliably preventing the entry of unwanted insects, particles, or rays.

[0022] The support rail can be attached to the frame in a removable manner using self-adhesive hook-and-loop fasteners and loop fastener strips. The inner and outer profile sections preferably have attachment surfaces above the two auxiliary or main projections for the self-adhesive loop fastener strips. In combination with hook-and-loop fastener strips glued to the upper rail of the frame, the support rail can be attached using hook-and-loop fasteners. If the support rail and thus the vertical blind are to be removed, the hook-and-loop fastener connection is removed, leaving the self-adhesive hook-and-loop fastener strips on their surfaces. (Examples / Figures) (Short description of the characters)

[0023] Fig. 1 shows a front view of a slatted blind (1) according to the invention, which is mounted in front of a door opening. Fig. 2 shows a perspective view of the support bar (2) of the slatted blind (1) according to the invention. Fig. 3 shows in a perspective view a slat track (15) with connected glider (16) as part of the slatted curtain (1) according to the invention. Fig. 4 shows in cross section components of the slatted curtain according to the invention. Fig. 5 shows in cross section further components of the slatted curtain according to the invention. Fig. 6 shows in a perspective view an upper section of the slatted blind according to the invention with two installed slat tracks and two not yet installed slat tracks. Fig. 7 shows in a perspective view an upper section of the slatted blind according to the invention with an installed slat track and a not yet installed slat track. (Detailed description of the embodiment)

[0024] An embodiment of the present invention will now be described in detail with reference to the accompanying figures.

[0025] Fig. 1 shows an embodiment of the slatted blind (1) according to the invention from the visible side, i.e. the side that is visible outside a building opening after installation. The slatted blind has a horizontally running support bar (2) at the top, which comprises an outer profile section (3) and an inner profile section (4) that can be telescoped into it. By retracting or extending the inner profile section (4), the width of the support bar (2) can be adjusted to the door opening that the slatted blind (1) is intended to protect. Four fan-like, overlapping slat tracks (15) hang from the support bar (2) and - as explained in more detail later - are coupled to the support bar (2). The slat tracks (15) are each connected at their lower end to a weighting bar (20). Noise-damping buffers (9) made of a thermoplastic elastomer can be arranged at the free ends of the weighting bar.The slatted panels (15) have a width (LB) of 27 cm and a height (LB) of 210 cm. Instead of four slatted panels (15), three or five could be attached to the support rail (2). The slatted panels are made of an insect screen made of PVC-coated fiberglass fabric. The meshes of the fiberglass fabric are square and have a mesh size of 1.2 mm. The surface weight of the insect screen is 120 grams per square meter.

[0026] Fig. 2 shows a perspective view of the mounting side of the support strip (2). It comprises the outer profile section (3) and the inner profile section (4) inserted into it up to an insertion depth (ET). The outer profile section (3) has an upper main projection (5) on its outer contour (12), which extends parallel to the longitudinal profile axis over the entire length of the outer profile section (3), as well as a lower main projection (6) arranged below it with a height offset (HV), which runs parallel to the upper main projection (5). The inner profile section (4) has an upper auxiliary projection (7) on its outer contour, which extends parallel to the longitudinal profile axis over the entire length of the inner profile section (4), as well as a lower auxiliary projection (8) arranged below it with a height offset (HV).The auxiliary projections are T-shaped in cross-section and, when the inner profile section (4) is inserted into the outer profile section (3), engage in the internal geometry of the main projections, which are then referred to as guide channels (10, 11). Above the auxiliary projections (7, 8), the inner profile section (4) has an outer, flat fastening surface (23). Similarly, the outer profile section (3) has a flat fastening surface (22) above the main projections (5, 6). The fastening surfaces (22, 23) serve to fasten the support strip (2) to a surface such as that provided by a window frame above the building opening or door opening. Fastening can be achieved, for example, using self-adhesive Velcro and loop fastener tapes, with the self-adhesive loop fastener tapes being adhered to the fastening surfaces (22, 23) of the inner and outer profile sections, and the self-adhesive Velcro tapes being adhered to the upper stile of the window frame.Alternatively, fastening can be achieved using a paste-like assembly adhesive, which is applied to the frame in the areas where the fastening surfaces (22, 23) rest. The support strip (2) can also be attached using several strips of double-sided adhesive tape, the first adhesive side of which is adhered to the fastening surfaces (22, 23), and the opposite adhesive side is adhered to the frame. The inner profile section (4) and the outer profile section (3) are manufactured by extrusion of an aluminum alloy.

[0027] Fig. 3 shows a perspective view of the assembly side of a slatted track (15) that is connected to a slider (16) by thermal welding. The slider (16) has a step plate (17) that is geometrically composed of two imaginary rectangular plates arranged in a step shape, which are integrally and partially connected to a lower and upper narrow edge, respectively. The main surfaces of the two step-shaped plates, which are conceived here as an alternative, are not connected. Clip elements (18, 19) extend from one of the two main surfaces of the step plate (17) and grip the guide rails described below like fingers. The clip elements are arranged at the outer ends of the step plate and are offset in height by the height offset (HV) and offset in width by the lateral offset (SV).Thus, an upper clip element (18) is located at one outer end of the step plate at the top, and another lower clip element (19) is located at the opposite end of the step plate at the bottom. The clip elements are spring-loaded and can each be clipped onto a guide rail, as explained later.

[0028] Fig. 4 shows the cross-section of the outer profile section (3) and the cross-section of the slat track (15) with the connected slider (16). The upper and lower main projections (5, 6) appear approximately omega-shaped in cross-section on the outer contour (12) of the hollow outer profile section (3). Inside, the main projections (5, 6) each form guide channels (11, 10), into which auxiliary projections (7, 8) of the inner profile section (4) engage, as explained below.

[0029] Fig. 5 shows the cross-section of the inner profile section (4), the cross-section of the adapter profile sections (14), and the cross-section of the slat track (15) with connected slider (16). The inner profile section (4) forms two auxiliary projections (7, 8) arranged with a height offset (HV) below one another, which appear T-shaped in cross-section. These T-shaped auxiliary projections (7, 8) engage in the Fig. 4 visible guide channels (10, 11) of the outer profile section (3). The adapter profile sections (14) are placed onto the auxiliary projections (7, 8) along the part of the inner profile section (4) that protrudes from the outer profile section (3). The adapter profile sections (14) have an omega-shaped cross-section and are made of a spring-elastic material so that they can be clipped onto the T-shaped auxiliary projections (7, 8). When clipped on, the cross-section of the adapter profile sections expands slightly and then relaxes as soon as the auxiliary projections (7, 8), which have a T-shaped cross-section, are encompassed. The omega-shaped cross-section of the adapter profile sections (14) is largely similar on the outside to the outer cross-section of the main projections (5, 6).Thus, when the inner and outer profile sections are pushed into one another, the main projections (5, 6) of the outer profile section (3) with the adapter strips (14) placed on the auxiliary projections (7, 8) of the inner profile section (4) form guide rails (24, 25) over the entire length of the support strip (2), whereby the clip elements (18, 19) relevant outer geometry of the in . Fig. 7 shown guide rails (24, 25) essentially do not change over the entire length of the support bar (2).

[0030] Fig. 6 shows a perspective overview of the interaction of the components, with end caps (21) provided on the outer ends of the support strip (2). The end caps (21) can project slightly beyond the fastening surfaces (22, 23) on the profile sections towards the installation side. This is advantageous when fastening with a self-adhesive hook and loop fastener strip if the extent of the projection is adapted to the thickness that the hooked hook and loop fastener strip takes up with the loop fastener strip. The end caps can therefore better support the support strip on the frame, because a hook and loop fastener connection generally allows a certain amount of relative movement between the hook and loop fastener strip and the loop fastener strip, which would lead to relative movement of the support strip (2) at the fastening location, which is generally not desired.In addition, the end cap (21) protrudes slightly beyond the fastening surfaces (22, 23) of the support strip (2) and creates a clearance that is required to be able to move the gliders (16) of the slats even after the support strip (2) has been mounted on a frame.

[0031] Fig. 7shows the support strip (2) with the adapter profile sections (14) placed on the auxiliary projections of the inner profile section (4), which, together with the main projections (5, 6) of the outer profile section (3), form an upper guide rail (24) and a lower guide rail (25) over the entire length of the support strip (2). The figure on the right shows an installed slat track (15). The clip elements (18, 19) of the slider (16) connected to the slat track (15) engage around the guide rails (24, 25), which in this area are formed by the main projections (5, 6) of the outer profile section (3). The slat track can be pushed to the left along the guide rails (24, 25) with its slider, wherein the guide rails (24, 25) in the region of the protruding inner profile section (4) are formed by the adapter profile sections (14) which have been placed on the auxiliary projections (7, 8) of the inner profile section (4).The stepped shape of the gliders (16) allows multiple slat tracks (15) to overlap in a fan-like manner without the gliders (16) overlapping. Since all slat tracks (15) are connected to exactly two guide rails (24, 25) via the gliders (16), the overall height of the support strip (2) can be advantageously reduced. (List of reference symbols)

[0032] 1 Vertical blind 2 Support rail 3 Outer profile section 4 Inner profile section 5 Upper main projection (outer profile section) 6 Lower main projection (outer profile section) 7 Upper auxiliary projection (inner profile section) 8 Lower auxiliary projection (inner profile section) 9 Buffer 10 Upper guide channel (outer profile section) 11 Lower guide channel (outer profile section) 12 Outer contour of the outer profile section 13 Inner contour of the outer profile section 14 Adapter profile section 15 Slat track 16 Glider 17 Step plate (glider) 18 Upper clip element (glider) 19 Lower clip element (glider) 20 Weighting strip 21 End cap 22 Fastening surface of the outer profile section 23 Fastening surface of the inner profile section 24 Upper guide rail 25 Lower guide rail AHOuter profile section height ALOuter profile section length ATOuter profile section depth ETInsertion depth HVHeight offset SVLateral offset LBLatch track width LHLlatch track height

Claims

1. A slat curtain (1) for covering a door opening which is surrounded by a door frame, comprising - a support bar (2), which has an outer profile section (3) and an inner profile section (4) which can be inserted telescopically into it up to an insertion depth (ET), wherein the outer profile section (3) is a hollow profile and has a height (AH), a length (AL) and a depth (AT), as well as an inner contour (13) and an outer contour (12), wherein, in the direction of its depth (AT), the outer profile section (3) forms an upper main protrusion (5) on the outer contour (12) which extends along the length of the outer profile section (3), and this upper main protrusion (5) forms an upper guide channel (10) on the inner contour (13), wherein a lower main protrusion (6) which forms a lower guide channel (11) on the inner contour (13) extends below the upper main protrusion (5) and parallel thereto with an offset in height (HV), wherein the inner profile section (4) has an upper auxiliary protrusion (7) which extends along the length of the inner profile section (4) and the upper auxiliary protrusion (7) engages in the upper guide channel (10) of the outer profile section (3), wherein the inner profile section (4) additionally has a lower auxiliary protrusion (8) which extends below and parallel to the upper auxiliary protrusion (7), offset by the height offset (HV), and the lower auxiliary protrusion (8) engages in the lower guide channel (11) of the outer profile section (3); - a first adapter profile section (14), which is fitted onto the protruding portion of the upper auxiliary protrusion (7) of the inner profile section (4) and borders the insertion depth (ET), whereby the fitted first adapter profile section (14) with the upper main protrusion (5) forms an upper guide track (24) over the entire length of the support bar (2), whereby the outer contour of the upper guide track (24) remains substantially identical over the entire length of the support bar (2); - a second adapter profile section (14), which is fitted onto the protruding portion of the lower auxiliary protrusion (8) of the inner profile section (4), whereby, over the entire length of the support bar (2), the fitted second adapter profile section (14) with the lower main protrusion (6) forms a lower guide track (25) which extends over the entire length of the support bar (2), whereby the outer contour of the lower guide track (25) remains substantially identical over the entire length of the support bar (2); and - a plurality of lengths of slat material (15), wherein each length of slat material (15) has a slat material height (LH) and a slat material width (LB) and the respective upper end of each length of slat material (15) is connected to a slider (16), wherein each slider (16) has a stepped plate (17) on which an upper clip element (18) and a lower clip element (19) is formed, wherein, relative to the upper clip element (18), the lower clip element (19) is laterally offset in the direction of the slat material width (LB) and offset in height by the height offset (HV), and wherein the stepped plate (17) has a respective recess below the upper clip element (18) and above the lower clip element (19), and wherein the upper clip element (18) engages in the upper guide track (24) and the lower clip element (19) engages in the lower guide track (25).

2. The slat curtain (1) as claimed in claim 1, wherein the inner profile section (4) above the two auxiliary protrusions (7, 8) and the outer profile section (3) above the main protrusions (5, 6) respectively form a fixing surface (22, 23), and wherein, in the installed state, each fixing surface is parallel to the plane of the door frame.

3. The slat curtain (1) as claimed in claim 2, wherein a respective end cap (21) is provided at the free end of the inner profile section (4) and at the free end of the outer profile section (3), which end cap can respectively be connected to the free end of the respective profile section (3, 4) by insertion.

4. The slat curtain (1) as claimed in claim 3, wherein in the installed state, each end cap (21) has a seating surface which protrudes beyond the respective fixing surface in a direction orientated towards the door frame.

5. The slat curtain (1) as claimed in one of the preceding claims, wherein N outer profile sections (3) can be combined with N+1 inner profile sections (4) in alternation to form an extended support bar (2), and N is a positive natural number.

6. The slat curtain (1) as claimed in one of the preceding claims, wherein in the installed state, the width (LB) of a length of slat material (15) corresponds to the width of the slider (16) connected thereto and the lengths of slat material (15) coupled into the guide tracks by the sliders can overlap in a fan-like manner without the respective sliders (16) connected to the lengths of slat material (15) overlapping.

7. The slat curtain (1) as claimed in one of the preceding claims, wherein the length of slat material (15) is cut from a length of material, wherein the length of material is produced from an insect screen mesh, a pollen screen net, a heat-insulating material or a heat-reflecting material, in particular from an insect screen gauze with a mesh size of less than 1.5 mm.

8. The slat curtain (1) as claimed in one of the preceding claims, wherein the inner profile section (4) and the outer profile section (3) are produced by extrusion of an aluminium alloy.