DE10201121A1 - vertical blind - Google Patents

Abstract

A vertical blind (10) has a curtain (12) consisting of several vertical slats (14) lying next to each other, the angular position of which is adjustable. In order to be able to control the incidence of light in a more targeted manner, it is proposed that the vertical slats (14) each consist of at least one upper (20) and one lower slat part (24) and the slat parts (20, 24) of a slat (14) realistically in their angular position are adjustable to each other. This allows, for example, screen workstations to be protected from direct sunlight, while the sunlight in the upper part of the curtain can still be used to illuminate the room.

Description

The invention is concerned with a vertical blind a curtain of several lying next to each other Vertical slats, the angular position of which is adjustable.

Vertical blinds, which are usually arranged inside have been known for a long time and mostly with one rufflable curtain.

A disadvantage of such vertical blinds is that an adjustment of the angle of inclination the incidence of light always is changed over the entire window area so that it For example, screen workstations are not possible shield from direct sunlight and at the same time that Lighten the interior of the room with incoming sunlight, like this for example in blinds with horizontal slats or in Venetian blinds are possible.

To solve the problem has already been proposed before to provide a rail in the middle of the window surface, on which a second vertical blind with then of course regardless of the vertical blind above to arrange adjustable curtain. However, there is a central rail with continuous window surfaces very annoying and at Windows that should be opened when necessary are not practical.

Furthermore, it is already known to use the vertical slats Vertical blinds in the upper and lower area each to produce different translucent materials.

However, such a vertical blind can only be used under certain Circumstances lead to a satisfactory result because complete shading with transparent top Areas is not possible while at relatively strong shielding upper areas turn the problem of a poor room lighting occurs.

The object of the present invention is a To create vertical blinds that provide anti-glare offers improved room lighting.

According to the invention the object is achieved in that the Vertical slats each made up of at least one upper and one lower slat part are formed and the slat parts in their angular position are adjustable relative to each other.

Such a vertical blind, the slats of which are preferred two parts with an upper and a lower slat part are formed, allows in the upper area by a relatively open position of the upper slat parts the room well illuminate and on the other hand at the same time strong closed position of the lower slat parts for one safe glare protection, for example To provide screen workstations. On the other hand, the curtain can be used if necessary by rotating the slat parts relative to each other in a fully closed position can be adjusted if this is desired for glare protection or as privacy protection is.

The relative adjustability of the slat parts to each other can be done in different ways, one first relatively complex solution can consist in that the Slat parts of the slats independently in their angular position are adjustable from each other, for example by an im Mechanism arranged in a floor area Guide rail or the like. In such an embodiment the two slat parts over one if possible Connect the smooth-running swivel together.

In order to limit the mechanical effort, one is Embodiment particularly preferred in which the rotary movement of the respective lower slat part to the rotary movement of the upper slat part is coupled, the angle of rotation of the lower slat part an offset from the upper Slat part over at least a portion of the Has angular positions of the upper slat part.

In such a vertical blind, the bottom without Rail comes along, an adjustment, for example, in Art and made that from a complete closed blind position with parallel upper and lower Slat parts when opening the upper slat parts lower slat parts initially in their closed position remain. Above a certain limit angle, preferably 90 °, the lower one is then rotated Slat parts, if a stronger one in the lower curtain area Incidence of light is desired.

Such an adjustment characteristic can be realize different ways. A first preferred Solution can be that the top and the bottom Slat parts of a slat via rotatable Intermediate elements are connected, the parallel alignment of the Slat parts cause a moment on the lower slat part and with essentially vertical alignment of the lamella parts are relaxed to each other. In such an embodiment when opening the upper slat parts, the Intermediate elements relaxed, taking the lower one Slat parts after relaxing the intermediate elements from these can be taken, for example, via stops.

The torsional preload between the two slat parts can done by elastic torsion elements that work with leg springs or torsion bar spring elements, for example can. For example, in torsion bar spring elements Use of metallic materials or plastic conceivable, with cylindrical and conical shapes of Torsion element are conceivable. For torsion elements made of plastic prefer to find thermoplastic elastomers or with a such plastic coated metal wires use.

Instead of an elastically deformable intermediate or Torsion element is another preferred alternative Embodiment provided that the lower slat parts each via at least one ramp on the upper slat parts suspended and aligned parallel to the top Slat parts are raised by the ramp.

With this solution, which is particularly durable and for one very even preload in all lamellas that the lower slat parts initially in their closed Positioning torque by the weight of the lower slat parts produced by the inclination of the Curve ramps generated in connection with the given rotatability becomes.

One is particularly preferred in this embodiment Continuing education, in which between the upper and lower Slat parts each arranged two curve ramps offset by 180 ° are, which are preferably each at least 90 ° extend.

As already mentioned, a stop can be made after reaching a vertical position of the two slat parts to each other make sense to take the lower slat parts with you further twisting of the upper slat parts with more even Ensure alignment of all lower slat parts. If necessary, a stop can also be the relative Limit angle of rotation position in the other direction, d. H. if the upper and lower slat parts essentially parallel lie to each other.

The support of the lower slat parts, as a rule are freely suspended, preferably by that they are in the biased closed state on the lower Slat parts of adjacent slats are in contact. The support through the neighboring slat parts, considering the very low moments in most cases, for one mutual hold of the lower slat parts in the closed To provide position with overlapping flanks Avoid overturning from the closed position.

In a further preferred embodiment of the invention be provided that at least on one edge of the curtain continuous slat or a slat with torsionally rigid connected slat top and bottom part is provided on the the adjacent prestressed slat part in the closed Condition is sustainable. Since the end lamellae have no special Support only supported on one side is the additional one Support sensible to misalign the lower Avoid slat parts on the curtain edges. The solution with a continuous slat or a stiffened slat is particularly simple, but has the disadvantage that these slats either not at all in their angular position adjustable or only together with the lower part of the curtain can be made adjustable.

Another solution to support the lower slat parts in the prestressed closed position it can exist that on at least one edge of the curtain slat-independent elements are provided. These can, for example fixed on site or belonging to the curtain be formed, tension cords being optically special an inconspicuous solution is preferable. The tension cords can be firmly clamped to the structure, so that the movable Blinds only in the extended end position of the blind is supported, or there are tension cords conceivable with And then biased using a weight be designed to be extendable, for example, with the free curtain can.

As an alternative to prestressed joints joints also conceivable that have a non-linear characteristic have, e.g. B. toggle constructions with a dead center, through which the entrainment of the lower slat parts when Twisting of the upper slat parts is delayed, or elastic springs with bimetal strips.

The lamella parts can be about an articulation axis to each other be adjustable, the center or to an edge of the Slat parts is arranged shifted.

Below is based on the accompanying drawings Embodiments of the invention received. Show it:

FIG. 1.1 is a front view of a closed vertical blind;

Fig. 1.2 shows a cross section of the curtain of the vertical blind shown in Fig 1.1 along the line AA.

FIGS. 2.1 to 2.5 each show an end view of a lamella in different positions during an opening process;

Fig. 3 is a view of a vertical slat;

Fig. 4 is a detailed view of a resilient intermediate element between the two lamella parts;

Figure 5 is a schematic view of a further intermediate element between two lamellar means.

Fig. 6 is a detail view of a further intermediate element between the two lamella parts;

Fig. 7 detailed views of intermediate elements and 8 with elastic torsion elements;

Fig. 9 is a view of a closed curtain with continuous edge slats;

Fig. 10.1 a view of a closed vertical blind with fixed end stops;

Fig. 10.2 a cross-section of the vertical blind shown in Fig 10.1 along the line AA.

Figure 11 is a view of a closed vertical blind with cord stops of the end disc.

Fig. 12 is a view of a closed slatted blind with fixed tension cords as end stops.

In Fig. 1.1 a vertical blind 10 is shown, which has a curtain 12 of a plurality of mutually parallel slats 14 which are arranged suspended on an overhead rail 16. The slats 14 are adjustable in a manner known per se with the aid of a mechanism (not shown in more detail) in their angular position with the aid of an operating element 18 and the curtain 12 can be gathered to one side of the top rail 16 . The peculiarity of the vertical blind 10 shown is that the slats 14 are each formed in two parts with an upper slat part 20 and a lower slat part fastened thereon via an intermediate element 22 , the intermediate elements 22 causing the lower slat parts 24 to rotate relative to the upper slat parts allow. In the closed position shown in Fig. 1.1, the upper and lower slat parts are in the parallel closed position, ie the flanks of the individual slat parts 20 , 24 overlap with the flanks of the adjacent slat parts 20 , 24 (see also Fig. 1.2), so that incidence of light is largely prevented. An embodiment with a three-part curtain, ie middle slat parts, on the underside of which the lower slat parts are arranged via a further row of intermediate elements would also be conceivable; as a rule, however, two-part curtain designs will be preferred.

The relative rotatability of the lower slat parts 24 with respect to the upper slat parts 20 with the aid of the intermediate elements 22 makes it possible, for example, to let an opening process of the curtain shown in FIG. 2 take place. Fig. 2.1 14 shows by way of front view of a slat of the blind slats 12 the upper part 20 with the lower fin member 24 in an aligned closed position. If the upper lamellar parts 20 are now rotated with the help of the operating element 18 , the lower lamellar parts 24 initially remain in their closed starting position (see FIG. 2.2). This persistence in the closed starting position can be done either by a completely independent control of the rotary movement of the lower lamella parts 24 , for example by a mechanism in a floor rail, or by an intermediate element 22 biased in the starting position, which will be discussed in more detail later.

Once a position is reached in which the upper blade portions 20 are substantially perpendicular to the lower fin members 24 (see Fig. 2.3), then a driving or an independent rotation of the lower blade portions 24, wherein the at prestressed intermediate elements 22 in this position, Biasing of the intermediate elements 22 is used up. By turning the upper slat parts 20 further, the lower slat parts 24 are now increasingly opened (see FIG. 2.4) until the upper slat parts 20 return to a closed position after a turn of approximately 180 ° (see FIG. 2.5), in which the still existing vertical alignment of the lower slat parts 24 to the upper slat parts 20 of the lower curtain divides, is in its maximum open position. In the case of independently adjustable curtain parts, it would also be conceivable to open both curtain parts to a maximum, whereby instead of such an adjustment of the vertical blind 10 with a coupled adjustment of the two curtain parts, the curtain can be brought in if a maximum incidence of light is desired. The reversal of the in Fig. 2.1 to Fig. Movement sequence shown 2.5 of the upper blade portions 20 is effected by rotating back by means of the operating member 18, whereby the entrainment of the lower blade portions 24 in turn is carried into their in Fig. Closed position shown 2.3 and then optionally under prestress the intermediate elements 22 return to the fully closed position of the curtain 12 .

In Fig. 3, a single blade 14 having its upper fin member 20 and the lower fin member 24 is shown. The intermediate element 22 shown only schematically in this illustration can be designed differently depending on the type of blind control. In the case of separate inclination adjustments for the upper lamella parts 20 and the lower lamella parts 24 , the intermediate elements 22 consist of simple swivel joints which are intended to enable relative rotation between the upper and lower lamella parts with the least possible friction.

In order to be able to dispense with the complex additional control of the lower curtain parts, the previously mentioned pretensionable intermediate elements 22 are preferably used, which are pretensioned in the closed curtain position shown in FIG. 2.1. The prestressing of the intermediate elements keeps the lower lamella parts 24 in their closed position until the upper lamella parts 20 have passed their rectangular position with respect to the lower lamella parts 24 shown in FIG. 2.3. The moments applied by the intermediate elements 24 are supported by the contact of the lower lamella parts 24 on the respectively adjacent lower lamella parts (see FIG. 1.2).

In Fig. 4, a first example of an intermediate element 22 a is shown, which consists essentially of a simple swivel joint 30 , which ensures the rotatability of the two lamella parts 20 , 24 relative to one another, and a leg spring 32 , the upper leg end 34 of the upper lamella part 20 and whose lower leg end 36 is fixed to the lower slat part 24 . The leg spring 32 is designed in such a way that its pretension given in the closed position of the lower curtain part is zero after reaching the relative position of the upper lamella parts 20 shown in FIG. 2.3 and / or a stop (not shown) entrains after the pretension has been used up can ensure.

In Fig. 5, a further alternative for an intermediate element 22 is shown b that has no elastic member for building up the torque biasing in the closed rest position of the bottom drape. The lower slat part 24 is suspended via a bolt 40 in a rotary guide on the upper slat part 20 , which essentially consists of two ramps 42 arranged rotated by 180 °, each of which extends over at least 90 °. The weight of the lower lamellar part 24 is supported via a cross pin 44 on the inclination surfaces 46 of the ramps 42 , whereby the inclining of the ramps 42 in connection with their circular arrangement around the bolt 40 builds up the preloading moment that the lower lamellar parts 24 to Reaching the vertical relative position of the upper lamella parts 20 shown in Fig. 2.3 holds in its closed position. Stops 48 between the two ramps 42 distributed over the circumference ensure that the transverse pin 44 bears in the position according to FIG. 2.3, so that the lower plate parts are positively entrained as the position shown in FIG. 2.5 continues when the upper plate parts 20 are turned further. When the upper slat parts are turned back into the closed starting position according to FIG. 2.1, the lower slat parts rest with their flanks on the adjacent lower slat parts 24 and are slightly raised by the further closing movement of the upper slat parts 20 without further rotation by the ramps 42 , so that a build-up of the holding torque can take place in the lower plate parts 24 .

Another example of an elastically twistable intermediate element 22 c is shown in FIG. 6. The intermediate element 22 c here has a cylindrical or conical element 50 made of thermoplastic elastomer, which is clamped between two holding elements 52 , which are fixed to the upper plate part 20 or to the lower plate part 24 . An intermediate element 22 c consisting entirely of thermoplastic elastomer would also be conceivable, the ends of which are fixed directly to the lamella parts 20 and 24, respectively.

In this embodiment, the moments holding the lower lamella parts 24 in the closed position are built up by twisting the TPE element 50 . The twistable element can also consist of another suitable plastic or be designed as a metallic torsion bar or torsion bar, whereby mixed constructions are also conceivable, for example a metal wire sheathed with an elastomer. Still further exemplary embodiments for elastically resetting intermediate elements are shown in FIGS. 7 and 8. In these two embodiments, an intermediate element 22 d consists of two spring elements 60 , 62 (see FIG. 7), which are arranged in a crossed arrangement between the upper and lower lamella parts 20 , 24 . Alternatively, an intermediate element 22 e as shown in FIG. 8 can also consist of spring elements 70 , 72 which are constructed as bimetallic strips. In such an embodiment, a dead center is exceeded similar to a toggle lever construction above a certain torque, so that the tracking of the lower lamella parts takes place non-linearly after a certain relative limit rotation angle between the two lamella parts 20 , 24 has been exceeded. In the case of a dead center construction with bimetallic strips, toggle levers or structures having a comparable effect, embodiments of a vertical blind are also conceivable in which the two curtain parts in an open position have a relative angle of rotation which is clearly below 90 °.

The support of the lower lamellar parts on adjacent lamellar parts 24 may not be sufficient at higher holding torques for the lower lamellar parts 24 lying on the edges, so that they slightly twist and / or shift under the action of the prestressed intermediate elements with respect to the central lower lamellar parts 24 could be. If one wants to avoid this aesthetic reasons, it may be appropriate to provide additional support 14 for the lying at the edge of slat, one of which for example, four in Fig. 9 embodiments shown up to Fig. 12 to be described in detail.

In the embodiment of a vertical blind shown in FIG. 9, the two edge slats 74 are designed without intermediate elements, whereby they are either arranged rigidly or by means of suitable entrainment elements, such as for example. B. cords or the like can be rotated together with the lower slat parts 24 . As an alternative to slats 74 formed throughout, it would also be conceivable to replace the intermediate elements in the region of the outermost slats with rigid connections which are optically matched to the other intermediate elements. An advantage of the solution shown in FIG. 9 is that the continuous edge slats 74 can be retracted and extended together with the curtain, so that a secure contact can be made in the area of the free curtain end even when the curtain is not fully open and the slats are closed.

In Fig. 10.1 and Fig. 10.2, which shows a cross section of the vertical blind according to Fig. 10.1, stop angles 80 provided on site are provided for support, which absorb the prestressing moments in the closed rest position and thus for an exact parallel alignment of the lower slat parts 24 on the Ensure edges of the curtain. If necessary, a plurality of stop angles can also be provided over the height of the curtain, provided the lamella parts consist of a relatively resilient material, an arrangement of stop angles 80 in the region of the intermediate elements 22 being preferred in principle.

Another possibility of supporting the edge lamellae can be the use of tensioned cords, two different exemplary embodiments being shown in FIGS. 11 and 12. In the embodiment according to FIG. 11, tension cords 90 are provided at certain points, which are biased by freely hanging weights 92 . In the area of the lower slat parts 24, the tension cords 90 provide additional support for the outer lower slat parts in the pretensioned rest position. The embodiment according to FIG. 11 again offers the advantage that the tension cord 90 arranged on the free end of the curtain, with its own weight 92, is movable together with the curtain when retracting or extending, so that the free end of the curtain can be supported even when the curtain is not fully extended is.

A particularly stable and optically inconspicuous type of support with the aid of tension cords is shown in FIG. 12. In this embodiment, the tension cords 10 are firmly tensioned between the top rail 16 and abutments 102 on the floor. As a result, they are able to absorb particularly high forces without deformation and therefore to provide particularly precise support for the outer lower lamella parts 24 . It is not possible to move the outer tension cord in the area of the free end of the curtain, but closing the lower lamella parts 24 when the curtain is only partially open is generally not desired anyway.

Claims (20)

1. Vertical blind with a curtain ( 12 ) from a plurality of juxtaposed vertical slats ( 14 ) whose angular position is adjustable, characterized in that the vertical slats are each formed from at least one upper ( 20 ) and one lower ( 24 ) slat part and the slat parts ( 20 , 24 ) are adjustable relative to each other in their angular position. 2. Vertical blind according to claim 1, characterized in that the slat parts ( 20 , 24 ) of the slats are independently adjustable in their angular position. 3. Vertical blind according to claim 1, characterized in that the rotational movement of the respective lower slat part ( 24 ) is coupled to the rotational movement of the upper slat part ( 20 ), the angle of rotation of the lower slat part being offset with respect to the upper slat part ( 20 ) by at least one Has partial area of the angular position of the upper lamella part ( 20 ). 4. Vertical blind according to one of claims 1 to 3, characterized in that the upper and lower slat parts ( 20 , 24 ) of a slat are connected via a rotatable intermediate element ( 22 ; 22 a, b, c, d, e), the in the case of parallel alignment of the lamella parts ( 20 , 24 ), a moment is exerted on the lower lamella part and, when the lamella parts ( 20 , 24 ) are aligned essentially perpendicularly to one another. 5. Vertical blind according to claim 4, characterized in that the lower slat parts ( 24 ) in the loaded closed state of the intermediate elements ( 22 ; 22 a, b, c, d, e) on the lower slat parts ( 24 ) of adjacent slats ( 14 ) are supported are. 6. Vertical blind according to claim 4 or 5, characterized in that at least on one edge of the curtain a continuous slat ( 74 ) or a slat with torsionally rigid slat upper and lower part is provided, on which the adjacent prestressed slat lower part ( 24 ) in the closed state is supported. 7. Vertical blind according to one of claims 4 to 6, characterized in that at least on one edge of the curtain a slat-independent element ( 80 , 90 , 100 ) is provided on which the lower slat part ( 24 ) lying on the edge of the curtain in the closed state is supported. 8. Vertical blind according to claim 7, characterized in that the slat-independent elements are fixed on site ( 80 ; 100 ) or are associated with the curtain ( 90 ). 9. Vertical blind according to claim 7 or 8, characterized in that the slat-independent elements are designed as tension cords ( 90 ; 100 ). 10. Vertical blind according to claim 9, characterized in that at least the tension cord ( 90 ) on an extendable curtain is biased by means of a weight ( 92 ). 11. Vertical blind according to one of claims 4 to 10, characterized in that between the upper and lower slat parts ( 20 , 24 ) each have an elastic torsion element ( 22 a, c, d, e) is provided which with parallel alignment of the slat parts ( 20 , 24 ) is biased. 12. Vertical blind according to claim 11, characterized in that the torsion element ( 22 a) is a swivel joint ( 30 ) with a leg spring ( 32 ). 13. Vertical blind according to claim 11, characterized in that the torsion element is a torsion bar spring element ( 22 c) made of metal or plastic. 14. Vertical blind according to claim 13, characterized in that the torsion element ( 22 c) is cylindrical or conical. 15. Vertical blind according to one of claims 4 to 10, characterized in that the lower slat parts ( 14 ) each have at least one ramp ( 42 ) on the upper slat parts ( 20 ) and with parallel alignment to the upper slat parts ( 20 ) by the Ramps ( 42 ) are raised. 16. Vertical blind according to claim 15, characterized in that between the upper and lower slat parts ( 20 , 24 ) two curve ramps ( 42 ) are arranged offset by 180 °, each extending over at least 90 °. 17. Vertical blind according to one of the preceding claims, characterized in that the relative rotational angle end positions of the upper and lower slat parts ( 20 , 24 ) to one another by stops ( 48 ) in the position with parallel alignment of both slat parts ( 20 , 24 ) and / or in one Position with perpendicular alignment is limited. 18. Vertical blind according to one of the preceding claims, characterized in that the curtain ( 12 ) can be gathered. 19. Vertical blind according to one of the preceding claims, characterized in that the intermediate element ( 22 e) consists of a rotary joint with a non-linear characteristic, which has for example bimetallic strips or a toggle construction. 20. Vertical blind according to one of the preceding claims, characterized in that the lamella parts ( 20 , 24 ) are mutually adjustable about a hinge axis, which is arranged in the middle or to an edge of the lamella parts ( 20 , 24 ) displaced.