EP3748117A2 - Slat blind and cable lift for a slat blind - Google Patents

Abstract

The invention relates to a cable elevator (22) for winding or unwinding a cable (20) coupled to the lower rail (18) of a blind (10). Said cable elevator (22) comprises a rotatable roller (44) with an external thread. The roller (44) serves to receive the rope (20) in a single layer on its circumference along a longitudinal direction of the roller (44). Furthermore, the cable elevator (22) comprises a housing (46) for receiving the roller (44) with an opening (48) for the passage of the cable (20) and an internal thread section (50) that can be statically fixed to the housing (46) or is formed in one piece with it ), which can be brought into engagement with the external thread of the roller.

Description

The present invention relates to a cable elevator according to claim 1 and a slat blind according to claim 2.

Especially with very wide venetian blinds, it can happen that their (long) lower rail sags or is bent in the middle due to their own weight.

The object of the present invention is to provide a cable drive for a slatted blind, which minimizes or even completely prevents sagging or bending of the lower rail of the slatted blind.

This object is achieved by a cable elevator according to claim 1.

The cable elevator according to the invention comprises a rotatable roller for the single-layer reception of the cable on its circumference along a longitudinal direction of the roller. The cable elevator further comprises a housing for receiving the roller with an opening for passing the cable through and an internally threaded section which can be statically fixed with the housing or is formed in one piece with it. The roller in turn comprises an external thread which can be brought into engagement with the internal thread section.

The object is also achieved by a slat blind according to claim 2.

The slat blind according to the invention comprises laterally arranged guide rails, a blind curtain arranged between the guide rails with a plurality of slats, a lower rail closing the blind curtain and at least one elevator device. The at least one elevator device in turn comprises a cable elevator according to the invention, as described above.

One aspect of the invention relates to the use of a cable elevator according to the invention for winding or unwinding a cable coupled to the lower rail of a slatted blind, in particular for single-layer stringing of the cable on the circumference of the roller or for single-layer unwinding of the cable from the circumference of the roller.

Another aspect of the invention relates to a roller with an external thread for use in a cable elevator according to the invention. The roller comprises inside a spiral winding section with a spiral increasing radius.

Yet another aspect of the invention relates to the use of a roller according to the invention for winding or unwinding a cable coupled to the lower rail of a slatted blind, in particular for single-layer stringing of the cable on the circumference of the roller or for single-layer unwinding of the cable from the circumference of the roller.

An additional aspect of the invention relates to a method for winding or unwinding one with the Rope coupled to the lower rail of a slat blind by means of a rope elevator according to the invention. The method includes, in addition to rotating the roller, moving the roller in a longitudinal direction by said rotating the roller and a single-layer lined up of the rope on the circumference of the roller with the rotation of the roller or a single-layer unwinding of the rope from the circumference of the roller with the Rotating the platen.

Slat blinds generally serve to protect against sun rays and the weather. The slat blinds can in particular be attached to the outside of a building in front of windows and / or doors. Slat blinds are known which contain a blind curtain with a plurality of slats and a lower rail that closes off the blind curtain at the bottom. The slats and the closing bottom rail can be guided laterally between the respective guide rails. The slats can be joined together with the closing bottom rail by flexible connecting elements, e.g. Cords to be connected together. In addition, the individual slats can be swiveled into different inclinations in order to regulate the incidence of light.

When the blinds are lowered to the lowest possible position and the individual slats, together with the lower rail, are swiveled out of the horizontal position as much as possible, the incidence of light can be largely shielded or a high degree of darkening can be achieved.

One problem is that a gap is created between the side ends of the respective slats and the respectively assigned guide rails through which light can enter the building. Another disadvantage is that, additionally or alternatively, light enters the interior of the building via respective through-holes in the slats, through which elevator belts are guided, which run from the upper receptacle to the lower rail. Said disadvantageous incidence of light via the gaps and / or the perforations in the slats has the disadvantage that complete darkening is not achieved.

There are known roller shutters which comprise a curtain made of visor elements that are flexibly connected to one another, the curtain being rolled up or unrolled for opening and closing. The entire curtain is guided vertically laterally within guide rails. When a roller shutter is not completely closed, the panel elements that are adjacent to one another in the vertical direction are held at a distance from one another by corresponding flexible straps. In this way, incidence of light through gaps between the respectively adjacent panel elements can be ensured. Only when the roller shutter is completely closed do all the panel elements lie essentially flush with one another, so that in this state one can speak of essentially complete darkening. A disadvantage of this solution is that the incidence of light can only be adjusted within a narrow range. Further disadvantageously, the user can only look outside to a very limited extent through the gaps in the adjacent panel elements. So that the user can have a complete look outside, the curtain of the roller shutter would have to be rolled up every time, which is laborious and time-consuming and leads to high wear. A further disadvantage is a so-called roller shutter box, within which the curtain is rolled up, very large in size and takes up a lot of space. In addition, the roller shutter box takes up a large area of this in the upper section of a window or a door, which disadvantageously reduces the amount of light entering the building.

The above-mentioned disadvantages are overcome by a slatted blind comprising: laterally arranged guide rails, a blind curtain arranged between the guide rails with a plurality of slats, a lower rail closing the blind curtain, and at least one elevator device. The slats each have a closing panel surface and an upper edge angled for this purpose in the upper section, the angled upper edge being provided with laterally protruding guide pins over which the slats are pivotably guided in the guide rails. The closing panel surface protrudes laterally at least in sections over the angled upper edge in such a way that protruding sections of the panel surface can be brought into contact with the guide rails and are at least partially overlapped with the guide rails.

The slat blind allows almost complete darkening, as the individual slats, when closed, are brought into contact with the two guide rails laterally with their panel surfaces. In other words, the end sides of the lamellas overlap with the guide rails so that, compared to the prior art, in which the lower rail is mounted in the middle, or the fulcrum of the lamellas is on their faceplate, there is no gap through which direct light is created can invade the interior of the building. This advantage is achieved in that the guide pins are each attached to a section of the lamellas, here defined as the upper edge, which is angled with respect to the faceplate. As long as no further forces or torques are applied to the slats, the individual slats swing down by gravity and are supported by the outer surfaces of the guide rails, or the faceplate surfaces of the individual slats come into contact with their rear side. The upper edge can be angled at an angle in a range from 50 ° to 90 °, preferably substantially 70 °, with respect to the screen surface. During the lifting and lowering of the slats, the lower rail is kept in a horizontal position in order to keep the slat stack in a horizontal position. As soon as the lower rail is in the lowest position, the lower rail can also be pivoted. However, this is not the case mandatory. The lower rail can also not be pivoted.

When closed, the slat blind allows a degree of darkening that can be similar to that of a roller shutter - but with a very significant advantage compared to a roller shutter, namely that the slats can simply be tilted at any time so that light can enter the building and the user is able to do so, almost To be able to look outside undisturbed. The light / brightness regulation of the venetian blind is much better than roller shutters. This is the first time that an extremely reliable slat blind has been created, which offers almost complete darkening with simple means and also very comprehensive light / brightness regulation.

The slatted blind also advantageously allows complete privacy protection from the outside into the interior of the building. The slat blind also has a break-in-resistant appearance because when closed it looks like a roller shutter from the outside. In addition, there are no beads or bending edges in the visible area of the curtain to disturb the aesthetics.

In one embodiment, vertically adjoining lamellae are overlapped at least in sections. In this case, lower edge sections of the diaphragm surfaces each rest on the upper edge portions of the diaphragm surface of lamellas arranged below. When the blinds are completely lowered, the overlap of the adjacent slats must be minimal, but still sufficient to prevent light from entering.

The elevator device preferably contains at least one belt drive or a belt elevator. The belt drive is arranged in the area of the guide rails. Examples of a belt drive are a toothed belt drive, a perforated belt drive, etc. As an alternative to the belt drive, the belt elevator can be provided, which raises or lowers the lower rail via elevator belts. The tape elevator can be arranged in any section between the two guide rails.

The elevator device preferably contains at least one electrically and / or manually drivable drive device. This means that the slats of the blinds can be moved up and down by motor power or by hand, and their inclination can optionally be varied. Exemplary actuators for manually driving the elevator device can include a crank or an elevator cord. An electrically drivable drive device can have an electric motor which raises or lowers the blind curtain by motor power. The inclination of the slats can also be changed by an electric drive.

Preferably, in an embodiment in which the elevator device contains the at least one belt drive, the belt drive contains at least one toothed wheel, which is coupled to the drive device, and at least one belt, wherein the belt is coupled at the lower end to the lower rail and at least partially engages with teeth of the gear at the other end. The belt can be a perforated belt, a toothed belt, etc. The belt drive is characterized by the fact that it can absorb high forces.

The belts are preferably each guided within the guide rails. The straps can be made of an elastic plastic material. In one example, an elastic strap, e.g. the perforated belt, guided 180 ° around the gear and thus comes into reliable contact with it. In another example, the belt can be made from an abrasion-resistant plastic material.

Preferably, in an embodiment in which the elevator device contains the at least one tape elevator, the tape elevator contains an elevator tape which is coupled to the lower rail at one end and which can be wound up or unwound at least in sections at the other end by the at least one tape elevator. Thus, the lower rail is reliably lifted and lowered by the belt lifts and the respectively assigned lift belts.

The slatted blind preferably also contains at least one cable elevator for winding or unwinding a cable coupled to the lower rail. These Embodiment is used in a slatted blind in which the elevator device contains the at least one belt drive. The lower rail is supported against bending by means of the cable lift. In one example, the cable drive can be arranged centrally between the guide rails.

The at least one cable drive preferably contains a rotatable roller which is coupled to the drive device, the cable being coupled to the lower rail at one end and being able to be wound at least in sections on the circumference of the roller at the other end. The roller can be rotated by an applied torque from an electric motor coupled to it.

The angled upper edges of the slats are preferably each provided with at least one through-hole, and the rope or the elevator belt is guided through these through-holes in the course between the cable drive and the lower rail or between the belt elevator and the lower rail. A very significant advantage of this embodiment is that the elevator tape or the rope in the closed state of the blinds, with the slats inclined into the darkening position, runs completely behind the face of the blinds when viewed from the outside. The elevator tape or the rope is therefore not exposed to any UV radiation in the closed state (ie in the shaded state) of the blind curtain. As a result, the elevator tape or the rope is and are effectively protected against UV radiation Aging processes of the elevator tape or of the rope are advantageously greatly delayed, whereby the wear thereof is greatly reduced. This significantly extends the service life of the elevator tape or rope. Another advantage is that, in the completely closed state of the blind curtain, the through-holes for passing the elevator tape or the rope are not exposed to the outside. As a result, no light can enter the interior of the building through these perforations. Likewise, no unauthorized look inside the building can be thrown from the outside. Thus, a slat blind is created which enables complete darkening and complete privacy protection.

The cable drive is preferably arranged in a section of the slatted blind which is offset from the guide rails. In this way, in the case of especially long lower rails, it can be avoided that these are bent in the middle.

The cable drive offset from the guide rails is preferably set up to raise or lower the lower rail at a speed at which the belt drives installed in the guide rails raise or lower the lower rail. This advantageously ensures synchronicity between the drives and it can be avoided that the bottom rail along its entire length with is raised or lowered at different speeds and may be bent as a result.

The cable drive offset from the guide rails is preferably set up to wind up the cable, lined up in one layer, on the circumference of the roller along a longitudinal direction thereof. This avoids the rope winding up on top of each other, which would have the disadvantage that the constantly increasing diameter also increases the relative speed at which the lower rail, e.g. in the middle of this, is raised. Relative speed refers to the speed at which the blind curtain is moved on the sides (guide rails). By making the rope in a single layer, i.e. is always spirally lined up while it is being wound on the roller, the winding diameter can be reliably prevented from increasing. In other words, the rope is always wound up and unwound at the same speed, the speed being synchronous with the speed of other elevator devices, for example the belt drives arranged in the area of the guide rails.

The slat blind preferably further comprises at least one turning device for adjusting the inclination of at least one of the slats. As a result, the angle of inclination of the slats is reliably changed, specifically in a range between complete darkening (essentially vertical orientation) and im Essentially horizontal orientation. Thus, regardless of the position of the blinds, the user can quickly and easily regulate the incidence of light and take a look outside.

The slatted blind preferably also contains a lever mechanism, set up to translate a substantially linear movement into a tilting movement for adjusting the inclination of the lower rail. The bottom rail is suspended or stored at the end over the angled upper side (eccentrically). Therefore, compared to a solution in which the lower rail is mounted in the middle, for example, a greater force must be applied in order to incline the lower rail in the freely hanging state in the direction of the horizontal alignment. For this purpose, the lever mechanism is provided for power transmission. The lever mechanism can be designed, for example, as a toggle lever, which generates an essentially long linear movement into a relatively short tilting movement with an increased force. The lever mechanism can be any mechanism with a high power transmission or torque transmission.

The slat blind preferably further comprises a slide for receiving the lever mechanism, the slide being movable at least in sections together with the lower rail along the guide rail. The lever mechanism thus follows the vertical direction in which the lower rail is moved along the guide rail.

The turning device preferably contains a ball cord and a deflection device which is set up to deflect the ball cord in such a way that essentially parallel courses thereof are at a predetermined distance from one another. As a result, the distance between the vertical courses of the ball cord can be increased compared to previously known solutions. This increased distance allows easier operation in order to pivot the slats more easily.

It is expressly pointed out that the above embodiments can be combined as desired. Only those combinations of embodiments are excluded which would lead to contradictions through the combination.

A selection of further conceivable design variants is described in greater detail below by way of example.

1. Design variant

• seitlich angeordnete Führungsschienen,
• einen zwischen den Führungsschienen angeordneten Storenbehang mit einer Mehrzahl von Lamellen,
• eine den Storenbehang abschliessende Unterschiene, und
• wenigstens eine Aufzugsvorrichtung,

wobei die Lamellen jeweils eine abschliessende Blendenfläche und eine hierzu im oberen Abschnitt angewinkelte Oberkante aufweisen, wobei die angewinkelte
Oberkante mit jeweils seitlich vorragenden Führungszapfen bereitgestellt ist, über welche die Lamellen verschwenkbar in den Führungsschienen geführt sind, und
wobei die abschliessende Blendenfläche wenigstens abschnittsweise derart über die angewinkelte Oberkante seitlich vorragt, dass vorragende Abschnitte der Blendenfläche mit den Führungsschienen in Anlage bringbar sind und wenigstens abschnittsweise mit den seitlichen Führungsschienen überlappt sind.Slat blinds, comprising:

• laterally arranged guide rails,
• a blind curtain with a plurality of slats arranged between the guide rails,
• a bottom rail closing the curtain, and
• at least one elevator device,

wherein the lamellas each have a closing panel surface and an upper edge angled for this in the upper section, the angled
Upper edge is provided with laterally protruding guide pins via which the slats are pivotably guided in the guide rails, and
wherein the closing panel surface protrudes laterally at least in sections over the angled upper edge in such a way that protruding sections of the panel surface can be brought into contact with the guide rails and are at least partially overlapped with the lateral guide rails.

2. Design variant

Slat blinds according to the 1st variant, wherein vertically adjoining slats are at least partially overlapped.

3. Design variant

Slat blinds according to the 1st or 2nd embodiment variant, wherein the elevator device contains at least one belt drive or a belt elevator and / or wherein the elevator device contains at least one electrically and / or manually drivable drive device.

4. Design variant

Slat blinds according to the 3rd variant, wherein the at least one belt drive contains at least one toothed wheel, which is coupled to the drive device, and at least one belt, in particular a belt guided within the guide rail, the belt being coupled at the lower end to the lower rail and is at least partially in engagement with teeth of the gear at the further end.

5. Design variant

Slat blind according to the 3rd or 4th variant, further comprising at least one elevator tape, which is coupled to the lower rail at one end and can be wound up or unwound at least in sections at the other end by the at least one tape elevator.

6. Design variant

Slat blind according to one of the preceding design variants, further comprising at least one cable elevator for winding or unwinding a cable coupled to the lower rail.

7. Design variant

Slat blinds according to the 6th variant, wherein the at least one cable drive contains a rotatable roller which is coupled to the drive device, the cable being coupled at one end to the lower rail and at the other end being able to be wound at least in sections on the circumference of the roller.

8. Design variant

Slat blinds according to the 5th, 6th or 7th variant of the embodiment, the angled upper edges of the slats each being provided with at least one through-hole, and the rope or the elevator belt in the course between the Cable elevator and the lower rail or between the belt elevator and the lower rail is guided through these through holes.

9. Design variant

Slat blind according to the 6th, 7th or 8th variant of the embodiment, the cable drive being arranged in a section of the slat blind which is offset from the guide rails.

10. Design variant

Slat blind according to the 9th embodiment, the cable drive offset from the guide rails being set up to raise or lower the lower rail at a speed at which the belt drives installed in the guide rails raise or lower the lower rail.

11. Design variant

Slat blind according to the 9th or 10th embodiment variant, the cable drive offset from the guide rails being set up to wind the cable in a single layer on the circumference of the roller along a longitudinal direction thereof.

12. Design variant

Slat blind according to one of the preceding embodiment variants, further comprising at least one Turning device for adjusting the inclination of at least one of the slats.

13. Design variant

Slat blind according to the 12th variant embodiment, further comprising at least one lever mechanism, set up to translate an essentially linear movement into a tilting movement for adjusting the inclination of the lower rail, preferably further comprising at least one slide for receiving the lever mechanism (38), the slide at least in sections with the lower rail can be moved along the guide rail.

14. Design variant

Slat blind according to the 11th, 12th or 13th variant embodiment, wherein the turning device contains a ball cord and a deflecting device which is set up to deflect the ball cord in such a way that essentially parallel courses thereof are predetermined at a distance from one another.

15. Design variant

A lamella, having a closing screen surface and an upper edge angled in the upper section, the closing screen surface protruding laterally at least in sections over the angled upper edge in such a way that the protruding section of the screen surface can be brought into contact with guide rails and is at least partially overlapping with lateral guide rails and the lamella in a first diaphragm surface section, a second diaphragm surface section, a third diaphragm surface section, a first upper edge section and a second upper edge section is subdivided, in particular by angulations, preferably by alternating inner angulations and outer angulations.

Figuren la,b

eine Lamellenstore in einer ersten Ausführungsform im geöffneten Zustand des Storenbehangs in unterschiedlichen Ansichten;

Figuren 2a-c

die Lamellenstore in der ersten Ausführungsform im geschlossenen Zustand des Storenbehangs in unterschiedlichen Ansichten;

Figuren 2d,e

die Lamellenstore in einer zweiten Ausführungsform in unterschiedlichen Ansichten;

Figuren 3a-d

mehrere Seitenansichten der Lamellenstore zur Erläuterung einer Abfolge zum Öffnen eines in der Anfangsstellung geschlossenen Storenbehangs;

Figuren 4a-d

mehrere Detailansichten von einem Hebelmechanismus zum Neigen einer Unterschiene;

Figuren 5a-d

mehrere Detailansichten zur Erläuterung einer Abfolge zum Schwenken der Unterschiene von einer horizontalen Anfangsstellung in eine Schliessstellung;

Figuren 6a-g

mehrere Ansichten eines Seilaufzuges;

Figuren 7a,b

jeweils eine Seitenansicht auf eine Führungsschiene und einen Seilaufzug;

Figuren 8a-c

mehrere Ansichten von einer Wendeeinrichtung;

Figuren 9a-c

mehrere Ansichten von einer Wendeeinrichtung; und

Figuren 10a-d

mehrere Ansichten einer Lamelle.

In the following, the present invention or (partial) aspects of the present invention are explained further with reference to exemplary embodiments shown in the drawings. Show:

Figures la, b

a slat blind in a first embodiment in the open state of the blind curtain in different views;

Figures 2a-c

the slat blinds in the first embodiment in the closed state of the blind curtain in different views;

Figures 2d, e

the slat blinds in a second embodiment in different views;

Figures 3a-d

Several side views of the slatted blinds to explain a sequence for opening a blind curtain that is closed in the initial position;

Figures 4a-d

several detailed views of a lever mechanism for tilting a lower rail;

Figures 5a-d

several detailed views to explain a sequence for pivoting the lower rail of a horizontal starting position in a closed position;

Figures 6a-g

several views of a cable elevator;

Figures 7a, b

each a side view of a guide rail and a cable elevator;

Figures 8a-c

several views of a turning device;

Figures 9a-c

several views of a turning device; and

Figures 10a-d

several views of a lamella.

Figures la, b each show a slat blind 10 in a first embodiment in different views. The slat blind 10 contains two guide rails 12 (for reasons of illustration only one guide rail is shown) for vertically guiding a blind curtain 14 arranged between the guide rails 12, which in turn contains a plurality of slats 16'-16 '' '. In FIGS. 1 a, b, the slat blind 10 is shown in the open state of the blind curtain 14. Although only three slats 16'-16 "'are shown in the drawing, a typical venetian blind 10 contains significantly more slats.

The blind curtain 14 is closed below by a lower rail 18. In the example shown, the lower rail 18 is supported in the center via a rope 20 connected to it, so that the lower rail 18 will not sag. The rope 20 is wound or unwound from a cable elevator 22 on the circumference of a roller (not shown). The cable elevator 22 thus prevents, in particular with very wide slat blinds 10, the (long) lower rail 18 sags or is bent in the middle, as described in more detail below.

The lower rail 18 is moved up and down by means of a belt drive 24 which is integrated in the guide rail 12 (described in more detail below). When the lower rail 18 is moved up, slats positioned one above the other are sequentially picked up and moved further upwards with the lower rail 18 and slats that have already been picked up until this slat also receives a previously higher-level slat, and so on (generally known as the venetian blind principle). The package of the lamellas and the lower rail 18 itself can assume a high overall weight, which is reliably absorbed by the belt drive 24 on the sides. The belt drive 24 contains a toothed wheel 26 which can be driven to rotate. The gear wheel 26 engages with a belt 28 which is guided within the guide rail 12. The belt 28 is in turn coupled to the lower rail 18 at the lower end. During one revolution of the gear wheel 26, the rotary movement is thus converted into a linear movement of the belt 28 for raising or lowering the lower rail 18. In the example shown, the belt 28 is designed as a perforated belt.

The slat blind 10 also contains two turning devices 30 ′, 30 ″ for adjusting the inclination of the slats 16′-16 ″ ″, as explained in more detail below. These are at least the individual lamellas 16'-16 '''in sections along their longitudinal sides, at opposite points in each case, coupled with cords 32a', 32b 'and 32a'', 32b ". The lamellas 16'-16''' each have a screen surface The panel surfaces of the individual slats 16'-16 '''here in their entirety form the external surface of the external blind facing, as in FIG Figures 2a-c which represent the slat blinds 10 according to the first embodiment in the closed state of the blind curtain 14. The angled upper edge is canted inwards and forms an angle with the respective faceplate in a range from 50 ° to 90 °, essentially 70 °. The individual upper edges each have laterally protruding guide pins 34'-34 '''. The individual lamellae 16'-16 '''are guided in the guide rails 12 in a pivotable and vertically adjustable manner via their guide pins 34'-34'''. For this purpose, the guide rails 12 each have a vertically extending recess.

The panel surface protrudes laterally at least in sections over the angled upper edge (see in particular Figures 2b-e ). Here, the panel surfaces protrude in such a way that their rear surfaces can each be brought into contact with the guide rails 12 (see in particular Figures 2b, c ). In other words, the laterally protruding sections of the screen surfaces overlap with sections of the respectively assigned guide rail 12. This overlap does not cause any fall Light between the slats 16'-16 '''and the side guide rails 12 into the interior of the building. Compared to the prior art, in which a gap is established between the slats 16'-16 '''and the guide rails 12, a significantly higher degree of darkening of the slat blinds 10 is thus created overall.

In Figures 2d, e each of the slat blinds 10 is shown in a second embodiment. In this second embodiment, the lower rail 18 is moved up or down via two belt lifts 35 ', 35 ". For this purpose, lift tapes 36', 36", which are each fixed to the lower rail 18, are wound up by the respectively assigned belt lift 35 ', 35 " In the embodiment shown, the turning devices 30 ', 30 "and belt lifts 35', 35" are each integrated into a unit. Although not shown, the turning devices 30 ', 30 "and belt lifts 35', 35" can be separate Regardless of whether they are integrated together or separately, more than two turning devices 30 ', 30 "and belt lifts 35', 35" can also be provided Figures 2d, e The embodiment shown, the lower rail 18 is not pivoted. Only the lamellae 16'-16 '''can be pivoted here.

As in Figures 2b, e As shown, the upper edge of each of the lamellae 16'-16 '''is provided with at least one through hole 37, also referred to as a lamella punching (in Figure 2b for illustrative reasons only to be seen with lamella 16 '). The through hole 37 is used to carry out the Rope 20 (see the in Figures 2a-c first embodiment shown) or the elevator tape 36'-36 "(see the in Figures 2d, e second embodiment shown). In contrast to the prior art, the rope 20 or the elevator tapes 36'-36 "thus run (in the closed state of the blind curtain 14) completely behind the panel surface.

This has the advantage that in the closed state of the blind curtain 14 no through-holes for guiding the cable 20 or elevator tape 36 ', 36 "are exposed on the outside through which through-holes light can enter. In other words, falls in the area of the cable elevator 22 or the Belt elevator 35 ', 35 "no light into the interior of the building. The slat blind 10 thus enables complete darkening, as has been previously unattainable in the prior art.

The rope 20 (see FIG Figures 2a-c ) or run the elevator bands 36 ', 36 "(see Figures 2d, e ) in the closed state of the blind curtain 14 completely in the inner area of the slats 16'-16 '''and is or are thus protected from UV exposure. Thus, the rope 20 or the elevator tapes 36 ', 36 "are protected against premature wear. Compared to the prior art, this reliably prevents the rope 20 from breaking prematurely or the elevator tapes 36', 36" from breaking prematurely .

Figures 3a-d each show a side view of the pivotable lower rail 18 to illustrate a lever mechanism 38 for lever-like support for the erection of the lower rail 18 from the essentially vertical alignment (see FIG Figure 3a ) in an essentially horizontal orientation (see processes in Figures 3b-d ). In Figures 4a-d and 5a-d detailed views of the lever mechanism 38 are shown. Since the lower rail 18 ends, ie eccentrically, via its guide pin (see e.g. Figure 1b ) is suspended or stored, in contrast to a solution in which a lower rail 18 is mounted essentially in the middle, an increased force must be applied in order to erect the lower rail 18. This is supported by the lever mechanism 38, which, similar to the principle of a toggle lever, transfers the lower rail 18 into the horizontal position (and vice versa into the vertical position). A boom 40 or lever arm of the lever mechanism 38 engages in an articulated manner on a central section 42 of the lower rail 18 in order to apply an increased pressure force to erect the lower rail 18 according to the principle of an extended lever arm. The lever mechanism 38 is received in a slide 43, via which the lever mechanism 38 can be moved together with the lower rail 18 along the guide rail 12.

Figures 4a-d each show the lever mechanism 38 in a detailed view. Figures 5a-d 12 show views of the lever mechanism 38 in a sequence for moving the bottom rail 18 from the horizontal orientation (see FIG Figure 5a ) into the essentially vertical orientation (see Figure 5d ).

Figures 6a-g show the previously explained cable drive 22 in several explanatory views. As mentioned above, the cable drive 22 serves to prevent bending of a particularly long lower rail (see e.g. Figure 1a ). The cable drive 22 contains a roller 44 for rolling up and unrolling the cable 20 (see Figures 6a, d ). The roller 44 serves to receive the rope 20 over its circumference. Here, the cable 20 is guided through an opening 48 registered in the housing 46 of the cable drive 22. The cable drive 22 is capable of winding or unwinding the cable 20 in a single layer, ie in a spiral, on the circumference of the roller 44 along a longitudinal direction thereof. For this purpose, the roller 44 is displaced in said longitudinal direction. For longitudinal displacement, the circumference of the roller 44 is provided with an external thread which engages with an internal thread section 50, which in turn is statically fixed to the housing 46 of the cable drive 22 or is formed in one piece with it. When the roller 44 rotates, it is threadedly advanced to the left or to the right. With the rotation of the roller 44, the rope 20 is thus simultaneously wound or unwound onto the circumference of the roller 44 and, in this case, likewise lined up in a single layer by the longitudinal displacement of the roller. This avoids the rope 20 being wound up in several layers - along with a steadily increasing diameter - which in turn means that the diameter remains the same Speed, the speed at which the rope 20 is wound increases. In other words, the cable drive 22 allows winding and unwinding of the cable 20 at a constant speed, or at a speed which is always the same (synchronous) with the speed of other elevator devices (e.g. the belt drives installed within the guide rails (see e.g. Figure 1b )). The cable drive 22 thus allows windings with a constant diameter.

Figure 6d Fig. 10 illustrates an example of the roller 44 which includes a sectionally spiral rope take-up. For this purpose, the roller 44 contains a spiral winding section 52 with a spiral increasing radius. This makes it possible for the rope 20, starting from the closed state of the slatted blinds, to be wound up with a lower rope winding speed during the first turn. A structurally simple and reliable measure thus creates the possibility of minimizing overflow.

Figures 7a, b illustrate the previously explained principle of the cable drive 22, each in a detailed view. Here, the roller 44 is formed with the spiral winding section 52 with a spiral increasing radius.

Figures 8a-c illustrate detailed views of the turning device 30 '(see also Figure 1b ). The turning device 30 'contains, as in Figure 8b illustrates a deflection device 54 via which a ball cord 56 can advantageously be deflected by the turning device 30 'at one end in such a way that the two vertically and parallel sections of the deflected ball cord 56 are as far as possible maximally spaced from one another. Operation is made easier here. Figures 9a-c illustrate the principle of the deflection of the ball cord 56 in further detailed views.

The Figures 10a-d show an embodiment of a slat, as it can be used, for example, but not exclusively, in one of the slat blinds described so far. The lamella 116 is subdivided into a diaphragm surface 120 and an upper edge 130. With respect to the course of the diaphragm surface 120, the upper edge 130 is angled and can be canted inwardly or beaded inwardly. The upper edge 130 is preferably angled at an angle α of 50 ° to 80 °, in particular 60 ° to 70 °, such as α = 66 °, for example, with respect to the diaphragm surface 120. The screen surface 120 itself comprises three sections, a first screen surface section 121 adjoining the upper edge 130, a terminal third screen surface section 123 and a second screen surface section 122 lying between the first screen surface section 121 and the third screen surface section 123. The third screen surface section 123 can also be directed inwards be canted or beaded facing inwards. The upper edge 130 comprises two sections, a terminal first upper edge section 131 and one on the second upper edge section 132 adjoining the screen surface 120. The subdivision of the sections is given by changes in the course of the lamella, in particular by a bend or angle. If the angling of the upper edge 130 in relation to its course relative to the panel surface 120 is angled inwards, the subdivision between the third and second panel surface sections 123, 122 is characterized by an inner angle, the division between the second and first panel surface sections 122, 121 characterized by an outer angulation and the transition from the diaphragm surface 120 to the upper edge 130, and thus the subdivision between the first diaphragm surface section 121 and the second upper edge section 132, characterized by an inner angled. On the other hand, the first and second upper edge sections 131, 132 are again characterized by an outer angle. Inner and outer angulation thus alternate in the course of the slat cross-section, starting from the free end of the screen surface 120 with an inner angulation.

In Figure 10b is the interaction of three, as in Figure 10a Slats 116, 116 ', 116''described in more detail are shown. It can be seen that, in particular, the course of the first and second diaphragm surface sections 121, 122 of one lamella 116 ″, which forms an S-bend, creates space for receiving the end of the third diaphragm surface section of the lamella 116 'arranged above it, which is shown here flanged (see Fig dashed circle). In this way, an optically flat curtain surface is provided, which is indicated by the vertical dashed line. The area 155 is also shown, in which there are preferably through-holes for the passage of ropes and / or elevator tapes. It is crucial for good darkening that the through-hole of one lamella 116 ′ is covered in the closed state by the screen surface of the lamella 116 arranged above it. The line 160 marks the limit of the overlap of the lamella 116 and 116 '. The through bores are preferably located on a straight line, in particular on the axis of rotation of the lamella 116 ′ defined by the pivot point 135. For the sake of clarity, the area 155 and the pivot point 135 are only shown for the lamella 116 '.

In Figure 10c a lamella 116 can be seen in different views. The bottom view shows a cross section of the lamella 116 in the closed and thus essentially vertical position, the middle view shows a cross section of the lamella 116 in the open and thus essentially horizontal position, and the upper view shows a top view of the lamella 116 The laterally protruding guide pin 134, the cylinder axis of which forms the pivot point 135, can be clearly seen from above. Drawn in the Figure 10c are various distances, such as the depth t of the slat, the distance X1 of the horizontal slat from the pivot point 135 of the slat to the end of the protruding section 125 of the panel surface 120, which can be brought into contact with the guide rail, the distance X2 of the vertical slat from Pivot point 135 of the lamella to the end of the protruding section 125 of the diaphragm surface 120, and the distance X3 from the end of the lamella to the end of the protruding section 125 of the screen surface 120. The distances X1 and X2 are, for example, in a range from 10 to 20 mm, such as 14 mm, the width b is, for example, in a range from 60 to 80 mm, such as 69 mm.

The protruding section 125 can both be brought into abutment with a guide rail and also overlap with the guide rail. Overlapping is made possible, for example, in that the width b _{A of} the protruding section 125 is selected so that this width b _A at least partially protrudes beyond the part 1341 of the guide pin 134, which is received by a guide rail in the assembled state, for example by the width b _z .

Figure 10d shows two views of a lamella 116. The upper view is a cross section, the lower view is a plan view. This lower view serves in particular to illustrate where the diaphragm surface section 121, 122, 123 and upper edge section 131, 132 shown on the basis of the cross-section can be found in the top view of the lamella. It can also be seen where in the cross section of the lamella the protruding section 125 of the screen surface 120 is located, which can be brought into contact with the guide rail. If you put the Figures 10b and 10d in relation to each other, it can be seen that the third panel surface section 123 of a lamella 116 comes to rest on a lamella 116 'arranged below it in such a way that a first area of the protruding section 125 of the lamella 116' is also covered. Line 160, which is the border of the Overlapping of the lamella 116 and 116 'indicates, also in the Figure 10d transfer.

• die abschliessende Blendenfläche 120 wenigstens abschnittsweise derart über die abgewinkelte Oberkante 130 seitlich vorragt, dass der vorragende Abschnitt (125) der Blendenfläche (120) mit Führungsschienen in Anlage bringbar ist und wenigstens abschnittsweise mit seitlichen Führungsschienen überlappt ist;

die Lamelle in einen ersten Blendenflächenabschnitt 121, einen zweiten Blendenflächenabschnitt 122, einen dritten Blendenflächenabschnitt 123, einen ersten Oberkantenabschnitt 131 und einen zweiten Oberkantenabschnitt 132 unterteilt ist, insbesondere durch Winkelungen, insbesondere durch alternierende Innen-Winkelungen und Aussen-Winkelungen.Can be summarized in the Figures 10a-d The slat shown can be described as follows:
A lamella 116, having a closing screen surface 120 and an upper edge 130 angled for this purpose in the upper section, wherein:

• the closing screen surface 120 protrudes laterally at least in sections over the angled upper edge 130 in such a way that the protruding section (125) of the screen surface (120) can be brought into contact with guide rails and is at least partially overlapped with lateral guide rails;

the lamella is divided into a first panel surface section 121, a second panel surface section 122, a third panel surface section 123, a first upper edge section 131 and a second upper edge section 132, in particular by angles, in particular by alternating inside angles and outside angles.

Claims (15)

Cable elevator (22) for winding or unwinding a cable (20) coupled to the lower rail (18) of a blind (10),
wherein the cable elevator (22) comprises: - A rotatable roller (44) for receiving the rope (20) in a single layer on its circumference along a longitudinal direction of the roller (44) and with an external thread; - A housing (46) for receiving the roller (44) with an opening (48) for the passage of the rope (20); - an internally threaded section (50) which can be brought into engagement with the external thread of the roller and which can be statically fixed to the housing (46) or is formed in one piece with it. Slat blind (10), comprising: - laterally arranged guide rails (12), - A blind curtain (14) arranged between the guide rails (12) and having a plurality of slats (16'-16 '''), - A lower rail (18) closing off the blinds (14), and - At least one elevator device (24; 35 ', 35 "), the elevator device (24; 35', 35") comprising a cable elevator according to claim 1. Slat blind (10) according to claim 2, wherein the elevator device (24; 35 ', 35 ") at least one Belt drive (24) or a belt elevator (35 ', 35 ") contains and / or wherein the elevator device (24; 35', 35") contains at least one electrically and / or manually drivable drive device. Slat blind (10) according to claim 3, wherein the at least one belt drive (24) contains at least one toothed wheel (26), which is coupled to the drive device, and at least one belt (28), in particular a belt (12) guided within the guide rail (12). 28), the belt (28) being coupled at the lower end to the lower rail (18) and at least partially in engagement with teeth of the gearwheel (26) at the other end. Slat blind (10) according to one of Claims 3 to 4, further comprising at least one elevator belt (36 ', 36 ") which is coupled at one end to the lower rail (18) and at the other end at least in sections through the at least one belt elevator (35 ', 35 ") can be wound up or unwound. Slat blind (10) according to one of Claims 2 to 5, the cable drive (22) being arranged in a section of the slatted blind (10) which is offset from the guide rails (12). Slat blind (10) according to claim 6, wherein the cable drive (22) offset from the guide rails (12) is set up to connect the lower rail (18) with a Raising or lowering the speed at which the belt drives (24) installed in the guide rails (12) raise or lower the lower rail (18). Slat blind (10) according to one of Claims 2 to 7, further comprising at least one turning device (30 ', 30 ") for adjusting the inclination of at least one of the slats (16'-16"'). Slat blind (10) according to claim 8, further comprising at least one lever mechanism (38) similar to the principle of a toggle lever for translating a substantially linear movement into a tilting movement for adjusting the inclination of the lower rail (18), preferably further comprising at least one carriage (43) for receiving by the lever mechanism (38), wherein the carriage (43) can be moved at least in sections with the lower rail (18) along the guide rail (12). Slat blind (10) according to one of claims 8 to 9, wherein the turning device (30 ', 30 ") contains a ball cord (56) and a deflection device (54) which is set up to deflect the ball cord (56) in such a way that essentially parallel courses which are predetermined spaced apart. Slat blind (10) according to one of Claims 2 to 10, the slats (16'-16 ''') each having a closing panel surface and an upper edge which is angled in the upper section and which is angled Upper edges (130) of the slats (16'-16 ''') are each provided with at least one through hole (37), and the rope (20) or the elevator tape (36', 36 ") in the course between the rope elevator (20 ) and the lower rail (18) or between the belt lift (35 ', 35 ") and the lower rail (18) through these through-holes (37). Use of a cable elevator (22) according to one of Claims 1 to 11 for winding or unwinding a cable (20) coupled to the lower rail (18) of a slatted blind (10), in particular for a single-layer row of the cable (20) on the circumference of the roller (44) or for unwinding the rope (20) in one layer from the circumference of the roller (44). A roller (44) with an external thread for use in a cable elevator (22) according to any one of claims 1 to 11, comprising in the interior of the roller a spiral winding section (52) with a spiral increasing radius. Use of a roller (44) according to claim 13 for winding or unwinding a cable (20) coupled to the lower rail (18) of a slatted blind (10), in particular for lining up the cable (20) in a single layer on the circumference of the roller (44) or for unwinding the rope (20) from the circumference of the roller (44) in one layer. Method for winding or unwinding one coupled to the lower rail (18) of a slatted blind (10) Cable (20) by means of a cable elevator (22) according to one of claims 1 to 11, comprising: - rotating the roller (44); - Displacement of the roller (44) in a longitudinal direction by rotating the roller (44); - Single-layer stringing of the rope (20) on the circumference of the roller (44) with the rotation of the roller (44) or single-layer unwinding of the cable (20) from the circumference of the roller (44) with the rotation of the roller (44).

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