EP1840320A1 - Cable operated blind - Google Patents

Abstract

The arrangement has cable pull system and the end strips (22) are guided by a cable push system in a fixed angle for the rotation axis of the receiving shaft (13).The winding of the extended parts of the blind foils for blind-surface (21) takes place right-angled to the axis of rotation of the receiving shaft.

Description

The invention relates to a roller blind with cable system according to the type specified in the preamble of claim 1.

Roller blinds for shading glass surfaces on buildings are known in various embodiments. In the basic form for vertical installation position, the roller blind consists of an upwardly arranged take-up shaft for winding and unwinding a roll-up roll cover, the free-hanging end of which is weighted down by a cover strip. The roll cover is either a decorative fabric or a so-called roller blind made of polyester with aluminum coating for reflection of heat radiation. Such so-called film blinds are characterized by excellent optical and heat-effective properties, and the low material thickness of the roller blind film allows particularly compact designs. To operate the blinds manual or electric drives are known in many variants.

Furthermore, roller blinds with countersteering device are known in which, for example, tension cables are fastened to the end strip, which transfer a specific counter-tractive force to the roller cover and thereby follow the movements during winding and unwinding. Thus, the blind works even in non-vertical mounting position from oblique to horizontal and upside down with upward movement. The traction cables or other traction means are usually wound up and unwound on winches, for example, a Spring motor is provided for driving the winches or the take-up shaft. Also known are counter-locking devices with feedback to the take-up shaft, which couple for example via gears or similar coupling links acting on the winch counter-pull force with the drive of the take-up shaft. To tighten the roll cover and to synchronize the rotational movements usually resilient members such as tension spring are provided.

The FR2686372 and the FR2578901 Describe, for example, roller blinds with Gegenzugmittel and feedback of this type. In both patents are provided as Gegenzugmittel two pull ropes, each winding on a winch and attacked by prestressed tension springs on the end strip. Similar constructions are also known in the context of roller shutters and roller shutters. However, all of these designs only work reliably in a relatively large design and stable roll cover, which winds up and unwinds with a relatively large winding diameter and a few turns.

In the case of film roller blinds in a compact design, a fundamental difficulty is reliably winding a thin roller blind film with a small winding diameter over a relatively large number of turns. This is problematic because on the one hand, the roller blind film is quite unstable in the surface and can hardly be performed by a lateral guide, and on the other hand because the recording wave due to the thin diameter under load relatively strong bends, so that therefore no Reliable guidance is guaranteed for precise tracking.

On the other hand, film blinds in an extremely compact design are interesting for use in the space between the panes of insulating glass, which usually has a pane spacing of only 18 to 22 mm.

The EP 0 483 528 describes, for example, a compact film roller blind with countersteering device, which is intended for installation in an insulating glass. The solutions presented herein relate essentially to the mechanics of the counter-device, wherein a relatively thick roller blind film of more than 50 μm is provided. However, according to our experience, this film blind can only be installed in insulating glass with an oversized glass spacing of about 27 mm. The proposed counter-pulling device with two acting on the end strip Gegenzugseilen, each wound on a winding spool as desired crosswise and transversely, has the disadvantage that an exactly synchronous movement of the two Gegenzugseile can not be guaranteed. There is therefore a risk that the roller blind film forms wrinkles and laterally drifts out of the track during winding. This is especially true for thinner roller blind film with about 20μm total thickness, which is not mentioned in the patent, however.

The DE 196 10 268 , which also describes a film roller blind for installation in an insulating glass element, presents a solution to the aforementioned problem of wrinkling. It uses only a single pull-rope, which attacks on the sides of the end bar on cable deflections and is guided at the same from side to side. In this way, it is ensured that the countersteering device with exactly symmetrical tensile forces on the end bar attacks. However, this cable guide can not prevent the roller blind film drifts laterally during winding, such as due to an imprecise alignment of the recording shaft. To solve this problem, a clamping axis for supporting the receiving shaft is proposed according to claim 7, which is intended to reduce the deflection under load. However, this construction is quite expensive and solves the problem only partially. For example, an unbalanced load, such as by frictional force of the end strip on one side or the other, cause a misalignment of the coil with malfunction.

Furthermore, special roller blind foils with embossing are known, which have a stabilizing effect and also improve the overall appearance.
The DE 101 10 155 describes, for example, a roller blind foil with embossing lines parallel to the receiving shaft, which give the foil surface a wave-shaped profile. On the one hand, such embossing lines advantageously increase the stability of the film surface; on the other hand, they have the disadvantage of preventing them from winding up in layers lying one on top of the other. The result is a fairly loose and flexible film winding, which naturally does not guarantee a precise guidance of the roller blind film by positive engagement with the take-up shaft.

In summary, it can be stated that film roller blinds, which have a counteracting means for a non-vertical installation position and at the same time a thin receiving shaft for a compact design, pose considerable technical problems which are only inadequately solved. Furthermore is the mounting position in edgewise, in which the roller blind foil from a vertical recording wave in the horizontal direction and wound up, for the reasons set out above not possible.

The invention has for its object to provide a roller blind of the type mentioned above, which in particular in a compact design and in any mounting position, including edgewise, reliable and true to the track and unwinds, and at the same time is inexpensive to produce.
This object is achieved by the characterizing features of claim 1 in conjunction with its preamble features.

The basic idea of the blinds according to the invention with cable system is to guide the roller blind film during winding and unwinding exclusively by exact alignment of the end strip at a fixed angle to the axis of rotation of the take-up shaft. One way to achieve this is a cable system, which acts as an unsprung, rigid train connection on the end strip and the same leads with great precision during winding and unwinding true to the angle. The end bar also moves without lateral guidance in the balance of forces of tensile and return force on a linear path that is exactly perpendicular to the axis of rotation of the take-up shaft, and it leads to the surface of the projecting part of the roller blind righthanded to the axis of rotation, so this inevitably wound up true to the original.

In contrast to known roller blinds, which also have on the end strip attacking pull ropes, goes Guiding the roller blind film according to claim 1 not from the take-up shaft but from the end strip. This concept makes use of the fact that, especially with a compact design, a guide is much more precise via the end strip than the take-up shaft, since both the relatively thin take-up shaft and the film roll can have considerable flexibility, so that accurate guidance during winding is generally possible is not guaranteed. In other words, the end strip is rigid and precisely guided, and the relatively flexible film winding depends on the pulling forces from the end strip.

3 bis 5:

Ausgestaltung der Rollo-Folie.

6 bis 10:

Ausführungsformen des Seilzugsystems.

11 bis 21:

Gegenzugeinrichtung und Rollo-Antrieb

The high-precision guidance of the end strip by the cable system is preferably achieved in principle by pulling cables without further intermediate links, such as tension spring or winches, attack as a rigid train on the end strip. For this purpose, several embodiments of the cable system are suitable, and these can also be advantageously combined with special embodiments of the roller blind film, the Gegenzugeinrichtung and the roller blind drive. These form the subject of the subclaims, which include:

3 to 5:

Design of the roller blind film.

6 to 10:

Embodiments of the cable system.

11 to 21:

Counter and roller blind

Fig.1

ein Seilzugsystem mit Halteseile und Bediengriff;

Fig.2

ein Seilzugsystem mit Umlaufseile und Freilaufkupplung zur Aufnahmewelle;

Fig.3

ein Seilzugsystem mit Umlaufseile, Gegenzugeinrichtung und Elektromotor;

Fig.4

ein Seilzugsystem mit Mittel-Seil, Seiten-Seile und Führungskanal für eine Seilkupplung;

Fig.5

den Führungskanal und die Seilkupplung im Detail;

Fig.6

das Seilzugsystem wie Fig.4 und zusätzlich mit einer Gegenzugeinrichtung, Zweiwegekupplung und Elektromotor;

Fig.7

eine Rollo-Folie mit Keilanschnitt;

Fig.8

ein Rollo im Isolierglas mit geprägter Rollo-Folie und Magnetkupplung als Rollo-Antrieb.

The roller blind according to the invention with cable system is described below with reference to the embodiments schematically illustrated in the drawings. In these shows:

Fig.1

a cable system with tethers and control handle;

Fig.2

a cable system with circulating cables and overrunning clutch to take-up shaft;

Figure 3

a cable system with circulating ropes, Gegenzugeinrichtung and electric motor;

Figure 4

a cable system with middle rope, side ropes and guide channel for a cable coupling;

Figure 5

the guide channel and the cable coupling in detail;

Figure 6

the cable system as Figure 4 and in addition with a counter-pulling device, two-way clutch and electric motor;

Figure 7

a roller blind foil with a wedge cut;

Figure 8

a roller blind in the insulating glass with embossed roller blind film and magnetic coupling as roller blind drive.

1 schematically shows the roller blind in a special embodiment of the cable system, which is characterized by two fixed holding cables 4A, 4B. Shown are the take-up shaft 13 with the film roll 20 and an unwound to the roller blind surface 21 part of the roller blind foil with end strip 22, which has a control handle 23 for manual operation. For driving the take-up shaft 13, for example, a spring motor is suitable, which is not shown in Figure 1, however. The cable system for guiding the end strip 22 in this case consists of the two retaining ropes 4A, 4B, which are fixed to the frame of the blinds at lower fixed points 4a and 4b and upper fixed points 4c and 4d. The frame is shown in Fig. 1, however, only partially in the form of a arranged on the head-side of the blinds cross strut 12. As is apparent from Fig. 1, the two retaining cables 4A, 4B guided by a respective first and a second cable guide 41, 42 and 43, 44 along the end strip 22 from the sides towards the center. This cable guide ensures that the end strip 22 is guided parallel to the axis of rotation of the receiving shaft 13 during winding and unwinding or exactly at a fixed angle to the same.

The cable system with tethers 4A and 4B can be varied widely. In the variant shown in FIG. 1, the holding cables 4A, 4B are guided in the upper section in the middle of the roller blind surface 21. This is advantageous, for example, in horizontal mounting position, because in this case the film surface 21 is supported against sagging. In another variant, the second cable deflections 42 and 43 are not arranged in the middle but on the respective opposite side of the frame of the roller blind, so that the cross member 12 is not needed. In addition, variants with unbalanced cable guide are possible, for example, to take into account a one-sided force when installed in upright.

2 schematically shows the roller blind in a further specific embodiment of the cable system, which is characterized by two fixed to the end strip 22 circulating ropes 3A, 3B.

As is apparent from Fig. 2, each of the two circulating ropes 3A, 3B starting from the fixed points 2a and 2b to Seilumlenkungen 35 and 36 on the head-side, from there back in the opposite direction to cable deflectors 31 and 33 on the foot Side of the roller blind, from there crosswise to each alternating side and led by means of a third cable deflection 34 and 32 in the direction of the head-side to end strip 22, where they are finally fixed to the fixed point 2b and 2a. This cable guide ensures precise guidance of the end strip 22 at a fixed angle to the axis of rotation of the recording shaft.

Instead of two individual circulating cables 3A and 3B, this cable system could also be made from only one continuous circulating cable, in which the sections bounded by the fixed points 2a and 2b correspond to the circulating cables 3A and 3B.

Furthermore, FIG. 2 shows a special development in which the take-up shaft 13 is coupled by way of one-way clutches 14 and 14 'with cable deflectors 35 and 36 designed as pulleys. Both one-way clutches 14 and 14 'act here in the winding direction and thus generate a tensile stress on the roller blind surface 21st

In the illustrated embodiment, the diameter of a cable guide 36 is chosen so small that the associated one-way clutch 14 engages only during winding. Conversely, the other cable deflection 35 is chosen so large that the overrunning clutch 14 'engages only during unwinding. In this way, the cable pull system simultaneously acts as a drive of the take-up shaft 13, which enables inexpensive production, for example, for a manually operated roller blind with operating handle 23.

The coupling by one-way clutches 14, 14 'can be configured and varied in many ways. In a simplified Embodiment recording shaft 13 is coupled only via a single overrunning clutch, wherein the two cable deflectors 35 and 36 are interconnected by a shaft. In one development, the overrunning clutch is combined with a slip clutch which limits the resulting tension on the roller blind surface 21.

3 shows a development of the cable system shown in Figure 2 with circulating ropes 3A, 3B, in which the roller blind is additionally equipped with an electric motor M and a fed back counter-pulling device 70.

In the embodiment shown, the counter pull device (70) uses a counter pull cable 6A, which is fixed to one of the two circulating ropes 3A by a cable coupling 60 and thus transmits a counter pull force at the fixed point 2b to the end strip 22. Also possible would be a variant in which the Gegenzugseils 6A or another traction means directly on the end strip 22 attacks.

From the illustration it can be seen how the Gegenzugseil 6A is guided over cable deflections 61 and 62 to a cone-shaped winch 71. Further, a drive shaft 93 is shown, which produces a rotationally fixed connection with an electric motor M and a spur gear 80, the output of which is coupled to the take-up shaft 13. Thus, the electric motor M acts directly as a roller blind drive on the take-up shaft 13, wherein instead of the spur gear 80, a toothed belt drive or a similar coupling member are suitable.

The winch 71 is rotatably mounted relative to the drive shaft 93 and coupled thereto by a clamping member 81. The tensioning member 81 is, for example, a torsion spring or mainspring, which is prestressed and thereby drives the winch 71 or generates the counter-pull force on the pull-back cable 6A.
In this way, the counter-force acting on the winch 71 is advantageously fed back to the take-up shaft 13, wherein the tensioning member 81 compensates for differences in the rotational movements over a certain spring travel.

In the winch 71 shown in Fig. 3 it is provided that the cable guide 62 is moved by a - not shown in Fig. 3 - gear synchronous with the rotation of the drive shaft 93 via a travel S so that the Gegenzugseil 6 A in adjacent layers up or unwound. Also suitable is a variant in which not the cable guide 62 but the winch 71 is moved by the travel S accordingly. The conical shape of the winch 71 is not absolutely necessary but advantageous, because thus the increasing and decreasing in the winding and unwinding diameter of the roller-20 is taken into account. This construction is characterized by compact design and precision when winding and unwinding over many turns.

4 schematically shows the roller blind in a further specific embodiment of the cable system, which is characterized by two side cables 5A, 5B and a middle cable 5M.

In this cable guide, the two side cables 5A, 5B pull the end bar 22 in the unwinding direction from the lateral fixed points 2a and 2b, while the middle cable 5M engages in the opposite direction at the fixed point 2m in the middle. In this way it is ensured that the end strip 22 is guided at a fixed angle to the axis of rotation of the take-up shaft.

For guiding the middle cable 5M, a transverse strut 12 with cable deflections 55 and 56 is provided which, comparable to the embodiment shown in FIG. 1, belongs to the frame of the roller blind. As can be seen from FIG. 4, the central cable 5M supports the roller blind surface 21 in the middle region, and at the same time forms, together with the lateral cables 5A, 5B, a circulating cable system, all three cables being fixed to a cable coupling 60. From the illustration it can be seen that the one side cable 5A is deflected only once by the cable guide 52 and the other 5B twice by the cable guides 53 and 54.

In a further development, a guide channel 63 is provided, which is arranged for guiding the cable coupling 60 on one side of the roller blind. This is designed so that the cable coupling 60 is guided according to the travel of the end bar 22 on a linear path in a plane. The latter prevents twisting of the cable coupling 60 and thus the twisting of the two side ropes 5A, 5B to a twist, which could affect the movement in the area of the cable deflections 53, 54.

5 shows schematically special embodiments of the cable coupling 60 for connecting the Gegenzugseils 6A with side ropes 5A, 5B. Also shown is the guide channel 63 in plan view and in cross section.

The detail view here shows a preferred variant in which the two side ropes 5A and 5B are made of a single piece of rope. This is fixed at the fixed point 5x and forms with the two rope halves the side ropes 5A and 5B.

In order to be able to disassemble the roller blind into individual assemblies, such as for shipping, it is provided that the cable coupling 60 has a detachable connection 6x such as hooks, eyes and the like to the Gegenzugseil 6A.

5 shows the guide channel 63 with an open profile 64 such that on the one hand the assembly or disassembly of the cable system through the slot-like opening 64 is possible, on the other hand, the cable coupling 60 is guided by positive engagement in a plane on the linear path to a Twisting the parallel side ropes 5A and 5B to prevent.

Next, the cross-sectional drawing represents a preferred development in which the guide channel 63 is integrated in a side part which belongs to the frame of the roller blind. The opening 64 of the guide channel 63 is directed outwards, so that the appearance of the front of the frame is not affected. On the side facing inwards, the side part has a U-profile for covering the roller blind foil with end strip 22 on the side edge.

6 shows a development of the cable system shown in Figure 4 with side ropes 5A, 5B and middle cable 5M, in which the roller is additionally equipped with an electric motor M, a counter-pulling device 70, a spur gear 80 and a two-way clutch 90 ,

The cable pull system shown is characterized in comparison to the version shown in Figure 4 in that the two side ropes 5A, 5B are the same length. This solution has the advantage that a length-specific shrinkage or stretching of the side ropes 5A, 5B, for example due to aging processes or temperature changes, does not affect the guidance of the end strip 22.

For the cable guide of the extended for this purpose first side cable 5A several solutions are suitable. The cable guide shown in Fig. 6 is a preferred variant in which - as shown - the extended side cable 5A is deflected by an additional cable deflection 51 of the end strip 22 and from there along it to the fixed point 2a 'is guided at the opposite end.

The illustrated counter-pulling device 70 with clamping member 81 and helical gear 80 as a torsionally elastic feedback corresponds in principle to the construction shown in Figure 3. The counter-tensioning device 70 consists in this embodiment only of the designed as a relatively narrow coil winch 72. This is arranged on the side of the roller blinds, that the Gegenzugseil 6A runs without further cable deflection directly to the fixed point 6x on the cable coupling 60.

In the case of the spring-elastically coupled counter pull device 70 considered here, the electric motor M - or another suitable roller blind drive - can in principle be coupled either rotationally fixed to the take-up shaft 13 or to the winch 72. The advantages and disadvantages of the two options, however, depend on the installation position of the roller blind. For example, in the installation position upside down, in which the end strip 22 moves upwards during unwinding, the rotationally fixed coupling to the winch 72 is obviously advantageous. On the other hand, the mounting position is usually unpredictable or indefinite, such as a movable roof window.

In order to create an optimal drive for all mounting positions, a two-way clutch 90 is provided, which rotatably couples or disengages the electric motor M either to the spur gear 80 or to the winch 72 depending on the direction of rotation. A rotational force in the winding direction, for example, in the mounting position upside down.

For the design of such a two-way clutch 90, several solutions are suitable. In a preferred embodiment, the two-way clutch according to the illustration in Figure 6 with the electric motor M rotatably connected input shaft 93, a first and a second output shaft 91 and 92, a linkage 94 and a movable coupling member 95 with coupling claws 96 to the first and second output shaft 92 and 93, respectively. The connecting gear 94 is meshed with the input shaft 93 such that this depending on the direction of the rotational force performs a limited left or right rotation relative to the input shaft 93 and this translates into an axial movement of the coupling member 95. This axial movement closes or opens the clutch claws 96 so that the clutch member 95 produces a rotationally fixed connection between the input shaft 93 to either the first or second output shafts 91 and 92, respectively.

FIG. 7 shows a roller blind foil 2 spread out to the surface with a closing strip 22 arranged at the foot end and with a wedge-shaped gate 2V at the head end. The wedge tip is fixed to the receiving shaft 13, for example by gluing. By the wedge-shaped gate 2V, the inner layers form a tubular winding core around the take-up shaft 13, which is mainly stored in the middle with a fairly stiff thickening and the receiving shaft 13 wrapped relatively loosely to the sides. This winding core formed by additional inner layers is particularly advantageous in combination with the cable system, because this aligns the surface of the extended part of the roller film 2 perpendicular to the axis of rotation of the take-up shaft 13, so that a true-to-lug winding over many revolutions is ensured with a small diameter. Another advantage is that the flexible winding core distributes the tension acting on the roller blind film 2 evenly across the width.

8 shows a cross-section of the roller blind in an insulating glass with two glass panes 10, 10 ', which are connected by circumferential spacers 11 gas-tight.

The roller blind in the disc space has a depth of about 20mm, which is essentially determined by the film winding 20. As a result, the thinnest possible roller blind film is advantageous. Suitable, for example, is a 25μ thick polyester film laminated with aluminum, which is also stiffened by embossing. In the illustration, a roller blind foil with creases 2X is shown by way of example, which form a wave profile in the foil surface 21. This advantageously stabilizes the film surface 21 and at the same time enhances the appearance.

Furthermore, a middle cable 5M and a cable guide 55 are shown in FIG. 8, which belong to a cable pull system according to the embodiment shown in FIG. 4 or FIG. The illustration shows how the central cable 5M supports the film surface 21 against sagging, for example in an inclined mounting position such as roof glazing. In combination with a 2X stiffened by creases roller blinds, it is even possible to slide the film surface 21 at a distance from the lower glass 10 and thus without friction.

Finally, Fig.8 shows a special roller blind drive with magnetic coupling 24. Shown is a preferred embodiment in which the magnetic coupling 24 transmits a displacement force through one of the glass panes 10 on the end strip 22. In this way, the blind in the insulating glass manually - as shown by the double arrow - are operated by moving the magnetic coupling 24. In another embodiment, for example, a magnetic coupling is arranged on the head side, which transmits a rotational force through one of the glass sheets 10, 10 'or the spacer 11 to the take-up shaft 13 or another suitable shaft.

LIST OF REFERENCE NUMBERS

10.10 '

pane

11

Spacer of insulating glass

12

Cross strut on the head side

13

up shaft

14.14 '

Overrunning clutch to take-up shaft

2

Film for blinds

20

Rollo winding

21

Roller blind area, unwrapped roller blind foil

22

end strip

23

operating handle

24

Magnetic Coupling

2V

Cut, wedge-shaped

2X

kink embossing

3A, 3B

Circulating rope, on side A, B of the roller blind

31,32,33,34

Rope deflection, on foot side

35.36

first rope deflection, on head-side

2a, 2a ', 2b'

Fixed point of rope ends A, B

4A, 4B

Retaining rope, on side A, B

41,42,43,44

Rope deflection on end strip

4a, 4b, 4c, 4d

Fixed point of rope ends A, B

5A, 5B

Side rope, on side A, B

51, 52

Rope deflection, on side A

53, 54

on page B

5 M

Means rope

55, 56

Rope deflection, on crossbar 12

2m

Fixed point, on end bar 22

6A

Return rope

61, 62

Rope deflection, on head-side

60

cable clutch

6x

Fixed point on cable coupling, detachable

63

guide channel

64

Opening in the profile of the guide channel

65

U-profile, on the side edge of the roller blind foil

70

counterpull

71

Winch as a cone with rope guide

72

Winch as a coil

S

Travel, on the cone of the winch 71

80

coupling member

81

tendon

90

Two-way clutch consisting of:

93

input shaft

91, 92

Output shaft. first second

94

connecting gear

95

Coupling link, movable

96

coupling claw

M

Roller blind, electric

terms

Rollo frame:

Page A, page B
Head-side, foot-side

Film for blinds:

Headboard, foot end
margin

Insulating glass:

Glass pane 10,10 '
Spacer 11

Claims (21)

Roller blind with cable system for temporarily covering a flat surface such as window pane,
with a roll-up and roll-up film (2) with head and foot,
with a rotatable receiving shaft (13) arranged at the head end for winding and unwinding the roller blind film (2),
with a arranged on the movable foot end and connected to this end strip (22),
characterized,
in that the terminating strip (22) is guided by a cable pull system at a fixed angle to the axis of rotation of the take-up shaft (13) in such a way that the winding up of the part of the roller blind foil (2) which extends to the roller blind surface (21) is perpendicular to the axis of rotation of the take-up shaft ( 13) takes place. Roller blind according to claim 1,
characterized in that
that the cable system is designed as unsprung, rigid connection. Roller blind according to one of the preceding claims,
characterized in that
the roller blind foil (2) has a wedge-shaped blank (2V) at the head end, the tip of which being fixed to the receiving shaft (13). Roller blind according to one of the preceding claims,
characterized in that
the roller blind film (2) parallel to the receiving shaft (13) extending crease embossments (2X) has such that the roller blind surface (21) forms a wave profile or a zig-zag profile. Roller blind according to one of the preceding claims,
characterized in that
the roller blind foil (2) has a thickness of 10 to 50 μm. Roller blind according to one of the preceding claims,
characterized in that
the cable system has two holding cables (4A, 4B) and cable deflections (41, 42, 43, 44) arranged on the end strip (22),
wherein the two retaining ropes (4A and 4B) with their respective first end at a first fixed point (4a or 4b) on the foot side and with the second end at a second fixed point (4c and 4d) on the head Side of the blinds are fixed, and
wherein the tethers (4A, 4B) with respect to the sides A and B of the roller blind have the following preferably symmetrical course: 1. From the first fixed point (4a or 4b) on side A or side B along this side of the roller blind to the end strip (22); 2. To a first cable deflection (41 or 44) and further along the end strip (22) to a second cable deflection (42 or 43), which is arranged either in the central region or at the end of the other side B or A. ; 3. To a second cable deflection (42 or 43) and further in the direction of curl to the second fixed point (4c and 4d). Roller blind according to one of claims 1 to 5,
characterized in that
the cable system comprises two movable circulating ropes (3A, 3B) and cable deflectors (31, 32, 33, 34 and 35, 36) arranged on the foot side and head side of the roller blind, the two circulating ropes (3A , 3B) are fixed with their respective first and second end to laterally arranged on the end strip (22) fixed points (2a and 2b), and
wherein the circulating ropes (3A, 3B) have the following symmetrical course with respect to the sides A and B of the roller blind: 1. From the side A or side B facing fixed point (2a or 2b) on the end strip (22) along the side A and side B to the head-side of the roller blind; 2. To a first rope deflection (35 or 36) and further in the opposite direction along the side A and side B to the foot of the roller blind; 3. To a second rope deflection (31 or 33) and further along the foot side to the opposite side B or side A; 4. To a third rope deflection (32 or 34) and further along the side B or side A in the direction of the head-side to the corresponding fixed point (2b and 2a) on the end strip (22). Roller blind according to claim 7,
characterized in that
on the side A or side B or on both sides A and B of the roller blind, the respective first cable deflection (35 or 36) is formed as a pulley with drive shaft, and
in that the drive shaft is coupled to the take-up shaft (13) by means of an overrunning clutch (14 or 14 ') engaging in the take-up direction. Roller blind according to claim 7 or 8,
characterized in that
on the side A and the side B of the roller blind pulleys (35 and 36) are arranged with different sizes of diameter by means of a respective one-way clutch (14 or 14 '). Roller blind according to one of claims 1 to 5,
characterized in that
the cable system comprises a cable coupling (60), two lateral cables (5A, 5B) and cable deflectors (52, 53, 54) arranged on the foot side of the roller blind, the two lateral cables (5A, 5B) each having a End of fixed points (2a, 2b) are laterally fixed to the end strip (22) and with the other to the cable coupling (60), and wherein the side ropes (5A, 5B) with respect to the sides A and B of the blinds preferably following have asymmetric course: First side rope (5A): 1. From the side A facing fixed point (2a) on the end strip (22) along the side A. to the foot-side of the roller blind; 2. To a rope deflection (52) and further in the opposite direction; 3. Fixation on the cable coupling (60). Second side rope (5B): 4. From the side B facing fixed point (2b) on the end strip (22) along the side B to the foot side of the roller blind; 5. To a first cable guide (53) and further along the foot-side to the opposite side A of the roller blind; 6. To a second cable guide (54) and further along the side A in the direction of the head-side; 7. Fixation on the cable coupling (60). Roller blind according to claim 10,
characterized in that
the two side ropes (5A, 5B) are approximately the same length, the first side rope (5A) preferably having the following course: 1. From one of the side B of the blinds facing fixed point (2a ') at the lateral end of the end strip (22) along the same to the other side A facing the end; 2. To a first cable guide (51) and further along the side A to the foot-side of the roller blind; 3. To a second cable guide (52) and further in the opposite direction; 4. Fixation on the cable coupling (60). Roller blind according to claim 10 or 11,
characterized in that
the cable system has a central cable (5M) fixed to the end strip (22) and having the following asymmetrical profile with respect to the sides A and B of the roller blind: 1. From a fixed point (2m) in the middle of the end strip (22) towards the head-side of the roller blind; 2. To a rope deflection (55) and further parallel to the head side in the direction of the side A; 3. To a rope deflection (56) and further towards the foot-side along the side A; 4. Fixation on the cable coupling (60). Roller blind according to one of the preceding claims,
characterized in that
a Gegenzugeinrichtung (70) acting in the direction of unwinding on the end strip (22) is provided, which acts either directly on the end strip (22) or on a coupling point of the cable system by means of a cable coupling (60) to a Gegenzugkraft on the end strip (22) transferred to. Roller blind according to claim 13,
characterized in that
the retraction device (70) comprises a retraction cable (6A) and a winch (71 or 72), the retraction cable (6A) winding up and down on the cable winch (71 or 72). Roller blind according to one of claims 13 or 14,
characterized in that
the return cable (6A) is fixed to the cable coupling (60) by means of a preferably detachable connection (6x). Roller blind according to one of the preceding claims,
characterized in that
that on one side of the roller blind a guide channel (63) for guiding the cable coupling (60) along a linear path is arranged such that the cable coupling (60) is secured in a plane by positive engagement against rotation about the longitudinal axis. Roller blind according to one of the preceding claims,
characterized in that
the roller blind has a coupling element (80) arranged between the take-up shaft (13) and the counter-pulling device (70) for transmitting a rotational force and for synchronizing the rotational movements. Roller blind according to claim 17,
characterized in that
the coupling member (80) has a torsionally flexible clamping member (81) such as torsion spring, mainspring or a similar spring element in the power flow between the receiving shaft (13) and counter-pulling device (70). Roller blind according to one of the preceding claims,
characterized in that
a roller blind drive (M) and a two-way clutch (90) is associated with the coupling member (80) such that the two-way clutch (90) depending on the direction of rotation of the roller blind drive (M) either to the drive train of the take-up shaft (13) or the Gegenzugeinrichtung (70) rotatably coupled or uncouples. Roller blind according to claim 19,
characterized in that
the two-way clutch (90) has an input shaft (93), first and second output shafts (91, 92), a linkage gear (94) and a movable clutch member (95) with clutch claws (96) to the first and second output shafts (91, 92 ), wherein the linkage gear (94) translates a limited left or right turn relative to the input shaft (93) into a movement of the coupling member (94) to open or close the clutch claws (96) to either connect the input shaft (93) to the first one or coupled to the second output shaft (91, 92) rotatably or uncouple. Roller blind according to one of the preceding claims,
characterized in that
the blind between glass panes (10, 10 ') is arranged in an insulating glass with hermetically sealed spacer (11) and a magnetic coupling (24) for transmitting a driving force through one of the two glass panes (10) or through the spacer (11) for actuating the Has blinds.

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