EP1525368B1 - Roller blind device - Google Patents

Abstract

A roller blind device including a fabric, which can be wound on a rotationally drivable fabric shaft that is mounted on a frame, and including a pull rod that is placed on the free edge of the fabric. Prior art roller blind devices reduce the window surface area. The aim of the invention is to further develop a prior art roller blind device in order to obtain a simple, inexpensive and compact design that reduces the incidence of light only minimally. To this end, the invention provides that a cord reel is connected to the fabric shaft in a rotationally fixed manner while being coaxial to said fabric shaft and located in the extension thereof, and the free end of the cord that can be wound on the reel is connected to the pull rod via a cord diverter. When the fabric is pulled from the fabric shaft, the cord is wound on the cord reel and vice versa. A spring device is provided over the course of the cord in order to adapt the cord to the varying winding state of the fabric shaft and cord reel.

Description

The invention relates to a roller blind device according to the preamble of claim 1 and an equipped with such a roller blind device insulating glass and a appropriately equipped window.

The simplest such roller blind devices are, for example, the known Ferderzug- or Snap blinds. In these devices, a torsion spring is arranged in the cloth shaft and a latching mechanism for different Abrollstufen the cloth provided. These blinds require a considerable amount of effort to operate and often grab unintentionally upwards. Furthermore, roller blinds with tensioning cable devices are known. This is the rope rolled up on a second shaft. In the cable shaft is a torsion spring and the Cable shaft is driven. These devices require a lot of effort and load the components heavily.

Generic roller blind devices are also the subject of EP 0 483 528 A1 and the WO 01/53647 A1 and GB 2 166 480 A. Similar devices are also in the EP 0 154 218 A2, EP 0 795 674 A2 and DE 4 342 977 A1 and DE 197 37 632 disclosed. These writings describe roller blinds with one on one rotatably drivable, mounted on a frame cloth shaft windable cloth, wherein at the free edge of the cloth a pull rod is arranged on the in the withdrawal direction of the cloth a force acts. In the writings mentioned this force is either manual or generated by electric motor, with different deflections acting on the tension rod Pull ropes are provided.

A disadvantage of the known solutions are the design-related considerable Mounting dimensions. An installation in commercial double-glazed windows with 16 mm glass spacing is included Although these devices possible, but you lose a significant portion of original window surface, whereby the light is reduced, as a significant Frame width is necessary to cover the functionally important parts. Furthermore one requires, also type of construction, a considerable engine power with appropriate Electricity consumption and corresponding waste heat as well as large structural dimensions.

Finally, these devices have a very complex mechanics and control, require many components and are therefore expensive, complicated and expensive in the Production.

Finally, from the documents DE 38 36 595 A1 and DE 9001090 U of the applicant Windows or devices for darkening windows known in which several Rollers are geared together and on each roller one only part of the roller Window covering darkening is windable. These devices work with flexible rubber cables or springs in the pulling device. The disadvantage here is that a Rubber cable is a critical component because the rubber becomes brittle after some time and tears. In the spring arrangement, the guide is problematic around a bend.

DE 92 15 788 U1 and DE 87 03 605 U1 each show a counter roller blind trained roller blind device with a on a drehantreibbare on a frame stored cloth shaft windable cloth and one at the free edge of the cloth arranged tension rod, acts on the force in the withdrawal direction of the cloth, wherein coaxial and in extension of the cloth shaft on each side of the cloth shaft in each case a cable reel rotatably connected to the roller tube and the free end of the rope wound thereon via a respective cable deflection is connected to the tension rod, whereby at Peel off the cloth from the cloth shaft, wind up the rope on the rope reels and vice versa. In the course of the rope or ropes is at least one spring arrangement for Adjusting the length of the rope to the varying winding state of the fabric shaft and Rope coils provided, which can be arranged within the tension rod.

Furthermore, DE 296 09 604 U1 shows an intended for installation in an insulating window Roller blind device with a laterally arranged pulley and counterweight instead of feathers.

A disadvantage of these writings is that two cable coils are used and at different winding diameters left and right no straight guide of the cloth or the tension rod is more possible. Furthermore, only one coil spring for both ropes provided, which greatly limits the travel. With the arrangements described are to cover only wide, but not very high windows (for example with car windows). For long and narrow slices, z. B. for patio doors or roof windows are these Not orders. Since the length of the usable spring travel through the width of the Entire device is limited, is when using only one spring only one according to short travel available. But this is a sufficient balance of different winding diameter of roller tube and pulleys, with correspondingly high Windows not possible. The tension rods described in the publications also allow not the introduction of two springs with adding spring paths.

It is therefore an object to further develop a generic roller blind device so that achieves a compact design, the light incidence through the window only minimally reduced and high and narrow windows can be provided with the device. Furthermore, the object is a equipped with such a roller blind device To provide insulating glass pane and a corresponding window. These are solved Tasks by the characterizing features of claim 1 and by the features of claims 4 and 5.

Figur 1:

Eine Rollovorrichtung innerhalb eines Trägerrahmens;

Figur 2:

Einen teilweisen Schnitt der in Figur 1 dargestellten Rollovonichtung innerhalb des Trägerrahmens;

Figur 3:

Eine Darstellung gemäß Figur 2, jedoch ohne Rahmenelemente;

Figur 4:

Eine vergrößerte Darstellung des Wickelbereiches der in Figur 3 dargestellten Rollovorrichtung;

Figur 5:

Eine Darstellung gemäß Figur 4, jedoch ohne das zu wickelnde Tuch;

Figur 6:

Eine Querschnittdarstellung durch die Anordnung gemäß Figur 4, welches sowohl die Führung des Tuches 6 als auch die des Zugseils 15, 16 zeigt;

Figur 7:

Eine schematische Frontalansicht der Rollovorrichtung in den drei Wickelzuständen

(a) aufgerolltes Tuch

(b) halbaufgerolltes Tuch

(c) abgerolltes Tuch;

Figur 8:

Ein rahmenverbindendes Teil für den Rahmen gemäß Figur 1 bis 3;

Figur 9:

Ein weiteres rahmenverbindendes Teil für den Rahmen gemäß Figuren 1 bis 3;

Figur 10:

Das Verbindungselement der Fallstabprofile, welches gleichzeitig als Seilumlenkung dient;

Figur 11:

Die Halterung für den Motor der Rollovorrichtung;

Figur 12:

Eine Variante des Ausführungsbeispiels gemäß Figur 7, wobei anstelle von Druckfedern Zugfedern verwendet werden;

Some embodiments of the invention will be described in more detail below with reference to the accompanying drawings. Show it:

FIG. 1:

A roller blind device within a support frame;

FIG. 2:

A partial section of the Rollovonichtung shown in Figure 1 within the support frame;

FIG. 3:

A representation according to Figure 2, but without frame elements;

FIG. 4:

An enlarged view of the winding area of the roller blind device shown in Figure 3;

FIG. 5:

A representation according to Figure 4, but without the cloth to be wound;

FIG. 6:

A cross-sectional view through the arrangement of Figure 4, which shows both the guidance of the cloth 6 and that of the pull cable 15, 16;

FIG. 7:

A schematic frontal view of the roller blind device in the three winding states

(a) rolled up cloth

(b) half-rolled cloth

(c) unrolled cloth;

FIG. 8:

A frame connecting part for the frame according to Figure 1 to 3;

FIG. 9:

Another frame connecting part for the frame according to figures 1 to 3;

FIG. 10:

The connecting element of Fallstabprofile, which also serves as a cable guide;

FIG. 11:

The holder for the motor of the roller blind device;

FIG. 12:

A variant of the embodiment of Figure 7, wherein instead of compression springs tension springs are used;

Figure 1 illustrates a frame 2, in which a roller blind device according to the invention is integrated. The frame 2 consists of a lower frame part 4 and an upper one Frame part 5. Also recognizable is a guide slot 3. The frame 2 is made preferably made of sheet metal or plastic profiles, which are shaped so that they after the Assembly enclosing the mechanics detailed below. At the Inside the frame 2 remains the guide slot 3, in which the cloth and the Move tension rod guided.

Figure 2 shows the arrangement shown in Figure 1 without the upper frame part 5, whereby a Part of the mechanics becomes visible. The darkening cloth 6 is on a Cloth shaft wound and deflected once over a deflection shaft 8. With the cloth wave are a cable spool 9 and a bevel gear 10 rotatably connected. The cloth shaft is in Clip holder 11, which simultaneously hold the frame parts 4 and 5, clipped. With the Cloth end is connected to a pull rod 12. The details of the tension bar 12, the two-part is formed, are best seen in Figure 5. The tension rod 12 consists of two parallel bars wrapped by the cloth 6 and between which the cloth 6 is trapped. The tension rod 12 is hollow inside and can thus the pull rope and Take up springs, which will be discussed below. In both ends of the Tension rod are Seilumlenlcteile 13 inserted, which is also best seen in Figure 5 is. The Seilumlenlaeile 13 are also shown in Figure 10 in detail. From this Representation can be seen that the Seilumlenkteile 13 not only the introduction of the pull rope serve in the tie rod, but also the connection of the two separate and parallel Guided rods of the pull rod by joint insertion of both Seilumlenkteile 13 in the respective, juxtaposed ends of the two parts of the tension rod 12. In addition is about the formation of the tie rod 12 and the wrapped cloth 6 is a U-shaped Slipped profile, which can be seen in Figure 6. This stabilizes the structure and prevents it the Zugstabeinheit can tip over at low spring tension. Further are frame connecting parts 14 provided at the corners of the frame 2, which at the same time as Deflection parts serve for the traction cables 15 and 16, which are deflected around the coils 17 so be that they are guided by the tie rod 12 to the cable coil 9. As drive serves a Electric gear motor 18, which rotates the roller tube by means of a bevel gear 19. Of the Motor 18 is by means of the motor mount 20, which is shown in detail in Figure 11, with connected to the lower frame part 4.

The entire arrangement is for clarity without the lower frame part 4 in Figure 3 shown again while Figure 4 is an enlarged view of the winding area from Figure 3 shows. Therein, in particular, the cable spool 9 and the connecting element 13th to recognize more clearly, as well as the storage of the cable coil 9 and their co-linear connection with the cloth shaft 7.

The fabric shaft 7 itself is best seen in Figure 5, which is a representation according to Figure 4, but without the cloth to be wound 6 shows. Incidentally, the description of the Figure 5 to the description of Figures 2-4 reference. Especially shown in Figures 4 and 5 are also the clip holder 11 for receiving the Cloth shaft 7.

Figure 6 shows a cross-sectional view of Figure 4, wherein both the leadership of the cloth 6 and the guide of the pull cable 15 and 16 are shown. The location of the cross section is not chosen in a particular place for the sake of clarity. Figure 6 is to see that the cloth 6 is wound on the fabric shaft 7 and a Guide shaft 8 down (in Figure 6 to the right) is deflected. Further, Figure 6 shows the Cable reel 9, on which the pull cable 15, 16 is wound up. Finally, Figure 6 shows the Tension rod 12, consisting of two cylindrical tubes, which are parallel to each other, and around which the cloth 6 is wound in the form of an "8" and between which it is clamped is. The cohesion of the two components (cylindrical sleeves) of the tension rod 9 is by the components already described and shown in Figure 10 for cable deflection or tie rod connection causes. As previously described, is about the cylindrical Components of the tie rod and the wrapped cloth a U-shaped profile inverted and thus preventing a tipping over of the tension rod. FIG. 6 shows that the effect the cloth deflection shaft 8 is that the cloth 6 is always on the same plane.

Reference has already been made to FIGS. 8-11 in the description of FIGS. 1-6. These show details of the arrangement in an enlarged view. In particular, FIG. 8 shows the frame connecting part 11, which both the illustrated fabric shaft 7 and the deflection shaft 8, not shown, receives in claws provided for this purpose by clipping. Figure 8 shows the frame connecting part 11 once without and once with clipped Cloth shaft 7 and cable coil 9. Figure 9 shows the further frame-connecting part 14 also in two representations with the coils 17, wherein the coil 17 in a representation half pulled out. The coils 17 serve as described the rope deflection. The frame connecting parts 14 for mounting in the lower left and the lower right Corner of the frame are mirror-symmetrical and each have two holes 23, in which the coils 17 are inserted. By repositioning the coil 17 in the one or other hole the blind device can be created with left or right drive.

In Figure 10, the connecting element 13 for the two components of the tension rod 12 in Detail shown. The pins located on each connecting element 13 engage in the Insides of the ends of the elements of the tie rod and connect both Components are frictionally engaged. As a result, it is also ensured that the cloth 6 between the two elements of the tension rod 12 is clamped. The connecting elements 13 serve but also for deflecting the ropes 15, 16 into the interior of the tension rod 12, wherein the Rope is guided through the holes 25.

FIG. 11 shows the holder 20 for the motor 18 in detail. This holder 20 consists of a "shoe" which is connected to the lower frame part 4 and in which the motor 18th can be inserted accurately. About the engine body of the clamping bracket 27 is placed and clamped and locked by means of screws 28. This allows the motor 18 by loosening the screws 28 as required shifted on its longitudinal side and the bevel gears can be exactly engaged with each other.

The function of a first embodiment of the invention is best seen in the three Partial figures of Figure 7 recognizable. These show schematic frontal views of Roller blind device in three winding states. Partial figure (a) shows the condition at full rolled-up cloth 6, part figure (b) with half rolled up or half unrolled cloth 6 and Part figure (c) shows the state with completely unrolled cloth 6. The same Representation applies to the other embodiments described below become. In Figure 7 and the following figures, the operation is without the cloth. 6 and the drop bar 12. The drop rod 12 is located between each shown rope deflections 13.

In Figure 7, the traction cables 15 and 16 through the deflecting parts 13 and springs 21 and 22, which are in the two parts of the tension rod 12 are passed. At the ends Each traction cable 15 and 16 is a thickening 23, with which the respective Traction cable 15 and 16 against the end of the respective spring 21 and 22 is supported and the traction cable can not be pulled through the spring. The springs 21 and 22 are under Preload, so under pressure. When the roller blind now opens or closes, it opens up a middle state, as indicated in sub-figure (b), permanently a different one Quantity cloth 6 or rope 15, 16 wound up or down, since with increasing settlement of the Tuches (from (a) to (c)), the outer diameter of the fabric shaft 7 decreases during at the same time the outer diameter of the cable shaft 9 through the wound ropes 15 and 16 increases. In part figure (b) it is shown that the outer diameter of the fabric shaft 7 is the same the outer diameter of the cable shaft 9 is. In this transition state, the springs 21st and 22 maximally stretched, since here the maximum free length of the ropes 15 and 16 is present. At the further transition from sub-figure (b) to the sub-figure (c), the springs 21 and 22 by the increasing outer diameter of the cable spool 9 and the further decreasing Outer diameter of the fabric shaft 7 in turn compressed. By the springs 21 and 22 is the entire arrangement thus able, the respective different winding condition compensate for the fabric shaft 7 and cable shaft 9 without the traction cables 15 and 16 to very tense or sagging. This allows the device in a be attached to any angle of inclination, z. B. in Dachflächemfenstern, as always one uniform tension of cloth 6 and ropes 15 and 16 is present.

FIG. 12 shows in its subfigures (a), (b) and (c) a similar embodiment as FIG 7, but instead of compression springs tension springs are used. In contrast to Use of compression springs must here in addition connections between the Extension springs 21 and 22 and the cable guide 13 are provided to the springs 21 and 22 hold. In contrast to the embodiment of Figure 7, the springs in the Middle position (b) to minimum length while in the end positions (a) and (c) on maximum length are.

In a particular embodiment of the invention, with all described Embodiments is possible, can be described with the roller blind device corresponding profiled frame, as shown in Figure 1, as a substitute for the use so-called glazing beads. The glazing beads of a window are those strips that hold the glass in the frame. These glazing beads can removed and replaced by a roller blind device or its frame according to the invention be achieved, which one low installation depth and height and also a maximum incidence of light.

Similarly, the glass strip can be replaced by an angle profile that is shaped so that it picks up the standard frame of the roller blind device described by clipping.

Since the device has a self-supporting frame, it can also as independent roller blind, by clamping or screwing, be mounted in the window rebate.

Claims (5)

1. Roller blind device with a blind fabric which can be wound onto a blind fabric shaft (7) which can be driven rotationally and is mounted on a frame (4, 5) and with a drawing bar (12) which is arranged on the free edge of the blind fabric and on which a force acts in the drawing direction of the blind fabric, wherein a cable spool (9) is connected in a rotationally fixed manner to the blind fabric shaft (7) coaxially and in the extension of the blind fabric shaft (7) and the free ends of each cable which can be wound onto it are connected to the hollow drawing bar (12) over at least one cable end pulley (17) so that when the blind fabric is pulled off the blind fabric shaft (7) the cable is wound onto the cable spool (9) and vice versa, and at least one spring arrangement is provided in the course of the cable and within the drawing bar (12) for adjusting the length of the cable to the varying state of winding of the blind fabric shaft (7) and cable spool (9), characterised in that two cables (15, 16) can be wound on the single cable spool (9), whereby the free end of one cable is run to one end of the drawing bar (12) and the free end of the other cable is run to the other end of the drawing bar (12) and the or each spring arrangement is embodied as a coil spring (21, 22), each cable (15, 16) is provided with its own coil spring (21, 22), the coil springs are supported on cable end pulleys (13) at the inner opposite ends of the drawing bar (12), and the drawing bar (12) exhibits two cylindrical bar parts which run parallel to one another, each bar part receiving one of the two coil springs (21, 22).
2. Roller blind device according to claim 1, characterised in that the two cables are introduced laterally into the drawing bar (12), are guided inside the drawing bar (12) through the two coil springs (21, 22) which are arranged therein and preloaded under pressure and at their free ends exhibit thicker zones (23) the extent of which at least corresponds to the diameter of the coil springs (21, 22) or are connected to these.
3. Roller blind device according to claim 1, characterised in that the two cables (15, 16) are introduced laterally into the drawing bar (12) and are each fastened inside the drawing bar (12) to the end of a coil spring which is preloaded under tension and only associated with one cable (15 or 16) and the other end of which is fastened to the drawing bar (12).
4. Insulating glass panel with two panes of glass and an internal space located between them, characterised in that a roller blind device according to one of the preceding claims is arranged in the internal space.
5. Window with a frame and at least one pane of glass fixed in the frame by means of glass retaining strips and with a roller blind device according to one of claims 1 to 3, characterised in that in place of at least one glass retaining strip the housing of the roller blind device or an angle profile associated with this housing fixes the pane of glass.

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