EP0684361A1 - Lifting and pivoting mechanism for lamellar blinds - Google Patents

Abstract

The draw and swivel device comprises at least two turning elements in the form of rocker discs (6,7) which are mounted on a common draw-up shaft (2). The turning area is restricted by end stops. A common locking slider (14) forms the intermediate stops. The ends (10-13) of the swivel members of an upper and lower blind area are attached to the rocker discs. By turning the discs the swivel members are raised on one side and lowered on the other causing swivel movement of all of the slats connected to the swivel members. The end stops for the two turning elements are arranged so that in one end position all slats of both areas are in the closed position and in the other end position all slats are in the fully opened positioned. The intermediate stop is arranged so that when the turning elements stop the slats of the upper blind are opened and the slats of the lower blind are partially closed. <IMAGE>

Description

The present invention relates to a gathering and swiveling device for slat blinds with a winding shaft, which has a bobbin for an elevator element of the slat blind curtain and a turning element that can be rotated on the winding shaft, on which the two ends of pivoting elements for the slats are fixed, and the one between the winding shaft and the turning element friction clutch and two end stops to limit the turning range of the turning element, respectively. of the slats and an intermediate stop arranged between them and actuated by the elevator element, the stop action of which is canceled when the slatted blind curtain is completely lowered.

Such a device is known for example from DE 32 05 491. Such a device allows the slats of the slatted curtain to be fixed in an open, a closed position and an intermediate position by a single actuating operation for the gathering of the slatted curtain, which acts on the elevator axis. This is achieved by means of a turning element which is arranged on the elevator axis and is frictionally connected to it between stops. A locking slide is provided for the intermediate stop, which is controlled via an actuating element.

The object of the present invention was to improve such a known device for gathering and swiveling slat blinds to the effect that it can be used for a blind curtain with slat areas to be set differently.

This object is achieved according to the characterizing part of claim 1. This can be advantageously both for the Raffwie while maintaining a single control element also for the pivoting process, several slat regions provided with mutually independent slat orientations are pivoted and raised or raised in defined positions. be lowered.

According to claim 2, two swivel members are preferably provided for a two-part slat curtain. Such slatted curtains are particularly well suited for shading workplaces equipped with screens. The lower half of the curtain should prevent direct exposure to the sun, for which the slats in this area are at least partially closed, and the upper half of the curtain should shine as much light as possible in the upper area of the work place to enable the best possible natural lighting, for which the slats in this area are aligned in an almost fully open position. According to the invention, these slat positions are automatically created when the curtain is lowered. When the slatted curtain is completely lowered, the slats of all curtain areas can be swiveled over the entire intended swivel range with the single control element.

Further preferred embodiments of the invention are set out in claims 3 to 8.

• Fig. 1 schematisch den Schnitt durch eine erfindungsgemässe Vorrichtung bei teilweise abgesenktem Lamellenstoren;
• Fig. 2 schematisch den Schnitt nach Figur 1 bei vollständig abgesenktem Lamellenstoren;
• Fig. 3 schematisch die Lamellenstellungen der beiden Lamellenstorenbereiche in Aufziehstellung;
• Fig. 4 die Darstellung nach Fig. 3 in Absenkstellung (Zwischenstellung);
• Fig. 5 die Darstellung nach Fig. 3 in Schwenkstellung (Vollständig abgesenkt);

In das Gehäuse 1 der erfindungsgemässen Raff- und Schwenkvorrichtung ist die Aufziehwelle 2 des Lamellenstorens eingesteckt, wie aus Figur 1 ersichtlich. Diese Aufziehwelle 2 kann beispielsweise eine kantige Form oder eine Rundform mit Nut und Feder aufweisen. Im Gehäuse 1 ist ein Zylinderkörper 3 gelagert, welcher den Spulenkörper 4 für das Aufzugsband 5 des Lamellenstorens umfasst. Der Zylinderkörper 3 kann selbstverständlich auch mehrteilig aufgebaut sein. Die Aufziehwelle 2 ist verdrehfest mit dem Zylinderkörper 3 verbunden, beispielsweise durch eine Nuten-Federverbindung oder rein Formschlüssig mittels kantigem Querschnitt. Durch Verdrehen der Aufziehwelle 2 mittels eines Betätigungsorgans, beispielsweise einer Kurbel oder eines Motors (nicht dargestellt), wird das Aufzugsband 5 auf den Spulenkörper 4 aufgewickelt resp. abgewickelt und damit der Lamellenstoren angehoben resp. abgesenkt.An embodiment of the present invention is explained in more detail below with reference to drawings. Show it:

• Figure 1 shows schematically the section through an inventive device with partially lowered slat blinds.
• 2 shows schematically the section according to FIG. 1 with the slat blind completely lowered;
• 3 schematically shows the slat positions of the two slat blind areas in the open position;
• Fig. 4 shows the representation of Figure 3 in the lowered position (intermediate position).
• FIG. 5 shows the representation according to FIG. 3 in the pivoted position (completely lowered);

The pull-up shaft 2 of the slat blind is inserted into the housing 1 of the gathering and pivoting device according to the invention, as can be seen from FIG. This winding shaft 2 can for example have an angular shape or a round shape with tongue and groove. In the housing 1, a cylinder body 3 is mounted, which comprises the bobbin 4 for the winding belt 5 of the slat blind. The cylinder body 3 can of course also be constructed in several parts. The winding shaft 2 is non-rotatably connected to the cylinder body 3, for example by means of a tongue and groove connection or purely positively by means of an angular cross section. By rotating the winding shaft 2 by means of an actuating member, for example a crank or a motor (not shown), the winding band 5 is wound onto the bobbin 4. handled and thus the slat blind raised or. lowered.

On the cylinder body 3, two turning elements in the form of rocker disks 6, 7 are rotatably attached. The rocker disks 6,7 are frictionally connected to the cylinder body 3 by means of coil springs 8,9. As long as the bent spring ends 8 ', 8''respectively. 9 ', 9''of the coil springs 8.9 cannot be brought to a stop, the two rocker disks 6,7 are moved together with the cylinder body. As soon as the spring ends 8 ', 8''respectively. 9 ', 9''come to a corresponding stop, the frictional engagement is loosened and the rocker disks 6 respectively. 7 remain in the corresponding position. On the rocker disks 6.7, the ends 10.11, respectively. 12, 13 of the swivel members of an upper and lower slat blind area. Due to the rotary movement of the rocker disks 6,7, these become. Swivel members pulled up on one slat curtain side and lowered on the other slat curtain side, which leads to a pivoting movement of all the slats of the slat curtain connected to the swivel members. The size of the swivel movement, ie the swivel range, is determined by the arrangement of the abovementioned stops.

When lowering or when opening the lamella curtain by the aforementioned actuator, the rocker disks 6 and 7 are always moved in the corresponding direction up to the respective stop. The end stops for the rocker disks 6, 7 are generally positioned in such a way that the slatted curtain can be brought into both the fully closed and the fully open position. So that the slats can be brought into a predetermined position when the blind curtain is lowered, it is known in such devices to provide an additional intermediate stop which can be brought from the stop position into a rest position.

In Figure 1, the intermediate stop proposed according to the invention, designed as a slide 14 with compression spring 15, is shown in the stop position. The coil spring ends 8 'and 9' come to a stop against the slide 14. In order to move the slide 14 into its rest position shown in FIG. 2, a radially displaceable cam body 16 is provided in the coil body 4. This cam body 16 is pressed by the elevator belt 5 against a spring 17 against the winding shaft 2 when the lamella curtain is pulled up. When the winding belt 5 is completely unwound from the coil body 4 when the lamella curtain is lowered, the cam body 16 is displaced radially outwards by the force of the spring 17 and presses the slide 14 against the spring 15 parallel to Wind-up shaft 2, such that the openings 14 'are positioned in the range of rotation of the spring ends 8' and 9 ', as shown in FIG. 2. The two rocker disks 6 and 7 can thus be rotated further until the corresponding end stop. This makes it possible, with the slats completely lowered, the position of the slats of both curtain areas preferably in a completely closed or. bring open situation. This is done by rotating the winding shaft 2 by means of the actuator mentioned.

The effect of the stops is explained with the aid of the schematic FIGS. 3 to 5. In each case, FIG. A) shows the upper slat area and FIG. B) the lower slat area next to each other for the sake of clarity.

By turning the wind-up shaft in the direction of the arrow, the two rocker disks 6 and 7 are also taken along via the friction clutches until their associated spring ends 8 'and. 9 'to the respective end stops 18 resp. 20 concerns. So that the slats 22 respectively. 23 of the slat curtain in the horizontal position shown, i.e. fully open position, brought. In this position, the slats can be neatly pulled up by the elevator belt.

If the slat curtain is now to be lowered, the winding shaft is rotated in the direction of the arrow as shown in FIG. 4. As previously explained with reference to FIGS. 1 and 2, the slide 14 is in the stop position. The spring end 8 ″ of the rocker disk 6 thus immediately comes to rest against the slide 14 serving as a stop, as shown in FIG. 4 a). Thus, the slats 22 remain approximately in the open position shown when lowering. The rocker 7 is pivoted when lowering by a certain angle, here for example about 37 ^o , until the spring end 9 ″ also comes to a stop against the slide 14. As a result, the slats 23 are pivoted via the swivel members 12, 13 into a slightly closed position (in the figures is on the inside of the slat curtain on the right-hand side and the outside of a building on the left-hand side). This lowers the slat curtain with the slats open in the upper area and partially closed in the lower area. This setting is particularly advantageous for VDU workstations. As soon as the curtain is completely lowered, the slide 14 is moved, as described above, in such a way that the stop action is canceled. The rocker disks can now be pivoted further in the direction of the arrow, as shown in FIG. 5, until the spring ends 8 ″ or. 9 '' to the corresponding end stops 19 resp. 21 arrive and thus the slats 22 and in both slat curtain areas. 23 can be closed completely. In this completely lowered position, the two rockers 6 and 7 can freely between the end stops 18 and 19 respectively. 20 and 21 can be pivoted by turning the winding shaft. As soon as the wind-up shaft is rotated further in the wind-up direction (arrow direction in FIG. 3), the slat curtain is pulled up again by the elevator belt and the slider 14 is thus brought back into the stop position (position according to FIG. 3).

The position of the elevator belt and the swivel members on the slats is shown schematically in FIG. The slat curtain is formed by the slats 22 in the upper area and the slats 23 in the lower area. The elevator belt 5, which can be wound onto the spool 4, leads through openings 22 ', 23' in the slats 22, 23 to a closing slat (not shown). The slats 22 of the upper slat curtain area are connected to one another by swivel cords 10, 11. The swivel cords 10, 11 lead to the rocker disk 6. By rotating the swivel disk 6, the slats 22 can be pivoted together. The slats 23 of the lower slat curtain area are also connected to one another by further swivel cords 12, 13 and can be swiveled by the rocker disk 7. These swivel cords 12, 13 are for example by eyelets 24 on the Slats 22 out. Advantageously, the swivel cords 10, 11 respectively. 12, 13 between the respective uppermost slat of the corresponding slat curtain area and the corresponding rocker disk 6, respectively. 7 length adjustment elements. This means that the basic slat position can be precisely adjusted when the slatted curtain is fully installed.

The proposed device according to the invention is particularly suitable for a slatted curtain with slats which can be pivoted separately in an upper and lower region, as are particularly advantageously used for VDU workstations. This makes it very easy to adjust the slat positions of both curtain areas as required with just a single operation and to lower or open the entire slat curtain.

Claims (8)

Raffing and swiveling device for slat blinds with a winding shaft (2), which has a spool (4) for an elevator element (5) of the slat blind curtain and a turning element (6, 7) which can be rotated on the winding shaft (2) and on which the two ends of the swiveling elements (10,11,12,13) for the lamellae and one coupling (8,9) acting frictionally between the winding shaft (2) and the turning element (6,7) and two end stops to limit the turning range of the turning element (6 , 7) resp. of the slats and an intermediate stop (14) arranged between them and actuated by the elevator member (5), the stop effect of which is canceled when the slatted blind curtain is completely lowered, characterized in that at least two turning elements (6, 7) are provided on the common winding shaft (2) , the intermediate stops of which are formed by a common locking slide (14) and which each take up the two ends (10, 11, 12, 13) of support members of only one area of the lamella curtain. Device according to claim 1, characterized in that two turning elements (6, 7) are provided for an upper and a lower area of the lamella curtain. Device according to claim 2, characterized in that the end stops (18, 19, 20, 21) for the two turning elements (6, 7) are arranged in such a way that in the one end position all the blades (22, 23) of both areas of the blade curtain in the closed position are brought and in the other end position all the slats of both areas of the slat curtain are brought into the fully open position. Device according to one of claims 2 to 3, characterized in that the intermediate stop (14) is arranged such that when the turning elements (6, 7) stop, the slats (22) of the upper slat curtain are brought into the open position and the slats (23) of the lower slat curtain are brought into a predetermined, partially closed position. Apparatus according to claim 4, characterized in that the intermediate stop (14) is arranged such that the turning area of the upper curtain area between its first end stop (18) and the intermediate stop (14) is between 0 ° and 10 ° and that the turning area of the lower Curtain area between its first end stop (20) and the intermediate stop (14) is between 30 ° and 50 °. Device according to one of claims 1 to 5, characterized in that the end stops (18, 19 or 20, 21) of the rocker disks (6, 7) are arranged in such a way that the lamellae (22, 23) are perpendicular to the one end position Lowering or Lift direction and completely closed in the other end position, i.e. approximately parallel to the lowering or Winding direction are aligned. Device according to one of claims 1 to 6, characterized in that the locking slide (14) is spring-loaded, arranged parallel to the elevator axis (2) and by means of an actuator (16) which is radially movable in the elevator spool (4) and is equipped with a spring (17) ), which is pressed in the not completely lowered position of the slat blind by the elevator member (5) towards the elevator axis (2), can be actuated parallel to the elevator axis (2) against a spring element (15). Roman blinds with a device according to one of claims 1 to 7.

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