EP1921246B1 - Stop device for the opening and closing of a blind - Google Patents

Abstract

The device has a stopper pin, a spring unit (20) and a stopper socket (15) that is movable between the stopper pin and the spring unit. The stopper socket is coupled with an opening and closing movement of a shading system in a kinematic manner. The pin and/or the spring unit are fixable at a desired stopper position by a clamping unit (30). The clamping unit is arranged outside a winding shaft for hangings, and is arranged in an axial direction of the winding shaft. The pin and the spring unit are adjustable.

Description

The invention relates to a device for the opening and closing movement of a shading system, in particular for the winding and unwinding of a roller blind, with two adjustable stop means and a movable between the stop means stop sleeve, which is kinematically coupled to the opening and closing movement of the shading system, wherein at least one of the stop means is adjustable at a desired stop position by means of a locking device, and the locking device is arranged in the axial direction of a winding shaft outside the winding shaft for the curtain. Furthermore, the invention relates to a shading system with such a device.

Such a device and a shading system with such a device is from the document DE 16 54 082 A1 known.

From the publication EP 1 215 361 A1 a device is known in which the locking device is arranged radially to a winding shaft outside the winding shaft. The publication CH 669 824 A5 describes a device with an actuator for fixing a pin of a spindle of a shading system.

Next is from the document DE 1 876 411 U a device and a shading system, in which the device comprises a spindle, on which a spindle nut out and back and forth between two stops is movable. The stops are designed as sleeves placed on the spindle, which each consist of two half-shells and are screwed together. After a suitable position for the stops on the spindle is set, the screws are tightened and thereby set the stops on the spindle, namely clamped. Subsequently, the winding shaft is pushed over the spindle with the stops, so that this stop device is not accessible from the outside. If the stops have to be readjusted, the winding shaft must be dismantled and the stop device removed each time. This is very cumbersome and the attacks are difficult to adjust. Also, the initial setting of the attacks is cumbersome, since the curtain is firmly attached to the dismantled during adjustment winding shaft. The setting of the attacks can therefore not be done directly by appropriate winding or unwinding of the curtain.

From the DE 25 11 603 C2 a limit switch for roller shutters, awnings and the like is known, which has two threaded spindles, on each of which a traveling nut and a stop is arranged. The stops are fixed and not movable. To set the path of Wandemuttem the threaded spindles are disengaged so that they can not be driven. It is disadvantageous that two threaded spindles and Wandemuttem are necessary, whereby a compact design is difficult. In contrast, the stop device according to the type mentioned only on a movable stop sleeve.

Accordingly, the invention is based on the problem, a device and a shading system of the type mentioned in such a way that the attacks are easily adjustable without requiring, for example, the winding shaft of a roller blind must be dismantled.

To solve this problem, the device according to the invention is characterized in that the stop sleeve reciprocates on a threaded sleeve between the arranged on this threaded sleeve stop devices.

According to the invention, therefore, a spatial separation of the actual stop devices and the locking device is provided. The stop device can be arranged within the winding shaft. The locking device for fixing the stop positions of the stop devices is arranged in any case outside of the winding shaft and therefore accessible even when mounted winding shaft. In this way, the corresponding stop device or both stop devices can be adjusted directly by appropriate winding or unwinding of the curtain. In addition, an adjustment of the stop positions later easily possible.

According to a further development, the stop sleeve reciprocates on a threaded sleeve between the stop devices arranged on this threaded sleeve. Thus, a stop sleeve between two stop devices is arranged on a threaded sleeve. The adjustment of the trail is done via a setting of the adjustable anchor devices. In this case, it is advantageous that as a result an overall compact design is possible and only a few components are necessary. This makes aesthetically pleasing shading systems with small dimensions possible.

The locking device is seen in the axial direction of the winding shaft arranged outside of the winding shaft, ie in the axial extension. This positioning is particularly favorable for reasons of space.

One of the stop means is associated with a threaded sleeve and the other stop means of an adjustable arranged to the threaded sleeve stop sleeve. In this case, a stop sleeve is provided, which has a thread complementary to the threaded sleeve thread. This stop sleeve thus runs by relative rotation of the threaded sleeve relative to the stop sleeve on the threaded sleeve between the stop devices back and forth. Preferably, the stop sleeve is associated with a thread of the threaded sleeve complementary thread. As a result, by adjusting the stop sleeve and the threaded sleeve against each other, the attacks can be adjusted in a particularly simple manner. It is particularly advantageous in terms of construction if the threaded sleeve is assigned a bolt or spindle thread, while accordingly the stop sleeve and the stop sleeve have a complementary nut thread.

According to a further constructive embodiment of the invention, the threaded sleeve and / or the stop sleeve by means of the locking device in their respective position detectable and thus fixed the attacks. In this case, the stop sleeve can be guided displaceably on a rotatably connected to it central shaft. This central shaft is then fixed by means of the locking device and thus fixes the stop sleeve in their respective stop position. For fixing the central shaft and / or the threaded sleeve is preferably a clamping element. This can be provided with a toothing, so that the central shaft and / or the threaded sleeve are provided with a complementary toothing. In this way, a positive locking results.

According to a development of the aforementioned structural design, both the threaded sleeve and the central shaft are each a separate Assigned clamping element, so that they are independent of each other adjustable. The clamping elements should continue to be the same, which reduces storage. By rotating the clamping elements by 180 ° to each other it is ensured that the teeth are arranged once on one side and once on the other side, so that the teeth of a clamping element with the teeth of the threaded sleeve and the teeth of the other clamping element with the teeth of the central shaft is engaged. To ensure a certain leadership of the clamping elements against each other, offers a T-slot.

At least one of the stop devices may have a pocket in which a complementary stop pin of the stop sleeve engages in an end position. By engaging the corresponding stop pin in the pocket, the stop sleeve can take the corresponding stop means for readjusting one of the two Behangendlagen in both directions, which facilitates readjustment. In particular, a reset is possible if the desired position was accidentally exceeded when setting. In this case, the corresponding stop pin snaps into the corresponding pocket only in the stop position corresponding to the respective stop end position. In normal operation with locked stop device, it slides out of the bag when leaving the appropriate Behangendlage again, which requires a certain but not disturbing breakaway torque. This breakaway torque need only be greater than the frictional forces with dissolved stop means, since the stop pin would otherwise slip out of the associated pocket during readjustment.

• Fig. 1. Eine Anschlageinrichtung mit den Erfindungsmerkmalen in teilmontiertem Zustand in perspektivischer Darstellung (Einbauzustand),
• Fig. 2 die Anschlageinrichtung gemäß Fig. 1 in montiertem Zustand bei maximalen Verfahrweg in perspektivischer Darstellung,
• Fig.3 die Anschlageinrichtung gemäß Fig. 1 in Seitenansicht in einer Zwischenstellung entsprechend halb geöffnetem Behang,
• Fig.4 die Anschlageinrichtung gemäß Fig. 1 ebenfalls in Einbauzustand in Seitenansicht,
• Fig.5 die Anschlageinrichtung gemäß Fig. 1 in der Wickelwelle montiert im Längsschnitt,
• Fig. 6 die Anschlageinrichtung gemäß Fig. 1 in perspektivischer Explosionsdarstellung,
• Fig. 7 die Anschlageinrichtung gemäß Fig. 1 im Querschnitt in der Ebene VII - VII gemäß Fig. 5,
• Fig.8 ein Detail der Anschlageinrichtung gemäß Fig. 1 in perspektivischer Explosionsdarstellung.

The invention will be explained in more detail with reference to an embodiment shown in the drawing. In the drawing show:

• Fig. 1 , A stop device with the features of the invention in a partially assembled state in a perspective view (installed state),
• Fig. 2 the stop device according to Fig. 1 in assembled state at maximum travel in perspective,
• Figure 3 the stop device according to Fig. 1 in side view in an intermediate position corresponding to half-opened curtain,
• Figure 4 the stop device according to Fig. 1 also in installed state in side view,
• Figure 5 the stop device according to Fig. 1 mounted in the winding shaft in longitudinal section,
• Fig. 6 the stop device according to Fig. 1 in a perspective exploded view,
• Fig. 7 the stop device according to Fig. 1 in cross section in the plane VII - VII according to Fig. 5 .
• Figure 8 a detail of the stop device according to Fig. 1 in a perspective exploded view.

The illustrated stop device has a central shaft 10, which does not rotate with the rotation of a winding shaft 11, so when winding and unwinding of the fabric, for example, a roller blind. At both ends of the central shaft 10, a respective bearing 12, 13 is arranged, which are rotatable relative to the central shaft 10 and the winding shaft 11 store. Alternatively, the bearings 12, 13 may be fixed, so that then the winding shaft rotates on the bearings 12, 13.

On the central shaft 10 is further provided with a spindle thread threaded sleeve 14 is mounted on which a trained as a spindle nut stop sleeve 15 is rotatably guided. The spindle thread of the threaded sleeve 14 and the nut thread of the stop sleeve 15 are engaged with each other, so that the stop sleeve 15 by turning the stop sleeve 15 on the threaded sleeve 14 back and forth.

On the central shaft 10, a stop sleeve 16 is further arranged, which also receives the threaded sleeve 14 in at least part of its axial length. The distance between the stop sleeve 16 and a spring element 17 on the threaded sleeve 14 from each other and thus the free thread length of the threaded sleeve 14 limit the number of revolutions, which can make the stop sleeve 15 , And thus the number of revolutions of the rotatably connected to the stop sleeve 15 winding shaft 11. The spring element 17 cooperates with a complementary stop pin 18 on the stop sleeve 15. Specifically, two opposing spring elements 17 are provided, each of which cooperates with a stop pin 18. The stop pin 18 engages in its stop position in a pocket 40 of the spring element 17 a.

On the opposite side of the stop sleeve 15, a further stop pin 19 is provided, which cooperates with a stop formed by a spring element 20. This spring element 20, of which, in particular in Fig. 6 it can be seen, in concrete terms, two spring elements 20 are arranged diametrically opposite to the stop sleeve 16, are rotatably connected to the stop sleeve 16 and have on its inside, as well as in Fig. 6 It can be seen clearly that the actual thread 21, by means of which the stop sleeve 16 cooperates with the threaded sleeve 14.

The setting is now done concretely as follows:

First, the stop sleeve 15 is driven so with the stop sleeve 16 to block that the stop sleeve 16 facing stop pin 19 of the stop sleeve 15 engages in a pocket 22 on the spring element 20, and then driven the stop sleeve 15 with the stop sleeve 16 in the direction of the bearing 12 is until the stop pin 18 engages in the pocket 40 of the spring element 17 (installation state, Fig. 1 . 4 ). Now the threaded sleeve 14 is rotated together with the stop sleeve 15 and the stop sleeve 16 until the fabric has reached one of its two end positions (blind fully open or fully closed). In this case, the stop sleeve 15 rotates together with the stop sleeve 16 and the threaded sleeve 14 against a certain frictional resistance. The threaded sleeve 14 has at its bearing 12 facing the free end of a bulge 23 ( Fig. 5 . 6 ), which protrudes from the bearing 12. This bulge 23 is provided with an internal toothing 24 which cooperates with a complementary toothing 25 on a clamping element 26. The clamping element 26 is then pulled by a screw 27 radially outwardly against a holding element 28, whereby the teeth 24, 25 engage each other. Since the holding member 28 is held in a manner to be described, thus the threaded sleeve 14 is fixed in its rotational angle position. The spring element 17 is set in a position which is assigned to one of the end positions of the curtain.

Now the other end position of the curtain is approached by turning the stop sleeve 15 together with the stop sleeve 16, wherein the stop sleeve 15 is removed together with the stop sleeve 16 from the bearing 12. The stop sleeve 16 slides on the central shaft 10. Since the stop sleeve 16 is rotatably connected to the central shaft 10, the central shaft 10 rotates with. As soon as the other end position of the blind is reached, another screw 29, which cooperates with a further clamping element 30, is tightened. As a result, this clamping element 30 is pulled radially outward against the retaining element 28. The toothing 25 of this further clamping element 30 engages with a Internal toothing 31 on a fixedly connected to the central shaft 10, namely screwed sleeve 32. As a result, the sleeve 32 and thus the central shaft 10 is fixed to the stop sleeve 16 in its, the other end position of the blind associated position.

The stop device described so far is supported on a roller bearing 33, which engages with its bearing shaft 34 in the sleeve 32 ( Fig. 3 . 5 ). The roller bearing 33 has a pocket 35 into which engages a locking tab 36 integrally formed on the retaining element 28. As a result, the holding element 28, as described above, fixed non-rotatably and thus can also fix in the manner described above by tightening the screws 27, 29, the threaded sleeve 14 and the stop sleeve 16. Since the winding shaft 11, as in particular from Fig. 5 can be seen well, not to the area on the screws 27, 28 ranges, but rests on a collar 37 on the bearing 12, the screws 27 and 29 are accessible at any time and the stopper can be readjusted, in which the respective associated screw 27th or 29 is solved so far that the respective teeth 24, 25, 31 get out of engagement with each other. So that the retaining element 28 does not slip out of the pocket 35 when the screws 27, 29 are loosened, it is additionally secured with a screw 39.

Also, for readjustment, it is advantageous that the stop pins 18, 19 engage in the pockets 22, 40 of the spring elements 17, 20. If only the end position of the blind is adjusted, which is assigned to the stop sleeve 16, the curtain is opened up or unwound until the stop pin 19 is locked in the pocket 22. Now the associated screw 29 is released until the teeth 25 disengaged from the internal teeth 31 on the sleeve 32. Now the Behangendlage can be readjusted by turning the winding shaft 11 and then the screw 29 are tightened again.

If, analogously, only the end position of the blind be adjusted, which is assigned to the bearing 12, the curtain is wound as far as the other stop pin 18 engages in the pocket 40 of the spring element 17. Now, the bearing 12 associated with the screw 27 is released until the teeth 25 disengaged from the internal teeth 24 at the bulge 23. After the hanging end position is readjusted by turning the winding shaft, the screw 27 is tightened again.

If both curtain end layers are to be readjusted, which is often the case with new systems, since the curtain often still stretches in the first few days due to its own weight and own weight of a weighting profile normally attached to its lower edge, it will preferably be both screws 27 and 29 are loosened and the device returns to the in Fig. 1 or 4 shown installed state. This is already described above. In this readjustment of the stopper should always first approach the stop pin 17 on the threaded sleeve 14 and then the stop sleeve 16 associated Behangendlage.

As I said, for readjustment, it is noticeable that the stop pins 18 and 19 act on the stop sleeve 15 not only with simple attacks, which would be sufficient for normal operation. But since they engage in pockets 22 and 40, they can take the associated spring element 17 or 20 and thus the bearing or the stop sleeve 16 in both directions of rotation. Both suspension end positions can be readjusted in both directions.

As in particular in Fig. 8 can be clearly seen, the clamping elements 26 and 30 are identical. They are each rotated by 180 ° to each other used, so that your teeth 25 on the threaded sleeve 14 and the internal gear 31 is assigned to the sleeve 32. At their mutually facing ends, the clamping elements 26, 30 T-grooves 38, by means of which they are slidably guided in the radial direction to each other.

In order for the central shaft 10 to absorb torsional forces to a sufficient degree, it should be manufactured as an aluminum strand profile. Furthermore, it is also possible to manufacture the central shaft 10 and the sleeve 32 in one piece and not, as shown, to screw together. Furthermore, it is also provided for manufacturing simplification that the stop sleeve 16 is provided with separate spring elements 20. Of course, however, a one-piece production is possible here.

LIST OF REFERENCE NUMBERS

10

Central shaft

11

winding shaft

12

camp

13

camp

14

threaded sleeve

15

stop sleeve

16

stop sleeve

17

stop pin

18

stop pin

19

stop pin

20

spring element

21

thread

22

bag

23

tulip-shaped section

24

internal gearing

25

gearing

26

clamping element

27

screw

28

retaining element

29

screw

30

clamping element

31

internal gearing

32

shell

33

Rollo camp

34

bearing shaft

35

bag

36

Arretiertasche

37

collar

38

T-slot

39

screw

40

bag

Claims (8)

1. A device for the opening and closing of a blind, in particular for the winding up and the winding down of a roller blind, having two adjustable anchorage devices (17, 20) and a movable stop fitting (15) between the anchorage devices (17, 20), said fitting (15) being able to be kinematically coupled with the opening and closing of the shading device, wherein at least one of the anchorage devices (17, 20) is lockable in a desired stop position by means of a locking device (26, 30), and the locking device (26, 30) seen in the axial direction of a winding shaft (11) can be arranged outside the winding shaft (11) for the hanging device, characterised in that the stop fitting (15) runs back and forth on a threaded sleeve (14) between the anchorage devices (17, 20) that are arranged on said threaded sleeve (14).
2. The device according to claim 1, characterised in that both anchorage devices (17, 20) are adjustable.
3. The device according to one of claims 1 or 2, characterised in that the one anchorage device (17) is associated with the threaded sleeve (14) and the other anchorage device (20) is associated with an adjustable anchorage sleeve (16) arranged for the threaded sleeve (14), in particular where said sleeve (16) has a complementary thread for the threaded sleeve (14), wherein the stop fitting (15) possesses a complementary thread for the thread of the threaded sleeve, and that the threaded sleeve (14) preferably possesses a bolt thread.
4. The device according to one of the previous claims, characterised in that the threaded sleeve (14) and/or the anchorage sleeve (16) are lockable by means of the locking device (26, 30), wherein the anchorage sleeve (16) is preferably carried on a central shank (10) that is connected to it for co-rotation and said central shank (10) is fixable by means of the locking device (30).
5. The device according to claim 4, characterised in that the central shank (10) and/or the threaded sleeve (14) is fixable by means of a clamping element (26, 30) and a toothing (2, 31) is preferably associated to the central shank (10) and/or to the threaded sleeve (14) and cooperates with a toothing (25) on the clamping element (26, 30).
6. The device according to claim 5, characterised in that a separate clamping element (26, 30) is each associated with both the threaded sleeve (14) as well as the central shank (10), wherein the clamping elements (26, 30) are preferably shaped identically and are arranged at an angle of 180° to one another, such that their toothings (25) are each arranged on opposite sides, wherein the clamping elements (26, 30) are preferably guided towards one another in particular by means of a T groove (38).
7. The device according to one of claims 1 to 6, characterised in that at least one of the anchorage devices (17, 20) possesses a recess (22, 40), into which engages a complementary stop pin (18, 19) of the stop fitting (15) in an end position.
8. The blind with a device according to one of claims 1 to 7.

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