EP3327235B1 - Device for opening and/or closing a wing - Google Patents

Description

The invention relates to a device for opening and / or closing a sash according to the preamble of claim 1.

It is known to use X or Y scissors to open a leaf of a door or a window in rotation and thereby deflect the movement of a spindle drive in such a way that they correspond to the direction of movement of the leaf. As a result, the spindle drives can be installed parallel to the frame construction of the sash and no longer protrude into the room. The power transmission between the drive and the scissors takes place with the help of push rods. The disadvantage of X and Y scissors is the low transferable forces when the scissors are close to the extended position. The extended position of the scissors is called the dead center position. During the closing movement of parallel opening windows, the scissors are near this dead center position at the end of the sash movement. Further measures are necessary in order to ensure that the window is securely locked and that it is pressed firmly against the seals on the frame. These are an additional locking motor with an associated locking mechanism or an additional construction, such as from EP 1389662 A2 famous. In the EP 1389662 A2 the locking movement is achieved with the help of a corresponding idle stroke. The idle stroke of the scissors enables a locking stroke to be generated after the scissors have closed. It is also locked using a locking mechanism. The low forces of the scissors in the vicinity of the dead center also cause problems when opening the sash. On the one hand, the mass of the wing must be accelerated when opening and, on the other hand, pressing the wing away from the seals at the beginning of the movement requires additional force.

From the DE 202012012548 U1 a rotary vane drive has become known which provides a drive device mounted on the frame which drives a pivotable extension arm. The extension arm engages with a pin in a wing-side guide. If the extension arm is swiveled out, the extension arm swings out the sash. In order to prevent an overload of the drive device during manual actuation, the drive shaft can be decoupled from the drive shaft by means of a coupling.

In the U.S. 2,256,613 a door opening mechanism is described which can exert an automated opening movement on the door with an arm driven by an electric motor (there 32), but at the same time also allows the door to move independently of it. The electric motor actuation does not influence the manual opening of the door - otherwise possible, it can remain open when the motor drives back, it can still be opened manually even when the electric motor is not active and a "direct coupling" between the motor and the extension arm opening the door is therefore avoided there. Nevertheless, the person skilled in the art takes from this document an opening element (there 32) which is pivotably mounted on a housing which can be mounted on the frame and in which an electric motor with a gear and the drive rod is arranged. However, the pivotable mounting necessarily includes an additional mechanical longitudinal movement of the pivot bearing on the pillars described there with a guide (cf. 25, 26 and 28/29 there). The drive rod described there is a threaded spindle and has no positive (fixed) coupling to the extension arm via the yoke there (27 there).

The patent also shows DE 42 19 316 C2 a device for opening and / or closing a sash relative to a frame, which comprises a movable drive element for generating a drive movement, as well as an output element connected to the drive element for moving the sash in such a way that the drive element moves an idle stroke relative to the output element and itself executes a working stroke moving together with the output element. The patent shows in particular an electromotive fitting for a sash of windows or doors, which also uses a spindle nut drive to raise the sash. In addition, an actuating element is coupled to the spindle nut via a defined idle stroke. For this purpose, a pin is attached to the spindle nut, which moves in an angled slot of the opening member. At a distance from the angled slot, the opening element is rotatably but fixedly attached to a frame stock. When the spindle nut is moved, the pin moves over the idle stroke along one side of the angled slot until it reaches the angle of the angled slot. At this point the opening movement begins. The patent states that the idle travel can be used to finally lock or unlock a casement with a frame stock via locking pins.

The disadvantage of the above-mentioned configurations is that the devices, due to their arrangement, require a comparatively powerful motor, since the arrangements described above reach a dead-center position when opening and closing, which allows space-saving recording because all the links are in the extended position. but do not have high closing or opening forces. With modern doors in particular, seals lying close to the plane-parallel position of the sash and frame must be pressed against one another.

From the DE 102007007997 B3 a device for opening and closing a sash into a tilted position is known. Since in the tilt opening position a large part of the wing forces are directed into the frame via the tilt bearings, the device is only designed for low forces.

There is therefore a need for a device which provides a simple design with a reliable push-off movement of the sash from the frame with the smallest possible dimensions and power of the motor.

To solve this problem, the combination of features according to the characterizing part of claim 1 is provided. As a result, the wing is already pushed off the frame in an early phase of movement of the drive element and the initially existing space-saving dead center position is canceled. Even if the sash is pressed against the frame as a result of drafts, the drive can pivot the sash and the output element assumes a more favorable force application position, so that lower demands are placed on the motor with regard to the required torques.

The construction is simplified in that the arm is attached eccentrically and pivotably to the drive element and in the partial stroke executes a pivoting movement relative to the output element. The direct connection of the arm to the output element offers a favorable introduction of force. The fact that the arm is Y-shaped and has two fingers also contributes to simplification, whereby a first finger can be assigned to an engagement on the frame and its second finger can be assigned to a locking element of the output element to form a non-rotatable coupling of the arm.

In order to enable the power transmission via the arm, it is provided that the arm has a releasable locking element for fixing the rotational position on the output element. In an alternative not according to the invention, it can be provided that the arm is a two-armed lever pivotably mounted on the output element, the first arm of which can be releasably assigned to an engagement on the frame side and the second arm, which is arranged diametrically thereto, carries a locking element for locking the rotational position on the output element. In this alternative, not according to the invention, it can also be provided that the locking element comprises a locking bar in the form of a projection which is movable radially for pivoting the arm on the output element and which engages in an engagement of the output element to lock the rotational position.

In order to be able to provide a frame-side counter-element for absorbing the forces when the arm is opened, it is provided that the frame-side engagement is one with a pin of the arm forms cooperating locking engagement, the stop edge of which lies in the closing direction of the sash is designed to be elongated compared to the tightening edge in the opening direction.

In order to achieve a simple structure, it is provided that the drive element is designed as a spindle nut of a drive unit attached to the wing.

In order to achieve a space-saving design, it is provided that the drive element is moved within the drive unit in the direction of the pivot bearing of the sash. As a result, the arm is closer to the center of the sash, so that a favorable lever arm favors an initial opening movement in the partial stroke.

Fig. 1

einen Teilausschnitt einer Tür mit einem Abschnitt eines oberen horizontalen Rahmen- und Flügelholms sowie der angrenzenden Vertikalen Rahmen- und Flügelholme, mit einer Freimachung im Bereich einer leicht schematisiert dargestellten Vorrichtung zum Öffnen des Flügels,

Fig. 2

eine Vorrichtung zum Öffnen des Flügels nach Fig. 1 in einer ersten Ausführung in drei Stellungen, in einer Draufsicht ohne Flügel und Rahmen,

Fig. 3

die Vorrichtung nach Fig. 2 in einer Explosionsdarstellung,

Fig. 4

die Vorrichtung nach Fig. 1 und 2 in einer ersten Stellung,

Fig. 5

die Vorrichtung nach Fig. 4 in einer ersten Bewegungsphase,

Fig. 6

die Vorrichtung nach Fig. 4 und 5 in einer Teil-Öffnungsstellung,

Fig. 7

die Vorrichtung nach den Fig. 6 in einer Ansicht von unten,

Fig. 8

die Vorrichtung entsprechend der Fig. 7 in einer Geschlossenstellung,

Fig. 9

einen Ausschnitt einer Tür entsprechend Fig. 1 mit einem zweiten, nicht erfindungsgemäßen Ausführungsbeispiel der Vorrichtung,

Fig. 10

eine Explosionsdarstellung der nicht erfindungsgemäßen Vorrichtung nach Fig. 9,

Fig. 11

die nicht erfindungsgemäße Vorrichtung nach Fig. 10 in einer Einzeldarstellung,

Fig. 12

einen in der Fig. 11 angegeben Vergrößerungsausschnitt,

Fig. 13

die nicht erfindungsgemäße Vorrichtung nach Fign. 10 bis 12 in einer Einzeldarstellung und einer ersten Öffnungsbewegung,

Fig. 14

die nicht erfindungsgemäße Vorrichtung nach Fig. 11 und 13 in einer weiteren Öffnungsbewegung,

Fig. 15

die nicht erfindungsgemäße Vorrichtung nach Fig. 11 bis 14 nach fast vollständiger Öffnungsstellung und

Fign. 16 bis 18

ein weiteres nicht erfindungsgemäßes Ausführungsbeispiel der Vorrichtung in verschiedenen Öffnungsbewegungsstellungen.

Further advantageous configurations emerge from the drawings. It shows:

Fig. 1

a partial section of a door with a section of an upper horizontal frame and sash spar as well as the adjacent vertical frame and sash spars, with a clearance in the area of a device for opening the sash, shown in a slightly schematized manner,

Fig. 2

a device for opening the wing according to Fig. 1 in a first version in three positions, in a plan view without sash and frame,

Fig. 3

the device after Fig. 2 in an exploded view,

Fig. 4

the device after Figs. 1 and 2 in a first position,

Fig. 5

the device after Fig. 4 in a first movement phase,

Fig. 6

the device after Figures 4 and 5 in a partially open position,

Fig. 7

the device according to the Fig. 6 in a view from below,

Fig. 8

the device according to the Fig. 7 in a closed position,

Fig. 9

a section of a door accordingly Fig. 1 with a second embodiment of the device, not according to the invention,

Fig. 10

an exploded view of the device not according to the invention Fig. 9 ,

Fig. 11

the device not according to the invention Fig. 10 in a single representation,

Fig. 12

one in the Fig. 11 specified enlargement section,

Fig. 13

the device not according to the invention Figs. 10 to 12 in a single display and a first opening movement,

Fig. 14

the device not according to the invention Fig. 11 and 13th in a further opening movement,

Fig. 15

the device not according to the invention Figures 11-14 after almost completely open position and

Figs. 16 to 18

another embodiment of the device not according to the invention in different opening movement positions.

The Indian Figure 1 The partially shown stationary frame 1 supports a wing 3 pivotable about a vertical axis 2. The position of the axis 2 is only exemplary with regard to its position relative to the wing 3 and frame 1 and can also be movable via a scissor construction of the joint members. A device 4, which can bring about a pivoting movement of the wing 3 relative to the frame 1, is attached to the wing 3. The device 4 has a motor 5, a drive element 6, an output element 7 and an arm 8 which acts between the drive element and the output element.

The details of the structure of the device 4 emerge from FIG Fig. 2 , from which it can be seen that the motor 5 drives a spindle 9 and the drive element 6 is a spindle nut that is non-rotatably relative to the spindle 9 and slidably guided along it in a housing (not shown). The output element 7 is an extension arm which is assigned to a frame bearing 10 so as to be pivotable. The arm 8 is effective between the drive element 6 and the output element 7. The arm 8 is attached to the drive element 6 eccentrically and pivotably with respect to the output element 7. As a result, when the spindle 9 is rotated and the arm 8 is displaced in a partial stroke of the drive element, the arm 8 executes a pivoting movement relative to the output element 7, as compared with the different opening widths of the Fig. 2 becomes clear. The arm 8 is Y-shaped and has two fingers 11, 12. A first finger 11 is longer in relation to the connection to the drive element 6 and can be assigned to a frame-side engagement 13, while the second finger 12 can be assigned to a locking element 14 of the output element 7 and can be locked with this to form a rotationally fixed coupling of the arm 8 to the output element 7 .

These details are in the Fig. 3 can be seen in which the Y-like structure of the arm 8 can be seen particularly well. The frame bearing 10 is a plate made of rectangular flat material and provided with openings for fastening means. The connection to the output element 7 is made via a pin 15. The output element 7 is itself pivotally connected to the arm 8 via the bolt 16. Furthermore, the locking element 14 is pivotably attached to the output element 7 via the bolt 17. The locking element 14 is an angular two-armed lever, the first lever arm 18 of which rests flat against the output element 7. The second lever arm 19 has a catch opening 20. A leg spring, not shown here, acts on the locking element 14 based on the Fig. 2 clockwise, pivoting torque about the bolt 17. As a result, the catch opening 20 can be brought into operative connection with a locking pin 22 which is attached to the finger 12 of the arm 8. A stop bolt 23 limits the rotational movement of the locking element 14. A further locking pin 24 is attached to the finger 11 and can come into operative connection with the engagement 13 fixed to the frame. A buffer 21 is also provided on the frame side, against which the locking element 14 can rest. On the basis of the configuration described above, based on the Figures 4 to 8 following function.

If the motor 5, preferably designed as an electric motor, is energized in a closed position of the sash 3 and all locks of the closure fitting are in the open position, the spindle 9 begins to rotate and the drive element 6 moves along the spindle to the left. The spindle 9 and the output element are initially parallel to each other to save space, but laterally offset. As a result of the parallel offset, this extended position means that the arm 8 swings out around the bolt 16 in a first partial stroke of the drive element, namely clockwise in the drawing ( Fig. 4 ). This pivoting movement causes the locking pin 24 to move to the right out of the engagement in a supporting manner on the engagement 13 and thereby transfer the wing 3 from the position parallel to the surface into a slightly inclined position. The supporting movement occurring in the first partial stroke acts on the frame remote from the axis of rotation and therefore enables a comparatively large torque to be generated about the axis 2. From the Figures 3 to 8 It can be seen that the frame-side engagement 13 forms a locking engagement that interacts with a locking pin 24 of the arm 8, the stop edge 26 of which lies in the closing direction 25 of the leaf 3 and is elongated compared to the pulling edge 28 lying in the opening direction 27. As a result of the pivoting movement of the arm 8, the locking pin 24 therefore disengages from the tightening edge 28 and reaches the stop edge 26 and is thereby released in the opening direction 27. At the same time, the locking pin 22 approaches the output element 7. From the Fig. 5 it can also be seen that the first lever arm 18 projects beyond the end of the output element 7 and ends in the area of the buffer. At the end of the partial stroke, the arm 8 latches by means of the locking element 14 on the output element 7, as in FIG Fig. 5 shown. The now more favorable power drive point allows a progressive opening of the wing 3 when the drive element 6 is moved away from the motor 5. The arm 8, which is locked in a rotationally fixed manner with the output element 7, forms a rigid extension arm. The locking pin 24 protrudes with the finger 11 in the direction of the frame 1 and in the closing direction 25. It also lags behind the output element 7 during the opening movement. It's in the Fig. 6 also clearly recognizable that the first Lever arm 18 of locking element 14 protrudes beyond the end of output element 7. From the Fig. 7 it can be seen that the finger 11 has a stop which protrudes from the plane of the finger 11 into the plane of the output element 7 and thereby forms a rotation angle limitation. The locking element 14 engages around the locking pin 22 with the catch opening 20.

In the Fig. 8 the interaction of the locking element 14 with the buffer 21 is clear in a view from below.

When the wing 3 is closed via the device 4, the overall sequence is reversed. When the sash 3 is closed, the locking pin 24 with the arm 8 rushes ahead and therefore strikes the extended stop edge 26 ahead of the sash. From the Fig. 8 it can be seen that the locking element 14 by striking the first lever arm 18 on the buffer 21 in the Fig. 8 is pivoted counterclockwise and thus releases the locking pin 22. In this way, when the sash 3 is moved in the closing direction 25, the partial stroke is initiated. By this striking, the mutual locking of the output element 7 and the arm 8 is first released. If the drive element 6 continues to move in the direction of the motor 5, the arm 8 swivels and this swivels with the locking pin 24 behind the tightening edge 28 and pulls the device 1 together with the sash 3 onto the frame 1.

In the Fig. 9 a second embodiment not according to the invention is given. This is explained in more detail in the following figures and differs mainly from the previous exemplary embodiment in the design of the arm 8 and the locking element 14 on the frame bearing 10. Due to the small dimensions of the motor 5, the device 4 can be accommodated in a rebate recess of the wing 3.

The device 4 is provided with a support rail 30 to which a first bearing 31 and a second bearing 32 can be fastened. The bearings 31, 32 ensure the rotatable mounting of the spindle 9 and the support rail 30 ensures the slidable, non-rotatable guidance of the drive element 6. A coupling 33, which is received in the bearing 32, acts between the motor 5 and the spindle 9. The arm 8 is made in two parts and has a first arm part 34 and a second arm part 35. The first arm part 34 is pivotably assigned to the drive element 6 and is penetrated in a bore by a pin plate 36, which is exchangeably attached to the drive element 6 . A Seeger ring secures the connection. A pin 37 reaches through the arm part 34 in an elongated hole 38 and is caulked in the arm part 34. A pin 39 penetrates the first arm part 34 in a bore and that second arm part 35 in an elongated hole 40 of the second arm part 35. The pin 39 also engages through a bore 41 of the output element 7. The locking pin 24 is attached to the end 29. A spring 42 is effective between the arm part 35 and the arm part 34 at the end of the elongated hole recess 40 which is close to the end 29. The spring 42 urges the arm part 35 away from the pivot bearing of the arm part 34 formed by the bore 41.

Fig. 11 shows the compact design of the device 4 and the position of the enlarged detail Fig. 12 . So is in the Fig. 12 It can be seen that the output element 7 forms a radial circumferential section 45 relative to the pin 39 forming the axis of rotation. A radial nose 46 and an engagement 47 with a protruding edge 48 delimit the circumferential section 45. The arm part 35 engages with a projection 49 in the circumferential section 45. The projection 49 and the engagement 47 are coordinated with one another in such a way that the projection 49 can dip into the engagement 47. The elongated hole 40 is dimensioned such that the arm part 34 can dip into it and a flap 51 parallel to the surface is created by an offset 50. The locking pin 24 arranged distally to the pin 37 lies opposite the pin 37 in relation to the pivot axis formed by the pin 39. By means of the spring 42, the arm part 35 is acted upon by force in relation to the arm part 34 away from the pin plate 36 which forms the fixed axis, and the projection 49 is thus pressed against the circumferential section 45.

The arm 8 formed from the arm parts 34,35 thereby forms a two-armed lever pivotably mounted on the output element 7, the first arm of which extends between the pin 39 and the locking pin 24 and the engagement 13 on the frame side can be releasably assigned, the second lever of which is located diametrically therebetween the pin 39 and the pivot bearing of the arm part 34 on the drive element 6, that is to say the pin plate 36. The arm part 35, which can be displaced relative to the arm part 34 along the arrangement of the locking pin 24, the pin 39 and the pin 37, forms the locking element 14 with the projection 49, which can be assigned to the engagement 47, and causes the arm 8 to be locked in its rotational position relative to the output element 7.

Due to the arrangement, when the motor 5 is actuated, the drive element 6 is in the Figs. 10 to 15 moved to the left. In a first partial stroke, starting from a position after Fig. 11 , due to the eccentric arrangement of the drive element 6, to the pivot point on the pin 39 of the arm 8 execute a pivoting movement in a clockwise direction. This is facilitated by a very acute angle which the path of the drive element 6 along the support rail 30 to the output element 7 and its mounting on the pin 15 assumes. The rotary movement of the arm 8 leads to a support of the locking pin 24 on the engagement 13 and pivots the sash 3 out somewhat relative to the frame 1. During the rotary movement, on the one hand, the locking pin 24 is pivoted out of the grip behind the tightening edge 28 and on the other hand, the projection 49 is moved along the circumferential section 45 in the direction of the engagement 47. When the projection 49 finally engages with the engagement 47, the arm 8 and the output element 7 are locked together in a rotationally fixed manner and a further displacement of the drive element 6 leads to the output element 7 pivoting outwards Frame level, always blunt and therefore cheaper. When closing the sash 3 via the motor, the movements described above take place in the reverse order. Here, however, the impact of the locking pin 24 on the stop edge 26 ensures that the arm part 35 is displaced in the direction of the pin plate 36 so that the projection 49 emerges from the engagement 47 and the arm 8 can execute a pivoting movement relative to the output element 7.

That in the Figs. 16 to 18 The exemplary embodiment shown, not according to the invention, differs from the preceding ones by the locking of the arm 8 on the output member 7. The device 4 is shown here again in a simplified manner and reduced to the components essential to the invention. Here, too, as in all of the previous exemplary embodiments, the drive element 6 is a spindle nut which is assigned to a spindle 9 with a coarse thread. An arm 8, which is Y-shaped and forms two fingers 11, 12, is pivotably assigned to the drive element 6. The arm 8 is pivotably connected to the output element 7 via an axis 55 in the form of a bolt. The finger 11 carries the locking pin 24 at its free end and the finger 12 has a stop pin 56. A spring along the indicated line 57 is effective between the mounting of the arm 8 on the drive element 6 and a mounting point fixed to the frame. If the motor 5 of the device 4 is now energized, a partial stroke of the drive element 6 also takes place in this embodiment, which results in a pivoting movement of the arm 8. Here, too, as in the exemplary embodiments described above, the locking pin 24 is pivoted out of the rear engagement with the tightening edge 28 and, through its pivoting movement, causes it to be pushed off the frame 1 in the first partial stroke.

If the stop pin 56 comes to rest on the output element 7, the pivoting movement of the arm 8 relative to the output element 7 is ended. The actuating forces acting on the arm 8 via the drive element 6 cause the stop pin 57 to be pressed against the output element 7. Since the points of articulation of the spring approach each other, the spring is relaxed. When the sash 3 is closed by the motor 5, the spring prevents the arm 8 from pivoting prematurely by the motor 5. Here, the spring together with the stop pin 56 forms a non-positive locking.

All three exemplary embodiments enable an operating method of a device 4 for a door or a window, in which, in a first movement section of an opening process, the drive element 6, an arm 8 pivotable relative to an output element 7, causes the sash 3 to be pushed off and, after it has passed through a partial stroke, an arm 8 between the Arm 8 and the output element 7 effective locking device is activated, which is deactivated by a reverse closing process.

When the door is manually operated, in which a person pushes the wing shut, the output element 7 is forced into a position that is approximately parallel to the spindle 9. The motor 5 is set in rotation via the coarse thread of the spindle 9 and the drive element 6.

As the closing movement of the wing 3 progresses, the non-rotatable connection of the output element 7 and the arm 8 is canceled. In the first exemplary embodiment, this takes place through the interaction of the buffer 21 with the lever arm 18.

In the second exemplary embodiment, not according to the invention, the output element 7 directs the arm 8 to the locking element 13, so that the locking pin 24, which leads the arm 8 and the output element, strikes the stop edge 26. As a result, the second arm part 35 is displaced relative to the first arm part 34 and the locking element 14 consisting of the projection 49 and the engagement 47 is unlocked. It is advantageous here that the arm 8 assumes an inclined position in relation to the engagement 13 and the stop edge 26, so that the frictional forces are reduced.

In the third exemplary embodiment, not according to the invention, the spring tensioned along line 57 is tensioned further.

List of reference symbols

1

frame

2

axis

3

wing

4th

contraption

5

engine

6th

Drive element

7th

Output element

8th

poor

9

spindle

10

Frame storage

11

finger

12th

finger

13th

Intervention

14th

Locking element

15th

Cones

16

bolt

17th

bolt

18th

first lever arm

19th

second lever arm

20th

Catch opening

21

buffer

22nd

Locking pin

23

Stop bolt

24

Locking pin

25th

Closing direction

26th

Stop edge

27

Opening direction

28

Suit edge

29

end

30th

Support rail

31

camp

32

camp

33

coupling

34

first arm part

35

second arm part

36

Tenon plate

37

Cones

38

Long hole

39

Cones

40

Slot recess

41

drilling

42

feather

45

Circumferential section

46

nose

47

Intervention

48

Edge

49

head Start

50

Cranking

51

Rag

55

axis

56

Stop pin

57

line

Claims (5)

1. Device (4) for opening and closing a wing (3) relative to a frame (1), for rotating wings, comprising: A movable drive element (6) in the form of a spindle nut, located in a housing in a torsionally-resistant manner in relation to a spindle (9) and movably guided along this in order to produce a drive movement by means of a motor (5), which drives the spindle (9), a power take-off element (7), connected to the drive unit (6) in order to move the wing (3), which is an extension arm, and which is arranged in a rotatable manner in a frame bearing (10), characterized in that the drive element (6) carries out a partial lift movement relative to the power take-off element (7), moving on the spindle (9), and carries out a working lift movement, moving together with the power take-off element (7), wherein the connection between the drive element (6) and the power take-off element (7) comprises an interlock (14), in order to secure the drive element (6) in a detachable manner at one end of its partial lift to the power take-off element (7), wherein the device comprises an arm (8) which pivots outwards in the course of the partial lift, and which takes effect between the drive element (6) and the power take-off element (7), and, as a result of its pivoting movement, supports the power take-off element (7) and the wing (3) against the frame (1), and, at the end of its pivoting movement, is locked in a torsionally-resistant manner in relation to the power take-off element (7), wherein the arm (8) is secured eccentrically and pivotably to the drive element (6), and in the partial lift movement carries out a pivoting movement relative to the power take-off element (7), and wherein the arm (8) is Y-shaped and comprises two fingers (11,12), wherein the first finger (11) can be assigned to a frame-side engagement (13) of the device (4), and the second finger (12) can be assigned to a locking element (14) of the drive element (7), and can be locked to the drive element (7) in order to form a torsionally-resistant coupling of the arm (8) to the drive element (7).
2. Device (4) according to claim 1, characterized in that the arm (8) comprises a detachable locking element (14) for rotational position fixing to the power take-off element (7).
3. Device (4) according to any one of claims 1 or 2, characterized in that the frame-side engagement (13) forms a locking engagement, which interacts with a locking pin (24) of the arm (8), of which the contact edge (28) lying in the closure direction (25) of the wing (3) is configured as extended in length in relation to the drawing edge (28) lying opposite the opening direction (27).
4. Device (4) according to any one of claims 1 or 3, characterized in that the drive element (6) is configured as a spindle nut which can be secured to the wing (3).
5. Device (4) according to claim 4, characterized in that the drive element (6) is moved inside the drive unit in the direction of the pivot axis (2) of the wing (3).

Images