ES2774550T3 - Arrangement to open, close and lock slats of a slat construction - Google Patents

Abstract

Arrangement for opening, closing and locking slats (2) of a slat construction, containing: at least one circumferentially framed slat (2), a circumferential window frame profile (1), an opening unit, at least one bar coupling (7), at least one drive pivot bracket (8), at least one lever arm (9), at least one cam plate (10), and at least one ratchet (11), wherein: - the at least one slat (2), circumferentially framed, is arranged in lateral contact in each case via a rotary bearing (3), with a rotary axis (12) with the window frame profile (1), wherein - at least one of the rotary bearings (3) has a shaft (13) with a first front surface (14), which is oriented towards the blade (2), which is provided with a connection piece (16) to house the slat (2), and a second front surface (15), - the opening unit consists of a linear drive (4), at least one drawbar (5) and at least one angular deviation (6), the linear drive (4) being arranged below or above the horizontally running portion of the window frame profile (1), and applying force to at least one bar traction bar (5), and each traction bar (5) being in contact, in each case through at least one angular deviation (6), to at least one coupling bar (7), arranged vertically laterally in the window frame profile (1), - each shaft (13) is assigned a trailing pin support (8) with a trailing pin (24) and a lever arm (9), where: - the arm lever (9) with a fixed end (18) is arranged without the possibility of rotation on the second front surface (15) of the shaft (13), and has an elongated hole (20), bent, which can be subdivided into a first arm (21), oriented radially with respect to the axis of rotation (12), a vertex (S) and a second arm (22), which is at a first angle (α), - the drive pivot bracket (8) has a fixed connection to the tie rod (7), and the drive pivot (24) is arranged protruding into the elongated hole (20), so that the linear movement of the tie rod coupling (7), between an upper end position (O) and a lower end position (U), can be converted, through the drive pin support (8), the drive pin (24), the lever arm (9) and the shaft (13), in a turning movement of the slat (2) between a closed position and an open position, and - the second arm (22) is then aligned in parallel with respect to the coupling bar ( 7), when the drive pin (24) is guided in the second arm (22) between the upper end position (O) and the vertex (S), - each cam plate (10) has a fixed connection to one of the coupling rods (7) and in each cam plate (10) a groove (28) is present, which is divided into two zones, a first zone being arranged (29) in parallel with respect to the coupling bar (7), and the second zone (30), adjacent, at a second angle (β) in the direction of the slat (2), where: - to each plate of cams (10) is assigned a pawl (11), where: - the pawl (11) is arranged without the possibility of rotation in the window frame profile (1), - the pawl (11) has a guide pin ( 32), which is arranged protruding in the groove (28) of the cam plate (10), and - a passage (33) is arranged in the window frame profile (1), and in the framed slat (2) Adjacent is a notch (27), - where the pawl (11) protrudes, when the upper end position (O) is set, the guide pin (32) being arranged at the same time at the end of the second zone ( 30) of the slot (28) and all the drive pins (24) in the end zone of the second arm (22), as soon as the slats (2) have adopted the closed position, or - from which the pawl ( 11), when the pi guide vote (32) is in the first zone (29) of the slot (28), - the guide pin (32) is in the second zone (30) of the slot (28), only when the drive pin (24) is on the second arm (22) and the slat (2) is in the closed position.

Description

DESCRIPTION

Arrangement for opening, closing and locking slats of a slat construction

The invention relates to an arrangement for moving and locking slats of a slat construction, which are used in particular in building installations.

Slat constructions generally feature a plurality of rotatably or pivotally mounted slats, which can be moved from side to side by means of a movement mechanism between a closed state and an open state (US 2819 065 A, US 3430 383 TO). Depending on the size or function of the slat construction, it may be necessary to lock them in the closed state. Thus, it is possible, for example, to decouple the movement mechanism and the actuation of the forces that occur when sealing the slat construction with sealing elements. Furthermore, with a suitable locking mechanism it is possible to protect the slat construction from the direct effect of wind loads or to effectively prevent forced opening from the outside. JP H08-86 162 A offers an approach to this. The test for forced opening is carried out according to DIN EN 1627 of September 2011. Consequently, anti-theft windows are components that, in addition to the usual functional tasks, provide a definite resistance against burglary attempts. In this respect, most louver constructions barely reach the RC2 classification. To successfully pass an RC3 rating, a lot of effort must be put into it.

For visual reasons and for protection against environmental influences and contamination, the movement mechanism is advantageously arranged within the slat construction. To do this, it is necessary to keep all this arrangement as compact as possible to move and block the slats.

In patent document DE 102009005594 B4 an arrangement for moving within the frame of a slat construction and provided with a locking mechanism is disclosed. The arrangement to move consists of several lever arms on both sides of the slats. The lever arms are connected to the slat through two swivel joints and to the frame through two swivel joints. Respectively another rotary joint connects the arrangement to move with a linearly movable actuating element on the frame and two of the lever arms. Due to the lengths of the lever arms and the positions of the rotary joints, the slats are tilted and tilted outwards when opening and closing. To lock the slats in the closed state, one of the lever arms has a hooked end which engages a bolt attached to the slat when the slat construction is closed.

The disadvantage of this moveable arrangement is the relatively complex structure with 12 swivel joints per blade. The more joints such an arrangement has, the greater its maintenance effort.

From patent document GB 1396285 A a manually operated moving arrangement for a slat construction is known. The slats each have a short shaft on both sides, through which the axis of rotation of the slats runs.

In order to open and close the slats, the shafts inside the slat construction are rotatably mounted in rotary bearings. In order to couple the rotary movement of the individual slats, the end of one of the shafts is connected on one side of the slats respectively with two coupling rods which can move antiparallel. The coupling rods are movably housed on two pivots oriented axially parallel to the axis of rotation, which are fixed to the respective shaft on both sides of the axis of rotation. A plate with a passage in the shape of an elongated hole is fixed to one of the tie rods between the rotary bearings of two adjacent slats. On the other tie rod, an actuating lever, which can pivot around a pivot point, with a handle is housed in approximately the same position. On the opposite side of the pivot point handle, the operating lever has a driver that engages in the elongated hole-shaped passage of the plate. The driver is a roller rotatably mounted on a bolt. In the case of a pivotal movement of the actuating lever, the coupling rods move antiparallel on the bearing of the actuating lever and on the driver guided inside the passage. The movement is transmitted to the shafts by means of the pivots, whereby all the slats connected to the tie rods move around the axes of rotation.

To lock the slats in the closed state, the passage in the form of an elongated hole running linearly has a bent end. In the closed state of the slat construction, the driver of the operating lever is located there. For locking, the angled end and the driver are positioned relative to the pivot point of the actuating lever so that the driver must pass a reversal point before reaching the angled end, behind which the actuating lever is held in position. the position blocked by a force emanating from the slats. The reversal point is where the driver passes an imaginary connection line with respect to the pivot point of the actuating lever which is oriented perpendicular to the vector of movement of the tie rods. Obviously, the force emanating from the slats is achieved in this case by the counter pressure of the sealing elements. elastic bands on which the slats are placed in the closed state. The reversal point can only be overcome by the manually performed pivoting movement of the actuating lever, so that the slat construction cannot be opened from the outside. The lock would also work with a linear running pitch without the angled end. However, with the end angled, the path of the actuation lever required to assume the locked position can be shortened. It is disadvantageous that after exceeding the reversal point, the force acting on the sealing elements in the closed state decreases again, which can have a disadvantageous effect on the tightness of the slat construction.

Depending on the size of the slat construction, it can furthermore be disadvantageous that only one arrangement to move is present to lock the slats engaged through the tie rods. Sealing the entire slat construction with the elastic sealing elements requires a certain contact pressure. A resulting resistance to movement can cause very high mechanical stress for the individual arrangement.

With the implemented principle of the arrangement to move, 5 rotary joints per blade are required to transmit the rotary movement, higher tolerances can be assumed in the mobile connection between the tie rods and the pivots, which additionally hinder a secure sealing of the construction of slats.

The invention is based on the aim of creating a possibility for an arrangement to move and lock a slat construction which is low maintenance and consists of the fewest possible number of individual parts built in a simple way.

Another objective of the invention is to achieve an RC3 classification according to DIN EN 1627 of September 2011.

The aim is achieved by an arrangement for opening, closing and locking slats of a slat construction containing at least one circumferentially framed slat, a circumferential window frame profile, an opening unit, at least one tie rod, at least a trailing pivot bracket, at least one lever arm, at least one cam plate, and at least one pawl. In this connection, each slat is connected laterally to the window frame profile via a rotary bearing with a rotary axis in each case. At least one rotary bearing of each slat has a shaft that has a first front surface pointing towards the slat, which is provided with a connecting piece to house the slat, and a second front surface. The other single blade slewing bearing in each case is a non-driven rotary bearing if only one tie rod is present. In case a coupling bar is provided on both sides of the slat, the arrangement is constructed with mirror symmetry. The opening unit consists of a linear drive, or one or two tie rods and one or two angular deviations, the linear drive can be arranged above or below the horizontally running portion of the window frame profile. In case two drawbars are present, the force is applied to both drawbars simultaneously, which then always move in opposite directions. For this, respectively a motor lever is mounted on each drawbar. The horizontal movements of the drawbars are deflected at the corners of the window frame by angular deflection towards vertical movements of the laterally vertically arranged tie rods. Each non-driven rotary bearing is assigned a trailing pin support with a trailing pin and a lever arm. In this connection, the lever arm is rotatably connected to the second front surface of the shaft with a fixed end. In the lever arm there is an elongated elongated hole, which can be subdivided into a first arm oriented radially with respect to the axis of rotation, a vertex and a second arm which is at a first angle a, the drive pivot bracket being firmly connected to the tie rod and the drive pin protruding into the elongated hole. Therefore, the linear movement of the tie rod between the upper and lower end position through the trailing pin holder, trailing pin, lever arm and rotary bearing is converted into a rotary movement of the slat. between a closed position and an open position. According to the invention, when the slat is closed, the second arm is aligned parallel to the tie rod, provided that the drive pin is guided in the second arm between the upper end position and the vertex. In other words, also that the drive pin does not initiate any rotary movement in the slat in the path between the upper end position and the vertex. This idle speed is used to provide a blockage of at least one slat either on one side or on both sides. In this regard, each lock is identically constructed in which a cam plate is firmly connected to the tie rod in a free area. This is preferably done to the left and / or to the right above or below the actuated rotary joint of the corresponding slat. In each cam plate a slot has been incorporated, which is subdivided into two zones, a first zone running parallel to the coupling bar and the second adjacent zone running at a second angle p in the direction of the slat. A pawl is assigned to each cam plate, the pawl being rotatably arranged in the window frame profile. Apart from that, the pawl features a guide pin which is arranged protruding into the slot of the cam plate. The pawl protrudes into a notch in the window frame and the adjacent framed slat, in the event that the tie rod has assumed the upper end position. In this final position of the tie rod, the guide pin is at the end of the second slot area and all of the drive pins are at the end area of the second arm. Simultaneously, the slats have adopted the closed position. If the tie rod now moves from the upper end position to the lower end position, the guide pin thus moves away from the slat in the second area, which is at an angle, of the groove , so that therefore the pawl is guided out of the notch. The pawl is fully guided out of the slat when the guide pin has left the second area of the slot and has transferred to the first area of the slot. Simultaneously, the drive pin is still on the second arm or precisely at the apex of the elongated hole.

The essential advantage of the arrangement according to the invention is that, firstly, the slats are locked in all positions by self-locking of the electromechanical drive, secondly, when the slats are in the vertical position (closed position) , an additional self-locking is made between the drive pivot bracket and the lever arm and, thirdly, the ratchet pivots out of the window frame in the closed slat and locks it, so that an opening from the exterior without being destroyed. An arrangement according to the invention allows an RC3 classification.

Advantageous configurations follow from the dependent claims.

The invention will be explained in more detail below using exemplary embodiments. In the attached drawings they show:

fig. 1 schematic representation of an arrangement according to the invention with its essential elements, fig. 2 a part of a basic structure of an arrangement for opening and closing a slat,

fig. 3 a part of a basic structure of the arrangement in a different view,

fig. 4 a basic structure of the arrangement for locking a slat in the locked state,

fig. 5 a basic structure of the arrangement for locking a slat in the unlocked state,

fig. 6a a schematic diagram for the blocked state and the closed louver,

fig. 6b a schematic diagram for the unlocked state, but the louver still closed, and

fig. 6c a schematic diagram for the unlocked state and the open louver.

The essential elements, see fig. 1, of a slat construction according to the invention are a window frame profile 1, slats 2 arranged therein, which are rotatably connected to the window frame profile 1 via respectively two rotary bearings 3, a linear drive 4, which can linearly move, through drawbars 5 and angular deviations 6 arranged horizontally on both sides, coupling rods 7 arranged on the left and right sides between an upper end position O and a lower end position U, drive pivot bracket 8, lever arms 9, a cam plate 10 and a pawl 11.

By means of fig. 2 the mechanism for opening and closing a slat 2 should be described below. The rotary bearing 3 with its rotary axis 12 is in the form of a cylindrical sleeve which is firmly connected to the window frame profile 1.

A shaft 13 is housed in the rotary bearing 3, which is rotatably positioned around the rotary axis 12. The shaft 13 has a first front surface 14 and a second front surface 15. The first front surface 14, according to the fig. 3, is directed towards a slat 2, on which a connection piece 16 is arranged without the possibility of rotation. The connection piece 16 is a parallelepiped-shaped body with which a connection can be produced in positive connection and in connection in force-dragging the slat 2. The second front surface 15 of the shaft 13 has a profile extension 17 arranged coaxially to establish a connection in positive connection and in force-drag connection to the lever arm 9.

The lever arm 9 consists of a flat strip-shaped material, with a fixed end 18 and a loose end 19. With the fixed end 18, the lever arm 9 lies flat against the second front surface 15 and is connected to the shaft 13 without the possibility of rotation through a connection in positive connection with respect to the profile extension 17. The lever arm 9 has an elongated elongated hole 20 with a constant width b. The elongated hole 20 can be subdivided first into a first arm 21 and a second arm 22 running in a straight line, the vertex S being between them. The first included angle a is in this case 135 °. The bent extension 23 represented according to FIG. 2 is optional, but definitely advantageous, which is explained in more detail later. The first arm 21 pointing from the vertex S to the fixed end 18 is arranged in a radial direction with respect to the axis of rotation 12.

Engaged in the elongated hole 20, a cylindrical drive pin 24 is arranged axially parallel to the axis of rotation 12. It has a diameter slightly smaller than the width b of the elongated hole 20, so that it can move with little play.

The drive pin 24 is firmly connected to a drive pin bracket 8. The drive pin bracket 8 is a body that is adjustably attached to a tie rod 7.

The tie rod 7 is arranged with its axis along the window frame profile 1, orthogonal to the axis of rotation 12 and at an axial distance from the axis of rotation 12. The tie rod 7 has a circular cross section and it is linearly movably positioned in two slide bearings 25 along its axis. The slide bearings 25 are arranged along the tie rod 7, symmetrically on both sides of the rotary bearing 3 and are firmly connected to the window frame profile 1.

The drive pivot bracket 8, which carries the drive pivot 24, is housed between the slide bearings 25 on the tie rod 7. To this end, the drive pivot bracket 8 has a through hole with which it is pushed on the tie rod 7. The attachment of the drive pivot bracket 8 to the tie rod 7 is removable and is carried out by means of threaded pins 26 screwed radially with respect to the tie rod 7.

To perform a controlled movement of the slat 2 between an open and a closed and locked state, the tie rod 7 is connected to the linear drive 4 through the angular offset 6 and the drawbar 5. Suitable linear drives 4 are known from the state of the art and are not explained further in this case. With linear drive 4, tie rod 7 is linearly displaced in slide bearings 25.

Fig. 4 and fig. 5 show an enlarged fragment of the locking mechanism. At the upper end of the tie rod 7, as already indicated in fig. 1, a cam plate 10 is attached. The cam plate 10 is also attached to the tie rod 7 as the drive pivot bracket 8, the attachment being removable and performed by means of threaded pins 26 screwed radially with respect to the coupling rod 7. A slot 28 was incorporated into the cam plate 10, which is subdivided into two zones, a first zone 29 running parallel to the coupling rod 7 and the second adjacent zone 30 running at a second angle p (Fig. 5) in the direction of slat 2. The pawl 11 is assigned to the cam plate 10, the pawl 11 being arranged rotatably in the window frame profile 1 by means of a connection 31. Apart from that , the pawl 11 has a guide pin 32 which is arranged protruding into the slot 28 of the cam plate 10. According to fig. 4, the pawl 11 projects through a passage 33 inserted in the window frame profile 1 into a notch 27 inserted in the adjacent framed slat 2. Fig. 2 and fig. 4 show the state of the slat 2 closed and locked, as the coupling rod 7 is in the upper end position O. According to fig. 2, it is clear that the tie rod 7 can be guided a little beyond the upper end position O. Therefore, the drive pin 24 is guided towards the elbow extension 23, whereby a firm pressure and closing of slat 2.

Taking into account the forces required to move the slat 2 and the specification of being able to integrate the arrangement in the window frame profile 1 in such a way as to save as much space as possible, the axial distance between the rotation axis 12 and the coupling 7, and thus also lever arm 9, is kept as short as possible. In the closed state, the lever arm 9 adopts approximately an angle of 45 ° with respect to the imaginary horizontal H.

The first angle a and a radius r of the vertex S with respect to the axis of rotation 12 are coordinated with each other. In the embodiment shown in the figures, the value of the radius r = 45 mm and that of the first angle a = 135 °. In the size range of the first angle a from> 90 ° to <180 °, other values for the radius r and the first angle a are also possible, making sense with the aforementioned specifications and the usual opening angles of slats 2 of a slat construction only a first angle a in the size range between 120 ° and 150 °. The values for the first angle a must always be selected such that the second arm 22 runs parallel to the tie rod 7 in the closed state. As a result of this course, the slat 2 is already blocked against an opening from the outside, since the coupling rod 7 is decoupled from forces (motor torques around the axis of rotation 12). The disengagement of the tie rod 7 is achieved since the drive pivot bracket 8 to drive the slat 2 is positively connected to the window frame profile 1, but can carry out the direction of movement of the tie rod 7 .

In an attempt to twist the slat 2 by an application of external force, the force is transmitted from the shaft 13 through the lever arm 9 to the drive pin 24. A moment acting on the drive pin 24 is oriented almost orthogonally relative to the course of the tie rod 7 due to the orientation of the second arm 22. The introduced force is transmitted radially to the slide bearing 25 through the trailing pivot bracket 8 and the tie rod 7 and is deflected towards the profile window frame 1. A percentage of the force acting on the tie rod 7 in the axial direction is negligible, if any, such that Any force acting on the slat 2 from the outside cannot be converted into a force directed in the direction of movement of the tie rod 7. For this reason, the linear drive 4 connected to the tie rod 7 does not require holding forces high and correspondingly can be designed to be small and cost saving. Apart from that, as is evident from fig. 4, the pawl 11 blocks the opening. By means of Figures 6a to 6c, the sequence of how the closed and locked slat 2 is unlocked and opened should be explained. According to fig. 6a, the tie rod 7 has adopted the upper end position O. For a better view of the sequence, the decisive components were not twisted 90 ° with respect to each other one above the other as in reality, with respect to the rod coupling 7 on which they are attached, but were represented side by side. Thus, in the case of illustrations, it is the same tie rod 7, only the right illustration is rotated horizontally 90 ° from view.

During the controlled movement to open the slat 2, the tie rod 7 is moved downward from the upper end position O by the linear drive 4. After the tie rod 7, the drive pin 24 inside the second arm 22 of the elongated hole 20 and guide pin 32 in the second region 30 of slot 28 simultaneously move down the path c, which in this embodiment has a value of 12 mm. Since the second arm 22 runs parallel to the coupling rod 7, the movement of the drive pin 24 within the second arm 22 does not initially cause any movement of the lever arm 9 and, therefore, no movement of the slat. 2. This is also important in this regard, since the pawl 11 still protrudes in the notch 27 of the slat 2 over the path c from the upper end position O and therefore a rotation of the slat 2 is prevented. Only when the guide pin 32 leaves the second zone 30 and sinks into the first zone 29 of the slot 28, see fig. 6b, the pawl 11 has been guided out of the recess 27, so that the slat 2 is no longer blocked. If the displacement of the tie rod 7 is continued, the guide pin 32 is guided towards the first zone 29 of the slot 28 and, since the first zone 29 runs parallel to the tie rod 7, the pawl 11 it no longer changes its position during a further displacement of the tie rod 7 in the direction of the lower end position U. On the contrary, the drive pin 24 sinks into the elongated hole 20 in the first arm 21 and presses the arm lever 9 in the direction of the lower end position U, see FIG. 6c, whereby the shaft 13 moves around the axis of rotation 12 in a rotary movement and therefore the blade 2 is opened.

The controlled movement of the slat 2 can be continued to a lower end position U of the tie rod 7. In the lower end position U, the slat 2 is in the fully open state. The positions of the upper end position O and the lower end position U depend on the desired positions of slat 2 in the open and closed state and are determined by the configuration of the linear drive 4.

It is possible for the drive pin 24 to pass the imaginary horizontal H to reach the lower end position U. As the horizontal line H passes, the drive pin 24 approaches tangentially to the axis of rotation 12. For this reason, a distance between the axis of rotation 12 and the end of the first arm 21 are always chosen so that the first arm 21 does not limit the tangential approach.

It should be clarified in this case that, in a slat construction with a plurality of slats 2, each slat 2 is connected to the tie rod 7 respectively with only one lever arm 9, a trailing pivot bracket 8 and a pivot pin. drive 24. For the linearly movable mounting of the coupling rod 7, several sliding bearings 25 are provided. The number of sliding bearings 25 corresponds to at least the number of slats 2, the sliding bearings 25 being arranged symmetrically between the rotating bearings 3 of slats 2. All slats 2 of the slat construction move together through the actuated coupling rod 7.

A further design for a slat construction with a plurality of slats 2 is that each slat 2 is provided on each side with an arrangement to move and lock according to Figures 6a to 6c. The two tie rods 7 are then deflected in the lower or upper region of the slat construction and move through the single horizontally arranged linear drive 4.

In the case of a slat construction with several slats 2, the advantages of the removable attachment of the drive pivot bracket 8 and of the cam plate 10 to the tie rod 7 take effect, by means of which a independent adjustment of the 2 individual slats.

Further designs follow from the fact that each slat 2 can be equipped in a releasable manner respectively with two ratchets 11. For reasons of stability, it may be advantageous to provide two tie rods 7 instead of just one tie rod 7, which are then connected to each other in the same direction.

List of references

1 Window frame profile

3 Swivel bearing

4 Linear drive

5 Drawbar

6 Angular deviation

7 Tie rod

8 Trailing pivot bracket

9 Lever arm

10 Cam plate

11 Ratchet

12 Rotation axis

13 Tree

14 First front surface

15 Second front surface

16 Connecting piece

17 Profile extension

18 Fixed end

19 Loose end

20 Elongated hole

21 First arm

22 Second arm

23 Angled extension

24 Drag pivot

25 Sleeve bearing

26 Threaded pin

27 Notch

28 Slot

29 First zone

30 Second zone

31 Union

32 Guide pivot

33 Step

H Horizontal

O Upper end position

S Vertex

U Lower end position

a First angle

P Second angle

a Distance between the axis of rotation 12 and the first arm 21 b Width

c Route

r Radius of the vertex with respect to the axis of rotation 12

Claims (10)

1. Arrangement for opening, closing and locking slats (2) of a slat construction, containing: at least one circumferentially framed slat (2), a circumferential window frame profile (1), an opening unit, at least one tie rod (7), at least one trailing pivot bracket (8), at least a lever arm (9), at least one cam plate (10), and at least one ratchet (11), where: - the at least one slat (2), circumferentially framed, is arranged in lateral contact in each case through a rotary bearing (3), with a rotary axis (12) with the window frame profile (1), where - At least one of the rotary bearings (3) has a shaft (13) with a first front surface (14), which is oriented towards the blade (2), which is provided with a connection piece (16) to accommodate the slat (2), and a second front surface (15), - the opening unit consists of a linear drive (4), at least one drawbar (5) and at least one angular deviation (6), the linear drive (4) being arranged below or above the part that runs horizontally through the window frame profile (1), and applying force to at least one drawbar (5), and each drawbar (5) being in contact, in each case through at least an angular deviation (6), to at least one coupling bar (7), arranged vertically laterally in the window frame profile (1), - Each shaft (13) is assigned a drive pivot support (8) with a drive pivot (24) and a lever arm (9), where: - the lever arm (9) with a fixed end (18) is arranged without the possibility of rotation on the second front surface (15) of the shaft (13), and has an elongated hole (20), bent, which can be subdivided into a first arm (21), oriented radially with respect to the axis of rotation (12), a vertex (S) and a second arm (22), which is at a first angle (a), - the drive pivot support (8) has a fixed connection to the coupling bar (7), and the drive pivot (24) is arranged projecting into the elongated hole (20), so that the linear movement of the coupling rod (7), between an upper end position (O) and a lower end position (U), can be converted, through the drive pivot support (8), the drive pivot (24), the arm lever (9) and shaft (13), in a turning movement of the slat (2) between a closed position and an open position, and - the second arm (22) is then aligned in parallel with respect to the control bar. coupling (7), when the drive pin (24) is guided in the second arm (22) between the upper end position (O) and the vertex (S), - Each cam plate (10) has a fixed connection to one of the coupling rods (7) and in each cam plate (10) there is a slot (28), which is divided into two zones, a first being arranged zone (29) in parallel with respect to the coupling bar (7), and the second zone (30), adjacent, at a second angle (p) in the direction of the slat (2), where: - a ratchet (11) is assigned to each cam plate (10), where: - the pawl (11) is arranged without the possibility of rotation in the window frame profile (1), - the pawl (11) has a guide pin (32), which is arranged protruding in the groove (28) of the cam plate (10), and - a passage (33) is arranged in the window frame profile (1), and a notch (27) is present in the adjacent framed slat (2), - where the ratchet (11) protrudes, when the upper end position (O) is set, the guide pin (32) being arranged at the same time at the end of the second zone (30) of the slot (28) and all the drive pins (24) in the end zone of the second arm (22), as soon as the slats (2) have adopted the closed position, or - from which the ratchet (11) protrudes, when the guide pin (32) is in the first area (29) of the slot (28), - the guide pin (32) is in the second area (30) of the slot (28), only when the drive pin (24) is in the second arm (22) and the slat (2) is in the position closed. Arrangement according to claim 1, characterized in that a box-shaped insert is arranged in the recess (27) of the framed slat (2). Arrangement according to claims 1 or 2, characterized in that the first angle (a) has a value of Arrangement according to claims 1 to 3, characterized in that the second angle (p) has a value in the range greater than 90 °, less than 180 °, preferably a value of 135 °. Arrangement according to claims 1 to 4, characterized in that a radius (r) between the vertex (S) and the axis of rotation (12) is greater than a minimum distance (a) between the drive pin (24) and the rotation axis (12). Arrangement according to claims 1 to 5, characterized in that the trailing pivot support (8) is arranged in a positive connection on the window frame profile (1). Arrangement according to Claims 1 to 6, characterized in that plain bearings (25), for linear guidance of the coupling rod (7), are arranged in each case symmetrically relative to the rotary bearings (3). Arrangement according to claims 1 to 7, characterized in that , in the case of a slat construction with several slats (2), each slat (2) is arranged in contact with a coupling bar (7), both in the left side as well as right side, in each case through a lever arm (9) and a drive pin (24). Arrangement according to claims 1 to 8, characterized in that , for stability reasons, two connecting rods (7), connected to each other, are arranged on both sides of the window frame profile (1), which can be move simultaneously between their end positions (O and U) through a linear drive (4). Arrangement according to claims 1 to 9, characterized in that the second arm (22) of the elongated hole (20) has an elongated extension (23) of the elongated hole (20) in the end zone, by means of which a pressure force on the slat (2) after adopting the closed position.