Door closer linkage and door closer device with door closer linkage

Abstract

The invention relates to a door closing linkage (10) for a door closing device (100) with a door closing lever (1) and a coupling device (2) for coupling the door closing lever (1) with a door closer (20), wherein the coupling device (2) has a first coupling element (3) connectable to, in particular connected with, the door closing lever (1) and a second coupling element (4) connectable to the door closer (20), and wherein the first and the second coupling elements (3, 4) are connected to each other to enable torque transmission between the door closer (20) and the door closing lever (1), wherein the two coupling elements (3, 4) each have a coupling contour (3.1, 4.1) having several teeth (3.2, 4.2) via which the two coupling elements (3, 4) can be connected to each other in different mounting positions (M1, M2, M3, M4).

Description

[0001] The invention relates to a door closing linkage for a door closing device comprising a door closing lever and a coupling device for coupling the door closing lever to a door closer, wherein the coupling device has a first coupling element connectable to, in particular already connected to, the door closing lever and a second coupling element connectable to the door closer, and wherein the first and the second coupling elements are connected to each other to enable torque transmission between the door closer and the door closing lever. The invention further relates to a door closing device comprising a door closer, a door closing linkage, and a slide rail.

[0002] Door closers are used in both residential and industrial settings to close doors. These devices ensure that doors close automatically after being opened, preventing them from remaining open unintentionally. A typical application is fire doors, as these only provide fire protection when closed and therefore should generally only be opened briefly, remaining closed otherwise.

[0003] These door closing devices essentially consist of a door closer, which is located, for example, in the upper part of the door to be closed, a guide rail, which is located, for example, on the door frame side, and a door closing rod, which is coupled to the guide rail on one side and to the door closer on the other. The door closing rod is thus positioned between the guide rail and the door closer and ensures the transmission of the closing force provided by the door closer to the guide rail via the door closing rod.

[0004] The door closing mechanism itself typically consists of a door closing lever, which is coupled on one side to the door closer via a coupling device and on the other side to the guide rail, and through which the forces and torques from the door closer can be transmitted to the guide rail. It is known to use coupling devices with a two-part design, namely coupling devices consisting of a first coupling element that can be connected to the door closer and a second coupling element that is connected to the door closing lever.

[0005] Although such coupling devices or door closing rods have generally proven their worth in practice and are used in large numbers, known door closing rods are comparatively inflexible and installation can be comparatively complex, especially since the door closer or the shaft of the door closer to be coupled with the coupling device must be adapted to the position of the coupling device.

[0006] The invention therefore aims to provide a door closing linkage which is characterized by increased flexibility.

[0007] This task is solved in a door closing linkage of the type mentioned above by the fact that the two coupling elements have corresponding coupling contours designed to each other, via which the two coupling elements can be positively connected to each other in different mounting positions.

[0008] The ability to connect the two coupling contours or coupling elements in multiple mounting positions allows for variable adjustment between the door closer and the door closer lever. The door closer, or rather the position of its shaft, is thus independent of the door closer lever's position, eliminating the need to adjust the shaft before installation. Instead, the two coupling elements enable a variable connection that is largely independent of the door closer shaft's position. Furthermore, this variability allows for the use of different door closers. For the purposes of this disclosure, "door closer" includes door operators, integrated door closers, floor-mounted door closers, and frame door closers. The door closer linkage described herein is therefore explicitly suitable for such door closer devices.In particular, the door closing linkage is also suitable for use in scissor linkages.

[0009] The positive-locking connection between the two coupling elements ensures a reliable transmission of forces and torques, and there is no risk of the two coupling elements slipping. When the two coupling elements are connected, it is therefore not possible to rotate one of them relative to the other about the mounting axis (which will be explained in more detail below). Instead, the two coupling elements can only be rotated together as a connected unit about the mounting axis M for the transmission of forces and torques.

[0010] According to an advantageous embodiment of the invention, the two coupling contours each have several projections for a positive-locking connection. These projections allow the two coupling elements to be positively connected to one another, enabling the transmission of high forces and torques. The projections of one coupling contour can engage with the projections of the other coupling contour. This ensures a reliable force flow from one coupling element to the other. The forces can be distributed among the individual projections, so that each projection only has to transmit a fraction of the forces and torques. This coupling thus achieves both high variability and reliable stability for the transmission of high forces and torques.

[0011] From a design perspective, the projections can be shaped in such a way that the two coupling contours can interlock. The projections can thus be formed as teeth.

[0012] Regarding the connection of the two coupling elements, it has proven advantageous for them to be detachably connected. This detachable connection offers benefits during both assembly and disassembly. Furthermore, it allows for easy connection of the two coupling elements in various mounting positions, thus enabling very simple adaptation.

[0013] In this context, it has proven advantageous if the two coupling elements can be connected via a plug-in connection. This means that one coupling element can be plugged onto the other. The second coupling element, facing the door closer, can be designed as a socket that can be plugged onto the first coupling element. The first coupling element, facing the door closer lever, can be fixed in a fixed position and connected to the door closer lever. Adaptation can then be ensured by the variable connection between the two coupling elements. The second coupling element can thus function as an angle adapter, adapting different angular positions of the door closer or its shaft to the first coupling element and therefore to the door closer lever.

[0014] According to an advantageous embodiment of the invention, the two coupling elements can be connected to each other along a mounting axis. For assembly and disassembly, or for connecting and disconnecting the two coupling elements, they can thus be moved relative to each other in a linear direction along the mounting axis. The two coupling elements can be designed to be rotationally symmetrical about the mounting axis, so that the mounting axis represents a common axis of symmetry for both coupling elements. The second coupling element can be essentially cylindrical in geometry and have a cylindrical outer surface.

[0015] Furthermore, it has proven advantageous if the two coupling elements are arranged at different relative angles to each other around the mounting axis in the various mounting positions. The second coupling element can thus be aligned or rotated relative to the first coupling element in such a way that it can be coupled to the door closer. The two coupling elements can then be connected to each other in the manner described above, so that the door closer is connected to the door closing lever via the two coupling elements. In each mounting position, the second coupling element can therefore be rotated at a specific angle relative to the first coupling element. It can be provided that different door closers require correspondingly different rotation positions of the second coupling element, which are made possible by the variable connection of the two coupling elements.This means that the same coupling device can be used for different door closers.

[0016] Regarding the design of the coupling contour of a coupling element, particularly the first coupling element, it has proven advantageous for it to have several projections extending radially outwards. These projections can be arranged circumferentially and extend radially outwards with respect to the mounting axis. The corresponding coupling contour can thus be designed in the manner of a gear. Alternatively, the projections can also extend axially. Even with this design, the two coupling elements can be connected in various mounting positions, reliably transmitting forces and torques.

[0017] With regard to the design of the other coupling element, it has proven advantageous if this coupling element, particularly the second coupling element, has radially inwardly projecting projections. The projections of the two coupling elements can thus be designed to correspond with each other, enabling force and torque transmission via the projections. The number of projections on both coupling elements can be identical, resulting in a circumferentially homogeneous connection. If the projections of one coupling element extend axially, then the projections of the other coupling element can also extend axially, allowing the projections of the two coupling elements to engage with each other.

[0018] Furthermore, the number of protrusions can be highly important with regard to adaptation and different mounting positions. The more protrusions there are, the more precisely the two coupling elements can be rotated relative to each other. In other words, the number of protrusions determines the angle of symmetry, i.e., the angle by which the two coupling elements are rotated relative to each other before being connected. Therefore, it is not possible to connect the two coupling elements in arbitrary rotational positions; they can only be connected in discrete positions.

[0019] While multiple protrusions lead to greater variability, they also increase production and manufacturing costs. Furthermore, too many protrusions can sometimes lead to damage, especially if the forces and torques to be transmitted are not distributed evenly across all protrusions. This is because the more protrusions are used, the lower the load-bearing capacity of each individual protrusion. In practice, 15 or 18 protrusions have proven particularly effective. With 15 protrusions, the angle of symmetry is 24 degrees. This means the two coupling elements can be rotated relative to each other in 24-degree increments. With 18 protrusions, the angle of symmetry is 20 degrees, and the coupling elements can be rotated relative to each other in slightly smaller increments, namely by 20 degrees in each direction. The overall angle of symmetry is calculated using the formula: 360 divided by the number of protrusions.

[0020] The variable connection of the coupling elements ensures that the same components can be used for both left- and right-hinged doors. Furthermore, the coupling elements allow for the same variability and mounting positions in both door orientations, thus enabling adaptation not only to different door closers but also to different door orientations. The coupling elements can therefore be connected symmetrically with regard to the various mounting positions. This means that if the second coupling element can be rotated 20 degrees clockwise relative to the first coupling element and then connected to it, it can also be rotated 20 degrees counterclockwise and then connected to the first coupling element.

[0021] According to an advantageous embodiment of the invention, one of the coupling elements, in particular the first coupling element, is permanently connected to the door closing lever, in particular welded to it, and in particular formed monolithically as a single piece with the door closing lever. This permanent connection allows for the transmission of high forces and torques. The corresponding coupling element can be pre-connected to the door closing lever, in particular welded, and the second coupling element can be pre-connected to the door closer. Subsequently, the two coupling elements can then be connected to each other. Furthermore, it is also possible for the first coupling element to be formed integrally with the door closing lever, meaning that the two elements are monolithically formed from one material.

[0022] With regard to the connection to the door closer, it has proven advantageous if one of the coupling elements, particularly the second coupling element, has an interface for connection to the door closer. The corresponding coupling element can be rotaryally coupled to the door closer, especially to a shaft of the door closer, via this interface. A positive-locking connection has proven particularly advantageous, as it allows for the transmission of high forces and torques without the risk of slippage. Furthermore, it is also possible for the coupling element, particularly the second coupling element, to be an integral part of the door closer, or for this coupling element to be permanently and, in particular, integrally connected to the door closer or to the shaft of the door closer. In this case, a separate interface to the door closer would not be necessary.Nevertheless, even with this design, a variable connection can be ensured by the interlocking mechanism described above.

[0023] Regarding the arrangement of the interface, it has proven advantageous to position it on one side of the coupling element and the coupling contour on the other side. This design allows the coupling element to be connected to the other coupling element on one side and to the door closer on the opposite side. The interface can thus face the door closer, and the coupling contour can face the other coupling element or its coupling contour.

[0024] With regard to the interface, a polygonal design has proven advantageous. This design ensures a reliable, positive-locking connection with the door closer. The interface can be designed as a square or hexagonal interface. However, other geometries, such as triangular or pentagonal shapes, are also possible. The crucial factor is that the interface design allows for a reliable, positive-locking connection with the door closer and the transmission of torque. The interface can be designed as a insertion slot into which a door closer shaft can be inserted to connect the two elements via a rotary coupling. The shaft and the interface can be geometrically matched to each other.If the insertion opening has a square or hexagonal cross-section, the shaft can be designed accordingly as a square shaft or a hexagonal shaft.

[0025] In an alternative embodiment, however, the polygonal interface can also be designed like a shaft, which can engage with a corresponding interface of the door closer. In this respect, the embodiment described above can also be used in reverse to achieve a rotary coupling between the door closer or the shaft of the door closer and the coupling element.

[0026] According to a further advantageous embodiment, the interface has a symmetry angle that differs from that of the coupling contour. Specifically, the symmetry angle of the interface is larger than that of the coupling contour. This design ensures that the orientation or rotation angle of the interface changes accordingly when the two coupling contours are connected in different mounting positions. Advantageously, the interface is designed such that the number of sides of the interface is not a multiple of the number of projections. This significantly improves the variability. For example, if the interface is designed as a square interface and the coupling elements have 16 projections, this results in only three different positions of the interface and thus comparatively low variability.In this context, it is also provided that the ratio of the symmetry angle of the interface to the symmetry angle of the coupling contour is greater than 1, preferably greater than 3, particularly preferably greater than 9, and especially greater than 12. In this way, advantageous combinations with high variability can be created.

[0027] With regard to the two coupling elements, it is further advantageous if each coupling element has a through-hole so that the two coupling elements can be connected to each other by a screw. Advantageously, a screw can be screwed into a shaft of the door closer, extending through the two through-holes of the coupling elements. The head of the screw can rest on the top of the door closer lever, so that the two coupling elements are held together axially with respect to the mounting axis. The screw and the through-holes can be arranged concentrically to the mounting axis.

[0028] The door closer lever can be designed as a flat lever, thus requiring minimal space overall. Furthermore, it is advantageous if the door closer lever is connected to the guide rail at one end and to the door closer itself at the opposite end. In this way, the door closer lever can function as a lever arm for a rotary movement initiated by the door closer. The door closer lever can have a bore for connection to the first coupling element. This bore also allows the screw described above to extend through the bore in the door closer lever for connection to the door closer.

[0029] According to a further development of the door closing mechanism, it has proven advantageous to provide a set consisting of at least two secondary coupling elements of different lengths. These different lengths allow for further adjustment, particularly in cases of varying headroom or less-than-ideal installation situations. A shorter or a longer secondary coupling element can therefore be used as needed. This additional flexibility eliminates the need for sometimes expensive special closer variants with extended shafts.

[0030] Furthermore, the projections of the two coupling elements, due to their geometric extension in the direction of the mounting axis, can also allow a certain axial movement of the second coupling element relative to the first coupling element. This means that the second coupling element may not need to be pushed completely or all the way onto the first coupling element.

[0031] With regard to the aforementioned task, a method for using a door closing linkage is proposed, optionally employing a longer or a shorter second coupling element. The door closing linkage can be designed as described above.

[0032] Furthermore, with regard to the aforementioned task, a door closing device comprising a door closer, a door closing linkage, and a slide rail is proposed, wherein the door closing linkage is coupled to the door closer on one side and to the slide rail on the other. It is advantageous if the door closing linkage is designed in the manner described above.

[0033] The door closer can be located on the inside of the door, particularly in the upper area. The guide rail can be located in the upper area of ​​the inside of the door frame. Alternatively, the arrangement can be reversed. That is, the guide rail can be located in the upper area of ​​the inside of the door, and the door closer can be located on the frame side. The door closer and the guide rail can extend essentially horizontally and be arranged parallel to each other. The door closer lever can also extend essentially horizontally and, when the door is closed, can be located between the door closer and the guide rail. Furthermore, the door closer lever can be located above the door so that it does not obstruct opening the door, regardless of whether the door closer is located on the door or frame side.The door closer lever can be guided on one side in the slide rail and slide along the rail when the door is opened. The door closer can provide a torque that biases the door closer lever against the slide rail in such a way that the door closer lever exerts a closing torque on the door via the door closer.

[0034] The configurations described above, which relate to the first or the second coupling element, are not necessarily limited to that coupling element. Rather, the two coupling elements can also be configured or arranged in reverse. That is, it can be provided that the second coupling element is connected to the door closer lever in the manner described above, and that the first coupling element can be connected to the door closer and inserted into the first coupling element.

[0035] Further details and advantages of the invention will be explained in more detail below with reference to the accompanying drawings. These show: Fig. 1 a door closing linkage in a perspective side view; Fig. 2 an end of a door closing lever with a coupling device in an exploded view; Fig. 3 a side view of one end of a door closing lever with a first coupling element; Fig. 4 a second coupling element in various views; Fig. 5 a first coupling element in various views; Fig. 6 the two coupling elements in various mounting positions; Fig. 7 a cutaway side view through one end of a door closing lever according to Fig. 2 ; Fig. 8 a cutaway side exploded view according to Fig. 7 ; Fig. 9 a further embodiment of a second coupling element; Fig. 10 a schematic view of a door closing device.

[0036] The presentation of Fig. 10 Figure 1 shows a door closing device 100, which allows doors to close automatically. The door closing device 100 essentially consists of three elements: a door closer 20, a guide rail 30, and a door closing linkage 10, which is coupled to the door closer 20 on one side and to the guide rail 30 on the opposite side and includes a door closing lever 1. In the illustrated example, the door closer 20 is located in the upper area of ​​a door (not shown), and the guide rail is located on the inside of the door frame. This arrangement is usually found in integrated door closers. It is also conceivable that the guide rail could be located above the door frame, as is known, for example, from surface-mounted door closers or door operators.

[0037] The door closer 20 is coupled to the door closing lever 1 via the coupling device 2, which will be explained in more detail below, so that a torque can be applied to the door closing lever 1 via the door closer 20. Due to the connection of the door closer 20 to the guide rail 30, this torque can cause the door closer 20 to push or bias the door towards the guide rail 30, so that the door is moved into the closed position by the door closer 20 without any other force being applied. If the door is to be opened by a person, the force applied by the door closer 20 must therefore first be overcome.

[0038] The presentation of Fig. 1 Figure 1 now shows the door closing lever 1 in a perspective view. It has a flat, bar-shaped contour and features bores 1.1 and 1.2 at both ends, as shown in the illustrations of the Fig. 1 und 2 This is evident. The door closing lever 1 can be guided in the slide rail 30 via the bore 1.2 or by means of a sliding block, and in the area of ​​the bore 1.1 the door closing lever 1 is connected to the coupling device 2.

[0039] The coupling device 2 consists of two detachably connected coupling elements 3, 4, namely a first coupling element 3 which is connected to the door closing lever 1, and a second coupling element 4 which is connected to the first coupling element 3.

[0040] The presentation of Fig. 3 Figure 1 now shows the first coupling element 3 connected to the door closing lever 1. The design of the first coupling element 3 is also particularly evident from the illustration of the Fig. 5 The first coupling element 3 has a plate-shaped section that rests on the underside of the door closing lever 1 and is welded circumferentially or at least at specific points to the underside of the door closing lever 1. It is also conceivable that the first coupling element 3 is formed monolithically as a single piece with the door closing lever 1.

[0041] On the side facing away from the door closing lever 1, it has a coupling contour 3.1 with several projections 3.2, the projections 3.2 being designed as teeth. The coupling contour 3.1 is equipped with a total of 18 projections 3.2, evenly spaced around its circumference and projecting radially outwards with respect to the mounting axis M. Furthermore, the coupling element 3 is axially symmetrical with respect to the mounting axis M and has an internal bore that aligns with the bore 1.1 of the door closing lever 1. The mounting axis M thus extends both centrally through the bore 1.1 and through the first coupling element 3.

[0042] In a corresponding manner, the second coupling element 4 also has a coupling contour 4.1 with a total of 18 circumferentially arranged but radially inwardly projecting projections 4.2, as can be seen, for example, in the illustration of the Fig. 4 The figure, which shows the second coupling element 4 in various views, illustrates this. The projections 4.2 of the coupling contour 4.2 are also designed as teeth. The projections 3.2 and 4.2 are aligned so that they can engage with each other when the second coupling element 4 is placed onto the first coupling element 3 along the mounting axis M. Thus, the two coupling elements 3 and 4 can be positively connected to each other via the corresponding coupling contours 3.1 and 4.1.

[0043] The second coupling element 3 also has a bore or recess in its center, concentric to the mounting axis M, and is designed to be axially symmetrical with respect to the mounting axis M. The bores allow all elements—that is, the two coupling elements 3 and 4 and the door closer lever 1—to be connected to the door closer 20 along the mounting axis M using a single screw. The screw is not shown in the illustrations, but it can extend along the mounting axis M and be screwed into the shaft of the door closer 20, thus fixing the elements axially.

[0044] This position is shown in the representation of the Fig. 7 As shown in this figure, the second coupling element 4 circumferentially surrounds the first coupling element 3, and the projections 3.2 and 4.2 interlock, allowing forces or torques to be transmitted via this coupling from the second coupling element 4, through the first coupling element 3, to the door closing lever 1 and from there to the slide rail 30. The first coupling element 3 is then essentially no longer visible from the outside; only the cylindrical outer surface of the second coupling element 4 is apparent.

[0045] On the side opposite the coupling contour 4.1, the second coupling element 4 has an interface 4.3, which in the exemplary embodiment is designed as a polygonal interface in the form of a square recess. The interface 4.3 thus has four sides, each arranged at a right angle to one another. This angle can also be referred to as the angle of symmetry S1 and is shown in the illustration of the Fig. 4 This clarifies the point. The symmetry angle S1 of 90 degrees means that after a rotation of 90 degrees around the mounting axis M, interface 4.3 has assumed a position identical to the initial position.

[0046] Interface 4.3 is, for example, shown in the perspective view of the representation of the Fig. 4 This can be seen. The second coupling element 4 can be positively connected to the shaft of the door closer 20 via interface 4.3, so that torques can be reliably transmitted via this positive connection. The shaft (not shown) is accordingly designed as a square shaft and adapted to the size of interface 4.3, so that the sides of the square shaft lie as flat as possible against the sides of interface 4.3.

[0047] When the two coupling elements 3 and 4 are connected, the orientation of interface 4.3 is thereby determined. This means that the sides of the door closer shaft 20 and the sides of interface 4.3 must then be at least approximately aligned so that the shaft can be inserted into interface 4.3. However, this can lead to problems during installation, and adjusting the door closer shaft 20 is not always straightforward. Furthermore, different door closers 20 may have shafts with different orientations. Therefore, the two coupling elements 3 and 4 are not permanently connected; instead, the second coupling element 4 can be detachably attached to the first coupling element 3, as shown in the diagram. Fig. 2 and the Fig. 8 This is evident. The coupling contours 3.1, 4.1, each featuring multiple projections 3.2, 4.2, allow the two coupling elements 3, 4 to be connected not only in a single position, but also in various mounting positions M1, M2, M3, M4. This means that the second coupling element 4 can first be rotated relative to the first coupling element 4 about the mounting axis M and then attached to the first coupling element 3 in this rotated position. This variable connection ensures that the interface 4.3, and thus the shaft of the door closer 20, can be adapted to the door closer lever 1, and the orientation of the interface 4.3 can be varied almost arbitrarily.

[0048] With regard to variability, the only limits are determined by the division of the projections. That is, the number of projections 3.2, 4.2 essentially determines the angle by which the second coupling element 4 can be rotated to connect with the first coupling element 3. In the representation of the Fig. 6a A first assembly position M1 is now shown, which, with regard to the further Figuren 6b bis 6d This functions as the normal position. If the shaft of the door closer 20 can be easily connected to interface 4.3, no further adjustments are necessary.

[0049] However, if such a connection is not readily possible, the interface can be modified according to the Fig. 6b bis 6d to be filmed. The characters of Fig. 6a bis 6b The coupling device 2 is shown from below, so that the four sides of the interface 4.3 are visible. Since the two coupling contours 3.1, 4.1 each have 18 projections 3.2, 4.2, it is possible to connect the second coupling element 4 to the first coupling element in 20-degree increments. The symmetry angle S2 resulting from the number of projections or the number of teeth is also shown in the representation of the Fig. 4 This is illustrated. The dashed lines each run through the center or the assembly axis M and the tips of two adjacent projections 4.2.

[0050] Since the two coupling contours 3.1, 4.1 are regularly shaped circumferentially, the second coupling element 4 can be rotated clockwise and counterclockwise by a specific angle of symmetry S2 and then connected to the first coupling element 3. The representation of the Fig. 6b Figure 1 shows an assembly position M2 in which the second coupling element 4 has been rotated 20 degrees counterclockwise, and the illustration of the Fig. 6c shows the assembly position M3, in which the coupling element 4 is positioned starting from the position according to Fig. 6a was rotated 20 degrees clockwise. In the representation of the Fig. 6d The coupling element 4 was rotated by a further 20 degrees. As can be seen from a comparison of the representations of the Fig. 6a bis 6b As can be seen, the orientation of interface 4.3 also changes accordingly, thus enabling adaptation to differently oriented shafts of the door closer 20.

[0051] The presentation of Fig. 9Figure 4 shows a second coupling element 4 in a top view of the coupling contour 4.1 and the corresponding projections 4.2. This coupling element 4 differs from the coupling element 4 shown in the previous illustrations by having fewer projections. Specifically, this coupling element 4 has only 15 projections 4.2 instead of 18. The resulting angle of symmetry S2 is therefore 24 degrees, meaning that this coupling element 4 can be attached to the first coupling element 3 in 24-degree increments. Since the two coupling contours 3.1 and 4.1 of the coupling elements 3 and 4 are designed to correspond with each other in order to achieve reliable torque transmission, the first coupling element 3 also has 15 projections 3.2 instead of 18.

[0052] The symmetry angle S1 of the interface 4.3 is thus larger than the symmetry angle S2 of the coupling contour 4.1. It is also provided that the ratio of the symmetry angle S1 to the symmetry angle S2 is greater than 1, preferably greater than 3, particularly preferably greater than 9, and especially greater than 12.

[0053] Overall, the variable connection of the two coupling elements 3, 4 and the associated different mounting positions M1, M2, M3, M4 enable the door closing lever 1 to be adapted to different door closers 20, which not only allows the use of different door closers 20, but also facilitates the adaptation to different rotational starting positions of the shaft of the door closer 20. REFERENCE MARK LIST

[0054] 1 Door closing lever 1.1 Bore 1.2 Bore 2 Coupling device 3 First coupling element 3.1 Coupling contour 3.2 Projection 4 Second coupling element 4.1 Coupling contour 4.2 Projection 4.3 Interface 10 Door closing linkage 20 Door closer 30 Slide rail 100 Door closing device Mounting axis M1 Mounting position M2 Mounting position M3 Mounting position M4 Mounting position 51 Symmetry angle S2 Symmetry angle

Claims

1. Door closing linkage for a door closing device (100) comprising a door closing lever (1) and a coupling device (2) for coupling the door closing lever (1) to a door closer (20), wherein the coupling device (2) comprises a first coupling element (3) connectable to, preferably connected with, the door closing lever (1) and a second coupling element (4) connectable to the door closer (20), and wherein the first and the second coupling elements (3, 4) are connected to each other to enable torque transmission between the door closer (20) and the door closing lever (1), characterized by that the two coupling elements (3, 4) have corresponding coupling contours (3.1, 4.1) which allow the two coupling elements (3, 4) to be positively connected to each other in different assembly positions (M1, M2, M3, M4).

2. Door closing linkage according to claim 1, characterized by the fact thatThe two coupling contours (3.1, 4.1) each have several projections (3.2, 4.2) for a positive-locking connection.

3. Door closing linkage according to one of the preceding claims, characterized by the fact that the two coupling elements (3, 4) are detachably connected to each other.

4. Door closing linkage according to one of the preceding claims, characterized by the fact that one coupling element (4) can be plugged onto the other coupling element (3).

5. Door closing linkage according to any of the preceding claims, characterized by the fact that the two coupling elements (3, 4) can be connected to each other along a mounting axis (M).

6. Door closing linkage according to any of the preceding claims, characterized by the fact that the two coupling elements (3, 4) are arranged differently relative to each other around the mounting axis (M) in the different mounting positions (M1, M2, M3, M4).

7. Door closing linkage according to one of the preceding claims, characterized by the fact thatthe coupling contour (3.1) of a coupling element (3), in particular of the first coupling element (3), has several projections (3.2) extending radially outwards.

8. Door closing linkage according to any of the preceding claims, characterized by the fact that the coupling contour (4.1) of a coupling element (4), in particular of the second coupling element (4), has projections (4.2) that extend radially inwards.

9. Door closing linkage according to any of the preceding claims, characterized by the fact that one of the coupling elements (3), in particular the first coupling element (3), is inseparably connected to the door closing lever (1), in particular welded to it, in particular formed monolithically in one piece with the door closing lever (1).

10. Door closing linkage according to any of the preceding claims, characterized by the fact thatone of the coupling elements (4), in particular the second coupling element (4), has an interface (4.3) for connection with the door closer (20).

11. Door closing linkage according to claim 10, characterized by the fact that the interface (4.3) is located on one side of the coupling element (4) and the coupling contour (4.1) is located on the other side of the coupling element (4).

12. Door closing linkage according to one of claims 10 to 11, characterized by the fact that the interface (4.3) is designed as a polygonal interface.

13. Door closing linkage according to one of claims 10 to 12, characterized by the fact that the interface (4.3) has an angle of symmetry (S1) and the coupling contour (4.1) has an angle of symmetry (S2), wherein the angle of symmetry (S1) of the interface (4.3) differs from the angle of symmetry (S2) of the coupling contour (4.1), in particular that the angle of symmetry (S1) of the interface (4.3) is larger than the angle of symmetry (S2) of the coupling contour (4.1).

14. Door closing linkage according to one of claims 10 to 13, characterized by the fact that a ratio of the symmetry angle S1 to the symmetry angle S2 greater than 1, preferably greater than 3, particularly preferably greater than 9, particularly greater than 12.

15. Door closing linkage according to any of the preceding claims, characterized by a set of two coupling elements (4) of different lengths.

16. Door closing device comprising a door closer (20), a door closing linkage (10) and a slide rail (30), wherein the door closing linkage (10) is coupled to the door closer (20) on one side and to the slide rail (30) on the other side, wherein the door closing linkage (10) is configured according to one of the preceding claims.

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