Door closing linkage and door closing device with door closing linkage

Abstract

The invention relates to a door closing linkage (10) for a door closing device (100), comprising a door closing lever (1), a first coupling element (2) for coupling the door closing lever (1) to a door closer (20), and a second coupling element (3) for coupling the door closing lever (1) to a slide rail (30), wherein the door closing lever (1) has a first and a second coupling interface (1.1, 1.2) for connection to the first or the second coupling element (2, 3), wherein the two coupling interfaces (1.1, 1.2) of the door closing lever (1) are rotationally misaligned.

Description

[0001] 2024034 / EP dormakaba Deutschland GmbH 30.08.2024

[0002] Door closing linkage and door closing device with

[0003] Door closing linkage

[0004] The invention relates to a door closing linkage for a door closing device comprising a door closing lever, a first coupling element for coupling the door closing lever to a door closer, and a second coupling element for coupling the door closing lever to a slide rail, wherein the door closing lever has a first and a second coupling interface for connection to the first or the second coupling element. The invention further relates to a corresponding door closing device.

[0005] 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.

[0006] 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.

[0007] The door closing mechanism itself typically consists of a door closing lever and two coupling elements. The door closing lever is connected to the door closer via one coupling element and to the guide rail via the other. To connect the door closing lever to the two coupling elements, it has two coupling interfaces for each connection. Forces and torques can thus be transmitted between the door closer and the guide rail via the door closing lever.

[0008] While such door closer linkages have generally proven their worth in practice and are used in large numbers, well-known door closer linkages are comparatively inflexible and installation can be relatively complex, especially since the door closer, or rather the shaft of the door closer to be coupled with the coupling element, and the corresponding coupling element must be matched to each other. 2024034 / EP dormakaba Deutschland GmbH 30.08.2024

[0009] The invention therefore aims to provide a door closing linkage which is characterized by increased flexibility.

[0010] This task is solved in a door closing linkage of the type mentioned above by arranging the coupling interfaces of the door closing lever in a twisted position relative to each other.

[0011] This arrangement of the coupling interfaces results in a high degree of variability. The coupling elements can be connected to either of the two interfaces, allowing them to be rotated relative to each other. This means that a single door closer lever can achieve different coupling positions, adapting to various door closers, installation situations, and headroom depths, as will be explained in more detail below.

[0012] The term "coupling interfaces arranged in a twisted position relative to each other" means that the two coupling interfaces cannot be brought into alignment by an imaginary translational movement, but only by an additional rotation or twisting movement.

[0013] It is advantageous if the first and second coupling interfaces are arranged at an angle to the longitudinal axis of the door closer lever. This design allows for versatile use of the door closer lever and its compatibility with various 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.

[0014] The door closing lever can have a greater extension in one spatial direction than in the other spatial directions, and its longitudinal axis can extend accordingly in this spatial direction. Overall, the door closing lever can have an elongated, particularly flat-bar-shaped, geometry. Furthermore, the longitudinal axis of the door closing lever can coincide with the connecting axis of the centers of the first and second coupling interfaces.

[0015] With regard to the rotational offset of the coupling interfaces, it has proven advantageous if the coupling interfaces are arranged rotated relative to each other by an angle between 40 and 3 degrees, preferably between 20 and 6 degrees, particularly preferably between 15 and 8 degrees, and especially by 10 degrees. A rotational offset angle in these ranges has proven advantageous in practice with regard to various door closers. Accordingly, one of the two coupling interfaces must be rotated by this angle in order to then be brought into alignment with the other coupling interface by a translational movement. 2024034 / EP dormakaba Deutschland GmbH 30.08.2024

[0016] Furthermore, it has proven advantageous if the first and second coupling elements can be selectively positioned at either of the two coupling interfaces. Thus, one of the two coupling interfaces can be selected for the first coupling element, and the first coupling element can then be connected to the door closing lever via the selected interface. The second coupling element can be connected to the other coupling interface accordingly. Since both coupling elements can be selectively connected to either coupling interface, a high degree of flexibility is achieved. The coupling elements and the coupling interfaces can therefore be designed in such a way that they can be selectively connected to each other.

[0017] Furthermore, it has proven advantageous for the door closing lever to be designed as a changeover lever, which, due to the coupling interfaces being arranged at different angles relative to each other, allows for different coupling positions in various positions. A changeover lever is characterized by the fact that it enables different coupling positions in different orientations, so that an adjustment or adaptation can be achieved by changing the orientation of the changeover lever. The door closing lever can be rotated 180 degrees around its longitudinal axis and / or around a transverse axis arranged perpendicular to the longitudinal axis. Thus, the arrangement and orientation of at least one of the coupling interfaces can differ in the various coupling positions, so that a variable adjustment of the door closing lever to the guide rail and / or the door closer can be achieved by rotating the door closing lever.

[0018] In this context, it has also proven advantageous if, depending on the orientation of the door closer lever, different coupling positions result from the arrangement of the first coupling element in one of the two coupling interfaces. By selectively arranging the first coupling element in one of the two coupling interfaces, the rotation of the first coupling element can be varied. These different rotations then allow for correspondingly different coupling positions, enabling adaptation to various door closers or differently pre-twisted door closer shafts.

[0019] Regarding the coupling interfaces, it has proven advantageous for them to be congruent. This allows the coupling elements to be easily connected to one of the interfaces, and it is also simple to replace the coupling elements without further adjustments. Furthermore, the coupling interfaces can be the same size. This results in very simple adaptation on-site during assembly.

[0020] It has proven particularly advantageous if the coupling interfaces are designed as recesses. This design allows for easy connection to the coupling elements. The recesses can extend through the door closing lever, so that the coupling elements can be connected to the recesses from both sides, further improving overall adaptability. However, it is also possible for the recesses to be designed as blind holes, so that the coupling elements can only be connected to the recesses from one direction. (2024034 / EP dormakaba Deutschland GmbH 30.08.2024)

[0021] Regarding the connection of the coupling elements and the coupling interfaces, it has proven advantageous for the coupling elements to be pluggable into the coupling interfaces. This plug-in design allows the coupling elements to be connected to the coupling interfaces very easily and without the need for additional tools. This ensures a reliable connection capable of transmitting comparatively large forces and torques. To insert the coupling elements, they can be moved in a direction normal to the surface of the door closer, and thus perpendicular to the longitudinal axis of the door closer. Alternatively, the coupling elements can be designed to be clipped onto the coupling interfaces. In this case, the coupling interfaces can, for example, be designed as projections extending from the surface of the door closer in a direction normal to the surface.

[0022] Regarding the connection, it is also advantageous if the coupling elements are detachably connected to the door closing lever via the coupling interfaces. This not only simplifies assembly and disassembly, but the detachable connection also allows for easy adjustments or adaptations.

[0023] Furthermore, it has proven advantageous for the connection if the coupling elements can be positively connected to the coupling interfaces. A positive-locking connection allows for the transmission of sometimes high forces and torques, and there is no risk of slippage.

[0024] According to an advantageous embodiment of the invention, the coupling interfaces have a rectangular, in particular a square, cross-section. A rectangular cross-section allows for a simple form-fit connection and thus ensures reliable force and torque transmission. Besides a square cross-section, which can be advantageous from a manufacturing perspective, quadrilateral, pentagonal, hexagonal, or polygonal cross-sections can also be used. In particular, the coupling interfaces can also be designed as toothed connections. An overall non-circular cross-section can also be used. In this context, "cross-section" refers to a cross-section parallel to the surface of the door closing lever extending along its longitudinal axis.It is important that a positive-locking connection can be achieved and that relative movement between the coupling element and the coupling interface is reliably prevented. The corners of the coupling interfaces can also be rounded, which can offer advantages during assembly.

[0025] According to an advantageous embodiment of the invention, one of the coupling interfaces is arranged axially symmetrically to the longitudinal axis of the door closing lever. Due to the rotation of the two 2024034 / EP dormakaba Deutschland GmbH 30.08.2024

[0026] Advantageously, only one of the two coupling interfaces can be arranged symmetrically to the longitudinal axis of the door closing lever. This means the other coupling interface cannot be arranged symmetrically to the longitudinal axis. Due to this non-symmetrical arrangement, the coupling position can change when the door closing lever is rotated 180 degrees around its longitudinal axis.

[0027] With regard to the door closing lever, it can be designed to be symmetrical about its longitudinal axis without the two coupling interfaces. The two coupling interfaces can be arranged in opposite end regions of the door closing lever and be located at essentially the same distance from the ends of the door closing lever. The ends of the door closing lever can be rounded, which can simplify the overall handling of the door closing lever.

[0028] With regard to the coupling elements, it has proven advantageous for each element to have a connecting section designed to correspond to the coupling interfaces. The coupling elements can be connected to the coupling interfaces via this connecting section. Advantageously, the connecting sections are designed as projections that can engage positively in the coupling interfaces, which are designed as recesses. The connecting sections can thus be structurally adapted to the coupling interfaces. If the coupling interfaces are designed as projections, as explained above, the connecting sections can be designed accordingly as corresponding recesses.

[0029] For connection to the door closer and the guide rail, it has proven advantageous for each coupling element to have a coupling section. The coupling section of the first coupling element can be designed for coupling to the door closer, and the coupling section of the second coupling element for coupling to the guide rail. Thus, the door closer lever can be connected or coupled to the door closer on one side and to the guide rail on the other via the corresponding coupling sections. This can be a direct or an indirect coupling. Advantageously, the first coupling element is directly coupled to the door closer shaft via its coupling section, and the second coupling element is coupled via its coupling section to a guide block, which can then be guided in the guide rail. The guide block can, for example, be...The second coupling element can be connected to the coupling section via a screw. It can thus be guided indirectly via the sliding block in the slide rail.

[0030] With regard to the coupling section of the second coupling element, it has proven advantageous for it to be designed as a bore, particularly a cylindrical one. This design allows for a simple pivotable connection of the door closing lever to the slide rail. A cylindrical, and therefore point-symmetrical, bore has proven particularly advantageous in this respect. Due to the point-symmetrical bore, even a rotation of the coupling interface does not change the position of the 2024034 / EP dormakaba Deutschland GmbH 30.08.2024

[0031] Coupling section. This means that the rotation of the coupling interface can essentially be compensated for via the second coupling element.

[0032] From a structural point of view, the second coupling element can have a plate-like geometry and be essentially the same thickness as the door closer. When the second coupling element is inserted into the coupling interface, which is designed as a recess, it can be positioned within the contour of the door closer. The door closer can thus surround the second coupling element. The connecting section of the second coupling element can then be its outer circumferential surface. This connecting section can then extend through the second coupling element as a cylindrical bore.

[0033] With regard to the first coupling element, it has proven advantageous for the coupling section of the first coupling element to be designed as a polygonal recess. This design ensures a reliable positive-locking connection with the door closer and, in particular, allows for the transmission of higher torques from the door closer to the door closer lever. The door closer shaft can thus be inserted into the polygonal recess. The coupling section can be designed as a square or hexagonal recess. However, other geometries, such as a triangular, pentagonal, or octagonal shape, or a toothed geometry, are also possible. The crucial factor is that the design of the coupling section allows for a reliable positive-locking connection with the door closer or with a shaft of the door closer.The shaft of the door closer and the coupling section can be geometrically adapted to each other. If, for example, the coupling section is designed as a recess with a square or hexagonal cross-section, the shaft can be designed accordingly as a square or hexagonal shaft.

[0034] In an alternative design, the coupling section can also be configured as a polygonal projection. In this configuration, the door closer can have a corresponding polygonal recess into which the projection engages to create a positive-locking connection. Reference is made to the above descriptions regarding the design of the polygonal recess.

[0035] The first coupling element can be designed as a socket that can be inserted into the recess or coupling interface at one end via the connecting section and that can be attached to a shaft of the door closer at the other end. The coupling element thus enables a double positive-locking connection. The first coupling element can have a cylindrical geometry and a closed cylindrical surface circumferentially surrounding the coupling interface. The first coupling element can be axially symmetrical about a mounting axis and can be arranged along the mounting axis at one of the coupling interfaces or inserted into a recess of the door closer lever. The first coupling element can be optionally arranged at one of the coupling interfaces. 2024034 / EP dormakaba Deutschland GmbH 30.08.In 2024, as well as the possibility of varying the alignment of the coupling interfaces by rotating the door closing lever, the position of the coupling section of the coupling element also changes, thus allowing connection with different door closers or differently aligned door closer shafts.

[0036] With regard to the first coupling element, it has proven advantageous for it to have a bore through which it can be connected to the door closer by means of a screw. The screw can be screwed into the shaft of the door closer, and its head can rest on the top of the door closer lever at the opposite end. The door closer lever, the first coupling element, and the shaft or door closer can thus be held together axially with respect to the mounting axis and cannot move axially relative to each other.

[0037] According to a further development of the door closing mechanism, it has proven advantageous to provide a set consisting of at least two initial coupling elements of different lengths. These different lengths of coupling elements allow for further adjustment, particularly in cases of varying headroom or less-than-ideal installation situations. Therefore, a shorter coupling element (with respect to the mounting axis) or a correspondingly longer one can be used. This additional flexibility eliminates the need for sometimes expensive special closer variants with extended axes.

[0038] With regard to the aforementioned task, a method for using a door closing linkage is proposed, optionally employing a longer or a shorter first coupling element. The door closing linkage can be designed as described above.

[0039] 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.

[0040] 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 closing 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 closing 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 slide rail when the door is opened. The door closer can be a 2024034 / EP dormakaba Deutschland GmbH 30.08.2024.

[0041] Provide torque which preloads the door closing lever against the slide rail in such a way that the door closing lever exerts a closing torque on the door via the door closer.

[0042] 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.

[0043] Further details and advantages of the invention will be explained in more detail below with reference to the accompanying drawings. These show:

[0044] Fig. 1 shows a door closing linkage in a perspective side view;

[0045] Fig. 2 shows a door closing linkage according to Fig. 1 in an exploded view;

[0046] Fig. 3 shows a perspective exploded view of one end of a door closing lever with a first coupling element;

[0047] Fig. 4 shows a perspective exploded view of one end of a door closing lever with a second coupling element;

[0048] Fig. 5 shows a top view of the door locking lever in a first and a second coupling position;

[0049] Fig. 6 different views of a first coupling element;

[0050] Fig. 7 shows a cutaway side view through the first end of the door closing lever according to Fig. 1;

[0051] Fig. 8 shows a cutaway side view through the second end of the door closing lever according to Fig. 1;

[0052] Fig. 9 shows a schematic view of a door closing device.

[0053] Figure 9 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 30 is located on the inside of the door frame. Such an arrangement is usually provided for integrated door closers. It is also conceivable that the guide rail 20 is located above the door frame, as is the case, for example, with surface-mounted door closers or

[0054] is known for door drives.

[0055] The door closer 20 is coupled to the door closing lever 1 via a first coupling element 2, 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.

[0056] Figure 1 shows the door closing lever 1 in a perspective view. It has a flat, bar-like contour and features coupling interfaces 1.1 and 1.2, each designed as a recess, at both ends, as can also be seen in Figure 5. The coupling interfaces 1.1 and 1.2 have a rectangular cross-section, in the illustrated embodiment a square cross-section. Figure 5 shows the door closing lever 1 in a slightly foreshortened form. In particular, the coupling interfaces 1.1 and 1.2 can also have a polygonal cross-section, for example, a pentagonal or hexagonal cross-section, or be designed in the form of a toothed pattern.

[0057] To connect the door closing lever 1 to the door closer 20 on one side and to the slide rail 30 on the other, a coupling element 2, 3 is positively inserted into each of the two coupling interfaces 1.1, 1.2. This connection can also be seen in the illustrations of Figures 3 and 4.

[0058] The first coupling element 2 has a connecting section 2.1 on its side facing the door closing lever 1, which is designed as a square projection. The connecting section 2.1 corresponds to the coupling interfaces 1.1 and 1.2. The corresponding coupling element 2 can be positively inserted into one of the recesses of the door closing lever 1 via this square projection, so that the two elements are then not rotatable relative to each other and reliable torque transmission is ensured. The design of the connecting section 2.1 is also clearly visible in the various views of Fig. 6.

[0059] On the side opposite connecting section 2.1, the coupling element 2 has a coupling section 2.2 that allows a positive-locking connection with the shaft of the door closer 20. This coupling section 2.2 is designed as a square recess into which the square shaft of the door closer 20 can engage positively, so that the shaft of the door closer 20 is then rotaryally coupled to the door closing lever 1 via the coupling element 2. Overall, the first coupling element 2 is designed as a socket that is positively coupled to the door closing lever 1 on one side and positively coupled to the shaft of the door closer 20 on the other side. However, it is also provided that the coupling section 2.2 of the coupling element 2 can have a geometry deviating from the square and is designated as 2024034 / EP dormakaba Deutschland GmbH 30.08.2024

[0060] The coupling section 2.2 can be designed with multiple faces. For example, triangular, pentagonal, hexagonal, octagonal, or other geometries, as well as a toothed geometry, are possible. In any case, the geometry of the coupling section 2.2 corresponds to the geometry of the door closer shaft in order to enable a positive-locking connection.

[0061] As can be seen in Fig. 6, the first coupling element 2 has a bore 2.3 extending centrally through the first coupling element 2 along the mounting axis M. When the first coupling element 2 is inserted into the recess 1.1, the connecting section 2.1 is flush with the top surface of the door closer 1, so that the coupling element 2 does not protrude upwards relative to the door closer 1. This is also visible in the cutaway side view in Fig. 7. Furthermore, this illustration shows a connecting screw 4 that extends axially through the first coupling element 2 along the mounting axis M. The connecting screw 4 extends into the coupling section 2.2 and can be screwed into a thread (not shown) in the shaft of the door closer 20.The head of the connecting screw 4 can then rest on the top of the door closing lever 1, thus axially securing the door closing lever 1 together with the first coupling element 2 to the shaft of the door closer 20. The elements are then rotationally coupled to each other via the positive locking connection of the coupling element 2 and are also fixed axially via the connecting screw 4 and are not movable relative to each other.

[0062] The coupling element 2 can be supplied in different lengths relative to the mounting axis M. A set of coupling elements 2 of different lengths can be included with the door closing linkage upon delivery. This allows for bridging different door headroom depths.

[0063] The design of the second coupling element 3 is best seen in the illustration of Fig. 4. The second coupling element 3 is essentially plate-shaped, and its outer contour fits snugly into the coupling interface 1.2. Analogous to the connecting section 2.1 of the first coupling element 2, the second coupling element 3 also has a corresponding connecting section 3.1, which is designed to correspond to the coupling interfaces 1.2, and via which the second coupling element 3 is positively and therefore rotationally fixed to the door closing lever 1. The connecting section 3.1 is rectangular and approximately the same size as the coupling interface 1.2.

[0064] When the second coupling element 3 is inserted into the recess or coupling interface 1.2, it lies within the contour of the door closing lever 1 and does not protrude from it. This can also be seen in the illustration in Fig. 8. For connection to the slide rail 30, the coupling element 3 has a coupling section 3.2, which is designed as a circular, cylindrical bore. A sliding block can be connected to the door closing lever 1 via this coupling section 3.2, which is then guided in the slide rail 30. 2024034 / EP dormakaba Deutschland GmbH 30.08.2024

[0065] As can be seen in Fig. 5, the two coupling interfaces 1.1, 1.2 lie with their centers on the longitudinal axis L of the door closing lever 1 and are otherwise the same size. However, the two coupling interfaces 1.1, 1.2 differ in their orientation with respect to the longitudinal axis L, as they are arranged rotated relative to each other. The angle of rotation is approximately 10 degrees. Depending on the orientation of coupling interface 1.1, the orientation of the coupling section 2.2 of the first coupling element 2 also changes, since the coupling section 2.2 and the connecting section 2.1 are rigidly connected. The angle of rotation is specified as 10 degrees in this embodiment. However, it is also possible for the angle of rotation to have other values, such as angles between 40 and 3 degrees, preferably between 20 and 6 degrees, and particularly preferably between 15 and 8 degrees.

[0066] For example, if the coupling element 2 is inserted into the left coupling interface 1.1 as shown in Fig. 5, the coupling section 2.2 is oriented differently than if the coupling element 2 is inserted into the right coupling interface 1.2. This is because the orientation of the coupling section 2.2 changes according to the rotation of the coupling interfaces 1.1 and 1.2. That is, if the coupling interfaces 1.1 and 1.2 are rotated by 10 degrees, the coupling section 2.2 would also be rotated by 10 degrees when being switched between the two coupling interfaces 1.1 and 1.2.

[0067] The door closing lever 1 is designed as a changeover lever, which, due to the coupling interfaces 1.1, 1.2 being arranged rotated relative to each other, allows for different coupling positions Kl, K2 in different positions. The two illustrations in Fig. 5 show the same door closing lever 1 from two different sides. That is, the door closing lever 1 according to the upper illustration has been rotated 180 degrees about the longitudinal axis L compared to the lower illustration. This also changes the orientation of the right coupling interface 1.2, which is arranged rotated with respect to the longitudinal axis L. While this interface is rotated approximately 10 degrees clockwise in the upper illustration, the rotation of the door closing lever 1 results in the corresponding coupling interface 1.2 being rotated 10 degrees counterclockwise. Thus, by rotating the door closing lever 1 about the longitudinal axis L, a rotational offset of 20 degrees can be achieved on the side of the coupling section 2.2 is achieved when the corresponding coupling element 2 is inserted into the right coupling interface 1.2 from either one side of the door closing lever 1 or the other side of the door closing lever 1. The coupling interface 1.2 is arranged axially symmetrically to the longitudinal axis L of the door closing lever 1. The door closing lever 1 is thus arranged in two different coupling positions Kl, K2 in the illustrations of Fig. 5, which also results in the differently rotated coupling sections 2.2 of the first coupling element 2.

[0068] Furthermore, a third coupling position is also possible. The first coupling element 2 can also be inserted into the right-hand coupling interface 1.1. Since this coupling interface 1.1 is arranged symmetrically to the longitudinal axis L, a rotation of the door closing lever 1 around the mounting axis M does not change the orientation of the coupling interface 1.1 and therefore also not the coupling section 2.2 of the second coupling element 3. 2024034 / EP dormakaba Deutschland GmbH 30.08.2024

[0069] Depending on the orientation of the door closing lever 1 by the arrangement of the first coupling element 2 in one of the two coupling interfaces 1.1, 1.2, different coupling positions Kl, K2 result. Therefore, the illustrated door closing lever allows a total of three different coupling positions Kl, K2, each rotated by an angle of 10 degrees relative to the other.

[0070] Since the coupling section 3.2 of the second coupling element 3 is point-symmetrical, it is irrelevant for this coupling element 3 whether it is positioned in coupling interface 1.1 or coupling interface 1.2. The rotation or overall position of the door closing lever 1 is also irrelevant for the second coupling element 3. Therefore, the door closing lever 1 can initially be positioned so that the first coupling element 2 has the desired coupling position Kl, K2, or so that the coupling section 2.2 is aligned so that it can be connected to the shaft of the door closer 20. In a subsequent step, the second coupling element 3 can then be positioned in the remaining coupling interface 1.1, 1.2.

[0071] The first and second coupling elements 2, 3 can therefore be optionally arranged at either of the two coupling interfaces 1.1, 1.2. Overall, the variable arrangement of the first coupling element 2 in the different coupling positions Kl, K2 allows the door closing lever 1 to be adapted to different door closers 20, which not only permits the use of different door closers 20, but also simplifies assembly by adapting to different rotational starting positions of the door closer shaft 20.

[0072] 2024034 / EP dormakaba Deutschland GmbH 30.08.2024

[0073] REFERENCE MARK LIST

[0074] 1 Door locking lever

[0075] 1.1 First coupling interface

[0076] 1.2 second coupling interface

[0077] 2 first coupling element

[0078] 2.1 Connection section

[0079] 2.2 Coupling section

[0080] 2.3 Drilling

[0081] 3 second coupling element

[0082] 3.1 Connection section

[0083] 3.2 Coupling section

[0084] 4 connecting screws

[0085] 10 door closing rods

[0086] 20 door closers

[0087] 30 slide rail

[0088] 100 Door closing device

[0089] L Longitudinal axis

[0090] M assembly axis

[0091] KL coupling position

[0092] K2 coupling position

Claims

2024034 / EP dormakaba Deutschland GmbH 30.08.2024 PATENT CLAIMS 1. Door closing linkage for a door closing device (100) comprising a door closing lever (1), a first coupling element (2) for coupling the door closing lever (1) to a door closer (20) and a second coupling element (3) for coupling the door closing lever (1) to a slide rail (30), wherein the door closing lever (1) has a first and a second coupling interface (1.1, 1.2) for connection with the first or the second coupling element (2, 3), characterized in that the coupling interfaces (1.1, 1.2) of the door closing lever (1) are arranged rotated relative to each other.

2. Door closing linkage according to claim 1, characterized in that the first and the second coupling interface (1.1, 1.2) are arranged rotated with respect to the longitudinal axis (L) of the door closing lever 1.

3. Door closing linkage according to one of claims 1 or 2, characterized in that the coupling interfaces (1.1, 1.2) are arranged rotated relative to each other by an angle between 40 and 3 degrees, preferably between 20 and 6 degrees, particularly preferably between 15 and 8 degrees, in particular by 10 degrees.

4. Door closing linkage according to one of the preceding claims, characterized in that the first and / or second coupling element (2, 3) can be optionally arranged at one of the two coupling interfaces (1.1, 1.2).

5. Door closing linkage according to one of the preceding claims, characterized in that the door closing lever (1) is designed as a changeover lever which, due to the coupling interfaces (1.1, 1.2) being arranged rotated relative to each other, enables different coupling positions (Kl, K2) in different positions.

6. Door closing linkage according to one of the preceding claims, characterized in that, depending on the orientation of the door closing lever (1), different coupling positions (K1, K2) result from the arrangement of the first coupling element (2) in one of the two coupling interfaces (1.1, 1.2).

7. Door closing linkage according to one of the preceding claims, characterized in that the coupling interfaces (1.1, 1.2) are designed as recesses.

8. Door closing linkage according to one of the preceding claims, characterized in that the coupling elements (2, 3) can be inserted into the coupling interfaces (1.1, 1.2). 2024034 / EP dormakaba Deutschland GmbH 30.08.2024 9. Door closing linkage according to one of the preceding claims, characterized in that the coupling interfaces (1.1, 1.2) have a rectangular, in particular a square, cross-section.

10. Door closing linkage according to one of the preceding claims, characterized in that one of the coupling interfaces (1.1, 1.2) is arranged axially symmetric to the longitudinal axis (L) of the door closing lever (1).

11. Door closing linkage according to one of the preceding claims, characterized in that the coupling elements (2, 3) each have a connecting section (2.1, 3.1) designed corresponding to the coupling interfaces (1.1, 1.2) via which the coupling elements (2, 3) can be connected to the coupling interfaces (1.1, 1.2).

12. Door closing linkage according to one of the preceding claims, characterized in that the coupling elements (2, 3) each have a coupling section (2.2, 3.2), wherein the coupling section (2.2) of the first coupling element (2) is designed for coupling with the door closer (20) and the coupling section (3.2) of the second coupling element (3) is designed for coupling with the slide rail (30).

13. Door closing linkage according to claim 11, characterized in that the coupling section (3.2) of the second coupling element (3) is designed as a cylindrical bore.

14. Door closing linkage according to one of claims 11 or 12, characterized in that the coupling section (2.2) of the first coupling element (2) is designed as a polygonal recess.

15. Door closing linkage according to one of the preceding claims, characterized by a set of first coupling elements (2) 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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