COUPLING DEVICE

Description

Technical field

[0001] The invention relates to a coupling device for connecting two elements to be joined, each element having a groove on both sides undercut by at least one undercut and thus with at least two undercuts. This coupling device comprises a first clamping part and a second clamping part, and thus two clamping parts. For each of the two clamping parts, a longitudinal direction, a first direction oriented perpendicular to the longitudinal direction, a second direction oriented perpendicular to both the longitudinal direction and the first direction, a third direction oriented opposite to the first direction, and a fourth direction oriented opposite to the second direction are defined. The first clamping part has an effective surface, which effective surface is inclined to the longitudinal direction of the first clamping part.The second clamping element has an effective surface which is inclined to the longitudinal direction of the second clamping element. Furthermore, the first clamping element has a first projection arrangement projecting in the first direction of the first clamping element for engaging behind a first of the at least one undercut of the groove in a first of the two elements to be joined. In addition, the second clamping element has a first projection arrangement projecting in the first direction of the second clamping element for engaging behind a first of the at least one undercut of the groove in a second of the two elements to be joined. The I <opplungseinrichtung umfasst zudem eine Spanneinrichtung zum aufeinander zu Spannen der zwei Klemmteile im Wesentlichen entlang einer Längsachse der I<opplungs-einrichtung.In a combined state of the coupling device, the two clamping parts are each aligned with their longitudinal direction essentially along the longitudinal axis of the I <opplungseinrichtung ausgerichtet, während die erste Richtung des ersten Klemmteils und die erste Richtung des zweiten Klemmteils im Wesentlichen parallel zueinander ausgerichtet sind und die zweite Richtung des ersten Klemmteils und die zweite Richtung des zweiten Klemmteils im Wesentlichen parallel zueinander ausgerichtet sind, und die zwei Klemmteile je mit ihren Wirkflächen einander zugewandt hintereinander entlang der Längsachse angeordnet und durch die Spanneinrichtung entlang der Längsachse aufeinander zu spannbar oder aufeinander zu gespannt sind.When the clamping device clamps the two clamping parts towards each other along the longitudinal axis, the interaction of the working surfaces causes the first clamping part and the second clamping part to be pressed relative to each other in a direction transverse to the longitudinal axis of the coupling device, so that the first projection arrangement on the first clamping part and the first projection arrangement on the second clamping part are pressed towards each other. State of the art

[0002] US Patent 7,444,922 B shows such a coupling device for connecting two elements to be joined.

[0003] Coupling devices belonging to the aforementioned technical field are known. An example of such a coupling device is described in DE 203 17 404 U1 of DE-STA-CO Metallerzeugnisse GmbH.

[0004] Such known coupling devices make it possible to connect two elements to be joined, which each have a groove undercut on both sides with at least one undercut and thus with at least two undercuts, in a simple way: For this purpose, the two elements to be joined are aligned with their grooves parallel to each other and brought into contact with their grooves opposite each other, and the coupling device, in its assembled state, is inserted into the space formed by the opposing grooves with its longitudinal axis aligned parallel to the grooves and fixed in place by clamping the clamping device, which clamps the two clamping parts together along the longitudinal axis.Due to the interaction of the contact surfaces, the first clamping element and the second clamping element are pressed relative to each other in a direction transverse to the longitudinal axis of the coupling device, so that the first projection arrangement on the first clamping element and the first projection arrangement on the second clamping element are pressed towards each other. Since the coupling device is inserted into the space formed by the opposing grooves, the first projection arrangement on the first clamping element engages behind the first of the at least one undercut of the groove on one of the two elements to be joined, and the first projection arrangement on the second clamping element engages behind the first of the at least one undercut of the groove on a second of the two elements to be joined.Due to this interlocking action, the two elements to be joined are clamped together by pressing the first protrusion of the first clamping element and the second protrusion of the second clamping element towards each other. This clamping action connects the two elements.

[0005] Such I <opplungseinrichtungen haben den Nachteil, dass sie beim Verbinden von zwei zu verbindenden Elemente keine präzise Positionierung der beiden Elemente relativ zueinander sicherstellen. Falls die zwei zu verbindenden Elemente in eine Richtung quer zu den Nuten präzise zueinander positioniert miteinander verbunden werden sollen, so müssen die zwei Elemente zuerst korrekt zueinander positioniert werden und in dieser Positionierung gehalten werden, bis eine oder mehrere Kopplungseinrichtungen in den durch die sich gegenüberliegenden Nuten gebildeten Raum eingeführt und festgesetzt sind. Erst wenn die I<opplungseinrichtungen in die Nuten festgesetzt sind, kann aufgehört werden, die zwei nun verbundenen Elemente in der korrekten Positionierung zueinander zu halten. Daher ist die Verwendung von derartigen I<opplungseinrichtungen sehr aufwändig und umständlich.

[0006] An egg <opplungseinrichtung, welche zumindest bis zu einem gewissen Grad eine Positionierung der zwei miteinander zu verbindenden Elemente relativ zueinander in eine Richtung quer zu den Nuten erleichtert, ist in der EP 0 837 253 A1 der Festo AG & Co beschrieben. Bei dieser Kopplungseinrichtung weist eines der zwei Klemmteile rippenartige Zentriervorsprünge auf, welche sich an den Randabschnitten dieses Klemmteils unmittelbar neben der Spannfläche befinden, mit welcher Spannfläche die Hinterschnitte der Nut hintergriffen werden.

[0007] Such I <opplungseinrichtungen erleichtern zwar die Positionierung der zwei miteinander zu verbindenden Elemente relativ zueinander in eine Richtung quer zu den Nuten bis zu einem gewissen Grad. Sie haben aber immer noch den Nachteil, dass bei der Montage die zwei zu verbindenden Elemente in die Richtung quer zu den Nuten recht präzise zueinander positioniert werden und in dieser Positionierung gehalten werden müssen, bis die Spanneinrichtung gespannt und das jeweilige I<opplungselement festgesetzt ist. Zudem besteht bei solchen I<opplungseinrichtungen die Gefahr, dass durch die rippenartigen Zentriervorsprünge der Rand der Hinterschnitte der Nut gequetscht und damit beschädigt wird. Description of the invention

[0008] The object of the invention is to create a coupling device belonging to the aforementioned technical field which, when connecting the two elements to be joined, enables a correct positioning of the two elements to be joined in a direction transverse to the grooves in the two elements to be joined in a simple and reliable reproducible manner.

[0009] The solution to the problem is defined by the features of claim 1. According to the invention, a normal vector perpendicular to the effective surface of the first clamping element has both a component pointing in the first direction of the first clamping element and a component pointing in the second direction of the first clamping element, and a normal vector perpendicular to the effective surface of the second clamping element has both a component pointing in the third direction of the second clamping element and a component pointing in the fourth direction of the second clamping element.

[0010] The two elements that can be connected or are to be connected by the coupling device according to the invention each have a groove with at least one undercut. Preferably, the at least one undercut extends along the longitudinal direction of the respective groove. However, the two elements that can be connected or are to be connected by the coupling device according to the invention can also each have a groove with at least one undercut on both sides. That is, in this case, the grooves of the two connectable or connectable elements are undercut with at least two undercuts. Preferably, the at least two undercuts extend along both sides of the longitudinal direction of the respective groove.Grooves with a T-shaped or t-shaped cross-section are, for example, grooves undercut on both sides with an undercut each, in which the two undercuts run along the longitudinal direction of the respective groove on both sides.

[0011] According to the invention, the first clamping element has an effective surface which is inclined to the longitudinal direction of the first clamping element. Thus, the normal vector perpendicular to the effective surface of the first clamping element is not parallel to the longitudinal direction of the first clamping element, but has a component pointing in the longitudinal direction of the first clamping element. According to the invention, the second clamping element also has an effective surface which is inclined to the longitudinal direction of the second clamping element. Thus, the normal vector perpendicular to the effective surface of the second clamping element is not parallel to the longitudinal direction of the second clamping element, but has a component pointing in the longitudinal direction of the second clamping element.

[0012] According to the invention, the first clamping element has a first projection arrangement projecting in the first direction of the first clamping element for engaging behind a first of the at least one undercut of the groove in a first of the two elements to be connected. Furthermore, the second clamping element has a first projection arrangement projecting in the first direction of the second clamping element for engaging behind a first of the at least one undercut of the groove in a second of the two elements to be connected. The first projection arrangement of the first clamping element can comprise one or more projections. Likewise, the first projection arrangement of the second clamping element can comprise one or more projections. Such a projection of a first projection arrangement can have any length along the longitudinal direction of the clamping element to which the projection arrangement belongs.Such a projection can extend longitudinally along the entire length of the respective clamping element. However, it can also extend longitudinally along only a section of the respective clamping element.

[0013] If the first projection arrangement of the first clamping part comprises two or more projections, then these projections are preferably arranged successively along the longitudinal direction of the first clamping part so that all projections of the first projection arrangement of the first clamping part are designed to engage behind the same of the at least one undercut of the groove in the first of the two elements to be joined when the coupling device is inserted into the space formed by the opposing grooves in order to join the two elements to be joined.

[0014] If the first projection arrangement of the second clamping part comprises two or more projections, then these projections are preferably arranged one after the other along the longitudinal direction of the second clamping part so that all projections of the first projection arrangement of the second clamping part are designed to engage behind the same of the at least one undercut of the groove in the second of the two elements to be joined when the coupling device is inserted into the space formed by the opposing grooves in order to join the two elements to be joined.

[0015] According to the invention, when the clamping device clamps the two clamping parts towards each other along the longitudinal axis, the interaction of the working surfaces causes the first clamping part and the second clamping part to be pressed relative to each other in a direction transverse to the longitudinal axis of the coupling device and, in particular, to be moved at least slightly, so that the first projection arrangement arranged on the first clamping part and the first projection arrangement arranged on the second clamping part are pressed towards each other. Thus, due to the interaction of the working surfaces of the two clamping parts, one of the two clamping parts is pressed in a direction which has a component pointing in the fourth direction of this one clamping part, while the other of the two clamping parts is pressed in a direction which has a component pointing in the second direction of this other clamping part.More precisely, the first clamping element is pressed in a direction which direction has a component pointing in the fourth direction of the first clamping element, because the normal vector perpendicular to the effective surface of the first clamping element has a component pointing in the second direction of the first clamping element, while the second clamping element is pressed in a direction which direction has a component pointing in the second direction of the first clamping element, because the normal vector perpendicular to the effective surface of the second clamping element has a component pointing in the fourth direction of the second clamping element.

[0016] By means of the interaction of the working surfaces, the first clamping part and the second clamping part are pressed relative to each other in a direction transverse to the longitudinal axis of the coupling device, so that the first projection arrangement arranged on the first clamping part and the first projection arrangement arranged on the second clamping part are pressed towards each other, when the two elements to be connected are aligned with their grooves parallel to each other and brought into contact with their grooves opposite each other,The coupling device, in its assembled state, is inserted into the space formed by the opposing grooves with its longitudinal axis aligned parallel to the grooves, and the first projection arrangement on the first clamping part engages behind the first of at least one undercut of the groove on one of the two elements to be joined, and the first projection arrangement on the second clamping part engages behind the first of at least one undercut of the groove on a second of the two elements to be joined, connects the two elements to be joined by clamping them together. That is, when the clamping device clamps the two clamping parts towards each other along their longitudinal axis, the interaction of the working surfaces causes the first clamping part and the second clamping part to be clamped relative to each other in the direction transverse to the longitudinal axis. <opplungseinrichtung gedrückt,so that the first projection arrangement arranged on the first clamping part and the first projection arrangement arranged on the second clamping part are pressed towards each other, in particular so that, when the two elements to be joined are aligned with their grooves parallel to each other and brought into contact with their grooves opposite each other, the coupling device in the assembled state is inserted into the space formed by the opposing grooves with its longitudinal axis aligned parallel to the grooves, and the first projection arrangement arranged on the first clamping part engages behind the first of the at least one undercut of the groove on a first of the two elements to be joined, and the first projection arrangement arranged on the second clamping part engages behind the first of the at least one undercut of the groove on a second of the two elements to be joined.to join the two elements by clamping them together.

[0017] According to the invention, the normal vector perpendicular to the effective surface of the first clamping part has both a component pointing in the first direction of the first clamping part and a component pointing in the second direction of the first clamping part, while the normal vector perpendicular to the effective surface of the second clamping part has both a component pointing in the third direction of the second clamping part and a component pointing in the fourth direction of the second clamping part.Since the effective surface of the first clamping element is also inclined to the longitudinal direction of the first clamping element, and the effective surface of the second clamping element is also inclined to the longitudinal direction of the second clamping element, this results in the following: when the clamping device clamps the two clamping elements towards each other along the longitudinal axis, the interaction of the effective surfaces causes the first clamping element to be pressed relative to the second clamping element in a direction which has a component directed in both the third direction and the fourth direction of the first clamping element, while the second clamping element is pressed relative to the first clamping element in a direction which has a component directed in both the first direction and the second direction of the second clamping element.Therefore, as already described, the first projection arrangement on the first clamping element and the first projection arrangement on the second clamping element are pressed towards each other. More precisely, this causes the first projection arrangement on the first clamping element and the first projection arrangement on the second clamping element to be pressed towards each other in an approach direction, which approach direction has a component along an axis defined by the second and fourth directions of the two clamping elements. This approach direction also has a component along an axis defined by the first and third directions of the two clamping elements.Along this axis, defined by the first and third directions of the two clamping parts, the first and second clamping parts are forced apart, so that the two clamping parts lock laterally against the two edges of the groove in the first element to be joined and against the edges of the groove in the second element to be joined. This ensures that when the clamping device is tightened, the two elements are not only clamped together, but also positioned precisely and reproducibly relative to each other in a direction transverse to the grooves.

[0018] Accordingly, the coupling device according to the invention enables the correct positioning of the two elements to be joined in a simple, reliable, and reproducible manner in a direction transverse to the grooves in the two elements to be joined. For this purpose, it is sufficient to align the two elements to be joined with their grooves parallel to each other and to bring their grooves into contact opposite each other, such that the space formed by the opposing grooves is sufficiently large for the insertion of the coupling device in its assembled state, provided that the coupling device is aligned with its longitudinal axis parallel to the grooves.Subsequently, one or more inventive I <opplungseinrichtungen im zusammengesetzten Zustand mit ihrer Längsachse parallel zu den Nuten ausgerichtet in den durch die sich gegenüberliegenden Nuten gebildeten Raum eingeführt und durch Spannen der Spanneinrichtung(en) der einen oder mehreren I<opplungseinrichtungen festgesetzt werden. Dabei erlaubt die erfindungsgemässe Kopplungseinrichtung viel Toleranz bezüglich der Präzision, mit welcher die zwei zu verbindenden Elemente mit ihren Nuten parallel zueinander ausgerichtet und mit ihren Nuten sich gegenüberliegend in Kontakt gebracht werden müssen, da es ausreicht, wenn der durch die sich gegenüberliegenden Nuten gebildete Raum ausreichend gross für das Einführen der Kopplungseinrichtung bzw. der I<opplungseinrichtungen ist.As soon as one or more inventive components are present <opplungseinrichtungen in diesen Raum eingeführt sind, müssen die zwei zu verbindenden Elemente nicht mehr länger zueinander positioniert gehalten werden und müssen auch gar nicht noch präziser relativ zueinander positioniert werden. Vielmehr reicht es aus, wenn nun die Spanneinrichtung(en) der einen oder mehreren eingesetzten I<opplungseinrichtungen gespannt wird bzw. werden, um die zwei zu verbindenden Elemente korrekt und präzise zueinander zu positionieren und miteinander zu verbinden.

[0019] Therefore, to connect the two elements to be joined, it is advantageous, when the two elements to be joined are aligned with their grooves parallel to each other and brought into contact with their grooves opposite each other, that the coupling device, in its assembled state, can be inserted into the space formed by the opposing grooves with its longitudinal axis aligned parallel to the grooves, so that the first projection of the first clamping part engages behind the first of the at least one undercut of the groove in the first of the two elements to be joined, and the first projection of the second clamping part engages behind the first of the at least one undercut of the groove in the second of the two elements to be joined, after which the clamping device can clamp the two clamping parts towards each other with their working surfaces essentially along the longitudinal axis.The interaction of the contact surfaces causes the two clamping parts to be pressed relative to each other in a direction transverse to the longitudinal axis of the coupling device, so that the first projection arrangement on the first clamping part and the first projection arrangement on the second clamping part are pressed towards each other. This, in turn, causes the first of the at least one undercut of the groove in the first of the two elements to be joined and the first of the at least one undercut of the groove in the second of the two elements to be joined to be pressed towards each other by clamping the two elements to be joined. Advantageously, the direction is transverse to the longitudinal axis of the coupling device. <opplungseinrichtung,in which direction the two clamping parts are pressed relative to each other due to the interaction of the working surfaces, and furthermore aligned in such a way that the first clamping part and the second clamping part are also pressed apart along an axis defined by the first direction and the third direction of the two clamping parts, so that the two clamping parts lock laterally at the two edges of the groove in the first element to be joined and at the edges of the groove in the second element to be joined, in order to correctly position the two elements to be joined in a direction transverse to the grooves in the two elements to be joined.

[0020] Advantageously, in the first clamping element, the angle between the effective surface and the first direction, measured in a plane defined by the longitudinal direction and the first direction, is at least 30°. Furthermore, in the first clamping element, the angle between the effective surface and the second direction, measured in a plane defined by the longitudinal direction and the second direction, is advantageously at least 30°. Additionally, in the second clamping element, the angle between the effective surface and the third direction, measured in a plane defined by the longitudinal direction and the third direction, is advantageously at least 30°. Finally, in the second clamping element, the angle between the effective surface and the fourth direction, measured in a plane defined by the longitudinal direction and the fourth direction, is advantageously at least 30°.This has the advantage that when connecting the two elements to be joined, a comparatively low I is required to clamp the clamping device. <raft ausreicht, um die zwei zu verbindenden Elemente fest miteinander zu verbinden.

[0021] Advantageously, in the first clamping element, the angle between the effective surface and the first direction, measured in the plane defined by the longitudinal direction and the first direction, is at most 60°. Furthermore, in the first clamping element, the angle between the effective surface and the second direction, measured in the plane defined by the longitudinal direction and the second direction, is advantageously at most 60°. Additionally, in the second clamping element, the angle between the effective surface and the third direction, measured in the plane defined by the longitudinal direction and the third direction, is advantageously at most 60°. Moreover, in the second clamping element, the angle between the effective surface and the fourth direction, measured in the plane defined by the longitudinal direction and the fourth direction, is at most 60°.This has the advantage that the effective surface of the first clamping element is not too steeply inclined to its longitudinal direction, and that the effective surface of the second clamping element is not too steeply inclined to its longitudinal direction, allowing the two clamping elements to be designed to be comparatively short along their longitudinal directions. This, in turn, means that the entire coupling device can also be designed to be comparatively short and correspondingly compact when measured along its longitudinal axis.

[0022] Particularly preferably, in the first clamping part, the angle between the effective surface and the first direction, measured in the plane spanned by the longitudinal direction and the first direction, is approximately 45°, while in the first clamping part, the angle between the effective surface and the second direction, measured in the plane spanned by the longitudinal direction and the second direction, is approximately 45°, while in the second clamping part, the angle between the effective surface and the third direction, measured in the plane spanned by the longitudinal direction and the third direction, is approximately 45°, and while in the second clamping part, the angle between the effective surface and the fourth direction, measured in the plane spanned by the longitudinal direction and the fourth direction, is approximately 45°.This has the advantage that the coupling device can be designed to be short when measured along its longitudinal axis, and at the same time, a low I is required when connecting the two elements to be joined. <raft zum Spannen der Spanneinrichtung ausreicht, um die zwei zu verbindenden Elemente fest miteinander zu verbinden.

[0023] Alternatively to these options, it is also possible that, in the case of the first clamping element, the angle between the effective surface and the first direction, measured in the plane defined by the longitudinal direction and the first direction, is less than 30° or more than 60°. Similarly, it is also possible that, in the case of the first clamping element, the angle between the effective surface and the second direction, measured in the plane defined by the longitudinal direction and the second direction, is less than 30° or more than 60°. Likewise, it is also possible that, in the case of the second clamping element, the angle between the effective surface and the third direction, measured in the plane defined by the longitudinal direction and the third direction, is less than 30° or more than 60°.Similarly, it is also possible that in the second clamping part, the angle measured in the plane spanned by the longitudinal direction and the fourth direction between the effective surface and the fourth direction is less than 30° or more than 60°.

[0024] Preferably, the first projection arrangement of the first clamping part is arranged on a half of the first clamping part lying in the second direction of the first clamping part, and the first projection arrangement of the second clamping part is arranged on a half of the second clamping part lying in the fourth direction of the second clamping part.This results in the two clamping parts being in the assembled state of the I <opplungseinrichtung, wenn die Spanneinrichtung nicht gespannt ist und die zwei Klemmteile somit nicht entlang der Längsachse aufeinander zu gespannt sind, mit ihren Wirkflächen im Wesentlichen vollständig aufeinanderliegend angeordnet werden können, während sich die erste Vorsprunganordnung des ersten Klemmteils von der ersten Vorsprunganordnung des zweiten Klemmteils aus gesehen in der zweiten Richtung des zweiten Klemmteils befindet, während sich die erste Vorsprunganordnung des zweiten Klemmteils von der ersten Vorsprunganordnung des ersten Klemmteils aus gesehen in der vierten Richtung des ersten Klemmteils befindet.When the clamping device is subsequently tightened in order to clamp the two clamping parts together along the longitudinal axis and, due to the interaction of the effective surfaces, to press the first clamping part and the second clamping part relative to each other in a direction transverse to the longitudinal axis of the coupling device, the first projection arrangement arranged on the first clamping part and the first projection arrangement arranged on the second clamping part are pressed towards each other.Since the two clamping parts can first be arranged with their working surfaces essentially completely overlapping in the relaxed state of the clamping device as explained, this arrangement of the first projection arrangements on each of the two clamping parts has the advantage that the two clamping parts can be very stably supported against each other with their working surfaces, so that the coupling device functions very reliably and stably and thus enables a very reliable and stable connection of two elements to be joined with the corresponding grooves.

[0025] Advantageously, the first projection of the first clamping element, viewed longitudinally, forms a projection in a region at the first end of the first clamping element opposite its effective surface, for engaging behind the first of the at least one undercut of the groove in the first of the two elements to be joined. Furthermore, advantageously, the first projection of the second clamping element, viewed longitudinally, forms a projection in a region at the first end of the second clamping element opposite its effective surface, for engaging behind the first of the at least one undercut of the groove in the second of the two elements to be joined.Since the first end of each of the two clamping elements, viewed longitudinally, faces the effective surface of the respective clamping element, the first end of the first clamping element and the second end of the second clamping element are oriented away from each other when the coupling device is assembled. This achieves the advantage that the coupling device enables a stable and therefore reliable connection of the two elements to be joined.

[0026] Regardless of whether the first projections of the two clamping elements each form a projection in the region of the first end of the respective clamping element or not, the first projection of the first clamping element advantageously forms a projection in the region of the effective surface of the first clamping element for engaging behind the first of the at least one undercut of the groove in the first of the two elements to be joined, while the first projection of the second clamping element advantageously forms a projection in the region of the effective surface of the second clamping element for engaging behind the first of the at least one undercut of the groove in the second of the two elements to be joined. This has the advantage that, when joining the two elements to be joined, comparatively large [missing information] of the two clamping elements [missing information]. <räfte aufgenommen werden können, da die Vorsprünge und die Wirkflächen sehr nahe beieinander angeordnet sind.

[0027] Furthermore, if the first projections of the two clamping elements each form a projection in the region of the first end of the respective clamping element, the additional advantage is achieved that the coupling device enables a particularly stable and therefore reliable connection of the two elements to be joined. It is irrelevant whether the projection of the first projection arranged in the region of the first end of the respective clamping element and the projection of the first projection arranged in the region of the effective surface of the respective clamping element are designed as a continuous projection extending along the longitudinal direction of the respective clamping element, or whether the projection of the first projection arranged in the region of the first end of the respective clamping element and the projection of the first projection arranged in the region of the effective surface of the respective clamping element are designed as two separate projections.In the first case, the respective first step arrangement comprises only one step, whereas in the second case, the respective first step arrangement has at least two steps.

[0028] According to the invention, the coupling device is suitable for connecting two elements to be joined, each of which has a groove undercut on both sides by at least one undercut and thus by at least two undercuts. Advantageously, the first clamping part has a second projection arrangement extending in the third direction of the first clamping part, and the second clamping part has a second projection arrangement extending in the third direction of the second clamping part. In a first embodiment, the second projection arrangement of the first clamping part serves to engage behind a second of the at least two undercuts of the groove in the first of the two elements to be joined, while the second projection arrangement of the second clamping part serves to engage behind a second of the at least two undercuts of the groove in the second of the two elements to be joined.In an alternative to the first variant, the second projection of the first clamping element engages behind a second of the at least two undercuts of the groove in the second of the two elements to be joined, while the second projection of the second clamping element engages behind a second of the at least two undercuts of the groove in the first of the two elements to be joined. Both variants offer the advantage that the coupling device enables a particularly reliable connection of the two elements to be joined via the corresponding grooves.

[0029] Advantageously, the second projection of the first clamping element, viewed longitudinally, forms a projection in the region of the first end of the first clamping element opposite the effective surface of the first clamping element, for engaging behind the second of the at least two undercuts of the groove in the first of the two elements to be joined, or for engaging behind the second of the at least two undercuts of the groove in the second of the two elements to be joined. Furthermore, advantageously, the second projection of the second clamping element, viewed longitudinally, forms a projection in the region of the first end of the second clamping element opposite the effective surface of the second clamping element, for engaging behind the second of the at least two undercuts of the groove in the second of the two elements to be joined, or for engaging behind the second of the at least two undercuts of the groove in the first of the two elements to be joined.Since, in the case of the two clamping parts, the first end of each clamping part, viewed in the longitudinal direction of the respective clamping part, is opposite the effective surface of the respective clamping part, in the assembled state of the I <opplungseinrichtung das erste Ende des ersten Klemmteils und das zweite Ende des zweiten Klemmteils voneinander abgewandt. Daher wird der Vorteil erreicht, dass die I<opplungseinrichtung ein stabiles und damit zuverlässiges Verbinden der zwei zu verbindenden Elemente ermöglicht.

[0030] Regardless of whether the second projection arrangements of the two clamping parts each form a projection in the region of the first end of the respective clamping part or not, the second projection arrangement of the first clamping part advantageously forms a projection in the region of the effective surface of the first clamping part for engaging behind the second of the at least two undercuts of the groove in the first of the two elements to be joined or for engaging behind the second of the at least two undercuts of the groove in the second of the two elements to be joined, while the second projection arrangement of the second clamping part advantageously forms a projection in the region of the effective surface of the second clamping part for engaging behind the second of the at least one undercut of the groove in the second of the two elements to be joined or for engaging behind the second of the at least one undercut of the groove in the first of the two elements to be joined.This has the advantage that when connecting the two elements to be joined, comparatively large I <räfte aufgenommen werden können, da die Vorsprünge und die Wirkflächen sehr nahe beieinander angeordnet sind.

[0031] Furthermore, if the second projection arrangements of the two clamping elements each form a projection in the region of the first end of the respective clamping element, the additional advantage is achieved that the coupling device enables a particularly stable and therefore reliable connection of the two elements to be joined. It is irrelevant whether the projection of the second projection arrangement located in the region of the first end of the respective clamping element and the projection of the second projection arrangement located in the region of the effective surface of the respective clamping element are designed as a continuous projection extending along the longitudinal direction of the respective clamping element, or whether the projection of the second projection arrangement located in the region of the first end of the respective clamping element and the projection of the second projection arrangement located in the region of the effective surface of the respective clamping element are designed as two separate projections.In the first case, the respective second arrangement of protrusions comprises only one protrusion, whereas in the second case, the respective second arrangement of protrusions has at least two protrusions.

[0032] In the aforementioned first variant, in which the second projection arrangement of the first clamping part serves to engage behind the second of the at least two undercuts of the groove in the first of the two elements to be joined, while the second projection arrangement of the second clamping part serves to engage behind the second of the at least two undercuts of the groove in the second of the two elements to be joined, the second projection arrangement of the first clamping part is advantageously arranged on the first clamping part extending from the first projection arrangement of the first clamping part in the third direction of the first clamping part, and the second projection arrangement of the second clamping part is advantageously arranged on the second clamping part extending from the first projection arrangement of the second clamping part in the third direction of the second clamping part.This leads to the fact that in the composite state of I <opplungseinrichtung, wenn durch die Spanneinrichtung die zwei Klemmteile entlang der Längsachse aufeinander zu gespannt werden, aufgrund des Zusammenwirkens der Wirkflächen das erste Klemmteil und das zweite Klemmteil relativ zueinander in eine Richtung quer zur Längsachse der Kopplungseinrichtung gedrückt werden, sodass nicht nur die am ersten Klemmteil angeordnete erste Vorsprunganordnung und die am zweiten Klemmteil angeordnete erste Vorsprunganordnung zueinander hin gedrückt werden, sondern sodass auch die am ersten Klemmteil angeordnete zweite Vorsprunganordnung und die am zweiten Klemmteil angeordnete zweite Vorsprunganordnung zueinander hin gedrückt werden.This has the advantage that the first and second projections of the first clamping element allow the first of the two elements to be joined to be engaged from behind on both sides of the groove at the respective undercut, while the first and second projections of the second clamping element allow the second of the two elements to be joined to be engaged from behind on both sides of the groove at the respective undercut. Accordingly, the two elements to be joined can be drawn evenly towards each other by the coupling device when the clamping device tightens the two clamping elements towards each other along their longitudinal axis. This results in a very uniform and therefore stable connection of the two elements to be joined using the coupling device.

[0033] In this variant, the two clamping parts can, for example, be designed with a T-shaped or t-shaped cross-section that runs perpendicular to the longitudinal direction of the respective clamping part.

[0034] If the second projection arrangement of the first clamping part is arranged on the first clamping part extending from the first projection arrangement of the first clamping part in the third direction of the first clamping part, and the second projection arrangement of the second clamping part is arranged on the second clamping part extending from the first projection arrangement of the second clamping part in the third direction of the second clamping part, then the second projection arrangement of the first clamping part is advantageously arranged on the half of the first clamping part lying in the second direction of the first clamping part, and the second projection arrangement of the second clamping part is arranged on the half of the second clamping part lying in the fourth direction of the second clamping part.This results in the two clamping parts being in the assembled state of the I <opplungseinrichtung, wenn die Spanneinrichtung nicht gespannt ist und die zwei Klemmteile somit nicht entlang der Längsachse aufeinander zu gespannt sind, mit ihren Wirkflächen im Wesentlichen vollständig aufeinanderliegend angeordnet werden können, während sich die zweite Vorsprunganordnung des ersten Klemmteils von der zweiten Vorsprunganordnung des zweiten Klemmteils aus gesehen in der zweiten Richtung des zweiten Klemmteils befindet, während sich die zweite Vorsprunganordnung des zweiten Klemmteils von der zweiten Vorsprunganordnung des ersten Klemmteils aus gesehen in der vierten Richtung des ersten Klemmteils befindet.When the clamping device is subsequently tightened to clamp the two clamping parts together along the longitudinal axis, and due to the interaction of the effective surfaces, the first clamping part and the second clamping part move relative to each other in a direction transverse to the longitudinal axis of the I <opplungseinrichtung zu drücken, werden die am ersten Klemmteil angeordnete zweite Vorsprunganordnung und die am zweiten Klemmteil angeordnete zweite Vorsprunganordnung zueinander hin gedrückt.Since the two clamping parts can first be arranged with their working surfaces essentially completely overlapping in the relaxed state of the clamping device as explained, this arrangement of the second projection arrangements on each of the two clamping parts has the advantage that the two clamping parts can be very stably supported against each other with their working surfaces, so that the coupling device functions very reliably and stably and thus enables a very reliable and stable connection of two elements to be joined with the corresponding grooves.This advantage is particularly pronounced when both the first projection arrangement and the second projection arrangement of the first clamping part are arranged on the half of the first clamping part lying in the second direction of the first clamping part, and when both the first projection arrangement and the second projection arrangement of the second clamping part are arranged on the half of the second clamping part lying in the fourth direction of the second clamping part.

[0035] In the aforementioned second variant, in which the second projection arrangement of the first clamping element serves to engage behind the second of the at least two undercuts of the groove in the second of the two elements to be joined, while the second projection arrangement of the second clamping element serves to engage behind the second of the at least two undercuts of the groove in the first of the two elements to be joined, the second projection arrangement of the first clamping element is advantageously arranged extending from the first projection arrangement of the first clamping element in a fifth direction of the first clamping element on the first clamping element, which fifth direction of the first clamping element has a component in the fourth direction of the first clamping element and a component in the third direction of the first clamping element.Advantageously, the second projection arrangement of the second clamping part is arranged on the second clamping part extending from the first projection arrangement of the second clamping part into a fifth direction of the second clamping part, which fifth direction of the second clamping part has a component in the second direction of the second clamping part and a component in the third direction of the second clamping part.

[0036] This results in the following: when the two elements to be joined are aligned with their grooves parallel to each other and their grooves are brought into contact opposite each other, and the coupling device, in its assembled state, is inserted into the space formed by the opposing grooves with its longitudinal axis aligned parallel to the grooves, and the clamping device clamps the two clamping parts towards each other along the longitudinal axis, the interaction of the working surfaces causes the first clamping part and the second clamping part to be pressed relative to each other in a direction transverse to the longitudinal axis of the coupling device, so that the first projection arrangement on the first clamping part and the first projection arrangement on the second clamping part are pressed towards each other and abut the undercuts of the grooves.which undercuts the first projection arrangement on the first clamping part and the first projection arrangement on the second clamping part engage behind. As soon as the first projection arrangement on the first clamping part and the first projection arrangement on the second clamping part abut the respective undercut, the first clamping part and the second clamping part begin to rotate relative to each other about their longitudinal directions as the clamping device is tightened further, until the second projection arrangement on the first clamping part and the second projection arrangement on the second clamping part also abut the undercuts.which undercuts engage the second projection arrangement located on the first clamping part and the second projection arrangement located on the second clamping part. Thus, when the clamping device is tightened, the interaction of the working surfaces causes the first clamping part and the second clamping part to be pressed relative to each other in a direction transverse to the longitudinal axis of the coupling device. Furthermore, due to the contact of the first projection arrangements with the respective undercuts they engage, the first clamping part and the second clamping part are rotated relative to each other about their longitudinal directions. This rotation results in not only the first projection arrangement located on the first clamping part and the first projection arrangement located on the second clamping part being pressed towards each other,but that ultimately, the second protrusion arrangement on the first clamping element and the second protrusion arrangement on the second clamping element are also pressed towards each other. Accordingly, the two elements to be joined can be drawn evenly towards each other by the coupling device when the clamping device tightens the two clamping elements towards each other along their longitudinal axis. This enables a very uniform and therefore stable connection of the two elements with the coupling device. In addition, the advantage is that the size and dimensions of the coupling device do not need to be precisely matched to the size of the grooves with undercuts on both sides in order to optimally connect the two elements. This allows the coupling device to be used in a wider variety of applications.

[0037] If the second projection arrangement of the first clamping part is arranged on the first clamping part in the fifth direction of the first clamping part, starting from the first projection arrangement of the first clamping part, which fifth direction of the first clamping part has a component in the fourth direction of the first clamping part and a component in the third direction of the first clamping part, and furthermore, the second projection arrangement of the second clamping part is arranged on the second clamping part in a fifth direction of the second clamping part, which fifth direction of the second clamping part has a component in the second direction of the second clamping part and a component in the third direction of the second clamping part,Advantageously, the second projection of the first clamping element is arranged on a half of the first clamping element lying in the fourth direction of the first clamping element, and the second projection of the second clamping element is arranged on a half of the second clamping element lying in the second direction of the second clamping element. This has the advantage that the coupling device can be designed to be comparatively compact and versatile.

[0038] Preferably, the component of the fifth direction of the first clamping element that is directed in the fourth direction of the first clamping element is approximately equal in size to the component of the fifth direction of the first clamping element that is directed in the third direction of the first clamping element, while the component of the fifth direction of the second clamping element that is directed in the second direction of the second clamping element is approximately equal in size to the component of the fifth direction of the second clamping element that is directed in the third direction of the second clamping element. This allows the two clamping elements to be constructed in a simple manner such that a region of a projection of the effective surface of each clamping element onto a plane perpendicular to the longitudinal direction of the respective clamping element, which lies between the first projection arrangement and the second projection arrangement of the respective clamping element, has a substantially square cross-section.This allows the working surfaces to be shaped in such a way that the two clamping parts can be supported very stably against each other with their working surfaces, so that the coupling device functions very reliably and stably and thus enables a very reliable and stable connection of two elements to be joined with the corresponding grooves.This advantage is particularly pronounced if, in addition, the first projection arrangement of the first clamping part is arranged on the half of the first clamping part lying in the second direction of the first clamping part, while the second projection arrangement of the first clamping part is arranged on the half of the first clamping part lying in the fourth direction of the first clamping part, and if, in addition, the first projection arrangement of the second clamping part is arranged on the half of the second clamping part lying in the fourth direction of the second clamping part, while the second projection arrangement of the second clamping part is arranged on the half of the second clamping part lying in the second direction of the second clamping part.

[0039] Alternatively to these variants, it is also possible that only one of the two clamping parts has a second protrusion arrangement or that neither of the two clamping parts has a second protrusion arrangement.

[0040] A coupling device according to the aforementioned second variant, in which the second projection arrangement of the first clamping part serves to engage behind the second of the at least two undercuts of the groove in the second of the two elements to be joined, while the second projection arrangement of the second clamping part serves to engage behind the second of the at least two undercuts of the groove in the first of the two elements to be joined, wherein the second projection arrangement of the first clamping part is arranged on the first clamping part extending from the first projection arrangement of the first clamping part in a fifth direction of the first clamping part, which fifth direction of the first clamping part has a component in the fourth direction of the first clamping part and a component in the third direction of the first clamping part,Furthermore, the second projection arrangement of the second clamping element, extending from the first projection arrangement of the second clamping element, is arranged on the second clamping element in a fifth direction, which fifth direction of the second clamping element has a component in the second direction of the second clamping element and a component in the third direction of the second clamping element. This configuration can also be implemented without the features whereby the normal vector perpendicular to the effective surface of the first clamping element has both a component pointing in the first direction of the first clamping element and a component pointing in the second direction of the first clamping element, and the normal vector perpendicular to the effective surface of the second clamping element has both a component pointing in the third direction of the second clamping element and a component pointing in the fourth direction of the second clamping element. Such a configurationA coupling device belonging to a second invention has the following features: a coupling device for connecting two elements to be connected, each of which has a groove undercut on both sides by at least one undercut and thus undercut by at least two undercuts, wherein the I <opplungseinrichtung ein erstes Klemmteil und ein zweites Klemmteil und somit zwei Klemmteile umfasst. Dabei ist zu beiden der zwei Klemmteilen je eine Längsrichtung, eine senkrecht zur Längsrichtung ausgerichtete erste Richtung, eine sowohl senkrecht zur Längsrichtung als auch senkrecht zur ersten Richtung ausgerichtete zweite Richtung, eine zur ersten Richtung entgegengesetzt ausgerichtete dritte Richtung und eine zur zweiten Richtung entgegengesetzt ausgerichtete vierte Richtung definiert ist. Das erste Klemmteil weist eine Wirkfläche auf,which effective surface is inclined to the longitudinal direction of the first clamping element. A normal vector perpendicular to the effective surface of the first clamping element has a component pointing in the second direction of the first clamping element. The second clamping element has an effective surface,which effective surface is inclined to the longitudinal direction of the second clamping element. A normal vector perpendicular to the effective surface of the second clamping element has a component pointing in the fourth direction of the second clamping element. The first clamping element has a first projection arrangement projecting in the first direction of the first clamping element for engaging a first of the at least two undercuts of the groove in a first of the two elements to be connected, and the second clamping element has a first projection arrangement projecting in the first direction of the second clamping element for engaging a first of the at least two undercuts of the groove in a second of the two elements to be connected. This coupling device also includes a clamping device for clamping the two clamping elements together substantially along a longitudinal axis of the I <opplungs-einrichtung,wherein in a composite state the I <opplungseinrichtung die zwei Klemmteile je mit ihrer Längsrichtung im Wesentlichen entlang der Längsachse der Kopplungseinrichtung ausgerichtet sind, während die erste Richtung des ersten Klemmteils und die erste Richtung des zweiten Klemmteils im Wesentlichen parallel zueinander ausgerichtet sind und die zweite Richtung des ersten Klemmteils und die zweite Richtung des zweiten Klemmteils im Wesentlichen parallel zueinander ausgerichtet sind, und die zwei Klemmteile je mit ihren Wirkflächen einander zugewandt hintereinander entlang der Längsachse angeordnet und durch die Spanneinrichtung entlang der Längsachse aufeinander zu spannbar oder aufeinander zu gespannt sind, wobei, wenn durch die Spanneinrichtung die zwei Klemmteile entlang der Längsachse aufeinander zu gespannt werden,Due to the interaction of the working surfaces, the first clamping part and the second clamping part are pressed relative to each other in a direction transverse to the longitudinal axis of the coupling device, so that the first projection arrangement on the first clamping part and the first projection arrangement on the second clamping part are pressed towards each other. The first clamping part has a second projection arrangement for engaging behind a second of the at least two undercuts of the groove in the second of the two elements to be joined, while the second clamping part has a second projection arrangement for engaging behind the second of the at least two undercuts of the groove in the first of the two elements to be joined. The second projection arrangement of the first clamping part extends from the first projection arrangement of the first clamping part in a fifth direction on the first clamping part.The second projection arrangement of the second clamping part, extending from the first projection arrangement of the second clamping part into a fifth direction of the second clamping part, comprises a component in the second direction of the second clamping part and a component in the third direction of the second clamping part.

[0041] Such a coupling device belonging to the second invention has the advantage that it enables a very uniform and therefore stable connection of the two elements to be joined. In addition, it also offers the advantage that the size and dimensions of the coupling device do not need to be precisely adapted to the size of the grooves, which are undercut on both sides, in order to optimally connect the two elements to be joined. This allows the coupling device to be used in a wider variety of applications. Such a coupling device belonging to the second invention can have the aforementioned combination of features without including the features otherwise described in this text as advantageous or in accordance with the invention. However, it can also have one or more of the advantageous features described in this text as belonging to the coupling device according to the invention.

[0042] Regardless of the coupling device according to the second invention, in the present coupling device according to the invention, the two clamping parts are preferably each made of a plastic or a metal, in particular aluminum or steel. Manufacturing them from plastic has the advantage that the two clamping parts can be produced simply and cost-effectively. Manufacturing them from metal, on the other hand, has the advantage that the two clamping parts can be manufactured very robustly. Therefore, with a coupling device with two clamping parts made of metal, two elements to be joined can be connected very firmly and stably. In particular, very heavy elements to be joined can be connected and held together in this way. This is especially true if the clamping device is also made of metal.Manufacturing the two clamping parts from steel also offers the advantage that, if the two elements to be connected are fire-resistant, the coupling device enables a connection between the two fire-resistant elements that can withstand the high temperatures generated during fires for extended periods. This makes the coupling device suitable for fire protection applications. This is especially true if the clamping device is also made of steel.

[0043] Alternatively to these options, it is also possible that one of the two clamping parts is made of a material other than plastic or metal, or that both clamping parts are made of a material other than plastic or metal.

[0044] Preferably, the two clamping parts are manufactured as solid components. This has the advantage that the two clamping parts exhibit high stability for the material from which they are made.

[0045] However, it is also possible that the two clamping elements are not manufactured as solid parts. In a preferred version, the two clamping elements are each made of bent sheet steel. This has the advantage that the two clamping elements are very heat-resistant, making the coupling device suitable for fire protection applications, and that at the same time the two clamping elements can be manufactured relatively inexpensively and with comparatively little effort.

[0046] A coupling device with two clamping parts made of bent sheet steel can also be designed without the features whereby the normal vector perpendicular to the working surface of the first clamping part has both a component pointing in the first direction of the first clamping part and a component pointing in the second direction of the first clamping part, and the normal vector perpendicular to the working surface of the second clamping part has both a component pointing in the third direction of the second clamping part and a component pointing in the fourth direction of the second clamping part. Such a coupling device belonging to a third invention has the following features: a coupling device for connecting two elements to be connected, each of which has a groove undercut with at least one undercut.in particular, a groove undercut on both sides by at least one undercut and thus undercut by at least two undercuts, wherein the coupling device comprises a first clamping part and a second clamping part, and thus two clamping parts. For each of the two clamping parts, a longitudinal direction, a first direction oriented perpendicular to the longitudinal direction, a second direction oriented perpendicular to both the longitudinal direction and the first direction, a third direction oriented opposite to the first direction, and a fourth direction oriented opposite to the second direction are defined. The first clamping part has an effective surface.which effective surface is inclined to the longitudinal direction of the first clamping element. A normal vector perpendicular to the effective surface of the first clamping element has a component pointing in the second direction of the first clamping element. The second clamping element has an effective surface,which effective surface is inclined to the longitudinal direction of the second clamping element. A normal vector perpendicular to the effective surface of the second clamping element has a component pointing in the fourth direction of the second clamping element. The first clamping element has a first projection arrangement projecting in the first direction of the first clamping element for engaging behind a first of the at least one undercut of the groove in a first of the two elements to be connected, and the second clamping element has a first projection arrangement projecting in the first direction of the second clamping element for engaging behind a first of the at least one undercut of the groove in a second of the two elements to be connected. This coupling device also includes a clamping device for clamping the two clamping elements together substantially along a longitudinal axis of the I. <opplungs-einrichtung,wherein in a compound state of the coupling device the two clamping parts are each aligned with their longitudinal direction substantially along the longitudinal axis of the coupling device, while the first direction of the first clamping part and the first direction of the second clamping part are aligned substantially parallel to each other and the second direction of the first clamping part and the second direction of the second clamping part are aligned substantially parallel to each other, and the two clamping parts are each arranged one behind the other along the longitudinal axis with their effective surfaces facing each other and can be clamped or tightened towards each other along the longitudinal axis by the clamping device, wherein, when the two clamping parts are clamped towards each other along the longitudinal axis by the clamping device,Due to the interaction of the contact surfaces, the first clamping element and the second clamping element are pressed relative to each other in a direction transverse to the longitudinal axis of the coupling device, so that the first projection arrangement on the first clamping element and the first projection arrangement on the second clamping element are pressed towards each other. The two clamping elements are each made of bent sheet steel. Such a coupling device belonging to the third invention has the advantage that the two clamping elements are very heat-resistant, making the coupling device suitable for fire protection applications, and that at the same time the two clamping elements can be manufactured relatively inexpensively and with comparatively little effort. Such a coupling device belonging to the third invention can have the aforementioned combination of features.without including the features otherwise described in the present text as advantageous or in accordance with the invention. However, it may also have one or more of the advantageous features belonging to the present coupling device according to the invention, as described in the present text.

[0047] Regardless of the coupling device according to the third invention, the clamping device in the present coupling device according to the invention preferably comprises a screw. The screw can be guided through a recess in one of the two clamping parts and screwed into the other of the two clamping parts through this recess, or the screw can be guided through a recess in both of the two clamping parts and screwed into a nut through these recesses in the two clamping parts to clamp the two clamping parts substantially along the longitudinal axis of the clamping part. <opplungs-einrichtung aufeinander zu zu spannen.In the first case, it is irrelevant whether the screw can be guided through a recess in the first clamping part and screwed into the second clamping part, or whether the screw can be guided through a recess in the second clamping part and screwed into the first clamping part. Preferably, however, the recess in one of the two clamping parts is slightly larger than the screw, so that one of the two clamping parts can move transversely to the screw when the screw is guided through the recess and screwed into the other of the two clamping parts.This allows the first and second clamping parts to be pressed and moved relative to each other in a direction transverse to the longitudinal axis of the coupling device when the clamping device clamps the two clamping parts together along their longitudinal axis. This causes the first projection arrangement on the first clamping part and the first projection arrangement on the second clamping part to be pressed towards each other, and the first and second clamping parts to be pushed apart along an axis defined by the first and third directions of the two clamping parts. In the second case, the clamping device preferably also includes the nut.Preferably, the recess in at least one of the two clamping parts is slightly larger than the screw, allowing one or both clamping parts to move transversely to the screw when the screw is guided through the corresponding recess. This enables the first clamping part and the second clamping part to be pressed and moved relative to each other in a direction transverse to the longitudinal axis of the coupling device when the clamping device clamps the two clamping parts together along their longitudinal axis due to the interaction of the working surfaces. This causes the first projection arrangement on the first clamping part and the first projection arrangement on the second clamping part to be pressed towards each other, and the first clamping part and the second clamping part to be pushed apart along an axis defined by the first direction and the third direction of the two clamping parts.

[0048] If the coupling device is to be used for fire protection purposes, the screw is preferably made of steel. If the clamping device also includes the aforementioned nut, the nut is preferably made of steel. However, both the screw and the nut, if present, can also be made of a material other than steel.

[0049] Alternatively, the clamping device can also be screwless. For example, instead of a screw, the clamping device could have a quick-release clamp with a clamping lever to secure the two clamping parts essentially along a longitudinal axis of the I <opplungs-einrichtung aufeinander zu spannen.

[0050] Preferably, the coupling device is used in an arrangement with two elements to be connected, each element having a groove undercut with at least one undercut, in particular a groove undercut on both sides with at least one undercut and thus with at least two undercuts. Accordingly, an arrangement advantageously comprises two elements to be connected, each element having a groove undercut with at least one undercut, in particular a groove undercut on both sides with at least one undercut and thus with at least two undercuts, as well as at least one or more of the coupling devices according to the invention described above.

[0051] This involves one or more I <opplungseinrichtungen sowie die mit dem wenigstens einen Hinterschnitt hinterschnittenen Nuten der zwei zu verbindenden Elemente vorteilhafterweise derart bemessen, dass zum Verbinden der zwei zu verbindenden Elemente, wenn die zwei zu verbindenden Elemente mit ihren Nuten parallel zueinander ausgerichtet und mit ihren Nuten sich gegenüberliegend in Kontakt gebracht sind, die Kopplungseinrichtung im zusammengesetzten Zustand mit ihrer Längsachse parallel zu den Nuten ausgerichtet in den durch die sich gegenüberliegenden Nuten gebildeten Raum einführbar ist, sodass die erste Vorsprunganordnung des ersten Klemmteils den ersten des wenigstens einen Hinterschnitts der Nut im ersten der zwei zu verbindenden Elemente hintergreift und die erste Vorsprunganordnung des zweiten Klemmteils den ersten des wenigstens einen Hinterschnitts der Nut im zweiten der zwei zu verbindenden Elemente hintergreift,according to which the clamping device allows the two clamping parts with their working surfaces to be clamped towards each other essentially along the longitudinal axis, so that, due to the interaction of the working surfaces, the two clamping parts are pressed relative to each other in the direction transverse to the longitudinal axis of the coupling device, so that the first projection arrangement arranged on the first clamping part and the first projection arrangement arranged on the second clamping part are pressed towards each other, and so that, by means of the first projection arrangement arranged on the first clamping part and the first projection arrangement arranged on the second clamping part, the first of the at least one undercut of the groove in the first of the two elements to be joined and the first of the at least one undercut of the groove in the second of the two elements to be joined are pressed towards each other.to join the two elements by clamping them together. Advantageously, the direction is perpendicular to the longitudinal axis of the I. <opplungseinrichtung, in welche Richtung aufgrund des Zusammenwirkens der Wirkflächen die zwei Klemmteile relativ zueinander gedrückt werden, zudem so ausgerichtet, dass das erste Klemmteil und das zweite Klemmteil auch entlang einer durch die erste Richtung und die dritte Richtung der zwei Klemmteile definierten Achse auseinander gedrückt werden, sodass sich die zwei Klemmteile seitlich an den beiden Rändern der Nut im ersten zu verbindenden Element und an den Rändern der Nut im zweiten zu verbindenden Element absperren, um beim Verbinden der zwei zu verbindenden Elemente die zwei zu verbindenden Elemente in eine Richtung quer zu den Nuten in den zwei zu verbindenden Elementen korrekt zu positionieren.,

[0052] However, the coupling device can also exist separately from the arrangement and thus be manufactured and distributed separately from the arrangement.

[0053] Further advantageous embodiments and combinations of features of the invention can be derived from the following detailed description and the entirety of the patent claims. Brief description of the drawings

[0054] The drawings used to illustrate the exemplary embodiment show: Fig. 1a, b, c each shows a schematic representation of an arrangement with two elements to be connected and an I according to the invention. <opplungseinrichtung zum Verbinden der zwei zu verbindenden Elemente, Fig. 2a, b, cje eine schematische Darstellung einer weiteren Anordnung mit den zwei zu verbindenden Elementen und einer weiteren erfindungsgemässen Kopplungseinrichtung zum Verbinden der zwei zu verbindenden Elemente, Fig. 3eine schematische Explosionsdarstellung einer weiteren Anordnung mit den zwei zu verbindenden Elementen mit einer weiteren erfindungsgemässen Kopplungseinrichtung zum Verbinden der zwei zu verbindenden Elemente, Fig. 4a, b, cje eine schematische Darstellung einer weiteren Anordnung mit den zwei zu verbindenden Elementen und einer weiteren erfindungsgemässen Kopplungseinrichtung zum Verbinden der zwei zu verbindenden Elemente, Fig.Figures 5a, b, c, and d are schematic representations of a further arrangement with the two elements to be connected and a further coupling device according to the invention for connecting the two elements to be connected, and Figure 6 is a schematic exploded view of a further arrangement with the two elements to be connected and a further coupling device, not according to the invention, for connecting the two elements to be connected.

[0055] Basically, identical parts in the figures are marked with the same reference symbols. Ways to implement the invention

[0056] The Figures 1a, 1b and 1cFigure 1 shows a schematic representation of an arrangement 300 with two elements 100, 200 to be connected and a coupling device 1 according to the invention for connecting the two elements 100, 200. The two elements 100, 200 to be connected each have a groove 101, 201 undercut on both sides by an undercut 102a, 102b, 202a, 202b, and thus undercut by two undercuts 102a, 102b, 202a, 202b. Therefore, the two elements 100, 200 to be connected each have a groove 101, 201 undercut by at least one undercut 102a, 102b, 202a, 202b.

[0057] In the Figures 1a, 1b and 1cThe two elements to be connected, 100 and 200, are each represented as longitudinal profiles. Each longitudinal profile has a length that is slightly shorter than the length of the coupling device 1. Therefore, the I <opplungseinrichtung 1 in einem zusammengesetzten Zustand der Kopplungseinrichtung 1 an beiden Enden über die zu verbindenden Elemente 100, 200 hinaus. Dadurch ist die Funktionsweise der Kopplungseinrichtung 1 gut ersichtlich. Die zwei zu verbindenden Elemente 100, 200 können aber auch viel länger als in den Figures 1a, 1b and 1c be represented. In addition, the two can be represented with the inventive I <opplungseinrichtung 1 zu verbindenden Elemente 100, 200 auch massiver und grösser als in den Figures 1a, 1b and 1cThey can be depicted as long as they each have a groove with at least one undercut. For example, the two elements to be joined could be square aluminum profiles, each with a groove on one side. Alternatively, the two elements to be joined could be entire facade elements for a building or window elements for a building. These elements could each have a groove running around their perimeter. This groove could have an undercut on one side running along the groove around the respective element. Likewise, this groove could have an undercut on both sides running along the groove around the respective element.

[0058] In the Figure 1ais an oblique view of an exploded view of the I <opplungseinrichtung 1 und der zwei Elemente 100, 200 gezeigt. Dabei verläuft eine Längsachse der Kopplungseinrichtung 1 in der Darstellung der Figure 1a from top left to bottom right. In the Figure 1b is an oblique view of the coupling device 1 and the two elements 100, 200 from the same perspective as in the Figure 1a shown. In contrast to the Figure 1a However, they are in the Figure 1b The two elements 100, 200 to be connected are shown connected to each other by the coupling device 1.

[0059] As in the Figures 1a and 1bAs can be seen, the coupling device 1 comprises a first clamping part 2 and a second clamping part 3, and thus two clamping parts 2, 3. Furthermore, the coupling device 1 comprises a screw as a clamping device 4 for clamping the two clamping parts 2, 3 towards each other essentially along the longitudinal axis of the 1. <opplungs-einrichtung 1. Zu beiden der zwei Klemmteilen 2, 3 ist je eine Längsrichtung, eine senkrecht zur Längsrichtung ausgerichtete erste Richtung, eine sowohl senkrecht zur Längsrichtung als auch senkrecht zur ersten Richtung ausgerichtete zweite Richtung, eine zur ersten Richtung entgegengesetzt ausgerichtete dritte Richtung und eine zur zweiten Richtung entgegengesetzt ausgerichtete vierte Richtung definiert. In der Darstellung in der Figures 1a and 1bThe two clamping parts 2, 3 are shown oriented such that the longitudinal direction of both clamping parts 2, 3 runs from the top left to the bottom right in the illustration, and that the first direction of both clamping parts 2, 3 points from the bottom left to the top right in the illustration, while the second direction points from bottom to top. Accordingly, in the Figures 1a and 1b The two clamping parts 2, 3 are shown aligned in such a way that for both clamping parts 2, 3 the third direction in the illustration points from top right to bottom left, while the fourth direction in the illustration points from top to bottom.

[0060] In the Figure 1aIt can be seen that the first clamping element 2 has an effective surface 5, which is inclined to the longitudinal direction of the first clamping element 2. Therefore, a normal vector perpendicular to the effective surface 5 of the first clamping element 2, although not parallel to the longitudinal direction of the first clamping element 2, has a component pointing in the longitudinal direction of the first clamping element 2. Furthermore, the normal vector perpendicular to the effective surface 5 of the first clamping element 2 has a component pointing in the first direction of the first clamping element 2 as well as a component pointing in the second direction of the first clamping element 2.For the first clamping part 2, an angle measured in a plane spanned by the longitudinal direction and the first direction between the effective surface 5 and the first direction is 45°, while an angle measured in a plane spanned by the longitudinal direction and the second direction between the effective surface 5 and the second direction is 45°.

[0061] The first clamping element 2 has a first projection 7 projecting in the first direction of the first clamping element 2 for engaging behind a first of the two undercuts 102a of the groove 101 in the first of the two elements 100 to be joined. Furthermore, the first clamping element 2 has a second projection 9 projecting in the third direction of the first clamping element 2 for engaging behind a second of the two undercuts 102b of the groove 101 in the first of the two elements 100 to be joined. The second projection 9 of the first clamping element 2 is arranged on the first clamping element 2 extending from the first projection 7 of the first clamping element 2 in the third direction. The first projection 7 and the second projection 9 of the first clamping element 2 are located on a half of the first clamping element 2 that lies in the second direction of the first clamping element 2, i.e., in the Figure 1aarranged on the upward-pointing half of the first clamping part 2.

[0062] The first projection 7 of the first clamping element 2 forms, in the longitudinal direction of the first clamping element 2, a projection in a region opposite the first end of the first clamping element 2 for engaging behind the first of the two undercuts 102a of the groove 101 in the first of the two elements 100 to be joined. Furthermore, the first projection 7 of the first clamping element 2 also forms a projection in the region of the active surface 5 of the first clamping element 2 for engaging behind the first of the two undercuts 102a of the groove 101 in the first of the two elements 100 to be joined. The projection of the first projection 7 located in the region of the first end of the first clamping element 2 and the projection of the first projection 7 located in the region of the active surface 5 of the first clamping element 2 are designed as a continuous projection extending along the longitudinal direction of the first clamping element 2.The first projection arrangement 7 of the first clamping part 2 therefore consists of a projection extending along the longitudinal direction of the first clamping part 2.

[0063] The second projection 9 of the first clamping element 2 forms, in the longitudinal direction of the first clamping element 2, a projection in the region of the first end of the first clamping element 2 for engaging behind the second of the two undercuts 102b of the groove 101 in the first of the two elements 100 to be joined. Furthermore, the second projection 9 of the first clamping element 2 also forms a projection in the region of the effective surface 5 of the first clamping element 2 for engaging behind the second of the two undercuts 102b of the groove 101 in the first of the two elements 100 to be joined. The projection of the second projection 9 located in the region of the first end of the first clamping element 2 and the projection of the second projection 9 located in the region of the effective surface 5 of the first clamping element 2 are designed as a continuous projection extending along the longitudinal direction of the first clamping element 2.The second projection arrangement 9 of the first clamping part 2 therefore consists of a projection extending along the longitudinal direction of the first clamping part 2.

[0064] In the Figure 1aIt can be seen that the second clamping element 3 has an effective surface 6, which is inclined to the longitudinal direction of the second clamping element 3. Therefore, a normal vector perpendicular to the effective surface 6 of the second clamping element 3, although not parallel to the longitudinal direction of the second clamping element 3, has a component pointing in the longitudinal direction of the second clamping element 3. Furthermore, the normal vector perpendicular to the effective surface 6 of the second clamping element 3 has a component pointing in both the third direction and the fourth direction of the second clamping element 3.In the second clamping part 3, an angle measured in a plane spanned by the longitudinal direction and the third direction between the effective surface 6 and the third direction is 45°, while an angle measured in a plane spanned by the longitudinal direction and the fourth direction between the effective surface 6 and the fourth direction is 45°.

[0065] The second clamping element 3 has a first projection 8 extending in the first direction of the second clamping element 3 for engaging behind a first of the two undercuts 202a of the groove 201 in the second of the two elements 200 to be joined. Furthermore, the second clamping element 3 has a second projection 10 extending in the third direction of the second clamping element 3 for engaging behind a second of the two undercuts 202b of the groove 201 in the second of the two elements 200 to be joined. The second projection 10 of the second clamping element 3 extends from the first projection 8 of the second clamping element 3 in the third direction of the second clamping element 3. The first projection 8 and the second projection 10 of the second clamping element 3 are located on a half of the second clamping element 3 that lies in the fourth direction of the second clamping element 3, i.e., in the Figure 1aarranged on the downward-pointing half of the second clamping part 3.

[0066] The first projection 8 of the second clamping part 3 forms a projection in the longitudinal direction of the second clamping part 3, in a region opposite the effective surface 6 of the second clamping part 3, for engaging behind the first of the two undercuts 202a of the groove 201 in the second of the two elements 200 to be joined. Furthermore, the first projection 8 of the second clamping part 3 also forms a projection in the region of the effective surface 6 of the second clamping part 3 for engaging behind the first of the two undercuts 202a of the groove 201 in the second of the two elements 200 to be joined. The projection of the first projection 8 located in the region of the first end of the second clamping part 3 and the projection of the first projection 8 located in the region of the effective surface 6 of the second clamping part 3 are designed as a continuous projection extending along the longitudinal direction of the second clamping part 3.The first projection arrangement 8 of the second clamping part 3 therefore consists of a projection extending along the longitudinal direction of the second clamping part 3.

[0067] The second projection arrangement 10 of the second clamping part 3 forms a projection in the longitudinal direction of the second clamping part 3, in the region of the first end of the second clamping part 3, for engaging behind the second of the two undercuts 202b of the groove 201 in the second of the two elements 200 to be joined. Furthermore, the second projection arrangement 10 of the second clamping part 3 also forms a projection in the region of the working surface 6 of the second clamping part 3 for engaging behind the second of the two undercuts 202b of the groove 201 in the second of the two elements 200 to be joined. The projection of the second projection arrangement 10 located in the region of the first end of the second clamping part 3 and the projection of the second projection arrangement 10 located in the region of the working surface 6 of the second clamping part 3 are designed as a continuous projection extending along the longitudinal direction of the second clamping part 3.The second projection arrangement 10 of the second clamping part 3 therefore consists of a projection extending along the longitudinal direction of the first clamping part 3.

[0068] In a composite state of the coupling device 1, the two clamping parts 2, 3 are each aligned with their longitudinal direction substantially along the longitudinal axis of the coupling device 1, while the first direction of the first clamping part 2 and the first direction of the second clamping part 3 are aligned substantially parallel to each other, and the second direction of the first clamping part 2 and the second direction of the second clamping part 3 are aligned substantially parallel to each other, and the two clamping parts 2, 3 are each arranged one behind the other along the longitudinal axis of the coupling device 1 with their effective surfaces 5, 6 facing each other, and can be clamped towards each other or clamped towards each other along the longitudinal axis by the clamping device 4, wherein, when the two clamping parts 2, 3 are clamped towards each other along the longitudinal axis by the clamping device 4, due to the interaction of the effective surfaces 5,6 the first clamping part 2 and the second clamping part 3 are pressed relative to each other in a direction transverse to the longitudinal axis of the coupling device 1, so that the first projection arrangement 7 arranged on the first clamping part 2 and the first projection arrangement 8 arranged on the second clamping part 3 are pressed towards each other and so that the second projection arrangement 9 arranged on the first clamping part 2 and the second projection arrangement 10 arranged on the second clamping part 3 are pressed towards each other.

[0069] As already explained, the normal vector perpendicular to the effective surface 5 of the first clamping element 2 has a component pointing in the longitudinal direction of the first clamping element 2, a component pointing in the first direction of the first clamping element 2, and a component pointing in the second direction of the first clamping element 2. Furthermore, the normal vector perpendicular to the effective surface 6 of the second clamping element 3 has a component pointing in the longitudinal direction of the second clamping element 3, a component pointing in the third direction of the second clamping element 3, and a component pointing in the fourth direction of the second clamping element 3.This results in the following: when the clamping device 4 clamps the two clamping parts 2, 3 towards each other along the longitudinal axis of the coupling device 1, the interaction of the effective surfaces 5, 6 causes the first clamping part 2 to be pressed relative to the second clamping part 3 in a direction that has a component oriented in both the third and fourth directions of the first clamping part 2, while the second clamping part 3 is pressed relative to the first clamping part 2 in a direction that has a component oriented in both the first and second directions of the second clamping part 3. Therefore, as already described, the first projection arrangement 7 on the first clamping part 2 and the first projection arrangement 8 on the second clamping part 3 are pressed towards each other.Therefore, as already described, the second projection arrangement 9 arranged on the first clamping part 2 and the second projection arrangement 10 arranged on the second clamping part 3 are pressed towards each other.

[0070] More precisely, this causes the first projection arrangement 7 on the first clamping part 2 and the first projection arrangement 8 on the second clamping part 3 to be pressed towards each other in an approach direction, while the second projection arrangement 9 on the first clamping part 2 and the second projection arrangement 10 on the second clamping part 3 are also pressed towards each other in this approach direction. This approach direction has a component along an axis defined by the second and fourth directions of the two clamping parts 2 and 3. Furthermore, the approach direction also has a component along an axis defined by the first and third directions of the two clamping parts 2 and 3.Along this axis, defined by the first and third directions of the two clamping parts 2 and 3, the first clamping part 2 and the second clamping part 3 are forced apart, so that the two clamping parts 2 and 3 lock laterally against the two edges of the groove 101 in the first element 100 to be joined and against the edges of the groove 201 in the second element 200 to be joined. This results in the two elements 100 and 200 being not only clamped together when the clamping device 4 is tightened, but also positioned precisely and reproducibly relative to each other in a direction transverse to the grooves 101 and 201.

[0071] During the Figures 1a, 1b and 1cIn the coupling device 1 shown, the two clamping parts 2, 3 are each made of solid plastic. The screw, which forms the clamping device 4, is made of steel and has a self-tapping thread to engage in a threadless opening in an I <unststoffelement geschraubt zu werden. Dabei weist das zweite Klemmteil 3 eine entlang seiner Längsrichtung durchgehende Ausnehmung auf, welche einen grösseren Querschnitt als die Schraube aufweist. Das erste Klemmteil 2 hingegen weist eine entlang seiner Längsrichtung durchgehende Ausnehmung auf, welche einen etwas kleineren Querschnitt als die Schraube aufweist. Damit kann die Schraube durch diese Ausnehmung im zweiten Klemmteil 3 geführt und selbstschneidend in das erste Klemmteil 2 geschraubt werden, um die zwei Klemmteile 2, 3 im Wesentlichen entlang der Längsachse der I<opplungseinrichtung 1 aufeinander zu zu spannen.Since the recess in the second clamping part 3 has a larger cross-section than the screw, the second clamping part 3 can move perpendicular to the screw when the screw is guided through the recess in the second clamping part 3 and screwed into the first clamping part 2.This enables the first clamping part 2 and the second clamping part 3 to be pressed and moved relative to each other in a direction transverse to the longitudinal axis of the coupling device 1 by the interaction of the effective surfaces 5, 6, so that the first projection arrangement 7 and second projection arrangement 9 arranged on the first clamping part 2 and the first projection arrangement 8 and second projection arrangement 10 arranged on the second clamping part 2 can be pressed towards each other and the first clamping part 2 and the second clamping part 3 can be pressed apart along an axis defined by the first direction and the third direction of the two clamping parts 2, 3.

[0072] In the Figure 1b is an oblique view of the coupling device 1 and the two elements 100, 200 from the same perspective as in the Figure 1a shown. In contrast to the Figure 1a However, they are in the Figure 1b The two elements 100, 200 to be connected are shown connected to each other by the coupling device 1.

[0073] In the Figure 1c are as already mentioned in the Figure 1b The two elements to be connected, 100 and 200, are shown connected to each other by the coupling device 1. In contrast to the Figure 1b are in the Figure 1c However, a top view of the arrangement 300 with the coupling device 1 and the two elements 100, 200 to be connected is shown, in which view the direction of view runs along the longitudinal axis of the coupling device 1.

[0074] The Figures 2a, 2b and 2cFigures 3 and 4 show a schematic representation of a further arrangement 320 with the two elements 100 and 200 to be connected, and a further coupling device 21 according to the invention for connecting the two elements 100 and 200. This further coupling device 21 is constructed in many aspects identically to the one shown in Figures 3 and 4. Figures 1a, 1b and 1c Coupling device shown 1. Analogous to the Figures 1a and 1b is in the Figure 2a An oblique view of an exploded representation of the coupling device 21 and the two elements 100, 200 is shown, while in the Figure 2b An oblique view from the same perspective is shown, with the two elements to be joined, 100 and 200, depicted connected by the coupling device 21. Figure 2c is analogous to Figure 1cA top view of the arrangement 320 with the coupling device 21 and the two elements 100, 200 to be connected is shown, in which the viewing direction runs along the longitudinal axis of the coupling device 21. The two elements 100, 200 to be connected are shown connected to each other by the coupling device 21.

[0075] In contrast to the Figures 1a, 1b and 1c are is at the in the Figures 2a, 2b and 2c In the coupling device 21 shown, the first clamping part 22 and the second clamping part 23 are interchanged, or rather, the screw which forms the clamping device 24 is guided through a recess in the first clamping part 22 and screwed into the second clamping part 23. The recess in the first clamping part 22 has a larger cross-section than the screw.

[0076] In contrast to the Figures 1a and 1b are also in the Figures 2a and 2bThe directions defined for the two clamping parts 22, 23 are shown reversed. Thus, in the illustration in the Figures 2a and 2b The two clamping parts 22, 23 are shown oriented such that the longitudinal direction of both clamping parts 22, 23 runs from the top left to the bottom right in the illustration, and that the first direction of both clamping parts 22, 23 points from the top right to the bottom left in the illustration, while the second direction points from top to bottom in the illustration. Accordingly, in the Figures 2a and 2b The two clamping parts 22, 23 are shown aligned such that for both clamping parts 22, 23 the third direction in the illustration points from bottom left to top right, while the fourth direction in the illustration points from bottom to top.

[0077] The in the Figures 2a, 2b and 2c The further coupling device 21 shown is, as already mentioned, constructed in many aspects the same way as the one in the Figures 1a, 1b and 1cCoupling device 1 shown. Thus, in the Figures 2a, 2b and 2c The coupling device 21 shown has the effective surfaces 25, 26 in the same way as in the Figures 1a, 1b and 1c The coupling device 1 shown is aligned. Also, the coupling device shown in the Figures 2a, 2b and 2c The coupling device 21 shown has the first clamping element 22 and the same first projection arrangement 27 extending in the first direction of the first clamping element 22 for engaging behind a first of the two undercuts 102a of the groove 101 in the first of the two elements 100 to be connected. The coupling device 21 shown also has the same first projection arrangement 27 extending in the first direction of the first clamping element 22 for engaging behind a first of the two undercuts 102a of the groove 101 in the first of the two elements 100 to be connected. Figures 2a, 2b and 2c shown coupling device 21 the second clamping part 23 the same first projection arrangement 28 projecting in the first direction of the second clamping part 23 for engaging behind a first of the two undercuts 202a of the groove 201 in the second of the two elements 200 to be connected.

[0078] In contrast to the Figures 1a, 1b and 1c However, the coupling device 1 shown in the Figures 2a, 2b and 2cIn the coupling device 21 shown, the second projection arrangements 29, 30 are arranged differently on the two clamping parts 22, 23. The second projection arrangement 29 of the first clamping part 22 serves to engage behind the second of the at least two undercuts 202b of the groove 202 in the second of the two elements 200 to be connected, while the second projection arrangement 30 of the second clamping part 23 serves to engage behind the second of the at least two undercuts 101b of the groove 101 in the first of the two elements 100 to be connected. Therefore, the second projection arrangement 29 of the first clamping part 22 extends from the first projection arrangement 27 of the first clamping part 22 in a fifth direction on the first clamping part 22, which fifth direction has a component in the fourth direction and a component in the third direction of the first clamping part 22.Furthermore, the second projection arrangement 30 of the second clamping element 23 extends from the first projection arrangement 28 of the second clamping element 23 into a fifth direction on the second clamping element 23. This fifth direction of the second clamping element 23 comprises a component in the second direction of the second clamping element 23 and a component in the third direction of the second clamping element 23. The component of the fifth direction of the first clamping element 23 oriented in the fourth direction of the first clamping element 22 is approximately equal in size to the component of the fifth direction of the first clamping element 23 oriented in the third direction of the first clamping element 22, while the component of the fifth direction of the second clamping element 23 oriented in the second direction of the second clamping element 23 is approximately equal in size to the component of the fifth direction of the second clamping element 23 oriented in the third direction of the second clamping element 23.As a result, the second projection arrangement 29 of the first clamping part 22 is arranged on a half of the first clamping part 22 lying in the fourth direction of the first clamping part 22, and the second projection arrangement 30 of the second clamping part 23 is arranged on a half of the second clamping part 23 lying in the second direction of the second clamping part 23.

[0079] This arrangement of the first projection arrangements 27, 28 and the second projection arrangements 29, 30 results in the following: when the two elements 100, 200 to be connected are aligned parallel to each other with their grooves 101, 201 and brought into contact opposite each other with their grooves 101, 202, the coupling device 21, in its assembled state, is inserted into the space formed by the opposing grooves 101, 201 with its longitudinal axis aligned parallel to the grooves 101, 201, and the two clamping parts 22, 23 are clamped towards each other along the longitudinal axis by the clamping device 24, the first clamping part 22 and the second clamping part 23 are pressed relative to each other in a direction transverse to the longitudinal axis of the coupling device 21 due to the interaction of the working surfaces 25, 26.so that the first projection arrangement 27 arranged on the first clamping part 22 and the first projection arrangement 28 arranged on the second clamping part 23 are pressed towards each other and abut the undercuts 102a, 202a of the grooves 101, 201, which undercuts 102a, 202a engage behind the first projection arrangement 27 arranged on the first clamping part 22 and the first projection arrangement 28 arranged on the second clamping part 23. As soon as the first projection arrangement 27 arranged on the first clamping part 22 and the first projection arrangement 28 arranged on the second clamping part 23 abut the respective undercut 102a, 202a, the first clamping part 22 and the second clamping part 23 begin to rotate about their longitudinal directions relative to each other when the clamping device 23 is tightened further, until the second projection arrangement 29 arranged on the first clamping part 22 and the second projection arrangement 30 arranged on the second clamping part 23 also abut the undercuts 202b, 102b,which undercuts 202b, 102b engage the second projection arrangement 29 arranged on the first clamping part 22 and the second projection arrangement 30 arranged on the second clamping part 23. Thus, when the clamping device 24 is tightened, the interaction of the working surfaces 25, 26 causes the first clamping part 22 and the second clamping part 23 to be pressed relative to each other in a direction transverse to the longitudinal axis of the coupling device 21. Furthermore, due to the contact of the first projection arrangements 27, 28 with the respective undercuts 102a, 202a they engage, the first clamping part 22 and the second clamping part 23 are rotated relative to each other about their longitudinal directions. This rotation results in not only the first projection arrangement 27 arranged on the first clamping part 22 and the first projection arrangement 28 arranged on the second clamping part 23 being pressed towards each other,but that ultimately the second projection arrangement 29 arranged on the first clamping part 22 and the second projection arrangement 30 arranged on the second clamping part 23 are also pressed towards each other. Accordingly, the two elements 100, 200 to be joined can be drawn evenly towards each other by the coupling device 21 when the clamping device 24 clamps the two clamping parts 22, 23 towards each other along the longitudinal axis. Thus, the coupling device 21 enables a very even and therefore stable connection of the two elements 100, 200 to be joined. In addition, the advantage is also achieved that the size and dimensions of the coupling device 21 do not need to be adapted as precisely to the size of the grooves 100, 200, which are undercut on both sides by undercuts 102a, 102b, 202a, 202b, in order to connect the two elements 100, 200.to be able to optimally connect 200. This allows the coupling device 21 to be used in a more versatile way.

[0080] The Figure 3 Figure 1 shows a schematic exploded view of a further arrangement 340 with the two elements 100, 200 to be connected, and a further coupling device 41 according to the invention for connecting the two elements 100, 200. This further coupling device 41 is practically identical to the one shown in the Figures 2a, 2b and 2c coupling device 21 shown. In contrast to the one shown in the Figures 2a, 2b and 2c The coupling device 21 shown is located in the Figure 3However, in the coupling device 41 shown, the two clamping parts 42, 43 are not made of plastic, but of aluminum. The recess in the second clamping part 43, into which the screw of the clamping device 44 for clamping the two clamping parts 42, 43 together is inserted, has a dimension substantially along the longitudinal axis of the <opplungs-einrichtung 41 geschraubt wird, ein Innengewinde auf. Entsprechend weist auch die Schraube der Spanneinrichtung 44 kein selbstschneidendes Gewinde auf.

[0081] The Figures 4a, 4b and 4c Figures 3 and 4 show a schematic representation of a further arrangement 360 with the two elements 100 and 200 to be connected, and a further coupling device 61 according to the invention for connecting the two elements 100 and 200. This further coupling device 61 is practically identical to the one shown in the Figures 2a, 2b and 2c and 3 shown I <opplungseinrichtungen 21, 41. Im Gegensatz zur in den Figures 2a, 2b and 2cThe coupling device 21 shown is located in the Figures 4a, 4b and 4c The coupling device 61 shown has two clamping parts 62, 63 that are not made of plastic, but as in the one shown in the Figure 3 The coupling device 41 shown is made of aluminum. The coupling device shown in the Figures 4a, 4b and 4cHowever, in the coupling device 61 shown, both the recess in the first clamping part 62 and the recess in the second clamping part 63 have a diameter that is larger than the diameter of the screw of the clamping device 64. Thus, when the screw of the clamping device 64 is guided through the recess in the first clamping part 62 and the recess in the second clamping part 63, both the first clamping part 62 and the second clamping part 63 can be moved slightly transversely to the screw. In order to nevertheless clamp the two clamping parts 62, 63 substantially along the longitudinal axis of the clamping device 64, the screw is... <opplungs-einrichtung 61 aufeinander spannen zu können, weist die Spanneinrichtung 64 eine zur Schraube passende Mutter 71 auf. Diese Mutter 71 weist aussen ein Vierkantprofil auf, um sich auf der Innenseite der Nuten 101, 201 abzustützen.In the assembled state of the coupling device 61, the screw is guided through the recesses in the two clamping elements 62, 63 and then screwed to the nut 71. Since the nut 71 is supported with its outer edges on the inside of the grooves 101, 201, the screw can be turned to tighten the clamping device 64, while the nut 71 does not turn, as it is prevented from turning by this support in the grooves 101, 201.

[0082] The Figures 5a, 5b, 5c and 5d Figures 380 and 380 each show a schematic representation of a further arrangement 380 with the two elements 100 and 200 to be connected, and a further coupling device 81 according to the invention for connecting the two elements 100 and 200. This further coupling device 81 is constructed in many aspects identically to the one shown in Figures 380 and 380. Figures 1a, 1b and 1c Coupling device shown 1. Analogous to the Figures 1a and 1b is in the Figure 5aAn oblique view of an exploded representation of the coupling device 81 and the two elements 100, 200 is shown, while in the Figure 5b An oblique view from the same perspective is shown, with the two elements to be joined, 100 and 200, shown connected by the coupling device 81. Figure 5c is analogous to Figure 1c A top view of the arrangement 380 with the coupling device 81 and the two elements 100, 200 to be connected is shown, in which the viewing direction runs along the longitudinal axis of the coupling device 81. The two elements 100, 200 to be connected are shown connected to each other by the coupling device 81. Figure 5dAdditionally, a side view of the arrangement 380 with the coupling device 81 and the two elements 100, 200 to be connected is shown, in which view the viewing direction is perpendicular to the longitudinal axis of the coupling device 81 or in which the longitudinal axis of the coupling device 81 runs horizontally in the plane of representation.

[0083] In contrast to the Figures 1a and 1b as well as to the Figures 2a, 2b as well as 4a and 4b are also in the Figures 5a and 5b The directions defined for the two clamping parts 82, 83 are shown reversed. Thus, in the illustration in the Figures 5a and 5bThe two clamping parts 82, 83 are shown oriented such that the longitudinal direction of both clamping parts 82, 83 runs from the top left to the bottom right in the illustration, and that the first direction of both clamping parts 82, 83 points from the top right to the bottom left in the illustration, while the second direction points from bottom to top in the illustration. Accordingly, in the Figures 5a and 5b The two clamping parts 82, 83 are shown aligned such that for both clamping parts 82, 83 the third direction in the illustration points from bottom left to top right, while the fourth direction in the illustration points from top to bottom.

[0084] The in the Figures 5a, 5b, 5c and 5d The coupling device 81 shown is, as mentioned, constructed in many aspects the same way as the one in the Figures 1a, 1b and 1cCoupling device 1 shown. In particular, the arrangement of the first projection arrangements 87, 88 and the second projection arrangements 89, 90 on the first clamping part 82 and on the second clamping part 83 is the same as in the Figures 1a, 1b and 1c Coupling device 1 shown. In contrast to the one shown in the Figures 1a, 1b and 1c The coupling device 1 shown is located in the Figures 5a, 5b, 5c and 5dIn the coupling device 81 shown, the two clamping elements 82, 83 are not made of plastic, but of bent sheet steel. Accordingly, the two clamping elements 82, 83 are also not designed as solid components. In both clamping elements 82, 83, a central area of ​​the sheet steel is cut sufficiently wide so that the two lateral edges running along the longitudinal direction of the respective clamping element 82, 83 simultaneously form the respective first projection arrangement 87, 88 and the respective second projection arrangement 89, 90, respectively. In the longitudinal direction of each clamping element 82, 83, a slightly narrower section of the sheet steel is bent at one end to the central area of ​​the sheet steel, forming the functional surface area, and a section of the sheet steel is bent at the other end to form the end area.The effective surface area is bent relative to the central area of ​​the steel sheet in such a way that it forms the respective effective surface 85, 86, which has an orientation like the effective surfaces 5, 6 of the respective clamping part 2, 3 of the . Figures 1a, 1b and 1c The coupling device 1 shown is present. The end regions of the steel sheet are bent at right angles to the central region of the respective steel sheet in both clamping parts 82, 83.

[0085] In both clamping elements 82 and 83, the respective working surface area has a central cutout. Furthermore, each of the two end areas has a recess. These cutouts serve as passages for the clamping device 84, which is designed as a screw. In contrast to the screw of the clamping device 4, which is located in the Figures 1a, 1b and 1cHowever, in the coupling device 1 shown, the screw of the clamping device 84 is designed as a metal screw. Furthermore, the recess in the end region of the steel sheet of the first clamping part 82 has an internal thread so that the screw of the clamping device 84 can be used to clamp the two clamping parts 82, 83 together essentially along a longitudinal axis of the I. <opplungs-einrichtung 81 in das zweite Klemmteil 82 geschraubt werden kann.

[0086] The Figure 6 Figure 1 shows a schematic exploded view of a further arrangement 400 with the two elements 100, 200 to be connected, and a further coupling device 401, not according to the invention, for connecting the two elements 100, 200. This further coupling device 401 corresponds to the second invention mentioned above. It is practically identical to the one shown in the Figures 2a, 2b and 2c The coupling device shown is 21. The illustration also corresponds to the coupling device shown in the Figure 6the directions defined for the first clamping part 402 and the second clamping part 403, the directions defined for the first and second clamping parts 22, 23 in the representations of the Figures 2a and 2b .

[0087] In contrast to the Figures 2a, 2b and 2c The coupling device 21 shown is located in the Figure 6In the coupling device 401 shown, however, the effective surfaces 405, 406 of the two clamping parts 402, 403 are oriented differently. The effective surface 405 of the first clamping part 402 is oriented with respect to the longitudinal direction of the first clamping part 402, with a normal vector perpendicular to the effective surface 405 of the first clamping part 402 having a component pointing in the second direction of the first clamping part 402, but having no component pointing in the first or third direction of the first clamping part 402. The effective surface 406 of the second clamping part 403, on the other hand, is inclined with respect to the longitudinal direction of the second clamping part 403, with a normal vector perpendicular to the effective surface 406 of the second clamping part 406 having a component pointing in the fourth direction of the second clamping part 403, but having no component pointing in the first or third direction of the second clamping part 403.The first and second projection arrangements 407, 408, 409, 410 of the two clamping parts 402, 403 are, however, like the two clamping parts 22, 23 of the in the . Figures 2a, 2b and 2c The coupling device 21 shown is arranged. The clamping arrangement 404 also features the following: Figure 6 The coupling device 400 shown uses the same screw as the one in the Figures 2a, 2b and 2c shown coupling device 21.

[0088] In a variation of the in Figure 6 In the coupling device 401 shown, the two clamping parts can also be made of bent sheet steel, whereby the effective surfaces of the two clamping parts are as shown in the Figure 6 are aligned with the coupling device 401 shown.

[0089] The invention is not limited to the scope of the Figures 1a to 5d The described embodiments are limited. Further variants and variations are readily available to a person skilled in the art, provided they fall within the scope of the claims.

[0090] In summary, it can be stated that a coupling device belonging to the aforementioned technical field is created, which enables the correct positioning of the two elements to be joined in a simple and reliable manner in a reproducible way in a direction transverse to the grooves in the two elements to be joined.

Claims

1. Coupling device (1, 21, 41, 61, 81) for joining two elements (100, 200) to be joined, which two elements (100, 200) each have a notch (101, 201) recessed with at least one recess (102a, 102b, 202a, 202b) on both sides and thus have a notch (101, 201) recessed with at least two recesses (102a, 102b, 202a, 202b), a) wherein the coupling device (1, 21, 41, 61, 81) comprises a first clamping part (2, 22, 42, 62, 82) and a second clamping part (3, 23, 43, 63, 83) and thus two clamping parts (2, 3, 22, 23, 42, 43, 62, 63, 82, 83), - wherein each of the two clamping parts (2, 3, 22, 23, 42, 43, 62, 63, 82, 83) each has a longitudinal direction, a first direction perpendicular to the longitudinal direction, a second direction perpendicular to both the longitudinal direction and the first direction, a third direction opposite to the first direction, and a fourth direction opposite to the second direction, - wherein the first clamping part (2, 22, 42, 62, 82) has an active surface (5, 85), which active surface (5, 85) is inclined towards the longitudinal direction of the first clamping part (2, 22, 42, 62, 82), and the second clamping part (3, 23, 43, 63, 83) has an active surface (6, 86), which active surface (6, 86) is inclined relative to the longitudinal direction of the second clamping part (3, 23, 43, 63, 83), - wherein the first clamping part (2, 22, 42, 62, 82) has a first protrusion arrangement (7, 27, 87) protruding in the first direction of the first clamping part (2, 22, 42, 62, 82) for engaging behind a first of the at least one recess (102a) of the notch (101) in a first of the two elements (100) to be joined, and the second clamping part (3, 23, 43, 63, 83) has a first protrusion arrangement (8, 28, 88) protruding in the first direction of the second clamping part (3, 23, 43, 63, 83) for engaging a first of the at least one recess (202a) of the notch (201) in a second of the two elements (200) to be joined, b) wherein the coupling device (1, 21, 41, 61, 81) has a clamping device (4, 24, 44, 64, 84) for clamping the two clamping parts (2, 3, 22, 23, 42, 43, 62, 63, 82, 83) essentially along a longitudinal axis of the coupling device (1, 21, 41, 61, 81), wherein, in an assembled state of the coupling device (1, 21, 41, 61, 81), the two clamping parts (2, 3, 22, 23, 42, 43, 62, 63, 82, 83) are each aligned with their longitudinal direction substantially along the longitudinal axis of the coupling device (1, 21, 41, 61, 81), while the first direction of the first clamping part (2, 22, 42, 62, 82) and the first direction of the second clamping part (3, 23, 43, 63, 83) are aligned substantially parallel to each other and the second direction of the first clamping part (2, 22, 42, 62, 82) and the second direction of the second clamping part (3, 23, 43, 63, 83) are aligned substantially parallel to each other, and the two clamping parts (2, 3, 22, 23, 42, 43, 62, 63, 82, 83) are each arranged one behind the other along the longitudinal axis with their active surfaces (5, 6, 85, 86) facing each other and can be clamped or are clamped towards each other along the longitudinal axis by the clamping device (4, 24, 44, 64, 84) along the longitudinal axis, wherein, when the two clamping parts (2, 3, 22, 23, 42, 43, 62, 63, 82, 83) are clamped towards each other along the longitudinal axis by the clamping device (4, 24, 44, 85, 86), the first clamping part (2, 22, 42, 62, 82) and the second clamping part (3, 23, 43, 63, 83) are pressed relative to each other in a direction transverse to the longitudinal axis of the coupling device (1, 21, 41, 61, 81) so that the first protrusion arrangement (7, 27, 87) arranged on the first clamping part (2, 22, 42, 62, 82) and the first protrusion arrangement (8, 28, 88) arranged on the second clamping part (3, 23, 43, 63, 83) are pressed towards each other, wherein - a normal vector perpendicular to the active surface (5, 85) of the first clamping part (2, 22, 42, 62, 82) has both a component pointing in the first direction of the first clamping part (2, 22, 42, 62, 82) and a component pointing in the second direction of the first clamping part (2, 22, 42, 62, 82), and that - a normal vector perpendicular to the active surface (6, 86) of the second clamping part (3, 23, 43, 63, 83) has both a component pointing in the third direction of the second clamping part (3, 23, 43, 63, 83) and a component pointing in the fourth direction of the second clamping part (3, 23, 43, 63, 83), wherein the first clamping part (2, 22, 42, 62, 82) has a second protrusion arrangement (9, 29, 89) protruding in the third direction of the first clamping part (2, 22, 42, 62, 82) and the second clamping part (3, 23, 43, 63, 83) has a second protrusion arrangement (10, 30, 90) projecting in the third direction of the second clamping part (3, 23, 43, 63, 83), wherein either c) the second protrusion arrangement (9, 89) of the first clamping part (2, 82) serves to engage a second of the at least two recesses (102b) of the notch (101) in the first of the two elements (100) to be joined, while the second protrusion arrangement (10, 90) of the second clamping part (200) serves to engage a second of the at least two recesses (202b) of the notch (201) in the second of the two elements (200) to be joined, or d) the second protrusion arrangement (29) of the first clamping part (22, 42, 62) serves to engage behind a second of the at least two recesses (202b) of the notch (201) in the second of the two elements to be joined (200), while the second protrusion arrangement (30) of the second clamping part (23, 43, 63) serves to engage behind a second of the at least two recessses (102b) of the notch (101) in the first of the two elements (100) to be joined.

2. Coupling device (1, 21, 41, 61, 81) according to claim 1, characterised in that - in the first clamping part (2, 22, 42, 62, 82), an angle measured in a plane spanned by the longitudinal direction and the first direction between the active surface (5, 85) and the first direction is at least 30°, that - in the first clamping part (2, 22, 42, 62, 82), an angle measured in a plane spanned by the longitudinal direction and the second direction between the active surface (5, 85) and the second direction is at least 30°, that - in the second clamping part (3, 23, 43, 63, 83), an angle measured in a plane spanned by the longitudinal direction and the third direction between the active surface (6, 86) and the third direction is at least 30°, and that - in the second clamping part (3, 23, 43, 63, 83), an angle measured in a plane spanned by the longitudinal direction and the fourth direction between the active surface (6, 86) and the fourth direction is at least 30°.

3. Coupling device (1, 21, 41, 61, 81) according to claim 1 or 2, characterised in that - in the first clamping part (2, 22, 42, 62, 82), an angle measured in a plane defined by the longitudinal direction and the first direction between the active surface (5, 85) and the first direction is at most 60°, that - in the first clamping part (2, 22, 42, 62, 82), an angle measured in a plane defined by the longitudinal direction and the second direction between the active surface (5, 85) and the second direction is at most 60°, that - in the second clamping part (3, 23, 43, 63, 83), an angle measured in a plane defined by the longitudinal direction and the third direction between the active surface (6, 86) and the third direction is at most 60°, and that - in the second clamping part (3, 23, 43, 63, 83), an angle measured in a plane defined by the longitudinal direction and the fourth direction between the active surface (6, 86) and the fourth direction is at most 60°.

4. Coupling device (1, 21, 41, 61, 81) according to one of claims 1 to 3, characterised in that the first protrusion arrangement (7, 27, 87) of the first clamping part (2, 22, 42, 62, 82) is arranged on a half of the first clamping part (2, 22, 42, 62, 82) lying in the second direction of the first clamping part (2, 22, 42, 62, 82) and that the first protrusion arrangement (8, 28, 88) of the second clamping part (3, 23, 43, 63, 83) is arranged on a half of the second clamping part (3, 23, 43, 63, 83) lying in the fourth direction of the second clamping part (3, 23, 43, 63, 83).

5. Coupling device (1, 21, 41, 61, 81) according to one of claims 1 to 4, characterised in that the first protrusion arrangement (7, 27, 87) of the first clamping part (2, 22, 42, 62, 82), viewed in the longitudinal direction of the first clamping part (2), in a region of a first end of the first clamping part (2, 22, 42, 62, 82) opposite to the active surface of the first clamping part (2, 22, 42, 62, 82), forms a protrusion for engaging behind the first of the at least one recess (102a) of the notch (101) in the first of the two elements (100) to be joined, and that the first protrusion arrangement (8, 28, 88) of the second clamping part (3, 23, 43, 63, 83), viewed in the longitudinal direction of the second clamping part (3, 23, 43, 63, 83), in a region of a first end of the second clamping part (3, 23, 43, 63, 83) opposite to the active surface of the second clamping part (3, 23, 43, 63, 83), forms a protrusion for engaging behind the first of the at least one recess (202a) of the notch (201) in the second of the two clamping parts (200) to be joined.

6. Coupling device (1, 81) according to one of claims 1 to 5, characterised in that the second protrusion arrangement (9, 89) of the first clamping part (2, 82) serves to engage behind the second of the at least two recess (102b) of the notch (101) in the first of the two elements (100) to be joined, while the second protrusion arrangement (10, 90) of the second clamping part (3, 83) serves to engage behind the second of the at least two recess (202b) of the notch (201) in the second of the two elements (200) to be joined, wherein the second protrusion arrangement (9, 89) of the first clamping part (2, 82) is arranged on the first clamping part (2, 82) starting from the first protrusion arrangement (7, 87) of the first clamping part (2, 82) (2, 82) in the third direction of the first clamping part (2, 82), and wherein the second protrusion arrangement (10, 90) of the second clamping part (3, 83) is arranged starting from the first protrusion arrangement (9, 89) of the second clamping part (3, 83) in the third direction of the second clamping part (3, 83) on the second clamping part (3, 83).

7. Coupling device (1, 81) according to claim 6, characterised in that the second protrusion arrangement (9, 89) of the first clamping part (2, 82) is arranged on the half of the first clamping part (2, 82) lying in the second direction of the first clamping part (2, 82) (2, 82) and that the second protrusion arrangement (10, 90) of the second clamping part (3, 83) is arranged on the half of the second clamping part (3, 83) lying in the fourth direction of the second clamping part (3, 83).

8. Coupling device (22, 42, 62) according to one of claims 1 to 5, characterised in that the second protrusion arrangement (28) of the first clamping part (22, 42, 62) serves to engage behind the second of the at least two recesses (202b) of the notch (202) in the second of the two elements to be joined (200), while the second protrusion arrangement (30) of the second clamping part (23, 43, 63) serves to engage behind the second of the at least two recesses (102b) of the notch (101) in the first of the two elements (100) to be joined, wherein the second protrusion arrangement (28) of the first clamping part (22, 42, 62) is arranged on the first clamping part (22, 42, 62) in a fifth direction of the first clamping part (22, 42, 62) (22, 42, 62) starting from the first protrusion arrangement (27) of the first clamping part (22, 42, 62), which fifth direction of the first clamping part (22, 42, 62) has a component in the fourth direction of the first clamping part (22, 42, 62) and a component in the third direction of the first clamping part (22, 42, 62), wherein the second protrusion arrangement (30) of the second clamping part (23, 43, 63) is arranged on the second clamping part (23, 43, 63) in a fifth direction of the second clamping part (23, 43, 63) starting from the first protrusion arrangement (28) of the second clamping part (23, 43, 63) (23, 43, 63), which fifth direction of the second clamping part (23, 43, 63) has a component in the second direction of the second clamping part (23, 43, 63) and a component in the third direction of the second clamping part (23, 43, 63).

9. Coupling device (21, 41, 61) according to claim 8, characterised in that the second protrusion arrangement (28) of the first clamping part (22, 42, 62) is arranged on a half of the first clamping part (22, 42, 62) lying in the fourth direction of the first clamping part (22, 42, 62) 42, 62) and that the second protrusion arrangement (30) of the second clamping part (23, 43, 63) is arranged on a half of the second clamping part (23, 43, 63) lying in the second direction of the second clamping part (23, 43, 63).

10. Coupling device (21, 41, 61) according to claim 8 or 9, characterised in that the component of the fifth direction of the first clamping part (22, 42, 62) directed in the fourth direction of the first clamping part (22, 42, 62) is approximately equal in magnitude to the component of the fifth direction of the first clamping part (22, 42, 62) directed in the third direction of the first clamping part (22, 42, 62), wherein the component of the fifth direction of the second clamping part (23, 43, 63) directed in the second direction of the second clamping part (23, 43, 63) is approximately equal in magnitude to the component of the fifth direction of the second clamping part (23, 43, 63) directed in the third direction of the second clamping part (23, 43, 63).

11. Coupling device (1, 21, 41, 61, 81) according to one of claims 1 to 10, characterised in that the two clamping parts (2, 3, 22, 23, 42, 43, 62, 63, 82, 83) are each made of a plastic or a metal, in particular aluminium or steel.

12. Coupling device (81) according to any one of claims 1 to 11, characterised in that the two clamping parts (82, 82) are each made of bent sheet steel.

13. Coupling device (1, 21, 41, 61, 81) according to one of claims 1 to 12, characterised in that the clamping device (4, 24, 44, 64, 84) comprises a screw.

14. Arrangement (300, 320, 340, 360, 380) comprising two elements (100, 200) to be joined, which elements (100, 200) each have a notch (101, 201) recessed by at least one recess (102a, 102b, 202a, 202b), in particular a notch (101, 201) recessed on both sides with at least one recess (102a, 102b, 202a, 202b) and thus with at least two recesses (102a, 102b, 202a, 202b), and which arrangement (300, 320, 340, 360, 380) comprises at least one coupling device (1, 21, 41, 61, 81) according to one of claims 1 to 13.