FASTENING DEVICE

Description

[0001] The invention relates to a fastening device and a method for detachably connecting two components with such a fastening device.

[0002] In building construction and furniture manufacturing, fastening devices are primarily used to connect two or more abutting components. In furniture making, for example, furniture connectors or fittings are used to join the components of a disassembled furniture carcass. These components are usually wooden parts such as base panels, top panels, side panels, or other frame and support elements for cabinets, beds, or tables.

[0003] In building construction, however, such as in the construction of wooden houses, it is often necessary to connect wooden components with concrete components. This could involve, for example, wooden wall elements that need to be connected to a concrete foundation.

[0004] WO 03027510 A2 relates to a device and a method for detachably connecting two abutting components. The device comprises a rod-shaped connecting element and a cylindrical rotatable locking element. The connecting element is fixedly attached to a first component, and the locking element is recessed into a second component. The second component has a passage through which the attached connecting element can be brought into contact with the recessed locking element. For this purpose, the connecting element has an engagement element that fits into a corresponding lateral recess in the locking element, whereby a positive-locking connection between the connecting element and the locking element is achieved by rotating the locking element.

[0005] German patent application DE 20 2014 103 040 U1 discloses a slotted connector system comprising a first connector part, a locking element, and a second connector part. The first connector part has a recess for the cylindrical locking element and a through-hole along one longitudinal axis for a pin of the second connector part. The pin of the second connector part fits into a lateral recess of the locking element, so that by rotating the locking element, the first connector part, the locking element, and the second connector part can be positively connected to each other. Furthermore, the first connector part and the second connector part each have two threads along their longitudinal axes, allowing them to be connected to a component using screws.

[0006] DE 20 2005 009 719 U1 discloses a fastening arrangement for furniture components, in particular table furniture components. The furniture component has a plate that can be connected to a support component. For the connection, an insert part, which can be positioned on the plate, and a connecting part, which can be positioned on the support component, are provided. The insert part and the connecting part can be detachably connected to each other by means of a bayonet fitting.

[0007] US Patent 9,945,408 B2 describes a coupling device comprising a male and a female component. The female component has several projections that engage in grooves of the male component. Rotating the male component within the female component creates a bayonet-like connection between the two components.

[0008] DE 10 2015 219 778 B4 discloses a furniture connector assembly comprising an elongated insert, a rod-shaped connecting element, and a pin-shaped fixing element. The insert has a thread and is inserted into a first component. The first component also has a through-opening along a transverse axis of the insert, into which the fixing element can be inserted. The connecting element is attached to a second component. The insert has an opening for the connecting element along a longitudinal axis and a recess for the fixing element along a transverse axis. The fixing element can thus be positively connected to the connecting element inserted into the insert.

[0009] German patent application DE 20 2017 002 531 U1 discloses a cabinet connector in which a rod-shaped dowel with a thread is attached to a first component. A cylindrical housing is recessed into a second component, the second component having a through-opening through which the dowel is guided to the housing. The housing has a lateral recess into which the dowel is inserted and a second recess into which a threaded stud is inserted such that it can form a force-fit connection with the dowel.

[0010] German patent DE 298 22 032 U1 relates to a fastening and laminating sleeve for securing a pipe or profile bar to a surface. The sleeve is designed to simultaneously protect and aesthetically bridge or conceal any gap that arises at the joint between the end face of the pipe or profile bar and the surface. For this purpose, the sleeve consists of a fastening and laminating sleeve and an adapter, the fastening and laminating sleeve being slid onto the adapter. The fastening and laminating sleeve is a smooth, hollow cylindrical body. The adapter is detachably connected to the base, for example. A bayonet fitting may be provided to secure the fastening and laminating sleeve to the adapter. The bayonet fitting serves to secure the fastening and laminating sleeve to the adapter in a final step after it has been slid onto the adapter.Since the adapter is already screwed in place at this point, this can only be done by rotating the mounting and lamination sleeve. The adapter is not mounted on a rotating bearing.

[0011] WO 2018 / 142098 A1 concerns a securing device for attaching lightweight components, such as acoustic panels. It consists of an insertion assembly designed for countersinking into a lightweight panel and a fastening assembly designed for attaching the insertion assembly to a connector. The connector is designed such that the securing device can be connected to an elongated suspension element. Additionally, a passage is defined in both the insertion assembly and the fastening assembly to allow the suspension element to be inserted through the securing device.

[0012] The object of the present invention is to provide a fastening device with which two components can be detachably connected, wherein the connection is simple, stable and reliable.

[0013] In particular, the object of the present invention is to provide a fastening device with which a prefabricated component and / or a wooden component can be easily and reliably connected to a prefabricated component and / or a concrete component.

[0014] One or more of these tasks are solved by the fastening device according to the independent claim. Advantageous embodiments are specified in the dependent claims.

[0015] According to the present invention, a fastening device is provided. The fastening device comprises a fastening element and a counter-fastening element. The fastening element is designed such that it can be countersunk and fastened in a first component. The counter-fastening element has a thread to allow it to be screwed to a retaining element cast into or otherwise attached to a second component. The fastening element and the counter-fastening element form a bayonet fitting, and the counter-fastening element is rotatably mounted on the retaining element about an axis of rotation by means of the screw connection, whereby rotating the counter-fastening element about the axis of rotation releases the counter-fastening element from the retaining element.can be pulled onto the retaining element, whereby when the counter-fastening element is released from the retaining element the bayonet lock is opened and when the counter-fastening element is pulled onto the retaining element the bayonet lock is closed.

[0016] The first component is preferably a wooden component and the second component is a concrete component.

[0017] One or both of the components can be prefabricated components, especially made of wood, concrete and / or steel.

[0018] The invention's concept involves, in a first step, countersinking and securing the fastening element in the first component. The counter-fastening element is then screwed to the retaining element cast into or connected to the second component. In a second step, the first component with the fastening element and the second component with the counter-fastening element are brought into contact in such a way that the bayonet fitting formed by the fastening element and the counter-fastening element can be closed. Loosening and tightening the counter-fastening element, as well as opening and closing the bayonet fitting, is achieved by rotating the counter-fastening element around the same axis of rotation.The bayonet fitting creates a positive connection between the fastening element and the counter-fastening element, preventing the fastening element from being pulled out or falling out of the counter-fastening element.

[0019] According to the invention, the direction of rotation with which the counter-fastening element is screwed to the retaining element is the same as the direction of rotation with which the bayonet fitting is closed. Thus, a rotation of the counter-fastening element around its axis of rotation can be used to finally screw the counter-fastening element to the retaining element and simultaneously close the bayonet fitting, creating a positive-locking connection between the fastening element and the counter-fastening element. This allows two components to be fastened together in a simple and secure manner. Only a small amount of space is required between the two components to allow the counter-fastening element to rotate.

[0020] Disassembly of the components, especially the wooden component from the concrete component, is also easily accomplished. Turning the counter-fastening element in the opposite direction simultaneously opens the bayonet fitting and releases the counter-fastening element from the retaining element.

[0021] The adapter described above, according to DE 298 22 032 U1, can be connected to a wall or floor in a rotationally fixed manner by means of a screw bolt, so that it cannot be rotated to form a coupling with the laminating sleeve. In this known device, the screw connection thus serves only for fastening and not as a bearing for rotating the adapter. The counter-fastening element of the present invention, on the other hand, is rotatably mounted on the retaining element and connected to it by means of a screw connection. The screw connection simultaneously fulfills two functions: the rotatable mounting of the counter-fastening element on the retaining element and the fastening of the counter-fastening element to the fastening element or to the first component. A rotational movement of the counter-fastening element closes the bayonet fitting, which releasably secures the counter-fastening element to the fastening element.Simultaneously, the counter-fastening element can be detachably fixed to the retaining element by means of the screw connection. Conversely, this applies accordingly if one wishes to detach the counter-fastening element from the fastening element or retaining element. Such a dual function of the screw connection is not apparent from DE 298 22 032 U1.

[0022] It is also possible that the direction of rotation with which the counter-fastening element is screwed to the retaining element and the direction of rotation with which the bayonet fitting is closed are opposite to each other. In this case, the counter-fastening element must be slightly loosened from the retaining element when the bayonet fitting is closed.

[0023] The retaining element can be a threaded rod with an external thread, and the counter-fastening element can have a blind hole with an internal thread to engage with the external thread of the threaded rod.

[0024] The retaining element can be a sleeve with an internal thread and the counter-fastening element can have a projection with an external thread to engage with the internal thread of the sleeve.

[0025] The counter-fastening element allows for height adjustment of the support element. Depending on how far the counter-fastening element is screwed along the support element, it defines the distance between the first and second components. This can be used, for example, when the first components, especially wooden ones, are ceiling elements that need to be installed at different heights for practical or aesthetic reasons.

[0026] Preferably, the retaining element is designed as a threaded rod, and the counter-fastening element has a blind hole with an internal thread. This requires less space between the first and second components to allow for rotation of the counter-fastening element, as the counter-fastening element is screwed onto the threaded rod and remains accessible at the threaded rod.

[0027] The fastening element may have a centering element, and the counter-fastening element may have a counter-centering element on a side pointing away from the holding element, wherein the centering element is designed to engage precisely with the counter-centering element.

[0028] The centering element and counter-centering element simplify assembly, as the fastener and counter-fastening element are centered simply by being brought together. Furthermore, the centering element and counter-centering element ensure that the fastener and counter-fastening element interlock precisely, thus forming a stable connection without play.

[0029] The centering element can be designed as a conically tapered blind hole and the counter-centering element can be a conically tapered tip, or the centering element can be a conically tapered tip and the counter-centering element can be designed as a conically tapered blind hole.

[0030] Preferably, the centering element is designed as a conically tapered blind hole and the counter-centering element is a conically tapered tip.

[0031] The fastening element may have a locking element and the counter-fastening element may have a counter-locking element, wherein the counter-locking element can engage with the fastening element in such a precise manner that the fastening element and the counter-locking element form the bayonet lock.

[0032] A bayonet fitting is a fitting for forming a positive locking connection by means of a rotation, preferably less than 360°, in which one or more projections engage in corresponding recesses.

[0033] The locking element and the counter-locking element form the bayonet fitting, thus ensuring a reliable connection between the fastening element and the counter-fastening element.

[0034] The locking element can be at least a recess in the fastening element and the counter-locking element can have at least a projection formed on the counter-fastening element, or the locking element can have at least a projection formed on the fastening element and the counter-locking element can be at least a recess in the counter-fastening element.

[0035] Preferably, the locking element is formed by two recesses in the fastening element. The recesses extend laterally outwards from the blind-hole-shaped centering element and are arranged diametrically opposite each other with respect to it. These two locking recesses run along a longitudinal axis of the fastening element and are angled at an angle in a region away from an end face where the blind-hole-shaped centering element and the two locking recesses open, so that the locking recesses form an approximately L-shaped path in side view for receiving corresponding counter-locking elements.

[0036] The locking elements are preferably formed by two opposing pins integrally molded onto the counter-fastening element. The locking recesses of the fastening element are designed such that, when brought together, they receive the pins of the counter-fastening element with minimal play, and when the counter-fastening element is rotated, they guide the pins in such a way that the bayonet lock is opened or closed.

[0037] The counter-fastening element can have a tool contour on its circumference for the positive engagement of a tool.

[0038] The tool contour is preferably formed from six straight outer edges that create a hexagon. This allows the tool contour to be gripped with a wrench to turn the opposing fastening element.

[0039] The fastening element may have at least one bore extending parallel to the axis of rotation in order to fasten the fastening element in the first component by means of a screw.

[0040] At least one bore in the fastener extends into the fastener in such a way that it remains accessible even when the fastener is fully recessed in the first component. The simplest way to ensure this is to position the bore parallel to the axis of rotation in the fastener. This allows the fastener to be easily and readily screwed to the first component, and the fastener's centering element is also easily accessible.

[0041] The thread of the counter-fastening element can be aligned in such a way that by turning the counter-fastening element, the counter-fastening element is simultaneously pulled onto the second component and the bayonet fitting is closed.

[0042] With this design, it is possible to use a rotation of the counter-fastening element around the axis of rotation to finally screw the counter-fastening element onto the retaining element and simultaneously close the bayonet lock in order to create a positive locking connection between the fastening element and the counter-fastening element.

[0043] Furthermore, a method according to the invention for fastening a first component, in particular a wooden component, to a second component, in particular a concrete component, by means of a fastening device is provided, comprising the steps of Countersinking a fastening element in the first component, securing the fastening element in the first component, screwing a counter-fastening element to a retaining element attached to or cast into the second component, joining the first component with the fastening element and the second component with the counter-fastening element, engaging a counter-locking element of the counter-fastening element with a locking element of the fastening element and rotating the counter-fastening element around one axis of rotation to close a bayonet lock.

[0044] The advantages described above with reference to the fastening device apply analogously to the method according to the invention.

[0045] Further object, feature and advantage of the present invention will become apparent from the description and the exemplary embodiment shown in the accompanying drawings. These show in:Figure 1 is a schematic representation of a fastening element of a fastening device according to the invention; Figure 2 is a schematic representation of the fastening element in a top view; Figure 3 is a schematic representation of the fastening element in a side sectional view; Figure 4 is a schematic representation of the fastening element, countersunk in a first component, in particular in a wooden component, in a side sectional view; Figure 5 is a schematic representation of a counter fastening element of a fastening device according to the invention in a side sectional view; Figure 6 is a schematic representation of the counter fastening element in a further side sectional view; Figure 7 is a schematic representation of the counter fastening element in a top view; and Figure 8 is a schematic representation of the counter fastening element, by means of a threaded rod with a second component, in particular a concrete component.connected, in a lateral sectional view.

[0046] In the following, a fastening device 1 according to the invention is described in more detail by way of example using an embodiment ( Figs. 1-8 ).

[0047] The fastening device 1 according to the invention comprises a fastening element 2 ( Figs. 1-4 ) and a counter-fastening element 3 ( Figs. 5-8 ).

[0048] The fastening element 2 is a cylindrical body and has an end face 4. Opposite the end face 4 is a bottom surface 5. The end face 4 and the bottom surface 5 are connected to each other via a radially circumferential surface 6. A longitudinal axis 8 extends from the bottom surface 5 to the end face 4.

[0049] The counter-fastening element 3 is a substantially cylindrical body and has a radially circumferential wall 15. The counter-fastening element 3 has a longitudinal axis 18. A blind hole 19 is arranged along the longitudinal axis 18 at the center of the counter-fastening element 3. The blind hole 19 has an internal thread.

[0050] A wooden component 21 and a concrete component 23 are provided. The wooden component 21 has a milled recess. The recess is designed to receive the fastening element 2 such that the end face 4 of the fastening element 2 is flush with a surface of the wooden component 21. The concrete component 23 has a retaining element 22. The retaining element 22 is a threaded rod with an external thread cast into the concrete component 23. The internal thread of the blind hole 19 of the counter-fastening element 3 is designed to engage with the external thread of the threaded rod.

[0051] At the center of the end face 4, the fastening element 2 has a centering element 7. The centering element 7 is a circular, conically tapered blind hole that extends along the longitudinal axis 8 towards the base surface 5.

[0052] At one end opposite the opening of the blind hole 19, the counter-fastening element 3 has a counter-centering element 16 on its outer side. The counter-centering element 16 is designed as a conically tapered, flattened tip.

[0053] The centering element 7 of the fastening element 2 is designed, on the one hand, to receive the counter fastening element 3 and, at the same time, to precisely receive the counter centering element 16 of the counter fastening element 3.

[0054] In the area of ​​the centering element 7, the fastening element 2 has a locking element 10. The locking element 10 is formed by two recesses in the fastening element. The recesses extend laterally outwards from the blind-hole-shaped centering element 7 and are arranged diametrically opposite each other with respect to it, so that a small web 11 is formed between the recesses and the outer surface 6.

[0055] These two locking recesses run along the longitudinal axis 8 of the fastening element 2 and are angled at an area away from the end face 4, where the blind-hole centering element 7 and the two locking recesses open, so that the locking recesses form an approximately L-shaped path in the side view for receiving corresponding counter-locking elements 20.

[0056] Approximately in the area of ​​the counter-centering element 16, the counter-fastening element has 3 counter-locking elements 20. The counter-locking elements 20 are two opposing projections formed on the wall 15. The projections are designed as pins, each protruding vertically from the wall 15.

[0057] The locking element 10 of the fastening element 2 is designed to receive the mating locking elements 20 of the mating fastening element 3 with minimal play. Together they form a bayonet fitting. The mating fastening element 3 is inserted into the fastening element 2 and, upon reaching a stop, is rotated about a pivot axis parallel to the longitudinal axes 8, 18 such that the pins of the mating locking element 20 follow the locking recesses of the locking element 10 along a transverse axis 12 and close the bayonet fitting.

[0058] Preferably, the internal thread of the blind hole bore 19 of the counter fastening element 3 is aligned such that by rotating the counter fastening element 3 about the axis of rotation 8, 18, the counter fastening element 3 is simultaneously pulled onto the concrete component 23 and the bayonet lock between the locking element 10 of the fastening element 2 and the counter locking elements 20 of the counter fastening element 3 is closed.

[0059] In a region of the opening of the blind hole 19, a tool contour 17 for positive engagement of a tool is formed on the circumference of the counter-fastening element 3. The tool contour 17 has six straight outer edges that form a hexagon, with the distance between the opposing outer edges approximately corresponding to the diameter of the counter-fastening element 3. The tool contour 17 thus corresponds to the circumferential shape of a conventional nut and can be actuated with a suitable wrench.

[0060] In the outer surface 6 of the fastening element 2, two opposing recesses 13 are provided, which run along the transverse axis 12 in a manner complementary to the locking recesses of the locking element 10.

[0061] In the end face 4, two opposing bores 14 are formed between the centering element 7 and the outer surface 6. The bores 14 extend continuously along the longitudinal axis 8 from the end face 4 to the bottom surface 5. The bores 14 are designed to receive screws and to firmly connect the fastening element 2 to the wooden component 21.

[0062] The fastening element 2 and the counter-fastening element 3 can be made of steel, aluminum, or another metal. It is also possible to make the fastening element 2 and the counter-fastening element 3 from plastic. Preferably, the fastening element 2 and the counter-fastening element 3 are manufactured using an injection molding process. This allows for cost-effective production of large quantities.

[0063] In a preferred embodiment, the fastening element 2 and the counter-fastening element 3 have a sound-dampening device. For example, an intermediate piece made of plastic can be provided, which is arranged in or on the fastening element 2 or on the counter-fastening element 3. Preferably, the intermediate piece made of plastic is integrated into the centering element 7 of the fastening element 2 and additionally provides a spring effect between the fastening element 2 and the counter-fastening element 3. For example, the fastening element 2 can also have a plastic sheathing. The intermediate piece made of plastic or the plastic sheathing provides a sound-dampening effect.

[0064] The design of the fastening element 2 and / or the counter-fastening element 3 from a light metal, such as aluminium or an aluminium alloy, also offers low sound transmission and contributes to sound insulation.

[0065] In the above embodiment, a wooden component 21, into which the fastening element 2 is countersunk, and a concrete component 23 with the retaining element 22, to which the counter-fastening element 3 is screwed, are provided. It is also possible to countersink the fastening element 2 in a concrete component instead of the wooden component 21. In this way, two concrete components, preferably precast concrete components, can be connected to each other using the fastening element 2 and the counter-fastening element 3. Alternatively, instead of the concrete component 23, it is also possible to screw the counter-fastening element 3 to a wooden component using the retaining element 22. In this way, two wooden components, preferably precast wooden components, can be connected to each other. It is also possible to provide steel components instead of the wooden component 21 and the concrete component 23, in which the fastening element 2 is countersunk and to which the counter-fastening element 3 is screwed using the retaining element 22, respectively.This allows two steel components, preferably prefabricated steel components, to be joined together.

[0066] A method for detachably connecting a first component and a second component with a fastening device 1 according to the invention is explained below.

[0067] The first component is the wooden component 21 and the second component is the concrete component 23. The concrete component 23 has a retaining element 22 in the form of a threaded rod, which is firmly connected to the concrete component 23.

[0068] The fastening element 2 is countersunk into a designated recess in the wooden component 21, so that the end face 4 is flush with the surface of the wooden component 21. The fastening element 2 is firmly connected to the wooden component 21 by means of screws that pass through the holes 14 of the fastening element 2.

[0069] Using the tool contour 17, the counter-fastening element 3 with the internal thread of the blind hole bore 19 is screwed onto the threaded rod of the concrete component 23. For this purpose, a wrench is placed on the tool contour 17 and rotated about the axis of rotation 8, 18.

[0070] In a pre-assembled state, the fastening element 2 is thus recessed in the wooden component 21 such that the end face 4 of the fastening element 2 is flush with a surface of the wooden component 21. Simultaneously, the counter-fastening element 3 is attached to the concrete component 23 such that the internal thread of the blind hole 19 of the counter-fastening element 3 engages with the external thread of the threaded rod.

[0071] The wooden component 21 is inserted onto the counter-fastening element 3 on the concrete component 23 along the longitudinal axes 8, 18 using the fastening element 2 and pressed in until it stops. In doing so, the counter-fastening element 3 slides into the centering element 7 of the fastening element 2, and the counter-centering element 16 of the counter-fastening element 3 is precisely received by the centering element 7 of the fastening element 2. Simultaneously, the pins of the counter-locking element 20 of the counter-fastening element 3 slide into the corresponding locking recesses of the locking element 10 of the fastening element 2.

[0072] By rotating the counter-fastening element 3 about the axis of rotation 8, 18, the pins of the counter-locking element 20 of the counter-fastening element 3 follow the locking recesses of the locking element 10 of the fastening element 2 along the transverse axis 12 and create a positive locking connection between the fastening element 2 and the counter-fastening element 3. Thus, the bayonet lock between the locking element 10 of the fastening element 2 and the counter-locking elements 20 of the counter-fastening element 3 is closed.

[0073] In its assembled state, the counter-fastening element 3 is thus positively engaged with the fastening element 2, and the bayonet fitting between the locking element 10 of the fastening element 2 and the counter-locking elements 20 of the counter-fastening element 3 is closed. In this state, it is prevented that the fastening element 2 may be pulled out or fall out of the counter-fastening element 3.

[0074] Preferably, the internal thread of the blind hole 19 of the counter-fastening element 3 is aligned such that rotating the counter-fastening element 3 about the axis of rotation 8, 18 simultaneously tightens the counter-fastening element 3 onto the threaded rod and closes the bayonet fitting. Thus, rotating the counter-fastening element 3 about the axis of rotation 8, 18 simultaneously achieves final fixing of the counter-fastening element 3 onto the threaded rod and closing of the bayonet fitting. Reference symbol list

[0075] 1 Fastening device 2 Fastening element 3 Counter fastening element 4 End face 5 Bottom face 6 Shell face 7 Centering element 8 Longitudinal / rotational axis 10 Locking element 11 Web 12 Transverse axis 13 Recess 14 Bore 15 Wall 16 Counter centering element 17 Tool contour 18 Longitudinal / rotational axis 19 Blind hole 20 Counter locking element 21 Wooden component 22 Retaining element 23 Concrete component

Claims

1. A fastening device (1), comprising a fastening element (2) and a counter-fastening element (3), wherein the fastening element (2) is designed such that it can be sunk and fastened in a first component, in particular a wooden component (21), wherein the counter-fastening element (3) comprises a thread so that it can be connected, in a screwable manner, to a retaining element (22) fastened to or cast in a second component, in particular a concrete component (23), wherein the fastening element (2) and the counter-fastening element (3) form a bayonet lock and the counter-fastening element (3) is rotatably mounted on the retaining element (22) by means of the screw connection about a rotational axis (8, 18), characterized in that by rotating the counter-fastening element (3) about the rotational axis (8, 18), the counter-fastening element (3) can be detached from the retaining element (22) or pulled to the retaining element (22), whereby the bayonet lock is opened when the counter-fastening element (3) is detached from the retaining element (22) and the bayonet lock is closed when the counter-fastening element (3) is pulled to the retaining element (22).

2. The fastening device (1) according to claim 1, characterized in that the retaining element is a threaded rod (22) with an external thread and the counter-fastening element (3) comprises a blind hole (19) with an internal thread to engage with the external thread of the threaded rod.

3. The fastening device (1) according to claim 1, characterized in that the retaining element is a sleeve with an internal thread and the counter-fastening element (3) comprises a projection with an external thread to engage with the internal thread of the sleeve.

4. The fastening device (1) according to any one of claims 1 to 3, characterized in that a centering element (7) is provided on the fastening element (2) and the counter-fastening element (3) comprises a counter-centering element (16) on a side facing away from the retaining element, the centering element (7) being designed for precise engagement with the counter-centering element (16).

5. The fastening device (1) according to claim 4, characterized in that the centering element is designed as a conically tapered blind hole (7) and the counter-centering element is a conically tapered tip (16), or the centering element is a conically tapered tip and the counter-centering element is designed as a conically tapered blind hole.

6. The fastening device (1) according to any one of claims 1 to 5, characterized in that a locking element (10) is provided on the fastening element (2) and the counter-fastening element (3) comprises a counter-locking element (20), wherein the counter-locking element (20) can engage with the locking element (10) with such a precise fit that the locking element (10) and the counter-locking element (20) form the bayonet lock.

7. The fastening device (1) according to claim 6, characterized in that the locking element (10) is at least one recess in the fastening element (2) and the counter-locking element (20) comprises at least one projection formed on the counter-fastening element (3), or the locking element (10) comprises at least one projection formed on the fastening element (2) and the counter-locking element (20) is at least one recess in the counter-fastening element (3).

8. The fastening device (1) according to any one of claims 1 to 7, characterized in that the counter-fastening element (3) comprises a tool contour (17) on its circumference for form-fitting engagement with a tool.

9. The fastening device (1) according to any one of claims 1 to 8, characterized in that the fastening element (2) comprises at least one bore (14) extending parallel to the rotational axis (8, 18) in order to fasten the fastening element (2) in the first component by means of a screw.

10. The fastening device (1) according to any one of claims 1 to 9, characterized in that the thread of the counter-fastening element (3) is aligned in such a way that, by turning the counter-fastening element (3), the counter-fastening element (3) is pulled to the second component and simultaneously the bayonet lock is closed.

11. A method for fastening a first component, in particular a wooden component (21), to a second component, in particular a concrete component (23), by means of a fastening device (1) according to any one of claims 1 to 10, comprising the steps of countersinking a fastening element (2) in the first component, fastening the fastening element (2) in the first component, connecting, in a screwable manner, a counter-fastening element (3) to a retaining element (22) fastened to or cast in the second component, combining the first component including the fastening element (2) and the second component including the counter-fastening element (3), engaging a counter-locking element (20) of the counter-fastening element (3) with a locking element (10) of the fastening element (2), and rotating the counter-fastening element (3) about a rotational axis (8, 18) to close a bayonet lock.

12. The method according to claim 11, characterized in that the first and / or second components are prefabricated components.

13. The method according to claim 11 or 12, characterized in that the first component is made of wood, concrete, and / or metal.

14. The method according to any one of claims 11 to 13, characterized in that the second component is made of wood, concrete and / or metal.