FASTENING DEVICE

Abstract

The invention relates to a fastening device, in particular as part of a fastening system for detachably fixing components (42,44) to one another, such as wall coverings to walls, preferably in the field of interiors of any type, said fastening device having a support part (2), which has a support plate (12) for protruding closure elements (24) on one side and a protruding fixing part (4) with at least one fixing means (26) on the other, opposite side (8). The fastening device is characterised in that the fixing part (4) has an axial length which is preferably less than or equal to each radial length of the support part (2) extending transversely thereto, the respective fixing means (26) of the fixing part (4) is self-locking or self-tapping, and the support plate (12) has a cut-out (36) for application of an operating tool, said cut-out extending from the support plate (12) into the fixing part (4) and being left free by the closure elements (24).

Claims

1. A fastening device, in particular as part of a fastening system for detachably fixing components to one another, such as wall coverings to ceilings and walls, preferably in the area of interior rooms of any kind, having a support part (2), which has a support plate (12) for protruding surface-type fasteners on its one side and the has a protruding fixing part (4) on its opposite other side (8), which fixing part has at least one fixing means (26) characterized in that the fixing part (4) has an axial length, which is preferably less than or equal to each radial length of the support part (2) extending transverse thereto, the relevant fixing means (26) of the fixing part (4) is self-locking or self-tapping and the support plate (12) has a recess (36) for the engagement with an actuating tool, which, starting from the support plate (12), extends into the fixing part (4) and which is released from the surface-type fasteners (24).

2. The fastening device according to claim 1, characterized in that the support part (2) having the fixing part (4) and the respective fixing means (26) are integrally formed from a plastic injection molded part.

3. The fastening device according to claim 1, characterized in that the surface-type fasteners (24) are wholly or partially formed of hoops, loops, hooks, mushrooms or stems with thickenings arranged at the end or at the head.

4. The fastening device according to claim 1, characterized in that the relevant fixing means is formed of at least one thread (26), which is guided around the pin-like fixing part (4) and preferably extends from the rear (8) of the support plate (12) to the free end or a free end area (18) of the fixing part (4).

5. The fastening device according to claim 1, characterized in that the relevant thread (26) is interrupted viewed in the longitudinal direction of the pin-like fixing part (4) to form at least one receiving groove (30, 34), there is preferably a group of several receiving grooves (30, 34), which form a longitudinal channel (28) in superposition in parallel to the longitudinal direction of the fixing part (4), and further preferably, there are at least two such longitudinal channels (28), which are particularly preferably arranged diametrically opposite the longitudinal axis of the fixing part (4) and only pass through the respective thread (26).

6. The fastening device according to claim 1, characterized in that for two longitudinal channels (28) opposite to each other, viewed in the circumferential direction, the one ends (30) of the threads (26) each define a side wall located on a common radial center transverse axis (32) of the support part (2) of the relevant longitudinal channel (28) and the other ends of the threads (34), which are located on different, radial transverse axes (36, 38) offset from the center (10), define the other side wall of the longitudinal channels (28) having a course outwardly expanding the width of the longitudinal channel (28).

7. The fastening device according to claim 1, characterized in that for obtaining at least one self-engaging fixing means on the fixing part, at least the flanks of the relevant thread (26) are designed elastically such that the fastening device can be inserted as a whole into the assignable component (42, 44) in a latching manner in the manner of a push-in plug.

8. The fastening device according to claim 1, characterized in that the tool recess (36) enables a rotating and/or pressing engagement with the actuating tool and is preferably designed as a hexagon socket recess.

9. The fastening device according to claim 1, characterized in that the support part (2) is formed as a polygonal, preferably hexagonal or octagonal support plate (12), on one side of which the surface-type fasteners (24) can be fixed, in particular glued, together as a unit.

10. A fastening system consisting of at least one fastening device according to claim 1 and at least one further fastening device, which has surface-type fasteners (24), which form a detachable adhesive closure with the surface-type fasteners (24) of the one fastening device and which can be connected to a further component (44), which is different from the component (42) having the one fastening device.

Description

[0018] In the Figures:

[0019] FIG. 1 shows a perspective oblique view of an exemplary embodiment of the fastening device according to the invention, viewed towards the front provided with a surface-type fastener;

[0020] FIG. 2 shows a perspective oblique view of the exemplary embodiment, viewed towards the rear having a fixing part;

[0021] FIG. 3 shows a plan view of the rear of the embodiment;

[0022] FIG. 4 shows a sectional view of the exemplary embodiment according to the section line IV-IV of FIG. 3, wherein the surface-type fasteners at the front have been omitted;

[0023] FIG. 5 shows a section of a surface of the structure to which the exemplary embodiment of the fastening device according to the invention is mounted;

[0024] FIG. 6 shows a section of a third component to which a further fastening device according to the exemplary embodiment of the invention is attached for its attachment to the surface of the structure of Fig.

[0025] FIG. 7 shows a longitudinal section of the fastening system in which the surface of the structure and the third component are attached to each other by means of the fastening devices according to the invention.

[0026] FIGS. 1 to 4 show the exemplary embodiment of the fastening device according to the invention in relation to a practical embodiment in each case in a view magnified approximately 2.5 times. The exemplary embodiment consists of an integral structure having a support part 2 and a fixing part 4 located at its rear, which is manufactured by injection molding of plastic, in the exemplary embodiment of a glass fiber reinforced polyamide, such as PA6. Further preferred materials are: [0027] high quality glass filled polyamide 66 (PA GF) [0028] polyphtalamide glass filled (PPA GF) [0029] polyetherimide glass filled (PEI GF) [0030] polyphenylene sulfide glass filled (PPS GF) [0031] polyether ether ketone glass filled (PEEK GF)

[0032] The support part 2 has, as shown in FIGS. 1 to 3, an outline in the form of an octahedron with rounded corners 6. On the planar back 8 of the support part 2, the fixing part 4 is formed coaxially with the center 10 (FIG. 3) in the shape of a protruding round pin 5. As shown in FIG. 4, the axial length of the protruding pin 5 is less than of the radially measured width of the support member 2. At the opposite front side, the support member 2 forms a planar support plate 12, which is bordered along its outer periphery by a rim rib 14 protruding from the plane of the support plate 12. The height of the edge rib 14 is about one quarter of the thickness of the support plate 12.

[0033] As shown in FIGS. 1 and 4, a recess 16 extends into the pin 5 of the fixing part 4, starting from the front of the support plate 12. The recess 16 is closed by an end wall 18 just in front of the free end of the pin 5. As a receptacle for the engagement of a rotary tool, the recess 16 has the shape of a hexagon socket, for the size of a practical embodiment mentioned for a width across flat of 6 mm. As shown in FIGS. 1 and 4, the entrance of the recess 16 is surrounded by an enclosure in the form of an annular rib 20 having a circular outer periphery, wherein the height of the annular rib 20 protruding from the plane of the support plate 12 corresponds to the height of the peripheral rim rib 14. The annular surface 22 (FIG. 4) located between outer rim rib 14 and inner annular rib 20 forms the contact surface for the abutment of a blank which appropriately fills the annular surface 22 having protruding surface-type fasteners 24 (only partially numbered in FIG. 1). In the present example, the surface-type fasteners 24 for forming self-engaging mushroom fasteners are formed by mushroom heads on stems protruding from a support. For this purpose, a blank of the known Duotec@ material can be provided, which is attached to the annular surface 22 of the support plate 12 as a blank self-adhesive. It goes without saying that other types of fastener elements can be provided, for example having hooking elements in the form of hoops, loops and hooks. Instead of an adhesive connection to the support plate 12 a welded connection may also be provided.

[0034] In the present exemplary embodiment, the pin 5 forming the fixing part is designed as a self-tapping screw, whose threads 26, of which three threads 26 are visible in FIGS. 2 and 4, form the fixing means. On two opposite sides, the threads 26 are interrupted such that in each case an axially extending longitudinal channel 28 is formed, cf. in particular FIGS. 2 and 3. As the latter figure shows, one end 30 of the threads 26 defines a side wall of the relevant longitudinal channel 28 located on a common radial center transverse axis 32 of the support part 4, wherein the relevant other ends 34 of the threads 26, which are located on different radial transverse axes 36 and 38, offset from the center, define the other side wall of the longitudinal channel 28, which has a course outwardly expanding the width of the longitudinal channel 28. In the manner known from self-tapping plastic screws, this geometry permits relaxation in the radial direction of tension to the center around the screw profile, which prevents the screw from loosening under dynamic loads.

[0035] Instead of the threads 26 having a thread pitch, which, by turning the support part 2 forms a self-tapping screw connection in a pre-drilled receptacle 40, cf. FIGS. 5 to 7, the fixing means may be formed on the outside of the pin 5 of the fixing part 4 in a self-engaging manner. For this purpose, threads 26 may be formed with or without thread pitch on their flanks in an elastically yielding manner, such that the anchoring to the component or supporting surface can be performed by pressing without rotational movement in the receptacle 40.

[0036] FIGS. 5 to 7 show, in a highly schematically simplified form, the example of a fastening system formed by the fastening devices according to the invention. In FIGS. 5 and 7, a component formed by a component formed by the building structure is denoted by 42, in which receptacles 40 predrilled for respective fastening devices according to the invention are formed in the form of a blind hole, only one of which is shown. A third component to be attached to the component 42, for example in the form of a panel, is denoted by 44 in FIGS. 6 and 7. It has pre-drilled receptacles 40 in the form of through holes for any fastening devices according to the invention, of which also only one is shown. While FIGS. 5 and 6 show the component 42 and the third component 44 in the unmounted position, FIG. 7 illustrates the fixed state with self-tapping threaded engagement of the pin 5 of the respective fastening device with the associated receptacle 40 in the component 42 and in the third component 44.

[0037] The claimed fastening device can also be produced integrally, i.e. together with the surface-type fasteners, by means of a conventional 3D printing process. In this way, the manufacturing method for the fastening device according to the invention can be further automated.