Fasteners for attaching a functional element to a component

Abstract

A dowel-like fastening element (100) for fastening a functional element (4), in particular a fitting, to a component, in particular a furniture part (1), wherein the dowel-like fastening element (100) has a flange-like collar section (103) for bearing on the functional element (4) and an expanding section (102) which can be expanded by an expanding element, wherein the expanding section (102) is designed to pass through an elongated hole (5) of the functional element (4) and to engage and to provide a force-fit, preferably tool-free, fastening in an elongated hole (2) of the component, in particular the furniture part.

Description

[0001] The invention relates to a dowel-like fastening means for fastening a functional element to a component, in particular to a furniture part, according to the preamble of claim 1.

[0002] For tool-free mounting of fittings, guide rails or other components on furniture, dowel-like fasteners are known which are designed as expansion dowels.

[0003] Such a dowel-like fastener for furniture is shown in EP 0 878 630 B1. An expanding part of the dowel-like fastener is actuated by a pivoting eccentric lever. A disadvantage is that a separate installation space must be provided on the furniture for the eccentric lever, into which the lever pivots when it has expanded the dowel-like fastener.

[0004] EP 3 401 556 B1 discloses a dowel-like fastening device for furniture in which two cylindrical dowel sections are connected by a bridge. Here, too, the dowel sections are expanded by a pin-like expanding element. The respective expanding element is actuated by an expanding lever that snaps onto both expanding elements and actuates them synchronously. A disadvantage of this design is that the expanding lever must remain permanently attached to the expanding elements after the expansion process and therefore protrudes vertically from the furniture wall, which is problematic for a number of applications.

[0005] Based on the prior art, the invention thus has the task of creating a dowel-like fastening device for the tool-free mounting of fittings, guide rails or other components in furniture, which is simply designed and particularly easy and yet safe to mount.

[0006] This problem is solved by the subject matter of claim 1. According to this claim, a dowel-like fastening means for fastening a functional element, in particular a fitting, to a component, in particular a furniture part, is provided, wherein the dowel-like fastening means has a flange-like collar section (for bearing on the functional element) and an expanding section which can be expanded by an expanding element, wherein the expanding section is designed to pass through an elongated hole of the functional element and to engage and provide a force-fit fastening in an elongated hole of the component, in particular the furniture part.

[0007] This invention provides a simple and exceptionally easy-to-install, secure fastening device for the tool-free mounting of fittings, guide rails, or other components to building elements, particularly furniture parts. This allows for a simple and secure attachment of the functional element to the furniture part, preventing rotation. The fastening devices according to the invention, which can also be referred to as "slotted expansion anchors," are either supplied loose with the functional element, particularly the fitting, pre-assembled on the item, or form a pre-assembled unit with the functional element, particularly the fitting. The functional element can be designed, for example, as a cabinet rail support, a hinge mounting plate, a back panel bracket, or a drawer slide (this list is not exhaustive).

[0008] In a preferred embodiment, the spreading section may be completely or partially penetrated by one or more slots extending from the free end towards the collar section, or it may be subdivided into several spreading webs. This is because such spreading webs can be individually and particularly securely fixed to the inner circumference of the elongated hole in the component.

[0009] It can optionally be particularly advantageous to provide that the spreading element is designed as a spreading lever which can be pivoted into a non-use position in which the spreading bars are relaxed and which can be pivoted into a use position in which it presses the spreading bars against the inner circumference of the elongated hole of the component, in particular of the furniture.

[0010] It is particularly advantageous and simple if the spreading element is designed as a spreading lever, preferably as a manually operable spreading lever that can be operated without tools. The functional element, in particular the fitting, can thus be easily attached to and detached from the component.

[0011] The invention also provides an assembly with a furniture part to which a functional element, in particular a fitting, is attached with a dowel-like fastening means according to one of the related claims, wherein the functional element has an elongated hole and wherein the functional element has an elongated hole corresponding to the elongated hole of the furniture part, which is aligned with the elongated hole of the furniture part, and wherein the expanding element of the fastening means penetrates the elongated hole of the functional element and projects into the elongated hole of the furniture part, where it is expanded, so that it secures the functional element to the furniture part.

[0012] According to one variant, the elongated hole of the furniture part and / or the elongated hole of the functional element can be designed as an elongated recess or bore in cross-section with two parallel sides, which are connected to each other by semi-cylindrical ends.

[0013] However, the elongated hole of the furniture part and / or the elongated hole of the functional element can also be formed from at least two adjacent bores - also called a "double hole" - which overlap in the area of ​​circular sectors or cylindrical sectors.

[0014] In a preferred embodiment, the fitting may be designed as a drawer guide and the component may be a furniture part, and this in turn may be a furniture wall of a piece of furniture.

[0015] The geometric elongated hole or double hole variant creates space in particular for a pivoting expansion lever, which pushes the expansion plug apart in the installed state and can thus create and ensure a positive connection between, for example, fitting and fastening material.

[0016] According to a particularly preferred embodiment of the invention, the spreading section is fully or partially penetrated by one or more slots extending from the free end towards the collar section and is divided into several spreading webs, preferably two longer spreading webs and two shorter spreading webs opposite each other, with an opening formed between them as a space for the engagement of the spreading element.

[0017] It can then be advantageously and simply designed that the spreading element is designed as a spreading lever which can be pivoted into a non-use position in which the spreading bars are relaxed and which can be pivoted into a use position in the opening in which it presses all the spreading bars against the inner circumference of the elongated hole of the component, in particular the furniture.

[0018] It can then be advantageous and space-saving to provide that the spreading lever is pivotably mounted in an opening in the fastening device.

[0019] Preferably, the spreading lever comprises a pressure section and an actuating section. The actuating section can be designed such that pressure is exerted upon it, enabling the pressure section to spread the spreading webs apart. The pressure section has a corresponding geometric design that forces the spreading webs apart when pivoted into the opening.

[0020] In a further preferred embodiment, it is optionally provided that the actuating section is designed such that, in the operating position, it does not project beyond the other elements of the fastening device in the Z-direction. This results in an attractive appearance and a favorable feel, which are not impaired by protruding areas of the actuating section.

[0021] In a further preferred embodiment, it may optionally be provided that one, several or all of the spreading webs have one or more ribs on their outer sides, which are directed towards the inner circumference of the elongated hole, in order to optimize the force-fit attachment of the fastening means to the elongated hole.

[0022] Furthermore, in a further preferred embodiment, it can optionally be provided that the dowel-like fastener has one or more locking elements, in particular one or more locking hook sections, for locking the fastener firmly onto the functional element for pre-assembly. In this way, the fastener can be easily pre-assembled onto the functional element before this pre-assembled unit is then attached to the component.

[0023] The dowel-like fastener or its components can preferably be made of a plastic material. However, it can also have one or more metallic components that are completely or partially overmolded with a plastic material. It is also preferably designed as a single piece or in two parts, and thus easy to manufacture.

[0024] Further advantageous embodiments of the invention can be found in the remaining dependent claims.

[0025] The invention is described in more detail below with reference to several exemplary embodiments and the drawings. The invention is not limited to these exemplary embodiments, but can also be implemented in other ways, either literally or equivalently. In particular, individual features of the exemplary embodiments described below can also be used in other exemplary embodiments not shown below.

[0026] It shows: Fig. 1: in a) a spatial representation of a section of a piece of furniture with a slotted hole and in b) a spatial representation of a section of a piece of furniture with a so-called double hole, a variant of the slotted hole; Fig. 2: an exploded view of an assembly consisting of a furniture part, a functional element and a fastener; Fig. 3: in a) a spatial representation of the part of the furniture made of Fig. 1a arranged functional element and in b) to d) a pre-assembled unit and a fastening device and a functional element before, during and after assembly on a piece of furniture; Fig. 4: a spatial view of the pre-assembled unit made of Fig. 3b); Fig. 5: in a) a spatial view of the assembled component Fig. 3c, in b) a top view of the assembly from a) and in c) a sectional view of the assembly from a), with a non-actuated spreading lever; Fig. 6: in a) a spatial view of the assembled component Fig. 3d, in b) a top view of the assembly from a) and in c) a sectional view of the assembly from a), with an actuated spreading lever; Fig. 7: in a) a side view of the pre-assembled unit made of Fig. 3c) with the spreading lever not actuated and in b) a side view of the pre-assembled unit made of Fig. 3d) with the spreading lever activated; Fig. 8: in a) to d) different views of another pre-assembled unit with the spreading lever not actuated and with it actuated; Fig. 9: in a) a top view of an assembly comprising the furniture part, the functional element and the fastening means and in b) a side view of the arrangement from a) in section, with a spreading lever not actuated; Fig. 10: in a) a top view of an assembly with the furniture part, the functional element and the fastening device and in b) a side view of the arrangement from a) in section, with an actuated spreading lever; Fig. 11: in a) and b) different spatial views of a pre-assembled unit consisting of a drawer slide as a functional element with two fasteners pre-mounted on it.

[0027] Several exemplary embodiments are described in the following figure description. Individual features of these exemplary embodiments can also be combined with exemplary embodiments not shown and are each also suitable as advantageous embodiments of the objects described in one or more of the main and dependent claims.

[0028] The terms used below, such as "above", "below", "right", "left", "inside" or "outside", refer to the representation of the figures and may be transformed in space using the represented coordinate system.

[0029] In Fig. 1a and in Fig. Figure 1b shows a furniture part 1 of a piece of furniture – of which only a section or part is shown here – which is provided with an elongated hole 2. The furniture part 1 can be part of a furniture carcass, for example, a side panel or a center panel of the furniture. The furniture part 1 can be, in particular, panel-like. With respect to a Cartesian coordinate system, it extends in the X / Y plane, or its main outer surfaces extend in or parallel to the X / Y plane. Between the main outer surfaces, the furniture part extends in the Z direction perpendicular to them (i.e., it has a depth Z1).

[0030] Each elongated hole 2 in the sense of this document extends in the furniture part as a recess of the furniture part in the Z direction and has a slot-like shape perpendicular to it, i.e. it is (here perpendicular to the Z direction in the Y direction) longer than it is wide (here perpendicular to the Z direction in the X direction).

[0031] A slot 2, as defined in this document, can therefore be, for example, an elongated bore with two parallel sides connected by semi-cylindrical ends. In the case of a slot 2 in the form of an elongated bore or groove – as described in Fig. As shown in Figure 1a, the narrow sides of the elongated hole 2 are closed off by semicircles whose diameters correspond to the width of the elongated hole 2. The elongated hole 2 thus has elongated walls 3a, 3b that run parallel to each other, as well as two semi-cylindrical walls 3c, 3d that are opposite each other. Such a configuration is shown in Figure 1a. Fig. 1a.

[0032] The elongated hole 2 as defined in this document can, for example, also be formed from at least two adjacent bores – also called a “double hole” – that overlap in the area of ​​circular or cylindrical sectors. Such an elongated hole 2 as a double hole is described in Fig. Figure 1b illustrates this. With such an elongated hole 2, two partially cylindrical wall surfaces 3e, 3f result, each with a sector-shaped circular outline. Such a configuration is shown in the Fig. 1b.

[0033] The respective elongated hole 2 can be designed as a blind hole with a bottom, perpendicular to the main surface of the furniture part in the Z direction. Alternatively, it can be designed as a through hole that completely passes through the furniture part in the Z direction.

[0034] In Fig. Figure 2 shows an exploded view of a fastening assembly.

[0035] This comprises the panel-like furniture part 1 of the furniture, a similarly panel-like functional element 4 to be attached to it – of which only a section is shown here – and a dowel-like fastener 100 – which can also be referred to as a connecting dowel. The fastener 100 serves to attach the functional element 4 to the panel-like furniture part 1. The dowel-like fastener 100 is designed to connect the functional element 4 to the furniture part 1 of the furniture and will be described in more detail below.

[0036] The functional element 4 and the fastening element 100 can also be designed as a single-piece or one-part component or as a type of pre-assembled unit. These versions are not shown.

[0037] The furniture part 1 has the elongated hole 2 and the functional element 4 has an elongated hole 5 corresponding to the elongated hole 2 of the furniture part, which is aligned with the elongated hole 2 of the furniture part 1, wherein a spreading element passes through the elongated hole 5 of the functional element 4 and is inserted into the elongated hole 2 of the furniture part 1, where it is then spread open, so that it secures the functional element 4 to the furniture part 1 in a simple and rotationally secure manner.

[0038] The term "dowel-like" indicates that the fastener 100 functions like a dowel. By expanding the fastener 100 inserted into the elongated hole 2, a force-fit connection can be created between the dowel and the surrounding material of the elongated hole 2, and optionally, a form-fit connection can be additionally created to secure the fastener 100 against being pulled out of the corresponding hole, in this case, the elongated hole 2.

[0039] In a preferred embodiment, the fastener 100 can therefore have at least one expanding element – ​​here in the form of the expanding lever 101. The expanding element ensures that the fastener 100 expands after being inserted into the elongated holes 2, 5, thereby generating the necessary frictional connection between the fastener 100 and primarily the walls 3a, 3b, 3c, 3d and 3e, f of the elongated hole 2 in the furniture part 1 of the furniture, in order to secure the fastener 100 against being pulled out of the furniture part 1. The fastener 100 can be designed in two parts and, for example, be assembled in the injection mold or overmolded.

[0040] This will be examined in more detail below. Apart from the optional bottom section when configured as a blind hole, the elongated hole 2 essentially has four walls 3a, 3b, 3c, 3d on its inner circumference (see e.g. Fig. 5c, Fig. 6c).

[0041] The material from which the furniture part is made can be a wood-based material or a wood-containing material, but also another material from which a furniture part can be manufactured.

[0042] The dowel-like fastener 100 and its components can preferably be made of a plastic material. However, it can also have one or more metallic components that are completely or partially overmolded with a plastic material.

[0043] Overall, the fastening element 100 is thus excellently secured against being pulled out of the elongated hole 2, which ensures that the functional element 4, of which only a section is shown here, is permanently and securely held on the furniture part 1 of the furniture.

[0044] The functional element 4 can, for example, be a fitting, a drawer slide, or another functional element for a piece of furniture. The cutout of the functional element 4 also has an elongated hole 5, which preferably has the same dimensions as the elongated hole 2 from [reference missing]. Fig. 1a in furniture part 1 of the furniture.

[0045] The dowel-like fastener 100 is described below with reference to Fig. 2 and Fig. 4 and the parts of the Fig. 3, Fig. 5 and Fig. 6 described in more detail.

[0046] The dowel-like fastener 100 can have an expansion section 102, a collar section 103, and a through-hole 104 penetrating the expansion section. The terms recess and through-hole are used synonymously below. The dowel-like fastener 100 can have an expansion lever 101 as an expansion element for expanding the expansion section 102.

[0047] The flange-like collar section 103 can extend in the XY plane with relatively thin walls. It is designed to rest on the functional element 4. It can be designed to be circumferentially closed. It extends radially outwards from the spreading section.

[0048] The spreading section 102 extends essentially perpendicular to the collar section 103 and is designed to be firmly pressed against the inner circumference of the elongated hole 2 in the spread state - essentially radially to the direction Z.

[0049] The opening 104 in the spreading section 102 is also designed to accommodate the spreading element – ​​here designed as a wedge-shaped spreading lever 101. This means that the spreading element advantageously requires no additional installation space, but is essentially accommodated directly by the fastening element 100 itself.

[0050] A wall 105, which the opening 104 radially forms on the spreading section 102, can be designed as a type of bearing shell 106. A geometrically corresponding axial projection 107 can be inserted into this bearing shell 106, so that the spreading lever 101 is pivotably mounted on the fastening element 100. Alternatively, the spreading lever 101 and the spreading section 102 can be pivotally connected by a film hinge.

[0051] The spreading lever 101 can have a pressure section 108 designed to spread the spreading section 102 of the fastening element 100 when the spreading lever 101 pivots into the opening 104, thereby exerting a normal force on the walls 3a, b, c, d and 3e, f of the elongated hole 2 via the spreading section 102. The pressure section 108 can be designed to push the spreading section 102 substantially radially outwards in all directions. The spreading lever 101 can further have an actuating section 109, which may be provided with knurling for optimized handling, as shown in Fig. 2 is shown.

[0052] The actuating section 109 of the spreading lever 101 can engage in a recess 110 provided for this purpose in the collar section 103 when the fastening element 100 is spread, so that the actuating section 109 preferably does not protrude from the collar section 103 (see, for example, [reference]). Fig. 3d).

[0053] In Fig. Figure 3a shows the furniture part 1 of the furniture as well as, by way of example, a section of the functional element 4 to be attached with the elongated hole 5. This can be designed as a fitting.

[0054] The two elongated holes 2, 5 lie congruently on top of each other and thus have approximately the same dimensions in their top view.

[0055] In Fig. Figure 3b shows that the dowel-like fastener 100 with the expanding lever 101 is inserted into the elongated hole 5 of the cutout of the functional element 4 to be fastened. The collar section 103 of the fastener 100 rests on the section of the functional element 4. The expanding lever 101 is inserted with its axial extension 107 into the bearing shell 106 of the fastener 100 and is in a starting position, so that the dowel-like fastener 100 is not expanded.

[0056] In Fig. Figure 3c shows that the dowel-like fastener 100 is pre-assembled in the functional element 4 with its expansion section 102 inserted into the elongated hole 2 of the furniture part 1 of the furniture. The expansion lever 101 remains in a starting position, so that the dowel-like fastener 100 is not expanded.

[0057] In Fig. Figure 3d shows that the spreading lever 101 is moved into the spreading position and thus opens the spreading section 102 (not shown here, see e.g. Fig. 6c or Fig. 10b) of the fastening device 100 spreads open, so that the functional element 4 is attached to the furniture part 1. In this respect, the actuating section of the spreading lever 101 engages in the recess 110 provided for this purpose in the collar section 103 of the fastening device 100, so that the actuating section 109 of the spreading lever 101 does not protrude from the collar section 103 of the fastening device 100.

[0058] In Fig. Figure 4 shows the dowel-like fastening element 100 with spread expansion section 102 with the cutout of the functional element 4 without the furniture part 1 of the furniture.

[0059] The spreading section 102 is preferably wholly or partially penetrated by one or more slots 115 extending from the free end towards the collar section 103, or subdivided into several spreading webs 121, 122, 123, 124. At least two or more longer spreading webs 121 and 123 and two shorter spreading webs 122, 124, each opposite the other, are provided. The longer spreading webs 121, 123 are designed to be placed against the longer sides of the elongated hole, and the shorter spreading webs 122, 124 are designed to be placed against the shorter end regions of the inner circumference of the elongated hole 2. The longer spreading webs 121, 123 may have arcuate ends. The shorter spreading webs 122, 124 may be arcuate overall. The spreading element, here a spreading lever 101, is designed so that it can press all of the spreading webs 121 to 124 outwards against the inner circumference of the elongated hole 2 of the furniture part 1.For this purpose, a space for the engagement of the spreading element is formed between the spreading bars 121, 122, 123, 124.

[0060] The spreading ribs 121-124 can, for example, have several ribs that project radially outwards towards the inner circumference of the elongated hole 2. The one or more ribs preferably taper radially outwards. In the spread-open state, the one or more ribs ensure, in particular, a good frictional connection of the fastener in the elongated hole 2.

[0061] For example, a first lower rib 111, arranged radially to an insertion direction Z of the fastener 100, can be provided on the spreader bars 121-124. The first lower rib 111 can be positioned radially at a free end on the spreader bars 121-124 and can have a wedge-shaped cross-section. An inclined plane 112 of the wedge is designed here as a kind of insertion chamfer. The first rib 111, shaped in this way, thus supports both the insertion of the spreader section 102 into the elongated hole 5 of the cutout of the functional element 4 to be fastened and into the elongated hole 2 in the furniture part 1 of the furniture.Likewise, the first rib 111 designed in this way can be elastically deformable under load, so that the first rib 111 deforms under a normal force acting on it and conforms to the wall 3a, b, c, d of the elongated hole 2 in the furniture and generates a corresponding normal force that leads to a force-fit connection of the spreading section 102 - and thus of the fastening means 100 - with the elongated hole 2 in the furniture part 1 of the furniture.

[0062] Furthermore, a second central rib 113, arranged radially to an insertion direction Z of the fastening element 100, can be provided on the spreading webs 121-124. The second central rib 113 is spaced axially – opposite to the insertion direction Z of the fastening element 100 – from the first lower rib 111 and can have a different or, as shown, the same cross-sectional geometry as the first lower rib 111.

[0063] Furthermore, the spreading section 102 of the fastener 100 can optionally have one or more locking elements, in particular one or more locking hook sections, for locking the fastener onto the functional element 4 for pre-assembly. In this way, the fastener 100 can be easily pre-assembled onto the functional element 4 before this pre-assembled unit is then attached to the component. For this purpose, one or more of the spreading webs 121-124 can optionally have an upper, here a third, locking hook arrangement arranged radially to an insertion direction Z of the fastener 100, which here can be designed as a third rib 114.

[0064] The third rib 114 is spaced axially – in the insertion direction Z of the fastening element 100 – from an underside of the collar section 103. The third upper rib 114 can be designed as a kind of ring-shaped locking hook onto which the functional element 4, to be fastened with the fastening element 100, can be snapped with its elongated hole 5.

[0065] This means that the fastener 100 is pre-assembled in a defined manner for further assembly, usually in such a way that the fastener 100 remains securely attached to the functional element 4 during the further alignment and assembly process.

[0066] One or more of the ribs, here the first lower rib 111 and the second, middle rib 113 as well as the wall 105 of the spreading section 102, are also completely or partially penetrated by several slots 115 arranged axially, i.e. parallel to the insertion direction Z of the fastening means 100.

[0067] The slots 115 allow the expansion section 102 of the dowel-like fastener 100 to be spread open when the expansion section 102 is spread open by the expansion lever 101.

[0068] Fig. 5a, Fig. 5b, Fig. 7a, Fig. 9a and Fig. 9b each show analogous to Fig. 3c, how the dowel-like fastener 100 with its expanding section 102 is inserted into the elongated hole 2 of the furniture part 1 of the furniture in order to fix the functional element 4 with the elongated hole 5 to the furniture part 1. The expanding lever 101 is in its starting position, so that the dowel-like fastener 100 is not expanded.

[0069] In Fig. Figure 5c shows the furniture part 1, the cutout of the functional element 4 and the dowel-like fastening element 100, which is inserted into the elongated hole 2 of the furniture part 1 and passes through the elongated hole 5 of the functional element 4.

[0070] The elongated hole 2 of the furniture part 1 does not completely penetrate the furniture part 1; it is designed as a pocket or blind hole with an elongated geometry in the top view. A pocket, as defined in this document, is a recess or cavity in a furniture part, preferably produced by drilling or milling. This design makes it possible to use the fastener 100 even in a thicker wall or, for example, a central partition of a piece of furniture, since the elongated hole 2 does not necessarily have to completely penetrate the central partition, as is the case in [reference to previous document]. Fig. 5c is shown and thus a visually appealing optical impression is achieved on the side of the central wall facing away from the fastening element 100 - without visible drilling or visible elongated hole and without elaborate measures to cover it.

[0071] The spreading element – ​​i.e., the spreading lever 101 – is located in the Fig. 5c in the starting position.

[0072] The wall 105 can further form a swivel angle limiter 117. The swivel angle limiter 117 can be integrally formed on the wall 105 in the area of ​​the bearing shell 106 and ensures that the swivel angle of the spreading lever 101 is limited in the direction of the starting position of the spreading lever 101. Furthermore, the swivel angle limiter 117 prevents the spreading lever 101 from falling out of the opening 104.

[0073] The third rib 114, on which the functional element 4 - of which only the cutout is indicated here - is held as a kind of ring snap hook end before the insertion of the fastening element 100 into the elongated hole 2 designed here as an elongated pocket, is already elastically deformed here and thus already contributes to holding the fastening element 100 securely in the elongated hole 2 - or as here - in the pocket-like elongated hole 2.

[0074] The first, lower rib 111 and the second, middle rib 113 each lie radially against the wall 3a, b, c, d and 3e, f respectively, but are not yet elastically deformed at this point.

[0075] Fig. 6a, Fig. 6b, Fig. 7b, Fig. 10 and Fig. Figures 10b show that the spreading lever 101 is in its spreading position, so that the dowel-like fastening element 100 is spread.

[0076] In Fig. Figure 6c shows the furniture part 1 of the furniture, the cutout of the functional element 4 and the dowel-like fastening element 100 in section, as it is inserted into the elongated hole 2 of the component 1 and passes through the elongated hole 5 in the functional element 4.

[0077] The spreading lever 101 can engage with its axial extension 107 in the bearing shell 106 of the wall 105 of the spreading section 102. Furthermore, the entire actuating section 109 of the spreading lever 101 engages in the opening 104 of the spreading section 102, so that the spreading section 102 is spread open in the radial direction.

[0078] The first, lower rib 111 and the second, middle rib 113 each lie radially against the wall 3a, b, c, d and 3e, f respectively, and can be elastically deformed, which is not shown in detail here.

[0079] In Fig. Figure 8a shows the dowel-like fastener 100 with the cutout of the functional element 4 in a pre-assembled position, still without the furniture part 1. The free end of the expanding section 102 and the opening 104 with the wall 105 of the fastener 100 are particularly visible here. The expanding lever 101 is also shown; it is in its starting position. Fig. It can be seen from Figure 8a that the slots 115 can each be formed in a semi-cylindrical section 116a, b of the spreading section 102. This is advantageous because the actuating section 109 of the spreading lever 101 also acts on one of the semi-cylindrical sections 116a, b of the spreading section 102, and thus, through the interaction of the spreading lever 101 and the slots 115 in the area of ​​the semi-cylindrical sections 116a, b, a particularly large deformation of the spreading section 102 can be achieved, thereby generating a high normal force that acts on the wall 3c, d (not shown here, see e.g. Figure 8a). Fig. 1a) of the elongated hole 2 acts (also not shown here, see e.g. Fig. 1a).

[0080] In Fig. Figure 8b also shows the dowel-like fastener 100 with the cutout of the functional element 4 as a pre-assembled unit. Here, as in Fig. Figure 8a shows the free end of the spreading section 102 and the opening 104 with the wall 105 of the fastening element 100. The spreading lever 101 is also shown here; it is in the spreading position. Therefore, the spreading section 102 is spread open.

[0081] In Fig. 8c is an embodiment of the dowel-like fastening element 100 for an elongated hole 2 according to the principle of a double hole (see Fig. 1b) shown. Analogous to the representation in Fig. 8a the spreading lever 101 is located here in its starting position.

[0082] In Fig. 8d is also an embodiment of the dowel-like fastening element 100 for an elongated hole 2 according to the principle of a double hole (see Fig. 1b) shown. Analogous to the representation in Fig. 8b the spreading lever 101 is located here in its spreading position.

[0083] In Fig. Figure 10b shows that the expanding lever 101 can fully penetrate the opening 104 of the expanding section 102 when it is in the expanding position. The free end of the pressure section 108 of the expanding lever 101 ends in the axial direction, or in the insertion direction Z, shortly before the free end of the expanding section 102 of the dowel-like fastener 100. Therefore, in the expanding position of the expanding lever 101, the pressure section 108 of the expanding lever 101 is completely enclosed by the opening 104 of the expanding section 102. In this way, the wall 105 of the expanding section 102 of the expanding lever is optimally expanded.

[0084] The lever can be released manually or with the help of a tool, such as a screwdriver.

[0085] In Fig. Figure 11a shows a spatial view from an "interior perspective" of a drawer slide, where the drawer slide or a wall of this drawer slide forms the functional element 4, which is to be attached to a furniture part (not shown here). Here, the drawer slide has, by way of example, two elongated holes spaced apart in the extension direction, in which two fasteners 100 are pre-mounted. The spreading lever 101 of each fastener 100 is shown here in the spreading position to illustrate how the drawer slide can be mounted to a furniture part. Fig. In addition, 11b is a spatial view from an “external perspective” of the extract guide from Fig. 11a shown. Reference symbol list 1 piece of furniture (furniture) 2 elongated holes 3a, b, c, d wall 4 Functional element 5 elongated holes 100 fasteners 101 Spreader levers 102 Spreader section 103 Collar section 104 Breakthrough 105 wall 106 Bearing shell 107 Axle attachment 108 Print section 109 Actuation section 110 Exclusion 111 first rib 112 inclined plane 113 second rib 114 third rib 115 slots 116a, b semi-cylindrical section 117 Swivel angle limiter 121 - 124 Spreader bars QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 0 878 630 B1

[0003] EP 3 401 556 B1

[0004]

Claims

[1] Dowel-like fastening means (100) for fastening a functional element (4), in particular a fitting, to a component, in particular a furniture part (1), wherein the dowel-like fastening means (100) has a flange-like collar section (103) for bearing on the functional element (4) and an expanding section (102) which can be expanded by an expanding element, characterized by , that the spreading section (102) is designed to pass through an elongated hole (5) of the functional element (4) and to engage and to provide a force-fit, preferably tool-free, fastening in an elongated hole (2) of the component, in particular the furniture part. [2] Dowel-like fastening element (100) according to claim 1, characterized by, that the spreading section (102) is wholly or partially penetrated by one or more slots (115) extending from the free end towards the collar section (103) and is subdivided into several spreading webs (121, 122, 123, 124), wherein an opening (104) is formed between these spreading webs (121, 122, 123, 124) as a space for the engagement of the spreading element. [3] Dowel-like fastening element (100) according to claim 2, characterized by , that two longer spreader bars (121 and 123) are provided and two shorter spreader bars (122, 124) are located opposite each other. [4] Dowel-like fastening element (100) according to claim 2 or 3, characterized by, that the spreading element is designed as a spreading lever (101) which can be pivoted into a non-use position in which the spreading webs (121 - 124) are relaxed and that it can be pivoted into a use position in the opening (104) in which it pushes all the spreading webs outwards. [5] Dowel-like fastening element (100) according to claim 4, characterized by , that the spreading lever (101) is pivotably mounted in the opening (104) of the fastening device. [6] Dowel-like fastening element (100) according to claim 4 or 5, characterized by , that the spreading lever (101) has a pressure section (108) and an actuating section (109). [7] Dowel-like fastening element (100) according to one or more of the preceding claims, characterized by , that the actuating section is designed such that in the operating position it does not project beyond other elements of the fastening device (100) in the Z direction. [8] Dowel-like fastening element (100) according to one or more of the preceding claims, characterized by that it has one or more locking means, in particular one or more locking hook sections (114) for locking the fastening means (100) onto the functional element (4) for pre-assembly of the fastening means (100) onto the functional element (4). [9] Dowel-like fastening element (100) according to one or more of the preceding claims, characterized by that it has one or more components made of a plastic material or that it has one or more metallic components that are wholly or partially overmolded with a plastic material. [10] Dowel-like fastening element (100) according to one or more of the preceding claims, characterized by that it is formed in one piece or in two pieces. [11] Assembly comprising a component, in particular a furniture part (1), to which a functional element (4), in particular a fitting, is attached with a dowel-like fastening means (100) according to one of the preceding claims, characterized by , that the furniture part (1) has an elongated hole (2) and that the functional element (4) has an elongated hole (5) corresponding to the elongated hole (2) of the furniture part (1), which is aligned with the elongated hole (2) of the furniture part (1) and that the spreading element penetrates the elongated hole (5) of the functional element (4) and projects into the elongated hole (2) of the furniture part (1), where it is spread open, so that it secures the functional element (4) to the furniture part (2). [12] Assembly according to the preceding claim, characterized by that the fastening means (100) can be pre-assembled on the functional element (4) by means of one or more locking means, in particular one or more locking hook sections. [13] Assembly according to the preceding claim, characterized by , that the fitting is a drawer guide and that the furniture part (1) is a furniture wall of a piece of furniture. [14] Assembly according to the preceding claim, characterized by , that the elongated hole (2) of the component, in particular of the furniture part and / or the elongated hole (5) of the functional element (4) is designed as an elongated recess or bore in cross-section with two parallel sides which are connected to each other by semi-cylindrical ends. [15] Assembly according to claim 13 or 14, characterized by , that the elongated hole (2) of the component, in particular of the furniture part and / or the elongated hole (5) of the functional element (4) is formed from at least two adjacent bores - also called "double hole" - which overlap in the area of ​​circular sectors or cylindrical sectors.

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