WO2008017384A1

WO2008017384A1 - Fastening system for slab-like panels

Info

Publication number: WO2008017384A1
Application number: PCT/EP2007/006628
Authority: WO
Inventors: Ralf Eisermann
Original assignee: Agepan Tarkett Laminate Park Gmbh & Co. Kg
Priority date: 2006-08-09
Filing date: 2007-07-26
Publication date: 2008-02-14
Also published as: ATE524625T1; RU2461690C9; EP2054566B1; RU2461690C2; DE102006051840A1; US20090199502A1; EP2054566A1; RU2009107872A

Abstract

The invention relates to a fastening system for rectangular slab-like panels (1, 2) having two long edges (5, 5') and two short edges (6, 6') and comprising retaining profiles arranged on the edges, of which oppositely arranged retaining profiles match one another in such a way that identical panels (1, 2) can be connected to one another, wherein the retaining profiles in a connected state produce a form fit in a direction (D1) which extends perpendicularly to a laying plane (E) in which the panels (1, 2) are to be laid, and/or produce a form fit in a direction (D2) which lies in the laying plane (E) and extends perpendicularly to the connected edges (5, 5', 6, 6'), wherein the retaining profiles are provided on the long edges (5, 5') and/or on the short edges (6, 6') with at least one surface which interacts with a complementary surface when the retaining profiles are connected to one another, and wherein at least the surface or the complementary surface comprises a friction-increasing layer (16) with an elevated coefficient of friction (RH), thereby strengthening the connection of the retaining profiles, wherein in a direction of insertion (DE), in which the surfaces are moved relative to one another when connecting the retaining profiles, the friction-increasing layer (16) has a coefficient of friction (RN) which is less than the coefficient of friction (RH).

Description

Attachment system for tabular panels

Description:

The invention relates to a fastening system for square tabular, two long edges and two short edges having panels, the fastening system having retaining profiles, which are arranged at the edges and of which oppositely arranged holding profiles match each other so that similar panels can be interconnected ,

For example, from WO 94/26999 a fastening system for Fußbo- panels is known in which the holding profiles in a connected state form a positive connection in one direction, which extends perpendicular to a laying plane in which the panels are to be laid, and a positive connection form in a direction that lies in the laying plane and extends perpendicular to the connected edges. The holding profiles of WO 94/26999 comprise a groove and a spring which is pushed into the groove when the holding profiles are connected to each other. When connecting the spring and groove comes a surface of the spring with a mating surface on the groove to the plant, so that the spring can be supported on the groove.

From US Pat. No. 6,808,777, a fastening system for panels is also known, wherein the retaining profiles have a projection with an upper side inclined to the laying plane and a recess with a lower side likewise inclined to the laying plane. In the connected state of the retaining profiles, the underside of the recess is located on the top of the projection, wherein the inclination forms a positive connection of the holding profiles in one direction from the bottom and top, which lies in the laying plane and extends transversely to the holding profiles.

The top of the projection and the bottom of the recess are each provided with a friction-increasing layer, so that a relative displacement of projection and recess is difficult. The friction-increasing layers with an increased coefficient of friction RH can thus strengthen the connection of the holding profiles. Due to the inclination of the top of the pre-jump and underside of the recess relative to the laying plane, the panels to be joined can not be pushed together in a planar manner to connect the respective holding profiles. Rather, it is necessary to angle one of the panels in order to join the retaining profiles together. For panels having corresponding retention profiles on both the long edges and the short edges, laying can lead to difficulties because the panel pivots both around its long edges and around its short edges to join a panel to other panels already laid must become.

The invention is therefore based on the object to provide a fastening system for panels that securely connects the panels together and allows easy installation of the panels.

The object underlying the invention is achieved with the feature combination according to claim 1. Preferred embodiments may be taken from the subclaims.

According to claim 1, the fastening system according to the invention is characterized in that in an insertion direction DE, in which the surface and counter surface are moved relative to each other when connecting the holding profiles, the friction-increasing layer has a coefficient of friction RN, which is smaller than the coefficient of friction R _H. , In a preferred embodiment, the friction-increasing layer has the increased coefficient of friction R _H in the opposite direction to the insertion direction. Additionally or alternatively, the increased coefficient of friction RH can result in a direction transverse to the insertion direction DE.

Become holding profiles for connecting panels nested, wherein the at least one surface is displaced along the mating surface, it must be due to the friction-enhancing layer according to the invention for separating the holding profiles, so when moving against or transverse to the insertion DE a greater force applied than in the Connecting the holding profiles, wherein the connecting of the holding profiles with a movement in the insertion direction D _{E is} accompanied. The insertion direction D _E can be a linear movement, a rotary movement or a combination of both.

In the limiting case, short and long edges can be the same length. The corresponding panel would be square.

In a preferred embodiment, the layer is formed as a flocking layer. The flocking layer may comprise a base layer and flock fibers attached to the base layer at a fixed end and facing away from the base layer with a loose end. The flock fibers may be inclined to the direction of insertion DE. If a surface provided with such a flocking layer is pushed onto an opposing surface in the insertion surface D _E , then the flock fibers form a smaller resistance to the relative displacement of surface and counter surface due to their inclination compared to a movement of the counter surface opposite to the insertion direction, since in this case the flock fibers would be directed against this movement.

The flock fibers can have a constant slope over their entire length. For example, the flock fibers may already be inclined in the area of the fixed ends to the base layer. The tilting of the flock fibers based on the base layer takes place during the production of the flocking layer, ie even before joining the holding profiles, the flock fibers are inclined. - A -

In addition, a length of the flock fibers may be selected to be larger than a gap between the flocked layer surface and the mating surface that forms when the retaining profiles are bonded together. When joining surface and counter surface, the flock fibers are folded in the direction of insertion D _{E in} addition to their original inclination obliquely backwards or bent, and then engage in the counter surface with increased inclination.

The fastening system can be designed such that the holding profiles at the long edges correspond to the holding profiles at the short edges. Thus, it would in principle be possible to connect a holding profile on a short edge with a holding profile on a long edge, which could create a herringbone pattern when laying the panels.

Alternatively, the holding profiles may be formed on the long edges as the first holding profiles and on the short edges as the second holding profiles, which then differ first holding profiles of second holding profiles. In this case, the first holding profiles of the long edges preferably form a positive connection in the direction D1 and a positive connection in the direction D2, while the second lateral profiles of the short edges form a positive connection only in one direction, either in the direction D1 or in the direction D2. This can significantly simplify the laying of panels, since they only have to be pushed into each other or must be placed on top of one another to connect the panels to their short edges.

The holding profiles, for example the first and second holding profiles of the embodiment described above, may have a groove with a first groove side wall and with a second groove side wall and a spring with a bottom and with an upper side, wherein the spring engages in the groove when the holding profiles are connected, whereby the positive connection in direction D1 is formed perpendicular to the laying plane. The friction-increasing layer may be provided on the top, on the bottom or on the top and bottom of the spring. Alternatively or additionally, the friction-increasing layer on the first groove side wall and / or on the second groove side wall be provided. In addition, it is possible that the entire spring, so the bottom, top and front of the spring is equipped with the friction-increasing layer. This applies mutatis mutandis to the groove, in which case next to the first groove side wall and the second groove side wall of the groove bottom also has the friction-increasing layer.

In a preferred embodiment, the holding profiles have a locking element and a locking groove, which receives the locking element in the connected state of the holding profiles, whereby a positive connection in the direction D2 is formed transversely to the connected edges. In this case, locking element and locking groove can be under tension, so that the holding profiles form a press fit. In addition, a clearance can be provided at least in one direction between the locking element and the locking groove, so that a clearance fit between the retaining profiles is provided. In addition, the connection of the holding profiles can also be designed as a transitional fit. A possible pressure between the holding profiles may be due solely to the presence of the friction-increasing layer or increased by the friction-increasing layer.

Locking element and locking groove may be formed so that the holding profiles can be inserted into one another in a mutually inclined position, wherein at least one of the holding profiles to the laying plane has a tilt angle. By pivoting the retaining profiles, so that they lie in one plane, locking element and locking groove can be brought into engagement without mechanical stress.

The holding profiles can be designed such that, despite the friction-enhancing layer, they can be displaced relative to one another along the edges of the panels when the panels are inclined relative to one another.

Also, locking element and locking groove may be formed so that the holding profiles can be pushed towards each other in a substantially planar manner, wherein both holding profiles are preferably in the laying plane. An example of such a design of locking element and Locking groove is a snap or locking connection, which leads to a deformation of an element of the holding profiles when the holding profiles are pushed together, with the deformation decreasing or completely decreasing after engagement.

The friction-increasing layer may be provided on a first side wall and / or on a second side wall of the locking groove. Also, a wall of the locking element may be equipped with the friction-increasing layer.

The bottom of the spring may be convex in cross-section, while the first groove side wall, which cooperates with connected retaining profiles with the underside of the spring, may be concave. Due to the curvature of the underside of the spring and the first groove side wall, an articulated connection can be generated around an axis of rotation parallel to the edges of the connected holding profiles. Due to the curvature an undercut is given, so that the holding profiles form a positive connection in two directions D1, D2.

In a preferred embodiment, the retaining profiles, preferably the short edges, comprise a first hook element and a second hook element, each having a hook web and a hook end, the hook web connecting the hook end to the panel, and wherein in the connected state of the retaining profiles, the hook ends mutually in the direction of D2 behind. An advantage of such trained retaining profiles is that the panels can be easily superimposed to connect the retaining profiles. The friction-increasing layer may be provided on an inner side of the hook end, on an outer side of the hook end, on an end side of the hook end, on a side wall of the hook web and / or on a hook end wall.

Preferably, a Staubnut or dust chamber is provided, which is arranged in the direction of insertion D _E behind the surface provided with the friction-increasing layer. Thus, the dust groove or the dust Chamber absorb flock fibers, which were detached when connecting the holding profiles of the base layer of the flocking.

All embodiments of the invention can be used if the friction-increasing layer in all directions represents an equal frictional resistance or an approximately equal frictional resistance. This can make it difficult to lay the panels, but good results can be achieved with them.

Reference to the embodiments illustrated in the drawings, the invention is explained in detail. Show it:

Figure 1 shows two panels;

Figure 2 shows a first embodiment of retaining profiles;

3 shows the holding profiles of Figure 2 on an enlarged scale;

Figure 4 shows a second embodiment of retaining profiles;

Figure 5 shows a third embodiment of retaining profiles;

FIG. 6 schematically shows a method for laying panels;

Figure 7 shows another method for laying panels.

Figure 1 shows a perspective view of two laminate panels 1, 2, which are of identical design. The laminate panel 1 has an upper side 3 and a lower side 4. A circumferential edge is composed of two long edges 5, 5 'and two short edges 6, 6' together. Due to the identical design panel 2 is provided with the same reference numerals. The panels 1, 2 are provided at the edges 5, 5 ', 6, 6 ¹ with retaining profiles, which are not shown in the figure 1 for the sake of simplicity. Preferred embodiments of retaining profiles can be taken from Figures 2 to 5.

Figure 2 shows as a first embodiment holding profiles 7, T in cross section, wherein in the upper part of Figure 2, the holding profiles 7, T connected to each other and in the lower part of Figure 2 are separated. The retaining profile 7 has a groove 8 which is formed by a lower lip 9 and an upper lip 10. The retaining profile T has a spring 11 which can be inserted into the groove 8 (see upper part of FIG. 2). The spring 11 has an underside 12 and an upper side 13, which extend substantially parallel to a laying plane in which the laminate panels 1, 2 are to be laid.

The lower lip 9 forms a first groove side wall 14 which cooperates with the lower side 12 of the spring 11 when the holding profiles 7, T are connected to one another. At the top, the groove 8 is bounded by a second groove side wall 15. In the connected state of the holding profiles 7, T is the top 13 of the spring 11 at the second groove inner wall 15 at. Thus, the holding profiles 7, T are connected in a direction D1 perpendicular to the laying plane E.

The underside 12 of the spring 11, for example, forms a surface which cooperates with a mating surface in the form of the first groove inner wall 14, when the holding profiles 7, 7 'are interconnected. The underside 12 is provided with a friction-increasing layer 16. This friction-increasing layer 16 causes a frictional force between the bottom 12 of the spring 11 and the first groove inner wall 14 of the groove 8 is increased, which counteracts starting from the connected state 7, T of the holding profiles a separation of these holding profiles. In this case, the frictional force counteracts, on the one hand, a separating movement in the direction D2 and, on the other hand, a movement in the direction D3, which extends in the longitudinal direction of the holding profiles 7, T and in FIG. 2 into the plane of the drawing. The laying plane E is thereby spanned by the directions D2, D3. Not only on the underside 12 of the spring 11, but also on the second groove inner wall 15 of the groove 8, a friction-increasing layer 16 is provided in the embodiment of FIG. This friction-increasing layer 16 on the second groove inner wall 15 ensures that the holding profiles 7, T are firmly connected to each other. In addition, further friction-increasing layers 16 may be attached to the upper side 13 of the groove 11 and to the first groove inner wall 14.

FIG. 3 shows the holding profiles 7, T on an enlarged scale. In contrast to FIG. 2, however, only the friction-increasing layer 16 on the underside 12 of the groove 11 is shown in FIG. The friction increasing layer 16 is formed as a flocking layer 17 comprising a base layer 18 and a plurality of flocking fibers 19. The base layer 18 serves to secure the individual flock fibers to the underside 12 of the spring 11. The flock fibers 19 are fixed to the base layer 18 with a fixed end. A loose or free end of the flock fibers 19 faces away from the base layer 18. As can be seen from FIG. 3, the flock fibers are aligned parallel to one another. The flock fibers 19 are inclined to an insertion direction DE, along which the spring 11 can be pushed into the groove 8. The angle of inclination between the longitudinal extension of the flock fibers 19 and the insertion direction D _E is designated α in FIG. The angle α is less than 90 ° and is preferably 30 to 80 °. The angle α is preferably constant over the entire length of the flock fibers and is set during the production of the flocking layer.

Due to the inclination of the flock fibers, the flocking layer 17 in the insertion direction D _E a coefficient of friction RN, which is smaller than a coefficient of friction RH, which is to be based on when the spring 11 is pushed out of the groove 8.

Figure 4 shows a further embodiment of retaining profiles, which are designated by reference numerals 20, 20 '. Components or features of the holding profiles 20, 20 ', which are similar or identical to components or features of the holding profiles 7, 7' of Figure 2, receive the same reference numerals. Again, the holding profiles 20, 20 'include a spring 11 and a groove 8 through a lower lip. 9 and an upper lip 10 is limited in direction D1. At the lower lip 9, a locking element 21 is formed, which engages in the connected state of the holding profiles 20, 20 '(upper part of Figure 4) in a locking groove 22 which is formed on a bottom 23 of the holding section 20'.

In order to connect the holding profiles 20, 20 'to one another, the holding profile 20' must be angled relative to the holding profile 20, which is indicated in the lower part of FIG. In the angled position according to the lower part of FIG. 4, the retaining profile 20 'with its groove 11 can be inserted into the spring 8 without the locking element 21 being prevented. Thereafter, the holding profile 20 'is pivoted into the laying plane E, whereby locking element 21 and locking groove 22 engage and thus form a positive connection in the direction D2.

In order to strengthen the connection of the holding profiles 20, 20 'in the direction D2, friction-increasing layers 16 are applied to a first groove side wall 14 and to a bottom 12 and to an upper side 13 of the groove 11. As a result, the frictional forces of the connection between the holding profiles 20, 20 'in the direction D 2 can be increased, whereby the positive connection between locking element 21 and locking groove 22 is relieved. As in the embodiment of FIG. 3, the friction-increasing layers 16 may be formed as flocking layers 17 with inclined flock fibers 19.

If the holding profile 20 'is inserted in the holding profile 20, but has not yet been pivoted into the laying plane E, the friction-increasing layers 16 are not or not completely engaged, so that a displacement of the holding profile 20' in the direction D3, ie along the holding profiles 20, 20 ', without great effort is possible.

Figure 5 shows another preferred embodiment for retaining profiles, which are designated 24, 24 '. The holding profiles 24, 24 'comprise two hook profiles 25, 26, which are constructed substantially the same and each consist of a hook web 27 and a hook end 28. In the connected state of the holding profiles 24, 24 'engage behind the hook ends 28 of the Hakenelemen- see the holding profiles 24, 24 '. In order to strengthen the connection in the direction D1, the hook ends 28 each have a friction-increasing layer 16 on an outer side 29. These friction-increasing layers 16 increase the friction between the outer sides 29 of the hook ends 28 and a hook end wall 30. The friction-increasing layers 16 not only provide a firm connection between the support profiles 24, 24 'in the direction D1, but can also provide one Bowing of the panels 1, 2 counteracted. Additionally or alternatively, as shown in FIG. 5, friction-increasing layers 16 'may be provided on at least one of the horizontal sides 31 of the hook elements 25, 26.

Two possible methods are to be outlined with reference to FIGS. 6 and 7, as panels with fastening systems according to FIGS. 1 to 5 can be laid.

FIG. 6 shows three different process steps I ₁ II, IM, wherein the left part of FIG. 6 shows laminate panels A, B, C from above and the right part of FIG. 6 shows the laminate panels A, B, C from the side.

Starting point of the method should be the already laid panel A, which lies in a first row R1. In a second row R2 is the panel

B, which is already connected with its long edge 5 'with the panel A. In order to move the panel C in the second row R2, this is inserted in the laying plane E inclined position with its long edge 5 'in the holding profile on the long edge 5 of the panel A. The holding profiles of the panels A, B ₁ C at the long edges 5, 5 'should correspond to the holding profiles according to FIG. As can be seen from method step I, the panel C with its short edge 6 'is still arranged at a distance from the short edge 6 of the panel B. In method step II, the panel C is pushed in the direction of the panel B, until it abuts the panel B. The holding profiles of the panels

C, B at the short edges 6, 6 'are to correspond to the holding profiles 24, 24' of FIG. In method step IM, the panel C can be folded into the laying plane E, whereby the hook elements 25, 26 (see FIG. 5) engage with one another. Figure 7 shows a method for laying the panels A, B, C ₁ wherein now the holding profiles at the short edges 6, 6 'to the holding profiles 7, T of Figures 2 and 3 should correspond. The representation of the panels A, B, C from above and from the side as well as the representation of the individual method steps I ₁ II, III, IV correspond to the representations of FIG. 6.

As in Figure 5, the already laid panel A in the first row R1 and the already laid panel B in the second row R2 form the starting point. In method step I, the panel C is inserted with its long edge 5 'into the long edge 5 of the panel A, this taking place in an inclined manner. Thereafter, the panel B is pivoted upward from the laying plane E until it reaches the inclined position of the panel C. Thus, the panels C, B are in a same plane. In method step III, the panel C is pushed in the direction of panel B, with the holding profiles 7, T (see FIG. Thereafter, the panels C, B are pivoted together in the laying plane E.

LIST OF REFERENCE NUMBERS

1 panel

2 panels

3 top 4 bottom

5, 5 'long edge

6, 6 'short edge

7, T retaining profile 8 groove 9 lower lip

10 upper lip

11 spring

12 bottom

13 top 14 first groove side wall

15 second groove side wall

16 friction-enhancing layer

17 flocking layer

18 base layer 19 flock fibers

20, 20 'holding profile

21 locking element

22 locking groove

23 underside 24, 24 'holding profile

25 hook element

26 hook element

27 hook stay

28 hook end 29 outside

30 hook end wall

31 horizontal side

D1 direction D2 direction

D3 direction

E level

R1 first row

R2 second row

Claims

claims:

1. Fixing system for square tabular, two long edges (5, 5 ') and two short edges (6, 6') having panels (1, 2), arranged at the edges holding profiles, of which oppositely arranged holding profiles in such a way match that similar panels (1, 2) are connectable to each other, wherein the holding profiles in a connected state form a positive connection in a direction (D1) which extends perpendicular to a laying plane (E), in which the panels (1, 2 ) and / or form a positive fit in one direction (D2) lying in the laying plane (E) and perpendicular to the connected ones

Edges (5, 5 ', 6, 6') extends, wherein the holding profiles at the long edges (5, 5 ') and / or at the short edges (6, 6') have at least one surface which cooperates with a counter surface when the holding profiles are connected to each other and wherein at least the surface or the mating surface has a friction-increasing layer (16) with a raised

Friction coefficient (RH), whereby the connection of the holding profiles is strengthened, characterized in that in an insertion direction (D _E ), in which the surfaces are moved relative to each other when connecting the holding profiles, the friction-increasing layer (16) has a coefficient of friction (RN) which is smaller than the coefficient of friction (R _H ).

2. Fastening system according to claim 1, characterized in that the friction-increasing layer (16) has the increased coefficient of friction (RH) in the opposite direction to the insertion direction (D _E ).

3. Fastening system according to claim 1 or 2, characterized in that the friction-increasing layer (16) has the increased coefficient of friction (RH) in a direction transverse to the insertion direction (D _E ).

4. Fastening system according to one of claims 1 to 3, characterized in that the friction-increasing layer (16) as a flocking layer (17) is formed.

A fastening system according to claim 4, characterized in that the flocking layer comprises a base layer (18) and flock fibers (19) fixed to the base layer (18) at a fixed end and having a loose end from the base layer (18 ) pointing away, wherein the flock fibers (19) to the insertion direction (DE) have an inclination angle (α).

6. Fastening system according to claim 4 or 5, characterized in that a length of the flock fibers (19) is greater than a gap between the flocking layer (17) provided surface and the mating surface, which results when the holding profiles are connected together.

7. Fastening system according to one of claims 1 to 6, characterized in that the holding profiles at the long edges (5, 5 ') correspond to the holding profiles at the short edges (6, 6').

8. Fastening system according to one of claims 1 to 6, characterized in that the holding profiles on the long edges (5, 5 ¹ ) as the first holding profiles and on the short edges (6, 6 ') are formed as second holding profiles, wherein the first Holding profiles of the long edges (5, 5 ') form a positive connection in the direction (D1) and a positive connection in the direction (D2) and wherein the second holding profiles of the short edges (6, 6') a positive connection in the direction (D1) or a positive connection in the direction (D2).

9. Fastening system according to one of claims 1 to 8, characterized in that the holding profiles a groove (8) with a first groove side wall (14) and with a second groove side wall (15) and a spring (11) having a bottom (12) and an upper side (13), wherein the spring (11) engages in the groove (8) when the holding profiles are connected, whereby the positive connection in the direction (D1) is formed perpendicular to the laying plane (E).

10. Fastening system according to claim 9, characterized in that the friction-increasing layer (16) on the upper side (13) and / or on the underside (12) of the spring (11) is provided.

11. Fastening system according to claim 9 or 10, characterized in that the friction-increasing layer (16) on the first groove side wall (14) and / or on the second groove side wall (15) is provided.

12. Fastening system according to one of claims 1 to 11, characterized in that the holding profiles have a locking element and a locking groove (22) which receives the locking element (21) in the connected state of the holding profiles, wherein a positive connection in

Direction (D2) is formed perpendicular to the connected edges.

13. Fastening system according to claim 12, characterized in that in the connected state locking element (21) and locking groove (22) are under tension.

14. Fastening system according to claim 12, characterized in that in the connected state between the locking element (21) and locking groove (22) is provided a game.

15. Fastening system according to one of claims 12 to 14, characterized in that the locking element (21) and locking groove (22) are formed so that the retaining profiles can be inserted into each other in a mutually inclined position, wherein at least one of the panels to the laying plane (E) has an inclination angle.

16. Fastening system according to one of claims 12 to 15, characterized in that the holding profiles are formed so that they are in a mutually inclined position along the support profiles to move each other.

17. Fastening system according to one of claims 12 to 16, character- ized in that the locking element (21) and locking groove (22) are formed so that the holding profiles can be pushed together substantially in a planar manner, wherein both holding profiles preferably in the laying plane ( E) lie.

18. Fastening system according to one of claims 12 to 17, characterized in that the friction-increasing layer on a first side wall and / or on a second side wall of the locking groove (22) is provided.

19. Fastening system according to one of claims 12 to 18, characterized in that the friction-increasing layer is provided on at least one wall of the locking element.

20. Fastening system according to one of claims 9 to 19, character- ized in that the underside (12) of the spring (11) is convexly curved in cross-section and the first groove side wall (14) is concave, preferably a hinged connection to a Rotary axis parallel to the connected holding profiles arises.

21. Fastening system according to one of claims 1 to 20, characterized in that the holding profiles preferably at the short edges (6 '), a first hook element (25) and a second hook element (26), each having a hook web (27) and a Hook end (28), wherein the hooked web (27) connects the hook end (28) with the panel (1, 2) and wherein in the connected state of the holding profiles are the

Hook ends (28) engage behind each other in the direction (D2).

22. Fastening system according to claim 21, characterized in that the friction-increasing layer (16) on an inner side of the hook end (28), on an outer side (29) of the hook end (28), on an end face of the hook end (28), on a side wall of the hooked web (27) and / or on a hook end wall (30) is provided.

23. Fastening system according to one of claims 1 to 22, characterized in that a dust groove or a dust chamber is provided, which is preferably arranged in the insertion direction (D _E ) behind the surface provided with the friction-enhancing layer.