Fastening system for slab-like panels

Abstract

A fastening system for rectangular slab-like panels having two long edges and two short edges and including retaining profiles arranged on the edges, of which oppositely arranged retaining profiles match one another in such a way that identical panels can be connected to one another. The retaining profiles in a connected state produce a form fit in a direction which extends perpendicularly to a laying plane in which the panels are to be laid, and/or produce a form fit in a direction which lies in the laying plane and extends perpendicularly to the connected edges. The retaining profiles have on the long edges and/or on the short edges at least one surface which interacts with a complementary surface when the retaining profiles are connected to one another. At least the surface or the complementary surface or the complementary surface includes a friction-increasing layer with an elevated first coefficient of friction, thereby strengthening the connection of the retaining profiles, wherein in a direction of insertion, in which the surfaces are moved relative to one another when connecting the retaining profiles, the friction-increasing layer has a second coefficient of friction which is less than the first coefficient of friction.

1 . A fastening system for rectangular slab-like panels having two long edges ( 5 ,  5 ′) and two short edges ( 6 ,  6 ′) and having retaining profiles arranged on the edges, of which opposing retaining profiles match each other so that similar panels ( 1 ,  2 ) can be connected to one another, in a connected state, the retaining profiles produce a form-locking engagement in a direction (D 1 ) that extends perpendicular to a laying plane (E) in which the panels ( 1 ,  2 ) are to be laid and/or produce a form-locking engagement in a direction (D 2 ) that lies in the laying plane (E) and extends perpendicular to the connected edges ( 5 ,  5 ′,  6 ,  6 ′), the retaining profiles on the long edges ( 5 ,  5 ′) and/or on the short edges ( 6 ,  6 ′) have at least one surface that cooperates with a counterpart surface when the retaining profiles are connected to each other, and at least a surface or the counterpart surface has a friction-increasing layer ( 16 ) with an increased coefficient of friction (R H ), thus strengthening a connection of the retaining profiles, the fastening system comprising: in an insertion direction (D E ) in which the surfaces are moved in relation to each other as the retaining profiles are being connected, the friction-increasing layer ( 16 ) having a coefficient of friction (R N ) that is less than the increased coefficient of friction (R H ). 
   
   
       2 . The fastening system as recited in  claim 1 , wherein the friction-increasing layer ( 16 ) has the increased coefficient of friction (R H ) in the direction opposite from the insertion direction (D E ). 
   
   
       3 . The fastening system as recited in  claim 2 , wherein the friction-increasing layer ( 16 ) has the increased coefficient of friction (R H ) in a direction perpendicular to the insertion direction (D E ). 
   
   
       4 . The fastening system as recited in  claim 3 , wherein the friction-increasing layer ( 16 ) is embodied in the form of a flocking layer ( 17 ). 
   
   
       5 . The fastening system as recited in  claim 4 , wherein the flocking layer includes a base layer ( 18 ) and flocking fibers ( 19 ) that are fastened to the base layer ( 18 ) at a fixed end and that point away from the base layer ( 18 ) at a free end, and the flocking fibers ( 19 ) have an inclination angle (α) in relation to the insertion direction (D E ). 
   
   
       6 . The fastening system as recited in  claim 5 , wherein a length of the flocking fibers ( 19 ) is greater than a gap distance between the surface with the flocking layer ( 17 ) and the counterpart surface, and a gap forms when the retaining profiles are connected to each other. 
   
   
       7 . The fastening system as recited in  claim 6 , wherein the retaining profiles on the long edges ( 5 ,  5 ′) correspond to the retaining profiles on the short edges ( 6 ,  6 ′). 
   
   
       8 . The fastening system as recited in  claim 6 , wherein the retaining profiles on the long edges ( 5 ,  5 ′) formed as first retaining profiles and the retaining profiles on the short edges ( 6 ,  6 ′) are formed as second retaining profiles, the first retaining profiles on the long edges ( 5 ,  5 ′) produce a form-locking engagement in a first direction (D 1 ) and a form-locking engagement in a second direction (D 2 ), while the second retaining profiles of the short edges ( 6 ,  6 ′) produce a form-locking engagement in the first direction (D 1 ) or a form-locking engagement in the second direction (D 2 ). 
   
   
       9 . The fastening system as recited in  claim 8 , wherein the retaining profiles have a groove ( 8 ) with a first groove side wall ( 14 ) and a second groove side wall ( 15 ) and have a tongue ( 11 ) with a lower side ( 12 ) and an upper side ( 13 ), the tongue ( 11 ) engages in the groove ( 8 ) when the retaining profiles are connected, to produce the form-locking engagement in the first direction (D 1 ) perpendicular to the laying plane (E). 
   
   
       10 . The fastening system as recited in  claim 9 , wherein the friction-increasing layer ( 16 ) is on the upper side ( 13 ) and/or the lower side ( 12 ) of the tongue ( 11 ). 
   
   
       11 . The fastening system as recited in  claim 10 , wherein the friction-increasing layer ( 16 ) is on the first groove side wall ( 14 ) and/or the second groove side wall ( 15 ). 
   
   
       12 . The fastening system as recited in  claim 11 , wherein the retaining profiles have a locking element and a locking groove ( 22 ) that receives the locking element ( 21 ) when the retaining profiles are in the connected state to produce a form-locking engagement in the second direction (D 2 ) perpendicular to the connected edges. 
   
   
       13 . The fastening system as recited in  claim 12 , wherein the locking element ( 21 ) and locking groove ( 22 ) are under stress in the connected state. 
   
   
       14 . The fastening system as recited in  claim 12 , wherein there is a play between the locking element ( 21 ) and the locking groove ( 22 ) in the connected state. 
   
   
       15 . The fastening system as recited in  claim 14 , wherein the locking element ( 21 ) and the locking groove ( 22 ) are formed so that it is possible to insert the retaining profiles into each other when they are in an inclined position in relation to each other, with at least one of the panels being at an inclination angle in relation to the laying plane (E). 
   
   
       16 . The fastening system as recited in  claim 15 , wherein the retaining profiles slide in relation to each other along the retaining profiles when they are in an inclined position in relation to each other. 
   
   
       17 . The fastening system as recited in  claim 16 , wherein the locking element ( 21 ) and the locking groove ( 22 ) are formed so that the retaining profiles are able to slide against each other in an essentially planar fashion, with both of the retaining profiles preferably situated in the laying plane (E). 
   
   
       18 . The fastening system as recited in  claim 17 , wherein the friction-increasing layer is on a first side wall and/or on a second side wall of the locking groove ( 22 ). 
   
   
       19 . The fastening system as recited in  claim 18 , wherein the friction-increasing layer is on at least one wall of the locking element. 
   
   
       20 . The fastening system as recited in  claim 19 , wherein the lower side ( 12 ) of the tongue ( 11 ) is convexly curved in cross section and the first groove side wall ( 14 ) is concavely curved for producing an articulated connection around a rotation axis parallel to the connected retaining profiles. 
   
   
       21 . The fastening system as recited in  claim 20 , wherein the retaining profiles have a first hook element ( 25 ) and a second hook element ( 26 ) that each have a hook stem ( 27 ) and a hook end ( 28 ), the hook stem ( 27 ) connects the hook end ( 28 ) to the panel ( 1 ,  2 ) and in the connected state of the retaining profiles the hook ends ( 28 ) engage each other in the second direction (D 2 ). 
   
   
       22 . The fastening system as recited in  claim 21 , wherein the friction-increasing layer ( 16 ) is on an inside of the hook end ( 28 ), on an outside ( 29 ) of the hook end ( 28 ), on an end surface of the hook end ( 28 ), on a side wall of the hook stem ( 27 ), and/or on a hook end wall ( 30 ). 
   
   
       23 . The fastening system as recited in  claim 22 , wherein a dust groove or a dust chamber is situated behind a surface with the friction-increasing layer, when viewed in the insertion direction (D E ). 
   
   
       24 . The fastening system as recited in  claim 1 , wherein the friction-increasing layer ( 16 ) has the increased coefficient of friction (R H ) in a direction perpendicular to the insertion direction (D E ). 
   
   
       25 . The fastening system as recited in  claim 1 , wherein the friction-increasing layer ( 16 ) is embodied in the form of a flocking layer ( 17 ). 
   
   
       26 . The fastening system as recited in  claim 25 , wherein the flocking layer includes a base layer ( 18 ) and flocking fibers ( 19 ) that are fastened to the base layer ( 18 ) at a fixed end and that point away from the base layer ( 18 ) at a free end, and the flocking fibers ( 19 ) have an inclination angle (α) in relation to the insertion direction (D E ). 
   
   
       27 . The fastening system as recited in  claim 4 , wherein a length of the flocking fibers ( 19 ) is greater than a gap distance between the surface with the flocking layer ( 17 ) and the counterpart surface, and a gap forms when the retaining profiles are connected to each other. 
   
   
       28 . The fastening system as recited in  claim 1 , wherein the retaining profiles on the long edges ( 5 ,  5 ′) correspond to the retaining profiles on the short edges ( 6 ,  6 ′). 
   
   
       29 . The fastening system as recited in  claim 1 , wherein the retaining profiles on the long edges ( 5 ,  5 ′) are formed as first retaining profiles and the retaining profiles on the short edges ( 6 ,  6 ′) are formed as second retaining profiles, the first retaining profiles on the long edges ( 5 ,  5 ′) produce a form-locking engagement in a first direction (D 1 ) and a form-locking engagement in a second direction (D 2 ), while the second retaining profiles of the short edges ( 6 ,  6 ′) produce a form-locking engagement in the first direction (D 1 ) or a form-locking engagement in the second direction (D 2 ). 
   
   
       30 . The fastening system as recited in  claim 1 , wherein the retaining profiles have a groove ( 8 ) with a first groove side wall ( 14 ) and a second groove side wall ( 15 ) and have a tongue ( 11 ) with a lower side ( 12 ) and an upper side ( 13 ), the tongue ( 11 ) engages in the groove ( 8 ) when the retaining profiles are connected to produce the form-locking engagement in the first direction (D 1 ) perpendicular to the laying plane (E). 
   
   
       31 . The fastening system as recited in  claim 30 , herein the friction-increasing layer ( 16 ) is on the upper side ( 13 ) and/or the lower side ( 12 ) of the tongue ( 11 ). 
   
   
       32 . The fastening system as recited in  claim 9 , wherein the friction-increasing layer ( 16 ) is on the first groove side wall ( 14 ) and/or the second groove side wall ( 15 ). 
   
   
       33 . The fastening system as recited in  claim 1 , wherein the retaining profiles have a locking element and a locking groove ( 22 ) that receives the locking element ( 21 ) when the retaining profiles are in the connected state to produce a form-locking engagement in the second direction (D 2 ) perpendicular to the connected edges. 
   
   
       34 . The fastening system as recited in  claim 33 , wherein the locking element ( 21 ) and locking groove ( 22 ) are under stress in the connected state. 
   
   
       35 . The fastening system as recited in  claim 33 , wherein there is a play between the locking element ( 21 ) and the locking groove ( 22 ) in the connected state. 
   
   
       36 . The fastening system as recited in  claim 33 , wherein the locking element ( 21 ) and the locking groove ( 22 ) are formed so that it is possible to insert the retaining profiles into each other when they are in an inclined position in relation to each other with at least one of the panels being at an inclination angle in relation to the laying plane (E). 
   
   
       37 . The fastening system as recited in  claim 33 , wherein the retaining profiles slide in relation to each other along the retaining profiles when they are in an inclined position in relation to each other. 
   
   
       38 . The fastening system as recited in  claim 33 , wherein the locking element ( 21 ) and the locking groove ( 22 ) are formed so that the retaining profiles are able to slide against each other in an essentially planar fashion, with both of the retaining profiles preferably situated in the laying plane (E). 
   
   
       39 . The fastening system as recited in  claim 33 , wherein the friction-increasing layer is on a first side wall and/or on a second side wall of the locking groove ( 22 ). 
   
   
       40 . The fastening system as recited in  claim 33 , wherein the friction-increasing layer is on at least one wall of the locking element. 
   
   
       41 . The fastening system as recited in  claim 9 , wherein the lower side ( 12 ) of the tongue ( 11 ) is convexly curved in cross section and the first groove side wall ( 14 ) is concavely curved for producing an articulated connection around a rotation axis parallel to the connected retaining profiles. 
   
   
       42 . The fastening system as recited in  claim 1 , wherein the retaining profiles have a first hook element ( 25 ) and a second hook element ( 26 ) that each have a hook stem ( 27 ) and a hook end ( 28 ), the hook stem ( 27 ) connects the hook end ( 28 ) to the panel ( 1 ,  2 ) and in the connected state of the retaining profiles the hook ends ( 28 ) engage each other in the second direction (D 2 ). 
   
   
       43 . The fastening system as recited in  claim 42 , wherein the friction-increasing layer ( 16 ) is on an inside of the hook end ( 28 ), on an outside ( 29 ) of the hook end ( 28 ), on an end surface of the hook end ( 28 ), on a side wall of the hook stem ( 27 ), and/or on a hook end wall ( 30 ). 
   
   
       44 . The fastening system as recited in  claim 1 , wherein a dust groove or a dust chamber is situated behind a surface with the friction-increasing layer, when viewed in the insertion direction (D E ).