Parquet strip comprising a removable interlocking system

Abstract

The invention relates to a parquet strip ( 1 ) comprising a first front edge ( 2 ) and a second front edge ( 3 ), the first front edge ( 2 ) being arranged to engage with a second front edge ( 3 ) of another parquet strip, the first front edge ( 2 ) comprising a first front wall and a tongue ( 6 ) comprising a first convex bearing surface arranged on a first side of the tongue, a second bearing surface arranged on a second side of the tongue opposite to the first side, the second bearing surface being extended in the direction of the distal end of the tongue by a rounded portion, the second front edge ( 3 ) comprising a second front wall having a groove ( 7 ) defining an opening, the width of the opening of the groove ( 7 ) being equal to the distance between the first bearing surface of the tongue ( 6 ) and the rounded portion increased by a functional clearance (J 1 ) dimensioned so that the ratio of the distance between the first bearing surface of the tongue ( 6 ) and the rounded portion and the width of the opening of the groove ( 7 ) is substantially between 0.7 and 0.99, the length of the tongue ( 6 ), considered between the first front wall and an end of the tongue located on the tongue ( 6 ) opposite the first front wall, being less than the depth of the groove ( 7 ).

1 . A floorboard comprising a first main surface intended to form an apparent surface and a second main surface opposite to the first main surface and intended to bear against a support, a first front edge and a second front edge, the first front edge being arranged to cooperate with a second front edge of another floorboard,
 the first front edge comprising a first front wall ( 28 ,  21 ) and a tongue extending from the first front wall ( 28 ,  21 ) towards a distal end opposite to the first front wall ( 28 ,  21 ), the tongue comprising a first convex bearing surface disposed on a first side of the tongue, a second bearing surface disposed on a second side of the tongue opposite to the first side, the second bearing surface being extended in the direction of the distal end of the tongue by a rounded portion,   the second front edge comprising a second front wall ( 11 ,  16 ) having a groove defining an opening and an inner wall extending from a first end of the opening, the inner wall comprising a first concave bearing surface disposed on a first side of the opening, a bottom surface and a second bearing surface disposed on a second side of the opening disposed opposite to the first side and extending to a second end of the opening;   the width of the opening of the groove being equal to the distance between the first bearing surface of the tongue and the rounded portion increased by a functional clearance dimensioned so that the ratio of the distance between the first bearing surface of the tongue and the rounded portion to the width of the opening of the groove is substantially comprised between 0.7 and 0.99,   the length of the tongue considered between the first front wall ( 28 ,  21 ) and one end of the tongue disposed on the tongue opposite to the first front wall ( 21 ,  28 ) being less than the depth of the groove considered between the opening of the groove and the bottom surface of the groove.   
     
     
         2 . The floorboard according to  claim 1 , wherein said floorboard is made of massive wood. 
     
     
         3 . The floorboard according to any of  claims 1  comprising a wear layer extending from the first main surface in a direction orthogonal to a plane of the floorboard and
 representing a fraction of a thickness of the floorboard of at least 25%, the thickness of the floorboard being considered between the first main surface and the second main surface, the tongue and the groove being positioned relative to the thickness of the floorboard in a lower layer of the floorboard disposed below the wear layer. 
 
     
     
         4 . The floorboard according to  claim 1 , comprising a chamfer disposed on the other side of the rounded portion with respect to the second bearing surface of the tongue. 
     
     
         5 . The floorboard according to  claim 4 , wherein the chamfer has an angle of inclination with respect to an insertion axis comprised between 10 degrees and 45 degrees. 
     
     
         6 . The floorboard according to  claim 1 , wherein the second bearing surface of the tongue is configured to be substantially planar. 
     
     
         7 . The floorboard according to  claim 3 , further comprising a first lateral edge and a second lateral edge disposed opposite the first lateral edge, the first lateral edge comprising a first flange extending along a plane of the floorboard and an anchoring abutment extending from the first flange in a direction transverse to a plane of the floorboard, the second lateral edge comprising a second flange extending in the plane of the board and an anchoring cavity provided in the second flange, said anchoring cavity being of complementary shape to the anchoring abutment and intended to receive the anchoring abutment of a neighboring floorboard. 
     
     
         8 . The floorboard according to  claim 7 , wherein the first flange extends from the first main surface, the thickness of the first flange is greater than the thickness of the wear layer, and the anchoring abutment is disposed in the lower layer, or
 the second flange extends from the first main surface, the thickness of the second flange is greater than the thickness of the wear layer, and the anchoring cavity is disposed in the lower layer.   
     
     
         9 . The floorboard according to  claim 1 , wherein the tongue has a bearing point disposed in the direction of the distal end of the tongue with respect to the first bearing surface of the tongue, and the inner wall of the groove has an abutment surface disposed in the extension of the first bearing surface of the groove, the bearing point being configured to come into abutment on the abutment surface of a neighboring floorboard when the tongue is introduced into the groove. 
     
     
         10 . The floorboard according to  claim 9 , wherein the first bearing surface of the tongue is arranged to slide on the first bearing surface of the groove of a neighboring floorboard between:
 an initial sliding position in which the bearing point belongs to a plane of the opening; and   a final sliding position in which the bearing point is in contact with the abutment surface.   
     
     
         11 . The floorboard according to  claim 1 , wherein the second bearing surface of the tongue is arranged to bear against the second bearing surface of the groove.