Joining system and method for floor boards and boards therefor

Abstract

The invention relates to a joining system and method for floorboards, panels and sheaves, but foremost for parquetry. The system comprises boards intended to be joined together, wherein a first board has a groove fitting with a tenon in a second board. According to the invention, the first board (A) has has a groove ( 2 ) provided with a rib on the top side of a lower edge, and the second board (B) has a tenon ( 1 ) provided with a ridge on the underside. A cut ( 3 ) is provided in the lower corner of the groove. The cut ( 3 ) makes the lower edge of the groove more flexible and can also take up excessive glue. Through this, the joining will be very simple to perform, whilst at the same time providing a strong joint.

1 . A joining system for floor boards, comprising boards (A, B) intended to be joined with each other, wherein a first board (A) has a groove ( 2 ) provided with a rib ( 4 ) on the top side of a lower edge, and a second board (B) has a tenon ( 1 ) provided with a ridge ( 6 ) on the underside, and wherein a cut ( 3 ) is provided in the lower corner of the groove ( 2 ).  
     
     
         2 . A joining system according to  claim 1 , wherein the cut ( 3 ) is angled so that the inner end is lower than the opening.  
     
     
         3 . A joining system according to  claim 2 , wherein the cut ( 3 ) is angled about 5-15°.  
     
     
         4 . A joining system according to  claim 2 , wherein the cut ( 3 ) is angled about 10°.  
     
     
         5 . A joining system according to any one of  claims 1  to  4 , wherein the length of the cut is in the range of 2-7 mm.  
     
     
         6 . A joining system according to any one of  claims 1  to  4 , wherein the length of the cut is about 7 mm.  
     
     
         7 . A joining system according to any one of  claims 1  to  6 , wherein the short sides of the boards are provided with grooves and tenons fitting into each other.  
     
     
         8 . A joining system according to  claim 7 , wherein the grooves on the shorts sides are provided with ribs ( 4 ) on the top side of a lower edge and the tenons on the shorts sides are provided with ridges ( 6 ) on the underside, and cuts ( 8 ) are provided in the lower comer of the grooves ( 2 ).  
     
     
         9 . A board for a joining system, having a groove ( 2 ) on a first long side of the board, and a tenon ( 1 ) on a second long side of the board, wherein the groove ( 2 ) is provided with a rib ( 4 ) on the top side of a lower edge and the tenon ( 1 ) is provided with a ridge ( 6 ) on the underside, thus allowing identical such boards to be joined with each other, and wherein a cut ( 3 ) is provided in the lower corner of the groove ( 2 ).  
     
     
         10 . A board according to  claim 9 , wherein the cut ( 3 ) is angled so that the inner end is lower than the opening.  
     
     
         11 . A board according to  claim 10 , wherein the cut ( 3 ) is angled about 5-15°.  
     
     
         12 . A board according to  claim 10 , wherein the cut ( 3 ) is angled about 10°.  
     
     
         13 . A board according to any one of  claims 9  to  12 , wherein the length of the cut is in the range of 2-7 mm.  
     
     
         14 . A board according to any one of  claims 9  to  12 , wherein the length of the cut is about 7 mm.  
     
     
         15 . A board according to any one of  claims 9  to  14 , wherein the short sides of the boards are provided with grooves and tenons fitting into each other.  
     
     
         16 . A board according to  claim 15 , wherein the grooves on the shorts sides are provided with ribs ( 4 ) on the top side of a lower edge and the tenons on the shorts sides are provided with ridges ( 6 ) on the underside, and cuts ( 8 ) are provided in the lower comer of the grooves ( 2 ).  
     
     
         17 . A method of joining floor boards, using boards (A, B) intended to be joined with each other, wherein a first board (A) has a groove ( 2 ) provided with a rib ( 4 ) on the top side of a lower edge, and a second board (B) has a tenon ( 1 ) provided with a ridge ( 6 ) on the underside, and wherein a cut ( 3 ) is provided in the lower corner of the groove ( 2 ), comprising the steps of: 
 laying a first board (A) in place;    laying a second board (B) next to board (A) in such a way that the tenon ( 1 ) is located straight in front of the groove ( 2 ) of board (A);    forcing the boards together, thereby letting the ridge ( 6 ) on the tenon ( 1 ) pass over the rib ( 4 ) pressing the lower edge ( 5 ) of the groove downward;    and, when the tenon has passed into the groove ( 2 ), letting the lower edge ( 5 ) spring back locking the ridge ( 6 ) behind the rib ( 4 ).    
     
     
         18 . A method of joining floor boards according to  claim 17 , comprising the further step of applying glue before the boards (A, B) are forced together.  
     
     
         19 . A method of joining floor boards according to  claim 18 , wherein the glue is applied on on top of the tenon ( 1 ) or on the underside of the the top edge of the groove ( 2 ), or both.  
     
     
         20 . A method of joining floor boards according to  claim 18 , wherein the glue is applied in the cut ( 3 ).  
     
     
         21 . A method of joining floor boards according to  claim 18 ,  19  or  20 , wherein the amount of glue is in excess of the amount necessary for the joint, letting the excess amount be collected in the cut ( 3 ) when the boards (A, B) are forced together.  
     
     
         22 . A method of joining floor boards according to  claim 21 , comprising the further step of letting the excess amount collected in the cut ( 3 ) be cured in place.