Hook for attaching a sheet material to a mould-formed body

Abstract

A hook ( 2 ) for attaching a sheet material to a mould-formed body includes two base plates ( 20, 20 ′), a first protrusion ( 3 ) and a second protrusion ( 3 ′) protruding projectingly from the base plates ( 20, 20 ′) so that the end tips ( 32, 32 ′) of the protrusions are situated at a certain distance from each other, to engender an entry aperture ( 40 ) which leads to an anchoring seat ( 4 ) adapted to anchor an attachment element ( 9; 109; 209 ), and a bridge ( 21 ) joined to the base of the protrusions ( 3, 3 ′), so as to form a seat ( 23 ) between the edges ( 22, 22 ′) of the base plates. The seat ( 23 ) can be engaged by a tubular element ( 5 ) so as to cause the protrusions ( 3, 3 ′) to draw together to close the entry aperture ( 40 ) between the tips ( 32, 32 ′) of the protrusions.

1 - 11 . (canceled) 
     
     
         12 . A hook ( 2 ), particularly for attaching a sheet material to a mould-formed body, the hook ( 2 ) comprising:
 two base plates ( 20 ,  20 ′),   a first protrusion ( 3 ) and a second protrusion ( 3 ′) protruding projectingly from said base plates ( 20 ,  20 ′) so that the end tips ( 32 ,  32 ′) of said protrusions are situated at a certain distance from each other to engender an entry aperture ( 40 ) which leads to an anchoring seat ( 4 ) adapted to anchor an attachment element ( 9 ;  109 ;  209 ), and   a bridge ( 21 ) connected to the base of said protrusions ( 3 ,  3 ′), so as to form a seat ( 23 ) between the edges ( 22 ,  22 ′) of said base plates; said seat ( 23 ) being engageable by a tubular element ( 5 ) so as to cause said protrusions ( 3 ,  3 ′) to draw together to close said entry aperture ( 40 ) between the tips ( 32 ,  32 ′) of said protrusions.   
     
     
         13 . A hook ( 2 ) according to  claim 12 , characterised in that the opposed edges ( 22 ,  22 ′) of said base plates ( 20 ,  20 ′) and the lower surface of said connecting bridge ( 21 ) have a substantially arched profile with a radius of curvature equal to that of the tubular element ( 5 ) destined to engage the seat ( 23 ). 
     
     
         14 . A hook ( 2 ) according to  claim 12 , characterised in that said base plates ( 20 ,  20 ′) are disposed on two planes inclined with respect to each other by an angle (θ) other than zero, preferably in the range of 5° to 25°. 
     
     
         15 . A hook ( 2 ) according to  claim 12 , characterised in that each protrusion ( 3 ,  3 ′) consists of a substantially J-shaped hook which has a straight part ( 30 ,  30 ′) and a curved part ( 31 ,  31 ′) ending in said tip ( 32 ,  32 ′), said curved part ( 31 ,  31 ′) engendering an inner loop ( 34 ,  34 ′) acting as a retaining seat for the attachment element ( 109 ;  209 ) and an outer cam surface ( 35 ,  35 ′) acting as a guide towards said aperture ( 40 ) for the attachment element ( 9 ;  109 ;  209 ). 
     
     
         16 . A hook ( 2 ) according to  claim 15 , characterised in that said straight portions ( 30 ,  30 ′) of the two protrusions ( 3 ,  3 ′) are disposed inclined with respect to each other so as to give rise to an angle (α) other than zero, preferably in the range of 30° to 60°, so that said anchoring seat ( 4 ) defined between the two protrusions is substantially heart-shaped. 
     
     
         17 . A hook ( 2 ) according to  claim 15 , characterised in that said tips ( 32 ,  32 ′) of the protrusions are at different levels from each other, so as to direct said fastening element ( 109 ;  209 ) towards the loop ( 34 ) of the first protrusion ( 3 ) or towards the loop ( 34 ′) of the second protrusion ( 3 ′). 
     
     
         18 . An anchoring system ( 1 ) destined to be incorporated into a mould-formed body ( 7 ) to anchor an attachment element ( 9 ;  109 ;  209 ) connected to a sheet material ( 8 ) for covering said mould-formed body ( 7 ), characterised in that it comprises a plurality of hooks ( 2 ) according to  claim 12 . 
     
     
         19 . An anchoring system ( 1 ) according to  claim 18 , characterised in that it comprises a tubular element ( 5 ) disposed in said seat ( 23 ) between the edges ( 22 ,  22 ′) of said base plates of the hooks ( 2 ). 
     
     
         20 . An anchoring system ( 1 ) according to  claim 18 , characterised in that said tubular element ( 5 ) is a metal rod adapted to couple with magnetic means carried in the forming mould. 
     
     
         21 . An anchoring system ( 1 ) according to  claim 18 , characterised in that it comprises a supporting strip ( 6 ) on which said base plates ( 20 ,  20 ′) of each of said hooks ( 2 ) are fixed. 
     
     
         22 . An anchoring system ( 1 ) according to  claim 18 , characterised in that it comprises metal elements, such as microspheres, rivets or clips, disposed in said supporting strip ( 6 ) and/or in said hooks ( 2 ), adapted to couple with magnetic means carried by the forming mould.