Weight unit for gymnastic apparatus

Abstract

In a gymnastic apparatus the weight unit ( 11 ) is provided with a stack ( 19 ) of plates ( 20 ) formed by multiple plates ( 20 ) placed one on top of the other and having a longitudinal symmetric axis ( 14 ); a guide column ( 12 ) coaxial to the axis ( 14 ) engaged by the plates ( 20 ) with possibility of movement.

1 ) Weight unit for a gymnastic apparatus comprising a stack ( 19 ) of plates ( 20 ) with longitudinal symmetric axis ( 14 ) formed by multiple plates ( 20 ) placed one on top of the other; being characterised by the presence of a first guide column ( 12 ) coaxial to the axis ( 14 ) and engaged by the plates ( 20 ) with possibility of movement.  
     
     
         2 ) Weight unit as defined in  claim 1 , in which the first column ( 12 ) extends through the plates ( 20 ).  
     
     
         3 ) Weight unit as defined in  claim 1 , in which the first column ( 12 ) extends around the plates ( 20 ).  
     
     
         4 ) Weight unit as defined in any of the foregoing claims, comprising a lifting device ( 6 ) of the plates ( 20 ) composed of a rod ( 26 ) in basically coaxial position to the axis ( 14 ) suitable to engage the plates ( 20 ) with possibility of movement; a locking pin ( 28 ) to block the rod ( 26 ) in axial position on one of the plates ( 20 ); at least one pulley ( 29 ); and at least a traction cable ( 25 ) wound around the pulley ( 29 ) and hooked to the rod ( 26 ).  
     
     
         5 ) Weight unit as defined in  claim 4 , in which the pulley ( 29 ) is fitted to the first column ( 12 ) with possibility of rotation.  
     
     
         6 ) Weight unit as defined in  claim 4  or  5 , in which the first column ( 12 ) extends through the plates ( 20 ) and has a channel ( 18 ) capable of housing the rod ( 26 ).  
     
     
         7 ) Weight unit as defined in  claim 6 , in which the first column ( 12 ) comprises two elongated elements ( 15 ) basically parallel to the axis ( 14 ) and arranged on opposite sides of the axis ( 14 ) to define the channel ( 18 ).  
     
     
         8 ) Weight unit as defined in  claim 4  or  5 , in which the first column ( 12 ) extends around the plates ( 20 ) and has a slot ( 34 ) through the first column ( 12 ) capable of housing the locking pin ( 28 ).  
     
     
         9 ) Weight unit as defined in any of the foregoing claims, in which the first column ( 12 ) is engaged by the plates ( 20 ) in fixed angular position.  
     
     
         10 ) Weight unit as defined in any of the foregoing claims, comprising a second guide column ( 32 ) coaxial to the axis ( 14 ) and engaged by the plates ( 20 ) with possibility of movement.  
     
     
         11 ) Weight unit as defined in  claim 10 , in which the first and second column ( 12 ,  32 ) extend through the plates ( 20 ) and around the plates ( 20 ), respectively.  
     
     
         12 ) Weight unit as defined in  claim 10  or  11 , in which at least one of the first and second column ( 12 ) is engaged by the plates ( 20 ) in fixed angular position.  
     
     
         13 ) Weight unit as defined in any of the foregoing claims, comprising shock-absorbing means ( 22 ) capable of supporting the stack ( 19 ) of plates ( 20 ).  
     
     
         14 ) Gymnastic apparatus comprising a weight unit as defined in any of the foregoing claims.