Fastener for dismountably assembling laminar elements

Abstract

Fastener ( 4 ) for dismountably assembling laminar elements such as the bottom ( 2 ) and lateral ( 3 ) walls of containers, boxes ( 1 ) and the like comprising, at least, a tongue ( 6 ) having a widened head ( 6 a ) defining a neck ( 6 b ), which is located in one of the elements to be assembled and, at least, a groove ( 5 ) intended for receiving said neck ( 6 b ), located in the other element to be assembled, and whose width is comprised between the width of the neck ( 6 b ) and the width of the widened ( 6 a ) head; the groove ( 5 ) having, at least, an open side ( 7 ) where a resiliently displaceable retainer ( 8 ) is provided.

1 . A fastener arrangement ( 4 ) for dismountably assembling planar or laminar elements such as the bottom ( 2 ) and lateral ( 3 ) walls of containers, boxes ( 1 ) and the like, the fastener arrangement comprising:
 a first planar or laminar element including a tongue ( 6 ) having a widened head ( 6   a ) defining a neck ( 6   b ); and   a second planar or laminar element configured to be assembled to the first planar or laminar element, the second planar or laminar element including a groove ( 5 ) sized, adapted and configured to receive said neck ( 6   b ), the groove ( 5 ) having a width greater than a width of the neck ( 6   b ) and less than a width of the widened head ( 6   a ), the groove ( 5 ) having an open side ( 7 ) where a resiliently displaceable retainer ( 8 ) is provided.   
     
     
         2 . The fastener arrangement ( 4 ) for dismountably assembling planar or laminar elements according to  claim 1 , wherein the groove ( 5 ) comprises a closed side ( 7   a ) opposite the open side ( 7 ). 
     
     
         3 . The fastener arrangement ( 4 ) for dismountably assembling planar or laminar elements according to  claim 1 , wherein the tongue ( 6 ) has a general T shape or anchor shape, and has contact faces ( 10 ) configured and adapted to be parallel to contact edges ( 5   a ) of the groove ( 5 ) when the second planar or laminar element is assembled to the first planar or laminar element. 
     
     
         4 . The fastener arrangement ( 4 ) for dismountably assembling planar or laminar elements according to  claim 1 , wherein the retainer ( 8 ) comprises a strip ( 11 ) having a resiliently displaceable free end ( 11   a ) adjacent the open side ( 7 ) of the corresponding groove ( 5 ), and another end ( 11   b ) rigidly connected to a body of the second planar or laminar element. 
     
     
         5 . The fastener arrangement ( 4 ) for dismountably assembling planar or laminar elements according to  claim 4 , wherein a width of the strip ( 11 ) is slightly greater than the width of the widened head ( 6   a ) of the corresponding tongue ( 6 ). 
     
     
         6 . The fastener arrangement ( 4 ) for dismountably assembling planar or laminar elements according to claim 4 , wherein the strip ( 11 ) has a tearable end sector ( 11   c ) defined by at least one weakened or perforated line ( 11   d ), the tearable end sector ( 11   c ) having a size that allows for extraction movement of the tongue ( 6 ), the weakened line ( 11   d ) having a mechanical resistance higher than that necessary for bending the strip ( 11 ) when assembling the fastener ( 4 ), and wherein the first planar or laminar element comprises slits ( 20 ) near a detachment point of said tongue ( 6 ) and configured and adapted for allowing for lateral bending of the first planar or laminar element when coupling and uncoupling the first planar or laminar element and the second planar or laminar element. 
     
     
         7 . The fastener arrangement ( 4 ) for dismountably assembling planar or laminar elements according to  claim 6 , wherein the tearable end sector ( 11   c ) is sized to enable a human finger to pass therethrough. 
     
     
         8 . The fastener arrangement ( 4 ) for dismountably assembling planar or laminar elements according to  claim 1 , wherein the retainer ( 8 ) is produced by die-cutting in monoblock configuration of the second planar or laminar element. 
     
     
         9 . The fastener arrangement ( 4 ) for dismountably assembling planar or laminar elements according to  claim 1 , the tongue ( 6 ) is produced by die-cutting in monoblock configuration of the first planar or laminar element. 
     
     
         10 . The fastener arrangement ( 4 ) for dismountably assembling planar or laminar elements according to  claim 9 , wherein the elements to be assembled are made of plastic, wood, wood derivatives, plywood, cardboard and/or metal.