Patent ID: 7861878
Filing Date: 2011-01-04
Classification: B65D

Abstract:
1. A fastening device for folding boxes, said boxes comprising a base or bottom with parallel edges two by two and four folding lateral walls coupled in jointed fashion to edges of the base, the four lateral walls including first and second end walls and first and second side walls, the first and second ends walls being opposite each other, said fastening device comprising: first and second vertically displaceable central control pieces incorporated into the first and second end walls, respectively, each vertical displaceable central control piece having short frontal extensions with thickenings at the ends thereof, said short frontal extensions being configured to fit into complementary grooves of a respective end wall to secure each said central control piece to the respective end wall, and each said vertically displaceable central control piece being associated with a pair of horizontal operating bolts, each said pair of horizontal operating bolts being arranged such that in a first position, each said pair of horizontal operating bolts fastens the respective end wall to the first and second side walls at adjacent edges, while in a second position the fastening is released in order to be able to collapse the four lateral walls; wherein each said vertical displaceable central control piece is guided and fits between two vertical ribs integrally disposed in the respective end wall and includes certain elastic spring elements which link each said central control piece with said pair of bolts to which each said central control piece is associated, for each said vertical displaceable central control piece, said spring elements are configured to maintain said pair of bolts in an engagement and fastening position of said pair of bolts when at rest, while a release position of said pair of bolts being when said central control piece has been displaced upwards, said spring elements being configured to pull said bolts towards the release position accumulating elastic energy which presses said pair of bolts towards the engagement and fastening position; and wherein each said vertical displaceable central control piece extends in a longitudinal direction, and for each said vertical displaceable central control piece, each frontal extension of said frontal extensions extends from said vertical displaceable central control piece in a direction substantially perpendicular to the longitudinal direction of said vertical displaceable central control piece.