Base section for a collapsible container

Abstract

A base section for a collapsible container for transporting a liquid. The base section has a rectangular base with four sides, two opposite end sections and two opposite side sections pivotally connected to each side of the base, a top section pivotally connected to a side section or an end section, and a liner for storing a liquid. The base section includes a base frame with two opposite end bars, two opposite side bars, a number of cross bars connecting the side bars, with the base resting on the cross bars. Along two opposite sides on the base, vertical flanges are made which, in the free state of the base, have a larger mutual spacing at the top edges than the width of the base. The opposite side faces of the side bars have a lower section which, at a given location along the side bars, is extending upwards from the cross bars to a height that mainly corresponds to the height of the base flanges at the same location in the longitudinal direction, and an upper section extending upwards in tandem of the lower section. The mutual spacing between the opposite side faces of the side bars is larger than the width of the base at both the lower and the upper sections whereas the mutual distance between the two lower sections is smaller than the mutual spacing between the upper edges of the flanges in the free state of the base. This allows the base to be less expensive and easier to fasten in the base section.

What is claimed is:  
     
         1 . A base section for a collapsible container for transporting a liquid whereby the collapsible container comprises a generally rectangularly shaped base section having four sides, two opposite end sections and two opposite side sections pivotally connected to each side of the base section, a top section pivotally connected to a side section or an end section, and a liner for storing the liquid, with the base section comprising a base frame with two opposite end bars, two opposite side bars, a number of cross bars connecting the side bars, and a base resting on the cross bars, wherein vertical flanges are made along two opposite sides on the base, said flanges have a mutual spacing at the top edges which is larger than the width of the base in the free state of the base, that the opposite side faces of the side bars each have a lower section which, at a given location along the side bars, is extending upwards from the cross bars to a height that mainly corresponds to the height of the base flanges at the same location in the longitudinal direction, and an upper section extending upwards in tandem with the lower section, that the mutual spacing between the opposite side faces of the side bars is larger than the width of the base at both the lower and the upper sections whereas the mutual spacing between the two lower sections is smaller than the mutual spacing between the top edges of the flanges in the free state of the base.  
     
     
         2 . A base section according to  claim 1 , wherein the lower section passes into the upper section along a transverse edge area extending crosswise to the respective side face.  
     
     
         3 . A base section according to  claim 1 , wherein the width of the transverse edge areas corresponds to the thickness of the base flanges.  
     
     
         4 . A base section according to  claim 1 , wherein the flanges and the base are made in one piece of the same plate.  
     
     
         5 . A base section according to  claim 4 , wherein the flanges and the base are made from a single metal plate.  
     
     
         6 . A base section according to  claim 1 , wherein the base forms an acute angle with each flange of between 60° and 89°.  
     
     
         7 . A base section according to  claim 1 , wherein the base forms an acute angle with each flange of between 75° and 89°.  
     
     
         8 . A base section according to  claim 1 , wherein the base forms an acute angle with each flange of between 85° and 89°.  
     
     
         9 . A base section according to  claim 1 , wherein at least the two opposite side bars each consist of a lower bar and an upper bar, and that the transverse edge area is formed by a piece of the underside of the upper bar extending out over the lower bar.  
     
     
         10 . A base section according to  claim 1 , wherein the base is placed in an inclined position towards an end bar in which is made an opening for a discharge spout for the liner of the container.  
     
     
         11 . A base section according to  claim 1 , wherein other vertical flanges are made along the two other opposite sides on the base, said flanges are arranged to cooperate with the opposite side faces of the end bars in the same way as the first opposite sides on the base cooperate with the opposite side faces of the side bars.