Collapsible container for transport and storage

A collapsible pallet container (1) for transport and storage, which collapsible container (1) includes a carrying base part (2) with a width (W) and a length (L), collapsible side walls (30) which are constituted by short side walls (30III and 30IV respectively) and long side walls (30I and 30II respectively), whereby the side walls (30) are moveably attached to the base part (20) and that adjacent side walls (30) are inter-connectable, that at least the two long side walls (30I and 30II) each are provided with a first and a second horizontal folding line (31 and 32 respectively) by being provided with hinges (3), which first horizontal folding line (31) constitutes a lower end (33) of the side wall (30) at which the side wall (30) connects with the base part (20) and which second horizontal folding line (32), which divides the side wall (30) into an upper side wall part (30U) and a lower side wall part (30L, is placed at a distance from the first horizontal folding line (31), between the lower end (33) and an upper rim (34) of the side walls (30) and that the two horizontal folding lines (31 and 32 respectively) are mainly parallel, wherein the first horizontal folding lines (31I and 31II respectively) of the long side walls (30I and 30II respectively) are arranged so that they can be displaced vertically between a height h1′ and h1″, and a height h2′ and h2″ respectively, above the load surface (21) while the first and only horizontal folding lines (31III and 31IV respectively) of the short side walls (30III and 30IV respectively) are arranged on a height h3 and h4 respectively, above the load surface (21), whereby h1′<h2 and h2′<h3 and h3<h4 so that the short side walls (30III and 30IV respectively) are folded over the long side walls (30I and 30II respectively), that the vertical edges of the long side walls (30I and 30II respectively) are provided with gripping means (37) intended to engage corresponding means (38), placed on the flanges (36) of the short side walls (30III and 30IV respectively) becomes mechanically locked to the short side walls (30III and 30IV respectively), preventing the long side walls (30I and 30II respectively) from folding inwards, unless lifted upwards.