Pallet container

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 19/10 (2006.01) B65D 77/06 (2006.01)

Patent

CA 2523359

The invention relates to a pallet container (10) comprising: a thin-walled inner container (12) made of thermoplastic material for storing and transporting liquid or free-flowing products; a lattice tube frame (14), which closely surrounds the plastic container (12) in the form of a supporting cage and which consists of vertical and horizontal tubular rods (20, 22) that are welded to one another, and; a base pallet (16) upon which the plastic container (12) rests and to which the lattice tube frame (14) is joined in a fixed manner. Prior art pallet containers have shortcomings with regard to strength (tubular rod fatigue failure) that are considerable in the event of longer lasting shaking during transport that involves dynamic cyclic stresses. In order to improve the lattice tube frame durability while maintaining sufficient stacking load-bearing capacity, the invention achieves an adapted optimal elasticity for dynamic alternating loads. This is realized by virtue of the fact that the tubular rods (20, 22) with a closed tubular profile have a varying tubular profile height, which is discontinuously higher in the intersection areas and continuously lower between the intersection areas.

L'invention concerne un conteneur palette (10) comportant un contenant interne (12) à parois minces en thermoplastique destiné au stockage et au transport de matières liquides ou fluides, un châssis tubulaire en treillis (14) entourant étroitement le contenant en plastique (12) et formant pour celui-ci une structure de support, ce châssis étant constitué de baguettes tubulaires (20, 22) verticales et horizontales soudées les unes aux autres, ainsi qu'une palette de fond (16) sur laquelle repose le contenant en plastique (12) et à laquelle le châssis tubulaire en treillis (14) est relié de manière fixe. Les conteneurs palettes connus présentent, lorsqu'ils sont soumis lors du transport à des secousses persistantes prolongées avec des contraintes de vibrations alternées dynamiques, des problèmes de résistance considérables (rupture de fatigue des baguettes tubulaires). L'objectif de l'invention est de permettre l'obtention d'une élasticité optimale adaptée pour des contraintes alternées dynamiques en vue d'améliorer la durabilité du châssis en treillis tout en conservant une capacité de charge de gerbage suffisante. A cet effet, les baguettes tubulaires (20, 22) constituées de profilés tubulaires fermés présentent une hauteur de profilé variable, cette hauteur étant accrue de façon variable dans les zones d'intersection et réduite de façon continue entre celles-ci.

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