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BR-112022006301-B1 - Pallet container for storing and transporting fluid or flowable filling materials.

BR112022006301B1BR 112022006301 B1BR112022006301 B1BR 112022006301B1BR-112022006301-B1

Abstract

PALLET CONTAINER FOR STORING AND TRANSPORTING FLUID OR FLOWING FILLING MATERIALS. The present invention relates to a pallet container (10) for storing and transporting liquid or fluidizing filling materials, having an inner thin-walled rigid plastic container (12) made of thermoplastic, having a tubular truss structure (14) that firmly encloses the inner plastic container (12) as a supporting liner and which is made of horizontal and vertical tubular rods (18, 20) welded together, and having a base pallet (16) on which the inner plastic container (12) rests and to which the tubular truss structure (14) is firmly connected, wherein at least two crossbeams (22) in the form of rods are provided above the inner plastic container (12), and two ends of which are fixed to two opposite side walls in the upper region of the tubular truss structure (14). In order to protect the upper region of the tubular truss structure (14) against an adverse effect of impact stresses and transport vibrations, according to the invention, the crossbeams (22) are designed as resilient spring elements (24).

Inventors

  • Sebastian Bischoff
  • Markus Meyer
  • Klaus-Peter Schmidt

Assignees

  • MAUSER-WERKE GMBH

Dates

Publication Date
20260317
Application Date
20201016
Priority Date
20191018

Claims (17)

  1. 1. Pallet container (10) for storing and transporting fluid or flowable filling materials having a thin-walled rigid plastic inner container (12) made of thermoplastic material, having a tubular grid structure (14) that firmly surrounds the plastic inner container (12) as a support cover and comprising horizontal and vertical tubular rods (18, 20) that are welded together and having a base pallet (16) on which the plastic inner container (12) is positioned and to which the tubular grid structure (14) is securely connected, wherein two transverse rod-shaped cross members (22) are provided above the plastic inner container (12) and are fixed at their two ends to two mutually opposite side walls in the upper region of the tubular grid structure (14), characterized in that the two rod-like transverse cross members (22, 42) are constructed as resilient elastic elements (24) by the two transverse cross members (22, 24) not being formed in such a way as to extend in a linear manner, but instead one or more curved portions.
  2. 2. Pallet container (10), according to claim 1, characterized in that the length of the transverse cross members (22, 42) between its two fixing locations (26, 28) is constructed to be greater than the direct spacing of the two fixing locations (26, 28) of the transverse cross members (22, 42) at its ends in the upper region of the tubular grid structure (14).
  3. 3. Pallet container (10), according to any one of claims 1 or 2, characterized in that the transverse cross members (22) are constructed not to be linear between their two attachment points (26, 28), but instead curved, and have a comparatively large curve (34).
  4. 4. Pallet container (10), according to any one of claims 1, 2 or 3, characterized in that the transverse cross members (22) - when viewed in the fitted state - are bent in the horizontal plane, wherein the large curves (34) are directed, in each case, outwards towards the two opposite shorter side walls of the tubular grid structure (14), wherein the transverse cross members (22), curved in an arched manner, are positioned flattened on the upper base (38) of the inner plastic container (12) and the large curves (34) of the two transverse cross members (22) are oriented so as to be directed away from each other.
  5. 5. Pallet container (10), according to any one of claims 1, 2, 3 or 4, characterized in that the length of the transverse cross members (22) is constructed between its two fixing locations (26, 28) between 1% and 5%, preferably 3%, greater than the direct spacing between the two fixing locations (26, 28).
  6. 6. Pallet container (10), according to any one of claims 1, 2, 3, 4 or 5, characterized in that the spacing of the two fixing locations (26, 28) for standard pallet containers having a filling volume of 600, 1000 or 1200 liters is approximately 960 mm and the effective length of the transverse cross members (22) is approximately 993 mm.
  7. 7. Pallet container (10), according to any one of claims 1, 2, 3, 4, 5 or 6, characterized in that the curved transverse cross members (22) for standard pallet containers having a filling volume of 600, 1000 or 1200 liters have a large radius of curvature between 300 mm and 700 mm, preferably 500 mm.
  8. 8. Pallet container (10), according to any one of the preceding claims 1 to 7, characterized in that the two ends of the transverse cross members (22, 42) are strongly compressed and an internal thread (46) is formed directly in the compressed portions (32) and the two ends of the transverse cross members (22, 42) are securely bolted on the front side to an upper horizontal or vertical tubular rod (18) of the tubular grid structure (14).
  9. 9. Pallet container (10), according to any one of the preceding claims 1 to 8, characterized in that a threaded nut (30) having an internal thread (44) is inserted into the end face at both ends of the transverse cross members (22, 42) and is securely screwed onto the end face to a horizontal or vertical tubular rod (18) upper of the tubular grid structure (14).
  10. 10. Pallet container (10), according to any one of the preceding claims 1 to 9, characterized in that the two ends of the transverse cross members (22, 42) are bolted in each case on the front side to the upper region of two adjacent vertical tubular rods (20).
  11. 11. Pallet container (10), according to any one of claims 1, 2, 5 or 6, characterized in that the transverse cross members with two curves (42) are constructed not to be linear between their two attachment points (26, 28) and instead have at their two ends a small - when viewed in the fitted state - downward curve (36) formed having a comparatively small radius and are, in each case, bolted at the lower front end against the uppermost circumferential horizontal tubular rod (18).
  12. 12. Pallet container (10), according to any one of the preceding claims 1 to 11, characterized in that the transverse cross members (22, 42) have a round tubular profile with a diameter between 16 mm and 24 mm, preferably 20 mm, and a wall thickness between 0.8 mm and 1.2 mm, preferably 0.9 mm.
  13. 13. Pallet container (10), according to any one of the preceding claims 1 to 12, characterized in that the transverse cross members (22, 42) have a square tubular profile with a side length between 14 mm and 20 mm, preferably 16 mm, and a wall thickness between 0.8 mm and 1.2 mm, preferably 0.9 mm.
  14. 14. Pallet container (10), according to any one of the preceding claims 1 to 2, 5, 6, 8 to 9 and 12, characterized in that the transverse cross members (22) are constructed as resilient elastic elements having two or three smaller curves that are oriented in a horizontal plane with smaller radii in comparison.
  15. 15. Pallet container (10), according to any one of the preceding claims 1 to 2, 5, 6, 8 to 10, 12 and 14, characterized in that the transverse cross members (42) are constructed as resilient elastic elements having two smaller curves that are oriented in a vertical plane and that have smaller radii in comparison and two or three smaller curves that are oriented in the horizontal plane and that have smaller radii in comparison.
  16. 16. Pallet container (10), according to any one of the preceding claims 1 to 15, characterized in that the curved transverse cross members (22, 42) in an arched manner - in the fitted state - are guided in each case through a retaining shoulder (40) which is formed from the upper base (38) of the inner plastic container (12) and the retaining shoulders (40) are disposed in the center of the curved transverse cross members (22, 42) in an arched manner.
  17. 17. Pallet container (10), according to any one of the preceding claims 1 to 15, characterized in that the arched curved transverse cross members (22, 42) - in the fitted state - are guided in each case below a hook protrusion (50) which is formed from the upper base (38) of the inner plastic container (12) and the hook protrusions (50) are disposed in the center of the arched curved transverse cross members (22, 42).

Description

[001] The present invention relates to a pallet container for storing and transporting fluid or flowable filling materials, having a rigid thin-walled inner container made of thermoplastic plastic material, having a tubular grid structure that firmly surrounds the plastic inner container as a support cover and comprising horizontal and vertical tubular rods that are welded together and having a base pallet on which the plastic inner container is positioned and to which the tubular grid structure is securely connected, wherein two transverse cross members in the form of rods are provided above the plastic inner container and are fixed with their two ends to two mutually opposite side walls in the upper region of the tubular grid structure. The rod-like transverse cross members are intended to prevent excessive bulging of the inner plastic container or its upper base with a central screw cap, particularly in the case of transport impacts and dynamic vibrations, and also serve, among other things, in the case of an undesirable tipping of the pallet container, to retain the inner plastic container in the tubular grid structure on the base pallet and to prevent it from sliding out of the tubular grid structure. In order to allow for easy replacement of the inner plastic container for multiple uses of the pallet container, the transverse cross members are loosely attached with their two ends to the upper region of the tubular grid structure, usually bolted. Such a pallet container having two parallel extending transverse cross members is known, for example, from publication WO 2012085940 A2. In a pallet container described in publication DE 4425630 A1, exactly four transverse cross members are provided, wherein two transverse cross members, which intersect obliquely with each other, cover one half of the inner plastic container, respectively. Problem: [002] When pallet containers are intended to be used for storing and transporting hazardous liquid filling materials, such as, for example, aggressive chemicals, these pallet containers then require a so-called dangerous goods approval from a national official inspection body; in Germany, this is the BAM (Federal Institute for Research and Testing of Materials). In order to obtain such dangerous goods approval, the various types of pallet containers are subjected to a specific type-of-construction test with various loading states, such as, for example, an internal pressure test, a drop test, and a vibration test. During the vibration test, significant transport loads (impacts, shocks) are simulated on a filled pallet container. In this case, the liquid column in the inner plastic container may be subjected to significant dynamic vibrations. These vibrations cause strong alternating loads on the side walls of the inner plastic container and are transmitted directly to the tubular grid structure that tightly surrounds the inner plastic container as a supporting cover. Since a pallet container typically has two longer and two shorter side walls, the two longer opposite side walls are generally subjected to higher loads and are therefore stabilized by the transverse cross members. The top base of the inner plastic container also undergoes significant dynamic upward and downward vibrations that act on the transverse cross members. In the case of a bulging of the top base in an upward direction, the known straight transverse cross members extending parallel to each other are pressed upward, and significant tensile loads act on the two attachment points of the transverse cross members on the tubular grid structure between the mutually opposite side walls of the tubular grid structure, whereby the upper region of the tubular grid structure is pulled inward. When the top base is lowered, the opposite side walls of the inner plastic container and the tubular grid structure spring outward, whereby the upper region of the tubular grid structure is also pressed outward. In this case, the transverse cross members with their two attachment points are again subjected to a significant tensile load. This alternating load is repeated at high frequency over a relatively long period of time and has a wear effect on the corresponding components of a pallet container. Objective: [003] One objective of the present invention is to reduce these disadvantageous tensile stresses and absorb the effect of tensile loads on the attachment points of the transverse cross members and, consequently, on the upper region of the tubular grid structure and mitigate stress peaks. Solution: [004] The intended reduction of disadvantageous tensile stresses is achieved whereby the two rod-like transverse cross members are constructed as resilient spring elements. As a result of the resilient construction of the two transverse cross members as spring elements, the rigid connection of previously conventional transverse cross members extending in a straight linear fashion to the opposite side walls of the tubular