Transport Container Stacking Frame Roller Integration
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Solution Overview
Problem
Existing transport containers face issues with roller durability due to alternating loads and protrusion, which compromises their stackability and interior usability, and the telescopic handle's stability under peak loads, limiting their load capacity and safety when stacked.
Innovation Solution
A stacking frame integrated into the container's underside, flush with the bottom, houses rollers and telescopic handles, providing a stable and durable design that maintains a cuboid interior and enhances stackability with 45° inclined surfaces for ground clearance, and includes secondary rollers for increased clearance when needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If rollers are stored at the bottom corner of the transport container, then the interior of the container is free of storage facilities providing an essentially cuboid interior, but the rollers clearly protrude in relation to the otherwise cuboid external shape and are at risk of damage
Solution Approach 1:
The rollers are nested within recesses formed in the corner profiles of the container body. The recesses are designed to receive the rollers when retracted, protecting them from damage while maintaining the external cuboid shape. This nesting solution allows the rollers to be stored within the container's corner structures without protruding beyond the external dimensions.
2Reliability
If the roller bearing is designed to withstand alternating loads of up to 20 Hz and peak loads of several hundred kilograms, then the rollers and their bearing must be correspondingly stable, but this increases the complexity and weight of the roller bearing structure
Solution Approach 1:
The roller bearing structure is merged with the corner profiles of the container body. The corner profiles are designed to integrate the bearing mounts and roller support structures, eliminating the need for separate, complex roller bearing assemblies. This integration reduces overall structural complexity while maintaining the required load-bearing capacity through the reinforced corner profile design.
3Reliability
If the roller bearing and telescopic handle bearing are integrated into the container body, then the interior of the container body is fissured on the underside and universal usability is limited, but this provides stable support for the components
Solution Approach 1:
The corner profiles are designed with localized recesses and bearing mounts only where needed for roller and handle support. The rest of the container body maintains its smooth, uninterrupted underside, preserving the cuboid interior volume and universal usability. This localized integration approach provides stable component support while minimizing impact on the overall container functionality and appearance.
4Shape
If stacking corners protrude minimally in relation to the container body to ensure stackability, then stacking safety is limited and not guaranteed if more than three transport containers are stacked, but this maintains a compact external shape
Solution Approach 1:
The corner profiles are designed with asymmetric features including extended stacking surfaces and interlocking elements that protrude strategically to ensure stable stacking. The asymmetry allows for reliable stacking of multiple containers (more than three) by providing enhanced contact surfaces and mechanical interlocking, while the overall external shape remains compact through optimized profile design.
Data Source
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AI summary
The invention relates to a transport container, in particular made of light metal such as aluminium, with a container body (14) and a container lid (12) pivotably mounted thereon, with a plurality of rollers (58) on the container body (14) and a telescopic handle (64) spaced apart from the rollers (58), each on the side of the container body (14) opposite the container lid (12), wherein a stacking frame (50) is attached to or integrated into the cuboid container body (14), which container body (14) optionally has rounded corners, but is free of recesses or indentations (82) for rollers (58) and which stacking frame (50) forms at least three stacking guides (52, 54), in particular four stacking guides (52, 54) at the corners, and the rollers (58) are mounted in or on the stacking frame (50), in particular each roller (58) adjacent to a stacking element.and the telescopic handle (64) is integrated into the stacking frame (50).