Shipping Container Tuck Flap Structure for Stack Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing shipping containers face challenges in being easily erected and collapsed while maintaining structural integrity, as interlocking flap structures can be time-consuming to fold and secure, and may lead to deformation, nesting, sagging, or collapse when stacked.
Innovation Solution
A shipping container design featuring a blank with upper flaps and panels connected by vertical fold lines, including a tuck flap structure with gusset fold lines and locking tabs, allowing for secure engagement without adhesives or tape, facilitating easy assembly and disassembly while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If interlocking flap structures with locking features are used to secure the container, then the container provides structural stability when stacked, but the structure weakens the container and results in deformation including nesting, sagging, and collapse
Solution Approach 1:
The container is divided into separate panels connected by fold lines, allowing the structure to be segmented into manageable sections that can be erected and collapsed independently. The panels are connected through hinge relationships rather than rigid interlocking, maintaining structural integrity while enabling flexibility.
Solution Approach 2:
The container employs dynamic fold lines and hinge connections that allow the structure to transition between flat and three-dimensional states. The fold lines are positioned to allow panels to pivot and lock into place during erection, providing stability when needed while maintaining the ability to collapse for storage or return.
2Reliability
If traditional top flap closure with interlocking flaps is used, then the container can be secured, but it is time consuming to fold and secure
Solution Approach 1:
The container panels and flaps are pre-configured with fold lines and hinge connections that automatically align during the erection process. The geometry of the panels is designed so that when the container is assembled, the closures naturally engage without requiring manual manipulation or complex interlocking operations.
Solution Approach 2:
The container structure is designed to self-secure through its geometric configuration. When the panels are erected into their three-dimensional form, the flaps and closures automatically engage and lock into place through the predetermined fold line relationships, eliminating the need for separate securing operations.
3Ease of operation
If die cut locking slots are provided in top flaps for interlocking, then the flaps can be secured, but the locking features weaken the container structure
Solution Approach 1:
The closure and locking functions are merged into the overall panel structure through the fold line connections. Rather than adding separate locking slots that would weaken the material, the structural integrity of the panels themselves provides the locking mechanism through their geometric relationships and hinge connections.
Solution Approach 2:
The mechanical interlocking system with locking slots is replaced by a hinge-based folding mechanism. The fold lines create natural pivot points that allow the flaps to secure themselves through geometric constraint rather than mechanical fasteners, preserving the strength of the container walls.
Data Source
AI summary
A shipping container comprising first and second side panels, and first and second end panels connecting the first and second side panels. A pair of major upper flaps are foldably connected to respective side panels, the major upper flaps each forming half of a top panel. A pair of minor upper flaps are foldably connected to respective end panels, each of the minor upper flaps including a central tuck flap panel and a pair of gusset panels foldably connected to and overlapping the central tuck flap panel to form a tuck flap structure. Each tuck flap structure extending along an outer side of a respective end panel and including an end portion extending into an access port formed on the respective end panel.