Cargo Container Door Closure Mechanism Using D-Shape Slots
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Solution Overview
Problem
Traditional cargo container closure systems, such as those using external hook and bracket systems or Velcro, are vulnerable to deformation during handling, leading to security and certification issues, and lack reliable protection against environmental elements.
Innovation Solution
A cargo container closure system featuring securement plates with heads and stems that engage with frame securement features, including D-shaped slots and cam buckles, providing secure and adjustable closure with additional protection from environmental elements through a composite sheet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional hook and bracket systems are used for securing cargo covers, then the closure system is simple to implement, but the hooks and brackets are vulnerable to deformation during handling, leading to security failures
Solution Approach 1:
The closure system is divided into separate functional components: frame securement features (D-shaped slots) fixed to the container frame, and securement plates with stems that engage with these slots. This segmentation allows each component to be optimized independently - the frame features provide structural anchor points while the securement plates provide the actual securing mechanism with controlled deformation characteristics.
Solution Approach 2:
The D-shaped slot geometry inherently provides cushioning against deformation by allowing controlled movement and absorption of impact forces. The elongated portion of the D-shaped slot accommodates stem movement while the head-receiving portion maintains secure engagement, preventing the kind of catastrophic deformation that occurs with rigid hooks and brackets.
2Ease of operation
If Velcro or similar materials are used for securing cargo covers, then the closure system is easy to operate, but the securement is not entirely secure and reliable
Solution Approach 1:
The stem acts as an intermediary element between the securement plate and the D-shaped slot. The stem engages with the elongated portion of the slot, providing a mechanical linkage that translates simple plate insertion into reliable securement. This intermediary mechanism maintains ease of operation while achieving the reliability needed for cargo security.
3Strength
If rigid securement systems are used to ensure strong closure, then the closure strength is high, but the system cannot accommodate movement and deformation during handling
Solution Approach 1:
The D-shaped slot geometry provides dynamic adaptability by allowing the stem to move within the elongated portion while maintaining secure engagement. This dynamic design enables the system to accommodate handling movements and deformations while maintaining closure strength, unlike rigid fixed-position securement systems.
Data Source
AI summary
Embodiments of the invention described herein thus provide systems and methods for improved securement of a cargo cover/flexible door to a cargo container. The systems generally provide securement using cooperating frame securement features positioned on the cargo container and securement plates positioned on door straps of the cargo cover.