Lug Cart Stop Mechanism for Tool-Free Bin Retention

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Solution Overview

Problem

Lug carts face challenges with bins unintentionally falling off, requiring tools for securing, limited flexibility in bin positioning, and inefficiencies in space utilization, particularly in dynamic environments.

Innovation Solution

A tool-free stop mechanism with a locking rod and bracket that secures bins without tools, allowing easy engagement and disengagement, enhancing flexibility and safety, and optimizing space utilization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional tool-based securing mechanisms are used, then bins can be secured to the lug cart, but the process becomes time-consuming and requires additional labor or training

Engineering Contradiction:

Improvebin securing reliabilityVSAvoidloading and unloading speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The stop mechanism is designed to be automatically engaged by the bin itself during insertion, eliminating the need for manual tool-based securing operations. The bin's own movement triggers the engagement of the stop mechanism, making the system self-serving and removing the need for additional labor or training.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The stop mechanism is pre-positioned on the lug cart frame before bin insertion. This preliminary positioning allows the bin to simply slide into place and be automatically secured without requiring any securing actions during the loading process, thereby increasing productivity.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If bins are arranged vertically on the lug cart, then space utilization is optimized, but the risk of bins falling off increases during ship transit

Engineering Contradiction:

Improvespace utilization flexibilityVSAvoidbin retention safety

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The stop mechanism acts as an intermediary element between the bin and the lug cart frame. It provides a mechanical barrier that prevents bins from sliding off during vertical arrangement, especially during ship transit, while maintaining the space-efficient vertical configuration.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If tool-free stop mechanisms are implemented, then loading and unloading efficiency improves, but the mechanism complexity increases

Engineering Contradiction:

Improvebin loading and unloading speedVSAvoidstop mechanism structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The stop mechanism is segmented into separate components: the stop member, the locking rod, and the locking rod bracket. This segmentation allows each component to be simple in design while collectively providing the tool-free securing function, balancing complexity with productivity benefits.

Inventive Principle:

Principle #1Segmentation

4Reliability

If traditional securing hardware is used, then bins can be secured, but the risk of hardware loss or breakage increases

Engineering Contradiction:

Improvebin securing effectivenessVSAvoidhardware loss and breakage

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The stop mechanism uses simple, robust components that are less prone to loss or breakage compared to traditional securing hardware like bolts, nuts, or clips. The design prioritizes durability and ease of replacement, effectively reducing the harmful factors associated with hardware failure.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Data Source

PatentUS20260077793A1Lug Cart Bin Securing System with Tool-Free Stop Mechanisms

Publication Date: 2026.03.19 MILNES IAIN

AI summary

A method is disclosed for securing bins in a lug cart by providing a lug cart with a frame supported on wheels and horizontal rails on the frame for supporting bins; installing a stop mechanism on at least one end of the lug cart, the stop mechanism comprising a locking rod and at least one locking rod bracket; engaging the stop mechanism without tools to prevent bins from exiting the lug cart; and disengaging the stop mechanism without tools to allow removal of bins from the lug cart.