Mobile Cargo Stop with Ratchet Chain for Trailer Securement
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Solution Overview
Problem
Current cargo securing systems in trailers fail to effectively immobilize wheeled carts under stringent Federal Motor Carrier Safety Administration (FMCSA) regulations, particularly in withstanding deceleration and acceleration forces, and are inefficient in loading and unloading processes.
Innovation Solution
A cargo securement system comprising a mobile cargo stop, a chain, and an anchoring mechanism that uses a turnbuckle and ratchet mechanism to securely wedge wheeled carts between the cargo stop and the trailer front wall, ensuring they are snugly restrained and capable of withstanding required forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cargo securing systems (tie down straps, chains, cross bars) are used, then cargo can be restrained, but they fail to effectively immobilize wheeled carts under FMCSA regulations and cannot withstand required deceleration and acceleration forces
Solution Approach 1:
The cargo stop is designed as a mobile device mounted on wheels or casters, allowing it to be easily positioned behind carts and moved into place. This dynamic positioning capability enables effective restraint of wheeled carts while meeting FMCSA force requirements through proper placement rather than relying solely on material strength
Solution Approach 2:
The chain acts as an intermediary element connecting the anchored front wall to the mobile cargo stop. By tensioning the chain between these two points, the system creates a rigid restraint mechanism that effectively immobilizes carts, transforming the flexible chain into a force-transmitting element that meets FMCSA requirements
2Reliability
If mobile cargo stop with chain and turnbuckle mechanism is used, then carts can be securely restrained against deceleration and acceleration forces, but the device complexity increases
Solution Approach 1:
The securement system is divided into distinct functional components: the mobile cargo stop (with frame, back stop, and cinching device), the chain, the anchoring mechanism, and the optional front wall liner. This segmentation allows each component to perform its specific function independently, making the overall system more manageable and easier to operate despite the added complexity
Solution Approach 2:
The turnbuckle and ratchet mechanism enable the operator to easily tension and lock the chain without requiring additional tools or complex adjustment procedures. The self-adjusting nature of these mechanisms simplifies operation, offsetting the increased device complexity through ease of use
3Reliability
If stricter cargo restraining rules are implemented, then cargo and worker safety is improved, but loading and unloading times increase
Solution Approach 1:
The mobile cargo stop on wheels or casters can be quickly positioned and repositioned, enabling fast setup during loading and rapid removal during unloading. This dynamic mobility significantly reduces the time required to implement and remove securement systems compared to fixed installations, while still meeting FMCSA safety requirements
Solution Approach 2:
The chain can be pre-anchored to the front wall before cargo arrival, and the mobile cargo stop can be positioned in advance. This preliminary preparation allows for rapid securement once carts are in place, reducing loading time while ensuring safety compliance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively secures wheeled carts up to 42,400 lbs, reducing loading and unloading times while ensuring compliance with FMCSA regulations by providing robust restraint against deceleration and acceleration forces.
Implementation Method 1
a two way or reversible ratchet mechanism for raising and lowering the turnbuckle hook
Implementation Method 2
The turnbuckle is threadably connected to both portions of the threaded rod and can be rotated to raise or lower the turnbuckle hook, thereby tightening or loosening the chain
Implementation Method 3
a pair of vertically aligned, threaded rods connected by a turnbuckle
Implementation Method 4
The turnbuckle hook 20 is suspended from the lower rod. The upper threaded rod is connected to the top of the frame. The turnbuckle is threadably connected to both portions of the threaded rod and can be rotated to raise or lower the turnbuckle hook
Implementation Method 5
The system works by wedging carts full of cargo between a the cargo stop and the trailer front wall by tightening the chain
Data Source
AI summary
A method and apparatus for restraining cargo in a trailer is provided. The apparatus has four components: a mobile cargo stop, a chain, means for anchoring the chain to the trailer floor near the trailer front wall, and a front wall liner mounted to the trailer front wall. The chain runs from the anchoring means near the trailer front wall, under the cargo, and is affixed to the cargo stop with a turnbuckle hook. The cargo is restrained between the front wall liner and the cargo stop by tightening the chain using a cinching device mounted on the cargo stop.