Dolly Cart Rail Lock System for Transport Securing
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Solution Overview
Problem
Dolly carts secured within vehicles, such as semi-trailer trucks, often become loose during transport due to inadequate securing methods, leading to potential damage to the vehicle and risk of accidents.
Innovation Solution
A dolly cart rail and lock system is implemented, featuring upper and lower rails attached to the vehicle platform, with pocket assemblies and lock assemblies that engage dolly carts to limit movement in both side-to-side and front-to-back directions, ensuring secure positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If straps and ratcheting tie-downs are used to secure dolly carts, then the securing method is simple and easy to implement, but the dolly carts become loose during transport due to inadequate securing
Solution Approach 1:
The patent introduces a rail system as an intermediary structure between the dolly carts and the vehicle floor. The rails provide a fixed guide path that mediates the positioning of dolly carts, while lockable pocket assemblies serve as intermediaries to secure the carts to the rails. This intermediary rail system transforms the inadequate direct strapping method into a multi-component securing arrangement that prevents cart movement during transport.
Solution Approach 2:
The securing system is segmented into multiple independent components: fixed rails, movable pocket assemblies, and lockable mechanisms. Each component performs a specific function - rails provide guidance, pockets provide engagement points, and locks provide securing. This segmentation allows the system to achieve reliable securing while maintaining ease of operation through modular, specialized components.
2Reliability
If a rail and lock system is implemented to securely prevent dolly cart movement, then securing reliability is improved, but the device complexity increases
Solution Approach 1:
The rail system serves multiple functions simultaneously: it provides structural support, defines cart positioning, guides cart movement during loading/unloading, and serves as the anchoring system for the pocket assemblies. This multi-functionality reduces the need for separate components for each function, thereby limiting the increase in overall system complexity while maintaining high securing reliability.
Solution Approach 2:
Instead of actively restraining dolly carts with complex mechanical devices, the system inverts the approach by providing a fixed rail infrastructure and using simple lockable pocket assemblies that passively engage with the carts. The complexity is inverted from active restraint mechanisms to a passive, fixed infrastructure with simple engagement points.
Data Source
AI summary
A dolly cart rail and lock system configured to secure one or more dolly carts within a vehicle is provided. The dolly cart rail and lock system includes a first upper rail connected to a platform of the vehicle. The first upper rail having a first end. A second upper rail opposes the first upper rail and is connected to the platform of the vehicle. The second upper rail has a first end. A bulkhead assembly connects the first end of the first upper rail and the first end of the second upper rail. A plurality of spaced apart pocket assemblies is attached to the first and second upper rails. At least one lock assembly is connected to the pocket assemblies and is configured to engage the dolly carts such as to limit movement of the dolly carts in a front-to-back direction.