Tiered Palletized Rack with Pneumatic Rollers for Railcar Loading
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Solution Overview
Problem
Conventional rail transportation methods lack efficiency in loading and unloading palletized freight, often causing damage due to confined spaces and inefficient use of space, especially in refrigerated railcars where perishable goods require specific temperature control and stacking limitations.
Innovation Solution
A tiered palletized rack system with a base tier and adjustable second tier, supported by pneumatically actuated rollers, allows for bulk loading and unloading of cargo without a forklift entering the railcar, optimizing space utilization and reducing damage through air-permeable mesh support and securement features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If palletized freight is loaded into boxcars using conventional forklift methods, then cargo can be transported, but the process is inefficient and causes damage due to confined space and manual handling
Solution Approach 1:
The system segments the loading process by introducing a transfer dock that separates the forklift operation from the railcar interior. The forklift loads pallets onto the transfer dock exterior, and a roller mechanism transports them into the railcar without forklift entry, dividing the operation into distinct zones to eliminate damage risks while maintaining efficiency
Solution Approach 2:
The transfer dock with its roller mechanism serves as an intermediary device between the forklift and the railcar. This mediator enables cargo transfer without direct forklift entry into the confined railcar space, resolving the contradiction by providing an efficient transfer path that avoids damage-causing manual handling
2Productivity
If refrigerated freight is loaded with forklifts placing pallets on the floor, then cargo can be transported, but space utilization is poor as the area above pallets remains unused
Solution Approach 1:
The system transitions from single-level floor loading to multi-level vertical stacking by incorporating adjustable platforms that can be positioned at different heights. This dimensional change allows pallets to be stacked vertically above the floor level, dramatically improving space utilization in refrigerated railcars without requiring complex loading equipment
Solution Approach 2:
The adjustable platforms provide dynamic adaptability, allowing the loading system to accommodate different cargo heights and configurations. The platforms can be raised or lowered as needed, enabling flexible vertical stacking arrangements that maximize space utilization while keeping the loading system relatively simple
3Productivity
If double stacking of palletized loads is performed manually or with forklifts, then space can be utilized, but cargo damage occurs through human error or equipment contact
Solution Approach 1:
The roller mechanism on the transfer dock acts as an intermediary that transports pallets into the railcar without forklifts entering the confined space. This eliminates forklift-related damage risks during the transfer process while maintaining efficient loading operations
Solution Approach 2:
The system enables self-service loading where pallets are positioned on the transfer dock and then automatically conveyed into the railcar via the roller mechanism. This reduces human error and equipment contact within the railcar, improving cargo integrity while maintaining loading efficiency
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
Enables efficient, damage-free transfer of palletized cargo between road and rail transport, maximizing railcar space, maintaining temperature control, and preventing cargo shifting, thus enhancing the loading and unloading process.
Implementation Method 1
a tiered rack having a base tier, a support framework extending upward from the base tier, and a second tier adjustably attached to the support framework above the first tier
Data Source
AI summary
A system, method, and apparatus for palletizing cargo on a rack for shipment are provided. The system generally includes a tiered rack having a base tier, a support framework extending from the base tier, and a second tier adjustably attached to the support framework. The system may further include a plurality of lower frame support members positioned longitudinally across the bottom of the base tier, and a plurality of pneumatically actuated rollers spaced to cooperatively engage the plurality of lower frame support members, the rollers being selectively extendable from a plurality of raised tracks positioned longitudinally along a floor of the railcar, where the rollers are configured to pneumatically extend past an upper surface of the track when actuated and allow for linear motion thereover.