Load Centering Device for Material Handling Forks
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Solution Overview
Problem
Material handling vehicles face challenges in accurately centering loads on forks, leading to increased object detection field widths, nuisance stops, and out-of-specification placement due to load shifting, which affects productivity and operational efficiency.
Innovation Solution
The implementation of a load centering device with moveable arms and a hydraulic circuit that actuates to engage and center loads on the forks, using pressurized fluid and compliance springs to maintain a stable contact force, allowing for precise load positioning and secure handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the object detection field width is increased to cover the vehicle and load, then the vehicle can detect obstacles and objects, but the frequency of nuisance stops and false alarms increases
Solution Approach 1:
The load centering device performs preliminary action by centering the load on the forks before the vehicle begins its travel. This advance centering ensures that the load remains within a predictable detection field during operation, eliminating the need to over-expand the detection field width to accommodate potential load shifts. The system takes preventive action to maintain proper load positioning rather than reacting to detection issues after they arise.
2Manufacturing precision
If manual pallet clamps are used to secure the pallet on one end, then the pallet position is fixed at the clamped end, but the far end of the pallet remains free to shift laterally
Solution Approach 1:
The load centering device divides the pallet securing function into two independent segments: one clamp that secures the near end of the pallet and another clamp that secures the far end. By segmenting the securing mechanism to act on both ends of the pallet simultaneously, the system eliminates lateral shifting while maintaining position accuracy. Each segment independently contributes to the overall stability of the load.
3Extent of automation
If automated systems interface with each other, then operational automation is achieved, but tolerances accumulate causing out-of-specification placement
Solution Approach 1:
The load centering device implements self-service by automatically centering the load on the forks without requiring manual intervention or complex coordination between multiple automated systems. The device uses sensors to detect load position and automatically activates the centering mechanism, making the system self-correcting. This eliminates the accumulation of tolerances that would occur through multiple automated interface points by consolidating the centering function into a single self-managing device.
Data Source
AI summary
Load centering devices and methods for a material handling vehicle are provided. In particular, load centering devices and methods are provided that enable a load to be centered with respect to load carrying forks on a material handling vehicle when the load is raised and/or lowered by the forks.