Single-Sheet Lifter Counterbalance for Damage-Free Workpiece Separation
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Solution Overview
Problem
Existing air separators used in loading areas risk damaging workpieces due to the weight of their separation units and potential deformation of non-rigid workpieces during lifting, and struggle to stably lift the uppermost workpiece without causing impact or deformation.
Innovation Solution
A single-sheet lifter with a vertically extending base frame and a separation unit that moves up and down, utilizing air injection pressure and suction force for separation, along with a counter balancer to reduce weight and an assist unit for controlled falling, and a contact roller for lifting the workpiece edge as a fulcrum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an air separator is used to separate the uppermost workpiece, then the separation capability is improved, but the weight of the separation unit increases causing impact damage to workpieces
Solution Approach 1:
A counterbalancing mechanism is introduced to offset the weight of the separation unit. The counterbalance reduces the effective weight acting on the separation unit during operation, thereby minimizing impact forces on workpieces while preserving the separation capability provided by the air injection system.
2Reliability
If air injection pressure is increased to separate non-magnetic workpieces, then separation effectiveness is improved, but workpiece deformation occurs
Solution Approach 1:
The air injection system is designed to apply air pressure locally at specific points (nozzles positioned near workpiece edges) rather than uniformly across the entire workpiece surface. This localized application achieves effective separation while concentrating forces in areas less critical to overall workpiece integrity, reducing deformation risk.
Solution Approach 2:
The system adjusts air injection parameters (pressure, flow rate, injection timing) to optimize separation effectiveness. By carefully controlling these parameters, the system achieves sufficient separation force for non-magnetic workpieces while keeping the pressure below thresholds that would cause plastic deformation, especially when combined with the counterbalancing mechanism.
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 solution enables stable lifting of the uppermost workpiece without damaging it, even for non-magnetic materials, by distributing weight effectively and preventing deformation, ensuring reliable operation and reduced impact during retraction.
Implementation Method 1
The uppermost workpiece is separated from other workpieces by the pressure of the air injected from the separation unit
Implementation Method 2
When the workpiece suction lifter of the loading machine sucks the surface of the uppermost workpiece to lift the workpiece
Implementation Method 3
a counter balancer configured to reduce a weight acting on the separation unit
Data Source
AI summary
A single-sheet lifter includes a base frame arranged in a vicinity of a loading area and extending vertically, a separation unit configured to separate an uppermost workpiece from a plurality of the workpieces loaded in the loading area by means of at least one of an injection pressure of air and a suction force, and a counter balancer configured to reduce a weight acting on the separation unit. The separation unit is provided to the base frame so as to be able to move up and down. The separation unit includes a contact member that comes into contact with a surface of the uppermost workpiece. The separation unit is configured to go up following a lifting operation of a workpiece suction lifter and be retracted from above the loading area when the workpiece suction lifter sucks the surface of the uppermost workpiece to lift the workpiece.