Sheet Material Receiver Oscillating Rotary Motion Singularization
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Solution Overview
Problem
Existing devices for singularizing sheet material, such as paper or currency notes, often fail to securely and reliably remove the topmost sheet from a stack without also removing lower sheets, due to inadequate engagement mechanisms.
Innovation Solution
A device with an actuator that sets a sheet-material receiver in an oscillating rotary motion about a parallel axis, combined with translatory motions, to initiate an attractive force and remove the topmost sheet from the stack, using electromechanical means and an elastic material for secure contact, without requiring a friction partner to prevent lower sheets from being removed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sheet-material receiver (roller or oscillating conveyor belt) is used to retrieve sheet material, then the device structure is simple, but the topmost sheet-material piece cannot be securely engaged and removed without also removing lower sheets
Solution Approach 1:
The actuator sets the sheet-material receiver in an oscillating rotary motion at a frequency greater than 1 kHz (preferably approximately 40 kHz). This high-frequency vibration enables the receiver to engage and remove the topmost sheet-material piece securely without causing lower sheets to be removed, resolving the reliability issue while maintaining manageable device complexity through controlled vibrational mechanics.
Solution Approach 2:
The sheet-material receiver is transformed from a static or simple oscillating component into a dynamically controlled element that performs oscillating rotary motion about a rotation axis parallel to the plumb-line direction. This dynamic behavior, controlled by the actuator, allows precise engagement of the topmost sheet while preventing engagement of lower sheets, thereby improving reliability without excessive complexity.
2Ease of operation
If the sheet-material receiver engages the lowermost sheet instead of the topmost sheet, then engagement is easier, but the singularization process becomes less reliable and may cause jamming
Solution Approach 1:
Instead of engaging the lowermost sheet as in conventional designs, the invention inverts the approach by engaging the topmost sheet-material piece of the stack. The actuator positions the sheet-material receiver above the stack and presses it onto the topmost sheet, then uses oscillating rotary motion to remove it. This inversion improves singularization reliability while maintaining ease of operation through the self-aligning nature of top-down engagement.
3Reliability
If a friction partner is added to prevent lower sheets from being removed, then singularization reliability improves, but device complexity increases
Solution Approach 1:
The invention extracts and removes the need for a separate friction partner component by integrating the lower-sheet-prevention function directly into the oscillating rotary motion mechanism of the sheet-material receiver. The high-frequency oscillation (greater than 1 kHz) creates sufficient dynamic separation between the topmost sheet and lower sheets, preventing unwanted engagement without requiring additional friction-based components, thus maintaining reliability while minimizing device complexity.
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 secure and reliable singularization of sheet material, specifically the topmost sheet, without concurrently removing lower sheets, using few components and maintaining minimal imbalance during operation.
Implementation Method 1
The actuator is configured for setting the sheet-material receiver in an oscillating rotary motion about a rotation axis that lies substantially parallel with the plumb-line direction, so as to receive the individual sheet-material piece from the sheet-material stack
Data Source
AI summary
A device for separating sheet material has an actuator and a sheet material holder coupled thereto. The actuator is designed for moving the sheet material holder. The sheet material holder is designed for receiving an individual sheet material piece from a sheet material stack in which the sheet material pieces are arranged in a layered manner one above another along a vertical direction. The actuator is designed to set the sheet material holder into an oscillating rotational movement about a rotation axis that lies substantially parallel to the vertical direction, in order to receive the individual sheet material piece from the sheet material stack.