Dynamic Backup Plate Control for Note Stacking Stability
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Solution Overview
Problem
Existing paper sheet processing apparatuses face issues with unstable stacking performance due to varying note quality and condition, leading to jamming, uneven stacks, and misalignment, especially when handling notes with damages like stains, bent corners, or peeled-off edges.
Innovation Solution
The apparatus incorporates a dynamic control system that adjusts the backup plate depth, width guide position, and impeller alignment based on real-time judgments of note quality and condition, ensuring optimal stacking by varying the backup plate descent, width guide alignment, and impeller positioning to accommodate notes of different sizes and damages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the backup plate is fixed at a certain descent distance, then the stacking structure is simple, but the stacking performance becomes unstable when handling notes of varying quality and condition
Solution Approach 1:
The backup plate's descent distance is made dynamically adjustable rather than fixed. The control unit varies the descent distance based on detected note characteristics (quality, condition, thickness), allowing the system to adapt to different note types and maintain stable stacking performance without requiring complex manual intervention for each note variation.
Solution Approach 2:
The system changes the physical parameter of backup plate position by adjusting its descent distance. By varying this parameter in response to note characteristics, the system optimizes stacking conditions for different note qualities and conditions, resolving the instability issue while maintaining reasonable device complexity through automated control.
2Reliability
If the width guide position is uniformly controlled, then the guide structure is simple, but notes with poor quality and condition get caught by the guide, causing stack errors
Solution Approach 1:
The width guide position is made dynamically adjustable based on detected note characteristics. For notes with poor quality or condition, the system adjusts the width guide position to prevent catching on damaged edges or corners, while maintaining uniform positioning for good quality notes. This dynamic adjustment prevents stack errors without requiring overly complex intervention mechanisms.
Solution Approach 2:
The system applies different width guide positioning strategies based on local note conditions. Rather than using a single uniform position for all notes, the width guide is selectively adjusted for specific notes with known defects, providing localized adaptation that improves stacking accuracy without universally increasing device complexity.
3Speed
If the position adjusting guide operates at high speed and large amplitude, then the alignment response is fast, but damaged notes with bent corners or peeled-off edges cannot be properly positioned
Solution Approach 1:
The position adjusting guide's operating parameters (speed and amplitude) are made dynamically adjustable based on note condition. For damaged notes with bent corners or peeled edges, the system reduces speed and adjusts amplitude to allow proper positioning without causing further damage or misalignment. For intact notes, higher speeds maintain efficiency. This dynamic control resolves the contradiction between speed and accuracy for different note types.
Solution Approach 2:
The system changes the operational parameters of the position adjusting guide based on detected note characteristics. By varying speed and amplitude parameters in response to note condition, the system optimizes positioning accuracy for damaged notes while maintaining fast operation for good quality notes, effectively resolving the speed-accuracy trade-off.
4Reliability
If the impeller is fixed in position, then the feeding mechanism is simple, but notes displaced from center or with asymmetrical damage drop or project from the impeller, degrading stacking performance
Solution Approach 1:
The impeller position is made dynamically adjustable rather than fixed. The control unit varies the impeller position based on note characteristics, particularly for notes with asymmetrical damage or displacement from center. This dynamic positioning ensures that the impeller can accommodate various note conditions without causing drops or projections, maintaining consistent stacking performance without requiring overly complex mechanical structures.
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
This approach stabilizes the stacking process by ensuring proper alignment and positioning of notes, preventing jams and misalignment, even with notes of uneven quality and condition, resulting in a consistent and efficient stacking performance.
Implementation Method 1
An impeller is provided in the note input side of the stacking box, to guide notes one by one to the stacking box
Data Source
Figure 1
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Figure 4~5
AI summary
A paper sheet processing apparatus has a take-in device which takes in notes set in a setting unit, a judgment device (41) which judges the quality and condition of a note taken in by the take-in device, a stacking box (28 - 33) which stacks the note judged the quality and condition by the judgment device, a backup (49) which is provided movably up and down in the stacking box (28 - 33) and stacks notes, and a control device (42) which variably controls the position of the backup (49) based on the result of judgment by the judgment device (41).