Dynamic Sheet Alignment Control for Stapling Apparatus
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Solution Overview
Problem
Conventional sheet aligning devices struggle to effectively align sheets during staple processing, as they can only perform one type of alignment operation, leading to inadequate alignment with either few or many sheets, and increasing force causes bending or disorder.
Innovation Solution
A sheet post-processing apparatus with a control unit that adjusts the number of aligning operations and driving amount of both vertical and horizontal aligning devices based on the number of sheets, increasing operations when the sheet count exceeds a predetermined number to ensure proper alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the force for moving the aligning plates is increased, then the alignment capability for many sheets is improved, but the sheets bend and alignment becomes disordered when there are few sheets
Solution Approach 1:
The aligning device transitions from a static single-force setting to a dynamic multi-stage force application system. The control unit adjusts the driving amount of aligning plates in multiple stages based on sheet count detection, applying stronger forces when many sheets are detected and weaker forces when few sheets are present, thereby adapting the alignment capability to different operational conditions without causing sheet damage
Solution Approach 2:
The system changes the operational parameters (driving amount and number of aligning operations) based on the detected sheet count. When the sheet count exceeds a predetermined threshold, the control unit increases both the driving amount of the aligning plates and the number of aligning operations performed, optimizing alignment effectiveness for different sheet volumes
2Device complexity
If only one kind of setting for aligning operation is provided, then the device complexity is reduced, but the alignment performance is insufficient for both few and many sheets
Solution Approach 1:
The system implements feedback control by detecting the sheet count and using this information to automatically adjust the aligning operation parameters. The detection unit provides feedback about the number of sheets, and the control unit responds by selecting appropriate driving amounts and numbers of operations, eliminating the need for manual setting changes while maintaining high alignment performance across different sheet volumes
Solution Approach 2:
The aligning device achieves multi-functionality by performing multiple types of aligning operations with different driving amounts and operation counts within a single device. The control unit selects from multiple pre-programmed operation modes based on sheet count, allowing the same hardware to effectively handle both few-sheet and many-sheet alignment scenarios without requiring separate devices or complex manual reconfiguration
3Manufacturing precision
If the number of aligning operations is increased for many sheets, then the alignment quality is improved, but the processing time increases
Solution Approach 1:
The system dynamically adjusts the number of aligning operations based on real-time sheet count detection. Rather than performing a fixed number of operations for all sheet volumes, the control unit increases operations only when necessary (when sheet count exceeds threshold) and reduces operations when sheet count is low, optimizing the balance between alignment quality and processing time for different operational conditions
Data Source
AI summary
A sheet post-processing apparatus includes a sheet aligning device that increases, when the number of sheets conveyed thereto exceeds a predetermined number, the number of times of an aligning operation of the sheet aligning device, which aligns the sheets conveyed thereto, to be larger than the number of times of the aligning operation at the number of sheets equal to or smaller than this predetermined number.