Sheet Processing Apparatus Dynamic Cutting Position Adjustment
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Solution Overview
Problem
Conventional sheet processing apparatuses and image forming apparatuses face challenges in maintaining the flatness and uniformity of folded sheet bundles, particularly when deforming processing is applied to the spinal portion, leading to inconsistencies in cutting lengths and appearance issues when cutting the opened end portion.
Innovation Solution
A sheet processing apparatus that includes a deforming unit to correct the spinal portion and a cutting unit to adjust the cutting position based on the presence of deforming processing, ensuring consistent cutting lengths irrespective of deforming processing settings, by adjusting the distance from the spinal portion to the cutting position for bundles with the same thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If deforming processing is applied to the folded spinal portion to improve flatness, then the appearance and flatness of the folded sheet bundle is improved, but the distance from the folded spinal portion to the cutting position becomes inconsistent, leading to cutting length variations
Solution Approach 1:
The apparatus dynamically adjusts the cutting position based on whether deforming processing has been performed. The control unit modifies the distance from the folded spinal portion to the cutting position according to the deforming amount, ensuring consistent cutting lengths regardless of the deforming processing state.
Solution Approach 2:
The system changes the cutting position parameter based on the deforming amount. When deforming processing is applied, the cutting position is adjusted by a specific amount corresponding to the deforming amount, thereby maintaining consistent cutting lengths while preserving the flatness improvement.
2Device complexity
If the cutting position is fixed for all folded sheet bundles, then the apparatus structure is simple, but cutting length consistency cannot be maintained when deforming processing is applied
Solution Approach 1:
The cutting position is made dynamic rather than fixed. The control unit adjusts the cutting position based on the deforming amount, allowing the system to adapt to different processing states while maintaining consistent cutting lengths.
Solution Approach 2:
The control unit receives information about whether deforming processing has been performed and adjusts the cutting position accordingly. This feedback mechanism ensures that the cutting position is optimized based on the actual state of the folded sheet bundle.
3Manufacturing precision
If the cutting position is adjusted for each folded sheet bundle, then cutting length consistency is maintained, but the control system becomes more complex
Solution Approach 1:
The control unit modifies the cutting position parameter based on the deforming amount. By establishing a clear relationship between the deforming amount and the cutting position adjustment, the system achieves consistent cutting lengths with manageable control complexity.
Data Source
AI summary
A sheet processing apparatus that can process a folded sheet bundle, comprising: deforming processing means configured to perform deforming processing by deforming a folded spinal portion of the folded sheet bundle to form a substantially flat portion along the folded spinal portion; and cutting means configured to cut an edge portion, opposite to the folded spinal portion, of the folded sheet bundle, wherein the distance from the folded spinal portion of a folded sheet bundle to a position to be cut by the cutting means is shorter for a folded sheet bundle A having a particular thickness and having been subjected to the deforming processing than the distance from the folded spinal portion of the folded sheet bundle to a position to be cut by the cutting means for a folded sheet bundle B not subjected to the deforming processing but having the same thickness as folded sheet bundle A.