Dynamic Sheet Stacking Apparatus Alignment Control
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Solution Overview
Problem
Existing sheet stacking apparatuses face challenges in aligning sheets of varying thicknesses and stiffnesses due to inadequate urging forces, leading to poor alignment and potential buckling or floating of sheets during the stacking process.
Innovation Solution
A sheet stacking apparatus with a conveyance unit, a stacking unit that lowers as the sheet stack increases, an abutment portion for the leading edge of the sheet, an urging unit to align the leading edge, and a control unit that adjusts the urging force based on sheet information to ensure proper alignment of sheets with different thicknesses and stiffnesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a large urging force is applied to align sheets with large thickness, then alignment is improved, but sheets with small thickness may buckle
Solution Approach 1:
The urging force is made dynamically adjustable based on sheet thickness. The control unit modifies the urging force magnitude according to detected sheet properties, transitioning from a static fixed force to a dynamic adaptive force that matches sheet requirements
Solution Approach 2:
The physical parameter of urging force is changed according to sheet thickness variations. The system detects sheet thickness and adjusts the urging force parameter accordingly, using different force magnitudes for different sheet types to achieve optimal alignment without damage
2Stability of the object's composition
If a small urging force is applied to prevent buckling of thin sheets, then sheet integrity is maintained, but alignment becomes poor for thick sheets
Solution Approach 1:
The urging force parameter is adjusted based on sheet thickness detection. For thick sheets, a larger urging force is applied to ensure proper alignment, while for thin sheets, a smaller urging force prevents buckling
Solution Approach 2:
The system transitions from a static urging force to a dynamic adaptive force that responds to real-time sheet properties, allowing optimal alignment precision and sheet integrity protection for varying sheet types
3Device complexity
If a fixed urging force is used for all sheet types, then device complexity is reduced, but alignment precision deteriorates for sheets with varying thickness
Solution Approach 1:
The system implements feedback control by detecting sheet thickness and using this information to adjust the urging force. The detection unit provides feedback about sheet properties to the control unit, which then modifies the urging force accordingly
Solution Approach 2:
The system automatically adjusts the urging force based on detected sheet properties without requiring manual intervention. The control unit self-regulates the urging force magnitude according to the detected sheet thickness, making the system adaptive and self-adjusting
Data Source
AI summary
A sheet stacking apparatus includes a conveyance unit configured to convey a sheet, a stacking unit on which the sheet conveyed by the conveyance unit is stacked, the stacking unit being configured to be lowered as an amount of the sheets stacked on the stacking unit increases, an abutment portion on which a leading edge of the sheet conveyed by the conveyance unit abuts, an urging unit configured to urge a leading edge portion, of the sheet, abutting on the abutment portion toward the stacking unit, and a control unit configured to adjust an urging force of the urging unit according to sheet information of the sheet conveyed toward the abutment portion.