Sheet Post-Processing Apparatus Shift Mechanism Inclination Control
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Solution Overview
Problem
The existing sheet post-processing apparatuses face issues with sheet bundle inclination during discharge, leading to potential falling due to residual inertia and improper alignment, which results in unstable stacking on trays.
Innovation Solution
A sheet post-processing apparatus incorporating a binding mechanism, a shift mechanism that deviates the sheet bundle in the sheet width direction, and a control unit to divide the shift operation into multiple stages, thereby mitigating inertial forces and correcting inclination by controlled alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the sheet bundle is discharged quickly to improve productivity, then the discharge speed increases, but the sheet bundle inclination worsens due to residual inertia
Solution Approach 1:
The shift mechanism operates periodically during discharge, alternating between shifting the sheet bundle to the left and right at different time points. This periodic shifting action counteracts the continuous inertial force, preventing the sheet bundle from inclining in one direction while maintaining high discharge speed
Solution Approach 2:
The shift mechanism applies a preliminary counteracting force to the inertial inclination by shifting the sheet bundle in the opposite direction before the inclination becomes significant. This preliminary anti-action prevents the sheet bundle from falling while allowing rapid discharge
2Loss of time
If the shift operation is performed in a single stage to improve efficiency, then the discharge time is reduced, but the sheet bundle alignment precision worsens
Solution Approach 1:
The shift operation is segmented into multiple stages with different shift amounts. The first shift mechanism applies a larger shift amount initially, followed by the second shift mechanism applying a smaller adjustment. This segmentation achieves precise alignment while completing the operation within acceptable time limits
Solution Approach 2:
The shift mechanisms apply partial shifting actions in sequence rather than one excessive action. The first shift provides the majority of the correction, and the second shift provides fine-tuning, achieving precision without requiring excessive total time
Data Source
AI summary
A sheet post-processing apparatus including a binding mechanism, a tray, a shift mechanism, and a control unit is provided. The binding mechanism is configured to apply binding to a sheet. The sheet applied with the binding is stacked on the tray. The shift mechanism is configured to perform a shift operation in which a side surface of the sheet is pushed and the sheet is deviated in a sheet width direction orthogonal to a discharge direction during discharge of the sheet to the tray. The control unit is configured to cause the shift operation to be performed by dividing the number of times for the shift operation into a plurality of times.