Post-Processing Apparatus Aligning Unit Discharge Failure Detection
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Solution Overview
Problem
Image forming apparatuses face malfunctions due to failure in discharging sheet bundles after binding processes, which can cause the bundles to remain in the sheet loading unit, hindering the aligning unit's operation and potentially leading to driving unit breakdowns.
Innovation Solution
A post-processing apparatus with a detection processing unit that identifies discharge failures and a stop processing unit to halt the aligning operation when a failure is detected, preventing further damage and ensuring smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the aligning unit continues to operate after a discharge failure, then the aligning operation can maintain productivity, but the driving unit may break down due to the sheet bundle remaining in the sheet loading unit
Solution Approach 1:
The detection processing unit performs preliminary detection of discharge failure before the aligning unit operates on the retained sheet bundle. By detecting the discharge failure in advance and stopping the aligning operation, the system prevents the sheet bundle from interfering with subsequent aligning operations, thereby avoiding driving unit breakdown while maintaining productivity.
2Reliability
If the aligning unit stops operation when discharge failure is detected, then the driving unit is protected from breakdown, but productivity is reduced due to operation interruption
Solution Approach 1:
The detection processing unit provides feedback on the discharge status to the control unit. When a discharge failure is detected, the control unit stops the aligning operation to prevent damage. This feedback mechanism ensures the driving unit is protected while minimizing productivity loss by only stopping when necessary.
3Device complexity
If the sheet bundle remains in the sheet loading unit after discharge failure, then no additional processing is needed, but the aligning unit cannot perform subsequent aligning operations
Solution Approach 1:
The detection processing unit identifies and extracts the problematic sheet bundle from the normal processing flow by detecting the discharge failure. This allows the system to separate the failed sheet bundle from subsequent processing, enabling the aligning unit to continue operations on new sheets while the failed bundle remains undisturbed.
Data Source
AI summary
Provided are a post-processing apparatus, an image forming apparatus, and a post-processing method capable of avoiding the occurrence of a malfunction due to a failure to discharge a sheet bundle after a binding process. A plurality of sheets is loaded on a stack tray. A staple unit binds the plurality of sheets. A discharge roller discharges the sheet bundle bound by the staple unit from the stack tray. Each time a sheet is conveyed to the stack tray, an aligning unit moves between a first position in contact with the sheet loaded on the stack tray and a second position separating from the sheet. A detection processing unit detects a failure of discharging the sheet bundle by the discharging roller. A stop processing unit can stop the operation of the aligning unit when the discharge failure is detected by the detection processing unit.