Sheet Discharging Tray Alignment Control
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Solution Overview
Problem
Existing sheet discharging tray devices in image forming systems face alignment deviation issues during tray shift operations, leading to reduced productivity due to the need for increased sheet distance between discharges to maintain alignment, which compromises efficiency.
Innovation Solution
A sheet discharging tray device with a controller that detects alignment deviations and adjusts the tray's movement and discharge status by reducing the tray shift speed or moving amount, increasing the distance between discharged sheets, and optionally suspending operations when deviations exceed a set limit, using sensors to ensure precise alignment and optimize productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If tray shift operation is performed to offset sheet loading position, then sheet stacking efficiency is improved, but sheet alignment deviation occurs
Solution Approach 1:
A sheet alignment detection section is provided to detect the alignment state of sheets on the sheet discharging tray. The controller receives detection results and automatically adjusts the tray shift amount or sheet discharge timing to correct alignment deviations, forming a closed-loop feedback system that maintains both productivity and alignment precision during continuous operation
Solution Approach 2:
The tray shift amount is made dynamically adjustable based on detected alignment conditions. The controller modifies the tray shift parameters in real-time according to the detection results, transitioning from fixed periodic tray shifting to adaptive dynamic tray shifting that responds to actual sheet alignment states
2Manufacturing precision
If tray shift speed is reduced to improve alignment, then sheet alignment is improved, but productivity decreases
Solution Approach 1:
The system performs periodic tray shift operations at optimized intervals rather than continuous slow movement. The controller timing section coordinates tray shifts to occur at specific intervals when sheets are discharged, using periodic acceleration and deceleration cycles that maintain alignment while preserving overall discharge throughput
Solution Approach 2:
The tray shift speed parameters are dynamically changed based on operational phase and alignment requirements. The controller adjusts speed profiles - using higher speeds during stable alignment periods and reducing speed only when alignment correction is needed, optimizing the balance between precision and productivity
3Manufacturing precision
If increased sheet distance is set to maintain alignment, then sheet alignment is improved, but discharge efficiency is reduced
Solution Approach 1:
The system performs preliminary tray position adjustments before sheet discharge sequences that require larger offsets. By proactively positioning the tray in advance based on the number of sheets to be discharged, the system prevents alignment issues from developing rather than correcting them afterward, maintaining both efficiency and alignment
Data Source
AI summary
A sheet discharging tray device includes: a discharging section from which a sheet is discharged; a discharging tray on which the sheet discharged from the discharging section is stacked sequentially; a tray drive section which drives the discharging tray in a tray shift direction that is perpendicular to a sheet discharging direction from the discharging section with reference to a sheet surface; a controller which conducts a tray shift operation that shifts a position of the discharging tray under a condition of the number of sheets stacked on the discharging tray, and a sheet detection section which detects an alignment deviation in the tray shift direction. The controller changes an operation status of the discharging tray when a tray shift operation is conducted and changes a discharging operation of a sheet to the discharging tray, based on a detected result of the sheet detection section.