Sheet Discharge Control Using Pressure Unit
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Solution Overview
Problem
The disturbance of sheet alignment occurs when a sheet bundle of succeeding sheets is discharged onto preceding sheets due to the weight of the succeeding sheets, causing the preceding sheets to be pushed out.
Innovation Solution
A sheet conveying apparatus is equipped with a pressure unit that presses the preceding sheets stacked on the stacking unit against the stacking tray when a sheet bundle of succeeding sheets is discharged, preventing the disturbance of sheet alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple succeeding sheets are superimposed and discharged together onto preceding sheets, then productivity is improved by reducing the number of discharge operations, but the weight of the succeeding sheets pushes out the preceding sheets causing disturbance of sheet alignment
Solution Approach 1:
The pressing member applies a pressing force to the preceding sheets in the opposite direction of the pushing force from the succeeding sheets. This counteracting force prevents the preceding sheets from being pushed out, maintaining alignment while allowing multiple sheets to be discharged together, thus resolving the contradiction between improved productivity and maintained alignment precision
2Manufacturing precision
If the alignment plate abuts on the sheet bundle for a longer time, then alignment of the sheet bundle is improved, but the discharge time is extended reducing productivity
Solution Approach 1:
The pressing member is positioned in advance to press the preceding sheets before the succeeding sheets are discharged. This preliminary action secures the preceding sheets in position, allowing the alignment plate to quickly align the sheet bundle without extended abutting time, thus improving both alignment quality and discharge speed
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively reduces the disturbance of sheet alignment by ensuring that the preceding sheets remain in place despite the discharge of a sheet bundle of succeeding sheets, maintaining the alignment of sheets on the stacking tray.
Implementation Method 1
A pressure unit 690 is provided, and the bundle pressing member 690 moves to a pressing position under the action of a bundle pressing motor M6, thereby pressing already-stacked sheets P1
Data Source
AI summary
Discharging a sheet bundle of a sheet N and a sheet N-1 on preceding sheets already stacked on a stacking tray can cause the already-stacked sheets to be pushed out by the front end of the succeeding sheets. By pressing already-stacked sheets with a bundle pressing member when a sheet bundle of succeeding sheets is discharged, it is possible to reduce the likelihood of the already-stacked sheets being pushed out. Employing the bundle pressing member reduces disturbance of sheet alignment that can occur when a sheet bundle is discharged on already-stacked sheets.