Sheet Processing Apparatus Protrusible Tray Control
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Solution Overview
Problem
Existing sheet processing apparatuses face challenges in maintaining sheet alignment during discharge while minimizing collision sounds between the pressing member and the protrusible tray, which often interfere with each other.
Innovation Solution
A sheet processing apparatus that includes a pressing member and a protrusible tray, where the control unit coordinates their movements to ensure the protrusible tray reaches the position of the pressing member after the sheet bundle has abutted with it, thereby supporting the sheet bundle from below and reducing collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a pressing member is arranged to overlap the discharge direction of the sheet bundle to press down the sheet, then sheet alignment is improved, but the pressing member and protrusible tray will interfere or collide with each other
Solution Approach 1:
The protrusible tray is designed to dynamically adjust its position based on the discharge progress of the sheet bundle. The control unit monitors the discharge process and commands the protrusible tray to protrude only when necessary (when the sheet bundle has discharged a predetermined distance), and to retract when the sheet bundle approaches the pressing member. This dynamic positioning prevents collision between the protrusible tray and pressing member while maintaining sheet alignment during the discharge process.
2Stability of the object's composition
If the protrusible tray protrudes to support the sheet bundle from below, then sheet alignment is maintained, but the tray may collide with the pressing member
Solution Approach 1:
The control unit continuously monitors the discharge progress of the sheet bundle and adjusts the protrusible tray's position accordingly. When the sheet bundle has discharged a predetermined distance, the control unit commands the protrusible tray to protrude to support the sheet bundle from below. When the sheet bundle approaches the pressing member (within a predetermined distance), the control unit commands the protrusible tray to retract, preventing collision. This feedback-based control ensures both sheet bundle stability and collision prevention.
Data Source
AI summary
A sheet processing apparatus includes a discharge unit, a loading unit, an abutting unit, a support unit, and a control unit. The discharge unit discharges, from a discharge port, a sheet bundle transported along a transport path. The loading unit is loaded by the sheet bundle being discharged onto the loading unit. The abutting unit is disposed forward from the discharge port in a discharge direction of the sheet bundle so that the abutting unit abuts with a top surface of the discharged sheet bundle. The support unit is protrusible from and retractable into the discharge port and protrudes to an underside of the sheet bundle temporarily to support the sheet bundle when the sheet bundle is discharged. The control unit controls movement of the support unit such that the support unit reaches a position of the abutting unit after the sheet bundle abuts with the abutting unit.