Sheet Post-Processing Device Skew Correction via Paddle Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Sheet post-processing devices face challenges in binding sheet bundles accurately when they are supplied in a skewed state, as existing systems lack effective mechanisms for detecting and correcting skewness, leading to potential misalignment and damage during the binding process.
Innovation Solution
The integration of a skew detection unit and a paddle operation system, where the skew detection unit calculates the skew amount and the paddle unit adjusts its operation based on this measurement to align the sheet bundle correctly before binding, ensuring proper alignment and minimizing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the sheet is supplied in a skewed state to the processing tray, then the sheet bundle can be processed, but the binding accuracy deteriorates due to misalignment
Solution Approach 1:
The paddle performs preliminary skew correction actions before the binding process. By detecting the skew amount in advance and adjusting the paddle operation accordingly, the sheet is realigned to the correct position before the stapler binds it, ensuring binding accuracy even when sheets are supplied in a skewed state
Solution Approach 2:
The system uses skew detection feedback to control the paddle operation. The skew detection unit measures the actual skew amount of the supplied sheet, and this information is fed back to the control unit, which then adjusts the number of paddle operations to correct the skew, creating a closed-loop control system that ensures accurate binding
2Manufacturing precision
If a skew detection unit and paddle operation control system are added, then binding accuracy is improved, but device complexity increases
Solution Approach 1:
The paddle unit serves multiple functions: it conveys the sheet forward and simultaneously performs skew correction based on controlled operation次数. By making the existing paddle multi-functional rather than adding a separate correction mechanism, the system improves binding accuracy while minimizing the increase in device complexity
Solution Approach 2:
The skew detection and correction functions are merged into the existing sheet conveyance system. The paddle that already exists for sheet transport is also used for skew correction by controlling its operation次数, and the skew detection unit shares the same control system, reducing overall system complexity
3Manufacturing precision
If the paddle operation次数 is increased to correct skew, then alignment accuracy is improved, but processing time increases
Solution Approach 1:
The system performs only the necessary number of paddle operations to correct the detected skew amount, not a fixed excessive number. The control unit calculates the precise number of operations needed based on skew detection feedback, performing partial action sufficient for correction without unnecessary additional operations that would waste time
Data Source
AI summary
A sheet post-processing device is connected to a punch processing unit. The punch processing unit includes a skew detection unit and a punch unit. The skew detection unit detects a skew amount of a sheet. The punch unit forms punch holes at positions of the sheet according to the skew amount. The sheet post-processing device includes a processing tray, a paddle, a driver, and a control unit. The sheet of which the skew amount is detected by the skew detection unit is mounted on the processing tray. The paddle conveys the sheet on the processing tray by a paddle operation. The driver drives the paddle to perform the paddle operation. The control unit is configured to operate the driver to control a number of times the paddle operation is performed by the paddle based on the skew amount.