Sheet Processing Apparatus Ejection Tray Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sheet processing apparatuses struggle with efficiently handling two-ply sheets with abnormal conditions, such as separation failures, and fail to effectively differentiate between successful and unsuccessful sheet processing operations.
Innovation Solution
A sheet processing apparatus comprising a sheet feeder, a sheet processing device, a sheet ejection device, a purge unit, a multifeed sensor, a sheet sensor, and circuitry that controls the operation based on detection of sheet conditions, allowing for appropriate handling of sheets with abnormal conditions by distinguishing between successful and unsuccessful processing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the sheet processing apparatus uses a single ejection tray for all sheets, then the device complexity is reduced, but sheets with separation failures cannot be properly handled and may cause jams
Solution Approach 1:
The ejection system is segmented into two distinct trays: a first ejection tray for successfully processed sheets and a second ejection tray (purge tray) for sheets with separation failures. This segmentation allows the system to handle different sheet conditions separately, preventing jams while maintaining reliable processing.
Solution Approach 2:
A determination unit acts as an intermediary between the sheet processing device and the ejection trays. This intermediary component analyzes sheet conditions and directs sheets to the appropriate tray, ensuring that failed sheets are separated from successful ones without increasing overall system complexity.
2Ease of operation
If the sheet processing apparatus ejects all sheets to the first ejection tray, then the ease of operation is improved, but sheets with separation failures remain in the processing path and may cause subsequent jams
Solution Approach 1:
The determination unit extracts sheets with separation failures from the main processing flow and directs them to a separate second ejection tray. This extraction removes the harmful element (failed sheets) from the processing path, preventing subsequent jams while maintaining simple operation for successful sheets.
Solution Approach 2:
The system converts the potentially harmful situation of failed sheets into a beneficial separation process. By identifying and routing failed sheets to a dedicated purge tray, the system transforms what would be a jamming hazard into an organized disposal mechanism that protects the main processing flow.
3Measurement precision
If the sheet processing apparatus uses multiple sensors and determination logic, then the measurement precision of sheet conditions is improved, but the device complexity increases
Solution Approach 1:
The determination unit is designed as a multi-functional component that can evaluate multiple sheet conditions (separation success, insertion success, abnormality flags) and make routing decisions. This universal component consolidates what would otherwise require multiple separate control systems, maintaining measurement precision while limiting complexity growth.
Data Source
AI summary
A sheet processing apparatus including a sheet feeder, a sheet processing device, a sheet ejection device, a purge unit, a multifeed sensor, a sheet sensor, and circuitry. The circuitry stops an operation of the sheet processing apparatus when the multifeed sensor has not detected multifeed of the sheet and the sheet sensor does not detect a trailing end of the sheet after a first set time from detection of a leading end of the sheet, stop the operation when the multifeed sensor has detected the multifeed and the sheet sensor does not detect the trailing end of the sheet after a second set time from the detection, and conveys the sheet toward the purge unit without stopping the operation when the multifeed sensor has detected the multifeed and the sheet sensor detects the trailing end of the sheet before the second set time elapses from the detection.