Image Forming Apparatus Sheet Stacking Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sheet stacking apparatuses do not effectively manage the extraction of sheets when power is turned off, leading to unnecessary movement and time wastage, especially when sheets are not present, and fail to address the issue of sheets being left behind.
Innovation Solution
An image forming apparatus with a control unit that checks for remaining sheets before shutting down, issuing a warning and allowing users to extract sheets, and automatically moving trays down to facilitate extraction when power is turned back on, thus preventing sheets from being left behind.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the elevating tray is always moved down when power supply is turned off, then sheets can be extracted, but unnecessary time is required when there are no sheets in the apparatus
Solution Approach 1:
The control unit performs a preliminary check of the sheet presence state before executing the power-off sequence. Based on this advance information, it decides whether to move the elevating tray down, thereby avoiding unnecessary movements when no sheets are present.
Solution Approach 2:
The control unit receives feedback from the sheet presence detection mechanism and uses this information to control the elevating tray movement. The tray is moved down only when sheets are detected, creating a feedback-based control system that adapts to the actual state.
2Ease of operation
If the elevating tray is moved up when power supply is turned on, then the apparatus is ready for operation, but unnecessary operation occurs when sheets were not present
Solution Approach 1:
The control unit checks the sheet presence state before power-off and stores this information. When power is restored, it uses this pre-acquired information to determine whether tray movement is necessary, eliminating the need for routine upward movement when no sheets are present.
Solution Approach 2:
The control unit uses feedback from the sheet presence detection to control the elevating tray operation at power-on. The tray moves up only when sheets are present, creating an efficient operation cycle that responds to actual conditions.
3Productivity
If power supply is turned off without checking sheet presence, then shutdown is quick, but sheets may be left in the apparatus
Solution Approach 1:
The control unit performs a preliminary check of sheet presence before initiating the power-off sequence. This advance check ensures that sheets are properly positioned for extraction, preventing them from being left in the apparatus while maintaining a quick shutdown process.
Solution Approach 2:
The control unit receives feedback from the sheet presence detection mechanism and uses this information to control the power-off sequence. Sheets are only left in the apparatus when no sheets are present, as the control unit skips the tray movement in such cases.
Data Source
AI summary
An image forming apparatus which performs image forming processing on sheets and outputs the sheets to a sheet stacking unit includes an instruction unit configured to issue an instruction for shutting down the image forming apparatus, an acquisition unit configured to acquire a remaining amount of sheets stacked in the sheet stacking unit, and a control unit configured to display, when the instruction unit receives the instruction, a warning indicating a shift to a state in which sheets are not extractable from the sheet stacking unit, based on the remaining amount of sheets acquired by the acquisition unit.