Sheet Feeding Device Blocking Suction Air for Safe Detachment
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Solution Overview
Problem
Existing sheet feeding devices in image forming apparatuses face challenges in safely detaching the sheet container after image formation, as they rely on a predetermined time for the sheet to peel off from the attraction belt, which can lead to potential damage and increased waiting time for the next operation.
Innovation Solution
A sheet feeding device incorporating a sheet loader, an air drawing body, an attracting and conveying device, an air duct, and a blocking device, where the air drawing body generates suction air to attract and convey sheets, and the blocking device shuts down the suction air after sheet conveyance, allowing for quicker separation and safer detachment of the sheet container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the air drawing fan is stopped to terminate air drawing operation, then the sheet container can be detached safely without causing damage to the sheet, but the sheet separation from the attraction belt takes a predetermined time which increases waiting time
Solution Approach 1:
The blocking device is activated in advance after sheet conveyance to block the air duct, preventing suction air from continuing to act on the sheet. This preliminary blocking action accelerates the sheet separation process while maintaining safe detachment conditions, thereby reducing waiting time without compromising reliability
Solution Approach 2:
The blocking device extracts or removes the suction air flow from the air duct after sheet conveyance is complete. By taking out the suction air, the system quickly releases the attraction force on the sheet, enabling rapid separation while ensuring safe detachment of the sheet container
2Reliability
If a predetermined time is used for sheet peeling, then the sheet container can be detached safely, but productivity is reduced due to extended waiting time
Solution Approach 1:
The blocking device performs a preliminary action by blocking the air duct immediately after sheet conveyance. This prevents continued suction air flow that would otherwise extend the separation time, thereby accelerating the process and improving productivity while maintaining safe detachment conditions
Solution Approach 2:
The blocking device extracts the suction air from the air duct, quickly removing the attraction force from the sheet. This extraction action significantly reduces the time required for sheet separation, thereby improving productivity without compromising the safety of sheet container detachment
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 configuration enables quicker separation of sheets from the attraction belt and safer detachment of the sheet container, reducing waiting time and preventing damage, while maintaining high productivity in sheet feeding operations.
Implementation Method 1
an air drawing body (61) that generates suction air
Data Source
AI summary
A sheet feeding device, which is included in an image forming apparatus and an image forming system, includes a sheet loader, an air drawing body, an attracting and conveying device, an air duct and a blocking device. The sheet loader is a device on which a bundle of sheets is loaded. The air drawing body is configured to generate suction air. The attracting and conveying device is configured to attract a sheet on top of the bundle of sheets by the suction air and convey the sheet. The air duct is configured to intake the suction air drawn by the air drawing body, to the attracting and conveying device. The blocking device is configured to block the suction air in the air duct.