Sheet Conveying Device Guide Body Speed Difference Jam Prevention
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Solution Overview
Problem
Conventional sheet conveying devices face issues with paper jams when handling low-rigidity or large-size sheets, as the leading end of the sheet is lifted or curled during conveyance, leading to potential paper jams, and existing solutions that use nipping members to prevent this increase the device's cost due to the need for an opening and closing mechanism.
Innovation Solution
A sheet conveying device incorporating a tray, a conveyor, and a guide body with a space that allows the sheet to be guided by differing conveying speeds, preventing paper jams without the need for a nipping member or opening and closing mechanism, utilizing a sheet holder with clips that nip the sheet with controlled force and speed to stack it reliably on the tray.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a roller or conveying belt pushes a low-rigidity sheet to convey it, then the sheet can be conveyed through the device, but the leading end of the sheet is lifted or curled causing paper jams
Solution Approach 1:
A guide body is introduced as an intermediary component between the conveying belt and the sheet. The guide body has a space that receives the leading end of the sheet, and through speed difference between the conveying belt and guide body, it guides the sheet to the tray while preventing the leading end from being lifted or curled, thus preventing paper jams without requiring complex nipping mechanisms
Solution Approach 2:
The invention utilizes speed difference as a controllable parameter. The conveying belt and guide body move at different speeds, creating a relative motion that allows the guide body to receive and guide the sheet's leading end effectively. This speed parameter control enables reliable sheet conveyance without additional mechanical complexity
2Reliability
If a nipping member with opening and closing mechanism is used to convey the sheet, then paper jams are prevented, but the device cost increases
Solution Approach 1:
The guide body serves as a mediator that replaces the need for active nipping members with opening and closing mechanisms. By using the space structure and speed difference, the guide body passively guides the sheet without requiring complex actuation mechanisms, thereby maintaining reliability while reducing device complexity and cost
Solution Approach 2:
The guide body utilizes the inherent speed difference between itself and the conveying belt to automatically guide the sheet. This self-service mechanism eliminates the need for additional actuators, sensors, and control systems that would be required for a nipping member with opening and closing functionality, simplifying the overall device structure
Data Source
AI summary
A sheet conveying device includes a tray, a conveyor, and a guide body. The tray is configured to stack a sheet. The conveyor is configured to convey the sheet to the tray. The guide body has a space, a height of the space being greater than a thickness of the sheet. The guide body is configured to guide the sheet conveyed by the conveyor, with a leading end of the sheet being inserted in the space. The guide body is configured to separate the sheet from the space, according to a difference of a sheet conveying speed of the conveyor and a moving speed of the guide body, and to stack the sheet on the tray.