Pivotable Upper Conveying Guide for Jam Removal
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Solution Overview
Problem
Existing sheet conveying devices in image forming systems face challenges in efficiently handling sheet jams within the conveying passage, particularly when the passage needs to be opened for removal, as the existing mechanisms often interfere with the sheet stack tray, limiting flexibility and ease of jam removal.
Innovation Solution
A sheet conveying device with a pivotable upper conveying guide and a movable part on the sheet stack tray that swings up to clear the conveying passage, allowing for wider opening and easier access to jams without interfering with the stack tray, enabling smooth operation and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the upper conveying guide is made pivotable to open the conveying passage for jam removal, then the ease of operation for jam removal is improved, but the sheet stack tray may be interfered with by the moving guide
Solution Approach 1:
The sheet stack tray is divided into a fixed part and a movable part. The movable part can swing between a sheet receiving position and a retracted position, allowing the upper conveying guide to open without interfering with the tray's sheet stacking function.
Solution Approach 2:
The movable part of the sheet stack tray is designed to dynamically change position. It swings to a retracted position when the upper conveying guide needs to open for jam removal, and returns to the sheet receiving position for normal operation, enabling both jam access and sheet stacking.
2Ease of repair
If the upper conveying guide swings widely to access jams, then the ease of repair is improved, but the interference with the sheet stack tray increases
Solution Approach 1:
Before the upper conveying guide swings open for jam removal, the movable part of the sheet stack tray automatically swings to a retracted position in advance. This preliminary action prevents interference and enables wide opening of the conveying passage without collision.
Solution Approach 2:
The system incorporates coordinated movement where the positioning of the upper conveying guide and the movable part of the sheet stack tray are linked. When one component moves, the other responds accordingly, ensuring smooth operation without interference through automated feedback coordination.
3Productivity
If the sheet stack tray is positioned to allow wide opening of the conveying passage, then the productivity for jam handling is improved, but the sheet receiving function is compromised
Solution Approach 1:
The movable part of the sheet stack tray dynamically adjusts its position based on operational needs. It swings to a retracted position during jam handling to allow wide opening of the conveying passage, then returns to the sheet receiving position for normal sheet stacking, optimizing both jam handling efficiency and sheet stacking function.
Data Source
AI summary
A sheet conveying device includes a sheet conveying passage, an upper conveying guide provided in the sheet conveying passage and facing the upper surface of a sheet, a lower conveying guide facing the lower surface of the sheet, a conveying member conveying the sheet along the sheet conveying passage, a sheet stack tray arranged above the upper conveying guide. The upper conveying guide is swingable up and down, with one end part of it in the sheet conveying direction or in the sheet width direction perpendicular to the sheet conveying direction serving as a pivot shaft. The sheet stack tray has a movable part making contact with the upper conveying guide at least when it swings, and the movable part is movable between a sheet receiving position where it forms a sheet stack surface and a retracted position where it has swung upward from the sheet receiving position.