Sheet Feeding Apparatus Tray Tilting Compensation
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Solution Overview
Problem
Existing sheet feeding apparatuses face issues with tilting sheet trays due to inaccuracies in components like wires and winding drums, leading to feeding failures and increased height requirements to prevent contact with the sheet feed unit, which complicates manufacturing and increases costs.
Innovation Solution
The apparatus incorporates a sheet feeding system with adjustable linear members and winding units that allow for precise adjustment of the sheet stacking base's orientation, using adjustment members to change the path lengths of the linear members and fix their positions, ensuring horizontal alignment without high component accuracy, thus preventing tilting and reducing the need for increased height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the accuracy of components such as wires and winding drums is not managed with high accuracy, then the sheet tray may be tilted with respect to the horizontal direction, but increasing component accuracy increases manufacturing costs
Solution Approach 1:
The patent introduces adjustable path lengths for the linear members (wires) that allow compensation for component inaccuracies. By changing the effective length of the wires through adjustment members, the system can compensate for variations in wire length and winding drum accuracy, maintaining horizontal alignment without requiring high-precision components.
Solution Approach 2:
The patent makes the wire path lengths adjustable rather than fixed. The adjustment members enable dynamic modification of the wire lengths during installation or maintenance, allowing the system to adapt to component variations and maintain proper horizontal alignment of the sheet tray.
2Reliability
If a space is provided between the uppermost sheet and the lower surface of the sheet feed unit to prevent contact, then feeding failures are reduced, but the height of the entire apparatus is increased
Solution Approach 1:
By enabling precise adjustment of the sheet tray's horizontal alignment through adjustable wire path lengths, the system ensures that sheets are fed at the correct height and angle. This prevents contact between the sheet and the sheet feed unit lower surface, improving feeding reliability without requiring excessive clearance and thus avoiding increased apparatus height.
3Manufacturing precision
If the sheet tray is tilted due to component inaccuracies, then one end of the uppermost sheet is raised, but this causes feeding failure and oblique movement
Solution Approach 1:
The patent employs adjustable path lengths for the linear members that allow compensation for tilting. By modifying the effective wire lengths on different sides of the sheet tray, the system can counteract tilting caused by component inaccuracies, ensuring the sheet tray remains horizontal during feeding operations and preventing feeding failures.
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 solution ensures accurate and stable sheet feeding by maintaining the sheet tray's horizontal alignment, reducing feeding failures and allowing for a more compact design by eliminating the need for increased height adjustments, thereby lowering manufacturing and operational costs.
Implementation Method 1
a first winding unit configured to lift the sheet stacking portion by winding the linear member supporting the first lifting portion, a second winding unit configured to lift the sheet stacking portion by winding the linear member supporting the second lifting portion
Implementation Method 2
a linear member configured to liftably support the first lifting portion and the second lifting portion, the linear member being stretched between the first lifting portion and the second lifting portion
Data Source
AI summary
A sheet feeding apparatus includes a sheet accommodating unit, a sheet feeding unit, a first lifting portion, a second lifting portion, and a linear member configured to liftably support the first lifting portion and the second lifting portion, and stretched between the first lifting portion and the second lifting portion on a lower side of the stacking surface. In addition, a first winding unit, a second winding unit, and an adjustment member adjust both a first distance of the linear member between the first winding unit and the first lifting portion and a second distance of the linear member between the second winding unit and the second lifting portion.