Movable Sheet Feeder Supporter for Stable Paper Handling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sheet feeders struggle to feed sheets stably and consistently when a large number of sheets are stacked on the tray, as the leading ends of top-layer sheets often contact the feed roller, leading to increased pressure and frictional forces that can cause sheets to be inserted between the roller and setting units, resulting in unstable feeding.
Innovation Solution
A sheet feeder design featuring a sheet tray that supports sheets in a slanted state, a feed roller positioned to face the lower end of the top sheet, a movable supporter under the tray to support lower ends of sheets, and a displacement mechanism that adjusts the supporter's position based on the pressure applied by the feed roller during rotation, preventing sheets from being inserted between the roller and setting units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of sheets stacked on the sheet tray increases, then the sheet tray can hold more sheets, but the leading ends of top-layer sheets contact the feed roller instead of the setting units, causing unstable feeding
Solution Approach 1:
The supporter is made movable relative to the feed roller, allowing it to dynamically adjust its position based on the sheet stack height and pressure conditions, rather than being fixed in place
Solution Approach 2:
The displacement mechanism proactively adjusts the supporter position before feeding issues occur by responding to pressure changes, preventing sheets from being incorrectly inserted between the feed roller and setting units
2Speed
If the feed roller applies pressure to sheets during rotation, then sheets are fed forward, but frictional forces between adjacent sheets increase causing sheets to be inserted between the feed roller and setting units
Solution Approach 1:
The displacement mechanism uses pressure feedback from the feed roller's interaction with the sheets to automatically adjust the supporter position, creating a closed-loop control system that responds to actual feeding conditions
Solution Approach 2:
The system changes the positional parameter of the supporter based on pressure conditions, adjusting the geometric relationship between components to maintain optimal sheet contact and separation
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 design ensures stable and certain sheet feeding even with a high number of sheets, reducing frictional forces and preventing the feed roller from slipping or feeding multiple sheets together, allowing for sequential, reliable sheet-by-sheet feeding.
Implementation Method 1
a displacement mechanism configured to displace the supporter farther from the feed roller depending on a pressure which the feed roller applies to the sheets when rotating
Data Source
AI summary
A sheet feeder includes a sheet tray configured to support one or more sheets stacked thereon in a slanted state, a feed roller disposed to face a lower end of a top one of the sheets stacked on the sheet tray, the feed roller being configured to feed the sheets, a supporter disposed under the sheet tray movably relative to the feed roller, the supporter being configured to support, on an upper surface thereof, lower ends of the sheets stacked on the sheet tray, and a displacement mechanism configured to displace the supporter farther from the feed roller depending on a pressure which the feed roller applies to the sheets when rotating.