Independent Moving Members for Sheet Alignment Stability
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Solution Overview
Problem
Existing sheet feeding devices face issues with stable sheet movement due to deformation in the sheet width direction, leading to potential oblique movement and inadequate return force when one side is deformed, causing misalignment and double feeding.
Innovation Solution
A sheet feeding device with a moving unit comprising independently thrust-moving first and second moving members, positioned between the separation and feeding units, which maintains sheet contact and applies force to move the sheet stably, even with deformations in the sheet width direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a moving unit with multiple moving members is used to move the sheet back, then the sheet can be moved in the upstream direction, but the sheet may move obliquely when one side is deformed
Solution Approach 1:
The moving unit is divided into multiple independent moving members (first moving member and second moving member) that can move independently of each other. This segmentation allows each moving member to adapt to local sheet deformations without affecting the other, preventing oblique movement and maintaining sheet alignment stability during the return operation.
Solution Approach 2:
The moving members are designed to move dynamically and independently in response to sheet deformations. When one side of the sheet is deformed, the corresponding moving member adjusts its position while the other moving member maintains its operation, enabling the sheet to be moved back stably without oblique movement.
2Device complexity
If the moving members are connected to move together, then the mechanism is simpler, but the return force is insufficient when sheet deformation occurs
Solution Approach 1:
The moving unit is segmented into independent moving members with individual drive mechanisms. This allows each moving member to generate full return force independently when pressing against the sheet, ensuring sufficient return force even when sheet deformation occurs, while maintaining reasonable structural complexity.
Solution Approach 2:
Each moving member is equipped with independent drive capabilities, allowing local adaptation to sheet conditions. When sheet deformation occurs on one side, the corresponding moving member maintains full pressing force while the other moving member operates normally, ensuring adequate return force distribution across the sheet width.
3Device complexity
If a single moving member is used, then the mechanism is simpler, but it cannot handle sheet deformations in the width direction
Solution Approach 1:
The moving unit is divided into multiple independent moving members positioned across the sheet width. This segmentation enables each moving member to independently adapt to local sheet deformations, providing versatility in handling various deformation scenarios while maintaining manageable structural complexity.
Solution Approach 2:
Each moving member is designed to operate independently and adapt to local sheet conditions. This local quality approach allows the moving unit to handle sheet deformations in the width direction effectively, as each moving member can respond to the specific deformation state of the sheet portion it contacts.
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
Ensures stable and accurate sheet movement, preventing oblique movement and double feeding by allowing independent thrust-motion of moving members to accommodate sheet deformations, maintaining consistent contact and effective separation.
Implementation Method 1
a sheet is separated by the resistance generated by the torque limiter and a coefficient of friction of the separation roller
Data Source
AI summary
A sheet feeding device includes a sheet stacking unit to stack a plurality of sheets, a feeding unit to feed sheets stacked on the sheet stacking unit, a separation unit, and a moving unit provided with at least a first moving member and a second moving member. The separation unit contacts the sheets fed by the feeding unit and separates a sheet from the sheets. The moving unit contacts the first and the second moving members to move a sheet contacting the first and the second moving members to an upstream side in a feeding direction. A leading edge of the sheet is positioned between the separation unit and the feeding unit. When pressed by the sheet, the first and the second moving members are configured to thrust-move independently of each other.