Pivotable Presser Plate for Sheet Conveying Apparatus
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing sheet conveying apparatus experiences multiple feeding issues as the contact angle increases from a fully loaded to a near empty state, leading to a large pressing force and overlapping sheet conveyance.
Innovation Solution
A sheet conveying apparatus with a pivotable presser plate and arm mechanism that adjusts the contact angle to maintain it below a maximum angle, preventing multiple feeding by ensuring a consistent and reduced pressing force throughout the sheet supply level changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the contact angle increases from fully loaded to near empty state, then the sheet supply level decreases, but the pressing force becomes large causing multiple feeding
Solution Approach 1:
The presser plate is made pivotable about a presser-plate pivot axis, allowing it to dynamically adjust its position and the contact angle as sheets are consumed. This dynamic adjustment prevents the contact angle from becoming too large, thereby controlling the pressing force to avoid multiple feeding while accommodating varying sheet supply levels
Solution Approach 2:
The system changes the contact angle parameter by pivoting the presser plate to different positions. By controlling the contact angle to be less than a maximum angle throughout the sheet supply cycle, the pressing force is regulated to prevent multiple feeding occurrences
2Reliability
If the contact angle is kept small to prevent multiple feeding, then multiple feeding is reduced, but the device complexity increases due to pivot mechanism
Solution Approach 1:
A pivot mechanism is introduced to enable the presser plate to rotate about a presser-plate pivot axis, dynamically adjusting the contact angle based on sheet supply level. This mechanical dynamic adjustment ensures reliable single-sheet feeding while maintaining relatively simple structural implementation
Data Source
AI summary
A sheet conveying apparatus, including: a sheet storage portion; a roller to convey sheets by rotating about a rotation axis; an arm rotatably supporting the roller and pivotable about an arm pivot axis; a presser plate pivotable about a presser-plate pivot axis; and a pivot mechanism to pivot the presser plate such that a contact angle, which is an angle defined upstream in a sheet conveyance direction by the arm and an uppermost one of the sheets contacting the roller, is less than a maximum angle in a time period from a sheet maximally loaded state to a sheet minimally loaded state, the maximum angle being an angle defined upstream in the conveyance direction by: only one sheet assumed to be placed on the presser plate which is the presser plate in the maximally loaded state; and the arm the roller of which contacts the one sheet.