Skew Correction Roller Unit for Precise Sheet Registration
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Solution Overview
Problem
Existing sheet conveyance apparatuses in image forming apparatuses face limitations in effectively correcting skew feeding of sheets, necessitating an improved configuration for accurate image formation.
Innovation Solution
A sheet conveyance apparatus with a skew feeding correction unit comprising a roller unit and an attachment/detachment portion, featuring independently rotatable rollers and turning mechanisms to correct skew feeding, allowing for independent control of roller speeds and directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If skew feeding correction rollers are arranged in parallel and independently rotatable, then skew feeding correction capability is improved, but device complexity increases
Solution Approach 1:
The roller unit is divided into multiple independently controllable skew feeding correction rollers arranged in parallel. Each roller can be independently rotated and controlled, allowing precise correction of skew feeding by differentiating rotational speeds between rollers. This segmentation enables fine-grained control over sheet conveyance while maintaining manageable complexity through modular design.
2Manufacturing precision
If turning mechanisms are added to adjust roller orientation, then lateral registration accuracy is improved, but device complexity increases
Solution Approach 1:
The roller unit incorporates turning mechanisms that enable dynamic adjustment of roller orientation angles. This allows the rollers to be tilted at different angles relative to the sheet conveyance direction, providing dynamic control over both skew feeding correction and lateral registration. The dynamic adjustability ensures high precision while maintaining operational flexibility.
3Ease of repair
If roller unit is made detachable, then ease of maintenance is improved, but reliability may worsen due to attachment/detachment operations
Solution Approach 1:
The roller unit is designed as a detachable module that can be easily attached and detached from the main apparatus. This segmentation allows for simplified maintenance and replacement operations. The attachment and detachment portion is specifically designed to maintain reliable connections during operation while enabling easy access for maintenance, thus balancing ease of repair with operational reliability.
Data Source
AI summary
A sheet conveyance apparatus includes a skew feeding correction unit. The skew feeding correction unit includes a roller unit, and an attachment and detachment portion to and from which the roller unit is attachable and detachable. The roller unit includes a first skew feeding correction roller configured to convey a sheet, a second skew feeding correction roller configured to convey the sheet, a first turning mechanism configured to turn the first skew feeding correction roller around a first shaft extending in an intersecting direction intersecting a conveyance direction of the sheet and a width direction orthogonal to the conveyance direction, a second turning mechanism configured to turn the second skew feeding correction roller around a second shaft extending in the intersecting direction, and a support member supporting the first skew feeding correction roller, the first turning mechanism, the second skew feeding correction roller, and the second turning mechanism.