Sheet Conveying Device Orthogonal Movement Correction
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Solution Overview
Problem
Existing sheet conveying devices in image forming systems face limitations in correcting the inclination of sheets, particularly for those with significant inclinations, due to constraints in bending and lateral sliding, which can result in incomplete alignment and potential noise or creasing issues.
Innovation Solution
The introduction of an orthogonal movement permitting part within the sheet conveying device, which allows the sheet to move laterally in the conveying path, enables sufficient correction of sheet inclination by applying a lateral force, reducing excessive bending and preventing Z-folding or creasing, through a contact surface with anisotropic friction coefficients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the leading end of the sheet is aligned by bringing it into contact with the nip of aligning rollers, then the sheet inclination is corrected, but the sheet is bent or laterally slipped by the conveying roller part, resulting in insufficient alignment correction for sheets with significant inclination
Solution Approach 1:
The conveying path is divided into two functional sections: a first conveying path that permits orthogonal (lateral) movement for inclination correction, and a second conveying path that prevents orthogonal movement for stable conveyance. This segmentation allows the sheet to be laterally adjusted during initial conveyance and then stabilized for subsequent processing.
Solution Approach 2:
The sheet conveying device transitions from a static conveying system to a dynamic one where the conveying path characteristics change along the conveyance direction. The first conveying path provides dynamic lateral adjustment capability, while the second conveying path provides static stabilization, enabling both inclination correction and precise positioning.
2Manufacturing precision
If the sheet is conveyed longer than the distance from the conveying roller part to the aligning roller to achieve alignment, then the leading end of the sheet can be aligned, but the bending amount and lateral sliding amount are limited, making it impossible to sufficiently correct sheets with certain inclination
Solution Approach 1:
The conveying path has different local qualities: the first conveying path section has the property of permitting orthogonal movement to enable lateral adjustment, while the second conveying path section has the property of preventing orthogonal movement for stable conveyance. This local differentiation allows effective inclination correction without requiring excessive conveying path length.
3Manufacturing precision
If the sheet is laterally slipped or bent during alignment, then the leading end can be aligned with the aligning roller, but noise and creasing issues occur
Solution Approach 1:
The sheet inclination is corrected in advance during the conveyance through the first conveying path, before the sheet reaches the aligning rollers and enters the image forming unit. This preliminary alignment action prevents the need for forceful lateral slipping or bending at later stages, thereby avoiding noise and creasing.
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 effectively corrects the sheet inclination, enhances alignment accuracy, reduces noise, and prevents excessive bending or creasing, allowing for more precise handling of sheets with varying stiffness and rigidity.
Implementation Method 1
through a contact surface with anisotropic friction coefficients
Data Source
AI summary
According to one embodiment, a sheet conveying device includes a conveying path forming unit and an orthogonal movement permitting part. The conveying path forming unit forms a path for conveying a sheet. The orthogonal movement permitting part is provided in the conveying path. The orthogonal movement permitting part conveys the sheet along the conveying direction. The orthogonal movement permitting part allows the sheet to move in a conveying orthogonal direction orthogonal to the conveying direction.