Bent Shaft Driven Roller for Wrinkle-Free Medium Conveyance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Medium conveying apparatuses often suffer from wrinkles in the medium being conveyed, leading to noise and degradation in captured images due to the existing design of conveyance rollers and driven rollers, which results in suboptimal image quality.
Innovation Solution
The apparatus incorporates a motor-driven system with a first shaft and a second shaft, where the conveyance roller is fixed to the first shaft, and the driven roller is mounted on the second shaft, with pressing members ensuring the center portion of the second shaft is pressed downstream, preventing skew and wrinkles by maintaining uniform pressure and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the driven roller is mounted on a straight second shaft, then the structure is simple and easy to manufacture, but wrinkles occur in the medium and image quality deteriorates
Solution Approach 1:
The second shaft is designed with asymmetric bending toward the downstream side, creating a specific curvature profile that compensates for the natural tendency of the medium to wrinkle. This asymmetric shape allows the driven roller to apply pressure more effectively at the center portion while maintaining proper alignment, resolving the contradiction between structural simplicity and alignment precision.
Solution Approach 2:
The shaft geometry parameter is changed from a straight configuration to a bent configuration with specific curvature. This parameter change in the shaft shape enables the driven roller to maintain optimal contact pressure and alignment with the conveyance roller, preventing medium wrinkles while keeping the overall structure relatively simple.
2Manufacturing precision
If pressing members are added to press the center portion of the second shaft, then medium alignment is improved and wrinkles are suppressed, but device complexity increases
Solution Approach 1:
The pressing function is merged with the shaft structure itself by bending the second shaft, eliminating the need for separate pressing members. The bent shaft configuration inherently provides the pressing action at the center portion through its geometry, combining the support and pressing functions into a single integrated component, thus reducing device complexity while maintaining alignment precision.
Solution Approach 2:
The second shaft serves dual purposes: it supports the driven roller and simultaneously provides the pressing force needed to prevent medium wrinkles through its bent configuration. The shaft's own geometric form performs the pressing function that would otherwise require additional components, enabling the structure to serve itself and reducing overall system complexity.
Data Source
AI summary
A medium conveying apparatus includes a motor, a first shaft, a conveyance roller, a second shaft, a driven roller, and a presser. The motor generates a driving force. The first shaft is rotated by the driving force. The first shaft extends linearly in a direction perpendicular to a medium conveyance direction. The conveyance roller is fixed to the first shaft to convey a medium. The driven roller is mounted on the second shaft to rotate following the conveyance roller. The presser presses a center portion of the second shaft in a direction perpendicular to the medium conveyance direction to a downstream side in the medium conveyance direction.