Rockable Driven Roller for Recording Apparatus
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Solution Overview
Problem
Existing recording apparatuses face issues with increased rotational load on driven rollers, leading to sheet jamming and image disturbances due to the rotational load imbalance between driving and driven rollers, especially when the sheet's advancing direction differs from the rotational direction of the oblique transporting roller.
Innovation Solution
A recording apparatus with a pair of rollers where the driven roller's rotary portion is supported rockably on a shaft, allowing it to shift and align its rotational axis with the sheet's advancing direction, reducing rotational load and preventing slip, thus maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the oblique transporting roller is used to correct lateral register, then the sheet position is corrected along the reference surface, but the rotational load on the roller increases greatly when the sheet advancing direction differs from the roller rotation direction
Solution Approach 1:
The driven roller is designed with a rockable support mechanism allowing its rotational axis to dynamically adjust its orientation. The roller can tilt within a predetermined angle range to align its rotation direction with the sheet advancing direction, optimizing the force transmission and reducing rotational load during lateral register correction
Solution Approach 2:
The orientation parameter of the driven roller's rotational axis is changed dynamically. The roller can rotate within a predetermined angle range to adjust the angle between its rotation direction and the sheet advancing direction, thereby optimizing performance and reducing excessive rotational load
2Reliability
If the rotational load on the oblique transporting roller is great, then the roller might become hard to rotate, but this causes sheet jamming and prevents proper sheet transportation
Solution Approach 1:
The driven roller's rotational axis orientation is made dynamic through a rockable support mechanism. The roller automatically adjusts its tilt angle to align with the sheet advancing direction, ensuring smooth rotation and preventing sheet jamming by optimizing the mechanical interaction between the roller and sheet
Solution Approach 2:
The system preemptively adjusts the driven roller's orientation to prevent excessive rotational load before it causes jamming. By aligning the roller's rotation direction with the sheet advancing direction in advance, the mechanism prevents the harmful effect of jamming from occurring
3Productivity
If the oblique transporting roller slips with respect to the sheet, then the sheet might be transported, but image disturbance occurs on the recorded sheet
Solution Approach 1:
The driven roller dynamically adjusts its rotational axis orientation to match the sheet advancing direction, ensuring optimal frictional contact and preventing slip. This dynamic alignment maintains both transportation efficiency and image quality by eliminating the relative motion that causes image disturbance
Solution Approach 2:
The orientation parameter of the driven roller is adjusted to optimize the contact between the roller and sheet. By changing the roller's rotational direction to align with the sheet advancing direction, the system prevents slip and the associated image disturbance while maintaining effective sheet transportation
Data Source
AI summary
There is provided a recording apparatus including a recording unit and a transporting mechanism to transport a recording medium. The transporting mechanism includes, a guide surface to guide an end portion, of the recording medium, in a direction intersecting with a transporting direction of the recording medium, and a pair of rollers arranged, in a direction orthogonal to the guide surface, at a position between the guide surface and a central portion of the transporting path. The pair of rollers includes, a driving roller to transport the recording medium, and a driven roller having a rotary portion facing a recording surface, of the recording medium, on which the image is recorded, and configured to rotate about a rotation axis thereof following movement of the recording medium, and a first shaft to support the rotary portion rotatably. The rotary portion is supported rockably with respect to the first shaft.