Dual Bar Tension Control for Consistent Paper Winding
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Solution Overview
Problem
In existing printers, the tension bar's swing causes fluctuations in the posture and tension of recording paper between the roll and the tension bar, leading to inconsistent paper wrapping and tension variations.
Innovation Solution
A recording apparatus and transport device design featuring a first bar member wrapped around one surface of the medium, a second bar member between the first bar and the winding unit wrapped around the opposite surface, and an arm member that swings about a rotation axis to support both, maintaining consistent tension and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single tension bar is used to support the recording paper during winding, then the device complexity is reduced, but the stability of paper tension and orientation deteriorates
Solution Approach 1:
The single tension bar is divided into two separate bar members (first bar member and second bar member) that independently support opposite surfaces of the recording paper. This segmentation allows each bar to maintain consistent tension on its respective surface, preventing the posture fluctuations and tension variations that occur with a single swinging tension bar.
2Adaptability or versatility
If the tension bar swings about a support shaft during winding, then the adaptability to different paper widths is improved, but the precision of paper orientation and tension control deteriorates
Solution Approach 1:
The arm member acts as an intermediary that connects both bar members to the winding shaft. By making the arm member swingable about the winding shaft (coinciding rotation axis), it mediates between the need for adaptability (swinging motion) and precision (coaxial alignment), allowing the bars to adapt to different paper widths while maintaining consistent orientation relative to the winding roll.
Data Source
AI summary
A recording apparatus capable of recording on a medium includes a recording unit configured to record on a medium, a transport unit configured to transport the medium, a winding unit configured to rotate about a rotation axis and windup the medium transported by the transport unit, and a first bar member configured to be wrapped around by a first surface of the medium, a second bar member disposed between the first bar member and the winding unit and configured to be wrapped around by a second surface of the medium, and an arm member swingable about a swing axis that coincides with the rotation axis, wherein the arm member supports the first bar member and the second bar member.