Segmented Tapping Device for Variable-Length Media Alignment
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Solution Overview
Problem
Existing tapping devices for aligning media in image forming apparatuses suffer from misalignment issues, particularly when dealing with media of varying lengths, due to the use of a single displacement unit supported by a bias unit.
Innovation Solution
A tapping device with multiple displacement units, each supported by a bias unit and positioned at different points, allows for stable alignment of media regardless of length, using an approaching and separation unit to adjust the displacement units in a crossing direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single displacement unit is used, then the device complexity is reduced, but the alignment precision deteriorates for media of varying lengths
Solution Approach 1:
The displacement unit is divided into multiple independent displacement units (first displacement unit and second displacement unit) positioned at different locations along the transport direction. Each displacement unit independently taps the medium from the other side of the crossing direction, allowing them to work together to align media of various lengths without requiring a single complex adjustable mechanism.
2Manufacturing precision
If multiple displacement units are used, then the alignment precision is improved, but the device complexity increases
Solution Approach 1:
Multiple displacement units are combined in a simplified configuration where they share common support structures and the approaching and separation unit. The first and second displacement units are arranged at different positions along the transport direction but operate through a unified mechanism controlled by the approaching and separation unit, reducing overall system complexity while maintaining high alignment precision.
3Device complexity
If the displacement unit is fixed in position, then the device complexity is reduced, but the adaptability to different media lengths deteriorates
Solution Approach 1:
The displacement units are designed to be dynamically adjustable through the approaching and separation unit, which moves in the crossing direction to bring the displacement units into contact with or separate them from the medium. This dynamic configuration allows the same structure to adapt to media of different lengths without requiring complex individual adjustment mechanisms for each displacement unit.
4Device complexity
If a single bias unit is used, then the device complexity is reduced, but the stability of the tapping direction deteriorates
Solution Approach 1:
The biasing function is segmented into multiple bias units, with each displacement unit having its own bias unit. This segmentation provides independent force application for each displacement unit, ensuring stable tapping direction for each unit while they operate collectively. The multiple bias units work in parallel to maintain consistent alignment without requiring a single complex biasing mechanism.
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
The solution effectively suppresses media misalignment and ensures stable tapping direction, reducing the likelihood of media being caught by the displacement units, thereby maintaining accurate alignment for post-processing.
Implementation Method 1
a displacement unit that is supported by the approaching and separation unit via a bias unit, at each of positions shifted from each other in the transport direction to be displaceable in the crossing direction
Data Source
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AI summary
A tapping device includes a contact unit that comes into contact with a medium from one side of a crossing direction that crosses a transport direction of the medium; an approaching and separation unit that approaches and is separated from the contact unit in the crossing direction; and a displacement unit that is supported by the approaching and separation unit via a bias unit, at each of positions shifted from each other in the transport direction to be displaceable in the crossing direction, and taps the medium in contact with the contact unit from the other side of the crossing direction by the approaching and separation unit approaching the contact unit.