Image Reading Apparatus Dynamic Ejection Speed Control for Media Stacking
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Solution Overview
Problem
Image reading apparatuses face challenges in stacking media of different lengths in an orderly fashion due to difficulties in adjusting ejection speeds to match varying media lengths, often resulting in random stacking.
Innovation Solution
The image reading apparatus employs a controller to determine media lengths and implement weak or strong deceleration control by adjusting the ejection speed, ensuring that media are ejected at speeds lower than the transport speed, thereby facilitating orderly stacking on the ejection stacker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the ejection speed is set to be lower than the transport speed to enable orderly stacking, then the stacking order is improved, but the productivity decreases
Solution Approach 1:
The ejection speed is made dynamic rather than fixed. The system automatically adjusts the ejection speed based on the detected length of each medium: using a first ejection speed for longer media and a second ejection speed for shorter media. This dynamic adjustment enables orderly stacking while maintaining optimal processing speed for different medium types.
Solution Approach 2:
The system changes the ejection speed parameter according to the medium length parameter. By detecting the length of each medium and selecting appropriate ejection speeds from multiple available speeds, the system resolves the contradiction between maintaining stacking order and preserving processing efficiency.
2Manufacturing precision
If the ejection speed is reduced to match varying media lengths, then the stacking quality is improved, but the processing time increases
Solution Approach 1:
The system dynamically adjusts ejection speed based on medium length detection. Longer media are ejected at a slower first speed to ensure proper stacking, while shorter media are ejected at a faster second speed to minimize processing time. This dynamic approach maintains stacking quality without unnecessarily extending processing time for all media types.
Solution Approach 2:
The system implements parameter changes by selecting from multiple ejection speed values based on the detected medium length. This allows the system to optimize the balance between stacking quality and processing time by using slower speeds only when necessary for longer media and faster speeds for shorter media.
3Device complexity
If a single ejection speed is used for all media, then the device complexity is reduced, but the adaptability to different media lengths deteriorates
Solution Approach 1:
The system changes the ejection speed parameter based on medium length detection. By implementing multiple ejection speed levels and selecting appropriate speeds based on detected medium characteristics, the system achieves adaptability to different media lengths while maintaining relatively simple control logic through automated detection and selection.
Solution Approach 2:
The system transitions from static single-speed control to dynamic multi-speed control. The ejection speed is automatically adjusted based on real-time detection of medium length, enabling the system to adapt to varying media requirements without requiring complex manual configuration or multiple specialized components.
Data Source
AI summary
When a transport section transports be a media, a controller of an image reading apparatus determines the lengths of the media in the transport direction, based on detection results of a medium detector. When determining that a length of a medium is equal to or more than a threshold and then determining that a length of a subsequent medium is equal to or more than the threshold, the controller decreases an ejection speed of the subsequent medium to a second speed by the transport section. When determining that a length of a medium is equal to or more than the threshold and then determining that a length of a subsequent medium is less than the threshold, the controller decreases the ejection speed from the first speed to a third speed that is lower than the second speed by the transport section.