Medium Transport Roller Cleaning During Cassette Insertion
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Solution Overview
Problem
Existing medium transport apparatuses with insertable and removable medium housing units suffer from inadequate cleaning performance of transport units due to contamination from paper dust and similar debris, particularly in designs like JP-A-2002-211779, where the adhesive member's cleaning effectiveness is insufficient.
Innovation Solution
A medium transport apparatus design where the transport unit and a cleaning member rub against each other during insertion and removal of the medium housing unit, increasing the relative movement distance to enhance cleaning efficiency, with the cleaning member being easily accessible and replaceable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the adhesive member is used to clean the sheet feeding roller by contact during pullout, then the cleaning mechanism is simple, but the cleaning performance is insufficient
Solution Approach 1:
The cleaning member is designed to move dynamically relative to the transport unit during the insertion and removal of the medium housing unit. This dynamic movement creates extended rubbing contact between the cleaning member and transport unit, significantly improving cleaning performance while maintaining mechanism simplicity.
2Length of moving object
If the transport unit and cleaning member move relative to each other during insertion and pullout, then the cleaning contact distance is extended, but the device complexity increases
Solution Approach 1:
The insertion and removal operation of the medium housing unit serves dual functions: it transports the medium and simultaneously enables the cleaning member to clean the transport unit. This multi-functionality achieves extended cleaning contact distance without adding separate cleaning mechanisms, thus avoiding increased device complexity.
3Ease of repair
If the cleaning member is easily accessible and replaceable, then the ease of maintenance is improved, but the device complexity increases
Solution Approach 1:
The cleaning member is designed as a separate, detachable component that can be easily accessed and replaced independently from the main device body. This segmentation improves ease of maintenance while keeping the overall device complexity low, as the cleaning member can be serviced without disassembling the entire apparatus.
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 enhanced design improves cleaning performance by allowing for extended rubbing contact between the transport unit and cleaning member, effectively removing contaminants while maintaining a simple configuration and facilitating easy maintenance.
Implementation Method 1
the transport unit and the cleaning member rub against each other as the transport unit and the cleaning member move relative to each other
Implementation Method 2
the transport unit and the cleaning member rub against each other as the transport unit and the cleaning member move relative to each other in conjunction with insertion and pullout
Data Source
AI summary
A medium transport apparatus includes a medium housing unit configured to house a medium and to be inserted into and pulled out from an apparatus main body along first directions, a transport unit provided in one of the apparatus main body and the medium housing unit, having a rotation shaft along the first directions, and contacting the medium and transporting the medium in second directions, and a cleaning member provided in the other of the apparatus main body and the medium housing unit, and configured to contact the transport unit and clean the transport unit, wherein the transport unit and the cleaning member rub against each other as the transport unit and the cleaning member move relative to each other in conjunction with insertion and pullout of the medium housing unit into and from the apparatus main body.