Rotatable Detection Unit for Feed Roller Maintenance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In sheet feeding devices of image forming apparatuses, the presence of a sheet detection sensor near the feed roller hinders the attachment and detachment of the feed roller during maintenance, requiring time-consuming operations and expertise for maintenance tasks.
Innovation Solution
A sheet feeding device design where the detection unit rotates to form a space adjacent to the feed roller, allowing for easy attachment and detachment without needing to remove the detection sensor, facilitating maintenance operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sheet detection sensor is arranged near the feed roller to detect sheet passage, then the sheet detection function is improved, but the attachment and detachment operation of the feed roller is hindered
Solution Approach 1:
The detection unit is designed to be rotatable relative to the feed roller, transitioning between a first position where it detects sheets and a second position where it clears the attachment/detachment path. This dynamic repositioning resolves the contradiction by making the detection unit's position adaptable rather than fixed.
Solution Approach 2:
Instead of moving the detection unit linearly along the attachment path, the invention rotates it into a different spatial dimension (angular displacement). This rotational movement creates clearance in the attachment direction while maintaining detection capability in its operational position.
2Reliability
If the sheet detection sensor is fixed near the feed roller, then the detection function is reliable, but maintenance requires expert servicemen and takes much time
Solution Approach 1:
The detection unit is segmented as a separate, independently rotatable component from the feed roller. This segmentation allows the feed roller to be maintained without requiring detachment of the detection sensor, as the sensor can be rotated out of the way during maintenance operations.
Solution Approach 2:
The rotatable detection unit enables non-expert personnel to perform maintenance by simply rotating the detection unit to a second position, creating clearance for feed roller removal. This self-service capability eliminates the need for expert servicemen and reduces maintenance time.
3Measurement precision
If the detection unit is positioned to detect sheets, then sheet passage detection is accurate, but it occupies space needed for feed member attachment and detachment
Solution Approach 1:
The detection unit's position is made dynamic through rotation, allowing it to occupy the detection position during operation and the clearance position during maintenance. This dynamic positioning resolves the spatial conflict between detection accuracy and attachment space requirements.
Solution Approach 2:
The detection unit periodically transitions between its detection position and clearance position. During normal operation, it occupies the detection position for accurate sheet passage detection; during maintenance, it rotates to the clearance position to provide access space.
Data Source
AI summary
In an embodiment of the invention, a detection unit arranged near a feed roller is rotatably arranged. A space where the feed roller is attached and detached is formed by rotating the detection unit. The detection unit is rotated in accordance with an operation of attaching and detaching the feed roller to and from a shaft, and the maintenance of the feed roller is performed while the formed space is used.