Sheet Feeding Roller Replacement Access in Image Formers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional image forming apparatuses face difficulties in replacing the feeding roller due to its location at the lower section of the main body, which results in poor workability and increased complexity, especially when the sheet feeding cassette has a large capacity, making it hard to access and replace the roller without detaching the cassette and inserting a hand through a small clearance.
Innovation Solution
The image forming apparatus includes a plurality of sheet storage portions with a lifting mechanism, a sheet feeding portion above each storage portion, a detecting portion to signal mounting status, and a controller that prevents the sheet stacking portion from being lifted when an adjacent sheet storage portion is drawn or detached, allowing for easier replacement of the feeding roller by maintaining visibility and accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the feeding roller is located at the lower section of the main body to enable sheet feeding from multiple cassettes, then the sheet feeding function is improved, but the ease of replacing the feeding roller deteriorates due to poor accessibility and visibility
Solution Approach 1:
The sheet stacking portion is made movable between a lowered position (for sheet feeding operation) and a lifted position (for maintenance access). The lifting mechanism dynamically adjusts the position of the sheet stacking portion to provide access to the feeding roller when needed, while maintaining the sheet feeding function during normal operation.
Solution Approach 2:
The sheet feeding system is divided into independent sheet storage portions (cassettes) that can be individually drawn or detached. This segmentation allows maintenance personnel to access the feeding roller by drawing the cassette above it, creating space and visibility for replacement without affecting other cassettes.
2Productivity
If the sheet stacking portion is lifted automatically when a cassette is mounted, then the sheet feeding operation is improved, but the ease of replacing the feeding roller deteriorates because the sheet stacking portion blocks access to the feeding roller
Solution Approach 1:
The lifting mechanism is controlled dynamically based on the operational state. When a cassette is mounted during normal operation, the sheet stacking portion is lifted to enable sheet feeding. When maintenance is needed and the cassette is drawn, the sheet stacking portion is lowered to provide access to the feeding roller.
Solution Approach 2:
Before replacing the feeding roller, the cassette above the target cassette is drawn in advance to create access space. The controller detects this state and prevents the sheet stacking portion from being lifted, thereby preparing the system for easy maintenance access.
3Quantity of substance
If the sheet feeding cassette has a large capacity to increase sheet storage, then the sheet storage function is improved, but the ease of replacing the feeding roller deteriorates due to the hindrance of the large-capacity cassette to the standing position of the worker
Solution Approach 1:
The sheet storage is divided into multiple separate cassettes that can be independently drawn. This segmentation allows the worker to draw the cassette above the target area, creating access space while the large-capacity cassettes remain in their storage positions, thus maintaining both high storage capacity and ease of maintenance.
Data Source
AI summary
The present invention provides an image forming apparatus that can facilitate a replacement of a sheet feeding portion.When a detecting portion detects that a sheet feeding cassette is mounted, a controller controls a driving portion in such a manner as to lift a sheet supporting plate for the mounted sheet feeding cassette. When the detecting portion detects that a sheet feeding cassette is mounted, the controller controls a driving portion in such a manner as not to lift a sheet supporting plate for the mounted sheet feeding cassette in the case where it is determined that a sheet feeding cassette nearest a feeding roller of the mounted sheet feeding cassette is drawn or detached.