Transfer Unit Access Layout With Movable Door Holder
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Solution Overview
Problem
Existing image forming apparatuses face challenges in downsizing while maintaining good workability for attaching and detaching detachable units due to structural constraints imposed by straps that restrict the attachment-and-detachment trajectory of intermediate transfer units.
Innovation Solution
The image forming apparatus incorporates a movable holding member and a guide member that can shift between overlapping and non-overlapping positions with the attachment-and-detachment trajectory of detachable units, allowing for the units to be attached and detached without interference, and a guide member that can be retracted from the trajectory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the holding member is disposed outside the attachment-and-detachment trajectory of the intermediate transfer unit, then the attachment and detachment of the intermediate transfer unit is not restricted, but the image forming apparatus cannot be downsized
Solution Approach 1:
The holding member is designed to be movable between a first position where it overlaps with the attachment-and-detachment trajectory of the intermediate transfer unit, and a second position where it does not overlap. This dynamic repositioning allows the holding member to alternately provide structural support and clear the attachment path, resolving the contradiction between maintaining apparatus compactness and ensuring easy unit replacement
Solution Approach 2:
The holding member moves along the opening-closing direction (perpendicular to the attachment-and-detachment trajectory), transitioning from overlapping to non-overlapping positions. This dimensional movement allows the same component to serve different spatial functions at different times, enabling both downsizing and easy operation
2Reliability
If the guide member is attached to the door, then the sheet can be guided when the door is closed, but the guide member overlaps with the attachment-and-detachment trajectory when the door is open
Solution Approach 1:
The guide member is detachably attached to the door, allowing it to be attached when sheet guidance is needed (door closed) and detached when unit replacement is needed (door open). This dynamic attachment state enables the guide member to alternately provide sheet guidance and clear the attachment trajectory, resolving the contradiction between reliability and ease of operation
Solution Approach 2:
The guide member is separated from the door structure and made as a detachable component. This segmentation allows the guide member to be independently attached or detached based on operational requirements, enabling flexible switching between sheet guidance mode and unit replacement mode
Data Source
AI summary
An image forming apparatus includes an apparatus body including an opening portion, an detachable unit, a door, and a holding member including a first end portion connected to the apparatus body and a second end portion connected to the door, the holding member being configured to move together with the door and to hold the door positioned at the open position. The holding member is movable from a first position to a second position in a state where the door is positioned at the open position, the first position being a position at which the holding member overlaps with an attachment-and-detachment trajectory of the detachable unit, the second position being a position at which the holding member does not overlap with the attachment-and-detachment trajectory of the detachable unit and allows the detachable unit to be attached to and detached from the apparatus body.