Rotatable Door Unit Alignment for Image Formers
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Solution Overview
Problem
Image forming apparatuses face challenges in maintaining space efficiency while allowing for easy maintenance and replacement of internal units, as detachable units often lack positional accuracy and fixed units are cumbersome to attach and remove.
Innovation Solution
The apparatus features a rotatable part with a support member and biasing member to facilitate horizontal movement and attachment/removal of units, including a transport unit with registration rollers, ensuring easy maintenance and high positional accuracy by using handles and a locking claw for precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the unit on the door is made easily attachable and detachable, then the ease of maintenance is improved, but the positional accuracy deteriorates
Solution Approach 1:
The support member is designed to be movable relative to the rotatable part, allowing dynamic adjustment during attachment. The movable support member enables the unit to be attached at multiple positions, and the optimal positional accuracy is achieved through this dynamic adjustment capability rather than fixed positioning.
Solution Approach 2:
The attachment system is divided into separate functional components: the rotatable part, the support member, and the unit. This segmentation allows the support member to be independently adjusted and positioned, facilitating both easy attachment and high positional accuracy without requiring complex integrated fixing mechanisms.
2Manufacturing precision
If the unit is fixed by screws for high positional accuracy, then the manufacturing precision is improved, but the ease of operation deteriorates due to tool requirements
Solution Approach 1:
The screw-based mechanical fastening system is replaced with a movable support member system that achieves fixation through elastic force and geometric constraints. This substitution eliminates the need for tools while maintaining high positional accuracy through the support member's ability to be precisely positioned and secured without threaded fasteners.
Solution Approach 2:
The support member structure enables self-positioning and self-fixation of the unit. The elastic force from the biasing member automatically secures the unit once positioned, and the movable nature allows the support member to self-adjust during attachment, eliminating the need for external tool intervention.
3Ease of repair
If the unit on the door is made detachable, then the ease of maintenance is improved, but the device complexity increases
Solution Approach 1:
The movable support member serves multiple functions: it supports the unit, enables easy attachment and detachment, provides positional adjustment, and secures the unit through elastic force. This multi-functionality reduces the need for separate components for each function, thereby limiting the increase in device complexity while achieving ease of maintenance.
4Area of stationary object
If the second unit is attached to the rotatable part, then the space efficiency is improved, but the ease of maintenance deteriorates when the first unit needs replacement
Solution Approach 1:
The system is segmented into the rotatable part containing the second unit and the main apparatus body containing the first unit. This segmentation allows the second unit to occupy space on the rotatable part during normal operation, but the first unit can be independently accessed and removed from the main body without requiring removal of the second unit, as they are separated by the rotatable part's geometry.
Solution Approach 2:
The rotatable part provides dynamic spatial arrangement. When in the closed position, the second unit on the rotatable part occupies compact space. When opened, the geometry of the rotatable part creates clearance that allows the first unit to be removed from the main body without contact with the second unit, thus maintaining space efficiency while enabling maintenance.
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
This configuration allows for effortless removal and reattachment of units without contact, enhancing maintenance efficiency and preventing paper jams, while ensuring accurate positioning and easy resolution of paper jams.
Implementation Method 1
a biasing member that constantly exerts an elastic force on the second unit in the direction away from the rotatable part
Implementation Method 2
a locking claw slidably movable between an engaging position for engaging a locking portion of the second unit and a disengaging position for releasing the engagement
Data Source
AI summary
An image forming apparatus is disclosed. The image forming apparatus includes an apparatus main body, a first unit to be attached inside the apparatus main body, a rotatable part attached to the apparatus main body and rotatable between an open position for opening the apparatus main body and a closed position for closing the apparatus main body, and a second unit removably attached to the rotatable part. When the rotatable part is rotated from the closed position to the open position, the first unit is allowed to be attached to or removed from the apparatus main body by being moved horizontally. By removing the second unit from the rotatable part, the first unit is attached to or removed from the apparatus main body without coming into contact with the second unit.