Sheet Folder Roller Coordination for Versatile Precision Folding
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Solution Overview
Problem
Existing sheet folders struggle to efficiently fold sheets into predetermined shapes with precision and flexibility, particularly in image forming apparatuses, due to limitations in folding mechanisms and guide adjustments.
Innovation Solution
A sheet folder incorporating a conveyor, a pair of folding rollers, a third folding roller, and movable guides controlled by a motor to form multiple nips and guide postures, allowing for flexible folding operations such as Z-fold, letter fold-out, or half-fold, with enhanced control over sheet direction and folding positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional folding mechanism is used, then the structure is simple, but the folding precision and versatility are insufficient
Solution Approach 1:
The patent employs movable guides that can dynamically adjust their positions and orientations to accommodate different folding operations. The guides transition from static to dynamic configurations, enabling precise control over sheet positioning during various folding modes (Z-fold, letter fold-out, half-fold) while maintaining operational flexibility
Solution Approach 2:
The folding mechanism is divided into multiple independent components: conveyor system, multiple folding rollers (first, second, third), and separate movable guides. This segmentation allows each component to be optimized independently for its specific function while collectively achieving high folding precision through coordinated operation
2Adaptability or versatility
If fixed guides are used, then the structure is simple, but the adaptability to different folding operations is limited
Solution Approach 1:
The guides are designed with movable components that can adjust their positions and orientations dynamically. This dynamic capability enables the same guide system to adapt to multiple folding operations (Z-fold, letter fold-out, half-fold) by reconfiguring during different operational modes, thereby achieving high versatility without requiring entirely separate guide systems for each folding type
Solution Approach 2:
The movable guides serve multiple functions across different folding operations. By enabling the guides to reposition and reorient themselves, a single guide system performs the roles that would traditionally require multiple fixed guide systems, achieving universality while managing complexity through integrated control
3Adaptability or versatility
If multiple folding rollers are added, then the folding versatility improves, but the device complexity increases
Solution Approach 1:
The folding system is segmented into three distinct folding rollers, each responsible for specific folding operations. This segmentation allows the complex task of achieving multiple folding shapes to be divided into manageable sub-tasks performed by individual rollers, making the overall complex system more controllable and maintainable while achieving high versatility
Solution Approach 2:
Multiple folding rollers are merged into a single integrated system that works in coordination with the conveyor and movable guides. Rather than operating as separate independent systems, the rollers are combined into a unified folding mechanism that achieves versatile folding capabilities through their coordinated interaction within the overall system architecture
Data Source
AI summary
A sheet folder includes a conveyor conveying a sheet, a first folding roller and a second folding roller that form a first nip, a third folding roller forming a second nip with the second folding roller, a first guide movable between a first guide posture and a first retracted posture, a second guide movable between a second guide posture and a second retracted posture, and a motor. The motor rotates the second folding roller forward to convey the sheet toward the first nip, reverse to convey the sheet toward the second nip, moves the first guide to arrange in the first guide in the first guide posture or the first retracted posture, and moves the second guide to arrange the second guide in the second guide posture or the second retracted posture.