Reinforce Roller Sub-rollers for Sheet Fold Line Quality
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Solution Overview
Problem
Existing sheet folding apparatuses struggle to form excellent fold lines in thick sheet bundles without damaging the edges, especially when high pressure is required, leading to undesirable phenomena such as the reinforce roller stopping or damaging the edges.
Innovation Solution
A sheet folding apparatus with a reinforce roller that includes multiple sub-rollers concentrically coupled along the rotation axis, applying different pressures to the fold line, allowing for stepwise pressure application to reinforce the fold line without damaging the sheet bundle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pressure of the reinforce roller is increased to obtain an excellent fold line in thick sheet bundles, then the fold line quality is improved, but the reinforce roller stops at the edge of the sheet bundle or damages the edge
Solution Approach 1:
The reinforce roller is divided into multiple sub-rollers (first sub-roller, second sub-roller, etc.) arranged along the rotation axis direction. Each sub-roller applies pressure to different portions of the fold line, enabling the system to handle both thick sheet bundles and edge areas with appropriate pressure distribution, thus preventing edge damage while maintaining fold line quality.
Solution Approach 2:
Different sub-rollers are configured to apply different pressures to different locations of the fold line. The first sub-roller applies higher pressure to the central fold line area for excellent folding, while the second sub-roller applies lower pressure to areas near the edges, preventing edge damage while still reinforcing the fold line.
2Manufacturing precision
If the pressure of the reinforce roller is increased to reinforce the fold line in thick sheet bundles, then the fold line reinforcement is improved, but an un-neglectable impact sound occurs when the reinforce roller climbs over the edge of the sheet bundle
Solution Approach 1:
The reinforce roller is segmented into multiple sub-rollers that contact the sheet bundle at different positions. This segmentation distributes the impact forces that occur when climbing over edges, reducing the magnitude of individual impacts and thereby reducing impact sound while maintaining effective fold line reinforcement.
3Manufacturing precision
If a single reinforce roller is used to apply high pressure to the fold line, then the fold line quality is improved, but the device complexity increases when multiple sub-rollers are added
Solution Approach 1:
Multiple sub-rollers are combined into a single integrated reinforce roller assembly that rotates together as one unit. This merging approach maintains the benefits of multiple pressure application points while simplifying the drive mechanism and reducing overall structural complexity compared to using separate rollers.
Solution Approach 2:
The multi-sub-roller reinforce roller assembly serves multiple functions simultaneously: it reinforces the fold line, prevents edge damage, reduces impact sound, and can accommodate variations in sheet bundle thickness. This multi-functionality justifies the increased structural complexity by delivering comprehensive performance improvements.
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
The apparatus effectively forms excellent fold lines in thick sheet bundles without damaging the edges, as the stepwise pressure application ensures the reinforce roller can climb over the edges without causing harm, maintaining the integrity of the sheet bundle.
Implementation Method 1
the respective sub-rollers apply different pressures to the fold line
Data Source
AI summary
A sheet folding apparatus includes a fold unit which folds a center of a sheet bundle to form a fold line, and a reinforce roller which moves along the fold line while applying pressure to the fold line to reinforce the fold line. The reinforce roller includes plural sub-rollers which are concentrically coupled to each other in a rotation axis direction, and the respective sub-rollers apply different pressures to the fold line.