Stepwise Pressing Roller Intervals for Folded Sheet Alignment
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Solution Overview
Problem
Existing sheet processing devices struggle to maintain the alignment and accumulation of folded sheet bundles, as pressing operations often result in the bundle being opened due to overlapping folded positions and uniform pressing force, which fails to improve the aligning and accumulating properties effectively.
Innovation Solution
A sheet processing device with a support unit that reduces the intervals between pressing member pairs stepwise, allowing the folded sheet bundle to pass through and be pressed at multiple positions, directing fold lines inward to prevent opening during accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pressing operations are performed with uniform pressing force at overlapping folded positions, then the pressing operation can be simplified, but the folded sheet bundle opens due to lack of directional control on fold lines
Solution Approach 1:
The pressing members are arranged in multiple rows with different pressing forces applied at different locations. The first pressing members apply a first pressing force at a first location, while the second pressing members apply a second pressing force at a second location, creating non-uniform pressing distribution to direct fold lines inward and prevent opening
Solution Approach 2:
The pressing system is divided into multiple rows of pressing members (first pressing members and second pressing members) positioned at different locations. This segmentation allows independent control of pressing forces at different positions, enabling the fold lines to be directed inward effectively
2Reliability
If pressing members are arranged to press at multiple positions, then fold lines can be directed inward to prevent opening, but the device complexity increases
Solution Approach 1:
The pressing system is segmented into multiple rows of pressing members with different pressing forces. This segmentation enables pressing at multiple positions to direct fold lines inward, improving accumulation reliability while maintaining a structured, manageable complexity through systematic arrangement
3Ease of operation
If the same position is pressed repeatedly, then the pressing operation is simple, but the folded positions overlap in a straight line causing the bundle to open
Solution Approach 1:
Different pressing forces are applied at different locations to create varied local effects. The first pressing members apply a first pressing force at a first location, while the second pressing members apply a second pressing force at a second location, ensuring fold lines are directed inward and preventing the bundle from opening
Solution Approach 2:
The pressing operation transitions from a single-position approach to a multi-position approach by adding the dimension of location variation. Pressing members are arranged at different positions (first location and second location) to create fold lines that converge inward, changing the dimensional aspect of pressing from point-based to distributed spatial pressing
Data Source
AI summary
A sheet processing device can prevent a folded sheet bundle from being opened upon accumulation to prevent a reduction in accumulation amount thereof. The sheet processing device includes a pair of pressing rollers pressing a folding loop of a folded sheet bundle in a thickness direction, a support unit mounted to a device frame and supporting a plurality of rows of the pressing roller pairs such that intervals therebetween in the row direction are reduced stepwise, and a gripper member that makes the folding loop of the folded sheet bundle pass through the support unit in a direction that the intervals of the plurality of rows of pressing roller pairs in the row direction are reduced stepwise. The folded sheet bundle passes through the support unit by the gripper member to cause the folding loop to be sequentially pressed by the plurality of rows of pressing roller pairs.