Post-processing Device Paper Piece Transport Speed Control
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Solution Overview
Problem
Post-processing devices face issues with maintaining the shape of cut sheets due to low stiffness or small slit widths, leading to scuffing on the cut face during transportation, which degrades product quality.
Innovation Solution
A post-processing device with a sheet transporting section and a paper piece transporting section, where the transporting speed of the paper piece section is set lower than the sheet transporting section, and a control section adjusts this speed based on sheet stiffness, type, grain direction, thickness, and cut width to ensure parallel transport and reduce scuffing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the transporting speed of the paper piece transporting section is set to the same speed as the sheet transporting section, then the efficiency of material transport is improved, but the shape of the paper piece is not maintained and scuffing occurs on the cut face
Solution Approach 1:
The patent applies parameter changes by differentiating the transporting speeds between the sheet transporting section and the paper piece transporting section. Specifically, the paper piece transporting section operates at a lower speed than the sheet transporting section, which prevents the paper piece from being pulled away from the cut face and maintains its shape, thereby eliminating scuffing while preserving transport efficiency
2Manufacturing precision
If the stiffness of the cut sheet is low or the slit width is small, then the cutting precision is improved, but the paper piece deforms and proceeds in a direction away from the sheet being transported
Solution Approach 1:
The patent addresses shape stability by adjusting the transporting speed parameter of the paper piece transporting section to be lower than that of the sheet transporting section. This speed differential compensates for the low stiffness or small slit width conditions, preventing the paper piece from deforming and deviating from its transport path while maintaining cutting precision
3Ease of operation
If the cut sheet is fed and transported from an oblique direction, then the transportation flexibility is improved, but a force is applied in a direction away from the cut sheet causing scuffing on the cut face
Solution Approach 1:
The patent eliminates scuffing by changing the speed parameter of the paper piece transporting section to operate at a lower speed than the sheet transporting section. This speed differential counteracts the oblique transportation forces, preventing the paper piece from being pulled away from the cut face and thereby eliminating scuffing while preserving transportation flexibility
Data Source
AI summary
A post-processing device includes a sheet transporting section that transports one or more sheets, a cutting section that cuts the sheet along a transporting direction of the sheet being transported by the sheet transporting section and a paper piece transporting section that transports a paper piece cut by the cutting section, and a transporting speed of the paper piece transporting section is set lower than a transporting speed of the sheet transporting section.