Paper Dust Removal Roller Segmentation for Durability
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Solution Overview
Problem
Conventional sheet conveying devices suffer from reduced durability and increased running costs due to mineral powder dust accumulating and damaging the paper dust removal rollers, particularly at the edges of sheets during cutting.
Innovation Solution
Incorporating a paper dust removal system with a paper dust removal roller that covers the sheet's width and uses both a sponge member and raking blades to remove dust, ensuring effective dust removal without damaging the roller surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only a sponge is used to wipe paper dust from the paper dust removal roller, then the structure is simple, but mineral powder dust accumulates in wedge form and damages the roller surface, reducing durability
Solution Approach 1:
The dust removal function is segmented into two distinct mechanisms: a sponge member for removing fiber-based paper dust from the sheet surface, and a blade member for removing mineral powder dust from the roller surface. This segmentation allows each component to specialize in removing specific types of dust, preventing mineral powder accumulation that damages the roller while maintaining structural efficiency
Solution Approach 2:
The blade member acts as an intermediary between the mineral powder dust and the roller surface, mechanically scraping off the accumulated dust before it can embed and damage the roller. This intermediary mechanism protects the roller surface without requiring complete redesign of the dust removal system
2Productivity
If the paper dust removal roller covers the entire sheet width to remove dust effectively, then dust removal efficiency improves, but mineral powder dust accumulates more at the edges, increasing roller damage
Solution Approach 1:
Different regions of the dust removal system are assigned different functions: the sponge member contacts the sheet surface to remove fiber dust, while the blade member contacts the roller surface at the edges to remove mineral powder dust. This local differentiation allows the system to handle different dust types at different locations, maintaining high dust removal efficiency while protecting the roller from edge accumulation damage
3Reliability
If mineral powder dust is removed from the sheet, then sheet quality improves, but the dust accumulates on the roller and damages it
Solution Approach 1:
The blade member converts the harmful accumulation of mineral powder dust into a beneficial scraping action. By positioning the blade to contact the roller surface, the system uses the presence of mineral powder dust as the very mechanism to clean the roller, transforming what was previously a damaging accumulation into a controlled removal process that extends roller service life
Data Source
AI summary
A sheet conveying device includes: a conveyance unit that conveys a sheet along a sheet conveying path; a paper dust removal roller that is provided in the sheet conveying path to cover a range that is longer than a width of the sheet, the paper dust removal roller removing paper dust that is adhered to the sheet by rotating as the sheet is conveyed; a first dust removing member that contacts with a first portion of the paper dust removal roller where contacts with edges of the sheet, and removes paper dust that is adhered to a surface of the paper dust removal roller; and a second dust removing member that contacts with a second portion of the paper dust removal roller where contacts with a surface of the sheet, and remove paper dust that is adhered to the surface of the paper dust removal roller.