Sheet Folding Apparatus Pushing Member Guide
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Solution Overview
Problem
Existing sheet folding apparatuses, such as those disclosed in JP 2002-068583 A and JP 2008-207924 A, suffer from inconsistent sheet folding positions due to sheet warping, leading to variations in the folding line positions and a degraded appearance of folded sheets.
Innovation Solution
The apparatus incorporates transport rollers, folding rollers, and a pushing member with a guide section to stabilize the sheet, ensuring consistent folding by guiding the sheet precisely to the folding rollers, reducing positional changes and slipping during the folding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a small roller is used to push the sheet onto the folding roller, then the sheet can be moved to the folding position, but the sheet warps at the downstream side causing inconsistent folding positions
Solution Approach 1:
A pushing member is introduced as an intermediary device between the sheet feeding mechanism and the folding roller. This pushing member directly pushes the sheet onto the folding roller without using a small roller that causes warping, thereby maintaining both operational capability and folding precision
Solution Approach 2:
The problematic small roller that causes sheet warping is removed from the system. Instead, a dedicated pushing member is used to perform the sheet advancement function, eliminating the warping issue while maintaining the ability to move sheets to the folding position
2Productivity
If the sheet is pressed onto the folding roller via the front-edge part, then the sheet can be folded, but the sheet slips on the next sheet causing folding position changes
Solution Approach 1:
The pushing member acts as an intermediary that advances the sheet to the folding position without relying on friction-based pressing that causes slipping. This maintains folding capability while eliminating position inconsistency
Solution Approach 2:
The sheet is preliminarily positioned and advanced by the pushing member before the folding action occurs. This preliminary positioning ensures the sheet is correctly placed on the folding roller, preventing slipping during the folding operation
Data Source
AI summary
Disclosed herein is a sheet-folding apparatus which includes transporting rollers, folding rollers, a pushing member provided between the transporting rollers and the folding-rollers, and a guide unit for guiding the sheet to the folding-roller pair by using the pushing member.