Sheet Folding Apparatus Guide Member for Accurate Second Fold
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Solution Overview
Problem
Conventional sheet folding apparatuses face challenges in achieving accurate second folding due to sheet slack, leading to fluctuations in the fold position, despite using stoppers and roller pairs to regulate the sheet.
Innovation Solution
The apparatus employs a guide member and stopper member to ensure the sheet is not slack after striking the stopper, guiding it to a precise nip position for second folding, using a folding processing passage with specific path configurations and mechanisms to maintain stability and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a stopper is used to regulate the sheet front end for second folding, then the sheet position is controlled, but the sheet becomes slack between the stopper and folding roller pair, causing fold position fluctuations
Solution Approach 1:
A guide member is introduced as an intermediary component between the stopper and the folding roller pair. This guide member prevents the sheet from becoming slack by guiding it along a controlled path, thereby maintaining sheet stability while preserving the position control function of the stopper. The guide member acts as a mediator that resolves the contradiction between position regulation and sheet stability.
Solution Approach 2:
The guide member extends in the sheet width direction (perpendicular to the transport direction), creating a new dimensional constraint. This additional dimensional control prevents the sheet from deviating or becoming slack in the transport direction, thereby stabilizing the sheet without interfering with the stopper's position regulation function.
2Ease of operation
If the distance between the stopper and folding roller pair is increased to allow sheet regulation, then the sheet can be properly positioned, but the sheet becomes slack and unstable
Solution Approach 1:
The guide member serves as an intermediary structure that spans the distance between the stopper and folding roller pair. It provides continuous guidance along this distance, preventing the sheet from becoming slack or unstable while still allowing sufficient space for the stopper to regulate the sheet position before folding.
3Extent of automation
If break means and sensor are used to halt the sheet downstream, then a loop can be formed for folding, but the sheet remains unstable in the transport path
Solution Approach 1:
The guide member acts as an intermediary structure that stabilizes the sheet throughout the automated loop formation process. It provides continuous guidance from the stopper through the folding roller pair, preventing the sheet from becoming unstable during the automated operations of the sensor and break means.
Data Source
AI summary
A sheet folding apparatus for forming first folding and second folding in a sheet enables the sheet to be folded in an accurate fold position in second folding, when the front end of the sheet which is first folded in a nip position of a first folding roller pair and transported strikes a stopper member, a guide member guides a fold to undergo second folding of the first-folded sheet to a nip position of a second folding roller pair, and second folding is formed.