Image Forming Apparatus Side Regulating Members
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Solution Overview
Problem
Conventional electro-photographic image forming apparatuses face challenges in preventing sheet deviation and paste adhesion when using roll sheets, leading to image failures, as existing methods either fail to maintain sufficient deviation prevention or result in paste adhering to side regulating members.
Innovation Solution
The apparatus employs a configuration with fixed first side regulating members and rotatable second side regulating members along the sheet conveyance path, allowing for differential tension application to prevent sheet deviation and minimize paste adhesion, particularly by using a plurality of roller members to manage tension and sliding interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the roll sheet is conveyed while causing an edge part to contact a fixed side regulating member to prevent deviation, then deviation prevention capability is improved, but paste adhesion to the side regulating member occurs due to sliding
Solution Approach 1:
The patent changes the fixed side regulating member to a rotatable side regulating member. This dynamic change allows the regulating member to rotate with the sheet edge during conveyance, eliminating sliding friction that causes paste adhesion while maintaining deviation prevention capability through controlled rotation.
Solution Approach 2:
The patent introduces a rotatable mechanism that changes the interaction parameter between the side regulating member and sheet edge from static contact to dynamic rotation. This parameter change reduces friction and prevents paste adhesion while maintaining sheet alignment.
2Object-generated harmful factors
If tension applied to the roll sheet is reduced to suppress paste adhesion, then paste adhesion is suppressed, but deviation prevention capability becomes insufficient
Solution Approach 1:
By making the side regulating member rotatable rather than fixed, the system maintains effective deviation prevention through dynamic adjustment while reducing the tension required to prevent paste adhesion, as the rotation mechanism eliminates sliding friction.
3Stability of the object's composition
If a fixed side regulating member is used to prevent sheet deviation, then deviation prevention is achieved, but the sheet edge slides causing paste to attach to the regulating member
Solution Approach 1:
The patent transforms the fixed regulating member into a rotatable one, converting the sliding friction problem into a rolling contact system. This dynamic change eliminates the harmful sliding effect while maintaining sheet alignment control.
Data Source
AI summary
Provided is an image forming apparatus capable of obtaining a high deviation prevention capability while suppressing adhesion of paste to a side regulating member.A plurality of roller members, for example, an upstream side roller member 91 and a downstream side roller member 92 are disposed along a sheet conveyance direction in which a recording sheet is conveyed. Then, first side regulating members 94A and 94B are provided at both end parts of the upstream side roller member 91 in a fixed state, and also second side regulating members 95A and 95B are provided at both end parts of the downstream side roller member 92 in a rotatable state. The first side regulating members 94A and 94B and the second side regulating members 95A and 95B regulate the deviation of a roll sheet S by the contact with the edge parts of the roll sheet S.