Sheet Conveying Guide Member Wear Resistance
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Solution Overview
Problem
Existing sheet conveying apparatus guide members made of elastic bodies, such as PET resin film, suffer from wear and tear due to the passing sheets, leading to potential sheet tearing and misconveyance issues.
Innovation Solution
A sheet conveying apparatus with a guide member comprising a combination of an elastic member and a rigid member, where the elastic member is fixed to one of the conveying guides and the rigid member is positioned on the sheet-passing face, providing enhanced wear resistance and flexibility to guide sheets without causing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a guide member is made of an elastic body (thin film member) to provide flexibility and strength of stiffness, then the guide member can guide sheets effectively, but the guide member itself gets worn out by the passing sheets leading to sharpening of bent portions and potential sheet tearing
Solution Approach 1:
The guide member is constructed as a composite structure combining an elastic body (thin film member) with a protective coating layer having higher wear resistance than the elastic body. This composite structure allows the guide member to maintain the flexibility and elastic properties of the thin film member while the protective coating prevents wear and damage from passing sheets, thereby resolving the contradiction between strength of stiffness and wear resistance
2Ease of operation
If the guide member has a bent portion convex with respect to the sheet passing face to guide sheets, then sheet guidance is achieved, but the bent portion gets worn out and sharpened by repeated sheet passing
Solution Approach 1:
The protective coating is applied specifically to the bent portion and other areas of the guide member that come into contact with passing sheets. This localized protection ensures that the critical guidance surfaces have enhanced wear resistance while maintaining the overall elastic properties of the guide member, preventing the sharpening of bent portions and ensuring long-term reliable sheet guidance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces wear and tear on the guide member, preventing sheet tearing and ensuring accurate sheet conveyance, even with repeated use, while maintaining the necessary stiffness for sheet handling.
Implementation Method 1
the elastic member is deformed by pressing of the conveyed sheet when the sheet passes through the guide portion
Data Source
AI summary
A sheet conveying apparatus includes: a first conveying guide that has a first conveying face of a conveying path; a second conveying guide that has a second conveying face opposed to the first conveying face; and a guide portion that is provided at any one of the first conveying guide and the second conveying guide, the guide portion has an elastic member that is fixed to one of the first conveying guide and the second conveying guide, and a rigid member that is provided on the face side of the elastic member on which the sheet passes and that has a surface more rigid than that of the elastic member, and the elastic member is deformed by pressing of the conveyed sheet when the sheet passes through the guide portion.