Transparent Conveying Guide for Roller Visibility
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Solution Overview
Problem
In image forming apparatuses, replacing rollers is challenging due to their hidden position behind the conveying guide, leading to difficulties in visual recognition and increased risk of sheet feeding failures.
Innovation Solution
The apparatus includes a conveying guide with a first guide member made of transparent material for easy visualization of the feed roller, allowing it to be slid and detached, while other guide members are non-transparent to minimize visibility interference, facilitating roller replacement and reducing feeding errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conveying guide is positioned close to the roller to prevent sheet feeding failures, then sheet feeding reliability is improved, but the roller becomes difficult to visually recognize for replacement
Solution Approach 1:
The conveying guide is made transparent or translucent, allowing light to pass through it. This enables the roller positioned behind the conveying guide to be visually recognized from the front, solving the visibility problem while maintaining the close positioning needed for reliable sheet feeding
Solution Approach 2:
The transparent conveying guide acts as an intermediary element that allows visual penetration. By being transparent, it mediates between the need for close positioning (for reliability) and the need for visibility (for maintenance), allowing users to see the roller through the guide itself
2Ease of repair
If the conveying guide is made transparent to improve roller visibility, then ease of maintenance is improved, but the guide structure becomes more complex
Solution Approach 1:
The conveying guide is divided into multiple guide members (first guide member, second guide member, third guide member). The first guide member is made transparent while the second and third guide members can be made of different materials, allowing selective transparency where needed while maintaining structural integrity
Solution Approach 2:
Only the first guide member, which is positioned to obstruct the view of the roller, is made transparent. The second and third guide members, which do not obstruct the view, can be made of conventional opaque materials. This localized application of transparency minimizes the complexity increase while achieving the visibility goal
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
This configuration enables easy visual recognition and replacement of rollers, reducing the likelihood of sheet feeding failures by enhancing visibility and accessibility during maintenance.
Implementation Method 1
formed of a material whose property of light transmittance of light having a wavelength of 360 nm to 420 nm is 80% or more
Data Source
AI summary
An image forming apparatus has: a cassette which stores a sheet; a pickup roller which picks up the sheet inside the cassette; a feed roller which feeds the sheet picked up by the pickup roller toward an image forming portion; and a retard roller which is pressed against the feed roller and forms a separation nip. In addition, the image forming apparatus has a conveying guide which guides the sheet picked up by the pickup roller to the separation nip. A first guide member of the conveying guide is configured to be slidable in a drawing direction when the feed roller is replaced, and the conveying guide is formed of a material whose property of light transmittance of light having a wavelength of 360 nm to 420 nm is 80% or more. The feed roller is detachable from the one end of a shaft in a state in which the cassette is drawn out along the rail and the conveying guide is slid in the drawing direction.