Intermediate Transfer Unit Grip Access Without Housing Deformation

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Solution Overview

Problem

Existing intermediate transfer units in image forming apparatuses lack efficient mechanisms for handling and maintenance, particularly in terms of ease of removal and protection of electrical components during servicing, which can lead to deformation or damage.

Innovation Solution

The intermediate transfer unit incorporates a housing with high rigidity, a grip on a downstream plate orthogonal to the pull-out direction, and a cover with a hole for accessing the grip, allowing safe and deformation-free removal of the unit while protecting electrical components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the intermediate transfer unit is designed with a removable structure for easy maintenance, then the ease of operation is improved, but the housing may deform during removal and reattachment

Engineering Contradiction:

Improveease of removalVSAvoidhousing deformation

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

Positioning holes are provided in advance at specific locations on the housing to guide the insertion and alignment of positioning pins during assembly, ensuring proper positioning before fastening occurs

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Positioning pins are inserted into positioning holes before fastening to pre-establish accurate alignment between the intermediate transfer unit and apparatus body, preventing deformation during the fastening process

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Ease of repair

If electrical components are exposed for easy access during maintenance, then the ease of repair is improved, but the risk of damage to electrical components increases

Engineering Contradiction:

Improveaccess to electrical componentsVSAvoiddamage risk

Core Design Contradiction:

Ease of repairVSObject-affected harmful factors

Solution Approach 1:

The cover is divided into a first cover portion and a second cover portion that can be separated from each other, allowing selective access to different areas including electrical components while maintaining protection for other areas

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The separable cover structure acts as an intermediary that provides controlled access to electrical components through the first cover portion while the second cover portion maintains protection, reducing direct exposure risk

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If the grip is positioned on the downstream plate for easy pulling, then the ease of operation is improved, but the grip may be inaccessible without removing the cover

Engineering Contradiction:

Improvegrip accessibilityVSAvoidcover structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The cover is segmented into two separable portions, allowing the first cover portion to be removed for grip access while the second cover portion remains attached, simplifying the access process

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first cover portion is extracted or removed separately from the second cover portion to provide access to the grip on the downstream plate, eliminating the need to remove the entire cover

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12498664B2Intermediate transfer unit and image forming apparatus

Publication Date: 2025.12.16 RICOH CO LTD

AI summary

An intermediate transfer unit includes an intermediate transfer belt, a housing, a grip, and a cover. The housing supports a plurality of stretching rollers stretching the intermediate transfer belt and has a downstream plate in a pull-out direction of the intermediate transfer unit. The downstream plate is orthogonal to the pull-out direction. The grip is on the downstream plate. The cover covers the downstream plate and has a hole to access the grip.