Transfer Device Cam Link Member Protection
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Solution Overview
Problem
Conventional transfer devices face issues with link members coming off during mode transitions in image forming apparatuses, leading to unstable toner image transfer due to increased rotatory torque and clutch capacity deficiencies.
Innovation Solution
A transfer device with an eccentric cam and link members that includes coming-off protection sections on the cam sections for monochrome and color, preventing link member disengagement by eliminating the need for a coming-off protection section on the color cam section, thus maintaining stable rotatory torque and clutch capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coming-off protection sections are provided on both cam sections for monochrome and color, then link member disengagement is prevented, but rotatory torque increases and clutch capacity becomes insufficient
Solution Approach 1:
The invention extracts the coming-off protection section from the color cam section and relocates it to the monochrome cam section. This allows the link member for color to be prevented from coming off through the monochrome cam section's protection section, thereby preventing link member disengagement while avoiding the increase in rotatory torque and clutch capacity deficiencies that would result from adding protection sections to both cam sections.
2Adaptability or versatility
If link members are allowed to move freely during mode transitions, then operational flexibility is maintained, but link members may come off leading to unstable toner image transfer
Solution Approach 1:
The invention applies preliminary anti-action by providing coming-off protection sections on the cam sections before link member disengagement can occur. The protection sections are positioned to prevent the link members from coming off during mode transitions, thereby maintaining operational flexibility while preventing the harmful effect of link member disengagement and ensuring stable toner image transfer.
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
Prevents link member disengagement and maintains stable toner image transfer across different operational modes, suppressing rotatory torque increases and clutch capacity deficiencies.
Implementation Method 1
a cam formed in an eccentric cam made up of a cam section for monochrome and a cam section for color that are to be turned around an identical cam shaft
Data Source
AI summary
An image forming apparatus prevents link members for monochrome and for color from coming off while suppressing an increase in rotatory torque and a deficiency of clutch capacity for transmitting a driving force to a cam shaft. Coming-off protection sections for preventing the coming off of a second link member which is the link member for color is provided in a cam section for monochrome. In other words, it is not necessary to provide a coming-off protection section in a second cam section which is a cam section for color requiring a large rotatory torque. This eliminates the need for a coming-off protection section of the cam section for color to act on the link member for color when a cam is turned by a driving source.