Conveyance Member Position Control for Image Forming Device
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Solution Overview
Problem
In image forming devices, the stability of conveying a recording medium to a fixing device is compromised by variations in the stiffness of the medium, leading to unstable entry into the fixing nip and resulting blurs, especially when different types of paper are used.
Innovation Solution
An image forming device with a controller that variably controls the position of a conveyance member, utilizing detectors for stiffness, temperature, humidity, and distance to adjust the conveyance member's height and position, ensuring stable alignment and smooth entry into the fixing nip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed conveyance member position is used, then the device structure is simple, but the conveyance position becomes unstable when recording medium stiffness varies
Solution Approach 1:
The conveyance member position is made dynamically adjustable rather than fixed. The controller varies the position of the conveyance member according to detected stiffness values, allowing the system to adapt to different recording medium types and maintain stable conveyance.
Solution Approach 2:
The position parameter of the conveyance member is changed based on stiffness detection. By adjusting this physical parameter in response to varying recording medium properties, the system maintains optimal conveyance conditions across different paper types.
2Reliability
If the conveyance member position is optimized for one type of recording medium, then conveyance is stable for that medium, but becomes unstable when a different stiffness medium is used
Solution Approach 1:
The system uses stiffness detection to provide feedback about the recording medium properties. This feedback enables the controller to automatically adjust the conveyance member position, ensuring stable conveyance across different paper types without manual intervention.
Solution Approach 2:
The conveyance member position control system is designed to handle multiple types of recording media with different stiffness values. By making the position adjustable rather than fixed, a single system configuration can universally accommodate various paper types.
3Device complexity
If no stiffness detection is implemented, then the device structure is simple, but conveyance position stability cannot be maintained across different medium types
Solution Approach 1:
Stiffness detection provides essential feedback about the recording medium properties. This information feeds into the control system, enabling automatic adjustment of the conveyance member position to maintain stable conveyance for each specific medium type.
Solution Approach 2:
The system automatically detects stiffness and adjusts conveyance parameters without requiring manual intervention or pre-programming for each paper type. The detection and adjustment process is self-service, with the system adapting to whatever medium is loaded.
Data Source
AI summary
An image forming device includes an image carrier, a transfer member, a fixing device, a conveyance member, and a controller. The transfer member forms a transfer nip that transfers an image carried on the image carrier to a recording medium. The fixing device fixes the image on the recording medium. The conveyance member is located downstream of the transfer member in a conveyance direction of the recording medium and feeds the recording medium to the fixing device. The controller variably controls position of the conveyance member.