Image Forming Apparatus Tension Control During Door Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In image forming apparatuses, opening or shutting a door for maintenance can cause tension release in the recording medium, leading to position deviations during image forming, resulting in potential misalignment or waste of the recording medium.
Innovation Solution
An image forming apparatus with a control unit that regulates the opening-shutting door operation while maintaining tension on the recording medium, ensuring it remains taut during worker access, using a motor to manage roller rotations and an opening-shutting regulation unit to prevent premature door opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the opening-shutting door is provided for worker access, then ease of operation is improved, but position stability of the recording medium deteriorates due to tension release
Solution Approach 1:
The control unit performs a preparation operation before releasing door regulation, which includes stopping the recording medium transport and maintaining tension application. This preliminary action ensures the recording medium is in a stable state before the door can be opened, preventing position deviation during worker access.
Solution Approach 2:
The control unit monitors the state of the recording medium and adjusts the door regulation accordingly. When the medium is stopped and tension is maintained, the regulation is released allowing door opening. This feedback mechanism ensures the door can be opened only when conditions are safe, maintaining both accessibility and stability.
2Ease of operation
If transport operation is stopped for door opening, then ease of operation is improved, but tension of the recording medium deteriorates causing position deviation
Solution Approach 1:
Before releasing the door regulation, the control unit executes a preparation operation that includes stopping the transport operation and ensuring tension continues to be applied to the recording medium. This preliminary setup allows the door to be opened without causing tension loss or position deviation.
Solution Approach 2:
The system dynamically adjusts the door regulation state based on the transport and tension state. The regulation is released only when the medium is stopped and tension is maintained, allowing flexible door operation while preserving the critical tension force needed for medium stability.
3Manufacturing precision
If tension is applied to the recording medium during transport, then manufacturing precision is improved, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The control unit performs multiple functions: it controls transport operation, maintains tension application, regulates door opening, and coordinates the preparation operation. By consolidating these functions into a single control unit, the system achieves precise tension control without proportionally increasing overall device complexity.
Solution Approach 2:
The control unit merges the door regulation function with the transport and tension control functions. The preparation operation integrates stopping the transport, maintaining tension, and releasing door regulation into a coordinated sequence, reducing the need for separate independent control mechanisms.
Data Source
AI summary
An image forming apparatus includes a first roller and a second roller on which a recording medium is stretched; a head which performs image forming on the recording medium in an image forming region between the first roller and the second roller; an opening-shutting door which is provided in an external member; an opening-shutting regulation unit which regulates an opening operation of the opening-shutting door; and a control unit which transports the recording medium while applying a tension to the recording medium in the image forming region by controlling rotations of the first and second rollers, and regulates the opening operation of the opening-shutting door by the opening-shutting regulation unit while the head is performing the image forming, in which the control unit releases a regulation of the opening operation of the opening-shutting door by the opening-shutting regulation unit after performing a preparation operation for releasing the regulation which stops the recording medium in a state in which the tension is applied to the recording medium in the image forming region by controlling the rotations of the first and second rollers.