Feeding Roller Drive Disconnection for Manual Cleaning
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Solution Overview
Problem
Existing printing apparatuses, such as described in Japanese Patent No. 3871323, do not allow for manual rotation of the feeding roller in the standby state, making it difficult to clean the surface of the feeding roller and separation roller using a damp cloth.
Innovation Solution
A printing apparatus with a control unit that shuts off the transmission of driving force between the driving source and the feeding roller, allowing the feeding roller and separation roller to abut each other, enabling manual rotation and cleaning with a damp cloth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the feeding roller is kept in a driven state during standby, then the separation feeding mechanism maintains readiness for operation, but manual rotation of the feeding roller becomes impossible, making cleaning difficult
Solution Approach 1:
The patent applies dynamics by enabling the feeding roller to switch between two operational states: a driven state during normal operation where the roller is connected to the drive source, and a manual rotation state during standby where the connection is disconnected. This dynamic state change allows the system to adapt between maintaining operational readiness and enabling manual cleaning operations.
Solution Approach 2:
The control unit performs preliminary action by automatically disconnecting the drive connection before manual cleaning is needed. This preliminary disconnection prepares the feeding roller for manual rotation and cleaning operations, eliminating the need for operators to force-rotate a driven roller and ensuring safe, easy access for maintenance.
2Speed
If the drive connection remains engaged during standby, then the feeding roller maintains driving force for immediate operation, but the surface cleaning of feeding roller and separation roller becomes inaccessible
Solution Approach 1:
The system dynamically adjusts the drive connection state based on operational requirements. During standby, the connection is disconnected to enable cleaning access. When printing operations resume, the connection is re-established, allowing the system to adapt between maintenance accessibility and operational speed requirements.
Solution Approach 2:
The control unit automatically manages the drive connection state without requiring manual intervention. The system self-adjusts between connected and disconnected states based on whether cleaning or operation is needed, reducing the complexity of manual switching mechanisms and ensuring consistent state management.
Data Source
AI summary
A printing apparatus, in which it is possible to easily clean the surface of a feeding roller and a separation roller by using a damp cloth or the like, includes a feeding roller that feeds a printing medium; a separation roller capable of selectively taking a state where a separating force that separates a plurality of printing media conveyed by the feeding roller one by one has occurred and a state where the separating force has not occurred at a position at which the separation roller is in pressure contact with the feeding roller; and a control unit configured to perform control to bring about a standby state where transmission of a driving force between a driving source of the feeding roller and the feeding roller is shut off in a state where the separating force has not occurred and the feeding roller and the separation roller abut each other.