Medium Conveying Device Anti-Multi-Feed Control via Regulating Guide
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Solution Overview
Problem
Existing medium conveying apparatuses face challenges in preventing multi-feed of media during the feeding process, leading to inefficiencies and potential jamming issues.
Innovation Solution
A medium conveying apparatus with a feed roller, a separation roller, and a regulating guide that moves between two positions to control the contact between the rollers, ensuring the feed roller feeds the medium only after the separation roller contacts it, thereby preventing multi-feed by sequencing the rotation of the rollers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the feed roller rotates before the separation roller contacts the medium, then the feeding process can start promptly, but multi-feed of media occurs
Solution Approach 1:
The separation roller is activated to contact the medium before the feed roller begins rotation. This preliminary action ensures the separation roller is ready to prevent multi-feed before the feeding process starts, resolving the contradiction by preparing the anti-multi-feed mechanism in advance without delaying the overall feeding speed
Solution Approach 2:
The system dynamically adjusts the rotation timing of the feed roller and separation roller based on real-time conditions. The feed roller rotation is controlled to start only after detecting that the separation roller has properly contacted the medium, creating a dynamic coordination that prevents multi-feed while maintaining efficient feeding speed
2Reliability
If the separation roller contacts the medium before the feed roller feeds it, then multi-feed is prevented, but the feeding process is delayed
Solution Approach 1:
The separation roller performs its medium-contacting action in advance, before the feed roller begins rotation. This preliminary positioning prevents multi-feed without creating significant delay, as the separation roller's preparation is a quick action that doesn't bottleneck the overall feeding process
Solution Approach 2:
The system rapidly transitions the separation roller into contact with the medium and immediately follows with feed roller rotation. By rushing through the separation contact phase without unnecessary delays, the system minimizes time loss while ensuring anti-multi-feed performance is achieved
3Productivity
If the feed roller and separation roller rotate simultaneously, then the feeding process is efficient, but medium separation is insufficient
Solution Approach 1:
The feeding process is segmented into distinct phases: first the separation roller contacts and separates the medium from the stack, then the feed roller rotates to feed the separated medium. This temporal segmentation ensures proper medium separation while maintaining overall feeding efficiency, as each roller performs its specific function in the correct sequence
Data Source
AI summary
A medium conveying apparatus includes a feed roller to feed a medium, a separation roller located to face the feed roller, a regulating guide provided to be movable between a first position where contact of the medium with the feed roller and the separation roller is regulated and a second position where contact of the medium with the feed roller and the separation roller is not regulated, and a processor to control the feed roller, the separation roller, and the regulating guide. When feeding of a medium is started, the processor controls the feed roller, the separation roller, and the regulating guide such that the feed roller feeds the medium after the regulating guide moves from the first position toward the second position and the separation roller contacts the medium.