Separation Roller Clutch Friction Control for Multi-Feed Prevention
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Solution Overview
Problem
Existing medium conveying apparatuses face challenges in efficiently switching between separation and non-separation modes due to inadequate clutch mechanisms, leading to inefficiencies and potential multi-feed issues during sheet feeding.
Innovation Solution
The apparatus incorporates a mechanical clutch with a driving wheel and a driven wheel, where a frictional force applied by an applying part exceeds the friction between the wheels, allowing precise coupling and uncoupling to manage the transmission of driving force to the separation roller, enhancing mode switching and preventing multi-feed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an electromagnetic clutch is used to switch between separation and non-separation modes, then the clutch can be turned on and off to control the retard roller, but the switching efficiency is insufficient and multi-feed issues occur
Solution Approach 1:
The patent replaces the electromagnetic clutch with a mechanical clutch system consisting of a driving wheel, driven wheel, and applying part. This mechanical substitution eliminates the inefficiencies of electromagnetic actuation, providing immediate and reliable engagement/disengagement of the separation roller through direct mechanical contact and friction-based locking, thereby preventing multi-feed occurrences.
2Force
If the frictional force between driving wheel and driven wheel is insufficient, then the driving force transmission is weak, but the clutch cannot properly restrict rotation for mode switching
Solution Approach 1:
The patent applies a localized frictional force through the applying part that acts specifically on the driven wheel. This creating a localized high-friction zone allows the clutch to precisely control the driven wheel's rotation without affecting the overall driving force transmission capability of the mechanical clutch system.
Solution Approach 2:
The patent utilizes frictional force as a controllable parameter to achieve precise clutch operation. By designing the applying part to generate a frictional force greater than the friction between the driving and driven wheels, the system can dynamically control the engagement state of the clutch, enabling reliable mode switching between separation and non-separation operations.
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
This solution enables seamless switching between separation and non-separation modes, reducing multi-feed occurrences and improving operational efficiency in conveying various media types.
Implementation Method 1
The applying part applies, to the driven wheel, a frictional force for restricting rotation of the driven wheel rotated by the driving wheel
Data Source
AI summary
A medium conveying apparatus includes a driving source to generate a driving force, a separation roller to separate a medium with the driving force, a mechanical clutch, and an applying part. The mechanical clutch includes a driving wheel rotated by the driving force from the driving source, and a driven wheel coupled to and uncoupled from the driving wheel by rotation of the driving wheel. The driven wheel coupled to the driving wheel transmits the driving force from the driving wheel to the separation roller. The applying part applies, to the driven wheel, a frictional force for restricting rotation of the driven wheel rotated by the driving wheel, and the frictional force applied by the applying part is greater than a frictional force between the driving wheel and the driven wheel.