Sheet Takeout Device with Dynamic Separation Roller
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Solution Overview
Problem
Conventional sheet takeout devices often damage thin or inflexible sheets due to applied separation forces, leading to bending or destruction, and fail to stably separate sheets in a stacked state for individual conveyance.
Innovation Solution
A sheet takeout device comprising a takeout section, a conveying section, a detection section, and a separation section with a separation roller that applies an opposite-direction separation force only to second and following sheets after the first sheet is transferred to the conveying section, ensuring stable separation and conveyance of stacked sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separation force is applied to all sheets under the same conditions, then sheets can be separated, but thin and inflexible sheets may be bent or cut
Solution Approach 1:
The separation roller dynamically changes its rotation direction based on detection signals. When multiple sheets are detected, it rotates in the opposite direction to apply separation force. When one sheet is detected, it rotates in the conveying direction to avoid damage. This dynamic adaptation resolves the contradiction between reliable separation and sheet protection.
Solution Approach 2:
The system changes the rotation direction parameter of the separation roller based on the number of sheets detected. By switching between forward and reverse rotation, the separation force direction changes, allowing effective separation of multiple sheets while protecting single thin sheets from damage.
2Reliability
If a separation force in the opposite direction is applied while a conveying force is applied to thin and inflexible sheets, then separation may occur, but the sheets may be bent or cut
Solution Approach 1:
The separation roller's rotation direction is dynamically controlled based on sheet detection. When thin sheets are conveyed individually, the roller rotates in the conveying direction to maintain structural integrity. When multiple sheets need separation, it reverses to apply separation force, resolving the contradiction between separation effectiveness and sheet strength.
3Reliability
If a separation force is applied to a thin sealed letter made of vinyl, then separation may occur, but the letter may be destroyed because of interaction with the feed roller
Solution Approach 1:
The system changes the rotation parameter of the separation roller based on detection. For thin vinyl letters, when only one sheet is detected, the roller rotates in the conveying direction rather than applying opposite-direction separation force, preventing destruction while maintaining separation capability when needed.
4Object-affected harmful factors
If the separation roller is always rotated in the conveying direction, then sheet damage is reduced, but sheets taken out in a stacked state cannot be separated
Solution Approach 1:
The separation roller dynamically switches rotation direction based on real-time sheet detection. When sheets are conveyed individually, it rotates in the conveying direction to prevent damage. When multiple sheets are detected in a stacked state, it reverses to apply separation force, resolving the contradiction between damage prevention and separation reliability.
5Reliability
If the separation roller rotates in the opposite direction to separate stacked sheets, then separation is achieved, but thin sheets may be damaged by the strong separation force
Solution Approach 1:
The system changes the rotation direction parameter of the separation roller based on the number of sheets detected. By switching between forward and reverse rotation modes, it achieves effective separation of stacked sheets while protecting thin sheets from damage through conditional parameter adjustment.
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
The device effectively prevents sheet damage by applying separation force only after the first sheet is conveyed, allowing for stable separation and conveyance of even thin or inflexible sheets, ensuring reliable individual handling of stacked sheets.
Implementation Method 1
a separation section that includes a separation roller and is disposed on a side opposite to the takeout section across a conveying path between the takeout section and the conveying section, the separation section configured to apply an opposite-direction separation force
Implementation Method 2
a takeout section rotated in contact with a sheet to take out the sheet in a surface direction
Implementation Method 3
a conveying section configured to hold the sheet taken out by the takeout section and to further convey the sheet
Data Source
Figure 1
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Figure 3
AI summary
A sheet takeout device includes a takeout belt (6) brought into contact with a sheet set in a takeout position to generate negative pressure to adsorb the sheet, and traveled in a direction of an arrow T, and a separation roller (26) which separates second and following sheets associatively taken out with the sheet. Triggered by detection of its leading end at a second sensor (25), an opposite-direction separation force is applied to the sheet (P) to be conveyed via the separation roller (26).