Sheet Feeding Apparatus Air Separation Alignment Control
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Solution Overview
Problem
In image forming apparatuses, the air separation technique for sheet feeding often fails to maintain sheet posture due to misalignment of side edge regulation plates, leading to sheet skew and jamming, especially when handling sheets with high adhesion forces like coated paper.
Innovation Solution
A sheet feeding apparatus with a supporting portion, a sheet feeding unit, side edge regulation plates, a detection unit for regulating plate positions, and a control unit that stops the air-blow operation if the side edge regulation plates are not properly aligned with the sheet width, preventing sheet skew and jamming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air separation is performed to levitate and separate sheets with high adhesion force, then sheet separation is improved, but sheet posture stability deteriorates due to misalignment of side edge regulation plates
Solution Approach 1:
The control unit checks the position of the side edge regulation plates before initiating the air-blow operation. By performing this alignment verification in advance, the system ensures that the regulation plates are properly positioned to support the sheet width before the sheet is levitated, thereby maintaining sheet posture stability during the separation process.
Solution Approach 2:
The regulation plate position detection unit continuously monitors the position of the side edge regulation plates and provides feedback to the control unit. This feedback mechanism allows the system to detect any misalignment and respond by stopping the air-blow operation, thus preventing sheet posture disruption while maintaining reliable sheet separation when alignment is correct.
2Adaptability or versatility
If side edge regulation plates are moved to accommodate different sheet sizes, then adaptability is improved, but alignment precision with sheet width deteriorates
Solution Approach 1:
The regulation plate position detection unit provides continuous feedback on the position of the side edge regulation plates. This feedback allows the system to verify whether the plates are properly aligned with the sheet width after being moved to accommodate different sheet sizes, ensuring that adaptability does not compromise alignment precision.
Solution Approach 2:
The side edge regulation plates are designed to be movable to accommodate different sheet sizes, providing dynamic adaptability. However, the system incorporates a verification mechanism that ensures the plates are positioned correctly before air separation, maintaining precision despite the dynamic adjustment capability.
3Productivity
If air-blow operation is performed without position verification, then feeding speed is improved, but sheet skew and jamming increase
Solution Approach 1:
The control unit performs a preliminary check of the side edge regulation plate positions before initiating the air-blow operation. This preliminary verification step ensures that the plates are properly aligned with the sheet width, preventing sheet skew and jamming while minimizing the impact on feeding speed through efficient control logic.
Solution Approach 2:
The system uses feedback from the regulation plate position detection unit to determine whether to proceed with the air-blow operation. This feedback-based control ensures that air separation is only performed when alignment conditions are met, maintaining feeding reliability without significantly compromising productivity through intelligent decision-making.
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 solution effectively prevents sheet skew and jamming by ensuring accurate alignment of side edge regulation plates with the sheet width, ensuring smooth feeding of sheets with high adhesion forces, such as coated paper.
Implementation Method 1
a separation unit configured to separate the sheets by blowing air onto the plurality of sheets supported by the supporting portion
Data Source
AI summary
A sheet feeding apparatus includes a supporting portion, a sheet feeding unit, a side edge regulation plate, a separation unit configured to separate the sheets by blowing air onto the plurality of sheets supported by the supporting portion, a regulation plate position detection unit configured to detect a position of the side edge regulation plates in the width direction, and a control unit configured to execute a separation mode so as to perform an air-blow operation by the separation unit in feeding the sheets by the sheet feeding unit. In the separation mode, in a case where the position of the side edge regulation plate detected by the regulation plate position detection unit does not correspond to size of the sheets supported by the supporting portion in the width direction, the control unit is configured to stop the air-blow operation.