Sheet Supply Device Warped Roll Adhesion Position Detection
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Solution Overview
Problem
Existing sheet supply devices face challenges in reliably joining sheets from warped rolls due to inaccurate detection of the outer diameter and pressing position, leading to inconsistent sheet joining.
Innovation Solution
A sheet supply device with a controller that includes an adhesion member detector, outer diameter detector, and pressing mechanism, which determines the adhesion member position and outer diameter of the second roll to accurately press the first roll against the second roll, ensuring reliable joining even when the second roll is warped.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the outer diameter of the second roll is measured before rotation using a conventional outer diameter detector, then the measurement process is simple, but the pressing position cannot be accurately specified when the roll is warped
Solution Approach 1:
The adhesion member position is detected in advance by rotating the second roll, and this detection result is stored and used later for accurate pressing position specification. This preliminary detection action resolves the contradiction by preparing position information before the actual joining operation.
Solution Approach 2:
The system uses the detected adhesion member position as feedback to control the rotation of the second roll, ensuring that the pressing position aligns accurately with the adhesion member. This feedback mechanism maintains measurement precision while managing system complexity through intelligent control.
2Measurement precision
If the second roll is rotated to detect adhesion member position, then accurate pressing position can be specified, but the detection process becomes more complex
Solution Approach 1:
The system combines the adhesion member position detection function with the existing outer diameter detection mechanism. By integrating these functions, the patent achieves accurate position detection without significantly increasing overall device complexity.
Solution Approach 2:
The second roll serves dual purposes: it is both the object being detected and the mechanism used for detection. By rotating the second roll itself to bring the adhesion member into the detection range, the system achieves accurate detection without requiring separate complex detection mechanisms.
3Reliability
If the pressing mechanism is controlled based on detected outer diameter and adhesion member position, then reliable sheet joining is achieved, but the control system becomes more complex
Solution Approach 1:
The control system uses feedback from the detected outer diameter and adhesion member position to automatically adjust the pressing mechanism. This feedback-based control ensures reliable sheet joining while managing complexity through automated decision-making algorithms.
Solution Approach 2:
The patent replaces manual or simple mechanical positioning with an automated control system that uses detection data to precisely control the pressing mechanism. This substitution of mechanical systems with intelligent control achieves higher reliability while keeping the overall system manageable.
Data Source
AI summary
A controller includes: an adhesion member position determination unit that determines a position of an adhesion member in a rotation direction of a roll on the basis of the result of detection from an adhesion member detector in a state in which the roll has been rotated by a shaft control unit; and an outer diameter determination unit that determines an outer diameter of the roll in a portion where the adhesion member is positioned, the determination being performed on the basis of the result of detection from an outer diameter detector in a state in which driving of shaft drive sources are controlled by the shaft control unit such that the adhesion member is positioned within a detection range of the outer diameter detector on the basis of the position of the adhesion member determined by the adhesion member position determination unit.