Paper Roll Feed Detection Using Sensor-Roller Support
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Solution Overview
Problem
Existing paper feeding devices struggle with accurately detecting the leading end of a paper roll and distinguishing between the presence or absence of a paper roll, often leading to inefficiencies and potential paper jams due to improper insertion or absence of the roll.
Innovation Solution
A paper feeding device with a support member that includes a leading-end detection sensor and a roller, both positioned to contact the paper roll's surface, and a controller to determine the presence or absence of the leading end based on sensor signals, using a spool with recessed or raised portions to facilitate accurate detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a leading-end detection sensor is used to detect the leading end of the paper roll, then the detection capability is improved, but the device complexity increases and false detection may occur when the paper roll is not properly inserted
Solution Approach 1:
A roller is introduced as an intermediary component between the paper roll and the leading-end detection sensor. The roller contacts the paper roll surface and transmits positional information to the sensor, enabling accurate detection of the leading end position and presence of the paper roll without requiring direct complex sensor-paper roll interaction
Solution Approach 2:
The system uses feedback from the leading-end detection sensor to determine both the leading end position and the presence of the paper roll. The sensor signals are processed to provide feedback information that confirms proper insertion before initiating paper feeding operations, preventing false detection issues
2Adaptability or versatility
If the spool rotates in reverse direction to feed paper, then the paper feeding flexibility is improved, but the risk of paper jams and improper insertion increases
Solution Approach 1:
The system performs preliminary detection of the paper roll presence and leading end position before initiating rotation in either direction. The leading-end detection sensor and roller work together to confirm proper insertion and positioning, ensuring the paper roll is correctly placed before the spool rotates in the feeding or reverse direction, thereby preventing paper jams
Data Source
AI summary
A paper feeding device includes: a bearing base to which a spool inserted into a paper roll, around which a paper is wound, is detachably attachable; a support including: a leading-end detection sensor to detect a leading end of the paper on the paper roll and output a sensor signal; and a roller disposed at a position in the support different from the leading-end detection sensor in a circumferential direction of the paper roll, to cause the leading-end detection sensor and the roller to contact a surface of the paper roll attached to the bearing base; and to cause the leading-end detection sensor and the roller to be directed toward an axial center of the spool; and a motor to rotate the spool in a feeding direction to feed the paper and in a reverse direction opposite to the feeding direction.