Rotatable Arm Sensor for Sheet Detection
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Solution Overview
Problem
Existing sheet feeding and printing apparatuses face issues with detecting the state of sheets on trays, leading to potential misloading and unnecessary resetting, which can result in suboptimal printing and extra work, and existing detection methods often require large and costly mechanisms.
Innovation Solution
A sheet feeding apparatus with a rotatable arm equipped with a roller and a sensor that detects the presence, type, orientation, and size of sheets on a tray, using a simple and compact configuration to determine the mounting state of the tray and the sheet, preventing misloading and optimizing printing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large-scale means is used to detect the state of the sheet on the tray, then the detection accuracy is improved, but the apparatus size is enlarged
Solution Approach 1:
The pickup roller unit is designed to perform multiple functions: it serves as both the sheet pickup mechanism and the detection mechanism. The sensor, roller, and arm structure are reused for both feeding sheets and detecting sheet state, tray mounting state, eliminating the need for separate large-scale detection equipment
Solution Approach 2:
The detection function is integrated into the existing pickup roller unit, allowing the system to self-detect sheet state without requiring external or additional specialized equipment. The pickup roller unit essentially serves itself by incorporating sensing capabilities into its existing structure
2Reliability
If a complex detection system is implemented to detect sheet state, then the reliability of printing operation is improved, but the device complexity increases
Solution Approach 1:
The pickup roller unit performs both sheet pickup and detection functions, reducing device complexity by eliminating the need for separate detection systems while maintaining reliable detection of sheet presence, tray mounting state, and other critical parameters
Solution Approach 2:
The sensor provides feedback about sheet state and tray mounting state to the control unit, enabling the system to detect potential issues early and take appropriate actions such as displaying error messages or preventing printing operations, thereby improving reliability through simple feedback mechanisms rather than complex control systems
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
Enables accurate detection of sheet states before printing, preventing misloading and ensuring optimal printing conditions while maintaining a compact and cost-effective apparatus design.
Implementation Method 1
a sensor, provided on the arm, configured to detect a physical property
Data Source
AI summary
A sheet feeding apparatus includes: a tray storing a sheet and detachably mounted on an apparatus body; a rotatable arm; a roller, provided on the arm, configured to pick up the sheet on the tray; a sensor, provided on the arm, configured to detect a physical property; and a determination unit configured to determine, based on detection by the sensor, at least any of a mounting state of the tray on the apparatus body and at least one of states of the sheet on the tray selected from the group consisting of the presence or absence of the sheet, a remaining amount of the sheet, a type of the sheet, front and back sides of the sheet, and a size of the sheet stored on the tray.