Medium Feed Lift Sensing for Bound Sheet Damage Prevention
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Solution Overview
Problem
Medium conveying apparatuses face issues with damaging bound media when separating stacked media due to staples or similar bindings, necessitating effective abnormality control to detect and prevent such conditions.
Innovation Solution
The apparatus employs lift sensors and detection sensors to determine if a medium is bound by detecting lifts and tilts, using a processor to execute abnormality control based on sensor data, ensuring accurate identification and prevention of damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the apparatus uses lift sensors to detect bound media, then the detection accuracy improves, but the device complexity increases
Solution Approach 1:
The lift detection function is segmented into two separate lift sensors positioned at different locations (one on each side of the conveyance path). Each sensor independently detects lift on its respective side, allowing the system to achieve comprehensive detection accuracy while maintaining modular complexity. The segmentation of detection locations enables precise identification of bound media without requiring a single complex sensor system.
2Reliability
If the apparatus detects oblique movement to identify bound media, then the reliability of abnormality control improves, but the difficulty of detecting and measuring increases
Solution Approach 1:
The system transitions from detecting only horizontal position to detecting three-dimensional lift movement. By adding vertical dimension detection through lift sensors, the system can identify bound media through oblique movement patterns that combine horizontal displacement with vertical lift. This dimensional expansion simplifies the detection logic by creating a distinctive three-dimensional signature for bound media that is easier to recognize and measure reliably.
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
Effectively identifies and prevents damage to bound media by accurately detecting lifts and tilts, thereby enhancing the reliability and safety of medium conveyance.
Implementation Method 1
a first lift sensor located on a downstream side of an upstream edge of a nip width of the pick roller and on one side of the pick roller toward a conveying direction of the medium, to detect a lift of the medium
Data Source
AI summary
A medium conveying apparatus includes a pick roller, a first lift sensor located on one side of the pick roller, a second lift sensor located on another side of the pick roller, a first detection sensor located on a same side as the first lift sensor, a second detection sensor located on a same side as the second lift sensor, and a processor to determine whether the medium is a predetermined medium, based on a detection result of a lift of the medium by the first or second lift sensor and to execute abnormality control when the medium is determined to be the predetermined medium, wherein the processor makes it difficult for the medium to be determined as a predetermined medium when it is detected that the first detection sensor side of the medium precedes the second detection sensor side.