Clutchless Transport Unit Document Bundle Separation Control
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Solution Overview
Problem
Image reading apparatuses with clutchless document transport units face challenges in separating and reading documents from subsequent bundles correctly, leading to improper reading processes and document jams when subsequent documents are pulled into the feeder before the preceding bundle is fully processed.
Innovation Solution
An image reading apparatus equipped with a transport unit, a reader, and a controller that detects the presence of subsequent documents and actuates the transport unit to ensure all documents from the first bundle are output before processing the second bundle, employing first and second control methods to manage document positioning and prevent jams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a clutchless transport unit is used to simplify the structure, then device complexity is reduced, but the ability to separate and process document bundles independently is lost, causing subsequent documents to be pulled into the feeder
Solution Approach 1:
The detector detects the presence of subsequent document bundles in advance before they cause problems. The controller receives this detection signal and actuates the transport unit to complete processing of the current bundle before allowing the next bundle to be fed, preventing document mixing at the source
Solution Approach 2:
A detector is installed to detect whether a subsequent document bundle is present in the feeder. This detection signal is fed back to the controller, which then adjusts the transport unit operation accordingly, creating a closed-loop control system that prevents document bundle mixing
2Productivity
If the transport unit continues operating without interruption, then productivity is maintained, but documents from subsequent bundles may be pulled in and cause improper reading
Solution Approach 1:
The detector preliminarily detects the presence of subsequent document bundles before they interfere with the reading process. This early detection allows the controller to adjust transport operation in advance, ensuring reading accuracy is not compromised while minimizing interruptions to productivity
Solution Approach 2:
The detection signal from the detector provides real-time feedback to the controller about subsequent document bundle presence. This feedback enables the controller to dynamically adjust transport unit operation to maintain both productivity and reading accuracy
3Manufacturing precision
If the transport unit is stopped to prevent document mixing, then reading accuracy is improved, but processing time increases and productivity decreases
Solution Approach 1:
By detecting subsequent document bundles in advance, the system can plan and execute transport unit actuation to complete current bundle processing without sudden stops, reducing time loss while maintaining reading accuracy
Solution Approach 2:
Real-time detection feedback enables the controller to make informed decisions about when to actuate the transport unit, optimizing the balance between maintaining reading accuracy and minimizing processing time interruptions
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
Ensures proper reading of documents in the preceding bundle even when subsequent documents are pulled in, preventing jams and reducing user workload by completing the reading process without requiring re-processing of the preceding bundle.
Implementation Method 1
light is radiated from a light source disposed on a document transport path, and reflected light from the document is received by an image sensor, so that the image on the document is read
Data Source
AI summary
An image reading apparatus includes a transport unit, a reader, a detector, and a controller. The transport unit transports a document. The reader reads the transported document. The detector detects whether or not a document bundle prior to being transported is present. While a document in a first document bundle corresponding to a first job is being transported, if the detector detects that a document in a second document bundle corresponding to a second job as a subsequent job is loaded, the controller actuates the transport unit until all documents in the first document bundle are output.