Document Loading Tray Prepositioning for Faster Reading
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Solution Overview
Problem
Document conveying devices require a long time to start reading original documents due to the need to move the document loading tray from a lower limit position to an upper limit position, which interferes with user operations and reduces convenience.
Innovation Solution
A document conveying device with a control device that moves the loading tray to a standby position after a predetermined waiting time from document detection, allowing the tray to be positioned closer to the upper limit, reducing the time to start reading by minimizing interference with user operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the document loading tray is moved from the lower limit position to the upper limit position to start reading, then the document reading can be initiated, but the time required to move the tray is long and interferes with user operations
Solution Approach 1:
The control device moves the document loading tray to a standby position (located between the upper limit position and lower limit position) after a predetermined waiting time from when a sheet is detected, rather than waiting until the upper limit position is reached. This preliminary positioning reduces the distance the tray needs to travel when reading is actually initiated, thereby reducing the overall time loss while still allowing user operations to proceed.
2Ease of operation
If the document loading tray stays at the lower limit position, then user operations are not interfered with, but the time to move the tray to the upper limit position for reading is excessively long
Solution Approach 1:
The tray is preliminarily moved to a standby position that is closer to the upper limit position than the lower limit position, but not so close as to interfere with user operations. This intermediate positioning strikes a balance between reducing movement time and maintaining ease of user operation.
Solution Approach 2:
The system dynamically adjusts the tray position based on operational needs. The tray can be at the lower limit position during user operations, then move to a standby position after a waiting period, and finally move to the upper limit position when reading is initiated. This dynamic positioning optimizes both operation convenience and time efficiency.
Data Source
AI summary
A document conveying device includes an operation device, a document loading tray, a document detection sensor, a document ejection tray, a feed roller, a document conveying mechanism, an elevating mechanism, and a controller. Upon passage of a first waiting time from when the document detection sensor has detected any sheet of original document on the document loading tray, the controller allows the elevating mechanism to move the document loading tray to a standby position between upper and lower limit positions and stop the tray at the standby position. Upon acceptance of an instruction to read original document through the operation device, the controller allows the feed roller to feed a sheet of original document on the document loading tray, allows the document conveying mechanism to convey the fed sheet to a reading position, and allows the elevating mechanism to move up the document loading tray to the upper limit position.