Automatic Document Feeder Stamp Device Positioning
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Solution Overview
Problem
Conventional automatic document feeders lack a simple configuration for determining the location of the stamp device, making it difficult to replace the printing unit without opening the apparatus, leading to cumbersome operations.
Innovation Solution
An automatic document feeder with a stamp device that can be moved between facing and retracted positions within the discharge path, allowing for external checking and easy replacement, and a mechanism to ensure accurate return to the operational position without opening the apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the stamp device is provided in a fixed position within the apparatus, then the printing unit can perform marking function, but it becomes difficult to check and replace the printing unit without opening the apparatus
Solution Approach 1:
The stamp device is made movable between a retracted position (where the printing unit can be accessed from outside) and a working position (where the printing unit faces the document conveyance path). This dynamic positioning allows the system to switch between maintenance mode and operation mode, resolving the contradiction between ease of replacement and functional capability.
2Ease of repair
If the stamp device is made movable to allow external access, then the printing unit can be easily checked and replaced, but the mechanism becomes more complex
Solution Approach 1:
The stamp device is equipped with a return mechanism that automatically returns the printing unit to its working position facing the document conveyance path after it has been moved to the retracted position for replacement. This self-service feature reduces the need for manual intervention and complex control systems, simplifying the overall mechanism while maintaining ease of repair.
3Reliability
If the printing unit is always positioned to face the document, then marking function is ensured, but external checking and replacement becomes difficult
Solution Approach 1:
The stamp device transitions between two fixed positions: a working position where the printing unit faces the document for reliable marking, and a retracted position where the printing unit is accessible from outside for easy replacement. The dynamic nature of this positioning system allows the system to optimize for either reliability or ease of operation depending on the operational phase.
Data Source
AI summary
An automatic document feeder includes a sheet feeding tray on which a document is stacked; a slit glass on which the document is scanned while moving; a discharge path in which the document is conveyed after the document is scanned; a document discharge unit to which the document is discharged through the discharge path; and a stamp device that makes a mark on a scanned surface of the document being in the discharge path. The stamp device includes a printing unit that faces the scanned surface of the document. The printing unit is movable between a first position at which the printing unit faces the document being in the discharge path and a second position at which the printing unit is retracted from the discharge path.