Document Transport Speed Control for Noise Reduction
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Solution Overview
Problem
Document transport devices often operate at speeds higher than image forming apparatuses, leading to noise generation and premature wear due to over-specification, when mounted with image forming apparatuses having lower image formation speeds.
Innovation Solution
A document transport device with a controller that adjusts the number of sheets transported per unit time and transport pattern based on instructions from the image forming apparatus to match the image formation speed, including transport speed, timing, and acceleration, ensuring documents are transported at speeds compatible with the image reading unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the document transport device operates at high document transport speed, then productivity is improved, but noise increases and component lifespan decreases
Solution Approach 1:
The document transport device dynamically adjusts its transport speed based on the image formation speed of the connected image forming apparatus. The controller receives information about the image formation speed and modifies the document transport speed accordingly, allowing the system to operate at optimal speeds rather than always at maximum capacity. This dynamic adjustment resolves the contradiction by enabling high-speed operation when needed while reducing speed to minimize noise when the image forming apparatus operates at lower speeds.
2Productivity
If the document transport device operates at high document transport speed, then productivity is improved, but component reliability deteriorates
Solution Approach 1:
The system implements dynamic speed adjustment where the document transport speed is adapted to match the image formation speed of the connected apparatus. This prevents the transport components from operating continuously at maximum speed, thereby reducing wear and extending component lifespan while still maintaining high productivity when the image forming apparatus can handle the higher speeds.
3Adaptability or versatility
If the document transport device is mounted with image forming apparatus having lower image formation speed, then adaptability is improved, but over-specification occurs leading to noise and premature wear
Solution Approach 1:
The document transport device changes its operational parameters (transport speed) based on the capabilities of the connected image forming apparatus. By receiving information about the image formation speed and adjusting the document transport speed accordingly, the system avoids over-specification issues while maintaining broad mounting compatibility. This parameter adaptation allows the same transport device to work efficiently with various image forming apparatus of different speed capabilities.
Data Source
AI summary
A document transport device includes a transport unit that transports documents one by one to a position where an image is read by an image reading unit and transports the document at a speed at which the image reading unit can read the image at the image reading position, and a controller that determines, based on an instruction from an image forming apparatus to which the document transport device is mounted, the number of sheets transported per unit time when plural documents are transported by the transport unit, and controls the transport unit to transport the documents at the determined number of sheets transported per unit time.