Cylindrical Document Feed for Stable Image Reading in Tight Spaces
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Solution Overview
Problem
Existing image reading devices require a large operation region due to documents being inserted in a vertical posture, leading to instability and the need for user support, especially for long sheets like A3 size.
Innovation Solution
The device incorporates a tubular-shaped housing with a cylindrical document setting section where documents are wound in a cylindrical shape, utilizing rotational forces to guide the leading edge into a transport path, reducing the operation region by eliminating the need for a separate document setting area and stabilizing the document posture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If documents are inserted in a vertical posture into the inlet, then the document can be taken into the housing, but the operation region becomes large and the document posture becomes unstable
Solution Approach 1:
The patent changes the document insertion dimension from vertical (upright) to horizontal (flat), allowing the document to be inserted along the width of the housing rather than requiring vertical space. This dimensional change reduces the operation region while maintaining ease of document insertion and handling
2Productivity
If documents are inserted in a vertical posture, then the document can be processed, but the document posture becomes unstable and user support is required
Solution Approach 1:
By changing the insertion orientation from vertical to horizontal, the document lies flat on the transport path throughout processing. This eliminates the cantilever state and gravitational instability, maintaining consistent document posture without requiring user support, thereby improving both productivity and stability
Data Source
AI summary
An image reading device includes a tubular-shaped housing, a cylindrical document setting section that is arranged in the housing and on which a document wound in a cylindrical shape is set, an document leading edge inlet into which a leading edge of the document in a rotation direction enters when the document set in the document setting section receives rotational forces RL and RR and rotates, a transport path that is arranged in the housing and along which the document that has entered the document leading edge inlet is transported in a transport direction F by receiving a transport force Cf, a reading section configured to read the image of the document transported along the transport path, and a discharge section to which the document read by the reading section is discharged.