Sheet Conveying Device Judging Unit for Jam Prevention
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Solution Overview
Problem
Conventional sheet-conveying devices often experience paper jams when trying to convey sheets wider than the opening, as they cannot pass through the opening without becoming jammed.
Innovation Solution
A sheet-conveying apparatus with a judging unit that determines whether a sheet can pass through the conveyance opening, switching to an alternative path if the sheet is too wide or skewed, preventing jams by avoiding collisions with the opening edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the reading device conveys all originals to the opening, then the conveying function is improved, but paper jams occur when originals are wider than the opening
Solution Approach 1:
The judging unit performs preliminary assessment of the original width before conveyance to the opening. By measuring the original dimensions in advance and comparing them with the opening width, the system determines whether the original can pass through safely, preventing paper jams before they occur.
Solution Approach 2:
The system implements a feedback mechanism where the judging unit continuously monitors original dimensions and provides information to the conveying control. Based on this feedback, the conveying unit adjusts its operation to either convey the original to the opening or redirect it to an alternative path, ensuring reliable operation.
2Device complexity
If the reading device has a fixed opening width, then the device structure is simplified, but it cannot accommodate originals of varying widths
Solution Approach 1:
The discharge path is segmented into multiple routes: a first discharge path leading to the opening for originals that fit through, and a second discharge path for originals that are too wide. This segmentation allows the device to handle various original widths while maintaining a simple fixed opening structure.
Solution Approach 2:
The system adds a dimensional aspect to the discharge path by creating multiple discharge paths (first and second paths) instead of a single path. This allows originals of different widths to be routed appropriately, enhancing adaptability without modifying the opening itself.
Data Source
AI summary
A sheet conveying apparatus includes: a sheet placing part; a conveying part; an apparatus wall; and a judging unit. The sheet placing part is configured to receive a sheet placed thereon. The conveying part is configured to convey the sheet from the sheet placing part. The apparatus wall defines a first conveyance opening. The judging unit is configured to judge whether the sheet is able to pass the first conveyance opening. The conveying part conveys the sheet to the first conveyance opening if the judging unit determines that the sheet is able to pass through the first conveyance opening. The conveying part does not convey the sheet to the first conveyance opening if the judging unit determines that the sheet is unable to pass through the first conveyance opening.