Automatic Document Feeder Side-View Inspection and Jam Clearance
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Solution Overview
Problem
Conventional automatic document feeders pose difficulties for operators in low postures, such as those in wheelchairs, to visually check and clear paper jams due to the need to look from an oblique position above the image forming apparatus.
Innovation Solution
The automatic document feeder design includes a front plate with an extended outer edge along the first transport path, allowing visual inspection from the side, and a posture change mechanism that widens the transport paths for easy jam clearance, enabling operators in low postures to check and remove jams without obstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the feeder cover is opened to allow visual inspection of the transport path, then the operator can check for paper jams, but the operator must be in a high position above the apparatus which excludes operators in wheelchairs
Solution Approach 1:
The patent changes the viewing dimension from top-down (requiring operator to be above the apparatus) to side-view (allowing operator to be at the same level as the apparatus). The front plate is designed with an opening or transparent portion that allows visual inspection of the transport path from the front side, enabling operators in wheelchairs to check for paper jams without needing to position themselves above the apparatus.
2Reliability
If the transport path is enclosed to protect internal components, then the device structure is compact and protected, but the operator cannot visually check document jams from the front
Solution Approach 1:
The front plate is designed with a localized opening or transparent portion at the specific location where visual inspection is needed, while the rest of the feeder cover remains closed to protect internal components. This allows the operator to view the transport path through the opening without compromising the overall enclosed structure and component protection.
Solution Approach 2:
A transparent plate or window is used as an intermediary element that allows light and visual inspection while maintaining the physical barrier and protection of the enclosed structure. The transparent portion acts as a mediator between the need for component protection and the need for visual accessibility.
Data Source
AI summary
An automatic document feeder (3) has a front plate (12) located on one of opposite sides of the document feeder in a direction orthogonal to a feeding direction of documents P on a document tray (4), and on the side opposed to an operator. A rear plate (13) is on the other side opposed to the front plate (12). An intermediate transport unit (32) located between the front plate (12) and the rear plate (13) has a frame with an outer wall surface (37) serving as a lower guide surface of document transport path. The front plate (12) has an outer edge (33) at a height equal to or lower than the outer wall surface (37), so as to allow the operator to visually check the document (P) on the outer wall surface (37) from the direction orthogonal to the feeding direction of the documents (P).