Image Reading Apparatus Presser Prevents Document Jamming
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Solution Overview
Problem
Image reading apparatuses with U-shaped transport paths often have issues where the downstream end of the discharged original document can enter the supplying port due to its layout, causing document misalignment and potential jamming.
Innovation Solution
The apparatus includes an original document support portion to guide the document to the supplying port, an inverting unit to flip the document, a reading unit to scan before inversion, a discharging unit to place the document, and a presser to correct the document's posture at the downstream end, preventing it from entering the supplying port.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a U-shaped transport path is used to invert the original document, then the document can be discharged with inverted front and back, but the downstream end of the discharged document may enter the supplying port due to the compact layout
Solution Approach 1:
A guide member is introduced as an intermediary component between the discharge location and the supplying port. This guide member actively directs the downstream end of the discharged document away from the supplying port, preventing potential jamming while maintaining the compact U-shaped transport path configuration that enables document inversion.
Solution Approach 2:
The guide member is positioned to preemptively counteract the natural tendency of the document's downstream end to enter the supplying port. By providing a guiding surface or structure before the document reaches the supplying port area, the system prevents the harmful action (document entering supplying port) before it can occur.
2Area of stationary object
If the placement portion is positioned close to the supplying port to save space, then the apparatus layout is more compact, but the discharged document may misalign and enter the supplying port
Solution Approach 1:
The guide member serves as a mediating structure that enables the placement portion to be positioned close to the supplying port without compromising document alignment. It provides a physical guide that ensures the document is directed away from the supplying port during discharge, allowing compact layout while maintaining proper document orientation.
Solution Approach 2:
The guide member provides localized guidance only at the critical area where document alignment is needed near the supplying port. This localized intervention allows the rest of the placement portion to maintain compact positioning while ensuring proper document discharge alignment at the specific location where misalignment would cause problems.
Data Source
AI summary
A scanner includes the following. A paper support guides an original document to a supplying port. An inverting unit inverts a front and a back of the original document fed through the supplying port. A reading unit reads the original document before being inverted. A discharging unit discharges the original document after being inverted. A portion of the original document is placed on a placement plate. A pressing unit presses the original document toward the placement plate at least at a downstream end portion in a discharging direction of the original document on the placement plate.