Sheet Conveying Apparatus Vertical Guide Interference
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Solution Overview
Problem
The challenge is to downsize a sheet conveying apparatus while ensuring sufficient moving space for the pickup roller to contact and separate from the sheet, as existing designs face interference issues with the conveyance guide during the pickup roller's movement, hindering both compactness and reliable operation.
Innovation Solution
A sheet conveying apparatus with a movement unit that includes a feeding member, a conveyance guide with an opening, and a stacking unit, allowing the feeding member to move between contact and non-contact positions with the sheet, ensuring the entry portion is within the opening, preventing interference with the conveyance guide and enabling compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pickup roller is moved from the first position to the second position to enable sheet feeding and separation, then the sheet feeding function is achieved, but the holder and link interfere with the conveyance guide in compact designs
Solution Approach 1:
The invention repositions the conveyance guide from a horizontal arrangement to a vertical arrangement above the pickup roller. This dimensional change allows the entry portion to be located within the opening of the conveyance guide when the pickup roller is in the second position, eliminating interference between the holder/link mechanism and the conveyance guide while maintaining sufficient moving space for reliable sheet feeding
2Length of stationary object
If the apparatus is downsized to reduce height, then compactness is improved, but the moving space for the pickup roller is insufficient causing interference with the conveyance guide
Solution Approach 1:
By arranging the conveyance guide vertically above the pickup roller instead of horizontally beside it, the invention enables compact apparatus height while providing adequate vertical movement space for the pickup roller between the first position (contacting sheet) and second position (above sheet), preventing interference with the conveyance guide
Solution Approach 2:
The entry portion of the holder is designed to be located within the opening of the conveyance guide when the pickup roller is in the second position. This nesting arrangement allows the holder to pass through the conveyance guide opening without interference, enabling compact design while maintaining sufficient movement space
Data Source
AI summary
A sheet conveying apparatus includes a stacking unit, a feeding member, a conveyance guide, and a movement unit. The stacking unit is drawably mounted on an apparatus body and includes a stacking member on which a sheet is stacked. The feeding member feeds the sheet stacked on the stacking member. The conveyance guide is provided with an opening and disposed above the stacking unit. The conveyance guide configures a conveyance path through which the sheet is conveyed. The movement unit moves the feeding member between a first position on which the feeding member comes into contact with the sheet stacked on the stacking member and a second position disposed above the first position. The movement unit includes an entry portion configured to be located within the opening in a state where the feeding member is positioned at the second position.