Roller Holder Nip Pressure Adjustment Mechanism
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Solution Overview
Problem
Conventional image recording apparatuses with conveying rollers face challenges in efficiently managing sheet jams and require significant power to move large spur holders, leading to increased size and energy consumption.
Innovation Solution
A conveying apparatus with a roller holder that allows individual rollers to adjust their pressing force or position without moving the entire holder, utilizing a sliding portion and shaft pressing portions to change the nip pressure and move rollers, integrated within an image recording apparatus to record images on sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the entire spur holder is moved vertically to adjust roller position, then the roller position can be changed, but the apparatus size is enlarged and power consumption increases
Solution Approach 1:
The invention divides the spur holder into a fixed main body and a movable shaft pressing portion. Instead of moving the entire holder, only the shaft pressing portion is moved independently to adjust roller positions. This segmentation allows position adjustment with reduced power consumption while maintaining compact apparatus size.
Solution Approach 2:
The shaft pressing portion is designed to be dynamically movable relative to the fixed holder body. This dynamic structure enables on-demand adjustment of roller pressing force and position without requiring movement of the entire holder, thereby reducing power requirements while maintaining operational flexibility.
2Ease of operation
If the entire spur holder is moved vertically to adjust roller position, then the roller position can be changed, but the apparatus size is enlarged
Solution Approach 1:
The invention divides the spur holder into a fixed main body and a movable shaft pressing portion. Instead of moving the entire holder, only the shaft pressing portion is moved independently to adjust roller positions. This segmentation allows position adjustment with reduced power consumption while maintaining compact apparatus size.
Solution Approach 2:
The invention introduces a new dimension of movement by allowing the shaft pressing portion to move independently in the vertical direction while the holder body remains fixed. This dimensional separation enables position adjustment without requiring the entire apparatus to be enlarged.
3Force
If the shaft pressing portion moves away from the shaft, then the pressing force decreases, but the sheet jam becomes harder to clear
Solution Approach 1:
The shaft pressing portion is designed to be dynamically movable relative to the fixed holder body. This dynamic structure enables on-demand adjustment of roller pressing force and position without requiring movement of the entire holder, thereby reducing power requirements while maintaining operational flexibility.
Solution Approach 2:
The invention changes the pressing force parameter dynamically by moving the shaft pressing portion closer to or farther from the shaft. This parameter adjustment allows optimization of pressing force for different operating conditions, including sheet jam clearance scenarios where higher pressing force may be beneficial.
Data Source
AI summary
The disclosure relates generally to a conveying apparatus and an image recording apparatus including the conveying apparatus. The conveying apparatus may include a plurality of first rollers and a second roller configured to form a nip point with each of the first rollers so that a sheet may be conveyed. The conveying apparatus may also include a roller holder configured to support the first roller and allow the plurality of first rollers to move toward and away from the second roller. The roller holder may include a shaft pressing portion configured to press shafts of the first rollers, and a sliding portion configured to move in a width direction between a third position and a fourth position to cause the shaft pressing portion to move between a first position and a second position, respectively.