Retard Roller Replacement via Axial Holding Member
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Solution Overview
Problem
Conventional sheet conveyance apparatuses with retard separation units face difficulties in replacing the retard roller due to handling challenges, especially when the roller has a smaller diameter or is located in a narrow access path, leading to deteriorated separation performance over time.
Innovation Solution
A sheet conveyance apparatus with a support shaft having one fixed end and a free end, where a holding member allows for easy removal and replacement of the separation member by sliding along the axial direction of the support shaft, preventing direct contact with potentially deteriorating surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the retard roller is attached to a free end of a drive shaft supported at only one end, then the retard roller can be replaced by removing it from the free end, but it becomes difficult for the user to hold the retard roller during replacement
Solution Approach 1:
A holder is introduced as an intermediary component between the drive shaft and the retard roller. The holder includes a holding portion that securely grips the retard roller, allowing users to easily hold and manipulate the roller during replacement without directly handling the small roller itself. The holder acts as a mediator that bridges the gap between the drive shaft and the retard roller, facilitating easy installation and removal.
2Volume of moving object
If the retard roller has a smaller diameter, then the separation unit occupies less space, but it becomes even more difficult for the user to hold the retard roller
Solution Approach 1:
The holder serves as a mediator that compensates for the small size of the retard roller. By providing a larger gripping surface through the holding portion, the holder enables users to easily handle small-diameter rollers that would otherwise be difficult to grasp and manipulate during replacement operations.
3Device complexity
If the access path to the retard roller is narrow, then the sheet conveyance apparatus has a compact structure, but it becomes difficult for the user to access and replace the retard roller
Solution Approach 1:
The holder acts as an extended tool that increases the effective reach of the user's hand into narrow spaces. By attaching the retard roller to the holder, users can access and manipulate the roller in confined areas that would be difficult to reach with direct hand manipulation, thereby improving accessibility in compact apparatus designs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates easy and efficient replacement of the retard roller, enhancing maintenance performance and reducing wear-related deterioration, thereby maintaining effective sheet separation and conveyance.
Implementation Method 1
The conveyance member configured to convey a sheet
Implementation Method 2
The retard separation type of separation unit utilizes the friction between a surface of the sheet and a surface of the retard roller
Data Source
AI summary
A sheet conveyance apparatus includes a storage unit storing a sheet, a conveyance member to convey a sheet, a support shaft portion, and a separation unit. The support shaft portion has one end fixed to a main body of the sheet conveyance apparatus and the other end as a free end that is not fixed to the main body. The separation unit pinches and conveys a sheet with the conveyance member and separates a plurality of sheets stored in and fed from the storage unit one by one. The separation unit includes a separation member that is supported by the support shaft portion and rotatable with the support shaft portion, and a holding member to hold the separation member. By moving the holding member in an axial direction of the support shaft portion, the separation unit is removed from the apparatus with the holding member holding the separation member.