Sheet Feeding Apparatus Pivoting Pad Assembly
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Solution Overview
Problem
Existing sheet feeding apparatuses require manual compression of a coil spring to assemble the separation roller, making maintenance and assembly cumbersome.
Innovation Solution
A sheet feeding apparatus with a pivotally attached pad assembly and an elastic member, where the pad assembly includes a separation pad and a holder, and a regulating mechanism with engaging portions to restrict the pad's movement, allowing for easier assembly and maintenance of the separation roller by eliminating the need for manual compression of the spring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coil spring is used to press the separation pad toward the separation roller, then the sheet feeding function is improved, but the assembly process becomes complicated requiring manual compression of the spring
Solution Approach 1:
The pad assembly is segmented into a holder and a separation pad, with the holder being pivotally attached to the supporting unit. This segmentation allows the spring to be pre-installed in the holder without manual compression, as the pivotal connection enables the pad assembly to be attached in a relaxed state and then pivot into its operational position where the spring automatically engages.
Solution Approach 2:
The holder is designed to pivot about a pivot axis between a stored position and an operational position. This dynamic capability allows the assembly process to occur in a relaxed state, after which the holder pivots into place, automatically compressing the spring and engaging the engaging portions without requiring manual spring compression during assembly.
2Power
If the separation roller is assembled to the supporting unit with the spring, then the sheet feeding force is improved, but the maintenance and disassembly become difficult
Solution Approach 1:
The pad assembly is separated into a holder containing the spring and a separation pad, with the holder pivotally attached to the supporting unit. This segmentation allows the separation roller to be removed and reassembled independently without requiring compression of the spring, as the holder can be detached, the spring remains contained, and the roller can be serviced separately.
Solution Approach 2:
The pivotal attachment of the holder to the supporting unit enables easy detachment and reattachment. During maintenance, the holder can be pivoted to a stored position or completely detached, allowing the separation roller to be removed and serviced without dealing with compressed spring tension, significantly easing maintenance procedures.
3Ease of operation
If the pad assembly is allowed to separate freely from the supporting unit, then the ease of assembly is improved, but the risk of spring misalignment increases
Solution Approach 1:
The spring is pre-installed in the holder in a relaxed state before the holder is attached to the supporting unit. The engaging portions are designed to automatically engage when the holder pivots into its operational position, ensuring proper spring alignment without requiring precise manual positioning or risking misalignment during assembly.
Solution Approach 2:
The pivotal movement of the holder about the pivot axis provides a controlled path for engagement. As the holder pivots from the stored position to the operational position, the engaging portions naturally guide the spring into proper alignment, eliminating the risk of misalignment while maintaining ease of assembly.
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 convenient assembly and maintenance of the separation roller by preventing excessive separation of the pad assembly from the supporting unit, reducing the risk of spring misalignment and improving maintainability.
Implementation Method 1
an elastic member configured to press the pad assembly toward the separation roller
Implementation Method 2
The separation pad is configured to contact a sheet at the other end side and apply a resistive force (friction resistance) to the sheet such that the sheet is not fed
Data Source
AI summary
A sheet feeding apparatus is provided, including a separation roller configured to apply a feeding force to a sheet, a pad assembly configured to pivot about a pivot axis in a direction close to or away from a supporting unit, and an elastic member configured to press the pad assembly toward the separation roller. The pad assembly includes a separation pad disposed facing the separation roller configured to apply a resistive force to a sheet, a holder holding the separation pad, and a first engaging portion disposed on a side of a distal end. The supporting unit includes a second engaging portion. The first and second engaging portions are configured to engage each other to restrict the pad assembly such that the distal end is not separated from the supporting unit more than a specified distance when the separation roller is separated from the separation pad.