Transport Roller Support Structure for Paper Feed Accuracy
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Solution Overview
Problem
Conventional image recording apparatuses experience accuracy degradation in paper transport due to external forces causing radial displacement of the transport roller within the bearing.
Innovation Solution
A transport apparatus with a transport roller supported by first and second support members featuring circular arc receiving portions, positioned differently in the circumferential direction to minimize unsupported areas and reduce radial displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the transport roller is supported by a bearing in a conventional manner, then the structure is simple and easy to manufacture, but the accuracy of transporting the paper is degraded due to radial displacement
Solution Approach 1:
The support structure is segmented into multiple receiving portions (first receiving portion and second receiving portion) that are positioned at different circumferential locations. This segmentation allows each portion to independently support the transport roller, distributing the support function across multiple locations to reduce radial displacement while maintaining structural simplicity
Solution Approach 2:
Multiple receiving portions are merged into a single support structure that works together to hold the transport roller. The first and second receiving portions are combined in the support member to provide comprehensive circumferential support, reducing the unsupported area while keeping the overall structure integrated and simple
2Reliability
If the transport roller is supported at limited positions, then the structure is simple, but the unsupported area in the circumferential direction causes radial displacement under external forces
Solution Approach 1:
The support structure provides different support characteristics at different circumferential locations. The first and second receiving portions are positioned at specific circumferential angles to provide localized support where needed, creating non-uniform support distribution that optimizes stability while minimizing radial displacement under external forces
Data Source
AI summary
A transport apparatus includes a transport roller having a first supported portion and a second supported portion at positions separated in a first direction, and configured to abut against a sheet, rotate in a second direction about a rotation axis extending in the first direction, and transport the sheet; a first support member configured to rotatably support the transport roller, the first support member having a first receiving portion which is in the form of a circular arc and configured to abut against a portion in a circumferential direction of an outer periphery of the first supported portion; and a second support member configured to rotatably support the transport roller, the second support member having a second receiving portion which is in the form of a circular arc and configured to abut against a portion in a circumferential direction of an outer periphery of the second supported portion.