Sheet Feeding Device Supporting Frame With Swing Center Portion
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Solution Overview
Problem
Existing sheet feeding device supporting frames suffer from poor positional accuracy due to deviations in the relative position between side plates, leading to inclined or distorted units, which can cause sheets to be fed obliquely, affecting the precision of image reading and sorting processes.
Innovation Solution
A supporting frame design for sheet feeding devices that includes a bottom plate, a first side plate with a supporting portion and bent portions, and a second side plate with a predetermined interval, where the first side plate has a swing center portion that adjusts relative to the second side plate, ensuring accurate positioning and preventing deviations even when the base plate is inclined or warped.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a base member is used to support the pair of side plates, then the structure is simplified and easy to manufacture, but the relative position between side plates deviates due to warpage or distortion of the base member
Solution Approach 1:
The supporting frame is divided into multiple independent side plates (first side plate, second side plate, third side plate, fourth side plate) that are not dependent on a single base member for positioning. Each side plate is independently supported, eliminating the warpage issue of a unified base member.
Solution Approach 2:
The swing center portion is positioned asymmetrically on the first side plate, projecting downward beyond the lower end portions of the bent and erected portions. This asymmetric design creates a stable pivot point that prevents deviation and maintains parallelism between side plates.
2Stability of the object's composition
If the base member is fixed rigidly to support side plates, then structural stability is improved, but any inclination or warpage of the base member directly affects the relative position accuracy of side plates
Solution Approach 1:
The first side plate is designed to be swingable relative to the bottom plate around the swing center portion, transforming a rigid fixed connection into a dynamic adjustable connection. This allows the side plate to self-adjust and maintain parallelism even when the bottom plate has inclination or warpage.
Solution Approach 2:
The swing center portion acts as an intermediary element between the bottom plate and the first side plate. It serves as a pivot point that decouples the positional relationship between the bottom plate and side plates, preventing direct transmission of warpage effects.
3Device complexity
If side plates are positioned with simple fixing, then assembly is simplified, but the parallelism between rotation shafts of feeding rollers deteriorates
Solution Approach 1:
The bent and erected portions are pre-formed on the side plates with specific geometries that guide the positioning of feeding rollers. The swing center portion is pre-positioned to ensure proper alignment, so that when components are assembled, the parallelism is automatically maintained without complex adjustment procedures.
Data Source
AI summary
A supporting frame of a sheet feeding device includes a bottom plate, a first side plate fixed to the bottom plate, and a second side plate fixed to the bottom plate. The first side plate includes a supporting portion, a first bent and erected portion, and a second bent and erected portion. The supporting portion includes a swing center portion having a swing center of the first side plate when the first side plate is positionally adjusted relative to the second side plate. In a direction in which a bending edge line formed between the supporting portion and the first bent and erected portion extends, the swing center portion projects downward than a lower end portion of the first bent and erected portion and a lower end portion of the second bent and erected portion are and contacts the bottom plate.