Paper Sheet Storage Cassette Alignment Mechanism
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Solution Overview
Problem
Existing paper sheet storage cassettes face issues with misalignment of stacked paper sheets during transportation due to the lack of a formed paper sheet passing region near the stacking wheel, leading to curvature and misalignment of sheets when inserted along the long edge, and misalignment of short edge stacks when transported.
Innovation Solution
A paper sheet storage cassette with a stacking unit and a stacking wheel that includes a base body rotating about a shaft with blades extending outward, and an inhibiting portion on the inner wall to prevent sheets from moving towards the passing space, featuring groove portions that catch the sheet edges to maintain alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a paper sheet passing region is formed near the stacking wheel to enable proper stacking, then paper sheets can be stacked in an aligned state, but paper sheets become misaligned during transportation of the cassette
Solution Approach 1:
The inner wall is segmented into multiple functional regions: a paper sheet passing region (with removed portion) that allows aligned stacking during operation, and an inhibiting portion (with protruding portion) that prevents movement during transportation. This segmentation allows each region to perform its specific function without interfering with the other.
Solution Approach 2:
Different local regions of the inner wall have different geometric properties: the paper sheet passing region has a removed portion creating a gap for smooth passage and alignment, while the inhibiting portion has a protruding portion that creates friction and prevents movement. This local quality differentiation resolves the contradiction between enabling passage and preventing movement.
2Ease of operation
If the paper sheet passing region is formed by removing an inner wall portion, then paper sheets can pass smoothly without collision, but the cassette structure becomes more complex
Solution Approach 1:
The inner wall is divided into distinct functional segments: a removed portion for the passing region and a protruding portion for the inhibiting region. This segmentation allows the structure to achieve complex functionality through simple geometric modifications rather than adding multiple separate components.
Solution Approach 2:
The geometric features of the inner wall itself (removed and protruding portions) perform the alignment and inhibition functions directly, without requiring additional mechanical components such as guides, stops, or adjustment mechanisms. The structure serves its own alignment and containment functions.
3Device complexity
If paper sheets are stacked on an ascending/descending stage without an inhibiting portion, then the stacking process is simple, but the short edge of paper sheets moves away from the stage causing misalignment
Solution Approach 1:
A localized protruding portion is added to the inner wall at the specific location where paper sheet edges need to be contained. This local modification provides the necessary edge containment function without complicating the overall stacking mechanism, maintaining simplicity while achieving precision.
Solution Approach 2:
The protruding portion of the inhibiting portion is positioned to preemptively prevent the paper sheet short edge from moving away from the stacking stage. By providing this preliminary constraint, the design prevents misalignment before it can occur during transportation.
Data Source
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AI summary
Disclosed is a paper sheet storage cassette (for example, banknote collection cassette 42) that includes: a stacking unit (for example, ascending/descending stage 46) in which paper sheets (for example, banknotes) inserted into the paper sheet storage cassette from the outside are stacked in a layered state; a stacking wheel 44 configured to send paper sheets inserted into the paper sheet storage cassette from the outside, one by one, to the stacking unit; a paper sheet passing space (for example, banknote passing space 48) through which the paper sheets to be sent into the stacking unit by the stacking wheel 44 pass; and an inhibiting portion 50 configured to inhibit the paper sheets stacked in the stacking unit from being moved toward the paper sheet passing space.