Cover Plate for Poka-Yoke Bulk Bin Jamming
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Solution Overview
Problem
Mass fabrication and testing systems face challenges in distinguishing between components of different conditions, leading to human error, especially when components are stored in bulk. Existing poka-yoke designs can cause bulk components to jam inside bins due to protruding poka-yoke mating features.
Innovation Solution
A cover plate is fabricated and inserted into the bulk bin to cover the poka-yoke mating feature, providing a smooth interior surface and preventing jamming of components. The cover plate is secured to the bulk bin using a securing feature, allowing for easy manual dumping of components without the risk of jamming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If poka-yoke mating features are implemented in bulk bins to prevent human error and enable visual distinction between different component conditions, then reliability is improved, but bulk components may jam inside the bins due to protruding mating features
Solution Approach 1:
The bulk bin is segmented into two functional zones: the poka-yoke mating feature protruding from the exterior surface for reliable component condition identification and prevention of human error, and the interior storage space maintained smooth and free of protrusions to prevent component jamming during dumping operations. This segmentation allows both the reliability improvement from poka-yoke features and the ease of operation during component transfer.
2Measurement precision
If poka-yoke mating features protrude from bulk bin surfaces to enable visual distinction between accepted and rejected components, then measurement precision is improved, but device complexity increases due to additional protruding structures
Solution Approach 1:
The poka-yoke mating features are localized to specific exterior surfaces of the bulk bin where they are needed for visual distinction and condition identification. The interior surfaces and component-contact areas maintain simple, smooth geometry without protrusions. This local application of complexity only where necessary for measurement precision while keeping the overall device structure simple and easy to operate.
3Productivity
If manual dumping of bulk components is performed without cover plates, then device complexity is reduced, but productivity decreases due to time-consuming and physically demanding operations
Solution Approach 1:
A cover plate acts as an intermediary component between the poka-yoke mating feature and the bulk components during dumping operations. The cover plate with its smooth interior surface prevents component jamming on the protruding mating feature, enabling efficient manual dumping. This intermediary element resolves the conflict between maintaining poka-yoke features for reliability and enabling smooth component flow for productivity.
Data Source
AI summary
One example includes a bulk bin system. The system includes a bin receptable comprising a first poka-yoke mating feature and a bulk bin configured to accommodate storage of bulk components. The bulk bin can be configured to rest on the bin receptacle and includes a second poka-yoke mating feature extending from an inner surface of the bulk bin. The second poka-yoke mating feature can be configured to engage with the first poka-yoke mating feature when the bulk bin is provided in the bin receptacle. The system further comprises a cover plate that is secured to the bulk bin via a securing feature. The cover plate includes a cover portion that extends along and is approximately aligned with the inner surface of the bulk bin to cover the second poka-yoke mating feature.