Grain Bin Placard Frame with Ramp Protuberances
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Solution Overview
Problem
Existing methods for attaching placards to grain bins are time-consuming and can damage the plastic material, leading to stripped threads and inability to securely attach signs.
Innovation Solution
A frame with U-shaped channels and ramp-like protuberances that allow for easy insertion of placards over fastener heads, preventing interference and ensuring secure attachment without damaging the material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screws are used to attach placards to grain bins, then the placard can be securely attached, but the attachment process becomes time-consuming and the plastic material gets damaged with stripped threads
Solution Approach 1:
The attachment system is divided into two independent parts: the frame structure that attaches to the grain bin (with fasteners) and the placard that inserts into the frame. This segmentation allows the frame to bear the attachment load while the placard simply slides in, separating the secure attachment function from the ease of operation function.
Solution Approach 2:
The frame acts as an intermediary component between the grain bin and the placard. Instead of directly attaching the placard to the grain bin with screws (which damages the plastic), the frame mediates the connection by providing a sturdy attachment structure that the placard can easily interface with through simple insertion.
2Reliability
If screws are driven repeatedly into plastic, then attachment is achieved, but the plastic material is damaged and threads become stripped
Solution Approach 1:
By separating the attachment function (frame with fasteners) from the placard, the harmful repeated screwing action is confined to the frame structure rather than being applied to the placard or directly to the grain bin plastic. The frame can be attached once with full threads engaged, eliminating repeated damage.
Solution Approach 2:
The frame is pre-attached to the grain bin with all necessary fasteners in place before the placard is installed. This preliminary attachment action ensures that when the placard is inserted, no additional screwing into the plastic is required, preventing further material damage.
3Ease of operation
If a frame structure is used with U-shaped channels and ramp-like protuberances, then placard insertion becomes easy and quick, but the device complexity increases
Solution Approach 1:
The frame channels have different local qualities: the inner surfaces provide smooth guidance for insertion, while the outer surfaces feature ramp-like protuberances that actively push the placard downward. This localized differentiation of surface properties enables easy insertion without requiring complex mechanisms throughout the entire structure.
Solution Approach 2:
The ramp-like protuberances use curved, inclined surfaces to gradually push the placard downward as it inserts into the frame. This curved geometry provides a smooth, continuous force that guides the placard into position without requiring sharp edges or complex mechanical components.
Data Source
AI summary
A frame for displaying a placard on a grain bin is attached to the grain bin with conventional threaded fasteners having shank portions and head portions. The head portions of the fasteners attaching the frame to the bin do not interfere with the placard's insertion into the frame by way of ramp-like protuberances formed into the frame portions above where the fasteners are located. The protuberances deflect the placard over the fasteners' heads and allow the placard to be fully inserted into the frame with either a frictional, clearance or interference fit between the fastener and the frame.