Rotating National Flag Hoisting Pole for Rainwater Adhesion Control
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Solution Overview
Problem
Existing flag hoisting systems fail to prevent the surface adhesion of rainwater on large flags, leading to slow restoration and unsightly appearance, and do not effectively prevent entwinement due to wind while maintaining a vertical and straight line.
Innovation Solution
A rotation type flag hoisting pole with a rainwater adhesion suppressing rod installed at the top end of a flag hanging steel bar, featuring a fixed and rotating structure, which minimizes adhesion area and induces ventilation, while supporting self-weight and preventing wind entwinement through a symmetrical and balanced up-down movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a rope type hanger is used to suspend the flag, then the structure is simple and easy to manufacture, but the flag binding part bends like a bow by the wind causing ugly appearance
Solution Approach 1:
The patent replaces the durable but flexible rope hanger with a rigid steel bar hanger. The steel bar maintains its shape under wind load, preventing the bow-shaped bending that occurs with ropes. This substitution prioritizes aesthetic appearance over manufacturing simplicity, using a stronger but more complex structure to achieve the desired straight vertical line appearance.
2Device complexity
If the flag hanger is fixed without rotation capability, then the structure is simple, but the flag becomes entwined around the hoisting pole due to wind
Solution Approach 1:
The patent introduces a rotational joint between the hoisting pole and the flag hanger assembly, allowing the hanger to rotate freely around the pole. This dynamic capability enables the flag to adjust its orientation in response to wind direction, preventing entwinement while maintaining a relatively simple overall structure. The rotation mechanism is achieved through a clevis joint that permits angular movement.
3Ease of manufacture
If the up-down rope is mounted off-center, then installation is easier, but the vertical moving body moves with eccentricity losing balance
Solution Approach 1:
The patent employs a symmetrical arrangement of the up-down ropes relative to the vertical moving body's centerline. By positioning the ropes symmetrically, the system ensures that forces are distributed evenly, preventing eccentric movement and maintaining balance during vertical motion. This symmetrical configuration requires precise installation but eliminates the instability caused by off-center mounting.
4Device complexity
If a conventional flag hanger structure is used, then the structure is simple, but rainwater adheres to the flag surface causing slow restoration and unsightly appearance
Solution Approach 1:
The patent divides the flag hanger into multiple functional segments: a rigid steel bar for structural support, a rotational joint for wind adaptation, and a specialized flag binding section. This segmentation allows each component to perform its specific function optimally, with the rigid structure preventing rainwater adhesion while the rotational joint handles wind loads, achieving both aesthetic and functional goals without excessive complexity.
Data Source
AI summary
The present invention relates to a fag hoisting pole with key characteristics in that a “rainwater adhesion suppressing rod” is installed at a top end of a flag hanging steel bar provided with an upper “fixed structure” P and a lower “rotating structure” Q to execute a “rotation method”, so as to inhibit a surface adhesion phenomenon of a large flag wet in the rain while minimizing an adhesion area thereof, and at the same time, an adhesion part becomes a starting point for inducing ventilation into the adhesion part, whereby a speed of unfolding the large flag from the surface adhesion part thereof to the original state can be maximized.