Retractable Guardrail Post With Self-Locking Sleeve
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Solution Overview
Problem
Conventional guardrail posts lack multifunctionality, particularly in central business districts where they are often required to support flags or posters, leading to damage and an unsightly appearance when hanging rods are left attached.
Innovation Solution
A guardrail post design incorporating a post body, sleeves, a locking mechanism, sliders, fasteners, and retractable hanging rods that allow for the secure attachment and retraction of flags or posters, maintaining a clean appearance when not in use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hanging rod is binding to or welded to the guardrail post, then the flag or poster can be hung, but the guardrail post structure is damaged or the overall appearance is affected
Solution Approach 1:
The hanging rod is divided into multiple segments that can be extended or retracted independently. The rod consists of a first rod body and a second rod body that can slide relative to each other, allowing the hanging function to be activated only when needed without permanently modifying the guardrail post structure.
Solution Approach 2:
The hanging rod transforms from a static fixed structure to a dynamic adjustable structure. The rod can be extended to provide hanging capability and retracted to maintain a clean appearance, adapting its state based on functional requirements.
2Adaptability or versatility
If a hanging rod is binding to or welded to the guardrail post, then the flag or poster can be hung, but the overall appearance of guardrail is affected when not in use
Solution Approach 1:
The second rod body is nested within the first rod body when retracted, creating a compact structure that does not interfere with the guardrail post appearance. The nested configuration allows the hanging rod to be stored within itself, maintaining aesthetic appeal when hanging is not required.
Solution Approach 2:
The rod dynamically changes its visible profile by extending only when needed and retracting to a compact form when not in use, adapting its physical state to preserve the aesthetic appearance of the guardrail system.
3Reliability
If the locking mechanism with clamping pieces is used, then the second sleeve is securely locked to the first sleeve, but the structure becomes more complex
Solution Approach 1:
The clamping pieces automatically engage with the first sleeve when the second sleeve is inserted, providing self-locking functionality without requiring additional actuators or complex control mechanisms. The elastic deformation of the clamping pieces creates automatic engagement and retention.
Solution Approach 2:
The locking mechanism replaces complex mechanical fastening systems with a simpler elastic clamping system. The clamping pieces use elastic deformation rather than threads, pins, or multiple fasteners to achieve reliable locking, reducing overall mechanism complexity.
Data Source
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AI summary
A guardrail post includes a post body, a first sleeve secured to the post body, a locking mechanism, a second sleeve, a slider, a first fastener, a limiting seal cover, and a first hanging rod. The locking mechanism includes a locking tube, a locking sleeve, and four clamping pieces. The second sleeve extends into the locking sleeve. The slider slidably is received in the second sleeve. The limiting seal cover is positioned on the second sleeve. The first hanging rod extends into the limiting seal cover. The locking tube extends into the first sleeve and defines four first through holes, the locking sleeve is sleeved on the locking tube. The four clamping pieces are respectively positioned in the four first through holes, the locking sleeve resists the four clamping pieces inwardly. The first fastener rotatably connects the locking tube with the first hanging rod.