Composite Fence Post Structure for Tensioned Wire Fencing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fence posts, whether wooden, steel, or plastic, face issues with durability, weight, universality, and ease of installation, particularly when used in tensioned wire fencing for animals, as they either fail prematurely, are specific to certain fence designs, or require complex and costly installation methods.
Innovation Solution
A fence post design featuring a U-shaped metallic member with a coaxially housed plastic insert, allowing for secure attachment of horizontal wires and enabling easy installation by preventing axial motion of the insert, thus providing strength, lightness, durability, and flexibility, while accommodating various wire mesh patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wooden posts are used with traditional wire staples, then the attachment method is simple and inexpensive, but the posts fail many years before the wire fencing due to banned preserving chemicals
Solution Approach 1:
The invention uses a composite structure combining a steel U-shaped member (for strength and durability) with a plastic insert (for corrosion resistance and longevity). This composite material approach allows the post to withstand environmental factors and animal pressures without rusting or rotting, achieving service life comparable to or exceeding the wire fencing itself.
Solution Approach 2:
The plastic insert is housed coaxially within the steel U-shaped member, creating a nested structure. The insert protects the steel from direct contact with corrosive elements while the steel provides structural strength. This nested configuration resolves the contradiction by combining the advantages of both materials.
2Productivity
If steel intermediate posts with integral clips are used, then the speed of fixing wire fences is improved, but the posts are specific to particular fence designs rather than universal
Solution Approach 1:
The U-shaped metallic member with its open configuration can accommodate wire fencing at various heights and patterns by simply adjusting where the wires are attached to the insert. The same post design works for different animal species and fence configurations, making it a universal solution rather than requiring different posts for each fence type.
Solution Approach 2:
The system allows dynamic adjustment of wire attachment positions along the length of the insert, enabling the same post to adapt to different fence designs and animal requirements without changing the post itself.
3Strength
If concrete posts with plastic inserts are used, then the posts are strong and long lasting, but the posts are very heavy to manipulate and require expensive and time consuming installation
Solution Approach 1:
The invention changes the material parameters from heavy concrete to lighter steel and plastic combinations, maintaining strength while reducing weight. The U-shaped steel member provides structural integrity comparable to concrete, but the overall post is significantly lighter and easier to handle and install.
Solution Approach 2:
The post is segmented into two functional components: the steel U-shaped member for structural strength and ground anchoring, and the plastic insert for wire attachment and corrosion protection. This segmentation allows each component to be optimized for its specific function while keeping the overall installation process simple.
4Ease of operation
If plastic posts are used, then the posts are light and easy to install, but they struggle to be robust enough to withstand the forces from the tensioned fence mesh and animal pressure
Solution Approach 1:
The invention combines plastic (providing light weight and ease of installation) with steel (providing strength and robustness). The U-shaped steel member withstands the tension forces from the fence mesh and impacts from animals, while the plastic insert provides the interface for wire attachment and reduces overall weight.
Solution Approach 2:
The plastic insert acts as an intermediary between the wire fencing and the steel structure, distributing loads and providing a suitable surface for wire attachment, while the steel U-shaped member provides the ultimate structural support against heavy forces.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves strength, lightness, durability, and ease of installation, supporting various fence designs and wire patterns, with reduced installation costs and time, and improved resistance to animal pressure.
Implementation Method 1
At least axial motion of the insert may be prevented by frictional engagement with the metallic member
Data Source
Figure 1~2
Figure 3
AI summary
A fence post 2 comprises an elongate metallic member 4 having a substantially U-shaped cross section. An elongate insert 12 of plastics material is housed coaxially in the metallic member 4 and held thereby, such that horizontal wires 18 can be attached to the insert. In a fence comprising at least one such fence post 2, and a method of installing the fence, substantially horizontal wires 18 are tensioned against the insert(s) 12, and fasteners 20 secure the wires to the insert(s) whilst allowing the wires 18 to move in the direction in which they extend.