Security Fence Panel with Inclined Intermediate Sheets
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Solution Overview
Problem
Existing security fencing is vulnerable to damage from power tools like angle grinders, particularly with the increased availability of cordless models, and lacks effective anti-climb and projectile resistance.
Innovation Solution
A security fence panel design featuring mutually confronting security mesh sheets connected by inclined intermediate sheets, which transfer forces and enhance strength, combined with a loose connection to allow movement and prevent tool attachment, providing improved anti-grind, anti-climb, and projectile resistance properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If welded steel wire mesh is used for security fencing, then strength and anti-climb properties are improved, but vulnerability to power tools such as angle grinders increases
Solution Approach 1:
The fencing is divided into multiple horizontal panels separated by vertical intermediate panels. This segmentation creates multiple layers of resistance, where each panel must be breached independently. The intermediate panels are spaced 100-500mm apart, creating a segmented structure that prevents continuous grinding through the fence while maintaining overall strength.
Solution Approach 2:
The invention introduces a vertical dimension to the anti-grind protection by placing intermediate panels at different heights (100-500mm spacing). This vertical segmentation adds a third dimension to the traditional two-dimensional wire mesh, requiring the attacker to grind through multiple horizontal planes separated by vertical obstacles, significantly increasing the time and effort required to breach the fence.
2Reliability
If mesh openings are made small for anti-climb protection, then climbing resistance is improved, but ease of manufacture and material usage are worsened
Solution Approach 1:
The anti-climb function is segmented across multiple horizontal panels with small mesh openings, while the intermediate panels provide additional separation. This allows each individual panel to have smaller, easier-to-manufacture openings while collectively providing strong anti-climb protection through the multi-panel structure.
3Object-affected harmful factors
If multiple intermediate panels are added to increase anti-grind protection, then resistance to power tools is improved, but device complexity and material usage increase
Solution Approach 1:
The invention uses a partial action approach by spacing intermediate panels at 100-500mm intervals rather than making the fence solid. This partial spacing provides sufficient anti-grind protection to prevent effective grinding while maintaining ease of manufacture and reducing material usage compared to a solid structure.
Solution Approach 2:
The invention optimizes the spacing parameter of intermediate panels to fall within the 100-500mm range. This parameter change creates the optimal balance where the spacing is large enough to allow manufacturing and material efficiency but small enough to prevent effective grinding through the fence, achieving anti-grind protection without excessive complexity.
4Quantity of substance
If security mesh sheets are spaced apart to reduce material usage, then weight and material consumption are reduced, but structural stability is worsened
Solution Approach 1:
The intermediate panels are pre-positioned at specific intervals (100-500mm) between the front and rear mesh sheets to provide preliminary structural support. This preliminary action maintains the spacing between mesh sheets while ensuring structural stability through the intermediate reinforcement elements.
Solution Approach 2:
The intermediate panels act as intermediary elements between the front and rear mesh sheets, providing structural connection and stability while allowing the sheets to remain spaced apart. These intermediaries prevent excessive movement and maintain the integrity of the spaced structure without requiring the mesh sheets to be in direct contact.
Data Source
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AI summary
A security fence panel comprising mutually confronting security mesh sheets which in use are spaced apart, the security mesh sheets being connected by intermediate sheets wherein in use the intermediate sheets are inclined to the horizontal and extend across the space between the confronting security mesh sheets.