Intruder-Resistant Screen Clamping Structure for Higher Impact Strength
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Solution Overview
Problem
Existing intruder resistant screens, such as the Crimsafe Security System, face challenges in achieving improved impact strength while maintaining reduced manufacturing time and efficient assembly.
Innovation Solution
The improved intruder resistant screen features extruded aluminium frame members with channel sections, injection moulded plastic or aluminium corner stakes, and carbon fibre reinforced polymer clamp elements. These clamp elements are short and distributed along the frame members, held in place by self-drilling screws with a pan head or countersunk head, which provide additional holding strength and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional clamping members are used in intruder resistant screens, then the structure is simple and manufacturing is easier, but the impact strength is insufficient
Solution Approach 1:
The clamping member is constructed as a composite structure comprising a channel section (providing structural framework) and a clamping portion with serrated edges (providing gripping force). This composite design combines different functional elements to achieve both high impact strength and secure mesh retention, resolving the contradiction between strength and complexity by integrating multiple functions into a single unified component.
Solution Approach 2:
The clamping member is divided into distinct functional segments: a channel section for structural support and attachment to frame members, and a clamping portion with serrated edges for gripping the mesh. This segmentation allows each part to be optimized for its specific function, enhancing overall impact strength while maintaining manufacturing efficiency through modular construction.
2Strength
If complex assembly procedures are used to enhance security, then the impact strength improves, but the manufacturing time increases
Solution Approach 1:
The clamping member integrates multiple functions into a single component: structural support through the channel section, mesh gripping through the serrated clamping portion, and attachment capability through the configured ends. This merging eliminates the need for separate clamps, screws, and mounting brackets, significantly reducing assembly steps and manufacturing time while maintaining high impact strength.
Solution Approach 2:
The clamping member is designed to be self-installing, where the channel section fits over the frame member and the clamping portion automatically grips the mesh when positioned. The configured ends provide self-alignment and self-securing features, eliminating the need for complex alignment procedures or additional fastening operations, thus accelerating manufacturing while ensuring secure assembly.
Data Source
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AI summary
An intruder resistant screen providing improved strength. The improved intruder resistant screen comprises a frame, a woven wire intruder resistant mesh covering an opening enclosed by the frame, a plurality of clamp elements engaging with frame members to hold the mesh by a leveraged clamping action and at least one fastener holding each clamping member to the frame member. Each fastener has a drilling portion, a shank portion, a head and a thread. The frame comprises multiple frame members joined by corner stakes and there are two or more clamp elements engaging each frame member.