Adjustable Security Screen Mesh Tensioning for Flatness and Retention
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Solution Overview
Problem
Existing security screen systems face issues with mesh tensioning, retention, and fabrication challenges, including vulnerability to impact, inconsistency in flatness, and difficulty in adjusting or reusing components due to reliance on fasteners, wedges, or deformation methods, which affect performance and durability.
Innovation Solution
A screen system featuring a mesh held within a frame with adjustable tensioners that connect holders to the frame, allowing for individual tension adjustment and shape alteration, providing secure and aesthetic solutions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fasteners (screws, rivets, glue) are used to attach the mesh to the frame, then the mesh can be securely retained, but the fasteners are vulnerable when the mesh is impacted or when an attempt is made to pry the mesh from the frame
Solution Approach 1:
The frame is divided into modular sections with individual tensioning mechanisms at each corner. Each section can be independently adjusted and replaced if damaged, rather than requiring replacement of the entire frame structure. This segmentation allows localized repair and maintains overall system reliability after impact.
Solution Approach 2:
The tensioning mechanism allows dynamic adjustment of mesh tension parameters. The mesh can be retensioned after impact or installation to restore optimal performance. This parameter adjustment capability compensates for damage or relaxation without requiring component replacement.
2Shape
If the mesh is made taut to prevent it from extending or bulging outside the frame perimeter, then the mesh maintains a flat appearance and proper operation, but the mesh cannot be easily adjusted or retensioned after installation
Solution Approach 1:
The tensioning mechanism transforms the static mesh installation into a dynamic system where tension can be adjusted after installation. The adjustable tensioners allow the mesh to be retensioned multiple times throughout its service life, converting a fixed-state system into a flexible, adaptable system that maintains optimal performance.
Solution Approach 2:
The system allows end-users to perform their own tensioning adjustments without requiring specialized tools or expertise. The simple manual tensioning mechanism enables users to maintain the mesh flatness themselves, eliminating the need for professional service for routine adjustments.
3Manufacturing precision
If the mesh is cut slightly too small, then the fasteners will be too close to the edge of the mesh or will not sufficiently cover enough surface area, but if the mesh is cut slightly too large, then the mesh will be unavoidably floppy
Solution Approach 1:
The mesh is pre-attached to the frame in a relaxed state during manufacturing, allowing precise cutting without concern for immediate tensioning. The tensioning is applied as a separate preliminary action before final installation, giving fabricators flexibility in mesh sizing while ensuring proper tension is achieved through the adjustable mechanism rather than relying on precise pre-cut dimensions.
4Ease of manufacture
If wedges are used to retain the mesh in the frame channel, then fabrication becomes easier and some tensioning is allowed, but the flatness or tautness of the mesh cannot be assured and stress points may form
Solution Approach 1:
Instead of using continuous wedges or splines that create uniform pressure across the entire mesh, the system segments the tensioning into discrete points at each corner. This segmentation prevents the creation of stress diagonals and waves across the mesh while maintaining fabrication simplicity through the use of basic tensioning components.
Data Source
AI summary
A screen system in which a mesh is connected to a frame through a tensioning system. The tensioning system includes a plurality of holders which are fastened to edge portions of the mesh and a plurality of adjustable tensioners which connect the holders to the frame. Tension in the mesh and the frame can thereby be adjusted after the screen has been assembled.