Profiled Fastening System for Stretched Fabric with Smooth Transition Groove
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Solution Overview
Problem
Existing solutions for stretched fabric coverings are inadequate for complex configurations, often causing damage due to friction and lacking modularity, with insufficient rigidity and protection for the fabric, especially on large frames.
Innovation Solution
A fixing system using rigid profiles with a specific groove and anchoring loop design that allows for flexible canvas attachment, providing protection and improved rigidity while enabling modular use across different configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional profile designs with sharp edges and narrow passages are used to secure the canvas, then the canvas can be attached to the frame, but the fabric is damaged due to friction and rubbing against sharp edges
Solution Approach 1:
A smooth transition surface is introduced as an intermediary element between the sharp profile edges and the canvas. This surface guides the canvas into the retention groove without exposure to sharp edges, eliminating friction damage while maintaining secure attachment.
Solution Approach 2:
Instead of having the canvas pass through narrow passages between sharp edges, the design inverts the approach by providing a smooth guiding surface that leads the canvas into a retention groove, reversing the harmful friction-based attachment mechanism.
2Ease of manufacture
If simple profile designs are used for stretched canvas coverings, then manufacturing is easier, but the system lacks modularity and cannot accommodate complex configurations
Solution Approach 1:
The profile is divided into distinct functional segments: a body portion for structural support, a smooth transition surface for canvas guidance, and a retention groove for secure attachment. This segmentation allows each part to be optimized independently while maintaining overall simplicity.
Solution Approach 2:
The profile design incorporates multiple functions within a single element: structural support, canvas guidance, and retention. This multi-functionality provides modularity that can accommodate various configurations without requiring complex specialized components.
3Strength
If massive profiles are used to provide sufficient rigidity for large frames, then the frame gains structural strength, but the weight of the system increases significantly
Solution Approach 1:
The profile utilizes a thin-walled hollow section design that provides high structural rigidity relative to its weight. The hollow structure acts as a stiff shell that resists deformation without requiring massive material cross-sections.
Solution Approach 2:
The profile combines materials and structural forms to achieve high strength-to-weight ratio, using the hollow section geometry to maximize rigidity while minimizing material usage and overall weight.
Data Source
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AI summary
The present invention concerns a fastening system for producing stretched coverings, comprising rigid profiled sections and at least one flexible fabric bordered by a peripheral anchoring cord. The cross-section of said rigid profiled sections has an upper groove provided with means that are complementary to the cord, a side inclined backwards with an angle Alpha1 of between 210° and 250°, the rear face of said profiled section having a lower part that opens downwards by means of a lower groove provided with means that are complementary to the cord in order to allow a stretched fabric to be hooked thereto, the rear face having a lower part inclined backwards with an angle Alpha2 of between 200° and Alpha1 + 30°, and an upper part that extends between the inflection line of said rear face and the upper rear edge, said upper part forming an angle Alpha3 of between Alpha2 - 10° and 180°.