Double Sliding Roller Shutter Profile for Wide-Opening Fixing
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Solution Overview
Problem
Existing roller shutter curtains for wide bay windows suffer from deformation under wind pressure, leading to slat separation and joint stress, and current solutions either increase curtain thickness or result in unsightly and mechanically weak fixings.
Innovation Solution
A double sliding device with U-shaped grooves and a T-shaped intermediate profile that allows for secure, invisible, and aesthetically pleasing attachment of roller shutter tracks to a lintel or threshold, using a folding fixing bracket with interlocking means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two single slides are assembled back-to-back by screwing them together, then the roller shutter can be installed on wide openings, but the fixing brackets are unsightly and offer poor mechanical strength
Solution Approach 1:
The patent merges two separate single slides into a single integrated double slide profile. This unified structure eliminates the need for separate fixing brackets on each slide, providing both aesthetic improvement (no visible brackets) and enhanced mechanical strength (integrated construction). The double slide is fixed as a single unit to the lintel or threshold, combining the functions of both slides while improving overall structural integrity.
2Ease of manufacture
If L-shaped fixing brackets are used to attach the double slide profile, then the slides can be fixed at their ends, but the vertical blade of the bracket has very low resistance to deformation under wind pressure
Solution Approach 1:
The patent extracts and eliminates the L-shaped fixing bracket from the system. Instead of using separate brackets to attach the double slide to the lintel or threshold, the double slide profile itself is designed to be directly fixed to these structural elements. This removal of the weak bracket component eliminates the deformation problem while simplifying the overall fixing mechanism.
3Strength
If the slat thickness is increased to achieve higher deformation resistance, then the deformation risk is reduced, but the cross-section of the curtain when rolled up becomes larger
Solution Approach 1:
The patent segments the solution by dividing the wide opening into two separate roller shutter curtains that operate independently. Each curtain can use standard-thickness slats that maintain adequate deformation resistance, while the overall wide coverage is achieved through the side-by-side arrangement. This segmentation allows each individual curtain to have a compact rolled-up profile while collectively covering a wide opening.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a double sliding device (1) for roller shutter curtains (13; 14) (4; 5), comprising two U-shaped grooves (19, 20) extending back-to-back in the same first plane (P1) or in planes (P1'; P1") forming an angle (α). Advantageously, this double sliding device comprises two U-shaped profiles (32, 33) in the form of a slide, defining, respectively, one of the U-shaped grooves (19; 20) and extending in the first plane (P1), as the case may be, in the planes (P1'; P1") forming an angle (α). These two U-shaped profiles (32, 33) are attached back-to-back to an intermediate connecting profile (34; 34'), having a tubular or rail-shaped cross-section and defining at its ends female interlocking means (23) for receiving male interlocking means (24) of a tab fixing (25).