Blind Frame Roller Shutter Box Reinforcement

The invention combines the conventional steel reinforcement profile already present in the window frame with an additional L-shaped reinforcement profile. The first leg of the L-shaped profile attaches to the roller shutter box floor base, while the second leg integrates with the existing steel chamber reinforcement, creating a merged reinforcement system that significantly increases load-bearing capacity for wide roller shutter boxes.

The solution employs a composite reinforcement system combining two different reinforcement profiles: the conventional steel profile embedded in the window frame and the additional L-shaped profile (which can be made of steel, aluminum, or other suitable materials). This composite approach allows optimization of each component's function while achieving overall superior structural performance.

The reinforcement system is segmented into two independent parts: the conventional steel reinforcement already integrated in the window frame, and the additional L-shaped reinforcement profile that can be installed separately. This segmentation allows the roller shutter box to be pre-assembled and tested independently, then mounted to the frame with the reinforcement profile attached subsequently, simplifying the overall assembly process.

The conventional steel reinforcement profile is pre-installed in the window frame's steel chamber before the roller shutter box is mounted. This preliminary action prepares the frame structure in advance, allowing the roller shutter box to be assembled separately and then securely attached without requiring complex in-situ reinforcement installation.

The additional L-shaped reinforcement profile is strategically positioned with its second leg covering only the outer visible surface area of the window frame. This local placement provides the necessary structural reinforcement at the critical mounting points while minimizing the profile's presence on thermally critical surfaces, thereby reducing the impact on thermal insulation performance.

The second leg of the L-shaped reinforcement profile acts as an intermediary element that covers the connection area between the roller shutter box and the frame. By positioning this leg on the outer visible surface, it serves as a mediator that provides structural support while limiting thermal bridge formation compared to alternative reinforcement configurations.

Instead of replacing the entire plastic floor base profile with metal (which would create significant thermal bridges), the invention applies a localized metal reinforcement in the form of the L-shaped profile. This metal reinforcement is concentrated only where structural strength is needed for mounting the roller shutter box, while the majority of the floor base profile remains plastic to maintain thermal insulation performance.

The solution uses a composite approach combining plastic (for thermal insulation) and metal (for structural strength). The plastic floor base profile maintains thermal insulation, while the additional L-shaped metal reinforcement profile provides the necessary structural support, creating a hybrid system that optimizes both thermal and mechanical properties.