Rollup Ballistic Panel Segmented Sheets
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Solution Overview
Problem
Multi-layer ballistic curtains are difficult to roll up due to the varying radii of the outer and inner layers, causing material bunching and making it challenging to roll the curtain tightly.
Innovation Solution
A ballistic panel with a plurality of ballistic sheets made from high-strength materials, where each sheet has a unique edge configuration allowing them to slide relative to each other when rolled up, preventing bunching and enabling tight rolling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple layers of ballistic material are used to achieve desired ballistic protection, then the ballistic protection level is improved, but the curtain becomes difficult to roll up tightly due to varying radii of outer and inner layers causing material bunching
Solution Approach 1:
The ballistic curtain is divided into multiple separate layers that are not permanently attached to each other. Each layer can move independently, allowing them to roll up without bunching while maintaining the cumulative ballistic protection of multiple layers. The layers are connected only at the top edge to the header material, enabling relative movement between layers during rolling operation.
2Strength
If multiple layers of ballistic material are secured together around the perimeter to achieve ballistic protection, then the ballistic protection level is improved, but the ability to roll the curtain up tightly is reduced due to material bunching
Solution Approach 1:
The curtain structure is segmented into distinct layers connected only at the top edge to the header material. This segmentation allows each layer to maintain its own roll radius without constraining the others, preventing bunching and enabling tight rolling while preserving the protective function of multiple layers.
Solution Approach 2:
The connection between layers is made dynamic rather than rigid. By attaching layers only at the top edge and leaving bottom and lateral edges free, the structure allows dynamic adjustment of layer positions during rolling and unrolling operations, preventing material bunching while maintaining protection.
Data Source
AI summary
A ballistic panel for a rolling shutter assembly covering an opening may include a ballistic panel cover and a plurality of ballistic sheets disposed within the ballistic panel cover. Each ballistic sheet may be fabricated from a high-strength material and have a sheet upper edge, a sheet lower edge and oppositely disposed sheet lateral edges. The plurality of ballistic sheets may be attached to each other proximate the sheet upper edges and not attached to each other along the sheet lower edges and the sheet lateral edges such that the plurality of ballistic sheets slide relative to each other when the plurality of ballistic sheets are rolled up around the sheet upper edges. The ballistic panel may be attached to a shutter curtain of a rolling shutter assembly at the sheet upper edges to roll up around a shutter support member without bunching and rippling.