Bullet-resistant Roller Door with Segmented Antiballistic Inserts

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Solution Overview

Problem

Conventional roller doors face a trade-off between high-speed operation and ballistic protection, as materials and constructions that provide sufficient ballistic resistance significantly increase weight, compromising the door's ability to move quickly and leading to sagging issues in wide door constructions.

Innovation Solution

A bulletproof roller door design featuring plate-shaped antiballistic inserts oriented obliquely within the door leaf elements, combined with defense strips that cover gaps between inserts, allowing for lightweight construction and enhanced ballistic protection without the need for complex shaping or additional holding elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If solid profile inserts are used to fill the entire volume of slats for bulletproof properties, then ballistic resistance is improved, but weight increases considerably

Engineering Contradiction:

Improveballistic resistanceVSAvoidweight of door leaf

Core Design Contradiction:

StrengthVSWeight of moving object

Solution Approach 1:

The insert is divided into a plate-shaped antiballistic insert and separate defense strips that cover gaps between inserts. This segmentation allows the antiballistic protection to be achieved with less material than a solid profile, reducing weight while maintaining protective functionality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of filling the entire volume of the slat with insert material, the invention uses plate-shaped inserts that provide antiballistic protection only where needed, combined with defense strips to cover the gaps. This partial action approach achieves sufficient ballistic resistance without the excessive weight of complete volume filling.

Inventive Principle:

Principle #16Partial or excessive action

2Strength

If heavy inserts are used to ensure bulletproof properties, then ballistic protection is improved, but the high-speed property of the roller door deteriorates

Engineering Contradiction:

Improveballistic protectionVSAvoidoperating speed

Core Design Contradiction:

StrengthVSSpeed

Solution Approach 1:

The protective system is segmented into plate-shaped inserts and separate defense strips, allowing for a lighter overall construction that can be moved at high speeds while still providing comprehensive ballistic protection through the coordinated arrangement of these elements.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention applies antiballistic material only partially - through plate-shaped inserts and defense strips rather than solid volume filling - achieving sufficient protection for high-speed operation without the excessive weight that would compromise speed performance.

Inventive Principle:

Principle #16Partial or excessive action

3Strength

If heavy door leaf construction is used for ballistic resistance, then strength is improved, but sagging in wide door constructions increases

Engineering Contradiction:

Improveballistic resistanceVSAvoidsagging

Core Design Contradiction:

StrengthVSShape

Solution Approach 1:

The door leaf is constructed with segmented plate-shaped inserts and defense strips rather than heavy solid material, distributing the protective function across multiple lightweight elements that reduce overall weight and prevent sagging in wide door constructions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Antiballistic protection is implemented through partial volume occupation with plate-shaped inserts and defense strips, achieving sufficient strength to prevent sagging without the excessive weight of complete volume filling that would cause deformation in wide doors.

Inventive Principle:

Principle #16Partial or excessive action

4Reliability

If complex holding elements are added to secure inserts, then reliability is improved, but device complexity increases

Engineering Contradiction:

Improveinsert retentionVSAvoidconstruction complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The defense strips serve dual functions: they cover the gaps between inserts for ballistic protection and simultaneously provide structural support and retention for the plate-shaped inserts, eliminating the need for separate complex holding elements.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The defense strips are designed as multi-functional elements that provide both ballistic protection by covering gaps and structural support by retaining the inserts, reducing the overall number of components and simplifying the construction while maintaining reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11543215B2Bullet-resistant roller door

Publication Date: 2023.01.03

AI summary

A bulletproof roller door (1) has a door leaf (2) includes bendably connected door leaf elements (21) and defines a door leaf plane in roller door closed state, the door leaf being moveable between an open position and a closed position via a drive (5). The door leaf elements have cavities (25) with an antiballistic insert (26) insertable therein. The inserts of adjacent door leaf elements overlap in the closed state of the roller door (1). At least one antiballistic defense strip (30, 31) is set at an angle in relation to the insert and covers a gap between the inserts of adjacent door leaf elements in the closed state and is arranged in the cavity of the door leaf element. It is thus achieved that the roller door (1) possess high-speed properties, has a lowest weight possible, and also offers protection against ballistic effects.