Modular Security Door Liner for Incremental Upgrade
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Solution Overview
Problem
Existing security door systems are costly to upgrade and maintain as they require replacement of entire systems to achieve higher security ratings, making them inefficient in responding to dynamic threats and increasing security needs.
Innovation Solution
A modular security door leaf assembly with upgradeable liners and lock systems that allow for incremental upgrades to various security levels without replacing the entire system, featuring removable and stackable liners and interchangeable lock components to enhance resistance to different attack tools and methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire security door system is replaced to achieve higher security ratings, then the security level is improved, but the cost and complexity increase significantly
Solution Approach 1:
The security door system is divided into modular components including door leaves, liners, and lock assemblies. Each component can be independently upgraded without replacing the entire system. The liner is a removable insert that can be exchanged to achieve different security ratings, allowing incremental upgrades from SR1 to SR5 levels while maintaining the existing door frame and structure.
Solution Approach 2:
The system allows dynamic reconfiguration by enabling the removal and replacement of liners and lock assemblies. The liner can be detached from the door leaf and replaced with a different security-rated liner, making the security level adjustable and adaptable to changing threat dynamics without complete system replacement.
2Reliability
If thicker and stronger materials are used to achieve higher security ratings, then the security level is improved, but the cost increases considerably
Solution Approach 1:
The liner is nested within the door leaf structure, forming a protective core that can be independently manufactured and replaced. This nested design allows the high-security liner to be inserted into a standard door frame, achieving high security ratings without requiring the entire door assembly to be manufactured from expensive thick materials.
Solution Approach 2:
Instead of making the entire door leaf from thick expensive materials, the high-security liner provides concentrated protection at the critical interior surface where attack forces are applied. This localized reinforcement achieves the required security level while minimizing overall material costs.
3Strength
If security dogging bolts are increased in diameter and strength, then resistance to cutting attacks is improved, but the brickwork fixing may fail due to enlarged holes
Solution Approach 1:
The security dogging bolts are extracted from the traditional sealant-filled gap location and repositioned through the liner itself. The liner provides a solid mounting substrate that can accommodate stronger bolts without compromising the surrounding brickwork, as the bolts are now anchored in the liner rather than relying on enlarged holes in the masonry.
Data Source
Figure 1(a)~1(c)
Figure 2(a)~2(b)
Figure 3(a)~3(b)
AI summary
There is provided a security door leaf assembly, comprising a leaf frame structure, having at least a top rail member, a bottom rail member, a hinge stile member and a lock stile member; at least one inner leaf panel,removably mountable to a first side of said leaf frame structure; at least one outer leaf panel, removably mountable to a second side of said leaf frame structure, that is opposite to said first side; at least one first security-upgrade liner, and at least one first upgrade cavity, formed by said leaf frame structure, said at least one inner leaf panel and said at least one outer leaf panel, accessible via said at least one inner and/or outer leaf panel and adapted to removably receive and operatively affix said at least one first security-upgrade liner; and at least one first liner mount adapted to mount said at least one first security- upgrade liner in a predetermined position within said at least one first upgrade cavity.