Cargo Container Locking System with Hardened Steel Guards
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Solution Overview
Problem
Existing locking systems for cargo containers are vulnerable to theft as they can be easily compromised using simple tools like drills, pry bars, and Sawzalls, with prior solutions failing to provide comprehensive security.
Innovation Solution
A container locking system featuring a lock box with a sliding lock rod, sliding lock rod guard, door guards, and a drop lock, all made of hardened steel, which prevents access from between the doors and makes it difficult to use drills, pry bars, or Sawzalls to break into the container by limiting access angles and reinforcing critical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple puck lock with keyhole is used, then the locking system is easy to operate, but it can be easily drilled out with a 90-degree drill in about five minutes
Solution Approach 1:
A hardened steel guard plate is introduced as an intermediary component between the lock mechanism and the external environment. This guard plate prevents direct access to the lock body, blocking drill bits and pry bars from reaching vulnerable parts while maintaining normal key operation capability.
Solution Approach 2:
The locking system combines multiple materials with different properties: a standard lock mechanism for operation, surrounded by hardened steel guard plates and reinforcement structures. This composite construction provides both operational functionality and resistance to drilling, prying, and cutting attacks.
2Device complexity
If internal locking bars are used without external protection, then the locking mechanism is simple, but the lock can be easily accessed and drilled from between the doors
Solution Approach 1:
Hardened steel guard plates are pre-installed on the container doors to prevent harmful actions before they can occur. These guards are positioned to block access paths that thieves would use to reach the lock mechanism with drills or pry bars, while not interfering with normal locking operations.
Solution Approach 2:
The protection approach moves from protecting only the lock mechanism in one dimension to adding protective elements that extend in multiple dimensions - guard plates on the door surfaces, reinforcement structures behind the lock, and protective covers that create additional spatial layers between attackers and the vulnerability points.
3Ease of operation
If the lock is positioned to be easily accessible, then the locking system is easy to operate, but it becomes vulnerable to drills and pry bars
Solution Approach 1:
Different parts of the locking system have different properties: the lock mechanism itself remains accessible for operation, while surrounding areas are reinforced with hardened steel guard plates and protection structures. This creates localized zones of high strength around vulnerable components without making the entire system difficult to operate.
4Ease of manufacture
If standard locking components are used, then the locking system is cost-effective and simple to manufacture, but it can be easily cut with a Sawzall
Solution Approach 1:
The system combines standard, easily manufactured locking components with hardened steel protection elements. The standard lock mechanism maintains ease of manufacture, while the added guard plates and reinforcement structures provide resistance to cutting tools like Sawzalls without significantly complicating the manufacturing process.
Data Source
AI summary
A locking system and method of manufacture can include: a cargo container having a first container door, a second container door, and a container frame base; a lock box affixed to the second container door, the lock box extended into and through the second container door, the lock box including a sliding lock rod configured to extend behind the first container door when the lock box is in a locked configuration; a sliding lock rod guard affixed to a first exterior surface of the first container door and affixed to a second exterior surface of the second container door; door guards affixed to the second container door and the first container door; and a drop lock affixed to an interior surface of the first container door, the drop lock including a drop lock rod configured to extend down into the container frame base when the drop lock is in the locked configuration.