Breaching Training Door With Bendable Bolts And Rubber Mounts
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Solution Overview
Problem
Existing breaching training doors are prone to damage and require frequent replacement, fail to simulate actual entry door conditions, and are not adaptable for outdoor use or hydraulic breaching tools without sustaining damage.
Innovation Solution
A rugged door and frame assembly with adjustable leveling struts, heavy bendable bolts, rubber mounts, and replaceable metal sleeves that allow for multiple uses without damage, enabling simulation of real breach conditions and use with hydraulic tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional shear pins are used in training doors to simulate deadbolts, then the door can be forced open during training, but the door sustains damage requiring repair or replacement after several breachings
Solution Approach 1:
The door assembly is segmented into replaceable components: the door itself, the jamb, and the shear pins. This allows damage to be isolated to specific parts that can be replaced independently, extending the overall system life. The door edge is further segmented with replaceable metal sleeves that can be quickly swapped after damage.
Solution Approach 2:
The material properties of the shear pins are changed from traditional brittle pins to heavy, bendable bolts that can bend rather than break. This parameter change allows the pins to deform under force and return to their original position, enabling multiple breach cycles without damage to the door structure.
2Stability of the object's composition
If the training door uses fixed rigid mounting, then the door structure remains stable, but the door cannot adapt to uneven terrain for outdoor use
Solution Approach 1:
The door frame transitions from a completely rigid structure to a dynamic system with adjustable components. Leveling struts with adjustable length and rubber mounts that can compress and flex allow the frame to adapt its configuration to uneven ground while maintaining operational stability during breaching exercises.
Solution Approach 2:
Rubber mounts are introduced as intermediary elements between the rigid door frame and the ground surface. These mounts act as mediators that absorb irregularities in the terrain, allowing the stable door frame to be positioned on uneven outdoor surfaces without compromising structural integrity.
3Force
If hydraulic breaching tools are used on a rigid door frame, then breaching force can be applied, but the door or frame sustains damage
Solution Approach 1:
Rubber mounts are pre-installed at strategic locations on the door frame to cushion against the concentrated forces from hydraulic tools. These mounts absorb and distribute the impact forces before they can damage the rigid frame structure, enabling repeated use with hydraulic equipment.
Solution Approach 2:
Flexible rubber mounts and replaceable metal sleeves are used to protect the rigid door frame from direct contact with breaching tools. These flexible elements deform under tool pressure, distributing forces and preventing damage to the underlying rigid structure.
4Reliability
If deadbolts are designed to shear during breaching, then the door can be forced open, but many actual deadbolts bend instead of shear, which is not accurately simulated
Solution Approach 1:
The shear pins are redesigned with changed material and geometric parameters to create heavy, bendable bolts that can bend rather than shear. This parameter change accurately simulates the behavior of actual deadbolts that bend under breaching force, providing realistic training while allowing the pins to return to their original position for repeated use.
Solution Approach 2:
The shear pins are designed to copy the bending behavior of actual deadbolts rather than replicating the shearing failure mode. This accurate copying of real-world deadbolt response provides authentic training simulation while avoiding the permanent damage associated with actual deadbolt failure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a durable, resettable, and adaptable training door that can withstand repeated breaching exercises without damage, improving training value, stability, and economy while allowing for realistic simulation of entry door breaches.
Implementation Method 1
Rubber mounts at top and bottom enable this displacement, with a fixed stop to limit the movement
Data Source
AI summary
A training door for breaching tools has a frame on which the door is hung by hinges at a hinge edge, while at an opposite edge being retained to a jamb by one or more non-shearing bolts. When the door is forced by a breaching tool at the bolt location, the jamb is forced laterally away from the door edge, against rubber mounts that allow limited jamb movement. As the door is forced in (or out, depending on its swing direction), with the jamb spread away somewhat the bolt will bend and fail pulling out of its socket. Replaceable sleeves are secured to the door edge, in several sections of the door to avoid breach tool damage on the door itself.