Door Holding Device With Quick-Release Clamp for Firefighting
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Solution Overview
Problem
Conventional door holding devices used in firefighting operations fail to securely fix doors in place against forces from fire hoses and lack efficient mechanisms for rapid removal, leading to uncontrolled airflow and rapid fire progression, posing risks to firefighters and civilians.
Innovation Solution
A door holding device with a first arm assembly, a second arm assembly, and a movable clamping mechanism that securely attaches to a structure, allowing for adjustable door positioning to control airflow and facilitate quick release during emergencies, incorporating a pivoting mechanism and quick-release handle for easy disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional wooden or plastic triangular wedge is used to control the door, then the device is simple in structure, but it fails to securely fix the door in place while resisting force from fire hoses and lacks means for efficient and rapid removal
Solution Approach 1:
The door holding device is divided into multiple functional components: a body assembly with clamp members, a pivot mechanism connecting first and second clamp devices, and a quick-release handle mechanism. This segmentation allows each component to perform its specific function while maintaining overall system reliability without excessive complexity.
Solution Approach 2:
The device incorporates a pivot mechanism that allows the first and second clamp devices to dynamically adjust and adapt to the door frame geometry, enabling secure attachment while maintaining structural integrity under varying forces from fire hoses.
2Ease of operation
If a conventional wedge is used for door control, then the device is easy to manufacture, but it offers little assurance of fixing the door against forces from fire hoses and provides no means for rapid removal
Solution Approach 1:
The quick-release handle mechanism serves as an intermediary component that enables rapid removal of the device without requiring complex tools or procedures. The handle actuates a release mechanism that disengages the clamp members from the door frame, allowing firefighters to quickly remove the device during emergency egress.
Solution Approach 2:
The quick-release functionality is extracted as a separate, dedicated mechanism within the device. The handle and its associated release mechanism are designed as distinct components that can be independently operated to rapidly disengage the clamping action, providing efficient removal capability.
3Object-affected harmful factors
If the door is left uncontrolled or partially open during firefighting operations, then airflow is unrestricted allowing firefighter access, but fire, heat and smoke spread rapidly toward the firefighters
Solution Approach 1:
The device applies clamping force at specific locations on the door frame through the clamp members, creating localized secure attachment points. The pivot mechanism allows the clamp devices to adapt to the local geometry of the door frame, ensuring reliable attachment while maintaining the ability to control door position for airflow management.
Data Source
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AI summary
A door holding device and system is disclosed that holds a door in a partially open configuration. The door holding device includes a first arm assembly that attaches to a door frame, a second arm assembly that attaches to a door, a movable clamping mechanism that clamps the first arm assembly to the door frame, and a pivot device that allows the first arm assembly and the second arm assembly pivot with respect to each other.