Aircraft Security Door Handling with Bridge Crane and Folding Pallet
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Solution Overview
Problem
The conventional method of transferring aircraft security doors, which weigh over 180 pounds, is cumbersome and prone to damage, requiring multiple personnel and limited space on aircraft service stair platforms.
Innovation Solution
The implementation of a specialized aircraft security door design and handling system, including a frame with a door panel, jams, and tamper-evident locks, along with a method using a bridge crane and a folding pallet structure for secure and efficient transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the security door is laid down on the pallet and moved from the pallet to the platform, then the door can be transferred to the aircraft, but the door may be damaged during handling
Solution Approach 1:
The door handling system is divided into distinct functional components: the pallet with support surfaces for stable positioning, the bridge crane for controlled lifting and positioning, and the platform for final placement. This segmentation allows each component to be optimized for its specific function, reducing overall handling complexity and damage risk
Solution Approach 2:
The bridge crane acts as an intermediary device between the pallet and the platform, providing controlled transfer of the heavy door. This intermediary mechanism eliminates the need for manual carrying and reduces the risk of damage during the transfer process
2Productivity
If the security door is transferred using a pallet and forklift, then the door can be moved to the aircraft service stair, but more than one person is required due to the door weight exceeding 180 pounds
Solution Approach 1:
The pallet and bridge crane are combined into an integrated handling system. The pallet provides stable support and positioning, while the bridge crane provides controlled lifting and positioning capabilities. This merged system handles the heavy door more efficiently than separate forklift and manual operations, reducing the need for multiple personnel
Solution Approach 2:
The manual mechanical system of multiple personnel carrying the door is replaced with a mechanized bridge crane system. This substitution provides controlled, precise movement of the heavy door and eliminates the need for multiple strong personnel to manually handle the 180+ pound door
3Area of stationary object
If the security door is transferred on a standard pallet, then the door can be moved, but the space on the aircraft service stair platform is reduced
Solution Approach 1:
The pallet is designed with foldable side rails that can be extended during door loading and then folded inward during door transfer. This dynamic configuration allows the pallet to provide full support during loading while minimizing platform space occupancy during the actual door transfer operation
Data Source
AI summary
The present disclosure provides an aircraft security door as well as methods, systems and apparatus for handling an aircraft security door. In one implementation, a method for installing an aircraft security door onto an aircraft is disclosed. The method includes transferring the aircraft security door to an aircraft service stair, supporting the aircraft security door by a bridge crane coupled to the aircraft service stair, positioning the aircraft service stair in proximity to a fuselage of the aircraft adjacent to an opening in the fuselage, positioning the aircraft security door relative to the opening using the bridge crane, and securing the aircraft security door to the opening.