Aircraft Security Door Bridge Crane Handling System
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Solution Overview
Problem
Conventional methods for handling aircraft security doors, which weigh over 180 pounds, are cumbersome and prone to damage due to reduced space and weight issues, requiring multiple personnel for transfer and often causing damage during handling.
Innovation Solution
A bridge crane system is introduced to support and transfer the aircraft security door, featuring a frame with posts, X and Y direction rail members, a movable trolley, and a brake assembly, allowing secure and controlled movement along the aircraft service stair, reducing the need for manual handling and minimizing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the security door is laid down on the pallet and moved manually, then the door can be transferred to the platform, but the door weight exceeds 180 pounds requiring more than one person and risking door damage
Solution Approach 1:
The patent introduces a bridge crane as an intermediary device between the pallet and the platform. The crane's trolley system with brake assembly acts as a mediator to lift and position the heavy security door, eliminating the need for manual handling of the 180+ pound door while preventing damage during transfer.
2Productivity
If the security door is transferred manually from the pallet, then the door can be moved to the platform, but the reduced space on the platform and door weight cause difficulties and potential damage
Solution Approach 1:
The bridge crane serves as an intermediary lifting mechanism that operates within the limited platform space. The trolley system moves along rails mounted on the platform, providing a compact yet effective solution for transferring the door without requiring extensive manual maneuvering that could cause damage.
Solution Approach 2:
The bridge crane system is segmented into modular components: the frame structure, the trolley assembly, and the brake mechanism. This segmentation allows the system to be compact for platform installation while maintaining the capability to handle the full door weight safely.
3Reliability
If multiple personnel are used to transfer the door, then the door can be moved safely, but the process becomes cumbersome and time-consuming
Solution Approach 1:
The bridge crane system performs the door transfer operation autonomously without requiring multiple personnel. The motorized trolley with brake assembly self-regulates the lifting and positioning process, reducing the transfer operation from a multi-person manual task to a single-operator control task, thereby saving time while maintaining safety.
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.