Retractable Cargo Deck Entrance Guides for Clear Pallet Loading
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Solution Overview
Problem
Existing cargo aircraft guide systems either encroach on the working volume with non-retractable guides or require special tools for retractable mechanisms, posing hazards and inefficiencies during on-ground loading and aerial operations.
Innovation Solution
The development of retractable guide assemblies that self-center pallets during loading, stow flush with the cargo deck when not in use, and operate without the need for special tools, ensuring a clear working area and safe personnel movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-retractable guides are used above the cargo area deck, then guidance function is provided, but the working volume of the cargo aircraft is encroached upon
Solution Approach 1:
The guide assembly is designed to be movable between a deployed position (providing guidance function) and a retracted position (preserving working volume). The guide can be manually repositioned by ground personnel using the handle, allowing dynamic adaptation between operational and storage states.
Solution Approach 2:
The guide assembly utilizes vertical dimension for deployment and retraction, moving from above the cargo floor (deployed) to below the cargo floor (retracted). This dimensional transition allows the guide to provide function when needed while eliminating obstruction when not in use.
2Volume of stationary object
If retractable guide mechanisms are used, then working volume is preserved, but special hand tools are required for handling operations
Solution Approach 1:
The guide assembly is designed to be manually operable by ground personnel without requiring special tools. The handle provides a direct mechanical interface for personnel to reposition the guide, making the system self-servicing and eliminating dependency on specialized equipment.
Solution Approach 2:
The complex locking and unlocking mechanisms found in prior art are replaced with a simple handle-based manual operation system. This extraction of complexity allows ground personnel to operate the guide using basic hand strength rather than requiring special tools.
3Reliability
If guides are located above the cargo floor, then guidance function is available, but personnel movement and cargo operations are obstructed
Solution Approach 1:
The guide assembly transitions from a static above-floor position to a dynamic system that can be retracted below the cargo floor. This allows the guide to be present when needed for loading operations and absent when personnel need to move freely on the cargo deck.
Solution Approach 2:
The guide assembly is extracted from the cargo workspace by retracting it below the cargo floor. This removes the potential hazard and obstruction to personnel movement while preserving the guidance function for cargo loading operations.
4Stability of the object's composition
If mechanical stops are provided above the cargo floor to prevent longitudinal displacements, then load stability is improved, but working volume is reduced
Solution Approach 1:
The mechanical stop system is designed to be deployable and retractable. During loading operations, the guides are in the deployed position providing both guidance and stability. When loading is complete, the guides can be retracted to restore full working volume while the pallet locks remain engaged to maintain load stability.
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 retractable guide assemblies effectively self-center pallets, eliminate the need for special tools, and maintain a clear cargo deck, enhancing operational safety and efficiency during both ground and aerial operations.
Implementation Method 1
a first torsion spring biased to rotate the splined shaft to the deployed position
Implementation Method 2
the latch lever is engaged with the handle when the guide assembly is in the stowed position
Implementation Method 3
an angularly sloped guide surface configured to provide resistance to movement of a cargo load pallet in the longitudinal direction
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
Retractable guide assemblies are provided to guide cargo load pallets onto a cargo deck of a cargo aircraft, the guide assembly having a support subassembly comprising a recessed housing box, a moveable guide subassembly pivotally connected to the support subassembly so as to be pivotally moveable relative thereto, and an actuator subassembly operatively interconnecting the moveable guide subassembly and the support subassembly. The actuator subassembly may thereby allow the moveable guide subassembly to be pivotally moveable between (i) a releasably locked stowed condition, (ii) a releasably locked deployed condition and (iii) a freely moveable unlocked maintenance condition.