Telescoping Guardrail Flip Door for Aircraft Assembly Safety

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Solution Overview

Problem

The frequent handling of heavy removable guardrails during aircraft assembly poses risks of repetitive lift injuries and falls, as personnel manually install and remove them to ensure safety and clearance for airplane movement along the production line.

Innovation Solution

A system featuring a bracket with a rotatable flip door and extendible guardrail, coupled via a telescopic linkage and locking mechanism, allowing for adjustable configurations between raised and platform positions, which can be operated manually, mechanically assisted, or fully automated using a remote controller to reduce manual handling and enhance safety.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If removable guardrails are manually installed and removed to provide clearance for airplane movement, then safety during pulsing is improved, but repetitive lift injuries and fall risks increase

Engineering Contradiction:
Improvesafety during pulsingVSAvoidrepetitive lift injuries and fall risks
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The guardrail and flip door are merged into a single integrated assembly that moves together as one unit. The guardrail is attached to the flip door structure, so when the flip door rotates to provide clearance during pulsing, the guardrail moves with it automatically, eliminating the need for separate manual handling of guardrails

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The system transitions from static guardrails that must be manually installed and removed to a dynamic integrated assembly that automatically adjusts its position. The flip door and guardrail assembly rotates between operational and clearance positions, providing adaptive safety without repetitive manual intervention

Inventive Principle:
Principle #15Dynamics

Solution Approach 3:

The guardrail is pre-installed on the flip door structure before pulsing operations begin. This preliminary attachment ensures that when the flip door rotates to provide clearance, the guardrail is already in position and moves with it, preventing the need for last-minute manual installation or removal

Inventive Principle:
Principle #10Preliminary action

2Reliability

If guardrails are manually handled to ensure safety, then fall protection is improved, but handling time and operational efficiency decrease

Engineering Contradiction:
Improvefall protectionVSAvoidoperational efficiency
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The guardrail and flip door operations are merged into a single integrated action. By attaching the guardrail to the flip door structure, both safety protection and platform adjustment are achieved in one motion, eliminating the separate steps of manually installing and removing guardrails

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The system performs its own safety function automatically through the integrated design. When the flip door is operated to provide clearance or access, the attached guardrail automatically provides fall protection without requiring separate manual intervention, making the system self-sufficient for safety operations

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS11512477B2Telescoping guardrail/flip door
Publication Date: 2022.11.29 THE BOEING CO
  • US11512477B2 patent drawing
  • US11512477B2 patent drawing
  • US11512477B2 patent drawing

AI summary

The present disclosure relates systems and methods involving movable/adjustable platforms and/or guardrails. An example system a bracket configured to be coupled to a fixed structure having a walking surface and a flip door portion rotatably coupled to the bracket. The system also includes a guardrail portion extendibly coupled to the flip door portion and a telescopic linkage further coupling the flip door portion to the guardrail portion. The system additionally includes a locking mechanism with a locking pin. The locking pin is configured to maintain the flip door portion in a raised configuration. The system is configured to be adjusted between the raised configuration and a platform configuration.