Height Safety Trolley for Smooth, Fail-Safe Rail Engagement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fall restraint and fall arrest systems for construction and maintenance personnel working at height do not provide continuous, smooth, and fail-safe operation during rope access and abseil.
Innovation Solution
A height safety trolley and modular rigid rail system with a die-cast alloy chassis, engagement mechanism, and braking mechanism, featuring a twist lock carabiner and sacrificial frail edge for fail-safe operation, ensuring secure attachment and controlled movement along rigid rails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing fall restraint and fall arrest systems are used, then basic safety function is provided, but continuous, smooth, and fail-safe operation is not achieved
Solution Approach 1:
The trolley incorporates a dynamic engagement mechanism with movable jaws that automatically adjust during operation. The braking mechanism features dynamic friction surfaces that adapt to load conditions, enabling smooth motion while maintaining fail-safe engagement under all operating conditions including falls.
Solution Approach 2:
The system implements preliminary engagement of backup safety mechanisms before actual fall events occur. The dual braking system pre-positions friction surfaces and engagement jaws in ready states, ensuring immediate fail-safe operation without interrupting smooth normal movement of the trolley along the rail.
2Ease of operation
If engagement mechanism is simplified for ease of use, then ease of operation improves, but reliability of secure attachment decreases
Solution Approach 1:
The engagement mechanism is designed to be self-verifying, where the act of engagement automatically triggers visual and mechanical confirmation that secure attachment has been achieved. The system self-tests engagement integrity through spring-loaded indicators and interlocked jaw positions, eliminating the need for separate verification steps while ensuring reliable attachment.
3Reliability
If braking mechanism is made more controlled for safety, then reliability improves, but device complexity increases
Solution Approach 1:
The braking mechanism uses friction surfaces as an intermediary between the trolley and rail to achieve controlled stopping. This friction-based intermediary provides progressive, adjustable braking force that is inherently smooth and controlled, avoiding complex mechanical linkages while maintaining high reliability through the simplicity and predictability of friction-based force application.
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
Ensures continuous, smooth, and fail-safe operation by preventing accidental disengagement and providing controlled movement, enhancing safety for workers at height.
Implementation Method 1
the connection arm provides visible fall arrest indication, by means of sacrificial frail edge deformation
Implementation Method 2
braking mechanism... providing controlled movement
Data Source
Figure 1
Figure 2~4
Figure 5~7
AI summary
A height safety trolley and modular rigid rail system for construction and maintenance personnel working at height is designed to allow continuous, smooth and fail-safe operation, for fall restraint and fall arrest, rope access and abseil. The height safety trolley has a connection arm, a clip body and a main chassis operably interfacing a rail engagement mechanism, movable between a rail engagement position to engage a rigid rail, and a disengagement position to disengage the rigid rail. The rail engagement mechanism may comprise integral pivot arms which close simultaneously inwards to engage the rigid rail and outwards to disengage the rail. As such, the trolley is easily and safely attachable and detachable at any position along the rigid rail.