Integrated Climb Assist and Fall Arrest System
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Solution Overview
Problem
Existing climb assist and fall arrest systems for high-elevation applications are typically separate devices that are difficult to integrate, leading to installation challenges and inefficiencies, particularly in non-vertical ascent scenarios, and often require significant frictional force to maintain traction, which can result in loss of traction and safety issues.
Innovation Solution
An integrated climb assist and fall arrest system comprising a static guide member, a motor-driven climb assist belt, and a controller that dynamically adjusts the upwards force based on user metrics, preventing downward movement by locking to the static guide member upon detecting threshold velocity or acceleration, thus providing both assistance and safety in a single, unified system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate climb assist and fall arrest devices are used, then each device can be optimized for its specific function, but the system becomes complex and difficult to integrate
Solution Approach 1:
The patent combines climb assist and fall arrest devices into a single integrated system where both functions share common components such as the rope, sheave, and mounting structure. The climb assist mechanism uses a motor to rotate the sheave to provide upward force, while the fall arrest function is achieved through friction between the rope and sheave that automatically engages during a fall, eliminating the need for separate devices and reducing system complexity.
Solution Approach 2:
The integrated system allows the same mechanical components to serve multiple functions: the sheave acts as both a drive element for climb assist and a friction element for fall arrest, the rope serves as both the climb assist medium and fall arrest line, and the motor provides both the driving force for ascent and the friction control for fall prevention, thereby achieving multi-functionality without increasing device count.
2Force
If significant frictional force is required between rope and sheave to maintain traction, then driving force is effectively transmitted, but traction is lost and safety issues occur
Solution Approach 1:
The system dynamically adjusts the frictional force between the rope and sheave based on operational conditions. During normal climb assist operation, the motor controls the sheave rotation to provide adequate friction for force transmission. During a fall event, the system automatically increases friction to engage fall arrest, and the friction level is continuously adjusted based on the climber's weight and ascent speed, preventing both slippage and excessive grip that could cause safety issues.
3Ease of manufacture
If rope diameter varies at spliced portions, then rope ends can be joined to form continuous loops, but additional elements are required to maintain traction
Solution Approach 1:
The patent modifies the sheave geometry to accommodate variations in rope diameter. The sheave is designed with a broader contact surface and adjusted curvature that can maintain adequate friction and traction even when the rope diameter changes at spliced portions. This parameter change in the sheave design eliminates the need for additional traction-maintaining elements while still allowing continuous loop formation through splicing.
4Adaptability or versatility
If climb assist and fall arrest systems are installed on non-vertical surfaces, then application versatility is improved, but installation difficulty and contact point complexity increase
Solution Approach 1:
The integrated system's mounting structure is designed to accommodate various surface orientations including vertical, inclined, and horizontal surfaces. The same mounting brackets and attachment mechanisms used for vertical installations can be adapted for non-vertical applications by adjusting the mounting angle and position, eliminating the need for separate installation hardware or procedures for different surface types.
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 integrated system enhances safety by reducing fall distances and velocities, allows for easier installation on non-vertical surfaces, and maintains traction through dynamic force adjustment, improving user safety and system efficiency in high-elevation applications.
Implementation Method 1
a motor and sheave to provide an upwards force to the rope
Implementation Method 2
require significant frictional force between the rope and the sheave to convey the driving force from the motor
Implementation Method 3
prevent downward movement in the event of a fall by locking to the static guide member
Data Source
AI summary
A device for joining a first rope to a second rope comprises a first end cap and a second end cap. The first end cap is configured to receive a first end of the first rope therein. The second end cap includes a first opening defining an anulus to receive a first end of the second rope therein. The anulus has a body diameter. The first opening has an outer diameter. The second end cap further comprises a second opening defining a cavity configured to receive a link. The cavity has an anulus diameter, wherein the anulus diameter is a greatest internal diameter of the cavity. The anulus diameter is greater than the body diameter and less than the outer diameter and the link is configured to link the first end cap to the second end cap.