Lift Scaffold Falling Prevention Linkage for Short Fall Arrest
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Solution Overview
Problem
Existing falling prevention systems for attached lift scaffolds are passive, activating only after a fall occurs, leading to unpredictable and long falling distances and potential collapse, posing safety risks.
Innovation Solution
A falling prevention structure with a leveraged mechanism, featuring a hinge point, control and operating arms, and an extending falling prevention pin, which engages with a building object before a fall to disperse weight, preventing collapse by actively addressing potential failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If passive falling prevention systems are used, then the system activates only after a fall occurs, but the falling distance becomes unpredictable and long, leading to potential collapse
Solution Approach 1:
The falling prevention pin proactively engages with the building object before a collapse occurs, dispersing weight in advance. This preliminary action prevents the fall rather than reacting to it, reducing the falling distance to less than 42 mm compared to the unpredictable long falls with passive systems.
Solution Approach 2:
The leveraged mechanism with control and operating arms creates a counterbalancing force that opposes the potential collapse before it happens. The elastic restoring structure maintains the pin in a ready position to immediately counteract any downward movement, providing preliminary anti-action against the harmful falling motion.
2Reliability
If the falling prevention pin is always extended to engage with the building object, then weight is dispersed, but the structure becomes complex and operation is hindered during normal use
Solution Approach 1:
The falling prevention pin is designed to dynamically extend and retract based on operational needs. During normal scaffold operation, the pin retracts to avoid interference. When a failure is detected or anticipated, the pin extends to engage with the building object for weight dispersion, achieving both reliability and ease of operation through dynamic adaptability.
Solution Approach 2:
The pin is positioned and ready to engage in advance through the leveraged mechanism, but only actually engages when needed. This preliminary positioning without constant engagement allows the scaffold to operate smoothly while maintaining the capability for immediate weight dispersion when required.
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 structure effectively prevents falls and collapses by reducing the falling distance to less than 42 mm, ensuring safety by dispersing weight to the building object, thereby meeting industry standards and enhancing construction safety.
Implementation Method 1
an elastic restoring structure (7) and capable of extending and retracting
Implementation Method 2
on a leveraged structure (3) that can be stably connected to an attached lift scaffold body and is provided with a hinge point (4) in the middle, a control arm (2) is on one side of the hinge point (4), and an extension portion of the control arm (2) can be connected/matched with a lifting structure (1)
Data Source
AI summary
A falling prevention structure can be stably connected to an attached lift scaffold body and is provided with a hinge point in the middle. The control arm is on one side of the hinge point, and an extension portion of the control arm can be connected/matched with a lifting structure of the attached lift scaffold. An operating arm is on the other side of the hinge point, an extension portion of the operating arm is provided with a transition structure and connected to a falling prevention pin by the transition structure. The falling prevention pin is provided with an elastic restoring structure and is capable of extending and retracting, and the extending falling prevention pin can be inserted into a clamping and hanging structure in a falling prevention structure directly or indirectly fixed to a building object.