Recessed Scaffold Deck Latch Assembly to Prevent Trip Disengagement
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Solution Overview
Problem
Conventional scaffold deck latch designs pose a tripping hazard and are prone to accidental disengagement, which can lead to the deck shifting or becoming dislodged.
Innovation Solution
A twist latch assembly for a scaffold deck, featuring a shaft with a locking tab, a compressible bias element, and a collar, which secures the deck to the side rail by engaging with an edge recess on the deck, keeping the locking tab flush with or below the deck surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conventional deck latch extends above the top surface of the deck, then the latch can effectively prevent the deck from lifting off, but it presents a tripping hazard to workers
Solution Approach 1:
The harmful portion (the extending latch head) is extracted and replaced with a recessed configuration. The latch head is set flush with or below the deck surface, removing the tripping hazard while preserving the securing function through the recessed engagement with the deck board.
Solution Approach 2:
Instead of the latch extending outward to engage the deck, the design inverts this approach by having the latch recess into the deck surface. The engagement mechanism is reversed from an outward-protruding form to an inward-recessed form, eliminating the hazard while maintaining function.
2Reliability
If the conventional deck latch extends above the top surface of the deck, then the latch can effectively prevent the deck from lifting off, but a worker may accidentally kick and disengage the latch
Solution Approach 1:
The vulnerable protruding latch head that could be accidentally kicked is extracted and replaced with a recessed configuration. The latch head sits flush with or below the deck surface, removing it from the path of accidental kicks while maintaining its securing function through recessed engagement.
Solution Approach 2:
The design anticipates and prevents accidental disengagement by recessing the latch head below the deck surface, creating a physical barrier that prevents accidental kicks from reaching the latch mechanism. This preliminary protective arrangement prevents the harmful action before it can occur.
3Object-affected harmful factors
If the locking tab is recessed flush with or below the deck surface, then the tripping hazard is eliminated, but the latch mechanism becomes more complex
Solution Approach 1:
The latch head is nested within a recess in the deck surface, allowing it to sit flush or below the top surface. This nesting configuration eliminates the tripping hazard while the spring-loaded mechanism provides the necessary complexity to achieve the recessed positioning and maintaining engagement force.
Solution Approach 2:
The latch mechanism uses a spring-loaded dynamic system that allows the latch head to move between engaged and disengaged positions within the recess. This dynamic configuration enables the recessed design to function effectively, with the spring providing the force needed to maintain engagement while allowing for controlled movement.
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 twist latch assembly effectively secures the scaffold deck without presenting a tripping hazard and reduces the likelihood of accidental disengagement, ensuring the deck remains stable and securely in place.
Implementation Method 1
a compressible bias element (e.g., spring) that urges the shaft of the latch assembly downward relative to the side rail
Data Source
AI summary
A scaffold has latch assemblies that are configured to hold a deck of the scaffold against a side rail of the scaffold. The latch assemblies include a shaft that is configured to extend through slots in the side rail. A locking tab at the end of the shaft presses against the deck due to action of a spring that urges the shaft downward relative to the side rail. The deck advantageously has an edge recess that receives the locking tab. The edge recess may be sized so that lock tab is flush with or below the top surface of the deck. A collar is slidably disposed on the shaft and is interposed between the bias element and the locking tab and is configured to help prevent the bias element from becoming entangled in the slot. The disclosure also relates to related latch assemblies, side rail assemblies, and methods.