Ladder Guardrail Locking Mechanism With Torsion Spring
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Solution Overview
Problem
Existing ladder guardrail systems lack a reliable and stable locking mechanism, posing safety risks due to inadequate structural support and ease of accidental disengagement.
Innovation Solution
A guardrail locking system comprising a U-shaped guardrail with hinges, slots, hinge center bolts, and a lock mechanism featuring first and second locks, a center rivet, stopper pins, and a torsion spring, which securely connects the guardrail to the side rails, allowing for rotational movement while maintaining stability and preventing accidental disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple guardrail connection is used, then ease of installation is improved, but reliability and stability deteriorate due to inadequate structural support
Solution Approach 1:
The guardrail connection system is divided into multiple functional segments: hinge mechanism for attachment, locking mechanism with movable and fixed locks, and spring mechanism for automatic engagement. Each segment performs a specific function, collectively achieving reliable connection while maintaining installation simplicity.
Solution Approach 2:
The spring mechanism automatically engages the movable lock with the locking pin when the guardrail is installed, eliminating the need for manual locking operations. The system self-activates upon installation, providing reliable locking without complex installation procedures.
2Stability of the object's composition
If a fixed rigid connection is used, then stability is improved, but adaptability deteriorates due to inability to rotate
Solution Approach 1:
The connection system transitions from static to dynamic by incorporating a hinge mechanism that allows rotational movement between the guardrail and side rail. The guardrail can rotate from a horizontal stored position to a vertical operational position, providing adaptability while maintaining stability when locked in position.
3Device complexity
If a simple connection without locking mechanism is used, then device complexity is reduced, but reliability deteriorates due to ease of accidental disengagement
Solution Approach 1:
The locking function is extracted as a separate, dedicated mechanism independent of the hinge connection. The movable lock and fixed lock work together to provide positive locking, preventing accidental disengagement while keeping the overall system relatively simple through modular design.
Solution Approach 2:
The spring mechanism pre-loads the movable lock into engagement with the locking pin, creating a preliminary locking action that prevents accidental disengagement. The spring force continuously maintains the locked state, counteracting any forces that might attempt to disengage the guardrail.
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 system provides a reliable and stable locking solution for ladder guardrails, ensuring safety by securely attaching the guardrail to the side rails, allowing for intended rotational movement while preventing accidental disengagement, thus enhancing user safety.
Implementation Method 1
a torsion spring, installed about the center rivet and including two ends, each of which being hooked to the first or second lock, so that the first or second lock is recovered toward the stopper pin after being released from a push on the guiding curve portion of the first or second lock
Data Source
AI summary
A ladder with a guardrail is provided. The U-shaped guardrail has a center arm portion and two side arm portions. Each slot is provided through a side arm portion and has an elongated oval shape. Each hinge center bolt is disposed through a slot and engages a side arm portion to a hinge rotatably. The guardrail lock is disposed at the side arm portion, and the guardrail lock comprises first and second locks, a center rivet, a pair of stopper pins, and a torsion spring. The first or second lock has a guiding curve portion, a circular locking portion, and a through-hole. The center rivet is queued through the through-holes and fixes the first and second locks to the side arm portion rotatably and fixed to the side arm portion. The first and second locks receives and is locked to locking pins on top portions of the side rail.