Triple Latching Scaffold Member with Independent Triggers
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Solution Overview
Problem
Conventional scaffolding systems pose safety hazards during erection due to the design of their components, which hinder the effective use of safety harnesses and can lead to falls, especially when the scaffold tilts, as the distal end of the horizontal member remains uncoupled until the worker traverses the platform, leaving the installer vulnerable.
Innovation Solution
A scaffold system with primary, secondary, and tertiary release triggers allows simultaneous connection and disconnection of the horizontal member's ends to a vertical member, preventing inadvertent disconnection by decoupling the primary trigger from the cable, enabling independent operation of the secondary trigger and providing a contrasting color for the tertiary trigger to differentiate its function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional scaffold components are used with sequential erection techniques, then safety harnesses can be used during erection, but the distal end of the horizontal member remains uncoupled until the worker traverses the platform, leaving the installer vulnerable to falls
Solution Approach 1:
The latching mechanism is divided into multiple independent latches (first latch and second latch) that can be operated separately. Each latch can be engaged or disengaged independently through its own trigger, allowing the worker to secure the distal end without traversing the platform, thereby eliminating the vulnerability to falls while maintaining operational simplicity.
2Ease of operation
If a single trigger mechanism is used to latch both ends of the horizontal member, then the coupling operation is simplified, but inadvertent disconnection of the horizontal member may occur
Solution Approach 1:
The single trigger mechanism is segmented into two independent triggers (first trigger and second trigger), each controlling its own latch. This segmentation prevents inadvertent disconnection because each latch must be deliberately actuated by its corresponding trigger, while still maintaining operational simplicity through the use of triggers rather than complex locking mechanisms.
Solution Approach 2:
A cable connects the first trigger to the second latch, acting as an intermediary mechanism. When the first trigger is actuated, it disengages the first latch and simultaneously actuates the second latch through the cable, providing a controlled and deliberate disconnection process that prevents inadvertent release while maintaining ease of operation.
3Reliability
If multiple triggers are provided for independent control of each latch, then inadvertent disconnection is prevented, but the device complexity increases
Solution Approach 1:
The first trigger and second latch are merged through the cable connection, allowing a single trigger action to control two latches. This merging reduces the overall device complexity by eliminating the need for completely independent trigger-latch pairs while still maintaining the ability to prevent inadvertent disconnection through deliberate trigger actuation.
4Ease of manufacture
If the horizontal member is coupled to vertical members sequentially, then the installation process is straightforward, but the installation time increases
Solution Approach 1:
The latching mechanism is designed with triggers that can be actuated in advance or simultaneously, allowing the worker to secure multiple latches before completing the entire installation sequence. This preliminary action capability reduces installation time while maintaining the straightforwardness of the installation process through the use of simple trigger operations.
Data Source
AI summary
A horizontal scaffold member having a primary end connector and a secondary end connector. Each end connector is configured to couple to a cup or rosette on a vertical scaffold member. Each end connector includes a wedge assembly having a handle and a wedge, movable with respect to the connector to a latched and unlatched position. The primary wedge assembly has a primary and tertiary handles, with the tertiary handles connected to the secondary wedge assembly by a cable, and configured so that moving the primary and tertiary handles simultaneously to an unlatched position also moves the secondary wedge assembly to an unlatched position.