Segmented Step Band Guard for Passenger Conveyor Maintenance
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Solution Overview
Problem
Conventional step band guards for passenger conveyors are inefficient as they block the entire turnaround section, requiring workers to repeatedly enter and exit the access area to move the step band, increasing labor and time during maintenance and assembly processes.
Innovation Solution
A step band guard comprising two distinct panels, where one panel remains in place to block access partially while allowing sufficient access for tasks, and the second panel can be removed to facilitate movement of the step band without needing to lift the entire guard, reducing labor and time requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional step band guard blocks the entire turnaround portion, then safety protection is improved, but access efficiency deteriorates
Solution Approach 1:
The step band guard is divided into multiple panels (first panel, second panel, third panel) that can be independently positioned. The first panel remains in place to provide safety protection, while the second panel is removed to create an access opening, and the third panel provides additional protection. This segmentation allows simultaneous maintenance of safety and access efficiency.
2Productivity
If the entire step band guard is removed to access components, then access efficiency is improved, but safety protection deteriorates
Solution Approach 1:
Only the second panel is extracted and removed from the guard assembly to create the necessary access opening. The first and third panels remain in place to continue providing safety protection. This selective extraction maintains safety while enabling access efficiency.
3Device complexity
If a single-piece step band guard is used, then device complexity is reduced, but operational flexibility deteriorates
Solution Approach 1:
The guard is segmented into multiple panels connected by securing connections, enabling flexible configuration. Panels can be independently positioned, removed, or repositioned based on operational needs while maintaining overall structural integrity through the securing connections.
Solution Approach 2:
The guard transitions from a static single-piece structure to a dynamic multi-panel assembly where panels can be independently positioned and reconfigured. The securing connections allow the structure to adapt between different operational states (full protection, partial access, full access).
Data Source
AI summary
A step band guard for use of a passenger conveyor includes a first panel comprising a first piece of material. A second panel comprises a second piece of material that is distinct and separate from the first piece of material. A securing connection allows for selectively securing the panels together. The first panel can be strategically left in place for blocking access to at least a portion of a step band near a turnaround. The second panel can be selectively put in place when blocking access to the entire step band at the turnaround is desired. The first panel allows for some access to the step band and allows an individual to move the step band without having to have the entire step band guard in place.