Extendable Line Roller Assembly for Parapet Wall Clearance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing line rollers for hoisting or lowering lines, cables, or cords on structures face issues as they often rub against outer walls, getting hung up on obstructions like doors, windows, and balconies, making it difficult to direct the lines over parapet walls and rollers.
Innovation Solution
A line roller assembly with a clamping mechanism and a carriage assembly featuring extendable arms with rollers, allowing the lines to be guided over the parapet wall without contacting the outer or inner edges, using alignment guides for precise positioning and optional motorization for ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If lines are directed over the parapet wall using conventional line rollers, then the line roller can be positioned close to the wall, but the lines rub against the outer wall and get hung up on obstructions like doors, windows, and balconies
Solution Approach 1:
The patent extends the line roller assembly outward from the parapet wall using an extendable arm mechanism, moving the roller into a different spatial dimension (away from the wall) to eliminate contact with obstructions on the wall surface while maintaining the line routing function
2Object-affected harmful factors
If the line roller is positioned far from the parapet wall to avoid obstructions, then lines can move freely, but the structural support and stability are compromised
Solution Approach 1:
The line roller assembly is divided into separate functional components: a clamping mechanism that attaches to the parapet wall, an extendable arm that provides distance, and the roller itself. This segmentation allows the stabilizing function to remain at the wall while the line-guiding function operates at a distance from obstructions
Solution Approach 2:
The extendable arm acts as an intermediary element between the parapet wall and the line roller, providing both structural support from the wall and sufficient distance from wall obstructions to allow free line movement
3Device complexity
If a fixed line roller position is used, then the structure is simple, but the line cannot be directed away from obstructions on the wall
Solution Approach 1:
The line roller assembly incorporates an extendable arm with adjustable positioning capability, transforming the system from a fixed static structure to a dynamic one that can adapt its position to avoid obstructions while maintaining structural integrity through the clamping mechanism
Data Source
AI summary
A line roller assembly is provided including a base assembly including a clamping assembly configured to clamp the base assembly to a parapet wall surrounding a roof of a structure or other installation, a carriage assembly slidably mounted on the base assembly, said carriage assembly including at least one arm including a roller at a distal end, said carriage assembly movable between at least one extended position and a medial position, and said at least one roller includes a groove configured to receive a line for aiding the line over the parapet wall, wherein in the at least one extended position the at least one arm extends a pre-determined distance over an edge of an outer wall of the structure or the at least one arm extends a pre-determined distance over an inner edge of the parapet wall of the structure over the roof.