Construction Elevator Roping Layout for Faster Jump Re-Roping
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Solution Overview
Problem
The time-consuming process of removing and re-roping elevator suspension ropes during construction jumps in high-rise buildings hinders the efficient extension of elevator travel length, necessitating a more efficient method to facilitate quicker installation and use during construction.
Innovation Solution
Employing high friction coated suspension roping with smaller bending radii and folding pulleys of reduced diameter on the elevator car roof, allowing for easier re-roping and eliminating the need for additional safety rails, thus simplifying the extension of elevator travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional steel ropes and large-diameter folding pulleys are used during construction jumps, then the elevator can be suspended and moved, but the re-roping process becomes time-consuming and complex
Solution Approach 1:
The patent applies parameter changes by switching from traditional steel ropes with large-diameter folding pulleys to synthetic fiber ropes with small-diameter folding pulleys. This parameter change in rope material and diameter significantly reduces the time required for re-roping operations during construction jumps, directly addressing the productivity-time contradiction.
Solution Approach 2:
The patent employs synthetic fiber ropes that can be quickly installed and removed during construction jumps, treating the roping system as a temporary, easily replaceable component rather than a permanent installation. This approach minimizes the time and effort required for re-roping operations.
2Loss of time
If small-diameter folding pulleys are used on the car roof, then re-roping time is reduced, but safety clearance requirements may be affected
Solution Approach 1:
The patent changes the rope material parameter from steel to synthetic fiber, which has different mechanical properties including lower stiffness and different safety clearance requirements. This parameter change allows the use of small-diameter folding pulleys while maintaining adequate safety clearances between the car roof and hoistway walls.
3Length of moving object
If the elevator travel length is extended during construction, then more floors can be served, but the jump operation becomes more complex
Solution Approach 1:
The patent changes the rope material parameter to synthetic fiber, which has different mechanical properties including lower stiffness and different safety clearance requirements. This parameter change allows the use of small-diameter folding pulleys while maintaining adequate safety clearances.
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
This approach speeds up the elevator installation process by reducing the time required for re-roping, enabling earlier completion and handover to customers, while ensuring safety compliance without additional safety rails.
Implementation Method 1
high friction coated suspension roping mounted on first and second rope suspenders
Implementation Method 2
a smaller bending radius of the high friction coated suspension roping is adapted to cooperate with the small or reduced diameter of the first folding pulleys
Data Source
AI summary
An elevator construction arrangement includes: a hoistway; an elevator car, a counterweight, car guide rails, and counterweight guide rails; an elevator hoisting machinery and a high friction coated suspension roping mounted on first and second rope suspenders and arranged to suspend the car and the counterweight during construction time use; a protection deck mounted within the hoistway during an elevator jump operation in the hoistway; a hoist device configured to move the car or at least parts of the car below the protection deck, the car being guided on the car guide rails. The arrangement includes, arranged on top of the car, a first folding pulley beam with first folding pulleys having a small or reduced diameter, and a smaller bending radius of the high friction coated suspension roping is adapted to cooperate with the small or reduced diameter of the first folding pulleys.