Elevator Tension Loop for Adaptable Lifting Height
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Solution Overview
Problem
Existing elevator systems that adapt to increasing building heights during construction often deform and weaken the wire rope structure due to tension means clamping apparatuses acting on loaded regions, which are later required as supporting or compensating means.
Innovation Solution
A method and elevator system using a flexible compensating tension means guided by a deflecting device with roller assemblies, allowing the compensating tension means to form a loop and reducing the distance between roller assemblies to release sufficient tension for lifting operations without deforming the wire rope structure, enabling multiple uses during construction and permanent operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If tension means clamping apparatuses are used to raise the drive platform during construction, then the lifting operation can be performed, but the wire rope structure is deformed and weakened
Solution Approach 1:
The patent extracts the harmful clamping action from the system by introducing a separate compensating tension means that does not require clamping the main supporting tension means. The compensating tension means is guided through deflecting rollers and can be adjusted independently without affecting the integrity of the wire rope structure used for supporting the elevator car and counterweight.
Solution Approach 2:
The patent segments the tension means system into distinct functional components: supporting tension means for carrying loads, and compensating tension means for balancing weight differences. This segmentation allows each component to perform its specific function without interfering with the other, preventing deformation of the supporting wire rope structure.
2Device complexity
If the same tension means is used both as supporting means and compensating means, then device complexity is reduced, but the tension means must be clamped and released multiple times causing deformation
Solution Approach 1:
The patent divides the tension means system into two separate functional subsystems: supporting tension means that remains fixed and carries structural loads, and compensating tension means that is adjustable and balances weight differences. This segmentation eliminates the need to clamp and release the same tension means repeatedly, preserving its structural integrity while maintaining system functionality.
Solution Approach 2:
The patent introduces deflecting rollers as intermediary elements that guide the compensating tension means without requiring clamping of the supporting tension means. These rollers act as mediators that enable the compensating function while protecting the supporting wire rope structure from deformation.
3Adaptability or versatility
If clamping apparatuses are used to adjust tension means during lifting operations, then the lifting height can be adapted, but individual wires and the overall wire rope structure are deformed
Solution Approach 1:
The patent extracts the adjustment function from the supporting tension means by introducing a separate compensating tension means that handles all adaptation requirements. The supporting wire rope structure remains fixed and undisturbed, maintaining its manufacturing precision and structural integrity, while the compensating tension means is adjusted as needed for lifting height adaptation.
Solution Approach 2:
The deflecting rollers serve as intermediary elements that enable the compensating tension means to be adjusted and routed without contacting or clamping the supporting tension means. This intermediary mechanism allows lifting height adaptability while protecting the wire rope structure from deformation.
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 solution prevents deformation and damage to the wire rope structure, allowing the elevator system to maintain its tensile load capacity after multiple lifting operations and continue using the same tension means throughout the construction and operational phases without reduction.
Implementation Method 1
reducing the distance between the first roller assembly and the second roller assembly such that an amount of the compensating tension means sufficient for the performance of the lifting operation is released from the at least one compensating tension means loop
Data Source
AI summary
A method for constructing an elevator system in a building includes performing at least one lifting operation to adapt a usable lifting height of the elevator system to an increasing height of the building. A drive platform supporting an elevator drive machine and, by a flexible support, an elevator car and a counterweight is raised during the lifting operation. A difference between an elevator-car-side support weight and a counterweight-side support weight is substantially compensated by a compensating tension device guided from a bottom side of the elevator car to a bottom side of the counterweight by a deflecting device including two roller assemblies having deflecting rollers forming a compensating tension loop. A distance between the roller assemblies is reduced before and/or during the lifting operation such that an amount of the compensating tension device required for the performance of the lifting operation is released from the compensating tension loop.