Elevator Rope Installation Guides for Cambered Wheel Alignment
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Solution Overview
Problem
The installation of elevator ropes, particularly those that are rod-like and elastically bendable, poses challenges due to their tendency to straighten, making them difficult to handle and guide around rope wheels, especially when the guidance by rope wheels is not strong, and requires a long contact and firm pressure for proper installation.
Innovation Solution
An arrangement and method involving detachable rope guides with guide rollers that converge and diverge the ropes vertically around the rope wheels, ensuring a long contact length and firm pressure, even without tension, to facilitate the guidance of ropes with a cambered shape and address the straightening tendency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If rod-like elastically bendable ropes are used, then the ropes self-reverse back to straight form after bending, but the ropes become difficult to handle and guide around rope wheels during installation
Solution Approach 1:
A guidance device with guide rollers is introduced as an intermediary between the rope and the rope wheel. The guide rollers constrain the rope's movement path and apply localized pressure to maintain contact with the rope wheel, mediating the conflict between the rope's elastic recovery tendency and the need for controlled guidance during installation.
2Manufacturing precision
If cambered rope wheels are used for guiding, then long contact and firm pressure between rope wheel and rope are achieved, but the installation becomes particularly challenging due to rope straightening tendency
Solution Approach 1:
The guidance function is segmented into multiple guide rollers arranged along the rope path. Each guide roller handles a specific section of rope guidance, reducing the complexity of guiding the entire rope length with a single cambered wheel and allowing modular adjustment during installation.
Solution Approach 2:
The guidance device with multiple guide rollers is set up in advance to create the proper geometric path for the rope before the actual installation begins. This preliminary positioning ensures that when the rope is fed through, it naturally follows the predetermined path with proper contact and pressure on the cambered rope wheel.
3Reliability
If strong guidance by rope wheels is used, then proper rope control is achieved, but ropes with straightening tendency require long contact length and firm pressure that are difficult to maintain
Solution Approach 1:
Guide rollers serve as intermediary elements that transfer and distribute the control force from the installation operator to the rope. These rollers maintain firm pressure on the rope at multiple points, ensuring reliable control and long contact length with the rope wheel without requiring the operator to directly apply large forces.
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 solution effectively guides ropes to maintain accurate positioning and compression against the rope wheels, enabling reliable installation even without significant rope tension, and is adaptable to various elevator systems.
Implementation Method 1
firm pressure between the rope wheel and the rope
Implementation Method 2
contact length and firm pressure between the rope wheel and the rope being installed
Implementation Method 3
ropes are rod-like and take a straight form when in rest state... elastically bendable, whereby the rope self-reverses back to a straight form from bent form in rest state after all bending directed to it ceases
Data Source
AI summary
An arrangement for installing a set of elevator ropes includes one or more rope reels storing the set of elevator ropes, a rope wheel arrangement mounted on a fixed base comprising one or more rope wheels, a first rope guide detachably mounted in proximity of said one or more rope wheels of the rope wheel arrangement, and a second rope guide detachably mounted in proximity of said one or more rope wheels of the rope wheel arrangement. The ropes of the set of elevator ropes are arranged to pass from the one or more rope reels to said one or more rope wheels of the rope wheel arrangement via the first rope guide, which is arranged to guide the ropes to converge a rim of said one or more rope wheels at least substantially vertically, to turn around said one or more rope wheels, and to pass away from the one or more rope wheels via the second rope guide, which is arranged to guide the ropes to diverge from a rim of said one or more rope wheels at least substantially vertically. A method for installing a set of elevator ropes uses the disclosed arrangement.