Elevator Car Frame Lifting Device Guide Rail Integration
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Solution Overview
Problem
The existing methods for lifting elevator devices, such as hoisting machines, often require increased installation time and cost, and may necessitate extending the hoistway size due to the need for a significant lifting margin, which complicates the calculation of overhead dimensions and increases labor and equipment requirements.
Innovation Solution
An elevator lifting device comprising a guide rail from the lower portion to the top of the hoistway, a car frame that can move up and down along the guide rail, and a lifting machine that lifts the car frame to the top portion, with a suspension point positioned above the center of gravity to minimize the impact of the lifting margin on the hoistway size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a chain block is used to lift the device, then the device can be lifted to the top portion of the hoistway, but the lifting margin requires increased hoistway size and installation space
Solution Approach 1:
The guide rail is installed first along the hoistway before the lifting operation. The car frame is then positioned on the guide rail and used as the lifting platform. This preliminary preparation allows the lifting margin to be minimized since the car frame itself becomes part of the lifting system rather than requiring separate lifting equipment with additional margin requirements.
Solution Approach 2:
The car frame is given dual functionality: it serves both as the elevator car structure and as the lifting platform. By making the car frame universal, the patent eliminates the need for separate lifting platforms or additional lifting margin, thereby reducing the required hoistway size while maintaining lifting capability.
2Reliability
If the suspension portion is positioned higher than the center of gravity, then the device is prevented from overturning, but the lifting margin increases the required hoistway overhead dimension
Solution Approach 1:
The guide rail is preliminarily installed along the entire hoistway before the lifting operation begins. This preliminary installation provides a fixed reference structure that allows the suspension portion to be optimally positioned relative to the center of gravity during the lifting process, ensuring stability without requiring excessive overhead dimension.
Solution Approach 2:
The guide rail acts as an intermediary structure between the lifting machine and the car frame. It provides a stable guide that allows the suspension portion to be positioned at the optimal height above the center of gravity for preventing overturning, while the guide rail itself absorbs the dimensional requirements, preventing direct increase in the hoistway overhead dimension.
3Productivity
If specialized lifting platforms are used, then the lifting operation can be performed, but installation time and labor requirements increase
Solution Approach 1:
The car frame is designed to serve dual purposes: as the elevator car and as the lifting platform. This universality eliminates the need for separate specialized lifting platforms, thereby reducing installation time and labor requirements while maintaining the ability to perform lifting operations effectively.
Solution Approach 2:
The patent merges the car frame structure with the lifting platform function into a single integrated component. By combining these two functions, the patent eliminates the need for additional lifting equipment and reduces the overall installation complexity and time required compared to using separate specialized lifting platforms.
Data Source
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AI summary
A lifting device 100 comprising a guide rail 8 that is arranged from a lower portion 81 to the top portion 51 of the hoistway 5; a car frame of elevator 7 that is capable of going up and down, guided by the guide rail 8, by providing a guide shoe 9 engaging with the guide rail 8, and that is used as a platform placing the weight 1 for lifting to the vicinity of the top portion 5a of the hoistway 5; and a lifting machine 3 that lifts the car frame 7 placing the weight 1 to the top portion 5a, guided by the guide rail 8. Based on this, a labor of tool dismantling can be eliminated.