Elevator Guide Rail Connection for Smooth Shaft Changes
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Solution Overview
Problem
Existing elevator systems face challenges in ensuring safe and convenient shaft changes of elevator cars, particularly at transitions between vertically and horizontally displaced guide rails, where offsets can cause jolts, damage, or disengagement of the runner.
Innovation Solution
The elevator system employs a connecting device that aligns and securely connects the vertical guide rail piece of the horizontal displacement unit with the stationary vertical guide rail, using a bolt and recess mechanism, ensuring precise alignment and preventing horizontal displacement during transitions, with actuator control and sensor verification for safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a horizontal displacement unit with a vertical guide rail piece is used to enable shaft changes, then the elevator car can be moved between vertical tracks, but offsets between the guide rail piece and stationary guide rails can cause jolts and damage
Solution Approach 1:
A connecting device acts as an intermediary between the vertical guide rail piece and the stationary guide rails. This device includes a connecting element that positively connects to the stationary guide rail, ensuring precise alignment and preventing offsets during the transition between vertical and horizontal guide sections.
Solution Approach 2:
The connecting device is activated before the elevator car completes its transition to ensure the vertical guide rail piece is properly aligned with the stationary guide rail. This preliminary alignment action prevents jolts and damage by establishing correct positioning in advance of the car's arrival at the transition point.
2Manufacturing precision
If the vertical guide rail piece is fixed to prevent horizontal displacement, then alignment precision improves, but the horizontal displacement unit loses its ability to move horizontally
Solution Approach 1:
The connecting device is designed to be dynamically controllable, transitioning between a locked state that prevents horizontal displacement (ensuring alignment precision) and an unlocked state that allows horizontal movement (enabling shaft changes). This dynamic control resolves the contradiction by providing both immobility for precision and mobility for operation as needed.
Solution Approach 2:
The system changes the positional parameter of the vertical guide rail piece from mobile to fixed state through the connecting device. By controlling the connection state (connected vs. disconnected), the system dynamically adjusts the horizontal position parameter, enabling both precise alignment when connected and horizontal mobility when disconnected.
3Reliability
If a connecting device is introduced to align the guide rails, then operational safety improves, but the device complexity increases
Solution Approach 1:
The connecting device is designed as a separate, extractable component that can be independently controlled and maintained. By extracting the alignment function into a dedicated connecting device rather than integrating it into the main car structure or guide rail system, the complexity is localized and manageable, while operational safety is significantly improved through positive connection.
Data Source
AI summary
An elevator system has an elevator car that can travel vertically along a vertical track including a stationary vertical guide rail, and that can travel horizontally by a car transfer device. The car transfer device has a horizontal displacement unit with a vertical guide rail piece that guides the elevator car in the horizontal displacement unit, the horizontal displacement unit being movable into a transit position in which the guide rail piece and the stationary vertical guide rail together form a section of the vertical track. The elevator system has a connecting device by which, in the transit position of the horizontal displacement unit, the vertical guide rail piece can be connected to the stationary vertical guide rail, wherein, when connected by the connecting device, the vertical guide rail piece cannot be displaced in the horizontal direction with respect to the stationary vertical guide rail.