Elevator Support Brake Device for Controlled Shaft Installation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for installing elevator support means are prone to accidents due to the intrinsic weight increase during lowering, leading to the support means being drawn off the roller and potentially dropping into the shaft, as they are often cut to length matching the required conveying height, resulting in incomplete braking solutions.
Innovation Solution
A support means brake device is introduced between the support means roller and the elevator shaft, allowing independent braking and control of the intake speed, with a system comprising a traction pulley, band brakes, and a pressing roller to ensure secure holding and controlled movement, reducing the risk of accidents during installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the support means is lowered in the elevator shaft by way of a guide roller, then the support means can be introduced into the shaft, but the intrinsic weight constantly increases causing the support means to be automatically drawn off the roller and potentially drop into the shaft
Solution Approach 1:
A brake device is introduced as an intermediary component between the support means roller and the shaft. This brake device acts as a mediator to control the support means during lowering, providing a safety mechanism that prevents the support means from being drawn off the roller due to increasing weight, thereby resolving the contradiction between ease of operation and reliability
Solution Approach 2:
The brake device is configured to apply preliminary braking action to counteract the increasing intrinsic weight of the support means before it can cause the support means to slip off the roller. By anticipating the weight increase and applying counteracting braking force in advance, the system prevents the harmful effect of uncontrolled lowering
2Productivity
If the support means are cut to length in correspondence with the required conveying height, then the installation is optimized, but the support means can slip off the support means roller in the final phase
Solution Approach 1:
The brake device is designed to automatically adjust and maintain braking force throughout the lowering process. The brake lever is configured to self-regulate, eliminating the need for manual re-tightening even when the support means are cut to precise lengths. This self-service mechanism ensures continuous braking effectiveness regardless of the support means length
Solution Approach 2:
The brake device incorporates a feedback mechanism where the braking force is automatically adjusted based on the load conditions. As the support means are lowered and their weight changes, the brake system receives feedback and相应ly adjusts the braking force to maintain optimal control, preventing slippage in the final phase while maintaining installation efficiency
3Reliability
If a brake lever is used to press the brake jaw against the brake drum, then the support means roller can be braked, but the brake lever has to be actively released and tightened again, creating risk in borderline situations
Solution Approach 1:
The brake lever is designed with self-adjusting features that automatically maintain braking force throughout the operation. The mechanism includes self-tightening and self-release capabilities based on the operational phase, eliminating the need for manual intervention to re-tighten the brake. This self-service design maintains reliable braking capability while significantly improving ease of operation by removing repetitive manual adjustments
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 support means brake device effectively prevents accidents by providing reliable braking and controlled speed regulation, ensuring safe and efficient installation of support means into the elevator shaft, reducing the risk of slippage and dropping, and eliminating the need for active re-tightening of brakes.
Implementation Method 1
a band brake (30, 35) which acts on the traction pulley (21), wherein the brake band (32, 37) is laid around the band disc (31, 36)
Data Source
AI summary
A method for introducing an elevator support into an elevator system includes a support brake device for controlling a drawing-in speed of the elevator support. The elevator support is wound on a support roller at a floor or in a machine room of a building. The elevator support is unwound from the roller and introduced into a shaft of the elevator system. The support brake device is arranged between the support roller and the shaft, and a drawing-in speed of the elevator support is adjusted by the support brake device. The support brake device contains a traction pulley for receiving the elevator support that is rotatably mounted in a support frame so that the elevator support can at least partly loop around the traction pulley. The traction pulley is braked by a pulley brake device, whereby the drawing-in speed can be controlled.