Single Lifting Platform for Elevator Drive Platforms
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Solution Overview
Problem
Current methods for constructing elevator systems in buildings under construction do not provide cost savings when multiple elevators need to have their usable lifting heights adapted to an increasing building height, as they require multiple lifting platforms and complex lifting operations.
Innovation Solution
A method where a single lifting platform is used to alternately raise and lock the drive platforms of multiple elevators, with a drive platform hoist and traction means, allowing incremental adjustments to the elevators' lifting heights, reducing the need for multiple lifting platforms and simplifying the lifting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple lifting platforms are used to raise drive platforms of multiple elevators simultaneously, then the construction process can proceed in parallel for each elevator, but the cost and device complexity increase significantly
Solution Approach 1:
A single lifting platform is designed to serve multiple elevators sequentially. The lifting platform can be positioned above different drive platforms and raise them in turn, making one device perform the function of multiple lifting platforms. This reduces the number of lifting platforms needed while maintaining the ability to construct multiple elevators.
Solution Approach 2:
The lifting operations are performed in alternating periodic cycles for different elevators. The lifting platform raises the drive platform of one elevator, then moves to and raises the drive platform of another elevator, creating a periodic pattern of lifting operations that achieves parallel construction progress without requiring simultaneous lifting platforms.
2Device complexity
If a single lifting platform is used to alternately raise multiple drive platforms, then cost and device complexity are reduced, but the construction time for each individual elevator increases
Solution Approach 1:
The lifting platform performs preliminary raising of drive platforms in advance of the final elevator assembly. By raising drive platforms incrementally and positioning them at appropriate heights during the construction phase, the actual elevator assembly and commissioning time is reduced, as the heavy lifting work has already been completed.
Solution Approach 2:
The construction process is made dynamic and adaptive rather than rigid. The lifting platform can adjust its schedule and sequence of operations based on construction needs, allowing flexibility in how time is allocated to different elevators. This dynamic approach optimizes the balance between reduced device complexity and acceptable construction time.
3Adaptability or versatility
If drive platforms are raised incrementally to adapt to increasing building height, then the elevators can be used during construction, but the lifting operations become more complex and time-consuming
Solution Approach 1:
The lifting operation is segmented into multiple incremental steps rather than one large lift. The lifting platform raises drive platforms in smaller increments as the building height increases, making each lifting operation more manageable and less complex. This segmentation allows the system to adapt to the growing building height without requiring increasingly complex single-step lifting mechanisms.
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 approach results in significant cost savings and simplifies the process of adapting multiple elevators' lifting heights, reducing the complexity and expense of elevator system construction by using a single lifting platform and shared lifting equipment.
Implementation Method 1
forms a supporting construction, by means of which the lifting force required to raise the drive platform is transferred to supporting elements of the elevator shaft
Implementation Method 2
a drive platform hoist with a drive platform traction means is installed on the lifting platform for raising the drive platforms
Implementation Method 3
which elevator drive machine supports and drives an elevator car and a counterweight by means of a traction sheave and at least one flexible suspension means
Data Source
AI summary
A method for constructing at least two elevators in a building under construction adapts the usable lifting heights of the elevators to an increasing height of the building, wherein each of the elevators is arranged in an elevator shaft of the building associated with the elevator and includes a drive platform having an elevator drive machine that supports and drives an elevator car and a counterweight by a traction sheave and at least one flexible suspension device. In order to adapt the usable lifting heights, lifting operations are performed in which in alternation one of the drive platforms is raised to a higher level in the associated elevator shaft and is locked there. A single lifting platform is temporarily fastened above the particular drive platform to be lifted to apply a lifting force required to raise the drive platform, which force is transferred to supporting elements of the elevator shaft.