Movable Machine Room Hoisting for Elevator Installation
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Solution Overview
Problem
The installation of elevator parts above the machine room in jump-lifts is slow and complicated, often requiring the use of a construction site crane, which may not be readily available.
Innovation Solution
A method involving the construction of a movable machine room in the bottom end of the hoistway, hoisting it to different positions using prefabricated sub-modules, and connecting it to stationary structures, allowing the elevator car to operate while the machine room is suspended, thus reducing dependence on cranes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a construction site crane is used to lift large parts such as the movable machine room and installation platform into the hoistway, then the installation can be performed, but the process becomes slow and complicated due to crane unavailability and dependency on external equipment
Solution Approach 1:
The patent introduces a hoisting machine as an intermediary device that is integrated into the elevator system itself. This hoisting machine can lift the movable machine room and installation platform without requiring external construction site cranes, thereby eliminating the dependency on unavailable external equipment and accelerating the installation process.
Solution Approach 2:
The elevator system performs its own installation through the integrated hoisting machine. The movable machine room and installation platform are lifted and positioned by the elevator's own mechanisms rather than requiring external crane services, making the system self-sufficient and eliminating delays caused by crane availability.
2Productivity
If the movable machine room is lifted as a complete unit into the hoistway using a construction site crane, then the installation can proceed, but the process becomes complicated and slow due to the need for crane availability
Solution Approach 1:
The hoisting machine serves as an intermediary that simplifies the lifting process. Instead of requiring complex crane operations, the integrated hoisting machine provides a straightforward, controlled lifting mechanism that is part of the elevator system, thereby reducing installation complexity while maintaining efficiency.
Solution Approach 2:
The patent divides the installation process into manageable segments using prefabricated sub-modules. The movable machine room is constructed from these pre-fabricated components, which can be easily assembled and lifted by the integrated hoisting machine, simplifying the overall installation process while maintaining productivity.
3Productivity
If prefabricated sub-modules are used to construct the movable machine room, then the installation becomes faster and more efficient, but the complexity of assembling and connecting multiple components increases
Solution Approach 1:
The movable machine room is divided into prefabricated sub-modules that are constructed separately and then assembled. This segmentation allows for parallel construction of multiple components, increasing productivity, while the modular nature simplifies the assembly process compared to constructing a complete machine room on-site.
Solution Approach 2:
The sub-modules are pre-fabricated and prepared in advance, with all necessary connections and alignments pre-configured. This preliminary action reduces the complexity of on-site assembly, as the components are designed to be easily connected to each other and to the hoistway structure, thereby maintaining high productivity without excessive assembly complexity.
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 method enables swift and efficient installation of elevator parts, minimizing the need for construction site cranes and facilitating safe and accurate construction, with the ability to disassemble and reuse components for other projects.
Implementation Method 1
a hoisting machine supported on a machine room which is vertically movable in the elevator hoistway. The car can hangs suspended from the movable machine room during its use for transporting passengers and/or goods below the movable machine room via a hoisting roping.
Implementation Method 2
connecting the elevator car and the counterweight with a suspension roping preferably hanging from the movable machine room and passing around at least one rope wheel of the movable machine room
Implementation Method 3
The car can hangs suspended from the movable machine room during its use for transporting passengers and/or goods below the movable machine room via a hoisting roping
Data Source
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AI summary
The invention relates to a method for constructing an elevator comprising constructing a movable machine room (1) in the bottom end of a hoistway (2) formed in a building (3) under construction; and thereafter hoisting the movable machine room (1); and constructing an elevator car (4) in the bottom end of the hoistway below the movable machine room; and providing a counterweight (5) in the bottom end of the hoistway below the movable machine room; connecting the elevator car (4) and the counterweight (5) with a suspension roping (6); and thereafter hoisting the movable machine room (1) to a first transport position (I); and thereafter mounting the movable machine room (1) to the first transport position (I) in the hoistway (2) vertically supported on stationary structures; and thereafter using the elevator car (4) for transporting passengers and/or goods below the movable machine room (1) while the machine room (1) is mounted in said first transport position (I) and the elevator car (4) and the counterweight (5) hang suspended from the machine room (1) by the hoisting roping (6); and thereafter hoisting the movable machine room (1) upwards to a second transport position (II); wherein the second transport position (II) is higher than said first transport position (I); and thereafter mounting the movable machine room (1) to the second transport position (II) in the hoistway (2) vertically supported on stationary structures; and thereafter using the elevator car (4) for transporting passengers and/or goods below the movable machine room (1) while the movable machine room (1) is mounted in said second position (II).