Elevator Hoisting Machine Positioning via Temporary Pulley Beam

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Solution Overview

Problem

Existing elevator construction methods face challenges in optimizing component positions during the construction phase and in the final elevator, particularly when using the jump-lift method where the hoisting machine position needs to change.

Innovation Solution

A method involving a temporary pulley beam assembly detachably mounted on the elevator car's cabin frame, allowing the hoisting machine to be positioned at different levels during construction and final installation, enabling optimal positioning without compromising the ease of conversion from a construction-time elevator to a final elevator.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the hoisting machine is mounted directly on a stationary structure (e.g., guide rail) during construction phase, then the construction-time elevator can be operated, but the hoisting machine position is strongly affected by the stationary structure position and cannot be optimized for the final elevator configuration

Engineering Contradiction:

Improveease of construction-time operationVSAvoidflexibility in final elevator configuration

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The hoisting machine system is divided into two separate components: a movable machine room that can be positioned flexibly during construction, and a stationary guide rail structure. This segmentation allows the machine room to be relocated to optimal positions for both construction and final operation, while the guide rail remains fixed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The machine room is designed to be movable rather than fixed, allowing it to be repositioned vertically along the guide rail. This dynamic capability enables optimization of the hoisting machine position for the final elevator configuration after construction is complete, while still allowing operation during the construction phase.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If a movable machine room is used during construction phase, then the hoisting machine can be repositioned, but the balance requirements of the machine room create restrictions on component positions

Engineering Contradiction:

Improveability to reposition hoisting machineVSAvoidbalance requirements complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

A counterweight system is introduced as an intermediary component to balance the movable machine room. The counterweight compensates for the weight of the machine room and its contents, eliminating balance restrictions on component positioning within the machine room while still allowing vertical movement along the guide rail.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Manufacturing precision

If the hoisting machine position is optimized for the final elevator configuration during construction, then the final configuration is optimal, but the construction-time elevator operation may be compromised

Engineering Contradiction:

Improveoptimization of final elevator configurationVSAvoidease of construction-time operation

Core Design Contradiction:

Manufacturing precisionVSEase of operation

Solution Approach 1:

The machine room is designed with movable mounting mechanisms that allow it to be repositioned along the guide rail. During construction, it can be positioned at lower levels for optimal construction-time operation, and after construction is complete, it can be relocated to the optimal position for the final elevator configuration.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The guide rail structure is installed and prepared in advance during construction, providing a ready-made pathway for the machine room to follow. This preliminary preparation enables flexible repositioning of the hoisting machine without requiring additional structural modifications later.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12330913B2Method of constructing elevator and construction-time elevator arrangement

Publication Date: 2025.06.17 KONE OYJ

AI summary

The invention relates to a method of constructing an elevator comprising providing an elevator car in a hoistway, said elevator car comprising a cabin frame, and a temporary pulley beam detachably mounted on the cabin frame; mounting a hoisting machine in a first position which first position is at a first vertical level in the hoistway; suspending (first suspending) the elevator car with a hoisting roping from the hoisting machine via said temporary pulley beam; moving the elevator car in the hoistway with the hoisting machine while it is in said first position and suspended by the roping via said temporary pulley beam; mounting a hoisting machine in a second position which second position is at a second higher vertical level inside a machine room located above the hoistway; removing the temporary pulley beam from the elevator car, comprising detaching the temporary pulley beam from the cabin frame; suspending the car with a hoisting roping from the hoisting machine mounted in said second position via said cabin frame without said temporary pulley beam; moving the elevator car in the hoistway with the hoisting machine while it is in said second position and the car is suspended via said cabin frame without said temporary pulley beam. The invention also relates to an elevator arrangement for implementing the method.