Elevator Car Robot Maintenance for Safer Shaft Servicing

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Solution Overview

Problem

Maintenance work inside elevator shafts is dangerous for technicians due to moving parts, is manpower intensive, and lacks efficient automation.

Innovation Solution

A method involving a robot positioned on the elevator car that collaborates with a technician inside the car to perform maintenance tasks, including positioning the car for access, executing maintenance operations, and documenting the process, while ensuring safety and efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a technician enters the elevator shaft to perform maintenance, then maintenance work can be performed on elevator components, but the technician is exposed to dangerous moving parts

Engineering Contradiction:

Improvemaintenance accessibilityVSAvoidsafety risk to technician

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

A robot is introduced as an intermediary device to perform maintenance tasks inside the elevator shaft. The robot can be positioned on the car roof and access elevator components that would otherwise require a technician to enter the shaft. This mediator performs the dangerous work while the technician remains safely outside, controlling or monitoring the robot's actions.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If manual maintenance is performed by technicians, then maintenance tasks can be completed, but the process is manpower intensive

Engineering Contradiction:

Improvemaintenance efficiencyVSAvoidmanpower required

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The robot is designed to perform maintenance tasks autonomously or with minimal human intervention. It can self-navigate to maintenance positions, self-adjust its tools, and self-complete inspection or repair tasks on elevator components. This self-service capability significantly reduces the manpower required compared to manual maintenance while maintaining or improving productivity.

Inventive Principle:

Principle #25Self-service

3Productivity

If routine maintenance is automated with a robot, then manpower requirements are reduced, but the system complexity increases

Engineering Contradiction:

Improvemaintenance automationVSAvoidrobotic system complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The robot is designed with multi-functionality to handle various maintenance tasks using a single platform. It can perform inspections, cleaning, lubrication, and minor repairs on different elevator components. This universal design approach, while complex, consolidates multiple specialized devices into one system, making the overall automation more manageable and cost-effective.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP4573037B1Method of doing maintenance on an elevator

Publication Date: 2026.04.15 INVENTIO AG

Figure 1

AI summary

A method of doing maintenance on an elevator (100) is proposed. The method comprises: (i) putting a robot (104) on a car (110) of the elevator (100); (ii) positioning the car (110) with the robot (104) at a landing (106) to admit at least one operator (102) into the car (110); (iii) positioning the car (110) with the robot (104) and the operator (102) at a maintenance position (122); (iv) executing the maintenance with the robot (104) in response to operator input (124); (v) positioning the car (110) with the robot (104) and the operator (102) at a landing (106) to release the operator (102) from the car. (vi) taking the robot (104) from the car (110).