Elevator Rail Anchoring with Variable Load Spacing

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Conventional rail systems for elevator installations utilize anchoring devices at fixed intervals, leading to excessive material usage due to uniform spacing that does not account for varying loads along the rail, resulting in inefficient material utilization.

Innovation Solution

A rail system with anchoring devices positioned at varying heights and gaps that adjust based on local load distribution, allowing for fewer anchoring devices by bridging gaps in a monotonically decreasing manner, reducing material requirements by up to 25%.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If anchoring devices are placed at fixed intervals throughout the entire rail system, then the rail system can support maximum rail load, but material utilization becomes inefficient due to excessive anchoring devices at less stressed points

Engineering Contradiction:
Improveload bearing capacityVSAvoidmaterial utilization
Core Design Contradiction:
ReliabilityVSLoss of substance

Solution Approach 1:

The patent applies local quality by varying the spacing of anchoring devices according to the local load conditions at different positions along the rail. The gap length between adjacent anchoring devices is adjusted to match the actual load requirements: smaller gaps where loads are higher and larger gaps where loads are lower. This ensures that each section of the rail receives appropriate support without over-engineering any particular location, thereby optimizing material utilization while maintaining the required load bearing capacity.

Inventive Principle:
Principle #3Local quality

2Ease of manufacture

If uniform spacing of anchoring devices is used, then installation is simplified, but material requirements increase by up to 25 percent

Engineering Contradiction:
Improveinstallation simplicityVSAvoidmaterial requirements
Core Design Contradiction:
Ease of manufactureVSQuantity of substance

Solution Approach 1:

The patent implements parameter changes by modifying the spacing parameter of anchoring devices based on the local load conditions. Instead of using a constant gap length throughout the rail system, the gap length is varied as a parameter that changes with position along the rail. This allows the system to use fewer anchoring devices (reducing material requirements by up to 25%) while still meeting the structural requirements at each location.

Inventive Principle:
Principle #35Parameter changes

3Stability of the object's composition

If anchoring devices are placed closer together, then rail stability is improved, but material usage increases unnecessarily

Engineering Contradiction:
Improverail stabilityVSAvoidmaterial usage
Core Design Contradiction:
Stability of the object's compositionVSLoss of substance

Solution Approach 1:

The patent applies local quality by adjusting the gap length between anchoring devices to match the actual stability requirements at each location along the rail. Rather than uniformly placing anchoring devices at small intervals throughout the entire rail system, the invention varies the spacing so that closer spacing is used only where the local load conditions require enhanced stability, while larger spacing is used where the rail is already adequately supported. This optimizes the balance between rail stability and material usage.

Inventive Principle:
Principle #3Local quality

Data Source

PatentEP4429992B1Rail system for a lift system and method for the production of same
Publication Date: 2025.05.21 INVENTIO AG
  • EP4429992B1 patent drawingFigure 1

AI summary

The present invention relates to a rail system (100) for a lift installation, wherein the rail system (100) has at least one vertically oriented rail (102) for guiding vertically movable components of the lift installation, wherein the rail (102) is anchored to at least one substantially vertically oriented wall (106) at different height positions using anchoring devices (104) and bridges interspaces (110) between adjacent anchoring devices (104), wherein the interspaces (110) vary at least within a portion (108) of the rail (102) depending on a local load (112) of the rail (102), and the lengths of the interspaces (110) within the said portion (108) decrease monotonically depending on the rail's (102) own weight arranged locally above.