Adjustable Elevator Architrave Overlap for Variable Wall Gaps

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Elevator landing door systems often face variations in gap sizes and wall thicknesses, leading to unsightly and potentially unsafe misalignments and extensions, necessitating custom-made or on-site cut architraves that are time-consuming and wasteful.

Innovation Solution

An adjustable elevator landing architrave system with adjustable overlap lengths, allowing for on-site installation to accommodate varying distances between the landing door system and the outer wall, using overlapping pieces to obscure gaps and extensions, with hidden attachments for aesthetic and functional improvement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If custom-made or on-site cut architraves are used to accommodate varying wall thicknesses and gap sizes, then the aesthetic appearance and proper operation are improved, but the installation time and manufacturing complexity increase significantly

Engineering Contradiction:
Improveadaptability to varying wall thicknessesVSAvoidinstallation time
Core Design Contradiction:
Adaptability or versatilityVSLoss of time

Solution Approach 1:

The architrave system employs adjustable components that can be dynamically configured on-site to match varying wall thicknesses and gap sizes. The adjustable architrave includes movable elements that can be positioned at different depths, allowing the same standardized component to adapt to multiple installation scenarios without requiring custom fabrication for each case.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The architrave is divided into multiple modular segments or layers that can be independently adjusted and assembled. This segmentation allows the system to accommodate varying dimensions by combining different numbers and configurations of standard modules, eliminating the need for custom-made single-piece architraves while reducing installation time through pre-fabricated components.

Inventive Principle:
Principle #1Segmentation

2Adaptability or versatility

If custom-made architraves are manufactured for each landing to accommodate variations in doorframe dimensions and wall thicknesses, then the aesthetic appearance is improved, but the manufacturing complexity and waste increase

Engineering Contradiction:
Improveadaptability to varying gap sizesVSAvoidmaterial waste
Core Design Contradiction:
Adaptability or versatilityVSLoss of substance

Solution Approach 1:

The architrave system is designed as a universal multi-functional component that can be used across all landings regardless of variations in wall thickness, doorframe dimensions, or gap sizes. By incorporating adjustable mechanisms and modular segments, a single standardized architrave design serves multiple functions and adapts to different installation requirements, eliminating the need for custom-made architraves for each landing and significantly reducing material waste.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If doorframes are cut precisely into the wall to achieve proper alignment, then the aesthetic appearance is improved, but the installation precision requirements and time increase

Engineering Contradiction:
Improvealignment accuracyVSAvoiddoorframe cutting precision
Core Design Contradiction:
Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The architrave system incorporates preliminary adjustment mechanisms that allow installers to pre-position and pre-adjust the architrave components to achieve proper alignment before final installation. The adjustable elements enable compensation for minor variations in doorframe cutting precision, allowing accurate alignment to be achieved through adjustment rather than requiring extremely precise initial cutting of the doorframe into the wall.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentEP4406899B1Adjustable elevator landing architraves for elevator landing doorway assemblies
Publication Date: 2025.11.26 OTIS ELEVATOR CO
  • EP4406899B1 patent drawingFigure 1a~1b
  • EP4406899B1 patent drawingFigure 2a~2b
  • EP4406899B1 patent drawingFigure 3a~3b

AI summary

According to the present disclosure, there is provided an adjustable elevator landing architrave (300) for an elevator landing doorway assembly (400). The adjustable elevator landing architrave (300) comprises: a first piece (100) for arranging next to an elevator landing door system (410), the first piece (100) having a first length in an overlap direction, for at least partially obscuring the doorframe (420) from view; and a second piece (200) having a first width for at least partially obscuring from view a portion (406) of the elevator landing door system (410) extending beyond the doorframe (420); the second piece (200) further having a first length in the overlap direction, for at least partially overlapping with the first length of the first piece (100) to define an adjustable overlap length (301). The overall length (302) of the adjustable elevator landing architrave (300) can be adjusted dependent on the adjustable overlap length (301).