U-Profile Frame with Undercut Grooves for Fire Door Assembly
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Solution Overview
Problem
Existing frame and sash frame constructions for windows and doors, particularly those designed for smoke and fire protection, are complex to produce and require advanced fastening systems that are difficult to implement effectively.
Innovation Solution
A frame and sash frame design featuring a U-shaped cross-section with specific fastening and receiving grooves, including undercut grooves, that allow for easy assembly and integration of cover profiles for enhanced fire protection, using materials like intumescent materials for increased effectiveness in fire scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fastening systems are used for smoke and fire protection doors, then fire protection requirements are met, but production and assembly become complex
Solution Approach 1:
The frame spar is divided into a basic profile and a separate cover element. The basic profile contains integrated fastening grooves with undercut receiving grooves that accept fastening means on the cover element, enabling modular assembly while maintaining fire protection integrity
Solution Approach 2:
The fastening grooves and receiving grooves are merged into the basic profile structure itself, eliminating the need for separate fastening components. The cover element integrates both the covering function and the fastening interface, simplifying the overall assembly
2Reliability
If complex fastening grooves are designed to meet fire protection standards, then fire resistance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The undercut receiving grooves are pre-formed in the basic profile during manufacturing. The fastening means are pre-formed on the cover element with corresponding protrusions. This preliminary preparation allows for simple snap-fit assembly without requiring high-precision field adjustments
Solution Approach 2:
The undercut geometry of the receiving grooves creates a mechanical interlock that tolerates certain dimensional variations. The snap-fit mechanism transforms the assembly process from precision-critical to tolerance-friendly, maintaining fire protection while reducing manufacturing precision demands
3Ease of operation
If cover profiles are designed for easy assembly without tools, then ease of operation is improved, but static stabilization function is reduced
Solution Approach 1:
The cover element is designed to be self-installing via snap-fit into the fastening grooves of the basic profile. The fastening means on the cover element engage with the receiving grooves to create a self-securing connection that requires no tools for assembly
Solution Approach 2:
The basic profile and cover element can be made from different materials optimized for their specific functions. The basic profile provides structural strength and fire protection, while the cover element provides ease of assembly and aesthetic coverage, with the intumescent layer adding fire resistance without compromising assembly simplicity
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
The design simplifies the production and assembly of smoke and fire protection doors and windows by providing a robust, easy-to-assemble frame system that effectively covers gaps and enhances fire protection without significant static stabilization, using cover profiles that can be easily clipped into place and made from intumescent materials for improved fire resistance.
Implementation Method 1
using materials like intumescent materials for increased effectiveness in fire scenarios
Data Source
Figure 1
Figure 2a
Figure 2b~2c
AI summary
The invention relates to a main-frame bar and/or to a wing-frame bar for a main frame and/or a wing frame of a window, of a door, or of a façade element, having at least the following features: a main profiled element (300, 400) having a substantially U-shaped cross-section in single- or multi-piece design, which has, as viewed in a cross-section, a short leg (12), a long leg (13), and a transverse leg (14) formed therebetween, wherein a free intermediate space is formed between the ends of the short leg (12) and of the long leg (13) facing away from the transverse leg (14), a cover element and/or a fitting part extending over the intermediate space at least in some sections, wherein the short leg (12) and the long leg (13) of the main profiled element (300, 400) have multi-function contours (20, 21) on the inner sides thereof facing each other, which multi-function contours completely or partially bound at least the following groove: in each case, a fastening groove (20b, 21b) open in the same direction on the side facing away from the transverse leg (14) for fastening a corresponding fastening means of the fitting part or of the cover element.