Integrated Door Frame Hollow Profile for Flush Plastering
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Solution Overview
Problem
Conventional wall frames require an additional sub-frame for precise plastering, leading to increased complexity and assembly time, especially for flush frames, necessitating a solution that eliminates the need for a separate blind frame.
Innovation Solution
A dimensionally stable blind frame designed as a hollow profile or shaped tube that serves as both the frame and sub-frame, allowing for cost-effective production and reduced assembly time, with features like internal stiffening ribs, adjustable rebates, and flexible tabs for versatile installation and secure fixing, enabling a frameless appearance and wider passageways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional wall frame is used with an additional sub-frame for precise plastering, then the frame provides structural stability and precise plastering surface, but the assembly complexity and assembly time increase
Solution Approach 1:
The patent combines the structural frame and the plastering guide frame (sub-frame) into a single integrated profile structure. The profile includes both the load-bearing function and the plastering guide function in one element, eliminating the need for separate sub-frame assembly while maintaining precise plastering surfaces.
Solution Approach 2:
The single profile structure serves multiple functions simultaneously: it provides structural support, guides the plastering process, and creates the final flush surface. This multi-functional design replaces the conventional two-component system (frame + sub-frame) with one universal element.
2Manufacturing precision
If a conventional wall frame with additional sub-frame is used, then the frame achieves precise plastering surface, but the production cost and assembly cost increase
Solution Approach 1:
By merging the frame and sub-frame into one integrated profile, the patent reduces the number of components that need to be manufactured, stored, and assembled. This simplification reduces production costs while maintaining the precise plastering surface through the integrated design.
3Shape
If a flush frame is used to achieve a frameless appearance, then the aesthetic effect is improved, but the frame stability and structural integrity may be compromised
Solution Approach 1:
The profile structure has different local properties: the outer dimensions are designed to be flush with the wall surface for aesthetic purposes, while the internal structure includes reinforcing elements and stiffening ribs that provide the necessary structural strength and stability. This local differentiation allows both aesthetic and structural requirements to be met simultaneously.
4Length of moving object
If the frame width is reduced to achieve wider passageways, then the clear width of opening increases, but the frame stability and plastering precision may be affected
Solution Approach 1:
The profile maintains a compact external dimension for wide passageways while incorporating internal stiffening structures and plastering guide surfaces that ensure precise plastering. The local quality of the internal structure compensates for the reduced external width, maintaining both aesthetic flush appearance and functional precision.
Data Source
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AI summary
The invention relates to a frame (1), in particular a masonry frame, for receiving one or more door leaves (4) in a building opening, wherein the frame (1) is designed as a, in particular closed, substantially rectangular hollow profile (2), can be fixed directly to the building (7) via at least one of its outer surfaces facing the building (7) and has at least one further outer surface which, in the assembled state, is flush with the building (7) and/or the door leaf (4), wherein the hollow profile (2) has a projection (3) facing the door leaf (4) forming a rebate and at least one internal stiffening rib (9), and wherein the hollow profile (2) has at least one recess (19, 20) for receiving and fixing a door hinge (5), wherein the door hinge (5) engages in the hollow profile (2), can be fixed in it, and the internal stiffening rib (9) forms a stop for the door hinge.