Dual-Thread Door Leaf Alignment Fitting for Warping Control
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Solution Overview
Problem
Existing alignment fittings for door leaves are complex and require fixed lengths, making them difficult to install and adapt to varying door thicknesses and heights, and do not effectively address door warping issues.
Innovation Solution
An alignment fitting with two different thread pitches for screw channels and a rod, allowing for easy installation and adjustment to varying door thicknesses and heights, featuring a rod with varying thickness ends and a screw-in sleeve for adjustable alignment, and a method for assembly that includes cutting internal threads and screwing components together.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If existing alignment fittings are used, then door alignment is achieved, but the device complexity increases and fixed lengths are required
Solution Approach 1:
The alignment fitting is divided into separate modular components: a hollow profile with screw channels, a rod with different thread pitches, and a screw-in sleeve. This segmentation allows each component to be manufactured independently with standard dimensions, eliminating the need for fixed-length custom fittings while reducing overall device complexity through standardized parts.
Solution Approach 2:
The hollow profile serves multiple functions: it provides structural support, contains the rod, and offers screw channels for mounting. The rod with different thread pitches at each end provides both positioning and adjustment functions. This multi-functionality reduces the number of separate components needed, simplifying the overall device while maintaining versatility for different door configurations.
2Adaptability or versatility
If existing alignment fittings are used, then door alignment is achieved, but adaptability to varying door thicknesses and heights is limited
Solution Approach 1:
The rod can be adjusted in length and position within the hollow profile, and the screw-in sleeve allows for length adjustment of the rod assembly. This dynamic adjustability enables the same fitting design to accommodate varying door thicknesses and heights without requiring multiple fixed-length variants, maintaining manufacturing simplicity while increasing adaptability.
Solution Approach 2:
The fitting utilizes parameters such as thread pitch differences, rod diameter variations, and adjustable screw positions to adapt to different door configurations. By changing these parameters rather than the overall structure, the same basic design can serve multiple door types and sizes, simplifying manufacturing while enhancing versatility.
3Productivity
If existing alignment fittings are used, then door alignment is achieved, but installation time increases
Solution Approach 1:
The hollow profile is pre-formed with integrated screw channels, and the rod is pre-threaded with different pitch threads. These preliminary preparations allow for quick assembly without requiring complex field modifications or custom fabrication, significantly reducing installation time while maintaining ease of manufacture through standardized pre-processing.
4Adaptability or versatility
If existing alignment fittings are used, then door alignment is achieved, but cost increases
Solution Approach 1:
The alignment fitting uses standardized, readily available components with standard thread pitches and dimensions that can be manufactured cost-effectively. The modular design allows for simple replacement and retrofitting without requiring expensive custom-made parts, reducing both manufacturing costs and retrofit expenses while maintaining adaptability.
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 fitting provides a simple, cost-effective solution for aligning doors of varying thicknesses and heights, effectively counteracting warping by allowing for compressive or tensile stress adjustment, suitable for both professional and industrial use, and can be retrofitted to existing doors.
Implementation Method 1
the rod can be rotated by means of the rotary handle in order to generate either a compressive or a tensile stress in the rod and thus in the hollow profile due to the different thread pitches
Implementation Method 2
produce a transverse deformation of the door leaf perpendicular to the front and back of the door
Data Source
Figure 1~2
Figure 3a~4c
Figure 5a~5c
AI summary
The alignment fitting (1) according to the invention, for aligning a door leaf (2), comprises: a hollow profile (3) to be secured to a door leaf (2) and having an inner channel (5) with two channel ends (5a, 5b) that are open at the ends and each have a screw channel (6a, 6b) with the same internal thread (7); a rod (8) with two rod ends (8a, 8b) with two different thicknesses, wherein the thicker rod end (8a) has a first outer thread (9) corresponding with the internal thread (7) of the screw channels (6a, 6b), and the thinner rod end (8b) has a second outer thread (10) that is different from the first outer thread (9), and wherein the thicker rod end (8a) has an end-side rotary handle (11); and a screw-in sleeve (12) with an outer thread (13) corresponding with the internal thread (7) of the screw channels (6a, 6b) and with an internal thread (14) corresponding with the second outer thread (10) of the rod (8).