Modular Joinery Fastening for Gap and Plumb Adjustment
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Solution Overview
Problem
Existing fixing devices for joinery, such as window and door frames, require custom-made dimensions to match the gap between the joinery and the wall, lack adjustability for verticality, and complicate installation, especially in renovation scenarios where old frames need removal.
Innovation Solution
A modular fastening device comprising a fixing support with a bore and upstream and downstream bolts, where each bolt has a threaded shank and head with complementary threading, allowing for extension and adjustment to fit various thicknesses and ensuring modularity, along with a screw for wall penetration and a washer for secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixing bracket with a bore and screw is used to fix the window frame to the wall, then the frame can be fixed to the wall, but the device must be custom-made to match the exact gap between the window frame and the wall, complicating installation
Solution Approach 1:
The fixing device is divided into modular components: a fixing bracket and multiple extendable bolts that can be assembled in different configurations. This segmentation allows the same basic components to adapt to various gap distances without requiring custom-made devices for each installation.
Solution Approach 2:
The bolt assembly includes extendable mechanisms that allow adjustment of the effective length to match different gaps between the window frame and wall. This dynamic adjustment capability eliminates the need for custom-made fixed-length brackets for each specific gap measurement.
2Ease of operation
If a fixed-length fixing bracket is used, then the device structure is simple, but it cannot adjust to wall defects or excessive plaster thickness, causing the frame to tilt
Solution Approach 1:
The fixing device incorporates adjustable bolt mechanisms that can be extended or repositioned to compensate for wall irregularities such as defects or excessive plaster thickness. This dynamic adjustment ensures the window frame remains plumb and stable without requiring perfectly uniform wall surfaces.
Solution Approach 2:
The effective length and position of the fixing bolts can be changed to adapt to varying wall conditions. By adjusting these parameters, the device maintains proper frame alignment and plumb stability regardless of wall defects or variations in plaster thickness.
3Manufacturing precision
If multiple custom-made fixing devices are obtained for different gap distances, then each installation can be precisely fitted, but the task becomes complicated when multiple installations with varying distances are involved
Solution Approach 1:
A single universal fixing device design with adjustable and extendable components can accommodate multiple gap distances and installation scenarios. This multi-functionality allows the same basic device to be used across different installations, eliminating the need to obtain and manage multiple custom-made devices for varying distances.
Solution Approach 2:
The fixing device uses modular segmented components that can be assembled in different configurations to achieve precise fitting for various gap distances. This segmentation maintains manufacturing precision while improving installation efficiency, as workers can adapt the modular components rather than installing entirely different custom-made devices.
4Ease of manufacture
If a simple fixing bracket is used, then the device is easy to manufacture, but it offers no possibility of adjusting the plumb of the joinery
Solution Approach 1:
The fixing device incorporates adjustable bolt mechanisms that enable plumb adjustment of the joinery while maintaining relative manufacturing simplicity. The dynamic adjustment capability is achieved through straightforward mechanical means that do not require complex manufacturing processes.
Data Source
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AI summary
Fixing device (100), for the installation of joinery, comprising a fixing support (10), formed of a bore (11) mounted on a base (12), and an upstream bolt (20) provided with a shank (21) and a head (22), said bore being suitable for receiving said shank, said fixing device comprising at least one downstream bolt (20), identical to the upstream bolt, provided with a shank (21) and a head (22), the head of at least one downstream bolt comprising a bore (221) suitable for receiving a part of the shank of the upstream bolt.