Threaded-Socket Nail Plate with Weakening Section for Easy Removal
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Solution Overview
Problem
Existing nail plates used to hold threaded sockets in concrete constructions are difficult to remove after the concrete has set, often requiring manual labor and potentially damaging the nail plate or formwork.
Innovation Solution
A nail plate design featuring a central tube with a weakening section that allows a screw or nail to detach from the plate when the formwork is removed, facilitating easy removal of the nail plate and socket with a rotating movement using a tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a nail plate is attached to formwork with nails or glue to hold a threaded socket, then the socket is securely positioned during concrete pouring, but the nail plate adheres too strongly to the set concrete and becomes difficult to remove
Solution Approach 1:
The nail plate is divided into two functional segments: a permanent plate body that remains attached to the formwork, and a removable stud section that can be detached after concrete setting. This segmentation allows the plate to be securely held during pouring while enabling easy removal of the stud portion afterward.
Solution Approach 2:
The stud section is extracted as a separate, removable component from the nail plate. This extracted portion contains the threaded socket and can be easily removed from the set concrete, leaving the main plate body attached to the formwork for reuse.
2Reliability
If multiple nails are used to attach the nail plate to prevent rotation, then the nail plate is securely fixed, but additional manual work is required to remove the nails before unscrewing the plate
Solution Approach 1:
The attachment mechanism is segmented into permanent formwork attachment (plate body with nails) and temporary concrete attachment (removable stud). This allows the plate to be securely fixed during pouring while simplifying removal, as only the stud section needs to be unscrewed, not the entire plate with multiple nails.
Solution Approach 2:
The stud section with the threaded socket is extracted as a removable component that can be unscrewed from the concrete without needing to remove the nails from the formwork. This extraction eliminates the need for manual nail removal before plate unscrewing.
3Ease of manufacture
If the nail plate is made thin to create a shallow countersink, then less material is used, but the bearing surface is insufficient for proper glue application
Solution Approach 1:
The nail plate is segmented into a thin main plate body (for material efficiency) and a separate stud section with adequate bearing surface (for proper glue application). This segmentation allows the plate body to be thin while the stud section provides sufficient surface area for secure attachment during concrete pouring.
Data Source
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AI summary
A nail plate (1) adapted to hold a threaded socket (30) when pouring concrete, where the nail plate (1) comprises a hollow body (2), where the nail plate (1) comprises a circular disc section (3) and a stud section (4), where the disc section (3) is provided with an upper surface (5), a side surface (6) and a bearing surface (16), where the stud section (4) is provided with an outer thread (7) and an upper stud surface (8) having an edge portion (9) and a central section (10), where the nail plate (1) is provided with a central tube (11) extending downwards from the central section (10) and where the central section (10) comprises a weakening section (12) that attaches the central tube (11) to the edge portion (9).