Construction Nailing Screw Threading for Fast Driving and Removal
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Solution Overview
Problem
Construction nails are difficult to remove or adjust once installed, while screws are more time-consuming to use, and there is a need for a fastener that can be installed like a nail but holds like a screw and can be easily removed by rotation.
Innovation Solution
A construction nailing screw with a shank featuring external threading for minimal friction during installation and mild resistance during removal, along with flats or flutes and a head designed for both manual and automatic installation tools, allowing for rotation during insertion and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a construction nail with a smooth shank is used, then it can be easily installed with a hammer, but it cannot be easily removed or adjusted once installed
Solution Approach 1:
The shank surface is changed from smooth to threaded, modifying the physical parameters of the fastener to enable both easy installation with a hammer and easy removal through rotation. The threading geometry allows the fastener to be driven like a nail while providing screw-like removal characteristics.
2Ease of repair
If a screw with threading is used, then it can be easily removed or adjusted, but it is more time consuming to use
Solution Approach 1:
The fastener combines characteristics of both nails and screws into a single universal component. It can be installed using a hammer like a nail, yet can be removed and adjusted like a screw, eliminating the need to choose between the two types based on removal requirements.
Solution Approach 2:
The threading on the shank provides dynamic characteristics where the fastener behaves differently during installation versus removal. During hammer installation, the threading minimizes friction for quick driving, while during removal, the threading engages to provide controlled extraction through rotation.
3Productivity
If a construction nail is used, then installation is faster, but it does not hold as well as a screw
Solution Approach 1:
The shank surface is changed from smooth to threaded, modifying the physical parameters of the fastener to enable both easy installation with a hammer and easy removal through rotation. The threading geometry allows the fastener to be driven like a nail while providing screw-like removal characteristics.
Data Source
AI summary
A construction nailing screw is configured to be used in like manner as traditional nails but rotate during driving through threading, providing retention of the construction nailing screw in the construction material(s), and the ability to be removed from the construction material(s) by reverse rotation. The construction nailing screw is characterized by a shank with a head on one longitudinal end, and a tip on another longitudinal end, with external threading that provides minimal friction during installation and mild resistance during removal, and two cutouts extending along the exterior of the shank and through the external threading. The head allows both a manual installation tool and an automatic installation tool to strike the head and drive (install) the nailing screw. The external threading has an upper side with a high pitch relative to the longitudinal axis of the shank, and a lower side with a low pitch relative to the longitudinal axis of the shank.