Telescopic Roof Truss Fastener Tool for 22.5° Angle Installation
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Solution Overview
Problem
Existing methods for securing wood structural members, such as roof trusses and rafters, with fasteners are inefficient and unsafe due to the difficulty in achieving a precise 22.5° angle for threaded fasteners, which is crucial for meeting building codes and ensuring structural integrity.
Innovation Solution
A telescopic installation tool with a guide assembly that allows for precise alignment and driving of threaded fasteners at a 22.5° angle, eliminating the need for ladders and providing a stable platform for installers, ensuring consistent and secure connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If threaded fasteners are installed manually with protractors and levels to achieve the optimum 22.5° angle, then connection strength is improved, but installation time and complexity increase significantly
Solution Approach 1:
The patent introduces a guide assembly as an intermediary device between the installer and the fastener installation process. This guide assembly pre-establishes the correct 22.5° angle path, allowing fasteners to be installed at the optimum angle without requiring installers to manually measure and calculate angles using protractors and levels, thereby significantly reducing installation time while maintaining connection strength
Solution Approach 2:
The guide assembly is pre-configured with the correct 22.5° angle geometry before installation. This preliminary preparation of the installation path eliminates the need for angle measurement and adjustment during the actual fastener installation process, reducing installation time and complexity while ensuring consistent optimum angle achievement
2Ease of operation
If workers stand on ladders to install fasteners at high locations, then access to roof trusses is achieved, but safety and stability deteriorate
Solution Approach 1:
The patent extends the installation tool with a telescopic tube assembly that increases its reach in the vertical dimension. This allows installers to work from ground level or stable platforms rather than climbing ladders to access high roof truss locations, improving safety and stability while maintaining ease of operation at elevated positions
3Strength
If multiple metal brackets and nails are used to meet code requirements, then connection integrity is improved, but device complexity and installation difficulty increase
Solution Approach 1:
The patent extracts and eliminates the need for separate metal brackets from the connection system. By using long threaded fasteners (6 inches or more) that directly connect the top plate to the roof truss or rafter, the system removes the intermediate bracket component, reducing device complexity and installation difficulty while maintaining or improving connection integrity through the threaded engagement
Data Source
AI summary
An installation tool and fastener is particularly adapted for fastening a top plate to a roof support member and other structural connections. The installation tool comprises a telescopic tool assembly which transfers torque from a power driver tool to a fastener drive coupler. The installation tool has a receiver guide which is configured to concentrically guide a fastener into driver engagement with a fastener coupler. The coupler may have a driver tip with radial projections, a Philips driver tip or a square driver tip. In one embodiment, the installation tool fastener has a head with a maximum head diameter equal to the major thread diameter and a recess for coupling with the drive coupler.