Telescopic Fastener Tool with 22.5 Degree Guide Assembly
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Solution Overview
Problem
Existing methods for securing wood structural members, such as using metal brackets and nails, are inefficient and dangerous due to the need for precise angle installation of threaded fasteners to meet building codes, particularly in high wind and seismic areas, and lack a reliable method for inspectors to verify correct installation.
Innovation Solution
A telescopic fastener installation tool with a guide assembly that ensures threaded fasteners are driven at a consistent 22.5° angle, allowing for precise and efficient connection of top plates to roof support members without ladders, and includes features for stabilizing the tool and verifying proper angle and installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If threaded fasteners are used to replace metal brackets and nails, then connection integrity is improved, but manufacturing precision is worsened due to the difficulty of maintaining the required 22.5° installation angle
Solution Approach 1:
The guide assembly is pre-configured with the exact 22.5° angle required by building codes. The installer simply attaches the guide assembly to the rafter and inserts the fastener through the pre-formed channel, which automatically ensures the correct angle without requiring the installer to manually measure or calculate the angle during installation
Solution Approach 2:
The guide assembly acts as an intermediary device between the installer and the rafter. It provides a pre-formed channel at the correct 22.5° angle that guides the fastener, thereby mediating the installation process and ensuring code compliance without requiring the installer to directly achieve the precise angle through skill or measurement tools
2Ease of operation
If conventional fastening methods with multiple nails are used, then ease of operation is improved, but productivity is worsened due to the time-consuming nature of installing multiple fasteners
Solution Approach 1:
The guide assembly combines multiple functions into a single device: it provides angular guidance, positions the fastener correctly, and ensures proper orientation relative to the rafter. This merging of functions into one integrated tool allows the installer to achieve code-compliant installation in a single operation rather than multiple separate steps
Solution Approach 2:
The guide assembly is designed to be self-aligning and self-positioning. Once attached to the rafter, the pre-formed channel automatically orients itself at the correct angle and position, and the fastener self-guides through the channel, eliminating the need for continuous manual adjustment or measurement during the installation process
3Measurement precision
If inspectors manually verify fastener installation angles, then measurement precision is improved, but loss of time is worsened due to the lengthy verification process
Solution Approach 1:
The guide assembly provides immediate visual feedback during installation. The pre-formed channel and its orientation relative to the rafter make it obvious when the fastener is correctly positioned at 22.5°. Inspectors can quickly verify compliance by visually checking whether the fastener passes through the guide assembly's channel, eliminating the need for time-consuming protractor measurements
Solution Approach 2:
The guide assembly creates a physical copy or representation of the required 22.5° angle through its pre-formed channel. Instead of inspectors needing to measure and calculate angles, they can simply verify whether the fastener follows the channel's path, which is a visual copy of the correct installation geometry
Data Source
AI summary
An installation tool for fastening a top plate to a roof support member and other structural connections is adapted to drive screws at a pre-established angle. The tool preferably includes a rotary driver assembly and a telescopic tube assembly. A guide assembly is mounted adjacent the outer end of the telescopic tube assembly. Locating structures function to properly precisely set the drive angle of the screw. A stabilizer prevents the screw from moving during the installation. The guide assembly is also configured to provide a marking for inspection purposes.