Fastener Driving Tool With Retracting Feed for Consistent Depth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing driving tools struggle with inconsistent fastener driving depth due to varying adhesive amounts in laminated veneer lumber and solid wood materials, leading to fastener lifting or excessive driving, and require manual intervention for idle-driving, which is labor-intensive.
Innovation Solution
A driving tool with an injection passage, driving-out portion, and retracting portion that allows for retracting fasteners from the injection passage for further driving without removing all fasteners, and a switcher to enable or disable feeding to the injection passage for idle-driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driving force and driving amount are set to be high to eliminate fastener lifting in hard portions, then the lifting problem is solved, but the fastener may be driven too deep at other construction positions causing construction problems
Solution Approach 1:
The patent applies local quality by providing different functional zones within the injection passage: a first injection passage for normal fastener injection and a second injection passage specifically for retracting and re-injecting fasteners that have been driven into hard portions. This allows the system to apply different driving conditions locally - high force for lifting fasteners from hard portions and controlled force for normal positioning, thereby solving the contradiction between eliminating lifting and preventing over-driving.
2Manufacturing precision
If a manual hammer is used to further drive the lifted fastener, then the fastener can be driven to predetermined depth, but labor intensity increases
Solution Approach 1:
The patent implements self-service by enabling the driving tool to automatically perform the idle-driving function. The retracting portion automatically retracts the fastener from the first injection passage, and the second injection passage automatically re-injects it for further driving, without requiring manual intervention with a hammer. This eliminates the need for manual hammering while achieving the desired fastener depth, thereby solving the contradiction between driving precision and labor intensity.
3Productivity
If the driving tool is used to further drive the fastener, then continuous operation is possible, but it is necessary to take out fasteners from the magazine and reload them
Solution Approach 1:
The patent applies segmentation by dividing the injection passage into two independent channels: the first injection passage for normal fastener injection from the magazine, and the second injection passage for re-injecting fasteners that need further driving. This segmentation allows simultaneous operation - while one fastener is being re-injected and further driven, the next fastener can be loaded into the first injection passage, eliminating the need to stop and reload fasteners and maintaining continuous productivity.
4Reliability
If the fastener is driven into hard portions such as knot portions or adhesive-rich portions, then the fastener may be lifted, but increasing driving force causes excessive energy consumption at other positions
Solution Approach 1:
The patent implements dynamics by creating a dynamic fastener driving system with two operational modes: normal driving mode using the first injection passage for soft portions, and idle-driving mode using the second injection passage for hard portions. The system dynamically switches between modes based on the fastener's driving status, allowing high energy input only when necessary for lifting fasteners from hard portions, rather than continuously applying high force at all positions, thereby reducing overall energy consumption while ensuring reliable embedding.
Data Source
AI summary
There is provided a driving tool including: a magazine configured to accommodate a connected fastener obtained by connecting a plurality of fasteners; an injection passage provided with an injection port for injecting at least one fastener of the plurality of fasteners; and a driving-out portion configured to drive out the fastener supplied to the injection passage from the injection port. The driving-out portion is configured to idle-drive without driving out the fastener from the injection port in a state where the connected fastener is accommodated in the magazine.