Driving Machine Nose Portion Guide Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional driving machines often result in faulty nailing due to torque-induced tilting of fasteners, especially with small head diameter and short shank length nails, and existing guide members face durability issues and loss during operation.
Innovation Solution
A driving machine with a nose portion featuring a first guide portion and a movable second guide portion that changes the cross-sectional area of the injection hole, preventing driver blade interference and enhancing durability through a spring-urged rotatable mechanism and adjustable positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a guide member is attached to the nose portion to hold the fastener, then the fastener can be suitably held for driving, but the guide member is removed during operation and can be lost
Solution Approach 1:
The guide member is merged with the nose portion through integral formation or secure attachment, creating a unified structure where the guide member cannot be separated or lost during operation. This combines the nose portion and guide member into a single functional unit that maintains fastener holding capability while eliminating the risk of guide member loss.
2Manufacturing precision
If a rotatable guide member with inclined surface is disposed at the nose portion, then the fastener can be guided to the center of the injection hole, but the guide member is subjected to impact force from the driver blade and durability is reduced
Solution Approach 1:
The guide member is extracted from the direct impact path of the driver blade by positioning it at the nose portion rather than on the sliding path. This separates the guiding function from the impact zone, allowing the guide member to perform its alignment function without being subjected to the harmful impact forces that would reduce its durability.
Solution Approach 2:
The guide member with inclined surface pre-aligns the fastener to the center of the injection hole before the driver blade strikes, preventing the driver blade from contacting the guide member during operation. This preliminary alignment action eliminates the subsequent harmful interaction between the driver blade and guide member.
3Manufacturing precision
If the injection hole cross section is reduced to hold small fasteners, then nailing accuracy improves, but the driver blade may interfere with the guide portion
Solution Approach 1:
The guide portion is segmented into a first guide portion fixed to the nose portion and a second guide portion that is movable relative to the first. This segmentation allows the second guide portion to move away from the driver blade path when needed, preventing interference while maintaining the ability to provide precise guidance when the fastener requires it.
Solution Approach 2:
The second guide portion is made movable rather than fixed, allowing it to dynamically adjust its position. It can move away from the driver blade to prevent interference and can be positioned to provide guidance when needed, creating a dynamic system that adapts to different operational requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively holds fasteners upright during driving, improving nailing accuracy and durability by adjusting the injection hole's cross-sectional area to match the fastener size, reducing tilting and enhancing the machine's operational reliability.
Implementation Method 1
a spring-urged rotatable mechanism
Data Source
AI summary
The present application relates to a driving machine. The driving machine has a driver blade for striking a fastener and a nose portion having formed therein an injection passage which slidably guides the driver blade, and into which the fastener is fed to be injected therefrom. An injection hole from which the fastener is injected is specified at a leading end in an injecting direction of the injection passage. The injection hole is defined by a first guide portion and a second guide portion which is movable relative to the first guide portion so as to change a cross section, perpendicular to the injecting direction, of the injection hole. A positioning apparatus is provided to dispose the second guide portion at a plurality of positions relative to the first guide portion.