Gas Nailer Coil Feed Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing gas combustion type nail driving tools face challenges in using coil-type fastener connecting bodies due to unstable combustion gas supply, timing mismatch between combustion gas generation and nail feeding, and reduced driving power, leading to unreliable nail insertion.
Innovation Solution
A nail driving tool with a gas combustion chamber, electric spark ignition, and an electrically driven actuator for independent fastener feeding, allowing precise feeding of coil-shaped nails using sensors and a motor, separate power supply for the actuator, and a braking mechanism to prevent motor over-rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If gas combustion is used to drive the rod, then maneuverability and portability are improved, but stable combustion gas supply and timing control become difficult
Solution Approach 1:
The patent divides the driving system into two independent parts: a gas combustion system for rod driving and a separate electric actuator for fastener feeding. This segmentation allows each subsystem to operate independently with its own power source and control mechanism, resolving the contradiction between maneuverability and operational reliability.
Solution Approach 2:
The patent replaces the mechanical spring-based feeding mechanism with an electric actuator that can be precisely controlled. This substitution enables accurate timing control of fastener feeding relative to rod movement, solving the timing mismatch problem while maintaining the gas combustion system's maneuverability advantages.
2Productivity
If coil-type fastener connecting bodies are used, then productivity is improved by accommodating more fasteners, but feeding reliability decreases due to unstable combustion gas supply and timing mismatch
Solution Approach 1:
By separating the rod driving function (gas combustion) from the fastener feeding function (electric actuator), the system can reliably feed coil-type fasteners without being constrained by unstable combustion gas supply timing. The independent electric actuator provides consistent feeding control regardless of combustion variations.
Solution Approach 2:
The patent incorporates sensors to detect the position of the rod and fasteners, providing feedback to the control system. This enables precise synchronization of the electric actuator with rod movement, ensuring reliable feeding of coil-type fasteners even with the complexities of gas combustion timing.
3Device complexity
If a simple spring-based feed mechanism is used, then device complexity is reduced, but feeding precision and control are insufficient for coil-type fasteners
Solution Approach 1:
The patent replaces the simple mechanical spring-based feed mechanism with an electric actuator system. This substitution provides precise control over fastener feeding position and timing, enabling accurate feeding of coil-type fasteners while the added complexity is offset by the benefits of reliable operation.
Solution Approach 2:
The electric actuator is controlled by a microcomputer that automatically adjusts feeding based on sensor feedback from rod position and fastener status. This self-regulating capability provides high feeding precision without requiring complex manual adjustment mechanisms.
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
Enables reliable and precise feeding of coil-type nails, improving maneuverability and reducing the need for frequent tool replacements, while maintaining the advantages of gas combustion tools.
Implementation Method 1
a gas combustion chamber (24) which generates combustion gas by combustion of gas
Implementation Method 2
an electric spark type ignition plug (25) which ignites combustion gas in the combustion chamber (24)
Data Source
AI summary
A gas combustion type coil nailer is provided with (a) a main body (1) which is provided with combustion chamber; (b) a head part (3) which is disposed on the front surface of this; and (c) a magazine 4 which is disposed on the bottom surface of the head part (3) so that it can be attached and detached easily. A coil shaped nail connecting body is loaded onto the magazine (4). The head part (3) is provided with (d) a guide tube (35) through which the rod (17) and the nail n pass; and (e) with a feed motor (47). The nail connecting body N is fed to the guide tube (35) by a feed gear which is driven by the feed motor (47). Power is supplied to the feed motor (47) from a battery. The rod (17) is driven and the nail is fed by separate motive forces so that the nail can be fed reliably without adversely affecting the accuracy and reliability of the driving capacity of the rod (17).