Pneumatic Nailer Triggering for Safer Continuous Automatic Firing
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Solution Overview
Problem
Pneumatic nail guns with automatic mode face increased risks of unintentional triggering and injury due to accidental contact sensor activation, leading to malfunctions and premature termination of automatic operation.
Innovation Solution
The pneumatic nail gun features a triggering device with a contact sensor and force transmission element, where the control valve remains actuated until the contact sensor moves to an intermediate position, preventing unintentional triggering and allowing continuous automatic operation even with slight jumps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the trigger and contact sensor are actuated continuously to enable automatic mode operation, then productivity is improved by continuously driving in fasteners, but the risk of unintentional triggering and injury increases due to accidental contact sensor activation
Solution Approach 1:
The control valve is actuated in advance and remains in the actuated state throughout the automatic operation sequence. This preliminary action ensures that the system is ready for continuous fastener driving while the trigger and contact sensor remain actuated, eliminating the need for repeated valve actuation and enabling sustained automatic mode operation without increasing unintentional triggering risk
Solution Approach 2:
The system dynamically maintains the control valve in an actuated state during automatic mode, allowing the pneumatic nailer to continuously drive fasteners. The trigger and contact sensor remain actuated throughout the sequence, enabling the system to adapt to continuous operation requirements while maintaining safety through proper sequencing control
2Speed
If the control valve is actuated immediately when the contact sensor is actuated, then the response time is improved, but automatic mode operation is prematurely terminated when the contact sensor is accidentally actuated during operation
Solution Approach 1:
The control valve is actuated in advance and remains actuated throughout the automatic operation sequence. This preliminary action ensures immediate response when needed while maintaining system stability during continuous operation, as the valve stays in the actuated state rather than being repeatedly triggered and deactivated
Solution Approach 2:
The system uses feedback from the trigger and contact sensor actuation states to maintain the control valve in an actuated position throughout automatic mode. This feedback mechanism ensures that the valve remains open for continuous fastener driving while preventing premature termination, as the system continuously monitors the actuated state of the trigger and contact sensor
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
This design ensures safer and uninterrupted automatic mode operation by preventing unintentional triggering and maintaining continuous fastener driving, even with minor movements or jumps, thus reducing the risk of injury and operational disruptions.
Implementation Method 1
The contact sensor is a mechanical component that is held by a spring in a position that protrudes over a muzzle tool of the pneumatic nailer. If the pneumatic nailer is placed on a workpiece, the contact sensor is displaced against the force of the spring
Implementation Method 2
a working piston which is connected to a driving ram for driving in a fastener and is pressurized with compressed air when the driving process is triggered
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a compressed air nailer, comprising • a working piston (52) which is connected to a drive-in ram (50) for driving in a securing means and which is supplied with compressed air when a drive-in process is triggered, and • a trigger device which has a manually actuatable trigger (14), a contact sensor (24), and a force transmission element that interacts with the trigger (14) and the contact sensor (24) such that a control valve (38) can be actuated and a drive-in process can be triggered in the event of a common actuation of the trigger (14) and the contact sensor (24), wherein • the compressed air nailer is designed to continually drive in securing means in an automatic operation mode in the event of a permanent actuation of the trigger (14) and the contact sensor (24), • the contact sensor (24) has an adjustment path between a completely actuated first position and a completely non-actuated second position, and • the trigger device is designed such that the force transmission element does not actuate the control valve (38) if the contact sensor (24) is moved from the second position to the first position when the trigger (14) is actuated.