Powered Fastener Driver Sensor Jam Prevention
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Solution Overview
Problem
Powered fastener drivers often fail to accurately determine the position of the fastener delivery mechanism, leading to potential jamming issues and inefficient operation, as they lack effective sensors to monitor the movement and positioning of the fastener delivery mechanism and workpiece contact bracket.
Innovation Solution
The implementation of a powered fastener driver with a sensor system that includes sensors to detect the movement of the workpiece contact bracket and the fastener delivery mechanism, allowing the driver to fire only when the fastener is properly positioned in the driving channel, preventing jams by monitoring the position of the fastener delivery mechanism and ensuring accurate fastener loading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensors are added to monitor the fastener delivery mechanism position, then operational reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback by using sensors to detect the position of the fastener delivery mechanism and workpiece contact bracket, then using this information to control when the driver can fire. The system continuously monitors whether the fastener is properly positioned and only allows operation when conditions are correct, creating a closed-loop control system that improves reliability.
Solution Approach 2:
The patent replaces mechanical position-detection methods with sensor-based detection systems. Instead of using mechanical switches or physical contacts to determine fastener position, the system uses sensors (such as optical or magnetic sensors) to non-contactly detect the position of the fastener delivery mechanism and workpiece contact bracket, reducing mechanical wear and improving detection accuracy.
2Productivity
If sensor monitoring is implemented to prevent jams, then productivity is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by using sensors to detect fastener position and mechanism state before the driving operation occurs. The system checks whether the fastener delivery mechanism is in the correct position and whether the workpiece contact bracket is properly positioned before allowing the driver to fire, preventing jams before they occur and maintaining continuous productive operation.
Solution Approach 2:
The feedback mechanism continuously monitors the fastener delivery mechanism position and workpiece contact bracket position, providing real-time information to the control system. This allows the system to prevent operation when conditions are not correct, avoiding jams and maintaining high productivity by ensuring only proper operations are attempted.
3Manufacturing precision
If fastener position monitoring is added, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent replaces mechanical measurement methods with sensor-based detection to determine fastener position. Sensors detect the position of the fastener delivery mechanism and workpiece contact bracket with high precision without mechanical contact, enabling accurate determination of whether the fastener is properly positioned in the driving channel while avoiding mechanical wear and complexity.
Solution Approach 2:
The patent uses sensors as intermediary devices between the fastener delivery mechanism and the control system. These sensors act as mediators that detect the position of mechanical components and convert this information into electrical signals that the control system can process, enabling precise monitoring without direct mechanical measurement.
Data Source
AI summary
A powered fastener driver includes a housing, a nosepiece extending from the housing, a driver blade movable within the nosepiece between a ready position and a driven position, a piston coupled to the driver blade for movement therewith, a driver cylinder within which the piston is movable, a magazine coupled to the nosepiece in which collated fasteners are receivable, a fastener delivery mechanism coupled to the nosepiece for individually transferring collated fasteners in the magazine to a fastener driving channel in the nosepiece, the fastener delivery mechanism movable between a fastener retrieval position and a fastener delivered position, and a sensor for determining a position of the fastener delivery mechanism.