Nail Driving Machine Guide Part Prevents Fastener Clogging
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Solution Overview
Problem
The existing driving machines for fasteners often experience clogging due to a gap between the nose and contact parts of the ejection passage, which can cause the fastener head to fall into the gap, leading to operational issues, and increasing the length of the contact part to mitigate this increases the overall height of the machine.
Innovation Solution
Incorporating a guide part with an inclined guide surface that protrudes from the radial outer side into a housing groove within the contact part, ensuring the guide part enters the groove and forms part of the ejection passage's inner surface, preventing the fastener head from falling into the gap without lengthening the ejection passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the total length of the contact part is increased to keep the gap far away from the ejection port, then the possibility of the head part of the fastener falling into the gap is reduced, but the total length of the ejection passage increases and the overall height of the driving machine increases
Solution Approach 1:
The guide part introduces a radial dimension solution by protruding from the radial outer side toward the radial inner side of the ejection passage. Instead of extending the contact part axially (vertical dimension), the guide part uses radial protrusion to eliminate the gap issue, thereby solving the problem without increasing the overall height of the machine.
Solution Approach 2:
The guide part acts as an intermediary element between the nose part and the contact part. It fills the gap region with its guide surface, preventing the fastener head from falling into the gap while maintaining the existing ejection passage length and machine height.
2Stability of the object's composition
If the entire fastener is in the ejection passage, then tilt of the fastener is restricted by the inner peripheral surface, but once a portion of the fastener leaves the ejection port, the tilt-restricting effect decreases and the fastener may tilt easily causing the head part to fall into the gap
Solution Approach 1:
The guide surface is positioned to act on the fastener before it completely leaves the ejection passage. By providing guidance in advance as the fastener exits, the system prevents tilt from developing, thereby avoiding the clogging problem that would occur if the fastener tilted after exiting.
Solution Approach 2:
The guide part extends in the radial direction to provide tilt restriction, rather than relying solely on the axial length of the ejection passage. This radial extension allows the guide surface to maintain contact with the fastener and prevent tilt even as the fastener exits the ejection port.
Data Source
AI summary
A driving machine is provided to prevent clogging of a fastener in an ejection passage without increasing the total length of the ejection passage. A nail driving machine includes: a nose part forming an upper portion of an ejection passage through which a nail passes; a contact part being slidable along the nose part and forming a lower portion of the ejection passage; a driver blade striking a head part of the nail supplied to the ejection passage; and a guide part disposed in a lower portion of the nose part and guiding the nail passing through the ejection passage. The guide part has a guide surface inclining to protrude from a radial outer side toward a radial inner side of the ejection passage. A housing groove is formed in the contact part and the guide part enters the housing groove when the contact part slides along the nose part.