Nail Driver Guide Last Nail Positioning Mechanism
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Solution Overview
Problem
In nailing machines, the last nail of a bundled resin strip often deviates from the correct driving position due to lack of support, leading to improper positioning or being driven with the next nail, as existing structures cannot accurately place it during the movement of the driver guide.
Innovation Solution
A driven member holding mechanism that independently maintains the last nail at the correct driving position within the driver guide, using an internally exposed member or engaging mechanism that does not move with the driver guide, ensuring accurate placement and preventing interference during driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driver guide moves to detect the contact state of nails, then the nail driving operation is enabled only when the contact top is pressed against the object, but the last nail cannot be supported by the inter-nail support via the bundle resin strip, causing it to deviate from the correct driving position
Solution Approach 1:
The support function is segmented into two independent parts: the bundle resin strip provides inter-nail support for most nails, while a separate last nail support structure (such as a support protrusion or cavity) provides dedicated support for the last nail. This segmentation allows each structure to perform its specific function without interference, ensuring both safety control and positioning accuracy.
Solution Approach 2:
An intermediary support structure is introduced between the driver guide and the last nail. This intermediary element (such as a support protrusion on the driver guide or a dedicated cavity) acts as a mediator to hold the last nail in the correct position, preventing it from deviating when the driver guide moves for contact state detection.
2Ease of operation
If the driver guide is made movable to detect contact state, then safety control is improved, but the last nail gets deviated from the correct driving position due to lack of support during driver guide movement
Solution Approach 1:
The support system is segmented to provide dedicated support for the last nail separate from the general nail support. This allows the driver guide to move freely for contact state detection while the last nail remains held in position by the specialized support structure.
Solution Approach 2:
The last nail support structure is designed in advance to be in place before the driver guide moves for contact state detection. This preliminary positioning ensures that when the driver guide moves, the last nail is already supported and cannot deviate from the correct driving position.
3Device complexity
If no additional support structure is added for the last nail, then device complexity is reduced, but the last nail cannot be correctly positioned at the driving position
Solution Approach 1:
The last nail support function is merged with the existing driver guide structure by integrating a support protrusion or cavity directly into the driver guide. This merging approach adds minimal complexity while providing the necessary support, as the support structure becomes part of the existing component rather than a separate addition.
Solution Approach 2:
Instead of adding support structures throughout the entire driver guide, the local quality principle is applied by adding support only at the specific location where the last nail is positioned. This localized approach (such as a single support protrusion or cavity at the rear end) provides the necessary positioning accuracy with minimal added complexity.
Data Source
AI summary
A driving tool may include a driven member holding mechanism configured to hold the driven member at a driving position inside a driver guide until a driver drives the driven member.