Fastener Ejection Path Structure for Accurate Driving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The driver blade in fastener driving machines reciprocates in the ejection path, leading to potential interference with the nose portion, limiting the shape and causing insufficient fastener positioning, inclination, or deformation, which can lower driving accuracy, and increasing the machine's size if restriction units are used to prevent these issues.
Innovation Solution
A fastener driving machine with an ejection unit and a striking unit that can reciprocate in two directions, featuring a raised portion on the ejection path walls to prevent fastener displacement and a recessed portion on the driver blade to avoid interference, maintaining machine size while improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the driver blade reciprocates in the ejection path formed by the nose portion, then the fastener can be driven into the opponent member, but contact (interference) between the nose portion and the driver blade occurs, limiting the shape of the nose portion and causing insufficient positioning of the fastener
Solution Approach 1:
A restriction unit is introduced as an intermediary component between the driver blade and the fastener. This restriction unit prevents direct contact and interference between the driver blade and the nose portion while maintaining the reciprocating motion of the driver blade, thereby solving the positioning accuracy issue without limiting the driver blade's operational range
2Manufacturing precision
If a restriction unit that prevents the inclination or deformation of the fastener is provided at the nose portion, then the fastener positioning is improved, but the driver blade may be elongated and the entire working machine is increased in size
Solution Approach 1:
Instead of elongating the entire driver blade, the restriction unit is localized at specific positions on the nose portion where fastener positioning is critical. This localized approach provides the necessary positioning accuracy without requiring the driver blade to be elongated, thereby avoiding an increase in the overall machine size
3Device complexity
If the shape of the nose portion is limited to avoid contact with the driver blade, then interference is prevented, but the fastener may be inclined or deformed by impact at the time of striking, lowering driving accuracy
Solution Approach 1:
The restriction unit serves as a mediator that allows the nose portion to maintain its simple shape while preventing fastener inclination and deformation. By positioning the restriction unit strategically, the design avoids the need for complex nose portion shapes while ensuring accurate fastener positioning and driving
Data Source
AI summary
A fastener driving machine according to one embodiment includes an ejection unit housing a fastener, and a driver blade configured to strike the fastener housed in the ejection unit. The ejection unit has a blade guide forming one side of an ejection path to which the fastener is supplied, a guide plate facing the blade guide and forming the other side of the ejection path, and a raised portion provided on the blade guide. The driver blade includes a recessed portion configured to receive the raised portion. The raised portion is positioned at the side of the fastener supplied to the ejection path, and suppresses entirety or part of the fastener from coming off the ejection path.