Nail Tip Guide Tool for Straight Nailing and Pilot-Hole Fastening
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Solution Overview
Problem
Existing nailing machines often drive nails into mounting materials in a tilted state due to the inner diameter of the nose being larger than the nail head, leading to structural complexity and inefficiencies.
Innovation Solution
A funnel-shaped container with guide pieces that correct the nail's posture by expanding and contracting radially, using a coil spring to bias the guide pieces, ensuring the nail is driven straight into the mounting material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the inner diameter of the nose is larger than the outer diameter of the nail head, then the nail can be easily inserted into the nose, but the nail becomes tilted with respect to the axis of the nose and is driven into the mounting material in a tilted state
Solution Approach 1:
A guide member is introduced as an intermediary component between the nose and the mounting material. The guide member includes a guide surface that contacts the nail head and a guide protrusion that extends into the mounting material, creating a guiding path that maintains nail alignment while allowing easy insertion through the nose.
Solution Approach 2:
The solution adds a spatial dimension by extending the guide protrusion into the mounting material along the nail driving direction. This creates a three-dimensional guiding path that constrains the nail to move straight, transforming the problem from a two-dimensional alignment issue at the nose opening to a three-dimensional constrained motion path.
2Manufacturing precision
If a guide mechanism with a ratchet member and guide surface is used to correct nail inclination, then the nail can be driven straight, but the structure of the injection port becomes complicated and the device size increases
Solution Approach 1:
The complex ratchet member mechanism is extracted and replaced with a simpler guide member structure. The essential function of guiding the nail is retained through the guide surface and guide protrusion, while eliminating the complicated ratchet mechanism and associated components, thus simplifying the injection port structure.
Solution Approach 2:
Instead of making the entire injection port structure complex, the solution applies local quality by adding only the necessary guide surface and guide protrusion elements at specific locations where guidance is needed. The rest of the injection port structure remains simple and unchanged.
3Manufacturing precision
If a guide mechanism with a ratchet member is used to correct nail inclination, then the nail can be driven straight, but the device size increases
Solution Approach 1:
The bulky ratchet member mechanism is extracted and replaced with a compact guide member structure. The guide surface and guide protrusion achieve the same nail correction function with significantly reduced dimensions, decreasing the overall device volume.
Solution Approach 2:
Instead of using a complex active mechanism (ratchet member) to force the nail into alignment, the solution inverts the approach by using a passive geometric structure (guide surface and guide protrusion) that naturally guides the nail into the correct position through its shape, eliminating the need for bulky actuating components.
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
The solution allows for reliable straight nailing of nails into various materials, including reinforcing hardware, with a simple and efficient structure that corrects nail inclination.
Implementation Method 1
a coil spring 15 is provided on the upper surface of the press board 16 so as to press the press board downward, so that the plurality of guide pieces are biased in a direction of contracting the guide pieces toward the central portion
Implementation Method 2
the tip of the oblique nail is guided to a center of a mortar-shaped lower portion and the nail is interposed in the central portion of the aggregate of the gathered guide pieces to push and expand the plurality of guide pieces in the right-left direction
Data Source
Figure 1
Figure 2
Figure 3(a)~4(b)
AI summary
[Problem] It is difficult with prior-art nailing machines to correctly maintain the posture of a nail to strike, thus inconvenience such as the nail bending or the attachment being oblique occurs when the nail is struck for fixing, and if the attachment member is a metal piece or the like, it is not easy to fasten the nail to a pilot hole for nail fastening. [Solution] A nail tip guide tool according to the present invention is attached to an end portion of a nose of a nailing machine to provide a plurality of guide piece members on a bottom surface inside same, the nail guide tool having a lower portion in a funnel shape. The guide pieces are formed so that a recess in a mortar shape is formed in the top surfaces of the guide pieces when the guide pieces are brought together at the center of the funnel shape by a press board member biased by a coil spring. The guide pieces are used so that in the nose, the tip of a nail in an inclined posture is guided to a center portion of the mortar shape and is inserted thereamong, and the posture thereof is corrected as a result. Moreover, for fastening a metal piece or the like with a nail, distal ends of the plurality of guide pieces are structured so as to form a conical shape, and with this portion having been fitted into a pilot hole of the metal piece, the nail is struck; in this way the operation can be completed with ease.