JP2005207567A - Nail with rotary screw piece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nail free of looseness with a secular change and easy to extract with continuous reverse turn as in a wood screw, having high joining force on a joined object such as a wood material. <P>SOLUTION: The nail 1 comprises a positive or negative groove 6 provided in the head for a driver to be used, a spiral screw form 4 provided at the upper end of a nail body 2, and a protruded screw piece 3 arranged at one columnar lower end in one vertically long line. It has a conical front end 5 in a sharp-pointed condition. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

Detailed Description of the Invention

Technical field to which the invention belongs

The present invention relates to a nail, and has a stronger joining force than a conventional nail by biting by slightly turning by driving.
Further, the present invention relates to a nail that can be easily pulled out by continuing to rotate in reverse.

Conventionally, there are some which have a binding force due to the frictional force of the body of the nail by driving the nail into the work piece made of wood, but the binding force is lower than that of the screw, and loosening occurs due to secular change.
Moreover, when removing a nail, it cannot be easily removed, and the surface of a to-be-joined part is often damaged.

The following things are known by the publication to improve these things.
There is a nail in which a plurality of projecting pieces formed long on a cylindrical body part are discontinuously linearly arranged at intervals. (For example, see Patent Document 1)
In addition, there is a screw nail in which a plurality of screw protrusions having a sword tip shape are arranged on the side surface of a cylindrical body portion along the circumferential surface length. (For example, see Patent Document 2)
In addition, there is a driving screw nail in which a thread is provided in a limited portion along both ends of the body portion of the nail. (For example, see Patent Document 3)
Further, there is a detachable drive-in stopper which is formed along a screw trajectory by forming a projecting body having an inclined surface from the upper part to the lower part around the body part of the nail and forming the front face of the leg part. (For example, see Patent Document 4)
In addition, there is a nail in which a concave groove is juxtaposed from the upper part to the lower part in the body part of the nail to prevent it from coming off. (For example, see Patent Document 5)

        Japanese Patent Laid-Open No. 2001-14027         Japanese Utility Model Publication No. 6-87710         Japanese Utility Model Publication No. 62-156614         Japanese Utility Model Laid-Open No. 01-017033.         Japanese Utility Model Publication No.57-010511

Problems to be solved by the invention

However, the conventional improved nail has the following problems.
In Patent Document 1, Patent Document 2, and Patent Document 3, work efficiency is poor because it is necessary to perform a rotating operation to increase the bonding force after driving.

Further, in Patent Document 2 and Patent Document 3, since a plurality of convex pieces are formed, a feeling of frictional resistance is felt when driving, particularly when it is hard wood, the work efficiency is lowered. is there.
In Patent Document 5, the nail portion is destroyed by driving, and the concave texture is weak, causing a problem in the bonding force.
And it is often bent by driving, and also when it is pulled out, the surface of the object to be joined is scratched.

  Therefore, in view of the above-mentioned problems, the present invention can withstand high loads because it can easily work and obtain a high bonding force just by driving it into a wood to be bonded with a hammer as in the case of conventional nails. It can be done.

  Moreover, a strong joining force can be exhibited by providing from the vicinity of the center of the convex chopping piece to the lower part so as to be suitable for a long body part nail.

Means for solving the problem

  In order to solve the above-mentioned problems, the present invention sets a screw shape in which a spiral shape is formed at the upper end of the nail body portion to a cylindrical shape from the lower end. And the convex screw piece which gave the inclination with respect to the horizontal surface was formed in the cylindrical end from the upper part to the lower part in the perpendicular | vertical line, It is characterized by the above-mentioned.

  Further, in order to make the nail body suitable for a long nail, a screw shape is provided at the upper end, and convex screw pieces are provided in a vertical line only at the lower part from the vicinity of the center of the nail body part. is there.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an embodiment of the present invention. As shown in the figure, a nail head 1 and a nail body 2 are formed, and the upper end of the nail body 2 is a screw 4 formed in a spiral shape.
The screw 4 is provided from the upper end to the lower end. A cylindrical body portion is formed from the lower end of the screw 4 and the convex screw piece 3 is formed in a vertical line at one end of the cylindrical shape from the top to the bottom. The convex screw piece 3 is a nail body portion. When 2 is vertical, it is inclined with respect to the horizontal plane.
Further, as shown in FIG. 1, the nail head 1 is provided so that a driver can be used by forming a groove 6 having a plus or minus shape.
Further, the tip 5 of the nail body 2 is provided to be sharp.

  Therefore, as shown in the enlarged view at the top of Fig. 2, by continuing to drive the object (wood, etc.) 7 with a hammer like the conventional nail, the nail body 2 is vertical in the first half of driving. However, the screw-shaped part 4 in the latter half bites into the joined part 7 and rotates slightly. As a result, as shown in the enlarged view of the A-A cross section of FIG. 3, the convex screw piece 3 is displaced from the collapsed shape 8 by rotating and moving at an angle θ, so Since the screw pieces 3 are long and arranged vertically, the frictional resistance is increased, thereby increasing the coupling force.

  Moreover, since it is the said convex screw piece 3 which is inclined when extracting, it is easy, without damaging the surface of the to-be-joined object 7 by hitting a screwdriver against the groove | channel 6 and continuing to rotate reversely. Can be pulled out.

  Note that the same effect can be obtained even if the nail body portion 2 is changed from a cylindrical shape to a conical shape.

FIG. 4 shows a second embodiment, and is a perspective view provided on the convex screw piece 3a only at the lower portion with a gap from the screw shape 4a at the upper end. By providing the convex screw 3a below the center, even if the nail body part 2a has a trunk length, the nail body part 2a can be driven into the article 7 and there is no resistance, and the driving operation can be performed efficiently.
And since the body part 2a is rotated and moved by the screw 4a (angle θ), it shifts to a part that is not collapsed by the convex screw piece 3a, so that the entire X part in FIG. As a result, the bonding force increases, so that it can withstand high loads.

  In addition, when extracting, it can extract easily by continuing reversely rotating as shown above.

The invention's effect

  Since the present invention is configured as described above, the following effects can be obtained.

The nail provided with the convex screw piece 3 according to claim 1, the driving into the article 7 can be operated with less frictional resistance like the conventional nail, and has a binding force that can withstand high loads. In addition, the bond strength is maintained unchanged over time.
When the workpiece 7 is pulled out, the nail body 2 can be easily pulled out without damaging the front surface of the workpiece 7 by continuing to rotate the nail body 2 in the opposite direction of the driving operation. Since it can be extracted without bending or deforming it, it can be reused and is economical.
In addition, the manufacturing cost is extremely low while the load is high.

The nail provided with the screw piece according to claim 2 is optimal for a long nail body by providing the convex kerf 3a in the nail body 2a below the center. Therefore, the frictional resistance of the workpiece 7 is increased, and a bonding force that can withstand a higher load is exhibited.
Further, when unplugging, it can be easily continued in the reverse direction as in the case of claim 1 and the work efficiency can be increased.
Moreover, it can be reused and is excellent in economic efficiency.

  It is a perspective view which shows the 1st Example of this invention.   It is an enlarged side view of the upper part which shows one Example which nailed the nail which provided the screw piece of this invention in the timber.   FIG. 3 is an enlarged view of the AA cross section of FIG. 2, in which the angle θ is rotated.   The 2nd Example of this invention is shown and it is the front view which rotated the screw piece.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a is a nail head 2, 2a is a nail body part 3, 3a convex screw piece 4, 4a is a helical screw shape 5, 6 is a front-end | tip part 6, 6a is a groove 7, 8 is a to-be-joined object 8

Claims (2)

  The nail head, the nail body, and the lower end are pointed, and a screw shape is provided in which the upper end of the nail body is formed in a spiral shape. One end of the cylinder is vertically aligned from the lower end to the bottom. A nail provided with a rotating screw piece, characterized in that a convex screw piece is provided.   2. The nail provided with a rotary screw piece according to claim 1, wherein the convex screw piece is provided vertically in a portion below the center of the body portion.

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