JP2006307948A - Bolt head part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bolt head part capable of preventing the other object in contact with it from being damaged and realizing theft prevention. <P>SOLUTION: This bolt head part is constituted by connecting a head part and a screw part mutually and is provided with a plurality of semi-spherical recessed parts in the head part. The head part itself provided with the plurality of semi-spherical recessed parts is semi-spherical. The head part is composed of a semi-spherical part and is provided with the plurality of semi-spherical recessed parts being smaller than the head part. The maximum circumferential part of the semi-spherical head part has a gentle curved face, and the plurality of semi-spherical recessed parts are provided on the semi-spherical head part. Two to six semi-spherical recessed parts are provided in the head part, and dimension of the plurality of semi-spherical recessed parts in the head part is arbitrarily changed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  It relates to the head of bolts and nuts.

  The conventional bolts of minus and cross type are difficult to turn and the force escapes. The hook will be crushed when tightened, and tightening / loosening becomes impossible. The present invention has two and three points that are not likely to be smooth to catch and rotate the core, and does not catch the power point with dots and lines. It is made up.

Since the force point can be placed outside the bolt head, tightening torque can be improved. All bolt head surfaces are rounded, and the bolt head and screwdriver are the same surface that comes into close contact with each other, so it is ideally designed to be easily tightened with the entire bolt.
If the stroke is increased in the bolt height direction, the driver can stand up when tightening.
The design is such that the anti-theft bolt can be made by changing the dimensions of the surface shape over at least two bolt heads for each product manufacturing unit.
This design form can be used for all bolts.

As a result of intensive studies to solve the above-mentioned problems, the present invention has been achieved. That is, the present invention is a bolt head having a head and a screw connected to each other, and the head has a minus or + type. A bolt head characterized by providing a plurality of semicircular concave portions instead of the bolt head, wherein the head portion and the screw portion are connected to provide smoothness of the head itself. In addition, a bolt head characterized in that the head itself provided with a plurality of semi-spherical recesses is semi-spherical,
A bolt head in which a head and a screw part are connected, and the head has a semispherical shape, and a plurality of semispherical recesses smaller than the head so that force is applied evenly when tightening. It is a bolt head characterized by providing
A bolt head in which a head and a screw portion are connected, the head is formed in a semispherical shape, and a maximum circumferential portion of the hemispherical head that is a contact end portion with the screw portion of the head is A bolt head characterized by having a gradual aspect and providing a plurality of semispherical recesses on the hemispherical head,
A bolt head in which a head and a screw part are connected, and a bolt head characterized in that two to six semispherical concave portions are provided in the head according to the size of the head,
A bolt head having a head and a screw connected to each other, wherein the head has a plurality of semi-spherical concave shapes arbitrarily changed to prevent theft. Is part.
The bolt head of the present invention is characterized by a semi-spherical shape, but also includes a shape in which the upper part of the semi-spherical shape is cut to form a circular flat plate.

1) Since the tip of the bolt head is bowl-shaped, it does not damage other equipment that comes into contact.
2) Since the projections corresponding to the end protrusions (Extension Parts) that fit into the plurality of recesses on the bolt head have a gentle relationship between a circle and a hemisphere, the fitting uneven parts are not damaged. Both members do not wear.
3) Since the hemisphere maximum circumference of the bolt contact end of the bolt head is rounded, other equipment that comes in contact will not be damaged.
4) It can also be used as an anti-theft bolt by changing the fitting uneven member as desired.

BEST MODE FOR CARRYING OUT THE INVENTION

  A bolt head in which a head and a screw portion are connected, and the head is formed in a semi-spherical shape, and has a semi-spherical shape smaller than the semi-spherical portions of a plurality of heads that serve as a base for rotation on the head. A bolt head characterized by providing a recess, and more specifically, a bolt head in which the head and a screw portion are connected, the head comprising a semi-spherical shape, the semi-spherical shape A bolt head characterized in that the maximum circumference of the head has a gradual aspect, and a plurality of semi-spherical recesses are provided on the semi-spherical head. A bolt head connected to each other, wherein the head is provided with two to six semi-spherical recesses, wherein the head and the screw are connected to each other. It is a bolt head characterized by preventing theft prevention by arbitrarily changing the dimensions of a plurality of semi-spherical concave shapes on the head.

The present invention will be described with reference to the drawings. Drawings 1 and 3 are perspective views of the safety bolt head shape of the present invention.
In the bolt head BH in which the head 1 and the screw part 2 are connected, the bolt head 1 is provided with a plurality of semicircular concave portions 1a (three in FIGS. 1 and 3) in the head 1.
In the present invention, the head is composed of a bolt head in which the head 1 and the screw portion 2 are connected, and is provided with a plurality of semicircular recesses 1a so as not to damage the equipment that the bolt head BH contacts. The part itself has a structure of a bolt head BH characterized by a semi-spherical SB.

In FIG. 1, in the bolt head BH in which the head 1 and the screw portion 2 are connected, it is natural that the head 1 has a semispherical shape and a plurality of semicircles smaller than the head 1. A spherical recess 1a is provided.
In the bolt head BH in which the head 1 and the screw part 2 of the present invention are connected, the head 1 is formed in a semi-spherical shape, and the semi-spherical shape is used to prevent frictional scratches between the aesthetic appearance and other equipment. The maximum circumferential portion 1c of the spherical head is in a gradual phase, and a plurality of semicircular concave portions 1a are provided on the semispherical head SB.

In the bolt head in which the head 1 and the screw portion 2 of the present invention are connected, two semicircular concave portions provided in the head 1 are provided according to the size of the bolt head BH (see FIG. 4). To six semicircular concave portions 1a.
From the standpoint of theft prevention, in the bolt head BH in which the head 1 and the screw portion 2 of the present invention are connected, the dimensions of a plurality of semi-spherical recess shapes 1a are arbitrarily changed slightly on the head 1. It becomes possible by letting.

FIG. 2 is a perspective view of the bolt tightening extension 3 of the bolt head BH / semispherical head SB of the present invention.
In order to fit the semicircular concave portion 1a of the bolt head BH in FIG. 1, a convex portion is provided corresponding to the concave portion. A bolt tightening circumferential end 3b is provided corresponding to the lower end circumference 1c of the bolt head BH.
The present invention also includes a shape in which the top of a semi-spherical shape is cut into a flat plate 4 as shown in FIG.

FIG. 1 is a perspective view of a bolt head. FIG. 2 is a perspective view of the bolt tightening extension. FIG. 3 is an enlarged perspective view of the bolt head of FIG. FIG. 4 is a perspective view showing two bolt head recess machinings according to the present invention. FIG. 5 is a perspective view of the bolt head portion obtained by cutting the top of the bolt head portion of the present invention into a flat plate.

Explanation of symbols

1 Head (Head)
1a Bolt head semicircular recess 1b Bolt head lower end 1c Bolt head lower end circumference 2 Bolt screw part 3 Bolt tightening extension 3a Bolt tightening semicircular convex part 3b Bolt tightening circumferential end 4 Bolt Head tip flat part BH Bolt head SB Semi-spherical head

Claims (7)

  A bolt head in which a head and a screw portion are connected, wherein a plurality of semicircular concave portions are provided in the head.   The bolt head according to claim 1, wherein the head is a bolt head in which the head and the screw portion are connected, and the head itself provided with a plurality of semicircular concave portions is semispherical.   A bolt head having a head and a screw connected to each other, wherein the head is formed in a semispherical shape, and a plurality of semispherical recesses smaller than the head are provided. The bolt head according to claim 2.   A bolt head in which a head and a screw portion are connected, the head comprising a semi-spherical shape, and a maximum circumferential portion of the semi-spherical head having a gradual aspect, the semi-spherical head The bolt head according to claim 1, wherein a plurality of semicircular concave portions are provided on the portion.   A bolt head having a head and a screw connected to each other, wherein two to six semicircular spherical recesses are provided on the head. Or the bolt head according to claim 4.   A bolt head having a head and a screw connected to each other, wherein the dimensions of a plurality of hemispherical concave shapes are arbitrarily changed slightly on the head. The bolt head according to claim 3, 4 or 5. A head having a head and a screw connected to each other, wherein the tip of the head has a flat circular shape, and a plurality of semi-spherical recesses are provided on the head. Department.

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