KR20180001125U - Bolt for Preventing Loosening And Tool for Fastening the Bolt - Google Patents

Abstract

The present invention relates to a bolt for preventing relaxation and a fastening tool therefor, which can prevent reverse rotation that can not be relaxed by a common method once fastened in order to prevent theft or arbitrary manipulation. The configuration of the bolt includes: A bolt head comprising a bolt head and a stem, wherein the bolt head is provided with a tool engaging portion at a center of an upper surface thereof so as to transmit rotational force using a fastening tool; Wherein the tool engagement portion has an odd number of torque transmitting projections formed upwardly in the circumferential direction; Wherein the torque transmitting member includes a torque transmitting surface whose surface direction is perpendicular to a locking direction of the bolt and a sliding surface which is inclined with respect to the direction of relaxation of the bolt.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a bolt for preventing a reverse rotation,

The present invention relates to a bolt for preventing a reverse rotation, and more particularly, to prevent a reverse rotation which can not be relaxed by a common method once it is fastened in order to prevent theft or arbitrary manipulation. And a fastening tool for the bolt.

A bolt is an important and basic fastening element for joining two separate elements, consisting of a bolt head and stem. The bolt head is for axially rotating the stem using a wrench, a screwdriver or a wrench. Some or all of the stem is provided with a right-hand or left-hand thread. The bolt can be joined to the hole provided with the female thread or can be combined with the nut.

The bolt with the right screw can be turned clockwise and tightened or rotated counterclockwise to relax. In some cases, it may be necessary not to loosen the bolts fastened once. There is a need to prevent theft, or to keep security, or to prevent arbitrary dismantling. Conventionally, bolts have also been sealed to prevent disassembly. However, it is not difficult to release the seal when you want to loosen the bolt with malice. In this case, the effect of the seal is minimal.

Korea Utility Model Registration Application Office 1996-039534 Korean Patent Application No. 10-2014-0175253

The present invention relates to a bolt for preventing a backward rotation which can not be relaxed by a general method once it is once engaged for theft prevention, security or safety, and a fastening tool for the bolt. . More specifically, it is an object of the present invention to provide a relaxation preventing bolt that can prevent reverse rotation that can not be relaxed unless the bolt is broken beyond the degree of sealing, and a fastening tool for fastening the bolt.

The above-

A bolt head comprising a bolt head and a stem, wherein the bolt head is provided with a tool engaging portion at a center of an upper surface thereof so as to transmit rotational force using a fastening tool;

Wherein the tool engagement portion has an odd number of torque transmitting projections formed upwardly in the circumferential direction;

Wherein the torque transmitting member includes a torque transmitting surface whose surface direction is perpendicular to the locking direction of the bolt and a sliding surface which is inclined with respect to the direction of relaxation of the bolt.

According to another feature of the present invention, the bolt head may be hemispherical like a round head rivet.

According to another feature of the present invention, the torque transmission passage may be three or five.

According to another feature of the present invention, the bottom surface of the central space surrounded by the torque transmission port may have a center portion deeper than the edge portion.

Another purpose of the invention is to:

A bolt for fastening the bolt of claim 1;

Hand grip; A tool insertion portion connected to the handle and provided with grooves through which a hexagonal wrench or a square wrench can be inserted; A square bar fitted in each of the grooves; An extension rod integrally connected to an end of the square bar;

And a bolt coupling part integrally provided at an end of the extension rod and engaging with the tool coupling part; And the bolt coupling portion includes a plurality of gear teeth engaged with the torque transmission hole and in surface contact with the torque transmission port.

According to the above configuration, since torque can be transmitted in the locking direction of the bolt but torque can not be transmitted in the direction of the loosening, a special type of bolt is provided which can not be relaxed by general means once it is fastened. Therefore, there is provided a bolt for preventing a relaxation, which can prevent the disassembly of the unauthorized person at will.

1 is a perspective view of an anti-relaxation bolt according to an embodiment of the present invention, and Fig. 2 is a plan view thereof.
Fig. 3 is a configuration diagram of the tool engagement portion of the anti-relaxation bolt according to the embodiment of the present invention.
Fig. 4 is a longitudinal sectional view of a torque transmission port of a tool engagement portion of a bolt for anti-relaxation according to an embodiment of the present invention; Fig.
5 is a front view of the anti-relaxation bolt according to the embodiment of the present invention.
6 is a perspective view of a fastening tool for fastening a bolt for anti-relaxation according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings attached hereto. 1 to 3 will be referred to basically and other drawings will be referred to when necessary.

The anti-relaxation bolt, which can prevent the reverse rotation by the present invention, is composed of the bolt head 10 and the stem 20 like any other bolt. The stem 20 in the form of a rod is provided with a thread 21 which is generally a right hand screw. However, in a special case, a left-handed person may be provided, and the scope of the right of the present invention is obvious. Hereinafter, a description will be made with reference to a right-handed screw that can be tightened by rotating clockwise.

The bolt head 10, which is circular in plan view, is provided with a tool engagement portion 30 at a center of its upper surface in a recessed shape. The tool engaging portion 30 is configured to be able to transmit a rotational force by using a fastening tool 50. [ As shown in FIG. 6, the fastening tool 50 refers to a special tool that is configured to transmit torque to the bolt of the present invention as much as possible.

The tool engagement portion 30 includes a plurality of torque transmission openings 31 arranged annularly along the circumferential direction. The torque transmission hole 31 is formed in an odd number and protrudes upward from the recessed bottom 35. According to the present embodiment, five torque transmission ports 31 are provided. However, it may be three or seven. It should not be provided in an even number, because it can be rotated in the relaxation direction by using a predetermined tool.

The torque transmission hole 31 is in the form of a triangular pyramid as shown in Fig. However, only the two faces are exposed to the outside and the other face is integral with the bolt head 10. Therefore, there are only two surfaces, that is, the torque transmitting surface 32 and the sliding surface 33, which are likely to transmit torque through the torque transmission hole 31. [

" 의 형태를 가질 수도 있다. 이 경우 토크전달면(32)은 곡면이 될 것이다. The torque transmitting surface 32 is a surface whose surface direction is perpendicular to the locking direction of the bolt, that is, the clockwise direction CW. The sliding surface 33 is a surface whose surface direction is inclined with respect to the relaxation direction of the bolt, that is, the counterclockwise direction CCW. Since the inclination K of the sliding surface 33 is sufficiently small (for example, 20 to 40 degrees), the force exerted in the counterclockwise direction CCW is dispersed, that is, a slip is generated, I can not. The torque transmitting surface 32 is in the form of a triangle, particularly a right triangle in which the vertical plane is located outward. However, when the inclined surface of the torque transmitting surface 32 is a quadratic curve, that is,

"In this case, the torque transmitting surface 32 will be a curved surface.

Of course, the angle formed by the torque transmitting surface 32 with respect to the horizontal line is a right angle or less. 4, the torque transmitting surface 32 is perpendicular to the vertical line V. As shown in Fig. Therefore, all of the force exerted in the direction of fastening the bolt, that is, in the clockwise direction (CW), can be used to fasten the bolt.

The sliding surface 33 may be a sloped surface as shown in Fig. 4 (a) or a sloped surface as shown in Fig. 4 (b). In the case of a curved surface, the volume of the torque transmission hole 31 may be large, which may be more advantageous in transmitting a large force. According to the present embodiment, since the torque transmitting surface 32 is triangular, the sliding surface 33 is inclined simultaneously in the radial direction and the circumferential direction of the bolt head 10.

According to another embodiment of the present invention, the bolt head 10 may have a hemispherical shape such as a round head rivet as shown in Fig. The angle (M) formed by the tangent of the top edge portion of the bolt head (10) may be 100 to 150 degrees. The edge portion of the bolt head 10 has a curved surface as shown in the figure, so that it can not be held and rotated by using a spanner, a clamp, a vise flyer, or the like.

According to another feature of the present invention, the bottom portion 35 of the central space surrounded by the torque transmission member as shown in Fig. 5 may have a center portion deeper than the edge portion. That is, the bottom surface 40a of the coupling portion of the predetermined tool 40 'is not brought into surface contact with the bottom 35 of the central space. The possibility of transmitting the torque through the strong surface contact is prevented.

A fastening tool 40 which can be used exclusively for the bolts of the present invention is shown in Fig. The fastening tool 40 may include a handle 41 for gripping by hand. The handle 41 is connected to the handle 42 with a tool fitting portion 43 provided with a groove into which a hexagonal wrench or a square wrench can be inserted. The fastening tool 40 is provided with an elongated rod 45 integrally connected to an end of the square bar 44 and a square bar 44 fitted in each groove and a tool engagement portion 30 of the bolt integrally provided at the end of the elongate rod (Not shown). The bolt engaging portion 50 has a plurality of engaging holes 52 engaged with the torque transmitting hole 31. The fitting hole 52 may be formed so as to exactly match all of the torque transmitting holes 31, that is, to make surface contact with two surfaces of the torque transmitting hole 31. The handle 41 can be configured to use a tool for generating a large rotational force such as a wrench or a wrench, The center portion 51 of the fitting hole 52 may be hollow or may be provided in a protruding shape so as to engage with the center of the tool engaging portion 30 and be in surface contact with the bottom 35 thereof.

The above description is only a few examples based on the technical idea of the present invention. Those skilled in the art will recognize that various modifications may be made by those skilled in the art without departing from the scope and spirit of the invention as expressed in the claims. For example, all of the above-described embodiments may be freely combined and practiced by those skilled in the art, and any combination thereof should be construed as being included in the scope of the present invention.

10: bolt head 20: stem
30: tool coupling portion 31: torque transmitting hole
32: torque transmitting surface 33: sliding surface
40: fastening tool 41: handle
50: bolt connecting portion 52:

Claims (5)

A bolt head comprising a bolt head and a stem, wherein the bolt head is provided with a tool engaging portion at a center of an upper surface thereof so as to transmit rotational force using a fastening tool;
Wherein the tool engagement portion has an odd number of torque transmitting projections formed upwardly in the circumferential direction;
Wherein the torque transmitting member includes a torque transmitting surface whose surface direction is perpendicular to the locking direction of the bolt and a sliding surface which is inclined with respect to the direction of relaxation of the bolt. volt. The method according to claim 1,
Wherein the bolt head may have a hemispherical shape like a round head rivet. The method according to claim 1,
And the torque transmission passage may have three or five torque transmission ports. The anti-relaxation bolt is capable of preventing reverse rotation, which can prevent reverse rotation. The method according to claim 1,
Wherein the bottom surface of the central space surrounded by the torque transmission port has a center portion deeper than the edge portion. A bolt for fastening the bolt of claim 1;
Hand grip;
A tool insertion portion connected to the handle and provided with grooves through which a hexagonal wrench or a square wrench can be inserted;
A square bar fitted in each of the grooves;
An extension rod integrally connected to an end of the square bar;
And a bolt coupling part integrally provided at an end of the extension rod and engaging with the tool coupling part;
And the bolt coupling portion includes a plurality of teeth for engaging with the torque transmission port and in surface contact with the torque transmission port.

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