KR102202423B1 - Bolt structure for loosing prevention by magnatic force and bolting apparatus using the same - Google Patents

Abstract

The present invention relates to a bolt structure having a structure to prevent loosening by magnetic force, and a bolt fastening device using the same, and it is possible to rotate only with a dedicated jig having a magnet to prevent the bolt from loosening, thereby preventing accidents in which the bolt is loosened by external shock or vibration. In addition, since it is possible to rotate only with a dedicated jig, it is impossible to separate it with a general tool other than a dedicated jig, so when the user intends to unfairly change or infringe the technology with impure intention, or the intruder arbitrarily disassembles a technically sensitive part, causing a breakdown. Disassembly and attempt of possible components.

Description

A bolt structure having a structure to prevent loosening by magnetic force and a bolt fastening device using the same {BOLT STRUCTURE FOR LOOSING PREVENTION BY MAGNATIC FORCE AND BOLTING APPARATUS USING THE SAME}

The present invention relates to a bolt structure having a structure to prevent loosening by magnetic force, and a bolt fastening device using the same, and more particularly, a bolt having a structure to prevent loosening by magnetic force to prevent arbitrary release of bolts mounted on an assembly using magnetic force. The invention relates to a structure and a bolt fastening device using the same.

In general, bolts and nuts are fastening elements used to fasten and fix a plurality of parts together and are widely used in various fields.

However, since the bolt and nut maintain the fastening force by the frictional force between the female screw and the male screw, there is a disadvantage that they are easily released by shock and vibration.

Accordingly, various structures have been studied to prevent loosening after fastening of bolts and nuts.

As an example, Korean Patent Laid-Open Publication No. 10-1999-0019896 discloses a structure for preventing loosening of bolts and grooved nuts.

The disclosed structure includes a grooved nut having a plurality of fixing grooves formed in a radial shape, and a bolt having a plurality of fixing feet protruding to be seated in the fixing groove of the grooved nut. In this structure, it is difficult to process the fixed foot extended at the end of the bolt, and since the fixed foot must be bent one by one after fastening, there is a problem that the work man-hour and working time are delayed.

In addition to this, various anti-loosening bolts have appeared, but the structure is complicated, making it inconvenient to manufacture and use, and there is a drawback that the anti-loosening effect gradually decreases over time.

On the other hand, in recent years, accidents about technology leaks are frequently occurring, and it has become a major social issue.

In addition, most of the technology leakage is achieved through disassembly of components, and the conventional bolted fastening structure has a structure that is difficult to prevent technology leakage through disassembly because it is easy to disassemble.

In addition, Korean Patent Laid-Open Publication No. 10-1999-0019896 discloses a structure for preventing loosening of bolts and grooved nuts, which prevents loosening due to shock and vibration by allowing the bolt to rotate when a strong force to cut the split pin is applied. However, it is a structure that can be substantially decomposed, so it cannot prevent the leakage of technology through decomposition.

Korean Patent Laid-Open Publication No. 10-1999-0019896 discloses a structure for preventing loosening of bolts and nuts with grooves (published on March 25, 1999).

An object of the present invention is to provide a bolt having a structure that prevents loosening by magnetic force, and a bolt fastening device using the same, which can be rotated only with a dedicated jig having a magnet and thus prevents the bolt from loosening.

In order to achieve the object of the present invention, an embodiment of a bolt structure having a self-locking structure according to the present invention is a first bolt body member having a screw thread for fastening on the outer circumferential surface, and the first bolt body member It includes a second bolt body member rotatably coupled and rotatable by a tool, wherein the first bolt body member and the second bolt body member are integrally rotated by magnetic force, and when the magnetic force is removed, the second bolt body member The two-bolt body member is separated from the first bolt body member and rotates separately.

One embodiment of the bolt structure having the structure to prevent loosening by magnetic force according to the present invention is moved by magnetic force to connect the first bolt body member and the second bolt body member to rotate integrally, and when the magnetic force is released, the original position It may further include a bolt connection member that is returned to and separates the first bolt body member and the second bolt body member.

In the present invention, the bolt connecting member is inserted into the first bolt body member while moving to the upper side by the magnetic force of the tool coupled to the second bolt body member while a portion of the lower side is inserted into the first bolt body member. In the state, a portion of the upper side is coupled to the second bolt body member to connect the first bolt body member and the second bolt body member, and the bolt connection member descends when separated when the magnetic force is released and returns to its original position. A portion inserted into the second bolt body member may be separated from the second bolt body member.

In the present invention, a bolt insertion part opened upward is located inside the first bolt body member, and an elevating movement space in which the bolt connecting member is inserted so as to move up and down is located in the bottom surface of the bolt insertion part. In addition, the bolt connection member may be inserted into the elevating movement space and positioned so that the upper end thereof coincides with the bottom surface of the bolt insertion unit or has a height lower than the bottom surface of the bolt insertion unit.

In the present invention, the second bolt body member is a bolt connection groove in which the tool coupling part is located on the upper surface and protrudes from the lower part of the head, is inserted into the bolt insertion part, and a part of the upper side of the bolt connection member is inserted into the lower surface. It may include an additionally positioned connection body.

In the present invention, the tool coupling portion may be positioned with a magnet insertion portion into which the magnet portion of the tool can be inserted.

In the present invention, the bolt insertion portion is a body passage inlet that is opened so that the connection body portion is passed and inserted into the interior; And a bolt insertion space located inside the body passage inlet and having a diameter larger than the body passage inlet, and a first screw thread is positioned on the inner circumferential surface of the body passage inlet, and the connection body part is on the lower outer circumferential surface. A second threaded portion that is screwed to the first screw thread and passes through the body passage inlet may be positioned, and an idle portion may be positioned at an upper side of the second screw thread at the body passage inlet so that the connection body portion can be idle.

An embodiment of the bolt structure having a structure for preventing loosening by magnetic force according to the present invention may further include a position fixing magnet member positioned within the second bolt body member and fixing the position of the bolt connection member by magnetic force.

In order to achieve the object of the present invention, an embodiment of the bolt fastening device according to the present invention includes a bolt structure and a magnet part, and a dedicated tool that is detachably coupled to the bolt structure to rotate the bolt structure. The bolt structure includes a first bolt body member having a screw thread for fastening on an outer circumferential surface thereof, and a second bolt body member rotatably coupled to the first bolt body member and rotatable by the dedicated tool, When the first bolt body member and the second bolt body member are integrally rotated by the magnetic force of the magnet portion, and the dedicated tool is separated to remove the magnetic force of the magnet portion, the second bolt body member is the first bolt It is characterized in that it is separated from the body member and rotated separately.

An embodiment of the bolt fastening device according to the present invention is moved by the magnetic force of the magnet unit to connect the first bolt body member and the second bolt body member to rotate integrally, and when the magnetic force is released, it returns to its original position. It may further include a bolt connection member separating the first bolt body member and the second bolt body member.

In the present invention, the bolt connecting member is inserted into the first bolt body member while moving to the upper side by the magnetic force of the tool coupled to the second bolt body member while a portion of the lower side is inserted into the first bolt body member. In the state, a portion of the upper side is coupled to the second bolt body member to connect the first bolt body member and the second bolt body member, and the bolt connection member descends when separated when the magnetic force is released and returns to its original position. A portion inserted into the second bolt body member may be separated from the second bolt body member.

In the present invention, a bolt insertion part opened upward is located inside the first bolt body member, and an elevating movement space in which the bolt connecting member is inserted so as to move up and down is located in the bottom surface of the bolt insertion part. In addition, the bolt connection member may be inserted into the elevating movement space and positioned so that the upper end thereof coincides with the bottom surface of the bolt insertion unit or has a height lower than the bottom surface of the bolt insertion unit.

In the present invention, the second bolt body member is a bolt connection groove in which the tool coupling part is located on the upper surface and protrudes from the lower part of the head, is inserted into the bolt insertion part, and a part of the upper side of the bolt connection member is inserted into the lower surface. It may include an additionally positioned connection body.

In the present invention, the tool coupling portion may be positioned with a magnet insertion portion into which the magnet portion of the tool can be inserted.

In the present invention, the bolt insertion portion is divided into a body passage inlet opened to pass through the connection body and inserted into the body passage inlet, and a bolt insertion space that is a space having a diameter larger than that of the body passage inlet, and A first screw thread is located on the inner circumferential surface of the passage inlet, and the connection body is screwed to the first screw thread on the lower outer circumferential surface, and a second screw thread passing through the body passage inlet is located, and on the upper side of the second screw thread. An idle portion may be positioned at the body passage entrance so that the connection body portion can be idle.

An embodiment of the bolt fastening device according to the present invention may further include a position fixing magnet member positioned within the second bolt body member and fixing the position of the bolt connection member by magnetic force.

In the present invention, the magnet portion of the dedicated tool may have a magnetic force stronger than that of the magnet member.

The present invention has the effect of preventing the bolt from loosening due to external shock or vibration by rotating only with a special jig having a magnet.

In addition, the present invention can be rotated only with a dedicated jig having a magnet, so it is impossible to separate it with a general tool other than a dedicated jig. It has the effect of preventing disassembly and attempts of components that may cause breakdown by disassembling.

1 is an exploded perspective view showing an embodiment of a bolt structure having a structure to prevent loosening by magnetic force according to the present invention.
2 is a cross-sectional view of a first bolt body member in a bolt structure having a structure to prevent loosening by magnetic force according to the present invention.
3 is a cross-sectional view of a second bolt body member in a bolt structure having a structure to prevent loosening by magnetic force according to the present invention.
4 is a cross-sectional view of a bolt structure having a structure for preventing loosening by magnetic force according to the present invention.
5 is a cross-sectional view showing another embodiment of a bolt structure having a structure to prevent loosening by magnetic force according to the present invention.
Figure 6 is an exploded perspective view showing an embodiment of the bolt fastening device according to the present invention.
7 is a cross-sectional view showing an example of using the bolt fastening device according to the present invention.

The present invention will be described in more detail.

The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to the detailed description of the present invention, terms or words used in the present specification and claims described below should not be construed as being limited to their conventional or dictionary meanings. Accordingly, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all the technical spirit of the present invention, and thus various alternatives that can be substituted for them at the time of application It should be understood that there may be equivalents and variations.

1 is an exploded perspective view showing an embodiment of a bolt structure 10 having a structure for preventing loosening by magnetic force according to the present invention, and FIG. 2 is a bolt structure 10 having a structure for preventing loosening by magnetic force according to the present invention. ) Is a cross-sectional view of the first bolt body member 100, and FIG. 3 is a cross-sectional view of the second bolt body member 200 in the bolt structure 10 having a self-locking structure according to the present invention, and FIG. 4 is A cross-sectional view of a bolt structure 10 having a structure for preventing loosening by magnetic force according to the present invention.

An embodiment of a bolt structure 10 having a structure for preventing loosening by magnetic force according to the present invention will be described in detail below with reference to FIGS. 1 to 4.

An embodiment of the bolt structure 10 having a structure for preventing loosening by magnetic force according to the present invention includes a first bolt body member 100 having a screw thread for fastening on an outer circumferential surface thereof.

The first bolt body member 100 is a screw thread for fastening a bolt on an outer circumferential surface, that is, a fastening hole corresponding to a nut or a nut, a fastening groove, and a portion that couples and fixes a plurality of parts to each other and is formed in a cylindrical body. This is an example.

The second bolt body member 200 is detachably coupled to the first bolt body member 100, and the second bolt body member 200 has a tool coupling portion 200a that can be coupled to the tool on the upper surface. do.

As an example, the tool coupling portion 200a is a cross-shaped groove portion, and in addition to the straight groove portion, a hexagonal groove portion, etc., the second bolt body member 200 is coupled to the end of the tool to be rotated in various forms. It should be noted that it can be modified and implemented.

The first bolt body member 100 and the second bolt body member 200 are rotated integrally by magnetic force, and when the magnetic force is removed, the second bolt body member 200 is separated from the first bolt body member 100 And rotated separately.

The bolt structure 10 having the structure for preventing loosening by magnetic force according to the present invention is moved by magnetic force to connect the first bolt body member 100 and the second bolt body member 200 to be rotated integrally, and the magnetic force is When released, it may further include a bolt connection member 300 that returns to its original position to separate the first bolt body member 100 and the second bolt body member 200.

As an example, the bolt connection member 300 is a magnetic body attached to a magnet so that it can be raised and lowered by magnetic force, or has a structure in which a magnetic body is inserted therein.

It should be noted that the magnetic material can be variously modified and implemented into a known magnetic material that can be attached to the magnet part of a dedicated tool by magnetic force.

Bolt connection member 300 is inserted into the first bolt body member 100 to the upper side by the magnetic force of the magnet provided in a dedicated tool coupled to the tool coupling portion (200a) of the second bolt body member (200). While moving, while a portion of the lower side is inserted into the first bolt body member 100, a portion of the upper side is coupled to the second bolt body member 200, so that the first bolt body member 100 and the second bolt body member 200 ).

In addition, the bolt connection member 300 is lowered and returned to its original position when the dedicated tool is separated from the tool coupling portion 200a, so that the portion inserted into the second bolt body member 200 is separated from the second bolt body member 200 do.

In more detail, inside the first bolt body member 100, a bolt insertion portion 110 opened to the top is positioned, and a bolt connecting member 300 is inserted into the bottom surface of the bolt insertion portion 110, The elevating movement space 120 positioned to be movable is located.

The bolt connection member 300 is inserted into the elevating movement space 120 so that the upper end thereof coincides with the bottom surface of the bolt insertion unit 110 or has a height lower than the bottom surface of the bolt insertion unit 110.

As an example, the bolt connection member 300 has a height equal to or lower than the depth of the elevating movement space 120 and has a rectangular block shape that does not protrude upward.

The second bolt body member 200 protrudes from the head 210 where the tool coupling portion 200a is located on the upper surface, the lower portion of the head 210, is inserted into the bolt insertion portion 110, and is bolted to the lower surface. It includes a connection body 220 in which a bolt connection groove 221 into which a portion of the upper side of the member 300 is inserted is positioned.

The bolt connection groove 221 is positioned to correspond to the elevating movement space 120 so that the bolt connection member 300 elevating in the vertical direction in the elevating movement space 120 can be smoothly inserted.

The head 210 is mounted on the upper surface of the first bolt body member 100 and has a diameter equal to or greater than the diameter of the first bolt body member 100.

In addition, as an example, a magnet insertion portion 200b into which a magnet portion of a dedicated tool can be inserted is positioned at the center of the tool coupling portion 200a.

The magnet insertion portion 200b is positioned in the tool coupling portion 200a so that the magnet portion can be inserted together into the magnet insertion portion 200b when the end side of the dedicated tool is inserted into the tool coupling portion 200a.

The bolt insertion part 110 is located inside the body passage inlet 111, the body passage inlet 111, which is opened so that the connection body 220 passes and is inserted into the body, and has a larger diameter than the body passage inlet 111. It is divided into a bolt insertion space 112 which is a space.

In addition, a first threaded portion 111a is positioned on the inner circumferential surface of the body passage inlet 111, and the connection body portion 220 is a second threaded portion 220a screwed to the first threaded portion 111a on the lower outer circumferential surface. ) Is located and is located at the body passage inlet 111 on the upper side of the second screw thread portion 220a so that the connection body portion 220 can be idle, and an idle portion 220b is positioned.

The idling portion 220b is a portion having a flat outer circumferential surface and is not fastened to the first threaded portion 111a and is positioned within the body passage inlet 111.

The connection body part 220 passes through the first threaded part 111a while the second threaded part 220a is screwed, so that the second threaded part 220a is located in the bolt insertion space and the idle part 220b passes through the body. It is located at the inlet 111 and can be idle separately from the first bolt body member 100, and the second threaded portion 220a is caught by the first threaded portion 111a and is not removed from the first bolt body member 100. Will not be.

That is, the second bolt body member 200 is positioned in a state in which the connection body portion 220 is inserted into the bolt insertion portion 110 and is engaged with the first bolt body member 100 to be idle, Thus, the bolt connection member 300 is connected to the first bolt body member 100 and rotates integrally with the first bolt body member 100.

On the other hand, Figure 5 is a cross-sectional view showing another embodiment of the bolt structure 10 having a self-locking structure according to the present invention.

Referring to Figure 5, another embodiment of the bolt structure 10 having a self-locking structure according to the present invention is located in the second bolt body member 200 and the position of the bolt connection member 300 is fixed by magnetic force. It may further include a position fixing magnet member 400.

The position fixing magnet member 400 is located inside the first bolt body member 100 to fix the position of the bolt connection member 300 in the elevating movement space 120.

The magnet part of the dedicated tool has a stronger magnetic force than the magnetic force of the position fixing magnet member 400 so that the bolt connection member 300 can be elevated.

The bolt connection member 300 cannot be raised or lowered with a tool other than a dedicated tool having a greater magnetic force than the position fixing magnet member 400.

In other words, even if the intruder who tries to loosen the bolt with impure intentions knows, it is necessary to use a dedicated tool having a magnetic force greater than that of the position fixing magnet member 400 to lift the bolt connecting member 300 and insert it into the second bolt body member 200. Since the intruder can disassemble it arbitrarily, disassembly and attempts of components that may cause failure can be more reliably prevented.

In addition, the position fixing magnet member 400 serves to smoothly insert the bolt connection member 300 back into the elevating movement space 120 when the dedicated tool is separated.

That is, when the bolt structure 10 according to the present invention is fastened in a horizontal direction or inclined rather than fastened in a vertical direction, the bolt connecting member 300 moves up and down by its own load after the dedicated tool is separated. It may not be able to be inserted into 120.

When the bolt structure 10 according to the present invention is fastened in a horizontal direction or at an inclined direction, the position fixing magnet member 400 pulls the bolt connection member 300 with magnetic force and inserts it into the elevating movement space. The body member 100 and the second bolt body member 200 are separated so that the second bolt body member 200 can be idle.

Accordingly, the position fixing magnet member 400 is preferably located on the lower side of the elevating movement space 120.

6 is an exploded perspective view showing an embodiment of the bolt fastening device according to the present invention, and referring to FIG. 6, the bolt fastening device according to the present invention includes a bolt structure 10 and a magnet part 20a, and a bolt structure It is detachably coupled to (10) and includes a dedicated tool 20 capable of rotating the bolt structure (10).

As an example, the bolt structure 10 is a bolt structure 10 having a structure to prevent loosening by magnetic force mentioned above.

That is, one embodiment of the bolt structure 10 is rotatably coupled to the first bolt body member 100, the first bolt body member 100, the first bolt body member 100, which has a screw thread for fastening on the outer circumferential surface, Including a second bolt body member 200, the first bolt body member 100 and the second bolt body member 200 are integrally rotated by magnetic force, when the magnetic force is removed, the second bolt body member ( 200) is separated from the first bolt body member 100 and rotated separately.

The dedicated tool 20 has a bolt rotation coupling portion 22 that is coupled into the tool coupling portion 200a on the end side.

In addition, as an example, the bolt rotation coupling portion 22 has a cross shape so that it can be inserted into the tool coupling portion 200a, which is a cross-shaped groove portion.

It should be noted that the bolt rotation coupling part 22 may be modified and implemented in various forms corresponding to the shape of the tool coupling part 200a, such as a straight shape or a hexagonal shape.

A magnet part 20a inserted into the magnet insertion part 200b is positioned to protrude below the bolt rotation coupling part 22.

The magnet part 20a may be positioned at the center of the bolt rotation coupling part 22 and inserted into the magnet insertion part 200b located at the center of the tool coupling part 200a.

The dedicated tool 20 may be a manual tool in which the bolt rotation coupling part 22 and the handle part are located on both ends of the rod-shaped tool body, and the bolt rotation coupling part 22 is located on the end side and the bolt rotation It should be noted that it may be a power tool including a motor that rotates the dedicated coupling part 22.

7 is a cross-sectional view showing an example of use of the bolt fastening device according to the present invention, and referring to FIG. 7, a magnet is inserted while coupling the bolt rotation coupling portion 22 of the dedicated tool 20 into the tool coupling portion 200a. When the magnet part 20a is inserted into the part 200b, the bolt connection member 300 located in the elevating movement space 120 is moved upward.

When the bolt connection member 300 moves upward and is inserted into the bolt connection groove 221, when the second bolt body member 200 is rotated with the dedicated tool 20, the first bolt body member 100 becomes the second bolt. It is rotated together with the body member 200.

In addition, when the bolt rotation coupling part 22 of the dedicated tool 20 is separated within the tool coupling part 200a, the bolt connection member 300 descends by its own load and is separated from the bolt connection groove 221.

When the bolt connection member 300 is separated from the bolt connection groove 221, the first bolt body member 100 and the second bolt body member 200 are separated, and the second bolt body member 200 becomes the first bolt body member. Even if the second bolt body member 200 is rotated with a tool other than the dedicated tool 20 by idling separately from the 100, the first bolt body member 100 is not rotated to prevent loosening.

In the present invention, the bolt is prevented from loosening because it can be rotated only with a special jig having a magnet, thereby preventing an accident in which the bolt is loosened due to external shock or vibration.

In addition, the present invention can be rotated only with a dedicated jig having a magnet, so it is impossible to separate it with a general tool other than a dedicated jig, so when the user intends to unfairly change or infringe the technology with impure intention Prevents disassembly and attempts to disassemble components that may cause breakdown.

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention, which is included in the configuration of the present invention.

10: bolt structure 20: dedicated tool
20a: magnet part 22: bolt rotation coupling part
100: first bolt body member 110: bolt insertion portion
111: body passage inlet 111a: first screw thread
112: bolt insertion space 120: elevating movement space
200: second bolt body member 200a: tool coupling portion
200b: magnet insertion part 210: head
220: connection body 220a: second threaded portion
220b: idling part 221: bolt connection groove
300: bolt connection member 400: position fixing magnet member

Claims (17)

A first bolt body member having a screw thread for fastening on the outer circumferential surface; And
And a second bolt body member rotatably coupled to the first bolt body member and capable of being rotated by a tool,
The first bolt body member and the second bolt body member are integrally rotated by magnetic force, and when the magnetic force is removed, the second bolt body member is separated from the first bolt body member and rotated separately,
It is moved by magnetic force to connect the first bolt body member and the second bolt body member to rotate integrally and return to the original position when the magnetic force is released to separate the first bolt body member from the second bolt body member. Further comprising a bolt connection member,
Inside the first bolt body member, a bolt insertion portion opened upward is located, and an elevating movement space in which the bolt connecting member is inserted and positioned so as to move up and down is positioned on the bottom surface of the bolt insertion portion,
The bolt connection member is inserted into the elevating movement space and positioned so that the upper end thereof coincides with the bottom surface of the bolt insertion unit or has a height lower than the bottom surface of the bolt insertion unit,
The second bolt body member includes a head portion having a tool coupling portion positioned on an upper surface thereof; And
It includes a connection body portion protruding from the lower portion of the head portion and inserted into the bolt insertion portion and in which a bolt connection groove portion into which a portion of the upper side of the bolt connection member is inserted is positioned on a lower surface,
The bolt insertion part,
A body passage inlet that is opened so that the connection body portion is passed and inserted into the interior; And
It is located inside the body passage inlet and is divided into a bolt insertion space that is a space having a larger diameter than the body passage inlet,
A first screw thread is located on the inner circumferential surface of the body passage inlet,
The connection body portion is screwed to the first screw thread on the lower outer circumferential surface, and a second screw thread passing through the body passage inlet is positioned, and is located at the body passage inlet on the upper side of the second screw thread so that the connection body portion is idle. Bolt structure having a structure to prevent loosening by magnetic force, characterized in that the idling portion is positioned to enable.
delete The method according to claim 1,
The bolt connection member moves to the upper side by the magnetic force of the tool coupled to the second bolt body member while being inserted into the first bolt body member, while a portion of the lower side is inserted into the first bolt body member. A side portion is coupled to the second bolt body member to connect the first bolt body member and the second bolt body member,
The bolt connection member is a bolt having a structure to prevent loosening by magnetic force, characterized in that the portion inserted into the second bolt body member is separated from the second bolt body member while being lowered and returned to its original position when the magnetic force is released. Structure.
delete delete The method according to claim 1,
A bolt structure having a structure to prevent loosening by magnetic force, characterized in that a magnet insertion part into which the magnet part of the tool can be inserted is positioned in the tool coupling part.
delete The method according to claim 1,
A bolt structure having a structure to prevent loosening by magnetic force, further comprising a position fixing magnet member positioned within the second bolt body member and fixing the position of the bolt connection member by magnetic force.
Bolted structure; And
It includes a dedicated tool that has a magnet part and is detachably coupled to the bolt structure to rotate the bolt structure,
The bolt structure includes a first bolt body member having a screw thread for fastening on an outer peripheral surface thereof; And
A second bolt body member rotatably coupled to the first bolt body member and rotatable by the dedicated tool,
When the first bolt body member and the second bolt body member are integrally rotated by the magnetic force of the magnet portion, and the dedicated tool is separated to remove the magnetic force of the magnet portion, the second bolt body member is the first bolt It is separated from the body member and rotated separately,
It is moved by the magnetic force of the magnet part to connect the first bolt body member and the second bolt body member to rotate integrally, and when the magnetic force is released, the first bolt body member and the second bolt body member are returned to their original position. Further comprising a bolt connection member separating the,
Inside the first bolt body member, a bolt insertion portion opened upward is located, and an elevating movement space in which the bolt connecting member is inserted and positioned so as to move up and down is positioned on the bottom surface of the bolt insertion portion,
The bolt connection member is inserted into the elevating movement space and positioned so that the upper end thereof coincides with the bottom surface of the bolt insertion unit or has a height lower than the bottom surface of the bolt insertion unit,
The second bolt body member includes a head portion having a tool coupling portion positioned on an upper surface thereof; And
It includes a connection body portion protruding from the lower portion of the head portion and inserted into the bolt insertion portion and in which a bolt connection groove portion into which a portion of the upper side of the bolt connection member is inserted is positioned on a lower surface,
The bolt insertion part,
A body passage inlet that is opened so that the connection body portion is passed and inserted into the interior; And
It is located inside the body passage inlet and is divided into a bolt insertion space that is a space having a larger diameter than the body passage inlet,
A first screw thread is located on the inner circumferential surface of the body passage entrance,
The connection body portion is screwed to the first screw thread on the lower outer circumferential surface, and a second screw thread passing through the body passage inlet is positioned, and is located at the body passage inlet on the upper side of the second screw thread, so that the connection body portion is idle. Bolt fastening device, characterized in that the idling portion to be positioned.
delete The method of claim 9,
The bolt connection member moves to the upper side by the magnetic force of the tool coupled to the second bolt body member while being inserted into the first bolt body member, while a portion of the lower side is inserted into the first bolt body member. A side portion is coupled to the second bolt body member to connect the first bolt body member and the second bolt body member,
The bolt fastening device, characterized in that the bolt connection member descends when the magnetic force is released and is separated and returns to its original position, so that a portion inserted into the second bolt body member is separated from the second bolt body member.
delete delete The method of claim 9,
The bolt fastening device, characterized in that the magnet insertion portion into which the magnet portion of the tool can be inserted into the tool coupling portion.
delete The method of claim 9,
A bolt fastening device, further comprising a position fixing magnet member positioned in the second bolt body member and fixing the position of the bolt connection member by magnetic force.
The method of claim 16,
The bolt fastening device, characterized in that the magnet portion of the dedicated tool has a magnetic force stronger than that of the position fixing magnet member.

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