JP5923150B2 - Rock bolt - Google Patents

Description

The present invention relates to a fastener, and more particularly to a lock bolt.

  The bolt is screwed with the nut to form a fastening unit. Thereby, it is possible to fix a to-be-fixed object. There are numerous cases where fastening units can be used. In places where fastening units are used, bolts and nuts are often loosened unexpectedly when subjected to dynamic loads or vibrations. In particular, in a facility (for example, a vehicle, a bridge, or a power plant) that requires strict safety, loosening of the fastening unit is not allowed.

  In order to prevent loosening of bolts and nuts, the applicant of the present application has proposed Taiwan Invention No. 102121375. As shown in FIG. 1, by providing one or more elastic bodies 10 between the bolt 12 and the nut 14, the bolt 12 and the nut 14 have an elastic contact force. In this way, it is possible to prevent loosening of the bolt and nut. However, since the elasticity of the elastic body 10 is constant, the bolt 12 is pressed against the constant elasticity of the elastic body 10 to prevent the bolt and nut from loosening. In other words, the bolt 12 prevents the bolt and the nut from loosening only by pressing the elastic body 10 with a certain elasticity, but according to such a method, the effect of preventing the loosening is insufficient.

  Further, the degree of bolt loosening prevention required for different facilities is different. The above-mentioned conventional one has a problem that the degree of bolt locking cannot be adjusted when dealing with different cases.

A main object of the present invention is to provide a lock bolt capable of preventing loosening of a bolt by using an active locking means.

Another object of the present invention is to provide a lock bolt that can adjust the locking effect of the bolt and can cope with various types of fixed objects and fastening conditions.

According to the lock bolt of the present invention, the head portion has a screw shaft, the screw shaft is connected to the head portion at the upper end, and a bolt provided with a thread on its peripheral surface,
A passage provided in the bolt, having at least one open end and located at one end of the bolt;
Provided on the circumferential surface of the screw shaft of the bolt, and at least one accommodation space communicating with the passage;
At least one locking tool disposed in the housing space and capable of being displaced along the radial direction of the screw shaft;
A pressing tool arranged in the passage and capable of being displaced in the passage;
Including
When the pressing tool is displaced, the locking tool can be pressed directly or indirectly, whereby the locking tool moves to the peripheral surface of the screw shaft.

According to the lock bolt of the present invention, the locking tool has a contact part, the contact part is inserted into the passage, and the pressing tool can press the contact part of the locking tool. And

According to the lock bolt of the present invention, each accommodation space has a communication hole, the communication hole communicates the accommodation space and the passage, and the contact portion of the locking tool is inserted into the passage through the communication hole, The pressing tool has at least one touch part, presses the contact part of the locking tool by the touch part, and makes contact between the touch part and the contact part in the form of a conical surface, an arc surface, or an inclined surface. It is characterized by.

According to the lock bolt of the present invention, the locking tool further includes a body portion, the contact portion is connected to the body portion, and the body portion is located in the accommodation space.

According to the lock bolt of the present invention, the body portion of the locking tool has a long configuration, and its longitudinal direction is parallel to the longitudinal direction of the bolt.

According to the lock bolt of the present invention, each accommodation space is a through hole, one end communicates with the passage, the other end communicates with the peripheral surface of the screw shaft, and the locking tool has a pin shape, and its back end Is a contact part, each pressing tool has at least one touch part, presses the contact part of the locking tool by the touch part, a conical surface, a slope, a spherical surface between the touch part and the contact part Or contact in the form of a circular arc surface.

According to the lock bolt of the present invention, the screw shaft has two or more accommodating spaces, and the two or two or more locking tools are respectively arranged in these accommodating spaces. And

According to the lock bolt of the present invention, these accommodating spaces are located at different heights in the vertical direction of the bolt, the pressing tool has two or more touch parts, and these touch parts are these It corresponds to the contact part of each locking tool.

According to the lock bolt of the present invention, these accommodating spaces are located at the same height in the vertical direction of the bolt and are arranged on the same circumference on the screw shaft, and the contact portions of these locking tools are pressed against each other. It corresponds to the same touch part of a tool.

According to the lock bolt of the present invention, at least one communication hole is provided in the screw shaft, and the accommodation space and the passage communicate with each other.
In addition, the interlocking tool includes a interlocking tool, and the interlocking tool is slidably disposed in the communication hole. One end of the interlocking tool is inserted into the passage. When the pressing tool displaces the passage, the interlocking tool is driven and the locking tool is inserted. Is displaced to the circumferential surface of the screw shaft.

According to the lock bolt of the present invention, the locking tool has elasticity in the radial direction of the screw shaft.

According to the lock bolt of the present invention, the pressing tool and the interlocking tool are in contact with each other in the form of a conical surface, an inclined surface, an arc surface, or a spherical surface.

According to the lock bolt of the present invention, the passage is a hole provided with a thread, and the pressing tool is a screwing member provided with a thread on its peripheral surface.

According to the lock bolt of the present invention, the nut further includes a nut, the nut has a screw hole having a blind hole shape, is screwed to the free end of the screw shaft, contacts the outer end of the pressing tool, and the nut When the screw is screwed into the bolt, the pressing tool is pressed and displaced.

The lock bolt of the present invention has the following effects.
(1) It is possible to prevent the bolt from loosening by generating a tightening force between the bolt and the screwing device corresponding thereto by using the active type loosening prevention means.

(2) Since it is possible to adjust the magnitude of the tightening force generated between the bolt and the corresponding screwing device, it is possible to adjust the effect of preventing the bolt from loosening. It is possible to cope with objects and fastening conditions.

It is sectional drawing which shows the conventional screwing of a volt | bolt and a nut. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cut perspective view illustrating a bolt according to a first embodiment of the present invention, in which a nut is screwed into the bolt according to the first embodiment. It is sectional drawing which shows the volt | bolt of Example 1 of this invention. It is sectional drawing which shows the state in which the nut is screwed together by the volt | bolt of Example 1 of this invention. It is sectional drawing which shows the state by which the nut of the Example 1 of this invention was screwed together and latched. It is sectional drawing which shows the volt | bolt of Example 2 of this invention. It is sectional drawing which shows the state in which the nut is screwed together by the volt | bolt of Example 2 of this invention. It is sectional drawing which shows the state by which the nut of the Example 2 of this invention was screwed together and latched. It is sectional drawing which shows the volt | bolt of Example 3 of this invention. It is sectional drawing which shows the volt | bolt of Example 4 of this invention. It is sectional drawing which shows the volt | bolt of Example 5 of this invention. It is a figure which shows the use condition of the volt | bolt of Example 5 of this invention. It is sectional drawing which shows the volt | bolt of Example 6 of this invention. It is sectional drawing which shows the volt | bolt of Example 7 of this invention. It is sectional drawing of the 15-15 line in FIG. It is a schematic diagram which shows another Example of the locking tool of this invention. It is sectional drawing which shows the volt | bolt of Example 8 of this invention. It is sectional drawing which shows the volt | bolt of Example 9 of this invention, Comprising: The nut is screwed together by the volt | bolt of a present Example. It is sectional drawing which shows the volt | bolt of Example 10 of this invention, Comprising: The nut is screwed together by the volt | bolt of a present Example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Example 1
Please refer to FIG. 2 and FIG. FIG. 2 is a partially cut perspective view showing the bolt of the first embodiment of the present invention, in which a nut is screwed to the bolt of the present embodiment, and FIG. 3 shows the bolt of the first embodiment of the present invention. It is sectional drawing. The lock bolt of this embodiment includes a bolt 20, a passage 24, at least one accommodation space 26, at least one locking tool 30, and a pressing tool 40.

The bolt 20 has a head portion 21 and a screw shaft 22. The upper end of the screw shaft 22 is connected to the bottom surface of the head portion 21, and a thread is provided on the peripheral surface thereof.

The passage 24 has a linear shape and is provided inside the bolt 20. The passage 24 is located between both ends of the bolt 22 and has at least one open end 25. As shown in FIG. 17, the passage 24 is located on the bottom surface of the screw shaft 22 or the top surface of the head portion 21. In the present embodiment, the passage 24 is provided in the screw shaft 22 along the axial direction of the screw shaft 22. The open end 25 is located on the bottom surface of the screw shaft 22. The channel | path 24 which concerns on an Example is a hole, and the thread | sled 241 is provided in the surrounding surface.

At least one accommodation space 26 is provided on the peripheral surface of the screw shaft 22 of the bolt 20. In the present embodiment, one accommodation space 26 is provided on the screw shaft 22. The accommodation space 26 has a groove shape and has a certain length, and the length is preferably longer than half of the length of the screw shaft 22, but the present invention is not limited thereto. At least one communication hole 28 is provided in the back wall surface of the accommodation space 26 and communicates the accommodation space 26 with the passage 24.

In this embodiment, there is one locking tool 30. The locking tool 30 employs a metal wire or a metal strip, and has a body portion 32 and a contact portion 34. The body portion 32 is refracted to have a U shape, has elasticity, and has a certain length. The contact part 34 is provided at one end of the body part 32. The locking tool 30 is assembled to the bolt 20. The trunk portion 32 is accommodated in the accommodation space 26. The contact portion 34 is inserted into the passage 24 through the communication hole 28. The locking tool 30 can slide in the accommodating space 26 along the radial direction of the bolt 20. The radial direction of the present invention refers to the direction from the inside of the bolt to the circumferential surface of the screw shaft or from the circumferential surface of the screw shaft to the inside of the bolt, and is not limited to the direction perpendicular to the axial direction of the bolt. The longitudinal direction of the body portion 32 is parallel to the longitudinal direction of the bolt 20 and can be compressed in the radial direction of the screw shaft 22.

The pressing tool 40 has a touch portion 42 having a conical shape, is disposed in the passage 24 of the bolt 20, and can be displaced into the passage 24. The pressing tool 40 according to the present embodiment is a fastener (screw), and a thread is provided on the peripheral surface. The touch part 42 has a conical shape and is located at one end (back end) of the pressing tool 40. The pressing tool 40 is screwed into the passage 24 of the bolt 20. When the pressing tool 40 is rotated, the pressing tool 40 can displace the passage 24. The touch part 42 corresponds to the contact part 34 of the locking tool 30. The touch part 42 and the contact part 34 may be contacted in the form of a conical surface, or may be contacted in the form of an arc surface, a spherical surface, or an inclined surface.

Next, the usage state of the present embodiment will be described. As shown in FIGS. 2 and 4, the bolt 20 is screwed into a screw hole or a nut 50 provided at a position to be screwed (not shown), thereby fixing the product 55. It is possible. Before the bolt 20 is used, since the pressing tool 40 does not press the locking tool 30, the body portion 32 of the locking tool 30 is located in the accommodating space 26, and the fastening of the bolt and the nut is performed by the locking tool 30. Not disturbed. When the bolt 20 is screwed into the nut to the required degree of tension, the fastening operation of the bolt and nut is completed. Next, when the pressing tool 40 is rotated so that the pressing tool 40 moves in the pressing direction into the passage 24, that is, when the pressing tool is moved to the back of the bolt, the touch part 42 contacts the locking tool 30. It moves to the part 34 and touches the contact part 34. Since the touch part 42 has a conical shape and has a slope, the touch part 42 moves in the pressing direction together with the locking tool 30. The touch part 42 presses the contact part 34 so that the contact part 34 is separated from the passage 24, and the locking tool 30 moves outward along the radial direction of the screw shaft 22. The body portion 32 moves to the peripheral surface of the screw shaft 22 inside the accommodation space 26 and presses against the wall surface of the screw hole 52 of the nut 50. Since the elastic tightening force of the locking tool 30 exists between the bolt and the nut, the bolt and the nut cannot be easily loosened. In other words, the bolt and the nut cannot be easily loosened due to the elasticity of the body portion 32. The pressing tool of the present embodiment is moved by directly pressing the locking tool.

The pressing force of the locking tool 30 against the nut 50 (the pressing force is also applied to the bolt) can be adjusted by the pressing tool 40. The more the pressing tool 40 presses the abutting portion 34 of the locking tool 30, the more the body portion 32 moves outward, and the pressing force on the nut 50 increases. On the contrary, when the pressing force with respect to the contact part 34 of the pressing tool 40 is decreased, the pressing force with respect to the nut of the locking tool 30 decreases. Thus, it is possible to adjust the tightening force of the locking tool 30 corresponding to each type of object to be fixed, and it is possible to increase the practicality of the bolt 20.

When it is desired to loosen the bolt 20 and the nut 50, if the pressing tool 40 is rotated in the reverse direction, the pressing tool 40 moves in the loosening direction inside the passage 24. That is, the pressing tool 40 moves to the opening end 25 and the pressing force of the touch part 42 against the contact part 34 is lost. At this time, it is possible to loosen the bolt 20 and the nut 50 without the body portion 32 of the pressing tool 40 pressing the nut 50.

In the present embodiment, an active type configuration in which the pressing tool 40 presses the locking tool 30 is employed, so that the bolt and the nut can be pressed against each other to be prevented from loosening. By making it possible to adjust the tightening force of the pressing tool 40 against the locking tool 30, it is possible to change the degree of tightening between the bolt and the nut, and to fix different objects (for example, precision tools, mechanical equipment, bridges, Or a vehicle having a higher safety coefficient and a higher vibration frequency. In this manner, the pressing tool 40 can reliably press the locking tool 30 and increase the tightening force applied to the nut of the trunk portion 32 of the locking tool 30, thereby loosening the bolt and the nut. I can't. Conversely, in the case of a structure with a lower safety factor and a lower vibration frequency, the bolt and nut cannot be loosened even if the pressing force of the pressing tool 40 against the locking tool 30 is smaller. The following embodiments can achieve the same effect.

(Example 2)
Please refer to FIG. 6 to FIG. 6 is a cross-sectional view showing a bolt according to a second embodiment of the present invention, FIG. 7 is a cross-sectional view showing a state in which a nut is screwed to the bolt according to the second embodiment of the present invention, and FIG. It is sectional drawing which shows the state by which the nut of the Example 2 of this Example is screwed together and latched. The bolt 20 according to the present embodiment attaches the same reference numerals to the same components as in the first embodiment. The configuration of the present embodiment is largely the same as that of the first embodiment, and the description of the same parts as those of the first embodiment is omitted.

The trunk | drum 32 of the latching tool 30 exhibits strip shape, and employ | adopts a metal. The contact portion 34 is provided at one end of the body portion 32. When the contact part 34 presses the touch part 42 of the pressing tool 40, the locking tool 30 is displaced to the outside of the accommodation space 26 along the radial direction of the bolt 20. Since the body portion 32 can be bent with respect to the contact portion 34, the body portion 32 has elasticity in the radial direction of the screw shaft 22. After the bolt 20 is screwed into the screw hole or the nut 50 of the screwing site, the touch tool 42 moves in the pressing direction so that the touch part 42 presses the contact part 34 of the lock tool 30 and locks. The body portion 32 of the tool 30 slides outward and elastically presses the wall surface of the screw hole 52 of the nut 50. Due to the locking tool, there is an elastic tightening force between the bolt and the nut, so that the bolt and the nut cannot be loosened. By moving the pressing tool 40 in the release direction that is the reverse direction of the pressing direction, it is possible to eliminate the pressing force of the pressing tool 40 on the locking tool 30.

(Example 3)
Please refer to FIG. FIG. 9 is a cross-sectional view showing a bolt 20 according to a third embodiment of the present invention. The configuration of this embodiment is largely the same as that of the above embodiment, and the description of the same part as that of the above embodiment is omitted.

At least one accommodation space 26 is provided in the screw shaft 22. The two communication holes 28 are separated by a predetermined distance and communicate with the accommodation space 26 and the passage 24.

The at least one locking tool 30 is accommodated in the accommodating space 26, and its trunk 32 has a linear strip shape. The two contact portions 34 are provided on the body portion 32, and are preferably provided on both ends of the body portion 32. The body portion 32 between the two contact portions 34 has flexibility / elasticity.

The pressing tool 40 has two touch portions 42. The two touch portions 42 are provided along the axial direction of the pressing tool 40, but the present invention is not limited to these. For example, one touch part 42 may be provided on the back end of the pressing tool, and the other touch part 42 may be provided on the trunk part of the pressing tool. These touch portions 42 correspond to the two contact portions 34 of the locking tool 30, respectively.

When the pressing tool 40 is moved to the back of the bolt 20, the two touch parts 42 respectively press the two contact parts 34, and the locking tool 30 is displaced to the circumferential surface of the screw shaft 22. In this way, the body portion 32 elastically presses the screwing tool (the screw hole in the screwed portion or the nut screwed to the bolt), thereby elastically pressing between the bolt and the screwing tool. Because of the force, the bolt and screw cannot be loosened. When the pressing tool 40 is moved to the outside of the bolt 20, it is possible to eliminate the tightening force applied to the screwing tool of the locking tool 30.

Example 4
Please refer to FIG. FIG. 10 is a sectional view showing a bolt of Example 4 of the present invention. The configuration of the present embodiment is largely the same as that of the third embodiment, and the description of the same parts as those of the third embodiment is omitted.

The trunk portion 32 of the locking tool 30 has an arc shape and has a slight protruding portion 321. These protruding parts 321 can contact the screwing tool (nut or screw hole in the screwing part) to increase the tightening force of the locking tool against the screwing tool. The system used in this embodiment and the effects thereof are the same as in the above embodiment.

(Example 5)
Please refer to FIG. FIG. 11 is a cross-sectional view showing a bolt 20 'according to a fifth embodiment of the present invention. The bolt 20 ′ includes a head portion 21, a screw shaft 22, a passage 24 provided in the screw shaft 22, at least one accommodation space 26, a locking tool 30 assembled in the accommodation space 26, and a passage. 24, and a pressing tool 40 assembled to 24. The passage 24 is provided with a thread 241 on its peripheral surface and has an open end 25.

The accommodation space 26 is a through hole, and one end communicates with the passage 24 and the other end communicates with the peripheral surface of the screw shaft 22. The locking tool 30 has a pin shape, employs metal, and has a back end that is a contact portion 34 and an outer end that is a locking portion 36. The locking tool 30 is assembled in the accommodation space 26 and can slide. The abutting portion 34 can be inserted into the passage 24.

Next, the usage state of the present embodiment will be described. Please refer to FIG. FIG. 12 is a diagram illustrating a usage state of the bolt of the fifth embodiment of the present invention. As shown in FIG. 12, when the pressing tool 40 is moved in the pressing direction of the passage 24 (that is, to the back of the bolt), the touch part 42 presses the contact part 34 of the locking tool 30, and the locking tool 30 is moved. It is displaced outward along the accommodation space 26. In this manner, the locking portion 36 presses against the wall surface of the screw hole 52 of the nut 50, and the bolt and the nut cannot be loosened. When it is desired to loosen the bolt and nut, the bolt can be loosened by removing the pressing force of the pressing tool 40 against the locking tool 30.

(Example 6)
Please refer to FIG. FIG. 13 is a cross-sectional view showing a bolt 20 according to a sixth embodiment of the present invention. The difference of the present embodiment from the fifth embodiment is as follows.

There are three accommodation spaces 26 according to the present embodiment, and they are arranged at a distance from one end to the other end of the screw shaft 22. The three housing spaces 26 are located at different heights in the axial direction of the screw shaft. The three accommodating spaces 26 are located on the same plane, that is, the three accommodating spaces 26 are located at the same angular position on the circumference of the screw shaft.

There are three locking devices 30 according to the present embodiment, and each is accommodated in the accommodation space 26.

The pressing tool 40 has a long bar shape. The three touch portions 42 are provided on the pressing tool 40 so as to be spaced apart from each other, and correspond to the contact portions 34 of the locking tool 30. One touch part 42 is preferably provided on the back end of the pressing tool 40, and the remaining touch part is preferably provided on the body of the pressing tool.

When the pressing tool 40 is moved in the pressing direction, the three touch portions 42 respectively press the contact portions 34 of the locking tool 30, and the locking tool 30 slides outward to tighten the screwing tool. In this way, the bolt and the screw fastener cannot be loosened.

(Example 7)
Please refer to FIG. 14 and FIG. 14 is a cross-sectional view showing a bolt 20 'according to a seventh embodiment of the present invention, and FIG. 15 is a cross-sectional view taken along line 15-15 in FIG. As in the sixth embodiment, the present embodiment includes a plurality of storage spaces 26 and a plurality of locking tools 30.

These housing spaces 26 are arranged at a distance from one end to the other end of the screw shaft 22 and are not located on the same plane, and therefore are located at different angular positions in the axial direction of the screw shaft. These accommodating spaces 26 are preferably arranged at the same distance from one end to the other end of the screw shaft 22.

Of course, these accommodating spaces 26 may be located at the same height in the vertical direction of the bolt and may be arranged on the same circumference on the screw shaft. In this case, the three locking tools 30 may be located at the same height in the vertical direction of the bolt, and the touch part 42 may have only one. That is, it is possible to simultaneously press the contact portions 34 of the three locking tools 30 with one touch portion 42.

The embodiment shown in FIGS. 11 to 15 may use a locking tool 30 ′ shown in FIG. In the locking tool 30 ′, the locking portion 36 has a substantially conical shape. In this way, the tightening force of the locking tool against the screwing tool is further concentrated, the frictional force between the bolt and the screwing tool is increased, and the loosening prevention effect of the bolt and the screwing tool can be increased. .

The embodiment shown in FIGS. 1 to 10 and FIG. 17 may be provided with a plurality of locking tools as in the embodiment shown in FIGS.

(Example 8)
Refer to FIG. 17 is a sectional view showing a bolt 20 ″ according to an eighth embodiment of the present invention. At least one receiving space 26 is provided in the screw shaft 22. A communication hole 28 allows the passage 24 and the receiving space 26 to communicate with each other. The locking tool 30 is assembled in the accommodation space 26. The pressing tool 40 is assembled in the passage 24.

The bolt 20 ″ further includes an interlocking tool 60. The interlocking tool 60 is, for example, a ball and is slidably disposed in the communication hole 28. The back end of the interlocking tool 60 extends into the passage 24. The touch part 42 of the tool 40 corresponds to the back end of the interlocking tool 60. The back end 322 of the body part 32 of the locking tool 30 contacts the outer end of the interlocking tool 60. The body part 32 has elasticity. Is preferred.

When the pressing tool 40 is moved in the pressing direction, the touch part 42 presses the interlocking tool 60 outward, and the interlocking tool 60 presses the locking tool 30 to the circumferential surface of the screw shaft. Thereby, the trunk | drum 32 of a locking tool presses a screwing tool, and a bolt and a screwing tool cannot loosen. When the pressing tool 40 is moved in the release direction which is the reverse direction of the pressing direction, it is possible to eliminate the tightening force of the locking tool against the screwing tool. The pressing tool according to the present embodiment indirectly presses the locking tool via the interlocking tool.

Example 9
Please refer to FIG. FIG. 18 is a cross-sectional view showing a bolt 20 ″ ″ according to Embodiment 9 of the present invention. The bolt 20 ″ ″ has a head portion 21 and a screw shaft 22. The screw shaft 22 is provided with a passage 24 and at least one accommodation space 26. The two locking tools 30 are assembled in the accommodation space 26. The pressing tool 40 is assembled in the passage 24 and can be displaced along the passage 24. No thread is provided on the wall surface of the passage 24 and the peripheral surface of the pressing tool 40. The nut 55 is screwed to the free end of the screw shaft 22 and has a screw hole 56 that has a blind hole shape. The pressing rod 58 is provided at the closed end of the screw hole 56 and presses against the outer end of the pressing tool 40.

The bolt 20 ″ ″ and the nut 55 are used in special cases or equipment (for example, a vehicle). When the nut 55 is screwed into the bolt 20 ″ ″, the pressing rod 58 causes the pressing tool 40 to pass through the passage 24 due to the displacement of the nut 55. , The pressing tool 40 moves in the pressing direction, the two locking tools 30 move to the outside of the accommodation space 26, and the body 32 of the locking tool 30 is in the screw hole of the screwing site. Tighten the wall. In this way, the bolt 20 '' 'does not loosen.

(Example 10)
Refer to FIG. FIG. 19 is a cross-sectional view showing a bolt 20 ′ ″ according to the tenth embodiment of the present invention. This embodiment uses the same reference numerals as those in the ninth embodiment. The difference between the ninth embodiment and the ninth embodiment is as follows. The outer end of the pressing tool 40 is located outside the passage 24 and is in contact with the wall surface of the closed end of the screw hole 56 of the nut 55. Thus, when the nut 55 is screwed into the bolt 20 ″, the pressing is performed. The tool 40 is pressed to the back of the passage 24 and the two locking tools 30 move to the outside of the accommodation space 26.

The configuration of the embodiment shown in FIGS. 18 and 19 can be applied to any one of the above-described embodiments.

  The present invention can be applied to a lock bolt. It is possible to prevent the bolt from loosening by generating a tightening force between the bolt and the screwing device corresponding to the bolt by using the active locking means. And since it is possible to adjust the magnitude of the tightening force generated between the bolt and the corresponding screwing device, it is possible to adjust the locking effect of the bolt, It is possible to cope with the fastening conditions.

20, 20 ′, 20 ″, 20 ″ ″ Bolt 21 Head portion 22 Screw shaft 24 Passage 241 Thread 25 Open end 26 Housing space 28 Communication hole 30 Locking tool 32 Body portion 321 Projection portion 34 Contact portion 36 Locking portion 40 Pushing tool 42 Touch part 50, 55 Nut 52, 56 Screw hole 58 Pushing rod 60 Interlocking tool

Claims (8)

A bolt having a head portion and a screw shaft, the screw shaft having an upper end connected to the head portion, and a thread provided on a circumferential surface thereof;
A passage provided in the bolt, having at least one open end, and positioned at one end of the bolt;
Provided on a peripheral surface of the screw shaft of the bolt, and at least one accommodation space communicating with the passage;
At least one locking tool disposed in the housing space and capable of being displaced along a radial direction of the screw shaft;
The locking tool has a contact portion, and further has a body portion, the contact portion is connected to the body portion, and the body portion is located in the accommodation space,
The trunk portion of the locking tool has a long configuration, the longitudinal direction thereof is parallel to the longitudinal direction of the bolt, the trunk portion has elasticity in the radial direction of the screw shaft,
A pressing tool disposed in the passage and capable of being displaced in the passage;
Including
The contact portion of the locking tool is inserted into the passage, and the pressing tool can press the contact portion of the locking tool,
Each of the accommodation spaces has a communication hole, the communication hole communicates the accommodation space and the passage, and the contact portion of the locking tool is inserted into the passage through the communication hole, Each pressing tool has at least one touch part, and presses the contact part of the locking tool by the touch part. Between the touch part and the contact part, a conical surface, an arc surface, or an inclined surface Contact in the form of
When the pressing tool is displaced, the locking tool can be pressed directly or indirectly, and thereby the locking tool moves to the circumferential surface of the screw shaft.   The screw shaft has two or two or more receiving spaces, and two or two or more locking tools are respectively arranged in the receiving spaces. Lock bolt described in   These accommodating spaces are located at different heights in the vertical direction of the bolt, the pressing tool has two or two or more touch portions, and the touch portions are the locking portions of the bolts. 3. The lock bolt according to claim 2, wherein the lock bolt corresponds to each of the contact portions of the tool.   These accommodating spaces are located at the same height in the vertical direction of the bolt, and are arranged on the same circumference on the screw shaft, and the abutting portions of the locking tools are arranged on the pressing tool. 3. The lock bolt according to claim 2, wherein the lock bolt corresponds to the same touch part.   An interlocking tool, the interlocking tool is slidably disposed in the communication hole, and one end is inserted into the passage, and the interlocking tool is driven when the pressing tool displaces the passage. The lock bolt according to claim 1, wherein the locking tool is displaced to a peripheral surface of the screw shaft.   6. The lock bolt according to claim 5, wherein the pressing tool and the interlocking tool are in contact with each other in the form of a conical surface, an inclined surface, an arc surface, or a spherical surface.   6. The lock bolt according to claim 1, wherein the passage is a hole in which a thread is provided, and the pressing tool is a screwing member in which a thread is provided on a peripheral surface thereof. .   The nut further includes a screw hole having a blind hole shape, and is screwed to a free end of the screw shaft. The nut contacts the outer end of the pressing tool, and the nut is attached to the bolt. 6. The lock bolt according to claim 1, wherein when the screw is screwed in, the pressing tool is pressed and displaced.