JP2694128B2 - Nut device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nut device in which a screw portion such as a bolt or a screw is screwed into a screw hole thereof, and more particularly to a nut device capable of improving safety.

[0002]

2. Description of the Related Art In recent years, as a nut device which is fitted on a bolt and fastens two components, a nut device for loosening the bolt has been developed.

FIG. 15 is an exploded perspective view showing such a conventional nut device before being assembled.

In FIG. 15, a nut device 80 comprises a nut body 81 and a locking ring 91 attached to the nut body 81.

The nut body 81 is made of a member such as an aluminum alloy, and has a depth deeper than the thickness of the loosening ring 91, and the recessed portion 8 into which the loosening ring 91 is inserted and arranged.
2 is formed on one end side (head). Further, the nut body 81 is provided with a screw hole 8 from the bottom of the recess 82 toward the other end.
3 is formed.

The loosening ring 91 is made of a material such as nylon that is more deformable and elastic than the nut body 81 and has a disk shape, and a through hole 92 is formed in the center thereof. In this case, the inner diameter of the through hole 92 is the screw hole 83.
Is smaller than the root diameter of and is larger than the inner diameter of the screw hole 83. On the outer periphery of the one end side of the nut body 81, a taper portion 84 that tapers toward the one end side is formed. The cross section of the outer periphery 85 on the other end side of the nut body 81 is formed in a hexagon.

FIG. 16 is a sectional view showing a state after the nut device 80 of FIG. 15 is assembled.

In FIG. 16, the recess 8 of the nut body 81 is shown.
A loosening ring 91 is inserted in 2.

The tapered portion 84 of the nut body 81 has its tip deformed inward by plastic deformation using a pressing device or the like to form a locking portion 86, and the inner diameter on one end side of the recess 82 is a retaining ring 91. It is smaller than the outer diameter of.

FIG. 17 shows the nut device 80 of FIG.
It is a sectional view showing tightening of two parts.

In FIG. 17, through holes 113 and 114 are formed in the plate-shaped first and second parts 111 and 112, respectively. The screw portion 122 of the bolt 121 has the through hole 11
3, 114, screwed into the screw hole 83 of the nut body 81 and screwed together, the inside of the through hole 92 of the locking ring 91 is elastically deformed and screwed into this through hole 92, and the tip 123 is It is exposed to the outside of the recess 82. The first and second parts 111 and 112 are sandwiched between the bolt head 124 of the bolt 121 and the nut device 80. In such a state, the bolt 121 and the nut device 80 tighten and fix the first and second parts 111 and 112.

According to such a conventional nut device 80, the threaded portion 122 of the bolt 121 is tightened by the elastic force of the loosening ring 91 attached to the nut body 81, and the space between the loosening ring 91 and the threaded portion 122 is tightened. Since a large static friction force is generated on the bolt 121 and the nut device 80
It is possible to prevent the tightening due to loosening. However, in such a nut device, the length under the neck of the bolt 121 (the length of the threaded portion 122 in FIG. 17) is a thickness obtained by overlapping the first and second parts 111 and 112 with the nut device 80. If the length is longer than this, the tip 123 of the threaded portion 122 of the bolt 121 projects outward. The outer periphery of the tip 123 was sharpened by the thread, and when the tip 123 was rubbed with human skin, there were many cases where a cut was made.

[0013]

According to such a conventional nut device, the length under the neck of the bolt is greater than the thickness of the nut device and the component sandwiched between the bolt head and the nut device. When the length is long, the tip of the threaded portion of the bolt is projected outward, and in such a state, when the tip of the threaded portion is rubbed with human skin, a cut is often made.

Therefore, an object of the present invention is to provide a nut device capable of covering the outer circumference of the tip of the threaded portion protruding from the nut body when the threaded portion is screwed into the threaded hole of the nut body.

[0015]

A nut device according to the present invention as set forth in claim 1 is formed by a nut main body having a concave portion communicating with a screw hole formed in a head and an elastic member, and the concave portion of the nut main body. Is formed on the inner side of the nut body for loosening the screw portion and a member that is more easily deformed than the nut body, and is arranged on the front side of the concave portion of the nut body, When the screw is screwed into the screw hole of the nut body, the cover that covers the tip of the screw part by plastically deforming by the tip of the screw part protruding from the screw hole And a locking portion that locks the cover.

According to a second aspect of the present invention, there is provided a nut device, which comprises a nut main body having a recessed portion communicating with a screw hole formed in a head portion and an elastic member, and is disposed on the inner side of the recessed portion of the nut main body. And a loosening ring to loosen the screw part and a member that is more easily deformed than the nut body,
A through hole smaller than the inner diameter of the screw hole of the nut body is formed, and the through hole is provided on the front side of the concave portion of the nut body, and the screw portion is screwed into the screw hole of the nut body. A cover that plastically deforms by the tip of the threaded portion protruding from the end and covers the outer periphery of the tip of the threaded portion, and a lock that is formed on the front side of the cover of the recess of the nut body and that locks the cover. And a section.

According to a third aspect of the present invention, there is provided a nut device, which comprises a nut main body having a recess formed in the head portion, which communicates with a screw hole, and a member which has elasticity and is more easily deformed than the nut main body. A locking cover which is disposed in the recess of the main body and plastically deforms when the screw part is screwed into the screw hole of the nut body by the tip of the screw part protruding from the screw hole to cover the tip of the screw part. And a locking portion which is formed on the front side of the recess of the nut body with respect to the locking cover and locks the locking cover.

According to a fourth aspect of the present invention, there is provided a nut device, which comprises a nut main body having a recess formed in a head portion thereof and communicating with a screw hole, and a member having elasticity and being more easily deformed than the nut main body. A through hole that is smaller than the inner diameter of the screw hole of the main body is formed, and the through hole is provided in the recess of the nut main body, and when the screw portion is screwed into the screw hole of the nut main body, the screw portion that protrudes from the screw hole. A locking cover that plastically deforms by the tip of the screw to cover the outer periphery of the tip of the threaded portion, and a lock that is formed in the concave portion of the nut body on the front side of the locking cover and locks the locking cover. And a section.

According to a fifth aspect of the present invention, there is provided a nut device, which comprises a nut main body having a head having a first recess communicating with a screw hole, and a member having elasticity and being more easily deformed than the nut main body. , The second to loosen the screw part
Is formed in the first recess of the nut body with the second recess facing the screw hole side of the nut body, and the screw part is screwed into the screw hole of the nut body. When the fitting is formed, the loosening cover that plastically deforms by the tip of the threaded portion protruding from the screw hole to cover the tip of this threaded portion, and the recessed portion of the nut body is formed on the front side of the loosening cover, And a locking portion that locks the locking cover.

According to a sixth aspect of the present invention, there is provided a nut device, which comprises a nut main body having a head having a first recess communicating with a screw hole, and an elastic member which is more easily deformable than the nut main body. A through hole smaller than the inner diameter of the screw hole of the nut body is formed, and a second recess for communicating with the through hole to prevent the screw part from loosening is formed. It is disposed in the first recess of the nut body in a state of facing the hole side, and when the screw part is screwed into the screw hole of the nut body, plastic deformation is caused by the tip of the screw part protruding from the screw hole. And a locking portion that covers the outer periphery of the tip of the threaded portion, and a locking portion that is formed in the concave portion of the nut body on the front side of the locking cover and that locks the locking cover. It is characterized by

[0021]

According to the structure of the present invention, when the threaded portion is screwed into the threaded hole of the nut body, the cover is plastically deformed by the tip of the threaded portion protruding from the threaded hole, and the cover of the threaded portion is Since the tip is covered, when the screw portion is screwed into the screw hole of the nut body, the outer periphery of the tip of the screw portion protruding from the nut body can be covered.

According to the structure of claim 2, the cover is
When the threaded portion is screwed into the threaded hole of the nut body, the tip of the threaded portion protruding from the threaded portion plastically deforms to cover the outer periphery of the tip of the threaded portion, so When screwed, the outer periphery of the tip of the threaded portion protruding from the nut body can be covered.

According to the third aspect of the present invention, the locking cover is plastically deformed by the tip of the threaded portion projecting from the threaded portion when the threaded portion is screwed into the threaded hole of the nut main body, and the screw is formed. Since the tip of the threaded portion is covered, the outer circumference of the tip of the threaded portion protruding from the nut body can be covered when the threaded portion is screwed into the threaded hole of the nut body.

According to the structure of the fourth aspect, when the screw portion is screwed into the screw hole of the nut body, the loosening cover is plastically deformed by the tip of the screw portion protruding from the screw hole, and the screw is Since the tip of the threaded portion is covered, the outer circumference of the tip of the threaded portion protruding from the nut body can be covered when the threaded portion is screwed into the threaded hole of the nut body.

According to a fifth aspect of the present invention, the locking cover is plastically deformed by the tip of the threaded portion protruding from the threaded portion when the threaded portion is screwed into the threaded hole of the nut body, and the screw Since the tip of the threaded portion is covered, the outer circumference of the tip of the threaded portion protruding from the nut body can be covered when the threaded portion is screwed into the threaded hole of the nut body.

According to a sixth aspect of the present invention, the loosening cover is plastically deformed by the tip of the threaded portion protruding from the threaded portion when the threaded portion is screwed into the threaded hole of the nut body, and the screw is screwed. Since the tip of the threaded portion is covered, the outer circumference of the tip of the threaded portion protruding from the nut body can be covered when the threaded portion is screwed into the threaded hole of the nut body.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given below with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of a nut device according to the present invention.

In FIG. 1, the nut device 10 comprises a nut body 11 of a hexagonal nut, a locking ring 21 attached to the nut body 11 and a cover 25.

The nut body 11 is made of a member such as an aluminum alloy and has a depth of the locking ring 21 and the cover 2.
A concave portion 12 is formed at one end side (head portion) deeper than the thickness in which 5 and 5 are overlapped and the cover 25 is on the front side and the locking ring 21 is on the back side and is stacked and inserted. In addition, the nut body 11 extends from the bottom of the recess 12 toward the other end,
A screw hole 13 is formed in communication with the recess 12.

The loosening ring 21 is for loosening the threaded portion, which will be described later. It is made of a material such as nylon that is more easily deformable and elastic than the nut body 11 and has a disk shape. Is formed. In this case, the inner diameter of the through hole 22 is smaller than the root diameter of the screw hole 13 and larger than the inner diameter of the screw hole 13.

The cover 25 is a nut body 1 made of nylon or the like.
1 is a disk-shaped member that is more easily deformed.

The outer diameters of the locking ring 21 and the cover 25 are substantially the same.

Further, on the outer periphery of the one end side of the nut body 11, there is formed a taper portion 14 which is tapered toward the one end side. The tapered portion 14 of the nut body 11 is formed with a locking portion 16 that locks the cover 25 by deforming the tip toward the inside by plastic deformation using a press device or the like. As a result, the inner diameter of the recess 12 on the one end side is smaller than the outer shapes of the locking ring 21 and the cover 25. This prevents the loosening ring 21 and the cover 25 from falling off the recess 12. Nut body 11
A countersink 17 is formed around the other end of the screw hole 13 for facilitating the screwing of a later-described screw portion.

FIG. 2 is an exploded perspective view showing the nut device 10 of FIG. 1 before being assembled.

The cross section of the outer periphery 15 on the other end side of the nut body 11 is formed in a hexagonal shape. The taper portion 14 of the nut body 11 is in a state before it is plastically deformed, and the inner diameter of the recess 12 is from the one end side to the other end side.
1 and the outer diameter of the cover 25 have almost the same diameter.

3A and 3B are explanatory views showing the manufacturing process of the nut device 10 of FIG. 1. FIG. 3A shows the state of only the nut body 11, and FIG. 21 shows a state in which 21 and the cover 25 are inserted.

As shown in FIG. 3A, the nut body 11
In this state, the recess 12 has the same inner diameter from one end side to the other end side. After that, as shown in FIG. 3B, the locking ring 21 and the cover 25 are inserted. After that, the tapered portion 14 of the nut body 11 is deformed with its tip facing inward by plastic deformation using a pressing device or the like. As a result, the nut device 10 is brought into the state shown in FIG.

FIG. 4 is a sectional view showing the tightening of two parts by the nut device 10 of FIG.

In FIG. 4, through holes 33, 34 are formed in the plate-shaped first and second parts 31, 32.
The screw portion 36 of the bolt 35 is inserted into the through holes 33 and 34, screwed into the screw hole 13 of the nut body 11 and screwed together, and the inner side of the through hole 22 of the locking ring 21 is plastically and elastically deformed. The cover 37 is screwed in and its tip 37 projects from the through hole 22 of the locking ring 21, but the cover 25 plastically deforms in the direction in which the threaded portion 36 projects to cover the tip 37 of the threaded portion 36.

Bolt head 38 of bolt 35 and nut device 1
The first and second parts 31 and 32 are sandwiched between 0 and 0. In this state, the bolt 35 and the nut device 10
Tightens and fixes the first and second parts 31 and 32.

According to such an embodiment, the nut body 1
When the threaded portion 36 is screwed into the threaded hole 13 of No. 1, the outer periphery of the tip 37 of the threaded portion 36 protruding from the nut body 11 can be covered with the cover 25. It is possible to prevent cuts from being made on human skin around the outer periphery of the tip end 37 of the portion 36, and it is possible to enhance the safety of equipment using such a nut device.

FIG. 5 is a sectional view showing another embodiment of the nut device according to the present invention. The same components as those of the embodiment of FIG.

In FIG. 5, the nut device 40 of this embodiment is shown.
Uses a cover 41 instead of the cover 25 of FIG. The cover 41 is formed of the same member as the cover 25 of FIG. 1, and has the same outer diameter as the locking ring 21. In the cover 41, a through hole 42 having a smaller inner diameter than the through hole 22 of the locking ring 21 and smaller than the inner diameter of the screw hole 13 is formed at the center. In this case, the inner diameter of the through hole 42 is set according to the amount of protrusion of the later-described loosening prevention ring 21 of the threaded portion from the through hole 22.

FIG. 6 is a sectional view showing the tightening of two parts by the nut device 40 of FIG.

In FIG. 6, the threaded portion 36 of the bolt 35 is shown.
Is the through holes 33, 34 of the first and second parts 31, 32.
Inserted into the screw hole 13 of the nut body 11 and screwed together, and the inner side of the through hole 22 of the locking ring 21 is plastically and elastically deformed and screwed into the through hole 2 of the locking ring 21.
2, the inner diameter of the through hole 42 is set so as not to be larger than the root diameter of the threaded portion 36 even when deformed, so that the threaded portion 36 is screwed into the through hole 42 of the cover 41. Instead, the cover 41 plastically deforms in the protruding direction of the threaded portion 36 to cover the outer periphery of the tip 37 of the threaded portion 36. Accordingly, when the screw portion 36 is screwed into the screw hole 13 of the nut body 11, the screw portion 3 protruding from the nut body 11
The outer periphery of the tip end 37 of 6 can be covered with a cover 41.

According to such an embodiment, the same effect as that of the embodiment of FIG. 1 can be obtained, and the air between the screw portion 36 and the cover 41 can be easily discharged by the through hole 42 of the cover 41. The threaded portion 36 can be easily screwed. In addition to this, when the cover 41 is deformed, the through hole 42 expands, so that the cover 41 can be prevented from cracking.

FIG. 7 is a sectional view showing another embodiment of the nut device according to the present invention. The same components as those of the embodiment of FIG. .

In FIG. 7, the nut device 50 of the present embodiment.
Then, one loosening cover 51 is used instead of the overlapping of the loosening ring 21 and the cover 25 in FIG.

The loosening cover 51 is made of a deformable and elastic member such as nylon in the shape of a disk, is more easily deformed than the nut body 11, and has a thickness and outer diameter shown in FIG. It is the same as a combination of the ring 21 and the cover 25.

FIG. 8 is a sectional view showing the tightening of two parts by the nut device 50 of FIG.

In FIG. 8, the threaded portion 36 of the bolt 35 is shown.
Is the through holes 33, 34 of the first and second parts 31, 32.
Is inserted into the screw hole 13 of the nut body 11 and screwed into the nut body 11, and the loosening cover 51 is screwed by plastically and elastically deforming the surface, but the loosening cover 51 projects from the threaded portion 36. Plastically deforms in the direction to cover the screw portion 36. Accordingly, when the screw portion 36 is screwed into the screw hole 13 of the nut body 11, the screw portion 36 protruding from the nut body 11
The outer periphery of the tip 37 of the can be covered with the loosening cover 51.

According to such an embodiment, the same effect as that of the embodiment of FIG. 1 can be obtained, and since the structure is simpler than that of the embodiment of FIG. 1, the manufacturing cost is reduced as compared with the embodiment of FIG. be able to.

FIG. 9 is a sectional view showing still another embodiment of the nut device according to the present invention. The same components as those of the embodiment of FIG. 7 are designated by the same reference numerals and the description thereof will be omitted. There is.

In FIG. 9, the nut device 55 of this embodiment is used.
Instead of the loosening cover 51 of FIG.
6 is used. The loosening cover 56 is formed of the same member as the loosening cover 51 of FIG. 7, and has an outer diameter at the center which is the same as that of the loosening cover 51 of FIG. 7. The loosening cover 56 has a through hole 57 smaller than the inner diameter of the screw hole 13.
Are formed. In this case, the inner diameter of the through hole 57 is set according to the amount of protrusion of the threaded portion described below from the threaded hole 13.

FIG. 10 is a sectional view showing the tightening of two parts by the nut device 55 of FIG.

In FIG. 10, the threaded portion 36 of the bolt 35 is shown.
Is the through holes 33, 34 of the first and second parts 31, 32.
Is inserted into the screw hole 13 of the nut body 11 and screwed into the nut body 11, and the loosening cover 56 is screwed by plastically and elastically deforming the surface, but the inner diameter of the through hole 57 is Since it is set so as not to be larger than the root diameter of the threaded portion 36, the threaded portion 36 does not screw into the through hole 57 of the loosening cover 56, and the loosening cover 56 projects in the direction in which the threaded portion 36 projects. It is plastically deformed to cover the outer periphery of the tip 37 of the threaded portion 36.

According to such an embodiment, the same effect as that of the embodiment of FIG. 7 is obtained, and the through hole 57 of the loosening cover 56 facilitates the air between the screw portion 36 and the loosening cover 56. Since it can flow out, the threaded portion 36 can be easily screwed. In addition to this, since the through hole 57 expands when the loosening cover 56 is deformed, it is possible to prevent the loosening cover 56 from cracking.

FIG. 11 is a sectional view showing still another embodiment of the nut device according to the present invention.
The same components as those in the embodiment are given the same reference numerals and the description thereof is omitted.

In FIG. 11, the nut device 6 of this embodiment
0, a loosening cover 61 is used instead of the loosening cover 51 in FIG. 7.

The loosening cover 61 is made of a deformable and elastic member such as nylon in the shape of a disc and is more easily deformed than the nut body 11, and has a thickness and an outer diameter shown in FIG. It is the same as the cover 51. Further, the locking cover 61 is provided on one end side (screw hole 13
On the side), a concave portion 62 for loosening the screw portion is formed. The inner diameter of the recess 62 is smaller than the root diameter of the screw hole 13 and larger than the inner diameter of the screw hole 13.

FIG. 12 is a view of the nut device 60 of FIG.
It is a sectional view showing tightening of two parts.

In FIG. 12, the threaded portion 36 of the bolt 35 is shown.
Is the through holes 33, 34 of the first and second parts 31, 32.
Is inserted into the screw hole 13 of the nut body 11 and screwed into the screw hole 13 to plastically and elastically deform the inside of the concave portion 62 of the loosening cover 61 to be screwed in. Since the threaded portion 36 is plastically deformed in the protruding direction to cover the threaded portion 36, the outer periphery of the tip end 37 of the threaded portion 36 protruding from the nut body 11 can be coated.

According to such an embodiment, the same effect as that of the embodiment of FIG. 7 is obtained, and since the recess 62 is formed, the locking cover 61 can be easily deformed and the screw portion 36 can be screwed. Can be facilitated.

FIG. 13 is a sectional view showing still another embodiment of the nut device according to the present invention. The same components as those of the embodiment of FIG. 11 are designated by the same reference numerals and the description thereof will be omitted. doing.

In FIG. 13, the nut device 6 of this embodiment is
In FIG. 5, a loosening cover 66 is used instead of the loosening cover 61 of FIG. The loosening cover 66 is a disc-shaped member that is deformable and has elasticity, such as nylon, and is more easily deformed than the nut body 11, and has a thickness and outer diameter that are similar to those of the loosening cover 61 shown in FIG. It's the same. The loosening cover 66 has a recess 67 formed on one end side similar to the recess 62 of FIG. Further, the loosening cover 66 has a through hole 68 that is smaller than the inner diameter of the screw hole 13 from the center of the bottom of the recess 67 toward the other end. The inner diameter of the through hole 68 in this case is set according to the amount of protrusion of the threaded portion from the through hole 13 described below.

FIG. 14 is a view of the nut device 65 of FIG.
It is a sectional view showing tightening of two parts.

In FIG. 14, the screw portion 36 of the bolt 35 is shown.
Is the through holes 33, 34 of the first and second parts 31, 32.
Inserted into the screw hole 13 of the nut body 11 and screwed together, and the inner side of the recess 67 of the loosening cover 66 is plastically and elastically deformed and screwed, but the inner diameter of the through hole 68 is In this case, since the root diameter of the threaded portion 36 is set to be not larger than the root diameter of the threaded portion 36, the threaded portion 36 is attached to the locking cover 6
6 is not screwed into the through hole 68, but the loosening cover 66 is plastically deformed in the protruding direction of the threaded portion 36, and the tip 3 of the threaded portion 36 is deformed.
The outer circumference of 7 is covered.

According to this embodiment, the same effect as that of the embodiment of FIG. 11 is obtained, and the locking cover 66 is provided.
Since the air between the screw portion 36 and the loosening cover 66 can easily flow out through the through hole 68, the screw portion 36 can be easily screwed. In addition to this, the locking cover 66
Since the through hole 68 expands when the deformation is caused, it is possible to prevent the loosening cover 56 from being cracked.

Although the present invention is applied to the nut device in which the screw portion of the bolt is screwed in the embodiment shown in FIGS. 1 to 14, other parts, for example, a nut in which the screw portion of the screw is screwed, are applied. It may be applied to the device. 1 to FIG.
Although the nut device of the present invention is applied to the hexagonal nut in the embodiment shown in Fig. 5, it may be applied to another nut device such as a square nut.

[0071]

As described above, according to the first aspect of the invention, when the screw portion is screwed into the screw hole of the nut body, the outer periphery of the tip of the screw portion protruding from the nut body is covered. As a result, it is possible to prevent the tip of the threaded portion from making a cut on human skin, and it is possible to enhance the safety of the device using such a nut device.

As described above, according to the second aspect of the invention, when the screw portion is screwed into the screw hole of the nut body, the outer periphery of the tip of the screw portion protruding from the nut body can be covered. Therefore, it is possible to prevent human skin from being cut at the tip of the screw part, and it is possible to enhance the safety of equipment using such a nut device, and the through hole of the cover allows for a gap between the screw part and the cover. Air can be easily discharged, the screw portion can be easily screwed in, and the cover can be prevented from cracking by expanding the through hole when the cover is deformed.

As described above, according to the third aspect of the invention, when the screw portion is screwed into the screw hole of the nut body, the outer periphery of the tip of the screw portion protruding from the nut body can be covered. Therefore, it is possible to prevent the tip of the screw portion from making a cut on human skin, and it is possible to enhance the safety of the device using such a nut device.

As described above, according to the invention of claim 4, when the screw portion is screwed into the screw hole of the nut body, the outer periphery of the tip of the screw portion protruding from the nut body can be covered. Therefore, it is possible to prevent human skin from being injured by the tip of the screw part, and it is possible to enhance the safety of equipment using such a nut device, and also to prevent the screw part and the loosening stop by the through hole of the loosening cover. The air between the covers can easily flow out, the screw part can be easily screwed in, and the through hole expands when the locking cover is deformed, so that the locking cover can be prevented from cracking. it can.

As described above, according to the invention of claim 5, when the screw portion is screwed into the screw hole of the nut body, the outer periphery of the tip of the screw portion protruding from the nut body can be covered. Therefore, it is possible to prevent the tip of the screw portion from making a cut on human skin, and it is possible to enhance the safety of the device using such a nut device.

As described above, according to the invention of claim 6, when the screw portion is screwed into the screw hole of the nut body, the outer periphery of the tip of the screw portion protruding from the nut body can be covered. Therefore, it is possible to prevent human skin from being injured by the tip of the screw part, and it is possible to enhance the safety of equipment using such a nut device, and also to prevent the screw part and the loosening stop by the through hole of the loosening cover. The air between the covers can easily flow out, the screw part can be easily screwed in, and the through hole expands when the locking cover is deformed, so that the locking cover can be prevented from cracking. it can.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a nut device according to the present invention.

FIG. 2 is an exploded perspective view of the nut device 10 of FIG.

FIG. 3 is an explanatory view showing a manufacturing process of the nut device of FIG. 1.

4 is a cross-sectional view showing tightening of two parts by the nut device of FIG.

FIG. 5 is a cross-sectional view showing another embodiment of the nut device according to the present invention.

FIG. 6 is a cross-sectional view showing tightening of two parts by the nut device of FIG.

FIG. 7 is a sectional view showing another embodiment of the nut device according to the present invention.

FIG. 8 is a cross-sectional view showing tightening of two parts by the nut device of FIG.

FIG. 9 is a sectional view showing still another embodiment of the nut device according to the present invention.

FIG. 10 is a cross-sectional view showing tightening of two parts by the nut device of FIG.

FIG. 11 is a sectional view showing still another embodiment of the nut device according to the present invention.

12 is a cross-sectional view showing tightening of two parts by the nut device of FIG.

FIG. 13 is a sectional view showing still another embodiment of the nut device according to the present invention.

14 is a cross-sectional view showing tightening of two parts by the nut device of FIG.

FIG. 15 is an exploded perspective view showing a state before the conventional nut device is assembled.

16 is a sectional view showing a state after the nut device of FIG. 15 is assembled.

FIG. 17 is a cross-sectional view showing tightening of two parts by the nut device of FIG.

[Explanation of symbols]

 10 Nut Device 11 Nut Main Body 12 Recess 13 Screw Hole 16 Locking Part 21 Loose Lock Ring 22 Through Hole 25 Cover

Claims (6)

(57) [Claims] 1. A nut main body having a concave portion communicating with a screw hole formed in its head and an elastic member, which is disposed on the inner side of the concave portion of the nut main body to loosen the screw portion. A retaining ring and a member that is more easily deformed than the nut body, and is provided on the front side of the concave portion of the nut body, and when the screw portion is screwed into the screw hole of the nut body, A cover that plastically deforms by the protruding tip of the threaded portion to cover the tip of this threaded portion, and a locking portion that is formed on the front side of the recess of the nut body in front of the cover and that locks the cover. A nut device characterized by being provided. 2. A nut main body having a concave portion communicating with a screw hole formed in a head portion and an elastic member, which is arranged on the inner side of the concave portion of the nut main body to loosen the screw portion. A stop ring and a member that is more easily deformed than the nut body, and a through hole that is smaller than the inner diameter of the screw hole of the nut body is formed. A cover that covers the outer periphery of the tip of the threaded portion by plastically deforming when the threaded portion is screwed into the threaded hole of the nut body, and plastically deforms by the tip of the threaded portion protruding from the threaded hole; A nut device, characterized in that the nut device is formed on the front side of the cover and has a locking portion for locking the cover. 3. A nut main body having a recess formed in the head portion, the recess communicating with a screw hole, and a member having elasticity and being more easily deformed than the nut main body. When the threaded portion is screwed into the threaded hole of the nut body, the loosening cover that plastically deforms by the tip of the threaded portion protruding from the threaded hole to cover the tip of this threaded portion, and the loosened portion of the recessed portion of the nut body. A nut device, characterized in that the nut device is formed on the front side of the stop cover and has a locking portion for locking the loosening cover. 4. A nut main body having a recess formed in the head for communicating with a screw hole, and a penetrating member having elasticity and being more easily deformed than the nut main body, and having a penetration smaller than the inner diameter of the screw hole of the nut main body. A hole is formed and is disposed in the recess of the nut body, and when the threaded portion is screwed into the threaded hole of the nut body, the threaded portion is plastically deformed by the tip of the threaded portion protruding from the threaded hole. And a locking portion that covers the outer periphery of the tip of the nut and a locking portion that is formed in the concave portion of the nut body in front of the locking cover and that locks the locking cover. Nut device. 5. A nut main body formed with a first recess communicating with a screw hole in the head, and a member having elasticity and more easily deformed than the nut main body to prevent loosening of the screw part. Is formed in the first recess of the nut body with the second recess facing the screw hole side of the nut body, and the screw part is screwed into the screw hole of the nut body. When fitted, a loosening cover that plastically deforms by the tip of the threaded portion protruding from the screw hole to cover the tip of the threaded portion, and is formed on the recess body of the nut body on the front side of the loosening cover, A nut device, comprising: a locking portion that locks the locking cover. 6. A nut main body having a head portion formed with a first recess communicating with the screw hole, and a member which has elasticity and is more easily deformed than the nut main body, and is formed from an inner diameter of the screw hole of the nut main body. A small through-hole is formed, and a second recess for communicating with the through-hole to loosen the screw portion is formed, and the nut main body with the second recess facing the screw hole side of the nut main body. Of the threaded portion of the nut body when the threaded portion is screwed into the threaded hole of the nut body, and is plastically deformed by the tip of the threaded portion projecting from the threaded hole so that the outer circumference of the tip of the threaded portion is A nut device, comprising: a loosening cover that covers; and a locking portion that is formed in a concave portion of the nut body on the front side of the loosening cover and that locks the loosening cover.