JPH11210736A - Locking member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking member which can reduce construction time and cost without complicated work, and prevent loosening of a screw with certainty. SOLUTION: Items 50 are fastened to each other by screwing a nut 40 onto a male screw 31 of a bolt 30. A locking member 10 is attached to the male screw 31 so as to abut on an upper surface of the nut 40 for preventing loosening of the screw. A female screw 12 screwed onto the male screw 31 is formed on an inner periphery of a substantially circular body 11 which is opened at its side wall to form a C-shaped section. The substantially circular body 11 is made of an elastic material for holding the male screw 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of loosening a screw when a nut such as a plate is fastened by fastening a nut to a male screw such as a bolt when the nut is screwed to the bolt. The present invention relates to a locking member for preventing loosening.

[0002]

2. Description of the Related Art When a nut is screwed onto a bolt or when a fastened part is fastened to another fastened part by the nut, there is a problem that the screw is loosened due to vibration or the like. To prevent this, conventionally, an insertion hole is provided in a nut or a component to be fastened and a bolt to insert a split pin, or a nut that does not loosen once tightened, for example, a nut called a U nut or a fine nut, or I've used double nuts.

[0003]

However, when a split pin is inserted at the present time, the loosening of the screw can be reliably prevented, but there is a problem that the workability is poor. Also, if a nut that does not come loose once tightening is used, it cannot be said that the screw will be loosened securely, and if you want to loosen the screw, it will be difficult to perform the work. It cannot be used, and there is a problem in cost.

On the other hand, when a double nut is used, when the distance from the end of the bolt to the part to be fastened is long, a locking nut is screwed into the end of the bolt, and then the locking nut is moved to the part to be fastened. It was necessary to proceed while rotating a long distance, which was extremely troublesome and left a problem in workability.

[0005] The present invention has been made in view of the above circumstances, and the object thereof is to eliminate the need for any troublesome work, to shorten the construction time and to reduce the cost, and to surely. An object of the present invention is to provide a locking member capable of preventing a screw from loosening.

[0006]

Means adopted by the present invention to solve the above problems will be described with reference to the reference numerals used in the drawings.
When the part 50 is fastened by screwing the nut 40 to the male screw 31 such as 0, the loosening prevention member 10 attached to the male screw 31 so as to abut on the upper surface of the nut 40 to prevent the screw from loosening. In addition, a female screw 12 to be screwed into the male screw 31 is formed on the inner periphery of the annular body 11 having a part of the side wall opened and having a substantially C-shaped cross section, and the annular body 11 encloses the male screw 31. The locking member 10 is formed of an elastic material that urges the holding member.

[0007] The means adopted by the invention of claim 2 is that the annular body 1
1 is provided with a locking portion 13 at the open end.
2. The locking member 10 according to claim 1, further comprising an auxiliary member 20 which is installed so as to be engaged with and reduce the inner diameter of the annular body 11.

The means adopted by the invention of claim 3 is that the annular body 1
The locking member (10) according to claim 1 or 2, wherein the thread surface (14) of the female screw (12) is formed as a rough surface.
It is.

The means adopted by the invention of claim 4 is that the annular body 1
The locking member (10) according to any one of claims 1 to 3, wherein the thread (15) of one female screw (12) has a number of cuts (16) along the axial direction of the male screw (31).

The means adopted by the invention of claim 5 is that the annular body 1
Flange portion 17 formed along the circumferential direction at the base end of 1
The locking member 10 according to claim 1, further comprising:

The means adopted by the invention of claim 6 has a non-slip portion 60 extending from the open end of the annular body 11 along the outer periphery of the annular body 11. 4. The loosening prevention member 10 according to 4.

According to a seventh aspect of the present invention, a plurality of cuts 16a are provided in the inner periphery of the annular body 11 along the axial direction of the male screw 31 beyond the thread 15 of the female screw 12 of the annular body 11. The locking member 10 according to claim 1, wherein:

The means adopted by the invention of claim 8 is that the locking tongue 63 that bites into the gap between the nut 40 and the male screw 31 when mounted so as to be in contact with the upper surface of the nut 40, The locking member according to claim 1, wherein the locking member is provided at a base end.

According to a ninth aspect of the present invention, the annular body 11 is formed to be thin, and the thread formed when the female screw 12 is formed by press working also appears on the outer periphery of the annular body 11. The locking member 10 according to claim 1, wherein the locking member 10 is a locking member.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of the invention according to claim 1 is shown in FIGS. The anti-loosening member 10 according to this embodiment is formed in an approximately C-shaped cross-section by forming an annular body 11 from an elastic material such as a synthetic resin or a metal plate and opening a part of a side wall of the annular body 11. ing. Further, on the inner periphery of the annular body 11, the male screw 3 of the bolt 30 shown in FIG.
1 is formed with a female screw 12 to be screwed in such a manner that a gap is not generated as much as possible. In other examples, a scale 19 or a projection 19 as shown in FIG. Finished with a rough surface.

Therefore, the annular member 1 of the locking member 10
As shown in FIG. 2, the nut 1 is screwed into the bolt 30 to fasten the two parts 50 such as plate members, and then protrudes from the nut 40 as shown in FIG. If the anti-loosening member 10 is slid from the side into the male screw 31 of the bolt 30 to be screwed, the female screw 12 of the annular body 11 is screwed into the male screw 31 of the bolt 30. The installation time can be shortened, and it can be easily attached and detached by simply sliding in the direction opposite to the insertion direction when removing, so that it can be reused without damage and the cost is reduced because the manufacturing is easy. It is also possible.

Further, since the annular body 11 is formed of an elastic material which urges the male screw 31 so as to enclose the male screw 31, as shown in FIG.
0 and tightly screwed into the male screw 31 without any gap. For this reason, compared with the fact that the nut 40 is easily loosened by vibration by being screwed into the male screw 31 with a gap, the loosening prevention member 10 is not easily loosened by vibration. By acting, the loosening of the screw can be reliably prevented. Further, since the locking member 10 is formed of an elastic material, the female screw 12 of the annular body 11 is further tightened into the male screw 31 of the bolt 30 when vibration is applied, so that the screw is securely loosened. It can be prevented.

In the above embodiment, the material of the annular body 11 is not particularly limited as long as it is formed of an elastic material, and the range of the opened side wall of the annular body 11 is slid into the bolt 30. At this time, a material that can be easily inserted in consideration of the material of the annular body 11 and that does not easily fall off the bolt 30, that is, a material slightly smaller than the diameter of the bolt 30, is suitable.
The annular body 11 has a substantially C-shaped cross section.

On the other hand, the thread surface 1 of the female screw 12 of the annular body 11
4 is formed on a rough surface, so that the frictional force between the bolt 30 and the male screw 31 is increased.
The screwing force between the bolt and the male screw 31 of the bolt 30 is increased, so that the bolt 30 is hardly loosened. The female screw 1 of the annular body 11
The member 2 may be formed so as to be screwed into the male screw 31 of the bolt 30 without any gap, and various shapes can be adopted in addition to the above-described embodiment.

In particular, as shown in FIG. 10, the thread 15 of the internal thread 12 of the annular body 11 may be provided with a number of cuts 16 along the axial direction of the external thread 31 of the bolt 30. In this case, the provision of the notch 16 allows the annular body 11 to be uniformly tightened into the male screw 31, and the unevenness of the notch 16 increases the frictional force, so that the locking member 10
The screwing force between the bolt and the male screw 31 of the bolt 30 is increased, and the bolt 30 is hardly loosened.

Next, FIGS. 4 to 9 show an embodiment of the invention according to the second aspect.
Are provided at both open ends with locking portions 13 which are warped outward. Further, in this embodiment, a semicircular auxiliary member 20 having locking pieces 21 on both sides for engaging with the locking portions 13 is provided.
The auxiliary member 20 is slidably mounted on the locking member 10 from above, so that the locking member 1
The engagement portion 13 of the support member 20 and the engagement piece 21 of the auxiliary member 20 are engaged with each other so that the inner diameter of the annular body 11 can be reduced.

Accordingly, the locking member 1 according to this embodiment is provided.
0 is slidably inserted into the male screw 31 of the bolt 30 from the side, and the auxiliary member 20 is slidably mounted on the locking member 10 from above, whereby the inner diameter of the annular body 11 of the locking member 10 is reduced. As shown in FIG. 5, the female screw 12 of the annular body 11 is tightened to the male screw 31 of the bolt 30, and the female screw 12 of the locking member 10 is tightened.
Is screwed into the male screw 31 of the bolt 30 without any gap, the screwing force between the anti-loosening member 10 and the male screw 31 of the bolt 30 increases, and it becomes more difficult to loosen.

Although not shown, if the overall shape of the locking member 10 and the auxiliary member 20 is formed in a so-called tapered shape that spreads downward, the auxiliary member 20 is attached to the locking member 10 from above. When the slide is mounted, the female screw 12 of the annular body 11 becomes the male screw 31 of the bolt 30.
Further, the female screw 12 of the locking member 10 is further tightly screwed into the male screw 31 of the bolt 30 without any further clearance, and the locking of the locking is assured.

In this embodiment, as shown in FIGS. 7 and 8, the upper part of the locking portion 13 of the locking member 10 is tapered so that the auxiliary member 20 can be easily slidably mounted on the locking member 10. In the case of FIG. 7, a concave portion is provided below the locking portion 13 and a convex portion is provided below the locking piece 21 so that the engagement is not easily released after the mounting. In addition, in the case of FIG. 8, a concave portion is provided at the center of the locking portion 13, and a projection fitted to the concave portion is provided on the locking piece 21. Although not shown, if a guide groove in which the locking piece 21 of the auxiliary member 20 is fitted is provided on the back surface of the locking portion 13 of the locking member 10, the auxiliary member 20 will not be displaced.
The auxiliary member 20 is securely attached to the loosening prevention member 10, and the auxiliary member 20 does not shift or come off due to vibration or the like.

A semicircular notch 22 is provided at the lower part of the front wall of the auxiliary member 20 so that the auxiliary member 20 can be easily removed from the locking member 10. By twisting, the auxiliary member 20 can be easily removed from the locking member 10. Although not shown, if a guide groove in which the locking piece 21 of the auxiliary member 20 is fitted is provided on the back surface of the locking portion 13 of the locking member 10, the auxiliary member 20 will not be displaced, and the auxiliary member will be surely provided. 20 is attached to the locking member 10, and the auxiliary member 20 does not shift or come off due to vibration or the like.

Next, as shown in FIG. 6, on the inner peripheral surface of the auxiliary member 20, a ridge 23 abuts against the male screw 31 of the bolt 30.
, The loosening prevention member 10 is provided with the auxiliary member 2.
When 0 is attached, the protrusion 23 serves as a stopper for the locking member 10 and the auxiliary member 20, so that the locking of the screw is further ensured.

In the above embodiment, the locking portions 13 are provided at both open ends of the annular body 11, and the auxiliary member 20 is formed separately from the loosening prevention member 10.
As shown in FIG. 2, the auxiliary member 20 is extended from one open end of the annular body 11 to integrate the auxiliary member 20 into the locking member 10 so as to be openable and closable.
3 may be provided. In this case, only by closing the auxiliary member 20 and locking the locking piece 21 to the locking portion 13 of the annular body 11,
The inner diameter of the annular body 11 is reduced, and the annular body 11
The female screw 12 of the bolt 30 is screwed to the male screw 31 of the bolt 30 with no further clearance.

Next, FIG. 12 shows another embodiment. In this embodiment, a flange portion 17 is formed at the base end of the annular body 11 along the circumferential direction.
7 are formed with slits 18 at several places. In the case of this embodiment, the flange portion 17 serves as a washer by having the flange portion 17 in the annular body 11, further preventing loosening, and providing the slit 18 in the flange portion 17. When the locking member 10 is slid into the male screw 31 of the bolt 30, the presence of the flange portion 17 prevents the annular body 11 from becoming difficult to spread and becoming difficult to insert. By forming the bottom surface of the flange portion 17 as a rough surface, the frictional force with the nut 40 increases, and the loosening becomes more difficult.

FIG. 13 shows another embodiment. In this embodiment, a non-slip portion 6 that is folded back from the open end of the annular body 11 and extends along the outer periphery of the annular body 11 is provided.
Although 0 is formed, the necessity of this embodiment is based on the following reasons. That is, in the above-described embodiment, when the material is formed of a resin, it cannot be used as a building member because of a problem in weather resistance, and therefore, must be formed of a steel material.

However, if the locking member 10 is formed by using an excessively thick steel material for the annular body 11, a considerable force is required for the opening at the open end, as shown in FIG. Male screw 31 of bolt 30 projecting from nut 40
The problem that it becomes difficult to slide in from the side. Therefore, it is preferable that the annular body 11 is formed to have a certain thickness.

On the other hand, if the thickness is reduced, the problem of slide insertion can be solved, but the frictional force between the nut 40 and the base end of the annular body 11 when screwed into the male screw 31 of the bolt 30 becomes extremely small, so the looseness is reduced. A new problem arises in that the stopping effect is somewhat sacrificed. Of course, if the flange portion 17 is provided at the base end of the annular body 11 as in the embodiment of FIG.
Although this problem can be solved, forming such a flange portion 17 with steel involves various difficulties, which not only leads to an increase in manufacturing cost, but also increases the annular body 11 when slidingly inserted into the bolt 30. The conventional problem that a considerable force is required for the expansion of the vehicle occurs again.

Therefore, in this embodiment, as shown in FIG. 13, a non-slip portion 60 is formed by folding back from the open end of the annular body 11 and extending along the outer periphery of the annular body 11. . By doing so, when the locking member 10 is screwed onto the male screw 31 of the bolt 30, the annular member 1
1 and the base end of the non-slip portion 60 come into contact with the nut 40, and like the above-mentioned flange portion 17, they function as a washer and form the annular body 11 with a thin steel material. Even so, it is possible to reliably prevent loosening.

In this embodiment, the shape of the non-slip portion 60 is formed in a wavy shape in order to increase the contact area with the nut 40. However, as shown in FIG. The contact area can be increased even if it is formed thicker than that of the above, or the loosening can be surely prevented by forming the base end of the non-slip portion 60 with a rough surface such as a saw-like shape. In each embodiment shown in FIGS. 13 to 15, in order to further increase the contact area with the nut 40, another anti-slip piece 6 is also provided on the back of the annular body 11.
1 is provided.

Next, in the embodiment shown in FIG. 13 and the like, similarly to the embodiment shown in FIG. 10, the thread 15 of the female screw 12 of the annular body 11 is provided in the axial direction of the male screw 31 of the bolt 30. A number of cuts 16 are provided along. By providing the cuts 16, the annular body 11 becomes
When the annular body 11 is made of a steel material, the annular body 11 can be easily expanded when slidingly inserted into the bolt 30.

In the embodiment shown in FIG. 13, the anti-slip portion 60 is provided with locking holes 62a and 62b. The locking holes 62a and 62b are provided for engaging the tip of a special tool when expanding the annular body 11 and facilitating the expansion of the annular body 11. The locking hole 6 for pulling the outer side 60 to expand the annular body 11
2a and conversely, a locking hole 62b that pushes outward and expands the annular body 11 is provided.

The examples shown in FIG. 4, FIG. 9, FIG. 10 and FIG. 12 described above are the embodiments according to claim 2 and have a locking portion 13 at the open end of the annular body 11. Although there is a feature in the point, the locking portion 13 in these embodiments also functions as the non-slip portion 60 according to claim 6, and the same effect can be obtained. That is, 60
Therefore, the object of the present invention can be achieved without the auxiliary member 20 as long as the locking portion 13 is provided.

FIGS. 15 and 16 show still another embodiment in which an auxiliary member 20 separate from the locking member 10 is provided in the same manner as described with reference to FIG. By providing the locking portion 13 which also serves as the non-slip portion 60, the locking piece 21 of the auxiliary member 20 is engaged with the locking portion 13 of the locking member 10, and the inner diameter of the annular body 11 is reduced. It is designed to be erected. In addition,
As shown in the embodiment of FIG. 16, the auxiliary member 20 is extended from one end of the non-slip portion 60 to integrate the auxiliary member 20 with the loosening prevention member 10 so as to be openable and closable, and to the other open end of the annular body 11. An engaging portion 13 may be provided.

Here, an example of the manufacturing method of the embodiment shown in FIGS. 13 to 16 will be briefly described with reference to FIG. First, a thread 15 serving as the female screw 12 screwed to the male screw 31 of the bolt 30 is formed near the center of the steel plate A (the material is not particularly limited, such as an iron plate or a stainless steel plate). Next, a number of cuts 16 are formed so as to traverse the threads 15. Thereafter, both ends of the steel plate A are bent outward to form the non-slip portions 60, and the thread 1 near the center is formed.
5 is bent inward to form an annular body 11. By this operation, an annular body 11 having a substantially C-shaped cross section with an internal thread 12 formed on the inner periphery, and the annular body 11
The anti-loosening member 10 having the anti-slip portion 60 extending along the outer periphery of the anti-slipping member is formed.

FIGS. 18 to 21 show an embodiment of the invention according to claim 7 of the present application. These implementations are both
A number of cuts 16 a along the axial direction of the male screw 31 of the bolt 30 are provided on the inner circumference of the bolt 1 beyond the thread 15 of the female screw 12 of the annular body 11. That is, cut 1
6a is formed by cutting into the thread 15 or more of the female screw 12 to shorten the distance between the outer wall of the annular body 11 and the cut 16a. Here, the depth of the cut 16a may be appropriately adjusted depending on the material, hardness, and the like, so that the annular body 11 can be easily attached and detached so that the depth of the cut 16a and the outer wall of the annular body 11 are thick.

Therefore, in this embodiment, when the annular body 11 is a hard material such as steel, or when the distance between the outer wall of the annular body 11 and the thread 15 of the female screw 12 is long, that is, when the annular body 11 is thick. However, the provision of the notch 16a exceeding the screw thread 15 allows the annular member 1 to slide when the locking member 10 is slid into the bolt 30.
1 easily expands, making it easier to install.
1 can be formed to be thick, so that when it is mounted on the bolt 30, the area of adhesion to the nut 40 is increased, frictional resistance is increased, and loosening is more difficult.

Of course, in the embodiment shown in FIGS. 18 to 21 as well, the annular body 11
Is formed of an elastic material that urges the male screw 31 so as to enclose the male screw 31.
1 and tightly screwed into each other without any gap, so that loosening of the screw can be reliably prevented. Further, when vibration is applied, the female screw 12 of the annular body 11 is further tightened into the male screw 31 of the bolt 30. Thus, loosening of the screw can be reliably prevented.

In addition, the provision of the cuts 16a allows the annular body 11 to be uniformly tightened into the male screw 31, and the unevenness due to the cuts 16a to increase the frictional force. Increases the screwing force, making it more difficult to loosen. Further, if the contact surface of the annular body 11 with the nut 40 is formed as a rough surface, the frictional force with the nut 40 increases, so that the screwing force between the locking member 10 and the male screw 31 of the bolt 30 increases. It is even more difficult to loosen.
Further, in the embodiment shown in FIG. 18, a locking hole 62c is provided on the open end face of the annular body 11, and the locking hole 6c is provided.
Reference numeral 2c is provided for facilitating the expansion of the annular body 11 by engaging a tip of a special tool when expanding the annular body 11.

The range of the opened side wall of the annular body 11 can be easily inserted when slidingly inserted into the bolt 30 in consideration of the material of the annular body 11 as in the above-described embodiments. Conversely, a range that does not easily fall off the bolt 30, that is, one that is formed slightly smaller than the diameter of the bolt 30, is suitable.
Various shapes shown in FIGS. 18 to 21 can be adopted. That is, in the example shown in FIG. 18, the side wall of one side of the square is opened, the example of FIG. 19 shows two sides of the hexagon, the example of FIG. 20 shows one side of the hexagon, and the example of FIG. In the example, a part of the circular side wall is opened, and can be appropriately changed and applied according to the material of the annular body 11 and the place of use.

Also, a cut 16a that extends beyond the thread 15
In the example shown in FIG. 18, four places are provided on the inner wall of two opposing sides of the square and two places are provided on the other side. In the example shown in FIG. 19 and FIG. In the example of FIG. 21, there are provided 10 places and 8 places, and they are provided in a circular radial shape. However, the present invention can be applied by appropriately changing the material of the annular body 11 and the use place.

Further, in the embodiment shown in the drawings, the shape of the cut 16a is also tapered positively tapered as it goes inward, but the shape is not particularly limited. It may be an inverted tapered shape that swells as it goes further. When the cut 16a has an inverted taper shape, the locking member 10 can be manufactured easily and the elastic body 11 has more elasticity.

Next, FIG. 22, FIG. 24 and FIG. 25 show an embodiment of the invention according to claim 8. In each of these embodiments, a locking tongue 63 is provided at the base end of the annular body 11, and FIG.
As shown in FIG. 6, when the locking member 10 is mounted so as to be in contact with the upper surface of the nut 40, the locking tongue 63 bites into the gap between the nut 40 and the male screw 31, and the nut 40 is reliably prevented from being loosened. It becomes.

In particular, in the embodiment shown in FIG. 24, in addition to the locking tongue 63, the locking portion 13 which also functions as the non-slip portion 60 according to the sixth aspect is provided at the open end of the annular body 11. The thread 15 of the female screw 12 of the annular body 11 is provided with a large number of cuts 16 along the axial direction, whereby the annular body 11 is uniformly tightened in the male screw 31, and the frictional force due to the unevenness due to the cut 16. Becomes larger and the locking tongue 63 bites, making it more difficult to loosen.

On the other hand, in the embodiment shown in FIG. 25, the annular body 11 is formed thinner than the embodiment shown in FIG.
In addition to forming the locking tongue 63 at the base end of the open end of the annular body 11,
It is also formed at the middle base end of the annular body 11. Therefore, in the case of this example, the gap between the nut 40 and the male screw 31 is 4 mm.
The locking tongues 63 at the two locations bite into each other, making it more difficult to loosen.

As described above, if the locking tongue 63 is formed at the base end of the annular body 11 so as to bite into the gap between the nut 40 and the male screw 31, the shape, size or position of the locking tongue 63 is particularly small. The present invention is not limited thereto, and can be appropriately changed and applied according to the material of the nut or the male screw, the size and shape of the gap, the material of the locking member 10, the thickness of the annular body 11, and the like.

Next, FIGS. 26 and 27 show an embodiment of the ninth aspect of the present invention. In each of these embodiments, the annular body 11 is formed to be thin and the female screw 12 is formed by press working.
1 also appears on the outer periphery.
These embodiments can be formed by press working in addition to the above-described loosening prevention effect, so that they are low in cost and excellent in mass productivity.

In particular, in the embodiment shown in FIG. 27, the annular body 11 is formed to be thin, and the locking tongue 63 according to claim 8 is formed at the open end of the annular body 11.
Furthermore, a number of cuts 16 are provided in the thread 15 of the female screw 12 of the annular body 11 along the axial direction. Accordingly, it is possible to mass-produce, at low cost, the locking member 10 that can uniformly tighten the annular body 11 into the male screw 31 and reliably prevent the locking tongue 63 from being loosened by biting.

FIG. 28 shows an example of a method of manufacturing the locking member according to the embodiment shown in FIG. That is, a spring steel material having a thickness of about 0.3 mm to 0.8 mm as shown in FIG. 27 (a) is prepared, and is subjected to a general press working conventionally performed. Form female threads, notches and locking tongues as shown. Then, by folding inward from both ends and quenching, an internal thread is formed on the inner periphery of the annular body formed into a substantially C-shaped cross section by the elastic material, and the internal thread has a cut, and the base of the annular body is formed. A locking member with a locking tongue at the end is produced. Therefore, since a conventional general manufacturing method can be applied as it is, mass production can be performed at low cost. Here, the material and thickness of the annular body 11 are not particularly limited, and may be any as long as they are suitable for press working.

Next, another embodiment of the invention according to claim 2 is shown in FIGS. Although the embodiment according to claim 2 has been described in detail with reference to FIGS. 4 to 9, another example different from these embodiments will be described below. The locking member 10 in FIG. 29 is provided with a locking portion 13 that warps outward at both open ends of the annular body 11, and further has an engagement notch 64 formed at the center of the locking portion. In this embodiment, a semicircular auxiliary member 20 is provided which has locking pieces 21 on both sides for engaging with the engagement notches 64 of the locking portion 13 and is urged to contract inward. It is a thing. Thus, when the auxiliary member 20 is slidably mounted on the locking member 10 from the side, the locking portion 13 of the annular body 11 and the locking piece 21 of the auxiliary member 20 are engaged, and the inner diameter of the annular body 11 is reduced. So that the annular body 11 has an external thread 31
And the nut 40 is securely prevented from loosening.

In the vicinity of the two locking pieces 21 of the auxiliary member 20, a hooking portion 24 which is warped outward is formed, and the hooking portion 24 is pryed open by the tip of a driver or the like, whereby the auxiliary member 20 is opened. Is released from the engagement notch 64 of the annular body 11, so that the auxiliary member 20 can be easily removed from the annular body 11.

Next, the locking member 10 shown in FIG.
Is provided with a locking portion 13 which is warped outward at both open ends of the annular body 11 and further has an engaging hole 65 formed at the center of the locking portion. Engagement hole 65
And a semicircular auxiliary member 20 formed of a bar material that is engaged with the auxiliary member and urged to contract inward. By attaching the auxiliary member 20 to the locking member 10, the engagement hole 65 of the annular body 11 and the auxiliary member 20
Are engaged so as to reduce the inner diameter of the annular body 11, so that the annular body 11 is fastened to the male screw 31,
The loosening of the nut 40 is reliably performed.

The locking member 10 shown in FIG.
In the embodiment shown in FIG. 0, an engaging pin 66 is provided instead of the engaging hole 65 in the locking portion 13 of the annular body 11, and a wire is used as the auxiliary member 20. In this embodiment, as in the other embodiments, the wire 20 as the auxiliary member 20 is installed so that the inner diameter of the annular body 11 is reduced, whereby the annular body 11 is tightened to the male screw 31 and the nut 40 is loosened. Stopping is simple and reliable.

[0057]

As described above, according to the present invention,
The female screw 12 of the annular body 11 is screwed into the male screw 31 only by slidingly inserting the locking member 10 into the male screw 31 of the bolt 30, so that no complicated work as in the related art is required, and the construction time is reduced. Since it can be easily attached and detached, it can be reused without being damaged, and the cost can be reduced because the production is easy.

Since the anti-loosening member 10 is made of an elastic material, the female screw 12 of the annular body 11 is tightly screwed into the male screw 31 of the bolt 30 without any gap. It acts to prevent loosening of the screw, and furthermore, when vibration is applied, the female screw 12 of the annular body 11 becomes the male screw 31 of the bolt 30.
Therefore, an excellent effect is obtained that the loosening of the screw can be surely prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a locking member according to the present invention.

FIG. 2 is a perspective view showing how to use the embodiment shown in FIG. 1;

FIG. 3 is an enlarged longitudinal sectional view of a state in which a locking member is installed in FIG. 2;

FIG. 4 is a perspective view showing a second embodiment of the locking member according to the present invention.

5 is a cross-sectional view showing a state where the locking member of FIG. 4 is mounted.

FIG. 6 is a cross-sectional view showing a state where another auxiliary member is mounted.

FIG. 7 is an enlarged vertical sectional view showing the vicinity of a locking portion in FIG.

FIG. 8 is an enlarged vertical sectional view showing the vicinity of another locking portion in FIG.

FIG. 9 is a perspective view showing a third embodiment of the locking member according to the present invention.

FIG. 10 is a perspective view showing a fourth embodiment of a locking member according to the present invention.

FIG. 11 is a partially enlarged perspective view showing a thread in another locking member.

FIG. 12 is a perspective view showing a fifth embodiment of a locking member according to the present invention.

FIG. 13 is a perspective view showing a sixth embodiment of the locking member according to the present invention.

FIG. 14 is a plan view showing a seventh embodiment of a locking member according to the present invention.

FIG. 15 is a plan view showing an eighth embodiment of the locking member according to the present invention.

FIG. 16 is a plan view showing a ninth embodiment of a locking member according to the present invention.

FIG. 17 is a perspective view illustrating an example of a method of manufacturing the locking member illustrated in FIG. 13;

FIG. 18 is a perspective view showing an embodiment of the invention according to claim 7;

FIG. 19 is a plan view showing another embodiment of the invention according to claim 7;

FIG. 20 is a plan view showing still another embodiment of the invention according to claim 7;

FIG. 21 is a plan view showing another embodiment of the invention according to claim 7;

FIG. 22 is a perspective view showing an embodiment of the invention according to claim 8;

FIG. 23 is an enlarged partial sectional view of FIG.

FIG. 24 is a perspective view showing another embodiment of the invention according to claim 8;

FIG. 25 is a perspective view showing another embodiment of the invention according to claim 8;

FIG. 26 is a perspective view showing an embodiment of the invention according to claim 9;

FIG. 27 is a perspective view showing another embodiment of the invention according to claim 9;

FIG. 28 is a perspective view showing an example of the manufacturing method of the embodiment shown in FIG. 27.

FIG. 29 is a perspective view showing another embodiment of the invention according to claim 2;

FIG. 30 is a perspective view showing another embodiment of the invention according to claim 2;

FIG. 31 is a perspective view showing still another embodiment of the invention according to claim 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Loose stop member 11 Annular body 12 Female screw 13 Engagement part 14 Screw surface 15 Thread 16 Notch 17 Flange part 18 Slit 19 Projection 20 Auxiliary member 21 Engagement piece 22 Notch 23 Projection 24 Hook part 30 Bolt 31 Male screw 40 Nut 50 Part to be fastened 60 Non-slip part 61 Non-slip piece 62 Lock hole 63 Lock tongue 64 Lock notch 65 Lock hole 66 Lock pin A Steel plate

Claims (9)

[Claims] 1. An anti-loosening member mounted on an external thread so as to abut against an upper surface of the nut to prevent the screw from being loosened when a component is fastened by screwing the nut onto an external thread such as a bolt. A female screw that is screwed to the male screw is formed on the inner periphery of an annular body having a part of a side wall opened to have a substantially C-shaped cross section, and the annular body encloses the male screw A locking member formed of an elastic material which urges the locking member. 2. An annular member is provided with a locking portion at an open end thereof, and an auxiliary member is provided so as to be engaged with the locking portion to reduce the inner diameter of the annular body. The locking member according to claim 1. 3. The loosening prevention member according to claim 1, wherein a thread surface of the female screw of the annular body is formed as a rough surface. 4. The locking member according to claim 1, wherein the thread of the female screw of the annular body has a number of cuts along the axial direction of the male screw. 5. The apparatus according to claim 1, further comprising a flange formed at a base end of the annular body along a circumferential direction.
A locking member according to any one of claims 1 to 4. 6. The locking member according to claim 1, further comprising a non-slip portion extending from an open end of the annular body along an outer periphery of the annular body. 7. The locking device according to claim 1, wherein a number of cuts are formed in the inner periphery of the annular body along the axial direction of the external thread beyond the threads of the internal thread of the annular body. Element. 8. The annular body has a locking tongue at a proximal end thereof which bites into a gap between the nut and the male screw when the nut is mounted so as to be in contact with an upper surface of the nut. The locking member according to any of the preceding claims. 9. The locking device according to claim 1, wherein the annular body is formed to be thin, and a thread when the female screw is formed by press working also appears on the outer periphery of the annular body. Element.