JPH09250535A - Washer, double nut structure, and bracing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washer performing powerful locking and slip-off preventive function. SOLUTION: A screw inserting hole penetrating a male screw body 9 and a upstanding part 1b rising diagonally and axially so that its tip is faced the center side of the screw inserting hole are provided by processing board material, and when a fasting structure containing the male screw body 9 is fastened up and the upstanding part 1b is axially compressed, the upstanding part 1b is made to be deformed and its tip is made to be bitten the thread groove of the male screw body 9. Therefore, the tip of the upstanding part 1b bites the thread groove of the male screw body 9, so that a female screw body 10 screwed to the washer 1 to the male screw body9, as a result to the male screw body 9 as well, is locked, achieving of powerful locking and slip-off prevention.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer interposed in a fastening structure using screws, a double nut structure utilizing the washer, and a steady rest structure for a male screw body screwed to a tubular member.

[0002]

2. Description of the Related Art Conventionally, spring washers, toothed washers, disc spring washers, etc. have been known as washers having a screw locking function.

A double nut structure is known as another type of screw locking structure.

On the other hand, when the male screw body is screwed into the female screw portion provided on the inner periphery of the tubular member, the male screw body is vis-a-vis the tubular member due to backlash of the screwed portion or deformation of the peripheral wall in the tubular portion. May relatively swing. Conventionally, in order to prevent relative deflection of the male screw body with respect to such a tubular member, it is necessary to increase the precision of screwing the tubular member and the male screw body and to increase the rigidity of the tubular member. However, there was a problem that the cost would be very high if such a method was adopted. In order to solve such a problem, the applicant of the present invention has proposed, in Japanese Unexamined Patent Publication No. 5-172130, a steady rest structure in which a steady rest is screwed onto a male screw body and the tubular member is pressed by the steady rest.

[0005]

The above-mentioned conventional washer and double nut structure have a problem that they do not have a sufficient locking function.

Further, in the steady rest structure, the steady rest may loosen and the male screw body may swing relative to the tubular member in some cases.

The present invention has been made in view of such conventional circumstances, and it is an object of the present invention to provide a washer which exerts a strong locking and retaining function.

Another object of the present invention is to provide a double nut structure which exerts a strong locking function by utilizing such a washer.

Another object of the present invention is to provide a steady rest structure which prevents the steady rest from being loosened by utilizing the above-mentioned washer.

Further objects of the present invention will be apparent from the following description.

[0011]

In the washer of the present invention, the plate member is machined to form a screw insertion hole through which the male screw body is inserted and an oblique axial direction so that the tip end faces the center side of the screw insertion hole. When the fastening structure including the male screw body is tightened and the rising portion is axially compressed, the rising portion is deformed so that its tip bites into the thread groove of the male screw body. .

Then, the tip of the rising portion bites into the thread groove of the male screw body, whereby the washer and, by extension, the female screw body with which the male screw body is screwed are locked, and a strong loosening prevention and slip-out prevention are achieved. To be done.

Further, in the double nut structure of the present invention, the washer is interposed between two nuts. This makes it possible to prevent the inner nut (the nut closer to the tightened body) from loosening even if the outer nut (the nut farther from the tightened body) becomes loose.

Further, in the retaining structure of the present invention,
The steady body is provided with a holding portion that comes into contact with the outer peripheral side of the tubular member when rotated in the tightening direction with respect to the male screw body. Then, the washer is housed in the holding portion in a state where the male screw body is inserted into the male screw insertion hole and the outer periphery of the washer is fitted to the inner surface of the holding portion of the steady rest. As a result, the steady rest is strongly prevented from loosening.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on Examples.

[0016]

1 to 6 show an embodiment of a washer according to the present invention. This washer 1 is made by integrally forming a metal plate material such as a steel plate by press working, and its outer peripheral shape is roughly square, and its four corners form fulcrums 1a. The four fulcrum portions 1a are configured to come into contact with one common plane (the seat surface of the nut 10 in the case of the embodiment of the fastening structure described later). A screw insertion hole 2 is formed in the central portion of the washer 1. Rising portions 1b are formed between the fulcrums 1a, and these rising portions 1b are erected in the oblique axial direction so that their tips are directed toward the center of the screw insertion hole 2. The leading end of the rising portion 1b has an arc shape. In addition, the rising portion 1b is a fulcrum portion 1 in a free state before tightening.
It is curved so as to rise above the plane with which a contacts.

FIGS. 7 and 8 show a washer 1 of the first embodiment shown in FIGS. 1 to 6 with a male screw body 9 such as a bolt and a conventional nut 1.
The example used for the fastening structure by 0 is shown.

In this fastening structure, the washer 1 is inserted between the nut 10 and the tightened body 11 while being inserted into the male screw body 9. The diameter of the screw insertion hole 2 of the washer 1 is slightly larger than the outer diameter of the male screw of the male screw body 9. The tightened body 11 is fastened between the nut 10 and the head (not shown) of the male screw body 9 with the male screw body 9 inserted through the hole 13.

In this embodiment, when the nut 10 is tightened, first, the fulcrum portion 1a of the washer 1 is shown in FIG.
Is in contact with the seat surface of the nut 10 and the tip of the rising portion 1b is in contact with the body 11 to be fastened, and when tightening is further performed, the rising portion 1b of the washer 1 is moved as shown in FIG. By being sandwiched between the nut 10 and the tightened body 11 and compressed in the axial direction, the nut 10 is deformed inward and the tip of the rising portion 1b bites into the thread groove of the male screw body 9. As a result, the washer 1 is locked with respect to the male screw body 9. Then, since the nut 10 is strongly pressed against the washer 1, the nut 10
Cannot rotate with respect to the washer 1, so that the nut 10 is also locked with respect to the male screw body 9, so that the nut 10 is prevented from loosening.

At this time, the washer 1 also acts as a loosening stopper by the spring effect, as in the case of a normal spring washer. Particularly, in this embodiment, the rising portion 1b has the nut 1
Since it is curved so as to be lifted from the seat surface of 0, the spring effect can be further enhanced.

Further, as described above, the tip of the rising portion 1b of the washer 1 is set in the thread groove of the male screw body 9 so that even if the nut 10 is detached from the male screw body 9, the male screw body 9 The body 9 does not fall out of the hole 13 of the tightened body 11, and the male screw body 9 is prevented from coming off.

Further, the screw insertion hole 2 of the washer 1 is inserted into the male screw body 9
If it is larger than the outer diameter of the male screw of
When the male screw body 9 is inserted into, the tip of the rising portion 1b does not damage the male screw of the male screw body 9.

FIGS. 9 and 10 show an embodiment in which the washer 1 of the first embodiment shown in FIGS. 1 to 6 is used in a double nut structure, and nuts 10 and 12 screwed to a male screw body 9 are shown. A washer 1 is screwed between and.

Also in this embodiment, when the nut 12 is tightened after the nut 10 is tightened, as shown in FIG.
When the fulcrum portion 1a of the washer 1 is brought into contact with the seating surface of the nut 12 and the tip of the rising portion 1b is brought into contact with the nut 10 as shown in FIG.
As shown in FIG. 10, the rising portion 1b of the washer 1 has the nut 10
By being sandwiched between and and compressed in the axial direction, it is deformed inward and the tip of the rising portion 1b bites into the thread groove of the male screw body 9. As a result, the washer 1 is locked to the male screw body 9, and the nut 12 is also locked to the male screw body 9 to prevent the nut 12 from loosening.

Here, in the present embodiment, even if the outer nut (the nut farther from the object to be fastened) 12 is loosened, the inner nut (the nut closer to the object to be fastened) 10 is fixed by the washer 1. Since it is prevented from loosening, it is possible to more firmly prevent the loosening compared with the normal double nut structure.

Further, as in the case of the above-described embodiment, even if the nut 12 is removed from the male screw body 9, the nut 10 is further removed from the male screw body 9 and the male screw body 9 is tightened.
It does not fall out of the hole 13 of No. 1 and the retaining of the male screw body 9 is also achieved.

11 to 16 show a washer 1 of the first embodiment.
An example of a steady rest structure according to the present invention using In this embodiment of the steady rest structure, the steady rest structure of the present invention is applied to a floor bundle interposed between the foundation floor surface and the floor beam member. In FIGS. 11 and 12, a lower male screw body 4 is fixed to a central portion of a base plate 3 which is fixed on a base floor surface (not shown) with an adhesive or the like so as to rise vertically.

Reference numeral 5 denotes a cylindrical member, and the vicinity of the upper end and the vicinity of the lower end of the cylindrical member 5 are squeezed to form small diameter portions 5a, respectively, while the intermediate portion 5b is thickened to form the small diameter portion 5a. A tapered portion 5c is formed between the intermediate portion 5b and the intermediate portion 5b. In this embodiment, the small-diameter portion 5a and the tapered portion 5c are circular in cross section and the intermediate portion 5b is square in cross section, but the intermediate portion 5b may be circular in cross section. A female screw portion 5d is formed on the inner circumference of the upper and lower small diameter portions 5a.
Are provided respectively.

The lower female screw portion 5d of the tubular member 5 is screwed to the lower male screw body 4, and the upper male screw body 6 is screwed to the upper female screw portion 5d of the tubular member 5. . On the upper end of the upper male screw body 6, there is fixed a floor beam support member 7 which is bent in a generally U-shape. A steady rest 8 is screwed onto the lower male screw body 4 and the upper male screw body 6, respectively.

The steady rest 8 is integrally formed by pressing from a metal plate such as a steel plate, and has a base portion 8a.
And four pressing portions 8b. The base 8a
Further comprises a shoulder portion 8c and a tubular portion 8d, and the shoulder portion 8c
Has a substantially quadrangular shape, and the tubular portion 8d rises from the central portion of the shoulder portion 8c in a direction perpendicular to the shoulder portion 8c. A female screw portion 8e is provided on the inner circumference of the cylindrical portion 8d. Each pressing portion 8b has a tongue-like shape,
It extends from the four sides of the shoulder portion 8c in the direction opposite to the tubular portion 8d. Then, as well shown in FIGS. 15 and 16, a portion other than the vicinity of the tip of each holding portion 8b is made flat and extends in a direction parallel to the axis of the steady rest 8 (the axis of the female screw portion 8e). However, the portion near the tip of each holding portion 8b is curved and expanded outward.

The washer 1 is housed in the holding portion 8b of each steady rest 8, and in this state, the male screw bodies 4 and 6 are inserted into the male screw insertion holes 2 of the washer 1 and the outer periphery of the washer 1 is inserted. Is fitted to the inner surface of the pressing portion 8b, and the rising portion 1
The tip of b is directed to the upper end and the lower end of the tubular member 5.
The screw insertion hole 2 of the washer 1 is set to be slightly larger than the outer diameter of the male screw of the male screw bodies 4 and 6.

In this floor bundle, the cylindrical member 5 is attached to the upper and lower male screw bodies 4 and 6 with the steady rest 8 loosened.
By relatively rotating the base plate 3, the height of the floor beam support member 7 from the base plate 3 and thus the foundation floor surface can be adjusted. Further, in the state in which the steady rest 8 is loosened in this way, due to backlash of the screwed portion between the male screw bodies 4 and 6 and the tubular member 5 or deformation of the peripheral wall of the small diameter portion 5a of the tubular member 5,
There is a possibility that the male screw bodies 4 and 6 may swing with respect to the tubular member 5.

However, after adjusting the height of the floor beam supporting member 7 as described above, as shown in FIGS. 15 and 16, when each steady body 8 is tightened, the steady body 8 is The inner surface of the pressing portion 8b is strongly brought into contact with the outer periphery of the tapered portion 5c of the tubular member 5, so that the male screws 4 and 6 can be prevented from swinging with respect to the tubular member 5. This allows
Relative runout of the male screw bodies 4, 6 with respect to the tubular member 5 is prevented without increasing the precision of screwing the tubular member 5 and the male screw bodies 4, 6 or increasing the rigidity of the tubular member 5. can do.

When the steady rests 8 are tightened in this manner, first, as shown in FIG.
When a is brought into contact with the inner surface of the shoulder portion 8c of the base portion 8a of the steady rest 8 and the tips of the rising portions 1b are brought into contact with the upper and lower ends of the tubular member, and further tightening is performed, as shown in FIG. As described above, the rising portion 1b of the washer 1 is sandwiched between the inner surface of the shoulder portion 8c of the steady body 8 and the upper and lower ends of the tubular member 5 and is axially compressed to be deformed inward. The leading end of the rising portion 1b is in a state of biting into the thread grooves of the male screw bodies 4 and 6. As a result, the male screw bodies 4, 6
On the other hand, the washer 1, by extension, the tubular member 5 and the steady rest 8 are locked, and the steady rest 8 is prevented from loosening.

In this embodiment, the washer 1 has a non-circular outer peripheral shape, and the outer periphery of the washer 1 is a steady rest 8.
Since the washer 1 cannot be rotated with respect to the steady body 8 even before being tightened by being fitted to the inner surface of the holding portion 8b, the rising portion 1 of the washer 1 is tightened by tightening.
When the tip of b is in a state of biting into the thread grooves of the male screw bodies 4 and 6, the washer 1 and by extension, the steady rest 8 are further firmly locked to the male screw bodies 4 and 6.

17 and 18 show a second embodiment of a washer according to the present invention. The washer 1 of this embodiment has a substantially hexagonal outer peripheral shape, and six rising portions 1b are provided. Also in the washer of this embodiment, the same effect as that of the washer 1 of the first embodiment can be obtained.

19 to 21 show a third embodiment of a washer according to the present invention. The washer 1 of this embodiment has a truncated cone surface like the conventional disc spring washer. The whole 1 constitutes the rising portion 1b. A screw insertion hole 2 is formed in the center of the washer 1.

22 and 23 show the washer 1 of the third embodiment shown in FIGS.
The example used for the fastening structure according to FIG.

In this fastening structure, the washer 1 is inserted between the nut 10 and the tightened body 11 while being inserted into the male screw body 9. The diameter of the screw insertion hole 2 of the washer 1 is smaller than that of the conventional disc spring washer 1 and is slightly larger than the outer diameter of the male screw of the male screw body 9.

Also in this embodiment, when the nut 10 is tightened, the washer 1 is sandwiched between the seat surface of the nut 10 and the tightened body 11 and axially compressed as shown in FIG. As a result, the tip of the rising portion 1b that is deformed inward and that constitutes the entire washer 1 bites into the thread groove of the male screw body 9 (FIG. 22 is a state immediately before the nut 10 compresses the washer 1, FIG. Shows the state after the washer 1 is compressed). Thereby, as in the case of the above embodiment,
The washer 1 and thus the nut 10 are locked with respect to the male screw body 9, and the nut 10 is loosened and the male screw body 9 is loosened.
Is prevented from coming off. In the present embodiment as well, the washer 1 exerts the loosening prevention function by the spring effect, similarly to a normal spring washer and a disc spring washer.

FIGS. 24 and 25 show an embodiment in which the washer 1 of the third embodiment of FIGS. 19 to 21 is used in a double nut structure, and nuts 10 and 12 screwed to the male screw body 9 and. The washer 1 is screwed between the two.

Also in this embodiment, as shown in FIGS.
The same effect as the embodiment of the double nut structure can be obtained.

[0043]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, it is possible to obtain excellent effects such as strong locking and retaining functions.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of a washer according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a bottom view showing the washer of the first embodiment.

FIG. 5 is a front view showing a washer of the first embodiment.

FIG. 6 is a side view showing a washer of the first embodiment.

FIG. 7 is a vertical cross-sectional view showing an example of a fastening structure (a state immediately before the washer is compressed) using the washer of the first embodiment.

FIG. 8 is a vertical cross-sectional view showing an embodiment of a fastening structure using the washer of the first embodiment (state after the washer is compressed).

FIG. 9 is a vertical cross-sectional view showing an embodiment of a double nut structure (a state immediately before the washer is compressed) using the washer of the first embodiment.

FIG. 10 is a vertical cross-sectional view showing an example of a double nut structure (a state after the washer is compressed) using the washer of the first embodiment.

FIG. 11 is a vertical cross-sectional view showing an embodiment of a steady rest structure using the washer of the first embodiment.

FIG. 12 is a front view showing an embodiment of the steady rest structure.

FIG. 13 is a plan view showing a steady rest in an embodiment of the steady rest structure.

FIG. 14 is a bottom view showing the steady rest.

FIG. 15 is a cross-sectional view showing a main part (a state immediately before a washer is compressed) of an embodiment of the steady rest structure.

FIG. 16 is a sectional view showing a main part (a state after the washer is compressed) of the embodiment of the steady rest structure.

FIG. 17 is a plan view showing a second embodiment of a washer according to the present invention.

18 is a sectional view taken along line XVIII-XVIII in FIG.

FIG. 19 is a plan view showing a third embodiment of a washer according to the present invention.

FIG. 20 is a front view showing a washer of the third embodiment.

21 is a cross-sectional view taken along line XXI-XXI of FIG.

FIG. 22 is a vertical cross-sectional view showing an embodiment of a fastening structure using the washer of the third embodiment (a state immediately before the washer is compressed).

FIG. 23 is a vertical cross-sectional view showing an embodiment of a fastening structure using the washer of the third embodiment (a state after the washer is compressed).

FIG. 24 is a vertical cross-sectional view showing an example of a double nut structure (a state immediately before the washer is compressed) using the washer of the third embodiment.

FIG. 25 is a vertical cross-sectional view showing an embodiment of a double nut structure (state after the washer is compressed) using the washer of the third embodiment.

[Explanation of symbols]

 1 washer 1a fulcrum part 1b rising part 2 screw insertion hole 4 lower male screw body 5 cylindrical member 5d female screw part 6 upper male screw body 8 steady rest 8a base part 8b retaining part 8e female screw part 9 male screw body 10, 12 nut

Claims (6)

[Claims] 1. A rising member, which is formed by processing a plate material and through which a male screw body is inserted, and a rising portion that rises in an oblique axial direction so that a tip end faces the center of the screw inserting hole. When the fastening structure including the male screw body is tightened and the portion is axially compressed by the fastening structure, the tip of the rising portion is deformed so as to bite into the thread groove of the male screw body. Washer to be 2. A state before tightening of the tightening structure, comprising a plurality of fulcrum parts that can be brought into contact with one common plane, and the rising parts are formed between the fulcrum parts, respectively. 2. The washer according to claim 1, wherein the rising portion is curved so as to float above the plane on which the plurality of fulcrum portions abut. 3. The washer according to claim 1, wherein the rising portion has a truncated cone surface shape. 4. A double nut structure in which two nuts are overlapped and screwed onto a common male screw body in common, and a plate material is machined, and a screw insertion hole through which the male screw body is inserted and a tip of the screw thread are formed. A washer that is provided between the two nuts and that rises in an oblique axial direction so as to face the center of the insertion hole; and the riser of the washer is tightened with the nut. A double nut structure, wherein when the nuts are compressed in the axial direction, the tips of the rising portions are deformed so as to bite into the thread grooves of the male screw body. 5. A steady rest structure of a male screw body screwed to a female screw portion provided on an inner circumference of a tubular member, wherein a base portion screwed to the male screw body and an axis line of the base portion are surrounded. A steady portion having a pressing portion extending from the base portion, and an inner surface side of the pressing portion is brought into contact with an outer peripheral side of the tubular member by being rotated in a tightening direction with respect to the male screw body; And a washer having a screw insertion hole and a rising portion that rises in an oblique axial direction so that the tip end faces the center side of the screw insertion hole, and the washer is the male screw insertion hole. When the male screw body is inserted into and the outer circumference of the washer is fitted into the inner surface of the holding portion and is housed in the holding portion and the steady body is tightened, the steady body With the inner surface of the base A steady structure in which the rising portion is clamped by the tip end surface of the tubular member and is compressed in the axial direction, and the rising portion is deformed so that the tip of the rising portion bites into the thread groove of the male screw body. 6. The washer has a plurality of fulcrum portions that come into contact with the inner surface of the base portion of the steady rest, and the rising portions are formed between the fulcrum portions, respectively. 6. The rising portion is curved so as to float above the plane in a state before being tightened.
The steady rest structure described.