JP2002130231A - Nut for unidirectional screw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a unidirectional screw nut, which can suitably be used for fastening and fixing with bolts and nuts, a soundproof panel to a square tube support composing a road sound barrier wall. SOLUTION: This unidirectional screw nut comprises a first cylindrical material, having a dead-end flange on the outer periphery of its base edge and a taper part on the outer peripheral face of its front half, a second cylindrical material, which has a push flange on its tip part, will not co-rotate together with a bolt toward the inner diametrical face of the first cylindrical material but is fitted thereinto, so as to enable movement in an axial direction and a third cylindrical material which is fitted in common to the respective outer peripheral faces of the above first and second materials, overlaps the outer peripheral face of the above tapered part in one side portion of its inner diametrical face and abuts on the above push flange in its one edge portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for a one-way screw nut which can be suitably used, for example, when a soundproof panel is fastened and attached to a rectangular tube support constituting a road soundproof wall with bolts and nuts. Belongs to the field.

[0002]

2. Description of the Related Art Conventionally, one-way screw fixing nuts have been
P3014563 specification and drawings, JP-B-44-10
No. 94, Japanese Patent Publication No. 44-31008, Japanese Utility Model Showa No. 51-40
No. 022, No. 60-8543, No. 4-436
No. 13 and Japanese Utility Model Publication No. 1-143810, and many others are known.

[0003]

The above-mentioned known one-way screw nuts have their respective features and functions.
However, there is a dissatisfaction with any application intended to be used by the present applicant by fastening the soundproof panel with bolts and nuts to the rectangular pipe support constituting the road soundproof wall with bolts and nuts.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a nut for unidirectional screwing, which is particularly suitable for use in fastening and attaching a soundproof panel to a square pipe support constituting a soundproof wall for roads with bolts and nuts. It is to be.

[0005]

As a means for solving the problems of the prior art, a one-way screw nut according to the present invention has a dead end flange on the outer periphery of a base end portion. A first cylindrical member having a tapered portion with a tapered shape on an outer peripheral surface of a substantially front half portion, and a pressing flange on an outer periphery of a distal end portion, the shaft being tight to the extent that it does not co-rotate with a bolt to the inner diameter surface portion of the first cylindrical member; The second cylindrical member fitted in a state capable of moving in the direction and the outer peripheral surface of each of the first and second cylindrical members are commonly fitted to each other, and one side portion of the inner diameter surface thereof is the first cylindrical member. And a third cylindrical member having one end portion abutting on a pushing flange of the second cylindrical member, and a female screw is formed on an inner diameter surface of the second cylindrical member. And the outer diameter of a substantially rear half of the first cylindrical member is the second circle. The outer diameter of the push flange of the material is larger than the outer diameter of the third cylindrical material, and the outer peripheral surface of the substantially rear half of the first cylindrical material rotates together with the bolt into the mounting hole of the member to be fastened. The second cylindrical member is pulled toward the front side by the tightening force of the bolt screwed into the female screw of the second cylindrical member. The third cylindrical member is also drawn by the pushing flange, the front end thereof abuts against the other side surface of the member to be fastened, and the member to be fastened is sandwiched and supported between the dead end flange. And

According to a second aspect of the present invention, in the one-way screwing nut according to the first aspect, the outer peripheral surface of the substantially rear half of the first cylindrical member is crushed when driven into the mounting hole of the member to be fastened. It is characterized in that it has been subjected to unevenness processing so as to fit tightly so as not to rotate together with the bolt.

According to a third aspect of the present invention, in the one-way screw nut according to the first aspect, the outer peripheral surface of the second cylindrical member is so tight that it does not rotate together with the bolt to the inner peripheral surface of the first cylindrical member. In addition, it is characterized in that it has been subjected to uneven processing for fitting it to the extent possible in the axial direction.

According to a fourth aspect of the present invention, in the one-way screwing nut according to the first aspect, the screw thread and the height of the female screw cut on the inner diameter surface of the second cylindrical member are increased. It is characterized in that a locking piece is provided which is equally and perpendicular to the axis.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a nut for a one-way screw according to the present invention.

As shown in FIGS. 1 and 2, the one-way screw nut according to the present invention has a dead end flange 11 on the outer periphery of a base end portion, and a tapered tapered portion on an outer peripheral surface of a substantially front half portion. A first cylindrical member 1 having a 12 and a pressing flange 21 on the outer periphery of the tip end portion are tight enough to not rotate together with the bolt to the inner diameter surface portion of the first cylindrical member 1 and can be moved in the axial direction. The second cylindrical member 2 fitted in the state,
And the outer peripheral surfaces of the tapered portions 12 of the first cylindrical member 1 are overlapped with each other, and one end of the second cylindrical member 1 is overlapped with the outer peripheral surface of the tapered portion 12. 2
A third configuration in which the cylindrical member 2 comes into contact with the pushing flange 21
It consists of a combination with a cylindrical material 3.

As an example, a female screw 22 having a nominal diameter of 16 mm is cut on the inner diameter surface of the second cylindrical member 2, and a corresponding bolt 5 is screwed into the female screw 22 (FIGS. 4 and 5).

The outer diameter of the substantially rear half portion 13 of the first cylindrical member 1 is slightly larger than the outer diameter of the pushing flange 21 of the second cylindrical member 2 and the outer diameter of the third cylindrical member 3. I have. As shown in FIGS. 4 and 5, the one-way screw fixing nut is fastened to the member 6 to be fastened (FIG. 4 and FIG. (It should be considered as a wall.).

In consideration of the above-mentioned usage, the member to be fastened 6
The diameter of the mounting hole 60 of the second cylindrical member 1 is
It is manufactured to be almost the same as the outside diameter of No. 3 (possibly as small as possible). More preferably, as shown in FIG. 1, the outer peripheral surface of the rear half portion 13 of the first cylindrical member 1 is crushed when driven into the mounting hole 60 of the member 6 to be fastened to such an extent that it does not rotate together with the bolt 5. An unevenness processing 14 for generating a frictional force corresponding to the fitting is performed (the invention according to claim 2). FIG. 1 shows, as an example of the concavo-convex processing 14, a scoring processing that forms a small jagged shape (triangular wave shape) in the circumferential direction and forms a streak shape parallel to the axial direction, but is not limited thereto. Knurling or other so-called rough surface processing may be used.

In the one-way screwing nut of the present invention, which is driven into the mounting hole 60 of the member 6 to be fastened as described above, the dead-end flange 11 of the first cylindrical member 1 comes into close contact with one surface of the member 6 to be fastened. (See FIGS. 4 and 5).

In the one-way screw fixing nut of the present invention, the outer peripheral surface of the rear half portion 13 of the first cylindrical member 1 does not co-rotate with the bolt 5 into the mounting hole 60 of the member 6 to be fastened as described above. Dead end flange 1 fitted tightly
At the stage where 1 is stopped at a position where it hits one surface of the member 6 to be fastened, as shown in FIGS. 4 and 5, a member to be attached to the member 6 to be fastened, for example, an aluminum frame of a light-transmitting plate with an aluminum frame Is attached to the dead end flange 11.
Is applied with the center of the bolt hole 70 aligned. Then, the bolt 5 is screwed into the female screw 22 of the second cylindrical member 2 through the bolt hole 70, and fastening is performed (FIG. 4).

Thus, the second cylindrical member 2 is gradually moved toward the front side (head side of the bolt) by the tightening force of the bolt 5 screwed into the female screw 22 of the second cylindrical member 2 of the one-way screwing nut. Attracted to Inevitably, the second
In the form of being pushed by the pushing flange 21 of the cylindrical member 2, the third cylindrical member 3 is also unitedly attracted, and the front end thereof finally hits the other side surface of the member 6 to be fastened as shown in FIG.
Since both surfaces of the member to be fastened 6 are sandwiched and supported between the dead end flange 11, the purpose of screwing the member to be fastened 6 and the mounting member 7 is completely achieved.

As described above, since the purpose of fastening is achieved by screwing the bolt 5 into the female screw 22 of the second cylindrical member 2, the one-way screw fixing nut of the present invention is Are not rotated together with the bolt 5. As a specific means, the Saddle-eye relationship between the inner peripheral surface of the first cylindrical member 1 and the outer peripheral surface of the second cylindrical member 2 fitted thereto is as follows.
It is fitted so tight that it does not co-rotate and that axial movement produces as much friction as possible.

As an example, in the case of FIG. 1, the outer peripheral surface of the second cylindrical member 2 is tight to the inner peripheral surface of the first cylindrical member 1 so as not to rotate together with the bolt, and is movable in the axial direction. Unevenness processing 23 for fitting to a certain degree is performed.
In FIG. 1, as an example, the concavo-convex processing 23 also has a small jagged shape (triangular wave shape) in the circumferential direction and has a line-shaped line parallel to the axial direction, but is not limited thereto. Knurling or other so-called roughening may be used (the invention according to claim 3).

The one-way screw nut for screwing the member 6 to be fastened and the mounting member 7 with the bolt 5 as described above has a tip of a female screw 22 cut on the inner diameter surface of the second cylindrical member 2. The part is provided with two locking pieces 41 having the same height as the screw thread and being arranged at right angles to the axis in a 180 ° symmetric arrangement (the invention according to claim 4). Therefore, when the bolt 5 is screwed in a depth necessary and sufficient for screwing the fastened member 6 and the mounting member 7 as described above,
The screw thread at the tip of the bolt 5 is exactly
As a result, a large frictional force is generated due to the difference in the screw pitch, and the locking action is achieved.

In the case of FIG. 1, the loosening stopper 41 is formed on the inner diameter of the ring 4, and the ring 4 forms an annular groove at the tip of the female screw 22 on the inner surface of the second cylindrical member 2. , Which are fitted in the grooves.

[0021]

According to the present invention, there is provided a one-way screw-fastening nut according to the present invention, in particular, a bolt and a nut, which are used when a soundproof panel is mounted on a rectangular pipe support constituting a soundproof wall for a road from the road side. It has a function and configuration suitable for use in fastening and mounting.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing components of a one-way screw nut according to the present invention.

FIG. 2 is a sectional view of a one-way screw fixing nut according to the present invention.

FIG. 3 is a perspective view of a one-way screw nut according to the present invention.

FIG. 4 is a sectional view showing a use state of the one-way screw nut according to the present invention in a state before fastening.

FIG. 5 is a cross-sectional view showing a use state of the one-way screw nut according to the present invention in a state where fastening is completed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Dead end flange 12 Taper part 1 1st cylindrical material 21 Push flange 2 2nd cylindrical material 3 3rd cylindrical material 22 Female screw 13 Back half 6 Fastened member 60 Mounting hole 14 Irregular processing 23 Irregular processing 41 Loose stop piece

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Yoichi Kadoya 3-46-13 Kobita, Adachi-ku, Tokyo (72) Inventor Yoshiaki Shiniwa 3-16-8 Bunka, Sumida-ku, Tokyo (72) Inventor Ryoichi Shirayama 2-1-8 Hirai, Edogawa-ku, Tokyo F-term (reference) 3J025 AA07 BA05

Claims (4)

[Claims] A first end having a dead-end flange on an outer periphery of a base end and a tapered portion having a tapered shape on an outer peripheral surface of a substantially front half portion;
A second cylindrical member having a cylindrical material and a pushing flange on an outer periphery of a tip end portion, which is tightly fitted to the inner surface of the first cylindrical member so as not to co-rotate with a bolt and capable of moving in the axial direction; The first and second cylindrical members are commonly fitted to the outer peripheral surface of each of the first and second cylindrical members, one side of the inner diameter surface overlaps the outer peripheral surface of the tapered portion of the first cylindrical member, and one end is A third cylindrical member configured to be in contact with a push flange of the second cylindrical member, wherein an inner diameter surface of the second cylindrical member is female-threaded, and an outer diameter of a substantially rear half of the first cylindrical member is The outer diameter of the push flange of the second cylindrical member and the outer diameter of the third cylindrical member are larger than the outer diameter of the first cylindrical member. The bolt is tightly fitted so that it does not rotate together with the Of stopped at a position impinging on one side, the second cylindrical member is attracted to the front side by the clamping force of the bolt screwed into the female thread of the second cylindrical member,
The third cylindrical material is also drawn by the pushing flange,
A one-way screwing nut, characterized in that the front end thereof abuts against the other side surface of the member to be fastened and sandwiches and supports the member to be fastened between the dead-end flange. 2. An outer peripheral surface of a substantially rear half portion of a first cylindrical member is provided with a concave-convex processing for being fitted into a mounting hole of a member to be fastened so as to be crushed and fitted tightly so as not to rotate together with a bolt. The one-way screw fixing nut according to claim 1, characterized in that: 3. An outer peripheral surface of the second cylindrical member is provided with an uneven surface so as to fit tightly to the inner peripheral surface of the first cylindrical member so as not to co-rotate with the bolt and to be able to move in the axial direction as much as possible. The one-way screw fixing nut according to claim 1, wherein the nut is provided. 4. A female screw cut on the inner diameter surface of the second cylindrical member is provided with a locking member having the same height as the screw thread and a right angle to the axis at the tip. The one-way screw fixing nut according to claim 1.