JPH0451207Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a nut, and particularly to a nut that can prevent loosening during long-term use when plate materials are fixed with bolts.

[Prior art] As a conventional nut similar to the present invention, the 6th nut is similar to the present invention.
The shape shown in the figure is used.
That is, the nut has an upper piece 11 having a nut part 10 for screwing a bolt on one side through a folded part 13, and a lower piece 12 on the other side, and one resin plate is attached to the nut. Additionally, one resin plate was arranged in parallel on the outside of the lower piece 12 and was screwed onto it with bolts.

Furthermore, according to Utility Model Application No. 113815/1984, as shown in FIG. This nut is used to screw the lower piece 23 provided thereon with a mounting bolt at the overlapping portion between the ends, and is folded and molded so as to sandwich the ends of the lower piece 23 from both sides. a fixing nut 21 disposed on one side of the upper piece 22; a mounting bolt hole 27a drilled in the other piece of the upper piece 22; A folded part 24 that is folded back from the end of the piece to the misplacement side and acts to pinch the edge of the upper piece part 22, and a tab part 25 that is connected to the folded part through a thin part 26 that acts as a hinge.
and a mounting bolt hole 27 formed in the tab portion 25 are formed by integral molding of a resin material.

[Problems to be solved by the invention] However, as shown in the figure, such a conventional nut has the following problems:
The problem with the metal nut shown in FIG. 6 is that even if two plates are sandwiched together, if the plates are made of resin, they will gradually loosen over a long period of use, resulting in a decrease in the fixing force. A point occurred.

Further, in the example shown in FIG. 7, when the nut is made of resin and the plate material is clamped and fixed, even if the bolt is screwed into the nut portion, the screwed state tends to loosen.

Moreover, the clamping plates such as the upper and lower pieces have little ability to absorb errors in plate thickness against changes in plate thickness, and therefore have a weak clamping force against the plate, which prevents loosening due to long-term use. It tended to occur early.

Furthermore, when using resin materials, due to the unique properties of the resin material, the surface of the resin material gradually creeps due to the influence of the fastening pressure, causing the problem that the fastening relationship becomes loose. Ivy.

[Means for Solving the Problems] Therefore, in order to effectively solve the problems of the conventional nut, the present invention aims to improve the nut part 2.
One end portion of the upper piece portion 3 formed with is continuously curved in the board width direction to form an elastic first folded portion 6, and the other end portion of the upper piece portion 3 is formed as the first folded portion 6. Part 6
The elastic second folded part 7 is formed by continuously curving in the same direction in the board width direction, and the heights of the first folded part 6 and the second folded part 7 are set to be the same. 2
A central piece part 4 and a lower piece part 5 are formed continuous with the folded part 7 and parallel to the upper piece part 3, and the central piece part 4 and the lower piece part 5 are connected by a third folded part 8. A spring body nut is provided, and the central piece 4 and the lower piece 5
is linearly continuous with the nut part 2 in the vertical direction,
The locking nut is constructed by drilling through holes 9, 9a that are larger in diameter than the bolt to be inserted.

[Function] Accordingly, in the present invention, so that the plate material can always be pressed uniformly against the upper piece that constitutes the nut part,
Since folded parts of the same height are continuously formed on both sides in the width direction of the board, pressure is always applied elastically to the board when bolts are tightened, which makes the board strongly fixed. .

Even if the plate material is made of resin, the problem of creep due to pressure does not occur, and a stable fixed state is ensured.

[Example] Hereinafter, the present invention will be described in detail by way of an illustrative example.

The locking nut 1 according to this embodiment has a first
As shown in FIGS. 4 to 4, it is constructed using a spring elastic material made of a metal material.

That is, a thin plate-shaped spring elastic material is processed by press working, and this locking nut 1 has the following features:
An elastic first folded portion 6 formed by continuously bending one end portion of the upper piece portion 3 forming the nut portion 2 in a circular direction in the plate width direction.
and the other end portion of the upper piece portion 3 is oriented in the same direction as the first folded portion 6, and is continuously curved in the board width direction to form an elastic second folded portion 7. A central piece part 4 and a lower piece part 5 are formed in series with the second folded part 7 and in parallel with the upper piece part 3, and the central piece part 4
and a lower piece part 5 are connected to each other by a third folded part 8 to form a spring body nut, and the central piece part 4 and the lower piece part 5 have a spring body that is linearly continuous with the nut part 2 in the vertical direction. It is characterized by having through holes 9, 9a formed therein.

Further, the nut part 2 formed in the upper piece part 3 has a circular hole formed in the approximate center thereof as a fitting end circumferential part 2b into which the bolt thread part is screwed, and the circumferential edge thereof is loosely shaped. It is formed as a rising expanded portion 2a. A slide hole 2c is bored in one direction from the fitting end peripheral portion 2b which becomes the circular hole,
This is a step to accommodate the screw pitch when the screw rotates.

Further, the upper through hole 9 and the lower through hole 9a following the nut portion 2 are both larger in diameter than the diameter of the bolt to be inserted, and the portion that is screwed is only the portion of the nut portion 2. ing.

The first folded part 6 and the second folded part 7 connected to the upper piece part 3 have the same height and are continuously curved in the board width direction.
The configuration is such that the same pressure is applied uniformly to the center piece 4 from the left and right sides.

In this way, due to the presence of the folded parts 6 and 7,
It is designed to maintain its elasticity at all times.

Here, in order to assemble and use the locking nut 1 having the above structure, as shown in FIG. is brought into contact with the lower piece part 5, the bolt is inserted from the direction of the second plate material B, and is pressed and screwed into the nut part 2 via each through hole 9, 9a.

The first plate material A and the second plate material B are strongly fastened by the screw thread of the bolt, but at this time, the first folded part 6 and the second folded part 7 forcefully press the plates A and B from the left and right. Become.

Thereby, even when the plate material is used for a long period of time and is fastened, the locking nut always elastically presses the plate material.

Therefore, it is possible to effectively prevent problems such as loosening and rattling.

[Effects of the invention] As described above, in the structure of the locking nut according to the present invention, the first folded part and the second folded part are continuously curved in the plate width direction, and the first folded part and the second folded part are curved. By setting the height of the second folded part to be the same and screwing into the bolt only at the nut part, the elastic pressure is always uniformly applied to the plate material even after the bolt is tightened. Because it is in
It is possible to maintain a stable fastened state even during long-term use without causing partial deformation on the surface of the plate material.

Moreover, if the locking nut is made of a metal material, it will be able to maintain its performance against tightening pressure or temperature changes.

In addition, the creep phenomenon of parts to be fastened such as plates is followed by the creep phenomenon, thereby preventing the occurrence of loosening.

Furthermore, separate parts such as washers, which were conventionally used to prevent loosening, are no longer required.

[Brief explanation of the drawing]

Figures 1 to 4 are explanatory diagrams of the locking nut of the present invention; Figure 1 is a front view, Figure 2 is a side view, Figure 3 is a bottom view, and Figure 4 is a perspective view. be. Fig. 5 is a diagram illustrating the assembled state when the locking nut is fastened to the plate material that is the member to be fastened, Fig. 6 is a sectional view illustrating the usage state of the conventional nut, and Fig. 7 is a diagram illustrating the state in which the locking nut is used. FIG. 2 is a perspective view of the prior art. 1... Locking nut, 2... Nut part, 3
...Top piece, 4...Central piece, 5...Bottom piece, 6
...first folding part, 7...second folding part.

Claims (1)

[Scope of utility model registration request] One end portion of the upper piece portion 3 forming the nut portion 2 is continuously curved in the plate width direction to form an elastic first folded portion 6, and the end portion of the upper piece portion 3 is
It is continuously curved in the board width direction in the same direction as the folded part 6 to form an elastic second folded part 7, and the heights of the first folded part 6 and the second folded part 7 are set to be the same. At the same time, a center piece part 4 and a lower piece part 5 are formed continuous to the second folded part 7 and parallel to the upper piece part 3, and the middle piece part 4 and the lower piece part 5 are connected to a third folded part 8. The center piece 4 and the lower piece 5 have a through hole 9 which is linearly continuous with the nut part 2 in the vertical direction and is larger than the diameter of the bolt to be inserted. ，
A locking nut characterized by having a hole 9a drilled therein.