JPS6023549Y2 - Natsuto - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nut, and particularly to a nut used for fixing a stud bolt to a member via the bolt to another member.

Conventionally, when attaching a synthetic resin panel to the front grill of an automobile, a nut was welded to the front grill body, and the panel was attached to the grill by tightening a bolt to the nut.

This mounting method has the disadvantage that even if the panel expands due to the influence of heat, the panel will deform into a wavy shape because there is no place for the strain to escape due to the force of strong tightening of the bolts.

For this reason, an attempt was made to make the bolt mounting holes in the panel long holes and provide seats made of synthetic resin so that they could easily slide in the direction of the long holes, but this had no effect if the bolts were tightened strongly.

Therefore, an object of the present invention is to provide a nut which is designed so that the tightening force does not exceed a certain level.

In order to achieve this objective, the present invention proposes to fix a stud bolt to a member to be attached, and to fix another member, such as a panel, to this member via the bolt. A nut is used, and each of the two opposing sides of the nut is integrally connected to the bottom of the nut at its base, and the portion other than the base is formed by branching from the nut body by a roughly mouth-shaped slit. The diameter of the bolt insertion hole at the bottom of the nut is approximately equal to the outer diameter of the bolt, and the inner surface of the tip of each holder extending to the nut head has a diameter smaller than the diameter of the hole at the bottom of the nut. It is characterized by being sloped inward toward the head so as to form a shape, and being smoothly formed on the inner wall surface of each holding part.

With this arrangement, panel installation is accomplished by pushing nuts against bolts.

This prevents the nut from fixing the panel to a mating member, such as the front grille, with excessive force, and even if the panel thermally expands, the elongated holes provide a free escape route, eliminating waving deformation.

In addition to this, the installation process eliminates the need to turn a nut, which has the effect of significantly improving work efficiency compared to the conventional method.

According to the embodiment of the present invention, by forming the nut head into a lid shape, it is possible to cover the bolt tip and improve the appearance, and also to eliminate the danger caused by the protrusion at the bolt tip.

In particular, it is preferable that the nut be made of synthetic resin.

The nut of the present invention can be removed by rotating it in the same way as a normal nut.

Embodiments of the nut of the present invention will be described below with reference to the drawings.

A nut 1 of the present invention with a sealed head is shown in FIGS. 1 and 2, and this nut is made of synthetic resin.

The nut 1 is hollowed in the shape of a normal hexagonal nut, and its two opposing sides have a root portion at the bottom of the nut that is integrally connected to the nut body, and another portion that extends to the nut head and is branched from the root of the nut. A slit 3 with a certain width is provided between the holder and the nut body, and this makes it difficult to insert the screw. The holding part is made to be able to expand outward.

The holding part 2 is shaped like a figure eight so that the inner surface of the tip extending to the nut head forms a hole diameter smaller than the diameter of the insertion hole 4 at the bottom of the nut.

The outside of this holding part 2 is made to have the same angle of inclination as the inside surface or more, so that it maintains the shape of a hexagonal nut even if the holding part 2 is expanded outward when inserting a bolt. It is preferable that the

A flange 5 is provided at the bottom of the nut and serves as a washer for the nut.

It is preferable that the diameter of this flange is made slightly smaller than the size of the counterbore of the member to be attached, for example, the panel member, to provide a margin for escape when the panel member expands.

The screw insertion hole at the bottom of the nut is provided with an outwardly expanding portion 6 to facilitate insertion of the screw.

As shown in FIG. 3, the nut 1 of the present invention is used to fix another member 12 (for example, a panel member) to a member 11 (for example, a front grill of an automobile) to which a stud bolt 10 is fixed.

To fix the member 12 to the member 11, the operator must tighten the nut 1.
The work of simply pushing the bolt into the stud bolt 10 is intimidating.

When the nut 1 is pushed into the bolt 10, the holding parts 2, 2, which were inclined inward in an eight-shape, are raised up, and the reaction force causes the holding parts 2, 2 to clamp the thread of the bolt 10, whereby the member 12 is It is fixed to the member 11.

This tightening force is not excessively strong like when tightening ordinary bolts and nuts, and if a stopper 16 is provided at the outer edge of the member 12 as shown in FIG. 3, a gap S can be left between the two members. Can be done.

On the other hand, when tightening with bolts or nuts, member 12
It will bend the.

Therefore, an unnecessarily strong tightening force is eliminated, and if the member 12 is formed with a long hole 13 as shown in FIG. 4, it can be moved in the direction of the long hole, that is, in the Y direction.

This movement is not limited to the Y direction, but can also be made in the X direction by making the diameter of the flange 5 smaller than the diameter of the counterbore 14.

In the nut of the present invention, in addition to the tip of the holding part 2 acting as a screw, the sharp thread of the bolt makes minute scratches on the inner wall of the holding part, which greatly increases the locking effect in the nut removal direction. It functions as a nut without having a screw shape.

Further, when the nut head is covered, the tip of the bolt is smoothed and the appearance is favorable, but the nut head does not need to be covered.

According to the present invention, the tightening force does not become excessive, and the fixing operation does not require rotation of the nut, thereby improving work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional side view of the nut of the present invention, Fig. 2 is a partially sectional side view of the nut as seen from arrow A in Fig. 1, and Fig. 3 is a partially sectional side view of the nut of the present invention.
The figure is a sectional view showing how the nut is used, and FIG. 4 is an explanatory view showing the action of the nut. 1... Nut, 2... Holding part, 3...
...Slit, 4...Insertion hole, 5...
...Flange, 10...Stud bolt, 11
.... Member, 12... Other member.

Claims (3)

[Scope of utility model registration request] (1) A nut used for fixing another member to a member to which a stud bolt is fixed via the bolt, and each of the two opposing sides has a base that is integrally connected to the bottom of the nut. The portion other than the base is provided with a holding portion formed by branching from the nut main body by a substantially mouth-shaped slit, and the hole diameter at the bottom of the bolt insertion hole of the nut is formed approximately equal to the outer diameter of the bolt. At the same time, the inner surface of the tip of each holding part extending to the nut head is inclined inward toward the head so as to form a hole with a smaller diameter than the hole diameter at the bottom of the nut, and the inner wall surface of each holding part is A nut characterized by being formed smoothly. (2) The nut according to claim (1), wherein the head of the nut is formed into a lid shape that terminates the insertion hole. (3) The nut according to claim (1) or (2) of the utility model registration, wherein the nut is made of synthetic resin.