JP2500069B2 - Steel plate panel products welded with weld nuts - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to welding a weld nut to a steel plate panel member such as a steel plate panel of an automobile body.
The present invention relates to a contacted steel plate panel product .

[0002]

2. Description of the Related Art A conventional weld nut in which a plurality of welding projections are arranged so as to project from a seat surface is
It is widely used in the automobile industry, home appliance industry, etc., but in the case of conventional weld nuts of this kind, the melt of the welding projection flows into the seat surface during welding, making it difficult for the nut body to adhere to the steel plate panel. Therefore, there is a problem that a gap reaching the screw hole is generated between the steel plate panel and the nut body, and the sealing property is lost. As a solution to such a problem, as disclosed in Japanese Utility Model Laid-Open No. 55-122983, a bearing surface is provided with an annular groove centering on a screw hole, and Japanese Utility Model Laid-Open No. 2-54914 is disclosed. As can be seen, it has been proposed to provide a groove located inside each of the welding projections, but an annular groove or an independent groove prevents the melt of the welding projection from flowing out to the seat surface. Even in this case, there is still a possibility that water may get wet due to poor flatness of the contact surface between the seat surface and the steel plate panel.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above problems and provides excellent waterproof performance at a contact portion between a seat surface and a mounting member when welding to a panel member such as a steel plate panel for automobiles. Excellent sealing function that can be obtained
Weld nuts are to try to provide welded steel sheet panel products .

[0004]

A steel sheet panel welded with a weld nut according to the present invention which has solved the above-mentioned problems.
The product has a screw hole in the center and the outer peripheral part of the seat surface
Nut book with multiple welding projections
Located on the body seat, inside each welding projection
Recessed to receive the melt of each welding projection
A groove and the screw hole is surrounded from a distance inside the groove.
Shorter than the welding projections arranged in
Seal ring with a chevron-shaped cross-section with a sharp tip
Weld nut with a raised ridge
The seat surface and the annular ridge for sealing are the panels for the material
Panel with annular ridge for sealing without being welded to the member
The above-mentioned melt is applied so that an annular seal part is cut into the member.
It is characterized by being welded and integrated with a contact projection .

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the illustrated embodiments. Reference numeral 1 denotes a quadrangular nut body, and welding projections 3 projecting more than the seating surface 2 are provided at four corner portions thereof. Reference numeral 4 denotes an annular or rectangular annular ring ridge for sealing formed on the seat surface 2 of the nut body 1 around the screw hole 5, and the annular ridge for sealing 4 is formed by the projection 3 for welding. It is short and has a chevron cross section with a sharp tip so that it can easily bite into the steel plate panel during welding.

Reference numeral 6 denotes a concave groove which is provided outside the sealing annular ridge portion 4 of the seat surface 2 so as to be located between each welding projection 3 and the sealing annular ridge portion 4. The groove 6 is immediately inside each of the welding projections 3 and is provided independently so that both ends thereof are opened to the outside at the end edges of the nut main body 1.

In the embodiment, the nut body 1 has a quadrangular shape and the welding projections 3 are provided at the four corners in a leg shape. However, the nut body 1 has a circular shape or a polygonal shape, and a suitable number of pieces are provided. A projection for welding may be provided, and in this case, the concave groove 6 may be continuous in an annular shape.

Such a weld nut is made of steel for automobiles.
When the welding machine is energized and pressurized by a conventional method with the nut body 1 set on the upper surface so that the centers of the screw holes 5 are aligned with the holes 11 of the steel plate panel member 10 such as a plate panel, as shown in FIG. A panel member 1 made of a steel plate through the steps shown in FIG.
It is welded and integrated with 0. Even if the melt of the welding projection 3 melted at the time of welding tries to flow into the inside of the seat surface 2, the groove 6 for receiving the melt of the welding projection 3 is formed inside the welding projection 3. Therefore, the melt can be prevented from flowing into the concave groove 6 and entering between the seat surface 2 and the panel member 10 made of a steel plate , so that the nut body 1 is not tilted or displaced, and the portions of the plurality of welding projections 3 are prevented. At
It is welded to the panel member 10 made of a steel plate .

When the nut body 1 is crimped to the steel plate panel member 10 and the welding projection 3 is melted as shown in FIG. 3, it is formed on the seat surface 2 around the screw hole 3. Sealing annular ridge 4 is made of steel plate
Contact the panel member 10 of, pointed the contact area is small
From the top of the tip , as shown in FIG. 4, a panel member 1 made of a steel plate.
Welding projection 3 with biting 0 evenly
Welded only in and formed by this bite
Due to the annular seal portion, there is no room for a gap between the panel member 10 made of steel plate and the sealing annular ridge portion 4, and this portion exhibits a reliable sealing function. In particular,
The ring-shaped ridge part 4 for sealing has a cutting point whose top is sharpened.
Since it has a face-mountain shape, the pointed part is a steel plate panel
V can be easily applied to the member 10 by applying pressure when energizing by a welding machine.
It digs into a groove and exerts an excellent effect.

Further, the nut main body 1 is formed into a square shape, and the welding projections 3 are provided at the respective corners thereof, and the concave groove 6 is open to the outside at the end of the nut main body 1 inside the respective welding projections 3. It is preferable to provide them independently as the state because the surplus of the melt of the welding projection 3 is washed away to the outside.
Yes.

[0011]

As is apparent from the above description, the present invention has a sealing annular ridge portion in which a top portion shorter than a projection for welding is formed at a pointed portion on a seat surface of a nut body,
A nut body is provided between the welding projections and the ring-shaped ridge portion for sealing, and a concave groove for receiving the melted material of the welding projections is provided so that the nut body is a mounting member.
The annular ridge for sealing against the steel plate panel member that is
When the welding performance is extremely high, the
It will be firmly welded and integrated in the injection, and since the annular ring ridge for sealing and the concave groove can be manufactured without basically changing the conventional nut pressing method, it can be mass-produced at low cost and the usual welding means. There are many advantages, such as the ability to use Therefore, the present invention is a steel plate panel welded with a weld nut that solves the conventional problems.
The benefits brought to the industry as products are enormous.

[Brief description of drawings]

Is a partially cutaway perspective view showing an example of a weld nut definitive to the present invention; FIG.

FIG. 2 is a partially cutaway front view showing an initial state of welding according to the present invention.

FIG. 3 is a partially cutaway front view showing the intermediate welding state of the present invention.

FIG. 4 is an enlarged cross-sectional view of a welded portion which is a main part of the present invention.

[Explanation of symbols]

1 Nut Main Body 2 Seat Surface 3 Welding Projection 4 Sealing Ring Ridge 5 Screw Hole 6 Recessed Groove 10 Steel Plate Panel Member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Showa 57-111 (JP, U) Showahei 2-54914 (JP, U)

Claims (2)

(57) [Claims] 1. A screw hole (5) is provided at the center of the seat surface (2).
There are several welding projections (3) on the outer circumference.
Install each welding project on the bearing surface (2) of the installed nut body (1).
Located inside the projection (3),
Groove (6) for receiving the melt of the option (3) and this groove
Immediately inside (6), surround the screw hole (5) from afar.
Shorter than the welding projection (3) placed
An annular sealing ring with a chevron cross section
Attach the weld nut with the ridge (4) to the steel panel.
The seat member (2) and the sealing ring
Seal the bank (4) without welding to the panel member (10)
The ring-shaped ridge (4) that has been bitten into the panel member (10)
The welding projection so that it becomes a seal part.
A wafer characterized by being integrally welded with (3).
Steel plate panel products with welded nuts . 2. The nut body (1) has a rectangular shape, and a projection (3) for welding is provided at each corner of the nut body (1) to form a groove (6).
The weld nut according to claim 1, wherein the weld nuts are provided independently inside each of the welding projections (3).
Welded steel panel product.