JPH0242345Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a structure for joining and fixing metal plates when forming refrigerator door frames, etc.

(b) Conventional technology Conventionally, metal plates are connected and fixed when forming a door frame by providing through holes 3a and 4a in metal plates 1a and 2a, as shown in FIGS. 12 to 14. This was accomplished by aligning and overlapping the through holes 3a, 4a, passing the rivets 5a through the through holes 3a, 4a, and then caulking them.

(c) Problems to be solved by the invention However, when joining and fixing metal plates using the above-mentioned rivets, the head of the rivet protrudes from the top surface of the metal plate. There were problems with parts getting stuck and the rivet heads getting in the way.

Furthermore, when connecting and fixing using rivets, there may be a difference in the diameter of the rivet and the diameter of the rivet holes provided in both metal plates. In this case, there is a problem in that even after the two metal plates are joined, they may shift by the difference (play) between them.

In particular, when this bonding and fixing structure is used to bond and fix metal plates to form the corners of a refrigerator door frame, there is a problem that when the packing is attached, a gap is created near the rivet head, making it impossible to maintain sufficient airtightness. It was hot.

This idea was made in view of the above points, and provides a structure for connecting and fixing metal plates that does not leave any protrusions on the upper surface of the metal plate that could cause other parts to get caught, and has a strong bonding strength. It is something. moreover,
To provide a joining and fixing structure of metal plates, which makes it possible to provide a frame having a structure that maintains sufficient airtightness when packing is used as a frame of a refrigerator door.

(d) Means for solving the problem This idea overlaps the upper metal plate at the stepped part of the lower metal plate, so that the upper metal plate engages the lower metal plate and both plates This is a bonding and fixing structure of metal plates that is constructed by narrowing down the overlapping parts of the metal plates.

The details are that two metal plates are overlapped and fixed together, and the upper metal plate has a tongue piece that bends downward, and the lower metal plate has a tongue piece that bends downward. A stepped portion is formed on which the upper metal plate is overlapped, and a fitting hole is provided in a part of the stepped portion into which the tongue piece of the upper metal plate is inserted when both metal plates are overlapped. When the tongue piece is inserted into the insertion hole, it is bent so as to wrap around the edge of the insertion hole, and at a part of the overlapped portion of both plates, both plates are overlapped and narrowed so as to protrude downward. This is a metal plate bonding and fixing structure characterized by being formed by processing.

(E) Effect Both metal plates are overlapped at the step part, and the top surfaces of both metal plates are flush.

The tongue piece of the upper side metal plate fits into the insertion hole of the lower side metal plate and is bent, so that the upper side metal plate bites the lower side metal plate and connects both metal plates.

The parts where the two plates overlap are narrowed so that they protrude downward, fixing the positions of both plates.

(f) Examples This invention will be explained in detail with reference to examples shown in FIGS. 1 to 11, but the invention is not limited thereby.

FIG. 1 shows a state in which two metal plates 1 and 2, for example colored steel plates (painted steel plates), are bonded and fixed, and FIG. 2 is a view cut along the line A-A.

A stepped portion 6 is formed on the lower metal plate 2, and when the upper metal plate 1 is superimposed on the stepped portion 6, the upper surfaces of the metal plates 1 and 2 are flush with each other. Furthermore, a fitting hole 4 is provided in this stepped portion 6. On the other hand, the upper metal plate 1 is provided with a tongue piece 7 that is bent downward at the end facing the insertion hole 4 when stacked together.

Here, the metal plate 1 overlaps the metal plate 2 at its stepped portion 6, and the tongue piece 7 of the metal plate 1 overlaps the metal plate 2.
It is fitted into the fitting hole 4 and bent so as to wrap around the fitting hole edge 8. 9 is the bent portion.

Further, both metal plates 1 and 2 are overlapped and narrowed so as to protrude downward at the overlapped portion. 10 and 11 are narrowed portions of both metal plates 1 and 2, respectively.

This invention will be explained in more detail below along with manufacturing examples.

First, the upper metal plate 1 is attached to the lower metal plate 2.
The stepped portion 6, which will be the overlapping portion with the above, is formed by press bending. Next, a fitting hole 4 into which the tongue piece 7 is fitted is provided in the stepped portion 6 by, for example, press punching. In addition, the stepped portion 6 and the insertion hole 4
may be formed by simultaneously performing the step-down process and the punching process in one press (see Fig. 4).On the other hand, the corner opposite to the above-mentioned insertion hole 4 of the overlapping part of the metal plates 1 on the upper side Then, the tongue piece 7 is formed by, for example, press punching (see FIG. 3). Next, this tongue piece 7 is bent downward at a substantially right angle.

Here, as shown in FIGS. 5 to 10, the tongue piece 7 is inserted into the insertion hole 4, and both metal plates 1 and 2 are placed in a predetermined position and overlapped. Next, while maintaining this state, the tongue piece 7 is bent so as to wrap around the through-hole edge 8. Furthermore, the overlapping portion of both plates is drawn downward into a cylindrical shape. Note that the narrowing portions, that is, the forming positions of the narrowing portions 10 and 11 are slightly offset from the tip of the tongue piece 7 that is bent so as to wrap around the through-hole edge 8.

In this metal plate coupling and fixing structure, the metal plate 1 engages the metal plate 2 with its tongue piece 7 through the insertion hole 4 of the metal plate 2. Therefore, a clamping action acts to prevent the two metal plates 1 and 2 from coming apart, and the bonded state is reliably maintained.

Both metal plates 1 and 2 are overlapped at the overlapped portion and are narrowed downward. Therefore, the fixed state is reliably maintained against horizontal displacement or rotation of both metal plates 1 and 2.

The overlapping portion of the lower metal plates 2 is stepped, so that when the two metal plates 1 and 2 are overlaid, that is, in a bonded and fixed state, their upper surfaces are flush.

From the above, in this joint and fixing structure, both metal plates 1,
The bite by the tongue piece 7 acts on the withdrawal of 2.
For displacement or rotation in the plane direction, the narrowing section 10,
11 acts to ensure that the fixed state is maintained.
Furthermore, since there are no protrusions or protrusions on the upper surfaces of the metal plates 1 and 2 and they are flush, no trouble will occur when attaching other parts.

In addition to the above embodiment, there is a metal plate joining and fixing structure in which the tongue piece 7' is formed large, and the tongue piece 7' is added to both metal plates 1' and 2', and three pieces are stacked and narrowed. (See Figure 11).

Further, the narrowing portions 10 and 11 may have a shape that penetrates through the bottom thereof.

Note that if this structure is used in areas where airtightness must be maintained, such as the back corner of a refrigerator door, the head of a rivet or other protrusions may occur on the top surface of the metal plate when attaching parts such as packing. Since there is no airtightness, airtightness is ensured and this is particularly effective.

(G) Effects of the invention This invention not only provides a secure connection and fixing structure for two metal plates, but also allows the top surface of the metal plates to be flush with each other, and since no protrusions remain on the top surface of the metal plates, other parts cannot be easily connected. A metal plate joining and fixing structure can be obtained that does not hinder the installation of metal plates.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of this invention, Fig. 2 is a perspective view of the main part including a cross section cut along A-A, and Fig. 3 is a main part of the upper metal plate before it is connected and fixed. FIG. 4 is a perspective view of the main part of the lower metal plate before it is joined and fixed, FIG. 5 is a perspective view of the main part showing the state before the two metal plates are overlapped, and FIG. B
- A cross-sectional view cut at the B-B section, FIG. 7 is a perspective view of the main parts showing the state in which two metal plates are overlapped, FIG. 8 is a cross-sectional view taken at the C-C section, and FIG. 9 is a A perspective view of the main parts showing a state in which two metal plates are bonded and fixed, Fig. 10 is a sectional view taken along the line D-D, and Fig. 11 is a perspective view of the main parts including a cross section showing another embodiment. , FIG. 12 is a partial perspective view showing the structure of a conventional example, FIG. 13 is a vertical sectional view of the main part thereof, and FIG.
The figure is a perspective view showing an example in which a conventional example is used in a frame corner portion of a refrigerator door. 1, 2...metal plate, 4...fitting hole, 6...step part, 7...tongue piece, 8...through hole edge, 9...bent part,
10, 11...Narrowing down section.

Claims (1)

[Scope of utility model registration request] It has a structure in which two metal plates are overlapped and fixed together, and the upper metal plate is provided with a tongue piece that bends downward at the end, and the upper metal plate is attached to the lower metal plate. A stepped portion to be overlapped is formed, and a fitting hole is provided in a part of the stepped portion into which the tongue piece of the upper metal plate is inserted when both metal plates are overlapped, and the tongue piece is inserted into the hole. When inserted into the hole, it is bent so as to wrap around the edge of the insertion hole, and a part of the overlapped portion of the two plates is drawn so that both plates overlap and protrude downward. A metal plate bonding and fixing structure featuring: