JPS6138074Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to box bodies such as inner boxes or outer boxes used for refrigerators, storage cases, etc.
It is concerned with the reinforcement structure of the corner part when connecting the upper and lower plates etc. by curling or caulking.

Conventionally, in the case of products formed by curling, caulking, etc., each corner was reinforced with L-shaped metal fittings, but this required separate metal fittings, and the positioning of the metal fittings, welding, etc. were troublesome. Ta.

The purpose of this invention is to extend the front flanges of the side plates, upper and lower plates, overlap each other, and fix them by spot welding, etc., thereby making the structure simple and easy to manufacture. There is.

An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a box body formed from a metal pre-painted or pre-coated board, which consists of a side plate 2 bent into a U-shape, and upper and lower plates 3 and 4. 5 is side plate 2
The first crimping flange provided at the upper and lower ends of the 6
is a first front flange forming the front edge of the main body 1; 7 is a second caulking flange provided on the upper and lower plates 3 and 4, and 8 is also a second front flange. Projections 9 and 10 are formed by extending the ends of the first and second front flanges 6 and 8, and have lengths such that they overlap each other when the upper and lower plates 3 and 4 are caulked to the side plate 2. The first crimping flange 5 includes a mold receiving surface 11 bent outward from the side plate 2 at a substantially right angle, and a curled piece 12 bent from the mold receiving surface 11 so as to extend parallel to the side plate 2 again. At the tip of this curled piece 12, a leading piece 13 is provided which is inclined inward.

Next, the assembly situation in the above configuration will be explained. The mold receiving surface 11 of the side plate 2 is placed on the mold A, and the upper plate 3 or the lower plate 4 is press-fitted into the mold receiving surface 11 through the elasticity of the leading piece 13 and the curling piece 12, as shown in FIG. Set both plates 2 and 3 as shown.
Thereafter, the mold B is moved in the direction of the arrow M, and both the crimping flanges 5 and 7 are crimped as shown in FIG. A simple explanation of this caulking process is as follows:
The leading piece 13 is bent downward by the rounded part 14 of the mold B to form the second crimping flange 7.
The second crimping flange 7 and the curled piece 12 are then bent together to form the second crimping flange 7 and the curled piece 12.
It is caulked into the shape shown in the figure. And the protruding pieces 9, 10 of the first and second front flanges 6, 8
are polymerized and spot welded 15 to complete the assembly. Note that 16 is a plate holder that guides the vertical movement of the mold B and also holds down both plates 2 and 3.

In this configuration, the protruding pieces 9 and 10 of the front flanges 6 and 8 are overlapped and spot welded 14 is performed, so that unlike the conventional L-shaped reinforcing pieces, the welding 14 can be performed continuously with the caulking process. Therefore, productivity can be improved.

As described above, the present invention includes a side plate that is bent into a substantially U-shape and has a first crimping flange such as curling at the upper and lower ends, and a first front flange, and a second crimping flange. an upper plate and a lower plate each having a flange and a second front flange, forming protruding pieces that overlap each other at the ends of the first and second front flanges; It is fixed by welding or the like and the first and second crimping flanges are crimped, so there is no need for a separate reinforcing piece as in the past, and productivity can be improved.
In addition, since the protruding piece itself corresponds to the remaining side end portion of the first and second crimping flanges when trimming the material, it is economical because it does not require a large amount of raw material when cutting the material. .

[Brief explanation of the drawing]

Figure 1 is a perspective view of a box showing an embodiment of the present invention, Figure 2 is a -' line in Figure 1, and Figure 3 is a perspective view of a box showing an embodiment of the present invention.
4 is an exploded perspective view of essential parts, and FIG. 5 is a sectional view showing the crimping process. 2...Side plate, 3...Top plate, 4...Lower plate, 5,7
...First and second caulking flanges, 6, 8...
First and second front flanges, 9, 10... protruding pieces.

Claims (1)

[Scope of utility model registration request] It is bent into a substantially U-shape, has a first crimping flange such as curling at the upper and lower ends, and has a side plate having a first front flange, a second crimping flange, and a second crimping flange. consisting of an upper plate and a lower plate having two front flanges, and forming protruding pieces that overlap each other at the ends of the first and second front flanges,
A box body for a refrigerator or the like, which is formed by fixing these protruding pieces together by welding or the like and crimping the first and second crimping flanges.