JPH0156851B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a box body such as an inner box or an outer box used for a refrigerator, a storage case, etc., and particularly relates to a box body such as a side plate,
The purpose is to facilitate the seaming process and improve the seaming strength when connecting upper and lower plates by seaming.

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

Reference numeral 1 is a box-shaped main body made of a metal painted steel plate or plate, with a side plate 2 bent into a U-shape, an upper part,
It consists of lower plates 3 and 4. Reference numeral 5 designates first seaming flanges provided at the upper and lower ends of the side plate 2, and reference numeral 6 designates a first front flange forming the front edge of the main body 1. 7 is up,
8 with the second seaming flange provided on the lower plates 3 and 4.
is again the 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 wound around the side plate 2. The first seaming flange 5 has a mold receiving surface 11 bent outward from the side plate 2 at a substantially right angle, and a seaming surface 11 bent from the mold receiving surface 11 so as to extend parallel to the side plate 2 again. 12, and a seaming guide piece 13 that is inclined inward at the tip of the seaming portion 12.

Next, the assembly situation in the above configuration will be explained. Place the mold receiving surface 11 of the side plate 2 on the mold A, press fit the upper plate 3 or the lower plate 4 into the mold receiving surface 11 via the elasticity of the seaming guide piece 13 and the seaming part 12,
Set both plates 2 and 3 as shown in FIG. Thereafter, the mold B is moved in the direction of arrow M, and both seaming flanges 5 and 7 are seamed as shown in FIG. To briefly explain this seaming process, the seaming guide piece 13 is bent downward by the circular arc portion 14 of the mold B, and the seaming guide piece 13 is bent downward to the right side of the second seaming flange 7 (FIG. 5).
Then, the second seaming flange 7 and the curl piece 12 are bent together and seamed into the shape shown in FIG. The protruding pieces 9 and 10 of the first and second front flanges 6 and 8 are then overlapped 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 the above embodiment, the upper and lower plates are fixed to the inverted U-shaped side plates, but the present invention is not limited to this, and the box body may be constructed by fixing the bottom plate to the side plates in the shape of an opening.

As described above, the present invention comprises a side plate having a first seaming flange, and either or both of an upper plate and a lower plate having a second seaming flange, and the first seaming flange is A seaming part is provided with a mold receiving surface bent outward at a substantially right angle from the side plate, and a seaming part extending from the mold receiving surface again substantially parallel to the side plate and having a seaming guide piece at its tip inclined inward. The second seaming flange is placed on the mold receiving surface of the first seaming flange, is shorter than the seaming guide piece, and is substantially parallel to the seaming part, and the seaming guide piece is connected to the seaming guide piece. It is sandwiched between the upper and lower plates and the second seaming flange, and the mold receiving surface and seaming guide piece allow seaming to be performed by pressing in the vertical direction and performing roll-type seaming. Since this is not necessary, the equipment is simple and the working time can be shortened.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a box showing an embodiment of the present invention, Fig. 2 is a -' line in Fig. 1, and Fig. 3 is a
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 seaming flanges, 6,8...First and second front flanges, 11...Mold receiving surface,
12... Sealing part, 13... Sealing guide piece.

Claims (1)

[Claims] 1 a side plate 2 having a first seaming flange 5;
Upper plate 3 and lower plate 4 having second seaming flange 7
The first seaming flange includes a mold receiving surface 11 placed on the mold A bent outward at a substantially right angle from the side plate, and a mold receiving surface 11 placed on the mold A bent outward from the side plate, and A seaming part 12 extending substantially parallel to the side plate and having a seaming guide piece 13 inclined inward at its tip, the second seaming flange being a mold receiver of the first seaming flange. It is placed on the surface and is shorter than the seaming guide piece and is approximately parallel to the seaming part.
The seaming guide piece and seaming portion of the first seaming flange and the seaming guide piece of the second seaming flange are provided with a circular arc portion and a straight portion that abut the tip of the seaming guide piece. Manufacturing a box body by pressing with a mold and aligning the seaming part with the seaming guide piece of the second seaming flange, and then bending both seaming guide pieces and the seaming part. Method.