JPS59195082A - Metallic box body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

B) Industrial Application Field The present invention is a method of bending a flat coated steel plate to form a metal box S which constitutes an outer box of a refrigerator or the like. 11 and 16, the corner of the outer box C of a refrigerator or the like using conventionally painted steel plate has a front flange (11
A notch (2) is provided in (2) and a stepped part (3) is formed around the notch, and between the stepped part and the notch (2), a part flush with the front flange (11) is formed. A corner piece (4) made of synthetic resin with the shape of

[2] Then, simply attach the adjacent front flanges (1) to each other with 4" (butt), apply a hardening sealant of the same color as the paint color of the outer box to prevent rust on the cut surfaces, and fill in the gaps (5). 6). Therefore, in these conventional structures, not only does the aesthetic appearance of the cut corner portion deteriorate, but the number of parts increases, which increases the number of man-hours and costs. (2) The object of the invention is to provide a metal box for constructing an outer box of a refrigerator or the like by bending a flat coated steel plate. The purpose of the present invention is to improve the aesthetic appearance of the corner portion of the front flange forming the front flange and to reduce the number of parts and processing man-hours.Constitution of the second inventionThe metal box of the present invention has a flat painted steel plate≦double flange, Forming a double flange consisting of a folded flange folded back at a predetermined interval on the rear surface of the front flange and a rear flange parallel to both flanges, and forming ≦2 notches at appropriate positions in the double flange, The painted steel plate is bent into a box shape at the cutout portion to form the double flange (two) forming the front opening edge, and the corner portion (two adjacent front flanges are brought into contact and overlapped with each other to form a substantially coplanar surface). C to form
It is a combination of two things. E) Example The present invention will be described below with reference to an example shown in the drawings. (11) is an outer box for a refrigerator, etc. The outer box is a flat plate-shaped coated steel plate whose outer surface is coated after cutting and then bent at the bending parts UU and αJ, left and right sides. wall(
14) (15), a ceiling wall 6), and a bottom wall (L7) are formed. The front opening edge of the outer box (10) has a front flange α which is bent inward and a folded flange (4) which is continuous with the front flange and is folded back with a gap (1!) on the back surface ≦2. The folded flange (2G is a front edge groove for inserting an inner thread (2G) which abuts against the inner surface of the left and right side walls (14) (15+) and the inner surface of the ceiling wall a and the bottom wall αη and opens toward the front opening side. 24, a C double flange (two parallel rear flanges (c) with two marks is continuously formed. When folding the folding flange (a), the outer box (
Since 101 is made of painted steel plate, if the bending radius is small, the coating will crack or peel, so the bending radius needs to be relatively large. As mentioned above, a gap of C2 is provided between them.The front flange overlapping part ( 2), as shown in FIGS. 2 to 5, one front flange αe of the notch end edge has a folded flange (similar to the bending radius of 2), and has a small distance, and is aligned with a predetermined slope line A. -A≦= is folded back 18o0 to form a folded piece (c).The notched end edge of the other front flange a mallet that comes into contact with the folded piece (251) is the folded part (
11) Stepping is performed along inclined lines B-B and CC that are set so as to come into contact with the folded piece (C) when the folded piece (26) is bent to form a stepped piece (26). The stepped dimension of the paragraph piece □□□ is set so that when the folded piece (25) contacts and overlaps, the two adjacent front flanges α (1a) form substantially the same plane. Figure ≦2 shows an example of actual processing.In other words, a coated steel plate with a notch shape in which the developed view of a corner part (24) is shown in Figure 5C2 is processed using a roll former or the like.
As shown in Figure ml, flange processing is performed to form a front edge groove (221) for inserting the inner box at the front flange (2υ) and the rear flange.Next, as shown in Figure 6 1b+, the front flange (21) ( 21) are each folded at the bending part (Ll), and then are stepped and bent along the inclined lines B=B and A-A, which are set so that they come into contact with each other. A part of the folded piece c25) is bent by approximately q6.Next I: The folded piece (c) bent by approximately 90 degrees in the above process is further bent with a small gap (this gap is formed by the front flange (181
It has a gap equivalent to a small gap (19) formed between the folding flange (20) and the folding flange (20), and is bent approximately 1800 degrees as shown in FIG. 6, 1cl. The back side flange portions of the folded piece (c) and the stepped piece (26) are cut out as shown in FIG.
It is bent approximately 90 degrees like dl. In addition, in the notch shape shown in Fig. 5, the tongue piece (2'0 (c))
are provided symmetrically around the bending part (11), are located at the bottom of the leading edge groove C23, and are located on the left and right side walls (14) (151).
and the leading edge groove (221
At the same time, it serves to improve the strength of the tongue piece (27) (c) and also to prevent dents, etc. that occur in the cut part when it is bent at the bi-folding part (11). When the plane gap ■1 is bent, it extends to the bending radius of the bent part αυ.Therefore, the front flange (21) (21+) at the corner part of the front opening edge of the outer box (10) can be made aesthetically by the butt method of 2≦2. Up(
Appearance) Special C: The main problem is the ceiling angle α6) and the left and right side walls (141 (151C), so it is desirable to adopt the structure as described above, but the bottom wall part is shown in Figure 7, 12). In some cases, a structure such as
It adopts the polymerization method of 081 and the folded flange (to), and forms a folded flange (LLI11 and two depressions 9) at the part where the small gap ≦2 is created between the front flange 081 and the folded flange (to) and the front flange tta on one side. The other front flange (18) located on the back side of the button front flange U81 is also provided with a recess 6] to prevent deformation of the ridge line (to) of the other front flange (t81). FIG. 10 shows an exploded view of the main parts when an insulating box for a refrigerator or the like is constructed using the outer box Qi formed from wall steel plate C2 according to the present invention. (1
The back plate (to) that closes the back opening of 0) is an inner box made of synthetic resin, and the opening of the inner box has a front edge groove (2) of the outer box aω.
1) has an outwardly bent solange section that is inserted into the flange section, and a portion of the four corners of this flange section is inserted into the outer box (the front edge groove (26) located at the front edge of 1c5). Alternatively, a stepped part (to) is provided to escape the flange part depression (c). In the part, the folding piece and the step-down piece come into contact and overlap, making it possible for the n-reflange to maintain approximately the same plane, and when the inner box flange is inserted into the front edge groove, appropriate compression is applied, furthermore, the i-2 It is possible to increase the surface angle.Also, since the abutting portions at the corner I: are abutting and overlapping along the slope line f2, even if a slight gap is created at the abutting portion,
The flat part of the paragraph piece shows the same painted surface as the front flange surface, so there is no particular problem in terms of appearance, and a desirable aesthetic appearance can be maintained. Therefore, it is possible to eliminate the use of a corner bead at the front flange corner butt part and the use of a hardening sealant, which were seen in the conventional example, which reduces costs and improves assembly workability. . Furthermore, after the box has been processed, the cutting directions (notches, holes, etc.) that appear within the visible range are flat and painted after processing, so there is no need for anti-corrosion treatment.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a metal box according to the present invention, and FIG.
An enlarged plan view of the main part of the figure, Figure 3 is a 1-1 sectional view of Figure 2,
Figure 4 is the view from the back side of Figure 2 (8) Figure 7 is an enlarged view of a part of the lower corner of Figure 1, Figure 8 is the ■-■ of Figure 7
Cross-sectional view, Figure 9 is a slope view seen from the back side of Figure 7, Figure 1
Figure 0 is an exploded perspective view of a refrigerator cabinet using a metal box according to Wood's invention, Figures 11 and 12 are plan views of main parts of a conventional example corresponding to Figure 2, and Figures 16 and 14 are FIG. 11 and FIG. 12C: are sectional views of the main parts corresponding to ■-■ and ■-■ in FIG. (10) Outer box (IRI... Front flange
(20)...Folding flange Yu...Front flange Shij...Folding piece (261...Paragraph piece applicant Sanyo'q Kiki Co., Ltd. Figure 1 Figure 3 Figure 7 Figure 8 Figure 1' 6 18 Figure 9

Claims (1)

[Scope of Claims] A double flange consisting of a flat coated steel plate with two front flanges, a folded back flange which is folded back with a predetermined distance between the two back sides of the front flange, and a rear flange parallel to both of these flanges. Once the flange is formed, a notch is formed at an appropriate location on the double flange, the painted copper plate is bent into a box shape at the notch, the double flange forms a front opening edge, and a corner corner is formed. A metal box body characterized in that adjacent front flanges are brought into contact with each other at portions 52 to form substantially the same plane. 2] Form a folded piece by bending the upper front flange of the overlapping part inward along the inclined folding line so as to leave a small gap therebetween, and forming a folded piece on the lower front flange along the folding line of the upper front flange. A step piece is formed along the line, and the folded piece is brought into contact with and superposed on the step piece, thereby making the front flanges adjacent at the corner g2 substantially on the same plane. The metal box described in item 1.