JPH02133785A - Heat insulated box - Google Patents

Abstract

PURPOSE:To facilitate an installing of a reinforcing member for an outer box, to assure a stable installing strength and at the same time to improve an entire strength of a heat-insulated box by a method wherein a double flange is formed by a front surface flange, a rear surface flange, a back flange and an extended flange and a reinforcing member is fixed to the rear surface of the back flange with one surface spot welding. CONSTITUTION:In this box 15, a double flange 20 is formed by a right side plate, a left side plate, a top plate bent, a front surface flange 20a, a rear surface flange 20b in continuous with the front surface flange 20a and bent in a spaced-apart for the rear side of the front surface flange 20a, a back flange 20c for forming a groove 25 between it and a rear surface flange 20b, and an extending flange 20d continuously with the rear flange 20c and extended toward the rear side. Iron reinforcing members 26 are fixed and fused at the rear surface of the back flange 20c at the front right and left corners of the cabinet 14 by one surface spot welding and fixed.

Description

[Detailed Description of the Invention] Industrial Application Field 2'- The present invention relates to a heat insulating box body for a refrigerator, etc., in which a foam insulation material is foamed and filled between an outer box and an inner box formed by bending painted steel plates. It is.

2. Description of the Related Art Conventionally, this type of insulation box is disclosed in, for example, Japanese Patent Application Laid-Open No. 59138874.
As shown in the publication, the structure was as shown in FIGS. 9 to 12.

That is, 1 is a cabinet forming the outer box 3 of the heat insulating box 2, and the left side plate 4. Right side plate 5, top plate 6 and further front opening 1
The double flange 7 formed on the -1 edge is formed by bending a single band-shaped painted steel plate.

The double flange 7 is made by bending the left and right side plates 4, 5 and the top plate 6.
A front flange 7a, a back flange 7b that is continuous with the front flange 7a and folded back with a slight interval to the back side of the front flange 7a, and a back flange 7b that is continuous with the back flange 7b and located behind the back flange 7b. It is formed by a rear flange 7C forming a groove 8 at the rear flange 7C. The rear flange 7C has grooves 8 at approximately 45 degree angles at the front left and right corners.
A notch 9 extending diagonally downward is formed at the open end.

Further, square-shaped locking holes 10 are formed in the vertical and horizontal sides of the rear flange 7C, respectively. Reference numeral 11 denotes a reinforcing member, which has a two-sided shape having a vertical side 11a and a horizontal side 11b to be inserted into the groove 8 at the left and right corners of the front surface of the cabinet 1,
An engaging portion 11c is recessed at a part of the corner so as to fit into the notch 9, and the ends of the vertical side 11a and the horizontal side 11b are bent rearward and are inserted and locked into the locking holes 10, 10, respectively. A locking portion 11d is formed.

As described above, the inner box 12 is combined with the cabinet 1, that is, the outer box 3, which is combined with the reinforcing member 11 and whose corners are reinforced, while maintaining a space, and a foamed heat insulating material 13 is placed between the two boxes using the in-situ foaming method. The insulation box 2 is formed by foam filling. Since the inner box 12 has an inner box flange 12a formed at the front opening edge, the inner box flange 12a is inserted between the back flange 7b and the rear flange 7C in the groove 8, and the foamed heat insulating material 13 leaks to the outside. is prevented.

Problems to be Solved by the Invention However, in the above configuration, the reinforcing member 11 has the engaging portion 11c fitted into the notch 9, and the locking portion 11d inserted into the locking hole 10 and locked therein. It is difficult and the work is likely to become uncertain, and furthermore, due to dimensional variations due to parts machining of the reinforcing member and the notch 9 of the cabinet 1 and the locking hole 10, looseness may occur at the fitting and locking portions of the cabinet 1. A part of the corner of the front 7 lange 7a was opened, creating an unfavorable appearance, and the corner part was deformed when the entire refrigerator was assembled. There was a risk that other problems would arise.

In view of the above-mentioned problems, it is an object of the present invention to facilitate attachment of a reinforcing member to the outer box, ensure stable attachment strength, and improve the overall strength of the heat insulating box.

Means for Solving the Problems In order to achieve the above problems, the heat insulating box of the present invention has a front flange formed by bending the front opening edge of the cabinet formed of a painted steel plate inward, and a front flange formed on the back side of the front flange. Fold back to form a back flange, and form a groove between the back flange and the back flange continuously from the back 7 flange;
After this, a double flange consisting of the flange and an extended flange that continuously extends rearward is formed, and a reinforcing member made of a steel plate is fixed and fused to the back side of the rear flange by one-sided spot welding. Then, the inner box flange formed on the outer periphery of the inner box is inserted into the groove of the double flange, and a foamed heat insulating material is foam-filled between the inner box and the outer box.

Function: With the above-described configuration, the present invention can firmly fix the reinforcing member of the outer box, ensure the strength of a part of the corner of the outer box, etc., and embed the extending flange in the foam insulation material. In particular, the strength of the heat insulating box can also be improved.

EXAMPLE Hereinafter, a heat insulating box for a refrigerator according to an example of the present invention will be described with reference to the drawings.

In FIGS. 1 to 8, 14 is a gear vignette forming the outer box 16 and the left side plate 17 and the right side plate 1.
8, the top plate 19, and a double flange 20 formed at the edge of the front opening are formed by bending a single strip-shaped painted steel plate that has been previously painted. 14a is the painted film, and 14b is the steel plate body. The left and right side plates 17 and 18 of the cabinet 14 are bent to form an inwardly facing generally horizontal flange 21 at the lower end edge and an inwardly facing approximately perpendicular flange 22 at the rear end edge. Furthermore, a downward, substantially vertical flange 23 is bent at the rear end of the top plate 19, and although not shown, the bottom plate 24 is attached to a supporting member fixed to the flange 21, 21 with screws or the like using screws or the like. fixed and also flanges 22.22.
The outer box 16 is constructed by fixing the back plate 24 over the entire length of the outer case 23 with screws or the like.

The double flange 20 is formed by bending the left and right side plates 17, 18 and the top plate 19 to form the front 7 langes 20a and this front flange 20.
a back flange 20b that is continuously folded back to the back side of the front flange 20a with a slight gap, and a rear flange 20 that forms a groove 25 between the back flange 20b and the back flange 20b.
It is formed by an extending flange 20d that extends rearward and is continuous with the rear flange 20C of the flange 20C. ,2
6 is a reinforcing member made of iron plate, and 0 of cabinet 1-14.
At the left and right corners of the 11th side, the rear flange 20c has a vertical side 26a and a horizontal side 26b, which are fixed to the back side by a single-side subbono 1-welding method, and are further formed toward the rear. Vertical side flange 26c and horizontal side flange 2
It has 6d. Reference numeral 26e denotes a protrusion commonly called a projection, which forms a convex portion on the front surface of the S side 26a and (yellow side 26b), respectively. The reinforcing member 26 has a diameter of about 1 to 2 mm.The single-sided welding method of the reinforcing part 1'126 will be explained in detail.As shown in FIGS. 1 and 3, the reinforcing member 26 is The steel plate main body 14b is in contact with the back surface of the rear flange 20c of the cabinet 1-14, and then the back surface of the flange 20c is in contact with the reinforcing member 26 on the side opposite to the coating film 14a.Furthermore, as shown in FIG. The law is a city--in other words, it is a smear that does not have a strong sense of strength or life [14]
The base 27a of the spora l-tool 27 is positioned on the − side, and electric welding is performed using the spora l-tool 27 only on one side, which is opposite to the coating film 14a.

27b is a holding plate B made of a steel plate called a sennobu for the minus (minus) electrode, and 27c is a holding plate C for the plus (plus) electrode. The reinforcing member 26 is pressed against the steel plate main body 14b by this holding plate C as shown in the figure, and further, the 'IIi flow is caused to flow from the holding plate C through the steel plate main body 14b to the holding plate B, and is fixed and melted by the heat generated at that time. Fixed. Further, due to the protrusions 26e provided on the reinforcing member 26, current and pressure are concentrated on the protrusions 26e, and the protrusions 26e are completely melted and more stably fixed to the steel plate main body 14b.

Next, 28 is an inner box molded from resin, 28a is an inner box flange formed on the outer periphery of the inner box 28, and 28b is a fitting part forming a protrusion formed on this inner box flange 28a. A suppressing piece 28c is molded on the outside of the fitting portion 28b with υ. Here, the fitting part 2sb is inserted and fitted into the groove 25 formed in the double flange 2° of the cabinet 14, and the elastic force of the pressing force J-j-2sc causes the back flange 2
0b cabinet 1-14 outwardly facing front flange 20
It is pressed against the back flange close contact portion 20e that is in substantially close contact with the back surface of a. In addition, the extending flange 20d has a gap (A) with the inner box 28.
・A moderate level (approximately 3 to 1 omm) is ensured. With this configuration, the foamed heat insulating material 29 is foamed and filled in the space where the inner box 28 and the outer box 16 are combined, and the heat insulating box body 15 is completed.

As described above, according to this embodiment, the reinforcing member 26 is welded on one side of the steel plate main body 14b on which the coating film 14a of the cabinet 1-14 made of a p-coated steel plate is not formed by a single-sided spot welding method. Since it is fixed by fixing and melting it, stable mounting strength can be obtained with a simple device.

Also, in this example, the half-side subbono welding method was explained using a painted steel plate coated on only one side, but even if a coating film is formed on both sides, the outside = p , -+ can be electrically or mechanically applied.
- Do you want to remove the paint film only on the - surface within the range that does not cause any problems?
If T, this method can be performed, and in addition, the reinforcement part (-4 = 7-
I don't think it would have the same effect even if some of it is used on keto.

In addition, since the back flange 20b of the double flange 20 is formed with a back flange contact portion 20e that is in close contact with the front flange 20a, it can withstand the insertion force when inserting the fitting portion 28b of the inner box 28 into the groove 25. This prevents the double flange 20 from deforming. Furthermore, since the pressing piece 28c is pressed against the back flange tight part 20e by its elastic force, leakage during foam filling of the foam insulation material 29 can be prevented, and the back flange 20b and the back flange tight contact part 20e can be prevented from leaking.
Because the pressure piece 28c is prevented from coming off the groove 25 due to the difference in level between the outer box 16 and the inner box 28,
The fitting portion 28b is closed due to the pressure during foam filling of the foam insulation material 29.
This also eliminates the problem of the double flange 20 coming off. In addition, the extending flange 20d improves the workability of inserting the fitting part 2sb of the inner box 28 into the groove 25 of the double flange 20, and also reduces the gap between the inner box 28 and the inner box 28 (
By ensuring that the foam insulation material 290 (foam filling method) is moderate (about 3 to 10 mm), the flow of the foam insulation material 290 (foam filling) is obstructed, and the foam insulation material 29 from the inner box flange 28a and the groove 25 is blocked.
Further, by embedding the extended flange 20d in the foamed heat insulating material 29, the strength of the heat insulating box 15 is improved.

As described above, the present invention includes a front opening edge of a cabinet formed of a painted steel plate whose surface is pre-painted, which is bent inward to form a front flange, and then folded back to the back side of the front flange. A back flange is formed, and a groove is formed between the back flange and the back flange continuously from the back flange;
After that, a double flange is formed by continuously extending backward from the 7 flange, and a reinforcing member made of an iron plate is fixed and fused to the back side of the rear flange by one-sided spot welding. After that, the inner box flange formed on the outer periphery of the inner box is inserted into the groove of the double 7-lunge, and the foam insulation material is foam-filled between the inner box and the outer box to form a heat-insulating box body.
The reinforcing member has a strength that is several steps higher than the conventional method of fixing by fitting and locking, and it can be installed stably with a simple device, and can be attached to some corners of the outer box and the insulation box. The strength of the heat insulating box can be further improved by embedding the extending flange in the foamed heat insulating material.

[Brief explanation of the drawing]

Fig. 1 is an enlarged sectional view of the main parts of a heat insulating box showing an embodiment of the present invention, Fig. 2 is a front perspective view thereof, Fig. 3 is a perspective view of main parts of the outer box, and Fig. 4 is its reinforcement. FIG. 5 is an enlarged sectional view of the member, FIG. 6 is a sectional view showing the manufacturing process, FIG. 7 is a front perspective view of the inner box, and FIG. 8 is a front perspective view of the outer box. , FIG. 9 is a front perspective view of the cabinet,
FIGS. 10 and 13 are sectional views of the main parts thereof. 14...Cabinet, 15...Insulation box, 16...Outer box, 20...Double flange, 20 a...Front flange , 20b...
...Back flange, 20c...Rear flange, 20d...Extended flange, 25...
Groove, 26... Reinforcement member, 28... Inner box, 28a... Inner box flange, 29...
Foam insulation. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (1)

[Claims] A cabinet formed by bending a strip-shaped painted steel plate that has been pre-painted on one side, a front flange formed by bending the front opening edge inward, a back flange folded back to the back side of this front flange, and this cabinet. A double flange consists of a rear flange that continues from the back flange and has a groove formed between it and the rear flange, and an extended flange that extends rearward continuously from the rear flange, and the vertical and horizontal sides. an outer box made of a reinforcing member made of a steel plate whose sides are fixed and fused to the rear surface of the rear flange by single-sided spot welding, an inner box made of resin, and a cabinet formed on the outer periphery of the inner box. A heat insulating box body comprising an inner box flange inserted into a double flange groove, and a foam insulation material filled between the inner box and the outer box.