JPS6021756Y2 - Thermal insulation structures such as refrigerator cabinets - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermal insulation structure for refrigerator doors, cabinets, etc.

As a heat insulating structure for refrigerator doors, cabinets, etc., an outer box and an inner box in the shape of a hollow box formed of metal plates with one side open are arranged in parallel with their openings facing each other. The surrounding area should be covered with a synthetic resin makeup frame, or
Conventionally, a device is known in which the outer box and the inner box are surrounded by a connecting plate and the hollow parts of the outer box and the inner box are filled with a foamed heat insulating material.

In this case, when assembling these outer and inner boxes with the decorative frame, protrusions such as rivets are provided on the inner surface of the decorative frame in advance, and these are injected into the space between the outer and inner boxes. A method in which a bag is formed on the inner surface of the decorative frame and the foam insulating material injected into the space between the outer box and the inner box is injected into the bag. etc. are being adopted.

However, all of these conventionally known methods
The disadvantages are that it takes a lot of man-hours to assemble and requires a large number of parts.

Therefore, the object of the present invention is to provide a heat insulating structure for refrigerator doors, cabinets, etc. that requires less assembly man-hours and fewer parts.

In the present invention, in order to achieve this objective distantly, the side edges of the plate-like surfaces that bound the surfaces of the outer box and the inner box are bent at right angles toward each other to form flat parts. The bent pieces are arranged so as to be aligned on one plane and their opposing side edges are bent at right angles to form bent pieces having a certain depth and facing each other at a certain distance, and , the connecting plate has an inner surface that rests on the flat parts of the outer box and the inner box, and has both side edges bent at right angles so as to contact the plate-like surfaces of the outer box and the inner box, and further has this inner surface. In this method, a pair of ribs are extended from between the folded pieces of the outer box and the inner box so as to touch their free ends, and each of these ribs is further extended to form the claw portions facing each other. , outer box,
It is characterized in that the space formed by the inner box and the connecting plate is filled with foamed heat insulating material.

Hereinafter, the present invention will be explained based on FIGS. 1 and 2 of the accompanying drawings showing one embodiment thereof.

FIG. 1 is a cross-sectional view of a part of a refrigerator cabinet in which the present invention is implemented.
As shown in the figure, this cabinet 1 includes a hollow box-shaped outer box 2 made of a metal plate that has a plate-like surface bordering the surface and is open on one side, and a hollow box-shaped outer box 2 made of a similar metal plate. The hollow space formed by the inner box 3, a synthetic resin connecting plate (joiner) 4 attached to the periphery of the outer box 2 and inner box 3, and the outer box 2, inner box 3, and connecting plate 4 is The heat insulating material 5, such as foamed resin, is used for filling.

To explain this in more detail, first, the outer box 2 and the inner box 3
have their plate-like surfaces 2 □ on the parts facing the connection plate 4.
, 31 are bent toward each other at almost right angles to form a flat part 2□,
3□ are arranged so that they have the same width and are aligned on one plane, and their opposing side edges are perpendicular to the plane portions 2□ and 32, respectively, and the plate-like surfaces 2t-31
The bent pieces 23 and 3 are bent so as to face each other.
form 3.

In this case, the distance between the plate-like surfaces 2□ and 31 of the outer box 2 and inner box 3 is set to the required thickness of the heat insulating material 5, and
The bent pieces 23, 33 facing each other have a predetermined interval B between them, and the bent pieces 23, 33
have the same constant depth h from the plane portions 2° and 3□, respectively.

On the other hand, the connecting plate 4 has a substantially constant thickness, and its inner surface 4
□ is the flat part 2° of the outer box 2 and inner box 3.

It has a planar shape so as to be in contact with 3□, and its both edges in the width direction are bent at almost right angles so as to slightly overlap the plate-like surfaces 2□ and 3□ of the outer box 2 and inner box 3, and the bent portion 4 Form □.

Further, from the inner surface 41, the bent pieces 23, 33 are moved inward by a certain dimension from the bent portions of the bent pieces 23, 33 of the outer box 2 and the inner box 3, which are close to each other. A rib 43 having a certain thickness diagonally so as to touch the free end of the
is extended in a straight line symmetrically with respect to the perpendicular bisector XX of the connecting plate 4, and the portions touching the free ends of the bent pieces 23 and 33 are so arranged as to be almost in contact with these free ends. A protrusion 44 is provided in the (see Fig. 2), and skirt portions 45 extending obliquely and linearly from the protrusion 44 toward each other are arranged symmetrically with respect to the perpendicular bisector XX. Formed on the outer ends of the waist are parallel opposed pawls 46 of the same height with a certain distance from each other.Finally, their free ends are respectively connected to the pawls. 46 and extend outwardly by the same length.

In the present invention, the outer box 2, the inner box 3, and the connecting plate 4 each have the above-mentioned cross-sectional contours.Next, the procedure for manufacturing, for example, a refrigerator cabinet by combining these is as follows. The explanation is as follows.

(1) After the flat parts 2□ and 32 of the outer box 2 and inner box 3 are aligned on the same plane and the bent pieces 23 and 33 are arranged facing each other with a predetermined interval B, the flat parts 2゜、
3. Drive in the connection plate 4 from above.

(2) In the driven connection plate 4, the protrusion 44 formed on the rib 43 extending from the lower surface 41 contacts the free ends of the bent pieces 23, 33 of the outer box 2 and inner box 3. In addition, the inner surfaces of the bent edges 4° formed on both sides of the connecting plate 4 are connected to the plate-like surfaces 2. of the outer box 2 and inner box 3. ,3
In this way, the outer box 2 and the inner box 3 are firmly secured in position by the connecting plate 4.

(3) Next, a foamed resin, such as hard polyurethane, is injected into the space formed by the outer box 2, inner box 3, and connection plate 4.

In this case, the foamed resin is inserted between the claws 46 of the connecting plate 4.
The inner surface 41 of the connecting plate 4 and its opposing ribs 43, the skirt portion 4. They also try to enter the closed space surrounded by the claws 46, but this results in compressing the air in the closed space, so it is impossible for them to enter the gap between the claws 46 beyond a certain level. In addition, the foamed resin that has entered the area solidifies in a wedge shape.

Therefore, after the foamed resin 5 has solidified, the connecting plate 4 acts as a wedge and is prevented from falling off due to its engagement with the free ends of the bent edges 23, 33 of the outer box 2 and inner box 3. effectively prevent it.

As described above, in the present invention, since the connecting plate 4 has a special shape having the claw portion 46, after the outer box 2 and the inner box 3 are combined with this, the space formed by them is By injecting the foamed resin 5 into the container, a refrigerator cabinet or the like can be constructed. In this case, the space between the outer box 2 and the inner box 3 is sealed by the connecting plate 4. Pretreatment such as hole plugging, which was conventionally performed for injection of foamed resin, is no longer necessary.

Furthermore, this connecting plate 4 also has the effect of serving as a jig for accurate assembly of the outer box 2 and inner box 3, making it possible to further improve workability.

Moreover, the space formed by the inner surface 41 of the connecting plate 4, the opposing ribs 43, the skirt portion 45, and the claw portion 46 is free from the foamed resin 5 that has entered a part of the gap between the claw portions 46. Since a space is left behind, this space can also be effectively used as a space for passing lead wires and the like.

On the other hand, in many cases, with this type of conventional heat insulating structure, foamed plastic is injected into the space between the outer box and the inner box in advance, and then the connecting plate is driven in, so there is no need to plug the holes. Pretreatment is required, and it is not possible to leave such an effective space inside.

In addition, since the connecting plate in the present invention can be easily manufactured by continuous extrusion molding from an appropriate synthetic resin,
Another advantage is that it can be manufactured at low cost.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing one embodiment of the present invention, and FIG. 2 is an enlarged view of a portion thereof. 1...cabinet, 2...outer box, 2
3...Folded piece, 3...Inner box, 33.
...Folded piece, 4...Connection plate, 41...
...Inner surface, 4□...Bent part, 43...
...Rib, 44...Protrusion, 45...
・Skirt part, 46... claw part.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Refrigerator cabinet, etc., comprising a metal outer box 2 and an inner box 3 arranged facing each other, and a space formed between the two filled with foamed heat insulating material 5. In thermally insulated structures,
The plate-like surfaces 2□ and 31 that bound the surfaces of the outer box 2 and the inner box 3 are bent toward each other at approximately right angles so that the flat portions 2° and 3□ are approximately aligned and have approximately the same width. The end of the flat part is further formed into a plate-like surface 2□ at a nearly right angle. 31, and the bent pieces 23 and 33 are arranged to have a certain depth h and to face each other with a certain distance B, and also rest on these flat parts 2° and 3□. A plate-shaped connecting plate 4 having a flat inner surface 41 is bent by bending its widthwise end so as to be in contact with the plate-shaped surfaces 21 = 31 of the outer box 2 and the inner box 3, respectively, at a substantially right angle. A bent portion 4 □ is formed, and further, from the inner surface 41 of the connecting plate 4 to the outer box 2
and extend a pair of ribs 43 so as to touch the free ends of the opposing bent pieces 23 and 33 of the inner box 3, and extend them further, and provide claw portions 46 facing each other near their free ends. The inner box 3
and a heat insulating structure in which almost the entire space of the outer box 2 and a part of the gap between the claws 46 of the connecting plate 4 are filled with foamed heat insulating material 5. 21 pairs of ribs 43 are linearly extended diagonally outward from the inner surface 41 of the connecting plate 4 so as to be approximately symmetrical with respect to the perpendicular bisector From the contact portion with the free end of the bent piece 23=33 of the box 3, the skirt portions 4. and skirt part 4
5. The heat insulating structure according to claim 1, wherein the claw portions 46 extend parallel to the perpendicular bisector XX from the outer end of the heat insulating structure. 3. A protrusion 4.3 is provided at the contact portion of the rib 43 of the connecting plate 4 with the free ends of the bent pieces 23, 33 of the outer box 2 and inner box 3. 2. A heat insulating structure according to claim 1 or 2 of the utility model registration claim. 4. The heat insulating structure according to claim 1, 2 or 3 of the utility model registration claim, in which the connecting plate 4 is made of synthetic resin.