JPH0314611B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a heat insulating box body which is formed by foaming the openings of both the inner and outer boxes as upper surfaces.

Examples of the present invention will be described below with reference to the drawings.
Reference numeral 1 shown in FIGS. 1 and 2 is an insulating box for a refrigerator, etc., which has an opening on the front that is closed by an insulating door (not shown), and includes a metal inner box 2 with an open front, and a metal inner box 2 with an open front. A metal outer box 3 with an opening at the front in which the inner and outer boxes are installed, four resin decorative frames 4 that connect the inner and outer boxes and define the opening, and an appropriate number of frames that maintain the two boxes at a predetermined distance. a heat insulating spacer 5a, and a foamed heat insulating material 5 such as hard polyurethane foamed and filled between the two boxes.
It is composed of: Reference numeral 6 denotes a plurality of holes formed in the front wall 3a of the outer box at appropriate positions for attaching hinges (not shown), and 7 indicates each decorative frame 4 for attaching vertical and horizontal partitions (not shown) that partition the opening into a plurality of sections. 8 are four resin corner covers arranged in the squares of the openings to cover the adjacent edges of each of the decorative frames; 9 is the undiluted solution of the foam insulation material; An injection hole is formed in the bottom wall of the outer box 3 for injecting the liquid, and 10 is a cap body that closes this injection hole.

Next, the assembly and foaming of the heat insulating box 1 will be explained with reference to FIGS. 3 to 6.

As shown in FIG. 3, the inner box 2 has a first stepped portion 2a whose opening edge is bent outward in a stepped manner and an elastic sealing member 11 made of foamed polyethylene or the like is adhered to the inner surface.
and a second step portion 2 whose inner surface is in contact with the outer surface of each decorative frame 4.
b and the stop portion 2 where the inner side end surface of each decorative frame 4 contacts
c, and the outer box 3 has a front wall 3a which becomes the opening edge.
A storage wall 3 formed into a U-shape by bending the inner peripheral edge inward.
b, and a groove 13 which is defined in this storage wall and accommodates an elastic sealing member 12 made of foamed polyethylene or the like.

The outer box is installed with the opening facing upward, and the inner box 2 is inserted into the outer box 3 with the opening facing upward, and the inner box 2 is placed on the heat insulating spacer 5a so that the edge of the opening is spaced from the edge of the opening of the outer box. will be installed in

Reference numeral 14 shown in FIG. 4 is a breathable member made of a soft foamed resin, such as maltprene, and is arranged in an L-shape across the square edges of both boxes 2 and 3. , 3 both seal members 1
1 and 12.

As shown in FIG. 5, each decorative frame 4 has a sealing member 1.
1. A main body part 4' in contact with the second step part 2b and the stop part 2c, and a first step part 2a extending outward from this main body part.
The clamping portion is in a dogleg shape and clamps the first step 2a and the sealing member 11 together with the main body, and the elastic clamping piece 4a is inserted into the groove 13 and contacts the inner wall of the storage wall 3b to hold the sealing member 12. A wedge-shaped insertion portion 4b that deforms under pressure is integrally formed with an overhang portion 4c that contacts the end face of the storage wall 3b and restricts the insertion of the insertion portion, and the clamping pieces 4a and the overhang portion 4c near both end edges are formed integrally. A cutout portion 15 is formed.

16 is an L that interconnects and connects the four decorative frames 4.
It is a metal connecting plate in the shape of a letter, and a slightly larger auxiliary ventilation member 17 is attached to the outer surface except for the inside part of the refrigerator, and one end of the auxiliary ventilation member 17 is attached to one end of each decorative frame 4 disposed perpendicularly. The screws 18 are fixed to the portion 15 in advance, and the decorative frame is installed at each corner of the opening at the same time as the decorative frame is attached. Due to the arrangement of this connecting plate, the inside part of the refrigerator comes into contact with the ventilation member 14 and presses and deforms this ventilation member and the sealing member 11, and the end surface of the outside part of the refrigerator comes into contact with the air permeable member 14 and presses and deforms the air permeable member 14, and the end face of the outside part of the refrigerator is rearward with an interval from the front surface of the front wall 3a. The auxiliary air permeable member 17 located at and in contact with the air permeable member 14 is pressed and deformed together with the air permeable member depending on the attachment state of the decorative frame 4. Further, after attaching the other orthogonal decorative frame 4 to the other end of this connecting plate, one end of this decorative frame is in contact with the notch 15 and fixed with a screw 19. are connected to each other with their edges spaced apart.

Reference numeral 20 denotes an L-shaped gap defined by the orthogonal edges of the front wall 3a, the outer side end surfaces of the connecting plates 16, which are also orthogonal, and the edge of each decorative frame 4, which are also orthogonal. A portion of the air permeable member 14 and the auxiliary air permeable member 17 are exposed in this gap.

Both the inner and outer boxes 2 and 3 are connected to each other in an airtight manner by attaching the decorative frames 4 described above, and the decorative frames 4 are connected to each other in an airtight manner by the connecting plates 16 and the air permeable members 17.

After completing such assembly, both the inner and outer boxes 2 and 3 are fixed using a well-known jig, and a foaming stock solution is injected into the space between the two boxes through the injection hole 9. The foaming solution gradually foams and grows due to chemical changes, and the air and fluorocarbon gas between the two boxes 2 and 3 are removed by the air permeable member 14 and the auxiliary air permeable member 17.
As a result, the foam is filled between the two boxes, solidified and becomes the foamed heat insulating material 5, and a part of it is solidified while being impregnated into the air permeable member 14 and the auxiliary air permeable member 17. do.

After the foamed heat insulating material 5 has solidified, the jig is removed and corner covers 8 are attached to each corner of the opening as shown in FIG. 6 to cover the connecting plates 16 and gaps 20, thereby completing the production of the heat insulating box 1. .

According to this manufacturing method, the edges of both the openings of the inner and outer boxes 2 and 3, which are installed with the openings as the top surfaces, are separated, and a breathable member 14 made of soft foamed resin or the like is placed at each corner of the edges. After installation, a part of the breathable member 14 is covered at both ends of each decorative frame 4 connecting the inner and outer boxes 2 and 3 at right angles to each other, and a gap 20 is formed between the edges.
In order to inject the foaming stock solution into the space between the two boxes and release the air and gas between the two boxes through the ventilation member 14 and the gap 20, each decorative frame 4 is removed when the boxes 2 and 3 are connected.
Even if there is some deviation in the mounting position of the
There is no need to modify the installation position due to the length that increases or decreases in the dimensions of the box, and the connection work of both boxes 2 and 3 can be done quickly. There is no need to provide a space, and air and gas can be vented from the gaps 20 that are formed at the same time as each decorative frame 4 is attached.Moreover, since these gaps are located at each corner of the opening, air and gas can be vented uniformly. , and further a gap 20 is formed by the breathable member 14.
It is possible to prevent the foamed heat insulating material 5 from leaking to the inside. Furthermore, since each gap 20 is covered with a corner cover 8 after foaming, it is possible to cover the edges of each decorative frame 4 at the same time as the gap 20, and in the unlikely event that the foamed insulation material 5 leaks from the gap 20. However, there is no need for post-processing.

As described above, the present invention involves inserting an inner box with the opening as the top surface into an outer box installed with the opening as the top surface, separating the edges of the openings of both the inner and outer boxes, and attaching a soft material to each corner of both edges of both boxes. After straddling and arranging a breathable member made of foamed resin, etc., decorative frames are arranged orthogonally so as to cover part of the breathable member at both ends and to form a gap between the edges. Connect the boxes, inject the foaming solution into the space between the two boxes, remove the gas between the two boxes through the ventilation member and the gap, and after foaming and solidifying the insulation material, place a corner cover to cover the gap. Because of this feature, it is possible to form a gap that serves as an air and gas vent hole at the same time as connecting both the inner and outer boxes, and it also simplifies the installation of each decorative frame, making it possible to quickly connect the two boxes. Furthermore, it is possible to uniformly vent air and gas while preventing foam from leaking through the gaps, and it is also possible to improve the design effect by covering the edges of each decorative frame at the same time as the gaps after foaming.

[Brief explanation of the drawing]

The drawings show an embodiment of the method for manufacturing a heat insulating box according to the present invention, and FIG. 1 is a perspective view of a heat insulating box manufactured according to the present invention, FIG. 2 is a sectional view taken along line A-A' in FIG. 1, and FIG. 6 to 6 are explanatory diagrams of main parts sequentially showing the assembly and foaming process of both the inner and outer boxes. 2... Inner box, 3... Outer box, 4... Decorative frame, 5...
...Foam insulation material, 8...Corner cover, 14...
Air permeable member, 20... gap.

Claims (1)

[Claims] 1. Insert an inner box with the opening as the top surface into an outer box installed with the opening as the top surface, separate the opening edges of both the inner and outer boxes, and install ventilation made of soft foam resin, etc. at each corner of both edges of both boxes. After straddling and arranging the air permeable member, decorative frames are arranged at right angles so as to cover part of the air permeable member at both ends and to form a gap between the edges to connect both the inner and outer boxes. Then, the foaming solution is injected into the space between the two boxes to remove the air and gas between the two boxes through the ventilation member and the gap, and after the insulation material is foamed and solidified, a corner cover is placed to cover the gap. A method of manufacturing a heat insulating box body characterized by: