JPS5829832Y2 - Boxes for refrigerators, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a structure for preventing deformation of a box such as a refrigerator which is partitioned into two upper and lower chambers by inserting a partition into the inner surface of the inner box.

The deformation prevention structure of the box bodies of refrigerators, etc. that has been generally implemented in the past will be explained with reference to FIGS. 1 and 2. 1 is an outer box, 2 is an inner box, 3 is a rigid polyurethane foam, 4 is a partition plate, and 5 is 6 is a partition, 7 is a seal plate, and 8 is a locking device.

In Figures 1 and 2, a flange holding part 1b of the inner box 2 is formed on the back side of the front flange part of the outer box 1, and the flange of the inner box 2 is attached to this holding part 1b. A space is formed between the outer box 1 and the inner box 2 by engagement, and a foaming solution such as rigid polyurethane foam 3 is injected into this space and foamed to produce an insulating box.

In order to divide the inner surface of this heat insulating box into two upper and lower chambers, a partitioning heater (not shown) or the like is installed along the groove formed in advance on the inner surface of the inner box 2, and a sealing plate 7 is attached to the side surface. The assembled partition body 6 is inserted, and then the partition plate 4 is attached to the front side of the partition body 6.

This partition plate 4 has one end connected to the front flange of the outer box 1 and the inner box 2.
A stepped part is formed to be inserted between the flanges of the outer box 1, and when the stepped part is inserted, the front flange of the outer box 1 and the front of the partition plate 4 are installed on the same surface. .

The other end of the partition plate 4 is attached so as to face the end of the front flange of the outer box 1, and the gap between this opposing part and the end of the front flange of the outer box 1 at the insertion part of the above-mentioned one end. The gap between the partition plate 4 and the stepped end of the partition plate 4 needs to be configured to be as small as possible in order to reduce the circulation of cold air between the upper and lower two rooms or the leakage of cold air to the outside.

On the other hand, in the heat insulating box manufactured as described above, the rigid polyurethane foam 3 undergoes dimensional changes due to temperature changes, and it is known that this dimensional change causes shrinkage in low temperature ranges and expansion in high temperature ranges. .

This dimensional change of the rigid polyurethane foam 3 acts as if stress is applied to the side surface of the outer case 1 that is in close contact with it, causing deformation of the side surface of the outer case 1, and this deformation of the side surface causes the front surface connected to the side surface to deform. Even the dimensions between the left and right flanges of the flange are deformed.

This dimensional change between the left and right front flanges of the outer box 1 may cause the gap between the front flange end of the outer box 1 and the partition plate 4 to further increase, or the gap may become too small, causing the front flange end of the outer box 1 to may end up on the front of the partition plate 4.

In order to prevent this phenomenon, after inserting the partition 6 into the inner box 2,
An insertion hole 2a for the locking tool 8 is formed in advance on the side surface of the inner box 2, and the locking tool 8 bent into an abbreviated shape is inserted through the insertion hole 2a, which is closed with adhesive tape (not shown), and one side is inserted into the inner box. It is fixed to the partition body 6 with a locking tool mounting screw 5 with the back side in contact and one side in contact with the front side of the partition body 6.

In this structure, the flange of the inner box 1 is held by the flange holding part of the inner box 1 formed on the back side of the front flange of the outer box 1, and the locking tool 8 is applied to the side of the inner box 2 connected to this flange part. The outer box 1 and the partition 6 are connected indirectly by fixing the locking tool 8 to the partition 6 with the locking tool mounting screw 5,
To prevent the dimension between the left and right front flanges of the outer box 1 from increasing, and to prevent the dimension from becoming smaller, a locking device (not shown) similar to the locking device 8 described above is installed on the inner surface of the inner box 2. However, if the clamping force of the flange clamping portion of the inner box 1 formed on the back surface of the front flange of the outer box 1 is weak, the effect is small.

In addition, the insertion of the locking tool 8 is performed while removing the hard polyurethane foam 3 at the tip of the locking tool 8, which takes time, and furthermore, the back surface of the inner box 2 and the locking tool 8 do not make complete contact. In this case, the effect on the above-mentioned spread between the left and right front flanges is reduced, and care must be taken to ensure complete contact, which increases manufacturing costs.

For the same purpose as above, there is also a method of forming through holes in the front flange of the outer box 1 and tightening screws to the partition plate 4 from the front (
(not shown) In this case, the heads of the screws are exposed, which is unfavorable in appearance, and the painted surface of the outer case 1 is damaged by tightening the screws.

The present invention has been made in view of this point.

An embodiment of the present invention will be explained with reference to FIG. 3. 1 is an outer box;
2 is an inner box, 3 is a rigid polyurethane foam, 4 is a partition plate, 6 is a partition body, 7 is a seal plate, 9 is a locking piece, 10 is a locking piece fixing screw, and 11 is a partition body fixing screw. .

In FIG. 3, the locking piece 9 has a contact surface with the back surface of the flange portion holding portion 1b of the inner box 2 formed on the back surface of the front flange of the outer box 1, and a contact surface with the back surface of the inner box 2. It is made by injection molding of synthetic resin or the like.

The contact surfaces of this locking piece 9 are the back surface of the holding part 1b and the inner box 2.
The shape is approximately the same as that of the back side.

This locking piece 9 can also be formed by bending an iron plate, but in this case, the outer box 1 and the cooled inner box 2 are thermally connected, so frosting may occur on the outer box 1. This is not desirable.

Such a locking piece 9 is brought into contact with the back surface of the clamping portion 1b at approximately the same position as the insertion portion of the partition body 6, and is fixedly attached by a locking piece mounting screw 10.

In this state, the inner box 2 is engaged with the flange holding part 1b of the inner box 2 formed on the back surface of the front flange of the outer box 1, and a space is formed between the outer box 1 and the inner box, and this space is closed. A foaming solution such as rigid polyurethane foam 3 is injected into the box and foamed to form an insulating box.

A groove for inserting the partition 6 is formed in advance on the inner surface of the inner box 2 of such a heat-insulating box body, a partitioning heat (not shown) is installed along this insertion groove, and a sealing plate 7 is attached to the side surface. A partition body 6 assembled and configured is inserted to divide the room into two upper and lower chambers.

The partition fixing screw 11 is tightened and fixed to the locking piece 9 from the side of the rear partition 6.

At this time, the side surface of the inner box 2 is formed so as to be held between the locking piece 9 and the side surface of the partition body 6.

In such a box body, the rigid polyurethane foam 3 contracts or expands due to temperature changes, deforming the side surfaces of the outer box 1, and the force acting thereon changes the dimensions between the left and right front flanges of the outer box 1. Also, the partition body 6 and the outer box 1 are connected to the locking piece 9.
Since the partitions 6 and the locking pieces 9 are firmly connected through the partitions, dimensional changes can be prevented unless the partitions 6 and the locking pieces 9 are damaged.

In addition, in this structure, the inner box 2 is held between the locking piece 9 and the partition body 6, and the flange surface connected to this holding surface is held by the holding part 1b of the outer box 1, thereby preventing indirect damage due to the holding force. The effects are combined and the above-mentioned dimensional change prevention is even more effective.

- Prevention of breakage of the partition body 6' and the locking piece 9 mentioned above can be easily achieved by increasing the plate thickness or using a synthetic resin material with excellent physical properties.

The clamping force 1b of the front flange of the outer box 1 may be parallel to the front flange, but by forming it into a substantially R-shape, the clamping force of the flange of the inner box 2 can be increased.

Further, by interposing a double-sided adhesive tape or an adhesive (both not shown) between the back surface of the holding portion 1b and the locking piece 9 that abuts thereon, the fixing strength between the two can be improved.

When an external force is applied to the locking piece 9, and a force acts to separate the locking piece 9 and the back contact surface of the clamping portion 1b, that is, a force to weaken the clamping force of the flange of the inner box 2. It is also effective to form a contact surface 9b on the locking piece 9 with the back surface of the outer box 1 in order to facilitate the positioning of the locking piece 9 when it is attached to the back surface of the holding portion 1b.

As described above, in the conventional structure for preventing deformation of the box body of a refrigerator, etc., the front flange of the inner box is held between the front flange of the outer box, a locking tool is brought into contact with the inner box, and this locking tool is Fixing to the partition has little deformation prevention effect and the fasteners are difficult to attach, increasing manufacturing costs, and reducing the quality of the appearance due to the method of screwing the partition from the front of the outer box. , and defects that may damage the painted surface, attach one side of the locking piece to the inner box holding part on the back of the flange on the front of the outer box.
The other side of this locking piece is brought into contact with the back surface of the inner box, and the side in contact with the back surface of the inner box is fixed with screws so that the locking piece and the side of the partition body sandwich the inner box. It is something.

[Brief explanation of the drawing]

Fig. 1 is a front view of a refrigerator box, Fig. 2 is a sectional view taken along line A-A in Fig. 1 showing a conventional structure for preventing deformation of the box, and Fig. 3 shows a structure for preventing deformation of the box according to the present invention. FIG. 2 is a sectional view taken along line AA in FIG. 1; 1...Outer box, 2...Inner box, 3...
... Rigid polyurethane foam, 4 ... Partition plate, 5 ... Locking device mounting screw, 6 ... Partition body, 7 ... Seal plate, 8...Locking tool,
9... Locking piece, 10... Locking piece not attached, 11... Partition body not attached.

Claims (1)

[Scope of utility model registration request] 1. A space is formed by engaging the front flanges of the inner box and the outer box, and the space is filled with a heat insulating material such as rigid polyurethane foam to form a heat insulating box. In a box for a refrigerator or the like which is partitioned into two upper and lower compartments by inserting a partition into the inner surface, an inner box holding part is formed on the back side of the front flange of the outer box, and an inner box holding part is formed at approximately the same position as the insertion part of the partition. Attach one side of a locking piece made of synthetic resin by injection molding etc. to a part of the clamping part, and bring the other side of this locking piece into contact with the back surface of the inner box. A box body for a refrigerator, etc., characterized by a screw-fastened structure that clamps the inner box from the sides. 2. A box body for a refrigerator or the like as set forth in claim 1 of the utility model registration claim, characterized in that the inner box holding portion on the back side of the front flange portion of the outer box is bent into a substantially R-shape.