JP2518524Y2 - Insulated box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to the structure of a heat insulating box used as a housing of a refrigerator or the like.

[Prior Art] FIGS. 3 to 6 show the structure of a conventional heat insulating box of this type.

The heat insulation box 1 shown in the figure has an outer box 2 having a substantially U-shaped cross section and an opening on the front surface, a back plate 9 (see FIG. 5),
A thin plate made of synthetic resin or the like is integrally molded into a substantially U-shaped cross section, and an inner box 3 having an opening on the front surface is provided.
A foam insulation material 4 (for example, hard urethane foam) is filled in a space formed by combining the outer box 2, the inner box 3 and the back plate 9.

Partition walls 5a and 5b are attached to the inside of the inner box 3,
The internal space of the heat insulating box 1 is divided in the vertical direction to form a plurality of storage chambers. Hinge fixing plates 6a and 6b are attached to the front surfaces of the partition walls 5a and 5b.
On the back surface of the inner box 3 between a and 6b, reinforcing plates 7a and 7b having a substantially U-shaped cross section or a substantially L shape are provided along the left and right side surfaces. And the reinforcing plates 7a, 7b
Both ends of the above are integrally connected to the hinge fixing plates 6a and 6b by screws.

The reinforcing plates 7a, 7b serve to position the hinge fixing plates 6a, 6b in the vertical pitch and to secure the rigidity of the heat insulating box 1, and are usually made of a thin metal plate. Use it, and at both ends in the longitudinal direction, bent pieces 8 in an L shape.
Are formed.

When injecting and foaming the foamed heat insulating material 4 into the frame constructed as described above, as shown in FIG. 5, the foamed heat insulating material 4 is injected from the injection port 10 provided in the back plate 9 by the foaming machine 11. The stock solution is discharged into the space of the frame. The foamed heat insulating material 4 discharged into the space of the frame as described above fills the space of the frame with the start of the foaming / polymerization reaction, and the heat insulating box 1 is formed.

[Problems to be solved by the device]

In the conventional heat insulating box 1 formed by the above procedure, the foam is formed in the space from a direction substantially perpendicular to the bending piece 8 formed in the longitudinal direction along the surface of the inner box 3. Since the heat insulating material 4 is filled, the flow of the undiluted solution of the foamed heat insulating material 4 is obstructed by the bent piece 8, the foaming density near the bent piece 8 becomes high, and the amount of the undiluted solution used increases. Alternatively, there is a problem that the filling property of the foamed heat insulating material 4 is obstructed and voids are easily generated, and the heat insulating effect is reduced.

Therefore, an object of the present invention is to provide a heat insulating material that is foamed with a uniform density, while ensuring the dimensional accuracy and rigidity of the heat insulating box, and having excellent fluidity when filling the foam heat insulating material. The purpose of the present invention is to provide a heat insulating box having a structure.

[Means for solving the problem]

In order to achieve the above-mentioned object, the main means adopted by the present invention is to form a space by combining an inner box and an outer box having a substantially U-shaped cross section and forming a space in the space. A heat-insulating box in which a flat plate-shaped reinforcing member having reinforcing ribs in the longitudinal direction is arranged along the surface of the inner box, and the space is filled with a foamed heat insulating material from a direction substantially perpendicular to the longitudinal direction of the reinforcing member. In the body, the cross-sectional shape of the reinforcing rib is a substantially V shape having a surface inclined with respect to the filling direction of the foam heat insulating material, and the reinforcing rib has two rows in the filling direction of the foam heat insulating material. It is the heat insulation box which concerns on the point formed.

[Action]

According to the heat insulation box of the present invention, since the filled foam insulation material smoothly wraps around the V-shaped reinforcing rib along the inclined surface inclined with respect to the filling material flowing direction, to the opposite side of the reinforcing rib, It is foamed with a uniform density in the space. In particular, this V-shaped reinforcing rib is 2 in the filling direction of the foam insulation material.
Since the ribs are formed in rows, the rigidity is increased, and the height of the reinforcing ribs can be reduced accordingly, and the flow of the heat insulating material is further smoothed, which is a remarkable effect.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. It should be noted that the following embodiments are examples of embodying the present invention and are not of the nature to limit the technical scope of the present invention.

Here, FIG. 1 is an exploded perspective view of a main part of a heat insulating box according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the main part of the heat insulating box.

Further, elements common to those of the conventional heat insulating box body 1 shown in FIGS. 3 to 6 will be described using the same reference numerals.

As shown in FIGS. 1 and 2, the heat insulating box 1'according to this embodiment has substantially the same basic structure as the conventional heat insulating box 1.

The features of the structure of this embodiment will be described below along with a detailed description of the main parts.

That is, two flange portions 13 and 14 are formed around the front opening of the outer box 2 so as to project inward along the opening surface. The flange portion 13 is formed by bending the opening-side tip edge portion of the outer box 2 inward along the opening surface and folding it back, and the tip end extends rearward along each surface. In addition, the flange portion 14 is formed by standing up and bending inward. As a result, the cross section is formed in a substantially U shape, and the fitting groove 15 is formed by this portion. A flange 16 is formed on the peripheral edge of the front opening of the inner box 3 so as to project outward along the opening. Above flange 16
Is bent and formed in a substantially U-shaped cross section with its front side opened.

Partition walls 5a and 5b are attached to the inside of the inner box 3, and the inside of the heat insulating box 1'is vertically divided to form a plurality of storage chambers. And the above partition wall 5
Hinge fixing plates 6a and 6b are attached to the front surfaces of a and 5b, respectively.

The hinge fixing plates 6a and 6b are intended for positioning the left and right side surfaces of the outer box 2 (that is, determining the width of the heat insulating box 1 ') and strengthening the rigidity of the heat insulating box 1'. The partition walls 5a, 5 are formed integrally with the left and right objects by screws 17
It is attached to b. Then, each front surface thereof is covered with the decorative plates 12a and 12b.

Between the partition walls 5a, 5b on the left and right sides of the back surface of the inner box 3 (the side of the space formed by combining the outer box 2 and the inner box 3), the flat plate-shaped reinforcing plates 19, 19 ( Reinforcing member) is provided, and on both side edges in the longitudinal direction of each reinforcing plate 19,
A pair of parallel, substantially V-shaped reinforcing ribs 18, 18 having a cross-sectional shape inclined with respect to the filling direction of the foamed heat insulating material 4 are integrally formed by bending. Further, the reinforcing plate 19 has its longitudinal end portions between the pair of reinforcing ribs 18, 18 and the connecting portions 20a, 20b extending rearward near the left and right end portions of the hinge fixing plates 6a, 6b. The inner box 3 is integrally connected and fixed by screws 21 attached to the inner box 3.

Then, a frame body is formed by fitting the flange portion 16 of the inner box 3 into the fitting groove 15 of the outer box 2, and the injection port of the rear plate 9 (see FIG. 5) is provided in the space of the frame body. By filling the foamed heat insulating body 4 from 10, the heat insulating box body 1 ′ is formed.

When the foam heat insulating material 4 is filled in the space of the frame, the reinforcing rib 18 has a surface inclined with respect to the filling direction of the foam heat insulating material 4. Since the undiluted solution of No. 4 smoothly wraps around to the opposite side of the reinforcing rib 18, a heat insulating material foamed with a uniform density is provided in the space. Further, since the reinforcing ribs 18 are provided in two rows in the filling direction of the heat insulating material, the rigidity thereof is remarkably enhanced. As a result, even if the height of the V-shaped reinforcing rib 18 is lowered, the reinforcing rib 18 has sufficient strength as a reinforcing material for the heat insulating box. Thus, in this embodiment, the reinforcing rib 18
Since the height of the foam insulation can be lowered, the effect that the flow of the foam insulation becomes smoother can be expected.

Since the fluidity of the foamed heat insulating material 4 is improved as described above, the injection amount of the foamed heat insulating material 4 can be reduced and the cost can be reduced. Since the reinforcing rib 18 has a V-shaped cross section,
As described above, as compared with the L-shaped bent piece 8 (see FIG. 6) in the conventional structure, its section modulus becomes larger and the strength is also improved.

Needless to say, in the above structure, the dimensional accuracy of the heat insulating box 1'can be ensured in the same manner as in the conventional heat insulating box 1.

[Effect of device]

As described above, the present invention forms a space by combining an inner box and an outer box having a substantially U-shaped cross section, and has a reinforcing rib in the longitudinal direction along the surface of the inner box in the space. In a heat-insulating box body in which a flat plate-shaped reinforcing member is arranged and the space is filled with a foam insulating material from a direction substantially perpendicular to the longitudinal direction of the reinforcing member, the cross-sectional shape of the reinforcing rib is the foam insulating A heat insulating box body having a substantially V shape having a surface inclined with respect to the filling direction of the material and having the reinforcing ribs formed in two rows in the filling direction of the foamed heat insulating material. Therefore, while ensuring the dimensional accuracy and rigidity of the heat insulating box, it is possible to improve the fluidity at the time of filling the foam heat insulating material and form the heat insulating material foamed with a uniform density. Further, in the present invention, since the reinforcing ribs are formed in two rows, the rigidity thereof is remarkably enhanced, so that the reinforcing ribs can be made small, and therefore, sufficient rigidity can be maintained even if the height of the reinforcing ribs is made small. As a result, the smoothing of the flow of the heat insulating material at the time of filling the heat insulating material can be further improved, and the homogenization of the foamed heat insulating material has been dramatically improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a heat insulating box according to an embodiment of the present invention, FIG. 2 is a side sectional view of the heat insulating box, and FIG. 3 is a background view of the present invention. Fig. 4 is a perspective view showing an example of a heat insulating box, Fig. 4 is an exploded perspective view of a conventional heat insulating box, and Fig. 5 is an explanation of filling the conventional heat insulating box with a foamed heat insulating material. FIG. 6 is a side sectional view of the main part of the conventional heat insulating box. [Explanation of symbols] 1 '... Insulation box body, 2 ... Outer box 3 ... Inner box, 4 ... Foam insulation 9 ... Back plate, 10 ... Filling port 18 ... Reinforcing rib 19 ... Reinforcing Plate (reinforcing member)

Claims (1)

(57) [Scope of utility model registration request] 1. A flat plate-shaped reinforcement having a rib formed in a longitudinal direction along a surface of the inner box in the space by combining an inner box and an outer box having a substantially U-shaped cross section. In a heat-insulating box body in which members are arranged and the space is filled with a foamed heat insulating material from a direction substantially perpendicular to the longitudinal direction of the reinforcing member, the cross-sectional shape of the reinforcing rib is defined by the filling direction of the foamed heat insulating material. It has a substantially V shape with a surface inclined with respect to
A heat insulating box body, wherein the reinforcing ribs are formed in two rows in a filling direction of the foamed heat insulating material.