JPH0682153A - Thermal insulating box - Google Patents

Abstract

PURPOSE:To prevent an occurrence of recess at an outer box opposing against a passage arranged to cause foam resin to be immersed into a thermal insulating member. CONSTITUTION:An inner box 12 having a first box and a second box arranged in side-by-side relation is installed within an outer box 11, and a thermal insulating member 18 is arranged between opposed wall surfaces of the first and second boxes so as to enclose the part between the opposed wall surfaces. The thermal insulating member 18 is formed with feeding holes 19 for use in immersing the foam resin into the thermal insulating member 18 in such a manner that they are inclined from an outside part of the thermal insulating member 18 toward an inside part of it in a flowing direction of the foam resin. Then, an amount of immersion of the foam resin 13 into the thermal insulating member 18 is increased and its charging density can be increased, so that there is no possibility that the part of the outer box opposing against the passage of the thermal insulating member produces the recess.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-insulating box body constituted by filling a foaming resin between an outer box and an inner box, and more particularly, the inner box has first and second box parts arranged side by side. , A heat insulating body is provided between the opposed wall surfaces of the two box portions so as to surround the space between the opposed wall surfaces.

[0002]

2. Description of the Related Art For example, a heat insulation box of a refrigerator is formed by filling a foamable resin between an outer box made of an iron plate and an inner box made of plastic. In this case, a box portion for forming a freezing compartment and a box portion for forming a refrigerating compartment are vertically formed side by side and integrally formed in the inner box. Such an inner box may be integrated with the outer box by the foaming resin after being filled with the foaming resin, but before filling the foaming resin, the inner box is made of plastic and has a high strength. Since it is weak, the portion connecting the two box parts is bent and the space between the two box parts is narrowed, and as a result, the thickness of the partition wall between the freezer compartment and the refrigerating compartment may be reduced. Therefore, a substantially U-shaped heat insulating body is arranged between both box portions of the inner box, and the foaming resin is injected and filled while the space between both box portions is maintained by this heat insulating body. In this case, as shown in FIG. 7, an introduction hole 2 is formed in the heat insulator 1, and the foaming resin is allowed to enter the inside of the heat insulator 1 through the introduction hole 2.

[0003]

However, in the case of the above structure, the portion of the outer box 3 facing the introduction hole 2 formed in the heat insulator 1 is recessed as shown by the broken line in FIG.
There was a problem of impairing the appearance. The reason why such a depression occurs is that since the foamable resin enters the inside of the heat insulating body 1 through the introduction hole 2, the amount of the foamable resin inevitably decreases and the packing density tends to decrease. It is considered that the shrinkage during solidification causes the foamable resin outside the heat insulator 1 to be drawn in, so that the outer box 3 is affected.

The present invention has been made in view of the above circumstances, and an object thereof is to cause a recess in an outer box portion facing a passage provided for allowing a foamable resin to enter the inside of a heat insulator. There is no insulation box provided.

[0005]

According to a first aspect of the present invention, there is provided a heat insulation box body having a passage provided in the heat insulation body for allowing a foamable resin to enter the inside of the heat insulation body from the outside to the inside of the heat insulation body. And is formed so as to be inclined in the flow direction of the foamable resin.

In the heat insulation box body according to a second aspect of the present invention, a passage provided in the heat insulation body for allowing the foaming resin to enter the inside of the heat insulation body is formed at a portion facing a corner portion of the outer box. It is a feature.

[0007]

According to the means of claim 1, since the passage of the heat insulating body is inclined in the flow direction of the foaming resin, the amount of the foaming resin entering the inside of the heat insulating body is increased and the packing density is increased. can do.

According to the second aspect of the present invention, the packing density of the foaming resin inside the heat insulating body is low, and even if the influence extends to the corner portion of the outer box facing the passage, the corner portion is strong. Since it is strong, there is no risk of dents.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 5 by applying it to a heat insulating box of a refrigerator. As shown in FIG. 2, the heat insulation box of the refrigerator is an outer box 1 made of an iron plate.
An inner box 12 made of plastic is arranged in the inside 1, and a foaming resin 13 such as foaming urethane is filled between both boxes 11 and 12. In the inner box 12, a first box part 14 and a second box part 15 are vertically formed side by side and integrally formed, and the inside of the first box part 14 is, for example, a freezing chamber 16 and a second box part. 15
The inside is a refrigerating room 17, for example.

The first and second box parts 14 and 1 described above.
5, the bottom wall 14a of the first box portion 14
As shown in FIG. 3, a heat insulator 18 made of, for example, styrofoam, is disposed between the upper wall 15a of the second box portion 15 and the upper wall 15a of the second box portion 15 in order to maintain the distance between the both walls 14a and 15a. . As shown in FIG. 1, the heat insulating body 18 is formed in a substantially U-shape, and the lower wall 14 of the first box portion 14 is formed.
The space between a and the upper surface wall 15a of the second box portion 15 (which is filled with the foamable resin 13 after being filled with the foamable resin 13) is provided so as to be surrounded by three sides 18a to 18c.

Two opposite sides 18a and 1 of the heat insulating body 18
In the 8c, for example, two introduction holes 19 are formed as passages for allowing the foamable resin 13 to enter the inside of the heat insulating body 18. As shown in FIG. 4, the filling of the foamable resin 18 is performed by laying the outer box 11 sideways so that the upper and lower walls 1 of the outer box 11 are
The stock solution A of the foamable resin 13 is injected from the injection port 20 formed in 1a and 11b. Then, after the undiluted solution A is injected into the outer box 11, the undiluted solution A expands and flows as shown by an arrow B to fill the space between the outer box 11 and the inner box 12.

As shown in FIG. 5, the introduction hole 19 of the heat insulating body 18 extends from the outside to the inside of the heat insulating body 18 in a direction in which the foamable resin 13 flows when the foamable resin 13 is filled, that is, an arrow B. It is formed so as to be inclined in the direction.
In this case, the inclination angle θ of the introduction hole 19 is preferably set to 45 degrees or less. In addition, the opening width W of the introduction hole 19 on the surface of the heat insulator 18 is preferably set to 1/2 or less of T, where T is the size of the gap between the outer box 11 and the heat insulator 18.

In this embodiment having such a structure, when the expandable resin 13 is filled, the expandable resin 13 flows in the direction of the arrow C, but as is apparent from FIG. Since it is formed obliquely upward in the same direction as the flow direction of, the penetration of the foamable resin 13 into the introduction hole 19 is promoted. As a result, the amount of the foamable resin 13 entering the inside of the heat insulator 18 and, consequently, the packing density increase,
The shrinkage during solidification reduces the tendency of the expandable resin 13 existing outside the heat insulator 18 to be drawn into the heat insulator 18. Therefore, it is possible to prevent a recess from being formed in a portion of the outer box 11 facing the introduction hole 19.

FIG. 6 shows another embodiment of the present invention.
In this embodiment, the introduction hole 21 is formed in a portion facing the corner C of the outer box 11, that is, in the corner of the heat insulator 18. In this structure, the filling rate of the foamable resin 13 inside the heat insulator 18 is temporarily reduced, and the foamable resin 13 existing outside the heat insulator 18 is moved to the inside of the heat insulator 18 due to contraction during solidification. Even if the pulling tendency becomes strong, the part of the outer box 11 that receives the pulling force is
Since the corner portion C has a strong strength, the corner portion C
There is no danger of denting.

The present invention is not limited to the embodiment described above and shown in the drawings. For example, the present invention is not limited to a heat insulating box of a refrigerator, but an inner box provided with first and second box parts is an outer box. Various modifications can be made without departing from the gist of the present invention, such as being widely applied to a heat insulating box body configured by being filled with a foamable resin.

[0016]

As described above, according to the present invention, the following effects can be obtained. In the heat-insulating box according to claim 1, the passage provided in the heat-insulating body for allowing the foamable resin to enter the inside of the heat-insulating body is inclined in the flow direction of the foamable resin from the outside to the inside of the heat-insulating body. With this structure, the amount of foaming resin that can enter the inside of the heat insulator increases and the packing density can be increased, so that a recess is created in the portion of the outer box that faces the passage of the heat insulator. There is no fear.

According to another aspect of the present invention, there is provided a heat insulating box, wherein a passage is provided in the heat insulating body for allowing the foaming resin to enter the inside of the heat insulating body at a portion facing a corner portion of the outer box. Even if the packing density of the foamable resin inside the heat insulating body is low, the portion facing the passage of the heat insulating body is the corner portion of the outer box having high strength, so that the corner portion is not dented.

[Brief description of drawings]

1 shows an embodiment of the present invention, which is taken along line I--I of FIG.
Cross-section view along the line

[Fig. 2] Vertical sectional view

FIG. 3 is a perspective view of a main part with a part removed.

FIG. 4 is a schematic vertical cross-sectional view showing a state when the foamable resin is filled.

FIG. 5 is an enlarged cross-sectional view of a main part shown in a state of being filled with a foamable resin.

FIG. 6 is a partial sectional view showing another embodiment of the present invention.

FIG. 7 is a partial cross-sectional view showing a conventional example.

[Explanation of symbols]

11 is an outer box, 12 is an inner box, 13 is a foaming resin, 14 is a first box part, 15 is a second box part, 18 is a heat insulator, and 19 and 21 are introduction holes (passages).

Claims (2)

[Claims] 1. An outer box, an inner box arranged in the outer box and having first and second box portions arranged side by side, and a portion between the opposite wall surfaces between the opposite wall surfaces of the first and second box portions. A heat insulating body disposed so as to surround the heat insulating body, and a foamable resin filled between the outer box and the inner box, wherein the heat insulating body is provided with the foamable resin. A heat insulating box body, characterized in that a passage for entering the inside is formed so as to be inclined from the outside of the heat insulating body toward the inside in the flow direction of the foamable resin. 2. An outer box, an inner box arranged inside the outer box and having first and second box portions arranged side by side, and a portion between the opposite wall surfaces between the opposite wall surfaces of the first and second box portions. A heat insulating body disposed so as to surround the heat insulating body, and a foamable resin filled between the outer box and the inner box, wherein the heat insulating body is provided with the foamable resin. A heat-insulating box body, characterized in that a passage for entering the inside is formed in a portion facing a corner portion of the outer box.