JPS6115502Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a heat insulating box used for refrigerators, etc.
In particular, the present invention relates to a heat insulating box suitable for use in refrigerators that are installed with the back surface of the refrigerator body tightly pressed against a wall, and which have a heat dissipation duct on the back surface.

Conventionally, this type of insulating box body has an inner box and an outer box forming an insulating space, and a circular injection port for a foam insulation material such as foamed urethane is provided at a predetermined position on the back of the outer box, and the injection port is filled with foam insulation. A thin plate with elasticity that closes after injection of the material is attached, and the foamed insulation material is injected from the injection port by pressing the thin plate of the injection port with an injection cylinder, and then the foamed insulation material is foamed from the injection port. The leak is sealed by pressing the box plate against the edge of the injection port using foaming pressure from inside.

If the insulating box is formed as described above, the outer box is large, and a large mold or press is required to provide the injection port at a predetermined position on the back of the outer box. Since the outer box is large, attaching (pasting) the box board that closes the injection port has the disadvantage of inefficiency and overall high cost.

The present invention relates to a heat insulating box that eliminates the above-mentioned drawbacks.

Hereinafter, a case where an embodiment of the heat insulating box of the present invention is implemented as a heat insulating box having a heat dissipation duct on the back side will be described with reference to the drawings.

The heat insulating box of the present invention has an inner box 1 made of plastic or the like, and a back plate 2 made of a paper sheet or the like to form only the back side, and the other side plates 3 are made of iron plates or the like. A heat insulating space 6 is formed by an outer box 5 formed by fixing a support angle 4 having an L-shaped cross section to the rear inner surface, and an inlet of a foam heat insulating board 7 is positioned at a predetermined position on the back plate 2 of the outer box 5. 8 and a box plate 9 having elasticity that closes the injection port 8 after injection of the foamed heat insulating material 7. An injection port plate 10 is attached so as to bridge the support angle 4, and 2 and press it with a jig so that it comes into contact with the horizontal surface of the angle 4, and
The back plate 2 where the injection port 8 of No. 0 is located is broken with an injection cylinder of the foam insulation material 7, and the thin plate 9 of the injection port 8 is pressed with the injection cylinder to inject the foam insulation material 7 into the insulation space 6. Thereafter, foam leakage of the foamed heat insulating material 7 from the injection port 8 is closed by pressing a thin plate 9 against the edge of the injection port 8 using foaming pressure from the inside.

In the above case, the inlet plate 10 is constructed separately from the outer box 5, and a large mold or press machine is not required to manufacture the inlet plate 10, which facilitates manufacturing. If the width of the back of the body is the same, it can be used in common, and it also works to prevent the sheet-like back plate 2 from dripping, and also prevents the foam insulation material on the back plate 2 from shrinking in the width direction. can do.

The present invention provides an insulating box body made by injecting a foamed heat insulating material into a space surrounded by an inner box and an outer box, in which the back surface of the outer box is formed with a single sheet-like backing plate, and this sheet An inlet plate having an inlet is installed between both side plates of the outer box along the inner surface of the shaped back plate, and a thin plate that is closed after injection of the foam insulation material is arranged on the inner side of the inlet plate. Since it is formed by injecting the foamed heat insulating material into the heat insulating space through the injection port through the back plate, it is easy to install and align the back plate, and the number of parts is small, making it possible to reduce costs. .

[Brief description of the drawings]

Fig. 1 is an external perspective view showing an embodiment of the heat insulating box of the present invention, Fig. 2 is a sectional view of the main part of Fig. 1, and Fig. 3 is an enlarged sectional view of the main part of part a of Fig. 2. 4 is a perspective view of the inlet plate of FIG. 1; FIG. In the drawings, 1 is an inner box, 2 is a back plate, 5 is an outer box, 6 is a heat insulating space, 8 is an injection port, 9 is a thin plate, and 10 is an injection port plate.

Claims (1)

[Scope of Claim for Utility Model Registration] In an insulating box body formed by injecting foam insulation material into a space surrounded by an inner box and an outer box, the back surface of the outer box is formed of a single sheet-like backing plate. At the same time, an inlet plate having an inlet is installed between both side plates of the outer box along the inner surface of this sheet-like back plate, and a thin plate that is closed after injection of the foam insulation material is arranged on the inner surface of this inlet plate. The insulation box is formed by injecting a foamed heat insulating material into the insulation space through the injection port through the back plate.