JPH0465313B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention provides a method for forming a heat insulating box for a refrigerator, in which a heat insulating material is filled between an inner box and a ceiling plate of a refrigerator body to form a heat insulating box. It is related to.

[Conventional technology]

Conventionally, as a method of forming this type of insulating box for a refrigerator, the method shown in FIGS. 3 to 6 is known (see Japanese Utility Model Application No. 58-8093).

That is, FIG. 3 is a diagram showing a longitudinal cross section of a heat insulating box, and in the figure, 1 is a box, which is formed by filling a heat insulating material 4 between an outer box 2 and an inner box 3 of the refrigerator body. ing.

FIG. 4 is an exploded perspective view showing details of the box 1. The outer box 2 has an opening 2a on the top surface,
A U-shaped opening 2b with an open top is formed at the front, and a bag-shaped flange 2c is provided at the front (front). The inner box 3 inserted from the top opening 2a of the outer box 2 has an annular flange 3a, and the upper end of a flange 5a provided on the front surface of the outer plate 5 of the outer box 2. A ceiling plate 6 is attached to the upper part of the outer panel 5 so as to protrude forward from the portion 5b.

The refrigerator box 1 constructed as described above is filled with a heat insulating material 4, and a front beam 7 is interposed between the inner box 3 and the ceiling plate 6 as shown in FIG. The front spar 7 that connects the upper front end of the outer box 2, which is formed in the shape of an inverted gate, has a substantially U-shaped cross section and has a bag-shaped portion 7a on the front surface. Then, the annular flange 3a of the inner box 3 abuts on the inside of the bag-shaped portion 7a of the front spar 7, and the flange 7b of the front spar 7, which has a U-shaped cross section, abuts against the extension tongue piece 6a of the ceiling plate 6. In this state, as shown in the figure, a cushioning material 8 such as styrofoam is inserted inside the front spar 7, and the space between the inner box 3 and the ceiling plate 6 is sealed and fixed. Thereafter, as described above, a heat insulating material 4 such as urethane foam is filled, thereby forming the heat insulating box 1 of the refrigerator. FIG. 6 is an exploded perspective view showing the above-mentioned formation process. Note that the front portion 6b of the ceiling plate 6, which is formed in a U-shaped cross section, protrudes to the same extent as the front surface of the opening/closing door 9 that covers the front opening of the box body 1.

[Problem that the invention seeks to solve]

However, in the above-described method of forming a heat insulating box for a refrigerator, the front spar 7 is formed to have a U-shaped cross section, and the cushioning material 8 is inserted inside to seal the front spar 7. The amount of material used and the number of processing steps are large, the mold cost is high, and the use of the cushioning material 8 is expensive. There was a problem that assembly workability was poor because it was inserted.

The present invention has been made in view of these problems and provides a method for forming a heat insulating box for a refrigerator that is inexpensive and easy to assemble.

[Means for solving problems]

A method for forming a heat insulating box for a refrigerator according to the present invention includes a method for forming a heat insulating box in which a front spar is interposed between an inner box and a ceiling plate of a refrigerator main body to form a heat insulating box. A front spar is formed which has a flange having a substantially L-shaped cross section with fixed from the inside, with the extension tongue piece of the ceiling plate facing the end face of the flange of the front spar,
In this state, a heat insulating material is filled between the inner box and the ceiling plate to connect them.

[Effect]

Since the front spar is formed with a roughly L-shaped cross section, the amount of material used and the number of processes are small, and the flange of the inner box is brought into contact with the inside of the bag-shaped part of the front spar, and both are sealed with tape. Therefore, no cushioning material is required, making it inexpensive and easy to work with.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing the main parts of a heat insulating box formed according to the present invention, and the same parts as in the conventional case are given the same reference numerals and redundant explanation will be omitted. The front spar 7 is formed to have a substantially L-shaped cross section, and has a front bag-shaped portion 7a and a flange 7c that has a substantially L-shaped cross section. The flange of the inner box 3, that is, the annular flange 3a comes into contact with the inside of the bag-shaped part 7a of the front spar 7, and the craft tape 10
Fixed by

FIG. 2 is an exploded perspective view showing the forming process, in which the annular flange 3a of the inner box 3 is brought into contact with the inside of the bag-like part 7a of the front spar 7, which is formed into a substantially L-shaped cross section as described above. , In this state, use the craft tape 10 to close the inner box 3.
and front spar 7 from the inside. Then, the extension tongue piece 6a of the ceiling plate 6 is brought into contact with the end face of the flange 7c of the front spar 7, and in this state, a heat insulating material 4 such as foamed urethane is filled between the inner box 3 and the ceiling plate 6 to connect them. let That is, after inserting the inner box 3 into the outer box 2, the front spar 7
With the tape attached, apply craft tape 1 from the rear.
0 is attached from the back side of the flange 7c having a substantially L-shaped cross section so as to seal and fix the annular flange 3a on the top side of the inner box 3, and then the ceiling plate 6 is inserted and fitted from above.

In this way, the heat insulating box is formed, but since the cross-sectional shape of the front girder 7 is L-shaped, the amount of material used and the number of processing steps are smaller than in the past, and the cost is low because no cushioning material is used. Since the craft tape 10 is used, it can be formed at low cost and the workability is improved.

〔Effect of the invention〕

As explained above, according to the present invention, the front spar is formed to have a substantially L-shaped cross section, the flange of the inner box and the front spar are fixed with tape, and the front spar is filled with heat insulating material. The amount of materials used and the number of processing steps are reduced, and since no cushioning material is used, the product is inexpensive, and the assembly workability is improved.

[Brief explanation of drawings]

Figures 1 and 2 are views showing one embodiment of the present invention, with Figure 1 being a sectional view showing the main parts of the heat insulating box, Figure 2 being an exploded perspective view showing the process of forming the box, and Figure 3 being an exploded perspective view showing the formation process. is a sectional view showing the shape of the heat insulating box, FIG. 4 is an exploded perspective view showing the main parts thereof, FIG. 5 is a sectional view showing the main parts of a conventional heat insulating box, and FIG. 6 shows the formation process. It is an exploded perspective view. 1...Box body, 2...Outer box, 3...Inner box, 3a...
...Annular flange, 4...Insulating material, 5...Outer plate, 6...
Ceiling board, 7... Front spar, 7a... Bag-shaped portion, 7c...
A flange having a substantially L-shaped cross section, 10...Craft tape, and the same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A method for forming a heat insulating box in which a front spar is interposed between the inner box and the ceiling plate of the refrigerator body to form a heat insulating box, which has a flange having a substantially L-shaped cross section with a bag-shaped portion on the front surface. A front spar is formed, and the inner box and front spar are fixed from the inside with tape with the annular flange of the inner box in contact with the inside of the bag-shaped part of the front spar, and the extension tongue piece of the ceiling board is fixed. A method of forming a heat insulating box for a refrigerator, characterized in that the inner box and the ceiling plate are connected to each other by being filled with a heat insulating material between the inner box and the ceiling plate while facing the end face of the flange of the front spar.