JPS5851585Y2 - Boxes for refrigerators, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a refrigerator box formed by forming a U-shaped bent part on the rear flange of the outer panel and inserting the back plate into the bent part.

This type of conventional refrigerator box is explained with reference to FIGS. 1 and 2. 1 is an outer panel, 2 is a back panel, 3 is an inner box, and 4 is a rigid polyurethane foam.
A flange portion 1a is formed on the back surface of the outer panel 1, and a U-shaped bent portion 1b is formed on the inside of the flange portion 1a.
An L-shaped bent portion 2a is formed at the end.

In such a configuration, the front flange of the outer plate 1 and the front flange of the inner box 3 are engaged, and the L-shaped bent part 2a of the back plate 2 is inserted into the U-shaped bent part 1b. , a back plate 2 and an inner box 3 form a space, and this space is filled with rigid polyurethane foam 4 to form a box body.

Such a back plate 2 is normally manufactured from a galvanized iron plate or the like with a thickness of about 0.5 to 0.8 mm, but from the viewpoint of resource saving, this thickness is reduced to about 0.3 to 9.4 mm. There are cases.

The back plate 2 requires a moving process in the process of manufacturing it as a single item and in the process of assembling it into the outer plate 1, but the thickness of the back plate 2 is set to 0.3 to 0.
If the thickness is approximately 4 mm, buckling may occur at the starting point of the L-shaped bent portion 2a due to its own weight during this process, making it impossible to insert it into the U-shaped bent portion 1b, or requiring correction of the buckling. Additional costs will be incurred.

In addition, such a structure has an L-shaped bent portion 2 on the U-shaped bent portion 1b.
A is inserted to create a gap 1C, and the rigid polyurethane foam 4 that has gone over the end of the L-shaped bent part 2a is stored in this gap 1C, but when the amount of rigid polyurethane foam 4 to be injected is large. In this case, it may not be possible to store it completely in the gap 1C, and it may leak to the outside.
This requires rework costs, and together with the above, it becomes a defect that increases manufacturing costs.

In view of the above, the present invention was developed to reduce the thickness of the back plate and at the same time to prevent leakage of rigid polyurethane foam.

Embodiments of the present invention will be explained with reference to FIGS. 3 to 5, and the same reference numerals as in the prior art indicate the same parts.

6 is a back plate, and the end face has a first curved part 6f, a second curved part 6g,
A stepped bent portion 6b is formed by bending at the third bent portion 6h.

Therefore, the end face of this back plate 6 is formed with a first face 6j, a second face 6C1, and a parallel face 6k, which are substantially perpendicular to the back face.

When the back plate 6 is inserted into the U-shaped bent portion 1b, the U-shaped bent portion 1b, the first surface 2J, and the parallel surface 2 form a lamp chamber 5.

In such a configuration, the front flange of the outer panel 1 and the inner box 3
The stepped portion 6b of the back plate 6 is inserted into the U-shaped bent portion 1b to form a space with the outer plate 1, the back plate 6, and the inner box 3. A box is formed by filling polyurethane foam 4.

Such a back plate 6 has a first curved portion 6f and a second curved portion 6g on the end surface.
, since it is bent at the third bent portion 6h to form the step bent portion 6b, the section modulus is larger than that of the L-shaped bent shape, and the plate thickness is 0.
Even if it is about 3 to 0.4 mm, buckling will not occur in this part due to its own weight during the manufacturing process.

In addition, when the stepped portion 6b of the back plate 6 is inserted into the U-shaped bent portion 1b, a gap portion 1C is formed between the U-shaped bent portion 1b and the second surface 6C, and further the first surface 6J, Light chamber 5 on parallel plane 6
The rigid polyurethane foam 4 that has climbed over the end face of the second surface 6C first passes through the gap 1C, but the resistance at this time relieves the foam growth force, and further
A pressure drop occurs at the time of flow into the lamp chamber 5 having a volume larger than C, and after completely sealing the lamp chamber 5, it flows outside through the gap between the outer forming part of the U-shaped bent part 1b and the back plate 6. There is no protrusion, so there is no need for finishing costs.

In order to further improve prevention of buckling at the end of the back plate 6, it is also effective to form a local aperture 6d in the first curved portion 6f or to form a local aperture 6e in the third curved portion 6h.

As described above, the present invention has a conventional structure in which the back plate is inserted into the U-shaped bent part formed inside the back flange of the outer plate, but only an L-shaped bent part is formed at the end of the back plate. When reducing the plate thickness, buckling may occur and rework may be required.
For rigid polyurethane foam leakage, the storage capacity in the gap formed by the U-shaped bend and the L-shaped bend is small, making it impossible to completely prevent leakage and requiring finishing costs. This can be effectively removed by forming a stepped portion at the end.

[Brief explanation of drawings]

Figure 1 is a back view of the refrigerator, and Figure 2 is the first diagram showing the conventional structure.
Figure 3 is a cross-sectional view equivalent to A-A in Figure 1, showing the structure of the present invention, Figure 4 is a cross-sectional view showing the end of the back plate of the present invention, Figure 5 is a front view of FIG. 4. 1... Outer plate, 1a... Back flange,
1b... U-shaped bent part, 1C... Gap part, 3... Inner box, 4... Rigid polyurethane foam, 2...・・Back plate, 2a・・・・
・L-shaped bent part, 2b... Stepped part, 2C...
...Second surface, 2d...Local aperture, 2e...
...Local aperture, 2f...1st music section, 2g...
...2nd song part, 2h...3rd song part, 2J...
...1st side, 2k...parallel side, 5...
...Light room.

Claims (1)

[Scope of utility model registration request] 1. In a box body such as a refrigerator, which is formed by forming a U-shaped bent portion 1b inside the back flange portion 1a of the outer panel 1 and inserting an end of the back plate 6 into the U-shaped bent portion 1b, A first curved portion 6f, a second curved portion 6g, and a third curved portion 6 are provided at the end of the back plate 6.
A box body for a refrigerator, etc., characterized by having a stepped portion 6b bent at a shape of h. 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 first curved portion 6f of the back plate 6 is formed with a local aperture 6d. 3. A box body for a refrigerator or the like according to claim 1 of the registered utility model, characterized in that a local aperture 6e is formed in the third curved portion 6h of the back plate 6. 4. U-shaped bent portion 1b of the outer panel 1 and step bent portion 6b of the back panel 6
A box for a refrigerator or the like according to claim 1, characterized in that a cavity 5 made of rigid polyurethane foam 4 is formed in the gap between the housing and the housing.