JPS60159577A - Manufacture of refrigeration cold-storage showcase - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a method for manufacturing a frozen/refrigerated showcase, and in particular, an inner box for substantially storing a substance in an outer box defining an outer shell. When manufacturing a showcase body in which these are inserted and integrally connected at the front part,
This invention relates to a method for manufacturing a freezer/refrigerator showcase that is inexpensive and has good assembly workability, in which the inner box can be easily connected by simply inserting the inner box into the outer box from the back side.

[Technical background of the invention and its problems] Conventionally, when manufacturing the main body of a refrigerated refrigerator showcase, as shown in FIGS. 1 and 2, the inner box a is vacuum-integrated with resin, A flange C extending radially outward was formed along the opening peripheral edge of the front surface thereof. On the other hand, as shown in FIGS. 3 and 4, the outer box d is formed with a flange f that is folded back inward in the radial direction along the opening periphery e on the front surface of the outer box d. a
An engagement groove was provided in which the flange C was engaged.

The connection between the inner box a and the outer box d is achieved by curving the inner box a in its longitudinal direction, as shown in FIGS.
from the front of the inner box a, and insert the flange C of the inner box a into the outer box d.
This was done by engaging with the engaging groove Q of the.

By the way, in order to combine the inner box a and the outer box d, for products that are produced manually, such as refrigerators, a large amount of capital investment is made in the production line, and an automatic assembly machine is introduced. The inner box a and the outer box d were connected by a machine. However, since such equipment investment is not possible for products that are produced in small quantities, such as frozen and refrigerated showcases, the inner box a is inserted into or engaged with the outer box d while being manually hammered with a hammer or the like. For this reason, the workability is poor and requires skill, and the inner box a is easily cracked.
In addition, since the engagement groove f of the outer box d is integrally molded with the flange e, its shape is complicated, and the mold cost is high, making it unsuitable for small-volume production. In view of the above-mentioned problems, it was devised to effectively solve them.

An object of the present invention is to manufacture a main body of a refrigerated/refrigerated showcase that can be easily and reliably joined by simply inserting an inner box into an outer box from the back side, and is inexpensive and easy to assemble. The purpose is to provide a method.

[Summary of the Invention] The present invention forms an inner box having an open front surface and a flange extending radially outward along the periphery of the opening, and a heat insulating material is provided on the outer side of the inner box. A method for producing a refrigerated freezer showcase comprising an outer box that covers a packed layer with a predetermined gap therebetween and that is engaged with the flange, the outer box having its back side opened. After molding and forming an engagement flange extending radially inward on the peripheral edge of the front opening, and forming a raised piece on the inside of the engagement flange at a predetermined gap, the outer box is removed. Insert the inner box through the rear opening of the inner box, push the flange of the inner box over the raised piece, engage and hold it between the raised piece and the engaging flange, and then insert the inner box into the rear opening of the outer box. The above-mentioned object is achieved by the feature that a rear plate is attached and a number is attached to close the cover.

Embodiments of the Invention] A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 7 shows the appearance of the freezer/refrigerator showcase 1.

As shown in the figure, the freezer/refrigerator showcase 1 has a main body 2 with an open front, and doors 3, 3, forming openings 4 for putting in and taking out stored items. The main body 2 mainly consists of an outer box 5 made of a steel plate that defines the outer shell and an inner box 6 made of resin that essentially stores the substance. When combined, the outer box 5 is formed to cover the inner box 5 and have a predetermined gap therebetween to form a filled layer of heat insulating material on the outer side of the inner box 6.

According to the method for manufacturing a refrigerated/refrigerated showcase according to the present invention, first, the inner box 6 and the outer box 5 that constitute the main body 2 of the showcase 1 are formed as shown in FIGS. 8 and 10. . As shown in FIG. 8, the inner box 6 has an open front surface, and is provided with a flange 8 extending radially outward along the peripheral edge 7 of the front opening 27. Vacuum integrally formed. As shown in FIG. 9, the flange 8 has a tip 10 extending further rearward to form a -UL shape, and a corner 11 of the flange 8 is formed into an arc with a slight radius.

On the other hand, as shown in FIG. 10, the outer box 5 is open at its front, and the inner box 6 is not inserted into the outer box 5 from its back side due to its front opening 28. The front part 12 is opened and formed from a steel plate. At the peripheral edge 27 of the front opening 28 of the outer box 5, there is an engagement flange that is folded back and extended radially inward along the peripheral edge 27, and is engaged with the flange 8 of the inner box 6. 13 is formed. As shown in FIG. 11, the distal end 14 of this engagement flange 13 is further folded back and formed into a hemmed hem 15.

Further, a raised piece 17 is provided on the inner wall 16 of the outer box 5 so as to be able to protrude and retract inward in the radial direction at a predetermined distance from the inner side 18 of the engagement flange 13. In the illustrated example of the raised piece 17, a plate-shaped metal fitting 19 is raised in a square shape and spot welded to the inner wall 16 of the outer box 5, and the raised portion 20 is given elastic force.

When the outer box 5 and the inner box 6 are formed as described above, as shown in FIG. 23
This cord heater 23 is attached to the corner portion 2.
2 is fixed by a sealing material 24 having cushioning properties such as soft urethane foam, and this sealing material 24 serves as a seal between the flange 8 of the inner box 6 and the engaging flange 13 of the outer box 5. It is provided.

After the sticker 24 has been pasted, the inner box 6 is inserted into the outer box 5 through the opening in the back side 12 of the outer box 5, as shown in FIG. When the inner box 6 is inserted into the outer box 5 from the front opening 27 side, the flange 8 of the inner box 6 compresses the raised piece 17 and overcomes it, as shown in FIGS. 13 to 14. , is brought into contact with the engagement flange 13 of the outer box 5 via the sealing material 24. The raised piece 1 compressed at this time
7 tries to return to its original state, and in the middle of this state presses the tip 10 of the flange 8 of the inner box 6 to fix it. That is, the flange 8 of the inner box 6 is connected to the raised piece 17 and the outer box 5.
The inner box 6 and the outer box 5 are joined by being engaged and fixed between the engaging flange 13 of the inner box 6 and the outer box 5.

After the inner box 6 and outer box 5 are combined, a resin heat insulating material 25 such as urethane is foamed and injected into the gap S formed as a filled layer of heat insulating material.
As shown in the figure, a back plate 26 is attached to the opening of the back part 12 of the outer box 5 to close it, and the main body of the freezer/refrigerator showcase 1 is integrally manufactured.

Next, the operation of this embodiment will be explained. As is clear from the above description, according to the method for manufacturing a frozen/refrigerated showcase of the present invention, the inner box 6 and the outer box 5 that constitute the main body 2 of the showcase 1 are arranged so that the inner box 6 is inside the outer box 5. It is possible to easily and reliably connect the housing ( ) inserted from the rear part 12 into the housing, which greatly improves assembly workability and productivity. Furthermore, the shape of the engaging flange 8 of the outer box 5 is simple, and the molding cost can be reduced.

Then, as shown in FIG. 14, the sealing material 24 is strongly pressed against the flange 8 of the inner box 6 and the tip of the raised piece 17, and at the same time the inner box 6 is fixed, the cord heater 23 is further pressed down. The heat insulating material 2, such as urethane, is foamed and injected by shrinking the sealing material 24 and improving heat conduction.
5 seal is ensured.

Further, since the corner portion 11 of the flange 8 of the inner box 6 is formed in an arc shape, the inner box 6 can be easily inserted.

The sealing material 24 will not be damaged or peeled off during insertion.

[Effects of the Invention] In summary, the present invention exhibits the following excellent effects.

(1) An engaging flange against which the flange of the inner box abuts is formed on the opening periphery of the outer box front surface in a manner corresponding to the flange formed on the opening periphery of the front surface of the inner box, and the engagement flange and A raised piece is installed on the inner wall of the outer box at a predetermined gap, and the inner box is inserted from the back side of the outer box so that the flange A is engaged and held between the engaging flange and the raised piece. Therefore, simply by inserting the inner box from the back side of the outer box, they can be easily and reliably connected.

(2) As a result, the ease of assembling the freezer/refrigerator showcase body is greatly improved, and the flange shape of the outer box is simplified, which reduces mold costs, making it possible to reduce manufacturing costs as much as possible. .

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional inner box, and Figure 2 is the same as Figure 1.
-■ Cross-sectional view taken along the line; Figure 3 is a perspective view showing a conventional outer box;
Fig. 4 is a sectional view taken along the line IV-IV in Fig. 3, Fig. 5 is a perspective view for explaining a conventional method of combining an outer box and an inner box, and Fig. 6 is a cross-sectional view of a conventional outer box and an inner box. FIG. 7 is a partial cross-sectional view showing the state in which the inner box is combined, FIG. 7 is a perspective view showing the external appearance of the refrigerated showcase, and FIG. Perspective view showing the box, No. 9
The figure is a cross-sectional view taken along the line IX-IX in FIG. -XI
A sectional view taken along the line, FIG. 12 illustrates a method of joining an inner box and an outer box according to the method of manufacturing a refrigerated showcase according to the present invention.
FIG. 13 is a perspective view for clarity; FIG. 13 is a partial cross-sectional view showing the state of connection between the inner box and outer case; and FIG. . In the figure, 1 is a frozen/refrigerated showcase, d, 5 is an outer box, a,
5 is the inner box, b, 7 is the opening periphery of the inner box, 0.8 is the flange, 12 is the back side of the outer box, 13 is the engagement flange, 16 is the inner wall of the outer box, 17 is the raised piece, 26 is the back 27 is a front opening of the inner box, 28 is a front opening of the outer box, 29 is a peripheral edge of the front opening of the outer box, and S is a gap as a filling layer of a heat insulating material. Representative Patent Attorney Nobuo Kinutani Nobuo Higashi 6A

Claims (1)

[Claims] forming an inner box having an open front surface and a flange extending radially outward along the periphery of the opening;
In a method for manufacturing a refrigerated freezer showcase, the method comprises forming an outer box that covers the inner box with a predetermined gap to form a filled JR layer of heat insulating material on the outer side of the inner box and is engaged with the flange, The outer box is formed with its back side opened and lowered, and an engagement flange extending radially inward is formed at the peripheral edge of the front opening, and a predetermined gap is formed inside the engagement flange. After forming a raised piece separating the outer box, an inner box is inserted from the rear opening of the outer box, and the flange of the inner box is pushed over the raised piece, and is engaged and held between the raised piece and the engaging flange. A method for producing a refrigerated/refrigerated freezer showcase, characterized in that: a back plate is then attached to the rear opening of the outer box to close it.