JPH0339139Y2 - - Google Patents

Description

[Detailed description of the invention] "Field of industrial application" The present invention relates to a heat-retaining container such as a cooler box.

"Prior Art" FIG. 10 shows an example of a conventional heat-insulating container. The container body 1 has a double structure consisting of an outer case 2 and an inner case 3, and the outer case 2 and inner case 3 have an upper end R.
Ultrasonic welding. A space formed between the outer case 2 and the inner case 3 is filled with a hard foam heat insulating material 4.

"Problems to be Solved by the Invention" To describe the method for manufacturing the heat-insulating container, first, the inner case 3 is attached to the outer case 2 by ultrasonic welding. Next, the undiluted solution of the hard foam insulation material 4 is filled through the insulation material filling hole 5 provided at a predetermined location on the bottom of the outer case 2, and after foaming, the hard foam insulation material overflowing from the insulation material filling hole 5 is cut. Then, fit the lid 6.

A heat insulating container is obtained by the above manufacturing method, but in the above method, abnormal foaming occurs during molding of the hard foam insulation material 4, and as shown in FIG.
A problem has often occurred in which the inner case 3 bulges and spoils its appearance. This is especially noticeable when using thin plate wall materials. Furthermore, in order to prevent the above-mentioned blistering, detailed control of foaming conditions and complicated equipment are indispensable, and if this is adopted, it may be possible to suppress the appearance defects, but
A large amount of money is required for management and equipment, making it difficult to reduce costs.

The present invention was developed in view of the above circumstances, and aims to provide a heat-retaining container that is less prone to molding errors in the heat insulating material placed inside the wall of the container during the manufacturing process and has excellent heat insulation properties. .

``Means for Solving the Problems'' In the heat-insulating container according to the present invention, a foam insulation material is superimposed and fixed between the outer case and the inner case of the container main body, which has a double structure consisting of an inner and outer case. A molded heat insulator made of a plate-shaped powder vacuum insulation material is arranged with the plate-shaped powder vacuum insulation material in contact with either the outer case or the inner case. .

Embodiment FIGS. 1 to 7 show an example in which the present invention is applied to a cooler box.

Reference numeral 10 in FIGS. 1 and 2 is a container body, and this container body 10 has a double structure consisting of an outer case 11 and an inner case 12, each made of synthetic resin. In the space formed between the outer case 11 and the inner case 12,
Insulators 13A and 13B with two-part structure shown in Fig. 5
is stored. The insulation will be described in detail later.

Reference numeral 15 denotes a lid, which has a hard urethane foam 16 inside, and is rotatably attached to the container body 10 by a hinge 17. Further, the lid 15 is configured to be fixed in the closed position by a stopper 18. In addition, outer case 11
A handle 19 is attached to a predetermined upper part of the device to facilitate carrying.

A tube member 20 is fitted to the bottom of the container body 10 so as to penetrate through the outer case 11 and the inner case 12, located at the joint between the heat insulating materials 13A and 13B (see FIG. 7). The tube member 20 is attached so as to sandwich the inner case 12 and the outer case 11 between a collar 20a formed at the upper end and a collar 20b formed at the lower end. Pipe member 20
The hole in the center is a drain hole 21. This drain hole 21 is used, for example, to drain water generated when ice is melted when it is stored in a container, or to drain water during cleaning, and is normally closed with a stopper 22. It is. In addition, the pipe member 20
A packing 23 is interposed between the upper brim 20a and the inner case 11, and the pipe member 20 and the case 11 are
Watertightness is maintained between the

The heat insulators 13A and 13B are formed symmetrically (see FIG. 3). Insulators 13A, 13B
consists of a main side wall 30, sub side walls 31, 31 extending from both ends of the main side wall 30 perpendicularly to the main side wall 30 and in the same direction, and a bottom plate 3.
It consists of 2. The main side wall 30 is the sub side wall 31
It is made thinner. The sub-side wall 31, the bottom plate 32, and the inner portion 30a of the main side wall 30 are made of a hard foam heat insulating material by integral molding. A recess 33 is formed on the outside of the foamed heat insulating material constituting the main side wall 30 (see FIGS. 4 and 5), and a powder vacuum heat insulating material 34 is fixed therein. When the powder vacuum heat insulating material 34 is set in the container body 10, it is set so as to come into contact with the inner surface of the outer case 11.

The above-mentioned heat insulating materials 13A and 13B are made by so-called insert molding, in which a powder vacuum insulating material 34 is placed in advance at a predetermined location in a mold, and a stock solution of hard foam insulating material is injected into the mold. . At this time, the powder vacuum heat insulating material 34 is naturally fixed to the hard foam heat insulating material by the adhesive action of the hard foam heat insulating material.

The powder vacuum insulation material 34 here is, as shown in FIG.
5 is filled in a bag 36 made of a laminate film, the inside of the bag is depressurized to about 0.1 to 1 Torr, and the opening 37 of the bag 36 is sealed by heat sealing or the like. be. The above-mentioned laminate film is, for example, a film in which an inner layer film made of heat-sealable polyethylene, polypropylene, etc. and an outer layer film with excellent gas barrier properties such as polyester, polyamide, polyvinyl alcohol, polyvinylidene chloride, etc. are laminated together, or an outer layer film is used. As a material, a metal vapor-deposited film or a metal foil is used.
This powder vacuum heat insulating material 34 has extremely excellent heat insulating performance, with a thermal conductivity less than half that of synthetic resin foam. When this powder vacuum insulation material 34 is fixed to the hard foam insulation material of the main side wall 30, the peripheral welded portion 38 is bent toward the secondary side wall 31 side and fixed (see FIGS. 3 and 5). .

When making a cooler box with the above structure, first, heat insulators 13A, 1 are pre-formed on the outer case 11.
3B, insert the inner case 12 inside them, and fit the outer case 11 and the inner case 12 with the upper fitting part 40. Next, the drain hole 21
The pipe member 20 having the above-mentioned structure is press-fitted from the inner case 12 side, and after the lower end collar 20b is fitted to the outer case 11, they are joined watertightly by ultrasonic welding.

If the above manufacturing method is used, the heat insulators 13A, 13
Unlike the conventional method in which B is foamed within the double-structured container body 10, this method is such that the heat insulator is foam-molded outside in advance and then stored within the container body.
There is no fear that the outer case 11 or the inner case 12 will be deformed during foaming. Furthermore, since the heat insulator has a two-part structure, the molding stroke during foaming can be shortened, thereby reducing mold costs and facilitating molding.

In addition, as described above, the heat insulators 13A and 13B are
Since it has a split structure, it can be used when making a large heat insulating container, or when making a pipe member 2 for forming a drain hole 21.
There are also advantages such as ease of setting 0.

Further, in the above embodiment, the peripheral film welded portion 38 of the powder vacuum insulation material is bent toward the sub-side wall 31 side, and as a result, the inorganic material powder 3
The part with excellent insulation properties that accommodates the
It is now possible to extend and dispose it up to the vicinity of the edge. In other words, as shown in FIG.
It is made as wide as possible to provide excellent insulation.

If the peripheral film welded portion 38 of the powder vacuum insulation material 34 is arranged straight without being bent toward the secondary side wall 31 side, a space must be secured to arrange the film welded portion 38 on the peripheral edge of the main side wall 30. Therefore, the width L of the portion with excellent heat insulation properties that accommodates the inorganic material powder 35 becomes narrower, and as a result, the heat insulation properties become lower than those of the above embodiments.

Further, in the above embodiment, when molding the heat insulating body, foam molding can be performed with the powder vacuum heat insulating material 34 placed horizontally (horizontally), and displacement of the powder vacuum heat insulating material 34 can be prevented. You can also get this advantage.

In the above embodiment, the powder vacuum heat insulating material 34 is arranged on the outside of the main side wall 30, but the present invention is not limited to this, and as shown in FIGS. It may be arranged inside the hard foam heat insulating material 30a so as to abut against the inner case 12.

In addition, in the above embodiment, an example in which the present invention is applied to a cooler box is explained. However, when the present invention is applied to a water jug, for example, the heat insulating body is divided into two parts as in the above embodiment, and the joint is A structure in which an injection port is provided is advantageous in terms of assembly work.

Further, in the above embodiment, only the internal structure of the opposing side walls is made of a heat insulator made of hard foam heat insulating material and powder vacuum heat insulating material, but all of the side walls or in addition, the bottom part is also made of It may also be constructed from the above heat insulator. Furthermore, in the above embodiment,
Although a structure in which the heat insulating body is divided into two parts is shown, the structure is not limited to this, and it goes without saying that an integral structure may be used.

"Effects of the Invention" As explained above, according to the present invention, the heat insulating body of the heat-retaining container is a molded insulating body composed of a foamed insulating material and a powder vacuum insulating material superimposed on and fixed to the foamed insulating material in advance. Powder vacuum insulation has better insulation properties than foam insulation, so it has better insulation properties than conventional foam insulation. Furthermore, if the insulation properties are kept at the same level, the side walls or bottom can be made thinner, and the container capacity can be increased accordingly.

In addition, when placing an insulator made of foam insulation material and powder vacuum insulation material between the outer case and the inner case of a double-layered container body, the powder vacuum insulation material is glued to the outer case or inner case of the container body. In order to place the outer case and the inner case by just abutting each other, it is necessary to perform foam molding on the outside without foaming between the outer case and the inner case. There is no risk of mistakes occurring when the inner case or outer case swells, and the occurrence of processing errors can be suppressed.

[Brief explanation of the drawing]

1 to 7 show embodiments of the present invention,
Figure 1 is a side view showing the whole, with a part cut away, Figure 2
3 is a perspective view of the heat insulator, FIG. 4 is a sectional view of the heat insulator seen from the side, and FIG. 5 is a sectional view taken along the stopper in FIG. Figure 6a
6 is a partially cross-sectional plan view of the powder vacuum insulation material.
Figure b is a partially sectional side view, Figure 7 is a detailed cross-sectional view of the vicinity of the drain hole, Figures 8 and 9 are views showing modified examples of the heat insulator, and Figure 10 is a diagram of a conventional heat insulating container. FIG. 11 is a partially sectional side view showing an example, and FIG. 11 is an enlarged sectional view of the main part. 10... Container body, 11... Outer case, 12...
...Inner case, 13A, 13B...Insulator, 34...
…Powder vacuum insulation.

Claims (1)

[Scope of utility model registration request] Between the outer case and the inner case of a double-structured container body consisting of an inner and outer case, a molded heat insulating body consisting of a foamed heat insulating material and a plate-shaped powder vacuum insulating material superimposed on and fixed to the foamed heat insulating material is placed. A heat-retaining container characterized in that the plate-shaped powder vacuum insulation material is placed in contact with either the outer case or the inner case.