JPH0339379Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a double container in which an outer container and an inner container are integrated.

(Prior Art) Various types of double containers composed of an outer container and an inner container have been proposed in the past, as shown in Japanese Utility Model Application Publication No. 62-65912, for example. ing. Generally, this kind of double container is
The outer container is made of a material with excellent heat insulation properties, and in order to prevent vapor and liquid from leaking from the inner container, the inner container is made of a material with excellent gas barrier properties. It has been used in large quantities in recent years because it has excellent heat retention and cold retention properties and can be made from inexpensive materials such as plastic.

However, even though these double-walled containers have excellent heat and cold insulation properties and can be formed at low cost, there are cases where a single-walled container made of transparent material
The contents cannot be visually confirmed from the outside. This type of double-layered container requires the outer container to be made of thick material or foamed resin material in order to enhance its heat and cold retention effects, and the outer container made of such material is transparent. This is because the outer container makes it difficult to visually check the inside of the container. It is necessary to visually check the inside of the container, of course, to confirm the type of contents.
There are various cases such as checking the cooking status of instant foods, checking the thawing status of frozen foods, etc.

Regarding this point, for example,
As indicated in Publication No. 53474, ``The outer layer consists of a paper container with a window hole in the trunk wall and a small hole in the bottom wall, or a paper tube with a window hole in the trunk wall, and the inner layer has a window hole in the outer layer. It is a transparent single-layer or multi-layer plastic container provided with a corresponding protrusion, and if the protrusion is fitted into the window hole, the above-mentioned visual recognition from the outside is possible. However, it is practically difficult to provide a protrusion in a portion corresponding to the window hole in the inner layer and to independently form a window hole in the outer layer into which the protrusion fits. This is because, if an attempt is made to mechanically manufacture an independent protrusion or window hole on the side wall of the cylinder, the entire apparatus inevitably becomes complicated.

The inventors of the present invention have conducted extensive research to propose a double-sided container that can be easily manufactured while retaining the advantages of this type of double-sided container. The present invention was completed based on the new finding that forming a downwardly-opening opening in the container is suitable for this improvement.

(Problems to be Solved by the Invention) The present invention has been made in view of the above-mentioned circumstances, and the problem to be solved by the invention is the manufacturing difficulty of conventional double containers.

The purpose of this invention is to retain the advantages of the double container, and to
To provide a double container with a simple structure, in which the contents and their condition can be easily checked, and the container can be manufactured and stacked easily.

(Means for Solving the Problems) In order to solve the above problems, the means taken by the present invention are explained with reference to FIGS. 1 to 5 corresponding to the embodiments. Outer container 10 made of material
and an inner container 20 made of a non-foaming transparent material and housed and fixed inside the outer container 10. By forming a plurality of openings 11 in the side wall portion of the outer container 10, the transparent material A part of the inner container 20 formed by the method is exposed so that the contents stored in the inner container 20 can be viewed from the outside, and the openings 11 of the outer container 10 are arranged at equal intervals from each other, The double container 100 is characterized in that the outer container 10 gradually increases in size downwardly and opens at the end portion 13 of the outer container 10.

That is, the double container 100 according to the present invention integrates the outer container 10 having the opening 11 and the inner container 20 made of a transparent material.
A part of the inner container 20 is exposed from the opening 11 of the outer container 10 so that the inside can be viewed from the exposed portion of the inner container 20, and the openings 11 are arranged at equal intervals and are arranged downward. By gradually increasing the size and opening at the end portion 13 of the outer container 10, manufacturing is facilitated.

(Aspects of operation and use of the device) Double container 1 according to the present invention configured as described above
00, the outer container 10 made of foamed resin has sufficient heat and cold insulation effects, and the inner container 20, which has excellent gas barrier properties, prevents vapor and liquid from being absorbed. It is designed not to leak.

In addition, in this double container 100, a part of the inner container 20 is exposed from the opening 11 formed in the outer container 10 constituting the double container 100, and the inner container 20 is made of a transparent material. Because of this, the contents inside the inner container 20 emerge from the opening 11 of the outer container 10. Therefore, the type or condition of the contents inside this double container 100 can be easily visually recognized.

In particular, in this double container 100, the outer container 10 and the inner container 20 may be formed as bottomed cylinders, and each opening 11 of the outer container 10 gradually increases in size downward. Butt end part 13
Since the opening is made at the opening, manufacturing of all the constituent members and constituent parts is extremely easy. Therefore, this double container 100
Overall, it is extremely easy to manufacture.

Furthermore, in the case of this double container 100, since the middle container 20 is located inside the outer container 10, the exposed portion of the middle container 20 is moved back one step by the opening 11 of the outer container 10. Therefore, when the double containers 100 are stacked in multiple stages or when the stacks are separated, the opening 11 of the outer container 10 becomes an escape route for air. Therefore, when stacking or separating a large number of double containers 100, the stacking and separating operations are easy because the spaces between the double containers 100 are not airtight or airtight. It becomes.

In addition, in the stacked state of each double container 100, at least the opening 11 portion of the outer container 10 does not come into close contact with other double containers 100. In addition, when the opening 11 of the outer container 10 is opened downward at the end portion 13 of the outer container 10, air flow when stacking or separating a large number of double containers 100 However, this will be done even more smoothly.

(Example) Next, the present invention will be described in detail based on an example shown in the drawings.

FIG. 1 shows a perspective view of a double container 100 according to the present invention, and the double container 100 mainly consists of an outer container 10 and an inner container 20.

In this embodiment, the outer container 10 is made of foamed resin, more specifically foamed polystyrene, and has excellent heat insulation properties, but is opaque. As shown in FIGS. 2 to 4, a plurality of openings 11 (four in this embodiment) are formed in the side wall portion of the outer container 10 at equal intervals. The upper end of each opening 11 is connected to the first
As shown in the figure, the side wall of the outer container 10 is interrupted in the middle;
is open at the lower end of each opening 11
are separate and independent. And each of these openings 1
Particularly, as shown in FIG. 2, the threads 1 are formed so as to gradually become larger toward the bottom, and are opened at the end portion 13 of the outer container 10. Therefore, in this outer container 10, a part of the bottom 12 corresponding to the opening 11 is exposed as shown in FIG.
Further, the lower end portion of the outer container 10 located between the respective openings 11 serves as a thread end portion 13.

The overall shape of the outer container 10 is such that the opening gradually becomes larger toward the top, and a flange portion 15 is formed at the upper end thereof. This outer container 1
In the upper end portion of 0, each opening 11 does not exist, and the outer peripheral portion is formed with a flange portion 15, so that the strength of the opening is sufficiently ensured. Furthermore, as shown in FIG. 5, the outer container 10 in this embodiment has a stepped portion 14 formed at its lower end. This step 14
This prevents each double container 100 from being completely stuck together when a large number of double containers 100 are stacked.

The inner container 20, which is housed and fixed within the outer container 10 as described above, is made of a non-foaming transparent resin material, in this embodiment, polystyrene resin, vinyl chloride resin, or the like. In other words, the inner container 20 is not only transparent, but also has so-called gas barrier properties (property that does not allow steam or water to pass through). Note that it is preferable to use the same material for the inner container 20 as the material for the outer container 10, since this makes it easier to join them together when the two are integrated. Of course, this inner container 20 is for storing the contents without leaking, so
There are no openings or holes except for the upper part.

Furthermore, as will be described later, since the inner container 20 has an outer container 10 formed around the inner container 20 using a foamed resin material, its shape naturally depends on the inner surface shape of the outer container 10. and are the same, and the two are integrated in close contact. Note that, before the inner container 20 is integrated with the outer container 10, various markings may be formed on the portion corresponding to the opening 11 of the outer container 10 using printing or the like. When the inner container 20 is configured in this way, the display can be clearly seen through the opening 11 of the outer container 10, and since the inner container 20 has a smooth surface, It is easy to print.

Next, the double container 100 mainly composed of the outer container 10 and the inner container 20 is formed as follows. First, the inner container 20 is separately formed from a predetermined material. The inner container 20 can be easily formed by applying commonly used vacuum forming to a resin sheet.

The separately formed inner container 20 is placed over the inner mold of the foam molding machine, and the opening 11 is inserted into the inner mold.
The outer molds having protrusions corresponding to the molds are brought close to each other, and a foaming material is placed in the space formed by the inner and outer molds to foam the material. This creates a double container 10 in which the outer container 10 and the inner container 20 are integrated.
0 is completed. Note that a general foam molding method is sufficient.

(Effect of the invention) As explained above, in the present invention, as exemplified in the above embodiment, the outer container 10 formed of a foamed resin material
and an inner container 20 made of a non-foaming transparent material and housed and fixed inside the outer container 10. By forming a plurality of openings 11 in the side wall portion of the outer container 10, the transparent material A part of the inner container 20 formed by the method is exposed so that the contents stored in the inner container 20 can be viewed from the outside, and the openings 11 of the outer container 10 are arranged at equal intervals from each other, The structure is characterized by the fact that it gradually increases in size downward and opens at the tail end portion 13 of the outer container 10.
The advantage of the double container, which is its excellent cold retention effect, can still be maintained, and
Internal items and their condition can be easily seen from the outside,
Furthermore, a double container that can be easily manufactured and stacked can be provided with a simple structure.

That is, in this double container 100, a part of the inner container 20 is exposed through the opening 11 formed in the outer container 10, and the inner container 20 is made of a transparent material. The contents inside the inner container 20 can be easily viewed from the outside through the opening 11 of the outer container 10.

In addition, this double container 100 has the inner container 20 located inside the outer container 10, so that
The exposed portion of the inner container 20 is the opening 11 of the outer container 10.
Since the double containers 100 are in a retracted state by one step, when a large number of these double containers 100 are stacked or separated, the space between each double container 100 will not be airtight, or the air will not be sealed. , the stacking and separation work becomes easy.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the double container according to the present invention, Figure 2 is a perspective view of the double container according to the present invention;
The figure is a front view of the same, Figure 3 is a plan view of the outer container, Figure 4 is a sectional view of the double container taken along the - line in Figure 3, and Figure 5 is the same as in Figure 3. FIG. 2 is a cross-sectional view of the double container taken along a section corresponding to the - line. Explanation of symbols, 100...Double container, 10...Outer container, 11...Opening, 12...Bottom, 20...
Medium container.

Claims (1)

[Claims for Utility Model Registration] A double container consisting of an outer container made of a foamed resin material and an inner container made of a non-foaming transparent material and housed and fixed within the outer container, By forming a plurality of openings in the side wall portion of the container, a part of the inner container made of the transparent material is exposed so that the contents stored in the inner container can be visually recognized from the outside, and A double container characterized in that the openings of the outer container are arranged at equal intervals from each other and gradually increase in size downwardly, opening at the tail end of the outer container.