JPH0511152Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is mainly used for containers for soups, stews, curries, juices, milk, and other food and drink products, especially for inner containers in which food and drinks are stored, and for containers with heat-insulating properties. The present invention relates to a food and drink container comprising an outer container made of synthetic resin foam.

[Prior Art] Containers for this type of food and drink products made of single-layer or multi-layer sheets of non-foamed synthetic resin have good moldability and shelf life for food and drink products, but have poor insulation properties and are If you heat the contents in a microwave, etc., the container will also become hot and difficult to hold. On the other hand, containers made of synthetic resin foam with good heat insulation properties have problems with heat resistance and food/drink storage stability, and cannot be used particularly for food/drinks (retort foods) that are sterilized at high temperatures, such as soups and stews.

For this reason, there have conventionally been containers that are a combination of a container made of the above-mentioned synthetic resin sheet and a container made of a synthetic resin foam which protects the outside and has good heat insulation properties.

As for the above-mentioned combination structure, it is suitable for manufacturing and combination that the inner container made of a synthetic resin sheet filled with contents is simply inserted and fitted into the outer container made of synthetic resin foam. Further, it is more preferable to provide a gap between the body of the inner container and the body of the outer container from the viewpoint of heat insulation.

[Problems to be solved by the invention] However, if the inner container is simply inserted and fitted into the outer container as described above, it is difficult to lower the opening when taking out the contents after heating or when eating or drinking. If the container is tilted so as to face the container, the inner container is likely to fall out of the outer container, and there is also a risk that the inner container may be accidentally removed when handling the container. In particular, when there is a gap between the body of the inner and outer containers, the container is particularly easy to pull out.

As a means to prevent this, forming a step or recess on the inner surface of the body of the outer container made of synthetic resin foam by means of an undercut that engages with the outer periphery of the flange-shaped edge provided at the open end of the inner container is as follows: This makes it difficult to remove the mold during molding, which is not preferred in practice.

In view of the above, the present invention is a container in which an inner container made of a non-foamed synthetic resin sheet or the like and an outer container made of synthetic resin foam are fitted and combined, and the container is inverted so that the opening faces downward. It is an object of the present invention to provide a container for food and beverages in which there is no fear that the inner container will easily come off even when the container is tilted, and the container can be easily and safely taken out, eaten, or handled.

[Means for Solving the Problems] The present invention employs the following configuration in order to solve the above problems.

That is, the food and drink container of the present invention is a container in which an inner container made of a non-foamed synthetic resin sheet or the like and an outer container made of a synthetic resin foam are fitted together.
The inner surface of the body of the outer container is provided with a flange-like edge provided at the open end of the inner container that protrudes inwardly so as to abut at least near the fitting height position of the flange-like edge and enables upward die-cutting. A convex portion is provided to
It is characterized in that the flange-shaped edge of the inner container is elastically press-fitted into the convex portion.

[Function] According to the above-mentioned container of the present invention, when the inner container and the outer container are combined, the inner container is fitted into the outer container, and the flange-like edge of the inner container is formed on the inner surface of the body of the outer container. When the inner container is pressed further while in contact with the protrusion, the flange-like edge of the inner container is made of a non-foamed synthetic resin sheet and has a flange-like shape, so the flange-like edge is pressed against the protrusion of the outer container. ,
It is pushed in elastically against the elastic force of the synthetic resin foam that is its material, deforming it under pressure, and becomes as if it were wedged in.

Therefore, in this fitted state, the flange-shaped edge is strongly pressed so as to sink into the convex portion, and the pressing force is further increased due to the elastic force of the press-deformed portion of the convex portion. Therefore, even though the inner container is simply fitted into the outer container, even if it is turned over or tilted so that the opening side faces down, the inner container will not come out of the outer container and will remain securely inside the outer container. is maintained.

[Example] Next, embodiments of the present invention will be described based on the drawings.

In the figure, reference numeral 10 denotes an inner container molded from a non-foamed synthetic resin sheet, etc., and has an outward flange edge 13 at an open end 12 of a body portion 11 which has a slightly upwardly expanding tapered shape. There is. This inner container 10
The interior of the lid sheet 15 is filled with food and beverages as contents, and the lid sheet 15 is placed against the flange-shaped edge 13.
is adhered and sealed by heat-sealing means or the like. 16 is a knob piece for opening. The body portion 11
A reinforcing rib is provided as necessary.

Reference numeral 20 denotes an outer container made of synthetic resin foam, the body 21 of which is formed into an upwardly expanding tapered shape so that the inner container 10 can be fitted from above in accordance with the contents 10; In particular, in the illustrated embodiment, the open end 12 of the inner container 10 is connected to the outer container 20.
It is formed so that it can be fitted in a slightly recessed state from the open end 22 of.

And on the inner surface of the body 21 of the outer container 20,
At least near the fitting height position of the flange-like edge 13 of the inner container 10, a convex portion 23 is integrally formed so as to protrude inward so that the flange-like edge 13 comes into contact with the inner container 10 and to enable upward die-cutting. The flange-like edge 13 of the inner container 10 is elastically pushed into the convex portion 23.

As a convex portion 23 that enables upward die cutting,
In the embodiment shown in FIGS. 1 to 4, a wedge whose inner surface is slightly inclined downward from a position slightly above the fitting position of the flange-like edge 13 at required circumferential intervals so that it can be removed from the mold is formed. A convex portion 23 having a shape is formed. Although the height of the convex portion 23 varies depending on the size of the container, it is preferably about 1 to 2 mm.

When the convex portion 23 is formed on the inner surface of the body 21 of the outer container 20 as described above, after the inner container 10 is filled with the food or drink to be packaged and sealed with the lid sheet 15, the inner container is 10 into the outer container 20 from above and fit together (Fig. 3), and the inner container 10
By further pushing the flange-like edge 13 into contact with the convex part 23, the flange-like edge 13 moves against the upper part of the convex part 23 against the elastic force of the synthetic resin foam that is its constituent material. It is pushed in elastically so as to be deformed by pressure, and becomes in a state of being wedged in (Fig. 4).

Therefore, when both the inner and outer containers 10, 20 are in the fitted state, the flange-like edge 13 is held in the fitted state with strong pressure so as to fit into the convex portion 23, and therefore the opening side is directed downward. Even if the inner container 10 is turned over or tilted, the inner container 10 is reliably held within the outer container 20 without coming off from the outer container 20, so that the inner container can be easily and safely taken out and eaten or eaten.

Note that if the flange edge 13 of the inner container 10 is oriented slightly upward and pressed against the protrusion 23 in the above-mentioned fitted state, when the inner container 10 tries to come out, the flange-shaped edge 13 will protrude. The tensioning effect is achieved, and the inner container 10 can be more effectively prevented from slipping out.

When the convex portions 23 are formed at required intervals in the circumferential direction, the convex portions 23 may have a rectangular cross section as in the above embodiment and have a length up to the middle of the body portion 21 in the height direction. As shown in the figure, other cross-sectional shapes such as a semicircular cross-section or a length that reaches the bottom can be set as appropriate depending on the fitting strength. It is also possible to increase the size and form it continuously in the circumferential direction as shown in FIG. In either case, the flange-like edge 13 of the inner container 10 is formed to be press-fitted with elastic deformation in the same manner as described above, so that the inner container 10 can be prevented from coming off in the same manner as described above.

When the convex portion 23 is formed into a convex strip as shown in FIG.
becomes easily deformed by pressure.

It should be noted that if the outer peripheral edge of the flange edge 13 of the inner container 10 is formed into an uneven shape 17 as shown in FIG. The tip of the convex portion 17a on the outer circumferential edge easily bites into the convex portion 23, and the inner container 10 can be prevented from slipping out more effectively. Particularly in this case, the convex portion 23 as shown in FIG.
Even when it is continuous in the circumferential direction, it is easier to push in and the effect of preventing it from coming out is greater.

As the constituent material of the inner container 10 described above, a non-foamed synthetic resin sheet is preferably used because the container can be easily formed from the sheet by press molding or the like. In particular, since the contents are food and beverages, the three-layer structure consists of a polyvinyl alcohol resin with good gas barrier properties as an intermediate layer, a polyethylene resin layer with good oil resistance on one side, and a polypropylene resin layer on the other side. Composite sheets with a multilayer structure such as the above are preferably used. Of course, it can also be formed using other materials, such as a sheet of paper laminated with a synthetic resin film. Also, for the lid sheet 15, various materials can be used like the inner container 10, such as a single layer or multilayer sheet of synthetic resin.

In addition, the synthetic resin foam that is the constituent material of the outer container 20 includes styrene resin foams such as polystyrene and copolymers mainly composed of styrene, as well as olefin resin foams, polyvinyl chloride resin foams, and others. Synthetic resin foam can be used.

[Effects of the invention] According to the above-mentioned food and drink container of the present invention, although the inner container made of a synthetic resin sheet or the like is simply fitted to the outer container made of synthetic resin foam,
Even if the container is tilted or reversed so that the opening faces downward, the flange-like edge of the open end of the inner container is elastically press-fitted against the convex part on the inner surface of the body of the outer container. Since the container is in a strongly pressed state, there is no risk of it being easily and inadvertently pulled out, and the contents can be taken out or eaten easily and safely.

Moreover, since it is only necessary to push and fit the inner container into the outer container as described above, high-temperature sterilization filling of the food or drink to be packaged and the operation of assembling both containers are easy, and manufacturing costs do not increase.

Further, since the convex portion on the inner surface of the outer container is removable, the outer container having the convex portion can be easily molded by molding, and there is no problem in manufacturing.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view showing an embodiment of the present invention;
The figure is a perspective view with the inner and outer containers separated, FIGS. 3 and 4 are enlarged cross-sectional views of a portion of the inner container before and after the inner container is press-fitted into the outer container, and FIG. 5 is a diagram showing another embodiment of the outer container. A partially cutaway perspective view, FIG. 6 is a partial perspective view showing another embodiment of the inner container, and FIG. 7 is a partially enlarged view showing another embodiment in which the inner container shown in the previous figure is press-fitted into the outer container. It is a cross-sectional perspective view. Explanation of symbols, 10...Inner container, 11...Body part,
12...Open end, 13...Flanged edge, 15...
... Lid sheet, 17 ... uneven shape, 20 ... outer container, 21 ... body, 22 ... open end, 23 ... convex portion.

Claims (1)

[Scope of utility model registration request] an inner container made of a non-foamed synthetic resin sheet, etc.;
The container is fitted with an outer container made of synthetic resin foam, and the inner surface of the body of the outer container has a flange-like edge at least near the fitting height of the flange-like edge at the open end of the inner container. The inner container has a convex portion that protrudes inwardly so as to come into contact with the mold and enables upward die-cutting, and the flange-shaped edge of the inner container is elastically pushed into the convex portion. Characteristic containers for food and drink.