JPH043989Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a simple disposable food container made of synthetic resin that is used to take processed foods such as boxed lunches, frozen sweets, and side dishes home from retail stores. Regarding.

[Conventional technology]

In recent years, due to changes in eating habits, it has become more common for people to not only carry boxed lunches, but also to bring home frozen sweets that use a lot of cream and hot side dishes prepared by cooking companies.

Paper or plastic containers are usually used for transportation, and the quality and taste of the processed food may change depending on the temperature of the environment in which it is transported, so it is necessary to maintain the temperature at the time of purchase. be done. In order to meet these demands, dry ice is sometimes placed in thick Styrofoam containers with frozen confections, but using Styrofoam containers is expensive and cannot be applied to relatively low-priced products. Moreover, the current situation is that the containers are bulky, making them inconvenient to carry.

In addition, as a container that can carry food in a heated state, there is a container that houses a heating element in the bottom, as described in Japanese Utility Model Application Publication No. 57-156470, but in this case, the food inside the medium container is Since the heating is only by heat transfer from the heating element, there was a drawback that the heat was difficult to be sufficiently transferred to the entire food inside the inner container. Furthermore, JP-A-58-134882 discloses a container equipped with a sealed pocket containing a reactant (calcium oxide or calcium hydroxide and water) as a container for heating food. Containers are used to heat food at room temperature or frozen food before eating, and the structure of the pocket and the structure that controls the start and stop of reactions of reactants are complex, as well as the entire container containing reactants. The container was large and heavy, making it unsuitable for use as a container for keeping warm side dishes purchased at a store and taking them home.

[The problem that the idea aims to solve]

The objective of this invention is to create an inexpensive, suitable for relatively short-term transportation that can efficiently utilize the heating or cooling capacity of a heat source or cooling source, maintain the temperature of processed foods, etc. stored in a container. The purpose is to provide a structure for food containers.

[Means to solve the problem]

The disposable food container of the present invention is a simple food container consisting of a double wall in which the outer wall is made of a thin synthetic resin plate or a foamed resin plate, and the inner wall is made of a thin synthetic resin plate. A bottom housing space for a heat source or a cooling source is formed on the outer wall, and a lead-out path for discharging the heating medium or cooling medium from the housing space from the housing space to the side surface in a vertical direction and the heating medium or cooling medium to the outside of the container. It is characterized by having a convex surface.

[Effect]

The inner wall is basically a flat surface except for the partition protrusion, so it does not interfere with the storage of contents.
In addition, the bottom storage space for the heat source or cooling source formed on the outer wall surface and the lead-out path for discharging the heating medium or cooling medium to the outside of the container serve as reinforcement for the entire container, and furthermore, the medium storage space and the lead-out path Since the container does not open into the container, the stored food will not be deteriorated by the medium.

〔Example〕

Hereinafter, the features of the present invention will be specifically explained using examples with reference to the drawings.

FIG. 1 is a perspective view showing a food container according to an embodiment of the present invention.

In the figure, reference numeral 1 indicates the container of this embodiment, which is made of a relatively hard synthetic resin such as reinforced polystyrene, and includes an outer container 2 for maintaining the shape of the container itself, and an outer container 2 for maintaining the shape of the container itself. It consists of an inner container 3 made of a relatively soft synthetic resin such as polystyrene, polypropylene, or polyethylene, which is mounted inside the container 2 and whose upper edge is locked to the upper edge of the outer container 2. Furthermore, as shown in the figure, it is of course possible to provide a protrusion 8 toward the inside of the inner container 3 and use it as a partition wall for the stored food.

2 is a perspective view showing the structure of the outer container portion of the container shown in FIG. 1 from which the inner container portion has been removed, and FIG. 3 is a sectional view taken along the - line in FIG. 1.

In FIGS. 2 and 3, 4 is a space provided at the bottom of the container 1 between the outer container 2 and the inner container 3, which can be used as a non-combustible heat source or a dry A cooling source such as ice cream is housed in the same space 4.

From the space 4, a lead-out path 5 is provided along the side wall from the bottom to lead out, for example, carbon dioxide gas generated from dry ice and release it to the outside of the container. This lead-out path 5 may be formed by providing a concave line from the bottom of the outer container 2 along the side wall as shown in the figure, and this may be used as the lead-out path 5.Alternatively, although not shown, it may be provided on the inner container 3 side. Good too. The size and number of the lead-out channels 5 can be appropriately selected depending on the type and amount of food to be stored, the capacity of the container itself, and the amount of heat source or cooling source stored in the space 4, but strictly speaking, It is not necessary to have a structure independent from the wall surface of the inner container 3, and a structure in which the separation interval between the inner and outer walls is larger than other parts can sufficiently exhibit its effect. Further, when the outlet path 5 is formed to protrude inside the inner container 3, this protrusion can be used as a partition wall for the stored food or as a locking part of the partition wall.

Due to the existence of this outlet passage 5, the hot or cold air from the space 4 containing the heat source or cooling source rises from the bottom along the side wall and reaches the inner container 3, as shown by the arrow in FIG. It is discharged to the outside of the container from the gap between the upper edge and the outer container 2, and even with a small amount of heat or cooling source, it is possible to efficiently heat or cool the entire container, that is, the entire stored food. Further, if necessary, it is also possible to provide holes for gas escape in the upper part of the outer container 2.

This structure of the container 1 is convenient for keeping stored foods warm when carrying warm processed foods, especially in winter. In this case, the heat source is similar to dry ice in the case of cooling, by housing a non-combustible solid heat source in the space 4, the generated hot air rises through the outlet path 5 by natural convection, and is stored. It has the effect of evenly heating the entire food.

A container 1 having the above structure is used with an appropriate lid attached. In addition, in order to further enhance the cooling or heating effect, it is also possible to use the container 1 itself wrapped in a heat insulating container such as one made of foamed polyurethane.

FIG. 4 is a longitudinal sectional view showing another embodiment of the present invention.

In this embodiment, the outer container is formed by heat-sealing the edges of a bottom plate 7 made of polyethylene or polystyrene, which has a concave portion for forming the space 4, on the bottom of a side plate 6 made of thin wood, cardboard, or expanded polystyrene. . In this way, by forming the outer container with the side plates 6 and the bottom plate 7, the capacity is large compared to the external shape having vertical side walls, and the heat source or cooling source accommodated in the space 4 can be used effectively. You can get a container.

[Effect of idea]

Since the food container of the present invention has the above structure, it has the following effects.

A heat source or a cooling source can be accommodated with a simple structure of providing a space at the bottom of a double-walled container, and an inexpensive heat-retaining container that is convenient to carry can be obtained.

Since a gas outlet path communicating with the outside air is provided from the space, the gas generated from the heat source or cooling source will not affect the stored items such as food.

Due to the natural convection of hot air or cold air passing through the gas outlet path, the heating power of the heat source or the cooling power of the cooling source can be efficiently utilized.

[Brief explanation of the drawing]

1 is a perspective view showing a food container according to an embodiment of the present invention; FIG. 2 is a perspective view showing the structure of the outer container portion of the food container shown in FIG. 1 with the inner container portion removed;
FIG. 3 is a sectional view taken along the - line in FIG. 1, and FIG. 4 is a longitudinal sectional view of another embodiment of the present invention. 1...Container, 2...Outer container, 3...Inner container, 4
... Space, 5 ... Lead-out path, 6 ... Side plate, 7 ... Bottom plate, 8 ... Projection.

Claims (1)

[Scope of Claim for Utility Model Registration] A simple food container consisting of a double wall in which the outer wall is made of a thin synthetic resin plate or a foamed resin plate, and the inner wall is made of a thin synthetic resin plate, wherein the inner surface and bottom surface of the inner wall are basically It is formed into a flat surface, and the outer wall is provided with a bottom storage space for a heat source or a cooling source and a lead-out path for discharging the heating medium or cooling medium from the storage space from the bottom surface in a lateral direction and the side surface in a vertical direction. A simple disposable food container formed by a convex surface.