JPH0725348Y2 - Food container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a multi-stage lidded container formed of a heat insulating material, which is mainly used for a lunch box for sale and has a heat retaining means. For containers.

[Prior Art and Problems Therefor] Conventionally, containers used for lunch boxes have been variously devised to maintain the temperature of food during cooking.

For example, there is a structure in which a side wall, a bottom portion, and a lid forming a container are formed of a heat insulating material to keep the food stored in the container warm. However, in this container, the temperature inside the container is lowered at any time, and the temperature of the food becomes close to room temperature after several hours.

Also, there is a container for bento having a heat retaining device such as a jar, but this container has a complicated structure and is expensive,
Moreover, it is inconvenient because it becomes heavy and heavy for portable use.
Therefore, it is not suitable as a disposable container for the purpose of selling bento.

Further, in recent years, there is a lunch box equipped with a heating material on the bottom of the container. However, in the case of a multi-stage container, if the heating material is provided only on the bottom of one container, it is difficult to keep the food contained in another container that is not equipped with the heating material warm.

Also, when rice etc. is stored in a container, water vapor generated from the rice condenses on the side wall and lid of this container, and in the case of a multi-stage container, dew condensation occurs on the bottom part of the upper container to form water droplets. There is a problem of falling on the rice and cooling it or reducing the taste.

[Means for Solving Problems] The food container of the present invention is a container with a three-stage lid formed of a heat insulating material, and a heat generating material is provided at the bottom of the lowermost container. A ventilation hole is formed through the bottom of the second-stage container placed in the lower-stage container, and a cold insulating material is provided in the upper-most container placed in this second-stage container. A lid is arranged on the container, and the three-stage lidded container is a rectangular plane,
This is a bowl-shaped bowl for rice in the bottom container.

[Operation] With the food container of the present invention, the warm food stored in the lowermost container is kept warm by the heat from the heat generating material provided at the bottom.

Water vapor and warm air generated from the food stored in the lowermost container passes through the ventilation holes and is absorbed by the food stored in the second container, and the second food is stored. In addition, the water vapor is not absorbed by the second-stage food product to form dew on the side wall of the lowermost container and the bottom portion of the second-stage container, so that the lowermost food product is not wetted.

The food stored in the uppermost container is cooled by the cold insulating material and can be eaten while being cold.

Also, because the container is made of heat insulating material,
The heat is released from the inside of the container, and the temperature inside the container is not affected by the temperature outside, so that the heat retaining effect is maintained.

In addition, rice is stored in a bowl-shaped inner plate, making it easy to eat. Further, since the inner plate is bowl-shaped, a gap is formed between the corner plate of the lowermost container having a flat rectangular shape, that is, the inner plate and the side wall. Easy to reach.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

The present embodiment is a disposable food container (10) used for selling bento, comprising a multi-stage container body (12) and a lid (14).
It is composed of Both the container body (12) and the lid (14) are made of a foam of synthetic resin such as styrene resin (for example, polystyrene resin) having a heat insulating property. A film or a non-foamed synthetic resin film may be laminated on the surface of this foam. Furthermore, a grain of wood or the like may be printed to improve the appearance.

The main body (12) is a three-tiered stack of flat rectangular containers, and is composed of a lower container (16), a middle container (18), and an upper container (20), and the three containers (16) (18) ( The upper part of 20) is open.

Inside the upper end of each side wall (32) of the lower container (16), there is a step (3) for fitting with four rounds of the bottom (40) of the middle container (18).
4) is provided.

A sheet (24) having a wettability such as paper or cloth is laid on the entire surface of the bottom (22) of the lower container (16), and this sheet (24)
A plate-shaped heat generating material (26) is placed on top of the. Also, air holes (29) for promoting heat generation of the heat generating material (26).
Are pierced at the lower part of the side wall (32) of the lower container (16).

Above this heat generating material (26), the middle plate (3
0) is placed. The middle plate (30) is made of a material having a bowl shape and good heat conductivity, and a projecting piece (28) which can be placed on the stepped portion (34) is provided around the upper end of the dish. When the lower container (16) and the middle container (18) are combined, this protruding piece (28) is sandwiched between the lower container (16) and the middle container (18), and the lower container (16) of the middle plate (30) ) Prevent internal movement. Further, strings (31) for fixing the lower container (16), the middle container (18), and the upper container (20) in a stacked state have side walls (32) facing each other of the lower container (16).
Are provided in each. The inner plate (30) is not limited to a substantially flat octagonal shape, but may be a flat circular shape or a flat rectangular shape. Further, the shape is not limited to the bowl shape, and may be a box shape having a flat rectangular shape.

The heat generating material (26) is mainly composed of iron oxide and reacts with water and air to generate heat. The heat generating material (26) is placed on the sheet (24) immediately before storing food. And reacts more with the moisture in the sheet (24) and the air entering from the air holes (29) to generate heat. The exothermic temperature varies depending on the food to be stored, but 60 to 80 degrees is suitable, and if the temperature is lower than 40 degrees, spoilage bacteria may occur and adversely affect the food. About 5 hours is appropriate for the duration of heat generation of the heat generating material (26) of 40 degrees or more. Further, the number and size of the air holes (29) may be appropriately selected according to the required heat generation amount of the heat generating material (26). When increasing the heat generation amount,
Make the air holes (29) larger or increase the number.

The bottom portion (36) of the middle container (18) is formed of a sheet having good heat conductivity, and a plurality of ventilation holes (38) are provided at appropriate intervals. Further, the step portion (42) at the upper end of each side wall (40) of the middle container (18) is provided with a step portion (42) for fitting with the four circumferences of the bottom portion (52) of the upper container (20). There is.

A cold insulating material is arranged at the bottom of the upper container (20).
The cold insulating material (54) is, for example, a gel-like material having a large heat capacity, or a plate-like material obtained by enclosing a jelly-like substance having a cold storage effect in a synthetic resin bag, and a refrigerator before use, It may be stored in a freezer or the like to store cold, and stored in the upper container (20) when storing food. Further, a step portion (46) for fitting with the lid (14) is provided at the upper end of the side wall (44) of the upper container (20).

The lid (14) is provided with fitting portions on four sides for engaging with the step portion (46).

Next, an example of using the container (10) will be described below.

Put the cooked warm rice (A) in the lower container (16) and the roasted or steamed eel (B) in the middle container (18),
Put cold food (C) such as grated yam, soup, pickles and salad in the upper container (20). In particular, foods that need to be kept cold may be placed on the cold insulator (54).

The rice (A) stored in the lower container (16) is kept warm by the heat from the heat generating material (26) provided at the bottom. Also, the steam generated from the rice (A) is vented (38).
As it passes through the middle stage container (18), water vapor is absorbed by the side wall (3
2) and the bottom surface of the bottom part (36) of the middle container (18) will not be condensed to form water drops and the rice (A) will not get wet. Therefore, the rice (A) does not get cold or lose its taste. Further, this hot steam is absorbed by the eel (B), and warm air from the lower container (16) is transferred from the vent hole (38) and the bottom portion (36) of the middle container (18) to keep the eel warm. . In this case, since the inner plate (30) is a flat octagonal bowl,
A gap is formed between the corner portion of the lower container (16), that is, the middle plate (30) and the side wall (32), and heat is easily transferred to the middle container (18) from this gap. Moreover, since the rice (A) is put in the bowl-shaped inner plate (30), the rice (A) is easy to eat.

The cold food (C) in the upper container (20) is kept cold by the cold insulating material (54) provided in the upper container (20). Further, since the respective containers (16), (18) and (20) are formed of a heat insulating foam, the containers (16)
(18) (20) Since the heat inside does not escape to the outside and is not affected by the temperature outside, the foods (A) (B) (C) are kept at their proper temperatures.

In this container (10), the container body (12) and the lid (14) are made of synthetic resin foam, the upper container (20) is provided with a cold insulating material (54), and the lower container (16) is provided. Heating material (26)
It has a simple structure, and
Since it is easy to discard, it is suitable as a disposable container for the purpose of selling bento.

As shown in Fig. 3, the structure of the middle container (18) has side walls (4
0) The bottom part (36) of the periphery is made higher than the center part, and the ventilation hole (38) is provided at this raised position. With this structure, when food or simmered food containing sauce etc. is put in the middle container (18), the sauce or soup of simmered food gathers in the central part, and is placed in the lower container (16) from the ventilation hole (38). There is no spill.

[Advantages of the Invention] As described above, the present invention can store foods contained in the lowermost container and the second container in a warm condition.

The water vapor generated from the food stored in the lowermost container does not condense on the side wall of the lowermost container or the bottom of the second container, so the lowermost food does not get wet and this food cools or tastes. Never falls.

The food stored in the uppermost container is cooled by the cold insulating material and can be eaten while being cold.

Since the container is formed of a heat insulating material, heat escapes from the inside of the container, and the temperature inside the container is not affected by the outside temperature, so that the heat retaining effect is maintained.

Due to the simple structure of the heat retaining means, the present invention is also suitable as a disposable container for the purpose of selling bento.

In addition, since the rice is stored in a bowl-shaped inner plate, it is easy to eat. In addition, since the inner plate is bowl-shaped, there is a gap between the inner plate and the side wall, that is, the corner portion of the lowermost container of the plane rectangle.
The heat of the heat generating material is easily transferred to the second stage container through this gap.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a food container showing an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view showing the same combination, and FIG. 3 is a vertical section showing another embodiment of the middle container. It is a side view. Explanation of code 10 …… Container 12 …… Main body 14 …… Lid 16 …… Lower container 18 …… Middle container 22 …… Lower container bottom 26 …… Heating material 36 …… Middle container bottom 38 …… Ventilation hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 62-16366 (JP, A) actual opening Sho 55-179178 (JP, U) actual opening Sho 61-105018 (JP, U) actual opening Sho 60- 161072 (JP, U) Actual opening 60-15863 (JP, U) Actual opening 58-133025 (JP, U) Actual opening 60-14711 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A three-stage container with a lid formed of a heat insulating material, wherein a heat-generating material is provided at the bottom of the lowermost container, and a second-stage container placed in the lowermost container is used. A ventilation hole is provided through the bottom of the container, and a cold insulating material is provided on the uppermost container placed on this second-stage container. The attached container is a flat rectangle, and is a food container characterized in that a bowl-shaped inner plate for rice is stored in the lowermost container.