JPS583549Y2 - thermal lunch box - Google Patents

Description

[Detailed explanation of the idea] This idea relates to a thermal lunch box.

Conventionally, in this type of thermal lunch box, a space has been formed between the inner container and the main container except for the part where the inner container is in surface contact with the inner wall of the main container, but this space has been actively kept airtight. It is not designed to do so.

Therefore, there is a problem in that air convection occurs from the space toward the main body opening, and the heat of the contents of the inner container is convected from the main body opening to the outside and radiated.

This invention forms a support part on the inner wall of the main container that contacts and supports the outer periphery of the inner container, such as a rice bowl or a liquid container, in a line or band shape, and also forms a support part that supports the outer periphery of the inner container, such as a rice bowl or a liquid container. The space formed by the inner wall and the outer surface of the inner container is used as an airtight chamber.
It is an object of the present invention to provide a heat-retaining lunch box that eliminates the above-mentioned conventional disadvantages and has an excellent heat-retaining effect.

An embodiment of this invention will be described below based on the drawings.

1 is a main body, and a heat insulating material 4 such as urethane foam or styrofoam resin is disposed between an outer case 2 and a bottomed main container 3 as shown in FIGS. 1 and 2. Alternatively, as shown in FIG. 4, a double vacuum bottle 5 surrounded by a buffer-protecting material made of synthetic resin or the like is provided.

Reference numeral 7 denotes a lid body that opens and closes the opening 6 at the top of the main body 1.

Inside the main container 3, there is an inner container 8 such as a rice bowl 9 for storing rice or a liquid container 10 for storing tea, miso soup, etc.
It can be stored freely in and out.

In the above configuration, the embodiment shown in FIG. An annular upward step part 18, 18 is formed over the support part 1 that contacts and supports the outer periphery, and an annular outward facing flange formed on the upper outer periphery of the rice bowl 9 and the liquid container 10 is formed on the step part 18, 18. The space formed by the inner wall of the main container 3 and the outer surface of the inner container 8 below the upward step part 18 which extends over the supporting part 1, that is, the main body. An airtight chamber A is provided in a space surrounded by the inner wall of the container 3, the outer surface of the rice bowl 9, and the outer surface of the liquid container 10, and a space surrounded by the inner wall of the main container 3 and the outer surface of the liquid container 10, respectively.

It is formed by forming A.

In addition, in FIG. 1, the outward facing collar portion 13.13 is
They are formed on the outer walls of the rice bowl lid 9a and the liquid container lid 10a, which form the upper outer periphery and upper surface of the rice bowl 9 and the liquid container 10, respectively, and are supported by step portions 18, 18, respectively.

The outward facing flange 13 is provided only on the upper outer circumferential side of the rice bowl 9, and the step 18 on which the flange 13 is supported is also formed at one location at an appropriate height on the inner wall of the main body container 3. The liquid container 10 is suspended by the rice container 9 by connecting the lid forming the top surface of the liquid container 10 to the bottom of the rice container 9, so that the outward facing flange 13 of the liquid container 10 and the main container 3 are connected to each other. Upward step 1
8 may also be implemented.

10b is an inner lid for preventing the liquid inside the liquid container 10 from leaking.

Reference numeral 15 denotes a vegetable container for storing side dishes, which is placed between the rice bowl 9 and the lid 7 at the shoulder portion 1a of the main body.

By changing the upward step portion 18 shown in FIG. 1 to an appropriate position,
The stepped portion 18 has an outward facing flange 1 formed on the outer surface of the inner container 8.
3, in order to support the outer circumferential edge of the bottom of the inner container 8 in a linear or band-like contact with the inner wall of the main container 3 and the inner container 8.
It is also possible to form an airtight chamber A between the two.

FIGS. 2 and 3 show another embodiment, in which a rice bowl 9 and a liquid container 10 are provided as the inner container 8, and a vegetable container 15 is provided on the shoulder portion 1a of the main body, as in the previous embodiment. The main body 1 is formed into a thin book shape with a narrow width and an elongated height, and the rice bowl 9 and the liquid container 10 are
are each shaped like a horizontally long rectangular parallelepiped and stored in and out of the main body and container 3, and a heat insulating material 4 such as foamed urethane is filled between the outer case 2 and the main container 3 to a required thickness to have a heat insulating effect. The rice bowl 9 is placed sideways with respect to the upright state of the main body 1, and the opening lid 9b of the rice bowl 9 is placed sideways, and the inner wall of the main body container 3 is tilted downward and upward. A part of the inclined side wall 12 is used as a support part 11, and an annular outward facing flange 13.13 formed on the outer peripheral side of the rice bowl 9 and liquid container 10 is attached to the support part 11 as a line or band surface. The inner wall of the main container 3 below the outward facing flange 13 and the outer surface of the inner container 8 consisting of the rice bowl 9 and the liquid container 10 are similar to those in the above embodiment in order to contact and support the same. It is formed by forming airtight chambers A and A.

10C is the stopper lid of the liquid container 10.

Such a thin device can be carried around by office workers, schoolchildren, students, etc. in a normal bag, and therefore can be widely used.

FIG. 4 shows another embodiment, in which the inner wall of the main container 3 is made into a downwardly upwardly inclined surface, and a part of the inclined side wall 12 is made into a supporting part 11, as in the above embodiment. ,
An inner container 8, a rice container 9, and a liquid container 10 are attached to the support portion 11.
The bottom outer peripheral side edge 14.14 of the bottom part is in contact with and held in a line or strip shape, and the airtight chamber A is formed between the inner wall of the main body container 3 below the support part 11, the outer surface of the rice bowl 9, and the outer peripheral side of the liquid container 10. was formed.

According to this, there is an advantage that the inner container 8 can be held in contact with the main container 3 without forming the outward flange 13 as in the above embodiment.

Reference numeral 16 denotes a latching tool that is engaged with a latching portion 17 formed on the lower edge of the lid 7, and a hanging string (not shown) is attached to the latching tool 16.

In each of the above embodiments, the inner container 8 includes a rice bowl 9 and a liquid container 1.
However, it is also possible to provide only the rice bowl 9 and form one airtight chamber A between the upper outer surface of the rice bowl 9 and the inner wall of the main container 3.

Alternatively, a rice bowl 9, a miso soup liquid container 10, and a water bottle (not shown) containing a drink such as tea may be provided to form an airtight chamber A between each container and the main container 3. can.

Further, in each embodiment, the lid 7 is provided above the vegetable container 15 placed on the main body shoulder portion 1a so as to be openable and closable, but the main body shoulder portion 1a may be changed as appropriate without providing the vegetable container 15. Alternatively, the lid 7 may be provided directly on the shoulder portion 1a.

According to this invention having the above configuration, the main container 3
A support part 11 is formed at an appropriate position on the inner wall of the support part 1.
1 contacts and supports the outer periphery of the inner container 8, and the space formed by the inner wall of the main container 3 below the support part 11 and the outer surface of the inner container 8 is defined as an airtight chamber A. 6, etc., the loss of heat by convection can be reduced.

Therefore, the present invention can prevent heat loss due to heat convection and improve the heat retention effect of the contents of the inner container 8 such as the rice bowl 9 or the liquid container 10.

[Brief explanation of drawings]

Each of the drawings shows an embodiment of this invention, and FIG. 1 is a front view showing a part of the first embodiment in longitudinal section, and FIG. 2 is a front view showing a part of another embodiment in longitudinal section. Front view shown, 3rd
The figure is a perspective view of the rice bowl and liquid container shown in FIG. 2, and FIG. 4 is a front view showing a part of another embodiment in longitudinal section. 1...Main body, 3...Main container, 4...
...Insulation material, 5...Double vacuum bottle, 7...
... Lid body, 8 ... Inner container, 11 ...
Support part, 12... Inclined side wall, 13...
Outward facing flange, 14...Outer peripheral edge, 18...
...Upward step, A...Airtight room.

Claims (3)

[Scope of utility model registration request] (1) A main body 1 having a heat insulating material 4 or a double vacuum bottle 5 arranged between an outer case 2 and a main container 3, a lid body 7 for opening and closing an upper opening 6 of the main body 1, and a main container. In a heat-retaining lunch box equipped with an inner container 8 such as a rice bowl 9 or a liquid container 10 that can be freely put in and taken out inside the main container 3, the outer periphery of the inner container 8 is brought into contact with an appropriate position on the inner wall of the main container 3. A heat-retaining lunch box characterized in that a supporting part 11 is formed, and a space formed by the inner wall of the main container 3 below the supporting part 11 and the outer surface of the inner container 8 is an airtight chamber A. (2) The support part 11 is an annular upward step 18, and the upward step 18 is to support an annular outward flange 13 formed on the outer periphery of the inner container 8. Insulated lunch box described in scope item (1). (3) The support portion 11 is formed as a part of the inclined side wall 12 with an upward slope from the top to the bottom, and the support portion 11 has an outward facing collar portion 13 or The heat-retaining lunch box according to claim (1), which is intended to support the outer peripheral side edge 14 of the inner container 8.