JP2612813B2 - Multi-stage lunch container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lunch box, and more particularly to a multi-stage lunch box in which a plurality of containers are stacked and used.

[0002]

2. Description of the Related Art A lunch container stores and transports a single serving of food, so that it must be able to store, for example, a staple food and an auxiliary food separately. 2. Description of the Related Art Partitioning by a plate and division of a container into a plurality are performed. Partitioning with a partition plate has the disadvantage that if the partition plate moves freely with respect to the container, the broth or the like will move to another place, whereas if the partition plate is fixedly provided with respect to the container, free storage is possible. However, there is a drawback that it is not easy to wash, and it is no longer adopted anyway. In that respect, if the storage container is divided into a plurality, the above-mentioned problem can be solved, but since each container is individually separated, it must be a structure that can be integrated for convenient transportation. There is a need.

As a prior art which satisfies this need, there is, for example, a "combination sealed container" disclosed in Japanese Utility Model Publication No. 4-17499. As shown in FIG. 4, this combined airtight container has a lower container (3) covered with an inner lid (14) against a cover (9) storing an upper container (15).
Must be integrated by being stopped by a pair of stoppers (19), the lower container (3) and the inner lid (1).
4) a locking edge and a cover (9) with a stop (19)
The engagement piece (23) for locking the projection must be formed to protrude. These protrusions are not only easily damaged, but also hinder the washing, and the work of engaging the stopper (19) with them must be performed. Is considered very inconvenient.

[0004] Not only that,
In the combined airtight container disclosed in Japanese Patent Application Publication No. 9-29, as shown in FIG. 4, the lower container (3), the cover (9) and the upper The side wall of the container (15) must be inclined, and when the contents are to be stored and stacked in the lower container (3) and the upper container (15), the upper container (1) is required.
Regarding 5), a seal (6) for ensuring sealing with the cover (9) must be provided on the cover (9) side. Therefore, in the conventional combination closed container shown in FIG. 4, if another upper container (15) is to be added, the upper container (15) is replaced with the inner lid (14) in the lower container (3). If the same inner lid is not provided, it will not only be impossible to seal but also the stopper (19)
Must be provided or the shape must be large.

[0005] As shown in FIG. 5, there is a "container box" proposed in Japanese Utility Model Publication No. 15-27014, which does not have such a stopper. In this insertion heavy box, a plurality of boxes 1 whose size changes sequentially
Each of the box bodies 1 is formed with a protruding edge 2 having a bottom periphery protruding from the box side.
As shown in FIG. 5C, a step-like ridge 3
Is formed. In such a loading heavy box, as shown in FIG. 5A, the boxes 1 containing the contents can be stacked, and the used boxes 1 can be stacked as shown in FIG. As shown in (1), it is possible to reduce the overall volume and compactly overlap.

However, it is thought that the following problem is caused in this loading box. Since the ridge 3 is very thin and planar as shown in FIG. 5C, it is not easy to fit the ridge 3 into the upper opening of the lower box 1. This is because, when each box 1 is to be fitted with each other, the flat and very thin ridge 3 easily slides through the opening edge of the lower box 1 and the direction of each box 1 is changed. This is because it is considered that the fitting cannot be performed unless they are completely matched. At last, each ridge 3 is fitted to the lower box 1 and each box 1
Even if stacking is possible, the ridges 3 are very thin and planar, so when trying to wrap the whole with wrapping cloth etc., the gaps between the boxes 1 are easily displaced. The wrapping operation becomes very difficult. Further, as shown in FIG. 5B, when the boxes 1 are stacked, the ridges 3 are planar, and there is moisture or dirt on the inner bottom surface of the box 1. Then, it is considered that the outer surface of the ridge 3 and the inner bottom surface of the other box body 1 come into close contact with each other, and it becomes impossible to peel off each box body 1.

The inventor of the present invention can solve the above-mentioned various inconveniences and, at the same time, how to store an empty container so that the entire container can have a small volume. As a result of various studies on
Notice that this type of bento container is not carried as it is, but is wrapped in another thing such as a handkerchief, and that it is required to be able to easily wash used items Thus, the present invention has been completed.

[0008]

SUMMARY OF THE INVENTION The present invention has been made on the basis of the above-mentioned situation and circumstances, and the problem to be solved is the inconvenience in using a conventional lunch container.

An object of the present invention is to reduce the volume of the battery when it has been used up, to make it easier to carry, and to make the structure simpler to prevent breakage. An object of the present invention is to provide a multi-stage lunch container that can be easily washed and that can be stacked in multiple stages.

[0010]

In order to solve the above problems BRIEF SUMMARY OF THE INVENTION, means of adopting the present invention is explained with reference numeral used in the examples, as "main container 10, the inner cover 36
And fitted one Chuyo 30 - 2 0 even without low as, a multistage lunch container 100 and a lid 40 which is fitted engaged to the main vessel 10, these main container 10, the container 20.3
0 as well as the side walls 11, 2 1, 31, 4 1 及 beauty cover 40 from its respective bottom surface and that rises vertically, to reduce the main container 10 and intermediate vessel 2 0 - 30 profile in this order, middle the lower periphery of the container 2 0 · 30, the engaging portion 2 4 which engages on the side wall upper end surface of the main container 10, or other inside the container 20
34 is provided in a state where the fitting bottom 25.35 is left at its lower part, and the shape of the outer corner of the fitting bottom 25.35 is made to facilitate fitting on the lower container. a substantially arc shape, the container 2 0 While on the inside of the fitting bottom 2 5 · 35
- 30 lower surface provided Itojiri 2 3 · 33, further inner cover 3
6 of the middle container 30 into which the bottom 6 is fitted.
Upper and formed by the side wall 31 and the engaging portion 34
At the corner, the thickness is about the thickness of the outer edge 36a of the inner lid 36.
Is formed, and the separation step 37 is formed.
And the outer edge 36a of the inner lid 36, the inner container 30
When stored in the middle container 20 or the main container 10, the side wall 2
A multistage lunch container 100, wherein "the 1 or was due Unishi <br/> forming a separation space 38 between the 11.

Here, it is necessary that the shape of the outer corner of the fitting bottom 25 be substantially arcuate so as to make it easy to fit on the lower container. ,
This is to facilitate the fitting of the middle containers 20 and 30 to the lower container during stacking. The reason why the fitting bottom portion 25 needs to be left under the engaging portion 24 is to prevent the containers from being displaced from each other when the containers are stacked, so that the wrapping operation of the containers can be performed reliably. To do that. Further, the thread bottom 2 is provided on the lower surface of the inner container 20 inside the fitting bottom portion 25.
The reason why it is necessary to provide 3 is that when piled up after use, a space is formed between the thread butt 23 and another container,
This is because even if moisture or dirt remains inside each container, it is possible to prevent close contact between them.

Then, in the multi-stage lunch container 100,
For the inner container 30 to which the inner lid 36 is fitted,
Immediately above the bottom 35, the side wall 31 and the engaging portion 34
Of the outer edge 36a of the inner lid 36
The separation step 37 having a thickness of about the thickness was formed.
As a result, the inner container 30 is
When stored in the container 10, the separation step 37 and the inner lid 3
6 and between the side wall 21 and 11 by the outer edge portion 36a.
A separation space 38 is formed in the separation space 3
8, the inner container 30 and the other inner container 20 or main container
10 does not adhere.

[0013]

The multi-stage lunch container 100 constructed as described above
Is used by putting the contents in each container and stacking them as shown in FIGS. 1 and 2.
0, the fitting bottom 25 is fitted into the main container 10 and the engaging portion 24 is engaged with the upper end of the side wall 11 of the main container 10, and the second middle container 30 has the fitting bottom 35 Middle container 2
0 and the engagement portion 34 is engaged with the upper end of the side wall 21 of the first inner container 20.

At this time, in each of the inner containers 20 and 30, the fitting bottom portions 25 and 35 to be fitted in the main container 10 and the inner container 20 are, as shown in FIG.
The shape of the outer corners left at the bottom of 4.34 and
Since each of the middle containers 20 and 30 is easily fitted to the lower container, it is formed in a substantially arc shape so as to be easily fitted on the lower container. Specifically, in this case, since the stacking is performed in a state where the contents such as rice and side dishes are packed in each container, each container cannot be tilted too much at the time of stacking, as described above. In order that the substantially arc-shaped outer corners of the fitting bottoms 25 and 35 having different heights serve as a guide to the opening of the lower container, each of the inner containers 20
・ The stacking of the lower container of 30 can be performed smoothly. Of course, the positioning of each fitting bottom 25, 35
This is achieved by engaging the upper engaging portions 24 and 34 with the upper ends of the side walls 11 and 21.

Then, the uppermost second middle container 30 is placed in the inner lid 3.
6, and the whole is covered with the lid 40. Therefore, as for the first middle container 20, the bottom surface 32 of the second middle container 30 functions as a lid, so to speak, so that the first middle container 20 is
It does not require an inner lid like the inner lid 36. Of course, the main container 10, the first middle container 20, and the second middle container 30
Have a smaller outer shape in this order, so that their stacking is stable.

Further, the multi-stage lunch container 10 as described above is provided.
Although not shown in the figure, the entirety of the container 0 is fixed by wrapping with a handkerchief or the like employed in this type of lunch container. The multi-stage lunch container 100 is also shown in FIG. Stopper (1
9) is completely unnecessary. This is because the fitting bottoms 25 and 35 of the respective inner containers 20 and 30 are provided in a state where they are left below the engaging portions 24 and 34 as described above. This is because the lateral displacement of each of the middle containers 20 and 30 with respect to the lower container is prevented by being fitted inside. That is, the entire wrapping operation using a handkerchief or the like can be performed without concern for the mutual displacement of the containers, and after wrapping, the containers can be transported so as not to come off from each other. .

That is, in this multi-stage lunch container 100, since no member for fixing the whole is required, the engaging piece (23) as shown in FIG. Container 10, first middle container 20, second middle container 3
The shape of the cover 0 and the cover 40 is simplified, and the cover 40 is hardly damaged. In addition, since there is no stopper (19) and the engaging piece (23) therefor as shown in FIG. 4, the whole can be easily cleaned.

When the meal is completed, the containers constituting the multi-stage lunch container 100 are housed in each other as shown in FIG. 3 so as to have a volume of about 1/3 in the embodiment shown in the drawings. It becomes the thing of. This can be performed because the side wall 11 of the main container 10, the side wall 21 of the first inner container 20, the side wall 31 of the second inner container 30, and the side wall 41 of the lid 40 are vertically raised from the respective bottom surfaces. ,
The stacking described above can be performed. Moreover, the engaging portion 24 of the first middle container 20 and the engaging portion 34 of the second middle container 30 have the same diameter that does not protrude from the side wall 11 of the main container 10 or the side wall 21 of the first middle container 20, respectively. Therefore, the respective storage and the fitting of the lid body 40 are possible. In addition, these engagement parts 24 and 34
For example, if the multi-stage lunch container 100 is, for example, of a substantially square shape, it may be partially provided at the corner thereof, or if the multi-stage lunch container 100 is of another shape including a square, the whole Although it may be provided in an annular shape so as to be present, engagement with the other can be reliably performed in any of the partial and annular cases.

This multi-stage lunch container 100 must be washed after being brought back as shown in FIG.
As described above, each container and lid not only have no protrusion, but they do not have a partition plate, so that they can be easily washed. In particular, if there is a projection such as a locking piece (23) on the outer surface as in the closed container shown in FIG. 4, the surrounding clearance must be carefully cleaned. Such a thing is completely unnecessary in the lunch container 100. Also, if there is a projection such as the locking piece (23), the projection may collide with another tableware during washing and may be easily damaged. Don't worry.

Further, in the multistage lunch container 100 of the embodiment shown below, the first middle container 20 and the second middle container 30 are provided with thread ends 23, 33 on the bottom surfaces 22, 32, respectively. When stored in each other as shown in 3,
The bottom surface 32 of the second middle container 30 does not adhere to the inner surface of the bottom surface 12 of the main container 10, and the bottom surface 22 of the first middle container 20 does not adhere to the inner surface of the lid 40. For this reason, the dirt on each inner surface is
Is prevented from adhering to the bottom surface 22 and the like, and can be easily taken out of each other because they do not adhere to each other.

This lack of close contact with each other is a
By the action of the space 38, the middle container 30 and the other middle container 2
0 or the relationship with the main container 10
You. That is, in this multi-stage lunch container 100,
For the inner container 30 to which the inner lid 36 is fitted, the fitting bottom 3
5 and formed by the side wall 31 and the engaging portion 34
The thickness of the outer edge 36a of the inner lid 36
Since the separation step portion 37 having a thickness of about
The container 30 is stored in another medium container 20 or the main container 10.
When the separating step 37 and the outer edge 36a of the inner lid 36 are
As a result, as shown in FIG.
In addition, the separation space 38 is positively formed. this
The separation space 38 is provided inside the other inner container 20 or main container 10.
Even if the surface remains dirty, the inner container 30
Since the side wall 31 is separated, the side wall 31
And the other inner container 20 or main container 10 are contaminated on the inner surface thereof.
This prevents it from sticking. Therefore,
Is the inner container 30 in the other inner container 20 or the main container 10
Can be easily taken out of
You can easily start.

Further, the inner container 30 into which the inner lid 36 is fitted is provided.
For the side walls 31 der directly above the Hamagosoko portion 35 engages
The corner portion formed by the
A separation step 37 having a thickness about the same as the outer edge 36a is formed.
Since formed, the inner container 30 is replaced with another inner container 20 or a main container.
When stored in the container 10, as shown in FIG.
The separation step 37 is the opening of the other middle container 20 or main container 10.
, So that the inner container 30 is
There is no rattling in the container 20 or the main container 10,
The small-sized inner container 30 is the multi-stage lunch container 10
No abnormal noise is generated when carrying 0 or the like. In addition,
The other inner container 20 or main container 10 of this inner container 30 is
The positioning of the inner lid 36 inside the separation step 37 is performed.
This is also achieved by the outer edge 36a.

The above operation is not limited to the case where three storage portions are formed as in the case of the multi-stage lunch container 100 shown in the embodiment, but also the case where the number of middle containers is reduced or increased. This is also true. In other words, for example, by setting the multi-stage lunch container 100 having an increased number of the middle containers as one product, by appropriately selecting the number of the middle containers, the total number of the multi-stage lunch containers 100 at the time of storage is reduced. It is possible to increase or decrease the volume without impairing the above-described operation.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a multi-stage lunch container 100 according to the present invention will be described with reference to an embodiment shown in the drawings. FIGS. 1 to 3 show a main container 10 and a first container which can be accommodated in the main container 10. Shown is a multi-stage lunch container 100 including an inner container 20, a second inner container 30 that can be stored in the first inner container 20, and a lid 40 that is externally fitted to the main container 10, As shown in FIG. 2, the multi-stage lunch container 100 can constitute a total of three storage portions. In addition, the number of storage
As described above, it can be appropriately changed.

The main container 10, the first middle container 20, and the second middle container 30 have side walls 11, 21, 31 rising vertically from respective bottom surfaces 12, 22, 32. Each has a sufficient volume. Of course, the main container 10, the first middle container 20
As shown in FIG. 3, the second middle container 30 completely stores the first middle container 20 containing the second middle container 30 in the main container 10. 31
Are designed to decrease in height in this order. And these main container 10, the first middle container 20, and the second middle container 30
Is a thread butt 13 on the outside of each of the bottoms 12, 22 and 32.
・ It has 23 ・ 33.

Further, the first middle container 20 and the second middle container 30
As shown in FIGS. 2 and 3, the engagement portions 24 and 34 are provided on the outer periphery of the lower portion while leaving the fitting bottom portions 25 and 35, respectively. These engaging portions 24
34 is to engage with the side wall 11 of the main container 10 and the upper end surface of the side wall 21 of the first middle container 20, respectively, but not to protrude outward from the respective engaging side walls 11 and 21. It is. If these engaging portions 24 and 34
This is because if they protrude outward from the side walls 11 and 21, they cannot be stored in each other as shown in FIG. In addition, these engaging portions 24 and 34 may be provided by being provided partially in the corresponding portion, or may be provided and carried out as a ring-shaped part.

As shown in FIG. 2, the fitting bottom portions 25 and 35 provided on the engaging portions 24 and 34 of the first and second inner containers 20 and 30 are connected to the main container 10 and the first and second inner containers 20 and 30, respectively. Container 20
Are fitted in the side walls 11 and 21, thereby preventing a positional deviation when they are stacked on each other. In this sense, the outer shapes of the fitting bottoms 25 and 35, that is, the outer shapes of the first and second inner containers 20 and 30 are defined by the side wall 11 of the main container 10 and the side wall 2 of the first inner container 20.
When the inner shape is substantially the same as the inner shape of No. 1, it is more preferable because the movement at the time of stacking can be restricted to prevent rattling noise. In particular, the fitting bottom portions 25
Numeral 35 is provided in a state left under the engaging portions 24 and 34, as shown in FIG.

In this multi-stage lunch container 100,
Is the fitting bottom of the inner container 30 to which the inner lid 36 is fitted.
Right above the portion 35 and by the side wall 31 and the engagement portion 34
The thickness of the outer edge 36a of the inner lid 36 is
A separation step 37 having a small thickness is formed. This
Of spaced stepped portions 37, the middle vessel 30 vessel 20 or in the other
When stored in the main container 10, as shown in FIG.
Positioning at the opening of the middle container 20 or the main container 10
And other middle containers 20
Alternatively, the stability in the main container 10 is improved.
Therefore, the inner container 30 having the separation step 37 is not
Do not rattle in the middle container 20 or the main container 10.
When transporting the multi-stage lunch container 100,
No abnormal noise is produced. In addition, this inside container
30 relative to other inner container 20 or main container 10
The outer edge 36 of the inner lid 36 inside the separation step 37
a.

Further, in the multi-stage lunch container 100,
For the inner container 30, the side wall 31 and the engaging portion 34
The separation step portion 37 formed at the corner portion formed thereby
And the outer edge 36a of the inner lid 36, the inner container 30
When stored in the middle container 20 or the main container 10, the
Between the side wall 31 of the vessel 30 and the side wall 21 or 11
As shown in FIG. 3, the separation space 38 is formed.
You. This separation space 38 is used for the other inner container 20 or main container.
Even if the inner surface of 10 remains dirty,
For separating the side wall 31 of the vessel 30 from the
0 and the other inner container 20 or main container 10
This is to prevent adhesion due to dirt on the inner surface.
You.

The multi-stage lunch container 100 of this embodiment
In the above, the second middle container 3 located at the uppermost stage
Although the opening of the side wall 31 is covered with a middle cover 36 fitted to the opening, the packing may be provided on the inner surface of the cover 40 in place of the middle cover 36. It is. Of course, the inner lid 36 may be attached to the first inner container 20 or another inner container, and may be implemented so that it is not used except for the uppermost inner container.

The lid 40 covers the whole of the multi-stage lunch container 100 in a state where the containers are stacked, and as shown in FIG. 3, another container is stored in each container. Multi-stage lunch container 100 with reduced overall volume
The outer shape of the side wall 41 can be fitted to the side wall 11 of the main container 10 from the outside, that is, can be fitted outside.

In the multi-stage lunch container 100 of this embodiment, the main container 10, the first middle container 20, the second middle container 30, and the lid 40 are integrally formed of a hard synthetic resin. The inner lid 36 fitted to the side wall 31 of the second inner container 30 is integrally formed of a soft synthetic resin.

[0033]

As described above, according to the multi-stage lunch container 100 according to the present invention, the main container 10 and the inner lid 36 are
At least one inner container 30/20 to be fitted,
Multi-stage valve housing having a lid 40 externally fitted to the vessel 10
Container 100, and the main container 10, the middle container 20,
0 and the side walls 11, 21, 31 and 41 of the lid 40
It shall stand vertically from the bottom and the main container
10 and the outer shapes of the inner containers 20 and 30 are reduced in this order.
And the main container 10 or
Is an engaging portion 24 that engages with the upper end surface of the side wall of the other inner container 20.
・ 34 with fitting bottoms 25 and 35 left below
And the outer corners of the fitting bottoms 25 and 35
Shape of a circular arc to facilitate fitting on the lower container
And the inner container 20 inside the fitting bottoms 25 and 35
- 30 lower surface provided Itojiri 23 and 33 of the further inner cover 3
6 of the middle container 30 into which the bottom 6 is fitted.
Upper and formed by the side wall 31 and the engaging portion 34
At the corner, the thickness is about the thickness of the outer edge 36a of the inner lid 36.
Is formed, and the separation step 37 is formed.
And the outer edge 36a of the inner lid 36, the inner container 30
When stored in the middle container 20 or the main container 10, the side wall 2
1 or 11 so as to form a separation space 38 between them.
And "to have features on its configuration, which makes it possible to simplify the carry to be able to reduce the volume when finished to use, less fragile by those of simpler structure, It is possible to provide a multi-stage lunch container that can be easily washed and that can be stacked in multiple stages.

That is, the multistage lunch container 1 according to the present invention.
According to 00, the shape of the outer corner portion of the fitting bottom 25 is formed in a substantially arc shape for facilitating the fitting on the lower container. The fitting of the middle containers 20 and 30 to the lower container can be facilitated. In addition, these fitting bottom portions 25 and 35
Is provided in a state left under the engaging portions 24 and 34,
It is possible to prevent the displacement of the containers when they are stacked and prevent the containers from being wrapped or the like.
Furthermore, the inner containers 20 and 3 that are inside the fitting bottom 25
Since the thread ends 23 and 33 are provided on the lower surface of the container 0, when they are stacked after use, a space is formed between the thread ends 23 and 33 and other containers, and moisture remains inside each container. Even if it does, the close contact of each other by this can be prevented, and as a result, each container can be easily washed.

Further, the multistage lunch container 100 have a two in the container between the first container 20 and second container 30, when superimposed by inverting each container after use, Fig. As shown in FIG. 3, the opening edge of the first middle container 20 is placed on the engaging portion 34 of the second middle container 30, and the first middle container 20 fitted on the second middle container 30 is Since the second inner container 30 can be supported in a floating state, a predetermined space is provided between the outer surface of the inner cover 36 fitted to the second inner container 30 and the inner bottom surface of the first inner container 20. Can be formed. Therefore, even if moisture or dirt remains inside the first container 20, it is possible to prevent the first container 20 from adhering to the inner lid 36 on the second intermediate container 30 side, and as a result, each container 20. 30 can be easily separated and these washings can be easily performed.

Further, according to the multi-stage lunch container 100,
If the inner container 36 to which the inner lid 36 is fitted is fitted,
Right above the portion 35 and by the side wall 31 and the engagement portion 34
The thickness of the outer edge 36a of the inner lid 36 is
Is the separation step 37 having a thickness of about 3 mm formed?
The separation step 37 allows the middle container 30 to be separated from the other middle containers 20.
Or, when stored in the main container 10,
To achieve stable positioning in the
At the time of transportation of the multi-stage lunch container 100 which is compacted
No abnormal noise is produced. In addition, the separation step 3
7 and the outer edge 36a of the inner lid 36,
When stored in the middle container 20 or the main container 10, the side wall
As shown in FIG.
Since the space 38 is formed, the other inner container 20 or
Indicates that even if the inner surface of the main container 10 remains dirty,
From the side wall 31 of the inner container 30.
Side wall 31 of middle container 30 and other middle container 20 or main container
10 and do not adhere to each other due to dirt on its inner surface
This inner container 30 can be replaced with another inner container 20 or
It can be easily taken out of the main container 10 and
You can start your business easily.

[Brief description of the drawings]

FIG. 1 is a perspective view of a multistage lunch container according to the present invention.

FIG. 2 is a partially cutaway front view showing a state in which the containers of the multistage lunch container are stacked.

FIG. 3 is a partially cutaway front view showing a state where the containers of the multi-stage lunch container are housed in each other to reduce the overall volume.

FIG. 4 is a partially cutaway front view showing a conventional technique.

FIGS. 5A and 5B show another conventional technique, in which FIG. 5A is a partially cutaway front view showing a state in which containers are stacked, FIG. 5B is a cross-sectional view when they are stacked after use, and FIG. It is the perspective view which turned the container over.

[Explanation of symbols]

 100 Multi-stage lunch container 10 Main container 20 First middle container 30 Second middle container 40 Lid 11.21.31.41 Side wall 12.22.32 Bottom 13.23.33 35 Fitting bottom 37 Separation step 38 Separation space

Claims (1)

(57) [Claims] And 1. A main container, a a container in one even without least the inner lid is fitted, multistage lunch container with a lid member fitted outside to the main container, these main The side walls of the container / middle container and the lid are to rise vertically from their respective bottom surfaces, and the outer shapes of the main container and the middle container are reduced in this order, and the main container or other An engagement portion that engages with the upper end surface of the side wall of the middle container is provided with a bottom portion left at the bottom thereof, and the shape of the outer corner of the bottom portion is fitted onto the lower container. The inner container has a substantially circular arc shape for facilitating the fitting, a thread tail is provided on the lower surface of the inner container inside the fitting bottom, and the inner container to which the inner lid is fitted is further fitted.
Immediately above the bottom, formed by the side wall and the engaging portion
In the corner part, the thickness of about the thickness of the outer edge of the inner lid
Forming a separation step having the separation portion and the outer edge of the inner lid
Depending on the part, the middle container is placed in another middle container or the main container.
When stored, a space is formed between the side walls.
Multistage lunch container, characterized in that was the cow.