JPH0880212A - Lunch box - Google Patents

Abstract

PURPOSE: To provide a lunch box in which a sheet containing an antibacterial chemical applies an antibacterial effect to whole the contents, and provides a stable antibacterial capability even if the sheet is put into the lunch box from any direction. CONSTITUTION: The both side edges of a sheet 3 is adhered to the inside of the lid 2 of a lunch box. A gap is formed between the center part of the sheet 3 and the lid 2 so that instruments for meal can be put into. An antibacterial chemical, which produces an antibacterial gas with humidity, is applied to the sheet 3. The antibacterial gas and humidity are passed through the gap between the sheet 3 and the lid 2 and flowed between the surface of the sheet and the rear face thereof, so that, the antibacterial gas produced is diffused inside the lunch box.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple type lunch box containing folded bent boxes and the like, and more particularly to a structure for effectively exerting an antibacterial effect for improving shelf life of food inside the lunch box. Is.

[0002]

2. Description of the Related Art Conventionally, an antibacterial agent such as a horseradish extract is attached to a flexible resin sheet, and the sheet is stored inside a lunch box together with food. Attempts are made to improve the shelf life.

However, since the conventional antibacterial preparation exerts an antibacterial effect only in a portion in contact with food, it has almost no antibacterial activity against food which does not come into contact therewith, and exhibits a sufficient antibacterial effect on the whole food. There was a difficult problem.

Further, since it is necessary to directly contact the sheet with food as described above, it is necessary for the conventional sheet with an antibacterial preparation to be inserted into a lunch box with the surface of the preparation facing the food. However, when the antibacterial agent is attached to the surface of a transparent sheet, it is difficult to know which surface of the sheet the antibacterial agent is attached to. Therefore, there is a problem that the operation of inserting the sheet into the lunch box is likely to be incorrect. there were.

Further, in the conventional bent bento, a film may be adhered to the inner surface of the lid, and food utensils such as chopsticks and hand towels may be stored between the film and the lid. When the sheet with the formulation attached is used, the above-mentioned eating utensil is stored on the back side of the sheet without the antimicrobial formulation attached. For this reason, the eating utensil itself cannot receive an effective antibacterial action, and there is a problem that bacteria adhered to the surface of the eating utensil are likely to remain for a long time without being excluded.

Therefore, the present invention solves the above problems and allows the antibacterial effect of the antibacterial agent to be uniformly applied to the food inside the lunch box and the entire eating utensil, and the seat insertion direction is different. The present invention aims to provide a lunch box structure that does not cause a change in the antibacterial effect.

[0007]

In order to solve the above-mentioned problems, the present invention has a flexible sheet having an antibacterial agent which generates an antibacterial gas by the action of moisture adhered or contained therein, and a part of the sheet is attached. It was adhered to the inner surface of the lunch box, and most of the surface of the sheet was formed so as to follow the inner surface of the lunch box in a non-adhered state.

In the above structure, both side edges of the sheet are adhered to the inner surface of the lid of the lunch box, and a pocket-shaped space for inserting the eating utensil is formed between the central portion of the sheet and the lid. You may do it.

The second means of the present invention is to form a large number of small holes substantially uniformly on the entire surface of the above-mentioned sheet, and at least one surface of the sheet has minute holes surrounding the small holes. The structure with the protrusions was adopted.

[0010]

[Function] As described above, when the antibacterial gas is generated from the sheet by the humidity, when the inside of the lunch box is in a hot and humid environment where bacteria and mold are easily propagated, the humidity causes the antibacterial gas from the sheet. Occurs and fills the inside of the lunch box, creating an antibacterial atmosphere and exerting an antibacterial effect on the entire food.

Further, by making most of the surface of the sheet non-adhesive to the inner surface of the lunch box, even when the sheet is inserted with the surface on which the antibacterial agent is adhered facing away from the food, the sheet is inserted. Since moisture and antibacterial gas can be circulated from the gap between the lunch box and the lunch box, the antibacterial effect can be exerted without any change. On the other hand, if the second means is adopted, the moisture will pass through many small holes formed in the sheet. Since the antibacterial gas can be circulated, the antibacterial gas can be more efficiently filled inside the lunch box. Further, by setting the surface side of the sheet provided with the protrusions toward the food, each protrusion can eliminate the entire contact between the sheet and the food and prevent the adhesion phenomenon between the food and the sheet.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the lunch box of the embodiment comprises a food storage case 1 and a lid plate 2 that is foldably connected to the opening of the storage case 1 and is entirely made of cardboard. It is made of cardboard with flexibility.

On the inner surface of the cover plate 2, a sheet 3 containing an antibacterial agent is attached in a size that covers almost the entire surface of the cover plate 2.

This sheet 3 has its both side edges 3a, 3a adhered to the cover plate 2, and the central portion 3b is in a non-adhesive state separated from the cover plate 2 within a wide area.
A pocket-shaped gap 5 for accommodating a eating utensil 4 such as chopsticks or a towel is formed between the central portion 3b of the and the lid plate 2.

As shown in FIG. 3, the antibacterial agent-containing sheet 3 has an antibacterial agent layer 7 formed by coating or printing on the surface of a flexible synthetic resin film 6 such as polyethylene or polypropylene. The surface of 7 is wrapped with paraffin coat 8 such as cyclodextrin.

As the antibacterial preparation attached to the sheet 3, a horseradish extract approved as a food additive is mainly used, and an antibacterial gas which reacts with water to generate an antibacterial gas is used.

Further, in the above-mentioned sheet 3, the antibacterial agent layer 7
The paraffin coat 8 prevents the antibacterial components from easily volatilizing. When water enters the antibacterial agent layer through the paraffin coat 8, antibacterial gas is generated and released to the outside. It has become.

It should be noted that the surface of the film 6 of the sheet 3 is preferably subjected to antifogging treatment by adhesion of a surfactant or the like so as to suppress the generation and adhesion of water droplets on the surface of the sheet.

The lunch box of the embodiment has the above-mentioned structure, and as shown in FIG. 4 (a), the food A is stored in the storage case 1, and the chopsticks are inserted in the gap 5 between the cover plate 2 and the sheet 3. An eating utensil 4 such as a towel or a towel is inserted, and the cover plate 2 covers the opening of the housing case 1 for use.

In this usage condition, when the moisture inside the lunch box rises due to the moisture or hot air of the food A, the antibacterial gas in the antibacterial agent layer 7 of the sheet 3 is volatilized by the action of the moisture,
It is released inside the lunch box.

The released antibacterial gas fills the inside of the lunch box and creates an antibacterial atmosphere, so that the antibacterial effect acts uniformly on the whole food A, and bacteria and mold on the surface of the food A are generated. Prevent.

The antibacterial gas released from the sheet 3 enters the back side of the sheet 3 from between the non-adhesive sheet central portion 3b and the lid plate 2 and acts on the eating utensil 4 inserted in that portion. Therefore, generation of bacteria and mold on the surface of the eating utensil 4 can be prevented, and the entire contents of the lunch box can be completely kept in an antibacterial state.

On the other hand, when the sheet 3 is attached so that the surface provided with the antibacterial agent layer 7 and the lid plate 2 face each other, contrary to the above, the sheet 3 and the lid to which the moisture generated from the food A is not adhered are attached. The antibacterial gas can be generated from the sheet 3 by entering from the plate 2 to the back side of the sheet. Therefore, whichever surface of the sheet 3 is attached to the lid plate 2, the same antibacterial effect as described above can be exhibited.

5 to 7 show another embodiment. In this example, the lid plate 2 is made detachable from the housing case 1, and the inner sides of the lid plate 2 are adhered to the three sides of the sheet 3 containing the antibacterial agent, and the sheet 3 is not adhered. A pocket 9 for accommodating the eating utensil 4 is formed between the portion and the lid plate 2.

Further, the surface of the sheet 3 is provided with a large number of small holes 10 substantially uniformly over the entire surface thereof.
Minute projections 1 that surround each small hole 10 on one surface
1 is formed.

The formation of such small holes 10 and protrusions 11 is
As shown in FIG. 7, it can be performed by pushing a large number of heated hot needles 12 into the sheet 3. That is, by penetrating the hot needles 12, a large number of small holes 10 can be formed at the same time, and on the surface of the sheet 3 on the side where the hot needles penetrate, the melted material that has hardened around the small holes 10 due to the melting of the resin is formed. Since it rises, a crater-like minute projection 11 is formed.

In the lunch box of this embodiment, the sheet 3 is attached to the inner surface of the lid plate 2 with the surface on which the projection 11 is formed facing the food side, and the eating utensil 4 is stored in the pocket 9 on the back side of the sheet 3. The cover plate 2 is used by covering the housing case 1.

In this state of use, moisture and antibacterial gas freely flow between the front and back surfaces of the sheet 3 through the large number of small holes 10 of the sheet 3, so that the entire interior of the lunch box is made to have an antibacterial atmosphere. Therefore, the surface of the food A or the eating utensil 4 can be uniformly exerted with an antibacterial action.

Further, as shown in FIG. 6, in order to prevent the large number of protrusions 11 formed on the surface of the sheet 3 from contacting the food A and contacting the surface of the sheet 3 with the food A in a wide area, Can be prevented from adhering to the sheet.

In the above embodiment, an example in which the antibacterial agent is adhered to the resin film 6 by coating or printing is shown. However, the antibacterial agent is mixed with a resin material such as polyethylene or polypropylene and kneaded. Alternatively, the kneaded raw material may be formed into a film so that the antibacterial preparation is uniformly contained in the entire sheet 3.

[0031]

[Effect] As described above, according to the present invention, antibacterial gas is generated from the sheet by the action of moisture of food or the like, and the inside of the lunch box is made to have an antibacterial atmosphere. It is possible to exert an antibacterial effect on the whole of, and it is possible to surely suppress the generation of bacteria and mold inside the lunch box.

Further, most of the surface of the sheet and the inner surface of the lunch box are made non-adhesive so that moisture and antibacterial gas can flow between the front and back surfaces of the sheet, regardless of the insertion direction of the surface of the sheet. The same antibacterial effect can be obtained, workability at the time of manufacturing a lunch box can be improved, and stable antibacterial performance can be exhibited.

[Brief description of drawings]

FIG. 1 is a perspective view showing a lunch box according to an embodiment.

FIG. 2 is a perspective view showing a state in which the eating utensil is inserted into the inner surface of the lid plate.

FIG. 3 is a sectional view showing the internal structure of the seat.

4 (a) and (b) are diagrams schematically showing the antibacterial action of the lunch box of the same.

FIG. 5 is a perspective view showing another embodiment.

FIG. 6 is an enlarged view showing a sectional shape of a seat.

FIG. 7 is a cross-sectional view showing a method of forming small holes in the above sheet.

[Explanation of symbols]

 1 Storage case 2 Lid plate 3 Sheet containing antibacterial agent 4 Meal utensil 5 Gap 6 Film 7 Antibacterial agent layer 8 Paraffin coat 9 Pocket 10 Small hole 11 Protrusion 12 Hot needle A Food

Claims (3)

[Claims] 1. A flexible sheet is made to adhere or contain an antibacterial agent that generates an antibacterial gas by the action of moisture, and a part of the sheet is adhered to the inner surface of a lunch box, and most of the surface of the sheet is A lunch box formed along the inner surface of the lunch box in a non-bonded state. 2. A pocket-shaped space for inserting a eating utensil is formed between the central portion of the sheet and the lid by bonding both side edges of the sheet to the inner surface of the lid of the lunch box. Lunch box described. 3. A large number of small holes are formed substantially uniformly on the entire surface of the sheet, and at least one surface of the sheet is provided with
3. A minute protrusion provided around each small hole.
Lunch box described in.