JPH01250210A - Container cover for high frequency heating cooker and container with its cover - Google Patents

Abstract

PURPOSE:To avoid the boiling off of contents resulting from a partial superheated steam by forming a micro wave interrupting part capable of interrupting the irradiated microwave in the fitting part of a cover main body and a container. CONSTITUTION:A cover body 1 has a flange part 7 obtained by extending the limb part of the opening end of a cover main body 3 and integrally forming with the cover main body 3 and a flange part 5A abutting against the flange part 7 is formed in the limb of the opening of a container 5. A microwave interrupting layer 9 (microwave interrupting part) composed of a metal material such as aluminium is arranged on the front surface of the flange part 7 and covers substantially all over the surface of the fitting part 7A of the flange part 7. Since the microwave interrupting layer 7 is integrally formed with the flange part 7 on the surface side of the flange part 7, a partial superheat at a part P where the flange part 7 abuts against the flange part 5A is avoided to prevent an inconvenience such as the boiling off of contents such as stew contained in the container 5.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a high-frequency cooking device suitable for heating contents such as food contained in a container using a high-frequency cooking device such as a microwave oven. The present invention relates to a container lid and a container having the lid.

[Conventional technology]

In recent years, many products have appeared on the market that allow consumers to easily prepare various dishes by simply filling the desired container with cooked contents and heating the container in a high-frequency cooking device such as a microwave oven. It's coming.

FIG. 8 shows a high-frequency cooking device container 5 and its lid 1 used for such products.
A flange portion 7 is formed extending along the periphery of the lid body 3, and a fitting portion 7A that can be fitted into the inside of the container 5 is integrally formed in the flange portion 7.

That is, when the opening of the container 5 is closed with the lid 1, the fitting part 7A is fitted inside the container 5, as can be understood from FIG. Efforts have been made to preserve the contents and extend the shelf life of the contents.

By the way, when heating the contents in the container 5 with a microwave oven, the contents are not necessarily heated uniformly as a whole, resulting in so-called non-uniform heating.

As a result, partial overheating occurs in which a part of the contents is heated abnormally, and the partial overheating occurs in the area indicated by arrow P in FIG. It is likely to occur in

The reason for this is that when the contents contain a liquid, such as stew, the liquid will seep into the P part. Therefore, if the lid 1 is heated with the lid 1 attached to the container 5, However, a small amount of liquid is rapidly overheated and the pressure increases, resulting in loosening of the fitting and boiling over due to partial heat conduction, which contaminates the lid 1, container 5, or the inside of the microwave oven, and also causes damage to the container. There is a disadvantage that the appearance of the 5th grade is impaired.

Therefore, Japanese Patent Application Laid-Open Nos. 57-12227 and 1986-12227,
As shown in Publication No. 135615, etc., a microwave blocking layer is provided on the entire lid 1 to avoid partial overheating,
Or JP-A-61-141330, JP-A-61
As shown in Japanese Patent Application No. 141331, etc., there is a known method in which partial overheating is avoided by providing a microwave blocking layer on the upper edge of the side wall of the double container or on the side wall hanging portion of the outer container.

[Problem to be solved by the invention]

However, in a structure in which the microwave blocking layer is provided over the entire lid, the microwave blocking layer is generally made of metal foil, so the lid becomes opaque.1. There is a problem in that it is not possible to see what the contents are from the outside, so the value as a product is low.

On the other hand, with a structure in which a microwave blocking layer is provided on the side wall of the outer container, it is difficult to process the lid l, which poses problems in terms of production workability and cost.
In a lid L shown in the figure that fits inside the container 5, if a liquid such as stew seeps into the P part, local heat generation occurs in that part. strength(
, it is difficult to effectively avoid partial overheating.

An object of the present invention is to provide a container lid for a high-frequency heating cooker, which avoids partial heating without reducing the heating efficiency of the contents, and reliably prevents the contents from boiling over from the container during heating, and the lid. The objective is to provide a container with

[Means to solve the problem]

In order to achieve the above object, the high-frequency cooking device container lid according to the present invention includes a lid main body capable of closing an opening of the high-frequency heating cooking device container, and a lid body that corresponds to the shape and size of the opening. It has a fitting part formed in a shape and size that can fit inside the container, and a flange part formed to extend along the periphery of the lid main body, and at least the fitting part is irradiated. In the present invention, the microwave blocking section is configured to be able to block the microwaves that are generated, and the microwave blocking section is formed by partially vapor depositing, printing, etc. the microwave blocking section made of aluminum or the like. The sheet-like material may be formed as a whole with the lid body by press molding or the like, or it may be formed as a separate annular body and placed at a desired position on the lid body.

Moreover, the container having the container lid for a high-frequency heating cooker according to the present invention includes: a container main body for a high-frequency heating cooker; a lid main body capable of closing an opening of the container main body; a shape of the opening of the container main body; a flange portion extending along the periphery of the lid body and having a fitting portion formed in a shape and size corresponding to each size and capable of fitting inside the container body; It is characterized by having a microwave blocking part capable of blocking microwaves irradiated to the fitting part.

(Function) In the container lid for a high-frequency cooking device and the container having the lid according to the present invention, at least the microwave irradiated to the fitting portion is blocked by the microwave blocking portion.
When heating the contents of a container in a microwave oven or the like, boiling over of the contents due to partial heating can be avoided.

(Embodiments) Hereinafter, preferred embodiments of a container lid for a high-frequency cooking device and a container having the lid according to the present invention will be described based on the drawings.

First, a first example will be described.

In FIG. 1, the lid l has a flange portion 7 formed integrally with the lid body 3 by extending the peripheral edge of the opening end of the lid body 3, and the flange portion 7 starts to extend. As can be seen from FIG. 2, the cross section is bent in a box-o shape, and the bent portion forms a fitting portion 7A that is fitted into the inside of the container 5.

On the other hand, a flange portion 5A that comes into contact with the flange portion 7 is formed at the periphery of the opening end of the container 5, and as understood from FIG. 2, when the lid body 1 is attached to the container 5, The fitting part 7A is fitted inside the container 3, and the flange part 7 and the flange part 5A are brought into contact with each other, so that the airtightness inside the container 5 is maintained.

The material for the lid 1 is preferably a heat-resistant transparent material, and polypropylene, polyester, nylon, or the like is suitable.

On the other hand, the material for the container 5 is not particularly limited, but polyethylene terephthalate, polypropylene, polyolefin containing 10 to 70% by weight of an inorganic filler, and the like are suitable.

Here, a microwave blocking layer 9 (microwave blocking section) made of a metal material such as aluminum is provided on the front surface of the flange portion 7, and the microwave blocking layer 9 is shown in FIGS. As can be understood from FIG. 3, which is an enlarged view of part A, almost the entire surface of the flange portion 7 and the fitting portion 7 is covered. It should be noted that a configuration in which only the fitting portion 7A portion is covered may be used.

In this embodiment, the microwave blocking layer 9 is integrated with the flange portion 7, and the means for integrating the layer 9 is to attach the microwave blocking layer 9 to the flange portion 7 before vacuum-pressure forming or press forming the lid l from a sheet-like material. Microwave blocking layer 9 on the corresponding part
Preferable methods include vapor deposition, printing, pasting aluminum foil, and partial vapor deposition of aluminum after molding.

As explained above, in this embodiment, since the microwave blocking layer 9 is provided integrally with the flange part 7 on the front side of the flange part 7, the microwave shielding layer 9 is provided integrally with the flange part 7 on the front side of the flange part 7. Partial heating is avoided, so that container 5
There is no inconvenience such as the contents such as stew contained therein boiling over to the outside of the container 5.

Since the microwave blocking layer 9 hardly covers the main part of the lid 1, that is, the lid body 3, the container 5
Good heating efficiency is maintained even when the contents are heated with the lid 1 attached to the container.

Furthermore, since the lid body 3 is made of a transparent material, the food inside the container 5 can be seen through during display at a store or during heating, etc., making it extremely convenient to use.

In addition, since the microwave blocking layer 9 is integrated in advance with the sheet material from which the lid 1 is formed by vacuum-pressure forming or the like, the container 5 has a special shape, and the lid 1 has a special shape corresponding to the container 5. Even if the microwave blocking layer 9
Since the lid body l having the above structure is easily formed, the production efficiency is extremely high and the production cost can be reduced.

Next, a second embodiment of the present invention will be described.

FIG. 4 shows an embodiment in which the microwave shield l1i9 is formed separately from the lid l.

In the figure, the microwave blocking layer 9 has a flange portion 5A.
The structure is such that microphone A-waves, which cause partial overheating, can be blocked simply by placing it on the front side of the horizontal edge 7B of the flange part 7 that comes into contact with the flange part 7.

That is, as can be understood from FIG. 5, the microwave blocking layer 9 is made by pasting a paper 12 on the back side of an aluminum foil 10 and is integrated with the aluminum foil 10, and is formed in an annular shape. The outer peripheral edge 9A of the microwave blocking layer 9 is the horizontal edge 7B.
The shape and size correspond to the edge of the
In addition, the inner circumferential edge 9B of the microwave blocking layer 9 is set so as to come into contact with the outer circumferential side surface 3A of the lid body 3 (see FIG. 5).

As explained above, in this embodiment, the microwave blocking layer 9
Since the lid is provided separately, a conventional lid can be used, and the user can simply attach the microwave blocking layer 9 to the lid to avoid boiling over of the contents due to partial overheating. This improves convenience.

Also, depending on the shape of the lid body 1, etc., the microwave cutoff FI9
By providing various shapes, etc., a wide range of support is possible.

Using the microwave blocking layer 9 configured as described above, an experiment was conducted to determine the microwave blocking effect of the microwave blocking layer 9, that is, to what extent partial overheating can be avoided.

In that experiment, the lid l was made of transparent polypropylene, while the container 5 was made of polyethylene terephthalate.

Also, the width α of the horizontal edge 7B of the lid l and the radius β of the fitting part 7A
are both 51, and the depth hl of the lid 1 is 10.
On the other hand, the depth h2 of the container 5 was set to 25 mm, and the size of the opening was a rectangular shape of 800 mm to 1000 mm (see Figs. 5 and 6).

As can be seen from FIG. 6, a through hole 13 is formed at approximately the center of the lid body 3, and a seal If that closes the through hole 13 is removably formed on the outer surface of the lid body 3. It is pasted.

The through hole 13 is provided to prevent accidents such as damage to the container 5 due to the internal pressure inside the container 5 becoming too high during heating. There are two types: one that is peeled off immediately, and one that is peeled off before heating.

The content contained in the container 5 was beef stew, and the liquid had seeped into the portion P where the flange portion 7 and the flange portion 5A abutted.

In this state, the seal 11 was first peeled off and heated in a microwave oven. The heating was continued for 2 minutes at 500 watts of power.

As a result, when using the microwave blocking layer 9, the portion P
There was almost no change in the temperature, etc., and therefore no occurrence of boiling over due to partial overheating was observed.

On the other hand, in the case where the microwave blocking layer 9 is not used, partial overheating occurs in the portion P etc., and as a result, the beef stew spills out of the container 5.

Next, in the microwave blocking layer 9 shown in FIG. 7 showing a third embodiment of the present invention, the microwave blocking layer 9 is interposed between the horizontal edge 7B and the flange 5A, and the microwave blocking layer 9 is interposed between the horizontal edge 7B and the flange 5A. The layer 9 is formed in an annular shape corresponding to the shape and size of the opening of the container 5, and the fitting portion 7A of the lid l passes through the opening 9C of the microwave blocking layer 9 and is fitted into the inside of the container 5. will be combined.

The microwave blocking layer 9 may be simply placed on the flange portion 5A, or may be adhered and fixed to the flange portion 5A with an adhesive or the like.

As explained above, in this embodiment, the microwave blocking layer 9 is formed separately as in the second embodiment shown in FIG. 4, so that it has the same effect as the second embodiment.

In addition, since the microwave blocking layer 9 is sandwiched between the horizontal edge 7B and the flange 5A, the back side of the microwave blocking layer 9, that is, one side that contacts the flange 5A, is made of a suitable material. By integrally adhering the elastic sealing member, it has a special effect, such as being able to further improve the sealing performance inside the container 5.

In addition, when the microwave blocking layer 9 is formed separately from the lid body 1, it may be configured to have a multilayer structure of a metal such as aluminum foil that blocks microwaves and a resin, or a multilayer structure of the metal foil and paper, etc. In short, at least the microwave irradiated to the fitting portion 7A is blocked, and the shape is such that the entire portion comes into close contact with the horizontal edge 7B when placed on the horizontal edge 7B etc. It is sufficient that the rigidity is maintained.

〔Effect of the invention〕

As can be understood from the above explanation, since the container lid for a high-frequency cooking device and the container H having the lid according to the present invention have a microwave blocking portion, the portion where microwaves are likely to occur particularly at the fitting portion position. This does not cause heating, and as a result, the contents are reliably prevented from boiling over from inside the container during heating.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a preferred embodiment of a high-frequency cooking device container lid and a container having the lid according to the present invention;
The figures show the container lid attached to the container, a sectional view taken along the line ■-■ in FIG. 1, FIG. 3 an enlarged view of section A in FIG. 2, and FIG. FIG. 5 is a partial sectional view showing the state in which the microwave blocking layer of FIG. 4 is attached to the container lid, and FIG. 6 is a perspective view showing the microwave blocking layer of the second embodiment. In the tests conducted using the cut-off part, a cross-sectional view showing the lid attached to the container, Fig. 7 is a perspective view showing the microwave cut-off part etc. in the third embodiment, and Fig. 8 shows the conventional high-frequency A perspective view of a container lid for a heating cooker and a container in which the lid is used,
FIG. 9 shows a state in which the container lid of FIG. 8 is fitted to the container, and is a sectional view taken along the line IX-IX in FIG. 8. l... Lid body, 3... Lid body, 5... Container, 5A.
...Flange part, 7... Flange part, 7A... Fitting part, 9... Microwave blocking layer (microwave blocking part).

Claims (5)

[Claims] (1) A lid body capable of closing an opening of a container for a high-frequency heating cooker, and a lid body formed in a shape and size corresponding to the shape and size of the opening, and capable of fitting inside the container. a flange portion extending along the periphery of the lid main body, and a microwave blocking portion configured to be able to block at least microwaves irradiated to the fitting portion; A container lid for a high-frequency heating cooker, characterized by having the following. (2) The container lid for a high-frequency cooking device according to claim 1, wherein a desired part of the lid main body can be seen through. (3) The container lid for a high-frequency cooking device according to claim 1, wherein the microwave blocking portion is formed integrally with the lid main body. (4) The container lid for a high-frequency cooking device according to claim 1, wherein the microwave blocking portion is formed in an annular shape and is formed separately from the lid main body. (5) A container body for a high-frequency heating cooker, a lid body capable of closing an opening of the container body, and a lid body formed in a shape and size corresponding to the shape and size of the opening of the container body, respectively. It has a fitting part that can be fitted inside the container main body, and a flange part extending along the periphery of the lid main body, and a flange part that can block at least microwaves irradiated to the fitting part. A container for a high-frequency cooking device, characterized in that it has a microwave cutoff section.