JP2005263319A - Cooking container for microwave oven, wrapping body and partially non-heating cooking method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooking container and a wrapping body in which vertically stacked different contents are selectively heated by a microwave oven, and also to provide a partially non-heating cooking method using the same. <P>SOLUTION: The cooking container comprises a microwave shielding container body 10, a microwave permeable inner pan 20, and a microwave permeable lid 30. The inner pan 20 which stores a content to be heated is fitted and supported near an opening of the container body 10 that stores a non-heating content, and the inner pan 20 is covered with the lid 30 along its outer periphery to form the wrapping body. When the wrapping body is loaded in the microwave oven and heated, only the content in the inner pan 20 is heated and the content in the container body 10 is not heated. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cooking container and a package that can be partially heated by a microwave oven, and a partial non-heating cooking method using the same.

A container for partially heating a container containing food has been used for some time, and many proposals have been made to partially heat, for example, a disposable lunch box formed with a synthetic resin sheet. As an example, Patent Document 1 covers a non-heated portion with an aluminum foil to shield microwaves, and allows other portions to transmit microwaves so that they can be partially heated. However, in such a technique, there is a problem that it takes time and effort to cover the non-heated portion with an aluminum foil each time. As a technique close to this, Patent Document 2 discloses a lunch box in which an electromagnetic shielding material formed in advance on a non-heated portion is disclosed, but this also has a problem of increasing the cost.
JP-A-11-299524 (paragraph 0005, FIG. 1 and FIG. 3) JP 2000-355376 A (paragraphs 0007 and 0008, FIGS. 1 to 4)

  In any of the above-described techniques, only the section partitioned in a plane is only heated or not heated. However, if it is possible to completely change the way of thinking and partially heat the contents overlapped in the vertical direction, it is expected that new applications can be developed.

  Accordingly, an object of the present invention is to provide a cooking container, a packaging body, and a partial non-heating cooking method that can selectively heat different contents overlapped in the vertical direction in a microwave oven.

  In order to solve the above problems, in the present invention, a microwave shielding container main body having a bottom wall and a peripheral wall rising from the peripheral edge thereof, and a microwave permeable intermediate dish, the inner dish is an opening of the container main body. It was designed to be supported in the vicinity. Conversely, the container body may be formed of a microwave permeable material, and the inner dish may be formed of a microwave shielding material.

  In the microwave shielding container body, the height H from the bottom wall to the opening of the container body is preferably 30 mm or more, and the maximum diameter W of the opening of the container body and the height H from the bottom wall to the opening. Is preferably H> (1/2) W. Moreover, it is preferable to cover the outer surface of the container body with a microwave permeable outer container.

  The microwave permeable intermediate dish is composed of a storage part for storing the contents to be heated, and a concave line that engages with the container body, and the storage part serves as a container body opening part. When engaged, the container is located above the opening of the container main body, and the storage part is composed of a bottom wall and a peripheral wall rising from the periphery thereof, and one or more openings are provided in the bottom wall, or the storage part is It consists of a wall and a peripheral wall that hangs down from the periphery thereof, and the lower end of the storage part is preferably open. Moreover, it is good to seal this opening with the film in which the small hole was provided. Furthermore, it is preferable to provide a microwave-permeable lid that covers the inner dish.

  The non-heated contents are stored in the microwave shielding container body, and the contents to be heated are stored in the microwave-permeable inner pan to form a package. In this case, the distance between the non-heated content and the content to be heated is preferably 10 mm or more, and the content to be heated is preferably located in the center of the inner plate in plan view. The area of the content to be viewed in plan view should be 20% or more of the opening area of the inner dish.

  When the contents are respectively stored in the container body and the inner dish as described above, and loaded into a microwave oven and heated, any of the contents is partially cooked in an unheated state.

  By covering the outer surface of the container body with a microwave permeable outer container, heat can be prevented from conducting from the outside to the inside of the container body, and the container body can be prevented from sparking in the microwave oven.

  By positioning the storage part of the middle dish above the opening of the container body, the contents to be heated in the middle dish are more likely to absorb microwaves, and the unheated contents of the container body and the heating of the middle dish Since the distance from the content to be heated can be increased, the heat of the content to be heated can be prevented from being transmitted to the non-heated content as much as possible. As a result, the contents to be heated are more easily heated, and the non-heated contents are less likely to be heated.

By forming the storage portion from the top wall and the peripheral wall depending from the peripheral edge, the filling operation can be easily performed when the storage portion is filled with the contents. Furthermore, when the contents of the inner dish are fluidized by heating, it is possible to flow down to the non-heated contents of the container body at a stroke due to the effect of surface tension.

  By sealing the opening of the intermediate dish storage portion with a film provided with a small hole, it is possible to prevent the stored contents of the intermediate dish from being heated or falling to the container body during heating. In addition, by adjusting the number and size of the small holes, it is possible to control the amount and speed of the container body to flow down to the non-heated contents when the contents of the inner dish are fluidized by heating. .

  Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the cooking container of the present invention includes a container main body 10, a container inner tray 20, a lid 30, and an outer container 40.

The container body 10 is made of a microwave shielding material, for example, a single metal foil such as aluminum or a laminated body, a synthetic resin sheet provided with a metal vapor deposition film, and the like, and has a bottom wall 11 and a peripheral wall 12 rising from the periphery thereof, A shoulder 13 projects from the upper end of the peripheral wall 12, and an edge winding 15 is provided at the upper end of the side rim 14 of the shoulder 13.

  The inner tray 20 is made of a microwave permeable material, for example, a synthetic resin sheet, and has a bottom wall 21 and a peripheral wall 22 rising from the peripheral edge thereof, and a step portion corresponding to the shoulder 13 is formed at the upper end of the peripheral wall 22. 23 is provided, and on the outer periphery of the step portion 23, a recess 24 corresponding to the side rim 14 is provided. A recess 21 a is provided at the center of the bottom wall 21.

  The lid 30 is made of a microwave transparent material, for example, a synthetic resin sheet, and a skirt portion 34 is provided on the outer periphery of the lower end of the dome-shaped top wall 31, and the inside is hollow.

  The outer container 40 is made of a microwave permeable material, such as paper, and has a bottom wall 41 and a peripheral wall 42 rising from the periphery thereof, and a flange 43 is provided on the upper end of the peripheral wall 42. The outer container 40 and the container body 10 are joined or fitted with an adhesive or the like.

  In FIG. 2, the coupling | bonding state of the said container main body 10, the inner tray 20, the lid | cover 30, and the outer container 40 is shown. First, the inner tray 20 is engaged with the opening of the container body 10. That is, the bottom wall 21 is dropped into the container main body 10 until the step portion 23 of the intermediate dish 20 is pressed against the shoulder 13 of the container main body 10, and the concave strip 24 of the intermediate dish 20 is connected to the side rim 14 of the container main body 10. Engage the outside of the edge winding 15. When the lid 30 is covered in this state, the inner surface of the skirt portion 34 of the lid 30 is press-engaged with the outer side of the concave strip 24 of the inner tray 20 so that the lid 30 is locked. The upper surface of the flange 43 of the outer container 40 is in contact with the lower surface of the shoulder portion 13 of the container body 10. Instead of the lid 30, for example, a synthetic resin film may be covered and packaged, or the lid 30 and the synthetic resin film may be omitted. Of course, in the state of FIG. 2, the container main body 10 and the inner tray 20 contain appropriate contents, that is, the non-heated article in the former and the heated article in the latter.

In addition, as shown in FIG. 3 (a), the intermediate dish 20 is replaced with the bottom wall 21, the peripheral wall 22 rising from the periphery thereof, the bottom raising wall 27 depending from the upper end of the peripheral wall 22, and the lower end of the bottom rising wall 27. It is also possible to use a structure comprising a step portion 23 provided continuously with the skirt portion 24a and a skirt portion 24a provided continuously with the periphery of the step portion. In this case, an opening 25 is formed in the bottom wall 21 as necessary. The skirt portion 24a and the step portion 23 of the middle tray 20 correspond to the rim 14 and the edge winding 15 of the container body 10, and the container body 10 and the middle tray 20 are externally fitted. By forming the inner tray 20 in this way, the storage portion composed of the bottom wall 21 and the peripheral wall 22 is raised by the bottom raising wall 27 and is positioned above the opening of the container body 10.

Further, as shown in FIG. 3 (b), the top wall 28, the peripheral wall 22 depending from the peripheral edge thereof, the bottom raised wall 27 rising from the lower end of the peripheral wall 22, the step 23 connected to the lower end of the bottom raised wall 27, and the step You may use what consists of the skirt part 24a provided in the periphery. In other words, this is the same as lifting the bottom wall 21 in FIG. 3 (a) and forming the storage part upside down. The entire lower surface of the storage portion composed of the top wall 28 and the peripheral wall 22 is opened to form an opening 25, and the contents can be filled from below, so that the filling operation can be performed easily. Furthermore, when the contents of the inner dish 20 are fluidized by heating, it is possible to flow down to the non-heated contents of the container body 10 at a stretch due to the effect of surface tension.

  As shown in FIG. 4 (a), the contents heated and fluidized smoothly from the opening 25 provided in the central portion of the bottom wall 21 of the middle dish 20 to the predetermined location of the container body 10 A funnel-shaped guide 26 may be provided. It is preferable that the peripheral wall of the guide 26 has an inclination of 25 ° or more with respect to the horizontal plane, and is further curved in a spherical shape on the inner side. Further, as shown in FIG. 4B, the opening 25 can be provided on almost the entire surface of the inner tray 20. As shown in FIG. 4C, even when the bottom raising wall 27 is provided, the opening 25 can be provided on almost the entire surface of the inner dish 20 in the same manner. Further, a plurality of openings 25 may be provided.

  When the opening 25 is provided as shown in FIGS. 4 (a), (b), and (c), or when the lower surface is opened as shown in FIG. 3 (b), the opening 25 is formed as shown in FIG. You may seal with the film 50 in which the small hole 51 was provided. If it does in this way, when filling the contents in the inner tray 20, there is no worry of accidentally dropping it into the container body. In addition, when the heated and fluidized contents of the inner tray 20 are fluidized to the container body 10, the amount and speed of fluidization are controlled by adjusting the size, shape, number, etc. of the small holes 51. be able to.

In FIGS. 2 and 4, the recess 24 is provided around the upper opening of the inner tray 20, but is not limited to this as long as it can be engaged with or near the opening of the container body 10. However, it may be a flange having another cross-sectional shape (for example, an inverted J shape or an inverted L shape).

  As shown in FIG. 6, the peripheral wall 12 of the container body 10 may have two different inclination angles. In this case, it is preferable that the upper inclination angle with respect to the bottom wall 11 is made gentler (smaller) than the lower inclination angle.

  The shape of the container main body 10 and the inner tray 20 is generally a flat circular shape, but is not limited thereto, and may be a flat elliptical shape or a polygonal shape. Further, the depth of the container body 10 is preferably about 30 mm or more, and it is sufficient that the depth is about ½ or more of the maximum diameter of the opening.

  The contents stored in the container main body 10 and the inner dish 20 can be variously selected. For example, ice cream is stored in the container main body 10, and an article (solid chocolate or the like) melted by heating is stored in the inner dish 20, and the microwave oven is used. When heated, you can eat hot chocolate and cold ice cream at the same time. Moreover, when the compote is placed on the solid chocolate and stored in the middle dish 20 having the opening 25, the ice cream is stored in the container body 10 and heated in the microwave, the compote is dropped along with the warm chocolate on the ice cream. be able to. In such a case, the non-heated contents and the contents to be heated should be separated from each other by about 10 mm or more. The contents to be heated should be positioned at least in the center of the dish in plan view, and the area in plan view of the contents to be heated should be 20% or more of the opening area of the dish. Is good.

  As described above, when the non-heated contents are stored in the microwave shielding container main body 10 and the contents to be heated are stored in the microwave permeable inner dish 20 to form a package, The microwaves from the direction of the bottom wall 11 and the peripheral wall 12 are shielded by the container body 10, and the microwaves from the direction of the opening are stored in the container body 10 because the contents to be heated located in the inner dish 20 are absorbed. Microwaves do not substantially reach the non-heated contents, and heating can be prevented.

In particular, when the bottom raising wall 27 is provided as shown in FIG. 3, the contents to be heated of the inner dish 20 are further reduced by positioning the storage part of the inner dish 20 above the opening of the container body 10. Since it becomes easy to absorb waves and the distance between the non-heated contents of the container body 10 and the contents to be heated of the inner dish 20 can be separated, the heat of the contents to be heated is not heated. Can be prevented as much as possible. As a result, the contents to be heated are more easily heated, and the non-heated contents are less likely to be heated.

  Further, as shown in FIG. 1, when the outer surface of the microwave shielding container body 10 is covered with a microwave permeable outer container 40 made of plastic, paper, etc., such a microwave permeable material is heated. Since the conductivity is low, it is possible to prevent the unheated contents from being directly heated by heat transmitted from the outside, and it is also possible to prevent the container body 10 from sparking in the microwave oven.

  In the above embodiment, the middle dish 20 is a heating part and the container body 10 is a non-heating part. However, the middle dish 20 is formed of a microwave shielding material to be a non-heating part, and the container body 10 is microwave permeable. It can also be made of a material to form a heating part. In this case, for example, like sea urchin rice bowl or tuna rice bowl, it can be applied to the contents in which the ingredients are stored in the inner plate and the cooked rice is stored in the container body, and only the cooked rice is heated.

  Hereinafter, more detailed examples will be given. A microwave oven (Sanyo, EMO-FR20, 100V) is loaded using a flat circular aluminum foil container main body 10 and a polypropylene inner tray 20 shown in FIGS. And heated.

  In Example 1 and Example 2, 10 g of solid chocolate C is filled in the middle dish 20 as shown in FIGS. 9 and 10, respectively, the container body 10 is filled with 100 g of water, and the middle dish 20 is filled with the container body. 10 openings were engaged (see FIG. 2) and heated in a microwave for 60 seconds. As a result, in both Examples 1 and 2, the chocolate melted. In Example 1, the maximum temperature was 91.5 ° C., the minimum temperature was 58.0 ° C., and in Example 2, the maximum temperature was 94.5 ° C. and the minimum temperature was 79. It becomes 0 ° C., and it can be seen that the heating effect is improved by placing the article to be heated in a convex spherical shape at the center of the inner tray 20 as shown in FIG. In addition, all the temperature rises of the water in the container main body 10 were 4.5 degreeC.

  Next, as Example 3, a polypropylene middle dish 20 provided with a guide 26 at the opening at the center as shown in FIG. 11 was prepared, 10 g of solid chocolate C was filled as shown, and 100 g of ice cream was filled. The container body 10 (same as in FIG. 7) was engaged with the opening and heated in a microwave oven. After about 47.5 seconds, most of the chocolate flowed over the ice cream, but no ice cream melting was seen.

  In Example 4 and Example 5, 30 g of water is filled in the middle plate 20 shown in FIGS. 8 and 12, 100 g is filled in the container body 10, and the middle plate 20 is engaged with the opening of the container body 10. (See FIG. 2). Heated in a microwave for 60 seconds. As a result, in Example 4, the water temperature of the middle dish rises by 73.5 ° C., whereas in Example 5, the water temperature of the middle dish only rises by 58 ° C., and the middle dish as shown in FIG. It turns out that efficiency is good.

Exploded longitudinal sectional view showing an example of the cooking container of the present invention Partially enlarged vertical sectional view showing the combined state of the cooking container Longitudinal sectional view showing another example of a middle dish Longitudinal sectional view showing still another example of the middle dish A plan view showing an example of a film for sealing an inner dish Longitudinal sectional view showing another example of container body The longitudinal cross-sectional view which shows the container main body of an Example Longitudinal sectional view showing the middle dish of Examples 1, 2, 5 The longitudinal cross-sectional view which shows the filling state of the contents of Example 1 The longitudinal cross-sectional view which shows the filling state of the content of Example 2 The longitudinal cross-sectional view which shows the inner plate of Example 3 Sectional drawing which shows the pan in Example 4

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Container main body 11 Bottom wall 12 Perimeter wall 13 Shoulder part 14 Side rim 15 Edge winding 20 Middle dish 21 Bottom wall 21a Recess 22 Perimeter wall 23 Step part 24 Concave 24a Skirt part 25 Opening 26 Guide 27 Bottom raising wall 28 Top wall 30 Lid 31 Top wall 34 Skirt part 40 Outer container 41 Bottom wall 42 Perimeter wall 43 Flange 50 Film 51 Small hole

Claims (15)

  A microwave cooking container comprising a microwave shielding container main body having a bottom wall and a peripheral wall rising from the peripheral edge thereof, and a microwave permeable inner dish, wherein the inner dish is supported in the vicinity of the opening of the container main body.   A microwave cooking container comprising a microwave permeable container main body having a bottom wall and a peripheral wall rising from a peripheral edge thereof, and a microwave shielding middle dish, wherein the middle dish is supported in the vicinity of the opening of the container main body.   The container for microwave oven cooking according to claim 1, wherein the height from the bottom wall of the container body to the opening is 30 mm or more.   The container for microwave oven cooking according to claim 1 or 3, wherein the relationship between the maximum diameter W of the opening of the container body and the height H from the bottom wall to the opening is H> (1/2) W.   The container for microwave oven cooking in any one of Claim 1, 3, and 4 which covered the microwave permeable outer container on the said container main body outer surface.   The container for microwave oven cooking according to any one of claims 1, 3, 4, and 5, wherein the inner dish includes a storage portion for storing the contents to be heated, and a recess that engages with the container body. .   The container for microwave oven cooking according to claim 6, wherein the storage portion is positioned above the container body opening when the inner plate is engaged with the container body opening.   The said storage part is a container for microwave oven cooking of Claim 6 or 7 which consists of the surrounding wall which stands | starts up from the bottom wall and its periphery, and the one or more opening was provided in the said bottom wall.   The microwave oven cooking container according to claim 6 or 7, wherein the storage portion is composed of a top wall and a peripheral wall depending from the periphery thereof, and a lower end of the storage portion is opened.   The container for microwave oven cooking according to claim 8 or 9, wherein the opening is sealed with a film provided with a small hole.   The container for microwave oven cooking in any one of Claims 1-10 provided with the microwave-permeable cover which covers the said inside dish.   The package body using the container for microwave oven cooking in any one of Claim 1, 3-11 which stored the content which should be heated in the said container main body, and the content which should be heated was stored in the said inside dish.   The package according to claim 12, wherein a distance between the non-heated contents and the contents to be heated is 10 mm or more.   The content to be heated is located at least in a central portion of the middle dish in plan view, and the area of the content to be heated in plan view is 20% or more of the opening area of the middle dish. The package according to 13.   The partial non-heating cooking method by the microwave oven which stores the content in the container for microwave cooking in any one of Claims 1-14, or a package, and is loaded into a microwave oven and heated.

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