JP2010215259A - Food packaging container for microwave oven cooking - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a cooking function by forming a steam exhaust channel which is opened and closed by the increase/decrease of steam pressure in the container body between a container body and a lid body by maintaining a sealing characteristic in storing a content and by maintaining the inside of the container body in a negatively pressured state by surely resealing after heating and cooking. <P>SOLUTION: This food packaging container comprises a container body 1 and a lid body 11 and a lid engagement part 14 formed at the lid body 11 is forcibly fitted in a container engagement part 4 formed at the container body 1. A steam exhaust mechanism 21 is provided for exhausting superheated steam to the outside of the body 1 by lifting the body 11 from the body 1 at the steam pressure of the superheated steam generated in the body 1. The mechanism 21 is formed with a stopper means 22 for making the container engaging part 4 engaged with the lid engaging part in a state that the part 14 fitted with the part is upwardly lifted and with a steam exhaust groove 27 which is closed when the part 4 and the part 14 mutually fit and is opened for making the inside of the body 1 communicate with the outside of the body 1 when the part is lifted. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention can smoothly discharge steam generated from the contents to the outside when the food packaging container itself, which is sealed and packaged after containing contents such as food and drink, is cooked as it is, for example, by a microwave oven. The present invention relates to an improvement of a food packaging container for a microwave oven that can further infiltrate a predetermined taste into a cooked product by cooking.

  Conventionally, food can be cooked in a microwave oven using a packaged food container that contains various cooked products, and steam generated from the cooked product is discharged outside the container. After cooking, the container is kept sealed again Various kinds of food packaging containers have been proposed. For example, Patent Literatures 1 to 8.

  In Patent Document 1, the opening of the top sheet that closes the opening of the container body is closed by a pressure adjustment valve, and the pressure adjustment valve is peeled off by the water vapor pressure generated during cooking by a microwave oven. There are a pressure regulating valve whose pressure is regulated, an automatic cooking package having an external pressure regulating valve, and a food and drink packaged with the automatic cooking package. Patent Document 2 discloses a packaging container in which a through-hole provided in a lid of a container body is closed with a band seal, and the through-hole communicates with the outside due to an increase in internal pressure during heating by a microwave oven. It is. Patent Document 3 discloses that a film fused between an annular convex portion arranged around a through-hole provided in a package and an upper edge of an opening outside the convex portion is bonded at the time of fusion. This is a packaging body in which a part of the adhesive portion of the film is broken by the pressure inside the packaging body due to the difference in force to provide an internal gas discharge path.

  Patent Document 4 makes it possible to fit the container body and the lid body, make the rising wall portion of the container body and the peripheral flange portion of the lid body intimately close, and float the intimate portion by the pressure of the internal steam. It is a food container for microwave ovens that allows steam to be discharged. In Patent Document 5, the skirt portion of the outer lid is provided in close contact with the opening flange portion of the container main body, the outer lid is lifted by the expansion air pressure generated by the steam generated in the container main body, and is opened by being held in contact with the stopper rib. This is an outer lid of a container in which water vapor is removed at the ridge groove of the skirt and the contents are not scattered without removing the outer lid. Patent Document 6 is a food container for a microwave oven that, when a lid body fitted to a container body is pushed up by air expanded during cooking, causes a recessed portion of the lid body to communicate inside and outside to discharge expanded air. . In Patent Document 7, a cap is provided on a lid that closes an opening of a container body, and internal air, steam is generated from between the cap and the lid by a lid vapor discharge groove formed at a fitting portion between the cap and the lid. It is a system container for microwave cooking that discharges.

  Further, in Patent Document 8, an opening serving as a passage is formed on the inclined surface formed at the upper edge of the food container body, and the passage is opened and the gas is opened in the first attached state where the lid is lifted with respect to the body. In the second attached state in which the lid is pushed toward the main body, the gas distribution is cut off, and the food container that enables cooking, cooking, and manufacturing, and the method of cooking the packed food using the food container It is.

  Thus, in Patent Documents 1 to 3, the seal member that closes the vapor vent hole provided in the container body is opened by forcibly peeling it with the vapor pressure or the like inside the container body to discharge the vapor or the like. I am doing so. In the case of such a vapor pressure peeling seal type, it is necessary to adjust and seal the adhesive strength of the seal corresponding to the vapor pressure inside the container body, that is, the adhesive strength to be peeled off at a vapor pressure of a certain level or more. The selection of the bonding method is troublesome.

  Further, in Patent Documents 4 to 7, the fitting part between the container body and the lid body fitted to the container body needs to be tightly sealed when vapor pressure or the like is not generated in the container body. Conversely, when steam pressure is generated during cooking or the like, the close contact state is dissociated to form a discharge path. In the case of such a pressure generation fitting dissociation type, the adhesion of the fitting part between the container body and the lid body must be sufficiently ensured, in order to achieve close contact with each other, even at the time of dissociation Since they are engaged with each other, each of them needs to be precisely formed.

  In Patent Document 8, since the lid body moves up and down relative to the main body in each of the first and second attachment states to open and close the passage, the main body and the lid body can be opened and closed in any attachment state. And the sliding movement along the vertical direction by the increase / decrease of the vapor pressure is performed smoothly, and the lid body must not be detached from the main body due to the increased vapor pressure.

JP-A-6-329179 JP 2000-344267 A Japanese Patent No. 3914137 JP 2004-35051 A JP 2001-80682 A Patent No. 3009863 JP 2004-305716 A JP 2006-315708 A

  In the present invention, the container body according to the present invention has been improved with respect to the conventional adhesive, heat adhesion, etc., and the need for troublesome labor such as precision molding of the fitting portion. Even if it is a package with a lid that fits in the opening of this, it is easy to manufacture, the vapor pressure generated in the package can be easily discharged while maintaining the engagement between the lid and the container body, and the electronic Make it even more delicious by cooking with a microwave oven. In this way, when the vapor pressure generated in the package increases to a certain level or higher, the lid is lifted while the container body is engaged and the steam is discharged. It is in close contact with the container main body at the opening of the main body and closing it again to promote cooking by steaming.

  That is, the present invention was created in view of the above points, and between the container body and the lid body that is fitted to cover the opening of the container body, the inside of the container body Superheated steam can be smoothly discharged to the outside by a steam vent groove that is opened while the container body and lid body are engaged at a steam pressure of a certain level or more. There is in going back. In addition, it is possible to maintain the airtightness at the time of selling and providing to customers when contents such as cooked goods are stored, and to ensure resealing after cooking with a microwave oven, and to maintain a negative pressure state in the container body An object of the present invention is to provide a food packaging container for a microwave oven that can maintain and enhance the cooking function.

In order to solve the above-described problem, in the present invention, the container body 1 that houses the cooked product F and the lid body 11 that covers the opening of the container body 1 are attached to the peripheral portion of the container body 1. A food packaging container that seals the container body 1 by forcibly fitting the lid fitting part 14 formed on the peripheral edge of the lid body 11 to the formed container fitting part 4, and overheating that occurs in the container body 1 A steam discharge mechanism 21 that lifts the lid 11 from the container main body 1 by the vapor pressure of the steam and discharges the superheated steam to the outside of the container main body 1 is provided, and the vapor discharge mechanism 21 is a lid that fits the container fitting portion 4. Stopper means 22 and 32 for locking the container fitting part 4 and the lid fitting part 14 together with the fitting part 14 lifted upward, closed when fitted, and inside the container body 1 when raised. Vapor vent groove 27 is formed to open the container body 1 outside. Characterized by comprising Te.
The steam release groove 27 is formed by recessing the upper edge portion of the container fitting portion 4 in the shape of a groove, or by continuing to the upper edge portion, the inner container inner fitting portion 5 wall, the outer container outer fitting portion 6. The wall can be formed in a groove shape.
The first stopper means 22 includes a container-side protrusion 23 bulged outwardly from the container outer fitting portion 6 of the container fitting portion 4 of the container main body 1 and a lid of the lid body 11. A lid-side indented portion 24 that is recessed inwardly in the lid 11 in the lid outer fitting portion 16 of the fitting portion 14 and engages with the container-side protrusion 23 when the lid 11 is raised and slid. It can be. The container-side protrusion 23 and the lid-side depression 24 are positioned one above the other along the fitting direction of the container main body 1 and the lid 11, and one is in the container fitting portion 4 or the lid fitting portion 14. At the upper edge, the other is located at the lower edge of the lid fitting portion 14 or the container fitting portion 4, and when the lid body 11 slides in the opening direction with respect to the container body 1, the lid-side depression at the lower edge position 24 or the container-side protrusion 23 can be engaged with the container-side protrusion 23 or the lid-side depression 24 at the upper edge position.
In the container outer protrusion part 23 and the lid recess part 24, respectively, the container outer fitting part 6 outer surface and the lid outer fitting part 16 upper surface or the lower part of the inner surface are bulged so as to be in close contact with the opposite side surface. At least one of the container-side bulging portion 25 and the lid-side bulging portion 26 to be formed can be formed.
The second stopper means 32 includes a container-side protrusion 33 bulged outwardly from the container body 1 at the upper edge portion of the container outer fitting portion 6 in the container fitting portion 4 of the container body 1. In the lid fitting portion 14 of the lid body 11, the lower edge portion of the lid outer fitting portion 16 is recessed inwardly of the lid body 11. The lid-side depression 34 and the container-side projection 33 have substantially the same width as that of the container-side projection 33, and bulge outwardly from the lid 11 to the lid outer fitting portion 16 above the lid-side depression 34. The guide groove portion 35 is continuous with the lid-side depression portion 34.
When the lid body 11 is raised and slid with respect to the container body 1, the lower edge of the lid inner fitting portion 15 is separated from the upper edge of the container inner fitting portion 5 and steam formed on the flat portion above the container fitting portion 4 At the same time that the inner opening of the container body 1 of the drain groove 27 is opened, the lower edge of the lid outer fitting portion 16 reaches the upper edge of the container outer fitting portion 6, and the lid outer fitting is performed from the outer opening of the container body 1 of the steam drain groove 27. The lower edge of the joint portion 16 can be configured to open to the outside.

In the food packaging container for a microwave oven according to the present invention configured as described above, the lid body 11 is connected to the container body 1 in which the cooked product F is stored, the container fitting portion 4 and the lid fitting portion 14. The container main body 1 is covered with the cooked product F sealed and packaged by fitting with each other. When, for example, seasoned water is contained in the container body 1 in this sealed packaging state and heated in a microwave oven, the steam generated in the container body 1 at the same time as heating the cooked product F cooks the cooked product F in a steamed state. In addition, when the steam pressure becomes a certain level or higher, the steam discharge mechanism 21 is opened, and thereby the superheated steam is discharged to the outside through the steam vent groove 27 that communicates the inside and outside of the container body 1.
The steam generated in the container main body 1 by heating by the microwave oven is steamed and cooked with respect to the accommodated cooked product F, and when the steam pressure exceeds a certain level, the lid 11 is lifted with respect to the container main body 1 and the steam is discharged. In the mechanism 21, the stopper means 22, 32 keeps the container body 1 and the lid body 11 engaged with each other, and the superheated steam in the container body 1 is released to the outside by the steam vent groove 27 that is opened and communicated inside and outside the container body 1. To discharge. By the discharge of the steam, the container body 1 and the lid body 11 are damaged or damaged due to the steam pressure, for example, excessive expansion of the lid body 11, separation / separation / detachment of the lid body 11, and the contents of the cooked food F Spouting and the like are prevented, and steaming cooking is completed after a predetermined time.
After cooking, the inside of the container body 1 and the lid body 11 is in a negative pressure state, and the steam release groove 27 is closed by the lid inner fitting portion 15 and the container inner fitting portion 5 in the inner and outer lid bodies 11. The inside of the container body 1 and the like is sealed by the inner wall fitting portion 15 wall and the outer lid fitting portion 16 wall which are in close contact with the inner fitting portion 5 wall and the container outer fitting portion 6 wall. Sealing in the negative pressure state further infiltrates seasoning water or the like into the cooked product F, and increases the deliciousness of the cooked product F.
In the steam discharge mechanism 21, the steam vent groove 27 formed in the formed container fitting portion 4 by being recessed in a groove shape facilitates steam discharge and enhances the discharge capability, and the stopper means 22 and 32 are generated in the container body 1. The lid 11 is not detached from the container body 1 even by the steam pressure, and a constant amount of steam pressure is maintained in the container body 1 to promote cooking of the food F, steam cooking, and the like.
Further, the fitting between the container fitting portion 4 and the lid fitting portion 14 is carried out by the respective container inner fitting portion 5 wall, lid inner fitting portion 15 wall and container outer fitting portion 6 wall, lid outer side. When the steam is not generated in the container main body 1 with the fitting portion 16 walls being in close contact with each other, or when the negative pressure state after cooking is closed, the inner and outer openings of the steam vent groove 27 are closed to block the inside and outside of the container main body 1. The container body 1 is sealed by shielding.
The container-side protrusions 23 and 33 and the lid-side depressions 24 and 34 in the stopper means 22 and 32 are respectively bulged or depressed on the opposite sides in the inner and outer directions of the container body 1, so that the lid with respect to the container body 1 is covered. When the body 11 is raised and slid, they are locked together to prevent the lid 11 from being detached from the container body 1.
In the first stopper means 22, any one of the container-side bulging portion 25 and the lid-side bulging portion 26 bulged so as to be in close contact with the opposite side surface at the container-side protrusion 23 and the lid-side depression 24 portion. Keeps the shielding property at the position of the stopper means 22 and prevents outside air intrusion and steam leakage.
In the second stopper means 32, the guide groove 35 bulged continuously from the lid-side depression 34 facilitates the ascending slide of the lid 11 itself with respect to the container body 1, and the container-side protrusion of the lid-side depression 34. The locking to the part 33 is ensured. Further, when the lid body 11 is raised, the lower edge of the lid inner fitting portion 15 is separated from the upper edge of the container inner fitting portion 5, and the lower edge of the lid outer fitting portion 16 is above the container outer fitting portion 6. By reaching the edge, the inner and outer openings of the steam vent groove 27 are opened, and the superheated steam in the container body 1 is discharged out of the container body 1.

  Since the present invention is configured as described above, when cooking in the microwave oven in a state in which the food product F is hermetically packaged by fitting the lid 11 to the container body 1, cooking by heating with the microwave oven and this Thus, the cooked product F can be steamed by the steam generated in the container body 1. Moreover, the superheated steam can be easily discharged to the outside by the steam discharge mechanism 21 while the lid 11 is covered on the container body 1, there is no damage to the container, and the container body is ensured to be resealed after cooking. The negative pressure state in 1 is also maintained, seasoning water or the like is further permeated into the cooked product F, and the cooking function can be further enhanced.

  Further, the steam discharge mechanism 21 is provided in the container fitting portion 4 and the lid fitting portion 14 formed on the peripheral edges of the container main body 1 and the lid body 11, so that the steam of superheated steam in the container main body 1 is provided. When the pressure is above a certain level, the steam vent groove 27 is opened to the outside of the container body 1, and it is not necessary to precisely form a steam discharge path that is opened and closed by increasing or decreasing the steam pressure inside the container body 1. The mechanism 21 can be easily formed. Not only that, it is possible to maintain the sealing property at stores such as sales and provision to customers when contents such as cooked food F are stored, and it is hygienic, and cooking with a microwave oven is possible with the packaging container itself. Since it is possible, it can be used and eaten easily.

  That is, this is because the present invention forcibly fits the opening of the container body 1 with the container fitting part 4 formed on the container body 1 and the lid fitting part 14 formed on the lid body 11. When the lid 11 is sealed with the lid 11, a steam discharge mechanism 21 is provided for lifting the lid 11 from the container body 1 with the steam pressure of the superheated steam of the container body 1 and discharging the superheated steam to the outside of the container body 1. The mechanism 21 is a stopper means that locks the container fitting part 4 and the lid fitting part 14 between the container fitting part 4 and the lid fitting part 14 in a state in which the lid fitting part 14 fitted to the container fitting part 4 is lifted upward. 22 and 32 are closed at the time of fitting, and at the time of lifting, it is composed of a steam vent groove 27 for opening the inside of the container main body 1 and the outside of the container main body 1 so that they remain closed. Cooking with a microwave oven, heating Discharge of the vapor pressure at the time management, further allows for cooking such as steaming by resealing after discharge, also than attained also maintain sealing of the time of sale.

  The steam vent groove 27 of the steam discharge mechanism 21 is formed in a groove shape on the upper edge portion of the container fitting portion 4, and further on the inner container inner fitting portion 5 wall and the outer container outer fitting portion 6 wall. Therefore, when the lid 11 is lifted from the container body 1 by the steam pressure of the superheated steam generated in the container body 1, the opening of the steam vent groove 27 inside and outside the container fitting portion 4 is formed. The lid inner fitting portion 15 and the lid outer fitting portion 16 of the lid fitting portion 14 are released by moving upward. By opening the inner and outer openings of the steam vent groove 27 in this way, the inside and outside of the container body 1 can communicate with each other, the steam of superheated steam generated in the container body 1 can be discharged, and the container itself is destroyed by discharging excess superheated steam. Cooking can be continued without any problems. Further, after the excess superheated steam is discharged, the lid fitting portion 14 is returned to the original position and fitted to the container fitting portion 4 in combination with a temporary negative pressure state generated in the container body 1. When the steam pressure of the superheated steam is increased again in the container body 1, the steam vent groove 27 is opened again to discharge excess steam pressure, and the cooking is continued by repeating these.

  The first stopper means 22 in the steam discharge mechanism 21 includes a container-side protrusion 23 bulged outwardly from the container outer fitting portion 6 of the container fitting portion 4 and a lid fitting portion. 14 includes a lid-side recess portion 24 that is recessed inwardly into the lid body 11 in the lid outer fitting portion 16 and is engaged with the container-side protrusion 23 when the lid body 11 is lifted and sliding. Even when the lid body 11 is lifted and slides when the vapor pressure of the superheated steam in the container 1 exceeds a certain level, the lid body 11 is not separated from or detached from the container body 1 and the container fitting portion 4 and the lid fitting portion 14 are removed. Even if it is slight, these fitting states are maintained. Therefore, when the steam pressure is reduced by the discharge of the superheated steam in the container body 1, the container fitting portion 4 and the lid fitting portion 14 are fitted again, and the container body 1 is sealed.

  In addition, the container outer protrusion portion 6 and the lid outer recess portion 24 at the container outer protrusion 23 and the lid outer depression 24 are respectively in close contact with the opposite side surface at the upper portion or the lower portion of the inner surface of the lid outer fitting portion 16. Since at least one of the bulging container-side bulging portion 25 and the lid-side bulging portion 26 is formed, the container-side protrusion 23 and the lid-side depression 24 in the first stopper means 22 are respectively above. Even in the part and the lower part, the hermetic fitting between the container fitting part 4 and the lid fitting part 14 can be maintained, and the inside and outside of the container body 1 can be reliably shut off and shielded when the container is hermetically closed.

  Furthermore, the second stopper means 32 in the steam discharge mechanism 21 includes a container-side protrusion 33 bulging outwardly from the container body 1 at the upper edge portion of the container outer fitting portion 6 of the container fitting portion 4. The lid outer fitting portion 16 of the lid fitting portion 14 is recessed inwardly at the lower edge portion of the lid body 11 so that the upper surface engages the lower surface of the container-side protrusion 33 when the lid body 11 is raised. The lid side depression 34 and the width of the container side projection 33 are set to be substantially the same width, and the lid outer depression portion 34 is bulged outwardly from the lid body 11 above the lid side depression 34 so as to protrude outward from the lid 11. Since it is composed of a guide groove portion 35 continuous with the recess portion 34, even if the lid body 11 rises in the case of a large size due to the inside / outside of the steam pressure of the superheated steam in the container body 1, even if the lid body 11 rises, Detachment from the container body 1 is prevented and superheated steam is discharged. It closed in a sealed state, to open and close the venting groove 27 in the magnitude of superheated steam. Further, the guide groove portion 35 maintains the lid-side depression 34 with respect to the container-side protrusion 33 at a fixed position so that the lid body 11 can move up and down smoothly, and the lid body 11 is raised when the lid body 11 is raised by the vapor pressure. Can be eliminated.

  When the lid 11 is raised and slid relative to the container body 1, the lower edge of the lid inner fitting portion 15 is separated from the upper edge of the container inner fitting portion 5, and is formed in the flat portion above the container fitting portion 4. At the same time as opening the inner opening of the container body 1 of the steam vent groove 27, the lower edge of the lid outer fitting portion 16 reaches the upper edge of the container outer fitting portion 6, and the lid is opened from the outer opening of the container body 1 of the steam vent groove 27. The lower edge of the outer fitting portion 16 is opened to the outside. Therefore, when the lid body 11 is lifted from the container body 1 by a steam pressure of a certain level or more of the superheated steam in the container body 1, the fitting between the container fitting portion 4 and the lid fitting portion 14 is half-released and the container side collision When the portion 33 and the lid-side depression 34 are engaged, the superheated steam in the container main body 1 can be discharged out of the container main body 1 by opening the inner and outer openings of the steam vent groove 27.

  In addition, the code | symbol attached | subjected in each means of the means for solving said subject and the effect of invention was attached | subjected in order to make easy reference with the part which shows each structure part described in drawing. The present invention is not limited to these descriptions, structures, shapes, and the like indicated by reference numerals and the like in the drawings.

It is a disassembled perspective view which shows one form for implementing this invention. It is a partially notched essential part exploded perspective view in a vapor | steam exhaust mechanism similarly. It is sectional drawing in a vapor vent groove | channel similarly, (a) is at the time of obstruction | occlusion, (b) shows the time of opening. The 1st stopper means is similarly shown, The (a) is a longitudinal cross-sectional view, (b) is the bb sectional view taken on the line in (a). It is an exploded perspective view in other embodiments similarly. It is a partially cutaway exploded perspective view showing the second stopper means. It is the sectional drawing similarly, The (a) shows at the time of obstruction | occlusion of the fitting state of a container main body and a cover body, (b) shows the time of vapor | steam discharge | emission of the lifted state of a cover body. Similarly, it is sectional drawing in a vapor venting groove part, (a) shows at the time of closure, and (b) shows at the time of opening.

  Hereinafter, one embodiment for carrying out the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a state in which various cooked products F cooked in a microwave oven (not shown) are enclosed, It is a container main body in which an opening part is covered with the cover body 11 fitted by what is called an internal fitting type or an external fitting type. As shown in the figure, the container body 1 basically has, for example, an almost octagonal shape as a whole, and is a substantially circular recess on the plane that accommodates the cooked food F or its ingredients. A container housing portion 2 formed in a portion, and a container flange portion 3 that is formed in a substantially flat shape around the container housing portion 2 and includes a container fitting portion 4 that fits the lid body 11. It is made up. In the illustration, the container flange portion 3 itself is the container fitting portion 4, but the illustration is omitted instead, but the cross section is convex on the container flange portion 3 formed with a predetermined width. Thus, the container fitting portion 4 can be formed.

  The container flange part 3 itself is formed in a so-called swelled frame shape so as to exhibit a rectangular shape with a predetermined width in cross section by the container fitting part 4 toward the upper part of the container main body 1, and from the lower part to the upper part. Along with this, the width is gradually increased. And the inner side fitting part 5 of the inner side in the container fitting part 4 and the inner side fitting part 6 of the outer side of the container outside fitting part 6 are fitted inside the lid of the lid fitting part 14 in the lid 11 described later. The inner surface of each of the portion 15 and the lid outer fitting portion 16 is in close contact with each other so that the inside and outside of the container body 1 are blocked and shielded.

  On the other hand, the lid body 11 basically has an octagonal shape when viewed from a plane that is substantially similar to the container body 1, and is a plane that accommodates the cooked product F in the same manner as the container housing portion 2 in the container body 1. A lid accommodating portion 12 that has a substantially circular shape and bulges upward in a dome shape corresponding to the container accommodating portion 2, and is formed in a substantially flat shape around the lid accommodating portion 12. A lid fitting portion 14 is provided which is almost forcibly fitted to the container fitting portion 4, and includes a lid flange portion 13 which abuts on the container flange portion 3. In the illustration, the lid flange portion 13 itself is the lid fitting portion 14, but the illustration is omitted instead, but a convex shape is formed in cross section on the lid flange portion 13 formed with a predetermined width. Thus, the lid fitting portion 14 can be formed.

  The lid accommodating portion 12 bulges upward in a dome shape to secure a cooking space for the cooked product F to be cooked in the container body 1, and has a steaming effect on the cooked product F by the steam generated from the cooked product F. Make it even more effective. That is, the dome-shaped lid housing portion 12 makes the fluctuation of the steam pressure of the superheated steam generated in the container main body 1 slow and uniform, exerts a heating effect on the entire cooked product F, and also with respect to the center of the container main body 1. In combination with the steam discharge mechanism 21 arranged at a symmetrical position, the steam and heating are uniform throughout the container body 1 by discharging steam during heating, convection of superheated steam, and the like.

  The planar shapes of the container body 1 and the lid 11 are not limited to the illustrated examples. For example, as shown in FIG. 5, the overall planar shape is basically a rectangle such as a square or a rectangle, and the illustration is omitted. Can be formed as other polygons, circles or the like.

  In addition, each of the container body 1 and the lid body 11 is provided with heat resistance that is not melted by electromagnetic heating by a microwave oven so that the adhesion of the contact portion by the container fitting portion 4 and the lid fitting portion 14 is maintained. Both are formed of the same effect material so that the thermal expansion coefficient is substantially the same. For example, a plastic sheet having a predetermined thickness with good heat resistance such as stretched polystyrene resin (OPS), heat-resistant stretched polystyrene resin (heat-resistant OPS), polypropylene resin, etc. is molded by thermoforming methods such as pressure forming and vacuum forming. is there.

  A container fitting portion 4 and a lid fitting portion 14 for fitting the container main body 1 and the lid body 11 in a substantially sealed state are shown in the figure and are substantially octagonal when viewed from the plane along the peripheral edge of the container main body 1 and the lid body 11. It is arranged and formed as a frame-like container flange portion 3 and a lid flange portion 13 each having a shape (see FIG. 1). And in the inner peripheral part of the container fitting part 4 in the container main body 1, it folds down from the inner edge of the container flange part 3, and gradually becomes slightly outward from the inner side of the container main body 1 as it goes downward. While forming the container inner fitting part 5 which inclines so that it may expand, the outer peripheral edge part of the container fitting part 4 is continuously folded down from the outer edge of the flat container flange part 3 and reaches the lower part. Along with this, a container outer fitting portion 6 that is inclined so as to be slightly narrowed from the outer side to the inner side of the container main body 1 is formed.

  Moreover, in the inner peripheral edge part of the cover fitting part 14 in the cover body 11, it continues from the inner edge of the cover flange part 13 in the shape of a fold, and gradually goes slightly from the inner side to the outer side of the cover body 11 as it goes downward. A lid inner fitting portion 15 that is inclined so as to expand is formed, and at the outer peripheral edge portion of the lid fitting portion 14, it continues from the outer edge of the flat lid flange portion 13 in a folded shape and reaches the lower side. Accordingly, the lid outer fitting portion 16 is formed so as to be gradually narrowed from the outer side to the inner side of the lid body 11 gradually.

  The container inner fitting portion 5 in the container main body 1 and the lid inner fitting portion 15 in the lid body 11 are the container outer fitting portion 6 in the container main body 1 and the lid outer fitting portion 16 in the lid body 11. They are fitted together so that they are slightly forced together, and after fitting, the inside and outside of the container body 1 are shut off. Moreover, when the container main body 1 is sealed by the lid 11, the vapor pressure generated in the container main body 1 is relatively set so that they are separated from each other at the fitting portion between the container fitting portion 4 and the lid fitting portion 14. Therefore, it slides slightly.

  That is, in the container inner fitting portion 5 and the lid inner fitting portion 15, the inner width of the upper edge of the container inner fitting portion 5 is compared with the outer width of the lower edge of the lid inner fitting portion 15. In the container outer fitting portion 6 and the lid outer fitting portion 16, the outer width of the upper edge of the container outer fitting portion 6 is slightly smaller than the inner width of the lower edge of the lid outer fitting portion 16. It is small. Then, the container fitting portion 4 is forcedly pushed into the container body 1 side with the lower edge of the lid fitting portion 14 facing the upper edge of the container fitting portion 4 and abutted against the container fitting portion 4. The inner and outer portions of the lid fitting portion 14 are fitted together, and the lid fitting portion 14 is in close contact with the container fitting portion 4 so that the opening of the container body 1 can be covered with the lid body 11. In this way, the container body 1 is covered with the lid body 11 so that the container body 1 is almost sealed, for example, a sanitary state is ensured at the time of display sale, and the lid body 11 is removed from the container body 1 during cooking. Even if it is forcibly removed, for example, it is possible to fill cooking water, seasoning water, etc. at the time of cooking, and to provide food F after cooking.

  In addition, as the lower edge portion of the container outer fitting portion 6 in the container main body 1 reaches the lower edge, it gradually expands outward from the container main body 1 to form an inclined portion. Similarly, as the lower edge portion of the fitting portion 16 reaches the lower edge, it gradually expands outward from the lid body 11 so as to be in close contact with each other as an inclined portion. Moreover, the reinforcement property of the outer edge part of the container main body 1 and the cover body 11 is improved by forming the outward inclined part.

  Further, when the container main body 1 and the lid 11 are fitted and combined in a sealed state and cooked in a microwave oven, a steam discharge mechanism 21 that discharges steam generated from the cooked product F to the outside is provided in the container flange 3. The lid flange portion 13 is provided in a contact portion between the container fitting portion 4 and the lid fitting portion 14 in close contact with each other. When the steam pressure generated in the container body 1 exceeds a certain level, the steam discharge mechanism 21 joins the container flange portion 3 of the container body 1 and the lid flange portion 13 of the lid body 11 by the steam pressure of the superheated steam. That is, the container fitting part 4 and the lid fitting part 14 are locked with each other in a state where the lid fitting part 14 fitted to the container fitting part 4 is lifted upward, that is, in a state where the fitting is halfway released. The stopper means 22 is formed with a steam vent groove 27 that closes when fitted and opens the inside of the container body 1 and the outside of the container body 1 when released. As shown in the figure, the steam discharge mechanism 21 is located outside the container housing portion 2 that has a circular shape in a plane, for example, at the peripheral portion of the container flange portion 3 that has a substantially octagonal shape in a plane. For example, a total of two are arranged at point-symmetrical positions with respect to the center (see FIG. 1). The arrangement | positioning site | part of the vapor | steam discharge | emission mechanism 21 is not limited to this from the first, and even if it is each edge part, it is arrange | positioned in arbitrary parts, such as a corner part of the container flange part 3, not only the edge position It is also possible to form.

  As shown in FIGS. 1 to 4, the first stopper means 22 is a container body 1 in which a container outer fitting portion 6 of the container fitting portion 4 is bulged outwardly from the container body 1. In the side projection 23 and the lid body 11, a lid side depression portion that is recessed inwardly in the lid body 11 in the lid outer fitting portion 16 in the lid fitting portion 14 and is locked to the container side projection portion 23. 24. Each of the container-side protrusion 23 and the lid-side depression 24 is located above and below the fitting direction of the container body 1 and the lid 11, and one is the upper edge of the container fitting portion 4 or the lid fitting portion 14. The other is located at the lower edge of the lid fitting portion 14 or the container fitting portion 4, and when the lid body 11 slides in the opening direction with respect to the container body 1, The container-side protrusion 23 is engaged with the container-side protrusion 23 or the lid-side depression 24 at the upper edge position.

  In addition, the container-side protrusion 23 and the lid-side depression 24 have a substantially mountain shape that bulges in a cross section of, for example, about 0.5 to 1.0 mm, and has a predetermined width, for example, a length of about 10 mm. When the lid 11 is applied to the container main body 1, the lid 11 is forcibly pushed in and fitted together by getting over each other. And even if it slides and it mutually engages with the steam pressure of the superheated steam which arises in the container main body 1, the engagement is a grade which is not cancelled | released unless provision of forced external force is given.

  In the upper part or the lower part of the container outer fitting part 6 outer surface and the lid outer fitting part 16 inner surface in the container side protrusion 23 part and the lid side depression part 24 part, respectively, the bulging container side protrusion 23 and the lid side Forming at least one of the container-side bulging portion 25 and the lid-side bulging portion 26 that slightly bulges so as to be in close contact with the opposite side surface so as to close the gap formed by the recessed portion 24, The inside and outside of the container body 1 are shielded and shielded so that the opposed inner and outer surfaces are in close contact with each other.

  As shown in the figure, the first stopper means 22 itself is disposed at least on both sides of the steam vent groove 27 and prevents the lid 11 from being released from the container body 1 by the steam pressure of the superheated steam. In order to raise the lid 11 from the container body 1 on the average, the container flange portion 3 and the lid flange portion 13 are arranged at equal intervals, for example, in pairs at the edge portions of the container flange portion 3 and the lid flange portion 13. is there.

  Further, as shown in FIGS. 1 to 3, the steam vent groove 27 is a container flange portion 3 in the container body 1, that is, a flat upper edge portion in the container fitting portion 4, and an inner container inner fitting connected to the upper edge portion. It is formed in a groove shape so as to be continuous with the portion 5 wall and the outer container outer fitting portion 6 wall. Then, at the lower edge portion of the container inner fitting portion 5 wall and the container outer fitting portion 6 wall on the container body 1 side, when there is no vapor pressure in the container body 1, the lid flange portion 13 on the lid body 11 side. That is, the lower edges of the lid inner fitting portion 15 wall inside the lid fitting portion 14 and the outer lid outer fitting portion 16 wall are in close contact with each other. When superheated steam is generated in the container body 1, reaches a predetermined steam pressure and the lid body 11 slides relative to the container body 1, the close state of these lower edge portions is released, and the inside and outside of the steam vent groove 27 are removed. The inside and outside of the container main body 1 communicate with each other by opening both edges of the opening portion. That is, when the vapor pressure of the superheated steam in the container main body 1 exceeds a certain level, the lid 11 is lifted from the container main body 1, but the lid 11 remains engaged with the container main body 1 by the stopper means 22. The vent groove 27 is opened, and the steam inside the container body 1 is transferred to the steam vent groove 27 through the container inner fitting portion 5 of the container fitting portion 4, the upper edge, and the container outer fitting portion 6. To exhaust.

  Reference numeral 41 in the figure denotes a handle portion, and a plurality of the flange portions 3 of the container main body 1 are arranged, for example, substantially parallel to the flat upper edge portion of the container flange portion 3 on the edge side facing the center of the container main body 1. It is provided by forming a groove for reinforcing the strip. Reference numeral 42 denotes a label affixing portion, which is composed of a flat inclined surface formed on the upper surface of the lid accommodating portion 12 in the lid 11 so that a predetermined label that displays and explains the product content, cooking method, and the like can be affixed. .

  5 to 8 show another embodiment, and the second stopper means 32 in this embodiment has a rounded rectangular shape, for example, a substantially square shape when seen from the plane. In the formed container main body 1 and the lid body 11, it arrange | positions at the edge part of each edge of each four corner part at a pair shape. That is, the container outer fitting portion 6 wall in the container fitting portion 4 of the container flange portion 3 is made larger than the height of the container inner fitting portion 5 wall, and the lid in the lid fitting portion 14 of the lid flange portion 13 is used. The inner fitting portion 15 wall height is substantially the same as the container inner fitting portion 5 wall height, the inner surface of the lid inner fitting portion 15 is brought into close contact with the outer surface of the container inner fitting portion 5, and the inner surface of the lid outer fitting portion 16 Is formed in close contact with the outer surface of the container outer fitting portion 6. The steam vent groove 27 is formed in a hollow shape in the flat portion of the container body 1 at the top of the container fitting portion 4, and both opening portions of the steam vent groove 27 are fitted inside the container of the container fitting portion 4. An opening is formed along the inner and outer directions of the container body 1 at the upper edge portion of each of the portion 5 and the container outer fitting portion 6.

  As shown in FIGS. 6 and 7, the second stopper means 32 bulges outward from the container body 1 at the upper edge portion of the container outer fitting portion 6 in the container fitting portion 4 of the container body 1. When the lid 11 is raised, the container-side protrusion 33 and the lower edge portion of the lid outer fitting portion 16 of the lid fitting portion 14 of the lid 11 are recessed inward in the lid 11. Then, the lid-side depression 34 whose upper surface engages with the lower surface of the container-side protrusion 33 and the width of the container-side protrusion 33 are substantially the same, and the lid is formed at a position above the lid-side depression 34 in the lid outer fitting portion 16. It comprises a guide groove portion 35 bulging outwardly from the body 11 and continuing to the lid-side depression 34.

  Further, in the lid fitting part 14 fitted to the container fitting part 4 at a part other than the second stopper means 32 part, the lid 11 is removed from the container main body 1 by the vapor pressure of the superheated steam in the container main body 1. When sliding upward, the container outer fitting portion 6 wall and the lid outer fitting portion 16 wall that is in close contact therewith form a gap that flows in and out of the container body 1, and the superheated steam guided from the steam vent groove 27. Is discharged out of the container body 1. That is, as shown in FIG. 8, the lid outer fitting portion 16 other than the stopper means 32 site is in close contact with the container outer fitting portion 6 and the lid inner fitting portion 15 is forced to the container inner fitting portion 5. The inside and outside of the container main body 1 are shielded and blocked by being fitted in. In this state, when the lid body 11 is raised by the steam pressure of the superheated steam, the lower edge of the lid inner fitting portion 15 is separated from the upper edge of the container inner fitting portion 5, and the flat portion at the upper portion of the container fitting portion 4 is formed. At the same time when the inner opening of the container main body 1 of the formed steam vent groove 27 is opened, the lower edge of the lid outer fitting portion 16 reaches the upper edge of the container outer fitting portion 6, and the steam of superheated steam guided by the steam vent groove 27. Even if it is forced from the outside opening of the container main body 1 of the steam vent groove 27 by the pressure, the lower edge of the lid outer fitting portion 16 is opened to the outside and the superheated steam is discharged.

  In any of the embodiments, the steam vent groove 27 is provided in a portion where the width of the container flange portion 3 in the container main body 1 is minimum, and the stopper means 22 and 32 are provided in the container flange portion 3 and the lid flange portion. It is desirable that each of the 13 widths is formed at the maximum portion, so that the steam discharge efficiency can be improved and the lid body 11 can be prevented from being detached from the container body 1 during the steam discharge.

  Next, an example of the use of this will be described. For example, the ingredients of the cooked food F that can be eaten by steaming, etc. are encapsulated together with packed seasoned water seasoned with a predetermined seasoning and sold. It is assumed that the half-cooked material and other packed products are accommodated in the container body 1, and the lid fitting portion 14 of the lid body 11 is fitted to the container fitting portion 4 of the container body 1. The container body 1 is sealed with the lid 11. In cooking, a predetermined seasoning water or the like is added to the material in the opened container main body 1, sealed again, and cooked in a microwave oven for a predetermined time. At the time of heating by the microwave oven, the cooked product F is heated, and at the same time, moisture such as seasoning water stored in the container body 1 is steamed to cook the material, and the container body 1 has a predetermined steam. Pressure is generated. This vapor pressure lifts the lid body 11 from the container body 1 so as to open the lid body 11 from the container body 1, and the lower edge of each of the lid inner fitting portion 15 and the lid outer fitting portion 16 is inside the container inside. The fitting part 5 and the container outer fitting part 6 are separated from the upper edges of the respective parts, and the inner and outer opening edges of the steam release groove 27 are opened to form a steam discharge path.

  On the other hand, in the stopper means 22, 32, the container-side protrusion 23 and the lid-side depression 24 are engaged to prevent the lid 11 from being detached from the container body 1. When a certain amount of steam is discharged and the inside of the container body 1 is in a negative pressure state, the lid 11 closes the container body 1 again, and when the steam pressure in the container body 1 increases with heating, the lid body 11 opens again. Then, the steam is discharged, and the cooked product F is cooked while these are repeated. After the elapse of a predetermined heating time, the lid 11 is removed from the container body 1 after being taken out from the microwave oven and sufficiently steamed, and then served. In addition, after discharge | emissioning a predetermined amount of superheated steam, since the container main body 1 is in a negative pressure state, seasoning water etc. penetrate | infiltrate further into the raw material of the cooked product F, further promotes cooking, and is delicious. Let it be.

F ... Cooked food 1 ... Container body 1 2 ... Container receiving part 3 ... Container flange part 4 ... Container fitting part 5 ... Container inner fitting part 6 ... Container outer fitting part 11 ... Lid 12 ... Lid accommodating part 13 ... Lid flange 14: Lid fitting part 15: Lid inner fitting part 16 ... Lid outer fitting part 21 ... Steam discharge mechanism 22 ... First stopper means 23 ... Container side protrusion 24 ... Lid side depression 25 ... Container Side bulging part 26 ... Lid side bulging part 27 ... Vapor vent groove 32 ... Second stopper means 33 ... Container side protrusion 34 ... Lid side recess part 35 ... Guide groove part 41 ... Handle part 42 ... Label attaching part

Claims (7)

  A lid fitting part formed on the peripheral part of the lid on the container fitting part formed on the peripheral part of the container main body, and a lid body that covers the opening of the container main body, and a container main body that accommodates the cooked product A steam packaging mechanism that seals the container body by forcibly fitting it, and lifts the lid from the container body with the steam pressure of the superheated steam generated in the container body to discharge the superheated steam outside the container body This steam discharge mechanism is fitted with stopper means for locking the container fitting portion and the lid fitting portion with the lid fitting portion fitted to the container fitting portion raised upward. A food packaging container for a microwave oven, which is formed by forming a steam vent groove that is closed at times and opens and communicates between the inside of the container body and the outside of the container body when lifted.   The steam vent groove is recessed in the upper edge part of the container fitting part in a groove shape, or continuous with this upper edge part, and the inner container inner fitting part wall and the outer container outer fitting part wall are grooved. The food packaging container for a microwave oven according to claim 1, wherein the food packaging container is formed by being recessed.   The first stopper means includes a container-side protrusion that protrudes outwardly from the container body fitting portion of the container fitting portion of the container body, and a lid outer fitting at the lid fitting portion of the lid body. The food packaging container for a microwave oven according to claim 1 or 2, further comprising: a lid-side depression portion that is recessed in a lid shape toward the inside of the lid body, and that engages with the container-side protrusion when the lid body is raised and slid.   Each of the container-side protrusion and the lid-side depression is positioned above and below each other along the fitting direction of the container body and the lid, one on the upper edge of the container fitting or lid fitting, and the other on the lid When the lid is slid in the opening direction with respect to the container body and located at the lower edge of the joint or container fitting part, the lid-side depression or container-side protrusion at the lower edge position is at the upper edge position The food packaging container for microwave ovens according to claim 3, wherein the food packaging container is for engagement with a container-side protrusion or a lid-side depression.   The container-side bulge that bulges in close contact with the opposite side surface at the container outer protrusion portion outer surface, the container outer fitting portion outer surface, and the upper portion or lower portion of the lid outer fitting portion inner surface at each of the container side protrusion portion and the lid side depression portion portion. The food packaging container for a microwave oven according to claim 3 or 4, wherein at least one of a protruding portion and a lid-side expanded portion is formed.   The second stopper means includes a container-side protrusion bulging outwardly from the container body at the upper edge portion of the container outer fitting portion of the container fitting portion of the container body, and a lid fitting portion of the lid body A lid-side depression portion in which the upper surface engages with the lower surface of the container-side protrusion when the lid is raised, and a container-side protrusion of the container-side protrusion. 2. A guide groove that is substantially the same width as the width, and that bulges outwardly from the lid body on the lid outer fitting portion above the lid-side depression and continues to the lid-side depression. Food packaging containers for microwave ovens.   When the lid is raised and slid with respect to the container body, the lower edge of the inner fitting part of the lid is separated from the upper edge of the inner fitting part of the container, and the container body of the steam vent groove formed in the flat part of the upper part of the container fitting part At the same time as opening the inner opening of the lid, the lower edge of the lid outer fitting part reaches the upper edge of the container outer fitting part, and the lower edge of the lid outer fitting part is opened to the outside from the outer opening of the container body of the steam release groove. The food packaging container for microwave ovens according to any one of claims 1 to 6.

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