JP7138224B1 - microwave container - Google Patents

Abstract

An object of the present invention is to provide a container having excellent fitting strength between an inner plate and a container body, allowing the fitting state to be easily grasped by a click feeling, and having excellent fitting state stability. A container body (1) has a first fitting recess (13b) recessed outward and a second fitting recess (13b) recessed outward and provided below and inside the first fitting recess (13b). 14b, and the middle plate 2 protrudes outward to fit inside the second fitting recess 14b when the lid is closed, and from the middle plate fitting projection 40b. The lid 3 has a top surface portion 50 and a pressure receiving convex portion 45 provided on the outer side, and the lid 3 is provided on the outer side of the top surface portion 50 and is fitted inside the first fitting recess portion 13b in the closed state. It has a lid fitting convex portion 53b and a lid extension portion 52 which is provided between the top surface portion 50 and the lid fitting convex portion 53b and pushes down the pressure receiving convex portion 45 when the lid is closed. [Selection drawing] Fig. 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave-compatible container capable of heating food contained therein with a closed lid in a microwave oven.

In a packaging container of a type in which a container body, an inner plate, and a lid are fitted together, steam is generated when contents such as food contained therein are heated in a microwave oven. Therefore, it is necessary to discharge this water vapor to the outside of the container. As a method for discharging the water vapor to the outside of the container, there is a method of perforating a ventilation hole or forming a ventilation path in the container. Here, if the generated water vapor cannot be properly discharged, the pressure inside the container increases, and the inner plate comes off, causing the ingredients placed on the inner plate to fall and the soup contained in the main body to drop. There is a risk that the liquid will leak out, making it impossible to obtain the desired cooking effect, and that the lid will come off from the container body.

Therefore, as disclosed in Patent Documents 1 and 2 below, for example, there is known a middle plate having a shape in which a convex portion is provided on the outer peripheral surface of the middle plate so as to be fitted to the reverse tapered portion of the container body. Further, Patent Document 2 discloses a technique in which an upwardly protruding annular rib is provided on the flange portion of the intermediate plate in order to increase the strength of the intermediate plate itself and prevent it from coming off from the main body.

However, as disclosed in Patent Documents 1 and 2, when the inner fitting portion of the container body is configured with a linear reverse taper and the convex portion of the inner plate is fitted, theoretically, point contact is not possible. Therefore, sufficient fitting strength was not exhibited.

In addition, in the method of pushing the convex portion into the reverse tapered side surface as in Patent Documents 1 and 2, it is difficult to grasp the fitting end point during the fitting operation, and the fitting must be stopped before the fitting is completed. There is a high possibility that the product will be lost, and the workability is poor.

In addition, although the annular rib provided on the middle plate peripheral flange described in Patent Document 2 has the effect of increasing the strength of the middle plate itself, it does not exhibit the effect of stabilizing the completely fitted state.

JP 2020-196510 A Japanese Patent Application Laid-Open No. 2021-1024

The problem to be solved by the present invention is to provide a container in which a container body, a middle plate, and a lid are fitted by an internal fitting method, and the strength of fitting between the middle plate and the container body is excellent, and a click feeling in the fitting state is provided. To provide a container which can be easily grasped by a user and is excellent in stability of a fitting state.

A microwave container according to the present invention is a microwave container in which an inner plate and a lid are internally fitted to a container body, and the container body includes a first fitting concave portion recessed outward and a first fitting concave portion. a second fitting recess that is provided below and inside the fitting recess and is recessed toward the outside; The cover has a middle plate fitting convex portion to be fitted and a pressure receiving portion provided outside the middle plate fitting convex portion. and a pressing portion provided between the top surface portion and the lid fitting protrusion for pressing the pressure receiving portion downward when the lid is closed. ing.

In the container having this structure, for example, the first food can be put in the container body, and the second food can be put in the middle plate. By fitting the inner plate into the container body, the second food can be stored separately from the first food. Since the middle plate is internally fitted to the container body, the sealing property between the middle plate and the container body is good, and the separation of the first food and the second food can be maintained. Then, with the lid closed, it can be placed in a microwave oven for cooking.

When the worker pushes the middle plate into the container body, the middle plate fitting convex portion eventually fits into the second fitting concave portion. At that time, a click feeling is transmitted to the operator's hand. Therefore, the operator can feel that the middle plate fitting convex portion is fitted to the second fitting recessed portion from the feel of the hand, and the middle plate is accurately fitted to the proper portion of the container body. can know that That is, the fitting state of the inner plate can be easily grasped, and the inner plate can be mounted accurately up to the regular position.

For example, the second food material is placed on the middle plate. After that, a lid is attached to the container body. When the operator internally fits the lid into the container body, the lid-fitting projection fits into the first fitting recess. At that time, a click feeling is transmitted to the operator's hand. Therefore, the operator can feel that the lid-fitting convex portion is fitted into the first fitting recessed portion from the touch of the hand, and the lid is correctly fitted to the proper portion of the container body. can know In other words, the fitting state of the lid can be easily grasped, and the lid can be securely attached to the container body.

Further, when the operator fits the lid into the container body, the pressing portion of the lid pushes the pressure receiving portion of the inner plate downward. Therefore, the inner fitting state of the inner plate with the container main body is further strengthened. On the other hand, when the pressing portion pushes down the pressure receiving portion, the pressing portion receives an upward reaction force from the pressure receiving portion. The inner fitting state of the lid is not released, and the inner fitting state is maintained.

In particular, the middle plate has a middle plate flange portion provided outside the middle plate fitting convex portion, and the middle plate flange portion is provided with a pressure receiving convex portion projecting upward as a pressure receiving portion. is preferred. According to this configuration, when the lid is closed, the pressure-receiving convex portion of the middle plate flange portion is pushed downward by the pressing portion of the lid. In this way, when the lid is closed, the middle plate fitting projection is fitted into the second fitting recess, and the pressure receiving projection of the middle plate flange is pushed downward by the pressing portion of the lid. The inner fitting state of the inner plate with respect to the is firm.

Furthermore, it is preferable that the container body has a step portion below the first fitting recess, and the step portion supports the inner plate flange portion from below when the lid is closed. According to this configuration, when the lid is closed, the pressing portion of the lid pushes the pressure-receiving convex portion of the middle-plate flange portion downward, and the step portion of the container body supports the middle-plate flange portion from below. That is, the middle plate flange portion is held vertically by the pressing portion of the lid and the stepped portion of the container body. Therefore, the inner fitting state of the inner plate with the container main body is further strengthened.

In addition, the container body has a second step portion below and inside the step portion (hereinafter, this step portion may be referred to as the “first step portion”), and the middle plate is fitted with the middle plate. It is preferable that an extending portion extending inward and outward is provided between the convex portion and the middle plate flange portion, and the second step portion supports the extending portion from below when the lid is closed. According to this configuration, when the lid is closed, the pressing portion of the lid presses down the pressure-receiving convex portion of the middle-plate flange portion, thereby bringing the middle-plate flange portion into close contact with the first step portion of the container body. The extended portion of the inner plate comes into close contact with the second stepped portion of the container body. That is, the middle plate flange portion and the extension portion are brought into close contact with two upper and lower portions of the container body. Therefore, the inner fitting state of the inner plate with the container main body is further strengthened. As a result, for example, when the first food is a liquid such as soup, it is possible to effectively prevent the liquid from leaking from the fitting portion of the inner plate.

In addition, when the lid is opened and the inner plate is fitted to the container body, the inner plate flange portion and the extension portion are in contact with the first step portion and the second step portion, respectively. is preferred. According to this configuration, when the lid is closed, the pressing portion of the lid presses the pressure-receiving convex portion of the inner plate downward, thereby further increasing the degree of close contact between the flange portion of the inner plate and the extension portion to the container body. As a result, the attachment state of the inner plate to the container body is further stabilized.

As described above, the container according to the present invention is excellent in the fitting strength between the inner plate and the container body, the fitting state can be easily grasped by a click feeling, and the fitting state is also excellent in stability. there is

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the lid open state of the container for microwave ovens in one Embodiment of this invention. FIG. 2 is a cross-sectional view of the main part showing the lid of the container in an open state; A cross-sectional view of the main part showing the mounting state of the inner plate of the same container. Fig. 3 is a cross-sectional view of a main part showing a closed state of the container; A plan view of the middle plate of the same container. FIG. 6 is an enlarged view of a main portion of FIG. 5; AA end view of FIG. FIG. 8 is an enlarged view of a main portion of FIG. 7; Fig. 10 is a cross-sectional view of the main part when the inner plate is internally fitted to the container body of the same container; Fig. 10 is a cross-sectional view of the main part when the inner plate is internally fitted to the container body of the same container; FIG. 4 is a cross-sectional view of the main part when the lid is internally fitted to the container body of the same container. FIG. 4 is a cross-sectional view of the main part when the lid is internally fitted to the container body of the same container. (a) and (b) are partial enlarged plan views of the inner plate of the microwave container according to another embodiment of the present invention.

Hereinafter, a microwave container and its inner plate according to an embodiment of the present invention will be described with reference to FIGS. 1 to 13. FIG. The container in the present embodiment is for containing various foods, and is a microwave-compatible container that can be heated in a microwave oven with the lid closed without being opened.

As shown in FIG. 1 , the container in this embodiment has a container body 1 , an inner plate 2 fitted inside the container body 1 , and a lid 3 fitted inside the container body 1 . The container body 1, the inner plate 2 and the lid 3 are all formed from a synthetic resin sheet by various thermoforming (sheet forming) such as vacuum forming and pressure forming. Since the container has the inner plate 2, it is suitable for storing and selling food in a state of being vertically separated. The storage space of the container is partitioned vertically by the middle plate 2, and is separated into a lower space (first space) below the middle plate 2 and an upper space (second space) above the middle plate 2. Different types of food can be stored separately in the lower space and the upper space. For example, the lower space can be filled with liquid such as dashi stock and soup, and the upper space can be filled with ingredients such as noodles and ingredients.

For example, in the case of noodles, dashi stock or soup can be placed in the lower space, and noodles and ingredients can be placed in the upper space. Dashi and soup may be solidified with gelatin, or may be melted by heating in a microwave oven to become liquid. It is also suitable for hotpot dishes, and the lower space can be filled with dashi stock, while the upper space can be filled with ingredients. Although various kinds of foodstuffs may be used as described above, it is particularly suitable for storing foodstuffs containing moisture or liquids, especially foodstuffs containing a lot of moisture or liquids, which require high sealing performance.

The shape of the container in a plan view is arbitrary, and may be polygonal, elliptical, oval, oval, etc. in addition to round, but round is preferred. The container of this embodiment is circular in plan view. In the case of a polygon, each side may be linear or may be configured to bulge outward in an arc shape. Each corner may be arcuate, ie rounded.

The container main body 1 includes a main body bottom portion 10, a main body side portion 11 extending from the peripheral edge portion of the main body bottom portion 10 while expanding upward, and a main body flange portion extending outward from the upper end portion of the main body side portion 11. 12. The body bottom portion 10 may be provided with legs (not shown) of various shapes.

As shown in FIGS. 2 to 4, the body side surface 11 is provided with a first body fitting portion 13 into which the lid 3 is fitted and a second body fitting portion 14 into which the inner plate 2 is fitted. ing. The first body fitting portion 13 and the second body fitting portion 14 are preferably provided over the entire circumference. The first body fitting portion 13 is provided, for example, in the vicinity of the upper end portion of the body side face portion 11, and the second body fitting portion 14 is located downwardly and away from the first body fitting portion 13. Located far inside. Both the first main body fitting portion 13 and the second main body fitting portion 14 are configured to have a fitting recess recessed radially outward on the inner surface thereof. Although the cross-sectional shape of the fitting recess may be various, it is preferably curved outward and has an arcuate cross-sectional shape or a trapezoidal cross-sectional shape, with an arcuate cross-sectional shape being particularly preferred.

As an example, the first body fitting portion 13 includes a first body fitting main portion 13a extending substantially vertically (perpendicular or slightly reverse tapered shape or slightly forward tapered shape) along the vertical direction, and a first body fitting main portion 13a recessed outward. It has a first fitting recess 13b. Most of the entirety of the first body fitting main portion 13a is located above the first fitting recess 13b. That is, the first fitting concave portion 13b is located below the first body fitting portion 13, and the first body fitting main portion 13a is located above the first body fitting portion 13. there is It is preferable that the vertical length of the first main body fitting main portion 13a is longer than the vertical length of the first fitting concave portion 13b. The first fitting recess 13b is preferably provided over the entire circumference.

The second main body fitting portion 14 has a second main body fitting main portion 14a extending substantially vertically along the up-down direction and a second fitting concave portion 14b recessed outward. Most of the entirety of the second body fitting main portion 14a is located above the second fitting concave portion 14b. That is, the second fitting concave portion 14b is located below the second body fitting portion 14, and the second body fitting main portion 14a is located above the second body fitting portion 14. there is The second fitting recess 14b is preferably larger than the first fitting recess 13b. That is, the fitting force (fitting strength) between the container body 1 and the inner plate 2 is preferably larger than the fitting force between the container body 1 and the lid 3 . The vertical length of the second fitting recess 14b is preferably longer than the vertical length of the first fitting recess 13b. It is preferable that the amount of recession is larger than that of the joint recess 13b. The vertical length of the second main body fitting main portion 14a is preferably shorter than the vertical length of the first main body fitting main portion 13a. The second fitting recess 14b is preferably provided over the entire circumference.

Between the first main body fitting portion 13 and the second main body fitting portion 14, it is preferable to provide a first step portion 19 and a second step portion 17 in a stepped shape when viewed in cross section. It is preferable that a third step portion 15 continuing in a stepwise manner from the second step portion 17 through the second body fitting portion 14 in a cross-sectional view is provided below the joining portion 14 . Specifically, a third step portion 15 extending outward is provided on the upper portion of the main body side portion 11 , and the second main body fitting portion 14 extends upward from the third step portion 15 . Above the second main body fitting portion 14, a main body curved portion 16 that expands while curving is provided. The main body curved portion 16 is curved inwardly convex along the vertical direction. A second stepped portion 17 extending outward is provided on the outer side of the body curved portion 16 , and a body rising portion 18 extends upward from the second stepped portion 17 while expanding. A first step portion 19 extending outward is provided on the outside of the main body rising portion 18 , and the first main body fitting portion 13 extends upward from the first step portion 19 . The first step portion 19, the second step portion 17 and the third step portion 15 are inclined upward toward the outside or extend substantially horizontally. The second step portion 17 is preferably longer than the first step portion 19 and longer than the third step portion 15 .

The body flange portion 12 extends outward from the first body fitting portion 13 . The body flange portion 12 has a beaded portion 20 that connects with the first body fitting portion 13 . The beaded portion 20 curves upward in a cross-sectional view. The body flange portion 12 may be provided with a knob portion (not shown) for facilitating the lid opening operation.

It is preferable to form a main body edging portion 21 extending outward, for example horizontally or slightly downward, on the outer edge of the main body flange portion 12 . It is preferable to form a large number of fine irregularities in the outer region of the entire width of the main body edging portion 21 in the inward and outward directions, so that a reinforcing effect can be obtained and a finger cut can be prevented. The unevenness has a wavy shape when viewed from the front in an enlarged manner, and the direction in which the numerous peaks and valleys extend is the width direction (inner and outer directions). Further, the unevenness may be formed by, for example, flat knurling or twilled knurling, and it is particularly preferable to form by twilled knurling in order to prevent slippage.

<Middle plate 2>
The middle plate 2 has a middle plate bottom portion 30, a middle plate side portion 31 extending upward from the periphery of the middle plate bottom portion 30, and a middle plate flange portion 32 extending outward from the upper end of the middle plate side portion 31. ing. The middle plate 2 is shallower than the container body 1 and is housed in the container body 1. - 特許庁The middle plate 2 is entirely inserted into the container main body 1, but in the housed state, the middle plate bottom portion 30 is in a state of floating upward from the main body bottom portion 10. - 特許庁Various ribs may be formed on the inner plate bottom surface portion 30 , and a continuous rib may be provided from the inner plate bottom surface portion 30 to the inner plate side surface portion 31 .

As shown in FIGS. 1 and 5, the inner plate bottom surface portion 30 may be provided with a plurality of leg portions 33 projecting downward. The inner tray bottom part 30 protrudes downward in order to prevent a so-called blocking phenomenon in which the inner trays 2 are tightly fitted to each other and cannot be removed when a large number of the inner trays 2 are stacked at the time of collection. A middle plate convex portion 34 for preventing blocking may be provided. The positions of the middle plate convex portions 34 are shifted for each middle plate 2 and arranged. The downward projection amount of the middle plate convex portion 34 is smaller than the projection amount of the leg portion 33 .

The middle plate 2 is provided with a steam discharge portion for discharging steam generated in the lower space to the upper space. The steam exhaust is preferably provided on the inner plate bottom portion 30 . An example is shown in FIG. A steam exhaust valve 35 is provided as a steam exhaust portion at the central portion of the inner plate bottom portion 30 . The steam discharge valve 35 is formed by providing a notch of a predetermined shape in the inner plate bottom portion 30 . The shape of the vapor discharge valve 35 may vary, but preferably consists of a curvilinear slit, which in this embodiment is M-shaped. The steam exhaust valve 35 may be C-shaped as shown in FIG. 13(a) or may be J-shaped as shown in FIG. 13(b). It is preferable that the steam discharge valve 35 is formed so as to be able to centrally control the discharge of steam in a predetermined direction in a plan view. The direction in which the steam discharge valve 35 discharges steam is referred to as the steam discharge direction, and this steam discharge direction is the direction indicated by arrow P in FIG. In the C-shape as shown in FIG. 13(a) and the J-shape as in FIG. 13(b), the direction indicated by the arrow P is the steam discharge direction.

As shown in FIG. 6, surrounding ribs 36 are preferably provided around the steam exhaust valve 35 so as to surround the steam exhaust valve 35 in plan view. Although the surrounding ribs 36 may have various shapes in plan view, in the present embodiment, they are circular in plan view, that is, annular. As shown in FIG. 13(b), the surrounding rib 36 may have a rectangular shape in a plan view, or may have various shapes such as a polygonal shape in a plan view. The surrounding rib 36 protrudes upward. The cross-sectional shape of the surrounding rib 36 may be various. In this embodiment, the cross-sectional view is generally semicircular, but the cross-sectional view may be generally rectangular. Among them, the shape of a circular shape in a plan view and a substantially semicircular shape in a cross-sectional view of the present embodiment is preferable from the viewpoint that the strength of the inner plate 2 is excellent. Moreover, the width of the surrounding rib 36 is preferably in the range of 3 to 8 mm, and if it is circular in plan view, the inner diameter is preferably in the range of 2.2 to 3.5 mm. In the case of a rectangular shape in plan view, the length of one inner side is preferably in the range of 2.2 to 3.5 mm. The upward projection amount T of the surrounding rib 36 is such that the middle plate 2 can be prevented from bending when food such as noodles for cooking is placed on the middle plate bottom portion 30, and is preferably 2 to 5 mm.

Surrounding rib 36 is preferably provided with a notch 37 that traverses surrounding rib 36 . Preferably, a plurality of notches 37 are provided. Further, when the entire circumference of the surrounding rib 36 is virtually divided into a first half area 36a in the steam discharge direction and a second half area 36b on the opposite side to the steam discharge direction, the notch 37 has at least the first half area 36b. Preferably, it is provided in the half region 36a, and more preferably, it is provided in plurality in the first half region 36a. Although the depth D of the notch 37 may be set variously, it is preferably half or more of the projection amount T of the surrounding rib 36, as shown in FIG. 8, for example.

The area surrounded by the surrounding ribs 36 is a flat surface portion 38 without unevenness. That is, a flat surface portion 38 without irregularities is provided inside the surrounding rib 36 , and the steam discharge valve 35 is provided on the flat surface portion 38 . A protrusion amount T of the surrounding rib 36 is a protrusion amount from the flat surface portion 38 .

As shown in FIGS. 7 and 8, it is preferable that a one-way uneven portion 39 is formed on the upper surface of the inner plate bottom portion 30 . The unidirectional concave-convex portion 39 is a concave-convex portion extending along the steam discharge direction, and is composed of a large number of ridges or grooves. In this embodiment, a large number of ridges and grooves are formed along the steam discharge direction, and grooves are provided between adjacent ridges. As shown in FIG. 5, the one-way concave and convex portion 39 is provided on most of the inner plate bottom portion 30, and in detail, includes the surrounding ribs 36, the flat surface portion 38, the legs 33, and the anti-blocking inner plate. It is formed over the entire inner plate bottom surface portion 30 except for the convex portion 34 . It should be noted that the height of the surrounding rib 36 is higher than the height of the ridge, and is preferably at least twice the height of the ridge.

As shown in FIGS. 2 to 4, the intermediate plate side surface portion 31 is provided with an intermediate plate fitting portion 40 that fits inside the second body fitting portion 14 of the container body 1 . The inner plate fitting portion 40 has a fitting convex portion protruding radially outward on its outer surface. The cross-sectional shape of the fitting convex portion may be various, for example, it may be an outwardly curved bulging shape, such as an arcuate cross-sectional shape, or an outwardly bulging trapezoidal cross-sectional shape. is preferred. Further, the position of the fitting convex portion may be various, such as the lower portion of the inner plate fitting portion 40, the middle portion in the vertical direction, the upper portion, and the like.

As an example, the center plate fitting portion 40 has a center plate fitting main portion 40a extending substantially vertically along the up-down direction and a center plate fitting convex portion 40b projecting outward. A large portion of the entire middle plate fitting main portion 40a is located above the middle plate fitting convex portion 40b. That is, the middle plate fitting convex portion 40 b is positioned below the middle plate fitting portion 40 , and the middle plate fitting main portion 40 a is positioned above the middle plate fitting portion 40 . It is preferable that the middle plate fitting convex portion 40b is provided over the entire circumference. It is preferable that the cross-sectional shape of the middle plate fitting convex portion 40b is an arcuate cross-sectional view corresponding to the cross-sectional shape of the second fitting concave portion 14b. In particular, in a cross-sectional view cut in the vertical direction, it is preferable that the middle plate fitting convex portion 40b has a curved surface with substantially the same curvature as the second fitting concave portion 14b.

Further, the intermediate plate fitting portion 40 preferably has an intermediate plate curved portion 41 on the upper side of the intermediate plate fitting main portion 40a, that is, at the upper end portion of the intermediate plate fitting portion 40 . The middle plate curved portion 41 is connected to the upper side of the middle plate fitting main portion 40a. The middle plate curved portion 41 is curved outward along the vertical direction in a convex shape.

Further, in the present embodiment, the first middle plate extending portion 42 extends substantially horizontally outward from the middle plate curved portion 41, and the middle plate rising portion extends upward from the first middle plate extending portion 42. 43 extends, and the middle plate flange portion 32 is connected to the middle plate rising portion 43 . On the other hand, a second intermediate plate extending portion 44 is connected to the lower side of the intermediate plate fitting portion 40 . The second inner plate extending portion 44 extends substantially horizontally inward from the lower end of the inner plate fitting portion 40 . The height of the surrounding rib 36 preferably reaches the height of the second middle plate extending portion 44 , and furthermore, the height of the middle plate fitting portion 40 exceeds the height of the second middle plate extending portion 44 . preferably reaches the height of

The middle plate flange portion 32 preferably has a convex shape that protrudes upward. This convex shape is preferably provided over the entire circumference. The cross-sectional shape of the convex shape may vary. In the present embodiment, the middle plate flange portion 32 has a pressure-receiving convex portion 45 as a convex shape over the entire circumference. That is, the pressure-receiving convex portion 45 is ring-shaped, but the pressure-receiving convex portion 45 may be provided in plurality, for example, while being spaced apart in the circumferential direction. The pressure-receiving convex portion 45 is a pressure-receiving portion that is pushed downward by the lid 3 when the lid is closed. The pressure-receiving convex portion 45 is located outside and above the inner plate fitting portion 40 . Preferably, the pressure receiving convex portion 45 is positioned outside and above the first middle plate extending portion 42 . The cross-sectional shape of the pressure-receiving protrusion 45 is arbitrary, and may be an upwardly curved cross-sectional shape or a rectangular cross-sectional shape. That is, the top portion 45a of the pressure-receiving convex portion 45 may be flat or curved.

It is preferable to form a center plate edging portion 46 extending outward, for example horizontally or slightly downward, on the outer edge of the center plate flange portion 32 . The height of the rim portion 46 is lower than the height of the top portion 45 a of the pressure receiving convex portion 45 . It is preferable to form a large number of very fine irregularities in the outer region of the inner-outer width of the rim portion 46 of the inner plate, so that a reinforcing effect can be obtained and a finger cut can be prevented. The unevenness has a wavy shape when viewed from the front in an enlarged manner, and the direction in which the numerous peaks and valleys extend is the width direction (inner and outer directions). Further, the unevenness may be formed by, for example, flat knurling or twilled knurling, and it is particularly preferable to form by twilled knurling in order to prevent slippage.

It is preferable to provide an intermediate plate knob portion 47 on the outer edge of the intermediate plate flange portion 32 so that the intermediate plate 2 can be easily removed from the container body 1 . It is preferable that the intermediate plate knob portion 47 protrude radially outward from the outer edge of the intermediate plate flange portion 32 . The tip portion of the middle tray knob portion 47 may protrude further to the outside of the container than the main body flange portion 12 when the lid is closed. It is preferable that the middle plate knob portion 47 is provided at a position on the side opposite to the steam discharge direction on the entire circumference of the middle plate flange portion 32 . It is preferable that the position of the middle plate knob 47 is set so that the direction connecting the middle plate knob 47 and the steam discharge valve 35 is the steam discharge direction. The shape of the middle plate knob portion 4 is arbitrary, and may be, for example, a tongue shape. It is preferable that the middle plate knob 4 is provided with unevenness to make it less slippery, and it is also preferable that the portion that is touched by a finger is knurled. In addition to being provided on the outer edge of the intermediate plate flange portion 32, the intermediate plate knob portion 47 is provided, for example, on a portion of the intermediate plate bottom surface portion 30, a portion of the intermediate plate flange portion 32, and a portion of the intermediate plate side surface portion 31. The middle plate knob portion 47 may be formed by protruding upward.

<Lid 3>
The lid 3 is preferably transparent so that the food contained in the container can be visually recognized from the outside through the lid 3 . The lid 3 includes a lid top surface portion 50, a lid fitting portion 53 provided outside the lid top surface portion 50 and fitted inside the first body fitting portion 13, and provided outside the lid fitting portion 53. and a lid flange portion 54 . Preferably, the lid side surface portion 51 extends downward from the outer edge of the lid top surface portion 50 , and the lid extension portion 52 extends outward from the outer edge of the lid side surface portion 51 . It is preferable that a lid fitting portion 53 extends upward from the outer edge of the lid extending portion 52 and a lid flange portion 54 is formed from the upper end of the lid fitting portion 53 .

It is preferable to form a stacking convex portion 55 on the periphery of the lid top surface portion 50 to prevent the containers from being displaced when the containers with the lids closed are vertically stacked. The stacking protrusion 55 protrudes upward. The stacking convex portion 55 may extend along the peripheral portion of the lid top surface portion 50 . A pair of stacking projections 55 may be formed. The pair of stacking protrusions 55 may be symmetrical to each other and may be formed at positions facing each other 180 degrees.

When the lid is closed, as indicated by the two-dot chain line in FIG. It is preferable to wind vertically over the portion 10 . The strip-shaped label 4 is wound between a pair of stacking protrusions 55 . In addition, an inclined surface may be provided at the boundary between the lid top surface portion 50 and the lid side surface portion 51 to facilitate the winding of the belt-shaped label 4 .

The lid top surface portion 50 is provided with a steam discharge portion 56 for discharging the steam in the upper space to the outside of the container. The steam discharge part 56 may be a valve formed by a notch, or may be a through hole. In this embodiment, a plurality of long laser holes are formed as through holes. The vapor discharge portion 56 may have various configurations, and a passage as the vapor discharge portion may be provided in the lid side surface portion 51 instead of the lid top surface portion 50 .

The lid side surface portion 51 is provided with a lid projection 57 for preventing blocking in order to prevent a so-called blocking phenomenon in which the lids 3 are tightly fitted to each other and cannot be removed when a large number of the lids 3 are stacked at the time of collection. you can The lid projections 57 are arranged with their positions shifted for each lid 3 .

The lid extending portion 52 is a pressing portion that presses the inner tray 2 downward when the lid is closed. The lid extending portion 52 extends substantially horizontally, for example, along the in-and-out direction (radial direction). The lid extension 52 is preferably provided over the entire circumference. The lid extending portion 52 preferably presses the top portion 45a of the pressure-receiving convex portion 45 over the entire circumference when the lid is closed, but may be pressed at intervals in the circumferential direction. It is preferable that the lid extension portion 52 presses the top portion 45a of the pressure receiving convex portion 45 over the entire radial direction. Therefore, the radial dimension (width) of the lid extension portion 52 is preferably larger than the radial dimension of the top portion 45 a of the pressure receiving convex portion 45 .

The lid fitting portion 53 has, like the inner plate fitting portion 40, a fitting convex portion protruding radially outward on its outer surface. The cross-sectional shape of the fitting protrusion may be various, and for example, it is preferable that the shape bulges outward in an arcuate shape or a trapezoidal shape in a cross-sectional view. The position of the fitting convex portion may be various, such as the lower portion of the lid fitting portion 53, the middle portion in the vertical direction, the upper portion, and the like.

As an example, as shown in FIGS. 2 to 4, the lid fitting portion 53 has a lid fitting main portion 53a extending substantially vertically along the vertical direction and a lid fitting projection portion 53b projecting outward. is doing. Most of the entire lid-fitting main portion 53a is located above the lid-fitting convex portion 53b. That is, the lid-fitting protrusion 53b is located below the lid-fitting portion 53, and the lid-fitting main portion 53a is located above the lid-fitting portion 53. As shown in FIG.

It is preferable that the lid fitting convex portion 53b is provided over the entire circumference. The cross-sectional shape of the lid fitting projection 53b is preferably an arcuate cross-sectional view corresponding to the cross-sectional shape of the first fitting recess 13b. In particular, in a longitudinal cross-sectional view, it is preferable that the lid fitting convex portion 53b has a curved surface with substantially the same curvature as that of the first fitting concave portion 13b. The middle plate fitting projection 40b is preferably larger than the lid fitting projection 53b. The vertical length of the middle plate fitting projection 40b is preferably longer than the vertical length of the lid fitting projection 53b. It is preferably larger than the amount of projection of the joint projection 53b. The vertical length of the lid fitting main portion 53a is preferably longer than the vertical length of the inner tray fitting main portion 40a.

Furthermore, the lid fitting portion 53 preferably has a lid curved portion 58 on the upper side of the lid fitting main portion 53 a , that is, at the upper end portion of the lid fitting portion 53 . The lid curved portion 58 is connected to the upper side of the lid fitting main portion 53a. The lid curved portion 58 is curved outward in the up-down direction in the same manner as the inner plate curved portion 41 . The vertical length of the lid curved portion 58 is preferably longer than the vertical length of the inner plate curved portion 41 .

The shape of the lid flange portion 54 is arbitrary, but in this embodiment, it extends substantially horizontally outward from the upper end of the lid curved portion 58 . As shown in FIG. 1, the outer edge of the lid flange portion 54 may be provided with a lid knob portion 59 for facilitating the operation of opening the lid 3 . The outer edge of the lid flange portion 54 may be formed with a large number of very fine irregularities to reinforce it and prevent a finger from being cut even if it hits it. The unevenness may be formed only on the outer edge side of the lid flange portion 54 or may be formed over the entire width of the lid flange portion 54 . The unevenness has a wavy shape when viewed enlarged from the front, and the directions of many peaks and valleys are along the inside and outside directions of the container. Further, the unevenness is formed by, for example, flat knurling or twilled knurling, and is preferably formed by twilled knurling in order to prevent slippage.

For the container body 1, the inner plate 2, and the lid 3, synthetic resin sheets such as polyethylene terephthalate, polystyrene, and polyolefins such as polypropylene and polyethylene, which are heat-resistant and can be used in microwave ovens, can be used. . As these sheet materials, a sheet obtained by dispersing an inorganic substance in the synthetic resin described above, a foamed sheet obtained by foaming the synthetic resin described above, or a stretched sheet obtained by stretching the above-described sheet can be used. Among these, heat-resistant foamed styrene resin sheets using heat-resistant styrene-based resin with excellent heat resistance as polystyrene, sheets made by expanding inorganic substances dispersed in polypropylene with excellent heat resistance, polyethylene terephthalate, A heat-resistant sheet obtained by stretching a sheet of polypropylene, polyethylene, or the like to improve heat resistance can be used and thermoformed.

In particular, among these sheets, when a sheet having excellent transparency is used for the lid 3, it is preferable because the stored food can be visually recognized. Among them, a uniaxially or biaxially oriented stretched sheet of transparent polyethylene terephthalate, polystyrene, polypropylene, or the like is preferable because it has heat resistance necessary for heating in a microwave oven.

The container body 1 is preferably obtained by thermoforming a sheet using a heat-resistant resin material. Since the container body 1 is heated in a microwave oven for use, it is particularly preferable to use a foamed heat-resistant resin material. A heat-resistant foamed styrene resin sheet is preferable because it can suppress electromagnetic waves from a microwave oven, efficiently transmit electromagnetic waves to food stored therein, heat the food uniformly and in a short period of time, and has excellent heat retention. . In addition, the inner plate 2 is preferably made of a sheet having excellent heat resistance because it is directly exposed to the steam of the heated soup, and preferably made of a uniaxially or biaxially oriented polypropylene sheet. Moreover, it is preferable to use a polystyrene sheet (OPS) for the lid 3, because the OPS has a larger contact angle than the polyethylene terephthalate sheet, and the liquid is less likely to leak out from the vapor exhaust portion 56 to the outside.

<Lid closed state>
In the operation of closing the lid, first, the container main body 1 contains the first food material, and then the middle plate 2 is attached. FIG. 3 shows the mounting state of the inner plate in which only the inner plate 2 is attached to the container body 1. As shown in FIG. Also, FIG. 4 shows the closed state. The inner plate 2 is internally fitted into the second body fitting portion 14 of the container body 1 . The second middle plate extending portion 44 abuts on the third step portion 15 or faces the upper side of the third step portion 15 with a slight gap therebetween. Preferably, the outer edge of the second middle plate extending portion 44 , that is, the lower end of the middle plate fitting portion 40 abuts on the third step portion 15 . The middle plate fitting projection 40b fits into the second fitting recess 14b, and the middle plate fitting main portion 40a fits into the second main body fitting main portion 14a. When the middle plate 2 is attached to the container body 1, the middle plate fitting convex portion 40b descends while sliding on the second main body fitting main portion 14a, and eventually fits into the second fitting concave portion 14b. Therefore, when the middle plate fitting convex portion 40b is fitted into the second fitting recess portion 14b, a click feeling is transmitted to the operator's hand, and the click feeling causes the worker to mount the middle plate 2 to the proper position. You can know what you can do. Even if the middle plate 2 is strongly pushed, the third step portion 15 functions as a stopper and the second middle plate extending portion 44 abuts against the third step portion 15. The lowering of the plate 2 is prevented, and the middle plate 2 can be reliably stopped at the regular position. Further, if the middle plate fitting convex portion 40b and the second fitting concave portion 14b have curved surfaces with substantially the same curvature, there will be surface contact therebetween, and the fitting strength will be further increased.

In addition, the middle plate curved portion 41 contacts the main body curved portion 16 from the inside. Preferably, the middle plate curved portion 41 is in annular line contact with the main body curved portion 16 along the circumferential direction. That is, the middle plate curved portion 41 makes point contact with the main body curved portion 16 in a cross-sectional view. The main body curved portion 16 is curved upward and downward, and the inner plate curved portion 41 is curved outward and convex along the vertical direction. Therefore, in a cross-sectional view, the middle plate curved portion 41 can reliably make point contact with the main body curved portion 16 from the inside and obliquely upward. When the middle plate curved portion 41 contacts the main body curved portion 16 in this manner, the middle plate curved portion 41 is pressed against the main body curved portion 16 with a strong pressure, and the middle plate curved portion 41 and the main body curved portion 16 are separated. The contact becomes reliable, and the internal fitting force between the container body 1 and the inner plate 2 is enhanced.

Also, the first inner plate extending portion 42 may face the upper side of the second step portion 17 with a slight gap, but preferably abuts on the second step portion 17 . More preferably, the outer edge of the first middle plate extending portion 42 , that is, the lower end of the middle plate rising portion 43 abuts on the second step portion 17 . When the middle plate 2 is attached to the container body 1, if the first middle plate extending portion 42 comes into contact with the second step portion 17, further descent of the middle plate 2 is prevented, and the middle plate 2 is moved to the normal position. can be reliably stopped. The middle plate rising portion 43 faces the inside of the main body rising portion 18 with a space therebetween. The middle plate flange portion 32 abuts on the first step portion 19 . Preferably, the middle plate flange portion 32 is elastically deformed upward by coming into contact with the first step portion 19 . In addition, preferably, as will be described later, the inner plate flange portion 32 is pushed downward by the lid extension portion 52 so as to be strongly pressed against the first step portion 19. is pressed against the first step portion 19 .

The lid extension portion 52 abuts on the middle plate flange portion 32 . Preferably, the lid extending portion 52 presses the inner plate flange portion 32 downward, and particularly presses the pressure receiving convex portion 45 of the inner plate flange portion 32 downward, and elastically deforms it. push down. The lid fitting projection 53b fits into the first fitting recess 13b, and the lid fitting main portion 53a fits into the first body fitting main portion 13a. When the lid 3 is attached to the container body 1, the lid fitting projection 53b descends while sliding on the first body fitting main portion 13a, and eventually fits into the first fitting recess 13b. Therefore, when the lid fitting convex portion 53b is fitted into the first fitting concave portion 13b, a click feeling is transmitted to the operator's hand, and the operator can attach the lid 3 to the proper position by the click feeling. can know. Further, when the lid fitting projection 53b and the first fitting recess 13b have curved surfaces with substantially the same curvature, there is surface contact therebetween, and the fitting strength is further increased.

The lid curved portion 58 contacts the bead portion 20 of the body flange portion 12 from the inside. Preferably, the lid curved portion 58 is in annular line contact with the bead portion 20 along the circumferential direction. That is, the lid curved portion 58 makes point contact with the bead portion 20 in a cross-sectional view. The bead portion 20 is curved upwardly convex along the inside-outside direction, and the lid curved portion 58 is curved outwardly convex along the up-down direction. Therefore, in a cross-sectional view, the lid curved portion 58 can reliably make point contact with the bead-shaped portion 20 from the inside and obliquely above. When the lid curved portion 58 contacts the bead portion 20 in this way, the lid curved portion 58 is pressed against the bead portion 20 with a strong pressure, and the lid curved portion 58 and the bead portion 20 are separated. The contact becomes reliable, and the internal fitting force between the container body 1 and the lid 3 is enhanced.

The lid flange portion 54 abuts on the main body flange portion 12 or faces the upper side of the main body flange portion 12 with a space therebetween. In this embodiment, the lid flange portion 54 faces the upper side of the beaded portion 20 of the body flange portion 12 with a space therebetween, but may be in contact therewith.

The mounting process of the inner plate 2 to the container body 1 and the mounting process of the lid 3 to the container body 1 will be further described in detail. 2, 9 and 10 show a state in which the inner plate 2 is attached to the container body 1. As shown in FIG. When the inner plate 2 is attached to the container body 1, the outer edge of the inner plate flange portion 32 should be positioned slightly below the first step portion 19 as shown in FIG. ing. Therefore, when the outer edge of the middle plate flange portion 32 comes into contact with the first step portion 19, the middle plate flange portion 32 is elastically deformed upward and inward as indicated by the arrow in FIG. The state is as shown in FIG. When the middle plate flange portion 32 is elastically deformed, the middle plate flange portion 32 strongly hits the first step portion 19 due to its elastic restoring force, and the middle plate flange portion 32 hits the first step portion 19 all the way around. It will surely contact and adhere to the entire surface. In particular, when the first intermediate plate extending portion 42 is in contact with the second step portion 17 in a state in which the intermediate plate 2 is attached to the container body 1 , the intermediate plate flange portion 32 is positioned above the intermediate plate rising portion 43 . It elastically deforms upward and inward with the lower end as a fulcrum. Even if the middle plate flange portion 43 comes into contact with the first step portion 19 and is elastically deformed, the inner fitting state of the middle plate 2 is maintained because the middle plate fitting projection 40b is fitted into the second fitting recess 14b. is maintained without being released.

In this way, in the middle plate mounting state in which only the middle plate 2 is fitted inside without the lid 3 being mounted on the container body 1, the middle plate flange portion 32 is in contact with the first step portion 19. , the first inner plate extending portion 42 is in contact with the second step portion. Therefore, the attachment state of the inner plate 2 to the container body 1 is stable and strong. Moreover, since the middle plate flange portion 32 is strongly pressed against the first step portion 19 by the elastic restoring force of the middle plate flange portion 32, the mounting state of the middle plate 2 is further stabilized.

The lid 3 is further attached to the container main body 1 in such a state in which the inner plate is attached. 3, 11 and 12 show a state in which the lid 3 is attached to the container body 1. As shown in FIG. When the lid 3 is attached to the container main body 1, the lid extension portion 52 should be more likely than the inner plate flange portion 32, particularly the pressure receiving convex portion 45 of the inner plate flange portion 32, as shown in FIG. It is set to be slightly lower. Therefore, the lid extension portion 52 pushes the pressure receiving convex portion 45 downward. Since the outer edge of the middle plate flange portion 32 is in contact with the first step portion 19 and the first middle plate extension portion 42 is in contact with the second step portion 17, the middle plate flange portion 32 is positioned downward. cannot be avoided. Therefore, when the pressure receiving convex portion 45 is pushed by the lid extension portion 52, the inner plate flange portion 32, particularly the pressure receiving convex portion 45, is elastically deformed downward as shown in FIG. At the same time, the outer edge of the middle plate flange portion 32 is further pressed against the first step portion 19 . Therefore, the middle plate flange portion 32 is strongly adhered to the first step portion 19 over the entire circumference. Further, the pressing force by which the lid extension portion 52 presses the pressure receiving convex portion 45 downward is transmitted to the first middle plate extension portion 42 via the middle plate rising portion 43, and the first middle plate extension portion 42 is strongly pressed against the second step portion 17 . Therefore, the first inner plate extending portion 42 is strongly adhered to the second step portion 17 .

When the lid extending portion 52 pushes down the pressure receiving convex portion 45, the lid extending portion 52 receives an upward reaction force from the pressure receiving convex portion 45. 13b, the inner fitting state of the lid 3 is not released, and the lid closed state is reliably maintained.

In such a container, for example, soup is placed in the lower space, and noodles for cooking are placed in the upper space. In that case, the soup is put into the container body 1 first, and then the inner plate 2 is attached to the container body 1.例文帳に追加Then, the noodles for cooking are put on the inner plate 2, and the lid 3 is attached to the container body 1. - 特許庁The user can put the container in the microwave oven with the lid closed to heat and cook the food contained therein. By heating with a microwave oven, the soup in the lower space is warmed, steam is generated, and the pressure in the lower space rises. When the pressure in the lower space increases, the steam discharge valve 35 opens upward, and the steam in the lower space is discharged through the steam discharge valve 35 to the upper space. Further, when the steam exhaust valve 35 is provided with a C-shaped, J-shaped, M-shaped notch, etc., a large amount of steam gathers in the opening direction (steam exhaust direction) of the steam exhaust valve 35 . Therefore, in this case, the steam discharge valve 35 concentrates and discharges the steam in one direction, that is, in the steam discharge direction. The steam discharged from the steam discharge valve 35 is discharged from the rib inner space through the notch 37 of the surrounding rib 36 to the outside of the rib inner space and spreads to the upper space. Then, the steam in the upper space is discharged to the outside of the container through the steam discharge portion 56 .

When the cooking is completed, the lid knob 59 is held to remove the lid 3 from the container body 1, and the middle plate knob 47 is pulled up. The middle plate 2 is tilted while removing the middle plate 2 from the container body 1 by pulling up the middle plate knob 47, and the noodles for cooking are put into the soup in the container body 1 and eaten by sliding them off the middle plate 2. - 特許庁be able to.

As described above, the middle plate 2 may be loaded with heavy noodles for cooking. However, even in this case, since the surrounding rib 36 is provided at the central portion of the inner plate bottom portion 30, the inner plate 2 is less likely to bend. Therefore, the inner fitting state between the inner plate 2 and the container body 1 is maintained, and the soup is prevented from leaking out.

In addition, the inner plate flange portion 32 is strongly in contact with the first step portion 19 due to its elastic restoring force, and is also pressed against the first step portion 19 by the lid extension portion 52 from above. It is difficult to leak into the upper space through between the disk flange part 32 and the container body 1. - 特許庁That is, while the lid extension portion 52 presses the pressure receiving convex portion 45 downward, the first step portion 19 supports the middle plate flange portion 32 from below, so that the middle plate flange portion 32 is extended from the lid extension portion. It is held vertically between 52 and the first step portion 19 . This further stabilizes the mounting state of the inner plate. In addition, since the second step portion 17 supports the first inner tray extension portion 42 from below, the lid extension portion 52 presses the pressure receiving projection 45 downward. The first middle plate extending portion 42 is held vertically by the lid extending portion 52 and the second step portion 17 via the middle plate rising portion 43 . This further stabilizes the mounting state of the inner plate.

In this manner, after the middle plate fitting convex portion 40b is fitted into the second fitting recess portion 14b, the first middle plate extending portion 42 is attached to the second step portion 17 at the outer and upper position thereof. Further, at the outer and upper positions thereof, the middle plate flange portion 32 is in close contact with the first step portion. Therefore, the inner fitting state of the inner tray 2 to the container body 1 is further stabilized.

During cooking, the fitting state of the inner plate 2 to the container body 1 is maintained, and the steam filling the lower space provides a steaming effect, enabling cooking in a short time. During cooking, the surrounding ribs 36 protruding upward are provided around the steam discharge valve 35, so even if the noodles for cooking are placed on the inner plate 2, the steam discharge valve 35 may be opened due to the weight of the noodles for cooking. is not deformed, the steam exhaust valve 35 can reliably open upward and exhaust the steam. In addition, since the notch 37 is formed in the enclosing rib 36, the steam does not stay in the space inside the rib, and the steam smoothly discharges from the space inside the rib to the outside of the enclosing rib 36 through the notch 37. be done. Furthermore, the steam thus discharged to the second space above the inner plate 2 is discharged to the outside of the container through the steam discharge portion 56 of the lid 3 .

When putting the noodles for cooking on the middle plate 2 into the soup in the container main body 1 after the heat cooking, the middle plate knob 47 provided on the opposite side of the middle plate 2 to the direction of steam discharge is lifted up. By inclining 2, the noodles for cooking can be easily slid in the direction of steam discharge and put into the soup. When the steam discharge valve 35 is provided with a C-shaped, J-shaped, M-shaped cut, etc., the steam containing the soup gathers more in the steam discharge direction and less on the side opposite to the steam discharge direction. Therefore, by having the middle plate knob 47 located on the side opposite to the steam discharging direction, the soup is less likely to stick to the hands, and the noodles for cooking can be hygienically and comfortably slid down into the soup.

In addition, since the one-way uneven portion 39 extending in the steam discharge direction is provided on the upper surface of the inner plate bottom portion 30, the noodle ingredients for cooking slide easily along the steam discharge direction, and the cooking noodles can be easily steam discharged. You can slide it in any direction and put it in the soup.

In addition, when the inner plate fitting portion 40 or the lid fitting portion 53 has a fitting convex portion, the upper or lower side of the fitting convex portion is not a straight portion, but is directed inward along the vertical direction. A configuration having a curved portion may be employed.

1 container body 2 middle plate 3 lid 4 strip label 10 body bottom portion 11 body side face portion 12 body flange portion 13 first body fitting portion 13a first body fitting main portion 13b first fitting concave portion 14 second body fitting Part 14a Second body fitting main part 14b Second fitting recess 15 Third step part 16 Body curved part 17 Second step part 18 Body rising part 19 First step part (step part)
20 Beaded portion 21 Main body edging portion 30 Middle plate bottom portion 31 Middle plate side surface 32 Middle plate flange portion 33 Leg portion 34 Middle plate convex portion 35 Steam discharge valve 36 Surrounding rib 36a First half region 36b Second half region 37 Notch portion 38 Flat surface portion 39 One-way uneven portion 40 Middle plate fitting portion 40a Middle plate fitting main portion 40b Middle plate fitting convex portion 41 Middle plate curved portion 42 First middle plate extending portion (extending portion)
43 Middle plate rising portion 44 Second middle plate extending portion 45 Pressure-receiving convex portion (pressure-receiving portion)
45a Top portion 46 Middle plate edge portion 47 Middle plate knob portion 50 Lid top surface portion 51 Lid side surface portion 52 Lid extension portion (pressing portion)
53 Lid fitting portion 53a Lid fitting main portion 53b Lid fitting convex portion 54 Lid flange portion 55 Stacking convex portion 56 Steam discharge portion 57 Lid convex portion 58 Lid curved portion 59 Lid knob portion P Steam discharge direction

Claims (5)

A container for a microwave oven in which an inner plate and a lid are fitted inside a container body,
The container body has a first fitting recess that is recessed outward, and a second fitting recess that is recessed outward and provided below and inside the first fitting recess,
The middle plate protrudes outward and has a middle plate fitting convex portion that fits inside the second fitting concave portion in the closed state, and a pressure receiving portion that is provided outside the middle plate fitting convex portion. have
The lid includes a top surface portion, a lid fitting projection provided outside the top surface portion and fitted inside the first fitting recess in the closed state, and a lid fitting projection provided between the top surface portion and the lid fitting projection. and a pressing portion that presses the pressure receiving portion downward when the lid is closed. The middle plate has a middle plate flange portion provided outside the middle plate fitting convex portion, and the middle plate flange portion is provided with a pressure receiving convex portion projecting upward as a pressure receiving portion. 2. The container for microwave ovens according to 1. 3. The microwave oven container according to claim 2, wherein the container body has a step portion below the first fitting recess, and the step portion supports the inner plate flange portion from below when the lid is closed. The container body has a second step portion below and inside the step portion,
The middle plate has an extension portion extending inward and outward between the middle plate fitting convex portion and the middle plate flange portion,
4. The container for a microwave oven according to claim 3, wherein the second step portion supports the extension portion from below when the lid is closed. In a state where the lid is opened and the middle plate is fitted inside the container body, the middle plate flange portion and the extension portion are in contact with the step portion and the second step portion, respectively. Microwavable container as described.

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