JP2007301000A - Container for microwave oven cooking - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container for microwave oven cooking with stable quality, capable of efficiently and safely cooking a foodstuff deliciously, without reducing nutrition, and without staining the outer periphery of the container or inside a microwave oven. <P>SOLUTION: The container for microwave oven cooking comprises a flanged bottom container 1 for storing a foodstuff, a flanged upper lid 2 engaged with the bottom container 1, and a flanged cap 3 engaged with the upper lid 2. Stoppers 1d and 2d are attached to the engagement part between an upper cylindrical inner peripheral part 1c of the bottom container 1 and a lower cylindrical outer peripheral part 2d of the upper lid 2, and stoppers 2f and 3f are attached to the engagement part between an upper cylindrical inner peripheral part 2e of the upper lid 2 and a cylindrical outer peripheral part 3e of the cap 3. In the plastic-molded container for microwave oven cooking, an open/close part for discharging steam is formed by closely attaching the upper part of the upper lid 2 to the flange 3a of the cap 3, so that the steam is discharged from a gap formed between the upper part of the upper lid 2 and the flange 3a of the cap by swelling/deforming the upper lid 2 with the steam pressure inside the container. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a container for cooking various foods such as fresh foods, noodles, and side dishes with a microwave oven.

Food containers for microwave ovens are simple things that can be stored and transported by sealing the ingredients, and can be cooked in a short time. When cooking, it is important that the steam pressure is automatically controlled so that the seasoning liquid in the container does not leak outside the container, and the inside of the microwave oven or the outer periphery of the container is not soiled. Furthermore, in order to cook deliciously and efficiently, without reducing nutrients as much as possible, it is necessary to keep the container tightly sealed during cooking, to quickly raise the temperature of the ingredients, and to control the internal pressure of the container with a higher vapor pressure. is there. To that end, it is essential to ensure the accuracy of each part of the container.
It is also important that each part of the container has good moldability, stable quality, and low cost production.
There exists a container of patent document 1 as an example of the conventional food container for microwave ovens.
JP 2004-305716 A

However, in the container of Patent Document 1, since the lid upper wall portion 11b1 is set larger than the cap engaging portion 12c and the cap can be moved by steam pressure during cooking, the inside of the container is cap-related. Only a very small pressure is generated by a very small resistance of + α due to friction between the joint and the upper wall of the lid. When the vapor pressure generated when the temperature rises exceeds the above-mentioned minute pressure, the cap moves and starts to leak in a large amount from the vapor discharge groove, so that the heat energy is lost and the temperature rise of the food and seasoning liquid is delayed.
In addition, since the lid body is moved by the vapor pressure between the lid lower portion engaging portion 13c and the main body container 9c, a gap with the main body container is required, and steam leakage also occurs from this part. As a result, the temperature rise of the ingredients and seasoning liquid becomes even slower, and depending on the ingredients, there may be cases where optimum cooking is not possible.

In addition, since the steam leaks between the lid lower portion engaging portion 13c and the main body container 9c, the outer periphery of the container main body may get wet, and there is a risk of slipping and burning when taking out from the microwave oven.
And restraining the movement of the cap to increase the vapor pressure in the container results in a further increase in the amount of vapor in the container that leaks from between the main body container and the lid body, so there is a problem of sliding and burning. Increase
Furthermore, since the lid body is complicated by being provided with a plurality of step-like steam discharge grooves, it is difficult to ensure mold accuracy, and it is difficult to ensure molding accuracy of the lid body. In particular, the engaging (fitting) portion of the lid with the cap is deformed by being taken by a mold, and the moldability is poor, and the quality is not stable, so the cost increases.

Generally, in order to cook food efficiently in a microwave oven container without reducing the nutrients in the food, it is necessary to quickly raise the temperature of the food, seasoning liquid and water and heat it at the appropriate temperature and time. is necessary.
As one of the methods, by reducing steam leakage in the container, the steam generated by heating is properly kept in the container, the temperature of ingredients, seasoning liquid and water is raised quickly, and steaming effect by steam is also added There is a way to get.
In addition, for boiled fish and rice porridge, etc., where the seasoning liquid and broth are likely to spill when heated, the steam pressure rises rapidly as the seasoning liquid and broth boil and foam, resulting in spilling. It is necessary to quickly discharge the steam with an appropriate steam pressure to prevent the food from being cooked and the outer periphery of the container and the inside of the microwave oven from being soiled.

Therefore, when the rise in the vapor pressure in the container is slow, in order to reduce the steam leakage, the fitting gap between each component of the bottom container and the upper lid and between the upper lid and the cap is made as small as possible, and dimensional accuracy is ensured. Control is required to reduce variation and to discharge steam little by little at an appropriate steam pressure.
In addition, when the vapor pressure in the container suddenly rises, the steam is discharged immediately at an appropriate height, so that the pressure is detected at an appropriate height and the operation loss of the parts when the steam is released. In order to increase the pressure detection accuracy and reduce the operating loss, the fitting gap between the parts of the bottom container, the top lid and the cap can be reduced, and the dimensional accuracy of each part can be reduced. Ensuring and reducing variation is an issue.
Furthermore, in order to safely remove the cooked container from the microwave oven, the steam leakage from between the bottom container and the top lid is reduced, the wetting around the container handle by water vapor is reduced, and the container slides from the hand. It is also necessary to prevent this.

  Therefore, in view of the above points, the present invention has a stable quality of a microwave cooking container that can be cooked safely and efficiently without sacrificing the ingredients, without reducing nutrients, and without contaminating the outer periphery of the container or the inside of the microwave oven. It aims at providing at low cost.

The present invention includes a flanged bottom container for storing food, a flanged top lid for fitting with the bottom container, and a flanged cap for fitting with the top lid, and the upper cylindrical inner peripheral portion of the bottom container and the top lid A plastic-molded electronic device in which a retaining portion is provided at a fitting portion with a lower cylindrical outer peripheral portion, and a retaining portion is provided at a fitting portion between the upper cylindrical inner peripheral portion of the upper lid and the cylindrical outer peripheral portion of the cap. In the range cooking container,
An upper and lower portions of the upper lid and the cap flange are in close contact to form a steam discharge opening / closing portion, and a gap is formed between the upper lid upper portion and the cap flange due to the bulging deformation of the upper lid due to the vapor pressure in the container. The above-mentioned problems have been solved by a microwave cooking container characterized by generating steam and discharging steam.

According to the microwave cooking container of claim 1 of the present invention,
A steam discharge opening / closing part is constructed by bringing the upper surface of the upper lid into close contact with the flange of the cap. The upper lid swells and deforms due to the vapor pressure in the container, and steam is generated by generating a gap between the upper portion of the upper lid and the flange of the cap. Therefore, the fitting portion between the bottom container and the upper lid does not require a gap for moving the upper lid, and as a result, the steam leakage is reduced. In addition, most of the pressure applied to the upper lid is used to elastically deform the entire upper lid surface, so that the displacement of the steam discharge opening / closing part can be increased, and the pressure setting can be made accurate even when the vapor pressure rises slowly. Can do.
In addition, the elastic deformation of the top lid is used to open and close for steam discharge, so there is no unstable factor such as friction loss due to movement of the cap or top cover, so steam discharge at an appropriate pressure can be accurately stabilized. Can be achieved.

As a specific heating process, microwaves are applied to the food, seasoning liquid, and water in the container to heat and generate water vapor, and the air in the container is expanded to a high temperature. The expanded air and water vapor (hereinafter referred to as “water vapor”) raise the pressure inside the container above the pressure outside the container.
When the pressure in the container rises, steam leakage is suppressed at the mating surface of the fitting part between the bottom container and the top lid and the flange. At that time, the cap is set so that the cap of the top lid does not exceed the cap of the bottom container, and the cap of the cap does not exceed the cap of the top lid. Is elastically deformed to open a gap between the steam discharge opening / closing portion sandwiched between the upper surface of the upper lid and the flange of the cap, and discharge steam.
And by discharging | emitting vapor | steam, since the pressure inside a container and the outside of a container become substantially the same, or the pressure in a container will be in a slightly higher state, a clearance gap is closed by the elasticity of an upper cover. During heating, the opening and closing of the gap and steam discharge are repeated.

According to the microwave oven container of claim 2 of the present invention,
When the pressure inside the container suddenly rises, the cap prevention exceeds the top lid prevention, creating a large gap between the top of the top lid and the cap flange, and discharging a large amount of steam at once. If the pressure rises suddenly, the pressure on the cap also rises rapidly, exceeding the cap and top cap retaining force, and the cap retaining cap exceeds the top cap retaining cap, and the steam between the cap flange and the top lid top A large gap is formed in the discharge opening / closing section, and the steam is discharged at once, and the pressure can be quickly reduced before the spill occurs.

Furthermore, according to the microwave oven container of claim 3 of the present invention,
Since the upper cylindrical inner periphery with the same or slightly larger dimensions than the upper cap maximum retaining diameter of the cap is provided above the upper cap minimum retaining portion of the upper lid with respect to the cap retaining maximum diameter portion, the upper cylinder of the upper lid The undercut part on the part molding formed between the stopper provided on the inner periphery of the shape and the bottom of the cylinder can be forcibly removed, and mass production and molding can be performed with stable quality. When the food, seasoning liquid, or water boils and the pressure in the container suddenly increases, the cap can be removed from the stopper to prevent spilling and the cap can be prevented from coming off.
In addition, when the vapor pressure rises rapidly, the cap may pop out from the upper lid. However, by making the upper lid smaller than the cap retaining portion near the upper surface, the pop-out can be prevented.

According to the present invention of claim 4,
The upper cover's upper stopper and the cap's stopper are engaged in the vertical engagement width. The cap's engagement width is the same as or slightly larger than the upper cover's engagement width. Due to the elastic stress of the cap engaging portion and the upper lid engaging portion, the cap and the upper lid are brought into close contact with each other, so that steam leakage from the upper lid and cap engaging portion when the temperature rises can be reduced, and the temperature inside the container rises. The speed can be increased and the vapor pressure can be increased.

According to the invention of claim 5,
The top cover engagement width is the same as or slightly larger than the bottom container engagement width when the bottom container retainer and top cover bottom retainer are engaged. The upper lid and the bottom container are in close contact with each other due to the elastic stress of the upper lid engaging portion and the bottom container engaging portion, so that the steam leakage from the upper lid and bottom container engaging portion when the temperature rises can be reduced. It is possible to increase the temperature rise rate and increase the steam pressure.
Further, since the outer periphery of the container does not slip when the hand gets wet, it is possible to prevent danger when taking out the container from the microwave oven and contamination in the microwave oven.

According to the present invention of claim 6,
Since the top lid flange is received by the top surface of the bottom container, the bottom lid bottom stopper and the bottom container bottom latch are engaged, and the top lid flange is subjected to elastic deformation stress to hold the top lid to the bottom container. Due to the elastic stress of the flange, the top lid flange and the top surface of the bottom container are brought into close contact with each other, so that steam leakage from between the bottom container and the top lid when the temperature rises can be reduced. The pressure can also be increased. Further, since the outer periphery of the container does not slip when the container gets wet, it is possible to prevent dangers such as taking out the container from the microwave oven, and contamination in the microwave oven.

According to the present invention of claim 7,
Since the upper surface of the upper lid facing the flange of the cap is provided with a plurality of opening holes for steam discharge, there is no complicated shape of the steam discharge groove, and the cylindrical shape of the upper cover is simple, so that the mold can be easily manufactured. In addition, since the mold release resistance is small, there is no problem such as removal during molding, and there is no deformation. In addition, since the quality and accuracy of the fitting portion are increased, it is easy to ensure airtightness in the container, and the fitting portion can be manufactured so as not to leak steam.
As described above, a high-quality and low-cost container can be provided.

According to the present invention of claim 8,
A nearly half-moon shaped steam outlet formed between the upper cylindrical inner periphery of the top lid and the almost linear part of the cylindrical outer periphery of the cap is provided, so multiple stepped grooves are required for steam discharge However, the upper cylindrical inner periphery of the upper lid and the horizontal cross section of the retainer are formed by circles, and the cylindrical outer periphery of the cap and the horizontal cross section of the retainer are simple shapes formed by substantially straight lines and circles. The mold is easy to manufacture, and the resistance to release from the mold due to mold shrinkage is small, so it is possible to manufacture a highly accurate upper lid and cap that do not deform at low cost.
In addition, since there is little deformation of the upper surface of the upper lid and the flange of the cap and the adhesion is improved, it is easy to ensure airtightness in the container, and the effect of preventing steam leakage is great. In addition, since the fitting accuracy between the upper lid and the cap is good, the degree of force that the cap prevention exceeds the upper lid prevention of the upper lid is stabilized, and an appropriate vapor pressure can be accurately controlled.

Finally, the invention of claim 9
Since the thin hinge that operates by steam pressure is provided on the upper surface of the top lid facing the cap flange, the gap between the top lid and the cap flange is used when the steam pressure rises rapidly by utilizing the low rigidity of the thin hinge. A large amount of steam can be discharged at once.

Hereinafter, embodiments of the present invention will be described.
1 to 6 and FIGS. 9 to 11 show a first embodiment of the present invention.
1 is a cross-sectional view of the basic configuration, FIG. 2 is a top view, FIG. 3 is a top view of the upper lid, FIG. 4 is a cross-sectional view of a steam discharge state when the steam pressure rises slowly, and FIG. FIG. 6 is a partial cross-sectional view of the bottom container and the top lid retaining portion, FIG. 9 is an enlarged cross-sectional view of the top lid and cap, and FIG. FIG. 11 is an enlarged cross-sectional view of the steam discharge state when the steam pressure rapidly increases.

As shown in FIGS. 1 to 5, the bottom container 1 formed of an elastic plastic and having a thin wall thickness prevents the food storage part 1 m and the cylindrical inner peripheral part 1 c provided on the top of the storage part 1 m from retaining 1 d. The flange 1a was provided in the upper part of the cylindrical inner peripheral part 1c, and a handle 1k was provided by extending a part of the flange 1a horizontally.
The upper lid 2 is provided with a flange 2 a and a handle 2 k having substantially the same shape as the flange 1 a and the handle 1 k of the bottom container 1, and is in close contact with the bottom container 1. A lower cylindrical outer peripheral portion 2c having a cylindrical inner peripheral portion 1c of the bottom container 1 and a retaining stopper 2d fitted to the retaining stopper 1d is provided at the lower portion of the flange 2a. Further, the upper surface 2b forming the upper space 2m of the lower cylindrical outer peripheral portion 2c has a steam discharge hole 2g, and the lower portion of the upper surface 2b has the upper and lower portions of the cylinder having substantially the same dimensions and a retaining member 2f. An upper cylindrical inner peripheral portion 2e is provided, and a bottom opening hole 2j is opened in the cylindrical bottom 2h.

The vertical dimension between the stopper 2f of the upper lid 2 and the upper surface 2b is substantially the same as or slightly larger than the dimension from the stopper of the cap 3 to the lower surface of the flange 3a. 3a is stuck.
To assemble the container with ingredients, the cap is inserted into the upper lid using the elastic deformation of the cap and the upper lid, and the upper lid into which the cap has been inserted is preliminarily placed with the ingredients using the elastic deformation of the upper lid and the bottom container. 1 is inserted.

As shown in FIG. 1, the cap 3 is in close contact with the upper surface 2b of the upper lid 2, covers the vapor opening hole 2g, and receives the vapor pressure in the container. In addition, a flange 3a for opening and closing steam discharge is provided between the upper surface 2b of the upper lid 2 and the flange 3a has a protrusion 3n that increases the rigidity of the flange 3a and prevents deformation due to steam pressure. A cylindrical outer peripheral part 3e and a retaining part 3f that are fitted into the upper cylindrical inner peripheral part 2e and the retaining part 2f of the upper lid 2, respectively, and a hemispherical cylindrical bottom 3h that receives vapor pressure are provided.
As shown in FIG. 4, the vapor pressure in the container is applied to the inner periphery of the bottom container 1, the inner periphery of the upper lid 2, and the tube bottom 3 h of the cap 3.
As shown in FIG. 4 and FIG. 6, when the pressure in the container rises, steam leakage is suppressed at the mating surface of the fitting part of the bottom container and the upper lid and the flange, and the steam pressure generated during cooking is The lower stopper 2d of the upper lid 2 is fitted in a dimensional relationship that does not exceed the stopper 1d of the bottom container 1.

When the vapor pressure in the container gradually rises, the entire upper surface 2b of the upper lid 2 is elasticized by the vapor pressure applied to the inner periphery of the upper lid 2 and the cylinder bottom 3h of the cap 3, as shown in FIGS. Since it is deformed, the displacement is large, and a gap is generated between the upper surface 2b of the upper lid 2 and the outer peripheral side of the flange 3a of the cap 3, and steam is discharged.
When the steam is discharged more than the steam is evaporated, the vapor pressure in the container approaches the air pressure outside the container and returns to the original shape by the elasticity of the upper lid 2, and the upper surface 2 b and the cap of the upper lid 2 as shown in FIG. 3 is closed.
While the food in the container is heated, the pressure increase and the pressure decrease due to the discharge are repeated by opening and closing the gap between the upper surface 2b of the upper lid 2 and the flange 3a of the cap 3.
The fitting portion between the bottom container 1 and the upper lid 2 does not require a gap for the upper lid 2 to move, so that there is little steam leakage.
In this way, the elastic deformation of the upper lid 2 is used, and the steam discharge method can accurately set the pressure even when the vapor pressure rises slowly. Therefore, unstable factors such as friction loss accompanying the movement of the cap 3 and the upper lid 2 are used. Therefore, it is possible to accurately and stably discharge steam at an appropriate pressure.

  When the vapor pressure rises rapidly, as shown in FIGS. 5 and 11, the vapor pressure in the container is also applied to the cylinder bottom 3 h of the cap 3, and the vapor applied to the cap by the cap 3 and the cap 2 is prevented from coming off. The pressure increases, and the cap 3 f of the cap 3 exceeds the upper cap 2 f of the upper lid 2. As a result, the flange 3a that has covered the steam discharge hole 2g also moves to open a large gap between the upper surface 2b of the upper lid 2 and the flange 3a of the cap 3, and before a spill occurs, a large amount of steam can be quickly discharged. Can be discharged. The retaining member 3f stops in the middle of the upper cylindrical inner peripheral portion 2e.

Next, a second embodiment is shown. Only the parts different from the first embodiment are shown below, and the other configurations and operational effects are the same as those of the first embodiment.
FIG. 7 shows an enlarged cross-sectional view of the bottom container and the top lid. As shown therein, a retaining surface 1d1 of the bottom container 1 is provided with a retaining surface 1d1 and a retaining surface 1d2, and a retaining surface 2d of the upper lid 2 is provided with a lower retaining surface 2d1 and a retaining surface 2d2, and the retaining surface 1d1. The width formed by the lower retaining surface 2d1 and the lower retaining surface 2d2 is the same or slightly larger than the width formed by the retaining surface 1d2, and is elastically deformed and fitted. .

FIG. 8 shows a third embodiment of the present invention. As in the second embodiment, the configurations and functions other than those described below are the same as those in the first embodiment.
FIG. 8 shows an enlarged cross-sectional view of the bottom container and the top lid. As shown therein, the vertical dimension formed by the flange lower surface 2a1 and the retaining upper surface 2d1 of the upper lid 2 is smaller than the vertical dimension formed by the flange upper surface 1a1 and the retaining lower surface 1d2 of the bottom container 1. By doing so, the flange 2a is elastically deformed and fitted.

Next, with reference to FIG. 12, only a different part from 1st Embodiment is shown about 4th Embodiment.
FIG. 12 shows an enlarged cross-sectional view of the upper lid and the cap at a fixed cap position. As shown there, an upper retaining surface 2f1 and an upper retaining surface 2f2 are provided on the retaining member 2f of the upper lid 2, and an upper surface 3f1 and a retaining surface 3f2 are disposed on the retaining member 3f of the cap 3, and an upper retaining surface 2f1 is disposed. Vapor pressure rises rapidly by elastically deforming and fitting the width formed by the retaining upper surface 3f1 and the retaining lower surface 3f2 with the same or slightly larger dimensions than the width formed by the upper retaining surface 2f2 and the upper retaining surface 2f2. In this case, the cap stopper 3f does not exceed the top lid stopper 2f.
The vertical dimension between the cap 2f of the top lid 2 and the upper surface 2b is substantially the same as or slightly larger than the cap 3 from the cap 3 to the lower surface of the flange 3a, and the upper surface 2b and the flange 3a are in close contact with each other. It is allowed.

With reference to FIGS. 13-15, about 5th Embodiment which is a case where there exist several steam discharge openings, only a different part from 1st Embodiment is shown.
13 is a cross-sectional view of the fitting portion of the upper lid and the cap and the steam discharge port, FIG. 14 is a top view excluding the flange of the cap, and FIG. 15 is a cross-sectional view of the steam discharge state.
As shown in FIGS. 13 and 14, the cylindrical outer peripheral portion 3 e of the cap 34 is substantially composed of a straight line and an arc portion, and the upper cylindrical inner peripheral portion 2 e of the upper lid 2 has a circular shape. As a result, the circular arc part of the cylindrical outer peripheral part 3e and the circular part of the cylindrical inner peripheral part 2e are fitted, while the upper cylindrical inner peripheral part 2e and the cylindrical outer peripheral part 3e are almost between A half-moon shaped steam discharge opening 23 is formed.
The stopper of the upper lid has a circular shape, and the stopper of the arc-shaped cap is fitted to a part of the circle of the upper lid.
Further, as shown in FIG. 15, the steam passes through the steam discharge opening 23 between the upper cylindrical inner peripheral portion 2e and the cylindrical outer peripheral portion 3e and the space between the concave portion 2q and the flange 3a. It is discharged from the gap between the flange 3a and the upper part 2b of the upper lid 2.

With reference to FIGS. 16-18, about 6th Embodiment which is a case where steam is discharged | emitted from a steam discharge hole using a hinge, only a different part from 1st Embodiment is shown.
16 is a cross-sectional view of the fitting portion of the upper lid and the cap and the steam discharge port, FIG. 17 is a cross-sectional view of the steam discharge state when the steam pressure rises slowly, and FIG. 18 is the steam discharge state when the steam pressure suddenly rises. FIG.
As shown in FIG. 16, the upper surface 2b of the upper lid 2 is provided with a recess 2q and a plurality of steam discharge holes 2g, and a thin hinge 2r is provided between the steam discharge hole 2g and the upper cylindrical inner peripheral part 2e. It has been. The upper lid 2 and the cap 3 are brought into close contact with the upper surface 2b and the flange 3a in the same manner as in the fourth embodiment, so that the cap retainer 3f does not exceed the retainer 2f of the upper lid even when the vapor pressure suddenly rises. .
As shown in FIG. 17, when the vapor pressure rises gently, the hinge 2r of the upper lid 2 is not greatly affected by the vapor pressure, and the upper lid 2 is elastically deformed and swells, and the upper surface 2b of the upper lid 2 and the cap 3 A gap is generated between the outer periphery of the flange 3a and steam is discharged.
As shown in FIG. 18, when the vapor pressure suddenly rises, the vapor pressure in the container is also applied to the inside of the upper lid 2 or the cylinder bottom 3h of the cap 3 before the spilling occurs, and a part of the upper lid 2 is thinned. Since the hinge 2r formed in the shape of the upper lid 2 is small in rigidity, the upper cylindrical inner peripheral portion 2e side of the upper lid 2 is pushed upward and reversed, and a gap between the upper portion 2b of the upper lid 2 and the flange 3a of the cap 3 is greatly opened. A large amount of steam can be quickly discharged at once through the steam discharge hole 2g, the recess 2q, and the flange 3a.

Referring to FIG. 19, only a portion different from the sixth embodiment is shown in the seventh embodiment which is an embodiment without a bottom opening hole when steam is discharged from the steam discharge hole using a hinge.
FIG. 19 is a cross-sectional view of the steam discharge state when the steam pressure rises gently. As shown therein, in order to increase the vapor pressure applied to the upper lid, a closed cylinder bottom 2h (no opening) is provided on the upper cylindrical inner peripheral portion 2e of the upper lid 2, and the cap 3 is attached to the upper lid 2. At the time of insertion, a bottom opening hole 3j was provided in the cylinder bottom 3h of the cap 3 in order to allow air in the upper cylindrical inner periphery 2e of the upper lid to escape.
Since there is no steam leakage from the fitting portion of the upper lid 2 and the cap 3 and the upper lid 2 receives the entire surface of the vapor pressure applied to the cap 3, the sixth embodiment can be applied to cases where the vapor pressure rises gently or suddenly. In addition, the vapor pressure can be detected more accurately.
In this case, the vapor pressure applied to the cap 3 is only applied to the flange 3a portion applied through the vapor discharge hole 2g. As a result, the pressure on the cap 3 is reduced, so that the degree of fitting force between the upper lid 2 and the cap 3 is reduced. May be.

Next, with reference to FIGS. 20-23, about 8th Embodiment which discharges | emits steam from a steam discharge port using a hinge, only a different part from 5th Embodiment is shown.
20 is a cross-sectional view of the fitting portion of the upper lid and the cap and the steam discharge port, FIG. 21 is a top view excluding the cap flange, and FIG. 22 is a cross-sectional view of the steam discharge state when the steam pressure rises gently. 23 is a cross-sectional view of the steam discharge state when the steam pressure rises rapidly. As shown in FIGS. 20 and 21, a recess 2q is provided on the upper surface 2b of the upper lid 2, and a thin hinge 2r is provided slightly outside the upper cylindrical inner peripheral portion 2e of the upper lid 2. The upper surface 2b and the flange 3a are brought into close contact with each other in the same manner as in the fourth embodiment, so that the cap retainer 3f does not exceed the upper cover retainer 2f even when the vapor pressure rises rapidly.
As shown in FIG. 22, when the vapor pressure rises slowly, the hinge 2r of the upper lid 2 is not greatly affected by the vapor pressure, and the upper lid 2 is elastically deformed and swells, and the upper surface 2b of the upper lid 2 and the flange 3a of the cap 3 A gap is generated between the outer periphery and the steam, and steam is discharged through the space between the steam discharge opening 23, the recess 2q, and the flange 3a.
As shown in FIG. 23, when the vapor pressure suddenly rises, the vapor pressure in the container is also applied to the inside of the upper lid 2 or the tube bottom 3h of the cap 3 before the spilling occurs, and a part of the upper lid 2 is thinned. Since the hinge 2r formed in the shape of the upper lid 2 has a small rigidity, the upper cylindrical inner peripheral portion 2e side of the upper lid 2 is pushed upward and reversed, and a gap between the upper portion 2b of the upper lid 2 and the flange 3 of the cap 3 is greatly opened. A large amount of steam can be quickly discharged at once through the space between the steam discharge opening 23, the recess 2q, and the flange 3a.

Sectional drawing which shows 1st Embodiment of this invention. The top view of 2nd Embodiment of this invention. The top view of the upper cover of this invention. Sectional drawing which shows the vapor | steam discharge | emission state when vapor pressure rises gently in 1st Embodiment of this invention. Sectional drawing which shows the vapor | steam discharge | emission state when vapor pressure rises rapidly in 1st Embodiment of this invention. The fragmentary sectional view of the retaining part of a bottom container and an upper lid of a 1st embodiment of the present invention. The expanded sectional view of the bottom container and upper cover of 2nd Embodiment of this invention. The expanded sectional view of the bottom container and upper cover of 3rd Embodiment of this invention. The expanded sectional view of a cap fixed position top cap and cap of a 1st embodiment of the present invention. In 1st Embodiment of this invention, the expanded sectional view of the vapor | steam discharge | emission state when vapor | steam pressure rises gently. In 1st Embodiment of this invention, the expanded sectional view of the vapor | steam discharge | emission state when vapor pressure rises rapidly. The expanded sectional view of a cap fixed position top cap and cap of a 4th embodiment of the present invention. Sectional drawing of the fitting part of a top cover and a cap, and a steam exhaust port of 5th Embodiment of this invention. The top view except the flange of the cap of 5th Embodiment of this invention. Sectional drawing of the vapor | steam discharge state of 5th Embodiment of this invention. Sectional drawing of the fitting part and vapor | steam discharge port of an upper cover and a cap of 6th Embodiment of this invention. In 6th Embodiment of this invention, sectional drawing of the vapor | steam discharge | emission state in case vapor pressure rises gently. In 6th Embodiment of this invention, sectional drawing of the vapor | steam discharge state when a vapor | steam pressure rises rapidly. In 7th Embodiment of this invention, sectional drawing of the vapor | steam discharge | emission state in case vapor pressure rises gently. Sectional drawing of the fitting part of an upper cover, a cap, and a vapor | steam discharge port of 8th Embodiment of this invention. The top view except the flange of the cap of 8th Embodiment of this invention. In 8th Embodiment of this invention, sectional drawing of the vapor | steam discharge | emission state in case vapor pressure rises gently. In 8th Embodiment of this invention, sectional drawing of the vapor | steam discharge state when a vapor | steam pressure rises rapidly.

Explanation of symbols

1: (with flange) bottom container 1a: flange 1c: cylindrical inner periphery 1d: retaining stopper 1d1: retaining top 1d2: retaining bottom 1k: handle 1m: storage section 2: (with flange) top lid 2a: flange 2b : Upper surface of cover 2c: Lower cylindrical inner periphery 2d: Retaining stopper 2d1: Retaining upper part 2d2: Retaining retaining lower part 2e: Upper cylindrical inner peripheral part 2f: Upper retaining stopper 2f1: Upper retaining upper part 2f2: Upper retaining lower part 2g: Steam outlet 2h: Tube bottom 2j: Bottom opening hole 2k: Handle 2m: Upper space 2q: Recess 2r: Hinge 23: Steam outlet opening 3: Cap (with flange) 3a: Flange 3e: Cylindrical outer periphery 3f: Retaining 3f1: Retaining top 3f2: Retaining retaining 3h: Tube bottom 3n: Projection

Claims (9)

A flanged bottom container for storing food, a flanged upper lid for fitting with the bottom container, and a flanged cap for fitting with the upper lid, and an upper cylindrical inner peripheral portion of the bottom container and a lower cylindrical outer periphery of the upper lid A microwave cooking container which is provided with a stopper in the fitting part with the part, and further provided with a stopper in the fitting part between the upper cylindrical inner peripheral part of the upper lid and the cylindrical outer peripheral part of the cap. In
An upper and lower portions of the upper lid and the flange of the cap are brought into close contact to constitute a steam discharge opening / closing portion, and a gap is formed between the upper lid upper portion and the flange of the cap due to the bulging deformation of the upper lid due to the vapor pressure in the container. Generated and discharged steam,
Microwave cooking container.   In response to a sudden rise in the internal pressure of the container, the cap retainer exceeds the cap retainer, creating a large gap between the top of the top lid and the cap flange, and discharging a large amount of steam at once. The container for microwave oven cooking of Claim 1 made to do.   The upper cylindrical inner peripheral portion having a size that is the same as or slightly larger than the maximum retaining diameter of the cap is provided above the minimum retaining portion of the upper lid with respect to the maximum retaining portion of the cap. Container for microwave cooking.   The engagement width of the cap is the same as or slightly smaller than the engagement width of the upper lid, in the vertical engagement width in which the upper cap prevention of the upper lid and the cap stopper are engaged. 1 Microwave cooking container.   In the vertical engagement width in which the bottom container retainer and the upper lid lower retainer are engaged, the engagement width of the top lid is the same as or slightly larger than the engagement width of the bottom container. The container for microwave oven cooking of Claim 1.   The top lid flange is received on the top surface of the bottom container, the bottom lid bottom stopper is engaged with the bottom container top stopper, and elastic deformation stress is applied to the top lid flange to the bottom container. The container for cooking a microwave oven according to claim 1, wherein the upper lid is held.   The container for microwave oven cooking according to claim 1, wherein a plurality of opening holes for discharging steam are formed in an upper part of the upper lid facing the flange of the cap.   The container for microwave oven cooking of Claim 1 which has a substantially meniscus-shaped vapor | steam discharge port formed by the upper cylindrical inner peripheral part of the said upper cover, and the substantially linear part of the cylindrical outer periphery of the said cap. 2. The microwave oven cooking container according to claim 1, wherein a thin hinge that operates by steam pressure is formed on the upper lid facing the flange of the cap.

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