JPH07330006A - Enclosed container with vent-hole plug - Google Patents

Abstract

PURPOSE:To apply an enclosed container with a vent-hole plug to cooking by a microwave oven and preservation for a long time, by shutting an air path of an intermediate cover by a vent-hole plug and covering the intermediate cover with an outer cover and fixing the outer cover to the container body with fitting tools and pressing the intermediate cover to the opening of container body through a packing. CONSTITUTION:In a container body 1, a packing contact 3 and fixing part 4 are formed at the periphery of the opening 2 respectively. In an intermediate cover 5 coating the opening 2, a groove 6 is formed at the lower face thereof to bury a packing 7 touching a packing contact 3 and a hole 9 for fitting a valve, provided with a female screw part 10 and a ventilation air path 11 is bored at a recess 8 formed on the upper face. Moreover, a male screw part 13 engaging with the female screw part is formed at the lower part, in a vent-hole plug 12 attached in the hole for fitting the valve and the head 14 is formed at the upper part. A step 20 is formed between the peripheral rib 18 and the high ceiling 19 in the outer cover 17. A shaft hole 22 is bored in the support 21 of the rib 18 and respective shafts 28 in a pair of arms 27 extended to both sides of the connection part 26 are fitted in the shaft hole 22 as a fixing tool 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closed container with a vent plug that can be used for pressure cooking using a microwave oven at home and that can hold the cooked food as it is for a long period of time.

[0002]

2. Description of the Related Art Conventionally, containers that can be cooked using a microwave oven have been known, but all of them have not been sufficiently sealed.

[0003] Therefore, although the cooked food immediately after being cooked by the microwave oven is in a state of being heat-sterilized, the container used does not have a hermeticity. The air inside contracts,
With the outside air to compensate for this contraction, bacteria entered the container, causing the food to rot. Therefore,
Although it is also stored frozen in a freezer as a preventive measure against spoilage, the taste may be impaired when frozen at home.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned drawbacks, that is, the above-mentioned drawbacks that waste bacteria are sterilized by heating due to the invasion of outside bacteria into the container after cooking by microwaves and the microwave oven. It is possible to use it as a storage container or a lunch box at home while improving the airtightness by enabling pressurization at the time of heating by cooking and improving the sealability and keeping the sterilized state after heating. It is intended to provide a closed container with an easily vented plug.

[0005]

The applicant of the present invention has previously devised a closed container with a ventilation plug (actual open flat 5-68862), but in the test of the product in which the invention was implemented, various improvements were noticed. The invention of the present application has been reached. In this invention, a packing contact portion is formed in the opening of the container body, and an annular groove is provided on the lower surface of the peripheral edge of the elastically deformable inner lid that covers the opening of the container body. The packing that fills up almost completely without gaps is formed to have a length greater than the depth of the groove so that the packing abuts the packing abutting part of the container body when the inner lid is covered. The vent plug formed with the plug mounting hole and formed separately from the inner lid has a male screw part that is screwed with the female screw part, and a head formed on the upper part of the male screw part with a diameter larger than the male screw part. In addition, the vent plug is equipped with a plug packing having a diameter larger than the above-mentioned female threaded portion, and the upper end of the ventilation passage is covered with the cap of the diameter of the plug packing on the upper surface of the container lid with the cap covered with the vent plug. Open inside and open the lower end of the ventilation passage to the container body side, When the stopper is tightened, the stopper packing abuts the upper surface of the inner lid and the ventilation plug to block the air permeability of the ventilation passage, and the inner lid is covered with an elastically deformable outer lid. Alternatively, the stopper is pivotally attached to the container body, and when the stopper is pivotally attached to the outer lid, the engaging portion is formed on the container body, and when the stopper is pivotally attached to the container body, the engaging portion is attached to the outer lid. It is formed so that when the stopper is rotated and hung on the locking part, the outer lid is pressed so that the inner lid presses the inner lid against the container body, and each component is heated by microwave heating of the microwave oven. The above-mentioned problems were solved by molding with a synthetic resin and synthetic rubber that can be used in.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of a closed container with a vent plug used in the method of the present invention will be described with reference to the drawings. The closed container with a vent plug, which is shown in an exploded perspective view in FIG. 1, is also used as a storage container or a lunch box at home, and a rectangular container body 1 formed of polycarbonate has a flange portion formed in an opening 2. This flange portion is the packing contact portion 3. On the long side flange portion of the container body 1, a locking portion 4 is formed so as to extend substantially horizontally.

An elastically deformable inner lid 5 that covers the opening 2 of the container body 1 is also made of polycarbonate, and has an annular groove 6 that opens downward on the outer periphery of the lower surface. The elastic solid packing 7 made of silicon rubber that fills the groove 6 over the entire circumference with almost no space is formed by the groove 6
Is formed to have a height larger than the depth of the packing so that the packing 7 contacts the flange portion of the container body 1, that is, the packing contact portion 3 when the inner lid 5 is covered.

A mortar-shaped recess 8 is provided on the upper surface of the inner lid 5, and a plug mounting hole 9 penetrating the inner lid 5 is formed at the center of the recess 8, and the inner periphery of the plug mounting hole 9 is formed. Female thread 1 on the surface
0 is formed. Further, an air passage 11 is formed by notching the edge and the female screw portion 10 at the edge of the plug mounting hole 9, and the upper end of the air passage 11 is opened to the upper surface of the inner lid 5. The lower end is open to the lower surface of the inner lid 5.

Similarly, a lower part of the polycarbonate vent plug 12 is formed with a male screw part 13 to be screwed with the female screw part 10, and an upper part 14 having a larger diameter than the male screw part 13 is formed on the upper part.
Has been formed. The lower side of the head 14 is the recess 8 of the inner lid 5.
In accordance with the shape of the above, the lower part is formed in a conical shape having a small diameter, and the male screw part 13 is connected below the head part 14. Further, a plug packing mounting groove 15 having a diameter larger than that of the female screw portion 10 is provided on the lower side of the head 14 so as to be horizontally and shallowly shallow, and a solid silicone rubber plug packing 16 having O-ring elasticity is mounted. There is.

The ventilation passage 11 is opened inside the diameter of the plug packing 16 in a state where the ventilation plug 12 is mounted in the plug mounting hole 9. Therefore, the vent plug 12 has the inner lid 5
When tightened in, plug packing 16 with a strong force by screwing
Is pressed against the recess 8 of the inner lid 5, and the plug packing 16 is brought into close contact with the plug packing mounting groove 15 and the recess 8 of the inner lid 5. In this state, the ventilation passage 11 is open to the inside of the plug packing 16 and is covered with the ventilation plug 12, so that the ventilation of the ventilation passage 11 is blocked.

An elastically deformable outer lid 17 made of polycarbonate, which covers the inner lid 5, has a cover rib 18 formed at the periphery of the same height as the periphery of the inner lid 5, and the upper surface of the outer lid 17 is an outer periphery. A high ceiling portion 19 is formed by bulging the center side upward by about 7 mm from the above portion. The high ceiling portion 19 and the covering rib 1
A step portion 20 is formed between the step portion 20 and the step portion 8. In the vicinity of the center on the long side on both sides of the outer lid 17, the support ribs 21, 21
And a shaft hole 22 is formed in the support shaft portion 21. Further, as shown in FIG. 2, a chopstick stopper 23 is provided on the back side of the high ceiling portion 19 and chopsticks 24 are attached.

Similarly, the stopper 25 made of polycarbonate has a pair of arm portions 27, 2 on both sides of the connecting portion 26.
7 extends upward, and the pair of arm portions 27,
A pair of shafts 28, 28 are formed inside the tip of 27 so as to face each other. The shaft 28 is fitted into the shaft hole 22 of the outer lid 17, and the stopper 25 is rotated on the outer lid 17. It is freely pivoted. The arm portions 27,
7, an engaging portion 29 is provided in a protruding manner, a lower side of the back side of the connecting portion 26 is cut out to form a finger hook portion 30, and the container body 1 is covered with the inner lid 5. Cover the outer lid 17,
When the stopper 25 is rotated to engage the engaging portion 29 with the locking portion 4 of the container body 1, the stopper 25 presses the outer lid 17 toward the container body 1 side. 17 presses the inner lid 5 onto the container body 1 to fasten it. Note that the stopper 2
The upper and lower sides of 5 refer to the upper and lower sides in a state in which the outer lid 17 is covered and the stopper 25 is hooked on the locking portion 4.

Therefore, when the ventilation plug 12 is tightened, the ventilation of the ventilation passage 11 is cut off, so the stopper 25
When the inner lid 5 is pressed against the container body 1 by hanging the bag, the packing 7 having elasticity has the opening 2 and the inner lid 5 of the container body 1.
The container body 1 is sealed by closely contacting with the groove 6 of.

Next, rice cooking will be described as an example of a method of cooking and storing using the closed container with the ventilation plug.

First, about 1/4 or less of the capacity of the container body 1 (180 mL since the container body 1 of this embodiment had a capacity of 670 mL) and about 1.4 times the rice (this embodiment). In the example, 250 mL of water is put in, the inner lid 5 is covered, the stopper 25 is applied, the ventilation plug 12 is tightened, and the ventilation of the ventilation passage 11 of the inner lid 5 is blocked. At this time, the outer lid 17 is pressed to the container body 1 side by the stopper 25, and the outer lid 17 presses the inner lid 5 to the opening 2 of the container body 1 via the packing 7, so that as described above. The container body 1 is sealed.

Next, when the airtight closed container is placed in a microwave oven and heated by microwaves, the contents in the container body 1 are heated by microwaves and the temperature in the container rises, but the synthetic resin becomes metal. Since the thermal conductivity is low, the temperature on the outer surface of the container does not rise so much. For this reason, a temperature difference between the inside and the outside of the container occurs, and the inside of the container of the inner lid 5, that is, the lower surface becomes hotter than the outside of the container of the inner lid 5, that is, the upper surface, and the inner lid 5
Due to the difference in thermal expansion between the upper surface and the lower surface, the inner lid 5 tends to warp upward. However, in the airtight container with a vent plug of the present invention, the outer lid 17 is covered on the upper surface side where the temperature of the inner lid 5 is not so high, so that the outer lid 17 has a small temperature difference between the upper surface and the lower surface and hardly warps. . When the outer lid 17 is covered and the stopper 25 is hung, the peripheral portion of the inner lid 5 is pressed against the container body side by the step portion 20 of the outer lid 17 having almost no warp, so that the temperature in the container rises due to the heating of the microwave oven. However, the warp of the inner lid 5 is suppressed, and the warp becomes very small. Moreover, when the stopper is applied, the packing 7 is pressed and elastically deformed and crushed. Therefore, as described above, even if the inner lid 5 is slightly warped due to the temperature difference between the front and back of the inner lid 5 during heating, The packing contact portion 3 between the inner lid 5 and the container body 1 due to this warp
The packing 7 compensates for the widening of the gap between and by restoration of elastic deformation, and the sealed state can be maintained.

When the water in the container body 1 is boiled and the pressure in the container body 1 is increased by continuing microwave heating, the inner lid 5 and the outer lid 17 are further pushed up by this pressure and elastically deformed. , Packing 7 of inner lid 5 and container body 1
The gap with the packing abutting part 3 is expanded, and the steam blows out from this gap. When the steam blows out, the microwave heating is stopped, and the water in the container body 1 is absorbed by the rice for about 10 minutes.

After the water absorption time of the rice has elapsed, the rice is reheated in a microwave oven. In this example, since a microwave oven with an output of 500 W was used, reheating was performed for 7 minutes. At this time,
The steam generated by heating is blown out from between the packing 7 and the packing contact portion 3 as in the above.
Since the rice absorbs almost all the water in it, the glue content that boiled and foamed in the container body 1 is hardly blown out. Moreover,
When this steam is blown out, the pressure generated in the container body 1 is increased by the steam generated by heating as described above, rice can be cooked at a pressure higher than the external pressure, and the air in the container body 1 is almost expelled to the outside of the container body 1 by the steam. And, the inside of the container body 1 is sterilized by heating.

When this reheating is completed, the stopper 2 is held for 5 minutes.
Leave 5 on and steam the rice. During this steaming, the gas inside the container body 1 also cools and contracts, and the pressure inside the container body 1 decreases. The inner lid 5 has the vent plug 12 tightened, and the stopper 25 is hung on the outer lid 17 to press the inner lid 5 to prevent the inner lid 5 from warping and press the container body 1 via the packing 7. Therefore, as the pressure in the container body 1 gradually decreases, the inner lid 5 and the outer lid 17 that are pushed up by the pressure in the container body 1 and elastically deformed.
Elastically returns to its original state, and the packing 7 abuts the packing abutting portion 3 of the container body 1 in a state where the pressure inside the container body 1 is slightly higher than the atmospheric pressure, and the container body 1 is sealed. Therefore, when the pressure in the container body 1 is higher than the outside air pressure, the closed state is restored, so that the bacteria are prevented from entering the container body 1 from the outside together with the outside air. When this steaming time elapses after the end of heating, the gas in the container body 1 further cools and the pressure drops, and the pressure becomes negative compared to the outside air pressure, and the inner lid 5 receives this negative pressure and causes the container 7 to pass through the packing 7. The body 1 is strongly pressed. Since the elastic solid packing 7 made of silicon rubber has a length higher than the depth of the groove 6 and fills the groove 6 over the entire circumference with almost no gap, the inner lid 5 is strongly pressed against the container body 1 by the negative pressure. Also, the packing 7 does not escape from the packing abutting portion 3 of the container body 1 and wrinkles are not formed on the packing surface that serves as an entry path for the outside air. The closed container is tightly closed.

When the steaming time has elapsed, the rice cooking is completed, but when the rice is reheated, the rice is cooked at a pressure higher than the atmospheric pressure as described above. The rice cooked by the method described above using the container of this example, the rice grains stand in a closed container with a vent plug, compared to the microwave cooked rice using a normal container without pressure, it is delicious there were.

Next, the storage of cooked rice in a closed container with a vent plug will be described. As described above, the inside of the container is heat-sterilized during rice cooking. If this container is left in a sealed state, the air pressure inside the container decreases as it cools, and the pressure inside the container becomes even lower, so that oxygen required for the growth of various bacteria is less in the container than in the outside air. Moreover, the inner lid 5
Is strongly pressed against the container body 1 via the packing 7 by this negative pressure, and as described above, the solid packing 7 having elasticity made of silicon rubber serves to firmly seal the airtight sealed container. , Even if the air pressure inside the container becomes very low, the outside air containing various bacteria will not enter the container, and if it is stored at room temperature or at a low temperature in a refrigerator,
The time until the rice in the container reaches the rotten state, that is,
It takes a long time to reach a state where a large amount of bacteria have propagated, and rice lasts longer.

When the airtight container with a vent plug in which the inside of the container is cooled and has a negative pressure is opened, the vent plug 12 is rotated and loosened. At this time, the plug packing 16 fitted in the plug packing mounting groove 15 is lifted together with the ventilation plug 12 and separated from the recess 8 of the inner lid 5, and the ventilation passage 11 is opened from the gap between the plug packing 16 and the inner lid 5. The outside air passes through the container and quickly eliminates the negative pressure. Next, when the stopper 25 is removed, the negative pressure in the container has already been released, so the outer lid 1
7 and the inner lid 5 can be easily opened.

When the closed container of this embodiment is washed, the ventilation plug 12 is loosened and removed, the stopper 25 is disengaged from the locking portion 4, and the outer lid 17 and the inner lid 5 and the container body 1 are separately washed. I'll do it. At this time, since no unreasonable force is applied to the plug packing 16 and the portion where the plug packing 16 contacts and the packing 7, the plug packing 16 and the like can be easily handled without being damaged.

In the above, cooked rice was described as an example of a method of cooking and storing using a closed container with a vent plug. Next, the case of cooked rice will be briefly described.

First, 10 g of burdock is peeled off, diced and soaked in vinegar water to remove the pimples. Then, 90 mL of rice was added to the airtight sealed container of the above-mentioned example, and 16
Add 0 mL of water, half a tablespoon of soy sauce and half a tablespoon of sake,
In addition, add 20 g of chicken meat, 4 halves of fried food, 15 g of carrot, burdock, dried shiitake mushroom, finely chopped one each, put the inner lid 5 on and put the stopper 25, and tighten the ventilation plug 12. The air passage 11 of the inner lid 5 is blocked. Next, the microwave heating in which steam is blown out from the gap between the packing 7 and the packing contact portion 3 is continued,
When the steam blows out, the microwave heating is stopped and the water in the container body 1 is absorbed by the rice for about 10 minutes. When this water absorption time has elapsed, reheat in a microwave oven. In this example, since a microwave oven with an output of 500 W was used, reheating was performed for 10 minutes as in the case of cooking rice. After the completion of this reheating, the rice is steamed for 10 minutes and cooked to complete the rice.

As described above in detail in the case of cooked rice, this cooked rice is cooked under pressure by microwave heating and cooks deliciously. Moreover, as described in detail in the case of the above-mentioned rice cooking, since it is hermetically sealed in a state where it is heated and sterilized by microwave oven heating, if this airtight sealed container is used as a lunch box in the hermetically sealed state after cooking, the cooked rice Even if it is easily altered, it is less likely to rot and food poisoning can be prevented.

Next, the case of apple jam will be described as an example of different cooking and storage using the airtight container with a vent according to this embodiment.

First, peel the apple, remove the core, and
Finely chop about 0 g, and container body 1 with 80 g of sugar
Put in the inside, squeeze and squeeze half of the lemon, cover the inner lid 5 with the aeration plug 12 tightened, cover the outer lid 17, and put the stopper 25. Then, this closed container with a ventilation plug is heated in a microwave oven. In this example, a microwave oven with an output of 500 W was used, so heating was performed for 10 minutes. At this time,
As in the case of cooking rice, the steam pressure generated by heating elastically deforms the inner lid 5 and the outer lid 17, so that steam is appropriately blown out between the packing 7 and the packing contact portion 3, and the container body 1
The apples etc. inside are sterilized by heat and pressure cooked,
Apple jam is ready.

After heating, if left as it is, the inside of the closed container with the aeration plug is hermetically closed in the heat-sterilized state as described in the above rice cooking, and the jam in the container lasts a long time.

In addition, since jams made at home do not contain preservatives, etc., if the container is opened when eating jam, germs and the like may be transferred from the air or jam knife to cause spoilage and mold. However, using the airtight closed container of this example, after eating, close the airtight closed container containing the jam, hang the fastener and store by heating in a microwave oven to store the container. The inside of the container returns to a tightly sealed state by heat sterilization again, so that the jam does not grow mold, and it does not easily rot, so the jam in the container lasts a long time.

The material of each part of the airtight container with a vent plug used in the method of the present invention is not limited to this embodiment. For example, parts other than packing are made of heat-resistant polypropylene, polysulfone, or any other synthetic material. Microwave oven such as resin can be used for microwave heating, and when this heating increases the vapor pressure in the container body, the inner and outer lids are elastically deformed and the inside of the container is removed from between the container body and the inner lid. It suffices that the pressure can be appropriately released to perform pressure cooking, and the container returns to the hermetically closed state after heating is completed.

Similarly, the material of the stopper packing and the packing attached to the peripheral edge of the inner lid is not limited to silicone rubber, and fluorocarbon rubber or the like can be used in microwave heating of a microwave oven, and is appropriately used. Any elastic material may be used.

Further, as described above, the packing attached to the peripheral edge of the inner lid does not escape from the packing abutting portion even when the inner lid is strongly pressed against the container body, and serves as an entrance path for outside air. It is desirable to form a solid packing with elasticity so that it will not wrinkle and will be tightly sealed, and that the height is greater than the depth of the groove and that the groove is filled almost without gaps over the entire circumference. However, the hollow packing having elasticity may be formed to have a length higher than the depth of the groove and to fill the groove over the entire circumference with almost no space.

The hollow packing is elastically deformed with a light force more than the elastic solid packing. Therefore, when hollow packing is used, when the stopper is formed so that the amount of crushing of the packing, that is, the amount of elastic deformation when the stopper is applied, is increased, the warp of the inner lid during heating is a solid packing. Even if a little more than in the case of the above-mentioned embodiment using, the expansion of the gap between the inner lid and the packing contact portion of the container body due to this warping can be compensated by the restoration of the elastic deformation of the hollow packing, and the sealed state can be maintained. it can.

However, in the hollow packing, as shown in FIG. 4, when the inner lid is pressed against the container body by a strong negative pressure, the packing is crushed, and the partially protruding packing is folded and the inner lid is folded. It is strongly pinched between the outer edge of the container and the packing abutting part of the container body, which may damage the packing. Moreover, when the packing is crushed, creases may be formed on the side wall of the packing, and outside air may slightly enter along the creases to impair the heat sterilization effect. It is desirable to use solid packing. In FIG. 4 showing the embodiment using the hollow packing, the reference numeral used in the drawing of the embodiment of the solid packing has the same reference numeral as that of the solid packing for the same function as that of the embodiment of the solid packing described above. And detailed description is omitted.

Further, the ventilation passage is not limited to this embodiment, and it is sufficient that the ventilation passage is opened inside the diameter of the plug packing in a state where it is mounted in the plug mounting hole. A ventilation path may be vertically formed on the plug, or a through hole may be provided near the edge of the plug mounting hole in addition to the plug mounting hole to form the ventilation path. When the trough diameter of the female screw part of is enlarged and the vent plug is screwed into the plug mounting hole, the vent passage is formed in the gap between the trough of the female screw part of the plug mounting hole and the outer diameter of the male screw part of the vent plug. You may do it.

The method of attaching the plug packing to the vent plug is not limited to this embodiment either, and the plug packing is brought into close contact with the vent plug and the recess of the inner lid when the vent plug is tightened, and the vent passage is closed. It is only necessary to be able to block the breathability of and to ventilate with the ventilation passage when the vent plug is loosened.

The stopper is not limited to the one described above. The stopper is pivotally attached to the container body, and the stopper is rotated to be hooked on the locking portion provided on the edge of the outer lid. The outer lid may be pressed against the container body side, and the inner lid may be pressed against the open end of the container body to seal the container body, and the shape of the fastener is not limited.

[0039]

As described above, in the closed container with the vent plug of the present invention, the vent passage provided in the elastically deformable inner lid is closed by the tightened vent plug, and the elastically deformable outer lid is provided with the inside. The lid is covered, the outer lid is pressed against the container body side with a stopper, and the inner lid is pressed against the opening of the container body through the packing, and synthetic resin has lower thermal conductivity than metal. Therefore, even if the inside of the container body becomes hot due to microwave heating, the upper surface of the inner lid does not get too hot, and the outer lid covered with the upper lid that does not get too hot has a large temperature difference between the upper surface and the lower surface. Therefore, the outer lid hardly warps due to the temperature difference. Therefore, even if the inner lid and the outer lid are pushed up by the pressure of the steam generated in the container body due to heating and elastically deformed, the inner lid and the outer lid, which have almost no warpage due to heat, suppress the warpage of the inner lid, When the pressure in the container body decreases and becomes slightly higher than the outside air pressure after heating, the inner lid and outer lid return to their original state due to elasticity, and the packing comes into contact with the packing abutting part of the container body to keep the heat sterilization state. Until then, the container body is hermetically sealed, and various bacteria are not sucked into the container body along with the outside air.Therefore, the time until the food in the container reaches a rotten state if stored in a sealed state after cooking with a microwave oven, that is, , It takes a long time to reach a state where a large number of bacteria have propagated, and the food will last longer even if it is not put in the freezer. Therefore, if this closed container with aeration plug is used for cooking in a microwave oven and the closed container with aeration is used as a lunch box in the closed state after cooking, even if it is easy to deteriorate like cooked rice, it will rot. It is difficult to prevent and has excellent features that can prevent food poisoning.

Furthermore, when food is put in this closed container and cooked in a microwave oven, the pressure inside the container becomes higher than that of the outside air due to the generated steam, and the steam inside the closed container is elastically deformed so that the inner lid and the outer lid are separated. Since it flexes and escapes from the gap between the packing and the packing contact portion as appropriate, there is an excellent feature that the food in the container can be cooked deliciously by pressure cooking.

In particular, since jams made at home by the conventional method do not contain preservatives, etc., bacteria may be transferred from the air or jam knife to cause spoilage or mold growth. , If the jam is cooked by heating in a microwave oven using the airtight closed container of the invention, it is not necessary to open the inner lid for storage after heating and cooking in the microwave oven and transfer it to another storage container. Like the above, it can be stored as it is in a heat-sterilized state and stored at room temperature or at a low temperature in a refrigerator for a long period of time, and even if you leave uneaten jam etc., cover it with an inner lid and an outer lid and hang a closure after eating Then, when heat-sterilized in a microwave oven and stored, the inside of the container will return to a tightly sealed state in the heat-sterilized state again, so the jam will not grow mold, it will not easily rot, and the jam will last longer. There is an excellent feature.

Further, even after the microwave oven is heated and cooled, the inside of the container becomes a strong negative pressure, and even when the inner lid is attached to the container, when the inner lid is opened, the ventilation plug is loosened to open the inside of the container. It has the excellent feature that the negative pressure can be released and the inner lid can be easily opened by letting outside air into.

[0043]

[Brief description of drawings]

FIG. 1 is a partially omitted exploded perspective view showing an embodiment of a closed container with a vent plug according to the present invention.

FIG. 2 is likewise a partially omitted exploded perspective view showing a state in which the outer lid of the embodiment of the present invention is turned upside down.

FIG. 3 is a partially omitted cross-sectional view showing a closed state of the airtight container with a vent according to the embodiment of the present invention.

FIG. 4 is a partially omitted cross-sectional view showing a closed state of an airtight container with a vent plug according to an embodiment using a hollow packing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container main body 2 Opening part 3 Packing contact part 4 Locking part 5 Inner lid 6 Groove 7 Packing 9 Plug mounting hole 10 Female screw part 11 Ventilation passage 12 Vent plug 13 Male screw part 14 Head 16 Plug packing 17 Outer lid 25 Stopper

Claims (3)

[Claims] 1. A packing contact portion is formed in the opening of the container body, and an annular groove is provided on the lower surface of the peripheral edge of the elastically deformable inner lid that covers the opening of the container body. The packing that fills up almost without gaps is formed to be higher than the depth of the groove so that when the inner lid is covered, the packing abuts on the packing abutting portion of the container body. A vent plug formed with a plug mounting hole having a male screw part that is formed separately from the inner lid, has a male screw part that is screwed into the female screw part, and a head that has a diameter larger than the male screw part on the upper part of the male screw part. And the vent plug is fitted with a plug packing having a diameter larger than the above-mentioned female threaded portion, and the upper end of the ventilation passage is placed on the upper surface of the inner lid with the inner lid fitted with the vent plug covering the container body. To the inside of the container, and open the lower end of the ventilation path to the container body side When the stopper is tightened, the stopper packing abuts the upper surface of the inner lid and the ventilation plug to block the air permeability of the ventilation passage, and the inner lid is covered with an elastically deformable outer lid. Alternatively, the stopper is pivotally attached to the container body, and when the stopper is pivotally attached to the outer lid, the engaging portion is formed on the container body, and when the stopper is pivotally attached to the container body, the engaging portion is attached to the outer lid. Formed,
When the stopper is rotated and hung on the locking part, the outer lid is pressed so that this inner lid presses the inner lid against the container body, and each component can be used in microwave heating of microwave oven. A closed container with a vent plug, characterized by being molded from various synthetic resins and synthetic rubber. 2. The closed container with a vent plug according to claim 1, wherein the packing fitted in the groove on the lower surface of the peripheral edge of the inner lid is made of elastic solid synthetic rubber. 3. The closed container with a vent plug according to claim 1, wherein the packing fitted in the groove on the lower surface of the peripheral edge of the inner lid is formed of a hollow solid synthetic rubber.