JP2009179395A - Container for microwave oven cooking - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container for microwave oven cooking having an air introducing means so as to prevent the container from crushing when pressure inside the container is lowered as time passes after cooking. <P>SOLUTION: The container 10 for microwave oven cooking has a bottom container 1 having a storing part 11, a lid 2, and a cap 3 having a flange 31. When a pressure inside the container rises while cooking, pressurized cooking while releasing steam can be performed like conventional containers. When the pressure is lowered as time passes after cooking, a tongue part 25 provided for introducing air while decompression is used for taking air into the container by the effect of a notch. Thereby, pressure inside the container is recovered to atmospheric pressure for preventing crushing. Thereafter, the container is kept in a sealed state. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a microwave cooking container for cooking various foods such as fresh foods, noodles, and side dishes with a microwave oven, and more particularly to a structure for preventing crushing during decompression.

Many conventional microwave cooking containers are used for reheating cooked ingredients, but the microwave cooking system container disclosed in Patent Document 1 is not only a container body and a lid, By providing a cap fitted to the lid, the pressure inside the container is maintained at atmospheric pressure or higher, and if the pressure becomes too high, cooking can be performed with a steaming effect by discharging steam. Therefore, even if it is raw food, it has the characteristics which can be cooked appropriately.
Japanese Patent No. 396377

  However, the system container of the above-mentioned Patent Document 1 is gradually reduced in pressure as the temperature inside the container decreases after cooking, so that the container may be deformed so as to be crushed. There was a problem that the inside of the microwave oven was dirty and difficult to handle.

  Then, an object of this invention is to provide the collapse prevention structure of the container for microwave oven cooking which can respond to the pressure fall inside the container after cooking.

The present invention is a microwave oven cooking container comprising a bottom container for storing ingredients, a lid fitted to the bottom container, and a flanged cap fitted to a recess provided in the center of the lid.
An annular recess is provided on the outer periphery of the recess of the lid, and the flange of the cap is fitted,
The said subject was solved by the container for microwave oven cooking provided with the air introduction means for preventing crushing at the time of pressure reduction in the said annular dent or the flange of the said cap.

According to the present invention, since the annular recess is provided on the outer periphery of the recess of the lid body, and the flange of the cap is fitted therein, the sealing performance of the container is improved compared to the prior art. The effect is enhanced.
However, according to the present invention, since the air introducing means is provided in the annular recess of the lid at the lower part of the flange of the cap or the flange of the cap in order to prevent crushing at the time of decompression, the pressure inside the container after the cooking is finished. Can cope with the decline.
As the air introduction means, a tongue-shaped portion, a slit, or a rib, and a combination thereof can be used.
After cooking, since the pressure in the container falls below atmospheric pressure, the container begins to deform, but the air can be recovered by flowing air from the air introduction means into the container.

  Further, since the deformation returns when the pressure in the container becomes substantially the same as the atmospheric pressure, the sealed state is maintained thereafter. Thereby, the food in the container is not exposed to the air outside the container after cooking, so that the influence of dust and drying can be minimized, and the quality of the food after cooking can be maintained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Embodiment 1

A first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is an exploded perspective view of the first embodiment, FIG. 2A is a top view of the lid of the first embodiment, and FIG. 1B shows an operating state of the air introduction means during decompression after cooking. It is the longitudinal cross-sectional view seen from the 3-3 line direction of FIG. 2 (A).

As shown in FIGS. 1 and 2B, the microwave cooking container (hereinafter, simply referred to as “container”) 10 includes a bottom container 1 having a food storage portion 11, a lid 2, And a cap 3 with a flange 31 fitted into a recess 23 provided in the center of the lid 2.
On the upper surface of the lid body 2, a tongue-like portion 25 separated in a cantilever shape extending inward from the outer diameter side end portion of the annular recess 21 covered with the flange 31 of the cap 3 is formed. Yes.

The operation principle of the microwave cooking container 10 is described in detail in Patent Document 1 and is not the gist of the present invention.
The difference from that of Patent Document 1 is the presence of an annular recess 21 provided on the outer periphery of the central recess 23 in which the flange 31 of the cap 3 is fitted tightly. The height is lower than that of the outer lid upper surface 22, whereby the sealing performance of the cap 3 is enhanced as compared with the conventional case, and as a result, the steaming effect by steam is also improved. Since the end of the knob 32 provided on the outer periphery of the flange 31 is always lifted slightly upward, the cap 3 can be easily removed when cooking is finished.

When ingredients are put into the microwave cooking container 10 and put into the microwave oven, the moisture in the ingredients is heated to become steam and fills the container, increasing the internal pressure.
This steam rises from a steam outlet 24 opened at the bottom of the recess 23 of the lid 2 through a step-like steam vent groove 29 (the lowermost part is always open), and the flange 31 of the cap 3 Push up by elastic deformation and pull out.
When the pressure in the container further rises, the cap 3 itself is lifted to a certain limit, and steam discharge is promoted.
However, since the tongue 25 is on the lower side of the flange 31 of the cap 3, no special opening force acts on the tongue 25, and the internal pressure adjustment of the container 10 is not affected.

When cooking is completed after a certain period of time, the cooked food is taken out and eaten, but in some cases, it may be left as it is.
In that case, the temperature inside the container decreases, and the internal pressure also decreases. Then, the force which tries to dent the whole container inside acts from the outside.
Since the tongue-like portion 25 is a notch, a stress concentration phenomenon occurs in this portion due to the notch effect, and an indentation deformation tends to occur.
At this time, since the force drawn toward the storage portion 11 acts on the tongue-like portion 25 more than the other portions, the vicinity of the tongue-like portion 25 is entirely inside as shown in FIG. As a result of the deformation, the air enters the container from the outside through the gap 28 formed by opening the base of the tongue-shaped portion 25 inward, and the pressure in the container is recovered. When the pressure in the container recovers to almost the same as the atmospheric pressure, the tongue 25 returns to its original shape and the inflow of air stops.

  Note that there may be a plurality of tongue portions 25, and the size is not particularly limited. However, the position to be provided is preferably near the steam vent groove 29 from the viewpoint of enhancing the notch effect.

Embodiment 2

  Next, FIG. 3 shows only the second embodiment different from the first embodiment. FIG. 3 is a top view of the lid 2a to which the second embodiment is applied.

In the first embodiment, the tongue 25 is used, but in this embodiment, a slit 26 that is opened at the tip of the blade is used.
The slit 26 does not have a gap for air inflow as much as the tongue-shaped portion of the first embodiment, but there is no concern about lifting the cap.

The slit 26 is provided at the same position as the tongue 25 described above. At the time of decompression, the slit 26 part is more likely to be deformed than the other part due to the notch effect, and therefore through the slit 26 from the gap between the flange 31 generated when the container is deformed inward at this part, In the same manner as in the first embodiment, air flows into the container through the path of the step-like steam vent groove 29 → the steam outlet 24.
One slit 26 may be used, but a plurality of slits 26 are preferable because a gap is easily formed. The position where the slit 26 is provided is also preferably near the vapor vent groove 29a from the viewpoint of enhancing the notch effect.

Embodiment 3

4 to 6 show the third embodiment only in parts different from the first embodiment.
4 is an exploded perspective view of the container of the present invention to which the third embodiment is applied, FIG. 5A is a longitudinal sectional view of the container of the present invention to which the third embodiment is applied, and FIG. It is a longitudinal cross-sectional view which shows the operating condition at the time of pressure reduction of the container of this invention applied. FIG. 5 is also a longitudinal sectional view when viewed from the direction of line 3-3 in FIG. FIG. 6 is an enlarged view showing an application example of the container of the present invention to which the third embodiment is applied with respect to the R portion of FIG.
In 3rd Embodiment, the rib 27 is provided in the upper surface of the cyclic | annular dent 21b of the cover body 2b so that it may make a round.

  In this embodiment, the lid 2b and the cap 3b are fitted in the recess 23b of the lid 2b. However, as shown in FIG. 5A, the annular recess 21b and the cap flange 31b are completely in close contact with each other. No. Therefore, when the internal pressure increases, the cap flange 31b is easier to lift than in the first and second embodiments. As is well known, the rib 27 has the effect of increasing the strength of the lid 2b, but on the other hand, it causes a change in the cross-sectional shape. A phenomenon occurs in which high stress is locally applied to one place and deformed more than other places. As a result, as shown in FIG. 5B, the container is deformed and a gap is formed between the cap 3b and the flange 31b, from which air enters the container, and the internal pressure of the container recovers. Even if it is instantaneous, if there is a gap with the outside, air flows in from there.

  When it is preferable that the annular dent and the cap flange are completely brought into close contact with each other, the same function can be achieved by providing a lower surface rib 27 'instead of the upper surface rib 27 as shown in FIG. In this case, since the steam does not always leak, the ribs may be provided intermittently.

Embodiment 4

Next, in FIG.7 and FIG.8, 4th Embodiment is shown only a different part from 3rd Embodiment.
7A is a perspective view of the cap of the present invention to which the fourth embodiment is applied, and FIG. 7B is an enlarged view of the R portion shown in FIG. 5A of the container of the present invention to which the fourth embodiment is applied. FIG. 8 is an enlarged view of a portion R showing another application example of the container of the present invention to which the fourth embodiment is applied.

Instead of providing ribs in the annular recess as in the third embodiment, the air introducing means is configured by providing ribs downward on the lower surface of the cap flange. In FIG. 7, a rib 33 protruding downward is provided on the lower surface of the flange 31 c of the cap 3 c so that the groove 33 ′ makes one round when viewed from above.
In this embodiment, since the cap 3c is reinforced in strength, it is possible when some part of the contact portion between the annular recess 21c of the lid 2c and the rib 33 of the cap 3c is deformed to the inside. Air is introduced into the interior through the gap.

  When it is preferable that the annular recess and the cap flange are completely brought into close contact with each other, an upper rib 33 'may be provided instead of the lower rib 33 on the cap flange as shown in FIG. Also in this case, as in the application example of the third embodiment, since the steam is not always discharged, the ribs may be provided intermittently.

Embodiment 5

Finally, FIG. 9 shows only the parts of the fifth embodiment different from the third and fourth embodiments.
FIG. 9 is a top view of the container of the present invention to which the fifth embodiment is applied.

In the third and fourth embodiments, the ribs are provided annularly or substantially annularly. However, in this fifth embodiment, the ribs 27 '' are formed in the flanges of the cap or the annular recesses of the lid in the radial direction. Has been.
The radial ribs are formed on the upper surface of the cap flange and on the lower surface of the annular recess of the lid so that steam is not always discharged.
Due to the notch effect at that portion, the same effects as those of the third and fourth embodiments can be obtained.

Note that the above embodiments can be used together or separately.
It goes without saying that detailed points such as the number and shape of the air introduction means during decompression of the present invention and the shape of the container are not limited to the above description, the embodiment, and the drawings. For example, the annular dent may be formed only by a rib that goes around the upper surface of the lid, and the height of the inner and outer surfaces thereof may be the same.

The disassembled perspective view of 1st Embodiment of this invention. (A) is a top view of the lid of the first embodiment of the present invention, (B) is a longitudinal sectional view taken along the line 3-3 in FIG. 2, showing the operating state during decompression of the first embodiment of the present invention. . The top view of the lid of a 2nd embodiment of the present invention. The disassembled perspective view of 3rd Embodiment of this invention. (A) is a longitudinal cross-sectional view of 3rd Embodiment of this invention, (B) is a longitudinal cross-sectional view which shows the operating condition at the time of pressure reduction of 3rd Embodiment of this invention. The expanded longitudinal cross-sectional view which showed the other application example of 3rd Embodiment of this invention. (A) is a perspective view of a cap to which a fourth embodiment of the present invention is applied, and (B) is an enlarged vertical sectional view of a main part of the fourth embodiment of the present invention. The expanded longitudinal cross-sectional view which showed the other application example of 4th Embodiment of this invention. The top view of the lid of a 5th embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: Bottom container 11: Storage part 2: Lid 21: Annular dent 22: Upper surface 23: Recess 24: Steam outlet 25: Tongue (air introduction means)
26: Slit (air introduction means)
27: Rib (air introduction means)
29: Steam vent groove 3: Cap with flange 31: Flange 33: Rib (air introduction means)
10: Container for microwave oven cooking

Claims (5)

In a microwave cooking container comprising a bottom container for storing ingredients, a lid fitted to the bottom container, and a flanged cap fitted to a recess provided at the center of the lid,
An annular recess is provided on the outer periphery of the recess of the lid, and the flange of the cap is fitted,
The annular recess or the flange of the cap is provided with air introducing means for preventing crushing during decompression,
Microwave cooking container.   The container for microwave oven cooking of Claim 1 in which the said air introduction means was formed of the tongue-shaped part extended inward from the outer-diameter side edge part of the said annular recess.   The container for microwave oven cooking of Claim 1 in which the said air introduction means was formed of the slit extended inside from the outer diameter side edge part of the said annular recess.   The container for microwave oven cooking of Claim 1 with which the said air introduction means was provided in the upper surface or lower surface of the said annular dent, or the flange lower surface or upper surface of the said cap with the rib.   The container for microwave oven cooking of Claim 4 which is a shape where the rib of the lower surface of the said annular dent or the flange upper surface of the said cap is intermittent.

Images