JPH0523492Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a closed container, and particularly to a closed container that can be heated in a microwave oven with the lid closed.

(Prior art) Containers that keep the inside airtight are well known, but since the purpose is to keep the airtight airtight, when the contents are heated in a microwave oven, the internal pressure has no escape, and in extreme cases, it can be caused by excessive pressurization. The lid may fly off as if to burst. Conventional airtight containers that prevent the lid from becoming difficult to open due to internal negative pressure generated when the contents cool are known (Utility Model Publication No. 59-43238), but there are no known containers that release internal pressure. Not yet.

(Technical Problem) The present invention solves the above problem, and its purpose is to smoothly release internal pressure even if it increases, so that it can be used in a microwave oven without removing the lid. To provide an airtight container that can be thawed and cooked.

(Technical Means) The object is to consist of a container main body 1 and a removable lid 3 that seals the opening part of the container via a sealing member 2, and a pressure adjustment mechanism is provided for the inside of the container sealed by the lid 3. In order to release the internal pressure of the container, a valve accommodating portion 15 with a vent hole 4 that communicates between the inside and outside of the sealed container is provided on the underside of the lid 3, and the vent hole 4 is opened from the outside. Valve pieces 5a and 5b are provided to abut and close the valve pieces, and the valve pieces 5a and 5b are brought into elastic contact with the vent hole 4, and the valve pieces 5a and 5b are allowed to retreat due to an increase in internal pressure during heating. A resilient means is provided, and the resilient means and the valve pieces 5a, 5
A vent hole 4 that supports b and opens due to the increase in internal pressure.
A positive pressure release mechanism 6 having a pressure release path 7 for discharging the airflow discharged from the vent to the outside of the device is connected to the vent 4.
A lower plate 25 is provided on the outside of the container, and in order to eliminate the decrease in the internal pressure of the container, a lower plate 25 contacts a port 29 that communicates inside and outside the container from inside the container to close the port 29, and an upper plate for operation that is fixed to the outside of the container. This is achieved by providing a negative pressure resolving mechanism 28 made of a flexible material on the underside of the lid 3 and integrally provided with the negative pressure resolving mechanism 28.

(Function of the invention) The container of the invention has a structure in which the vent 4 opened in the lid 2 is elastically closed from the outside by the valve pieces 5a and 5b as a pressure adjustment mechanism for the inside of the sealed container. When the internal pressure rises above a set value, the internal pressure acts on the valve pieces 5a, 5b through the vent 4 and forces them open, thereby maintaining the balance of the external pressure. Therefore, even if the internal pressure increases when the food inside the main body is heated in a microwave oven or the like, it can be gradually released through the vent 4. On the other hand, as another pressure adjustment mechanism, a negative pressure resolving mechanism 28 is connected to the lid 3.
The lower plate 2 is installed when the inside of the sealed container becomes negative pressure.
5 flexes to balance the external pressure, so the differential pressure between the inside and outside is always minimized. Since the positive pressure release mechanism 6 and the negative pressure release mechanism 28 that constitute the pressure adjustment mechanism are both provided under the lid 3, there is no protrusion on the top surface of the lid 3, and therefore it is possible to stack sealed containers.

(Example) To explain with the illustrated example, the container main body 1 and its lid 3 are box-shaped ones formed for a lunch box, and a groove 9 is provided on the periphery of the lower surface of the lid in contact with the periphery of the main body opening. The interior is hermetically sealed by the sealing member 2 fitted therein, and the fixing members 10, 10 of the lid 3 provided on both sides of the main body hold the lid in a sealed state so that it does not come off. 11 is the axis of the fixing member 10; 12
is a locking hole of the fixing member 10, which locks with locking pieces 13 protruding from both sides of the lid 3. 14 is a bearing protrusion on the main body side into which the shaft 11 is fitted. Note that each member is made of resin with high heat resistance.

For the internal pressure of the sealed container, a pressure adjustment mechanism is provided which includes a positive pressure release mechanism 6 corresponding to positive pressure and a negative pressure resolving mechanism 28 corresponding to negative pressure.

The positive pressure release mechanism 6 is provided so as to close the vent hole 4 of the lid 3 from the outside, and is constructed as shown in FIGS. 3 to 6. In the example shown in FIG. 3, a valve accommodating portion 15 is recessed in the lid 3, and a hemispherical valve piece 5a with the upper part of the lip serving as a valve seat is arranged in the vent 4 provided at the bottom of the lid 3, and the valve piece 5a is elastically abutted. As a means, a spring 8 fitted to the valve shaft 16 is compressed between the valve cover 17 which is a valve receiving member, and the valve cover 1
A pressure release path 7 communicating between the inside and the outside of the valve is formed on the lower surface of the valve lid 17. The example shown in FIG.
A valve seat member 19 having a ventilation hole 4 is fixed to the inner end of the valve housing part 15,
The mounting structure of the valve piece 5a is the same as the example shown in FIG. In the example shown in FIG. 5, a valve mounting cylinder 20 is provided on the lower surface of the lid 3, the center thereof is used as a valve housing part 15, and a valve seat member 21 having a vent hole 4 is used as a valve receiving member.
0, and a spherical valve piece 5b is elastically loaded in the vent hole 4 by a spring 8 contracted in the valve housing part 15, and the pressure release path 7 is opened in the lid 3 facing the valve housing part 15. There is.

In each of the above examples, in the case of FIG.
is attached to the recessed stepped portion 31 of the valve accommodating portion 15 recessed in the lid 3 by adhesive, heat welding, or other known means, and in the example shown in FIG. The valve cover 17 is attached to the cover 3 by means of a screw means 32 which is formed as an opening in the housing portion 15 and screwed into the internal threaded portion, and in the example shown in FIG.
The valve seat member 21 is attached to the lid 3 by a screw means 33 that screws an upwardly facing male threaded portion into a female threaded portion provided inside the valve mounting cylinder 20. In addition, in the case of FIGS. 3 and 4, the positive pressure is released from the gap 26 between the valve lid 17 and the valve accommodating portion 15 in which it is disposed.

Reference numeral 28 in FIG. 2 indicates a negative pressure release mechanism, which is provided with a port 29 in the lid 3 separately from the pressure release valve 6 shown in FIGS. 2 to 5. This negative pressure resolving mechanism 28 closes a vent 29 with a shaft portion 23 and plates 24 and 25 provided above and below the shaft portion, and introduces outside air through a ventilation groove 27 by pressing the upper plate 24.
0 indicates a protrusion on the lower plate 25. Negative pressure release mechanism 28
By providing this, even if the hot stored items cool down and the inside becomes depressurized, the differential pressure with the outside air pressure is easily eliminated, and the lid 3 will not be dented or difficult to open. Of course, when heating again, the positive pressure release mechanism 6
It is very easy to handle because only the chisel operates. In the above example, only the case where the valve piece 5 is integrated with other constituent members of the positive pressure release mechanism 6 is shown, but the valve piece 5 and the valve receiving member 17 are formed integrally through a spring portion. It is also possible to do so.

(Effect of the invention) Therefore, according to the present invention, when the internal pressure of the container increases, the positive pressure release mechanism 6 automatically operates to release the internal pressure. Even if it is used and heated, the lid 3 will close due to the increase in internal pressure.
This did not lead to a situation where the device exploded and flew away.
Therefore, it has the effect of heating the container as it is without removing the lid 3, and conversely, when the internal pressure of the container decreases, the negative pressure relief mechanism 28 automatically operates and introduces external pressure into the container, allowing the contents to cool down. Even if the internal pressure decreases, the lid 3 will not stick to the container body 1.
Since the lid 3 can be easily removed, there is no need to struggle to open the lid 3, and the sealed container can be used without worrying about positive and negative pressure changes, making it very easy to handle and safe.

[Brief explanation of the drawing]

The drawings relate to the sealed container according to the present invention.
Figure 1 is a perspective view, Figure 2 is a partially cutaway side view, and Figure 3 is a partially cutaway side view.
5 to 5 are sectional views showing three embodiments of the pressure release valve, and FIG. 6 is a plan view of the example shown in FIG. 3. 1... Container body, 2... Seal member, 3...
Lid, 4...Vent, 5, 5a, 5b...Valve piece, 6
. . . Positive pressure release mechanism, 8 . . . Spring serving as elastic means.

Claims (1)

[Claims for Utility Model Registration] (1) Container body 1 and its opening portion sealed by a sealing member 2
It consists of a removable lid 3 that seals through the
In an airtight container for food that is equipped with a pressure adjustment mechanism for the inside of the container sealed by the lid 3,
In order to release the internal pressure of the container, a valve accommodating portion 15 with a vent 4 communicating between the inside and outside of the sealed container is provided on the lower side of the lid 3, and valve pieces 5a and 5b abut the vent 4 from the outside to block it. are provided, and the valve pieces 5a, 5
b elastically abuts against the vent 4, and also provides elastic means for allowing the valve pieces 5a, 5b to retreat due to an increase in internal pressure during heating, supporting the elastic means and the valve pieces 5a, 5b, A positive pressure release mechanism 6 having a pressure release path 7 for discharging the airflow discharged from the vent 4 opened due to the increase in the internal pressure to the outside of the container is provided outside the vent 4, and a decrease in the internal pressure of the container is eliminated. For this purpose, a flexible material is constructed in which a lower plate 25 that contacts a port 29 connecting the inside and outside of the container from inside the container and closes the port 29, and an upper plate for operation that is fixed to the outside of the container are integrally provided. A closed container characterized in that a negative pressure resolving mechanism 28 is provided on the lower side of the lid 3. (2) The airtight container according to claim 1, wherein the valve pieces 5a and 5b are resiliently abutted against the vent 4 by means of a spring 8, which is a resilient means. (3) The airtight container according to claim 1, wherein the upper surface of the lid 3 provided with the positive pressure release mechanism 6 and the negative pressure release mechanism 28 is substantially flat.