JPH026889Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to airtight containers, and in particular to improvements in airtight containers that can be heated in a microwave oven with the lid on and that are easy to remove when the pressure inside the airtight container is reduced. be.

(Prior art) Containers that keep the inside airtight are well known, but since the purpose is to keep the inside airtight, when the contents are heated in a microwave oven, the internal pressure has no place to escape, and in extreme cases, it can burst due to excessive pressure rise. If you do this, the lid may fly off. Conventional airtight containers that prevent the lid from becoming difficult to open due to internal negative pressure are well known (Japanese Utility Model Publication No. 59-43238).
(No.), nothing is known to release internal pressure.

(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. It is an object of the present invention to provide a closed container which can be thawed and cooked, and which can introduce air when negative pressure is generated inside.

(Technical Means) The present invention that achieves the above object has a valve mounting port 4 opened in the lid 3 that seals the container body 1 via a sealing member 2, and an upper valve that tightly fits around the mouth from above and below to prevent ventilation. A pressure regulating valve 8 consisting of a lower valve part 5, a lower valve part 6, and a shaft part 7 that fits into the valve mounting port 4 is attached to the valve mounting port 4, and an air vent that opens inward and is closed by the upper valve part 5. The airtight container is characterized by being provided with a passage 9 and an air introduction passage 10 that opens to the outside and is closed by the shaft portion 7 or the lower valve portion 6.

(Function of the invention) Since the container of the invention has a configuration in which a pressure regulating valve 8 is attached to a valve attachment port 4 opened in the lid 2,
When the internal pressure of the container rises above the set value, the air vent passage 9 opened inside acts on the upper valve part 5 to push it open, and when the valve opens, the increased internal pressure is released from the vent 4. On the contrary, when negative pressure is generated inside, the air introduction passage 10 opened to the outside is closed by the lower valve part 6 or the shaft part 7, so when the regulating valve 8 is pressed, the inside and outside are communicated, and the differential pressure is reduced. Eliminate.

(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 11 is provided on the periphery of the lower surface of the lid in contact with the periphery of the main body opening. Seal member 2 fitted there
The interior is hermetically sealed, and the lid is fixed in a sealed state so that it will not come off by lid fixing members 12, 12 provided on both sides of the main body. 13 is a shaft of the fixing member 10, and 14 is a locking hole in the fixing member 12, which locks with locking pieces 15 protruding from both sides of the lid 3. 16 is a bearing protrusion on the main body side into which the shaft 13 is fitted. Each member is made of highly heat-resistant resin, glass, ceramic, etc.

The pressure regulating valve 8 illustrated in FIGS. 2 to 6 is
A valve mounting hole 4 is provided at the bottom of the valve housing recess 17 formed in the lid 3.
On the other hand, it has a shaft portion 7 thick enough to close this valve mounting port 4, and an upper valve portion 5 and a lower valve portion 6 that sandwich the valve mounting port 4 from the outside and the inside. They fit together at the shaft portion 7, and are made entirely of a flexible material.
The internal pressure release mechanism consists of an upper valve part 5 which is elastically deformed by positive internal pressure, and an air vent passage 9 whose outer end is disposed in a portion closed by the upper valve part 5 immediately below the upper valve part 5. In addition, the mechanism for eliminating the prevention of release of the lid 3 due to negative pressure has a square-shaped air introduction passage 10 provided in the shaft portion 7 up to the middle of the valve mounting port 4, and the upper part of the regulating valve 8 is operated by pressing. This allows the lower end of the air introduction path 10 to be communicated with the inside of the container, allowing external pressure to be introduced into the container and eliminating negative pressure.

The internal pressure release mechanism described above and the external pressure introduction mechanism that eliminates the prevention of lid release function by being incorporated into the small pressure regulating valve 8 described above, so that even if the internal pressure is reduced, the difference with the external pressure can be easily adjusted. It is not difficult to open the lid 3 because the pressure is released, and the pressure regulating valve 8 automatically operates when the internal pressure increases due to heating.

In Fig. 7, the lower valve part 6 is formed to be thin and sensitive, and the air introduction passage 10 is extended to the lower valve part 6, so that not only the internal pressure release mechanism but also the external pressure introduction mechanism is automatically activated. This is an example. With this configuration, both pressure rise and pressure reduction within the container body are automatically eliminated, making handling easier. The air bleed passage 9 and the air introduction passage 10 can also be constructed by providing grooves 9' and 10' in the mouth wall of the valve mounting port 4 (FIG. 8). In that case, the valve 8 may be provided with a portion of the air vent passage 9 and the air introduction passage 10 communicating with each groove 9'10'.

(Effect of the invention) Therefore, according to the present invention, when the internal pressure of the container increases, the pressure regulating valve 6 automatically operates to release the internal pressure, so that the contents inside the container can be heated, for example, when using a microwave oven. Since there is an effect that heating can be performed as is without removing the lid 3, there is no problem when performing ultrasonic heating with the lid 3 opened.On the other hand, when the internal pressure decreases, the pressure adjustment valve 8 can be pressed. It is very easy to handle and safe because outside air easily flows into the main body and differential pressure is eliminated.

[Brief explanation of the drawing]

The drawings relate to the sealed container according to the present invention.
Figure 1 is an overall perspective view, Figure 2 is a partially cutaway side view,
Fig. 3 is an enlarged sectional view of one embodiment of the pressure regulating valve, Fig. 4 is a plan view of the valve section, Figs. 5 and 6 are sectional views explaining the operation, and Fig. 7 is another embodiment. FIG. 8 is a sectional view showing a modification of the air vent passage and the introduction passage. 1... Container body, 2... Seal member, 3...
Lid, 4...Valve mounting port, 5...Upper valve part, 6...Lower valve part, 7...Shaft part, 8...Pressure adjustment valve, 9...Air vent passage, 10...Air introduction passage, 9', 10'...
groove.

Claims (1)

[Scope of utility model registration request] A valve mounting port 4 is opened in a lid 3 that seals the container body 1 via a sealing member 2, and an upper valve portion 5 and a lower valve portion 6 that fit closely to the periphery of the mouth from above and below to prevent ventilation, and the valve mounting port 4 are provided. A pressure regulating valve 8 consisting of a shaft portion 7 that fits into the
is attached to the valve mounting port 4, and an air bleed passage 9 that opens inward and is closed by the upper valve part 5, and an air introduction passage 10 that opens to the outside and is closed by the shaft part 7 or the lower valve part 6. An airtight container characterized by: