JP2001002108A - Suction and exhaust structure for sealed-up container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make suction and exhaust executable smoothly anytime without making an air exhaust passage blocked with contents. SOLUTION: A fitting indent 8 is provided at the inside of a lid body 6, an air induction passage 13 is provided at the fitting indent 8 and an air exhaust passage 16' is opened at a valve seat 15 around the fitting indent 8, an elastic valve plate 17 of a valve disc 9 fixed to the fitting indent 8 so as to move vertically is stuck close to the valve seat 15, the air exhaust passage 16' is closed with the valve plate 17, a lip part 17a of the valve plate 17 is elastically deformed and separated from the valve seat 15 when the internal pressure decreases, and the lip part 17a is separated from the valve seat with the valve plate 17 fitted into the fitting indent 8 when the internal pressure increases.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction / exhaust structure for a closed container for storing foods and the like.

[0002]

2. Description of the Related Art When a lid is hermetically sealed over a container containing food such as heated juice, when the contents are cooled, the internal pressure is reduced and the lid may be difficult to open. When the contents are heated with a microwave oven or the like after the cover is placed, the internal pressure may increase and the container may burst. In order to solve such a problem, a lid has been conventionally provided with an intake / exhaust structure.

[0003] In order to make the above-mentioned intake and exhaust structure simple, it is known to use a valve element having a single structure made of an elastic body (Japanese Utility Model Publication No. 2-6889, Japanese Utility Model Publication No. 7-381).
No. 76). In this case, the intake / exhaust structure is such that a flange-shaped valve plate made of an elastic body is provided at each of the upper and lower portions of the valve shaft of the valve body, the air introduction passage is closed by the lower valve plate, and the air discharge passage is closed by the upper valve plate. It is designed to be closed. When the internal pressure falls below a certain level, the lower valve plate elastically deforms to open the air introduction passage, and conversely, when the internal pressure rises above a certain level, the upper valve plate elastically deforms to open the air discharge passage. ing.

[0004]

As described above, the use of a single-structured valve has the advantage of simplifying the intake / exhaust structure. However, since the air discharge passage is always open inside the container, the use of a valve is not required. There is a disadvantage that fine solid contents or viscous flowable contents enter the air discharge passage and close the passage due to vibration or the like during carrying.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an air intake / exhaust structure for an airtight container in which the air exhaust passage is always closed and the air exhaust passage can be smoothly carried out without being blocked.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a lid for closing a container body, which is provided with a valve for air intake and exhaust which is automatically opened and closed by an internal and external pressure difference. In the air intake / exhaust structure for a closed container, a fitting recess in which the valve body fits is provided on the inner surface of the lid body, and an air introduction passage communicating with the fitting recess and the outer surface of the lid body with the lid body, and a valve shaft insertion. A hole is provided, an air discharge passage communicating with the outer surface of the lid is provided in a valve seat around the fitting recess, and a valve shaft of the valve is penetrated through the valve shaft insertion hole so as to be vertically movable. The air introduction passage is closed by a valve plate having elasticity integral with the valve plate, and the air discharge passage is closed by pressing the outer peripheral portion of the valve plate against the valve seat.

The fitting recess is formed in a concave spherical shape, and the valve plate is formed as a flat plate parallel to the inner surface of the lid. When the internal pressure of the container body rises, the valve plate is set in the fitting recess. Can be elastically deformed along the inner surface of the valve plate, and the outer peripheral portion of the valve plate is separated from the valve seat with the elastic deformation.

Further, the fitting recess is formed in a concave spherical shape, and the valve plate is formed in a curved shape bulging inward of the container body, and the valve plate is provided when the internal pressure of the container body increases. The plate may be elastically deformed along the inner surface of the fitting recess, and the outer peripheral portion of the valve plate may be separated from the valve seat with the elastic deformation.

Further, the air discharge passage is formed by a groove provided on the inner wall surface of the fitting recess, one end of the groove communicates with the air introduction passage, and the other end is opened to the valve seat. Alternatively, a configuration in which the air introduction passage is communicated with the valve shaft insertion hole can be employed.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a heat-insulated lunch container as an example of a closed container. In a heat-insulated container 1 with a lid, upper and lower three-stage inner containers 2, 3, and 4 are housed in a freely removable manner. . The lower inner container 2 is a soup container, in which a lid 6 is put on the container body 5 in a sealed state, and the lid 6 is provided with a suction / exhaust structure 7.

FIG. 2 shows a first embodiment of the above-described intake / exhaust structure 7.
Shown in In the intake / exhaust structure of the first embodiment, a concave spherical fitting recess 8 is provided on the inner surface of the lid 6, and an insertion hole 12 for the valve shaft 11 of the valve body 9 is provided in the center of the fitting recess 8. Can be On the side of the insertion hole 12, an air introduction passage 13 is provided from the outer surface of the lid 6 to the inner surface of the fitting recess 8.

A range of a fixed width a surrounding the fitting recess 8 from the opening peripheral edge 14 of the fitting recess 8 is a valve seat 15.
An air discharge passage 16 is provided between the valve seat 15 and the outer surface of the lid 6.
Is provided.

The valve body 9 has a disc-shaped valve plate 17 at the lower end of the valve shaft 11 and a retaining head 18 at the upper end. The valve body 9 is formed of an elastic member made of a simple rubber or a composite material with another material. By appropriately setting the length of the valve shaft 11, the retaining head 18 is attached to the lid 6.
The lip 17a on the outer peripheral portion of the valve plate 17 is brought into close contact with the valve seat 14 with a predetermined pressing force in a state in which the lip 17a is in contact with the outer surface of the valve plate 17.

The first embodiment is as described above.
In a normal state where the lid 6 is fitted to the container body 5, the valve 9
The valve plate 17 closes both the air introduction passage 13 and the air discharge passage 16, so that the inflow and outflow of air is prevented within a range where the pressure difference between the inside and outside does not exceed the pressing force of the lip portion 17a. In addition, even if vibrations or the like act, the contents may be in these passages 13, 1.
6 does not invade.

When the internal pressure is reduced to a certain level or more due to cooling of the contents or the like, the external air introduced from the air introduction passage 13 pushes open the lip portion 17a and is introduced into the inside (FIG. 2 (a) 2). See dotted line). When the internal pressure rises due to the introduction of external air, the lip portion 17a returns to its original state due to its elasticity.

When the internal pressure rises due to heating in a microwave oven or the like, the valve plate 17 is pushed up, and as shown in FIG. Fit into the inner wall. At this time, the lip portion 17a of the valve plate 17
Rises with the opening edge 14 of the fitting recess 8 as a fulcrum, and separates from the valve seat 15. As a result, the air discharge passage 16 is opened, and the internal air is discharged to the outside through the air discharge passage 16. When the internal pressure decreases due to the discharge of the internal air, the lip portion 17a returns to its original state due to its elasticity.

In the second embodiment shown in FIG. 3, the air discharge passage 16 'is formed by a groove provided on the inner wall surface of the fitting recess 8. One end of the air discharge passage 16 ′ communicates with the lower end of the air introduction passage 13, and the other end is connected to the valve seat 1.
Opened to 5. Other configurations are the same as those in the first embodiment.

In this case as well, the air introduction passage 13 and the air discharge passage 16 'are closed by the valve plate 17 in a normal state, but when the internal pressure decreases, the lip 17a is deformed to introduce external air. When the internal pressure rises, the valve plate 17 is elastically deformed and fitted into the fitting recess 8, and at the same time, the lip portion 17a
Rises to discharge the internal air to the outside through the air discharge passage 16 ′ and the air introduction passage 13.

In the second embodiment, the air introduction passage 13
Not only acts as a passage for introducing external air,
It also acts as a passage for discharging internal air. as a result,
Compared to the case of the first embodiment, the number of air passages penetrating through the lid 6 can be reduced.

In the third embodiment shown in FIG. 4, the shape of the valve plate 17 is formed so as to be curved so as to protrude inward of the container body 5. In the case of the third embodiment, the air introduction passage 13 is provided close to the insertion hole of the valve shaft 12, and the two are communicated. Other configurations are the same as in the second embodiment.

The lip 17a of the valve body 9 is pressed against the valve seat 15 outside the open end of the air discharge passage 16 'in a normal state. In this case, even if the length of the valve stem 11 is slightly shorter than the specified value, the lip portion 17a
Since this is the direction in which the sealing force is increased, there is an advantage that the degree of freedom in design is greater than that in the first and second embodiments.

The valve body 9 having the valve plate 17 bent as described above can be used as the valve body 9 of the intake / exhaust structure 7 of the first and second embodiments.

In the fourth embodiment shown in FIG. 5, the air discharge passage 16 'is provided in a cross shape, and the other configuration is the same as that of the third embodiment. By providing a plurality of air discharge passages 16 ', the flow of air can be made smooth.

[0025]

As described above, according to the present invention, the air discharge passage is opened to the valve seat, and the air discharge passage is closed by bringing the valve plate into close contact with the valve seat. It is possible to prevent the contents of the container from intruding into the container, and to perform stable intake and exhaust.

[Brief description of the drawings]

FIG. 1 is a sectional view of an insulated lunch container.

2A is an enlarged cross-sectional view of the first embodiment. FIG. 2B is a plan view of the first embodiment. FIG.

FIG. 3A is an enlarged cross-sectional view of the second embodiment; FIG. 3B is a plan view of the same; FIG.

4A is an enlarged cross-sectional view of the third embodiment, FIG. 4B is a plan view of the same, and FIG.

5A is an enlarged sectional view of a fourth embodiment, FIG. 5B is a plan view of the same, and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulated container 2 Inner container 3 Inner container 4 Inner container 5 Container body 6 Lid 7 Inlet / exhaust structure 8 Fitting recess 9 Valve 11 Valve shaft 12 Insertion hole 13 Air introduction passage 14 Opening periphery 15 Valve seat 16, 16 'air Discharge passage 17 Valve plate 17a Lip portion 18 Retaining head

Claims (5)

[Claims] 1. A suction / exhaust structure for a closed container comprising a lid for sealing a container body and a valve for air intake / exhaust which is automatically opened / closed by an internal / external pressure difference, wherein the valve is provided on an inner surface of the lid. A fitting recess into which the body fits is provided, an air introduction passage communicating with the fitting recess and the outer surface of the lid is provided in the lid, and a valve shaft insertion hole is provided. A valve seat around the fitting recess is provided with the lid. An air discharge passage communicating with the outer surface is provided, a valve shaft of the valve body is vertically penetrated through the valve shaft insertion hole, and the air introduction passage is closed by a valve plate having elasticity integral with the valve shaft. And an air discharge / exhaust structure for a sealed container, wherein an outer peripheral portion of the valve plate is pressed against the valve seat to close the air discharge passage. 2. The fitting recess is formed in a concave spherical shape, the valve plate is formed as a flat plate parallel to the inner surface of the lid, and the valve plate is fitted with the fitting when the internal pressure of the container body rises. 2. The air intake / exhaust structure for an airtight container according to claim 1, wherein an elastic portion is elastically deformed along the inner surface of the recess, and the outer peripheral portion of the valve plate is separated from the valve seat with the elastic deformation. 3. The container according to claim 2, wherein said fitting recess is formed in a concave spherical shape, and said valve plate is formed in a curved shape bulging inwardly of said container body. 2. The sealed container according to claim 1, wherein the plate is elastically deformed along the inner surface of the fitting recess, and the outer peripheral portion of the valve plate is separated from the valve seat with the elastic deformation. Intake and exhaust structure. 4. The air discharge passage is formed by a groove provided on the inner wall surface of the fitting recess, one end of the groove communicates with the air introduction passage, and the other end is opened to the valve seat. The air intake / exhaust structure for a closed container according to any one of claims 1 to 3, characterized in that: 5. The air intake / exhaust structure for a sealed container according to claim 1, wherein the air introduction passage communicates with the valve shaft insertion hole.