JP2003246341A - Resin-made container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin-made container having a gas-exhausting means which can exhaust only the gas generated in the container outside the container while preventing any leakage of liquid content. <P>SOLUTION: The resin container comprises a container body 2 and a resin lid 4 fitted to a fitting part of the container body, the lid is provided on a face part, and has a gas-emitting means 3 to emit the gas in the container outside the container, the gas-emitting means has a projecting part which is projected inward of the container from an area including a gas vent hole 6 in the face part and integrated with the face part, the projecting part has a notch to form a gas vent groove 7 which is closed at the pressure when the internal pressure in the container is below a predetermined value, and communicates the gas vent hole with the inside of the container by the elastic deformation when the internal pressure in the container is not less than the predetermined value. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a container, and in particular,
The present invention relates to a resin container provided with a degassing unit that releases fermentation gas or the like generated in a container by aging kimchi or the like of pickled food contained in the container to the outside of the container.

[0002]

2. Description of the Related Art In general, pickled foods such as kimchi produce fermentation gas by aging in a container. This fermentation gas discolors the contents and affects the storability and the taste of the contents. Further, in the case of containing a content such as a chemical product that generates high-pressure gas in the container, when the gas expands in the container, the higher the airtightness of the container,
The bottom surface or lid of the container may bend, leading to damage to the container. Therefore, in the case where the contents that generate gas are contained in the container, a container provided with a degassing means for appropriately discharging the high pressure gas to the outside of the container is used. [First Example] A first example of a conventional resin container provided with a gas venting means is configured to have a container body and a concave lid that covers the mouth of the container body. On the outer peripheral edge of the mouth of the container body and the inner peripheral edge of the lid, male threads and female threads are provided respectively, and by completely tightening both screws,
The food in the container is sealed. As a degassing means for fermenting gas of foods, degassing recesses are provided at several locations on the lower surface edge of the lid with which the mouth of the container body abuts. [Second Example] A second example of a resin container provided with a conventional gas venting means is, as described in Japanese Patent Application Laid-Open No. 2000-302156, as a fermenting gas venting means, a mouth portion of a container body. A flexible tongue is provided on a portion of the inner upper edge of the lid that contacts the lid. In this container, when the internal pressure of the container rises due to the fermentation gas when the container body and the lid are in a closed state, the flexible tongue that normally closes the gap between the mouth of the container body and the lid makes this gap. Elastically deforms to open. As a result, the fermentation gas flows in this gap,
It is released to the outside of the container.

[0003]

However, in the first example of the conventional resin container equipped with the gas venting means, when the container body and the lid are fastened, the container body is provided with several recesses for venting gas. There are several gaps at the contact portion between the mouth and the lower edge of the lid, and the hermeticity between the container body and the lid is poorer than in a container without a recess in the gas venting means. For this reason,
When the container rolls upside down or is turned upside down, there is a problem in that the liquid of the food in the container leaks through these gaps. Further, in the second example of the conventional resin container provided with the gas venting means, the flexible tongue is easily deformed, and the container main body and the lid are not tightly sealed, so that liquid leakage of the contents is prevented. It is difficult to prevent completely. Therefore, in the above-mentioned first and second examples of the resin-made container provided with the conventional gas venting means, the problem that the liquid leakage of the contents occurs through the gas venting means is still sufficiently solved. I haven't arrived.

[Object of the Invention] Therefore, the present invention has been made to solve the problems of the prior art, and maintains a higher hermeticity than a conventional container provided with a gas venting means, and the liquid content An object of the present invention is to provide a resin container provided with a gas venting means capable of releasing only the gas generated in the container to the outside of the container while preventing leakage.

[0005]

In order to achieve the above-mentioned object, the present invention provides a resin container provided with a container body and a resin lid fitted to a fitting portion of the container body. The lid is provided on the surface thereof, and has a gas venting means for releasing the gas in the container to the outside of the container. The gas venting means projects inward from the region including the gas venting hole of the surface. , And has a convex portion formed substantially integrally with the surface portion, and the convex portion closes at a pressure below the predetermined pressure of the container, and when the internal pressure of the container reaches a pressure equal to or higher than a predetermined pressure, gas is generated by elastic deformation. It is characterized by having a notch that forms a gas vent groove that connects the vent hole and the interior of the container. In the resin container of the present invention configured as described above, when the contents generate gas in the container and the internal pressure of the container rises, the gas is released to the outside of the container through the gas vent hole through the notch. It Therefore, it is possible to suppress the deformation of the container and the influence on the storability of the contents due to the increase in the internal pressure of the container. Further, the notch is degassed which is opened when the internal pressure of the container reaches a pressure higher than a predetermined value, causes the gas in the container to be delivered to the gas vent hole, and closes when the internal pressure of the container returns to a pressure lower than the predetermined value after opening It has a function like a valve. Therefore, compared to the conventional resin container having the gas venting means, it is possible to sufficiently maintain the tightness between the container body and the lid, and to release the gas to the outside of the container while preventing liquid leakage. Further, since the lid and the gas venting unit are integrally molded, the container can be easily manufactured, and the manufacturing cost of the container can be reduced.

Further, in the present invention, preferably, the gas venting means is provided at only one location on the surface portion of the lid. As a result, the outside air does not flow into the container from the outside of the container through the gas vent hole to cause liquid leakage of the container. Also,
In the present invention, preferably, the convex portion has a cylindrical shape, and the convex portion may have a polygonal prism. As a result, the degree of freedom in designing the degassing means is increased. Further, in the present invention, preferably, one notch may be provided in the convex portion, and two notches may be provided so as to intersect the convex portion. As a result, the number and arrangement of the cuts can be freely changed, and the container can be degassed with an appropriate cut arrangement. In the present invention,
Preferably, the width of the notch is smaller than the maximum dimension of the vent hole. This can prevent the liquid in the container from entering the gas vent hole. Further, in the present invention, preferably, the thickness of the protrusion in the extending direction of the cut is larger than the thickness of the surface portion. This allows the convex portion of the gas venting means to have appropriate flexibility such that the convex portion opens and closes the cut according to the internal pressure of the container.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. First, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic perspective view showing a resin container according to the first embodiment of the present invention. Figure 1
1, reference numeral 1 indicates the container according to the present embodiment,
This container 1 is a plastic container body 2 for containing pickled foods such as kimchi that generate fermentation gas by aging.
And a plastic lid 4 for sealing the container body 2
And are equipped with. A male screw 10 is provided on the outer peripheral edge of the mouth 8 of the container body 2, and a female screw 14 that engages with the male screw 10 is provided on the inner peripheral edge of the mouth 12 of the lid 4. Furthermore, the degassing means 3 for discharging the fermentation gas generated from the food in the container is provided only at one location near the outer peripheral edge of the upper surface of the lid 4.

Next, FIG. 2 is a sectional view of the container 1 taken along the line AA in FIG. 1 in a state where the male screw 10 of the container body 2 and the female screw 14 of the lid 4 in FIG. 1 are completely tightened.
As shown in FIG. 2, the degassing means 3 is formed by forming a downwardly convex valve portion 16 on the peripheral portion of the surface portion 5 of the lid 4. Also,
The surface portion 5 and the valve portion 16 of the lid 4 are integrally formed by injection molding with a plastic material such as polypropylene or polyethylene.

FIG. 3 is an enlarged sectional view of the degassing means 3 taken along the line BB in FIG. As shown in FIG. 3, the gas passing means 3 has a gas venting outer hole 6 which vertically penetrates the surface portion 5 of the lid 4 and a first gas venting hole which vertically penetrates the valve portion 16 and communicates with the gas vent hole 6. The groove 7 is further provided.
The central axis 18 of the first gas vent groove 7 coincides with the central axis 18 of the gas vent hole 6. Furthermore, the vertical length d1 of the gas vent hole 6 is equal to the thickness of the surface portion 5 of the lid 4, and the vertical length d2 of the first gas vent groove 7 is preferably
The length is twice the d1 or more.

FIG. 4 is an enlarged plan view of the gas venting means 3 of FIG. 3, and FIG. 5 is an enlarged bottom view of the gas venting means 3 of FIG. As shown in FIGS. 4 and 5, the gas vent hole 6
Is D1, the diameter of the valve portion 16 is D2, and the width of the first degassing groove 7 is w1. As an example, when the maximum diameter of the lid 4 of the container 1 is 114 mm, the gas vent hole 6
Has a diameter D1 of 1 mm or less, and the valve portion 16 has a diameter D2 of 5 m.
m, the width w1 of the first degassing groove 7 is set to a dimension of 0.1 mm or less. Further, the gas vent hole 6 and the first gas vent groove 7 are also integrally molded with the lid 4 and the valve portion 16 by a mold for injection molding.

Next, the operation of the first embodiment of the present invention will be described. In the resin container according to the first embodiment of the present invention configured as above, the pickled food such as kimchi enclosed in the container body 2 and the lid 4 and stored in the container 1 is aged with the passage of time. And continue fermentation. At this time, the fermentation gas generated by this fermentation fills the container 1 and the internal pressure of the container 1 rises above the atmospheric pressure outside the container 1. Therefore, the fermentation gas begins to flow into the first gas vent groove 7 from the inside of the container 1 toward the outside due to the pressure difference from the atmospheric pressure. FIG. 6 is a view showing in principle the working state of the gas venting means 3 when the gas begins to flow into the first gas venting groove 7. In addition, the arrow in FIG. 6 has shown the flow of gas. Once the gas begins to flow into the first degassing groove 7, the valve portion 16 is elastically deformed by the pressure of the gas flowing from the inside of the container to the outside of the container as shown in FIG. The width of the degassing groove 7 is expanded. Fermentation gas filled in the container flows into the expanded first degassing groove 7 one after another, the fermentation gas flows from the first degassing groove 7 to the degassing hole 6, and finally the outside of the container. Is released to. When the internal pressure of the container drops to a predetermined pressure, the elastic deformation of the valve portion 16 is released, and the width of the first gas vent groove 7 returns to the original narrow state.

Further, when two or more gas venting means are provided on the surface portion 5 of the lid 4, the air inside and outside the container can easily flow in and out, so that the liquid easily leaks from the inside to the outside of the container. However, in this embodiment, the arrangement of the gas vent holes 6 is limited to one location, and the width w of the first gas vent groove 7 is reduced.
Since 1 is also a small gap, no liquid leaks out of the container. Therefore, as compared with a conventional resin container having a gas venting means, the container body and the lid are sufficiently sealed,
Only the fermentation gas in the container can be released to the outside of the container without causing liquid leakage of the food in the container.

Further, since the lid 4 and the valve portion 16 can be integrally formed of the same material, the container can be easily manufactured, mass production is possible, and the manufacturing cost can be suppressed. Further, since the vertical length d2 of the first gas vent groove 7 is longer than the vertical length d1 of the gas vent hole 6, the valve portion 16 of the gas vent means opens the first gas vent groove 7. It has suitable flexibility.

Next, a second embodiment of the present invention will be described with reference to FIGS. 7 and 8. 7 and 8, the same parts as those shown in FIGS. 1 to 5 are designated by the same reference numerals, and their description will be omitted. As shown in FIGS. 7 and 8, in the second embodiment of the present invention, the valve portion 16 is provided with a second degassing groove 9 orthogonal to the first degassing groove 7 and penetrating the valve portion 16. It is provided. Also, this second
The vertical length d3 (not shown) of the degassing groove 9 is substantially equal to the vertical length d2 of the first degassing groove 7, and the width w2 of the second degassing groove 9 is equal to the first degassing groove 9. Width w1 of groove 7
Is almost equal to. The vertical length d3 and width w2 of these second gas vent grooves 9 may be different from the vertical length d2 and width w1 of the first gas vent groove 7, respectively. Further, the number of gas vent grooves provided in the valve portion may be three or more.

Next, the operation of the second embodiment of the present invention will be described. In the container of the second embodiment of the present invention configured as described above, the fermentation gas filled in the container 1 has the first degassing groove 7 and the second degassing groove similarly to the operation of the first embodiment. After flowing into the gaps 9 and passing through these gaps,
It is discharged from the gas vent hole 6 to the outside of the container. In the second embodiment of the present invention, the number of degassing grooves is 1 compared to the first embodiment.
Moreover, since the valve portion 16 is easily deformed, the fermentation gas can be discharged to the outside of the container more efficiently.

Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 9 is an enlarged cross-sectional view similar to FIG. 3 of the degassing means in the container of the third embodiment of the present invention. In FIG. 9, the same parts as those shown in FIG. 3 are designated by the same reference numerals, and their description will be omitted. As shown in FIG. 9, in the third embodiment of the present invention, the surface portion 5 of the lid 4 and the valve member 22 made of a different material are fixed to the surface portion 5 to form the degassing means 20. In this case, the surface portion 5 is made of glass or a brittle material including a part of a polymer material, and the valve member 2
For 2, a plastic material such as polypropylene that is relatively easily deformed depending on the internal pressure of the container even at room temperature is used.
The valve member 22 may be made of an elastic material other than the plastic material. Further, the gas vent groove 7 provided in the valve member 22 has the same structure as in the second embodiment.
You may provide one or more.

Next, the operation of the third embodiment of the present invention will be described. In the container of the third embodiment of the present invention thus configured, when the internal pressure of the container rises, the container is elastically deformed by the pressure of the gas flowing from the inside of the container to the outside of the container, similarly to the operation of the first embodiment. The first degassing groove 7
The width of expands. Fermentation gas filled in the container flows into the expanded first degassing groove 7 one after another, the fermentation gas flows from the first degassing groove 7 to the degassing hole 6, and finally the outside of the container. Is released to. When the internal pressure of the container drops to a predetermined pressure, the elastic deformation of the valve member 22 is released, and the width of the first gas vent groove 7 returns to the original narrow state. Thus, even when a brittle material or the like is used as the material of the lid 4, the valve member 22
By using only the material that is relatively easily deformed according to the internal pressure of the container at room temperature, sufficient degassing can be performed.

In the first to third embodiments of the present invention described above, the shape of the valve portion 16 and the valve member 22 is not limited to the cylindrical shape, but may be another shape such as a cube or a rectangular parallelepiped. . As a result, the degree of freedom in designing the degassing means is increased.

[0019]

As described above, according to the resin container of the present invention, as compared with the conventional resin container having the gas venting means, the container main body and the lid are sufficiently sealed to prevent liquid leakage. Meanwhile, the gas can be released to the outside of the container. Also,
Since the lid of the container and the degassing means can be easily integrally formed, the manufacturing cost of the container can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a container according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the container according to the first exemplary embodiment of the present invention, taken along the line AA in FIG.

FIG. 3 is an enlarged cross-sectional view of the degassing means in the container according to the first embodiment of the present invention, taken along line BB in FIG.

FIG. 4 is an enlarged plan view of the gas venting means taken along the line C-C in FIG.

5 is an enlarged bottom view of the gas venting means taken along the line D-D in FIG.

FIG. 6 is a view showing in principle the operating state of the gas venting means.

FIG. 7 is an enlarged plan view similar to FIG. 4 of the degassing means in the container of the second embodiment of the present invention.

FIG. 8 is an enlarged bottom view similar to FIG. 5 of the degassing means in the container of the second embodiment of the present invention.

FIG. 9 is an enlarged sectional view similar to FIG. 3 of the gas venting means in the container of the third embodiment of the present invention.

[Explanation of symbols] 1 container 2 container body 3,20 Degassing means 4 lid 5 faces 6 Gas vent holes 7 First gas vent groove 8 Container body mouth 9 Second gas vent groove 10 male screw 12 Lid 14 female screw 16 valve 18 central axis 22 Valve member D1 gas vent hole diameter D2 valve diameter d1 Vertical length of vent hole (cover surface thickness) d2 Vertical length of the first degassing groove d3 Vertical length of the second degassing groove w1 Width of first gas vent groove w2 Width of second gas vent groove

Claims (8)

[Claims] 1. A resin container provided with a container body and a resin lid fitted to a fitting portion of the container body, wherein the lid is provided on a surface portion of the container, and a gas inside the container is provided. To the outside of the container, the gas venting means is formed substantially integrally with the surface portion, which projects inward of the container from a region including the gas vent hole of the surface portion. When the internal pressure of the container is closed at a pressure lower than a predetermined pressure and the internal pressure of the container reaches a predetermined pressure or more, the convex part is elastically deformed to communicate the gas vent hole with the inside of the container. A resin container having a notch that forms a gas vent groove. 2. The container according to claim 1, wherein the degassing means is provided only at one location on the surface portion. 3. The resin container according to claim 1, wherein the convex portion has a cylindrical shape. 4. The resin container according to claim 1, wherein the convex portion has a polygonal prism shape. 5. The resin container according to claim 1, wherein one notch is provided in the convex portion. 6. The resin container according to claim 1, wherein two notches are provided so as to intersect the convex portion. 7. The resin container according to claim 1, wherein the width of the cut is smaller than the maximum dimension of the gas vent hole. 8. The resin container according to claim 1, wherein a thickness of the convex portion in a direction in which the cut extends is larger than a thickness of the surface portion.