JPH11100083A - Sealed container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a compressed gas from passing through a container so as to leak out of the container by providing a closure preventing means in a space between the inner surface of the container and the outer surface of an expandable inner bag which is provided in the container and charged with compressed gas. SOLUTION: The container 2 is formed by combining a synthetic resin with a metal in part, and an inner bag 4 can be formed from any elastic material; however a synthetic resin such as natural rubber or polyethylene is employed. And a protrusion 2a is formed on the inner surface of the container 2, which protrusion functions as a closure preventing means. Thus even if the bag 4 is pushed and expanded, the outer surface of the bag 4 is prevented from contacting the inner surface of the container 2, and a space in the container 2 can be prevented from being closed by the bag 4. And since the periphery of the bag 4 is surrounded by a raw liquid, a compressed gas filled in the bag 4 is prevented from leaking to the outside and held in the bag 4. As a result, the compressed gas can be prevented from passing through the container and leaking out of the container.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a sealed container.
More specifically, a sealed container comprising a container and a telescopic inner bag accommodated in the container, wherein the inner bag has a compressed gas introduced into the inner bag from only one direction, and only one direction. The present invention relates to a hermetically sealed container to which a valve for allowing the undiluted solution to be ejected from inside the container is connected.

[0002]

2. Description of the Related Art In a product in which a compressed gas is filled in a container made of synthetic resin, the compressed gas permeates the synthetic resin and the pressure of the product decreases with time. There is.

In a conventional double container, a stock solution is filled in an inner bag accommodated in a metal container, and a compressed gas is filled in a space between the metal container and the inner bag. I have. For this reason, when the inner bag is compressed with use, the undiluted solution is pushed out to the upper part of the inner bag, and the center of gravity of the double container moves upward, so that there is a problem that the double container easily falls down.

[0004] On the other hand, Japanese Patent Application Laid-Open No. Hei 9 (1996) discloses a structure in which a compressed gas is filled in an inner bag and a stock solution is filled in a metal container.
-202371 (see FIG. 10).

[0005] A sealed container 50 shown in FIG. 10 is provided with a stock solution 42 on the bottom side in a metal container 41, an inner bag 44 filled with compressed gas provided below a valve structure 43, and a valve. A dip tube 46 is provided on a side wall of the structure 43 via a check valve 45.

The sealed container shown in FIG.
However, the purpose is to prevent a so-called misuse in which compressed gas is injected without being injected from the released valve structure 43, and it can be said that this is a good example of achieving this purpose.

In the case of the container shown in FIG. 10, the state of contact between the upper inner surface of the metal container 41 and the side surface of the inner bag 44 is maintained, so that the inner bag 44 applies a uniform pressure to the stock solution 42. Has been granted.

However, if the sealed container shown in FIG. 10 is adopted as a container made of synthetic resin, the compressed gas in the inner bag can separate the inner bag and the container by maintaining the contact state between the side surface of the inner bag and the inner surface of the upper portion of the container. Then, the gas leaks out of the container, and as a result, the pressure of the compressed gas in the inner bag decreases with time.

An object of the present invention is to solve the above-mentioned problems of the conventional container, and to provide a sealed container in which compressed gas is prevented from permeating the container and leaking out of the container, and is hard to fall. That is.

[0010]

According to the present invention, there is provided a closed container which is made of a synthetic resin or a combination of a synthetic resin and a metal which is filled with an undiluted solution and has pressure resistance. And a retractable inner bag filled with, the inner bag is connected to a valve, and the valve introduces a compressed gas into the inner bag from only one direction; Only the spouting of the undiluted solution from inside the container is permitted, the inner bag is surrounded by the undiluted solution, and the container is provided with a blockage preventing means for preventing blockage of the space between the inner surface of the container and the outer surface of the inner bag. It is characterized by.

It is preferable that the container is transparent or translucent.

According to the sealed container according to the first aspect of the present invention, since the compressed gas is filled in the inner bag, the undiluted solution covers the compressed gas through the inner bag so as to surround the compressed gas. And the leakage of the compressed gas through the container and out of the container is reliably prevented. In addition, since it is provided with a blockage preventing means for preventing blockage of the space between the inner surface of the container and the outer surface of the inner bag, even when the inner bag is expanded, the inner surface of the container and the outer surface of the inner bag can be removed. The undiluted solution can pass through the space between them, and the inner surface of the container and the outer surface of the inner bag can be prevented from making surface contact with each other, so that the compressed gas in the inner bag can be prevented from leaking out of the container. Further, the undiluted solution can move to the bottom of the container unlike a product in which the undiluted solution is filled in a conventional inner bag, and the center of gravity of the sealed container does not move above the sealed container and is stable.

According to the sealed container according to the second aspect of the present invention, since the container is transparent, the amount of the undiluted solution in the container can be visually recognized.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sealed container according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a sectional explanatory view showing an example of a sealed container according to one embodiment of the present invention, FIG. 2 is a sectional explanatory view showing an example of a sealed container according to another embodiment of the present invention,
3A is a cross-sectional explanatory view showing a manufacturing process of the sealed container of FIG. 1, FIG. 3B is a cross-sectional view taken along the line AA of FIG. 3A, and FIG. FIG. 5 is a cross-sectional explanatory view showing a manufacturing process of the sealed container of FIG. 1, and FIG.
7 is a cross-sectional explanatory view showing the manufacturing process of the sealed container of FIG. 1, FIG. 7 is a cross-sectional explanatory view showing the manufacturing process of the sealed container of FIG. 1, and FIG. 8 is a cross-sectional explanatory view showing an example of the sealed container according to one embodiment of the present invention. is there.

Referring to FIG. 1, a sealed container 1 according to one embodiment of the present invention is a bottomed cylindrical container 2 having an opening 20 and is attached to the container 2 so as to close the opening 20. The valve structure 3 includes a valve structure 3 in which a passage 30 is formed, and an inner bag 4 having an open end side attached to a lower end portion of the valve structure 3 by pressure-tight sealing. The valve structure 3 enables the introduction of the compressed gas into the inner bag 4 from only one direction and the ejection of the undiluted solution from the container 2 only from one direction.

As the compressed gas, nitrogen gas, carbon dioxide gas,
A mixed gas composed of at least two kinds selected from compressed air, nitrous oxide and the above-mentioned compressed gas is preferably employed.

The compressed gas is pressurized so that the entire amount of the stock solution in the container 2 can be injected (preferably, the initial pressure is 10 kg / cm 2).
² or less).

The inner bag 4 is not particularly limited as long as it is a material having elasticity. Natural rubber, styrene butadiene rubber (SBR), butadiene rubber (BA), isoprene rubber (IR), chloroprene rubber (CR), Synthetic rubber such as acrylonitrile-butadiene rubber (NBR), butyl rubber (IIR), ethylene-propylene rubber (EPDM), or polyethylene, polypropylene,
Synthetic resins such as nylon are preferably used.

The container 2 can be composed of a synthetic resin or a combination of a synthetic resin and a metal in order to increase the strength (pressure resistance, impact resistance, etc.) of the container. This is preferable because the merit that the remaining amount of the stock solution can be visually recognized is obtained. The cross-sectional shape of the inner surface of the container 2 is non-circular (see FIG. 3B). In the case of the present embodiment, a projection 2a is formed on the inner surface of the container 2, and the projection 2a functions as a blocking prevention means. For this reason, even when the inner bag 4 is expanded, the outer surface of the inner bag 4 and the inner surface of the container 2 can be prevented from being in contact with each other, and the inner space of the container 2 is not closed by the inner bag 4. Therefore, it is preferable because the whole stock solution can be jetted. Further, the outer shape of the container 2 is not particularly limited. For example, a cylindrical shape, a bottom elliptic tube, a truncated cone, or a gourd shape may be employed in addition to a bottle shape.

In the embodiment shown in FIG. 1, the valve structure 3 includes a first valve means 31 and a second valve means 32 functioning as a check valve.

In this embodiment, the second valve means 32 is provided in the first valve means 31 and provided in the first cylinder 33 and the first cylinder 33 which are connected to the first valve means 31. And a second cylinder 34 connected to the first cylinder 33.

A first partition 35 is provided in the first cylinder 33.
Has been fixed. A hole 35a is formed substantially at the center of the first partition 35. The first cylinder 33 communicates with the internal space of the container 2 via the hole 35a and a passage 35b communicating with the hole 35a. Further, a slit 35c is formed in the first partition 35, and the first cylinder 33 is connected to the second cylinder 34 through the slit 35c.
Is communicated with the passage 34a. Further, the first cylinder 3
Inside 3, a first sphere 36 capable of closing the hole 35a is movably provided.

In the second cylinder 34, a second partition 37 is provided.
Has been fixed. A hole 37a is formed substantially at the center of the second partition 37. The first cylinder 33 and the second cylinder 34 communicate with each other via the hole 37a. Also the second
The cylinder 34 has a second sphere 38 capable of closing the hole 37a.
Are provided movably. A hole H communicating with the inside of the inner bag 4 is formed at the bottom of the second cylinder 34, and the hole H is not closed by the second sphere 38.

The embodiment shown in FIG. 2 is the same as the embodiment shown in FIG. 1 except for the structure inside the second cylinder 34.

In this embodiment, the second cylinder 3
A passage 34 a communicating with the first cylinder 33 and having a cross-sectional shape bent in an L-shape is formed in 4. The passage 34 a terminates on the side of the second cylinder 34 and communicates with the inside of the inner bag 4. On the side of the second cylinder 34, a swing plate 39 that can close the end of the passage 34a is provided rotatably.

Next, a method for manufacturing the sealed container of the present invention will be described with reference to FIGS.

(I) First, a stock solution is filled through the opening 20 (see FIG. 3) of the container 2 (see FIG. 4).

(II) Next, the valve structure 3 is mounted on the container 2 with the inner bag 4 attached (see FIG. 5).

(III) The valve structure 3 is crimped into the opening 20 of the container 2 (see FIG. 6). When the entire valve structure 3 is made of a non-metal such as synthetic resin or rubber, it may be fixed to the container 2 by welding (see FIG. 8).

(IV) The compressed gas that functions as a propellant is filled into the inner bag 4 of the container 2 from the stem S of the valve structure 3 (see FIG. 7). In this step, the compressed gas injected from the stem S passes through the first valve means 31 to the first cylinder 3.
3, the slit 35c of the first partition 35 and the second
Then, it reaches the second cylinder 34 through the hole 37a of the partition 37, and is filled into the inner bag 4 through the hole H (see FIGS. 1 and 2). At this time, the hole 35a of the first partition 35
It is closed by the first sphere 36 (see FIGS. 1 and 2). Therefore, the compressed gas does not fill the space between the container 2 and the inner bag 4.

When the filling of the compressed gas (propellant) into the inner bag 4 is completed, the second sphere 38 (see FIG.
Is moved upward by the compressed gas, and the second partition 3
7 (in the case of the embodiment shown in FIG. 2), the swing plate 39 is pressed by the compressed gas to close the end of the passage 34a. Also, since the periphery of the inner bag 4 is surrounded by the undiluted solution, the compressed gas filled in the inner bag 4 can be held in the inner bag 4 without leaking to the outside.

The stock solution that can be filled in the container 2 of the sealed container of the present invention is not particularly limited.
Home products such as wound medicines and other quasi-drugs such as mouth fresheners, repellents, antiperspirants, anti-perspirants, hair lotions, cosmetics such as lotions, emulsions, colognes, lotions, hair tonics, deodorants, and glass cleaners Stock solutions for various uses such as supplies can be filled.

[0034]

Next, the sealed container of the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

A container 2 (total volume 100 cm ³ ) made of polyethylene terephthalate (PET) is filled with a lotion (60 g), and is made of synthetic resin and rubber provided with an elastic inner bag 4 made of styrene butadiene rubber (SBR) After the valve structure 3 and the container 2 are welded by high frequency,
Nitrogen gas is filled into inner bag 4 from stem S, and 6.8 kg
/ Cm ² (see FIG. 8). When this product was sprayed, it became a fine mist and a comfortable use was obtained.

In the product of Comparative Example 1, the inner bag 4 is filled with lotion and the container 2 is filled with nitrogen gas.

The product of Comparative Example 2 was prepared by filling a metal container with a lotion, which was a stock solution, and then filling the container with nitrogen gas, and did not have an inner bag.

The test samples of Example, Comparative Example 1 and Comparative Example 2 were each stored at 25 ° C. before the test (0 mon).
th) 1 month, 2 month, 3 month
The internal pressure (product pressure) of the container after the passage of s and 12 months was measured, and is summarized in FIG.

[0039]

[Table 1]

[0040]

According to the present invention, it is possible to provide a sealed container in which a compressed gas is prevented from permeating the container and leaking out of the container, and is hard to fall down.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing an example of a sealed container according to an embodiment of the present invention.

FIG. 2 is an explanatory sectional view showing an example of a sealed container according to another embodiment of the present invention.

FIG. 3 is an explanatory sectional view showing a manufacturing process of the sealed container of FIG. 1;

FIG. 4 is an explanatory sectional view showing a manufacturing process of the sealed container of FIG. 1;

FIG. 5 is an explanatory sectional view showing a manufacturing process of the sealed container of FIG. 1;

FIG. 6 is an explanatory sectional view showing a manufacturing process of the sealed container of FIG. 1;

FIG. 7 is an explanatory sectional view showing a manufacturing process of the sealed container of FIG. 1;

FIG. 8 is an explanatory sectional view showing an example of a sealed container according to one embodiment of the present invention.

FIG. 9 is a graph showing changes over time in internal pressures of the sealed container according to the example of the present invention and the containers according to Comparative Examples 1 and 2.

FIG. 10 is an explanatory sectional view showing an example of a conventional sealed container.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sealed container 2 Container 2a Projection 3 Valve structure 4 Inner bag

Claims (2)

[Claims] 1. A container made of a synthetic resin or a combination of a synthetic resin and a metal which is filled with a stock solution and has pressure resistance, an elastic inner bag which is housed in the container and filled with a compressed gas, Wherein the inner bag is connected to a valve, and the valve permits the introduction of compressed gas into the inner bag from only one direction and the ejection of the undiluted solution from the container only in one direction. A hermetically sealed container, wherein the inner bag is surrounded by a stock solution, and provided with a blocking preventing means for preventing a space between an inner surface of the container and an outer surface of the inner bag from being blocked. 2. The sealed container according to claim 1, wherein the container is transparent or translucent.