JPH078242U - Double container - Google Patents

Abstract

(57) [Summary] [Purpose] With respect to a double container, an object thereof is to provide a double container capable of preventing alteration of the contents and easily squeezing out the contents to the end. [Structure] An inner container 1 having no self-restoring property for containing contents and an outer container 2 having self-restoring property are provided, and a sealed space 3 is formed between the inner container 1 and the outer container 2,
A communication hole 4 for communicating the closed space 3 with the outside is formed in the outer container 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a container for storing a highly viscous material or a viscous material, and more particularly to a double container capable of preventing alteration of the contents and easily squeezing the contents to the end.

[0002]

[Prior art]

 BACKGROUND ART Conventionally, synthetic resin bottles, tubes, metal tubes and the like have been widely used as containers for foods such as highly viscous materials such as mayonnaise, miso and kneaded wasabi. In addition, synthetic resin bottles and tubes are often used as containers for high-viscosity adhesives, chemical products such as caulking agents, ointment-like drugs, toothpastes, and cosmetic products such as cosmetic creams.

These containers are, for example, metal tubes, which do not have the property (self-restoring property) of naturally returning to their original shape when the contents are squeezed out by hand and then released. Classified as and.

[0004]

[Problems to be solved by the device]

 Containers without self-restoration have the advantage that the atmosphere is not sucked into the container after the contents are squeezed out, which prevents the contents from being altered by oxygen and water in the atmosphere. There is a disadvantage that the container becomes thinner by squeezing out the squeezed, and it becomes difficult to squeeze out.

The self-restoring container has the advantage that it is easy to squeeze out to the end because the shape of the container returns to its original shape after squeezing out, while the atmosphere is sucked into the container after squeezing out the contents. However, there is a problem that the contents are altered by oxygen and moisture in the air sucked into the container, and the flavor is impaired, the contents are cured, and the contents are dried.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a double container capable of preventing alteration of contents and easily squeezing out contents to the end. And

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the double container of the present invention comprises an inner container having no self-restoring property for storing contents and an outer container having self-restoring property. A hermetically sealed space is formed therebetween, and a communication hole for communicating the hermetically sealed space with the outside is formed in the outer container.

[0008]

[Action]

 When the outer container is squeezed by hand while closing the communication hole with, for example, a finger or a check valve, the inner pressure of the sealed space rises and the inner container is squeezed, and the contents are squeezed out from the mouth of the double container. After that, when the communication hole is opened and the force for squeezing the outer container is released, the outer container returns to its original shape by the self-restoring property. When the outer container returns to its original shape, the atmosphere flows into the enclosed space through the communication hole opened, so the internal pressure of the enclosed space is maintained at the same level as the atmosphere. As a result, there is no pressure difference between the inside and the outside of the inner container, and the inner container, which is not self-restoring, retains its shape when squeezed.

After the outer container is restored to its original shape, if the outer container is squeezed while pressing the communication hole again, the internal pressure of the closed space increases again, and this pressure squeezes the inner container 1 to discharge the contents from the container. To be done. Then, such squeezing and restoration of the outer container are repeated in the same manner until the contents are exhausted.

In the present invention, the communication hole may be provided with a check valve for preventing the outflow of air from the closed space to the outside. In this case, when automatically squeezing out the contents, the communication hole can be closed, and when the outer container is restored, the closed space can be communicated with the atmosphere, and the communication hole can be pressed or opened with fingers. There is no need.

[0011]

【Example】

 An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a sectional view of a double container according to an embodiment of the present invention. The double container includes a tubular inner container 1 for storing contents and a self-recovering container. And a tubular outer container 2 having properties.

A closed space 3 is formed between the inner container 1 and the outer container 2, and a communication hole 4 is formed in the outer container 2 for communicating the closed space 3 with the outside.

Further, the communication hole 4 is provided with a check valve 5 for preventing the outflow of air from the closed space 3 to the outside, if necessary.

The check valve 5 is composed of a single reed-shaped valve element and, as shown in FIG. 2, covers the communication hole 4 from the inside before the inner container 1 and the outer container 2 are integrated. Then, the outer container 2 is supported by, for example, thermocompression bonding.

One ends 1a and 2a of the inner container 1 and the outer container 2 are reduced in diameter, respectively, and one end 1a of the inner container 1 is fitted into one end 2a of the outer container 2 as shown in FIG. Then, the mouth portion 6 is formed by crimping. Further, the other ends 1b and 2b of the inner container 1 and the outer container 2 are overlapped and sealed by, for example, thermocompression bonding.

Although not shown, a screw for screwing a lid is formed on the mouth portion 6 if necessary.

After filling the inner container 1 with the contents and squeezing the outer container 2 by, for example, holding it in the hand, the check valve 5 is closed, and the pressure squeezing the outer container 2 causes the air in the closed space 3 to squeeze out. It acts as a medium on the inner container 1, and the inner container 1 is squeezed and the contents are squeezed out from the mouth portion 6 to the outside.

After that, when the force of squeezing the outer container 2 is released, the outer container 2 returns to its original shape by the self-restoring property. At this time, the check valve 5 is opened, and the internal pressure of the closed space 3 becomes equal to the atmospheric pressure that pushes the contents inward from the mouth 6 of the inner container 1, so that the inside without self-restoration is present. The container 1 is retained in its original shape after being squeezed, and the contents are not pushed into the inner container 1. Therefore, there is no possibility that the atmosphere will be sucked into the inner container 1 and the contents will be deteriorated by oxygen and moisture in the sucked air.

After the force for squeezing the outer container 2 is released and the outer container 2 returns to its original shape, when the outer container 2 is held by hand and squeezed, the check is performed in the same manner as when the outer container 2 was squeezed before. The valve 5 is closed, and the pressure for squeezing the outer container 2 acts on the inner container 1 using the air in the closed space 3 as a medium, and the contents are squeezed out from the mouth 6 to the outside.

In this way, the squeezing of the contents is repeated until the contents are completely lost by squeezing the outer container 2 that has been restored and is easy to squeeze. Therefore, the contents can be easily squeezed to the end. You can

In the above embodiment, the check valve 5 is supported by the outer container 2 so as to cover the communication hole 4 from the inside before the check valve 5 integrates the inner container 1 and the outer container 2. However, when the inner container 1 and the outer container 2 are integrated, the check valve 5 is overlapped with the other end portions 1b and 2b of the inner container 1 and the outer container 2, and the inner container 1 and the outer container 2 are joined by thermocompression bonding. The outer container 2 may be supported.

In a double container according to another embodiment of the present invention, as shown in FIG. 6, a check valve 5 has a valve element 51, an outer lid 52 for pressing the valve element 51 from the outside of the outer container 2, and a valve element. An inner lid 53 that holds 51 from the inside of the outer container 2 is provided.

As shown in FIG. 7, the valve element 51 includes an outer peripheral portion 51 a that is overlapped with the peripheral portion of the communication hole 4 of the outer container 2 and a circular valve that is connected to the inner edge of the outer peripheral portion 51 a via a connecting portion 51 b. It is composed of a single elastic film made of, for example, rubber or synthetic resin, which is composed of the child main body 51c.

As shown in FIGS. 6, 8 and 9, the outer lid 52 includes a donut plate-shaped lid body 52b having a central hole 52a having a diameter smaller than that of the valve body 51c, and a back surface of the lid body 52b. The projection 51c has a coupling projection 52c which is inserted into a C-shaped groove 51d formed between the outer peripheral portion 51a of the valve element 51 shown in FIG. 6 and the valve element body 51c. As shown in FIG. 10, the lid 53 is formed in a donut plate shape into which the connecting projection 52c of the outer lid 52 is fitted.

Before the inner container 1 and the outer container 2 are integrated with each other, the check valve 5 has an outer peripheral portion of the valve element 51 outside the peripheral portion of the communication hole 4 of the outer container 2 as shown in FIG. The inner lid 53 is overlapped on the inner side of the valve 51a, and the connecting projection 52c of the outer lid 52 is fitted into the inner lid 53 from the outer side of the valve element 51 through the groove 51d of the valve element 51. Be assembled into.

Other configurations, operations and effects of this embodiment are the same as those of the previous example, and detailed description thereof will be omitted to avoid duplication.

Further, in each of the above-described embodiments, the inner container 1 and the outer container 2 are formed in a relatively long tube shape, but the shape of the inner container 1 and the outer container 2 is not limited to this. However, the outer container 2 may be formed in any shape, for example, in the shape of a short tube as shown in FIG. 11, or in the shape of a downwardly swollen bottle as shown in FIG. 12, or as shown in FIG. 13 or FIG. It can be formed into a simple cylindrical shape.

Further, the check valve 5 may be provided on the peripheral surface of the outer container 2 as shown in FIGS. 1 to 5, 11 or 12, but for example as shown in FIG. 13 or 14. Alternatively, it may be provided on the bottom surface of the outer container 2.

In addition, in each of the above embodiments, the check valve 5 is provided in the communication hole 4, but the check valve 5 can be omitted, for example, as shown in FIGS. 15 and 16. Is. In this case, when the contents are squeezed out, as shown in FIG. 15, the outer container 2 is squeezed while the communication hole 4 is closed with fingers or the like, and when the outer container 2 is returned to its original shape, the communication hole is formed as shown in FIG. If 4 is opened, inhalation of air into the inner container 1 and deterioration of the contents due to this can be prevented, and the contents can be easily squeezed out to the end, as in the above-mentioned embodiments.

[0031]

[Effect of device]

 As described above, according to the present invention, the inner container having no self-restoring property and the outer container having self-restoring property are used, and the closed space formed between the inner container and the outer container is formed in the outer container. Since it is possible to communicate with the atmosphere through the communication hole, it is possible to prevent the inner container from inhaling the atmosphere after squeezing, and the oxygen and moisture in the atmosphere inhaled into the inner container may change the contents. It is possible to prevent squeezing and deterioration, and to squeeze the contents by squeezing the outer container that has been restored and easy to squeeze, so that the contents can be squeezed out easily to the end.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of the present invention during squeezing.

FIG. 2 is an exploded perspective view showing how to install the check valve of the present invention.

FIG. 3 is a cross-sectional view showing how to join an inner container, an outer container and a check valve according to the present invention.

FIG. 4 is a perspective view of the present invention.

FIG. 5 is a cross-sectional view of the present invention when the outer container is restored.

FIG. 6 is a sectional view of an essential part of the present invention.

FIG. 7 is a plan view of the check valve of the present invention.

FIG. 8 is a plan view of the outer lid of the check valve of the present invention.

FIG. 9 is a side view of the outer lid of the check valve of the present invention.

FIG. 10 is a plan view of the inner lid of the check valve of the present invention.

FIG. 11 is a perspective view of the present invention.

FIG. 12 is a perspective view of the present invention.

FIG. 13 is a perspective view of the present invention.

FIG. 14 is a perspective view of the present invention.

FIG. 15 is a sectional view of the present invention when squeezed.

FIG. 16 is a cross-sectional view of the present invention when the outer container is restored.

[Explanation of sign]

 1 Inner container 2 Outer container 3 Closed space 4 Communication hole 5 Check valve

Claims (2)

[Scope of utility model registration request] 1. An inner container having no self-restoring property for storing contents and an outer container having self-restoring property is provided, and a closed space is formed between the inner container and the outer container, and the outer container is provided. A double container characterized in that a communication hole is formed to connect the closed space and the outside. 2. The double container according to claim 1, wherein the communication hole is provided with a check valve for preventing the outflow of air from the closed space to the outside.