JP2011157119A - Double structure container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new double structure container which can surely squeeze out contents. <P>SOLUTION: The double structure container 100, having an inner container 20, which is deformed under pressure and is not restored, when the pressure is removed, to the original shape, in an outer container 10, which is deformed under pressure and is restored to the original shape when the pressure is removed, The double structure container is provided with a guide pipe 25 communicating with a mouth part 22 of the inner container to distribute contents M filled in the inner container 20 in the inner container 20. Thereby the inner container 20 itself is crushed to close the mouth part of the inner container 20, surely squeezing out all the contents M. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a double-structured container having an inner container filled with fluid contents such as cream, paste, oily substance, and liquid substance inside an outer container that can be deformed and restored.

In general, fluid substances such as mayonnaise, kneaded wasabi, toothpaste, and cosmetic cream are often sold in plastic tube containers.
These tube-shaped containers have a structure in which the contents are pushed out from the mouth by crushing the side and the like by hand, but when the hand is released after it has been put out, air is released from the mouth of the container by its restoring force. Get in. As a result, the surface in contact with the contents and air (oxygen) gradually spreads, and the contents may oxidize, resulting in a decrease in freshness and quality.

In order to avoid such a phenomenon, for example, chemicals and the like often use a metal non-restorable tube container to prevent the intake of air due to the restoration of the container shape, thereby preventing the content from contacting the air. However, the non-restorable tube container has a disadvantage that the entire container is gradually crushed and becomes smaller, and hence the subsequent handling and usability of the container are poor.
Therefore, for example, Patent Document 1 below proposes a double container in which an inner container filled with contents is accommodated in the outer container and a vent hole and a check valve are provided in the outer container. Further, in Patent Document 2 below, the outer side has a restoring force, the inner side is made of a flexible material having a small restoring force, and the inner and outer double tubes are formed, and the outer tube is provided with an air hole and a valve. Heavy tube containers have been proposed.

  And in the double container proposed by these patent documents 1 and 2, after the inner container was pressed and the contents were squeezed out by applying pressure to the outer container, the inner container became small Only the outer container remains in a state to take in air from its valve and restore it to prevent deterioration of handling and usability of the container.

Japanese Utility Model Publication No. 57-44063 Japanese Utility Model Publication No. 63-169455

However, in the known double container as described above, the inner container itself is crushed in the process of gradually decreasing the inner container as the contents are discharged, and the mouth is closed. Part of the contents may remain without being squeezed out.
In addition, the double container not only increases the manufacturing cost, but also has a problem that it is wasteful because the entire container is discarded after all the contents in the inner container have been dispensed.

Accordingly, the present invention has been devised to solve these problems, and its main purpose is to provide a novel double-structured container that can reliably squeeze out the contents.
Another object of the present invention is to provide a new double-structured container which can be reused by reusing the expensive double container.
Furthermore, another object of the present invention is to provide a novel double-structured container that can be manufactured at a lower cost.

In order to solve the above problems, the first invention
It is a double-structured container that has an inner container that deforms when pressure is applied and that returns to its original shape when pressure is lost, and that deforms when pressure is applied and does not restore its original shape when pressure is lost. A double-structured container comprising a guide pipe in communication with the mouth of the inner container in order to distribute the contents filled in the inner container.
In the case of a double-structure container having such a configuration, the inner container itself is not crushed by the guide pipe communicating with the mouth part of the inner container, and the mouth part of the inner container is not blocked. Everything can be squeezed reliably.

In addition, the second invention,
In the first invention, the guide pipe is a double-structure container characterized in that a plurality of inflow holes are formed along the longitudinal direction of the guide pipe.
In such a structure, even if the inner container is in close contact with the guide pipe and a part of the inflow hole is blocked, the contents flow into the guide pipe from the other inflow holes, so that they are clogged. All of the contents can be extracted without fail.

In addition, the third invention,
In the first or second aspect of the invention, the guide pipe is a double-structured container characterized in that the lower part has a T-shape.
With such a structure, since the inner container is maintained in a flat shape even in the process in which the inner container is deflated, the contents can be squeezed out more effectively.

In addition, the fourth invention is
1st thru | or 3rd invention WHEREIN: The said inner side container has the said opening part detachable to the opening part of the said outer side container, and the outer diameter of the state filled with the content is the opening part of the said outer side container This is a double-structured container characterized by being smaller than the diameter.
According to such a structure, it is possible to take out the inner container which has been squeezed out of all the contents and take it out of the outer container and replace it with a new inner container. As a result, the outer container can be reused, so that cost reduction and waste can be eliminated.

In addition, the fifth invention,
In any one of the first to fourth inventions, the outer container closes when pressure is applied to the bag-shaped container body and opens to take in external air when the pressure disappears and the original shape is restored. A double-structured container characterized by having a valve.
According to such a structure, when the pressure is applied, it easily deforms, and when the pressure disappears, the original shape is reliably restored, so that the contents can be squeezed out reliably and the handling and usability of the container is deteriorated. Can be avoided.

In addition, the sixth invention,
5th invention WHEREIN: The said air valve consists of the air hole opened in the said external container, and the film-like valve body which rock | fluctuates so that this air hole may be opened and closed, The container of the double structure characterized by the above-mentioned It is.
According to such a structure, since the air valve can be manufactured more simply and inexpensively, the manufacturing cost of the entire container can be reduced.

In addition, the seventh invention,
In any one of the first to sixth aspects of the invention, a double-flow check valve is provided, which is provided at the mouth portion of the inner container and opens when the discharge pressure of the contents is applied, and closes when the discharge pressure disappears. It is a container of structure.
According to such a structure, inflow of air from the mouth portion to the inner container can be reliably prevented.

Further, the eighth invention is
In any one of the first to seventh inventions, the outer container is a double-structured container made of a transparent or translucent material.
According to such a structure, the remaining amount of contents in the inner container can be easily grasped visually from the outside.

  According to the present invention, since the inner container itself is not crushed by the guide pipe communicating with the mouth portion of the inner container and the mouth portion of the inner container is not blocked, all of the contents can be reliably squeezed out. Further, since the inner container can be taken out from the outer container and only the inner container can be replaced with a new one, the outer container can be reused, and cost reduction and waste can be eliminated.

(A) is a front view which shows one Embodiment of the container 100 of the double structure which concerns on this invention, (b) is the side view. (A) is the elements on larger scale which show A section in Drawing 1 (a), (b) and (c) are the elements on larger scale showing A section in Drawing 1 (b). It is a fragmentary sectional view which shows the state which isolate | separated the inner side container from the outer side container. (A) is the elements on larger scale which show the A section in FIG. 3, (b) is a conceptual diagram which shows the state which the content discharges from the state of (a). It is the sectional view on the AA line in Drawing 4 (a). (A) is a side view showing a state in which the contents are filled in the inner container, (b) is a side view showing a state in which the contents of the inner container are discharged by pressurizing the outer container from the state of (a). c) is a side view showing a state in which the pressure is lost from the state of (b) and only the outer container is restored to its original shape, and (d) is the content of the inner container by further pressurizing the outer container from the state of (c). It is a side view which shows the state which discharged the thing. (A) is a front view which shows the state which discharged the content in an inner side container substantially completely, (b) is a side view of (a). 2 shows another embodiment of a double-structured container according to the present invention. It is explanatory drawing which shows other embodiment of the container of the double structure which concerns on this invention, and shows the structure of the cover part 23 part. (A) is a perspective view which shows other embodiment of the air valve 14, (b) is the elements on larger scale which show the A section in Fig.10 (a). It is an expanded sectional view which shows other embodiment of the air valve 14, (a) is the state which the air hole 15 closed, (b) is a figure which shows the state which the air hole 15 opened.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows one embodiment of a double-structured container (hereinafter referred to as “double container”) 100 according to the present invention, where (a) is a front view thereof and (b) is a side view thereof. is there.
As shown in the figure, the double container 100 has a structure in which a bag-shaped inner container 20 filled with a fluid content is accommodated inside a tube-shaped outer container 10.
As shown in FIG. 3, the outer container 10 has a structure in which a container body 11 having a closed lower end is provided with an annular mouth portion 12, and a spiral thread 13 is formed on the peripheral surface of the mouth portion 12. Is formed.

  The container body 11 is deformed when pressure is applied from the outside, and has a resilience that restores the original shape when the pressure is lost. A known synthetic resin such as polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, Polystyrene, styrene / acrylonitrile copolymer, styrene / butadiene / acrylonitrile copolymer, high density polyethylene, medium density polyethylene, low density polyethylene, ethylene / vinyl acetate copolymer, polypropylene, polyacetal, polymethyl methacrylate, modified acrylic, acetic acid It is made of cellulose, polycarbonate, polyethylene terephthalate, polyamide, polyurethane or natural rubber.

In addition, at least one air valve (check valve) 14 is provided in a part of the container body 11.
2A to 2C, the air valve 14 has a small air hole 15 perforated in the container main body 11 and one end thereof so as to close the air hole 15 from the inside of the container main body 11. The upper end) is composed of a strip-shaped flexible valve body 16 fixed to the inner wall of the container body 11.

When the pressure is applied to the container body 11 as shown in FIG. 2 (b), the air valve 14 closes the open end of the valve body 16 in close contact with the air hole 15, and FIG. ), When the pressure disappears and the original shape is restored, the open end of the valve body 16 is separated from the air hole 15 and opened to take outside air into the container body 11.
On the other hand, as shown in FIG. 3, the inner container 20 includes a bag-shaped container body 21 that is filled with a fluid content M and that can be expanded and contracted, a pipe-shaped mouth portion 22 to which the container body 21 is attached, It is mainly composed of a flange-like lid portion 23 that penetrates and fixes the portion 22.

The lid portion 23 has a thread groove 24 threaded on the inner peripheral surface thereof, and the inner container 20 is attached to and detached from the outer container 10 by screwing with the thread 13 of the mouth portion 12 of the outer container 10. The mouth portion 12 of the outer container 10 is sealed while being freely attached.
The container body 21 is particularly limited as long as it is a material that is deformed when pressure is applied and does not recover to its original shape even when the pressure is lost, and that can be stably stored without reacting with the contents M. Instead, it can be made of the same synthetic resin or natural resin as the material constituting the outer container 10. Furthermore, in this case, in order to reduce the resistance at the time of pressurization, it is desirable to make it as thin as possible.

Further, as shown in FIG. 3, the container body 21 has an outer diameter L1 in a state in which the contents M are fully filled, which is slightly smaller than the diameter L2 of the mouth portion 12 of the outer container 10 (L1 <L2 ), Even the inner container 20 filled with the contents M can be easily stored in and removed from the outer container 10.
Further, a guide pipe 25 for distributing (discharging) the contents M filled therein is provided in the container main body 21.

The guide pipe 25 is a pipe formed in a T shape, and is fixed to the mouth portion 22 side so that the vertical portion 25a is inserted into the mouth portion 22, and the horizontal portion 25b at the lower end thereof is a container body. 21 is located so as to face the inner bottom.
Further, a plurality of inflow holes 26 are formed in the guide pipe 25 along its longitudinal direction so that the contents M can flow into the guide pipe 25 from all or any of these inflow holes 26, 26. It has become.

As shown in FIGS. 4 and 5, a check valve 27 (a check valve) is provided in the mouth portion 22 of the outer container 10.
As shown in FIG. 4A, the backflow prevention valve 27 includes a ball valve B seated on the upper opening 25a of the guide pipe 25 as a valve seat, and a plurality of protrusions (to prevent the ball valve B from falling off). (Stoppers) 28, 28, 28, 28 (four in this embodiment) and a coil spring 29 for pressing the ball valve B.

4A and 5, when the discharge pressure of the contents M is applied, the ball valve B is lifted and the upper opening 25a is opened, and the contents in the guide pipe 25 are changed to the ball valve B. The liquid passes through a gap S formed between the protrusions 28, 28, 28, and 28 and is discharged from the tip of the mouth portion 22.
On the other hand, when the discharge pressure of the contents M disappears, the ball valve B is seated on the upper opening 25a and closed by the coil spring 29, so that air flows into the guide pipe 25 (inside the container body 21) (reverse flow). Is to prevent. Further, the contents M are prevented from leaking when the container falls over without pressure.

Next, the operation and effect of the double container 100 of the present invention having such a configuration will be described.
First, as shown in FIGS. 6A and 6B, when the inner container 20 is fully filled with the contents M, the outer container 10 is pressed with a finger or the like so that the inner container 20 is crushed by the pressure. The inner contents M are discharged from the mouth portion 22 of the outer container 10.
When the finger is released from the state shown in FIG. 5B, the outer container 10 tries to return to its original shape by the restoring force of the outer container 10 itself as shown in FIG. At this time, since the inside of the outer container 10 is in a negative pressure state, the air valve 14 is opened, and the outside air flows into the outer container 10 from the air hole 15 and is maintained at a uniform pressure. There is no. Further, since the inner container 20 is blocked by the backflow prevention valve 27, air does not flow into the inner container 20 from the mouth portion 22.

Next, when the outer container 10 is pressed again with a finger or the like from the state shown in FIG. 5C, the internal pressure in the outer container 10 rises and the air valve 14 is closed, and the inner pressure is increased by the inner pressure. Is compressed and the content M is further discharged from the mouth portion 22.
Then, by repeating such an operation, as shown in FIG. 7, the inner container 20 is finally compressed so as to be in close contact with the guide pipe 25, and all the contents M are discharged through the guide pipe 25. It will be.

In the drawing, the structure of the guide pipe 25 is expressed thicker than the actual one for easy understanding, but it is difficult to take out the last contents M remaining in the guide pipe 25. Therefore, in order to reduce the residue as much as possible, it is desirable that the guide pipe 25 be as thin as possible while exhibiting an appropriate strength.
As described above, in the double container 100 of the present invention, the outer container 10 always maintains the original shape, and only the inner container 20 becomes smaller in accordance with the remaining amount of the contents M, so that the handling and usability of the container are deteriorated. It is possible to prevent deterioration of the contents M and quality change due to contact with air (oxygen).

Further, since the guide pipe 25 communicating with the mouth portion 22 is provided in the inner container 20, the inner container 20 itself is not crushed to block the mouth portion 22 of the inner container 20, and all of the contents M are removed. Can be squeezed reliably.
That is, if there is no such guide pipe 25, the mouth 22 is blocked by a part of the container body 21 depending on the deformed (reduced) state of the container body 21 of the inner container 20, and the remaining contents. Although M may not be discharged, such a problem can be reliably avoided by providing the guide pipe 25 in the inner container 20 as in the present invention.

Further, since the lower end portion of the guide pipe 25 has a T shape, the inner container 20 is maintained in a flat shape even in the process in which the inner container 20 is deflated, so that the contents M are squeezed out more effectively. be able to.
Further, in the present invention, a plurality of inflow holes 26, 26... Are formed along the longitudinal direction of the guide pipe 25, so that the container body 21 of the inner container 20 is in close contact with the guide pipe 25 and its lower opening. Alternatively, even if a part of the inflow holes 26, 26... Is blocked, the content M flows into the guide pipe 25 from the other inflow holes 26, so that all of the content M is surely prevented from being clogged. Can be discharged.

Further, in the double container 100 of the present invention, the inner container 20 is detachable from the mouth portion 12 of the outer container 10 and all the contents M are squeezed out to take out the empty inner container 20 from the outer container 10. And can be replaced with a new inner container 20.
As a result, the outer container 10 can be reused any number of times, so that cost reduction and waste of resources can be eliminated.

In this case, since the outer diameter L2 of the inner container 20 filled with the contents M is smaller than the diameter L1 of the mouth portion of the outer container 10, the replacement operation of the inner container 20 can be easily performed. .
In addition, since the outer valve 10 is provided with an air valve 14 for taking in outside air, it is easily deformed when pressure is applied, and is reliably restored to its original shape when pressure is lost. In addition, it is possible to avoid the deterioration of handling and usability of the container.

In addition, since the backflow prevention valve 27 is provided that opens when the discharge pressure of the contents M is applied to the mouth portion 22 of the inner container 20 and closes when the discharge pressure disappears, the backflow prevention valve 27 is provided from the mouth portion 22 to the inner container 20. Inflow of air (oxygen) can be reliably prevented.
Furthermore, if the outer container 10 is formed of a transparent or translucent material, the remaining amount of the contents M in the inner container 20 can be easily grasped visually from the outside.

Further, the outer container 10 and the inner container 20 may have a structure as shown in FIGS. 8 and 9 in addition to a structure in which the outer container 10 and the inner container 20 are coupled by a screwing method as shown in FIG.
As shown in FIG. 3A, this structure forms a ring-shaped groove 23a on the outer peripheral surface of the lid portion 23 shown in FIG. 3 and the edge of the upper opening of the container body 11 of the outer container 10. Is provided with a ring-shaped protrusion 11a.

  And after attaching the cover part 23 to the opening | mouth part 22 as shown in FIG.8 (b), as shown in FIG.8 (c) and FIG.9 (b), from the bottom of the inner container 20, the outer container 10 is shown. The container main body 11 is covered, and the ring-shaped protrusion 11a is fitted into the groove 23a on the outer peripheral surface of the lid 23 to be coupled. Finally, as shown in FIG. 8D and FIG. 9C, the outer container 10 can be prevented from falling off by covering the outer periphery of the lid 23 with a pressing band 23b.

According to such a configuration, similar to the screwed structure as shown in FIG. 3, all the contents M are squeezed out and the empty inner container 20 is removed from the outer container 10 and easily replaced with a new inner container 20. can do.
Further, as shown in FIG. 10, an air hole 15 is formed in the upper portion of the container main body 11, and a strip-like film-like air valve 14 for opening and closing the air hole 15 is formed on the inner wall side of the container main body 11. If the attachment is made along the circumferential direction, the air hole 15 can be opened and closed more reliably.
That is, as shown in FIG. 11A, the inner side of the container body 11 is curved in a curved shape in the circumferential direction. For this reason, if a film-like air valve 14 having a strip shape along the circumferential direction of the container body 11 is attached, the movable part of the air valve 14 is strongly adhered to the air hole 15 side. The function as a check valve can be exhibited more reliably.

100: Double structure container (double container)
DESCRIPTION OF SYMBOLS 10 ... Outer container 11 ... Container main body 11a ... Protrusion 12 ... Mouth part 13 ... Thread 14 ... Air valve 15 ... Air hole 16 ... Valve body 20 ... Inner container 21 ... Container main body 22 ... Mouth part 23 ... Lid part 23a ... Groove 23b ... Presser band 24 ... Thread groove 25 ... Guide pipe 25a ... Upper opening 26 ... Inflow hole 27 ... Backflow prevention valve 28 ... Protrusion 29 ... Coil spring B ... Ball valve M ... Contents S ... Gap

Claims (8)

It is a double-structured container that has an inner container that deforms when pressure is applied and that returns to its original shape when pressure is lost, and that deforms when pressure is applied and does not restore its original shape when pressure is lost. And
A double-structured container comprising a guide pipe in communication with the mouth of the inner container in order to circulate the contents filled in the inner container. The double-structured container according to claim 1,
The guide pipe is formed with a plurality of inflow holes along the longitudinal direction thereof. The double-structured container according to claim 1 or 2,
The guide pipe has a T-shaped lower part, and has a double structure. The double-structured container according to any one of claims 1 to 3,
In the inner container, the mouth portion is detachable from the mouth portion of the outer container, and the outer diameter of the state filled with the contents is smaller than the mouth diameter of the mouth portion of the outer container. A double-structured container. In the double structure container according to any one of claims 1 to 4,
The outer container has a double structure characterized in that the bag-like container body has an air valve that closes when pressure is applied and opens and takes in external air when the pressure disappears and is restored to its original shape. container. The double-structured container according to claim 5,
The air valve comprises an air hole opened in the outer container and a film-like valve body that swings so as to open and close the air hole. The double-structured container according to any one of claims 1 to 6,
A double-structured container comprising a backflow prevention valve that opens when the discharge pressure of the contents is applied to the mouth of the inner container and closes when the discharge pressure disappears. The double-structured container according to any one of claims 1 to 7,
The outer container is made of a transparent or translucent material, and has a double structure.

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