JP7174342B2 - Container and container with inner stopper - Google Patents

Description

TECHNICAL FIELD The present invention relates to a container and a container with an inner stopper.

BACKGROUND ART Conventionally, there has been known a container composed of a combination of a cap provided with a storage portion and a beverage container main body filled with drinking water (for example, Patent Document 1). In the container disclosed in Patent Document 1, the cap is provided with an opening/closing lid that is arranged so as to cover a part of the cap. The push bar is configured to destroy a portion of the housing. By partially destroying the storage portion, the storage portion is opened, and the contents in the storage portion fall to the drinking water side. After that, the consumer can open the container by rotating the cap in the opening direction of the container and drink the beverage in which the drinking water and the contents are mixed.

JP 2017-159934 A

However, in the container shown in Patent Document 1, the container is only closed with a cap, and it is necessary to immediately close the container with the cap after filling the container with drinking water. In such a container, it is necessary to store the contents in the storage part of the cap in advance, and the order of the process of storing the contents in the storage part of the cap and the process of filling the container with drinking water is limited. There is a problem. There is therefore a need for a container that can be closed itself, for example inside the container.

SUMMARY OF THE INVENTION The present invention has been made in consideration of such points, and an object of the present invention is to provide a container and a container with an inner plug that can be closed inside the container.

The present invention comprises a first opening, a trunk connected to the first opening, and a second opening connected to the trunk, wherein the diameter of the second opening is the first opening. The container is provided with a support projection that is larger than the diameter of the opening and protrudes radially inward of the first opening on the inner surface of the first opening.

The present invention is the container, wherein the inner diameter of the body is larger than the diameter of the first mouth and the diameter of the second mouth.

The present invention is the container, wherein the support projection is provided over the entire circumference of the inner surface of the first opening.

The present invention is the container, wherein the inner surface of the first mouth is provided with at least three of the support projections spaced apart from each other.

The present invention is the container, wherein the amount of protrusion of the support protrusion in the radial direction from the inner surface of the first opening is 0.5 mm or more and 5.0 mm or less.

The present invention is a container with an inner stopper, comprising the container according to the present invention and an inner stopper attached to the support projection.

The present invention is a container with an inner plug according to claim 5, wherein the inner plug is detachably attached to the support projection.

According to the invention, the container can be closed on the inside.

FIG. 1 is a front view showing a container with an inner stopper according to one embodiment of the present invention. FIG. 2 is a vertical cross-sectional view showing a container with an inner stopper according to one embodiment of the present invention. FIG. 3 is a top view showing a container with an inner stopper according to one embodiment of the present invention. FIG. 4 is a vertical cross-sectional view showing a preform for making a container according to one embodiment of the invention. FIG. 5 is a cross-sectional view showing a mold for making a preform for making a container according to one embodiment of the present invention. 6(a)-(d) are cross-sectional views showing a method of manufacturing a preform for making a container according to one embodiment of the present invention. FIG. 7 is a vertical cross section showing a modification of the container with inner stopper according to one embodiment of the present invention. FIG. 8 is a top view showing a modification of the container according to one embodiment of the present invention.

An embodiment of the present invention will be described below with reference to the drawings. 1 to 6 are diagrams showing one embodiment of the present invention.

First, an outline of a container with an inner stopper according to the present embodiment will be described with reference to FIGS. 1 to 3. FIG. In this specification, the terms "upper" and "lower" respectively refer to the upper and lower sides of the container 10A with an inner stopper in a state in which the first opening 11A is upright (FIG. 1). Say.

(Configuration of container with inner stopper)
A container 10A with an inner stopper shown in FIGS. 1 to 3 includes a container 10 made of a plastic material and an inner stopper portion 50 (see FIG. 2) attached to a support projection 40 of the container 10, which will be described later. Of these, the container 10 is obtained by preparing a preform 10a obtained by injection molding and subjecting the preform 10a to biaxial stretch blow molding using a mold, as will be described later. .

As shown in FIGS. 1 and 2, the container 10 includes a first mouth portion 11A, a first shoulder portion 12A connected to the first mouth portion 11A, and a body portion 20 connected to the first shoulder portion 12A. , a second shoulder portion 12B connected to the body portion 20, a neck portion 13 connected to the second shoulder portion 12B, and a second mouth portion 11B connected to the neck portion 13.

Among them, the first mouth portion 11A has a first screw portion 14A to which a cap is screwed, as shown in FIGS. The shape of the first opening 11A may be a conventionally known shape, or may be a shape corresponding to a multi-screw type cap or a plugging type cap.

Further, as shown in FIG. 2, a support projection 40 is provided on the inner surface of the first opening 11A and protrudes inward in the radial direction of the first opening 11A. The support projection 40 is provided at the lower end of the inner surface of the first mouth portion 11A (the end portion on the first shoulder portion 12A side) and serves to support the inner plug portion 50 inserted into the container 10 . However, the present invention is not limited to this, and the support projection 40 may be provided on any portion of the inner surface of the first opening 11A. can be

Also, the amount of protrusion L in the radial direction from the inner surface of the first opening 11A of the support projection 40 may be 0.5 mm or more and 5.0 mm or less. By setting the amount of protrusion L in the radial direction to 0.5 mm or more, for example, it is possible to prevent the inner plug portion 50 from falling off from the support projection 40 during transportation of the inner plug-equipped container 10A. Further, by setting the amount of protrusion L in the radial direction to 5.0 mm or less, it is possible to improve moldability during injection molding of the preform 10a, which will be described later. Moreover, in the present embodiment, as shown in FIG. 3, the support projection 40 is provided over the entire circumference of the inner surface of the first mouth portion 11A. This allows the support projection 40 to firmly support the inner plug portion 50 .

Further, as shown in FIG. 2, the first shoulder portion 12A connected to the first mouth portion 11A has a shape that slopes downward from the inside toward the outside in a vertical cross section.

Moreover, the trunk|drum 20 has a cylindrical shape with a substantially uniform diameter as a whole. However, the shape is not limited to this, and the trunk portion 20 may have a polygonal tubular shape such as a quadrangular tubular shape or an octagonal tubular shape. Alternatively, the body 20 may have a cylindrical shape with a non-uniform horizontal cross-section from top to bottom. Moreover, in the present embodiment, the trunk portion 20 has no irregularities and has a substantially flat surface, but the surface is not limited to this. For example, the body portion 20 may be formed with unevenness such as panels or grooves. In addition, the inner diameter RC of such a trunk portion 20 is larger than the diameter RA of the first mouth portion 11A and the diameter RB of the second mouth portion 11B. As a result, the full filling capacity of the container 10 can be increased.

Further, the second shoulder portion 12B has a shape in which the diameter gradually decreases from the body portion 20 side toward the neck portion 13 side in a vertical cross section.

The neck portion 13 is positioned between the second shoulder portion 12B and the second mouth portion 11B and has a substantially cylindrical shape with a substantially uniform diameter.

Further, as shown in FIGS. 1 and 2, the second mouth portion 11B has a second threaded portion 14B to which a cap is screwed and a flange portion 17B provided above the second threaded portion 14B. there is The shape of the second opening 11B may be a conventionally known shape, or may be a shape corresponding to a multi-screw type cap or a plugging type cap.

Further, the diameter RB of the second opening 11B is larger than the diameter RA of the first opening 11A. This makes it easier to insert the inner plug portion 50 attached to the support projection 40 provided on the inner surface of the first mouth portion 11A into the container 10 from the second mouth portion 11B. Therefore, by inserting the inner plug portion 50 into the container 10 from the second mouth portion 11B and attaching the inner plug portion 50 to the support projection 40, the inner plug portion 50 can seal the inside of the container 10. It is possible.

Moreover, in such a container 10, the thickness of the container 10 at the body portion 20 is not limited to this, but can be, for example, 0.6 mm or more and 1.0 mm or less. By setting the thickness of the container 10 to 0.6 mm or more in this manner, pressure resistance and heat resistance can be imparted to the container 10 . Furthermore, the weight of the container 10 is also not limited to this, but can be 20 g or more and 45 g or less.

Such a container 10 can be produced by biaxially stretching blow molding a preform 10a (described later) produced by injection molding a synthetic resin material. It is preferable to use a thermoplastic resin, particularly PP (polypropylene), PE (polyethylene), and PET (polyethylene terephthalate), as the material of the preform, that is, the container 10 . Note that the container 10 may be manufactured by injection molding.

Further, such a container 10 may be a container having a full filling capacity of 100 ml or more and 1000 ml or less. As described above, since the container 10 is obtained by subjecting the preform 10a to biaxial stretch blow molding, such a full-filled container can be easily obtained.

Further, as described above, the container 10</b>A with the inner stopper includes the inner stopper portion 50 attached to the support protrusion 40 of the container 10 . The inner plug portion 50 serves to seal the container 10 inside.

The inner plug portion 50 includes a disk-shaped body portion 51, a concave portion 52 formed on the outer surface of the body portion 51 and recessed radially inward of the body portion 51, and a first opening extending upward from the body portion 51. and a projecting portion 53 that contacts the inner surface of 11A. The inner plug portion 50 is attached to the container 10 so that the protruding portion 53 is in close contact with the inner surface of the first mouth portion 11A of the container 10 by engaging the recessed portion 52 with the support projection 40 of the container 10. . Further, in the present embodiment, the inner plug portion 50 is detachably attached to the support projection 40 . That is, in the container 10A with an inner stopper, the inner stopper part 50 seals the inside of the container 10, and presses the inner stopper part 50 from above, so that the inner stopper part 50 is attached to the support projection 40 so that it can be dropped from the support projection 40. installed. The inner plug portion 50 can be made of a gas-barrier resin such as butylene rubber. Note that the inner plug portion 50 may have any shape as long as it can be engaged with the support projection 40 .

(Preform configuration)
Next, the configuration of the preform according to this embodiment will be described with reference to FIG.

As shown in FIG. 4, the preform 10a includes a first mouth portion 11a, a shoulder portion 12a connected to the first mouth portion 11a, and a body portion connected to the first mouth portion 11a via the shoulder portion 12a. 20a, a neck portion 13a connected to the body portion 20a, and a second mouth portion 11b connected to the body portion 20a via the neck portion 13a. The first mouth portion 11a corresponds to the first mouth portion 11A of the container 10 described above, and has substantially the same shape as the first mouth portion 11A. Also, the first mouth portion 11 a has a first threaded portion 14 a corresponding to the first threaded portion 14 A of the container 10 . The shape of the first opening 11a may be a conventionally known shape, or may be a shape corresponding to a multi-screw type cap or a plugging type cap.

Further, a support projection 40a is provided on the inner surface of the first opening 11a and protrudes radially inward of the first opening 11a. This support projection 40a corresponds to the support projection 40 of the container 10 described above, and is provided over the entire circumference of the inner surface of the first mouth portion 11a.

The shoulder portion 12a corresponds to the first shoulder portion 12A of the container 10 described above, and has a shape whose diameter gradually increases from the first mouth portion 11a side toward the body portion 20a side. .

Further, the body portion 20a corresponds to the body portion 20 of the container 10 described above, and has a substantially cylindrical shape. The neck portion 13a corresponds to the neck portion 13 of the container 10 described above, and has a substantially cylindrical shape.

The second mouth portion 11b includes a second screw portion 14b corresponding to the second screw portion 14B of the container 10 and a flange portion 17b provided above the second screw portion 14b and corresponding to the flange portion 17B of the container 10. and The shape of the second mouth portion 11b may be a conventionally known shape, or may be a shape corresponding to a multi-screw type cap or a plugging type cap.

Further, the diameter Rb of the second opening 11b is larger than the diameter Ra of the first opening 11a. As a result, when the container 10 is produced by biaxially stretch blow molding the preform 10a, the diameter RB of the second opening 11B of the container 10 can be made larger than the diameter RA of the first opening 11A. .

(Mold configuration)
Next, a mold 60 for manufacturing the preform 10a by injection molding a synthetic resin material will be described with reference to FIG.

As shown in FIG. 5, the mold 60 has a pair of cavity molds 61a and 61b and a pair of cores 62a and 62b housed in the pair of cavity molds 61a and 61b. Of these, the pair of molds with cavities 61a and 61b are configured to be openable and closable, and in a state in which the pair of cores 62a and 62b are housed in the closed pair of molds with cavities 61a and 61b, the cavities The preform 10a is produced by injecting the injection resin into the spaces between the attached molds 61a, 61b and the cores 62a, 62b.

Further, of the pair of cores 62a and 62b, the lower end of the core 62a is formed with a concave portion 63a corresponding to a part of the support projection 40a of the preform 10a described above, and the upper end of the core 62b is formed with the above-described A recess 63b corresponding to a part of the support projection 40a of the preform 10a is formed. Specifically, at the lower end of the core 62a, a recess 63a is formed corresponding to a portion of the support projection 40a above the portion where the amount of protrusion from the inner surface of the first opening 11a is the maximum. The upper end of the core 62b is formed with a recess 63b corresponding to a portion of the support projection 40a below the portion where the amount of protrusion from the inner surface of the first mouth portion 11a is maximum. As a result, even in the preform 10a having the support projections 40a protruding radially inward on the inner surface of the first opening 11a, the core 62a can be pulled upward and the core 62b can be pulled downward. , so that it can be taken out from the mold 60 .

Next, the operation of this embodiment having such a configuration will be described. Here, a method for manufacturing the preform 10a and a method for manufacturing the container 10 will be described.

First, a method for manufacturing the preform 10a will be described with reference to FIGS. 6(a) to 6(d).

First, a mold 60 having a pair of cavity molds 61a and 61b and a pair of cores 62a and 62b is prepared.

Next, as shown in FIG. 6A, the pair of molds with cavities 61a and 61b are closed, and the pair of cores 62a and 62b are accommodated in the pair of molds with cavities 61a and 61b. In this way, as shown in FIG. 6B, a pair of molds with cavities 61a, 61b and a pair of cores 62a, 62b are clamped.

Next, as shown in FIG. 6(c), injection resin is injected into the mold 60. Then, as shown in FIG. At this time, the injection resin is injected into the space between the molds 61a, 61b with cavities and the cores 62a, 62b from a gate (injection port) (not shown). The injected injection resin enters between the molds 61a, 61b with cavities and the cores 62a, 62b, and the preform 10a is molded by this injection resin.

Then, as shown in FIG. 6(d), the obtained preform 10a is removed from the mold 60 to the outside. At this time, of the pair of cores 62a and 62b, the lower end of the core 62a is formed with a concave portion 63a corresponding to a part of the support projection 40a of the preform 10a described above, and the upper end of the core 62b is formed at the upper end of the core 62b. A concave portion 63b corresponding to a part of the support projection 40a of the preform 10a is formed. As a result, even in the preform 10a having the support projections 40 extending radially inward on the inner surface of the first opening 11a, the core 62a is pulled upward and the core 62b is pulled downward. It can be removed from the mold 60 .

Next, the preform 10a is subjected to biaxial stretch blow molding. At this time, the body portion 20a of the preform 10a is stretched, but the first mouth portion 11a and the second mouth portion 11b of the preform 10a are not stretched. As a result, in the container 10, the inner diameter RC of the body portion 20 becomes larger than the diameter RA of the first opening 11A and the diameter RB of the second opening 11B (see FIG. 2). In addition, since the first mouth portion 11a of the preform 10a is not stretched, the support projections 40a provided on the inner surface of the first mouth portion 11a are also not stretched. 40 is provided (see FIG. 2).

Thus, container 10 is obtained.

After that, by attaching the inner plug portion 50 to the container 10, the inner plug-equipped container 10A is produced. In this case, the inner plug portion 50 is inserted into the container 10 from the second mouth portion 11B of the container 10 . At this time, the diameter RB of the second opening 11B is larger than the diameter RA of the first opening 11A. This makes it easier to insert the inner plug portion 50 from the second mouth portion 11B. Then, the inside of the container 10 is sealed by the inner plug portion 50, and the inner plug-equipped container 10A as shown in FIGS. 1 and 2 is obtained.

When filling the container 10A with the inner stopper, the contents are filled from the second opening 11B, and the second opening 11B is closed with a second cap (not shown). Further, for example, the space defined by the first mouth portion 11A and the inner plug portion 50 is filled with other contents. After that, the first opening 11A is closed with a first cap (not shown). Thus, the container 10A with inner stopper filled with the content can be obtained.

As described above, according to the present embodiment, the diameter RB of the second opening 11B is larger than the diameter RA of the first opening 11A, and the inner surface of the first opening 11A is radially inward. A support projection 40 is provided extending to the . As a result, the inner plug portion 50 can be easily inserted into the container 10 through the second mouth portion 11</b>B, and the inner plug portion 50 can be supported by the support projections 40 . Therefore, the container 10 can be sealed inside.

Moreover, in the present embodiment, the support projection 40 is provided over the entire circumference of the inner surface of the first mouth portion 11A. As a result, the inner plug portion 50 can be firmly supported, and for example, it is possible to prevent the inner plug portion 50 from falling off from the support protrusion 40 during transportation of the container 10A with the inner plug.

In addition, according to the present embodiment described above, an example in which the container 10A with an inner stopper includes the inner stopper portion 50 detachably attached to the support projection 40 has been described, but the present invention is not limited to this. For example, as shown in FIG. 7, a container 10A with an inner stopper may include an inner stopper portion 50A adhered to the support projection 40. As shown in FIG. In this case, as the inner plug portion 50A, for example, a film of PP (polypropylene), PET (polyethylene terephthalate), PE (polyethylene), aluminum foil, a PET film deposited with a metal film, or a laminate thereof may be used. can be done. Further, the inner plug portion 50A may be attached to the support projection 40 with an adhesive, or may be attached to the support projection 40 by, for example, heat sealing or ultrasonic bonding. Further, in this case, as shown in FIG. 7, the inner plug portion 50 may be inserted from the first opening 11A side and adhered to the support projection 40 . At this time, the amount of protrusion L in the radial direction from the inner surface of the first opening 11A of the support protrusion 40 may be 2.0 mm or more and 5.0 mm or less. By setting the amount of protrusion L in the radial direction to be 2.0 mm or more, the inner plug portion 50 can be easily adhered to the support projection 40 . In addition, when opening the container 10A with the inner plug, the inner plug portion 50A can be pierced to be opened.

Further, in the present embodiment described above, an example in which the support projection 40 is provided over the entire circumference of the inner surface of the first mouth portion 11A has been described, but the present invention is not limited to this. For example, as shown in FIG. 8, at least three supporting protrusions 40A that are spaced apart from each other may be provided on the inner surface of the first opening 11A. In this modified example, the support projections 40A are provided so as to be evenly distributed by a predetermined angle in the circumferential direction, specifically, to be evenly distributed by 120°. In this case also, the container 10 can be closed by supporting the inner plug portion 50 with the support projection 40A. Note that the number of support protrusions 40A is not limited to three, and may be four or more.

It is also possible to appropriately combine a plurality of constituent elements disclosed in the above embodiments and modifications as necessary. Alternatively, some components may be deleted from all the components shown in the above embodiments and modifications.

10 Container 10A Container with Inner Plug 11A First Opening 11B Second Opening 20 Body 40 Supporting Protrusion 50 Inner Plug 50A Inner Plug RA Diameter RB Diameter RC Inner Diameter

Claims (7)

a container;
A container with an inner stopper, comprising an inner stopper attached to the container,
The container is
a first mouth;
a trunk connected to the first mouth;
and a second mouth connected to the body,
The diameter of the second opening is larger than the diameter of the first opening,
a support projection protruding radially inward of the first opening is provided on the inner surface of the first opening,
The support projection is a ring-shaped projection having no ends in the circumferential direction,
The inner plug portion
a main body;
a concave portion formed on the outer surface of the body portion and recessed radially inward of the body portion;
The inner plug portion is attached to the container such that the inner plug portion is in close contact with the inner surface of the first mouth portion by bringing the recess into close contact with the support projection over the entire circumference . container with. 2. The container with an inner stopper according to claim 1 , wherein the inner surface of the first opening is provided with at least three of the support projections spaced apart from each other . a container;
A container with an inner stopper, comprising an inner stopper attached to the container,
The container is
a first mouth;
a trunk connected to the first mouth;
and a second mouth connected to the body,
The diameter of the second opening is larger than the diameter of the first opening,
a support projection protruding radially inward of the first opening is provided on the inner surface of the first opening,
The inner plug portion
a main body;
a concave portion formed on the outer surface of the body portion and recessed radially inward of the body portion;
The inner plug portion is attached to the container such that the inner plug portion is in close contact with the inner surface of the first mouth portion by engaging the recess with the support projection,
A container with an inner stopper, wherein the inner surface of the first opening is provided with at least three of the support projections spaced apart from each other. a container;
A container with an inner stopper, comprising an inner stopper attached to the container,
The container is
a first mouth;
a trunk connected to the first mouth;
and a second mouth connected to the body,
The diameter of the second opening is larger than the diameter of the first opening,
At least three supporting projections projecting radially inward of the first opening and spaced apart from each other are provided on the inner surface of the first opening,
A container with an inner stopper, wherein the inner stopper is attached to the support projection. The container with an inner stopper according to any one of claims 1 to 4, wherein the inner diameter of the body is larger than the diameter of the first mouth and the diameter of the second mouth. 6. The inner plug portion according to any one of claims 1 to 5, wherein the amount of protrusion of the support protrusion in the radial direction from the inner surface of the first mouth portion is 0.5 mm or more and 5.0 mm or less. container with. The container with an inner stopper according to any one of claims 1 to 6, wherein the inner stopper is detachably attached to the support projection.

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