JP2023163808A - double container - Google Patents

Abstract

To provide a double container which can effectively prevent an inner container from being elastically deformed and becoming difficult to remove when the inner container is removed from an outer container.SOLUTION: An inner container has: a flange part; an annular peripheral wall part which is provided hanging from an end edge of the flange part; and first screw parts and notch parts formed at the annular peripheral wall part. An outer container has: a neck cylinder part; projection parts which are formed at the neck cylinder part and respectively fitted in the notch parts; and second screw parts which are respectively formed at the projection parts and form the same spirals as those of the first screw parts. An exterior lid has: a top wall part; a peripheral wall part hanging from an end edge of the top wall part; and a third screw part which is formed on an inner peripheral wall of the peripheral wall part and may threadedly engage with the first screw parts and the second screw parts.SELECTED DRAWING: Figure 1

Description

The present invention relates to a double container that combines an inner container and an outer container.

A double container is used, which includes an inner container that stores contents such as cream, an outer container that removably stores the inner container, and a bottomed cylindrical outer lid that can be attached to the inner container and the outer container. It is being Such an inner container is a refill container that can be put in and taken out of the outer container, and the outer container can be reused by the consumer removing the inner container stored in the outer container and replacing it with a new inner container. (See Patent Document 1).

In such a double container, the inner container and the outer container are each provided with a positioning structure, allowing the inner container to be inserted into the outer container in a predetermined direction. Further, the inner container and the outer container each have a threaded structure formed therein, and when the inner container is housed in the outer container in a predetermined direction due to the positioning structure, these threaded structures form the same spiral. This makes it possible to screw the outer lid onto both the inner container and the outer container.

As a structure for positioning the inner container and the outer container, for example, a tongue piece is provided near the opening of one of the inner container and the outer container, a notch is formed near the opening of the other, and the tongue piece and A structure is used in which the inner container and the outer container are positioned by fitting the notches. When adopting this structure, when the inner container is positioned and housed in the outer container, a threaded structure is formed so as to reach the outer peripheral surface of one of the inner container and the outer container and the surface of the tongue of the other, By threading the outer lid, which is a cylindrical crested overcap and has a threaded structure formed on the inner circumferential surface, into this threaded structure, the outer lid can be attached to the outer container and the inner container.

Japanese Patent Application Publication No. 2018-034836

By the way, in the conventional double container having the above-mentioned configuration, when removing the inner container from the outer container, the inner container is removed by placing a finger on the tongue of the inner container. At this time, since the tongue piece has a thin structure, if you press it with your finger, it will elastically deform and bend inward in the radial direction, and it will be pressed against the neck cylinder of the outer container located inside, which may make it difficult to remove the inner container. was there.

The present invention aims to solve such problems, and provides a double container that can be easily removed even if a pressing force is applied to the inner container when removing the inner container from the outer container. The purpose is to provide

The present invention provides a double container comprising an inner container for storing contents, an outer container for removably accommodating the inner container, and an outer lid detachably attached to the outer container, The inner container includes an outer flange portion, an annular peripheral wall portion hanging from an edge of the flange portion, a first threaded portion formed in the annular peripheral wall portion, and a portion of the annular peripheral wall portion. The outer container has a neck barrel part in which an opening is formed, and a neck barrel part that is formed to protrude radially outward from the neck barrel part and has a cutout part formed by cutting out the neck barrel part. a fitting protrusion, and a first screw formed on the protrusion that forms the same spiral as the first threaded part when the inner container is accommodated in the outer container by fitting the protrusion into the notch. The exterior lid has a top wall, a cylindrical peripheral wall hanging from an edge of the top wall, and a first screw formed on the inner peripheral surface of the peripheral wall. The present invention is characterized in that it is a double container having a third screw portion that can be screwed together with the second screw portion.

In the above-mentioned double container, it is preferable that an end of a spiral portion formed by the first threaded portion and the second threaded portion on the top wall side is located at the protrusion.

Regarding the double container, the inner container is formed with a plurality of notches each having a different shape, and the outer container is provided with a plurality of cutouts each having a different shape so as to fit into the notches. Preferably, a protrusion is formed.

Further, in the double container, the inner container is formed with the two notches having the same shape, and the outer container is formed with the two protrusions having the same shape. Preferably, the first threaded portion, the second threaded portion, and the third threaded portion are double thread threads.

According to the double container of the present invention, it is possible to effectively prevent the inner container from being elastically deformed and becoming difficult to remove when the inner container is removed from the outer container.

FIG. 1 is a front partial sectional view showing a double container according to an embodiment of the present invention. FIG. 2 is a right side view showing the double container according to the embodiment of the present invention with the outer lid removed. FIG. 2 is a right side partial sectional view showing a state in which an inner container lid is attached to an inner container used in a double container according to an embodiment of the present invention. FIG. 2 is a right side perspective view showing a state in which an inner container lid is attached to an inner container used in a double container according to an embodiment of the present invention. It is a left side perspective view showing an inner container used for a double container concerning an embodiment of the present invention. It is a right side perspective view which shows the outer container used for the double container based on embodiment of this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a double container according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front partial sectional view showing a double container 1 according to an embodiment of the present invention. FIG. 2 is a side view showing the double container 1 according to the embodiment of the present invention with the outer lid 4 removed.

As shown in FIGS. 1 and 2, the double container 1 includes an inner container 2 that stores contents, an outer container 3 that removably stores the inner container 2, and an outer container that is removably attached to the outer container 3. It is equipped with a lid 4.

FIG. 3 is a right side partial sectional view showing a state in which the inner container lid 5 is attached to the inner container 2 used in the double container 1 according to the embodiment of the present invention. FIG. 4 is a right side perspective view showing a state in which the inner container lid 5 is attached to the inner container 2 used in the double container 1 according to the embodiment of the present invention. FIG. 5 is a left side perspective view showing the inner container 2 used in the double container 1 according to the embodiment of the present invention.

As shown in FIGS. 1 to 5, the inner container 2 includes a bottomed cylindrical inner container body 21, an outer flange 22 formed at the periphery of the upper opening of the inner container body 21, and a flange portion 22 formed at the periphery of the upper opening of the inner container body 21. An annular peripheral wall part 23 hanging down from the edge of the part 22, first screw parts 28a and 28b formed in the annular peripheral wall part 23, and a notch part formed by cutting out a part of the annular peripheral wall part. 24a and 24b. In this embodiment, the inner container 2 is entirely integrally formed of synthetic resin.

The inner container body 21 is a cylindrical container with a bottom in which contents such as cream are stored.

The flange portion 22 is formed continuously with the opening of the inner container main body portion 21 and has an annular configuration in a plan view, and has an annular protrusion 27 formed on the surface along the circumferential direction. By having this narrow annular protrusion 27, when the outer lid 4 and the inner container lid 5 are attached, the space between the flange part 22 and the top wall part 41 of the outer lid 4, and between the flange part 22 and the inner container lid The contact area between the outer lid 4 and the inner container lid 5 can be reduced by reducing the contact area between the outer lid 4 and the inner container lid 5 (see FIG. 3). , 51 is increased, and sealing performance can be improved when the outer lid 4 and the inner container lid 5 are attached.

The annular peripheral wall part 23 is an annular wall part formed to hang down from the peripheral part of the flange part 22, and the first screw parts 28a and 28b used for attaching the exterior lid 4 are formed on the outer peripheral surface of the notch part 24a. , 24b are formed intermittently. Further, above the first threaded parts 28a and 28b, the annular peripheral wall part 23 has a reduced diameter part 25 in which the outer diameter becomes smaller, and this reduced diameter part 25 has an upper threaded part used for attaching the inner container lid 5. 26 is formed.

In the annular peripheral wall portion 23, large and small notches 24a and 24b, which are used for positioning with the outer container 3, are formed at opposing positions. These two notches 24a and 24b have different widths in the radial direction, and can be fitted with protrusions 33a and 33b, which will be described later, formed on the outer container 3 (see FIG. 6).

The circumferential length of the notches 24a, 24b is smaller than 1/2, preferably smaller than 1/4, of the circumferential length of the flange portion 22. Since the circumferential length of the notches 24a and 24b is smaller than 1/2 of the circumferential length of the flange portion 22, the user can touch the annular circumferential wall portion with his or her fingers when removing the inner container 2 from the outer container 3. It is possible to prevent the annular peripheral wall portion 23 from elastically deforming and bending inward in the radial direction when the inner container 23 is pinched, and the inner container 2 can be easily removed. Further, since the circumferential length of the notches 24a and 24b is smaller than 1/4 of the circumferential length of the flange portion 22, inward deformation of the annular peripheral wall portion 23 can be further reliably prevented. I can do it.

FIG. 6 is a right side perspective view showing the outer container 3 used in the double container 1 according to the embodiment of the present invention. As shown in FIGS. 1, 2, and 6, the outer container 3 includes a bottomed cylindrical outer container body 31, and a neck that is continuously formed above the outer container body 31 and has an opening. A cylindrical portion 32, large and small protrusions 33a and 33b formed to protrude radially outward from the neck tube portion 32 and fit into the notches, and a second threaded portion 34a formed on the protrusions 33a and 33b, 34b. In this embodiment, the entire outer container 3 is integrally formed of synthetic resin.

The outer container body 31 is a cylindrical container with a bottom that can accommodate at least a portion of the inner container 2.

The neck cylinder part 32 has a cylindrical structure formed continuously with the outer container main body part 31 so that its inner circumferential surface is continuous with the outer container main body part 31 and its outer diameter is reduced.

The protrusions 33a and 33b have a substantially rectangular structure protruding from the outer peripheral surface of the neck tube part 32, and have different widths in the radial direction. These protrusions 33a, 33b can fit into the cutouts 24a, 24b of the inner container 2, and by fitting the protrusions 33a, 33b with the cutouts 24a, 24b, the inside of the outer container 3 can be fitted. The inner container 2 can be positioned in the rotational direction.

Second screw portions 34a, 34b are formed on the surfaces of the protrusions 33a, 33b. The second threaded parts 34a, 34b have the same spiral as the first threaded parts 28a, 28b when the inner container 2 is housed in the outer container 3 and the projections 33a, 33b are fitted into the cutouts 24a, 24b. ie formed into one threaded structure.

The shapes of the notches 24a and 24b and the shapes of the protrusions 33a and 33b are different from each other, and the protrusion 33a can be fitted only to the notch 24a, and the protrusion 33b can be fitted only to the notch 24b. When the container 2 is housed in the outer container 3, it is possible to form one threaded structure without the first threaded part 28 and the second threaded parts 34a, 34b shifting.

The outer lid 4 is a capped cylindrical overcap body that is screwed onto the inner container 2 and the outer container 3, and includes a disk-shaped top wall portion 41 and a cylindrical shape that hangs down from the edge of the top wall portion 41. and a third screw portion 43 formed on the inner peripheral surface of the peripheral wall portion 42 and capable of being screwed into the first screw portions 28a, 28b and the second screw portions 34a, 34b. A packing 44 is attached to the lower surface of the ceiling wall portion 41. In this embodiment, the entire exterior lid 4 except for the packing 44 is integrally formed of synthetic resin.

Next, the operation of the double container 1 having the above-described configuration will be explained.

When the contents in the inner container 2 run out, the outer container 3 can be reused by replacing the inner container 2 housed in the outer container 3 with a new inner container 2.

Specifically, first, as shown in FIG. 1, the double container 1 with the outer lid 4 attached thereto is made into a state in which the outer lid 4 is removed, as shown in FIG.

At this time, as the user rotates the exterior lid 4 by hand, the threading between the third threaded part 43 and the first threaded parts 28a, 28b and second threaded parts 34a, 34b is gradually released. The upper end 34a1 of the threaded structure formed by the first threaded parts 28a, 28b and the second threaded parts 34a, 34b is formed on the projection 33a of the outer container 3, so that the third threaded part 43 and the first threaded The outer lid 4 cannot be removed from the outer container 3 until the threaded engagement with the parts 28a, 28b and the second threaded parts 34a, 34b is completely released. Thereby, it is possible to effectively prevent the inner container 2 from also coming off when the outer lid 4 is removed.

Then, when the outer lid 4 is removed and the inner container 2 inside the outer container 3 is exposed to the outside, the inner container 2 can be taken out from the outer container 3.

When removing the inner container 2 from the outer container 3, the user pinches the annular peripheral wall portion 23 with his or her fingers, but the length of the notches 24a and 24b in the circumferential direction is ensured to be sufficiently long. By doing so, it is possible to prevent the annular peripheral wall portion 23 from elastically deforming and bending inward in the radial direction when the annular peripheral wall portion 23 is pinched, and the inner container 2 can be easily removed. .

After the used inner container 2 is removed from the outer container 3 in this way, a new inner container 2 containing the contents is placed in the empty outer container 3. At this time, the new inner container 2 has an inner container lid 5 attached thereto, as shown in FIGS. 3 and 4, to prevent the contents from leaking. The inner container lid 5 is a capped cylindrical overcap body that is screwed onto the inner container 2, and includes a disk-shaped top wall portion 51 and an uneven operation surface 521 hanging from the edge of the top wall portion 51. It has a cylindrical peripheral wall portion 52 having a cylindrical shape formed thereon, and a lid screw portion 53 formed on the inner peripheral surface of the peripheral wall portion 52 and capable of being screwed into the upper screw portion 26 . A packing 54 is attached to the lower surface of the ceiling wall portion 51. In this embodiment, the entire inner container lid 5 except for the packing 54 is integrally formed of synthetic resin. With this inner container lid 5 attached to the inner container 2, the inner container 2 can be distributed as a refill container.

Next, after removing the inner container lid 5 from the inner container 2 housed in the outer container 3, the outer lid 4 is attached to the inner container 2 and the outer container 3. Here, when the inner container 2 is housed in the outer container 3, the neck tube portion 32 of the outer container 3 is inserted into the gap formed between the inner container main body 21 and the annular peripheral wall portion 23 of the inner container 2. The protrusions 33a, 33b are inserted into the annular peripheral wall 23, and the protrusions 33a, 33b are exposed to the outside from the notches 24a, 24b formed in the annular peripheral wall 23. Since the first threaded portions 28a, 28b and the second threaded portions 34a, 34b form the same spiral, the outer lid 4 can be attached to the inner container 2 and the outer container 3. In this way, the replacement of the inner container 2 is completed, and the outer container 3 is reused.

Note that the present invention is not limited to the embodiments described above, and various modifications can be made.

For example, in the embodiment described above, the inner container 2 is provided with two notches 24a and 24b, and the outer container 3 is provided with two protrusions 33a and 33b, but the present invention is not limited to this. In addition to providing one or more notches, the outer container 3 may also be provided with one or more protrusions corresponding thereto. Also in this case, the upper end of the threaded structure formed by the first threaded part and the second threaded part is formed on the protrusion of the outer container 3, so that the double container 1 according to the above-described embodiment Similarly, it is possible to effectively prevent the inner container 2 from detaching when the outer lid 4 is removed.

In addition, when the inner container 2 is provided with three or more notches and the outer container 3 is provided with three or more protrusions, the first threaded portion and the second threaded portion form one spiral and are integrated into a single spiral. It is necessary to align the inner container 2 at a predetermined position within the outer container 3 so that the threaded structure is obtained. Therefore, the plurality of notches may be made to have different shapes, and the plurality of protrusions may also be made to have different shapes so that they can fit into these. As a result, the first threaded portion and the second threaded portion form a single threaded structure, making it possible to attach the exterior lid 4. Also in this case, the upper end of the threaded structure formed by the first threaded part and the second threaded part is formed on the protrusion of the outer container 3, so that the double-layer structure according to the above-described embodiment is Similarly to the container 1, the inner container 2 can be effectively prevented from detaching when the outer lid 4 is removed.

In addition, in the case where the inner container 2 is provided with a plurality of notches and the outer container 3 is provided with a plurality of protrusions, all the notches should have the same shape, and all the protrusions should also have the same shape. The distance between the notches in the circumferential direction of the container 2 and the distance between the protrusions in the circumferential direction of the outer container 3 may be made non-uniform. With such a configuration, the inner container 2 can also be positioned at a predetermined position in the outer container 3, and the first threaded portion and the second threaded portion form a single threaded structure, making it possible to attach the outer lid 4. It becomes possible to do this. Also in this case, the upper end of the threaded structure formed by the first threaded part and the second threaded part is formed on the protrusion of the outer container 3, so that the double container 1 according to the above-described embodiment Similarly, it is possible to effectively prevent the inner container 2 from detaching when the outer lid 4 is removed.

Furthermore, when the inner container 2 is provided with two notches 24a, 24b and the outer container 3 is provided with two protrusions 33a, 33b, the notches 24a, 24b should have the same shape, and the protrusions 33a, 33b The shapes are also the same, cutouts 24a and 24b are formed at opposing positions in the circumferential direction of the inner container 2, protrusions 33a and 33b are formed at opposing positions in the circumferential direction of the outer container 3, and the first screw The second threaded portion and the third threaded portion of the exterior lid 4 may be double threaded. According to such a configuration, when the inner container 2 is housed in the outer container 3, the same screw structure can be formed no matter which combination of the first threaded portion and the second threaded portion are fitted, and the outer lid 4 can be installed. In this case as well, the upper end portions of the double threaded structure formed by the first threaded portion and the second threaded portion are formed on the projections 33a and 33b of the outer container 3, respectively. Similar to the double container 1, it is possible to effectively prevent the inner container 2 from detaching when the outer lid 4 is removed.

1: Double container 2: Inner container 3: Outer container 4: Exterior lid 5: Inner container lid 21: Inner container main body portion 22: Flange portion 23: Annular peripheral wall portions 24a, 24b: Notch portion 25: Reduced diameter portion 26: Upper threaded part 28: First threaded part 31: Outer container main body part 32: Neck cylinder parts 33a, 33b: Projections 34a, 34b: Second threaded part 34a1: Upper end part 41: Top wall part 42: Peripheral wall part 43: First 3 Threaded portion 44: Packing 51: Top wall portion 52: Peripheral wall portion 53: Lid screw portion 54: Packing 521: Operation surface

Claims (4)

A double container comprising an inner container that stores contents, an outer container that removably stores the inner container, and an outer lid that is removably attached to the inner container and the outer container,
The inner container includes an outer flange portion, an annular peripheral wall portion hanging from an edge of the flange portion, a first screw portion formed in the annular peripheral wall portion, and a first screw portion formed in the annular peripheral wall portion. It has a cutout part formed by cutting out a part,
The outer container includes a neck barrel portion in which an opening is formed, a protrusion portion that is formed to protrude radially outward from the neck barrel portion and fits into the notch portion, and a protrusion formed on the protrusion portion. a second screw portion that forms the same spiral as the first screw portion when the inner container is housed in the outer container by fitting the inner container into the notch portion;
The exterior lid includes a top wall portion, a cylindrical peripheral wall portion hanging from an edge of the top wall portion, and the first screw portion and the second screw portion formed on the inner peripheral surface of the peripheral wall portion. A double container having a third screw portion that can be screwed together. The double container according to claim 1, wherein an end of the spiral portion formed by the first threaded portion and the second threaded portion on the top wall side is located at the protrusion. A plurality of notches each having a different shape are formed in the inner container, and a plurality of protrusions each having a different shape are formed in the outer container so as to fit into the notches. The double container according to claim 1. The two notches having the same shape are formed in the inner container, and the two protrusions having the same shape are formed in the outer container. The double container according to claim 1, wherein the second threaded portion and the third threaded portion are double threaded.

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