JP7039207B2 - Double container - Google Patents

Description

The present invention relates to a double container having a double structure in which an inner layer containing the contents is housed inside the outer layer, and only the inner layer is contracted when the contents are poured out.

Conventionally, as a container for storing contents such as cosmetics such as shampoo, rinse, liquid soap and lotion, food seasonings such as mirin, cooking liquor, soy sauce and sauce, or contents such as medicines, an inner layer for accommodating the contents. A double container (derami container) is known, which is provided with a body and an outer layer body that detachably accommodates the inner layer body, and the contents are poured out from a pouring cap attached to the mouth of the outer layer body. (For example, Patent Document 1). The double container can maintain the inner layer in a volume-reduced state by introducing outside air between the inner layer and the outer layer through the openings provided in the outer layer when the contents are poured out. It is possible to suppress the replacement of the contents inside the inner layer with the outside air with the injection of the material, and to avoid the contact between the contents and the outside air as much as possible.

Japanese Unexamined Patent Publication No. 2016-193736

By the way, among the food seasonings and chemicals contained in the container, there is a type in which the first agent and the second agent are mixed and used. Some such food seasonings and chemicals lose their flavor and efficacy unless mixed immediately before use. However, since the conventional laminated peeling type double container can provide only one storage space for the contents, the first agent and the second agent are stored in different containers and stored immediately before use. It is necessary to mix and use the contents of the container. Therefore, it becomes necessary to manage a plurality of different containers collectively, and the procedure for mixing the contents is complicated.

An object of the present invention is to solve such a problem, and an object of the present invention is to separate and accommodate a plurality of types of contents, and to mix and use the contents immediately before use. To provide a container.

The double container of the present invention
An inner layer having an upper opening and forming a storage space for the contents,
An outer layer body that accommodates the inner layer body and has a mouth portion, a body portion connected to the mouth portion, and a bottom portion that closes the body portion.
Equipped with
The outer layer body has a partition wall that divides the inside of the inner layer body into a plurality of accommodation spaces, and has an opening for introducing outside air between the outer layer body and the inner layer body.
A check valve is further provided to block the passage of air from the pouring hole for pouring the contents to the outside into the accommodation space and to allow the contents to pass from the accommodation space to the pouring hole.
The check valve is provided for each of the plurality of accommodation spaces, and is held in the holding cylinder formed between the accommodation space and the injection hole and in the holding cylinder so as to be movable in the vertical direction. It is characterized by having a ball valve.

In the double container of the present invention, in the above configuration, it is preferable that an adhesive layer for adhering the outer layer body and the inner layer body is formed on at least a part of the partition wall.

In the double container of the present invention, in the above configuration, the outer layer body introduces outside air into each of the accommodation spaces of the plurality of accommodation spaces and a part of the inner layer body forming each accommodation space. It is preferable to have an opening.

In the above configuration, the double container of the present invention preferably includes the pouring hole and further includes a pouring cap attached to the mouth of the outer layer.

In the double container of the present invention, in the above configuration, it is preferable that a mixing flow path for mixing the contents in the plurality of accommodation spaces is provided between the check valve and the injection hole. ..

In the double container of the present invention, it is preferable that the mixing flow path is a spiral flow path in the above configuration.

In the double container of the present invention, it is preferable that the opening is formed in the bottom of the outer layer in the above configuration.

According to the present invention, it is possible to provide a double container that can be used by separately accommodating a plurality of types of contents and mixing the contents immediately before use.

It is a front sectional view of the double container which is one Embodiment of this invention, and is the sectional view by the AA sectional view of FIG. FIG. 3 is an enlarged cross-sectional view of a main part of the double container shown in FIG. It is a top view of the double container shown in FIG. It is a bottom view of the double container shown in FIG.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

The double container 1 according to the embodiment of the present invention shown in FIG. 1 stores, for example, two types of liquid contents such as food seasonings, and contains a container body 2 and a pouring cap 3. Have. Note that FIG. 1 is a front sectional view of the double container 1 and is a sectional view taken along the line AA of FIG. 4 described later. Further, as shown in FIGS. 1 and 2, the container body 2 has a double structure having an inner layer 4 and an outer layer 5, and the pouring cap 3 is attached to a mouth portion 5a provided on the outer layer 5. It is installed.

In the present specification, claims, abstracts and drawings, the side where the mouth portion 5a is located is the upper side (upper side in FIG. 1), and the side where the bottom portion 5d, which will be described later, is located is the lower side (lower side in FIG. 1). ).

As shown in FIG. 2, for example, the inner layer 4 constituting the container body 2 is formed into a flexible bag body made of a thin synthetic resin, and the inside thereof is a storage space S1 or S2 for storing the contents. ing. The upper end of the inner layer 4 is an upper opening 4b connected to the accommodation spaces S1 and S2, and the contents accommodated in the accommodation spaces S1 and S2 can be poured out from the upper opening 4b.

The outer layer 5 forms the outer shell of the container body 2, and has the above-mentioned mouth portion 5a and a body portion 5b integrally connected to the mouth portion 5a. The outer layer 5 houses the inner layer 4 detachably inside the outer layer 5, and the upper opening 4b of the inner layer 4 is fixed to the opening end of the mouth portion 5a. Further, a protruding portion 5c projecting outward in the radial direction is integrally provided on the outer peripheral surface of the mouth portion 5a of the outer layer body 5.

In the present embodiment, as shown in FIG. 4, the container body 2 has a race track-shaped outer shape having a straight line portion and an arc-shaped portion in a plan view. A notch portion 5g that divides the race track shape into two in the longitudinal direction is formed, and a partition wall 5s is formed so as to surround the notch portion 5g from the inside in the radial direction. The notch 5g and the partition wall 5s are formed by a protrusion corresponding to the shape of the notch 5g, which protrudes horizontally from the split mold for extrusion blow molding.

In the partition wall 5s extending from the upper side and the lower side of FIG. 4 toward the center in the radial direction, the inner layer bodies 4 existing inside at the center position in the radial direction are in close contact with each other and integrated. This is because the inner layers 4 are made of the same material, so that the inner layers 4 are easily welded to each other when pressed from the vertical direction in FIG. 4 during extrusion blow molding. Further, as shown in FIG. 4, an adhesive layer 4s for adhering the outer layer body 5 and the inner layer body 4 is provided in the portion where the inner layer bodies 4 are welded to each other. In this way, the partition walls 5s extending from the upper and lower sides of FIG. 4 toward the center in the radial direction are completely connected by welding the inner layers 4 and adhering the outer layer 5 and the inner layer 4 by the adhesive layer 4s. Will be. In the container body 2 of the present embodiment, the inner space of the inner layer 4 is divided into two by the partition wall 5s, and a storage space S1 for accommodating the first agent and an accommodation space S2 for accommodating the second agent are formed.

In the present embodiment, the inner space of the inner layer 4 is configured to be divided into two accommodation spaces S1 and S2, but the present embodiment is not limited to this embodiment. The inner space of the inner layer 4 may be configured to be divided into three or more accommodation spaces.

In the present embodiment, the container body 2 forms a laminated peeling container by performing extrusion blow molding on a parison formed by laminating the synthetic resin material of the inner layer 4 and the synthetic resin material of the outer layer 5. There is. Ethylene-vinyl alcohol copolymer resin (EVOH) or nylon is used as the material of the inner layer 4 constituting the container body 2. Further, low density polyethylene (LDPE) or high density polyethylene resin (HDPE) is used as the material of the outer layer body 5, and particularly when LDPE is used, high squeeze property can be imparted. However, the present invention is not limited to this aspect, and when a laminated peeling container is formed by, for example, biaxial stretching blow molding, polypropylene (PP) is used as the material of the inner layer body 4, and polypropylene (PP) is used as the material of the outer layer body 5. Polyethylene terephthalate (PET) may be used. Further, as the material of the inner layer body 4 and the outer layer body 5, other resins having low compatibility with each other can be used. Further, the container body 2 may be a container in which the outer layer body 5 and the inner layer body 4 are individually formed and assembled instead of the laminated peeling container. In this case, for example, the outer layer 5 may be formed of glass, metal, or other material.

As shown in FIG. 1, a pinch-off portion 5e, which is a cut-off portion of the laminated parison, is provided on the bottom portion 5d of the container main body 2. In this pinch-off portion 5e, the cut-off portion of the inner layer body 4 is closed, but the cut-off portion of the outer layer body 5 is open, and the open cut-off portion of the outer layer body 5 is open as shown in FIG. It forms a hole 6. The opening 6 communicates between the inner layer 4 and the outer layer 5, and outside air can be introduced from the opening 6 between the inner layer 4 and the outer layer 5. Further, a pair of reinforcing ribs 15a extending along the extension line of the opening 6 are provided on the outside of both ends of the opening 6. The pair of reinforcing ribs 15a are formed by sandwiching the outer layer body 5 and the inner layer body 4 with a split die and fusing them while flatly crushing them.

In the present embodiment, individual openings 6a and 6b are provided for each of the accommodation spaces S1 and S2. That is, the opening 6a is provided to introduce outside air between the outer layer body 5 and a part of the inner layer body 4 forming the accommodation space S1. Similarly, the opening 6b is provided to introduce outside air between the outer layer body 5 and a part of the inner layer body 4 forming the accommodation space S2. However, the present invention is not limited to this aspect, and the outside air may be introduced into the space between the outer layer body 5 and the inner layer body 4 from a common opening in one place.

As shown in FIGS. 1 and 2, the pouring cap 3 includes an upper cap 3a including a pouring cylinder 9 forming the pouring hole 9a and a lower cap 3b including a holding cylinder 17 constituting the check valve 40. have. The upper cap 3a and the lower cap 3b may be integrally formed.

As shown in FIG. 2, the lower cap 3b is formed in a ridged cylinder shape including a race track-shaped mounting cylinder portion 7a and a partition wall 13 connected to the upper end of the mounting cylinder portion 7a. In the present embodiment, the outer layer 5 in the body 5b of the container body 2 is configured to have a race track shape in a plan view, and the same applies to the outer peripheral surface of the mouth 5a. An engaging protrusion 7b is integrally provided on the inner peripheral surface of the mounting cylinder portion 7a, and the engaging protrusion 7b undercuts and engages with the protruding portion 5c provided at the mouth portion 5a of the outer layer body 5. The cap 3b is attached to the mouth portion 5a of the outer layer body 5.

An outer fitting wall 13a that undercuts and engages with the outer peripheral wall 8a of the upper cap 3a, which will be described later, is formed on the upper surface of the partition wall 13 of the lower cap 3b. Further, on the lower surface of the partition wall 13, a cylindrical fitting portion 16 for sandwiching the inner layer body 4 with the inner peripheral surface of the mouth portion 5a formed for each of the accommodation spaces S1 and S2 is provided. A holding cylinder 17 constituting a check valve 40, which will be described later, is integrally formed with the lower cap 3b inside each fitting portion 16 in the radial direction. An inner fitting wall 14 that fits into the mixing member 30, which will be described later, is formed in the center of the upper surface of the partition wall 13.

As shown in FIG. 2, the upper cap 3a has a race track-shaped outer peripheral wall 8a and a top wall 8d connected to the upper end of the outer peripheral wall 8a. A pouring cylinder 9 forming a pouring hole 9a is integrally provided at the radial center position of the top wall 8d. The dispensing cylinder 9 projects in a trumpet shape from the upper surface of the top wall 8d and cylindrically protrudes from the lower surface of the top wall 8d and penetrates the top wall 8d. The pouring cylinder 9 communicates with the upper opening 4b of the inner layer body 4 through the pouring path 18 of the holding cylinder 17, and the contents contained in the inner layer body 4 can be poured out to the outside.

Further, an engaging protrusion wall 8b is formed on the inner peripheral surface of the outer peripheral wall 8a of the upper cap 3a. The upper cap 3a is fixed to the lower cap 3b by undercuting the engaging protrusion 8b with the protruding portion 13b formed on the outer fitting wall 13a of the lower cap 3b.

As shown in FIG. 2, a mixing member 30 is arranged in the injection hole 9a of the upper cap 3a. The mixing member 30 includes a spirally formed mixing flow path 30a and a base portion 30b for fixing the mixing flow path 30a to the inner fitting wall 14 of the lower cap 3b. The mixing flow path 30a is a spiral flow path that moves upward while rotating around the central axis of the injection hole 9a. The contents that have passed through the check valve 40 on the accommodation space S1 side and the contents that have passed through the check valve 40 on the accommodation space S2 side enter from the lower end of the mixing flow path 30a and move upward in the spiral flow path. It is mixed for the first time in the process of proceeding, and is poured out from the upper end of the pouring hole 9a.

An overcap 10 is provided on the upper cap 3a so as to be openable and closable via a hinge 11 (see FIGS. 2 and 3). The overcap 10 is formed in a ridged cylinder having substantially the same diameter as the upper cap 3a, and can be engaged with the upper cap 3a by means such as undercut to keep the pouring cap 3 in a closed state. A cylindrical plug body 10a is integrally projected on the inner surface of the overcap 10, and when the overcap 10 is closed, the plug body 10a is inserted into the pouring cylinder 9 and the pouring hole 9a is closed by the plug body 10a. It has become so. Reference numeral 10b in FIG. 3 is a picking piece for opening and closing the overcap 10.

As shown in FIGS. 2 and 3, a cylindrical holding cylinder 17 is integrally provided inside the fitting portion 16 in the partition wall 13 in the radial direction. In the present embodiment, a holding cylinder 17 having the same shape is formed in each of the accommodation spaces S1 and S2. The inside of the holding cylinder 17 is a pouring path 18 for communicating the upper opening 4b of the inner layer 4 and the pouring hole 9a of the upper cap 3a, and the contents accommodated in the accommodating spaces S1 and S2 of the inner layer 4. Can flow from the upper opening 4b through the pouring path 18 and further through the mixing flow path 30a to the pouring hole 9a. As shown in FIG. 2, four ribs 19 are integrally provided on the inner peripheral surface of the holding cylinder 17 so as to be spaced apart in the circumferential direction and extend along the axial direction of the holding cylinder 17. A protrusion 19a projecting inward in the radial direction of the holding cylinder 17 is integrally provided at the upper end of these ribs 19. If the ball valve 20 can be held in the pouring path 18, the protrusion 19a may not be provided. Further, the lower portion of the holding cylinder 17 is a conical inclined wall 17a whose diameter decreases toward the accommodation spaces S1 and S2, and the lower end of the inclined wall 17a opens toward the accommodation spaces S1 and S2. An inflow port 17b is provided.

A ball valve 20 formed in a spherical shape, for example, made of a steel material, a resin material, or the like is arranged inside the holding cylinder 17, that is, on the pouring path 18. The outer peripheral surface of the ball valve 20 is supported by four ribs 19, and the ball valve 20 is guided by the ribs 19 and is movable in the axial direction along the pouring path 18. Since the ball valve 20 is guided and moved by the rib 19 in this way, the ball valve 20 can be reliably moved in the ejection path 18 in the axial direction, and the contents are passed between the adjacent ribs 19. Can be efficiently poured out through the pouring path 18. The number of ribs 19 is not limited to four, and any number of ribs 19 can be provided.

As shown in FIG. 2, when the double container 1 stands upright with the pouring cap 3 on the upper side, the ball valve 20 moves downward in the pouring path 18 due to its own weight and reaches the inclined wall 17a serving as a valve seat. The pouring path 18 is closed by abutting over the entire circumference, and the accommodation spaces S1 and S2 and the pouring hole 9a are not communicated with each other. On the other hand, when positive pressure is generated in the accommodation spaces S1 and S2 by the pressing of the body portion 5b, or when the double container 1 is tilted by 90 degrees or more with respect to the standing posture, the ball valve 20 protrudes away from the inclined wall 17a. It is possible to move in the pouring path 18 to a position where it is held by 19a. As a result, the pouring path 18 is opened, and the accommodation spaces S1 and S2 and the pouring hole 9a are communicated with each other through the gap portion between the adjacent ribs 19 of the pouring path 18. As described above, the ball valve 20 has an open position in which the contents flow from the accommodation spaces S1 and S2 of the inner layer 4 toward the injection hole 9a of the injection cap 3 away from the inclined wall 17a which is the valve seat, and the valve. As a check valve 40 that abuts on the inclined wall 17a, which is a seat, moves from the pouring hole 9a to a closed position that blocks the flow of contents and outside air toward the accommodation spaces S1 and S2, and opens and closes the pouring path 18. Function.

Then, in the state where the check valve 40 is opened, the contents accommodated in the accommodation spaces S1 and S2 of the inner layer body 4 are brought into the pouring path 18 of the holding cylinder 17 and the mixing flow path from the upper opening 4b of the inner layer body 4. It can be poured out through the pouring hole 9a of the pouring cap 3 through 30a.

Further, the volume of the inner layer 4 is reduced by introducing outside air between the outer layer 5 and the inner layer 4 from the opening 6 provided in the bottom 5d of the outer layer 5 as the contents are poured out. Can be maintained in a state. As a result, it is possible to prevent the contents inside the inner layer 4 from being replaced with the outside air as the contents are poured out, and to avoid contact between the contents and the outside air as much as possible.

After pouring out the contents, when the double container 1 is returned to the original standing posture, the ball valve 20 moves away from the protrusion 19a to a position where it abuts on the inclined wall 17a. As a result, the injection path 18 is blocked by the ball valve 20.

At this time, as the ball valve 20 moves downward toward the inclined wall 17a, the contents near the tip of the pouring hole 9a are pulled toward the pouring path 18 side (sackback function), so that pouring is performed. It is possible to effectively prevent dripping from the tip of the hole 9a.

As described above, in the present embodiment, the outer layer 5 has a partition wall 5s that divides the inside of the inner layer 4 into a plurality of accommodation spaces S1 and S2, and is open to introduce outside air between the inner layer 4 and the inner layer 4. It was configured to have a hole 6. As a result, the two types of contents can be separately stored in the storage spaces S1 and S2, and the contents can be mixed and used immediately before use. Further, since the outside air is introduced into the space between the outer layer 5 and the inner layer 4 from the opening 6 by the amount of the contents poured out, it is possible to avoid contact between the contents and the outside air. Further, the contents can be evenly poured out from the two accommodation spaces S1 and S2 only by the volume integral obtained by squeezing the body portion 5b.

Further, in the present embodiment, the adhesive layer 4s for adhering the outer layer body 5 and the inner layer body 4 is formed on at least a part of the partition wall 5s. As a result, the inner layers 4 facing each other are integrated by welding, and the outer layer 5 and the inner layer 4 are adhered to each other. The space can be reliably divided into two by the partition wall 5s to form two accommodation spaces S1 and S2.

Further, in the present embodiment, the outer layer 5 has a plurality of openings 6a for introducing outside air between each of the accommodation spaces S1 and S2 and a part of the inner layer 4 forming each accommodation space. , 6b. As a result, the outside air can be introduced from the plurality of openings 6a and 6b, so that the outer layer body 5 can be quickly restored. Further, even if the amount of the contents used is different for each of the accommodation spaces S1 and S2, the outer layer 5 can be restored by supplying outside air according to the amount of the contents used from the openings 6a and 6b.

Further, in the present embodiment, the pouring hole 9a for pouring out the contents to the outside is provided, and the pouring cap 3 attached to the mouth portion 5a of the outer layer body 5 is further provided. As a result, the contents individually contained in the accommodation spaces S1 and S1 and 2 can be mixed at the time of pouring.

Further, in the present embodiment, the check valve 40 that blocks the passage of air from the injection holes 9a to the accommodation spaces S1 and S2 and allows the passage of the contents from the accommodation spaces S1 and S2 to the injection holes 9a. Was configured to further prepare. As a result, the introduction of outside air from the outside into the accommodation spaces S1 and S2 can be reliably suppressed, and contact between the contents and the outside air can be avoided as much as possible.

Further, in the present embodiment, a mixing flow path 30a for mixing the contents in the plurality of accommodation spaces S1 and S2 is provided between the check valve 40 and the injection hole 9a. As a result, different contents individually housed in the storage spaces S1 and S2 can be well mixed at the time of pouring and then pouring out.

Further, in the present embodiment, the mixing flow path 30a is configured as a spiral flow path. As a result, different contents individually contained in the accommodation spaces S1 and S2 can be further mixed and then discharged by passing through a spiral flow path at the time of pouring.

Further, in the present embodiment, the check valve 40 is configured to be provided for each of the plurality of accommodation spaces S1 and S2. As a result, the size of the inflow port 17b of the check valve 40 is changed according to the mixing ratio of the contents in each of the accommodation spaces S1 and S2, and the size and spacing of the ribs 19 are changed according to the viscosity of the contents and the like. It can be optimized so that the contents are poured out at a predetermined ratio. Further, by arranging the check valve 40 before the contents in the accommodation spaces S1 and S2 are mixed, it is possible to suppress the mixing of other contents in the accommodation spaces S1 and S2.

Further, in the present embodiment, the check valve 40 is a holding cylinder 17 formed between the accommodation spaces S1 and S2 and the ejection hole 9a, and a ball held in the holding cylinder 17 so as to be movable in the vertical direction. It was configured to have a valve 20. As a result, after pouring out the contents, the ball valve 20 moves to the closed position to draw in the contents near the pouring hole 9a and prevent the liquid from dripping from the pouring hole 9a, while pouring with the ball valve 20. The exit path 18 can be reliably blocked, and the inflow of outside air into the inner layer 4 can be reliably prevented. Further, since the check valve 40 is also opened by the weight of the ball valve 20, the ball valve 20 can be opened by simply tilting the double container 1 into the inverted posture without necessarily squeezing the body portion 5b of the outer layer body 5. The check valve 40 can be opened by moving it to the injection hole 9a side. Therefore, the outer layer 5 can be formed of glass, metal, or other material that is difficult to squeeze.

Further, in the present embodiment, since the opening 6 is configured to be formed in the bottom portion 5d of the outer layer body 5, it is a cut-off portion of the laminated parison without providing an outside air introduction hole or an outside air introduction valve in the injection cap 3. The opening 6 can be formed by using the pinch-off portion 5e of the bottom portion 5d.

Although the present invention has been described with reference to the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and modifications based on the present disclosure. Therefore, it should be noted that these modifications and modifications are included in the scope of the present invention. For example, the functions included in each component can be rearranged so as not to be logically inconsistent, and a plurality of components can be combined or divided into one. It should be understood that these are also included in the scope of the present invention.

For example, in the present embodiment, the outer shape of the container body 2 and the pouring cap 3 is configured to have a race track shape in a plan view, but the present invention is not limited to this embodiment. The outer shape of the container body 2 and the pouring cap 3 may have other shapes such as an ellipse and a rectangle in a plan view. Further, the shapes of the container body 2 and the pouring cap 3 do not necessarily have to be the same.

Further, in the present embodiment, the mixing flow path 30a is configured as a spiral flow path, but the present invention is not limited to this embodiment. The mixing flow path 30a may be configured such that the mesh is fixed to the end face of the ring, for example, so that the contents are mixed and foamed.

Further, in the present embodiment, the accommodation spaces S1 and S2 are configured to have a symmetrical shape having substantially the same volume as shown in FIG. 1, but the present invention is not limited to this embodiment. The volume ratio of the accommodation spaces S1 and S2 may be appropriately adjusted according to the mixing ratio of the contents accommodated in the accommodation spaces S1 and S2.

Further, in the present embodiment, the two check valves 40 provided in the respective accommodation spaces S1 and S2 are configured to have the same shape, but the present invention is not limited to this embodiment. The size of the inflow port 17b of the check valve 40 is changed according to the mixing ratio of the contents in each of the accommodation spaces S1 and S2, and the size and spacing of the ribs 19 are changed according to the viscosity of the contents. , Each check valve 40 may be individually optimized so that the contents are dispensed at a predetermined ratio.

Further, in the present embodiment, a spherical ball valve 20 is used, but the present embodiment is not limited to this embodiment. As long as it is movably housed inside the injection path 18 and has a shape that can open and close the injection path 18, even if a shape that is not a perfect sphere, for example, an oval shape (rugby ball shape) is used. good.

Further, in the present embodiment, the rib 19 is provided on the inner peripheral surface of the injection path 18, but the present invention is not limited to this embodiment. If a flow path is secured inside the pouring path 18 when the check valve 40 is opened, the rib 19 may not be provided on the inner peripheral surface of the pouring path 18. Further, instead of the rib 19, a groove extending along the axial direction may be provided on the inner peripheral surface of the injection path 18.

Further, the configuration of the check valve 40 is not limited to that having the ball valve 20, and other configurations such as those having a three-point valve may be adopted.

Further, in the present embodiment, the opening 6 is provided in the bottom portion 5d of the outer layer body 5, but the present invention is not limited to this, and if outside air can be introduced between the outer layer body 5 and the inner layer body 4, for example. It is also possible to provide holes 6 in other portions of the outer layer body 5, such as the body portion 5b and the mouth portion 5a of the outer layer body 5.

1 Double container 2 Container body 3 Injection cap 3a Upper cap 3b Lower cap 4 Inner layer 4b Upper opening 4s Adhesive layer 5 Outer layer 5a Mouth 5b Body 5c Protruding 5d Bottom 5e Pinch-off 5g Notch 5s Partition 6 , 6a, 6b Opening hole 7a Mounting cylinder 7b Engagement protrusion 8a Outer wall 8b Engagement protrusion 8d Top wall 9 Outlet cylinder 9a Outlet hole 10 Overcap 10a Plug 10b Picking piece 11 Hinge 13 Partition 13a Outer fitting Joint wall 13b Protruding part 14 Inner fitting wall 15a Reinforcing rib 16 Fitting part 17 Holding cylinder 17a Inclined wall 17b Inflow port 18 Outlet passage 19 Rib 19a Protrusion 20 Ball valve 30 Mixing member 30a Mixing flow path 30b Base part 40 Check valve S1, S2 accommodation space

Claims (7)

An inner layer having an upper opening and forming a storage space for the contents,
An outer layer body that accommodates the inner layer body and has a mouth portion, a body portion connected to the mouth portion, and a bottom portion that closes the body portion.
Equipped with
The outer layer body has a partition wall that divides the inside of the inner layer body into a plurality of accommodation spaces, and has an opening for introducing outside air between the outer layer body and the inner layer body.
A check valve is further provided to block the passage of air from the pouring hole for pouring the contents to the outside into the accommodation space and to allow the contents to pass from the accommodation space to the pouring hole.
The check valve is provided for each of the plurality of accommodation spaces, and is held in the holding cylinder formed between the accommodation space and the injection hole and in the holding cylinder so as to be movable in the vertical direction. A double container characterized by having a ball valve. The double container according to claim 1, wherein an adhesive layer for adhering the outer layer body and the inner layer body is formed on at least a part of the partition wall. The first or second aspect of the present invention, wherein the outer layer body has a plurality of openings for introducing outside air between the outer layer body and a part of the inner layer body forming the respective accommodation spaces in each accommodation space of the plurality of accommodation spaces. Double container. The double container according to any one of claims 1 to 3, further comprising a pouring cap provided with the pouring hole and attached to the mouth of the outer layer body. The double container according to claim 1, wherein a mixing flow path for mixing the contents in the plurality of accommodation spaces is provided between the check valve and the injection hole. The double container according to claim 5, wherein the mixing flow path is a spiral flow path. The double container according to any one of claims 1 to 6, wherein the opening is formed in the bottom portion of the outer layer body.

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