JP6839988B2 - Double container - Google Patents

Description

The present invention relates to a double container including a container body having an inner layer body for accommodating the contents and an outer layer body for accommodating the inner layer body, and a pouring cap attached to the container body.

In recent years, in a container in which a pouring cap is attached to a container body for accommodating contents, for example, as shown in Patent Document 1, a double container (derami container) in which the container body is composed of an inner layer body and an outer layer body. , Also called a laminated peeling container) is used. A flexible outer layer is used for this type of container, and the outer layer is provided with a vent for taking in air in an internal space located between the outer layer and the inner layer. Further, the pouring cap is provided with an air valve that prevents air in the internal space from leaking to the outside world, while allowing air to be introduced from the outside world into the internal space when the internal space is decompressed.

According to the double container having such a structure, the internal space is pressurized by pressing the outer layer body, whereby the pressure in the filling space is increased and the contents can be poured out. Further, if the pressure on the outer layer body is released, the internal space is depressurized with the restoration of the outer layer body, whereby air is introduced from the vent to the inner space, and only the inner layer body can be reduced in volume and deformed. That is, the independence of the container can be maintained even if the contents are reduced. Further, since the contents can be poured out without replacing with the outside air, there is an advantage that the quality of the contained contents is less likely to deteriorate. For this reason, this type of container is being widely used as a container suitable for containing, for example, seasonings such as soy sauce and sauce, and cosmetics such as shampoo, conditioner, liquid soap, and lotion.

Japanese Unexamined Patent Publication No. 2015-163520

By the way, in a general container, after the contents are used up, the injection cap is removed and replaced with a new container body (refill container) filled with the contents. Therefore, there is a desire to reuse such a refill container by reusing the injection cap even in the above-mentioned double container. However, when the pouring cap is attached to the container body, contact between the contents and the outside air is unavoidable, so that the quality may deteriorate depending on the contents. That is, since the above-mentioned advantages of the double container cannot be obtained, the use of the refill container has not yet progressed in the field of the double container.

An object of the present invention is to solve such a problem, and to provide a double container capable of avoiding contact between the contents and the outside air when the pouring cap is replaced with a new container body after the contents are used up. The purpose is to do.

The present invention comprises a container body having a volume-reducing deformable inner layer body for accommodating the contents, and an outer layer body having a mouth portion opened above and accommodating the inner layer body inside.
A double container having a spout for pouring out the contents of the inner layer and a spout cap attached to the mouth.
The container body has a sealing member that seals the mouth portion and keeps the inner layer body airtight when not in use.
The pouring cap comprises a tearing portion to open the the mouth portion broken away or removing the sealing member by mounting infusion out cap on the mouth, before the opening portion is opened the mouth part and It has a sealing portion that airtightly contacts the container body both after opening.
The dispensing cap has an inner side wall located radially inside the mouth and an annular outer wall located radially outside the mouth.
The opening portion is a sharp portion in which the end portion of the inner side wall is sharpened toward the sealing member, and the sealing portion is an inner circumference of the outer wall that airtightly contacts the outer peripheral surface of the mouth portion. It is a double container that is a surface.

The sealing member is preferably a sheet fixed to the upper end of the mouth.

Further, the present invention includes a container body having a volume-reducing deformable inner layer body for accommodating the contents, and an outer layer body having a mouth portion opened above and accommodating the inner layer body inside.
A double container having a spout for pouring out the contents of the inner layer and a spout cap attached to the mouth.
The container body has a sealing member that seals the mouth portion and keeps the inner layer body airtight when not in use.
The pouring cap includes an opening portion that breaks or removes the sealing member by attaching the pouring cap to the mouth portion to open the mouth portion, and before the opening portion opens the mouth portion. It has a sealing portion that airtightly contacts the container body, and has a sealing portion.
The pouring cap has an annular inner side wall located on the radial inside of the mouth portion and a tubular shape on the inside which is located on the radial inside of the inner side wall and has a moving valve that can be moved by its own weight. With a wall
The sealing member has a peripheral wall extending along the inner peripheral surface of the mouth portion, and a partition wall or a sheet connected to the peripheral wall to seal the mouth portion.
The opening portion is a sharp portion in which the end portion of the inner side wall is sharpened toward the sealing member, and the sharpened portion is located below the lower end portion of the tubular wall.
The sealing portion is hermetically to the inner peripheral surface of the peripheral wall is also the outer peripheral surface is double container abutting said inner side wall.

It is preferable that the sealing member has the peripheral wall and the partition wall, and also has a weakened portion provided on at least one of the peripheral wall and the partition wall.

In the double container of the present invention, the container body has a sealing member that seals the mouth portion and keeps the inner layer airtight when not in use, and the dispensing cap has a dispensing cap attached to the mouth portion. As a result, it has an opening portion that breaks or removes the sealing member to open the mouth portion, and a sealing portion that airtightly contacts the container body even before the opening portion opens the mouth portion. That is, when replacing the pouring cap with a new container body, contact between the contents and the outside air can be avoided as much as possible. Therefore, according to such a double container, even when a new container body is used as a refill container, it is possible to prevent quality deterioration of the contents due to contact with the outside air.

It is sectional drawing in the side view which shows one Embodiment of the double container which follows this invention. (A) is a diagram showing a state of the container body shown in FIG. 1 when not in use, and (b) is a diagram for explaining a situation in which a pouring cap is attached to the container body of (a). It is sectional drawing in the side view which shows the other embodiment of the double container according to this invention. (A) is a diagram showing a state of the container body shown in FIG. 3 when not in use, and (b) is a diagram for explaining a situation in which a pouring cap is attached to the container body of (a).

Hereinafter, an embodiment of a double container according to the present invention will be described with reference to the drawings. As shown in FIG. 1, "upper" and "lower" in the present specification and the like refer to the orientation in which the outer layer body (reference numeral 3) is located downward and the lid body (reference numeral 9) is located upward. Say.

The double container of the present embodiment is composed of a container body 1 (composed of an inner layer 2 and an outer layer 3), a pouring cap 4 (inner plug 5, a check valve 6, a moving valve 7, and a cap body 8). It is provided with a lid 9 and a lid 9.

The inner layer 2 is provided with a filling space S inside which the contents can be accommodated. The inner layer 2 of the present embodiment is made of a thin-walled synthetic resin and is provided so as to be deformable in volume reduction.

The outer layer body 3 includes a tubular mouth portion 3a extending along the central axis O. The mouth portion 3a of the present embodiment is composed of a mouth portion upper portion 3b having an upper opening and a mouth portion lower portion 3c having a diameter larger than that of the mouth portion upper portion 3b. Further, a male screw portion 3d is provided on the outer peripheral surface of the upper portion 3b of the mouth portion. Further, the upper portion 3b of the mouth portion is provided with a vent 3e that penetrates the upper portion 3b of the mouth portion in the radial direction. Then, at the lower end of the lower portion 3c of the mouth portion, a tubular body portion 3f extending downward along the central axis O after extending outward in the radial direction, and a bottom portion closing the lower end of the body portion 3f ( (Not shown) is provided. Further, the outer layer body 3 of the present embodiment is made of synthetic resin, and the body portion has flexibility.

Further, an internal space N leading to the vent 3e is formed between the inner layer 2 and the outer layer 3.

The inner layer body 2 and the outer layer body 3 in the present embodiment are formed by laminating synthetic resins having low compatibility with each other so as to be peelable. As the synthetic resin constituting the inner layer 2, a nylon resin (PA), an ethylene vinyl alcohol copolymer resin (EVOH), or a modified polyolefin resin (for example, “Admer” (registered trademark) manufactured by Mitsui Chemicals Co., Ltd.) shall be adopted. Can be done. Further, as the synthetic resin constituting the outer layer body 3, for example, polyethylene resin (PE) such as low density polyethylene (LDPE) and high density polyethylene resin (HDPE), as well as polypropylene (PP) can be adopted. Such an inner layer body 2 and an outer layer body 3 can be obtained by blow molding a parison in which a synthetic resin material forming the inner layer body 2 and a synthetic resin material forming the outer layer body 3 are laminated. In addition, a test tubular preform in which the synthetic resin material of the inner layer 2 and the synthetic resin material of the outer layer 3 are laminated is prepared, and this preform is formed by biaxially stretched blow molding, or the inner layer is formed. It is also possible to use a body in which the body and the outer layer are individually formed, and then the inner layer is arranged inside the outer layer. Further, although not shown, one or a plurality of adhesive bands extending in the vertical direction and partially joining the inner layer 2 and the outer layer 3 between the inner layer 2 and the outer layer 3. May be provided.

The inner plug 5 includes a top wall 5a located above the mouth portion 3a and closing the filling space S. A communication port 5b for contents that penetrates the top wall 5a is provided in the central portion of the top wall 5a. Further, on the side of the communication port 5b for contents, a tubular wall 5c is provided which has a cylindrical shape as a whole and whose lower part has a reduced diameter with respect to the upper part.

Further, on the lower surface of the top wall 5a, an inner side wall 5d located inside the upper portion 3b of the mouth portion in the radial direction is provided. The inner wall surface 5d of the present embodiment has an annular shape. Further, the inner wall surface 5d sandwiches the inner layer body 2 with the upper portion 3b of the mouth portion and abuts the inner layer body 2 in an airtight and liquid-tight manner. Further, the lower end of the inner side wall 5d is inclined with respect to the horizontal direction, and the lowermost end is a sharp pointed portion 5e.

An annular recess 5f is provided on the upper surface of the top wall 5a. Further, on the radial outer side of the recess 5f, an outer edge wall 5g extending upward from the outer edge of the top wall 5a is provided. Further, the connecting portion between the top wall 5a and the outer edge wall 5g is provided with an air communication port 5h penetrating them. The inner plug 5 of the present embodiment is made of a synthetic resin such as polypropylene (PP).

The check valve 6 is made of a soft material such as rubber or elastomer, and has a function as an air valve for regulating the flow of air and a function as an injection valve for regulating the flow of contents. Have.

The air valve in the check valve 6 is composed of an annular base portion 6a whose lower end is supported by a recess 5f and a thin-walled portion 6b which has an elastically deformable donut plate shape and whose inner edge portion is integrally connected to the base portion 6a. It is configured.

The check valve 6 is located above the content communication port 5b and the tubular wall 5c, and sits on the top wall 5a to close the content communication port 5b, while the tubular wall 5c. A part of the above is composed of a plate-shaped dispense valve main body 6c that is left open, and a connecting piece 6d that elastically connects the dispense valve main body 6c and the base portion 6a.

The moving valve 7 is arranged in the tubular wall 5c, and is provided so as to move along the inner peripheral surface of the tubular wall 5c in response to a change in the posture of the container body 1. As shown in FIG. 1, the moving valve 7 sits on the reduced diameter lower part of the tubular wall 5c when the container body 1 is in the upright posture, and does not communicate between the tubular wall 5c and the filling space S. It is in a state. As the moving valve 7, various shapes can be adopted according to the inner peripheral surface of the tubular wall 5c, but in the present embodiment, a spherical one is used.

The cap body 8 of the present embodiment is made of synthetic resin and is connected to the top wall 8a located above the check valve 6 and the lower surface of the top wall 8a and is located radially outside the upper portion 3b of the mouth. The outer side wall 8b and the outer peripheral wall 8c extending from the outer edge portion of the top wall 8a toward the upper end portion of the body portion 3f are provided. Here, on the inner peripheral surface of the outer wall 8b, a female threaded portion 8d corresponding to the male threaded portion 3d is provided. Further, the inner peripheral surface of the outer wall 8b below the female screw portion 8d is in airtightly in contact with the outer peripheral surface of the lower portion 3c of the mouth portion.

At the central portion of the top wall 8a, a pouring cylinder 8f is provided which extends upward from the edge of the hole penetrating the top wall 8a and whose upper opening is the pouring port 8e of the contents. Further, on the lower surface of the top wall 8a, a recess 8g for supporting the upper end portion of the base portion 6a and a step portion 8h for which the outer edge portion of the thin wall portion 6b abuts are provided.

Further, the top wall 8a is provided with an outside air introduction port 8j penetrating the front and back surfaces thereof. Here, between the outside air introduction port 8j and the ventilation port 3e, a communication passage is provided via a spiral gap formed between the male thread portion 3d and the female thread portion 8d from the air communication port 5h. There is. At the position where the ventilation port 3e is provided, a notch for cutting out the male screw portion 3d in the vertical direction may be provided, and the outside air introduction port 8j and the ventilation port 3e may be communicated with each other through this notch.

The lid 9 includes a top wall 9a located above the top wall 8a and a lid outer peripheral wall 9b integrally connected to the top wall 9a. On the lower surface of the top wall 9a, a seal cylinder 9c that is inserted inside the dispensing cylinder 8f and that is in airtight contact with the inner surface of the dispensing cylinder 8f is provided. Further, on the outer peripheral surface of the outer peripheral wall 9b of the lid, a hinge portion 9d that is integrally connected to the outer peripheral wall 8c of the cap body 8 is provided. Although the lid 9 of the present embodiment is integrally connected to the cap body 8, it may be provided separately from the cap body 8 and detachably attached to the cap body 8 by screws or undercuts. Good.

In the double container having such a configuration, the internal space N is pressurized by pressing the body portion of the outer layer body 3, and the pressure of the filling space S is increased by this, so that the contents of the filling space S are While raising the pouring valve main body 6c, it flows from the content communication port 5b through the gap around the connecting piece 6d to the inside of the base 6a, and is poured out from the pouring port 8e through the inside of the pouring cylinder 8f. Is done. Here, since the connecting passage connecting the ventilation port 3e and the outside air introduction port 8j is closed with the outer edge portion of the thin wall portion 6b abutting on the step portion 8h, the air in the internal space N does not leak to the outside world. Absent. The moving valve 7 in the tubular wall 5c depends on its own weight or the contents flowing in from the opening on the lower side of the tubular wall 5c in a state where the container body 1 is displaced to the tilted posture so that the contents can be discharged. , It has moved to the 6c side of the discharge valve body.

After that, when the pressure on the outer layer body 3 is released, the pressure in the filling space S returns to the original state and the discharge valve main body 6c sits on the upper surface of the top wall 5a. It is possible to prevent the inflow of outside air into S. Further, by displacing the container body 1 to the original upright posture, the moving valve 7 moves downward due to its own weight or a pressure drop in the filling space S. As a result, a space corresponding to the movement of the moving valve 7 is formed on the upper inside of the tubular wall 5c. It can be pulled back in (suckback function) and effectively prevent dripping. Since the moving valve 7 that has moved downward is seated on the reduced diameter lower portion of the tubular wall 5c, it is possible to prevent the inflow of outside air from the tubular wall 5c into the filling space S. Then, when the internal space N is decompressed with the restoration of the outer layer body 3, the outside air is taken in from the outside air introduction port 8j, and the outside air is introduced from the ventilation port 3e to the internal space N through the communication passage. As a result, the outer layer 3 can be restored while the inner layer 2 is reduced in volume and deformed.

By the way, after the contents are used up, the pouring cap 4 can be removed from the container body 1 and the pouring cap 4 can be replaced with a new container body 1 filled with the contents. Here, the new container body 1 is provided with a sealing member 10 that seals the mouth portion 3a and keeps the inner layer body 2 airtight when not in use. As shown in FIG. 2A, the seal member 10 of the present embodiment is a thin sheet fixed to the upper end portion of the upper portion 3b of the mouth portion (hereinafter, the seal member 10 is referred to as a sheet 10). Further, in the present embodiment, in order to prevent the sheet 10 from being inadvertently damaged during distribution or the like, a cap 11 screwed to the male screw portion 3d is provided.

When attaching the pouring cap 4 to such a new container body 1, the pouring cap 4 is rotated with respect to the container body 1 and the female screw portion 8d is screwed into the male screw portion 3d. Here, as shown in FIG. 2B, immediately before the sharp portion 5e abuts against the sheet 10, the inner peripheral surface of the outer wall 8b is in airtight contact with the outer peripheral surface of the lower portion 3c of the mouth portion. That is, in this state, since the mouth portion 3a of the container body 1 is shielded from the outside world by the outer wall 8b, even if the female screw portion 8d is screwed into the male screw portion 3d to the end and the sheet 10 is broken by the sharp portion 5e. , It is possible to avoid contact between the contents of the inner layer 2 and the outside air.

The inner side wall 5d in the present embodiment has a function of breaking the sheet 10 to open the mouth portion 3a and a function of preventing the contents from leaking when the outer layer body 3 is displaced to the tilted posture. To prepare. Therefore, the inner wall surface 5d in the present embodiment is formed in an annular shape and is configured to sandwich the inner layer body 2 with the upper portion 3b of the mouth portion. For example, such contents may leak out. When the function of preventing is substituted by another, it is not necessary to form the inner side wall 5d in an annular shape, and a gap may be provided between the inner side wall 5d and the inner layer body 2. Further, a plate-shaped member having a weakened portion is adopted instead of the sheet 10, and when the injection cap 4 is replaced, the weakened portion is broken by the inner side wall 5d and the mouth portion 3a is opened. You may.

Next, another embodiment of the double container according to the present invention will be described with reference to FIGS. 3 and 4. Parts having the same shape and function as those of the above-described embodiment and parts having different shapes but the same functions are designated by the same reference numerals in the drawings and detailed description thereof will be omitted.

As shown in FIGS. 3 and 4A, the container body 1 in the double container of the present embodiment is provided with a claw-shaped engaging portion 3g at the upper end portion of the upper mouth portion 3b of the outer layer body 3. There is. Further, a sealing member 12 is provided in place of the above-mentioned sheet 10.

The sealing member 12 is made of synthetic resin, and as shown in FIG. 4A, the peripheral wall 12a extending along the inner peripheral surface of the upper portion 3b of the mouth portion and the peripheral wall 12a connected to the peripheral wall 12a are connected to the mouth portion 3a. A partition wall 12b for sealing is provided. Further, the partition wall 12b is provided with a weakened portion 12c having a reduced thickness. An engaged portion 12d corresponding to the engaging portion 3g is provided at the upper end portion of the peripheral wall 12a.

The inner side wall 5d in the above-described embodiment is airtight and liquidtight to the inner layer 2 with the inner layer 2 sandwiched between the inner side wall 5d and the upper portion 3b of the mouth in a state where the injection cap 4 is attached to the container body 1. Although the inner side wall 5d of the present embodiment is in contact with the inner peripheral surface of the peripheral wall 12a as shown in FIG. 3, the inner side wall 5d is in contact with the inner peripheral surface of the peripheral wall 12a in an airtight and liquidtight manner.

In such a double container of the present embodiment, the injection cap 4 is rotated with respect to the new container body 1 shown in FIG. 4 (a) as shown in FIG. 4 (b), and the male screw portion 3d is screwed. When the portion 3d is screwed in, the inner side wall 5d is in airtight contact with the inner peripheral surface of the peripheral wall 12a just before the sharp portion 5e is pressed against the partition wall 12b. That is, in this state, since the mouth portion 3a of the container body 1 is blocked from the outside world by the peripheral wall 12a and the partition wall 12b, the male screw portion 3d is screwed into the male screw portion 3d to the end, and the weakened portion 12c is broken by the sharp portion 5e. Even if it is allowed to do so, contact between the contents of the inner layer 2 and the outside air can be avoided.

The seal member 12 in the present embodiment includes a weakening portion 12c on the partition wall 12b, but the weakening portion 12c may be provided on the peripheral wall 12a. Further, although the seal member 12 is one in which the partition wall 12b is integrally connected to the peripheral wall 12a, a sheet may be fixed to the lower end portion of the peripheral wall 12a instead of the partition wall 12b.

The double container according to the present invention is not limited to the embodiments described above, but includes various modifications within the scope of the claims. For example, the sealing member that seals the mouth portion is broken by the sharp portion in the embodiments described so far, but is removed from the mouth portion by attaching the injection cap. May be good. As such, for example, by omitting the engaged portion 12d from the seal member 12 shown in FIG. 3 and attaching the injection cap 4, the inner side wall 5d pushes the partition wall 12b and the seal member 12 opens. It may be configured to fall off from the part 3a. In this case, it is not necessary to provide the sharp portion 5e on the inner side wall 5d, and the lower end portion of the inner side wall 5d may extend in the horizontal direction. Further, the weakened portion 12c may be omitted.

1: Container body 2: Inner layer 3: Outer layer 3a: Mouth 3b: Mouth upper part 3c: Mouth lower part 3d: Male thread 3e: Vent 3f: Body 3g: Engagement part 4: Dispensing cap 5 : Inner plug 5a: Top wall 5b: Content communication port 5c: Cylindrical wall 5d: Inner side wall 5e: Sharp portion 5f: Recessed portion 5g: Outer edge wall 5h: Air communication port 6: Check valve 6a: Base 6b: Thin-walled part 6c: Outlet valve body 6d: Connecting piece 7: Moving valve 8: Cap body 8a: Top wall 8b: Outer wall 8c: Outer wall 8d: Female threaded part 8e: Outlet 8f: Outlet cylinder 8g: Recess 8h: Step 8j: Outside air inlet 9: Lid 9a: Top wall 9b: Lid outer wall 9c: Seal cylinder 9d: Hinge 10: Seal member (sheet)
11: Cap 12: Seal member 12a: Peripheral wall 12b: Partition wall 12c: Weakened portion 12d: Engagement portion N: Internal space O: Central axis S: Filling space

Claims (4)

A container body having a volume-reducing deformable inner layer body for accommodating the contents, and an outer layer body having a mouth portion opened above and accommodating the inner layer body inside.
A double container having a spout for pouring out the contents of the inner layer and a spout cap attached to the mouth.
The container body has a sealing member that seals the mouth portion and keeps the inner layer body airtight when not in use.
The pouring cap comprises a tearing portion to open the the mouth portion broken away or removing the sealing member by mounting infusion out cap on the mouth, before the opening portion is opened the mouth part and It has a sealing portion that airtightly contacts the container body both after opening.
The dispensing cap has an inner side wall located radially inside the mouth and an annular outer wall located radially outside the mouth.
The opening portion is a sharp portion in which the end portion of the inner side wall is sharpened toward the sealing member, and the sealing portion is an inner circumference of the outer wall that airtightly contacts the outer peripheral surface of the mouth portion. Double container that is a face. The double container according to claim 1 , wherein the sealing member is a sheet fixed to the upper end of the mouth portion. A container body having a volume-reducing deformable inner layer body for accommodating the contents, and an outer layer body having a mouth portion opened above and accommodating the inner layer body inside.
A double container having a spout for pouring out the contents of the inner layer and a spout cap attached to the mouth.
The container body has a sealing member that seals the mouth portion and keeps the inner layer body airtight when not in use.
The pouring cap includes an opening portion that breaks or removes the sealing member by attaching the pouring cap to the mouth portion to open the mouth portion, and before the opening portion opens the mouth portion. It has a sealing portion that airtightly contacts the container body, and has a sealing portion.
The pouring cap has an annular inner side wall located on the radial inside of the mouth portion and a tubular shape on the inside which is located on the radial inside of the inner side wall and has a moving valve that can be moved by its own weight. With a wall
The sealing member has a peripheral wall extending along the inner peripheral surface of the mouth portion, and a partition wall or a sheet connected to the peripheral wall to seal the mouth portion.
The opening portion is a sharp portion in which the end portion of the inner side wall is sharpened toward the sealing member, and the sharpened portion is located below the lower end portion of the tubular wall.
The sealing portion is a peripheral surface which is double container of the inner peripheral surface inner side wall abuts sealingly of the peripheral wall. The double container according to claim 3 , wherein the sealing member has the peripheral wall and the partition wall, and also has a weakened portion provided on at least one of the peripheral wall and the partition wall.

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