JP6704651B2 - Double container - Google Patents

Description

TECHNICAL FIELD The present invention relates to a double container provided with an inner layer body that can be deformed by volume reduction and an outer layer body in which the inner layer body is arranged.

As a container for storing cosmetics such as lotion, shampoo, rinse or liquid soap, and food seasoning, an inner layer body that accommodates such contents and is provided so as to be deformable in volume, and the inner layer body There is known a double container including an inner layer and an outer layer body that forms an outer shell of the container. The double container includes a delamination container (lamination peeling container) formed by stacking an outer layer body and an inner layer body from the beginning, and a container of a type in which the outer layer body and the inner layer body are individually formed and assembled. In addition, the delamination container includes an EBM (Extrusion Blow Molding) in which a laminated parison that has been melted by heating is sandwiched between molds and air is blown into the laminated parison to form a laminated container, and an outer layer and an inner layer. There is a biaxial stretch blow molding in which a laminated container is formed from a preform (container material) formed in a bottomed cylindrical shape. In such a double container, a cap for a double container is usually provided with a pouring tube for pouring out the contents at the mouth of the outer layer body and a check valve for preventing the outside air from entering the inner layer body. Is installed. Then, by pressing the outer layer body, the inner layer body is pressurized through the air between the outer layer body and the inner layer body, whereby the valve body of the check valve is opened and the contents are poured out. Further, the outer layer body is provided with a through hole for taking in outside air between the inner layer body, and when the outer layer body is restored to its original shape after pouring, the outside air is taken in through the through hole, and the inner layer body is Only the outer layer is restored with the volume reduced and deformed.

By the way, in the above-mentioned double container, when the outside air is introduced from the outside air introduction hole provided in the cap, an outside air introduction valve having a thin annular valve body as in Patent Document 1, for example, is provided in the flow path. It is used. When the outer layer body is pressed to increase the pressure inside the inner layer body to discharge the contents, the valve body of the outside air introduction valve is brought into contact with the inner surface of the pouring plug to maintain the closed state, and air passes through. I can't. Further, when the outer layer body returns to its original shape after the contents are poured out, the pressure in the space between the outer layer body and the inner layer body is reduced to a negative pressure, and the outside air introduction valve is opened. Thereby, air is introduced into the space between the outer layer body and the inner layer body from the outside air introduction hole, and the outer layer body can be restored to the original shape while the inner layer body maintains the volume reduction deformation.

JP, 2013-151316, A

However, in the above-mentioned double container, since it is necessary to newly incorporate a member having the function of the outside air introduction valve into the cap or to attach it to the container body, the number of parts tends to increase and the structure of parts tends to be complicated. ..

An object of the present invention is to solve such a problem, and an object thereof is to propose a double container having a function of an outside air introduction valve with a simple structure.

The present invention is a double container comprising an inner layer body for storing contents and a squeezable outer layer body for storing the inner layer body,
A cap body that has a pouring hole for pouring out the contents from the inner layer body, and is attached to the mouth portion of the outer layer body,
It is located between the pouring hole and the inner layer body, and blocks communication between the pouring hole and the inner layer body, while the squeeze of the outer layer body increases pressure in the inner layer body and A check valve that communicates with the inner layer,
A shrink film that covers at least a part of the outer layer body and the cap body from the outside,
The shrink film has an overlapping area where the films are overlapped, and the overlapping area can be separated from the adhesion area where the overlapped films are adhered to each other and the overlapped film is not adhered in the thickness direction. With a non-adhesive area,
Outside air is introduced into the space between the outer layer body and the inner layer body through both the space between the stacked films in the non-adhesive region and the outside air introduction hole provided in the outer layer body ,
At least a part of the outer layer body and the cap body is covered by the shrink film so as to overlap in the circumferential direction, thereby forming the overlapping region extending in the vertical direction,
The outside air introduction hole is arranged at the mouth of the outer layer body, the shrink film covers from the outside so as to bridge the gap between the lower end of the cap body and the outer layer body, and at least a part of the non-adhesive region is A double container provided in a region bridging the gap .

Further, it is preferable that the outside air introducing hole communicates with the outside only through the space between the stacked films in the non-adhesion region.

Further, the present invention is a double container comprising an inner layer body for containing the contents and a squeezable outer layer body for containing the inner layer body,
A cap body that has a pouring hole for pouring out the contents from the inner layer body, and is attached to the mouth portion of the outer layer body,
It is located between the pouring hole and the inner layer body, and blocks communication between the pouring hole and the inner layer body, while the squeeze of the outer layer body increases pressure in the inner layer body and A check valve that communicates with the inner layer,
A shrink film that covers at least a part of the outer layer body and the cap body from the outside.
Equipped with
The shrink film has an overlapping area where the films are overlapped, and the overlapping area can be separated from the adhesion area where the overlapped films are adhered to each other and the overlapped film is not adhered in the thickness direction. With a non-adhesive area,
Outside air is introduced into the space between the outer layer body and the inner layer body through both the space between the stacked films in the non-adhesive region and the outside air introduction hole provided in the outer layer body,
The outside air introduction hole is arranged in the expanded diameter portion or the body portion of the outer layer body, a recess is provided around the outside air introduction hole in the outer peripheral surface of the outer layer body,
Further comprising a connecting film that connects both ends in the circumferential direction of the shrink film covering at least a part of the outer layer body and the cap body from the circumferential direction from the inner circumferential side,
The overlapping portion of the shrink film and the connecting film forms the overlapping region,
At least a part of the non-bonding region is provided in a region overlapping with the outside air introduction hole or the recess, which is a double container.

The shrink film has a film removing perforation extending downward from the upper end, and a plurality of stopper perforations extending in the vertical direction and extending in the circumferential direction, and the film removing perforation at the lower end. It is preferable that only the uppermost stopper perforation among the plurality of stopper perforations is connected, and the plurality of stopper perforations are arranged above the non-bonding region.

Further, the present invention is a double container comprising an inner layer body for containing the contents and a squeezable outer layer body for containing the inner layer body,
A cap body that has a pouring hole for pouring out the contents from the inner layer body, and is attached to the mouth portion of the outer layer body,
It is located between the pouring hole and the inner layer body, and blocks communication between the pouring hole and the inner layer body, while the squeeze of the outer layer body increases pressure in the inner layer body and A check valve that communicates with the inner layer,
A shrink film that covers at least a part of the outer layer body and the cap body from the outside.
Equipped with
The shrink film has an overlapping area where the films are overlapped, and the overlapping area can be separated from the adhesion area where the overlapped films are adhered to each other and the overlapped film is not adhered in the thickness direction. With a non-adhesive area,
Outside air is introduced into the space between the outer layer body and the inner layer body through both the space between the stacked films in the non-adhesive region and the outside air introduction hole provided in the outer layer body,
A circumferential groove extending in the circumferential direction is provided on the outer peripheral wall of the cap body, and the shrink film has a film removing perforation extending downward from the upper end and a stopper perforation extending in the circumferential direction. the film removal perforations connected to the perforations for the stopper at the lower end, perforations for the stopper, it is disposed higher than the disposed in a region overlapping with the circumferential groove and the non-adhesive area Is a double container.

Further, the present invention is a double container comprising an inner layer body for containing the contents and a squeezable outer layer body for containing the inner layer body,
A cap body that has a pouring hole for pouring out the contents from the inner layer body, and is attached to the mouth portion of the outer layer body,
It is located between the pouring hole and the inner layer body, and blocks communication between the pouring hole and the inner layer body, while the squeeze of the outer layer body increases pressure in the inner layer body and A check valve that communicates with the inner layer,
A shrink film that covers at least a part of the outer layer body and the cap body from the outside.
Equipped with
The shrink film has an overlapping area where the films are overlapped, and the overlapping area can be separated from the adhesion area where the overlapped films are adhered to each other and the overlapped film is not adhered in the thickness direction. With a non-adhesive area,
Outside air is introduced into the space between the outer layer body and the inner layer body through both the space between the stacked films in the non-adhesive region and the outside air introduction hole provided in the outer layer body,
Before SL shrink film is a film removing perforation extending downward from the upper end, and a stopper perforation extending in the circumferential direction, is disposed adjacent the lower perforations for the stopper to adhesively fixed to the cap body and a bonded area of said film removal perforation is connected to the perforation stopper at the lower end, perforations for the stopper, characterized in that it is arranged above the non-adhesive area It is a double container.

Moreover, it is preferable that the perforation for film removal extends spirally downward from the upper end.

According to the double container of the present invention, it is possible to have the function of the outside air introduction valve with a simple configuration.

(A) is a front partial cross-sectional view showing the double container according to the first embodiment of the present invention, (b) is a view taken along the arrow A of (a), and (c) is. 3A is a cross-sectional view taken along the line BB in FIG. It is a figure which shows the structural example of the shrink film which covers a cap main body. It is a figure which shows the structural example of the shrink film which covers a cap main body. It is a figure which shows the structural example of the shrink film which covers a cap main body. It is a figure which shows the structural example of the shrink film which covers a cap main body. (A) is a front view which shows the double container which concerns on 2nd Embodiment of this invention, (b) is sectional drawing which follows CC cross section in (a). It is an enlarged front view of a through-hole (outside air introduction hole) portion of a double container concerning a 3rd embodiment of the present invention. (A) is an enlarged front view of a through-hole (outside air introduction hole) portion of a double container according to a fourth embodiment of the present invention, and (b) is a plan sectional view of a shrink film portion in (a). is there.

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

FIG. 1A is a partial front sectional view showing the configuration of the double container 100 according to the first embodiment of the present invention. The double container 100 includes a double container body 2, a cap body 10, an inner plug 20, a lid 50, and a shrink film 60. The double container body 2 is composed of an inner layer body 3 and an outer layer body 4. In the present specification, claims, abstract, and drawings, the side on which a lid 50 described later is located is the upper side (the upper side in FIG. 1A), and the side on which the bottom of the double container body 2 is located. Is the lower side (lower side in FIG. 1A).

First, the double container body 2 will be described. In the present embodiment, the double container main body 2 is a laminated peeling container by performing extrusion blow molding on a parison formed by laminating the synthetic resin material of the inner layer body 3 and the synthetic resin material of the outer layer body 4. Shaping. Further, ethylene-vinyl alcohol copolymer resin (EVOH) or nylon is used as the material of the inner layer body 3 which constitutes the double container body 2. When EVOH is used for the inner layer body 3, the inner layer body 3 may be formed by further laminating a modified polyolefin resin such as polyethylene resin or Admer (registered trademark) inside the EVOH. Further, as the material of the outer layer body 4, low density polyethylene (LDPE) or high density polyethylene resin (HDPE) is used, and particularly when LDPE is used, high squeeze property can be imparted. However, the present invention is not limited to this mode. For example, when a laminated release container is formed by performing biaxial stretch blow molding, polypropylene (PP) is used as the material of the inner layer body 3 and the material of the outer layer body 4 is used as the material of the outer layer body 4. Polyethylene terephthalate (PET) may be used. Further, as the material of the inner layer body 3 and the outer layer body 4, other resins having low mutual compatibility can be used. Further, the double container main body 2 may be one in which the outer layer body 4 and the inner layer body 3 are individually formed and assembled instead of the laminated release container. Although not shown, one or a plurality of adhesive strips that extend in the up-down direction and partially join the inner layer body 3 and the outer layer body 4 are provided between the inner layer body 3 and the outer layer body 4. May be provided.

The inner layer body 3 is formed so as to be deformable in volume, and in the present embodiment, it is obtained by peeling the double container body 2 formed in a laminated state from the outer layer body 4. .. The inner layer body 3 includes an accommodation space S for accommodating contents therein, and an upper opening 3 a connected to the accommodation space S.

The outer layer body 4 has a cylindrical peripheral wall 4a (portion), a diameter-increasing portion which is continuous with the peripheral wall 4a and expands downward, and a cylindrical shape which is continuous with the diameter-increasing portion. A flexible body portion and a bottom portion that closes the lower end of the body portion are connected. A male screw portion 4b is provided on the outer peripheral surface of the mouth peripheral wall 4a. Further, the mouth peripheral wall 4a is provided with a through hole 4c for taking in air between the inner layer body 3 and the outer peripheral surface provided with the through hole 4c is further provided with a male screw portion 4b in the vertical direction. A notch groove portion 4d is provided.

Next, the cap body 10 that constitutes the double container 100 will be described. The cap main body 10 includes an outer peripheral wall 11 that surrounds the mouth peripheral wall 4a, and an inner peripheral surface of the outer peripheral wall 11 is formed with a female screw portion 12 corresponding to the male screw portion 4b of the mouth peripheral wall 4a. A top wall (not shown) is integrally connected to the upper portion of the outer peripheral wall 11. A pouring barrel is provided on the upper surface of the top wall, and a pouring hole for pouring out the contents is formed on the inner peripheral surface of the pouring barrel.

A lower end portion 11b of the outer peripheral wall 11 of the cap body 10 forms a gap G between the enlarged diameter portion of the double container body 2 as shown in FIG. As will be described later, the double container 100 has a space between the outer layer body 4 and the inner layer body 3 from the outside through the non-adhesive region 61a formed in the shrink film 60, the gap G, and the through hole 4c. Outside air can be introduced. In the present embodiment, the outer peripheral wall 11 is configured to cover only a part of the outer peripheral side of the mouth peripheral wall 4a, but the present invention is not limited to this aspect. The lower end 11b may extend to the vicinity of the expanded diameter portion of the outer layer body 4 so that the outer peripheral wall 11 covers the entire mouth peripheral wall 4a.

An inner plug 20 is provided on the inner peripheral side of the cap body 10. The inner plug 20 is located between the pouring hole and the inner layer body 3, and a check valve (not shown) is provided in the center thereof. When the pressure in the inner layer body 3 increases due to the squeeze of the outer layer body 4, the valve body of the check valve is lifted upward in FIG. 1(a) by the pressure and is separated from the valve seat, and the check valve is opened. Become. When the squeeze of the outer layer body 4 is released, the valve body comes into contact with the valve seat again due to the weight of the valve body and the elastic force of the check valve arm that supports the valve body, and the check valve is closed. An annular seal wall 26 that sandwiches the inner layer body 3 with the outer layer body 4 is provided on the lower surface of the inner plug 20.

As shown in FIG. 1A, the lid body 50 is connected to the outer peripheral wall 11 of the cap body 10 via a hinge 51, and by bending at the hinge 51, the pouring hole can be covered. More specifically, the lid 50 includes a flat plate-shaped upper wall 52 and a lid peripheral wall 53 that is connected to the edge of the upper wall 52 and is continuous with the outer peripheral wall 11. A grip portion 58 protruding in the outer circumferential direction is provided at the upper end of the lid peripheral wall 53 on the side opposite to the hinge 51 on the circumference. The user grips the grip portion 58 and holds the lid 50. It can be lifted up and open, or pushed down to close. The lid body 50 may be a separate body from the cap body 10 without the hinge 51, and may be attached to the cap body 10 with a screw or an undercut.

The shrink film 60 is formed of a heat-shrinkable plastic film, and is wrapped around the outer layer body 4 and heated so that the outer film body 4 is brought into close contact with the outer layer body 4. The shrink film 60 is used for the purpose of protecting the double container body 2 from dirt and scratches, maintaining strength and shape, and the shrink film 60 itself is printed with a trademark or a design that draws attention to and impresses consumers. By doing so, the market value of the product can be improved. Further, as shown in FIG. 2, by covering the lid 50 of the double container 100 with the shrink film 60 in an unused state, it is possible to have a virgin seal function (unopened guarantee function).

In the present embodiment, the shrink film 60 covers a part of the cap body 10 and a part of the expanded diameter portion, the body portion, and the bottom portion of the outer layer body 4. The shrink film 60 covers the gap G between the lower end portion 11b of the outer peripheral wall 11 and the expanded diameter portion of the double container body 2 described above.

The shrink film 60 covers the outer layer body 4 and a part of the cap body 10 from the outside in the circumferential direction. The shrink film 60 is adhered in such a manner that both ends in the circumferential direction overlap each other, and the overlapped portion forms an overlapping area 61 shown in FIG. 1B. As shown in FIG. 1B, the overlapping region 61 has a bonding region 61b (indicated by diagonal lines in FIG. 1B) in which overlapping portions are bonded to each other, and an overlapping portion is bonded to each other. And a non-bonding region 61a that can be separated in the thickness direction. That is, in the adhesion region 61b of FIG. 1B, since the overlapping portions are adhered to each other, air does not leak to the outside through this portion. On the other hand, in the non-adhesion region 61a, since the overlapping portions are not adhered to each other and can be separated in the thickness direction, air slightly passes through the ventilation holes between the films in the non-adhesion region 61a. It is possible to pass. Then, in the portion of the shrink film 60 that covers the gap G, as shown in FIG. 1B, a non-adhesive region 61a is arranged. In the present embodiment, the space between the mouth peripheral wall 4 a and the outer peripheral wall 11 has the upper end sealed by the inner plug 20 and the lower end sealed by the shrink film 60. Therefore, the through hole 4c communicates with the outside only through the ventilation hole of the non-adhesive region 61a provided in the shrink film 60. The air holes in the non-adhesion region 61a press the body portion of the double container body 2 with the positive pressure generated in the gap G, so that the film on the inner peripheral side of the non-adhesion region 61a presses the film on the outer peripheral side. Therefore, the vent hole of the non-adhesion region 61a is closed. Therefore, the non-bonding region 61a hardly discharges the air in the space between the outer layer body 4 and the inner layer body 3 to the outside. On the other hand, when the pressing of the body portion of the double container main body 2 is stopped, the negative pressure generated in the gap G separates the film on the inner peripheral side of the non-bonded region 61a from the film on the outer peripheral side (shown in FIG. 1C). (State), the vent hole of the non-adhesion region 61a is opened. The height and the width in the circumferential direction of the non-bonding region 61a can be arbitrarily set according to the volume of the double container 100 and the like.

The shrink film 60 also covers the entire cap body 10 and a part of the lid body 50 in the initial state before use (see FIG. 2 ). Then, as will be described later, the user removes the cap film 63 along the perforation 65 for film removal of the shrink film 60 and the perforation 67a for stopper as shown in FIG. 1A. Since the lid 50 and a part of the cap body 10 are exposed, the lid 50 is opened and the contents can be discharged from the pouring hole.

The shrink film 60 can be formed of, for example, a polystyrene (PS) film, a polyethylene terephthalate (PET) film, a polypropylene (PP) film, a polyvinyl chloride (PVC) film, or the like.

When discharging the contents from the double container 100 configured as described above, the user opens the lid 50 from the state of FIG. 1A, and the double container body 2 is changed from the standing posture to the tilted posture. After changing, the body portion of the outer layer body 4 is pressed (squeezed). Thereby, the accommodation space S is pressurized via the air between the inner layer body 3 and the outer layer body 4. As described above, when the body portion of the outer layer body 4 is being pressed, the positive pressure generated in the space G between the outer layer body 4 and the inner layer body 3 and the gap G causes the inner peripheral side of the non-bonding region 61a to move. Since the film presses the film on the outer peripheral side, the ventilation holes in the non-bonding area 61a are closed. Therefore, little air is discharged from the ventilation hole of the non-bonding region 61a via the through hole 4c and the gap G. Therefore, even if the outer layer body 4 is pressed, of the air between the inner layer body 3 and the outer layer body 4, almost no air leaks out from the ventilation hole of the non-bonding region 61a, so that the accommodation space S is not pressurized. It will not be hindered. Then, since the positive pressure in the accommodation space S lifts the valve body of the check valve, the content flows out through the check valve and is poured out from the pouring hole to the outside.

After pouring out the required amount of contents, the user releases the pressing of the outer layer body 4 against the body. As a result, the positive pressure in the storage space S returns to the atmospheric pressure and the check valve closes again, so that the outside air can be prevented from entering the storage space S. Further, the outer layer body 4 tries to return to its original shape by its own restoring force, so that the space between the inner layer body 3 and the outer layer body 4 becomes a negative pressure. As a result, the inside of the gap G also becomes a negative pressure through the through hole 4c. Due to this negative pressure, the film on the inner peripheral side of the non-adhesive region 61a is separated from the film on the outer peripheral side (the state shown in FIG. 1C), so that the vent holes of the non-adhesive region 61a are opened. Therefore, the outside air is introduced through the ventilation holes of the non-adhesion region 61a. The introduced outside air is supplied to the space between the outer layer body 4 and the inner layer body 3 via the gap G and the through hole 4c. As a result, the outer layer body 4 can be restored while the inner layer body 3 is deformed by volume reduction.

In addition, in the present embodiment, the non-adhesion region 61a is arranged so as to be included in the portion that covers the gap G of the shrink film 60, but is not limited to this mode. The non-adhesion region 61a may be arranged so that only a part in the vertical direction is included in the portion covering the gap G. Further, the non-adhesion region 61a may extend beyond the portion covering the gap G.

Further, in the present embodiment, the case where there is no adhesive band extending in the up-down direction that joins the inner layer body 3 and the outer layer body 4 or one adhesive band is provided has been described, but two adhesive bands are provided. When provided, the space between the outer layer body 4 and the inner layer body 3 is divided into two, so that it is necessary to provide the overlapping region 61 and the non-bonding region 61a for each of the two spaces. Therefore, when two adhesive bands are provided, both ends of the two shrink films 60 may be overlapped and adhered to each other, and two vertically overlapping regions 61 may be provided.

By the way, as described above, the shrink film 60 covers the entire cap body 10 and a part of the lid body 50 in the initial state before use. FIG. 2 shows an example of the configuration of the shrink film 60 in the initial state before use.

In the example of FIG. 2, of the shrink film 60, the upper portion of the outer peripheral wall 11, the entire lid peripheral wall 53 and the outer peripheral portion of the upper wall 52 are covered with the cap film 63 portion to be removed before use in the vertical direction. Two extending film removing perforations 65 are provided. The lower end of the film removing perforation 65 is connected to a stopper perforation 67a extending in the circumferential direction. Two stopper perforations 67b and 67c are further provided below the stopper perforations 67a. The three stopper perforations 67a to 67c extend in the circumferential direction in parallel with each other while being slightly separated in the vertical direction. The three stopper perforations 67a to 67c are formed above the non-bonding area 61a.

The user grips the upper end of the shrink film 60 and removes the cap film 63 along the perforation 65 for film removal and the perforation 67a for stopper. As a result, the lid 50 and a part of the cap body 10 are exposed as shown in FIG. 1A, so that the user can open the lid 50 and discharge the contents from the pouring hole. .. Further, the user can determine whether or not the double container 100 is in an unopened state based on the presence/absence of the cap film 63.

In addition, when the user vigorously cuts the shrink film 60 downward along the film removing perforations 65, a crack may run in the circumferential direction from the lower end of the film removing perforations 65 along the stopper perforations 67a. Moreover, a crack may run downward beyond the perforations 67a for the stopper. However, even in such a case, the force with which the user pulls the shrink film 60 downward is weakened by the crack running through the strong portion between the perforations 67a and 67b for the stopper, so that the crack is used for the stopper. After reaching the perforations 67b, the cap film 63 can be circumferentially removed along the perforations 67b for the stopper. In the present embodiment, since the stopper perforations 67c are further provided below the stopper perforations 67b, cracks do not extend beyond the stopper perforations 67c and extend downward. Therefore, when the user removes the cap film 63 before using the double container 100 for the first time, the function of the outside air introduction valve is not impaired by accidentally removing the non-adhesion region 61a.

The film removing perforations 65 extending downward from the upper end of the shrink film 60 are not limited to those extending vertically. Even if the film removing perforation line 65 is inclined with respect to the vertical direction, if the lower end of the film removing perforation line 65 is connected to the stopper perforation line 67a, the cap film does not affect the non-adhesive region 61a. This is because the 63 part can be similarly removed.

Further, in the present embodiment, the stopper perforations 67a to 67c are also configured to extend in the horizontal direction and the circumferential direction, but the present invention is not limited to this aspect. It may be inclined with respect to the horizontal direction as long as the cap film 63 can be removed when the cap film 63 is cut in the circumferential direction along the stopper perforations 67a to 67c.

FIG. 3 shows another configuration example of the shrink film 70 in the initial state before use. In the example of FIG. 3, as compared with FIG. 2, the film removing perforation 75 has an inclination with respect to the vertical direction, extends downward while drawing a spiral, and is connected to the stopper perforation 77a. .. Further, immediately below the stopper perforations 77a, stopper perforations 77b extend in parallel. In the example of FIG. 3 as well, the two stopper perforations 77a and 77b are formed above the non-bonding area.

The user grasps the upper end of the shrink film 70 and removes the cap film 73 along the perforation 75 for film removal and the perforation 77a for stopper. As a result, the lid 50 and a part of the cap body 10 are exposed as shown in FIG. 1A, so that the user can open the lid 50 and discharge the contents from the pouring hole. .. Further, the user can determine whether or not the double container 100 is in an unopened state based on the presence/absence of the cap film 73.

In the example of FIG. 3, even when the user vigorously cuts the shrink film 70 downward along the film removing perforation 75, the film removing perforation 75 and the stopper perforation 77a are Since they are connected at a shallow angle as compared with the example of FIG. 2, it is possible to relatively smoothly transition from cutting along the film removing perforations 75 to cutting along the stopper perforations 77a. Then, even if a crack runs in the circumferential direction along the stopper perforation 77a, the user pulls the shrink film 70 downward even if the crack runs downward beyond the perforation 77a for stopper. The momentum is weakened by the crack running in a strong portion between the stopper perforations 77a and 77b. Therefore, after the crack reaches the stopper perforations 77b, the cap film 73 is removed along the stopper perforations 77b. It can be removed circumferentially. Therefore, when the user removes the cap film 73 before using the double container 100 for the first time, the function of the outside air introduction valve is not impaired by accidentally removing the non-adhesive region.

FIG. 4 shows another configuration example of the shrink film 80 in the initial state before use. In the example of FIG. 4, as compared with FIG. 2, only one stopper perforation line 87a is provided, and the stopper perforation line 87a is overlapped with the circumferential groove 18a provided on the outer peripheral wall 11 of the cap body 10. It is located in. In the example of FIG. 4 as well, the perforation 87a for the stopper is formed above the non-adhesive area.

The user grips the upper end of the shrink film 80 and removes the cap film 83 along the perforation 85 for film removal and the perforation 87a for stopper. As a result, the lid 50 and a part of the cap body 10 are exposed as shown in FIG. 1A, so that the user can open the lid 50 and discharge the contents from the pouring hole. .. Further, the user can determine whether or not the double container 100 is in an unopened state based on the presence/absence of the cap film 83.

Note that, in the example of FIG. 4, even when the user pulls the shrink film 80 along the perforation 85 for film removal vigorously and cuts it down, the perforation 85 for film removal does not move inside the circumferential groove 18a. Since it is oriented in the circumferential direction, an angle is formed between the direction in which the shrink film 80 is drawn and the direction in which the film removing perforations 85 run. Therefore, since the force for tearing the film removing perforation 85 in the circumferential groove 18a is weakened, after the crack reaches the stopper perforation 87a, the crack does not occur further downward and the stopper perforation 87a is not formed. Along with this, the cap film 83 can be removed in the circumferential direction. Therefore, when the user removes the cap film 83 before using the double container 100 for the first time, the function of the outside air introduction valve is not damaged by accidentally removing the non-adhesive region.

In the example of FIG. 4, a further peripheral groove 18b running parallel to the peripheral groove 18a is provided. However, an additional stopper perforation may be provided so as to overlap the peripheral groove 18b. .. As a result, it is possible to more reliably suppress the loss of the function of the outside air introduction valve due to the shrink film 80 being erroneously removed to the non-adhesion region portion.

FIG. 5 shows another configuration example of the shrink film 90 in the initial state before use. In the example of FIG. 5, as compared with FIG. 2, an adhesive fixing region 19 is provided instead of the perforations 67b and 67c for stoppers. That is, as shown in FIG. 5, the lower end of the film removing perforation 95 is connected to the stopper perforation 97a, and the adhesive fixing region 19 is provided below and adjacent to the stopper perforation 97a. The shrink film 90 and the outer peripheral wall 11 are adhesively fixed in the adhesive fixing region 19. In the example of FIG. 5 as well, the stopper perforations 97a are formed above the non-adhesive area.

The user grips the upper end of the shrink film 90 and removes the cap film 93 along the perforation 95 for film removal and the perforation 97a for stopper. As a result, the lid 50 and a part of the cap body 10 are exposed as shown in FIG. 1A, so that the user can open the lid 50 and discharge the contents from the pouring hole. .. Further, the user can determine whether or not the double container 100 is in an unopened state based on the presence/absence of the cap film 93.

In the example of FIG. 5, even when the user cuts the shrink film 90 by pulling the shrink film 90 downward along the film removing perforations 95, the adhesive fixing region is formed below the stopper perforations 97a. Since 19 is provided, the crack does not traverse the adhesive fixing region 19 and run further downward. Therefore, after the crack reaches the lower end of the film removing perforation 95, the cap film 93 can be circumferentially removed along the stopper perforation 97a. Therefore, when the user removes the cap film 93 before using the double container 100 for the first time, it does not accidentally remove even the non-adhesive region portion to impair the function of the outside air introduction valve.

As described above, according to the present embodiment, in the double container 100 including the inner layer body 3 that stores the content and the squeezable outer layer body 4 that stores the inner layer body 3, the through hole 4c is formed in the outer layer body 4. A non-adhesive region 61a is provided in the circumferential overlap portion (overlap region 61) of the shrink film 60 that covers the outer layer body 4 from the outside while providing the (outside air introduction hole), and the vent hole and the through hole of the non-adhesive region 61a. The outside air is introduced into the space between the outer layer body 4 and the inner layer body 3 via both 4c. As a result, it is not necessary to newly install a member having the function of the outside air introducing valve, and the overlapping region 61 of the shrink film 60 can be provided with the function of the outside air introducing valve, so that the number of parts can be suppressed and the manufacturing cost can be reduced. You can

Further, according to the present embodiment, the through hole 4c is configured to communicate with the outside via only the vent hole of the non-adhesive region 61a, so that the inner layer body 3 and the outer layer body 4 are separated from each other when the body portion is pressed. Since it is possible to suppress the leakage of air as much as possible, it is possible to efficiently pressurize the accommodation space S and discharge the contents.

Further, according to the present embodiment, the through hole 4c is provided in the mouth peripheral wall 4a, and the shrink film 60 is configured to bridge the gap G between the lower end portion 11b of the cap body 10 and the outer layer body 4 and is not bonded. The area 61a is arranged so as to overlap the bridge area. As a result, the function of the outside air introduction valve can be concentrated around the mouth portion with a simple configuration, so that it is possible to prevent the pressing of the body portion or the like from being affected.

Further, according to the present embodiment, in the state before use, the film removing perforation 65 extends downward from the upper end of the shrink film 60, and the three stopper perforations 67a to 67c extending in the circumferential direction. The lower end of the film removing perforation 65 is connected to the stopper perforation 67a, and the three stopper perforations 67a to 67c are arranged above the non-adhesion region 61a. As a result, even if the user pulls the shrink film 60 vigorously downward to cut it, the force of pulling the shrink film 60 downward is weakened by the crack running through the strong portion between the perforations 67a and 67b for the stopper. Therefore, after the crack reaches the perforations for stopper 67b, the cap film 63 can be removed in the circumferential direction along the perforations for stopper 67b. Therefore, the cap film 63 can be removed along the film removing perforation line 65 and the stopper perforation line 67a or 67b, and the non-adhesion region 61a can be accidentally removed to impair the function of the outside air introduction valve. Absent.

Further, according to the present embodiment, the outer peripheral wall 11 of the cap body 10 is provided with the circumferential groove 18a extending in the circumferential direction, and the shrink film 80 has the film removing perforation 85 extending downward from the upper end, A stopper perforation line 87a extending in the circumferential direction, the film removal perforation line 85 is connected to the stopper perforation line 87a at the lower end, and the stopper perforation line 87a is arranged in an area overlapping the circumferential groove 18a. In addition, it is configured to be arranged above the non-bonding region. As a result, even if the user cuts the shrink film 80 by pulling it down vigorously, an angle is generated between the direction in which the shrink film 80 is drawn and the direction in which the film removing perforation 85 runs in the circumferential groove 18a portion. In 18a, the force for tearing the perforation 85 for film removal weakens. Therefore, after the crack reaches the perforation line 87a for the stopper, the cap film 83 can be removed along the perforation line 85 for film removal and the perforation line 87a for the stopper without further cracking. it can. Therefore, the function of the outside air introduction valve is not impaired by accidentally removing even the non-adhesive region.

Further, according to the present embodiment, the shrink film 90 is adjacent to the film removing perforation 95 extending downward from the upper end, the stopper perforation 97a extending in the circumferential direction, and below the stopper perforation 97a. And the cap body 10 and an adhesive fixing area 19 for adhesive fixing, the film removing perforation 95 is connected to the stopper perforation 97a at the lower end, and the stopper perforation 97a is a non-adhesive area. It is configured to be arranged above. As a result, even when the user cuts the shrink film 90 along the film removing perforations 95 by pulling the shrink film 90 downward, the adhesive fixing region 19 is provided below the stopper perforations 97a. Therefore, the crack does not traverse the adhesive fixing area 19 and run further downward. Therefore, the cap film 93 can be removed along the film removing perforations 95 and the stopper perforations 97a, and the function of the outside air introduction valve is not impaired by accidentally removing the non-adhesive region.

Further, according to the present embodiment, the film removing perforations 75 are configured to spirally extend downward from the upper end. As a result, the film removing perforation 75 and the stopper perforation 77a are connected at a shallow angle, so that the cutting along the film removing perforation 75 is relatively smoothly performed along the stopper perforation 77a. Can be moved to. Therefore, the cap film 73 can be removed along the perforation 75 for film removal and the perforation 77a for stopper, and the function of the outside air introduction valve is not impaired by accidentally removing the non-adhesive region.

Next, the double container 200 which is the second embodiment of the present invention will be specifically described with reference to FIGS. 6(a) and 6(b). The double container 200 according to the second embodiment is different from the first embodiment in that the through-hole 104c and the non-adhesive region 161a are provided in the enlarged diameter portion instead of being provided in the mouth peripheral wall 4a of the double container body 2. Other than that, the configuration is similar to that of the first embodiment. Therefore, here, only the differences from the first embodiment will be described in detail.

FIG. 6A is a front view showing the double container 200 according to the second embodiment of the present invention. A through hole 104c for taking in air is provided between the outer layer body 104 and the inner layer body 3 in the enlarged diameter portion. Further, as shown in FIG. 6A, a rectangular recess 104g is provided around the through hole 104c. Therefore, as shown in FIG. 6B, the through-hole 104c is formed at a position lower than the outer peripheral surface of the outer layer body 104 by the depth of the recess 104g in the inner peripheral direction. Further, a shrink film 160 is tightly fixed to the outer peripheral surface of the outer layer body 104 by thermal contraction. The shrink film 160 covers a part of the cap body 10 and a part of the expanded layer body, the body, and the bottom of the outer layer body 104. Both ends of the shrink film 160 in the circumferential direction are adhered to each other in an overlapped state, and the overlapped portion forms an overlapping region 161 shown in FIGS. 6A and 6B. As shown in FIG. 6A, the overlapping region 161 has a bonding region 161b in which overlapping portions are bonded to each other (shown by hatching in FIG. 6A), and overlapping portions are bonded to each other. And a non-bonding region 161a that can be separated in the thickness direction. That is, in the adhesion region 161b of FIG. 6A, since the overlapping portions are adhered to each other, air does not leak to the outside through this portion. On the other hand, in the non-adhesion region 161a, since the overlapping portions are not adhered to each other and can be separated in the thickness direction, air slightly passes through the ventilation holes between the separated films in the non-adhesion region 161a. It is possible to pass. Then, a non-bonding region 161a is arranged in a region overlapping the through hole 104c and the recess 104g as shown in FIG. 6A. Therefore, the through hole 104c communicates with the outside only through the vent hole of the non-adhesive region 161a. The vent hole of the non-adhesion region 161a is provided on the inner peripheral side of the non-adhesion region 161a by the positive pressure generated in the space between the outer layer body 104 and the inner layer body 3 even when the body portion of the double container body 102 is pressed. This film presses the film on the outer peripheral side, so that the air holes in the non-bonding area 161a are closed. Therefore, the non-bonding region 161a hardly discharges the air in the space between the outer layer body 104 and the inner layer body 3 to the outside. On the other hand, when the pressing of the body portion of the double container main body 102 is stopped, the film on the inner peripheral side of the non-bonded region 161a is separated from the film on the outer peripheral side by the negative pressure generated in the space between the outer layer body 104 and the inner layer body 3. In order to do so (the state shown in FIG. 6B), the vent holes in the non-adhesive region 161a are opened. The height and the width in the circumferential direction of the non-adhesive region 161a can be arbitrarily set according to the volume of the double container 200 and the like.

When discharging the contents from the double container 200 configured as described above, the user opens the lid 50 from the state of FIG. 6A, and the double container body 102 is changed from the standing posture to the tilted posture. After changing, the body portion of the outer layer body 104 is pressed (squeezed). Thereby, the accommodation space S is pressurized via the air between the inner layer body 3 and the outer layer body 104. As described above, when the body portion of the outer layer body 104 is pressed, the film on the inner peripheral side of the non-bonded region 161a is moved to the outer periphery by the positive pressure generated in the space between the outer layer body 104 and the inner layer body 3. Since the film on the side is pressed, the vent hole of the non-adhesion region 161a is closed. Therefore, the air is hardly discharged through the through hole 104c and the ventilation hole of the non-bonding area 161a. Therefore, even if the outer layer body 104 is pressed, of the air between the inner layer body 3 and the outer layer body 104, almost no air leaks out from the ventilation hole of the non-adhesion region 161a, so that the accommodation space S is not pressurized. It will not be hindered. Then, since the positive pressure in the accommodation space S lifts the valve body of the check valve, the content flows out through the check valve and is poured out from the pouring hole to the outside.

After pouring out the required amount of contents, the user releases the pressing of the outer layer body 104 against the body. As a result, the positive pressure in the storage space S returns to the atmospheric pressure and the check valve closes again, so that the outside air can be prevented from entering the storage space S. Further, since the outer layer body 104 tries to return to the original shape by its own restoring force, the space between the inner layer body 3 and the outer layer body 104 becomes a negative pressure. As a result, the space between the through hole 104c and the non-adhesion region 161a, that is, the recess 104g also has a negative pressure. Due to this negative pressure, the film on the inner peripheral side of the non-adhesive region 161a is separated from the film on the outer peripheral side (the state shown in FIG. 6B), so that the vent holes of the non-adhesive region 161a are opened. Therefore, the outside air is introduced through the ventilation holes of the non-adhesion region 161a. The introduced outside air is supplied to the space between the outer layer body 104 and the inner layer body 3 via the through hole 104c. As a result, the outer layer body 104 can be restored while the inner layer body 3 is deformed by volume reduction.

In addition, in the present embodiment, the through hole 104c and the recess 104g are provided in the expanded diameter portion of the outer layer body 104, but the present invention is not limited to this aspect, and is provided with the shrink film 160 such as being provided in the body portion of the outer layer body 104. It can be provided in any area.

Further, in the present embodiment, the concave portion 104g is formed in a rectangular shape, but the present invention is not limited to this aspect, and various other shapes such as a circular shape and an elliptical shape can be adopted.

Further, in the present embodiment, the non-adhesion region 161a is arranged so as to be included in a portion overlapping the through hole 104c or the recess 104g, but the present invention is not limited to this aspect. The non-adhesion region 161a may be arranged so that only a part in the vertical direction is included in a portion overlapping the through hole 104c or the recess 104g. Further, the non-bonding region 161a may extend beyond the through hole 104c or the recess 104g.

As described above, in the double container 200 of the present embodiment, the through hole 104c and the recess 104g are provided in the expanded diameter portion of the outer layer body 104 so that the non-bonding region 161a of the shrink film 160 overlaps the through hole 104c or the recess 104g. Configured to. Accordingly, it is not necessary to newly install a member having the function of the outside air introducing valve, and the shrink film 160 can be provided with the function of the outside air introducing valve, so that the number of parts can be suppressed and the manufacturing cost can be reduced. Further, by securing a region of the recess 104g to a certain extent, it is possible to relax the alignment accuracy of the non-bonding region 161a with respect to the outer layer body 104. In the present embodiment, as shown in FIG. 6A, since the longitudinal direction of the non-bonding region 161a is the vertical direction, the longitudinal direction of the recess 104g is also the vertical direction. The alignment accuracy of the region 161a can be appropriately relaxed.

Further, according to the present embodiment, in the normal shrink film 160 mounting process in which the shrink film 160 is circumferentially overlapped and adhered, the outside air introduction valve is provided only by providing a non-adhesive region 161a in a part in the vertical direction. Can have the function of. Therefore, the change of the manufacturing equipment of the double container 200 can be suppressed as much as possible.

In the present embodiment, the concave portion 104g is configured to have a shape that is long in the vertical direction, but the present invention is not limited to this aspect, and may be configured to be long in the circumferential direction according to the shape of the non-bonding region 161a and the like. ..

Next, the double container 300 which is the third embodiment of the present invention will be specifically described with reference to FIG. 7. The double container 300 according to the third embodiment is different from the second embodiment in that instead of forming the overlapping region 161 and the non-bonding region 161a by overlapping the circumferential ends of the shrink film 160 with each other. The configuration is similar to that of the second embodiment except that the valve body film 270 is arranged between the shrink film 260 and the outer layer body 104. Therefore, here, only the differences from the second embodiment will be described in detail.

FIG. 7 is an enlarged front view of a portion of the through hole 104c in the double container 300 according to the third embodiment of the present invention. A through hole 104c for taking in air is provided between the outer layer body 104 and the inner layer body 3 in the enlarged diameter portion. Further, as shown in FIG. 7, a rectangular recess 104g is provided around the through hole 104c. Therefore, the through-hole 104c is formed at a position lower than the outer peripheral surface of the outer layer body 104 by the depth of the recess 104g in the inner peripheral direction. Further, a shrink film 260 is tightly fixed to the outer peripheral surface of the outer layer body 104 by thermal contraction. The shrink film 260 covers a part of the cap body 10 and a part of the expanded diameter portion, the body portion, and the bottom portion of the outer layer body 104.

As shown in FIG. 7, a valve body film 270 is arranged between the shrink film 260 and the outer layer body 104. The overlapping area of the shrink film 260 and the valve body film 270 is an adhesive area 270b (shown by diagonal lines in FIG. 7) where the shrink film 260 and the valve body film 270 are bonded to each other, and the shrink film 260 and the valve body film 270. And a non-bonded region 270a that are not bonded to each other and can be separated in the thickness direction. In the non-adhesion region 270a, the shrink film 260 and the valve body film 270 are not adhered to each other and can be separated in the thickness direction, and in the non-adhesion region 270a of the shrink film 260, a film slit extending in the vertical direction is formed. 261 is provided. Therefore, a small amount of air can pass through the space between the shrink film 260 and the valve body film 270 in the non-bonding region 270a and the film slit 261. Then, as shown in FIG. 7, a non-bonding region 270a is arranged in a region overlapping the through hole 104c and the recess 104g. Therefore, the through hole 104c communicates with the outside through the space between the two films in the non-bonding area 270a and the film slit 261. The space between the two films in the non-bonded region 270a is not bonded to the non-bonded region 270a due to the positive pressure generated by the space between the outer layer body 104 and the inner layer body 3 even if the body of the double container body 102 is pressed. Since the valve body film 270 in (1) presses the shrink film 260 from the inside, the space between the two films in the non-adhesive region 270a is closed. Therefore, the non-bonding region 270a hardly discharges the air in the space between the outer layer body 104 and the inner layer body 3 to the outside. On the other hand, when the pressing of the body portion of the double container main body 102 is stopped, the valve body film 270 in the non-bonding region 270a is separated from the shrink film 260 by the negative pressure generated in the space between the outer layer body 104 and the inner layer body 3. The space between the two films in the non-bonding area 270a is opened. The height and the width in the circumferential direction of the non-bonding region 270a can be arbitrarily set according to the volume of the double container 300 and the like.

When discharging the contents from the double container 300 configured as described above, the user changes the posture of the double container main body from the standing posture to the tilted posture and presses the squeeze portion of the outer layer body 104 (squeeze). To do. Thereby, the accommodation space S is pressurized via the air between the inner layer body 3 and the outer layer body 104. As described above, when the body of the outer layer body 104 is pressed, the positive pressure generated in the space between the outer layer body 104 and the inner layer body 3 causes the valve body film 270 in the non-bonded region 270a to shrink the shrink film. Since 260 is pressed from the inner peripheral side, the space between the two films in the non-bonding region 270a is closed. Therefore, little air is discharged through the space between the two films in the non-bonding region 270a and the film slit 261 via the through hole 104c. Therefore, even if the outer layer body 104 is pressed, of the air between the inner layer body 3 and the outer layer body 104, almost no air leaks out from the space between the two films in the non-bonded region 270a, and therefore, into the accommodation space S. The pressurization of is not hindered. Then, since the positive pressure in the accommodation space S lifts the valve body of the check valve, the content flows out through the check valve and is poured out from the pouring hole to the outside.

After pouring out the required amount of contents, the user releases the pressing of the outer layer body 104 against the body. As a result, the positive pressure in the storage space S returns to the atmospheric pressure and the check valve closes again, so that the outside air can be prevented from entering the storage space S. Further, since the outer layer body 104 tries to return to the original shape by its own restoring force, the space between the inner layer body 3 and the outer layer body 104 becomes a negative pressure. As a result, the space between the through hole 104c and the non-bonding region 270a, that is, the recess 104g also becomes negative pressure. This negative pressure causes the valve body film 270 in the non-adhesion region 270a to separate from the shrink film 260, so that the space between the two films in the non-adhesion region 270a is opened. Therefore, the outside air is introduced through the space between the film slits 261 and the two films in the non-bonding area 270a. The introduced outside air is supplied to the space between the outer layer body 104 and the inner layer body 3 via the through hole 104c. As a result, the outer layer body 104 can be restored while the inner layer body 3 is deformed by volume reduction.

In addition, in the present embodiment, the through hole 104c and the recess 104g are provided in the enlarged diameter portion of the outer layer body 104, but the present invention is not limited to this aspect, and is provided with the shrink film 260 such as being provided in the body portion of the outer layer body 104. It can be provided in any area.

Further, in the present embodiment, the concave portion 104g is formed in a rectangular shape, but the present invention is not limited to this aspect, and various other shapes such as a circular shape and an elliptical shape can be adopted.

Further, in the present embodiment, the non-adhesion region 270a is arranged so as to be included in the portion overlapping the through hole 104c or the recess 104g, but the present invention is not limited to this aspect. The non-adhesion region 270a may be arranged so that only a part in the vertical direction is included in a portion overlapping the through hole 104c or the recess 104g. That is, the non-bonding region 270a may extend beyond the through hole 104c or the recess 104g.

As described above, in the double container 300 of the present embodiment, the through hole 104c and the recess 104g are provided in the expanded diameter portion of the outer layer body 104, and the valve body film 270 is arranged between the shrink film 260 and the outer layer body 104. The non-adhesive region 270a in the overlapping region of the shrink film 260 and the valve body film 270 is configured to overlap the through hole 104c or the recess 104g. In addition, when the film slit 261 is provided on the shrink film 260 side in the non-adhesion region 270a and a negative pressure is generated in the space between the outer layer body 104 and the inner layer body 3 by releasing the pressing of the body portion, the shrink in the non-adhesion region 270a is generated. A space is created between the film 260 and the valve body film 270, and the outside air can be introduced from the film slit 261 into the space between the outer layer body 104 and the inner layer body 3. That is, since the shrink film 260 can have the function of the outside air introduction valve only by adding the valve body film 270 and the film slit 261, it is possible to reduce the number of parts and manufacture at a low cost. Further, by ensuring the region of the recess 104g to be wide to some extent, the alignment accuracy of the non-bonding region 270a and the film slit 261 with respect to the outer layer body 104 can be relaxed. In the present embodiment, as shown in FIG. 7, the longitudinal direction of the non-adhesive region 270a is the vertical direction, so that the longitudinal direction of the concave portion 104g is also the vertical direction. Positioning accuracy can be appropriately relaxed.

Further, in the present embodiment, in addition to opening and closing the space between the two films in the non-adhesive region 270a, air leakage is limited by the film slit 261, so when the body of the outer layer body 104 is pressed, Air leakage from the non-contact area 270a can be suppressed more reliably.

In addition, in this embodiment, the concave portion 104g is configured to have a long shape in the vertical direction, but the present invention is not limited to this aspect, and may be configured to be long in the circumferential direction according to the shape of the non-bonding region 270a and the like. ..

Further, in the present embodiment, the right half of the valve body film 270 is the adhesive area 270b in FIG. 7, but the present invention is not limited to this aspect, and the upper half of the valve body film 270 may be the adhesive area 270b, for example.

Next, a double container 400 according to a fourth embodiment of the present invention will be specifically described with reference to FIGS. 8(a) and 8(b). The double container 400 according to the fourth embodiment is different from the second embodiment in that, instead of adhering both ends of the shrink film 160 in the circumferential direction to each other in the circumferential direction, the shrink film 160 is bonded in the circumferential direction of the shrink film 360. The configuration is similar to that of the second embodiment, except that both ends 360e are brought into contact with each other and the relevant contact portions are connected from the inner peripheral side by the connection film 370 (see FIG. 8B). Therefore, here, only the differences from the second embodiment will be described in detail.

FIG. 8A is an enlarged front view of a portion of the through hole 104c in the double container 400 according to the fourth embodiment of the present invention. A through hole 104c for taking in air is provided between the outer layer body 104 and the inner layer body 3 in the enlarged diameter portion. Further, as shown in FIG. 8A, a rectangular recess 104g is provided around the through hole 104c. Therefore, the through-hole 104c is formed at a position lower than the outer peripheral surface of the outer layer body 104 by the depth of the recess 104g in the inner peripheral direction. Further, a shrink film 360 is tightly fixed to the outer peripheral surface of the outer layer body 104 by thermal contraction. The shrink film 360 covers a part of the cap body 10 and a part of the expanded layer body, the body portion, and the bottom portion of the outer layer body 104. Then, as shown in FIGS. 8( a) and 8 (b ), the shrink film 360 is connected to the shrink film 360 from the inner peripheral side by the connection film 370 in a state where both circumferential end portions 360 e of the shrink film 360 are in contact with each other. The overlapping portions of the films 370 form the overlapping region 361. As shown in FIG. 8A, the overlapping area 361 includes an adhesive area 361b (indicated by diagonal lines in FIG. 8A) where the shrink film 360 and the connecting film 370 are adhered to each other, and the shrink film 360. The connecting film 370 and the non-adhesive region 361a are not adhered to each other and can be separated in the thickness direction. That is, since the shrink film 360 and the connecting film 370 are bonded to each other in the bonding region 361b of FIG. 8A, air does not leak to the outside through this part. On the other hand, in the non-adhesion region 361a, since the shrink film 360 and the connecting film 370 are not adhered to each other and can be separated in the thickness direction, the non-adhesion region 361a passes through the ventilation holes between the separated films in the non-adhesion region 361a. A small amount of air can pass through the gap between both ends 360e in the circumferential direction. Then, a part of the non-bonding region 361a is arranged in a region overlapping the through hole 104c and the recess 104g as shown in FIG. 8A. Therefore, the through hole 104c communicates with the outside only through the ventilation hole of the non-adhesion region 361a. The vent holes in the non-adhesive region 361a are connected to the connecting film 370 in the non-adhesive region 361a by the positive pressure generated in the space between the outer layer body 104 and the inner layer body 3 even when the body portion of the double container body 102 is pressed. Presses the shrink film 360, so that the vent hole of the non-adhesive region 361a is closed. Therefore, the non-bonding region 361a hardly discharges the air in the space between the outer layer body 104 and the inner layer body 3 to the outside. On the other hand, when the pressing of the body portion of the double container body 102 is stopped, the connection film 370 in the non-adhesive region 361a is separated from the shrink film 360 by the negative pressure generated in the space between the outer layer body 104 and the inner layer body 3, The ventilation hole of the non-bonding area 361a is opened. The height and the width of the non-bonding region 361a in the circumferential direction can be arbitrarily set according to the volume of the double container 400 and the like.

In discharging the contents from the double container 400 configured as described above, the user changes the posture of the double container main body 102 from the standing posture to the tilted posture and presses the squeeze portion of the outer layer body 104 (squeeze). ) Do. Thereby, the accommodation space S is pressurized via the air between the inner layer body 3 and the outer layer body 104. As described above, when the body portion of the outer layer body 104 is pressed, the connection film 370 in the non-adhesive region 361a is compressed by the shrink film 360 due to the positive pressure generated in the space between the outer layer body 104 and the inner layer body 3. The air holes in the non-adhesive region 361a are closed because the pressure is pressed. Therefore, little air is discharged from the ventilation hole of the non-bonding area 361a via the through hole 104c. Therefore, even if the outer layer body 104 is pressed, of the air between the inner layer body 3 and the outer layer body 104, almost no air leaks from the ventilation hole of the non-bonding region 361a, so that the accommodation space S is not pressurized. It will not be hindered. Then, since the positive pressure in the accommodation space S lifts the valve body of the check valve, the content flows out through the check valve and is poured out from the pouring hole to the outside.

After pouring out the required amount of contents, the user releases the pressing of the outer layer body 104 against the body. As a result, the positive pressure in the storage space S returns to the atmospheric pressure and the check valve closes again, so that the outside air can be prevented from entering the storage space S. Further, since the outer layer body 104 tries to return to the original shape by its own restoring force, the space between the inner layer body 3 and the outer layer body 104 becomes a negative pressure. As a result, the space between the through hole 104c and the non-adhesion region 361a, that is, the recess 104g also has a negative pressure. Due to this negative pressure, the connecting film 370 in the non-adhesion region 361a is separated from the shrink film 360, so that the vent hole in the non-adhesion region 361a is opened. Therefore, the outside air is introduced through the gaps in both circumferential end portions 360e and the vent holes in the non-bonding area 361a. The introduced outside air is supplied to the space between the outer layer body 104 and the inner layer body 3 via the through hole 104c. As a result, the outer layer body 104 can be restored while the inner layer body 3 is deformed by volume reduction.

In addition, in the present embodiment, the through hole 104c and the recess 104g are provided in the expanded diameter portion of the outer layer body 104, but the present invention is not limited to this aspect, and is provided with the shrink film 360 such as being provided in the body portion of the outer layer body 104. It can be provided in any area.

Further, in the present embodiment, the concave portion 104g is formed in a rectangular shape, but the present invention is not limited to this aspect, and various other shapes such as a circular shape and an elliptical shape can be adopted.

Further, in the present embodiment, the left portion of the non-bonded region 361a in FIG. 8A is arranged so as to be included in the portion overlapping the through hole 104c or the recess 104g, but the present invention is not limited to this aspect. The entire non-adhesion region 361a may be arranged so as to be included in a portion overlapping the through hole 104c or the recess 104g. In the present embodiment, since air is taken into the left and right sides from the gap between the circumferential end portions 360e of the shrink film 360 that abuts, either the left or right circumferential end portions 360e may overlap the through hole 104c or the recess 104g. .. Further, the non-adhesion region 361a and the through hole 104c or the recess 104g may overlap only part of the non-adhesion region 361a in the vertical direction. Further, the non-bonding region 361a may extend beyond the through hole 104c or the recess 104g.

As described above, in the double container 400 of the present embodiment, the shrink film 360 is connected from the inner peripheral side by the connecting film 370 in a state where both circumferential end portions 360e of the shrink film 360 are in contact with each other, and the shrink film 360 and the connecting film 370 are connected to each other. The overlapping portion is formed to form the overlapping region 361. In addition, a through hole 104c and a concave portion 104g are provided in the expanded diameter portion of the outer layer body 104, and a non-adhesive region 361a of the overlapping region 361 where both films are not bonded overlaps the through hole 104c or the concave portion 104g. As a result, the shrink film 360 can be provided with the function of the outside air introducing valve, so that the number of parts can be suppressed and the manufacturing can be performed at low cost. In addition, by ensuring the region of the recess 104g to be wide to some extent, the alignment accuracy of the non-bonded region 361a with respect to the outer layer body 104 can be relaxed. In the present embodiment, as shown in FIG. 8A, since the longitudinal direction of the non-bonding region 361a is the vertical direction, the longitudinal direction of the recess 104g is also the vertical direction. The alignment accuracy of the region 361a can be appropriately relaxed.

Further, according to the present embodiment, in the normal shrink film 360 mounting process in which both circumferential end portions 360e of the shrink film 360 are brought into contact with each other and are coupled from the inner circumferential side by the coupling film 370, one of the overlapping regions 361 is removed. The function of the outside air introduction valve can be provided only by providing the non-adhesion region 361a in the portion. Therefore, the change of the manufacturing equipment of the double container 400 can be suppressed as small as possible.

Further, in the present embodiment, in addition to opening and closing the vent hole between the two films in the non-adhesive region 361a, air leakage is limited by the gap between the circumferential end portions 360e, so that the body portion of the outer layer body 104 is prevented. When pressed, air leakage from the non-contact area 361a can be suppressed more reliably.

In the present embodiment, the concave portion 104g is configured to have a shape that is long in the vertical direction, but the present invention is not limited to this aspect, and may be configured to be long in the circumferential direction according to the shape of the non-adhesive region 361a and the like. ..

Although it has been described that the shrink film covering the cap body illustrated in FIGS. 2 to 5 can be applied to the double container 100 according to the first embodiment, the configuration is not limited to this combination. The configuration example of the shrink film that covers the cap body shown in FIGS. 2 to 5 can be applied to the double containers 200, 300, and 400 according to the second embodiment, the third embodiment, and the fourth embodiment. ..

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

According to the present invention, it is possible to provide the double container 100 having the function of the outside air introduction valve with a simple structure.

2 Double container main body 3 Inner layer body 3a Upper opening 4 Outer layer body 4a Mouth wall (mouth)
4b Male screw part 4c Through hole (outside air introduction hole)
4d groove part 10 cap body 11 outer peripheral wall 11b lower end part 12 female screw part 18a, 18b peripheral groove 19 adhesive fixing area 20 inner plug 26 seal wall 50 lid 51 hinge 52 upper wall 53 lid peripheral wall 58 grip portion 60 shrink film 61 overlapping area 61a Non-adhesive area 61b Adhesive area 63 Cap film 65 Perforation for film removal 67a, 67b, 67c Perforation for stopper 70 Shrink film 73 Cap film 75 Perforation for film removal 77a, 77b Perforation for stopper 80 Shrink film 83 Cap film 85 film removing perforation 87a stopper perforating 90 shrink film 93 cap film 95 film removing perforation 97a stopper perforating 100 double container 102 double container main body 104 outer layer 104c through hole (outside air introduction hole)
104g Recess 160 Shrink film 161 Overlapping area 161a Non-adhesive area 161b Adhesive area 200 Double container 260 Shrink film 261 Film slit (slit)
270 Valve body film 270a Non-adhesive area 270b Adhesive area 300 Double container 360 Shrink film 360e Circumferential both ends 361 Overlapping area 361a Non-adhesive area 361b Adhesive area 370 Connecting film 400 Double container G Gap S Storage space

Claims (7)

A double container comprising an inner layer body for containing contents and a squeezable outer layer body for containing the inner layer body,
A cap body that has a pouring hole for pouring out the contents from the inner layer body, and is attached to the mouth portion of the outer layer body,
It is located between the pouring hole and the inner layer body, and blocks communication between the pouring hole and the inner layer body, while the squeeze of the outer layer body increases pressure in the inner layer body and A check valve that communicates with the inner layer,
A shrink film that covers at least a part of the outer layer body and the cap body from the outside,
The shrink film has an overlapping area where the films are overlapped, and the overlapping area can be separated from the adhesion area where the overlapped films are adhered to each other and the overlapped film is not adhered in the thickness direction. With a non-adhesive area,
Outside air is introduced into the space between the outer layer body and the inner layer body through both the space between the stacked films in the non-adhesive region and the outside air introduction hole provided in the outer layer body ,
At least a part of the outer layer body and the cap body is covered by the shrink film so as to overlap in the circumferential direction, thereby forming the overlapping region extending in the vertical direction,
The outside air introduction hole is arranged at the mouth of the outer layer body, the shrink film covers from the outside so as to bridge the gap between the lower end of the cap body and the outer layer body, and at least a part of the non-adhesive region is A double container provided in a region bridging the gap . The double container according to claim 1, wherein the outside air introduction hole communicates with the outside only through a space between the stacked films in the non-adhesive region. A double container comprising an inner layer body for containing contents and a squeezable outer layer body for containing the inner layer body,
A cap body that has a pouring hole for pouring out the contents from the inner layer body, and is attached to the mouth portion of the outer layer body,
It is located between the pouring hole and the inner layer body, and blocks communication between the pouring hole and the inner layer body, while the squeeze of the outer layer body increases pressure in the inner layer body and A check valve that communicates with the inner layer,
A shrink film that covers at least a part of the outer layer body and the cap body from the outside.
Equipped with
The shrink film has an overlapping area where the films are overlapped, and the overlapping area can be separated from the adhesion area where the overlapped films are adhered to each other and the overlapped film is not adhered in the thickness direction. With a non-adhesive area,
Outside air is introduced into the space between the outer layer body and the inner layer body through both the space between the stacked films in the non-adhesive region and the outside air introduction hole provided in the outer layer body,
The outside air introduction hole is arranged in the expanded diameter portion or the body portion of the outer layer body, a recess is provided around the outside air introduction hole in the outer peripheral surface of the outer layer body,
Further comprising a connecting film that connects both ends in the circumferential direction of the shrink film covering at least a part of the outer layer body and the cap body from the circumferential direction from the inner circumferential side,
The overlapping portion of the shrink film and the connecting film forms the overlapping region,
Double container wherein at least a portion of the non-adhesive region and being provided in a region overlapping with the outside air introduction hole or the recess. The shrink film has a film removing perforation extending downward from the upper end and a plurality of stopper perforations aligned in the up-down direction and extending in the circumferential direction. was observed connection between uppermost perforations stopper out of the perforations stopper, perforation for the plurality of stopper than said non-adhering region is located above any one of claims 1 to 3 Double container according to paragraph. A double container comprising an inner layer body for containing contents and a squeezable outer layer body for containing the inner layer body,
A cap body that has a pouring hole for pouring out the contents from the inner layer body, and is attached to the mouth portion of the outer layer body,
It is located between the pouring hole and the inner layer body, and blocks communication between the pouring hole and the inner layer body, while the squeeze of the outer layer body increases pressure in the inner layer body and A check valve that communicates with the inner layer,
A shrink film that covers at least a part of the outer layer body and the cap body from the outside.
Equipped with
The shrink film has an overlapping area where the films are overlapped, and the overlapping area can be separated from the adhesion area where the overlapped films are adhered to each other and the overlapped film is not adhered in the thickness direction. With a non-adhesive area,
Outside air is introduced into the space between the outer layer body and the inner layer body through both the space between the stacked films in the non-adhesive region and the outside air introduction hole provided in the outer layer body,
A circumferential groove extending in the circumferential direction is provided on the outer peripheral wall of the cap body, and the shrink film has a film removing perforation extending downward from the upper end and a stopper perforation extending in the circumferential direction. the film removal perforations connected to the perforations for the stopper at the lower end, perforations for the stopper, it is disposed higher than the disposed in a region overlapping with the circumferential groove and the non-adhesive area Double container characterized by . A double container comprising an inner layer body for containing contents and a squeezable outer layer body for containing the inner layer body,
A cap body that has a pouring hole for pouring out the contents from the inner layer body, and is attached to the mouth portion of the outer layer body,
It is located between the pouring hole and the inner layer body, and blocks communication between the pouring hole and the inner layer body, while the squeeze of the outer layer body increases pressure in the inner layer body and A check valve that communicates with the inner layer,
A shrink film that covers at least a part of the outer layer body and the cap body from the outside.
Equipped with
The shrink film has an overlapping area where the films are overlapped, and the overlapping area can be separated from the adhesion area where the overlapped films are adhered to each other and the overlapped film is not adhered in the thickness direction. With a non-adhesive area,
Outside air is introduced into the space between the outer layer body and the inner layer body through both the space between the stacked films in the non-adhesive region and the outside air introduction hole provided in the outer layer body,
The shrink film is arranged adjacent to a film removing perforation extending downward from the upper end, a perforation for a stopper extending in the circumferential direction, and a perforation for the stopper, and is fixed to the cap body by adhesive. and a bonded area, the film removal perforation is connected to the perforation stopper at the lower end, perforations for the stopper, and characterized in that it is arranged above the non-adhesive area double container to. The double container according to claim 5 or 6 , wherein the perforation for film removal extends spirally downward from the upper end.

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