JP6883945B2 - Double container cap - Google Patents

Description

INDUSTRIAL APPLICABILITY The present invention is a double container body having a volume-reducing deformable inner layer body for accommodating the contents and an outer layer body for accommodating the inner layer body inside, and the contents can be dispensed by being attached to the mouth of the container body. Regarding container caps.

As a container for storing cosmetics such as lotion, shampoo, conditioner, liquid soap, food seasonings, etc., an inner layer body that can accommodate such contents and is provided so that the volume can be reduced and deformed, and this inner layer body. There is known a double container having an outer layer body that forms the outer shell of the container while accommodating the container inside. In this double container, there are a delamination container (laminated peeling container) formed by laminating an outer layer body and an inner layer body from the beginning, and a type container in which the outer layer body and the inner layer body are individually formed and assembled. The delamination container is made of EBM (Extrusion Blow Molding), in which a laminated parison that has been heated and melted is sandwiched between molds and air is blown into the container to form a laminated container, and the outer layer and the inner layer are separated. There is a biaxially stretched blow molding method in which a laminated container is formed from a preform (container material) formed in a bottomed tubular shape. In such a double container, a cap for a double container is usually provided at the mouth of the outer layer body with a pouring cylinder for pouring out the contents and a check valve for preventing the intrusion of outside air into 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, thereby opening the valve body of the check valve and pouring out the contents. Further, the outer layer body is provided with a through hole for taking in outside air between the outer layer body and the inner layer body, and when the outer layer body is restored to its original shape after pouring, the outside air is taken in from this through hole and the inner layer body becomes Only the outer layer is restored while the volume is reduced and deformed.

By the way, in the above-mentioned double container cap, the check valve for preventing the intrusion of outside air into the inner layer is provided with three arms inside in the radial direction of a cylindrical annular wall as in Patent Document 1, for example. A flat valve body to be connected is used. In this type of check valve, the air between the outer layer body and the inner layer body is compressed by pressing the outer layer body, and the valve body is pushed up in the direction of the pouring cylinder by the pressure increase accompanying this, and becomes the inner layer body. The communication port can be opened and the contents can be poured out. When the outer layer is restored to its original shape after the contents are poured out, the air pressure between the outer layer and the inner layer decreases, and the valve body closes originally due to the pressure difference and the elastic force of the three arms. Return to position.

Japanese Unexamined Patent Publication No. 2013-151316

However, in the check valve having the above structure, when the inner layer is filled with the contents such as powdery or granular seasoning, the valve body in the open state returns to the closed state. The contents get in between the body and the bulkhead, and the valve body cannot return to a completely closed state. In such a case, since the air enters the inner layer after the discharge of the contents is completed, the moist air remains in the inner layer when the outside is in a humid environment, and the powder of the contents or the like remains. There is a problem that it easily oxidizes or absorbs moisture to solidify.

An object of the present invention is to solve such a problem, and an object of the present invention is to easily exhaust air that has entered the inner layer body with the lid closed. It is to provide a double container cap that allows the completion of exhaust to be visually recognized from the outside.

The double container cap of the present invention includes a cap body that can be attached to the mouth of a double container body having a volume-reducing deformable inner layer body that houses the contents and an outer layer body that houses the inner layer body inside. The pouring hole for the contents provided in the cap body can be opened and closed, and by closing the pouring hole, a sealing space for communicating with the pouring hole and sealing the contents is formed. A possible lid, a one-way valve provided facing the sealed space to allow the discharge of air from the sealed space to the outside world, while blocking the entry of air into the sealed space, and the sealed space. It is characterized in that it is provided with a film body that is provided facing the surface and can be deformed according to a change in pressure difference between the front and back surfaces, and the deformation of the film body can be visually recognized from the outside world.

Further, in the double container cap of the present invention, it is preferable that the film body is arranged inside the lid body, and the lid body is provided with an opening for exposing the film body to the outside.

Further, in the double container cap of the present invention, the film body is arranged inside the lid body, and the film body is exposed to the outside of the lid body through a through hole provided in the lid body. It is preferable that the extension portion is provided integrally.

Further, it is preferable that the double container cap of the present invention is provided with a sound emitting portion that produces a sound by passing air when air is exhausted from the injection hole to the outside through the sealed space.

Further, in the double container cap of the present invention, it is preferable that the one-way valve is integrally formed with the membrane body.

According to the present invention, it is possible to provide a double container cap in which the air that has entered the inner layer body can be easily discharged with the lid closed, and the completion of the exhaust can be visually recognized from the outside. ..

It is a front sectional view which shows the state which attached the cap for the double container which concerns on one Embodiment of this invention to a double container body, (a) shows the state before exhaust, (b) is the state after exhaust completion. Is shown. It is a figure which shows the modification of the double container cap of FIG. 1, (a) is the front sectional view which shows the state which the double container cap is attached to the double container body, (b) is (a). It is sectional drawing of AA of AA, and (c) is the perspective view which shows the surrounding wall of the sound producing part. It is a front sectional view showing another modification of the cap for a double container of FIG. 1 in a state of being attached to a double container body, (a) shows a state before exhaust, and (b) is a state after exhaust is completed. Is shown.

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

FIG. 1 shows a state in which the double container cap 1 according to the embodiment of the present invention is attached to a double container main body 2 suitable for the double container cap 1. In this specification, the side where the lid 20 described later is located is referred to as the upper side (upper side in FIG. 1), and the side where the double container body 2 is located is referred to as the lower side (lower side in FIG. 1). The double container cap 1 is composed of a cap body 10 and a lid 20. Further, the double container main body 2 is composed of an inner layer body 3 and an outer layer body 4.

First, the double container main body 2 will be described. In the present embodiment, the double container main body 2 forms a laminated peeling container by performing extrusion blow molding on a parison formed by laminating the synthetic resin material of the inner layer 3 and the synthetic resin material of the outer layer 4. I'm shaping. Ethylene-vinyl alcohol copolymer resin (EVOH) or nylon is used as the material of the inner layer 3 constituting the double container main body 2. Further, low density polyethylene (LDPE) or high density polyethylene resin (HDPE) is used as the material of the outer layer body 4, and high squeeze property can be imparted particularly when LDPE is used. However, the present invention is not limited to this aspect, and when a laminated peeling container is formed by, for example, biaxial stretching blow molding, polypropylene (PP) is used as the material of the inner layer body 3, and polypropylene (PP) 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 compatibility with each other can be used. Further, the double container main body 2 may not be a laminated peeling container, but may be a container in which an outer layer body and an inner layer body are individually formed and assembled.

The inner layer body 3 is formed so as to be deformable in volume reduction, and in the present embodiment, it is obtained by peeling the double container main body 2 formed in a laminated state from the outer layer body 4. .. The inner layer body 3 is provided with a storage space S for accommodating the contents inside the inner layer body 3.

The outer layer body 4 is formed by connecting a body portion having a reconstructable flexibility (not shown) and a bottom portion (not shown) that closes the lower end of the body portion to a cylindrical mouth peripheral wall 4a. .. As shown in FIG. 1, a container rib 4b facing the cap rib 12a provided on the inner peripheral surface of the outer peripheral wall 11 of the cap body 10 to be described later is provided on the outer peripheral surface of the mouth peripheral wall 4a. Further, a neck ring 4g is provided below the container rib 4b.

In addition, in FIG. 1, when the outer layer body 4 is restored to the original shape by its own rigidity after the inner layer body 3 is volume-reduced and deformed by pressing the body portion of the outer layer body 4, the outer layer body 4 and the inner layer body 3 become The space between them becomes negative pressure. At this time, air is introduced into the space between the outer layer body 4 and the inner layer body 3 from the slit formed in the pinch-off portion at the bottom of the double container main body 2 formed by blow molding.

Next, the cap body 10 constituting the double container cap 1 will be described with reference to FIG. The cap body 10 includes an outer peripheral wall 11 surrounding the mouth peripheral wall 4a, and a cap rib 12a facing the container rib 4b of the mouth peripheral wall 4a is formed on the inner peripheral surface of the outer peripheral wall 11. Further, below the cap rib 12a, an inner wall protrusion 12b for undercut engagement of the cap body 10 with the mouth peripheral wall 4a is provided. Then, when the cap body 10 is pushed into the mouth portion 2a from above, the inner wall protrusion 12b of the cap body 10 gets over the container rib 4b of the mouth peripheral wall 4a, and the upper end 2b of the mouth portion of the double container body 2 becomes It abuts on the lower surface of the top wall 19 of the cap body 10. As a result, the cap body 10 is firmly fixed to the mouth portion 2a in the vertical direction. At this time, since the cap ribs 12a provided intermittently in the circumferential direction enter between the container ribs 4b provided intermittently in the same manner, the cap body 10 also rotates in the circumferential direction with respect to the mouth portion 2a. It is fixed in the stopped state.

The top wall 19 is integrally connected to the upper part of the outer peripheral wall 11 of the cap body 10. A pouring cylinder 14c is arranged at the center of the top wall 19, and an opening penetrating the pouring cylinder 14c constitutes a pouring hole 14a for pouring out the contents. Further, the inner peripheral wall 18 hangs downward from the lower surface of the top wall 19. When the cap body 10 is undercut engaged with the mouth portion 2a, the upper end 2b of the mouth portion comes into contact with the lower surface of the top wall 19, and the outer peripheral surface of the inner peripheral wall 18 fits into the inner peripheral surface of the mouth portion 2a. As a result, the mouth portion 2a is well sealed by the top wall 19 and the inner peripheral wall 18, and the contents in the double container main body 2 are discharged to the outside only through the injection hole 14a. A lid hinge 15 for rotatably connecting the lid 20, which will be described later, is provided on the upper portion of the outer peripheral wall 11 of the cap body 10.

As shown in FIG. 1, the lid 20 has a lid main body 30 connected to the upper part of the cap main body 10 by a lid hinge 15, and an upper lid 40 rotatably connected to the lid main body 30 by an upper lid hinge 41. And an elastic valve member 50 made of an elastic material such as an elastomer, and the pouring hole 14a can be opened and closed by rotating the entire lid 20 via a lid hinge 15. The lid body 30 and the upper lid 40 may be configured to be closed by screw engagement or undercut engagement instead of the hinges, respectively. The lid body 30 is provided with a lid peripheral wall 33 so as to be connected to the outer peripheral wall 11 of the cap body 10. A lid step portion 30a is provided on the lid peripheral wall 33, and the lid step portion 30a undercuts and engages with the top wall step portion 19a when the lid 20 is closed, and the lid 20 is a cap body 10 Is fixed to.

A disk-shaped upper wall 31 is continuously provided at the upper end of the lid peripheral wall 33. At least one ventilation hole 31a is provided in the central portion of the upper wall 31 to allow the passage of air by communicating with the injection hole 14a when the lid 20 is closed. It is preferable that the at least one ventilation hole 31a has a size that allows air to pass smoothly while blocking the passage of powdery or granular contents as much as possible. On the outer peripheral side of the ventilation hole 31a, a lower seal cylinder 31b that is in airtight contact with the outer peripheral surface of the injection cylinder 14c is vertically hung from the upper wall 31. Further, on the upper surface of the upper wall 31, a cylindrical upper seal cylinder 31c that stands up on the outer peripheral side of at least one ventilation hole 31a is erected.

The elastic valve member 50 described above is arranged on the inner peripheral side of the upper seal cylinder 31c. The elastic valve member 50 includes a base portion 51 having a substantially cylindrical shape, and a one-way valve 52 that is connected to the outer peripheral surface of the base portion 51 and extends upward and toward the outer peripheral side. Between the bottom surface of the base 51 and the upper surface of the upper wall 31, a gap serving as an air passage is formed by a plurality of ribs 31d radially provided on the upper surface of the upper wall 31. The ribs 31d may be provided on the bottom surface side of the base portion 51. Further, the outer peripheral edge portion of the one-way valve 52 is in airtight contact with the inner peripheral surface of the upper seal cylinder 31c.

A film body 53 forming a circular dome shape is continuously provided on the upper portion of the base portion 51. Further, the upper portion of the base portion 51 is brought into contact with the closed upper lid 40 by rotating via the upper lid hinge 41, so that the upper portion is prevented from coming out upward. Specifically, the upper portion of the base portion 51 is in contact with the peripheral edge portion of the circular opening 42 formed in the central portion of the upper lid 40. Further, in this state, the film body 53 is exposed to the outside world from the opening 42. The outer wall portion 43 hanging from the outer peripheral edge portion of the upper lid 40 holds the closed state of the upper lid 40 by undercut engagement with the cylindrical engaging cylinder 31e rising from the upper wall 31. Further, between the outer wall portion 43 of the upper lid 40 and the engaging cylinder 31e, a ventilation path leading to the outside world is formed by a groove 31f provided on the outer peripheral surface of the engaging cylinder 31e. Such a ventilation path may be formed by a groove provided in the outer wall portion 43, or may be formed by providing a through hole in the upper lid 40.

Since the lid 20 is configured as described above, the sealing space M communicating with the injection hole 14a can be formed by closing the injection hole 14a. In the present embodiment, the sealing space M is a closed space surrounded by the injection cylinder 14c, the lower seal cylinder 31b, the upper seal cylinder 31c, and the elastic valve member 50. By forming such a sealed space M, when the body of the double container body 2 is pressed to increase the pressure in the accommodation space S, the one-way valve 52 opens and the air from the sealed space M toward the outside world. On the other hand, when the pressure in the accommodation space S drops due to the release of the pressure, the one-way valve 52 can be closed to prevent air from entering the sealed space M from the outside world.

Next, a method of discharging the contents using the double container cap 1 of the present embodiment will be specifically described.

When discharging the contents from the double container cap 1, the lid 20 is rotated and opened via the lid hinge 15, and the double container body 2 is tilted to be in a tilted posture to form a powder or a powder. The granular contents fall by their own weight and are discharged from the pouring hole 14a. At this time, by pressing the body portion of the outer layer body 4 and reducing the volume of the inner layer body 3 through the air between the outer layer body 4 and the inner layer body 3, the inside of the inner layer body 3 becomes a positive pressure, and the contents are released. Further, it can be discharged from the injection hole 14a vigorously. When the inner layer body 3 is deformed by reducing the volume by pressing the body portion, the outer layer body 4 is restored to its original shape due to its own rigidity, so that a negative pressure is applied between the outer layer body 4 and the inner layer body 3. Occurs. Due to this negative pressure, external air is introduced into the space between the outer layer body 4 and the inner layer body 3 through the slit at the pinch-off portion at the bottom.

By the way, when the content is discharged from the injection hole 14a, air is introduced into the inner layer 3 from the injection hole 14a instead of the discharged content. At this time, if the outside is in a humid environment, moist air will enter the inner layer 3.

When the discharge of the contents is completed, the user returns the double container body 2 from the tilted posture to the standing posture. Then, by closing the lid 20, the above-mentioned sealed space M is formed. At this time, the film body 53 has an upward convex shape as shown in FIG. 1, and this state is visible from the outside world through the opening 42 of the upper lid 40. In this state, the user presses the body of the outer layer body 4. As a result, the inside of the inner layer body 3 becomes a positive pressure, and the inside of the sealed space M communicating with the inside of the inner layer body 3 through the injection hole 14a also becomes a positive pressure. Therefore, the one-way valve 52 provided facing the sealed space M opens, and air is discharged from the sealed space M toward the outside world. At this time, the air is discharged through the injection hole 14a, the ventilation hole 31a, the gap formed between the one-way valve 52 and the upper seal cylinder 31c, and the groove 31f.

Then, when the pressing of the body portion is stopped, the one-way valve 52 abuts on the upper seal cylinder 31c again to prevent air from entering the sealing space M. Therefore, by repeating such pressing and releasing of the body portion, the air in the inner layer 3 is appropriately discharged to the outside world, so that the powder or the like of the contents absorbs moisture and solidifies or is oxidized. There is nothing to do. Further, by discharging the air in the inner layer body 3, the volume of the inner layer body 3 can be kept small according to the remaining amount of the contents. As a result, for example, when the content is a tablet, the tablet does not move significantly inside the inner layer 3, so that the tablet can be prevented from being chipped or cracked. At this time, due to the rigidity of the outer layer body 4, air is taken into the space between the outer layer body 4 and the inner layer body 3 from the slit formed at the bottom by the volume of the discharged air, and the pressed body portion is pressed. It returns to its original shape.

Here, when the air inside the inner layer body 3 is sufficiently discharged to the outside world, the pressure inside the inner layer body 3 becomes a negative pressure with respect to the outside world. Then, the inside of the sealed space M communicating with the inside of the inner layer 3 also becomes a negative pressure. Therefore, as shown in FIG. 2, the film body 53 provided facing the sealed space M is inverted and deformed so as to form a downward convex shape. Therefore, the user can know that the sufficient discharge of air has been completed by visually recognizing the state of the film body 53 from the outside world. Here, the thickness of the film body 53 can be appropriately set according to the required amount of exhaust gas preset according to the type of the contents and the like. Then, by setting an appropriate thickness of the film body 53, the film body 53 can be configured to be inverted and deformed only when the required amount of exhaust is completed.

As described above, the double container cap 1 of the present embodiment faces the lid 20 and the sealing space M, which can form a sealing space M communicating with the injection hole 14a by closing the injection hole 14a. A one-way valve 52 that allows the discharge of air from the sealed space M toward the outside world while blocking the entry of air into the sealed space M, and the pressure on the front and back surfaces that are provided facing the sealed space M. A film body 53 that can be deformed according to a change in the difference is provided, and the deformation of the film body 53 can be visually recognized from the outside world. Therefore, when the lid 20 is closed after the contents are discharged, the air in the inner layer 3 can be easily discharged, so that the powder or the like of the contents is prevented from absorbing moisture and solidifying or oxidizing. Moreover, by visually recognizing the deformed state of the film body 53, it is possible to know that sufficient air discharge has been completed.

Further, in the double container cap 1 of the present embodiment, the film body 53 is arranged inside the lid body 20, and the lid body 20 is provided with an opening 42 for exposing the film body 53 to the outside. It has become. Therefore, according to the double container cap 1 of the present embodiment, the above-mentioned effect can be obtained by a simple configuration.

Further, in the double container cap 1 of the present embodiment, since the one-way valve 52 is integrally formed with the membrane body 53, further simplification of the configuration is realized.

Further, in addition to the configuration in the case of the above-described embodiment, a sound emitting unit 60 as shown in FIG. 2 is provided so that the user can confirm that the air is discharged as intended at the time of discharging the air. It is preferable to provide it. The sound output unit 60 can be configured to generate sound by the passage of air when the air is exhausted from the injection hole 14a to the outside through the sealed space M. In the double container cap 1'of the modified example shown in FIG. 2, the sound output portion 60 includes a tongue piece portion 61 extending radially outward from the upper end of the upper seal cylinder 31c and an upper seal cylinder suspended from the upper lid 40. A cylindrical upper lid seal cylinder 62 having a notch 62a in close contact with 31c and at a position corresponding to the tongue piece 61, and a siege protrusion protruding from the lower surface of the upper lid 40 and extending along the peripheral edge of the tongue piece 61. It has Article 63. Then, the tongue piece 61 trembles and can emit a sound due to the turbulent flow of air generated when passing between the tongue piece 61 and the surrounding ridge 63.

Further, in the embodiment shown in FIG. 1, the film body 53 is configured to be directly visible from the outside world, but for example, as shown in FIG. 3, the state of the film body 53 is configured to be indirectly visible. May be good. In the double container cap 1 "of the modified example shown in FIG. 3, the film body 53" is arranged inside the lid body 20 ", and the film body 53" is attached to the lid body 20 "(upper lid 40"). An extension portion 54 exposed to the outside of the lid 20 through the provided through hole 44 is integrally provided. It should be noted that such a configuration can also be adopted in the case of the embodiment shown in FIG.

It should be noted that the above description merely shows an embodiment of the present invention, and various modifications can be made within the scope of the claims. For example, in the above-described embodiment, the one-way valve 52 and the membrane body 53 are integrally formed, but they may be formed separately, and their arrangement can be changed as appropriate.

1,1', 1 "Double container cap 2 Double container body 2a Mouth 2b Mouth top 3 Inner layer 4 Outer layer 4a Mouth peripheral wall 4b Container rib 4g Neck ring 10 Cap body 11 Outer wall 12a Cap rib 12b Inner wall protrusion 14a Injection hole 14c Injection cylinder 15 Lid hinge 18 Inner peripheral wall 19 Top wall 19a Top wall step 20, 20 "Lid body 30 Lid body 30a Lid step 31 Upper wall 31a Vent 31b Lower side Seal cylinder 31c Upper seal cylinder 31d Rib 31e Engagement cylinder 31f Groove 33 Lid peripheral wall 40, 40 "Top lid 41 Top lid hinge 42 Opening 43 Outer wall 44 Through hole 50, 50" Elastic valve member 51 Base 52 One-way valve 53, 53 ”Membrane 54 Extension 60 Sound output 61 Tongue piece 62 Top lid seal tube 62a Notch 63 Surrounding ridge S Containment space M Sealed space

Claims (5)

A cap body that can be attached to the mouth of a double container body having a volume-reducing deformable inner layer body that houses the contents and an outer layer body that houses the inner layer body inside.
The pouring hole of the contents provided in the cap body can be opened and closed, and by closing the pouring hole, it is possible to form a sealing space that communicates with the pouring hole and seals the contents. With a nice lid
A one-way valve that is provided facing the sealed space and allows air to be discharged from the sealed space to the outside world, while blocking air from entering the sealed space.
A membrane body provided facing the sealed space and deformable according to a change in pressure difference between the front and back surfaces is provided.
A double container cap characterized in that the deformation of the membrane body can be visually recognized from the outside world. The membrane body is arranged inside the lid body and
The double container cap according to claim 1, wherein the lid body includes an opening for exposing the film body to the outside. The membrane body is arranged inside the lid body and
The double container cap according to claim 1, wherein the membrane body is integrally provided with an extension portion exposed to the outside of the lid body through a through hole provided in the lid body. The double container cap according to any one of claims 1 to 3, further comprising a sound producing portion that produces a sound by the passage of air when air is exhausted from the injection hole to the outside world through the sealed space. The double container cap according to any one of claims 1 to 4, wherein the one-way valve is integrally formed with the membrane body.

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