JP2016033039A - Double container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double container making variation in a foam quality small by preventing counter flow of content fluid remaining in an expanded material, and further simplified in a structure.SOLUTION: A double container 1A is provided with a non-return valve 5 which includes: a cylindrical body 5a partitioning an interval between a liquid inflow port 4b and an air inflow port 4g between an inside plug 4A and a dispensing cap 7A, and surrounding and holding an expanded material 6; a liquid valve body 5c closing the liquid inflow port 4b by being connected to an internal surface of the cylindrical body 5a, and on the other hand, opening the liquid inflow port 4b by compressing a storage space S; an air valve body 5d closing the air inflow port 4g by being connected to an external surface of the cylindrical body 5a, and on the other hand, opening the air inflow port 4g by compressing an inner space N; and an air outflow port 5e penetrated into the cylindrical body 5a and opened toward a lateral face of the expanded material 6 so as to flow air from the air inflow port 4g.SELECTED DRAWING: Figure 1

Description

  The present invention includes a volume-deformable inner layer body that contains the content liquid, and an outer layer body that houses the inner layer body to form the outer shell of the container, and only the inner layer body is extracted along with the dispensing of the content liquid. The present invention relates to a double container for volume reduction, and in particular, to a technique capable of pouring the content liquid into a foam.

  As a container to store cosmetics such as lotion, shampoo, rinse or liquid soap, food seasoning or chemicals, etc. An outer layer body that forms an outer shell of the container, and the content liquid is poured out by pressing the body part of the outer layer body, while the body part is restored after the release of the pressure, and between the inner layer body and the outer layer body A double container (also referred to as a delamination container or a delamination container) is known in which outside air is introduced into the formed internal space so that the volume of the inner layer body can be reduced. For example, Patent Document 1 discloses a squeeze-type double container for pouring foam, in which a former cap is attached to such a double container, and the content liquid can be poured out in the form of foam. .

JP 2009-149327 A

  By the way, in the container of patent document 1, since the passage of the content liquid and the air passage leading to the gas-liquid mixing chamber are always open, the content liquid remaining in the mesh member and the dispensing nozzle may flow back to these passages. There is. Here, the foam quality of the content liquid is greatly influenced by the ratio of the content liquid and the air to be mixed. If the remaining content liquid flows backward, the mixing ratio of the content liquid and air will be changed at the next dispensing. It will change and lead to deterioration of foam quality. For this reason, in order to prevent the backflow of the remaining content liquid, it has been studied to provide a check valve in the passage of the content liquid and air, but the structure is not complicated and there is still room for study. .

  An object of the present invention is to solve such problems, and an object of the present invention is to provide a new structure that can further simplify the structure when providing a check valve for closing the passage of the content liquid and air. A double container is proposed.

The present invention relates to an inner layer body capable of volume-reducing deformation having a content liquid storage space, and an outer layer having a vent hole penetrating the peripheral wall of the mouth and forming an inner space between the inner layer body and the vent hole. Body, a partition covering the upper opening of the inner layer body, a liquid stopper leading to the inner layer body, and an inner plug provided with an air inlet leading to the vent hole to the partition, and from the liquid inlet And a foam for allowing the content liquid to foam through the air from the air inlet, and a spout for pouring out the foamed content liquid, and containing the inner plug and the foam inside A double container comprising a pouring cap that surrounds the vent and is held on the peripheral wall of the mouth,
A cylindrical body that partitions between the liquid inlet and the air inlet and surrounds and holds the foam and is connected to the inner surface of the cylindrical body between the inner plug and the dispensing cap. The liquid inlet is closed while the liquid space is opened by pressurizing the storage space, and the air inlet is closed by connecting to the outer surface of the cylinder. An air valve body that opens the air inlet by pressurizing the internal space, and opens toward the side surface of the foam through the cylinder and allows air from the air inlet to pass therethrough. It is a double container provided with a check valve provided with an air outlet.

The liquid valve body has a column portion that extends through the through hole provided in the foam and extends toward the spout,
It is preferable to provide a lid body that covers the spout and is attached to the dispensing cap, and the lid body has a stopper that abuts on the column portion and prevents the liquid valve body from moving.

  The outer layer body preferably has a slit that closes when the internal space is at normal pressure, and opens when the internal space is depressurized to take outside air into the internal space.

  The pouring cap opens the outside air introduction hole leading to the vent and the outside air introduction hole when the outer layer body is in an upright posture, while the outside air body is open when the outer layer body is in a tilted posture. It is preferable to have a moving valve that closes the introduction hole.

  In the present invention, since the liquid valve body and the air valve body are connected to the cylindrical body, the flow back to the liquid inlet and the air inlet can be prevented by one member, so the structure is simpler. It becomes possible to become. Further, since the cylinder has a function of holding the foam, the structure can be further simplified.

  The liquid valve body has a pillar portion that extends through the through hole provided in the foam and extends toward the spout, and further includes a lid that covers the spout and is attached to the spout cap. When the lid is provided with a stopper that abuts on the column and prevents the liquid valve body from moving, the liquid valve body securely closes the liquid inlet by closing the lid, so that, for example, during transportation, etc. Unintentional dispensing of the content liquid can be prevented without complicating the structure.

  As a structure for taking in the outside air when the internal space is depressurized, a slit provided in the outer layer body, an outside air introduction hole provided in the extraction cap and a movement valve that opens and closes the outside air introduction hole are suitable. The case is particularly suitable because the number of parts can be reduced and the structure can be further simplified.

It is sectional drawing in the side view which shows one Embodiment of the double container according to this invention. It is sectional drawing which expands and shows the check valve for external air introduction | transduction provided in the outer-layer body about the modification of embodiment shown in FIG. It is sectional drawing in the side view which shows other embodiment of the double container according to this invention.

  Hereinafter, the present invention will be described more specifically with reference to the drawings. In this specification, claims, and abstract, “upper” refers to a pouring cap with respect to the bottom of the outer layer body in a posture (upright posture) in which the double container is placed on a horizontal surface. Is the side on which is located, and “below” is the opposite side.

  In FIG. 1, reference numeral 1A indicates a first embodiment of a double container according to the present invention. The double container 1A of the present embodiment includes an inner layer body 2, an outer layer body 3A, an inner stopper 4A, a check valve 5, a foam body 6, a dispensing cap 7A, and a lid body 8.

  The inner layer body 2 includes a storage space S for storing the content liquid and an upper opening 2a connected to the storage space S. The inner layer body 2 is made of a thin synthetic resin, and can be reduced in volume.

  The outer layer body 3A is formed by connecting a cylindrical mouth portion peripheral wall 3a to a body portion 3b having reversible flexibility and a bottom portion (not shown) for closing the lower end of the body portion 3b. An external thread 3c is provided on the outer peripheral surface of the mouth peripheral wall 3a. In addition, a through hole (vent hole) 3d for taking in air between the inner peripheral body 2 and the inner peripheral body 2 is provided in the mouth peripheral wall 3a. A groove portion 3e is provided to cut out the male screw portion 3c.

  The body portion 3b is provided with a slit 3f extending in the vertical direction. When the space (inner space N) formed between the inner layer body 2 and the outer layer body 3A is normal pressure (atmospheric pressure), the slit 3f is closed by the contact between the end surfaces of the slit 3f. However, when the internal space N is in a decompressed state, the end surfaces are slightly separated from each other, and the outside air can be taken into the internal space N. That is, the slit 3f functions as a check valve for introducing outside air. In the present embodiment, an adhesive band 3g extending in the vertical direction and partially joining the inner layer body 2 and the outer layer body 3A is provided (one or more may be provided), and the slit 3f is close to the adhesive band 3g. Therefore, the body 3b around the slit 3f is not easily deformed. Thereby, the malfunction which the end surfaces of the slit 3f remain separated can be prevented effectively. In this embodiment, the two slits 3f are provided with the adhesive band 3g interposed therebetween, but any number can be provided.

  Further, in place of the slit 3f, as shown in FIG. 2, the outer layer body 3A holds a check valve 3h for introducing the outside air that is tapered toward the inner layer body 2 and has a slit 3i at the tip thereof. You may let them.

  In the present embodiment, the inner layer body 2 and the outer layer body 3A are formed by stacking synthetic resins having low compatibility with each other so as to be peelable. Such an inner layer body 2 and the outer layer body 3A can be obtained by blow molding a parison in which the synthetic resin material of the inner layer body 2 and the synthetic resin material of the outer layer body 3A are laminated. Preparing a test tubular preform in which the synthetic resin material of the inner layer body 2 and the synthetic resin material of the outer layer body 3A are laminated, and forming the preform by biaxial stretch blow molding, or forming the outer layer body and the inner layer body May be formed separately, and then the inner layer body may be mounted in the outer layer body.

  The inner plug 4 </ b> A includes a plate-like partition wall 4 a that covers the upper opening 2 a of the inner layer body 2. The partition wall 4a is provided with a liquid inlet 4b penetrating the partition wall 4a at the center thereof. The partition wall 4a is provided with an annular recess 4c that surrounds the liquid inlet 4b and opens upward. Further, a cylindrical seal wall 4d is provided on the lower surface of the partition wall 4a so as to sandwich the inner layer body 2 between the inner surface of the peripheral wall 3a of the mouth. Further, an edge wall 4e extending upward is provided at the edge of the partition wall 4a, and a stepped portion 4f is provided at a connecting portion between the partition wall 4a and the edge wall 4e. Further, the step portion 4f is provided with an air inflow port 4g penetrating the step portion 4f in the radial direction.

  The check valve 5 includes a cylindrical body 5a, a disc-shaped liquid valve body 5c connected to the inner surface of the cylindrical body 5a via an elastic piece 5b, and a thin plate circle connected to the outer surface of the cylindrical body 5a. A plate-like air valve body 5d and a hole (air outlet) 5e penetrating the cylindrical body 5a in the radial direction above the air valve body 5d are provided. In addition, a columnar column portion 5f is provided on the liquid valve body 5c.

  The check valve 5 is positioned and held with respect to the partition wall 4a by inserting the lower portion of the cylindrical body 5a into the annular recess 4c. In this state, the liquid valve body 5c sits on the upper surface of the partition wall 4a, closes the liquid inlet 4b leading to the accommodation space S, and the outer peripheral end of the air valve body 5d sits on the upper surface of the step portion 4f. Then, the air inlet 4g leading to the internal space N is closed.

  The foam 6 is a porous body having a large number of gaps inside such as a sponge, a felt, and a sintered body. The foam 6 is cylindrical in this embodiment, and the outer peripheral surface thereof is fitted and held on the inner surface of the cylinder 5a. Moreover, the column part 5f is movably inserted in the through hole 6a provided in the center part.

  The dispensing cap 7A includes a cylindrical outer peripheral wall 7a and a flat plate-like top wall 7b that covers the upper portion of the outer peripheral wall 7a. Moreover, the internal thread part 7c corresponding to the external thread part 3c is provided in the inner surface of the outer peripheral wall 7a, and thereby the pouring cap 7A surrounds the vent 3d provided in the peripheral part wall 3a with the outer peripheral wall 7a. The lower inner surface of the outer peripheral wall 7a is held by the mouth peripheral wall 3a in a state where the lower inner surface is in airtight contact with the outer surface of the mouth peripheral wall 3a. In addition, you may make it hold | maintain by undercut instead of a screw | thread. In addition, a pouring cylinder 7d that protrudes while reducing the diameter upward is provided at the center of the top wall 7b, and a pouring outlet 7e for pouring the content liquid is provided at the tip of the pouring cylinder 7d. It has been.

  The inner stopper 4A and the check valve 5 incorporated in the dispensing cap 7A have the upper surface of the edge wall 4e in contact with the lower surface of the top wall 7b and the cylindrical body 5a in contact with the lower surface of the outlet 7e. It is held without being displaced upward. Further, on the inner side of the pouring cap 7A, a liquid chamber R1 (specifically, a space formed between the bottom wall of the foam 6 and the partition wall 4a inside the cylindrical body 5a) leading to the accommodation space S, and An air chamber R2 (specifically, a space formed between the outer peripheral wall 7a, the top wall 7b, and the partition wall 4a outside the cylindrical body 5a) is formed which communicates with the internal space N.

  The lid body 8 has a shape in which the central portion is bulged outward, and includes a top wall 8a that covers the top wall 7b. The top wall 8a is integrally connected to the outer peripheral wall 7a via a hinge 8b. The lid body 8 may be separated from the pouring cap 7A without providing the hinge 8b and attached to the pouring cap 7A with a screw or undercut. Further, on the back surface of the top wall 8a, there is provided a stopper 8c that comes into contact with the column portion 5f provided on the liquid valve body 5c when the lid body 8 is closed. Thereby, even if the inside of the storage space S may be pressurized with the lid 8 closed, the liquid inlet 4b is kept closed by the liquid valve body 5c, so that the content liquid is not prepared. Can be prevented. Although the stopper 8c of this embodiment is a rib-shaped thing protruded from the back surface of the top wall 8a, it is not limited to the shape of illustration. For example, the column portion 5f may be extended and brought into contact with the back surface of the top wall 8a so that the top wall 8a functions as a stopper.

  When the content liquid is poured out from the double container 1A having such a configuration, after opening the lid body 8, the outer layer body 3A is changed from an upright position to an inclined position, and the body portion 3b is pressed. . As a result, the accommodating space S is pressurized via the air in the internal space N, so that the liquid valve body 5c is separated from the upper surface of the partition wall 4a, and the liquid inlet 4b is opened. Along with this, the content liquid enters the liquid chamber R1 from the liquid inlet 4b, and is introduced into the foam 6 from the bottom wall of the foam 6 through a gap formed around the elastic piece 5b. At this time, as a result of pressurizing the internal space N, the air valve body 5d is separated from the upper surface of the stepped portion 4f, and the air inlet 4g is opened. Accordingly, the air in the internal space N reaches the air chamber R2 through the vent 3d, the groove 3e, and the air inlet 4g, and is introduced into the foam 6 from the side wall of the foam 6 through the air outlet 5e. Is done. Here, since the direction in which the content liquid flows in the foam 6 (from the lower side to the upper side) and the direction in which the air flows (from the outer side in the radial direction) are different, the content liquid and the air are more easily mixed in the foam 6. So you can fine-tune the texture of the foam. The foamed content liquid is poured out from the top wall of the foam 6 through the pouring cylinder 7d and from the pouring outlet 7e.

  After the content liquid has been poured out, the pressure on the body 3b of the outer layer body 3A is released. As a result, the inside of the storage space S returns to normal pressure, so that the liquid valve body 5c is seated on the upper surface of the partition wall 4a and the storage space S is closed. Further, since the outer layer body 3A tries to return to its original shape by its own restoring force, the inner space N is in a negative pressure state. Thereby, the air valve body 5d is seated on the upper surface of the stepped portion 4f and the air inlet 4g is closed, while the outside air is introduced into the internal space N through the slit 3f. Thus, only the outer layer body 3A can be restored while the inner layer body 2 is deformed and deformed. If the internal space N returns to normal pressure, the introduction of outside air from the slit 3f is also stopped.

  Next, another embodiment (double container 1B) of the double container according to the present invention will be described with reference to FIG. In addition, the site | part which has the same function as embodiment mentioned above attaches | subjects the same code | symbol, and abbreviate | omits description.

  The double container 1B includes an inner layer body 2, an outer layer body 3B, an inner plug 4B, a check valve 5, a foam 6, a dispensing cap 7B, and a lid 8.

  The outer layer body 3B is different from the outer layer body 3A in that the slit 3f is not provided.

  The inner plug 4B extends with respect to the inner plug 4A with the stepped portion 4f extending radially inward, and an annular wall 4h that is concentrically arranged with the edge wall 4e on the upper surface of the stepped portion 4f. Further, a communication port 4i communicating with the air inflow port 4g is provided between the annular wall 4h and the edge wall 4e.

  The pouring cap 7B is provided with an opening 7f communicating with the communication port 4i in the top wall 7b with respect to the pouring cap 7A, and a lower annular wall 7g for positioning the annular wall 4h on the lower surface of the top wall 7b. An upper annular wall 7h surrounding the opening 7f is provided on the upper surface. Furthermore, in this embodiment, a holder 9 is provided that is provided separately from the pouring cap 7B, is held by the upper annular wall 7h, has a diameter reduced upward, and has an outside air introduction hole 9a at its tip. Yes. In the holder 9, there is provided a moving valve 10 that is spherical in this embodiment. In the state where the outer layer body 3B is in the upright posture, a gap through which air passes is provided between the opening 7f and the moving valve 10.

  The double container 1B having such a configuration changes the posture of the outer layer body 3B from the upright posture to the tilted posture, so that the moving valve 10 moves and closes the outside air introduction hole 9a. Even so, the air in the internal space N does not leak from the outside air introduction hole 9a. As in the case of the double container 1A described above, the content liquid and air individually reach the foam 6, and the content liquid is mixed with air in the foam 6 to be foamed and poured out from the spout 7e. .

  After the content liquid is poured out, the pressure on the body 3b is released and the posture of the outer layer body 3B is changed to the original upright posture. Thereby, since the movement valve 10 moves to the original position and the outside air introduction hole 9a is opened, outside air can be taken into the internal space N through the outside air introduction hole 9a.

  The double container according to the present invention is not limited to these embodiments, and various modifications can be made within the scope according to the claims. For example, a columnar foam may be used without providing the column portion of the liquid valve. Moreover, you may provide the slit for external air introduction provided in the trunk | drum of an outer layer body in the bottom part of an outer layer body. Furthermore, the moving valve is not limited to a spherical shape, and may be a columnar shape or a weight shape.

  According to the present invention, it is possible to prevent the backflow of the content liquid remaining in the foam or the like, so that it is possible to provide a novel double container in which the foam quality is small and the structure can be further simplified. Become.

1A, 1B: Double container 2: Inner layer body 2a: Upper opening 3A, 3B: Outer layer body 3a: Portion peripheral wall 3b: Body part 3c: Male screw part 3d: Vent 3e: Groove part 3f: Slit 3g: Adhesive band 3h: Outside air introduction check valve 3i: slit 4A, 4B: inner plug 4a: partition wall 4b: liquid inlet 4c: annular recess 4d: seal wall 4e: edge wall 4f: step 4g: air inlet 4h: annular wall 4i: Communication port 5: Check valve 5a: Tube 5b: Elastic piece 5c: Liquid valve 5d: Air valve 5e: Air outlet 5f: Column 6: Foam 6a: Through-holes 7A, 7B: Pouring Cap 7a: Outer peripheral wall 7b: Top wall 7c: Female threaded portion 7d: Outlet tube 7e: Outlet 7f: Opening 7g: Lower annular wall 7h: Upper annular wall 8: Lid 8a: Top wall 8b: Hinge 8c: Stopper 9 : Holder 9a: Outside air introduction hole 10: Movement valve N: Internal space R1: Liquid chamber R2: Air S: housing space

Claims (4)

An inner layer body capable of volume reduction and deformation having a storage space for the content liquid, an outer layer body having a vent hole penetrating the peripheral wall of the mouth and forming an internal space between the inner layer body and the vent hole; and A partition wall covering the upper opening of the inner layer body, and an inner plug provided with a liquid inlet port leading to the inner layer body and an air inlet port leading to the vent hole in the partition wall; a content liquid from the liquid inlet port; A foam for allowing the content liquid to foam by passing air from the air inlet; and a spout for pouring the foamed content liquid; and storing the inner plug and the foam on the inside and A double container comprising a pouring cap that surrounds and is held on the peripheral wall of the mouth,
A cylindrical body that partitions between the liquid inlet and the air inlet and surrounds and holds the foam and is connected to the inner surface of the cylindrical body between the inner plug and the dispensing cap. The liquid inlet is closed while the liquid space is opened by pressurizing the storage space, and the air inlet is closed by connecting to the outer surface of the cylinder. An air valve body that opens the air inlet by pressurizing the internal space, and opens toward the side surface of the foam through the cylinder and allows air from the air inlet to pass therethrough. A double container provided with a check valve having an air outlet. The liquid valve body has a column portion that extends through the through hole provided in the foam and extends toward the spout,
2. The lid according to claim 1, further comprising a lid that covers the spout and is attached to the dispensing cap, and the lid includes a stopper that abuts on the column and prevents the liquid valve body from moving. Double container.   3. The double layer according to claim 1, wherein the outer layer body has a slit that closes when the internal space is at normal pressure, opens when the internal space is decompressed, and takes outside air into the internal space. 4. container.   The pouring cap opens the outside air introduction hole leading to the vent and the outside air introduction hole when the outer layer body is in an upright posture, while the outside air body is open when the outer layer body is in a tilted posture. The double container according to claim 1, further comprising a moving valve that closes the introduction hole.

Images