JP2015227175A - Double container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double container capable of ensuring liquid-tightness without affecting sealing performance even when a wound or the like occurs at a position in the vicinity of an upper opening of an inner peripheral surface of a mouth peripheral wall.SOLUTION: A double container (1) includes an inner layer body (10), an outer layer body (20), an inside plug (30), and an extraction cap (60). A cylindrical seal wall (37) that enters from an upper opening (22a) to the inside of a mouth peripheral wall (22) is disposed on a lower surface of a top wall (31). An inner peripheral surface of the mouth peripheral wall (22) includes: a cylindrical seal part (26a) pressed against an outer peripheral surface of the seal wall (37) with the inner layer body (10) interposed therebetween; and an enlarged diameter part (26b) extending from the seal part (26a) to the upper opening (22a) and having a larger inner diameter than the seal part (26a). The enlarged diameter part (26b) includes a cylindrical part (26b1) having a larger inner diameter than the seal part (26a).

Description

  The present invention relates to a double container, and in particular, includes a volume-deformable inner layer body having a filling space for the content liquid, and an outer layer body for accommodating the inner layer body inside thereof, and the inner layer body as the content liquid is poured out. It is only related to double containers that reduce volume.

  As a container for receiving cosmetics such as lotion, shampoo, rinse, liquid soap, food seasoning or chemicals, an inner layer body that accommodates such liquids and can be reduced in volume and deformed, and this inner layer A double container (also referred to as a delamination container or a delamination container) including an outer layer body that contains the body inside is known. As such a double container, for example, in Patent Document 1, by pressing the body portion of the outer layer body, the inner layer body is pressed through the air between the outer layer body and the inner layer body, and the content liquid is poured out. A squeeze-type container is shown.

JP 2014-028642 A

  In the double container disclosed in Patent Document 1, the entire upper end portion of the inner peripheral surface of the mouth peripheral wall including the upper opening of the mouth peripheral wall of the outer layer body is in close contact with the seal tube of the inner plug through the inner layer body, Designed to form a seal.

  By the way, the container comprised by an inner layer body and an outer layer body may be conveyed to another place, without the cap being mounted | worn with a mouth after the shaping | molding. In such a case, the molded container is once packed in a box, loaded into an automobile or the like, transported to another location, and then unpacked to be filled with the content liquid.

  A container with no cap attached to the mouth may be damaged at a position near the upper opening on the inner peripheral surface of the mouth peripheral wall, for example, when the mouth collides with each other during packing, transportation, or unpacking. Or the inner layer may peel or deform at that portion. Therefore, like the double container disclosed in Patent Document 1, the entire upper end portion of the inner peripheral surface of the mouth peripheral wall is designed to be in close contact with the sealing tube of the inner plug via the inner layer body to form a seal portion. If this is the case, the sealing performance may vary due to unexpected scratches on the inner peripheral surface or peeling / deformation of the inner layer body.

  The object of the present invention is to ensure liquid-tightness without affecting the sealing performance even if scratches or peeling / deformation of the inner layer body occurs in the vicinity of the upper opening on the inner peripheral surface of the mouth peripheral wall. It is to provide a double container capable of doing.

  The double container according to the first aspect of the present invention comprises a volume-deformable inner layer body having a filling space for the content liquid, and the inner layer from the through-opening provided in the peripheral wall of the mouth while accommodating the inner layer body inside thereof. An outer layer body that introduces air between the body, a top wall that covers an upper opening of the peripheral wall of the mouth, and an inner plug that includes a pouring opening that leads to the filling space in the top wall, and the pouring A dispensing cylinder that pours the content liquid through the opening, an outside air introduction hole that communicates with the outside, and a dispensing cap that has an outer peripheral wall attached to the peripheral wall of the mouth and holds the inner plug inside. In the heavy container, a lower surface of the top wall is provided with a cylindrical sealing wall that enters the inside of the mouth peripheral wall from the upper opening, and the inner peripheral surface of the mouth peripheral wall is the inner layer body. A cylindrical seal portion pressed against the outer peripheral surface of the seal wall via Extending from the upper opening to the upper opening and having a larger diameter portion than the seal portion, and the larger diameter portion includes a cylindrical portion having a larger inner diameter than the seal portion. is there.

  As one embodiment of the present invention, it is preferable that the enlarged-diameter portion includes a truncated cone portion that connects the seal portion and the cylindrical portion and whose inner diameter gradually increases toward the upper opening side.

  As one embodiment of the present invention, when the truncated cone part is a first truncated cone part, the enlarged diameter part connects the cylindrical part and the upper opening, and the inner diameter increases toward the upper opening side. It is preferable to provide the 2nd truncated cone part which increases gradually.

  According to the present invention, liquid tightness is ensured without affecting the sealing performance even if scratches or peeling / deformation of the inner layer body occurs in the vicinity of the upper opening on the inner peripheral surface of the mouth peripheral wall. A double container that can be provided can be provided.

It is sectional drawing which shows the double container which is one Embodiment of this invention. It is the expanded sectional view which expanded a part of FIG.

  Hereinafter, the present invention will be described more specifically with reference to the drawings. In this specification, claims and abstract, “upper” means the side where the pouring cap is located with respect to the outer layer body when the double container is placed on a horizontal plane, "Is the opposite side.

  FIG. 1 is a view showing a double container 1 as an embodiment of the double container according to the present invention. The double container 1 includes an inner layer body 10 that contains the content liquid, an outer layer body 20 that houses the inner layer body 10 inside, an inner plug 30, a check valve 40, a moving valve 50, a dispensing cap 60, and a lid body 70. .

  The inner layer body 10 includes a filling space S for containing the content liquid therein. The inner layer body 10 is made of a thin synthetic resin and can be deformed by volume reduction.

  The outer layer body 20 is positioned between a trunk portion 21 connected to a bottom portion (not shown), a stepped cylindrical mouth peripheral wall 22 having a lower diameter larger than the upper portion, and the trunk portion 21 and the mouth peripheral wall 22. And a shoulder portion 25 connecting the trunk portion 21 and the mouth peripheral wall 22. The mouth peripheral wall 22 has a small-diameter portion 26 located at the upper portion and a large-diameter portion 27 located at the lower portion. The small-diameter portion 26 of the mouth peripheral wall 22 is provided with an upper opening 22a that opens upward. ing. A male screw portion 22 b is provided on the outer peripheral surface of the small diameter portion 26 of the mouth portion peripheral wall 22. The mouth peripheral wall 22 is provided with a through-opening 23 for introducing air between the inner layer body 10 and the outer layer body 20, and a small diameter portion of the mouth peripheral wall 22 where the through-opening 23 is located. On the outer peripheral surface of 26, a groove portion 24 is provided to cut out the male screw portion 22b in the vertical direction. The inner layer body 10 extends to the position of the upper end surface 28 of the mouth peripheral wall 22, and the upper end portion 11 of the inner layer body 10 is laminated on the upper end surface 28.

  In this embodiment, the inner layer body 10 and the outer layer body 20 are obtained by laminating synthetic resins having low compatibility with each other so as to be peelable, and blow molding a parison formed by laminating these synthetic resin materials. It was obtained by. In addition to blow molding, a preform formed into a test tube is biaxially stretch blow molded, or an outer layer body and an inner layer body are individually formed, and then the inner layer body is mounted in the outer layer body. It may be used. Although not shown, one or a plurality of adhesive bands that extend in the vertical direction between the inner layer body 10 and the outer layer body 20 and partially join the inner layer body 10 and the outer layer body 20 to each other. May be provided.

  The inner plug 30 has a top wall 31 that covers the upper opening 22 a of the outer layer body 20. In the present embodiment, the top wall 31 is provided with a cylindrical wall 32 that penetrates the top and bottom and extends toward the filling space S. The cylindrical wall 32 of the present embodiment is a cylindrical shape in which the cross-sectional shape of the inner peripheral surface is a circle, but is a rectangular tube shape in which the cross-sectional shape of the inner peripheral surface is a polygon such as a quadrangle or a hexagon. It may be a thing. The cylindrical wall 32 is provided with a reduced diameter portion 32a that narrows the inner diameter as it goes downward. The top wall 31 is provided with a stepped portion 33 that protrudes upward adjacent to the cylindrical wall 32, and the stepped portion 33 is provided with a pouring opening 34 that penetrates the front and back. In addition, an annular fitting wall 35 is provided on the top surface of the top wall 31 so as to surround the cylindrical wall 32 and the stepped portion 33 and to fit and hold the check valve 40 therebetween. Furthermore, a cylindrical inner peripheral wall 36 that stands from the edge of the top wall 31 is provided on the radially outer side of the fitting wall 35. A cylindrical seal wall 37 is provided on the lower surface of the top wall 31 so as to enter the inside of the mouth peripheral wall 22 from the upper opening 22a and to contact the inner peripheral surface of the mouth peripheral wall 22 with the inner layer body 10 interposed therebetween. . Further, as shown in FIG. 1, an opening 38 is provided in the lower portion of the inner peripheral wall 36. Further, as shown in FIG. 1, an annular lower surface portion 39 that is adjacent to the seal wall 37 on the outer side in the radial direction contacts the upper end surface 28 of the mouth peripheral wall 22 via the upper end portion 11 of the inner layer body 10. ing. The annular lower surface portion 39 and the upper end surface 28 are flat surfaces extending in a direction orthogonal to the central axis O direction of the mouth peripheral wall 22.

  The lower portion of the check valve 40 includes an annular wall 41 fitted and held on the cylindrical wall 32, the stepped portion 33, and the fitting wall 35 of the inner plug 30. On the radially inner side of the annular wall 41, a plate-like valve body 43 connected via an elastic arm 42 is provided, and the dispensing opening 34 is closed by the valve body 43. Further, the valve element 43 also covers most of the upper opening of the cylindrical wall 32, but a part of the valve element 43 is always open. Outside the annular wall 41 in the radial direction, the external air introduction hole 66 of the dispensing cap 60 is closed when pressurizing the filling space S accompanying the pressing of the outer layer body 20, and the outer layer body 20 after the pressurization is closed. A valve body 44 for the outside air introduction hole 66 that opens the outside air introduction hole 66 at the time of restoration is provided, and the valve body 44 is integrally connected to the annular wall 41. In the present embodiment, the check valve 40 is in the form of a so-called three-point valve, but other check valves in other forms such as a one-point valve can be used. In the present embodiment, the annular wall 41 has a cylindrical shape, but may have a rectangular tube shape. Furthermore, although the valve body 44 of this embodiment is formed integrally with the annular wall 41, it may be formed separately from the annular wall 41.

  The movement valve 50 is disposed in the cylindrical wall 32 and is provided so as to be movable along the inner peripheral surface thereof. The moving valve 50 of the present embodiment has a spherical shape, but has various shapes such as a solid columnar shape, a cylindrical shape, and a closed wall that closes an internal passage formed inside thereof. Forms can be used. As shown in FIG. 1, when the double container 1 is placed in the standing posture, the moving valve 50 is seated on the reduced diameter portion 32a so as to close the filling space S.

  The dispensing cap 60 includes an outer peripheral wall 61 surrounding the mouth peripheral wall 22, and an inner thread surface 62 corresponding to the male thread 22 b of the mouth peripheral wall 22 is provided on the inner peripheral surface of the outer peripheral wall 61. Further, the inner plug 30 is fitted inside the outer peripheral wall 61. Specifically, the inner plug 30 has an inner peripheral wall 36 that passes over a convex portion formed at a position above the position where the female screw portion 62 is formed on the inner peripheral surface of the outer peripheral wall 61. The output cap 60 is held undercut. A top wall 63 that covers the inner plug 30 and the check valve 40 is provided on the upper portion of the outer peripheral wall 61. The top wall 63 is provided with a dispensing cylinder 64 for dispensing the content liquid in the filling space S under the opening of the check valve 40. Note that the dispensing cylinder 64 also extends to the lower side of the top wall 63, thereby functioning as a stopper when the valve body 43 is excessively lifted. In addition, a pair of upper fitting walls 65 having a concentric double arrangement for fitting and holding the upper portion of the annular wall 41 of the check valve 40 are provided on the lower surface of the top wall 63. Furthermore, an outside air introduction hole 66 that penetrates the top wall 63 is provided on the radially outer side of the upper fitting wall 65. Thus, the space between the dispensing cylinder 64 and the outside air introduction hole 66 is partitioned by the annular wall 41, and an internal space N in which the outside air introduction hole 66 is opened is formed on the radially outer side of the annular wall 41. In addition, the valve body 44 described above is located in the internal space N, and the opening and closing of the outside air introduction hole 66 are switched by the valve body 44.

  Further, the internal space N and the groove portion 24 located between the outer peripheral wall 61 and the mouth peripheral wall 22 communicate with each other through the opening 38. That is, on the inner side of the pouring cap 60, an internal space N, an opening 38, and a groove 24 are formed in order from the outside air introduction hole 66 as a passage through which outside air flows between the inner layer body 10 and the outer layer body 20 from the outside. Thus, an outside air introduction path T reaching the through opening 23 is formed.

  The lid body 70 is connected to the outer peripheral wall 61 of the pouring cap 60 via a hinge 71, and can be covered with the pouring cylinder 64 and the outside air introduction hole 66 by being bent by the hinge 71. More specifically, the lid 70 includes a flat upper wall 72 and a lid peripheral wall 73 that is connected to the edge of the upper wall 72 and is continuous with the outer peripheral wall 61. Is provided with a rod-shaped seal portion 74 that enters the inside of the dispensing cylinder 64 and seals the dispensing cylinder 64 when the lid 70 is closed. The lid peripheral wall 73 is attached to the dispensing cap 60 so that the edge of the top 63 is fitted inside the lid peripheral wall 73. The lid body 70 may be a separate body from the pouring cap 60 without providing the hinge 71, and may be configured to be attached to the pouring cap 60 with screws or undercuts.

  In discharging the content liquid from the double container 1 configured as described above, the lid 70 is removed, and the posture of the double container 1 is changed from the standing posture to the tilted or inverted posture. When the body portion 21 of the outer layer body 20 is pressed, the inner layer body 10 is pressed from the outer layer body 20 directly or via the air between the inner layer body 10 and the outer layer body 20 to pressurize the filling space S. The Thereby, the pressurized content liquid pushes up the valve body 43 from the dispensing opening 34, the content liquid flows out from the dispensing opening 34, and is poured out to the outside through the dispensing cylinder 64. The outside air introduction path T is always closed by the valve body 44 during this series of operations. In this state, the moving valve 50 in the cylindrical wall 32 is moved toward the dispensing cylinder 64 (position indicated by a broken line in FIG. 1) due to its own weight or the content liquid flowing in from the opening on the lower side of the cylindrical wall 32. Has moved.

  After the required amount of content liquid has been poured out, the pressure on the body portion 21 of the outer layer body 20 is released. As a result, the pressure in the filling space S is lowered, and the valve body 43 closes the dispensing opening 34, so that outside air can be prevented from entering the filling space S. Further, the outer layer body 20 tries to return to its original shape by its own restoring force, and since the mutual pressure between the inner layer body 10 and the outer layer body 20 becomes a negative pressure state, the valve body 44 is pushed down and the outside air introduction hole 66 is pressed. Is opened, and outside air is introduced through the outside air introduction path T. Thereby, only the outer layer body 20 is restored while the volume of the inner layer body 10 is reduced.

  When the valve body 43 closes the dispensing opening 34, the content liquid remains in the dispensing cylinder 64. However, when the double container 1 is returned to the original standing posture, the moving valve 50 It moves downward due to its own weight or a pressure drop in the filling space S. As a result, a space corresponding to the amount of movement of the movement valve 50 is formed above the cylindrical wall 32, so that the content liquid corresponding to this space can be pulled back from the dispensing cylinder 64 ( Suckback function) and dripping can be effectively prevented. In addition, since the moving valve 50 moved downward is seated on the reduced diameter portion 32a of the cylindrical wall 32, the inside of the filling space S can be kept closed.

  Here, the outer peripheral surface of the large-diameter portion 27 of the mouth peripheral wall 22 and the inner peripheral surface of the outer peripheral wall 61 are in contact with each other at a position below the through opening 23 to close the lower end of the outside air introduction path T. A seal portion 80 is formed. More specifically, the seal portion 80 is an annular protrusion formed at a position below the position where the female thread portion 62 is formed on the inner peripheral surface of the outer peripheral wall 61 with respect to the outer peripheral surface of the large diameter portion 27. It is formed by bringing the part into airtight contact. The seal portion 80 may have a configuration in which an annular convex portion is provided on the outer peripheral surface of the large diameter portion 27. Moreover, for example, the seal portion may be formed by fitting the outer peripheral surface of the mouth peripheral wall and the inner peripheral surface of the outer peripheral wall so as to be in close contact with each other.

  FIG. 2 is an enlarged cross-sectional view in which the vicinity of the upper opening 22a in FIG. 1 is enlarged. As shown in FIG. 2, the inner peripheral surface of the small-diameter portion 26 of the mouth peripheral wall 22 includes a cylindrical seal portion 26 a that is pressed against the outer peripheral surface of the seal wall 37 via the inner layer body 10, and the seal portion 26 a. An enlarged diameter portion 26b extending to the upper opening 22a and having a larger inner diameter than the seal portion 26a is provided. The inner layer body 10 and the inner plug 30 are liquid-tightly connected by the seal portion 26a. The enlarged-diameter portion 26b includes a cylindrical portion 26b1 having an inner diameter larger than that of the seal portion 26a. Unlike the seal portion 26a, the cylindrical portion 26b1 is pressed against the outer peripheral surface of the seal wall 37 via the inner layer body 10. Absent. That is, the cylindrical portion 26b1 is not in contact with the seal wall 37 via the inner layer body 10 in a state where the seal portion 26a is in contact with the seal wall 37 via the inner layer body 10, and the inner layer body 10 and the cylindrical portion are not in contact with each other. An air gap is formed between 26b1.

  As described above, the cylindrical seal portion 26a pressed against the outer peripheral surface of the seal wall 37 through the inner layer body 10 is not provided in the vicinity of the upper opening 22a, and a diameter-enlarged portion is provided in the vicinity of the upper opening 22a. 26b is provided, and the cylindrical portion 26b1 that is not pressed against the outer peripheral surface of the seal wall 37 via the inner layer body 10 is disposed, so that the cylindrical portion 26b1 located near the upper opening 22a on the inner peripheral surface of the mouth peripheral wall 22 is scratched. And the like does not affect the sealing performance of the seal portion 26a. Therefore, it is possible to design to ensure stable liquid tightness without being affected by the presence or absence of scratches in the vicinity of the upper opening 22a of the inner peripheral surface of the mouth peripheral wall 22 or the presence or absence of peeling / deformation of the inner layer body 10. It becomes.

  Further, the enlarged diameter portion 26b connects the seal portion 26a and the cylindrical portion 26b1, and connects the first truncated cone portion 26b2 whose inner diameter gradually increases toward the upper opening 22a side, and the cylindrical portion 26b1 and the upper opening 22a. And a second truncated cone portion 26b3 whose inner diameter gradually increases toward the upper opening 22a side. That is, the inner peripheral surface of the small-diameter portion 26 of the mouth peripheral wall 22 is formed from the cylindrical seal portion 26a toward the upper opening 22a, the first truncated cone portion 26b2, the cylindrical portion 26b1, the second truncated cone portion 26b3, and the upper opening. They are arranged in the order of 22a. The inner diameter at the position of the upper opening 22a has the largest inner diameter at the enlarged diameter portion 26b.

  Compared with a configuration in which the upper end of the seal portion 26a and the lower end of the cylindrical portion 26b1 are connected by a first truncated cone portion 26b2, so that the upper end of the seal portion 26a and the lower end of the cylindrical portion 26b1 are directly connected by a right-angled step. Thus, the local pressure applied to the edge of the step is relieved, and the inner layer body 10 and the inner peripheral surface of the mouth peripheral wall 22 are suppressed from being damaged via the inner layer body 10. Further, by connecting the upper opening 22a and the upper end of the cylindrical portion 26b1 with the second truncated cone portion 26b3, when the seal wall 37 is inserted from the upper opening 22a to the inside of the mouth peripheral wall 22, the second Since the truncated cone part 26b3 serves as a guide, the insertion property of the seal part 37 can be improved.

  The present invention relates to a double container, and in particular, includes a volume-deformable inner layer body having a filling space for the content liquid, and an outer layer body for accommodating the inner layer body inside thereof, and the inner layer body as the content liquid is poured out. It is only related to double containers that reduce volume.

1: Double container 10: Inner layer body 11: Upper end portion 20: Outer layer body 21: Body portion 22: Mouth peripheral wall 22a: Upper opening 22b: Male screw portion 23: Through opening 24: Groove portion 25: Shoulder portion 26: Small diameter portion 26a : Seal portion 26b: Expanded diameter portion 26b1: Cylindrical portion 26b2: First truncated cone portion (conical truncated cone portion)
26b3: second truncated cone part (conical truncated part)
27: Large diameter portion 28: Upper end surface 30: Inner plug 31: Top wall 32: Cylindrical wall 32a: Reduced diameter portion 33: Stepped portion 34: Outlet opening 35: Fitting wall 36: Inner peripheral wall 37: Seal wall 38 : Opening 39: Annular lower surface portion 40: Check valve 41: Annular wall 42: Elastic arm 43: Valve body 44: Valve body 50: Moving valve 60: Dispensing cap 61: Outer peripheral wall 62: Female thread portion 63: Top wall 64: Dispensing cylinder 65: Upper fitting wall 66: Outside air introduction hole 70: Lid 71: Hinge 72: Upper wall 73: Lid peripheral wall 74: Seal part 80: Seal part N: Internal space O: Mouth part of peripheral wall Central axis S: Filling space T: Outside air introduction path

Claims (3)

A volume-deformable inner layer body having a content liquid filling space, and an outer layer body that houses the inner layer body therein and introduces air between the inner layer body from a through opening provided in a peripheral wall of the mouth; and A top wall that covers the upper opening of the peripheral wall of the mouth, an inner plug provided with a pouring opening that leads to the filling space in the top wall, a pouring cylinder that pours the content liquid through the pouring opening, and the outside A double container comprising: an outside air introduction hole that communicates; and an outer peripheral wall that is mounted on the peripheral wall of the mouth, and a pouring cap that holds the inner plug inside,
On the lower surface of the top wall, a cylindrical seal wall that enters the inside of the mouth peripheral wall from the upper opening is provided,
The inner peripheral surface of the mouth peripheral wall extends from the seal portion to the upper opening, the cylindrical seal portion pressed against the outer peripheral surface of the seal wall via the inner layer body, and more than the seal portion. An enlarged diameter portion having a large inner diameter,
The double diameter container is characterized in that the enlarged diameter portion includes a cylindrical portion having an inner diameter larger than that of the seal portion.   2. The double container according to claim 1, wherein the enlarged-diameter portion includes a truncated cone portion that connects the seal portion and the cylindrical portion and gradually increases in inner diameter toward the upper opening side.   When the truncated cone part is the first truncated cone part, the enlarged diameter part connects the cylindrical part and the upper opening, and a second truncated cone part whose inner diameter gradually increases toward the upper opening side. The double container according to claim 2, wherein the double container is provided.

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