JP6165664B2 - Double container - Google Patents

Description

  The present invention includes a double volume-deformable inner layer body having a content liquid filling space and an outer layer body that accommodates the inner layer body therein, wherein only the inner layer body is reduced as the content liquid is poured out. It relates to the container.

  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. This type of double container normally closes the pouring opening leading to the filling space of the inner layer body inside the pouring cap attached to the mouth of the container, while pressing the outer layer body to fill the inner layer body filling space. When the pressure is increased, a check valve is provided to open the discharge opening and allow the content liquid to flow out, thereby preventing the outside air from entering the filling space.

  In such a double container, the non-return valve immediately closes the dispensing opening when the outer layer body is pressed and the content liquid is poured out from the dispensing cylinder of the dispensing cap and then the pressing to the outer layer body is stopped. The content liquid remains in the dispensing cylinder, and depending on the posture of the container, the content liquid may overflow (drip) from the dispensing cylinder. In addition, the lid for covering the dispensing cylinder during storage is provided with a seal portion that enters the dispensing cylinder and abuts the inner peripheral wall thereof to prevent outside air from entering the dispensing cylinder. Therefore, dripping may occur even when the lid is closed.

  As a double container for preventing such dripping, for example, a container having a suck back function (also referred to as a back suction function) as in Patent Document 1 is known. In the container of Patent Document 1, the partition provided at the upper part of the inner layer body is provided with a pouring opening that leads to the filling space and a cylindrical wall that opens at both ends, and in the cylindrical wall according to the change in the attitude of the container A moving spherical valve element (moving valve) is arranged. The check valve is provided with a valve body supported by an elastic arm with respect to an annular base, and the valve body is provided with a through hole that always communicates with the through path, and the valve body is seated on the partition wall. The dispensing opening is closed. According to such a double container, after the content liquid is poured out, the movable valve moves to the inner layer side by returning the tilted container to the standing posture, whereby the content liquid remaining in the dispensing cylinder is removed. Since it is pulled back into the cylindrical wall through the through hole of the valve body, dripping can be prevented.

JP 2013-151316 A

  By the way, when the content liquid is poured out from the double container of Patent Document 1, the content liquid flowing out from the dispensing opening flows into the dispensing cylinder through the through hole of the valve body, and between the base and the valve body. Since the liquid may flow into the dispensing cylinder through (around the elastic arm), the flow of the content liquid may be disturbed and the dispensing may not be performed in the intended amount or direction.

  An object of the present invention is to solve such a conventional problem, and an object of the present invention is to propose a new double container capable of stably pouring out the content liquid without disturbance. By the way.

The present invention includes a volume-deformable inner layer body having a content liquid filling space, an outer layer body having a mouth portion having an upper opening and containing the inner layer body therein, a pouring opening leading to the filling space, And a cylindrical wall forming an internal passage extending toward the filling space and having both ends opened, and an inner plug covering the upper opening, and being arranged in the internal passage along the cylindrical wall A moving valve that moves, a check valve that closes and opens the pouring opening, and a pouring cylinder that pours the content liquid out to the outside. A double container comprising a cap,
The inner plug includes a top wall provided with the extraction opening and the cylindrical wall, and a peripheral wall extending from an edge of the top wall toward the filling space,
The check valve is seated on the top wall and closes the pouring opening, while the check valve is separated from the top wall by pressurizing the filling space when the outer layer body is pressed. Equipped with a valve body to release
The valve body is a double container having a through hole that always communicates with the internal passage and an annular wall that slidably contacts the outer peripheral surface of the peripheral wall.

  It is preferable that an annular convex portion that protrudes radially inward is provided on the inner peripheral surface of the annular wall.

The inner plug is provided with the cylindrical wall at the central portion of the top wall and a plurality of the dispensing openings at equal intervals with respect to the cylindrical wall,
It is preferable that the valve body has the through hole immediately above the internal passage.

  It is preferable that the valve body includes a protrusion that contacts the moving valve moved to the valve body side and forms a gap between the valve body and the moving valve.

  Since the check valve body has a through hole that always leads to the internal passage where the transfer valve is placed, the content of the liquid is poured into the internal passage through the through hole. The liquid can be pulled back. In addition, since the annular wall provided on the valve body slidably contacts the outer peripheral surface of the peripheral wall of the inner plug, the liquid in the filling space can be fed from the through hole only to the dispensing cylinder. Liquid can be stably poured out without disturbance.

  In the case where an annular convex portion protruding radially inward is provided on the inner peripheral surface of the annular wall of the valve body, the sliding resistance of the annular wall can be suppressed as much as possible. Can be seated and separated smoothly. In addition, since the annular convex portion comes into local contact with the peripheral wall, the contact pressure between the annular convex portion and the peripheral wall is increased, and the sealing performance can be improved.

  The inner plug has a cylindrical wall at the center of the top wall, and a plurality of dispensing openings at equal distances from the cylindrical wall, and the valve body has a through hole directly above the internal passage. When doing, since the flow which goes to each through-hole from each pouring opening becomes equal, the contents liquid poured out from a pouring pipe can be poured out more disorderly.

  When the valve body is provided with a protrusion that forms a gap between the valve body and the moving valve by abutting when the moving valve moves to the valve body side, the through hole provided in the valve body is blocked by the moving valve. Therefore, the content liquid can be smoothly fed to the dispensing cylinder.

It is sectional drawing in the side view which shows one Embodiment of the double container according to this invention. FIG. 1A is a plan view of the check valve shown in FIG. 1, and FIG. 1B is a cross-sectional view taken along A-A shown in FIG. It is a figure which shows the state which pours out a content liquid from the double container shown in 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.

  In FIG. 1, the code | symbol 1 shows one Embodiment of the double container according to this invention. The double container 1 includes an inner layer body 10 that contains the content liquid, and an outer layer body 20 that houses the inner layer body 10 inside. Further, above the outer layer body 20, an inner plug 30, a check valve 40, a movement valve 50, a dispensing cap 60, and a lid body 70 are provided.

  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 includes a trunk portion 21 connected to a bottom portion (not shown), and a stepped cylindrical mouth portion 22 having a lower diameter larger than that of the upper portion is integrally connected to the trunk portion 21. The mouth portion 22 is provided with an upper opening 22 a that opens upward, and a male screw portion 22 b is provided on the outer peripheral surface of the mouth portion 22. Further, the mouth portion 22 is provided with a through-opening 23 for introducing air between the inner layer body 10 and the outer layer body 20, and further, on the outer peripheral surface of the mouth portion 22 where the through-opening 23 is located. A groove portion 24 is provided to cut out the male screw portion 22b in the vertical direction.

  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.

  In the present embodiment, the inner plug 30 has a disk-shaped top wall 31 extending in the horizontal direction, a cylindrical peripheral wall 32 extending from the edge of the top wall 31 toward the filling space S, and the peripheral wall 32. The upper wall 22, the peripheral wall 32, and the flange 33 cover the upper opening 22 a of the outer layer body 20. A cylindrical wall 34 extending toward the filling space S is provided at the center of the top wall 31. The cylindrical wall 34 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. Further, a reduced diameter portion 34a that narrows the inner diameter as it goes downward is provided below the cylindrical wall 34, and an opening portion 34b that opens toward the side is provided below the reduced diameter portion 34a. It has been. As a result, an internal passage N penetrating vertically is formed inside the cylindrical wall 34.

  The top wall 31 is provided with a pouring opening 35 that penetrates the top wall 31 and communicates with the filling space S on the radially outer side of the cylindrical wall 34. The four dispensing openings 35 of the present embodiment are provided at equal intervals with respect to the cylindrical wall 34 as shown by imaginary lines overlapping the check valve 40 shown in FIG. In the present embodiment, the intervals between the dispensing openings 35 are all equal.

  As shown in FIG. 1, on the radially outer side of the dispensing opening 35, there is provided an upwardly open annular recess 36 formed by a pair of annular walls arranged in a concentric double arrangement. An annular wall 37 that rises upward is provided on the outer side in the radial direction of the annular recess 36, and a notch 37 a is provided at the upper end of the annular wall 37. A groove 38 extending in the vertical direction is provided on the outer edge of the top wall 31. In addition, an annular seal wall 39 that is in contact with the outer layer body 20 with the inner layer body 10 interposed therebetween is provided on the lower surface of the top wall 31.

  The check valve 40 includes a fixed wall 41 that is fitted and held in the annular recess 36 of the inner plug 30. The fixed wall 41 of the present embodiment has a cylindrical shape as shown in FIG. 2, but may have a rectangular tube shape. Three elastic arms 42 each having an arc shape in the illustrated example are provided on the radially inner side of the fixed wall 41, and one end of each elastic arm 42 is integrally connected to the fixed wall 41. In addition, a disc-like valve body 43 is provided on the radially inner side of the elastic arm 42 and is integrally connected to the other end of each elastic arm 42. Further, in the central part of the valve body 43 (located directly above the internal passage N of the cylindrical wall 34), a protrusion 44 protruding downward, and in this embodiment, the protrusion 44 is centered as shown in FIG. Arc-shaped through-holes 45 arranged at equal intervals in the circumferential direction (four in this embodiment). Further, an annular wall 46 extending downward is provided at the edge of the valve body 43, and an annular convex portion 47 projecting radially inward is formed on the inner peripheral surface of the annular wall 46. Is provided. In the state where the check valve 40 is attached to the inner plug 30 as shown in FIG. 1, the valve body 43 is seated on the top wall 31 to close the outlet opening 35, and the annular wall 46 extends around the peripheral wall 32. The annular convex portion 47 is slidably in contact with the outer peripheral surface of the peripheral wall 32.

  The movement valve 50 is disposed in the internal passage N as shown in FIG. 1 and is provided so as to be movable along the cylindrical wall 34. The moving valve 50 of the present embodiment has a spherical shape, but various forms such as a solid columnar shape, a cylindrical shape and a closed wall inside thereof 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 34 a to close the internal passage N.

  As shown in FIG. 1, the dispensing cap 60 includes an outer peripheral wall 61 that surrounds the mouth portion 22 and is in airtight contact with the lower outer peripheral surface of the mouth portion 22. A female screw portion 61a corresponding to the portion 22b and a protrusion 61b that holds the inner plug 30 so as not to be pulled out before the pouring cap 60 is attached to the outer layer body 20 are provided. A top wall 62 that covers the inner plug 30 and the check valve 40 between the outer peripheral wall 61 and the outer peripheral wall 61 is provided at an upper portion of the outer peripheral wall 61. The top wall 62 stands upward and has an upper end. A pouring tube 63 is provided in which a lip is formed by curving the portion outward in the radial direction. In addition, a downwardly open annular recess 64 formed by a pair of concentric annular walls is provided on the lower surface of the top wall 62, and the fixed wall 41 is fitted and held by the annular recess 64. Yes. Further, an outside air introduction hole 65 penetrating the top wall 62 is provided on the radially outer side of the annular recess 64. As a result, the inside of the pouring cap 60 is located on the inner side in the radial direction of the fixed wall 41, and the communication that connects the pouring opening 35 and the pouring cylinder 63 when the valve body 43 is separated from the top wall 31. An annular space K that is located on the radially outer side of the fixed wall 41 and communicates the outside air introduction hole 65 with a path that leads from the through opening 23 of the outer layer body 20 to the notch 37a through the groove 24 and the groove 38. 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 63 and the outside air introduction hole 65 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 63 and seals the dispensing cylinder 63 when the lid 70 is closed. 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.

  When the content liquid is poured out from the double container 1 configured as described above, the lid 70 is opened as shown in FIG. 3, 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 35, and the valve body 43 is separated from the top wall 31. Here, since the annular wall 46 surrounding the peripheral wall 32 over the entire circumference is provided at the edge of the valve body 43, the content liquid flowing out from the dispensing opening 35 may flow to the elastic arm 42 side. Absent. For this reason, the content liquid can be fed from the through hole 45 only to the dispensing cylinder 63. In the present embodiment, as shown in FIG. 2B, the annular wall 46 is provided with an annular convex portion 47, and the sliding resistance of the valve body 43 with respect to the peripheral wall 32 can be reduced as much as possible. On the other hand, the valve body 43 can be smoothly seated and separated. Moreover, since the annular convex part 47 will contact | abut locally with respect to the surrounding wall 32, the sealing performance between the annular convex part 47 and the surrounding wall 32 improves, and the leak of a content liquid can be suppressed. . The valve body 43 separated from the top wall 31 can be prevented from excessive lifting of the valve body 43 by, for example, protruding ribs from the lower surface of the top wall 62 and contacting the upper surface of the valve body 43. it can. Further, the protrusion 43 is provided on the valve body 43, and even if the moving valve 50 moves to the valve body 43 side, it comes into contact with the protrusion 44, so that there is a gap between the valve body 43 and the moving valve 50. Can be formed. As a result, the through hole 45 provided in the valve body 43 is not blocked by the moving valve 50, so that the content liquid can be smoothly fed to the dispensing tube 63.

  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 35, so that the entry of outside air into the filling space S can be prevented. Further, since the outer layer body 20 tends to return to its original shape by its own restoring force, the inner layer body 10 and the outer layer body 20 are in a negative pressure state, whereby the outside air is passed from the outside air introduction hole 65 to the annular space. Since K is introduced into the through-opening 23 through the notch 37a, the groove part 38, and the groove part 24, the outer layer body 20 is restored while the inner layer body 10 is deformed and reduced.

  When the valve body 43 closes the pouring opening 35, the liquid contents remain in the pouring cylinder 63 and the communication space R. However, when the double container 1 is returned to the original standing posture, the moving valve 50 moves downward due to its own weight or pressure drop in the filling space S. As a result, a space corresponding to the movement of the moving valve 50 is formed above the internal passage N, so that the content liquid corresponding to this space is drawn back from the dispensing tube 63 and the communication space R. (Suck back function), and dripping can be effectively prevented. In addition, since the moving valve 50 moved downward is seated on the reduced diameter portion 34a of the cylindrical wall 34, the inside of the filling space S can be kept closed.

  The double container according to the present invention is not limited to the present embodiment, and various modifications are possible within the scope according to the claims. For example, the annular convex portion provided on the annular wall may be omitted, and the annular wall may be brought into direct contact with the peripheral wall. In this case, by appropriately selecting the inner diameter of the annular wall and the outer diameter of the peripheral wall, The wall can be slidably brought into contact with the peripheral wall. In addition, the number, shape, position, etc. of the outlet of the inner plug and the through hole of the check valve can be changed as appropriate.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the novel double container which can be poured out stably without being disturbed while providing a suck back function.

DESCRIPTION OF SYMBOLS 1 Double container 10 Inner layer body 20 Outer layer body 21 Body part 22 Portion part 22a Upper opening 22b Male screw part 23 Through opening 24 Groove part 30 Inner plug 31 Top wall 32 Perimeter wall 33 Flange 34 Cylindrical wall 34a Reduced diameter part 34b Opening part 35 Note Exit opening 36 Annular recess 37 Annular wall 37a Notch 38 Groove 39 Seal wall 40 Check valve 41 Fixed wall 42 Elastic arm 43 Valve body 44 Protrusion 45 Through hole 46 Annular wall 47 Annular convex 50 Moving valve 60 Outlet cap 61 Outer circumference Wall 61a Female thread portion 61b Projection 62 Top wall 63 Outlet tube 64 Annular recess 65 Outside air introduction hole 70 Lid body 71 Hinge 72 Upper wall 73 Lid body peripheral wall 74 Sealing portion K Annular space N Internal passage R Communication space S Filling space

Claims (4)

A volume-deformable inner layer body having a filling space for the content liquid, an outer layer body having a mouth portion having an upper opening and containing the inner layer body therein, a pouring opening leading to the filling space, and the filling space An internal plug covering the upper opening, and a movable valve disposed along the internal wall and moving along the cylindrical wall A check valve that closes and opens the pouring opening, and a pouring cap that has a pouring cylinder for pouring the content liquid to the outside and covers the check valve and is attached to the mouth. In the double container provided,
The inner plug includes a top wall provided with the extraction opening and the cylindrical wall, and a peripheral wall extending from an edge of the top wall toward the filling space,
The check valve is seated on the top wall and closes the pouring opening, while the check valve is separated from the top wall by pressurizing the filling space when the outer layer body is pressed. Equipped with a valve body to release
The said valve body is a double container which has the through-hole always connected to the said internal channel | path, and the cyclic | annular wall which contact | abuts to the outer peripheral surface of the said surrounding wall so that sliding is possible.   The double container according to claim 1, further comprising an annular convex portion projecting radially inward on an inner peripheral surface of the annular wall. The inner plug is provided with the cylindrical wall at the central portion of the top wall and a plurality of the dispensing openings at equal intervals with respect to the cylindrical wall,
The double container according to claim 1 or 2, wherein the valve body has the through hole immediately above the internal passage.   The said valve body is equipped with the processus | protrusion which contact | abuts to the said movement valve which moved to this valve body side, and forms a clearance gap between this valve body and this movement valve. Heavy container.

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