JP2015127215A - Double container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double container capable of suppressing the stagnation of granular matters in a content fluid between a non-return valve and an inner plug, thereby suppressing the intrusion of outside air into a filling space and the dripping of the content fluid from a dispensing part during the release of squeeze.SOLUTION: A double container 10 comprises: a fluid flow path 43 provided on a top wall 41 covering an upper opening 31 and connected to a filling space S; an inner plug 40 for defining a circulation space Nof a content fluid between the fluid flow path 43 and a dispensing part 74 in cooperation with a dispensing plug 70; and a content fluid non-return valve 50 disposed inside the circulation space N. The content fluid non-return valve 50 is provided with: an opening/closing wall part 52 which moves to the dispensing part 74 side by inverting the double container 10, allows the content fluid from the fluid flow path 43 to pass through by the application of pressure to the filling space S due to the pressure on an outer layer body 20, and comes into contact with the top wall 41 while moving to the fluid flow path 43 side by inverting the double container 10, and in which a penetration part 53 preventing the passage of outside air from the dispensing part 74 is formed; and a sliding cylindrical part 51 connected to the opening/closing wall part 52 and guided slidably inside the circulation space N.

Description

  The present invention relates to a double container including an outer layer body that forms an outer shell of a container and an inner layer body that is housed inside the outer layer body and is capable of volume reduction and deformation. Suppress the accumulation of particulate matter in the contents liquid between the inside and inside plugs, thereby preventing the entry of outside air into the filling space of the contents liquid and also preventing the occurrence of liquid dripping from the dispensing part. It is what.

  As a container for storing cosmetics such as lotion, shampoo, rinse, liquid soap, food seasoning, etc., an outer layer body that forms an outer shell of the container and has a through-hole leading to the inside and outside, and an outer layer body An inner layer body that is housed inside and is capable of volumetric deformation and a pouring stopper that is attached to the mouth of the outer layer body and has an outside air introduction hole that communicates with a through hole of the outer layer body, and injects the content liquid from the pouring stopper. A double container (also referred to as a delamination container) in which only the inner layer body is reduced in volume as it is discharged is known. Moreover, as such a double container, the body part of the outer layer body is pressed (also referred to as squeeze), thereby pressing the inner layer body through the air between the outer layer body and the inner layer body, and dispensing the content liquid. A squeeze-type container is known.

  As such a squeeze-type double container, for example, Patent Document 1 discloses a liquid flow path connected to the filling space on the top opening of the inner layer body that leads to the filling space for the content liquid, and on the top wall that covers the upper opening. In the figure, the inner plug formed is mounted and a check valve is provided in the liquid flow path of the inner plug. The check valve is a three-point valve having three elastic arms, one end of which is fixed to the upper surface of the inner plug (that is, the surface on the dispensing portion side) and the other end connected to the outer peripheral edge of the valve body. It is configured. According to such a three-point valve, at the time of squeezing, the liquid flow path is opened in the valve body to allow the content liquid to be poured out. On the other hand, when squeezing is released, the liquid flow path is closed at the valve body to fill the filling space. Can prevent the outside air from entering. Further, when the squeeze is released, the valve body is drawn into the filling space side, so that the content liquid is sucked into the filling space side (also referred to as suck back), and the occurrence of liquid dripping from the dispensing portion is suppressed.

JP 2011-31921 A

  However, in the double container as described in Patent Document 1, in the case of containing a granular material such as a bowl, for example, when a sauce or the like is used as the content liquid, at the time of releasing the squeeze, the granular material in the content liquid has 3 points. As a result of being trapped between the lower surface near one end (fixed end) of the elastic arm of the valve and the upper surface of the top wall of the inner plug, the liquid passage by the valve body is prevented from being closed, and the filling into the filling space is prevented. There was a risk of allowing outside air to enter.

  The present invention has been developed in view of such a situation, and suppresses the accumulation of particulate matter in the content liquid between the check valve and the inner stopper, thereby preventing the entry of outside air into the filling space. It aims at providing the double container which can suppress generation | occurrence | production of the liquid dripping from the extraction part at the time of cancellation | release of a squeeze while it can suppress.

That is, the gist configuration of the present invention is as follows.
1. An outer layer body having a through hole in the peripheral wall of the mouth and forming an outer shell of the container;
An inner layer body that has an upper opening that leads to a filling space of the content liquid and that is housed inside the outer layer body and is volume-reduced and deformed by air introduced between the through hole and the outer layer body;
It has an outer peripheral wall mounted on the peripheral wall of the mouth, a top wall connected to the outer peripheral wall has a pouring part for pouring the liquid content from the filling space, and an outside air introduction hole leading to the through hole In a double container with a spout,
The top wall covering the upper opening has a liquid flow path connected to the filling space, and cooperates with the discharge plug to partition a flow space for the content liquid between the liquid flow path and the extraction portion. A plug,
A content valve check valve disposed in the circulation space,
The content liquid check valve moves to the extraction portion side by inverting the double container, and from the liquid flow path by pressurization to the filling space accompanying the pressing to the outer layer body While passing the content liquid, the penetrating portion is formed so as to move to the liquid flow path side and come into contact with the top wall, thereby forming a through portion that prevents passage of outside air from the extraction portion. A double container comprising: an openable / closable wall portion; and a sliding cylinder portion that is connected to the open / close wall portion and is slidably guided in the circulation space.

2. The double container according to 1 above, wherein the penetrating portion of the content liquid check valve is a slit.

3. The inner plug cooperates with the pouring plug to define an annular ventilation space that allows the outside air introduction hole to communicate with the through hole around the circulation space.
The double container according to 1 or 2, wherein an air check valve is provided in the ventilation space to allow air from the outside air introduction hole to pass therethrough while preventing air from passing through the outside air introduction hole.

4). The inner plug cooperates with the pouring plug to define an annular ventilation space that allows the outside air introduction hole to communicate with the through hole around the circulation space.
The double container according to 1 or 2, wherein a throttle part for restricting an air flow is provided between the ventilation space and the through hole.

  According to the present invention, by inverting the double container, the sliding cylinder part of the check valve for the content liquid is slid in the circulation space, and the open / close wall part connected to the sliding cylinder part is in the circulation space. The content liquid from the liquid flow path can be discharged from the pouring part through the penetrating part of the opening and closing wall part by pressing the outer layer body and pressurizing the filling space. On the other hand, by raising the double container, the open / close wall portion is moved to the liquid flow path side in the circulation space and brought into contact with the top wall, thereby preventing outside air from the extraction portion from passing through the penetration portion. Thus, while preventing the entry of the outside air into the filling space, the outside air is passed between the outer layer body and the inner layer body through the through hole of the outer layer body from the outside air introduction hole of the spout by releasing the pressure to the outer layer body. Can be introduced. Thus, in the present invention, each time the outer layer body is pressed and released, the sliding cylinder portion slides in the flow space, so that the content liquid in the content liquid is interposed between the check valve and the inner plug. It is possible to prevent the particulate matter from being caught and stay and to ensure airtightness. In addition, when the double container is erected, the open / close wall portion of the check valve moves to the liquid flow path side, and the content liquid can be sucked back, so the occurrence of liquid dripping from the dispensing portion is also suppressed. be able to.

  Therefore, according to the present invention, it is possible to suppress the accumulation of particulate matter in the content liquid between the check valve and the inner plug, thereby suppressing the intrusion of outside air into the filling space, and the squeeze. The double container which can also suppress generation | occurrence | production of the liquid dripping from the extraction | pouring part at the time of cancellation | release can be provided.

It is a figure which shows the double container which concerns on 1st Embodiment of this invention, (a) is a longitudinal cross-sectional view, (b) is AA sectional drawing of (a). It is a longitudinal cross-sectional view which shows the state at the time of the squeeze of the double container of FIG. It is a longitudinal cross-sectional view of the double container which concerns on 2nd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the state at the time of the squeeze of the double container of FIG. It is a longitudinal cross-sectional view of the double container which concerns on 3rd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the state at the time of the squeeze of the double container of FIG. It is a figure which shows the double container which concerns on 4th Embodiment of this invention, (a) is a longitudinal cross-sectional view, (b) is BB sectional drawing of (a). It is a longitudinal cross-sectional view which shows the state at the time of the squeeze of the double container of FIG.

Hereinafter, with reference to FIGS. 1-2, the double container which concerns on 1st Embodiment of this invention is illustrated and demonstrated in detail.
As shown in FIG. 1, the double container 10 according to this embodiment includes an outer layer body 20 that forms an outer shell of the container, and an inner layer body 30 that is housed inside the outer layer body 20, and On the mouth portion of the container 10, an inner stopper 40, a content liquid check valve 50, an air check valve 60, a discharge stopper 70, and a lid body 80 are provided.

  Further, the double container 10 according to the present embodiment is obtained by laminating an outer layer body 20 made of a synthetic resin and an inner layer body 30 formed of a synthetic resin having low compatibility with the outer layer body 20. The parison formed by laminating these synthetic resin materials is obtained by blow molding. Although not shown, one or a plurality of adhesive bands that extend in the longitudinal direction and partially join the outer layer body 20 and the inner layer body 30 between the outer layer body 20 and the inner layer body 30. May be provided.

  The outer layer body 20 is formed by connecting a cylindrical portion having a reversible flexibility to a cylindrical mouth peripheral wall 21 and connecting a bottom portion (not shown) to the barrel portion. A male screw portion 22 is provided on the outer peripheral surface of the mouth peripheral wall 21. Further, a through hole 23 is provided in the mouth peripheral wall 21, and a groove portion 24 in which the male screw portion 22 is cut out in the vertical direction is provided on the outer peripheral surface provided with the through hole 23.

The inner layer body 30 has a filling space S that can be filled with the content liquid inside, and has an upper opening 31 that leads to the filling space S. The inner layer body 30 is reduced in volume by being peeled from the laminated outer layer body 20. Can be deformed.
The inner layer body 30 does not have to be bonded to the outer layer body 20, and therefore may be in any form as long as it undergoes volumetric deformation.

  The inner plug 40 has a top wall 41 that covers the upper opening 31 of the inner layer body 30. The top wall 41 is provided with a central step 42 that is convex upward. The central step portion 42 includes a disc-shaped central upper surface wall 42a centering on the axis O of the container 10 and a central peripheral wall 42b depending from the outer peripheral edge of the central upper surface wall 42a. The central peripheral wall 42b has a tapered shape with a slightly reduced diameter upward. The central upper surface wall 42a is provided with a liquid channel 43 penetrating the front and back. In this example, the liquid flow path 43 includes four circular holes arranged at equal intervals around the axis O.

  Further, the top wall 41 of the inner plug 40 is provided with an annular wall 44 on the radially outer side of the central peripheral wall 42 b, and the reverse for the liquid content is provided between the radial outer side of the central peripheral wall 42 b and the radial inner side of the annular wall 44. The sliding cylinder part 51 of the stop valve 50 is accommodated so as to be movable. Furthermore, an annular outer step 45 that fits into the upper opening 31 of the inner layer body 30 is provided on the radially outer side of the annular wall 44. A cylindrical inner peripheral wall 46 is provided on the outer peripheral edge of the outer step 45. The inner peripheral wall 46 is provided with an air hole 47 penetrating inside and outside.

  The content liquid check valve 50 is made of an elastic material such as rubber (elastomer), for example. Further, the content liquid check valve 50 includes a cylindrical sliding tube portion 51 provided around the axis O. On the outer peripheral surface of the sliding cylinder part 51, a step part 51a having a diameter decreasing upward is formed. The upper end of the sliding cylinder part 51 is covered with a disk-shaped opening / closing wall part 52, and the opening / closing wall part 52 is formed with a cross-shaped slit 53 as a penetrating part in this example. The central portion of the cross-shaped slit 53 is located at the central portion of the central upper surface wall 42 a of the top wall 41. That is, when the opening / closing wall 52 comes into contact with the central upper surface wall 42a of the top wall 41, the slit 53 is prevented from being pushed downward (to the liquid flow path 43 side), and the sealing performance is effectively maintained. Thus, the central portion of the slit 53 is supported at a position avoiding the liquid flow path 43 on the central upper surface wall 42a. The slit 53 may have other shapes such as a single character.

  An annular air check valve 60 made of an elastic material such as rubber is disposed between the annular wall 44 and the inner peripheral wall 46 of the inner plug 40. Specifically, the annular wall 44 has a plurality of annular wall side vertical ribs 44a arranged at equal intervals around the axis O on its outer peripheral surface, and the inner peripheral wall 46 has a plurality of inner peripheral walls on its inner peripheral surface. The side vertical ribs 46a are arranged at equal intervals around the axis O, and the lower surface of the air check valve 60 is supported by the upper end of the annular wall side vertical rib 44a and the step portion of the inner peripheral wall side vertical rib 46a. doing. On the upper surface of the air check valve 60, annular seal protrusions 61 are provided around the inner diameter side and the outer diameter side, respectively. In addition, a recess 62 having a circular arc cross section is formed between the seal protrusions 61 on the upper surface of the air check valve 60. A slit 63 penetrating the front and back of the air check valve 60 is formed at the bottom of the recess 62. As a result, the slit 63 is easily pushed open downward, but difficult to push upward.

The spout 70 connects an outer peripheral wall 71 that surrounds the mouth peripheral wall 21, and a female screw portion 72 corresponding to the male screw portion 22 of the mouth peripheral wall 21 is provided on the inner peripheral surface of the outer peripheral wall 71. In addition, a top wall 73 that covers the inner plug 40, the content liquid check valve 50, and the air check valve 60 is provided on the upper portion of the outer peripheral wall 71. The top wall 73 is provided with a pouring part 74 for pouring the content liquid in the filling space S under the opening of the liquid flow path 43 by the content liquid check valve 50. On the lower surface of the top wall 73, an upper fitting wall 75 that is fitted to the upper inner peripheral surface of the annular wall 44 is formed. As a result, the content liquid circulation space N ₁ is defined between the liquid flow path 43 and the extraction portion 74. The upper fitting wall 75 contacts the step 51a of the sliding cylinder portion 51 of the content liquid check valve 50 when the open / close wall portion 52 of the content liquid check valve 50 moves to the dispensing portion 74 side. In contact, it is designed to prevent further movement.

Further, an annular protrusion 76 that contacts the seal protrusion 61 on the inner peripheral side of the air check valve 60 is provided on the radially outer side of the upper fitting wall 75. Furthermore, an outside air introduction hole 77 that penetrates the top wall 73 is provided on the radially outer side of the annular protrusion 76. Thus, an annular ventilation space N ₂ is defined around the circulation space N ₁ to allow the outside air introduction hole 77 to communicate with the through hole 23 via the air check valve 60, the air hole 47 and the groove portion 24. The

  The lid 80 is connected to the outer peripheral wall 71 of the spout 70 via a hinge 81, and can be covered with the spout 74 and the outside air introduction hole 77 by being bent by the hinge 81. More specifically, the lid 80 includes a flat plate-like upper wall 82 and a lid peripheral wall 83 that is connected to the edge of the upper wall 82 and is continuous with the outer peripheral wall 71. Is provided with a rod 84 that enters the inside of the pouring part 74 and seals the pouring part 74 when the lid 80 is closed. Note that the lid 80 may be separated from the pouring stopper 70 without providing the hinge 81, and may be configured to be attached to the pouring stopper 70 with a screw or undercut.

In discharging the content liquid from the double container 10 configured as described above, when the lid 80 is opened as shown in FIG. 2 and the position of the double container 10 is changed from the upright position to the inverted position, the content liquid The non-return valve 50 is moved toward the dispensing part 74 due to its own weight. At that time, when the sliding cylinder 51 is guided and slid between the central peripheral wall 42 b and the annular wall 44, the step 51 a of the sliding cylinder 51 comes into contact with the tip of the upper fitting wall 75. The liquid check valve 50 stops moving. When the body portion of the outer layer body 20 is pressed, the inner layer body 30 is pressed by the air between the outer layer body 20 and the inner layer body 30, and the filling space S is pressurized. As a result, the pressurized content liquid pushes the opening / closing wall 52 of the content liquid check valve 50 toward the dispensing portion 74, and the slit 53 formed in the opening / closing wall 52 pushes and opens toward the dispensing portion 74. It is. As a result, the content liquid flows out from the liquid flow path 43 and is poured out from the pouring part 74 to the outside. Here, between the through-hole 23 and the outside air introduction hole 77, groove 24, but is connected at the air hole 47 and the vent space N _2, the ventilation space N _2, air is passed through from the outside air introduction hole 77 On the other hand, since the air check valve 60 for preventing the passage of air to the outside air introduction hole 77 is arranged, even if the outer layer body 20 is pressed, the air between the outer layer body 20 and the inner layer body 30 leaks. It is not dispensed and the content liquid dispensing function is maintained.

After the required amount of content liquid has been poured out, when the double container 10 is erected, the open / close wall portion 52 of the content liquid check valve 50 moves to the liquid flow path 43 side and the central upper surface of the top wall 41 Since it abuts against the wall 42a and the outside air from the extraction part 74 is prevented from passing through the slit 53, the entry of the outside air into the filling space S is effectively prevented. In addition, when the outer layer body 20 is released from being pressed, the outer layer body 20 tries to return to its original shape by its own restoring force, and therefore, the outer layer body 20 and the inner layer body 30 are in a negative pressure state. Thus, air is introduced from the outside air introduction hole 77 through the air check valve 60 and through the through hole 23, and the outer layer body 20 is restored while the volume of the inner layer body 30 is reduced. Thus, in the present embodiment, each time to release pressing and pressing the body portion of the outer layer member 20, the sliding tube portion 51 so as to slide within the circulation space N _1, the check valve for the liquid content It is possible to prevent the particulate matter such as soot in the content liquid from being caught between 50 and the inner plug 40 and staying there. Further, when the double container 10 is erected, the open / close wall portion 52 of the content liquid check valve 50 moves to the liquid flow path 43 side, and the content liquid can be sucked back. Occurrence of dripping from the liquid can also be suppressed.

Next, with reference to FIGS. 3-4, the double container which concerns on 2nd Embodiment of this invention is illustrated and demonstrated in detail.
As shown in FIG. 3, the double container 11 according to this embodiment is different from the double container 10 described with reference to FIGS. 1 and 2 except that the air check valve 60 is not used. Have the same configuration.

That is, the double container 11 has a configuration in which a throttle portion T that restricts the flow of air is provided between the ventilation space N ₂ and the through hole 23 instead of providing the air check valve 60. Specifically, the air hole 47 of FIG. 1 is not provided in the inner peripheral wall 46 of the inner plug 40, and the outer periphery of the inner peripheral wall 46 is between the upper end of the inner peripheral wall 46 and the lower surface of the top wall 73. Between the surface and the inner peripheral surface of the outer peripheral wall 71, a narrow groove-shaped throttle portion T is provided.

  Therefore, in discharging the content liquid from the double container 11 configured as described above, the content liquid can be poured out as shown in FIG. 4 as in the case of the first embodiment. Further, at this time, although the through hole 23 is connected to the outside air introduction hole 77, since the throttle portion T is provided between them, the outer layer body 20 and the inner layer body 30 even if the outer layer body 20 is pressed. The air between them does not leak so much, and the content liquid pouring function is maintained at the same level as before.

  Moreover, at the time of releasing the pressing of the outer layer body 20, as in the case of the first embodiment, it is possible to obtain the effect of suppressing the retention of particulate matter and the effect of suppressing the occurrence of dripping. In the present embodiment, when the outer layer body 20 is released from the pressure, air is hardly flown by the throttle portion T, but the restoring force can be adjusted by the material, thickness, shape, etc. of the outer layer body 20, and the passage of the throttle portion T can be cut off. By appropriately adjusting the area (groove width and groove depth) while maintaining the function of the throttle, the outer layer body 20 can be restored in a time equivalent to the case of using the check valve for air. In other words, according to the present invention, the desired performance is exhibited by changing the width and depth of the narrow groove, so that adjustment is easier than when using a check valve for air having a more complicated structure. In addition, a check valve for air is not required, and the cost can be reduced.

Next, with reference to FIGS. 5-6, the double container which concerns on 3rd Embodiment of this invention is illustrated and demonstrated in detail.
As shown in FIG. 5, the double container 12 according to the present embodiment is different from the double container 10 described with reference to FIGS. 1 to 2 in the shapes of the inner stopper 400 and the content liquid check valve 500. Others have the same configuration.

  The inner plug 400 of the present embodiment is an annular fitting cylinder 480 that hangs down from the top wall 41 and fits to the inner peripheral surface of the upper opening 31 of the inner layer body 30 instead of providing the outer stepped portion 45 of FIG. Is provided. Further, the inner plug 400 is provided with an intermediate step portion 490 that is convex upward on the top wall 41 at the base end portion of the annular wall 44, and the vertical width of the central peripheral wall 42 b by the amount provided with the intermediate step portion 490. Is reduced.

  Further, the content liquid check valve 500 of the present embodiment is configured such that the sliding cylinder portion 54 slides along the inner peripheral surface of the upper fitting wall 75 of the spout 70. Further, when the opening / closing wall 52 moves to the dispensing portion 74 side, the upper end of the sliding cylinder portion 54 comes into contact with the lower surface of the top wall 73, so that the movement of the opening / closing wall 52 stops. ing. Other configurations are the same as those in the case of the check valve 50 for content liquid shown in FIG.

  Therefore, in discharging the content liquid from the double container 12 configured as described above, the content liquid can be poured out as shown in FIG. 6 as in the case of the first embodiment. Moreover, at the time of releasing the pressing of the outer layer body 20, as in the case of the first embodiment, it is possible to obtain the effect of suppressing the retention of particulate matter and the effect of suppressing the occurrence of dripping.

Next, with reference to FIGS. 7-8, the double container which concerns on 4th Embodiment of this invention is illustrated and demonstrated in detail.
As shown in FIG. 7, the double container 13 according to this embodiment is different from the double container 10 described with reference to FIGS. The configuration is the same except that the shape is different.

The content liquid check valve 90 of the present embodiment is formed as a rigid body made of, for example, a resin material. The non-return valve 90 for the liquid is connected to the opening / closing wall portion 92 having a disc shape and having a through passage 91 passing through the front and back as a through portion at the center, and the outer peripheral edge of the opening / closing wall portion 92, and a sliding tube portion 93 guided in the space N ₁ slidably. When the opening / closing wall portion 92 moves to the extraction portion 74 side, the sliding cylinder portion 93 moves so that the upper end of the sliding cylinder portion 93 contacts the lower surface of the top wall 73. Has come to stop.

  In the middle plug 401 of the present embodiment, the outer peripheral edge of a disc-shaped central upper surface wall 42 a centering on the axis O is connected to the middle portion in the vertical direction of the annular wall 44. As in the case of the first embodiment, the central upper surface wall 42a is provided with the liquid flow paths 43 penetrating the front and back surfaces. In this example, the liquid flow paths 43 are arranged at equal intervals around the axis O. It consists of 12 circular holes. Other configurations are the same as those of the inner plug 40 of FIG.

In discharging the content liquid from the double container 13 configured as described above, when the lid 80 is opened as shown in FIG. 8 and the posture of the double container 13 is changed from the upright position to the inverted position, the content liquid The check valve 90 moves toward the dispensing part 74 due to its own weight. At that time, the sliding cylinder portion 93 is guided and slid by the inner peripheral surface of the upper fitting wall 75. When the body portion of the outer layer body 20 is pressed, the inner layer body 30 is pressed by the air between the outer layer body 20 and the inner layer body 30, and the filling space S is pressurized. Thereby, the content liquid from the liquid flow path 43 passes through the through-passage 91 and is poured out from the pouring part 74 to the outside. Here, between the through-hole 23 and the outside air introduction hole 77, groove 24, but is connected at the air hole 47 and the vent space N _2, the ventilation space N _2, air is passed through from the outside air introduction hole 77 On the other hand, since the air check valve 60 for preventing the passage of air to the outside air introduction hole 77 is arranged, even if the outer layer body 20 is pressed, the air between the outer layer body 20 and the inner layer body 30 leaks. It is not dispensed and the content liquid dispensing function is maintained.

After the required amount of content liquid has been poured out, when the double container 13 is erected, the open / close wall portion 92 of the content liquid check valve 90 moves to the liquid flow path 43 side and the central upper surface of the top wall 41 Since it abuts against the wall 42a and the outside air from the extraction portion 74 is prevented from passing through the through passage 91, the entry of the outside air into the filling space S is effectively prevented. In addition, when the outer layer body 20 is released from being pressed, the outer layer body 20 tries to return to its original shape by its own restoring force, and therefore, the outer layer body 20 and the inner layer body 30 are in a negative pressure state. Thus, air is introduced from the outside air introduction hole 77 through the air check valve 60 and through the through hole 23, and the outer layer body 20 is restored while the volume of the inner layer body 30 is reduced. Thus, in the present embodiment, each time to release pressing and pressing the body portion of the outer layer member 20, the sliding tube portion 93 so as to slide within the circulation space N _1, the check valve for the liquid content It is possible to prevent the particulate matter such as soot in the contents liquid from being caught between 90 and the inner plug 401 and staying there. Further, when the double container 13 is erected, the opening / closing wall portion 92 of the content liquid check valve 90 moves to the liquid flow path 43 side so that the content liquid can be sucked back. Occurrence of dripping from the liquid can also be suppressed.

  The above description shows only one embodiment of the present invention, and various modifications can be made within the scope of the claims. For example, the outer layer body and the inner layer body are not limited to those formed by blow molding a parison having a laminated structure, and the outer layer body and the inner layer body are individually formed, and then the inner layer body is mounted in the outer layer body. You may have done.

DESCRIPTION OF SYMBOLS 10, 11, 12, 13 Double container 20 Outer layer body 21 Portion peripheral wall 22 Male thread part 23 Through-hole 24 Groove part 30 Inner layer body 31 Upper opening 40 Inner plug 41 Top wall 42 Central step part 42a Central upper surface wall 42b Central peripheral wall 43 Liquid Flow path 44 Annular wall 44a Annular wall side vertical rib 45 Outer step 46 Inner peripheral wall 46a Inner peripheral wall side vertical rib 47 Air hole 50 Contents liquid check valve 51 Sliding cylinder part 51a Stepped part 52 Opening / closing wall part 53 Slit (through) Part)
60 Air Check Valve 61 Seal Protrusion 62 Recess 63 Air Check Valve Slit 70 Outlet 71 71 Outer Wall 72 Female Threaded Part 73 Top Wall 74 Outlet 75 Upper Fitting Wall 76 Annular Projection 77 Outside Air Introducing Hole 80 Lid Body 81 Hinge 82 Upper wall 83 Lid peripheral wall 84 Rod 90 Content liquid check valve 91 Through passage (penetrating portion)
92 Opening / closing wall part 93 Sliding cylinder part 400, 401 Inner plug 480 Fitting cylinder 490 Intermediate stage part 500 Non-return valve for liquid S S Filling space O Axis N ₁ distribution space N ₂ Ventilation space T Throttle part

Claims (4)

An outer layer body having a through hole in the peripheral wall of the mouth and forming an outer shell of the container;
An inner layer body that has an upper opening that leads to a filling space of the content liquid and that is housed inside the outer layer body and is volume-reduced and deformed by air introduced between the through hole and the outer layer body;
It has an outer peripheral wall mounted on the peripheral wall of the mouth, a top wall connected to the outer peripheral wall has a pouring part for pouring the liquid content from the filling space, and an outside air introduction hole leading to the through hole In a double container with a spout,
The top wall covering the upper opening has a liquid flow path connected to the filling space, and cooperates with the discharge plug to partition a flow space for the content liquid between the liquid flow path and the extraction portion. A plug,
A content valve check valve disposed in the circulation space,
The content liquid check valve moves to the extraction portion side by inverting the double container, and from the liquid flow path by pressurization to the filling space accompanying the pressing to the outer layer body While passing the content liquid, the penetrating portion is formed so as to move to the liquid flow path side and come into contact with the top wall, thereby forming a through portion that prevents passage of outside air from the extraction portion. A double container comprising: an openable / closable wall portion; and a sliding cylinder portion that is connected to the open / close wall portion and is slidably guided in the circulation space.   The double container according to claim 1, wherein the penetrating portion of the content liquid check valve is a slit. The inner plug cooperates with the pouring plug to define an annular ventilation space that allows the outside air introduction hole to communicate with the through hole around the circulation space.
3. The double according to claim 1, wherein an air check valve is provided in the ventilation space to allow air from the outside air introduction hole to pass therethrough while preventing air from passing through the outside air introduction hole. container. The inner plug cooperates with the pouring plug to define an annular ventilation space that allows the outside air introduction hole to communicate with the through hole around the circulation space.
The double container according to claim 1 or 2, wherein a throttle part for restricting an air flow is provided between the ventilation space and the through hole.

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