JP2019119450A - Double container - Google Patents

Abstract

To propose a double container which can be suitably used even when containing a relatively high viscosity content.SOLUTION: A double container of the present invention comprises an inner layer body 1, an outer layer body 2 and a pouring cap 3. The pouring cap 3 includes: a pouring cap body 6 having a top wall 6a with a pouring spout 6d; an inner plug 4 including a ceiling wall 4a provided on the inside of the pouring cap body 6 and located above the mouth 2a and a cylindrical wall 4b having a lower opening 4d that protrudes from the ceiling wall 4a toward the back surface of the top wall 6a and a lower opening 4d that opens to the filling space S and an upper opening 4c that communicates with the spout 6d; and a moving valve 7 which is disposed movably inside the cylindrical wall 4b and closes the lower opening 4d when moving toward the lower opening 4d, and also opens the lower opening 4d when moving toward the upper opening 4c and pours out the content of the filling space S from the outlet 6d through the cylindrical wall 4b.SELECTED DRAWING: Figure 1

Description

  The present invention has an inner layer body having a filling space for containing contents, an outer layer body having flexibility and containing the inner layer body inside, a spout communicating with the filling space, and at the mouth of the outer layer body. The present invention relates to a dual container provided with a pouring cap to be mounted, and more particularly to a dual container suitable for containing relatively viscous contents.

  In recent years, in a container in which a pouring cap is attached to a container main body for containing contents, a double container (delaminated container) comprising a container main body comprising an inner layer body and an outer layer body as shown in Patent Document 1, for example , Also known as laminated peeling containers). A flexible outer layer body is used for this type of container, and the outer layer body is provided with a vent for taking in air into an internal space located between the outer layer body and the inner layer body. In addition, inside the pouring cap, a check valve such as a three-point valve that closes the opening leading to the inner layer, and after pouring, pull back the contents accumulated around the pouring outlet by moving toward the inner layer side. A spherical valve is provided.

  According to the double container of such a configuration, the internal space is pressurized by pressing the outer layer body, whereby the pressure in the filling space can be increased and the contents can be poured out. When the pressure on the outer layer is released, the pressure in the inner space is reduced as the outer layer is restored, whereby air can be introduced from the vent into the inner space, and only the inner layer can be reduced in volume. That is, there is an advantage that the self-sustaining ability of the container is maintained even if the content is reduced. Further, the contents can be poured out without being replaced with the outside air, and the check valve such as a three-point valve can prevent the contents from being exposed to the outside air, so There is also an advantage that it is difficult to cause quality deterioration. For this reason, containers of this type are being widely used as containers suitable for containing, for example, seasonings such as soy sauce and cosmetics such as lotions.

JP, 2013-151316, A

  By the way, when a relatively high viscosity material such as a medium density source or a conditioner is adopted as the content to be contained in such a double container, a three-point valve separated from the valve seat at the time of pouring is originally used. The contents could be exposed to the atmosphere without returning. In addition, when the contents were poured out, the outer layer had to be pressed relatively strongly. Furthermore, while the spherical valve moves outward when pouring out the contents, while it pulls back the contents by moving toward the inside of the inner layer after pouring out, the highly viscous contents In some cases, the contents stored around the pouring outlet could drip without being pulled back.

  An object of the present invention is to solve such a problem, and an object of the present invention is to provide a double container which can be suitably used even when containing a relatively high viscosity content. I assume.

According to the present invention, an inner layer body having a filling space capable of reducing the volume and having contents and having flexibility, containing the inner layer body inside and an inner space between the inner layer body and the inner layer body A double container comprising: an outer layer body having a vent opening communicating with the inner space; and a pouring cap having an outlet communicating with the filling space and attached to a mouth of the outer layer body,
The pouring cap is
A pouring cap body having a top wall comprising the pouring outlet;
A ceiling wall provided on the inside of the pouring cap main body, located above the mouth, and a lower opening projecting from the ceiling wall toward the back of the top wall and opening toward the filling space; An internal plug comprising a tubular wall having an upper opening leading to the spout;
It is disposed movably inside the cylindrical wall and closes the lower opening when moving toward the lower opening, and opens the lower opening when moving toward the upper opening, the cylinder A transfer valve for discharging the contents of the filling space from the spout through the annular wall.

  It is preferable that the cylindrical wall has a lower inner circumferential surface which is reduced in diameter toward the lower opening.

  The tubular wall preferably has an upper inner circumferential surface whose inner diameter is larger than the maximum diameter of the lower inner circumferential surface.

  Preferably, the movable valve has a lower outer peripheral surface parallel to the lower inner peripheral surface.

  The movable valve preferably includes a main body having the lower outer peripheral surface, and a plurality of ribs extending upward from the main body and provided at intervals in the circumferential direction.

  The movable valve includes a main body having the lower outer peripheral surface, an annular portion located above the main body, and a plurality of connecting portions for connecting the main body and the annular portion at intervals in the circumferential direction. It is preferable to have

The outer layer body has the vent at the mouth,
The pouring cap main body is connected to the top wall and surrounds the mouth and has an outer peripheral wall having a passage communicating with the vent between the mouth and an outside air passing through the top wall and leading to the passage With an introduction hole,
The pouring cap is seated on the back surface of the ceiling wall and closes the outside air introducing hole at least when the internal space is pressurized with the pressing on the outer layer body, while the inner portion is associated with the restoration of the outer layer body At the time of pressure reduction of the space, it is preferable to have an air valve that opens the outside air introduction hole after the closing of the lower opening by the moving valve.

  In the double container of the present invention, the three-point valve which conventionally used the top wall of the inside plug as a valve seat is eliminated, while the top wall projects toward the back of the top wall of the pouring cap main body and filling space A cylindrical wall having a lower opening that opens toward the lower opening and an upper opening leading to the pouring outlet, and inside the cylindrical wall, the lower opening is closed when moving toward the lower opening, while the upper opening is closed The lower opening is opened at the time of movement to the direction, and a moving valve is provided to cause the contents of the filling space to be poured out from the pouring port through the cylindrical wall. That is, since the three-point valve is supported by the narrow connecting piece, such a moving valve may cause the connecting piece to be deformed and not return when the contents with relatively high viscosity are poured out. Since there is no possibility of deformation, even the contents with high viscosity can be prevented from being exposed to the outside air. In addition, the moving valve moves toward the upper opening at the time of pouring, and moves toward the lower opening after pouring, so that the contents stored around the pouring outlet are pulled back to prevent dripping of the contents Can.

  The inner diameter of the lower inner circumferential surface of the cylindrical wall may be constant, but if the diameter is reduced toward the lower opening, the lower inner circumferential surface moves as the moving valve moves toward the upper opening. The gap between the surface and the moving valve becomes large. Thereby, even if the content is relatively high in viscosity, it is possible to suppress the pressing force applied to the outer layer body.

  Further, in the case where the diameter of the lower inner peripheral surface of the cylindrical wall is reduced toward the lower opening as described above, the lower outer peripheral surface of the movable valve is configured to be parallel to this as well. Since the contact area between the moved moving valve and the cylindrical wall is increased, it is possible to more reliably prevent the problem of the contents being exposed to the outside air.

  The upper inner peripheral surface of the cylindrical wall may have an inner diameter equal to the maximum diameter of the lower inner peripheral surface, but if the upper inner peripheral surface is larger than the maximum diameter of the lower inner peripheral surface, Since the gap between the peripheral surface and the moving valve is larger, it is easy to pass even the contents with relatively high viscosity, and the pressing force applied to the outer layer can be further suppressed.

  And while pressing the inner space at least with pressure to the outer layer body, the outer surface of the outer wall is closed by sitting on the back surface of the top wall of the outlet cap, and the inside of the outer layer is restored. When reducing the space and providing an air valve that opens the outside air introduction hole behind the closing of the lower opening by the moving valve, when the outer layer restores, first the contents stored in the pouring outlet are pulled back Because it is used, it is possible to prevent the dripping of the contents more reliably.

FIG. 7 is a side cross-sectional view showing the periphery of the dispensing cap for one embodiment of the dual container according to the present invention. (A) is a plan view of the movable valve shown in FIG. 1, (b) is a cross-sectional view taken along the line A-A of (a), (c) shows a modified example of the movable valve It is a top view, (d) is a sectional view which meets a B-B line of (c). It is a figure which shows the state which opened the lid and displaced the double container to the inclination attitude | position. It is a figure which shows the state which presses an outer-layer body after the state shown in FIG. 3, and the contents are poured out. It is a figure which shows the state which the outer-layer body began to decompress | restore after the state shown in FIG. It is a figure which shows the state in which air is taken in from an external air introduction port after the state shown in FIG.

  Hereinafter, with reference to FIG. 1, one embodiment of a double container according to the present invention will be described. In the present specification and the like, the “upper” direction and the “lower” direction are states in which the outer layer (symbol 2) is positioned below and the lid (symbol 8) is positioned above as shown in FIG. Say the direction in

  The double container of the present embodiment includes an inner layer 1, an outer layer 2, a pouring cap 3 (including an inner plug 4, an air valve 5, a pouring cap main body 6, and a moving valve 7), and a lid 8. Have.

  The inner layer body 1 is provided with a filling space S capable of containing the contents inside thereof. The inner layer body 1 of the present embodiment is made of a thin synthetic resin and is provided so as to be capable of volume reduction and deformation.

  The outer layer body 2 includes a cylindrical opening 2 a extending along the central axis O. The lower portion 2c of the mouth portion 2a of the present embodiment is formed to have a large diameter with respect to the upper portion 2b where the upper end is open. Further, a male screw portion 2d is provided on the outer peripheral surface of the upper portion 2b. Further, the upper portion 2b is provided with a vent 2e penetrating the upper portion 2b in the radial direction, and on the outer peripheral surface where the vent 2e opens, a notch extending in the vertical direction to divide the male screw portion 2d 2f is provided. Although not shown, a cylindrical body and a bottom for closing the lower end of the body are provided below the mouth 2a. Further, the outer layer body 2 of the present embodiment is made of synthetic resin, and the body portion has flexibility.

  Further, between the inner layer body 1 and the outer layer body 2, an internal space N communicating with the vent 2e is formed.

  The inner layer body 1 and the outer layer body 2 in the present embodiment are those in which synthetic resins having low mutual compatibility are laminated in a peelable manner. As a synthetic resin constituting the inner layer body 1, nylon resin (PA), ethylene vinyl alcohol copolymer resin (EVOH), modified polyolefin resin (for example, "Admar" (registered trademark) manufactured by Mitsui Chemicals, Inc.) should be adopted. Can. Moreover, as a synthetic resin which comprises the outer-layer body 2, polyethylene resin (PE) including the low density polyethylene (LDPE) and high density polyethylene resin (HDPE) is employable, for example. Such inner layer body 1 and outer layer body 2 can be obtained by blow molding a parison in which the synthetic resin material forming the inner layer body 1 and the synthetic resin material forming the outer layer body 2 are laminated, In addition, preparing a test tubular preform in which the synthetic resin material of the inner layer body 1 and the synthetic resin material of the outer layer body 2 are laminated, forming the preform by biaxial stretch blow molding, or the inner layer It is also possible to use one in which the body and the outer layer are separately formed, and then the inner layer is disposed on the inner side of the outer layer. Also, although not shown, one or more adhesive bands extending in the longitudinal direction between the inner layer body 1 and the outer layer body 2 to partially bond the inner layer body 1 and the outer layer body 2 May be provided.

  The inside plug 4 is provided with a top wall 4a located above the mouth 2a. At the central portion of the ceiling wall 4a, there is provided a cylindrical wall 4b projecting upward from the ceiling wall 4a and projecting downward as well. Here, the cylindrical wall 4b is provided such that the upper end thereof is located near the back surface of the top wall of the pouring cap main body 6 described later. Further, the upper end of the cylindrical wall 4b is open (referred to as the upper opening 4c) and communicates with the outlet of the outlet cap main body 6 described later. The lower end of the cylindrical wall 4b is open (referred to as the lower opening 4d) and communicates with the filling space S. The lower inner circumferential surface 4e of the cylindrical wall 4b is formed in a conical surface shape by reducing its diameter toward the lower opening 4d. The upper inner peripheral surface 4f of the cylindrical wall 4b is connected to the step 4g which extends radially outward from the upper end of the lower inner peripheral surface 4e, and the inner diameter thereof is the maximum diameter of the lower inner peripheral surface 4e It is larger than the inner diameter of the upper end of the circumferential surface 4e.

  And, on the upper surface of the ceiling wall 4a, an inner plug annular wall 4h provided at a distance from the cylindrical wall 4b and an outer edge wall 4j provided at the outer edge of the ceiling wall 4a are provided. Further, the outer edge portion of the ceiling wall 4a and the outer edge wall 4j are provided with a notch 4k which is formed by cutting these and penetrating the inside and outside in the radial direction. And, on the lower surface of the top wall 4a, an annular seal wall 4m which is in fluid-tight contact with the inner layer 1 is provided. The inside plug 4 of the present embodiment is formed of, for example, a synthetic resin such as polypropylene (PP).

  The air valve 5 has a tubular shape centered on the central axis O, and includes a base 5a whose lower end is supported by the tubular wall 4b and the inner plug annular wall 4h. On the radially outer side of the base 5a, a thin-walled portion 5b which is substantially doughnut-shaped and elastically deformable is provided. Here, the thin-walled portion 5b of the present embodiment will be described in more detail. The inner edge portion is integrally connected to the base portion 5a, the middle portion is curved downward to be convex, and the outer edge portion is bent downward. I am bent. Further, the air valve 5 of the present embodiment is formed of a soft material such as rubber, elastomer, soft polyethylene (low density polyethylene) or the like.

  The pouring cap main body 6 is integrally connected to the top wall 6a located above the air valve 5 and the outer edge of the top wall 6a, and surrounds the mouth 2a, and the outer peripheral wall whose lower end airtightly abuts on the lower portion 2c And 6b. Further, on the inner peripheral surface of the outer peripheral wall 6b, a female screw portion 6c that fits the male screw portion 2d is provided. The pouring cap main body 6 of the present embodiment is made of synthetic resin.

  At the central portion of the top wall 6a, a pouring outlet 6d is provided through the top wall 6a. Further, on the upper surface of the top wall 6a, there is provided a pouring cylinder 6e which surrounds the pouring outlet 6d and is curved at the upper end radially outward to form a lip. The lower surface of the top wall 6a is provided with an inner annular wall 6f located radially inward of the base 5a and an outer annular wall 6g located radially outward of the base 5a. Support the department. Further, a valve seat portion 6h which protrudes downward and abuts against the thin wall portion 5b of the air valve 5 is provided on the radially outer side of the outer annular wall 6g.

  Further, the top wall 6a is provided with an outside air introduction port 6j penetrating through the front and back. Here, between the outside air inlet 6j and the vent 2e, the space formed between the top wall 4a and the top wall 6a passes through the notch 4k, and between the mouth 2a and the outer peripheral wall 6b. A passage T is provided through the notch 2f or a spiral gap formed between the male screw 2d and the female screw 6c. The passage T allows the air taken in from the outside air inlet 6j to pass, and providing the notch 2f facilitates the flow of the air passing through the passage T, but this may be omitted. Moreover, the convex part 6k which protrudes toward radial direction outer side is provided in the outer edge part of the top wall 6a.

  The moving valve 7 is disposed movably between the upper opening 4c and the lower opening 4d inside the cylindrical wall 4b. The movable valve 7 of the present embodiment includes a main body 7 a that forms a base of the movable valve 7. The main body portion 7a has a shape that reduces in diameter upward and also decreases in diameter downward. The outer surface reduced in diameter downward is referred to as a lower outer peripheral surface 7 b. Here, the lower outer peripheral surface 7 b is formed in a conical surface shape which is parallel to the lower inner peripheral surface 4 e. Further, the main body portion 7a is provided with a plurality of ribs 7c which extend upward and are provided at intervals in the circumferential direction. As shown in FIGS. 2A and 2B, a total of six ribs 7c according to this embodiment are provided at equal intervals. In the outer peripheral surface of the rib 7c, as shown in FIG. 1, the portion with the largest outer diameter is slightly smaller than the inner diameter of the upper inner peripheral surface 4f, and the largest diameter of the lower inner peripheral surface 4e (the lower inner peripheral surface 4e The outer diameter is larger than the inner diameter of the upper end).

  The lid 8 includes an upper wall 8a located above the top wall 6a and an outer lid peripheral wall 8b integrally coupled to the upper wall 8a.

  On the lower surface of the upper wall 8a, there is provided a seal cylinder 8c which is inserted into the inside of the pouring cylinder 6e and which airtightly abuts on the pouring outlet 6d.

  On the inner circumferential surface of the lid outer peripheral wall 8b, an engagement recess 8d is provided which engages with the convex portion 6k to maintain the lid 8 in a closed state. Further, on the outer peripheral surface of the lid outer peripheral wall 8b, a hinge portion 8e integrally connected to the outer peripheral wall 6b of the pouring cap main body 6 is provided. In addition, although the lid 8 of this embodiment is integrally connected with the pouring cap main body 6, it is provided separately from the pouring cap main body 6, and can be detachably attached to the pouring cap main body 6 by a screw or an undercut. It may be attached to

  Such a double container is particularly suitable for containing relatively viscous contents (e.g., a viscosity of 870 mPa · s or more) such as a thick source.

  Next, the situation where the contents are poured out from the above-described double container will be described.

  First, as shown in FIG. 3, with the lid 8 open, the outer layer 2 is displaced to a tilted posture, and the body of the outer layer 2 is further pressed. As a result, the internal space N is pressurized and the pressure in the filling space S is increased, so the moving valve 7 moves toward the upper opening 4c together with the contents as shown in FIG. The contents entering the inside of the cylindrical wall 4b from the lower opening 4d pass between the adjacent ribs 7c, pass through the upper opening 4c, and are poured out from the outlet of the pouring barrel 6e via the pouring outlet 6d. Be Here, the inner diameter of the lower inner circumferential surface 4e of the present embodiment increases toward the upper opening 4c, so the lower inner circumferential surface 4e and the moving valve 7 move as the moving valve 7 moves toward the upper opening 4c. The gap with is large. For this reason, even if the content is relatively high in viscosity, the flow resistance in the gap can be suppressed, so the content can be poured out without applying a large pressing force to the outer layer 2. In the state where the lower outer peripheral surface 7b approaches the upper inner peripheral surface 4f as shown in FIG. 4, the inner diameter of the upper inner peripheral surface 4f is larger than the maximum diameter of the lower outer peripheral surface 7b as shown in FIG. Thus, the flow resistance of the contents is reduced, and the force for pressing the outer layer 2 can be suppressed. In addition, since the inclination of the movable valve 7 in the cylindrical wall 4b is suppressed by the rib 7c, it is possible to prevent the problem that the movable valve 7 becomes stuck in the middle of the cylindrical wall 4b and can not move.

  Then, as shown in FIG. 5, when the pressure on the outer layer 2 is released, the flexible outer layer 2 starts to be restored, and the internal space N is decompressed accordingly, and the inner layer 1 also starts to be restored. As a result, the contents entering the inside of the cylindrical wall 4b are pulled back to the filling space S, so the contents stored inside the pouring cylinder 6e are also pulled back, and the moving valve 7 also moves to the lower opening 4d side. start.

  Then, as shown in FIG. 6, when the moving valve 7 abuts on the lower opening 4d and the withdrawal of the contents is stopped, the decompression of the internal space N proceeds by further restoration of the outer layer 2, and thereby the outside air inlet 6j The taken-in air elastically deforms the thin-walled portion 5 b to move away from the valve seat 6 h and is taken into the pouring cap main body 6. In order to cause the recovery of the inner layer body 1 to take priority over the elastic deformation of the thin portion 5b in the recovery of the outer layer body 2 in this way, for example, it is realized by adjusting the thickness, shape, etc. of the thin portion 5b. It is possible. Then, the taken-in air passes through the passage T to reach the vent 2e and is further introduced into the inner space N, so that the outer layer 2 can be restored while the inner layer 1 is reduced in volume.

  In the state of FIG. 6, the lower outer peripheral surface 7b of the movable valve 7 is in close contact with the lower inner peripheral surface 4e to prevent the outside air from entering the filling space S, and the contents remaining on the cylindrical wall 4b are also Since the outside air is prevented from entering the filling space S, the quality of the contents contained in the inner layer body 1 can be maintained at a high level. In addition, since the moving valve 7 closes the lower opening 4d after pulling back the contents accumulated inside the pouring cylinder 6e, it is possible to effectively prevent liquid dripping from the pouring cylinder 6e.

  By the way, the moving valve 7 described above may be as shown in FIGS. 2 (c) and 2 (d). The illustrated movable valve 9 is provided with a main body portion 9a which is shaped so as to decrease in diameter downward. Further, the lower outer peripheral surface 9b of the main body portion 9a is formed in a conical surface shape parallel to the lower inner peripheral surface 4e, similarly to the lower outer peripheral surface 7b described above. Further, an annular portion 9c is provided above the main body portion 9a, and a plurality of connecting portions 9d are provided between the main body portion 9a and the annular portion 9c to connect them at intervals in the circumferential direction. It is done. A total of four connecting portions 9 d of the present embodiment are provided at equal intervals.

  Although not shown, even in the case of a double container provided with the moving valve 9 instead of the moving valve 7, the lower outer peripheral surface 9b is in close contact with the lower inner peripheral surface 4e, and the contents are adjacent connecting parts 9d. Since it is possible to flow through the gap, and the annular portion 9c can prevent the problem that the movable valve 9 is inclined in the cylindrical wall 4b and hooked halfway, the same effect as the movable valve 7 described above can be obtained. It is.

  As mentioned above, although the present invention was explained showing a concrete embodiment, a double container according to the present invention is not restricted to the embodiment mentioned above, and what changed variously in the category according to a claim is also included. included. For example, the vent for introducing air into the inner space is not limited to the one provided at the mouth of the outer layer, but may be provided at the bottom of the outer layer or in the body. At that time, the position at which the air valve is provided may be changed as appropriate. Furthermore, it is also possible to realize the above-mentioned function without using an air valve, for example, by appropriately selecting a gap of a passage through which air reaches the vent.

1: inner layer 2: outer layer 2a: mouth 2b: upper part 2c: lower part 2d: male screw 2e: air vent 2f: notch 3: pouring cap 4: inner plug 4a: ceiling wall 4b: cylindrical wall 4c: upper opening 4d: lower opening 4e: lower inner circumferential surface 4f: upper inner circumferential surface 4g: step 4h: inside plug annular wall 4j: outer edge wall 4k: notch 4m: seal wall 5: air valve 5a: base 5b : Thin-walled part 6: Dispensing cap main body 6a: Top wall 6b: Outer peripheral wall 6c: Female screw part 6d: Pouring outlet 6e: Dispensing cylinder 6f: Inner annular wall 6g: Outer annular wall 6h: Valve seat 6j: Outside air inlet 6k: convex part 7: moving valve 7a: main body 7b: lower outer peripheral surface 7c: rib 8: lid 8a: upper wall 8b: lid outer peripheral wall 8c: seal cylinder 8d: engagement recess 8e: hinge part 9: moving valve 9a: main body 9b: lower outer peripheral surface 9c: annular portion 9d: connecting portion N: internal space S: filling space T: passage

Claims (7)

An inner layer body having a filling space which can be reduced and deformed, and has flexibility, and has an inner space between the inner layer body and the inner layer body, and the inner layer body What is claimed is: 1. A double container comprising: an outer layer body having a vent leading to a space; and a pouring cap having a pouring outlet leading to the filling space and attached to the mouth of the outer layer body,
The pouring cap is
A pouring cap body having a top wall comprising the pouring outlet;
A ceiling wall provided on the inside of the pouring cap main body, located above the mouth, and a lower opening projecting from the ceiling wall toward the back of the top wall and opening toward the filling space; An internal plug comprising a tubular wall having an upper opening leading to the spout;
It is disposed movably inside the cylindrical wall and closes the lower opening when moving toward the lower opening, and opens the lower opening when moving toward the upper opening, the cylinder A transfer valve for pouring out the contents of the filling space from the spout through the annular wall.   The double container according to claim 1, wherein the cylindrical wall has a lower inner circumferential surface which is reduced in diameter toward the lower opening.   The double container according to claim 2, wherein the cylindrical wall has an upper inner peripheral surface whose inner diameter is larger than the maximum diameter of the lower inner peripheral surface.   The double container according to claim 2 or 3, wherein the movable valve has a lower outer peripheral surface parallel to the lower inner peripheral surface.   The double container according to claim 4, wherein the movable valve has a main body having the lower outer peripheral surface, and a plurality of ribs extending upward from the main body and spaced apart in the circumferential direction. .   The movable valve includes a main body having the lower outer peripheral surface, an annular portion located above the main body, and a plurality of connecting portions for connecting the main body and the annular portion at intervals in the circumferential direction. The double container according to claim 4 having The outer layer body has the vent at the mouth,
The pouring cap main body is connected to the top wall and surrounds the mouth and has an outer peripheral wall having a passage communicating with the vent between the mouth and an outside air passing through the top wall and leading to the passage With an introduction hole,
The pouring cap is seated on the back surface of the ceiling wall and closes the outside air introducing hole at least when the internal space is pressurized with the pressing on the outer layer body, while the inner portion is associated with the restoration of the outer layer body The double container according to any one of claims 1 to 6, further comprising an air valve that opens the outside air introduction hole behind the closing of the lower opening by the moving valve when the space is depressurized.

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