JP6559089B2 - Double container cap - Google Patents

Description

  According to the present invention, for a double container comprising an inner layer body capable of volume reduction and deformation, and an outer layer body having the inner layer body disposed inside, the contents attached to the mouth of the outer layer body and accommodated in the inner layer body are poured out. The present invention relates to a cap for a double container.

  As a container for storing cosmetics such as skin lotion, shampoo, rinse, liquid soap, food seasoning, etc., an inner layer body that accommodates such contents and can be reduced in volume and deformed, and this inner layer body There is known a double container including an outer layer body that forms an outer shell of the container while housing the container inside. This double container includes a delamination container (lamination peeling container) formed by laminating an outer layer body and an inner layer body from the beginning, and a container of a type in which the outer layer body and the inner layer body are individually formed and assembled. The delamination container is composed of an EBM (Extrusion Blow Molding) in which a laminated parison heated and melted is sandwiched between molds and air is blown inside to form a laminated container, and an outer layer and an inner layer. There is one by biaxial stretch blow molding in which a laminated container is formed from a preform (container material) formed in a bottomed cylindrical shape. In such a double container, a cap for a double container provided with a check tube for preventing the entry of outside air into the inner layer body while being provided with a dispensing cylinder for pouring the contents at the mouth of the normal outer layer body. Is installed. Then, by pressing the outer layer body, the inner layer body is pressurized via the air between the outer layer body and the inner layer body, thereby opening the valve body of the check valve and pouring out the contents. In addition, the outer layer body is provided with a through hole that takes in outside air between the inner layer body, and when the outer layer body is restored to its original shape after pouring, the outside air is taken in from the through hole, and the inner layer body is Only the outer layer is restored while the volume is reduced.

  By the way, in the above-mentioned double container cap, when the outside air is introduced from the outside air introducing hole provided in the cap, the outside air introduction having a thin annular valve body as in Patent Document 1, for example, in the flow path. A valve is used. When the outer layer body is pressed to increase the pressure inside the inner layer body and the contents are discharged, the valve body of the outside air introduction valve abuts against the inner surface of the spout and is kept closed so that air passes through it. I can't. Further, when the outer layer body is restored to its original shape after the contents are poured out, the pressure in the space between the outer layer body and the inner layer body is reduced to a negative pressure, and the outside air introduction valve is opened. As a result, air is introduced into the space between the outer layer body and the inner layer body from the outer air introduction hole, and the outer layer body can be restored to the original shape while maintaining the volumetric deformation.

JP 2013-151316 A

  However, in the outside air introduction valve having the above structure, since the valve body is formed of a soft material, the valve body may be distorted when the contents are heat-filled. Further, since the rigidity of the valve body is low and the outer peripheral side is a free end, it is easy to vibrate, and vibration noise may be generated when outside air is introduced.

  An object of the present invention is to solve such problems, and an object of the present invention is to propose a cap for a double container in which a stable operation of an outside air introduction valve is possible.

The present invention is a double container cap mounted on a double container body comprising an inner layer body for containing contents and a squeezable outer layer body for containing the inner layer body,
A cap body having a pouring hole for pouring contents from the inner layer body, and attached to the mouth of the outer layer body;
An inner plug having a partition wall positioned between the extraction hole and the inner layer body, and having a communication port through which the contents are passed,
A check valve that closes the communication port and opens the communication port due to a pressure increase in the inner layer body due to the squeeze of the outer layer body to pass the contents;
An outside air introduction valve that is opened in association with restoration by squeezing the outer layer body and introduces outside air into a space between the outer layer body and the inner layer body through an outside air introduction hole formed in the cap body,
The outside air introduction valve has a thin annular valve body, the outer peripheral side end of the valve body is supported by an elastic arm so as to be vertically displaceable, and the outer peripheral side end is seated on the cap body. It is a double container cap which closes the outside air introduction hole.

The partition wall further includes a cylindrical wall having a pour hole side opening at one end and an inner layer side opening at the other end,
It is preferable that a moving valve body movable in the vertical direction is provided in the cylindrical wall.

  Moreover, it is preferable that the said valve body has the curved shape which becomes convex at the said inner-layer body side.

  Moreover, it is preferable that the outer peripheral side edge part of the said valve body is supported by the two or more said elastic arms.

  In addition, an annular wall surrounding the communication port and the outlet hole side opening is further provided, the check valve is integrally provided on an inner peripheral surface of the annular wall, and the outside air introduction valve is an outer periphery of the annular wall. It is preferable to be provided integrally on the surface.

  According to the double container cap of the present invention, the outside air introduction valve can be stably operated.

It is sectional drawing which shows the state which mounted | wore the double container main body with the cap for double containers which concerns on one Embodiment of this invention. It is a top view which shows the coupling valve used for the cap for double containers which concerns on one Embodiment of this invention.

  Hereinafter, the present invention will be described more specifically with reference to the drawings.

  FIG. 1 shows a state in which a double container cap 1 according to an embodiment of the present invention is mounted on a double container main body 2 adapted to the cap. The double container cap 1 includes a cap body 10, an inner stopper 20, a moving valve body 30, a coupling valve 40, and a lid body 50. The double container body 2 includes an inner layer body 3 and an outer layer body 4. In the present specification, claims, abstract, and drawings, the side on which the lid 50 described later is located is the upper side (upper side in FIG. 1), and the side on which the double container body 2 is located is the lower side (FIG. 1). Lower side).

  First, the double container body 2 will be described. In the present embodiment, the double container main body 2 is formed by extruding and blowing a delamination container on a parison formed by laminating the synthetic resin material of the inner layer body 3 and the synthetic resin material of the outer layer body 4. Forming. And the material of the inner layer body 3 which comprises the double container main body 2 uses ethylene-vinyl alcohol copolymer resin (EVOH) or nylon. Further, the material of the outer layer body 4 is made of low density polyethylene (LDPE) or high density polyethylene resin (HDPE). In particular, when LDPE is used, high squeeze properties can be imparted. However, the present invention is not limited to this mode. For example, when forming a delamination container by performing biaxial stretch blow molding, polypropylene (PP) is used as the material of the inner layer body 3, and the material of the outer layer body 4 is used. Polyethylene terephthalate (PET) may be used. Further, as the material of the inner layer body 3 and the outer layer body 4, other resins having low compatibility with each other can be used. Further, the double container main body 2 may be formed by assembling the outer layer body 4 and the inner layer body 3 separately instead of the laminated peeling container. Although not shown, one or a plurality of adhesive bands extending in the vertical direction and partially joining the inner layer body 3 and the outer layer body 4 between the inner layer body 3 and the outer layer body 4. May be provided.

  The inner layer body 3 is formed so as to be capable of volume reduction deformation. In this embodiment, the inner layer body 3 is obtained by peeling the double container body 2 formed in a laminated state from the outer layer body 4. . The inner layer body 3 includes an accommodation space S that accommodates contents inside and an upper opening 3 a that is connected to the accommodation space S.

  The outer layer body 4 is configured by connecting a cylindrical mouth peripheral wall 4a with a reversible flexible trunk (not shown) and a bottom for closing the lower end of the trunk. A male screw portion 4b is provided on the outer peripheral surface of the mouth peripheral wall 4a. Further, the mouth peripheral wall 4a is provided with a through hole 4c for taking in air between the inner layer body 3 and the outer peripheral surface provided with the through hole 4c is provided with a male screw part 4b in the vertical direction. A notched groove 4d is provided.

  Next, the cap main body 10 is demonstrated regarding the cap 1 for double containers. The cap body 10 includes an outer peripheral wall 11 surrounding the mouth peripheral wall 4a, and an internal thread portion 12 corresponding to the male screw portion 4b of the mouth peripheral wall 4a is formed on the inner peripheral surface of the outer peripheral wall 11. A top wall 13 is integrally connected to the upper portion of the outer peripheral wall 11. A pouring tube 14 is provided on the top surface of the top wall 13, and an pouring hole 14 a for pouring the contents is formed on the inner peripheral surface of the pouring tube 14. In addition, a pair of upper fitting walls 15 having a concentric double arrangement is provided on the lower surface of the top wall 13. Further, an outside air introduction hole 16 penetrating the top wall 13 is provided on the outer side in the radial direction from the upper fitting wall 15. In the present embodiment, a step is provided between the central portion and the outer peripheral portion of the top wall 13 (the outer peripheral portion has a lower height than the central portion), and the step opens toward the radially outer side. Thus, the outside air introduction hole 16 is provided. By configuring in this way, the contents overflowing on the top wall 13 become difficult to enter the outside air introduction hole 16. Note that the lower end of the outer peripheral wall 11 is in airtight contact with the mouth peripheral wall 4a, and an air passage T leading to the through hole 4c is provided between the mouth peripheral wall 4a and the outer peripheral wall 11.

  In addition, in this embodiment, although it has comprised so that the groove part 4d which notches the male screw part 4b to an up-down direction may be used as the ventilation path T, it is not limited to this aspect. The gap between the male screw portion 4b and the female screw portion 12 may be used as the air passage T without providing the groove portion 4d.

  As shown in FIG. 1, a ring-shaped protrusion 18 protrudes on the side opposite to the extraction tube 14 with respect to the top wall 13. The protrusion 18 regulates upward displacement of a check valve valve body 43a described later.

  An inner plug 20 is provided inside the cap body 10. The inner plug 20 includes a partition wall 21 that is located between the pouring hole 14 a and the inner layer body 3 and covers the upper opening 3 a of the inner layer body 3.

  The partition wall 21 has a cylindrical opening having an opening on the outlet hole 14a side opened on the outlet hole 14a side at one end and an opening on the inner layer body 3 side opened on the accommodation space S side of the inner layer body 3 on the other end. A wall 22 is provided. As shown in FIG. 1, the cylindrical wall 22 of the present embodiment is provided with a through hole 22 a in a part of the partition wall 21, and the cylindrical portion 22 b extends from the edge of the through hole 22 a toward the accommodation space S. A cylindrical portion having a through hole 22d at the lower end via the inclined portion 22c. In the present embodiment, the opening on the extraction hole 14a side corresponds to the through hole 22a, and the opening on the inner layer body 3 side corresponds to the through hole 22d. Further, the partition wall 21 is provided with a hole (communication port 23) penetrating the partition wall 21 adjacent to the cylindrical wall 22. In the present embodiment, the communication ports 23 are provided at three locations adjacent to one cylindrical wall 22, but the numbers of the communication ports 23 and the cylindrical walls 22 are not limited to this mode. Here, as for the relationship between the total opening area of the inner wall 3 side opening (through hole 22d) in the cylindrical wall 22 and the total opening area of the communication port 23, the total opening area of the communication port 23 is preferably larger. However, it is not necessarily limited to this. Note that the total opening area refers to the sum of the areas when there are a plurality of openings of the same type.

  Further, the partition wall 21 includes a step portion 24 that is bent radially outward from the communication port 23 toward the accommodation space S, and a groove that is open upward from the step portion 24 is formed radially outward from the step portion 24. A fitting wall 25 to be formed is provided. An annular seal wall 26 that sandwiches the inner layer body 3 with the outer layer body 4 is provided on the lower surface of the partition wall 21. As shown in FIG. 1, at least one groove 27 is provided on the outer edge of the partition wall 21.

  In the cylindrical wall 22, a moving valve body 30 that is spherical in this embodiment is provided. Between the cylindrical wall 22 and the moving valve body 30, the moving valve body 30 can be moved in accordance with the change in the posture of the double container body 2, and the contents are hardly passed (substantially not passed). A gap is provided. In addition, since the extraction hole 14a side of the cylindrical wall 22 is opened by the through-hole 22a, and the accommodation space S side is opened by the through-hole 22d, the contents that have entered the cylindrical wall 22 are moved to the transfer valve. The movement of the body 30 is not hindered. In addition, the movable valve body 30 makes the double container main body 2 stand up (an attitude in a state where the bottom of the double container main body 2 is placed on a horizontal base), whereby the inclined portion 22c of the cylindrical wall 22 is formed. Sit on. As a result, the accommodation space S can be sealed.

  A check valve 43 is provided between the cap body 10 and the inner plug 20. As shown in FIG. 2, the check valve 43 is provided on the radially inner side of the cylindrical annular wall 41 as a part of the coupling valve 40. As shown in FIG. 2, the check valve 43 is a so-called three-point valve having a structure in which three portions on the outer peripheral edge of a disc-like check valve valve body 43 a are supported by a check valve arm 43 b. When the pressure in the inner layer body 3 increases due to the squeeze of the outer layer body 4, the check valve body 43 a is lifted upward in FIG. 1 against the elastic force of the check valve arm 43 b, and from the partition wall 21. By separating, the check valve 43 is opened. When the squeeze of the outer layer body 4 is released, no pressure is applied to the check valve valve body 43a. Therefore, the check valve valve body 43a again comes into contact with the partition wall 21 due to its own weight and the elastic force of the check valve arm 43b. The stop valve 43 is closed.

  In the present embodiment, the check valve body 43a is constituted by a disk-shaped member, but is not limited to this aspect, and may be a member having a rectangular shape or the like. The check valve 43 is not necessarily a three-point valve, and various valves that are opened by the positive pressure in the inner layer body 3 such as a two-point valve or a thin annular valve can be used.

  On the other hand, an outside air introduction valve 45 is provided on the radially outer side of the annular wall 41 as shown in FIGS. 1 and 2. The outside air introduction valve 45 is formed on the radially outer side of the annular wall 41 to form an annular and thin valve body 45a. The valve body 45 a closes the outside air introduction hole 16 by connecting the inner peripheral end to the outer peripheral surface of the annular wall 41 and seating the outer peripheral end on the lower surface of the top wall 13 of the cap body 10. Further, as shown in FIG. 2, the outer peripheral side end of the valve body 45a is supported by two elastic arms 45b at two opposite locations on the circumference. As can be seen from FIG. 1, the annular valve body 45 a is formed in a curved shape that is convex toward the inner layer body 3 side. By adopting this curved shape, the valve body 45a can reliably maintain the outside air introduction valve 45 in a closed state until a predetermined negative pressure is applied. The outer peripheral end of the elastic arm 45 b is supported by an annular peripheral wall 47. The peripheral wall 47 is fitted to the inner peripheral surface of the cap body 10, and is sandwiched and fixed from above and below by the lower surface of the top wall 13 and the upper surface of the partition wall 21.

  Thus, in the present embodiment, the valve body 45a constituting the outside air introduction valve 45 is formed of a thin annular member, and the outer peripheral side end of the valve body 45a is supported by the elastic arm 45b. Therefore, since the outer peripheral side end of the valve body 45a is not a complete free end as in Patent Document 1, when heat filling is performed in the double container main body 2, the outer peripheral side end of the valve body 45a is heated. Can be suppressed. Moreover, since the outer peripheral side end of the valve body 45a is elastically supported, vibration generated in the valve body 45a when introducing outside air can be absorbed by the elastic arm 45b.

  In the present embodiment, the valve body 45a is configured to be supported by the elastic arms 45b at two locations. However, the number of the elastic arms 45b is not limited, and may be configured to be supported at three or more locations, for example. Good. The elastic arms 45b are preferably arranged at equal intervals in the circumferential direction, but are not limited thereto.

  Further, in the present embodiment, the check valve 43 and the outside air introduction valve 45 are configured to be provided integrally with the annular wall 41, but the present invention is not limited to this aspect. For example, the check valve 43 may be provided on the first annular wall and the outside air introduction valve 45 may be provided on the second annular wall. The check valve 43 and the outside air introduction valve 45 may be fixed to other than the annular wall 41.

  In the present embodiment, even when the check valve valve body 43a is closed, the through hole 22a and the extraction hole 14a communicate with each other through gaps on both sides of the check valve arm 43b in the width direction. Thereby, the through-hole 22a of the cylindrical wall 22 is always opened. When the check valve 43 is attached to the cap body 10 and the inner plug 20 as shown in FIG. 1, the lower portion of the annular wall 41 is fitted and held between the step portion 24 and the fitting wall 25. The upper part of the wall 41 is fitted and held by a pair of upper fitting walls 15. As a result, as shown in FIG. 1, an inner space K <b> 1 is formed on the radially inner side of the annular wall 41 so as to form a flow path for the contents by communicating the communication port 23 and the extraction hole 14 a. On the radially outer side of the wall 41, an outer space K <b> 2 is formed in which an outside air introduction hole 16 and the groove 27 are communicated to form an air flow path.

  As shown in FIG. 1, the lid 50 is connected to the outer peripheral wall 11 of the cap body 10 via a hinge 51, and covers the pouring hole 14 a and the outside air introduction hole 16 by being bent by the hinge 51. Can do. More specifically, the lid 50 includes a flat plate-like upper wall 52 and a lid peripheral wall 53 that is connected to the edge of the upper wall 52 and is continuous with the outer peripheral wall 11. Further, the upper wall 52 is provided with a cylindrical seal portion 54 that enters the inside of the extraction cylinder 14 and seals the extraction hole 14a when the lid 50 is closed. A gripping portion 58 protruding in the outer peripheral direction is provided at the upper end of the lid peripheral wall 53 on the side facing the hinge 51 on the circumference. The user grips the gripping portion 58 and holds the lid 50. It can be lifted upward to open it, or it can be pushed down to close it. When the lid 50 is closed, the inner peripheral surfaces of the lid peripheral wall 53 and the inner peripheral wall 56 are respectively undercut engaged with the protruding wall 11a and the top wall step portion 13a, so that the lid 50 is the cap body. 10 engages securely. Note that the lid 50 may be configured separately from the cap body 10 without providing the hinge 51, and may be configured to be attached to the cap body 10 with screws or undercuts.

  In discharging the contents from the double container cap 1 configured as described above, the lid 50 is opened from the state shown in FIG. 1, and the posture of the double container body 2 is changed from the standing posture to the tilting posture. The body part of the outer layer body 4 is pressed (squeezed). Thereby, the moving valve body 30 in the cylindrical wall 22 moves to the extraction hole 14a side, and the accommodation space S is pressurized via the air between the inner layer body 3 and the outer layer body 4. Note that when the body portion of the outer layer body 4 is being pressed, pressure is also applied to the valve body 45a from below through the through hole 4c, the air passage T, and the groove 27, so the outside air introduction valve 45 is maintained in a closed state. The Therefore, even if the outer layer body 4 is pressed, the air between the inner layer body 3 and the outer layer body 4 does not leak out from the outside air introduction hole 16, and the pressurization to the accommodation space S is not hindered. And since the positive pressure in the storage space S lifts the check valve valve body 43a, the content flows out from the communication port 23 and is poured out from the pouring hole 14a via the inner space K1. Here, since the total opening area of the communication port 23 is made larger than the total opening area of the opening (through hole 22d) on the inner layer body 3 side in the cylindrical wall 22, when the contents flow, The resistance is reduced and can be poured smoothly.

  The movable valve body 30 accommodated in the cylindrical wall 22 moves to the outlet hole 14a side when the double container body 2 is in an inverted posture and the body portion of the outer layer body 4 is pressed. Jumping out of the cylindrical wall 22 is prevented by contacting the portion 22e.

  After the required amount of content has been poured out, the pressure on the body of the outer layer body 4 is released. As a result, the positive pressure in the storage space S returns to the external pressure, and the check valve body 43a closes the communication port 23 again, so that the entry of outside air into the storage space S can be prevented. Further, since the outer layer body 4 tries to return to its original shape by its own restoring force, the space between the inner layer body 3 and the outer layer body 4 becomes a negative pressure. As a result, the pressure below the outside air introduction valve 45 also becomes negative through the through-hole 4c, the air passage T, and the groove 27, so that the valve body 45a is pulled downward and the outside air introduction valve 45 is opened. With the opening of the outside air introduction valve 45, air flows from the outside air introduction hole 16, and the space between the outer layer body 4 and the inner layer body 3 from the through hole 4c via the outer space K2, the groove 27, and the air passage T. Air is introduced into the. Thereby, the outer layer body 4 can be restored while the inner layer body 3 is deformed and deformed.

  When the check valve body 43a closes the communication port 23, the contents remain in the pouring cylinder 14 and the inner space K1, but the double container body 2 is returned to the original standing posture. The moving valve body 30 moves to the accommodation space S side of the inner layer body 3 due to its own weight or the like. As a result, a space is generated on the side of the extraction hole 14a in the cylindrical wall 22, so that the content remaining in the extraction cylinder 14 and the inner space K1 is transferred to the side of the cylindrical wall 22 through the through hole 22a. It can be moved (suck back function), and dripping can be effectively prevented.

  As described above, according to the present embodiment, a thin annular valve body is employed as the valve body 45a of the outside air introduction valve 45, and the outer peripheral side end of the valve body 45a is supported by the elastic arm 45b so as to be vertically movable. Configured to be. Thereby, since the outer peripheral side end portion of the valve body 45a is not a complete free end, it is possible to prevent the valve body 45a from being deformed by heat when the double container body 2 is heat-filled. . Moreover, since the outer peripheral side end of the valve body 45a is elastically supported, the vibration generated in the valve body 45a when the outside air is introduced can be absorbed by the elastic arm 45b.

  Further, according to the present embodiment, when the partition wall 21 is provided with the cylindrical wall 22 and the double container main body 2 is returned from the inverted posture to the standing posture, the movable valve body 30 in the cylindrical wall 22 has its own weight. It was configured to move from the pouring hole 14a side to the inner layer body 3 side. Thereby, the contents in the pouring cylinder 14 and the inner space K1 can be pulled back to the inner layer body 3 side by the suck back function.

  Further, according to the present embodiment, the valve body 45a of the outside air introduction valve 45 is configured to have a curved shape that is convex toward the inner layer body 3 side. Thus, the outside air introduction valve 45 can be kept closed until a predetermined negative pressure is applied.

  Moreover, according to this embodiment, it comprised so that the valve body 45a of the external air introduction valve 45 might be supported by the 2 or more elastic arms 45b in an outer peripheral side edge part. Thereby, the outer peripheral side end of the valve body 45a is supported in a balanced manner, and unintended inclination and deformation of the valve body 45a can be suppressed.

  Moreover, according to this embodiment, since the check valve 43 and the outside air introduction valve 45 are integrally provided with respect to the annular wall 41, the number of parts can be reduced and the number of assembling steps of the double container cap 1 can be reduced. Can do.

  The double container cap 1 according to the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope according to the claims. For example, the cross-sectional shape of the moving valve body 30 can be appropriately changed according to the cross-sectional shape of the cylindrical wall 22. Further, the cylindrical wall 22 and the moving valve body 30 are not necessarily provided. Further, the outer layer body 4 and the inner layer body 3 are not limited to those formed by blow molding a parison having a laminated structure, and the outer layer body 4 and the inner layer body 3 are individually formed, and then the inner layer body 3 is formed as the outer layer body. 4 may be installed.

  According to the present invention, it is possible to provide a novel double-container cap 1 in which the outside air introduction valve 45 can be stably operated.

DESCRIPTION OF SYMBOLS 1 Double container cap 2 Double container main body 3 Inner layer body 3a Upper opening 4 Outer layer body 4a Mouth part peripheral wall (mouth part)
4b Male thread part 4c Through hole 4d Groove part 10 Cap body 11 Outer wall 11a Projection wall 12 Female thread part 13 Top wall 13a Top wall step part 14 Extraction cylinder 14a Extraction hole 15 Upper fitting wall 16 Outside air introduction hole 18 Projection 20 Middle plug 21 Bulkhead 22 Cylindrical wall 22a Through hole (opening hole side opening)
22b Cylindrical portion 22c Inclined portion 22d Through hole (inner layer side opening)
22e Protruding portion 23 Communication port 24 Step portion 25 Fitting wall 26 Seal wall 27 Groove 30 Moving valve body 40 Coupling valve 41 Annular wall 43 Check valve 43a Check valve valve body 43b Check valve arm 45 Outside air introduction valve 45a Valve body 45b Elastic arm 47 Peripheral wall 50 Lid 51 Hinge 52 Upper wall 53 Lid peripheral wall 54 Sealing part 56 Inner peripheral wall 58 Gripping part K1 Inner space K2 Outer space S Storage space T Air passage

Claims (5)

A double container cap mounted on a double container body comprising an inner layer body for containing contents and a squeezable outer layer body for containing the inner layer body,
A cap body having a pouring hole for pouring contents from the inner layer body, and attached to the mouth of the outer layer body;
An inner plug having a partition wall positioned between the extraction hole and the inner layer body, and having a communication port through which the contents are passed,
A check valve that closes the communication port and opens the communication port due to a pressure increase in the inner layer body due to the squeeze of the outer layer body to pass the contents;
An outside air introduction valve that is opened in association with restoration by squeezing the outer layer body and introduces outside air into a space between the outer layer body and the inner layer body through an outside air introduction hole formed in the cap body,
The outside air introduction valve has a thin annular valve body, the outer peripheral side end of the valve body is supported by an elastic arm so as to be vertically displaceable, and the outer peripheral side end is seated on the cap body. A double container cap for closing the outside air introduction hole. The partition further comprises a cylindrical wall having an opening on the outlet side on one end and an inner layer side opening on the other end,
The double container cap according to claim 1, wherein a moving valve body movable in the vertical direction is provided in the cylindrical wall.   The double container cap according to claim 1, wherein the valve body has a curved shape that protrudes toward the inner layer body.   The double container cap according to any one of claims 1 to 3, wherein an outer peripheral side end portion of the valve body is supported by two or more elastic arms.   An annular wall surrounding the communication port and the outlet hole side opening is further provided, the check valve is integrally provided on an inner peripheral surface of the annular wall, and the outside air introduction valve is provided on an outer peripheral surface of the annular wall. The cap for double containers as described in any one of Claims 1 thru | or 4 provided integrally.

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