JP6501698B2 - Double container cap - Google Patents

Description

  The present invention pours out the contents attached to the mouth of the outer layer body and contained in the inner layer body to a double container provided with the volume-reducible inner layer body and the outer layer body on which the inner layer body is disposed inside Relates to a double container cap.

  As a container for containing cosmetics such as lotions, shampoos and rinses, liquid soaps, food seasonings, etc., an inner layer body that accommodates such contents and can be reduced in volume and deformed, and the inner layer body A double container is known which comprises an outer layer which encloses the inner side and which forms the shell of the container. In this double container, there is a delamination container (laminated peeling container) formed by laminating the outer layer and the inner layer from the beginning and a container of a type in which the outer layer and the inner layer are separately formed and assembled. In addition, the delamination container is made by sandwiching a heated and melted laminated parison with a mold and blowing air into the interior to form a laminated container by EBM (Extrusion Blow Molding: extrusion blow molding), an outer layer and an inner layer. There is a thing by biaxial stretch blow molding which forms a lamination container from the preform (container material) formed in the bottomed cylindrical shape equipped. In such a double container, a cap for a double container is generally provided at the mouth of the outer layer body with a pouring cylinder for pouring out contents and a check valve for preventing the entry of outside air into the inner layer body. Is attached. Then, by pressing the outer layer body, the inner layer body is pressurized via air between the outer layer body and the inner layer body, whereby the valve body of the check valve is opened to pour out the contents. Further, the outer layer body is provided with a through hole for taking in the outside air between it and the inner layer body, and when the outer layer body is restored to the original shape after pouring out, the outside air is taken in from the through hole and the inner layer body is Only the outer layer is restored while being reduced in volume.

  By the way, for the check valve for preventing the outside air from invading the inner layer body in the above-mentioned double container cap, for example, via the three arms radially inward of the cylindrical annular wall as disclosed in Patent Document 1 A flat plate-like valve body connected is used. In this type of check valve, the air between the outer layer body and the inner layer body is compressed by pressing the outer layer body, and the pressure rise accompanying this causes the valve body to be pushed up in the direction of the dispensing cylinder to form the inner layer body. The communicating port can be opened to pour out the contents. In addition, when the outer layer is restored to the original shape after pouring out the contents, the pressure of air between the outer layer and the inner layer is reduced, and the valve is closed by the pressure difference and the elastic force of the three arms. Return to position.

JP, 2013-151316, A

  However, in the check valve of the above structure, for example, when the content such as powdery or granular seasoning is filled in the inner layer body, the valve when the valve body in the open state returns to the closed state is a valve The contents get in between the body and the septum and the valve body can not return to a completely closed state. In such a case, air is introduced into the inner layer body after the discharge of the contents is completed, and therefore, when the outside is humid environment, the moist air remains in the inner layer body, and the powder of the contents is There is a problem that it becomes easy to oxidize or absorb moisture and solidify.

  An object of the present invention is to solve such a problem, and an object thereof is to provide a double container capable of easily discharging air that has entered the inner layer with the lid closed. It is providing a cap for.

The present invention is a dual container cap attachable to a dual container body having an inner layer body and an outer layer body having the inner layer body disposed inside,
A cap body having a pouring hole for pouring out the contents from the inner layer body which can be reduced in volume, and mounted on the mouth of the double container body;
An openable and closable lid covering the pouring hole;
The lid includes a lid body attached to the cap body, a plug body supported so as to be vertically displaceable with respect to the lid body, and one direction capable of discharging the air in the inner layer to the outside. With a valve,
When the lid is closed from the opened state, the plug abuts on the engaging portion provided on the cap body, and the concave groove provided on at least one of the plug and the engaging portion, and the groove It is a cap for double containers characterized by being positioned at a discharge position where air in the inner layer can be discharged to the outside via a one-way valve.

  Preferably, the plug is positioned at a storage position where air in the inner layer can not be discharged to the outside by engaging the plug with the engaging portion from the discharge position.

  Moreover, it is preferable that the said engaging part is a pouring pipe | tube which covers the circumference | surroundings of the said pouring hole.

  Moreover, it is preferable that the said one way valve will be in an obstruction | occlusion state, when a valve body contact | abuts on the said plug.

  Moreover, it is preferable that the said one way valve is provided concentrically with the said plug.

  Preferably, the lid further includes an upper lid covering the one-way valve from above.

  The double container cap of the present invention makes it possible to easily discharge the air that has entered the inner layer with the lid closed.

(A) is front sectional drawing which shows the state (storage position) which attached the double container cap which concerns on one Embodiment of this invention to the double container. It is front sectional drawing which shows the state which opened the cover body of the cap for double containers which concerns on one Embodiment of this invention. (A) is a front sectional view which shows the state (discharge position) which closed the lid after discharge of the content in the cap for double containers which concerns on one Embodiment of this invention, (b), (a) ) Is an enlarged cross-sectional view of part A of FIG.

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

  FIG. 1 shows a dual container cap 1 according to an embodiment of the present invention attached to a dual container body 2 compatible therewith. In the specification, claims, abstract, and drawings, the side on which the lid 20 described later is located is the upper side (upper side in FIG. 1), and the side on which the double container main body 2 is positioned is the lower side (FIG. 1). On the lower side of The double container cap 1 includes a cap body 10 and a lid 20. Further, the double container main body 2 is configured by the inner layer body 3 and the outer layer body 4. In addition, FIG. 1 has shown the state (storage position) of the cap 1 for double containers at the time of storage.

  First, the double container body 2 will be described. In this embodiment, the double container main body 2 is formed by laminating the synthetic resin material of the inner layer body 3 and the synthetic resin material of the outer layer body 4 and performing extrusion blow molding on the parison. It is forming. And, ethylene-vinyl alcohol copolymer resin (EVOH) or nylon is used as a material of the inner layer body 3 constituting the double container main body 2. In addition, low density polyethylene (LDPE) or high density polyethylene resin (HDPE) is used as the material of the outer layer body 4, and particularly when LDPE is used, high squeezability can be imparted. However, the present invention is not limited to this embodiment. For example, in the case of forming a peeling container by performing biaxial stretch blow molding, polypropylene (PP) is used as the material of the inner layer 3 and the material of the outer layer 4 is used. Polyethylene terephthalate (PET) may be used. Further, as the materials of the inner layer body 3 and the outer layer body 4, other resins having low mutual compatibility can be used. Further, the double container main body 2 may be assembled by separately forming the outer layer body and the inner layer body instead of the laminated peeling container.

  The inner layer body 3 is formed so as to be capable of reducing the volume, and in the present embodiment, is obtained by peeling the double container main body 2 formed in the laminated state from the outer layer body 4 . The inner layer body 3 is provided with an accommodation space S for accommodating the contents inside thereof.

  The outer layer body 4 is a cylindrical mouth peripheral wall 4a connected to a resilient flexible body (not shown) and a bottom (not shown) for closing the lower end of the body. . As shown in FIG. 1, on the outer peripheral surface of the mouth peripheral wall 4a, a container rib 4b opposed to a cap rib 12a provided on the inner peripheral surface of the outer peripheral wall 11 of the cap main body 10 described later is provided. Further, a neck ring 4g is provided below the container rib 4b.

  In FIG. 1, when the outer layer 4 is restored to its original shape by its own rigidity after reducing the volume of the inner layer 3 by pressing the body portion of the outer layer 4, the outer layer 4 and the inner layer 3 The space between them is under pressure. At this time, air is introduced into the space between the outer layer 4 and the inner layer 3 from the slit formed in the pinch-off portion of the bottom of the double container body 2 formed by blow molding.

  Next, the cap main body 10 which comprises the double container cap 1 is demonstrated using FIG. The cap body 10 is provided with an outer peripheral wall 11 surrounding the mouth peripheral wall 4a, and a cap rib 12a facing the container rib 4b of the mouth peripheral wall 4a is formed on the inner peripheral surface of the outer peripheral wall 11. Further, below the cap rib 12a, an inner wall projection 12b for undercut engagement of the cap body 10 with the mouth peripheral wall 4a is provided. Then, when the cap body 10 is pushed into the mouth 2a from above, the inner wall projection 12b of the cap body 10 rides over the container rib 4b of the mouth peripheral wall 4a, and the mouth upper end 2b of the double vessel main body 2 It abuts on the lower surface of the top wall 19 of the cap body 10. Thereby, the cap body 10 is firmly fixed in the vertical direction with respect to the opening 2a. At this time, since the cap rib 12a provided intermittently in the circumferential direction is inserted between the container ribs 4b similarly provided intermittently as well, the cap body 10 rotates in the circumferential direction also with respect to the opening 2a. It is fixed in the stop state.

  A top wall 19 is integrally connected to an upper portion of the outer peripheral wall 11 of the cap body 10. A pouring cylinder 14c is disposed at the central portion of the top wall 19, and an opening passing through the pouring cylinder 14c is provided as a pouring hole 14a for pouring contents. In addition, the engagement protrusion 14d which can be engaged with the plug body 32 mentioned later is provided in the upper end of the pouring pipe | tube 14c. In addition, the inner circumferential wall 18 hangs downward from the lower surface of the top wall 19. When the cap body 10 is undercut and engaged with the opening 2a, the upper end 2b of the opening abuts on the lower surface of the top wall 19, and the outer peripheral surface of the inner peripheral wall 18 fits on the inner peripheral surface of the opening 2a. As a result, the mouth 2a is well sealed by the top wall 19 and the inner circumferential wall 18, and the contents in the double container body 2 are discharged to the outside only from the pouring hole 14a.

  On the outer peripheral surface of the outer peripheral wall 11 of the cap body 10, a cap male screw portion 15 for mounting a lid body 30 described later by screw engagement is provided. Further, the cap main body 10 is provided with a fitting wall 16a extending downward at a position further in the outer circumferential direction of the outer peripheral wall 11, and when the lid body 30 is attached, the fitting wall 16a is a portion of the lid peripheral wall 33. Fit on the inner circumferential surface to stabilize mounting. In addition, a lid stopper 16b protruding in the outer peripheral direction is provided at the lower end of the fitting wall 16a, and when the lid main body 30 is mounted on the cap main body 10, contact with the lid stopper 16b. Determines the mounting position in the vertical direction.

  As shown in FIG. 1, the lid 20 is a lid body 30 fixed to the cap body 10, a plug 32 supported so as to be vertically displaceable with respect to the lid body 30, and an inner layer body And a one-way valve 50 capable of exhausting the air in 3 to the outside. A lid peripheral wall 33 is provided on the lid body 30 so as to surround the outer peripheral wall 11 of the cap body 10, and an inner peripheral surface of the lid peripheral wall 33 is a female thread for screw engagement with the cap body 10. The part 34 is provided. Then, when the lid body 30 is attached to the cap body 10, the lower end of the lid peripheral wall 33 abuts on the lid stopper 16b described above, and the lid 20 is positioned with respect to the cap body 10.

  At the upper end of the lid peripheral wall 33, an upper wall 31 for accommodating a one-way valve 50 and a plug 32 described later is provided. An outer wall groove portion 31 f for accommodating and fixing the valve wall 52 of the one-way valve 50 is provided on an outer peripheral portion adjacent to the lid peripheral wall 33 in the upper wall 31. A groove projection 31g for undercut engagement of the valve wall 52 is provided on the outer peripheral side of the upper wall groove 31f. The one-way valve 50 has a valve body 51 having a thin disc shape having an opening at the center, and is concentrically disposed with a plug 32 described later. And the outer peripheral end of the valve body 51 is supported by the upper end of the valve wall 52 which has a cylindrical side surface shape. A valve wall projection 53 is provided on the outer peripheral surface of the valve wall 52, and the one-way valve 50 is inserted into the upper wall groove portion 31f while pressing the valve wall 52 downward, thereby the lid body 30 can be fixed by undercut engagement. In the present embodiment, the projections are provided on the outer peripheral side of the upper wall groove 31f and the valve wall 52, and the projections are not provided on the inner peripheral side. However, the present invention is not limited to this aspect. A protrusion may be provided on the inner peripheral side in addition to the outer wall side of the upper wall groove 31f and the valve wall 52, or a protrusion may be provided on the side of the upper wall groove 31f and a protrusion is provided on the valve wall 52 side. It does not have to be. Further, the upper wall groove 31 f and the valve wall 52 may be fixed by screw engagement.

  An inner peripheral wall 35 extending in the vertical direction and accommodating the plug body 32 is provided closer to the center of the upper wall 31 than the upper wall groove 31f. The inner circumferential wall 35 is connected to the upper wall 31 at the inner peripheral end of the upper wall 31 via a central upper wall 31 j extending in the radial direction and an upper wall step 31 h extending in the vertical direction. The inner peripheral wall 35, as shown in FIG. 1, forms a space with the pouring barrel 14c, and the plug peripheral wall 32c of the plug 32 is configured to be vertically movable in this space. ing. When the lower end of the lid peripheral wall 33 abuts on the upper surface of the lid stopper 16 b by screwing the lid body 30 to the cap body 10, the lower end of the inner peripheral wall 35 is also on the upper surface of the top wall 19. Abut. As a result, when the plug 32 moves to the discharge position shown in FIG. 3A, a flow path R for guiding the air inside the inner layer 3 to the outside is formed.

  The plug 32 has a top wall 32a for the user to press the plug 32, a plug stepped portion 32b which descends downward from the outer peripheral end of the top wall 32a, and a peripheral direction further from the lower end of the plug stepped portion 32b. And a plug peripheral wall 32c extending downward from the outer peripheral end of the plug base 32e. The valve body abutting surface 32f is formed on the upper surface of the plug body base 32e, and the one-way valve 50 is formed by the inner peripheral end of the valve body 51 of the one-way valve 50 abutting on the valve body abutting surface 32f. Keep closed. A plug stopper 32g is provided on the outer peripheral side of the lower end of the plug peripheral wall 32c, and the upper surface of the plug stopper 32g is displaced when the plug 32 is displaced upward as shown in FIG. 3A. It abuts on the lower surface of the stopper rib 35a provided on the upper end of the inner peripheral wall 35, and regulates the upward displacement of the plug 32. On the other hand, when the plug 32 is displaced downward, as shown in FIG. 1, a plug projection 32h provided on the lower surface of the plug base 32e abuts on the upper end of the pouring barrel 14c. Thus, the downward displacement of the plug 32 is restricted and the air in the inner layer 3 can not be discharged to the outside. Since the lower surface of the plug rib 32j provided on the outer surface of the plug base 32e also abuts on the upper surface of the central upper wall 31j when the plug projection 32h abuts on the upper end of the dispensing cylinder 14c, the plug The body 32 can maintain the state shown in FIG. 1 more stably. The plug 32 is vertically displaceable while sliding the inner peripheral surface of the plug peripheral wall 32c on the engagement projection 14d of the pouring barrel 14c.

  The plug rib 32j, the stopper rib 35a, and the plug stopper 32g are intermittently provided in the circumferential direction, and the air in the inner layer 3 is a flow path at the discharge position shown in FIG. 3A. It is disposed to be able to be discharged to the outside via the members in R.

  As shown in FIG. 1, an upper lid 40 is provided above the lid body 30. The upper lid 40 is connected to the upper end of the lid peripheral wall 33 by a hinge 38 at the outer peripheral end. An upper lid projection 40 b is provided on the lower surface inner peripheral side of the upper lid 40, and an engagement projection 31 d and an undercut engagement are provided at the tip of the upper wall projection 31 e projecting from the upper end of the lid peripheral wall 33. Then, the upper lid 40 is maintained closed with respect to the lid body 30. As a result, the one-way valve 50 is always covered by the upper lid 40, so that the one-way valve 50 can be protected from scratches, dirt and the like. Further, since the diameter of the upper lid opening 40d provided at the center of the upper lid 40 is smaller than the diameter of the plug peripheral wall 32c of the plug 32, the plug 32 is engaged even if an unexpected external force is applied. The engagement between the projections 14 d and 32 d is not released, and the plug 32 is not detached from the lid 20. In addition, since fixing of the upper lid 40 to the lid body 30 is not supposed to be removed except at the time of washing, the strength of the undercut engagement should be increased so that the user does not accidentally open it. Is desirable.

  In the present embodiment, the lid body 30 is attached to the cap body 10 by screw engagement, but is not limited to this aspect. For example, the lid body 30 may be integrally formed with the cap body 10 via a hinge, or the like, and may be configured to be attached by further connecting means.

  Further, in the present embodiment, the upper lid 40 is integrally formed with the lid body 30 via the hinge 38, but is not limited to this aspect. For example, the upper lid 40 may be configured separately from the lid body 30, and may be configured to be connected by additional connecting means. The upper lid 40 may be configured to be attached to the lid body 30 by, for example, a screw or an undercut. Further, the upper lid 40 may not be provided.

  Next, a method of discharging contents using the double container cap 1 of the present embodiment will be specifically described.

  FIG. 1 shows the state of the storage position in which the air in the inner layer 3 is not discharged from the pouring hole 14a. Specifically, the plug peripheral wall 32c of the plug 32 engages with the dispensing cylinder 14c without a gap, and the plug projection 32h provided on the lower surface of the plug base 32e abuts on the dispensing cylinder 14c. The air in the inner layer 3 can not pass through the flow passage R between the pouring barrel 14 c and the inner circumferential wall 35. Thus, the air in the inner layer 3 does not leak to the outside, and a sealed state suitable for storage can be maintained.

  FIG. 2 shows a state in which the screw engagement between the lid body 30 and the cap body 10 is released, the lid 20 is opened, and the plug 32 fitted in the pouring cylinder 14c is removed. When discharging the contents from the double container cap 1 configured as described above, the double container main body 2 is rotated from the standing posture in FIG. 2 counterclockwise to change the posture to the inclined posture. The powdery or granular contents are dropped by their own weight and discharged from the pouring hole 14a. At this time, the body portion of the outer layer body 4 is pressed, and the volume of the inner layer body 3 is reduced and deformed via air between the outer layer body 4 and the inner layer body 3 so that the inside pressure of the inner layer body 3 becomes positive pressure. Furthermore, it can discharge from the pouring hole 14a vigorously. When the inner layer body 3 is reduced in volume by deformation by pressing the body, the outer layer body 4 is restored to its original shape by its own rigidity, so a negative pressure is generated between the outer layer body 4 and the inner layer body 3. Occurs. By this negative pressure, external air is introduced into the space between the outer layer 4 and the inner layer 3 from the slit in the pinch-off portion of the bottom.

  By the way, when the contents are discharged from the pouring hole 14a, air is introduced from the pouring hole 14a into the inner layer 3 instead of the discharged contents. At this time, in the case where the outside is in a humid environment, moist air will enter into the inner layer body 3.

  When the discharge of the contents is completed, the user returns the double container body 2 from the inclined posture to the upright posture shown in FIG. Then, when the lid 20 is closed, the lower end of the plug peripheral wall 32c of the plug 32 is brought into contact with the engaging projection 14d of the pouring barrel 14c and lifted up, and the plug 32 is shown in FIG. Move to Then, along with the movement of the plug 32, the inner peripheral end of the valve 51 is also lifted upward. In FIG. 3A, the position of the valve body 51 at the storage position is indicated by a two-dot chain line.

  Next, the user presses the body of the outer layer 4 to reduce and deform the inner layer 3. As a result, the pressure in the inner layer 3 becomes positive pressure, and the air in the inner layer 3 passes upward from the pouring hole 14a as shown by the broken line arrow in FIG. It passes between the engagement projection 14d and the lower end of the plug peripheral wall 32c of the plug 32 and further passes through the flow path R in the order of the plug stopper 32g, the stopper rib 35a and the plug rib 32j. Reach 50. Then, the valve body 51 is lifted by the positive pressure of the air inside the inner layer body 3 and separated from the valve body abutting surface 32f. Thus, the air in the inner layer 3 is discharged to the outside through the gap between the valve body 51 and the valve body contact surface 32f and further through the gap between the plug 32 and the central wall 40c in the upper lid opening 40d. Ru. The lower end of the plug peripheral wall 32c is provided with a recessed groove 32k as shown in FIG. 3 (b), and the engagement projection 14d and the lower end of the plug peripheral wall 32c are shown in FIG. 3 (a), And also in the state which is in contact as shown in FIG. 3 (b), the air inside the inner layer 3 can escape between the two through the recessed groove 32 k and can be discharged from the one-way valve 50.

  In addition, in this embodiment, although the ditch | groove 32k is provided only in the plug peripheral wall 32c side, it is not limited to this aspect. The recessed groove may be provided on the side of the pouring cylinder 14c, or may be provided on both the plug peripheral wall 32c and the pouring cylinder 14c.

  Then, when the pressing of the body portion is stopped, the valve body 51 abuts on the valve body abutting surface 32 f again. Thus, the one-way valve 50 prevents air from flowing into the inner layer 3 from the outside while discharging the air in the inner layer 3. As a result, the air in the inner layer 3 is appropriately discharged to the outside, so that the powder or the like of the contents does not absorb moisture, oxidize, or solidify. At this time, since the body pressed by the rigidity of the outer layer 4 returns to the original shape, the space between the outer layer 4 and the inner layer 3 from the slit formed in the bottom by the volume of the discharged air. Air is taken in.

  When the user finishes discharging the air in the inner layer 3, the user presses the top wall 32a of the plug 32 downward. As a result, the plug 32 returns to the position shown in FIG. 1, so that the inside of the inner layer 3 can be maintained in a sealed state suitable for storage.

  As described above, according to the present embodiment, the stopper 32 is configured to be movable in the vertical direction with respect to the dispensing cylinder 14 c of the cap main body 10, and the stopper is closed when the lid 20 is closed from the opened state. The body 32 abuts on the outlet tube 14c without fitting, and the air in the inner layer 3 is provided in the plug 32 by the positive pressure by the pressing of the outer layer 4 via the concave groove 32k and the one-way valve 50 It was configured to be able to discharge to the outside. As a result, when the lid 20 is closed after the content is discharged, the air in the inner layer 3 can be easily discharged. Therefore, it is possible to prevent the powder or the like of the content from being absorbed by moisture and being oxidized or solidified. Can.

  Further, according to the present embodiment, the air in the inner layer body 3 can not be discharged to the outside by pressing the plug body 32 and engaging with the spout tube 14c. This can prevent the inflow of air from the outside. Therefore, the powder or the like of the contents does not absorb moisture, oxidize or solidify. In addition, by pressing the plug 32, the air discharging function can be stopped to make the sealed state suitable for storage.

  Further, according to the present embodiment, the volume of the inner layer 3 can be kept small in accordance with the remaining amount of the contents by discharging the air inside the inner layer 3. By this, for example, when the content is a tablet, the tablet does not move significantly inside the inner layer body 3, and therefore it is possible to prevent chipping, cracking and the like of the tablet.

  Further, according to the present embodiment, the one-way valve 50 and the plug 32 are arranged in a concentric arrangement, and the valve body 51 of the one-way valve 50 abuts on the upper surface of the plug 32 It was configured to be By this, the said number of parts can be reduced and the said advantage can be enjoyed, implement | achieving the one way valve 50 by simple structure.

  Further, according to the present embodiment, since the one-way valve 50 is covered by the upper lid 40 from above, the one-way valve 50 can be protected from scratches, dirt and the like and can be operated reliably.

  In the present embodiment, although the plug peripheral wall 32c of the plug 32 is configured to be engageable with the dispensing cylinder 14c, the present invention is not limited to this aspect. The stopper 32 may be configured to be engageable with another engaging portion provided on the cap body 10.

  In addition, the above-mentioned place only shows the embodiment of the present invention, and various modifications can be added within the scope of the claims. And, it should be understood that such an arrangement is within the scope of the present invention.

1 double container cap 2 double container body 2a mouth 2b mouth upper end 3 inner layer 4 outer layer 4a mouth peripheral wall 4b container rib 4g neck ring 10 cap body 11 outer peripheral wall 12a cap rib 12b inner wall projection 14a pouring out Hole 14c Injection cylinder (engagement part)
14d engaging projection 15 cap male screw 16a fitting wall 16b lid stopper 18 inner circumferential wall 19 top wall 20 lid 30 lid body 31 upper wall 31d engaging projection 31e upper wall projection 31f upper wall groove 31g groove projection Part 31h Upper lid step 31j Central upper wall 32 Plug 32a Top wall 32b Plug stepped part 32c Plug peripheral wall 32d Engaging projection 32e Plug base 32f Plug contact surface 32g Plug stopper 32h Plug projection 32j Plug Rib 32k Concave groove 33 Lid peripheral wall 34 Lid female screw 35 Inner wall 35a Stopper rib 38 Hinge 40 Upper lid 40a Upper lid step 40b Upper lid projection 40c Central wall 40d Upper lid opening 50 One-way valve 51 Valve body 52 Valve wall 53 Valve wall protrusion Section R channel S accommodation space

Claims (6)

A double container cap attachable to a double container body having an inner layer body and an outer layer body on which the inner layer body is disposed,
A cap body having a pouring hole for pouring out the contents from the inner layer body which can be reduced in volume, and mounted on the mouth of the double container body;
An openable and closable lid covering the pouring hole;
The lid includes a lid body attached to the cap body, a plug body supported so as to be vertically displaceable with respect to the lid body, and one direction capable of discharging the air in the inner layer to the outside. With a valve,
When the lid is closed from the opened state, the plug abuts on the engaging portion provided on the cap body, and the concave groove provided on at least one of the plug and the engaging portion, and the groove A double container cap characterized in that it is positioned at a discharge position where air in the inner layer can be discharged to the outside via a one-way valve.   The duplex according to claim 1, wherein the plug is positioned to a storage position where air in the inner layer can not be discharged to the outside by engaging the plug with the engagement portion from the discharge position. Container cap.   The double container cap according to claim 1, wherein the engagement portion is a pouring cylinder that covers the periphery of the pouring hole.   The dual container cap according to any one of claims 1 to 3, wherein the one-way valve is closed when the valve body abuts on the plug body.   The double container cap according to any one of claims 1 to 4, wherein the one-way valve is provided concentrically with the plug body.   The cap for a double container according to any one of claims 1 to 5, wherein the lid further includes an upper lid covering the one-way valve from above.

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