JP2018135136A - Double structured container and inner cap module for double structured container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily handle the change of cap exterior according to usage, for instance, to easily handle small lot production with many types.SOLUTION: It includes a container body 4 which has an inner container 2 which changes its shape when contents are being reduced and an outer container 3 with the inner container contained inside, an inner cap 5 provided at an opening part 4a of the container body, a discharging valve 9 for communicating or blocking inside of the inner container to or from a content passage hole 5a provided on the inner cap, and an outer cap 7 which covers the inner cap. On the outer container, a suction hole 6 is formed to suck the air inside the gap with the inner container and the discharging valve is provided being locked on the inside of the inner cap.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a double container and an inner cap module for the double container.

  Conventionally, for example, as shown in Patent Document 1 below, a container body including an inner container that is reduced in volume as the contents are reduced, and an outer container in which the inner container is installed, and attached to the mouth of the container body There is known a double container comprising a cap formed and a discharge valve that switches between the passage of the contents formed in the cap and the inside of the inner container, and the shutoff thereof.

JP 2013-151316 A

  However, in the conventional double container, for example, when changing the external appearance of the cap in accordance with the new use of the contents stored in the inner container, the device for assembling the discharge valve to the cap, and the operation of the discharge valve Therefore, there is a problem that it is difficult to cope with a variety of small lot production. In addition, when the contents are cosmetics, there is a demand for changing the appearance of the cap in order to enhance the decorativeness.

  Therefore, an object of the present invention is to provide a double container and an inner cap module for the double container that can easily cope with the production of various kinds of small lots.

  The present invention employs the following means in order to solve the above problems. That is, the double container according to the present invention includes an inner container that is reduced in volume as the contents are reduced, an outer container in which the inner container is installed, and an inner body that is attached to the mouth of the container body. A cap, a discharge valve that switches between the passage of the contents formed in the inner cap and the inside of the inner container, and a switch between the two, and an outer cap that covers the inner cap, and the outer container includes An intake hole for sucking air is formed between the inner container, and the discharge valve is disposed in a state of being locked inside the inner cap.

  Further, the inner cap module for a double container according to the present invention is provided with an outer cap at the mouth of a container body including an inner container whose volume is reduced and deformed as the contents are reduced, and an outer container in which the inner container is built. An inner cap that is mounted in a covered state, and a discharge valve that switches between the passage of the contents formed in the inner cap and the inside of the inner container, and the blocking of the discharge valve. It is arranged in a state of being locked inside the inner cap.

In the present invention, since the inner cap is covered by the outer cap, the appearance can be changed by changing the shape and size of the outer cap without changing the shape and size of the inner cap and the discharge valve. it can. Therefore, it is not necessary to change the device that assembles the discharge valve to the inner cap and the device that inspects the operation of the discharge valve even if the appearance is changed. It can be performed on the line and can easily cope with the production of various kinds of small lots.
Moreover, since the discharge valve is disposed in a state of being locked inside the inner cap, the discharge valve and the inner cap can be handled as one module, and the same specification that has been assembled and inspected can be used. A plurality of inner cap modules are prepared in advance, and this inner cap module can be assembled to one selected from a plurality of types of outer caps, and can be provided with excellent handleability.

  Here, a discharge hole through which contents from the passage hole pass may be formed in the outer cap.

  In this case, since the discharge hole through which the content from the passage hole passes is formed in the outer cap, the size of the discharge hole, for example, in accordance with the new use and properties of the content to be stored in the inner container, Even if it is necessary to change the opening direction of the discharge holes and the like, it is not necessary to change the specifications of the inner cap module, so that the handleability can be further improved.

  The intake hole is formed in the mouth portion of the outer container, and the inner cap is formed with an outside air introduction hole that communicates the outside with the intake hole, and the communication between the intake hole and the outside air introduction hole is established. And an air valve for switching between the air valve and the air valve, and the air valve may be locked to the inner cap.

  In this case, since the air valve that switches communication between the intake hole and the outside air introduction hole and switching between the intake hole and the outside air introduction hole is provided, the volume of the inner container can be accurately deformed by following the decrease in the contents. In addition, since the air valve is locked to the inner cap, the air valve, the discharge valve, and the inner cap can be handled as one module, and the handleability can be improved more reliably.

  According to the present invention, it is possible to easily cope with a change in the appearance of the cap according to the application, and it is possible to easily cope with, for example, multi-product small-lot production.

It is a longitudinal section showing a 1st embodiment of a double container concerning the present invention. It is a top view of the inner cap of the double container of FIG. It is a longitudinal cross-sectional view which shows the modification of the double container shown in FIG. It is a longitudinal cross-sectional view which shows 2nd Embodiment of the double container which concerns on this invention.

Hereinafter, a first embodiment according to the present invention will be described with reference to the drawings. In each drawing used in the following description, the scale is appropriately changed to make each member a recognizable size.
As shown in FIG. 1, the double container 1 of the present embodiment includes a flexible inner container 2 that accommodates the contents and undergoes volumetric deformation (squeezing deformation) as the contents decrease, and the inner container. 2, a container main body 4 having an outer container 3, an inner cap 5 attached to a mouth 4 a of the container main body 4, a content passage hole 5 a formed in the inner cap 5, and the inner container 2. A discharge valve 9 for switching between communication with and disconnection of the valve and an outer cap 7 that covers the inner cap 5.

  In addition, the inner container 2, the outer container 3, the inner cap 5, and the outer cap 7 are disposed in a state in which the respective central axes are located on a common axis. In the present embodiment, this common axis is referred to as a container axis O, the mouth 4a side of the container body 4 along the container axis O is referred to as the upper side, and the bottom side (not shown) of the container body 4 is referred to as the lower side. Further, in a plan view viewed from the container axis O direction, a direction orthogonal to the container axis O is referred to as a radial direction, and a direction around the container axis O is referred to as a circumferential direction.

The container body 4 is formed by blow molding, and is formed as a delamination type container (delami bottle) in which the outer surface of the inner container 2 is laminated on the inner surface of the outer container 3 so as to be peelable.
As blow molding, for example, a laminated parison combined double (inside and outside) by extrusion molding or the like may be formed, and the container body 4 may be formed by blow molding this laminated parison (extrusion blow molding). Further, the preform for the outer container and the preform for the inner container are separately formed by injection molding or the like, and these are combined in a double (inner and outer) and integrally formed into a biaxially stretched blow molding, thereby forming the container body 4. May be formed.
The outer container preform is biaxially stretched blow-molded first to form the outer container 3, and then the inner container preform is placed inside the outer container 3, and then the inner container preform is placed in the second container. The container body 4 may be formed by axial stretch blow molding.

  The inner container 2 and the outer container 3 are made of synthetic resin, and may be made of the same material or different materials as long as they are detachable combinations. Examples of synthetic resin materials include PET (polyethylene terephthalate), PP (polypropylene), PE (polyethylene), nylon (polyamide), EVOH (ethylene-vinyl alcohol copolymer), and the like. Out of these synthetic resin materials, the outer container 3 and the inner container 2 are formed in a combination that can be peeled (not compatible).

The container body 4 is formed in a bottomed cylindrical shape in which a mouth portion 4a, a shoulder portion 4b, a body portion 4c, and a bottom portion (not shown) are continuously provided in this order from the upper side to the lower side. The shoulder 4b gradually increases in diameter from the upper side toward the lower side. The trunk | drum 4c is formed in the cross-sectional view circular shape, for example.
The outer container 3 constituting the container body 4 can be squeezed and deformed, and the inner container 2 is deformed and deformed as the outer container 3 is squeezed. Therefore, at least a portion of the outer container 3 positioned in the body 4c can be elastically deformed toward the radially inner side (inner side of the container).

The mouth 4a of the container body 4 extends upward from the upper end opening of the shoulder 4b. The mouth 4a of the container body 4 is configured such that the mouth 2a of the inner container 2 and the mouth 3a of the outer container 3 are laminated.
An annular folded portion protruding outward in the radial direction is formed at the upper end portion of the mouth portion 2 a of the inner container 2, and this folded portion is disposed at the upper end opening edge of the mouth portion 3 a of the outer container 3. Therefore, the mouth 3 a of the outer container 3 is closed by the inner container 2. In the mouth portion 3 a of the outer container 3, an intake hole 6 is formed between the outer container 3 and the inner container 2 for sucking air through an outside air introduction hole 23 described later. Note that the intake holes 6 may be formed in the outer container 3 in the body or bottom other than the mouth 3a. For example, when the intake hole 6 is formed in the body portion of the outer container 3, an air valve 11 to be described later is disposed in the body portion of the outer container 3, and the air valve 11 allows the space between the inner container 2 and the outer container 3. While allowing air to be sucked, the air may be restricted from flowing out between the inner container 2 and the outer container 3.

Here, in the illustrated example, the inner plug 8 is arranged at the upper end opening edge of the mouth portion 4 a of the container body 4.
The inner plug 8 extends in the vertical direction from an annular outer base portion 8a disposed at the upper end opening edge of the mouth portion 4a of the container body 4, an inner base portion 8b positioned radially inward of the outer base portion 8a. A connecting cylinder portion 8c that connects the radially inner end portion of the outer base portion 8a and the radially outer end portion of the inner base portion 8b, and extends upward from the outer peripheral edge portion of the outer base portion 8a, A fitting cylinder portion 8d fitted inside the cap 5. The outer base portion 8a, the inner base portion 8b, the connecting tube portion 8c, and the fitting tube portion 8d are disposed coaxially with the container shaft O. The inner base portion 8b is located above the outer base portion 8a.

The outer base portion 8a protrudes upward, protrudes downward from the rising cylindrical portion 14 surrounding the connecting cylindrical portion 8c from the outside in the radial direction, and fits inside the mouth portion 4a of the container body 4, A fitting cylinder 15 that seals the mouth 4a of the container body 4 is formed.
A flow hole 16 penetrating in the vertical direction is formed in the inner base portion 8b, and the flow hole 16 is arranged coaxially with the container axis O.
A plurality of through-holes penetrating in the radial direction and opening downward are formed in the fitting cylinder portion 8d at intervals in the circumferential direction. The through hole opens in a gap between the outer peripheral surface of the mouth portion 4a of the container body 4 and the inner peripheral surface of the peripheral wall portion 21 of the inner cap 5 described later.

  The inner cap 5 is connected to the peripheral wall portion 21 screwed into the mouth portion 4 a of the container body 4, and the top wall portion 22 that is connected to the upper end portion of the peripheral wall portion 21 and covers the upper end opening portion of the mouth portion 4 a of the container body 4. And it is formed in the top cylinder shape provided with. Note that the inner cap 5 may be, for example, undercut fitted into the mouth portion 4 a of the container body 4.

  The passage hole 5 a is formed in the top wall portion 22, and the passage hole 5 a is arranged coaxially with the container axis O. As shown in FIG. 2, a plurality of first projecting ribs 22 a extending in the radial direction are formed on the upper surface of the top wall portion 22 on the outer side in the radial direction from the passage hole 5 a at intervals in the circumferential direction. Has been. In the top wall portion 22, an outside air introduction hole 23 that communicates the outside with the intake hole 6 of the container body 4 is formed in a portion located on the outer side in the radial direction from the passage hole 5 a. Two outside air introduction holes 23 are formed in the top wall portion 22 and are arranged one by one at each position sandwiching the container axis O in the radial direction. The outside air introduction hole 23 is formed in an arc shape in plan view extending along the circumferential direction. On the upper surface of the top wall portion 22, a second projecting rib 22 b extending in the radial direction is formed in a portion surrounded by the outside air introduction hole 23 and two first projecting ribs 22 a adjacent to each other in the circumferential direction. The second protruding rib 22b is shorter in the radial direction than the first protruding rib 22a.

As shown in FIG. 1, a hanging cylinder portion 24 that protrudes downward is formed in a portion of the top wall portion 22 that is located radially inward of the outside air introduction hole 23. An air valve seat portion 22 c that protrudes downward is formed in a portion of the top wall portion 22 that is located radially outside the outside air introduction hole 23. The air valve seat portion 22 c is formed in an annular shape and is arranged coaxially with the container axis O.
In the lower end portion of the peripheral wall portion 21, a portion of the mouth portion 4a of the container body 4 that is located below the intake hole 6 is closely fitted. As a result, communication between the intake hole 6 and the outside through the lower end opening of the peripheral wall portion 21 is blocked. Of the inner peripheral surface of the peripheral wall portion 21, a portion located above the female screw portion screwed into the mouth portion 4 a of the container body 4 is a smooth surface, and the fitting tube portion 8 d of the inner plug 8 is fitted into this portion. Are combined. Note that the inner plug 8 and the inner cap 5 may be integrally formed.

  Between the inner plug 8 configured as described above and the top wall portion 22 of the inner cap 5, the discharge valve 9, and the air valve 11 that switches communication between the intake hole 6 and the outside air introduction hole 23, and the blocking thereof. Is arranged.

Here, between the inner plug 8 and the top wall portion 22 of the inner cap 5, the lower end portion is fitted inside the rising cylinder portion 14 formed in the inner plug 8, and the upper end portion is connected to the ceiling wall portion 22. A cylindrical body 51 fitted inside the formed hanging cylindrical part 24 is disposed.
The discharge valve 9 is disposed on the inner side of the cylindrical part 51 and is detachably mounted on the upper surface of the inner base part 8b. The discharge valve 9 is formed, for example, in a circular shape in a plan view, and closes the flow hole 16 formed in the inner base portion 8b so as to be freely opened. The discharge valve 9 is arranged coaxially with the container axis O. The discharge valve 9 is connected to the inner peripheral surface of the cylindrical portion 51 via a plurality (three) of elastic arms 42.

The elastic arm 42 is formed, for example, so as to extend in the circumferential direction, thereby ensuring an appropriate spring property, and an inner end portion in the radial direction is connected to an outer peripheral edge portion of the discharge valve 9. The outer end portion is connected to the cylindrical portion 51. The elastic arm 42 is elastically deformed so as to move the discharge valve 9 upward when the contents in the inner container 2 pass through the flow hole 16, so that the discharge valve 9 is moved to the upper surface of the inner base portion 8 b. Keep away from.
The number of elastic arms 42 is not limited to three. Moreover, as the discharge valve 9, what is necessary is just to be able to open | release the flow hole 16 when the contents in the inner container 2 pass the flow hole 16, and it is good also as valve structures other than the said structure.

The air valve 11 protrudes radially outward from the outer peripheral surface of the cylindrical portion 51, and is formed in an elastically deformable annular shape having a radially outer end portion 11a as a free end. The radially outer end portion 11a of the air valve 11 is in contact with the lower surface of the air valve seat portion 22c of the top wall portion 22 so as to be separated from below from the lower side. Accordingly, the air valve 11 closes the outside air introduction hole 23 from the inside of the inner cap 5 so as to be freely opened. That is, the air valve 11 allows the inflow of air from the outside into the inner cap 5 through the outside air introduction hole 23 and restricts the outflow of air from the inside of the inner cap 5 through the outside air introduction hole 23 to the outside. Acts as a valve. Air that has flowed into the inner cap 5 from the outside through the outside air introduction hole 23 flows between the inner container 2 and the outer container 3 through the intake hole 6 formed in the outer container 3.
In addition, although the discharge valve 9 and the air valve 11 were integrally formed, you may make these into another member.

As described above, the fitting tube portion 8d of the inner plug 8 is fitted inside the peripheral wall portion 21 of the inner cap 5, so that the inner plug 8 is locked inside the inner cap 5. It is arranged. Further, the upper end portion of the cylindrical portion 51 is fitted inside the hanging cylindrical portion 24 formed on the top wall portion 22, whereby the discharge valve 9 and the air valve 11 are locked inside the inner cap 5. It is arranged in the state.
As described above, the inner cap 5, the inner plug 8, the discharge valve 9, and the air valve 11 constitute an inner cap module 20 that is assembled integrally.

The outer cap 7 includes a top cylindrical cap body 27 that is externally mounted on the inner cap 5, and a top cylindrical lid body 29 that is connected to the cap main body 27 via a hinge portion 28.
The peripheral wall 34 of the cap body 27 is undercut fitted to the peripheral wall 21 of the inner cap 5. The outer diameter of the peripheral wall portion 34 of the cap body 27 is the same throughout the entire vertical direction. Between the inner surface of the cap main body 27 and the outer surface of the inner cap 5, a detent portion 12 that restricts the relative circumferential movement of the outer cap 7 and the inner cap 5 is disposed. The anti-rotation portion 12 includes a vertical rib formed on one of the inner surface of the cap main body 27 and the outer surface of the inner cap 5, and a vertical groove formed on the other and fitted with the vertical rib. Has been. Three anti-rotation portions 12 are arranged at intervals in the circumferential direction. Thereby, the relative circumferential positions of the outer cap 7 and the inner cap 5 can be easily adjusted. The peripheral wall 34 of the cap body 27 may be attached to the container body 4.

The lower surface of the top wall portion 31 of the cap body 27 is in close contact with the opening peripheral edge of the passage hole 5 a on the upper surface of the top wall portion 22 of the inner cap 5. Further, the lower surface of the top wall portion 31 of the cap body 27 is also in contact with the first projecting rib 22 a and the second projecting rib 22 b on the upper surface of the top wall portion 22 of the inner cap 5. As a result, communication between the outside passing between the lower surface of the top wall portion 31 and the upper surface of the top wall portion 22 and the outside air introduction hole 23 is ensured. The intake hole 6 and the outside of the container body 4 are the gap between the outer peripheral surface of the mouth 4a of the container main body 4 and the inner peripheral surface of the peripheral wall portion 21 of the inner cap 5, and the through hole of the fitting cylinder portion 8d. The outside air introduction hole 23 and the clearance between the outer surface of the inner cap 5 and the inner surface of the cap body 27 communicate with each other.
Here, an engagement protrusion is formed at the lower end portion of the outer peripheral surface of the peripheral wall portion 21 of the inner cap 5, and the peripheral wall portion 34 of the cap body 27 is undercut fitted. A plurality of communication grooves 21a extending in the vertical direction are formed at intervals in the circumferential direction. Air flows into the gap between the outer surface of the inner cap 5 and the inner surface of the cap body 27 through the communication groove 21 a and the lower end opening of the peripheral wall 34 of the cap body 27.

A discharge hole 31 a through which the content from the passage hole 5 a of the inner cap 5 passes is formed in the top wall portion 31 of the cap body 27. The discharge holes 31a are arranged so as to be shifted in the radial direction with respect to the container axis O. A discharge cylinder 32 protruding upward is formed at the opening peripheral edge of the discharge hole 31 a on the top surface of the top wall portion 31. The inner diameter and the outer diameter of the discharge cylinder 32 are gradually increased toward the upper side. On the lower surface of the top wall portion 31, a seal cylinder 31b fitted into the passage hole 5a of the inner cap 5 is formed.
The lid top wall portion 33 of the lid body 29 is formed with a plug portion 33a that protrudes downward and is detachably fitted into the discharge hole 31a. The lid top wall 33 is formed with a surrounding cylinder 33b that protrudes downward and surrounds the discharge cylinder 32 from the outside in the radial direction.

In the double container 1 configured as described above, when discharging the contents, the lid 29 of the outer cap 7 is first rotated upward around the hinge portion 28 to open the discharge hole 31a. Thereafter, for example, the outer container 3 is squeezed (elastically deformed) radially inward while the container body 4 is tilted or turned upside down. As a result, the inner container 2 is deformed radially inward along with the outer container 3 to reduce the volume, so that the internal pressure of the inner container 2 increases.
Then, since the discharge valve 9 is separated upward from the upper surface of the inner base portion 8b, the flow hole 16 is opened, and the discharge hole 31a communicates with the inside of the inner container 2 through the passage hole 5a and the flow hole 16. . Thereby, the content accommodated in the inner container 2 is discharged outside through the discharge hole 31a.

  Thereafter, by stopping or releasing the squeeze deformation of the outer container 3, when the increase in the internal pressure of the inner container 2 is stopped or the internal pressure of the inner container 2 is decreased, the discharge valve 9 is restored to its original state by the deformation of the elastic arm 42. Return and sit on the upper surface of the inner base portion 8b. Thereby, the circulation hole 16 is closed again, and the communication between the discharge hole 31a and the inside of the inner container 2 is blocked. For this reason, the discharge of the contents stops.

Further, by releasing the squeeze deformation of the outer container 3, the outer container 3 starts to be restored and deformed, so that a negative pressure is generated between the outer container 3 and the inner container 2. Then, since this negative pressure acts on the air valve 11 through the intake hole 6, the radially outer end portion 11a of the air valve 11 is spaced downward from the lower surface of the air valve seat portion 22c, and the outside air introduction hole 23 is opened. . Accordingly, air flows from the outside into the inner cap 5 through the outside air introduction hole 23, and this air flows between the inner container 2 and the outer container 3 through the intake hole 6.
As a result, even if the outer container 3 is restored and deformed, the outer surface of the inner container 2 is separated from the inner surface of the outer container 3, and the inner container 2 is kept in a reduced volume deformed state.

  As described above, according to the double container 1 according to the present embodiment, since the inner cap 5 is covered with the outer cap 7, the shape and size of the inner cap 5 and the discharge valve 9 are not changed. By changing the shape and size of the outer cap 7, the appearance can be changed. Therefore, even if the appearance is changed, there is no need to change the device for assembling the discharge valve 9 to the inner cap 5, the device for inspecting the operation of the discharge valve 9, and the like. It is possible to carry out on the same production line, the appearance of the cap can be easily changed, and it is possible to easily cope with the production of various kinds of small lots.

  In addition, since the discharge valve 9 is disposed in a state of being locked inside the inner cap 5, the discharge valve 9 and the inner cap 5 can be handled as one module, assembled and inspected. It is possible to prepare a plurality of inner cap modules 20 having the same specifications in advance, and to assemble the inner cap module 20 into one selected from a plurality of types of outer caps 7, thus providing excellent handling properties. Can be made.

Moreover, since the discharge hole 31a through which the content from the passage hole 5a passes is formed in the outer cap 7, according to the new use of the content accommodated in the inner container 2, a property, etc., for example, the discharge hole 31a Even if it is necessary to change the size, the opening direction of the discharge hole 31a, and the like, the specification of the inner cap module 20 does not need to be changed, so that the handleability can be further improved.
In addition, since the air valve 11 is provided to switch between the communication between the intake hole 6 and the outside air introduction hole 23 and the shut-off thereof, the inner container 2 can be accurately volume-reduced and deformed following the decrease in contents. Moreover, since the air valve 11 is locked to the inner cap 5, the air valve 11, the discharge valve 9 and the inner cap 5 can be handled as one module, and the handling property is more reliably improved. be able to.

  In addition to the outer cap 7 shown in FIG. 1, for example, as shown in FIG. 3, an outer cylinder 71 having an upper end connected to the upper end of the peripheral wall 34 is provided, and a discharge hole 72 is shown in FIG. 1. You may employ | adopt the outer cap 70 larger than the discharge hole 31a shown. The outer peripheral surface of the upper part of the outer cylinder 71 gradually increases in diameter as it goes downward, and is formed in a curved shape that is recessed toward the inner side in the radial direction, and the outer peripheral surface of the lower part of the outer cylinder 71 extends straight in the vertical direction. ing. In the illustrated example, the discharge hole 72 is arranged coaxially with the container axis O.

  Next, a second embodiment of the double container according to the present invention will be described. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 4, the inner stopper 80 of the double container 10 of the present embodiment includes a storage cylinder portion 81 that extends in the vertical direction, and a valve body portion 82 that is stored in the storage cylinder portion 81. . The accommodating cylinder portion 81 extends downward from the inner base portion 8b and penetrates the inner base portion 8b in the vertical direction. In the illustrated example, the inner base portion 8b and the housing cylinder portion 81 are integrally formed, but may be formed separately.

  Here, the flow hole 83 formed in the inner base portion 8b is disposed at a position spaced from the container axis O in the radial direction. The accommodating cylinder portion 81 is disposed in a portion adjacent to the flow hole 83 in the inner base portion 8b. In the example shown in the drawing, the housing cylinder part 81 is disposed at a position shifted in the radial direction with respect to the container axis O, and a part thereof is integrated with the connecting cylinder part 8c. The discharge valve 9 closes a part of the upper end opening of the housing cylinder 81, and the interior of the housing cylinder 81 is always open upward. The inside of the storage cylinder part 81 is a storage space for storing the residual contents existing above the inner plug 80 and opens up and down. A valve seat portion 81a that is gradually reduced in diameter as it goes downward is formed in the lower portion of the housing cylinder portion 81.

The valve body portion 82 is accommodated in the accommodating cylinder portion 81 so as to be movable in the vertical direction, and is seated on the inner peripheral surface of the valve seat portion 81a so as to be separated upward. In the illustrated example, the valve body 82 is a so-called ball valve formed in a spherical shape.
The valve body 82 moves to the discharge valve 9 side when, for example, the container body 4 is tilted or turned upside down when discharging the contents, and when the container body 4 is returned to the original upright posture, Or it moves to the valve seat part 81a side by the negative pressure generated by the restoring force of the inner container 2. As a result, the residual content present on the upper side of the inner plug 80 can be drawn into the accommodating cylinder portion 81, and dripping can be avoided by a so-called suck back effect.

  When the valve body portion 82 is made of synthetic resin, all the members constituting the double container 10 can be made of synthetic resin, so that the cost can be reduced and each member can be made of different types. The double container 10 can be discarded without performing an operation of separating each material. Further, when the valve body portion 82 is made of synthetic resin, the specific gravity with respect to the mass and contents can be reduced as compared with the case where it is made of metal, so that the double container 10 passes through the inner cap 52, for example. When the squeeze deformation toward the radially inner side with respect to the outer container 3 is released in a state where the hole 53b is in the downward discharge direction, the valve body portion 82 is quickly seated on the inner peripheral surface of the valve seat portion 81a. It becomes easy to let. Therefore, it is possible to suppress the air from entering the inner container 2 through the accommodation cylinder portion 81.

The top wall 53 of the inner cap 52 is formed with a protruding portion 53a that protrudes upward. The overhanging portion 53a is formed in a top tube shape and is arranged coaxially with the container axis O. A passage hole 53b that opens upward is formed in the overhang portion 53a. The passage hole 53b is arranged so as to be shifted in the radial direction with respect to the container axis O. A discharge cylinder 53c that protrudes upward is formed at the opening peripheral edge of the passage hole 53b on the upper surface of the overhang 53a. The inner diameter and the outer diameter of the discharge cylinder 53c are gradually increased toward the upper side. The outside air introduction hole 23 is formed in a portion of the top wall portion 53 of the inner cap 52 that is located on the outer side in the radial direction from the overhang portion 53a. Of the lower surface of the ceiling wall portion 53, a portion located on the outer side in the radial direction from the overhang portion 53a is located below the lower surface of the overhang portion 53a in which the passage hole 53b is opened.
On the outer peripheral surface of the peripheral wall portion 54 of the inner cap 52, a plurality of communication grooves 54a extending in the vertical direction and opening in both the upper and lower directions are formed at intervals in the circumferential direction. Air flows into the gap between the outer surface of the inner cap 52 and the inner surface of the cap body 74 through the communication groove 54 a and the lower end opening of the peripheral wall 34 of the cap body 74. In the example shown in the drawing, the communication groove 54 a reaches the upper part of the peripheral wall portion 54 of the inner cap 52 beyond the engagement protrusion.
An insertion hole 72 a into which the protruding portion 53 a of the inner cap 52 is inserted is formed in the top wall portion 75 of the cap body 74 of the outer cap 73. The discharge cylinder 53 c of the inner cap 52 protrudes upward from the top wall portion 75 of the outer cap 73.
A gap is provided between the inner peripheral surface of the insertion hole 72a and the outer peripheral surface of the overhanging portion 53a, and air is caused to flow into the gap between the outer surface of the inner cap 52 and the inner surface of the cap body 74 through this gap. May be.

In the above configuration, when the contents accommodated in the inner container 2 are discharged to the outside from the passage hole 53b, the valve body part 82 in the accommodating cylinder part 81 is caused by the internal pressure of the inner container 2 or the flow pressure of the contents. Although it moves to the discharge valve 9 side, when the container body 4 is returned to the upright posture after the contents are discharged, the valve body part 82 moves to the valve seat part 81a side in the housing cylinder part 81 due to its own weight. Then, it is seated on the valve seat portion 81a. The valve body 82 can be moved to the valve seat 81a side not only by its own weight but also by a negative pressure generated by the restoring force of the inner container 2. Further, since it is possible to move the valve body 82 in the housing cylinder 81 to the discharge valve 9 side by utilizing the increase in the internal pressure of the inner container 2, the container body 4 is not always tilted or discharged when the contents are discharged. There is no need to flip it upside down.
Even if the contents remain between the top wall portion 53 and the inner base portion 8b of the inner cap 52, the sack accompanying the movement of the valve body portion 82 from the discharge valve 9 side toward the valve seat portion 81a side. Due to the back effect, the residual content can be drawn into the housing cylinder 81. Therefore, the residual contents are difficult to leak to the outside through the passage hole 53b, and dripping can be prevented.

Even in the double container 10 configured as described above, the inner cap 52 is covered with the outer cap 73, and the inner cap 52, the inner plug 80, the discharge valve 9, and the air valve 11 are handled as one module. Therefore, the same effect as the first embodiment can be achieved.
Further, since the upper surfaces of the discharge cylinder 53c and the overhanging portion 53a of the inner cap 52 are exposed to the outside from the outer cap 73, the colors of the respective materials forming the inner cap 52 and the outer cap 73 are made different from each other. Further, it can be provided with excellent design properties.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, in each of the above embodiments, as the double containers 1 and 10, the outer surface of the inner container 2 is a laminated peelable container that is peelably laminated on the inner surface of the outer container 3, but the present invention is not limited to this. A double container in which a gap is secured between the inner container 2 and the outer container 3 may be used.
In the above embodiments, the case where the air valve 11 is provided in the inner caps 5 and 52 has been described as an example. However, the air valve 11 may be provided in the outer container 3.
The present invention is also applicable to a double container in which the outside air introduction hole 23 is not formed in the inner caps 5 and 52 and the air valve 11 is not provided.
Moreover, although the structure provided with the top wall parts 31 and 75 and the cover body 29 was shown as the outer caps 7, 70 and 73, you may employ | adopt the outer cap which does not have these.
Further, instead of the above embodiments, in order to allow air to flow into the gap between the outer surface of the inner cap 5, 52 and the inner surface of the cap body 27, 74, a through hole is formed in the cap body 27, 74. Also good.
Moreover, it replaces with said each embodiment and the air valve 11 may latch on the outer side of the inner caps 5 and 52. FIG.

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

DESCRIPTION OF SYMBOLS 1,10 Double container 2 Inner container 3 Outer container 3a Outer container mouth part 4 Container body 4a Container body mouth part 5, 52 Inner cap 5a, 53b Passing hole 6 Intake hole 7, 70, 73 Outer cap 9 Discharge valve 11 Air valve 20 Inner cap module 23 Outside air introduction hole 31a, 72 Discharge hole

Claims (4)

A container main body comprising an inner container that undergoes volume reduction deformation as the contents are reduced, and an outer container in which the inner container is installed;
An inner cap attached to the mouth of the container body;
A communication between the passage hole of the contents formed in the inner cap and the inside of the inner container, and a discharge valve for switching the shutoff;
An outer cap that covers the inner cap,
The outer container is formed with an intake hole for sucking air between the inner container and the outer container,
The double container, wherein the discharge valve is disposed in a state of being locked inside the inner cap.   The double container according to claim 1, wherein a discharge hole through which contents from the passage hole pass is formed in the outer cap. The intake hole is formed in the mouth of the outer container,
The inner cap is formed with an outside air introduction hole that communicates the outside and the intake hole,
An air valve for switching communication between the intake hole and the outside air introduction hole and blocking the air valve;
The double container according to claim 1, wherein the air valve is locked to the inner cap. An inner cap that is mounted in a state of being covered with an outer cap at the mouth of a container body that includes an inner container that is deformed and reduced as the contents are reduced, and an outer container in which the inner container is installed;
A communication between the passage hole of the content formed in the inner cap and the inside of the inner container, and a discharge valve for switching the shutoff,
An inner cap module for a double container, wherein the discharge valve is disposed in a state of being locked inside the inner cap.

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