JP7113766B2 - double container - Google Patents

Description

TECHNICAL FIELD The present invention relates to a double container that can be disposed of with its outer container reduced in volume and deformed.

Conventionally, a container body including an inner container that accommodates contents and is deformed in volume reduction as the contents decrease, and an outer container in which the inner container is accommodated; A double container is known that includes a discharge cap having a discharge hole for the contents formed thereon, and the discharge cap has a discharge valve that switches communication between the discharge hole and the inside of the container main body, and shutoff (see, for example, Patent Documents 1).
In such a double container, when the outer container is pressed radially inward, the discharge valve is opened to allow communication between the discharge hole and the inside of the container body, and the contents are discharged from the discharge hole. When the inner container is reduced in volume and deformed as the contents are discharged, a negative pressure is created between the inner container and the outer container, and outside air is introduced between the inner container and the outer container through the air intake hole. .

In the above double container, when the contents are used up and then discarded, the discharge cap is inserted between the outer container and the inner container through the suction hole so that the outer container is reduced in volume and deformed. It has a lid member that is movable between a closed position that blocks air flow to the outside and an open position that allows it.

JP 2017-030796 A

However, in such a double container, when disposing of the double container, the lid member is once moved to the open position to reduce the volume of the outer container, and then the outside air flows through the air intake hole into the outer container and the inner container. It was necessary to return the lid member to the closed position again in order to prevent it from flowing between the

SUMMARY OF THE INVENTION It is an object of the present invention to provide a double container that can more easily maintain the deformed state of reduced volume of the outer container.

The present invention employs the following means to solve the above problems. That is, the double container of the present invention includes an inner container that accommodates contents and is deformed to reduce the volume as the contents decrease, and an outer container that accommodates the inner container; a discharge cap attached to the mouth of the main body and formed with a discharge hole for the contents, wherein the outer container and the inner container are formed with an intake hole for sucking outside air. A double container, wherein the discharge cap includes a cap body having an outside air introduction hole that allows communication between the outside and the intake hole, and a discharge valve that switches communication between the discharge hole and the inside of the container body. and an air valve disposed inside the cap body for opening and closing the outside air introduction hole, wherein when the air valve comes into contact with the cap body, the cap body receives an external air through the outside air introduction hole. When the air valve comes into contact with a first valve seat portion that allows air to flow to the air intake hole side but prevents air from flowing from the air intake hole side through the outside air introduction hole to the outside. (2) a second valve seat that prevents air from flowing from the outside through the outside air introduction hole to the air intake hole side, while allowing air to flow from the air intake hole side through the outside air introduction hole to the outside; and a portion, wherein the cap body is relatively to the air valve so as to switch the air valve to contact one of the first valve seat portion and the second valve seat portion. It is characterized by being arranged so as to be movable.

In this invention, when the outer container is pressed inward in a radial direction orthogonal to the container axis while the air valve is in contact with the first valve seat portion, the discharge valve is opened to open the discharge hole and the inside of the container body. , and the content is discharged from the discharge hole. When the volume of the inner container is reduced and deformed as the contents are discharged, the pressure between the inner container and the outer container becomes negative, and the outside air flows between the inner container and the outer container through the outside air introduction hole and the air intake hole. introduced into As a result, the outer container is restored and deformed while maintaining the volume-reducing deformation of the inner container.
For example, when disposing of the double container, the cap main body is moved relative to the air valve to bring the air valve into contact with the second valve seat portion, and in this state, the outer container is moved radially inward. , the air existing between the outer container and the inner container is discharged to the outside through the intake hole and the outside air introduction hole. On the other hand, since the flow of air from the outside to between the outer container and the inner container through the outside air introduction hole and the air intake hole is blocked, even after the pressure on the outer container is released, the pressure on the outer container is reduced. Maintains the deformed state.
In this manner, by simply moving the cap main body relative to the air valve and bringing the air valve into contact with the second valve seat portion, the air between the outer container and the inner container is introduced through the intake hole and the outside air. Even after being discharged through the hole, the outer container is maintained in the reduced and deformed state, so that the working efficiency of the reduced and deformed volume can be improved when, for example, the double container is discarded.
Further, the case where outside air is introduced into the space between the outer container and the inner container while the air valve is in contact with the first valve seat, and the case where the air valve is in contact with the second valve seat The outside air introduction hole can be used as a common hole in the case of discharging the air in the space between the outer container and the inner container to the outside.

Further, in the double container of the present invention, the discharge cap is detachably attached to the cap body, and includes a lid member for opening and closing the discharge hole and the outside air introduction hole, and the lid member and the cap body are connected to each other. An air inlet path may be formed between them.
In this case, the lid member is closed before the outer container is sufficiently restored and deformed after the contents are discharged by pressing the outer container while the air valve is in contact with the first valve seat. Even so, outside air is introduced between the outer container and the inner container through an air inlet passage such as a gap between the lid member and the cap body, and the outer container can be sufficiently restored and deformed. On the other hand, when the air valve is in contact with the second valve seat and the air in the space between the outer container and the inner container is discharged to the outside, the cover member is closed. Since the flow of air from the outside to between the outer container and the inner container through the air intake hole is blocked, outside air does not flow between the outer container and the inner container through the air flow passage, and the outer container is reduced. It can maintain its deformed state.

According to the double container according to the present invention, only by once moving the cap main body relative to the air valve and bringing the air valve into contact with the second valve seat portion, the outer container and the inner container are separated from each other. Even after the air is discharged through the intake hole and the outside air introduction hole, the volume-reducing and deformed state of the outer container is maintained, so that the working efficiency of the volume-reducing and deforming can be improved.

1 is an axial cross-sectional view showing a double container according to one embodiment of the present invention; FIG. FIG. 2 is an axial cross-sectional view showing an assembly of the inner plug body and the valve seat body of FIG. 1; FIG. 2 is a partially enlarged view showing the double container of FIG. 1; 2 is a partial side view of the double container of FIG. 1; FIG. FIG. 2 is an axial cross-sectional view showing a method of operation when discarding the double container of FIG. 1; 6 is a partially enlarged view showing the double container of FIG. 5; FIG.

An embodiment of the double container according to the present invention will be described below with reference to the drawings. In addition, in each drawing used for the following description, the reduced scale is appropriately changed in order to make each member a recognizable size.

As shown in FIG. 1, the double container 1 according to the present embodiment includes an inner container 2 and a flexible inner container 2 that accommodates contents (not shown) and deforms to reduce the volume as the contents decrease. a bottomed cylindrical container body 4 having an outer container 3 in which a liquid is housed;
Here, the container main body 4 and the discharge cap 5 are arranged in such a manner that their central axes are positioned on a common axis. Hereinafter, this common axis will be referred to as a container axis O. In FIG. 1, the direction from the bottom of the container body 4 to the discharge cap 5 along the container axis O will be defined as upward, and the opposite direction will be defined as downward. Further, a direction orthogonal to the container axis O in plan view from the container axis O is defined as a radial direction, and a direction rotating around the container axis O is defined as a circumferential direction. Furthermore, let the left side in FIG. 1 be the front among radial directions, and let the opposite direction be the rear.

The container body 4 is formed by, for example, blow molding, and is a delamination type container (delaminated bottle) in which the inner container 2 is detachably laminated on the inner surface of the outer container 3 .
As the blow molding, for example, a double (inside and outside) laminated parison may be formed by extrusion molding or the like, and the container body 4 may be formed by blow molding the laminated parison (extrusion blow molding). In addition, a preform for the outer container and a preform for the inner container are formed by injection molding or the like, and after these are combined in two (inside and outside), the container main body 4 is formed by biaxial stretch blow molding. I don't mind.
After forming the outer container 3 by first biaxially stretch blow molding the preform for the outer container, the preform for the inner container is placed inside, and then the preform for the inner container is biaxially stretch blow molded. By doing so, the container body 4 may be formed.

The inner container 2 and the outer container 3 are made of a resin material, and may be made of the same material or different materials as long as they can be peeled off. Examples of resin materials include PET (polyethylene terephthalate), PP (polypropylene), PE (polyethylene), nylon (polyamide), and EVOH (ethylene-vinyl alcohol copolymer). Out of these resin materials, the outer container 3 and the inner container 2 are formed by combining them so that they can be separated (incompatible).

The outer container 3 is squeeze-deformable, and the inner container 2 is reduced in volume and deformed as the outer container 3 is squeeze-deformed.
The mouth portion 3A of the outer container 3 has a cylindrical upper cylindrical portion 11 located on the upper side, and is connected to the lower end of the upper cylindrical portion 11, and has a cylindrical shape with an inner diameter and an outer diameter larger than those of the upper cylindrical portion 11. and a lower tubular portion 12 of . The upper tubular portion 11 and the lower tubular portion 12 are arranged coaxially with the container axis O. As shown in FIG.

A plurality of air intake holes 11A penetrating the upper tubular portion 11 in the radial direction are formed in the upper tubular portion 11 at intervals in the circumferential direction. At least one air intake hole 11A may be formed. A male screw portion 11B is formed on the outer peripheral surface of a portion of the upper cylindrical portion 11 above the intake hole 11A. Furthermore, a plurality of first ventilation grooves 11C extending in the vertical direction are formed at intervals in the circumferential direction in the upper portion of the upper cylindrical portion 11, and the outer container 3 and the inner container 2 are separated from each other. In between, outside air can be introduced through the first ventilation groove portion 11C and the intake hole 11A. The first ventilation groove portion 11C is formed longitudinally across the male screw portion 11B. At least one first ventilation groove portion 11C may be formed. Further, for example, if air can flow through a gap between the male threaded portion 11B and a female threaded portion 38A, which will be described later, it is possible not to form the first ventilation groove portion 11C.
Further, the upper end portion of the upper cylindrical portion 11 is a narrow portion 11D having a reduced outer diameter.
At the upper end of the mouth portion 2A of the inner container 2, an annular folded portion 13 protruding radially outward is formed in plan view. The edge is closed from above. This prevents the inner container 2 from peeling off from the outer container 3 at least at the folded portion 13 . It is sufficient that the inner container 2 is restricted from peeling off from the outer container 3 at a portion above the intake hole 11</b>A including the folded portion 13 .

The discharge cap 5 includes a topped cylindrical cap body 21 attached to the upper end of the outer container 3, a topped cylindrical inner plug 22 attached to the upper end of the container body 4, and an inner plug 22. a cylindrical discharge valve 23 attached to the cap body 21; an air valve 24 integrated with the discharge valve 23; The cap main body 21, the inner stopper 22, the discharge valve 23, the air valve 24 and the lid member 25 are arranged coaxially with the container axis O. As shown in FIG.

The cap body 21 includes a top plate portion (first valve seat portion) 31 that is circular in plan view, and a cylindrical outer cylinder portion 32 that extends downward from the outer peripheral edge of the top plate portion 31 . have. The top plate portion 31 and the outer cylinder portion 32 are arranged coaxially with the container axis O. As shown in FIG.
A discharge hole 31A penetrating through the top plate portion 31 in the vertical direction is formed at a position shifted forward with respect to the inner container axis O of the top plate portion 31 . In addition, a cylindrical discharge tube portion 33 is erected upward at the opening edge of the discharge hole 31A in the top plate portion 31 . The inner and outer diameters of the discharge tube portion 33 gradually increase upward.
A cylindrical restriction tube portion 34 protrudes downward from the opening edge portion of the discharge hole 31</b>A of the top plate portion 31 . When the container body 4 is ejected with the mouth portion 4A facing downward, residual air remaining in the communication space S described later may cause the container body 4 to assume the upright posture. When returned, it is restricted from reaching the discharge hole 31A along the lower surface of the top plate portion 31. - 特許庁

Furthermore, the central portion of the top plate portion 31 is formed with a step so as to be positioned above the outer peripheral portion extending radially outward from the central portion. At the connecting portion between the central portion and the outer peripheral portion of the top plate portion 31, there is formed an outside air introduction hole 31B penetrating the connecting portion in the vertical direction. The outside air introduction hole 31B has, for example, an arc shape along the connecting portion in plan view. A plurality of outside air introduction holes 31B may be formed at intervals in the circumferential direction along the connecting portion. may be
Further, cylindrical first and second hanging cylinder portions 35 and 36 are provided radially inwardly of the outside air introduction hole 31B in the top plate portion 31 with a gap therebetween in the radial direction so as to protrude downward. there is

The outer cylindrical portion 32 is connected to a cylindrical upper portion 37 extending downward from the outer peripheral edge of the top plate portion 31 and the lower end of the upper portion 37, and has an inner diameter larger than that of the upper portion 37. a cylindrical lower portion 38; The upper part 37 and the lower part 38 are arranged coaxially with the container axis O. As shown in FIG.
A cylindrical valve seat body 41 is fitted to the inner peripheral surface of the upper portion 37 . The valve seat body 41 is arranged coaxially with the container axis O. As shown in FIG. The valve seat body 41 includes an annular plate-shaped annular valve seat portion (second valve seat portion) 42 in plan view, and a cylindrical inner cylinder extending upward from the outer peripheral edge of the annular valve seat portion 42 . a portion 43; The annular valve seat portion 42 and the internal cylinder portion 43 are arranged coaxially with the container axis O. As shown in FIG.
The air valve 24 can contact the upper surface of the annular valve seat portion 42 , but the annular valve seat portion 42 is separated from the air valve 24 in the state shown in FIG. 1 .

A female threaded portion 38</b>A is formed on the inner peripheral surface of the upper end portion of the lower portion 38 to be screwed with the male threaded portion 3</b>B of the outer container 3 . A plurality of second ventilation grooves 38B extending in the vertical direction are formed in the female threaded portion 38A at intervals in the circumferential direction.
The lower end of the lower portion 38 is airtightly fitted to the outer peripheral surface of the lower cylindrical portion 12 of the mouth portion 4A. This prevents the air intake hole 11A from communicating with the outside of the double container from below the outer cylindrical portion 32 of the cap body 21 .

The inner stopper 22 includes a topped cylindrical base portion 51 disposed at the upper end opening of the mouth portion 4A of the container body 4 and a cylindrical housing cylinder extending downward from the top surface of the base portion 51. A portion 52 and a spherical valve body portion 53 housed in the housing cylinder portion 52 .
The base portion 51 includes a topped cylindrical center portion 54 positioned above the upper end opening of the mouth portion 4A of the container body 4, and an annular ring in plan view extending radially outward from the lower end of the center portion 54. and an annular outer peripheral portion 55 of . The central portion 54 and the annular outer peripheral portion 55 are arranged coaxially with the axis O of the container.

A through hole 54A is formed in the central portion 54 at a position shifted rearward with respect to the container axis O so as to pass through the central portion 54 in the vertical direction and allow the contents to flow therethrough.
A cylindrical rising tube portion 56 is erected upward on the annular outer peripheral portion 55 , and the rising tube portion 56 surrounds the peripheral wall portion of the central portion 54 from the outside in the radial direction. Further, the annular outer peripheral portion 55 is provided with cylindrical first and second mounting cylinder portions 57 and 58 extending downward from the outer peripheral edge of the annular outer peripheral portion 55 . The first mounting cylinder portion 57 functions as a fitting portion for the upper cylinder portion 11 of the outer container 3, and the outer peripheral surface of the first mounting cylinder portion 57 has a third ventilation groove portion 57A extending in the vertical direction. A plurality of them are formed at intervals in the circumferential direction. The second mounting cylinder portion 58 is disposed radially inward of the first mounting cylinder portion 57 and functions as a sealing portion for the mouth portion 2A of the inner container 2 . The first and second mounting tubular portions 57 and 58 sandwich the narrow portion 11D of the upper tubular portion 11 of the outer container 3 in the radial direction.

The housing cylinder portion 52 is provided at a position shifted forward with respect to the container axis O in the central portion 54 of the base portion 51 . A lower end portion of the housing cylinder portion 52 is a diameter-reduced portion 52A whose inner diameter and outer diameter gradually decrease downward. In addition, on the inner surface of the upper portion of the cylindrical housing portion 52, a restricting protrusion 52B that restricts the valve body portion 53 from coming off upward is provided so as to protrude radially inward. Note that the restricting protrusion 52B does not need to be formed over the entire circumference, and the restricting protrusion 52B may not be provided.

The valve body portion 53 has a spherical shape with an outer diameter equal to the inner diameter of the housing cylinder portion 52 , and is housed inside the housing cylinder portion 52 so as to be vertically movable. The valve body portion 53 is seated on the inner peripheral surface of the diameter-reduced portion 52A so as to be able to move upward. The valve body portion 53 is made of synthetic resin or metal. When the valve body portion 53 is made of metal, smooth movement due to its own weight is possible. On the other hand, when the valve body portion 53 is made of synthetic resin, all the members constituting the double container 1 can be made of synthetic resin. easier. In addition, the valve body portion 53 made of synthetic resin can reduce the mass and the specific gravity of the contents compared to the case where the valve body portion 53 is made of metal. In this state, when the squeeze deformation is released by directing the container body 4 radially inward with respect to the outer container 3, the valve body portion 53 is quickly moved away from the restricting protrusion 52B to move inside the diameter-reduced portion 52A. It becomes easier to seat on the peripheral surface. Therefore, by using the valve body portion 53 , it is possible to prevent outside air from entering the inner container 2 through the housing cylinder portion 52 .

As shown in FIG. 2, the inner plug 22 is separated from the valve seat body 41 when it is attached to the container body 4 after being manufactured integrally with the valve seat body 41 . That is, the upper end portion of the rising tubular portion 56 of the inner plug body 22 is connected to the opening edge portion of the annular valve seat portion 42 via the weakened portion 56A. The weakened portions 56A are bridges arranged at intervals in the circumferential direction. The weakened portion 56A of the combined body of the inner plug 22 and the valve seat 41 is broken when the inner plug 22 is pushed into the mouth portion 4A of the container body 4 from above to attach the inner plug. The body 22 and the valve seat body 41 are separated.

As shown in FIG. 1, the discharge valve 23 is a valve that switches communication and disconnection between the discharge hole 31A and the inside of the container body 4. and a valve body 62 which is separably placed and has a circular plate shape in a plan view. The dividing cylinder part 61 and the valve main body 62 are arranged coaxially with the container axis O. As shown in FIG.
The partitioning tubular portion 61 has a communication space S located radially inward of the partitioning tubular portion 61 in the space between the inner plug body 22 and the cap body 21 and communicating with the discharge hole 31A. and an outer passage located radially outward and communicating with the outside air introduction hole 31B. The lower end portion of the dividing cylinder portion 61 is disposed between the peripheral wall portion of the central portion 54 and the rising cylinder portion 56 , and the upper end portion of the dividing cylinder portion 61 is located between the first and second portions of the top plate portion 31 . It is arranged between the hanging tube portions 35 and 36 .

The valve main body 62 is connected to the inner peripheral surface of the partitioned tubular portion 61 via a plurality of (three in this embodiment) elastic arms 63 formed at intervals in the circumferential direction, and is connected to the inner peripheral surface of the base portion 51 . The flow hole 54A formed in 54 is closed so as to be openable and closable. Note that the number of elastic arms is not limited to three. Moreover, the discharge valve 23 only needs to be able to open the communication hole 54A during squeeze deformation of the outer container 3, and may have a structure other than the three-point valve.

As shown in FIGS. 1 and 3, the air valve 24 has an annular plate shape and is integrally formed with the discharge valve 23 . The air valve 24 extends radially outward from an intermediate portion in the vertical direction of the partitioning cylinder portion 61, and the intermediate portion in the radial direction is curved so as to protrude downward. At least the tip of the air valve 24 is in contact with the lower surface of the top plate portion 31 from below on the outside in the radial direction of the outside air introduction hole 31B formed in the top plate portion 31 . First and second protrusions 24A and 24B are formed at the tip of the air valve 24 and protrude downward. The second projecting portion 24B is formed radially inwardly of the first projecting portion 24A and is capable of contacting the upper surface of the annular valve seat portion 42 of the valve seat body 41 . In addition, the air valve 24 may be formed separately from the discharge valve 23 .

As shown in FIG. 1 , the lid member 25 includes a top wall portion 71 that is circular in plan view and a cylindrical tubular wall portion 72 that extends downward from the outer peripheral surface of the top wall portion 71 . and covers the discharge hole 31A and the outside air introduction hole 31B. The ceiling wall portion 71 and the cylindrical wall portion 72 are arranged coaxially with the container axis O. As shown in FIG.
A cylindrical seal tube portion 73 projecting downward is provided at a position shifted forward from the inner container axis O of the top wall portion 71 . The seal cylinder portion 73 is inserted inside the discharge cylinder portion 33 from above.
A lower end of the rear portion of the tubular wall portion 72 is connected to an upper end of the rear portion of the cap body 21 via a hinge 74 . An operation projecting piece 75 projects radially outward from the upper end portion of the front portion of the cylinder wall portion 72 .

A shoulder portion of the outer container 3 exposed from the cap main body 21 and a lower end portion of the lower portion 38 of the cap main body 21 are radially covered with a shrink film (not shown). Further, as shown in FIG. 4A, the air valve 24 is mounted on the outer peripheral surface of the shoulder portion of the outer container 3 and the outer peripheral surface of the lower portion 38 of the cap body 21. First and second display portions 81 and 82 and a third display portion 83 for indicating which one of 42 is in contact are formed separately. The first and second display portions 81 and 82 and the third display portion 83 are covered with the shrink film. As a result, the first to third display portions 81 to 83 are exposed to the outside, which motivates the cap body 21 to rotate about the container axis O with respect to the container body 4 . This reduces the possibility of accidental rotation about the container axis O with respect to the container. Instead of the shrink film, another label or film such as a paper label may be wrapped around the first and second display portions 81 and 82 and the third display portion 83 to cover the outer container 3 and the cap. The first and second display portions 81 and 82 and the third display portion 83 may be covered by, for example, attaching a seal to the main body 21 . Moreover, the shrink film may be provided so as to cover the lid member 25 as well, for example, for the purpose of indicating that the discharge hole 31A has never been opened. In this case, perforations are appropriately formed in the shrink film, and at the start of use, the portion of the shrink film covering the lid member 25 is peeled off, and the first and second display portions 81 and 82 and the third display are displayed. By keeping the portion 83 covered with the shrink film, the lid member 25 is operated to discharge the contents. Also, the shrink film may not be provided.

A method of using the double container 1 configured as above will be described.
First, when the contents are to be discharged, the operating protrusion 75 of the lid member 25 is operated to rotate the lid member 25 around the hinge 74 to open the discharge hole 31A. After the discharge hole 31A is opened, the body portion of the outer container 3 is squeeze-deformed (elastically deformed) radially inward while the container main body 4 is tilted or turned upside down, for example, in a discharge posture. As a result, the inner container 2 is reduced radially inward together with the outer container 3, and the internal pressure of the inner container 2 is increased. Here, the valve body portion 53 moves upward in the housing cylinder portion 52 as the container body 4 is tilted or turned upside down. The upward movement of the valve body portion 53 is restricted by the restricting protrusion 52B.

When the internal pressure of the inner container 2 rises, the valve body 62 of the discharge valve 23 moves upward from the upper surface of the central portion 54 of the base portion 51 to open the communication hole 54A. Thereby, the discharge hole 31A and the inside of the inner container 2 are communicated through the communication hole 54A. The contents contained in the inner container 2 are discharged to the outside from the distal end of the discharge tube portion 33 through the communication hole 54A and the discharge hole 31A.

After that, when the squeeze deformation of the container body 4 is stopped or released, the internal pressure of the inner container 2 is lowered, and the valve body 62 of the discharge valve 23 is seated on the upper surface of the base portion 51 by the restoring deformation of the elastic arm 63 . As a result, the communication hole 54A is closed again, and communication between the discharge hole 31A and the inner container 2 is blocked.
Further, when the squeeze deformation of the container body 4 is stopped or released, 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 . This negative pressure moves the tip of the air valve 24 away from the lower surface of the top plate 31 to open the outside air introduction hole 31B. As a result, outside air flows between the outer container 3 and the inner container 2 through the outside air introduction hole 31B, the third ventilation groove 57A, the first and second ventilation grooves 11C and 38B, and the intake hole 11A. As a result, even if the outer container 3 is restored and deformed, the inner container 2 is separated from the inner surface of the outer container 3, and the inner container 2 remains in a state of being reduced and deformed.

When the container main body 4 is returned to the upright position in accordance with the stop of the squeeze deformation of the container main body 4, the valve body portion 53 in the housing cylinder portion 52 moves downward toward the diameter-reduced portion 52A by its own weight and contracts. Seated on diameter portion 52A. Even if the contents remain in the communication space S between the discharge cylinder part 33 and the base part 51 due to the suck-back effect accompanying the downward movement of the valve body part 53, the remaining contents will be removed from the storage cylinder part. Pulled into 52.
The valve body portion 53 moves downward toward the reduced diameter portion 52A and is seated on the reduced diameter portion 52A not only by its own weight but also by the negative pressure in the inner container 2 generated by the restoring force of the inner container 2. good too.
Here, even if the lid member 25 is closed before the outer container 3 is sufficiently restored and deformed after the contents are discharged, air such as a gap between the lid member 25 and the cap main body 21 may be trapped. Since outside air is introduced into the space between the outer container 3 and the inner container 2 through the flow path, the outer container 3 is sufficiently restored and deformed.

After that, when the outer container 3 is squeeze-deformed again, the air valve 24 is in contact with the lower surface of the top plate portion 31 from below, and the air valve 24 connects the inner container 2 and the outer container 3 through the outside air introduction hole 31B. Since the flow of air from the space to the outside is blocked, the internal pressure between the outer container 3 and the inner container 2 becomes positive pressure, and the inner container 2 is reduced in volume and deformed by this positive pressure. The contents are discharged through the tip of the discharge cylinder part 33 .
In addition, since it is also possible to move the valve body portion 53 upward toward the restricting projection 52B side by utilizing the increase in the positive pressure of the contents, the container body 4 must be tilted or turned upside down when the contents are discharged. no need to let

Subsequently, when discarding the double container 1 after using up the contents, first, the shrink film is peeled off. Then, as indicated by arrow A in FIG. 4B, the cap body 21 is rotated in the direction of releasing the screwing from the container body 4 . When the third display portion 83 provided on the cap main body 21 is aligned with the second display portion 82 provided on the outer container 3 in the circumferential direction, the cap main body 21 and the valve seat body inside the cap main body 21 are aligned. 41 moves upwards relative to air valve 24 . As a result, the air valve 24 is separated from the lower surface of the top plate portion 31 and comes into contact with the upper surface of the annular valve seat portion 42, as shown in FIGS. The lower end portion of the lower portion 38 of the outer cylinder portion 32 is still airtightly fitted to the outer peripheral surface of the lower cylinder portion 12 of the mouth portion 4A.

When the body portion of the outer container 3 is squeeze-deformed radially inward with the lid member 25 open, a positive pressure is generated between the outer container 3 and the inner container 2 . This positive pressure moves the tip of the air valve 24 away from the upper surface of the annular valve seat portion 42 to open the outside air introduction hole 31B. As a result, the air between the inner container 2 and the outer container 3 is discharged to the outside through the intake hole 11A, the first and second ventilation grooves 11C and 38B, the third ventilation groove 57A and the outside air introduction hole 31B. As a result, the outer container 3 is reduced in volume and deformed. After that, when the squeeze deformation of the container main body 4 is stopped, the air valve 24 comes into contact with the upper surface of the annular valve seat portion 42, and air flows from the outside to between the inner container 2 and the outer container 3 through the outside air introduction hole 31B. Since the flow is blocked, the outer container 3 is maintained in a reduced and deformed state. After that, the lid member 25 is closed as necessary. Even when the lid member 25 is closed, air is blocked from flowing between the outer container 3 and the inner container 2 from the outside through the outside air introduction hole 31B and the air intake hole 11A. Since the inflow of outside air through the gap is blocked, the volume-reduced and deformed state of the outer container 3 is maintained.

According to the double container 1 configured as described above, once the cap main body 21 is moved upward with respect to the air valve 24, the air between the outer container 3 and the inner container 2 is released through the intake hole 11A and the outside air. Since the state of volume reduction and deformation of the outer container 3 is maintained even after being discharged through the introduction hole 31B, it is possible to improve the working efficiency of the volume reduction and deformation.
Further, both when introducing outside air into the space between the outer container 3 and the inner container 2 and when discharging the air in the space between the outer container 3 and the inner container 2, the outside air introduction hole 31B can be used as a common hole.
Furthermore, even if the lid member 25 is closed before the outer container 3 is sufficiently restored and deformed after the contents are discharged, the outer container 3 and the contents will not be exposed to each other through the gap between the lid member 25 and the cap body 21 . Since outside air is introduced into the space between the container 2 and the outer container 3, the outer container 3 can be sufficiently restored and deformed. When the cover member 25 is closed after the air in the space between the outer container 3 and the inner container 2 is exhausted, the outer container 3 and the inner container are discharged from the outside through the outside air introduction hole 31B and the air intake hole 11A. 2, the inflow of outside air through the above-described gap is blocked, and the volume-reduced and deformed state of the outer container 3 can be maintained.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention.
For example, as a double container, a lamination peel type container in which the inner container is peelably laminated on the inner surface of the outer container is used, but it is not limited to this, and a gap is secured between the inner container and the outer container. It does not matter as a double container. However, a lamination-peel type container is preferable because it can improve versatility.
The cap main body rotates about the container axis with respect to the container main body, so that the air valve is brought into contact with the top plate portion, which is the first valve seat portion, and the annular valve seat portion, which is the second valve seat portion. However, the air valve can be moved up and down with respect to the container body, and thus the air valve, without being rotated about the container axis with respect to the container body. may be switched between a position at which it contacts the top plate portion that is the first valve seat portion and a position at which it contacts the annular valve seat portion that is the second valve seat portion. Alternatively, the two positions may be switched by moving the air valve with respect to the cap body.
Although the suck-back effect is obtained by the cylindrical housing portion and the valve body portion, the cylindrical housing portion and the valve body portion may not be provided.
Dispensing caps have lid members that are hinged to the cap body, but that are attachable to the cap body by means other than the hinge connection, provided that they are attachable to the cap body. may Also, the discharge cap may not have a lid member.

INDUSTRIAL APPLICABILITY According to the present invention, industrial applicability is recognized for a double container that can more easily maintain the deformed state of reduced volume of the outer container.

1 double container, 2 inner container, 3 outer container, 4 container body, 4A mouth portion, 5 discharge cap, 11A intake hole, 21 cap body, 23 discharge valve, 24 air valve, 25 lid member, 31 top plate portion ( first valve seat portion), 31A discharge hole, 31B outside air introduction hole, 42 annular valve seat portion (second valve seat portion)

Claims (2)

A container main body comprising an inner container that accommodates a content and is deformed in volume reduction as the content decreases, and an outer container in which the inner container is accommodated; a discharge cap in which a discharge hole for the contents is formed;
A double container in which an intake hole for sucking outside air is formed between the outer container and the inner container,
The discharge cap is
a cap body having an outside air introduction hole that allows communication between the outside and the intake hole;
a discharge valve for switching between communication and blocking between the discharge hole and the inside of the container body;
an air valve disposed inside the cap body for opening and closing the outside air introduction hole;
with
The cap body is
When the air valve abuts, air is permitted to flow from the outside through the outside air introduction hole to the intake hole side, while air is allowed to flow from the intake hole side through the outside air introduction hole to the outside. a first valve seat portion that blocks flow;
When the air valve abuts, air is prevented from flowing from the outside through the outside air introduction hole to the side of the intake hole, while air is prevented from flowing from the side of the intake hole through the outside air introduction hole to the outside. a second valve seat that allows flow;
has
The cap main body is arranged movably relative to the air valve so as to switch the air valve so as to abut on one of the first valve seat portion and the second valve seat portion. A double container, characterized in that The discharge cap is detachably attached to the cap body, and includes a cover member that opens and closes the discharge hole and the outside air introduction hole,
2. The double container according to claim 1, wherein an air inflow path is formed between the lid member and the cap body.

Images