JP6710468B2 - Discharge container - Google Patents

Description

The present invention relates to a discharge container including a container body having an outer layer body and an inner layer body, and a discharge cap having a discharge port and attached to the mouth portion.

Conventionally, cosmetics such as lotion, shampoo, rinse or liquid soap, as a discharge container for containing food seasonings and chemicals as contents, a container body having a double container structure composed of an outer layer body and an inner layer body, A discharge container including a discharge cap that has a discharge port through which contents are discharged and that is attached to a mouth portion is known (see Patent Document 1). In this discharge container, an outside air introducing hole penetrating the outer layer body is formed at the mouth of the container body, and the outside air is taken into the internal space between the outer layer body and the inner layer body through the outside air introducing hole. Has been done. Further, a valve body for opening and closing the flow path of the content is arranged inside the discharge cap, and the valve body allows the content to move from the accommodation space to the discharge port and is accommodated from the discharge port. It prevents the contents and outside air from flowing into the space.

In the discharge container having such a structure, when the contents are discharged, the valve body prevents the outside air from flowing into the container body from the discharge port, and the suction hole provided in the discharge cap is used to pass the outside air through the hole. By introducing the outside air into the internal space between the outer layer body and the inner layer body, only the inner layer body can be deformed by volume reduction. Therefore, the contents in the container body can be discharged without being replaced with the outside air, which makes it difficult for the contents remaining in the accommodation space of the container body to come into contact with the air and suppress its deterioration or deterioration. be able to.

JP, 2008-162666, A

By the way, in the above-described discharge container, although a screw-on type discharge cap having a female screw portion that engages with a male screw portion provided on the outer peripheral surface of the mouth portion is adopted, a high tampering prevention effect is high. For the purpose of obtaining the above, it is effective to use a cap type cap that is difficult to re-attach after opening.

However, in a discharge container that has an outside air introduction hole at its mouth and a discharge cap is attached so as to cover the outside air introduction hole, the airtightness (sealability) in the discharge cap is ensured and the discharge cap at the time of tapping is capped. It was difficult to be compatible with the insertability.

Therefore, it is an object of the present invention to provide a discharge container capable of achieving both airtightness inside the discharge cap and mountability of the discharge cap at the time of stoppering.

The present invention has been made to solve the above problems, and the discharge container of the present invention is an outer layer body having an outside air introduction hole at its mouth and a volume-deformable container housed inside the outer layer body. A container body having a transparent inner layer body,
A discharge cap that has a discharge port through which the contents are discharged and is attached to the mouth portion,
A valve body that opens and closes the flow path of the content inside the discharge cap,
The discharge cap includes a top wall portion on which the discharge port is formed, and a cylindrical side wall portion continuous with the top wall portion,
On the inner peripheral surface of the side wall portion, an annular second seal portion that is in contact with the first seal portion of the mouth portion provided below the outside air introduction hole over the entire circumference, and a mouth below the first seal portion. A second engaging portion that is undercut-engaged with the first engaging portion provided on the outer peripheral surface of the portion,
The outer diameter of the first seal portion is smaller than the outer diameter of the first engaging portion.

Further, in the discharge container of the present invention, the container body includes a neck ring that is provided below the first engaging portion at a distance and projects outward in the radial direction,
It is preferable that the lower surface of the neck ring constitutes a stopper support surface that is supported by a support tool when the discharge cap is stoppered in the mouth portion.

Further, in the discharge container of the present invention, it is preferable that the neck ring has a notched groove portion that is concave from the outer surface toward the inner side in the radial direction.

Further, in the discharge container of the present invention, on the outer peripheral surface of the mouth portion, a contour line in a vertical sectional view passing through the center axis of the mouth portion above the outside air introduction hole is substantially parallel to the center axis. It is preferable that a first straight surface that is a straight line and a second straight surface that is continuous above the first straight surface via a step portion and that has a smaller diameter than the first straight surface are provided.

According to the present invention, it is possible to provide a discharge container capable of achieving both airtightness inside the discharge cap and mountability of the discharge cap at the time of capping.

FIG. 3 is a cross-sectional view of a main part of the discharge container, which is one embodiment of the present invention, as viewed from the side.

Hereinafter, the present invention will be described more specifically by way of example with reference to the drawings. In the present specification, “upper” means a side (upper side in FIG. 1) where the discharge cap is located with respect to the container body when the discharge container is placed on a horizontal surface in an upright posture, and “lower”. Is the opposite side (lower side in FIG. 1).

As shown in FIG. 1, a discharge container 1 according to an embodiment of the present invention includes a container body 10, a discharge cap 20, an inner plug 30, a valve body 40, and a lid 50. The discharge container 1 can store various contents.

Although not shown in detail, the container body 10 has a bottle shape in which a cylindrical mouth portion 11 is provided, and a body portion and a bottom portion are provided below the mouth portion 11.

In the present embodiment, the container body 10 has a double container structure including an outer layer body 10a and an inner layer body 10b housed inside the outer layer body 10a. The container body 10 can be formed by extrusion blow molding in which a laminated parison having a layer forming the outer layer body 10a and a layer forming the inner layer body 10b is blow molded using a mold. In this example, the container body 10 is a laminated peeling container (derami container) in which the inner layer body 10b is arranged in a peelable manner on the inner surface of the outer layer body 10a, but the container body 10 is not limited to this. It may be a built-in type double container structure in which is incorporated into the outer layer body 10a.

The inner layer body 10b is formed of, for example, a synthetic resin material in the shape of a thin bag that can be deformed by volume reduction, and is laminated on the inner surface of the outer layer body 10a in a peelable manner. The inner layer body 10b wraps around to the opening end of the mouth portion 11 of the container body 10 and opens at the opening end, and the inside thereof is a storage space S for the contents.

The outer layer body 10 a is formed of, for example, a synthetic resin material in a bottle shape having a predetermined rigidity, and constitutes the outer shell of the container body 10. The portion of the outer layer body 10a corresponding to the body portion can be pressed (squeezed) and has a restoring property to the original shape. In addition, an outside air introduction hole 12 is provided in a portion of the outer layer body 10a corresponding to the mouth portion 11 so as to penetrate the outer layer body 10a in the radial direction and communicate with the inner layer body 10b and the outer layer body 10a. In the case shown in the figure, the two outside air introducing holes 12 are provided so as to be opposed to each other with the central axis of the mouth portion 11 interposed therebetween, but at least one outside air introducing hole 12 may be provided. Further, on the outer peripheral surface of the mouth portion 11, above the outside air introduction hole 12, the first straight surface 15 whose contour line in a vertical sectional view passing through the center axis of the mouth portion 11 is a straight line substantially parallel to the center axis 15 And a first stepped portion 16 (stepped portion) which is continuous above the first straight surface 15 and inclines upward in a tapered shape, and a contour which is continuous above the first stepped portion 16 and which is seen in a longitudinal section. The second straight surface 17 in which the line is a straight line substantially parallel to the central axis is provided. Since the first straight surface 15 is provided, the inner peripheral surface of the discharge cap 20 can be guided by the first straight surface 15 at the time of tapping, so that the discharge cap 20 is mounted on the mouth portion 11 in a stable posture. be able to. Further, since the area of the second straight surface 17 provided above the first straight surface 15 via the first step portion 16 has a smaller diameter than the area of the first straight surface 15, the area from the lower side of the discharge cap 20 can be changed. It becomes easy to insert the portion 11. Further, since the first step portion 16 is the inclined surface, the discharge cap 20 can be attached to the mouth portion 11 more smoothly. In the present embodiment, the second step portion 18 is provided below the first straight surface 15, and the diameter below the second step portion 18 is slightly larger than that of the first straight surface 15. There is.

On the outer peripheral surface of the outer layer body 10a forming the mouth portion 11, a first engaging portion 11a for retaining and holding the discharge cap 20 is integrally provided. The first engaging portion 11a may have a ring shape or may have an intermittent shape in the circumferential direction. The first engagement portion 11a is provided below the outside air introduction hole 12 in the axial direction (the vertical direction in this example) along the central axis of the mouth portion 11.

An annular recess 11d that is recessed radially outward is formed on the inner surface of the portion where the first engaging portion 11a is provided. However, if the depth of the recess 11d is too large, the first seal is formed. There is a possibility that the wall thickness of the portion 11b becomes thin and the strength decreases, or that the inner layer body 10b becomes difficult to peel from the outer layer body 10a. Therefore, it is preferable that the depth of the recess 11d be as small as possible.

Further, above the first engaging portion 11a, a first seal portion 11b, which is an annular convex portion protruding radially outward, is integrally provided. In the first seal portion 11b, the distance from the center axis of the mouth portion 11 to the radially outer end of the first seal portion 11b is from the center axis of the mouth portion 11 to the radially outer end of the first engaging portion 11a. It is configured to be smaller than the distance. That is, the first seal portion 11b has a smaller diameter than the first engagement portion 11a.

Further, a neck ring 13 that projects radially outward is provided below the first seal portion 11b. The lower surface 13a of the neck ring 13 constitutes a stoppering support surface that is supported by a supporting tool when the discharge cap 20 is attached to the mouth portion 11 by stoppering. In the present embodiment, the lower surface 13 a of the neck ring 13 constitutes a carrying support surface that is supported by a carrying jig when carrying the container body 10. The lower surface 13a of the neck ring 13 is located below the lower end surface 22c of the side wall portion 22 of the discharge cap 20 attached to the mouth portion 11 in the attached state. This allows the lower surface 13a of the neck ring 13 to be supported by the transfer jig and transferred even when the discharge cap 20 is mounted. Further, the lower surface 13a of the neck ring 13 forms a flat surface perpendicular to the axial direction. With such a configuration, it is possible to carry the sheet in a more stable state.

Further, in the present embodiment, the neck ring 13 is provided at a predetermined distance from the lower end surface 22c of the side wall portion 22 of the discharge cap 20 in the mounted state. The lower end surface 22c of the discharge cap 20 may be elastically deformed when the discharge cap 20 is strongly pushed down at the time of stoppering, and may protrude below the intended position. At that time, if the neck ring 13 is in a close position, the lower end surface 22c of the side wall portion 22 and the neck ring 13 may come into contact with each other. Therefore, by providing the neck ring 13 at a position spaced from the lower end surface 22c of the side wall portion 22 by a predetermined distance, mutual contact at the time of tapping is avoided, and deformation and damage of the discharge cap 20 and the container body 10 are surely performed. It becomes possible to prevent it.

An annular recess 13b is formed on the inner surface of the portion where the neck ring 13 is provided. If the depth of the recess 13b is too large, the strength of the neck ring 13 is reduced and the outer layer body 10a is not supported. Since the peelability of the inner layer body 10b may deteriorate, it is preferable that the depth of the recess 13b be as small as possible. In addition, in the present embodiment, the neck ring 13 has a notch-shaped groove portion 13c that is concave from the outer surface toward the inner side in the radial direction. In the present example, the groove portions 13c are provided at a plurality of locations in the circumferential direction, but the present invention is not limited to this, and may be one location. By providing such a groove portion 13c, the depth of the concave portion 13b on the inner surface side can be reduced, the strength can be increased (withstanding the plugging force of the discharge cap 20), and the angle of the concave portion 13b can be made gentle. As a result, the peelability of the inner layer body 10b from the outer layer body 10a can be improved.

The container body 10 is provided with a plurality of adhesive layers (adhesive bands) extending vertically between the outer layer body 10a and the inner layer body 10b to partially adhere the inner layer body 10b to the outer layer body 10a. It is also possible to have a different configuration. In addition, the container body 10 may have a configuration in which barrier layers having a barrier property against oxygen or water vapor are stacked, for example, or a configuration in which the barrier property is enhanced by various coatings.

The discharge cap 20 is made of, for example, a synthetic resin material, and is attached to the mouth portion 11 of the container body 10 so as to surround the inner plug 30. The discharge cap 20 includes a top wall portion 21 located above the partition wall 31 of the inner plug 30, and a cylindrical side wall portion 22 continuous with the top wall portion 21 and located radially outside the mouth portion 11. It is formed in a cylindrical shape. A second engaging portion 22a is provided on the inner peripheral surface of the side wall portion 22, and the second engaging portion 22a is undercut engaged with the first engaging portion 11a provided on the outer peripheral surface of the mouth portion 11. By doing so, the discharge cap 20 is fixedly held by the mouth portion 11 of the container body 10. In the present embodiment, the second engagement portion 22a is provided near the lower end portion of the side wall portion 22. The second engaging portion 22a may be an annular convex portion or a concave portion, but may be a convex portion or a concave portion having an intermittent shape in the circumferential direction.

The top wall portion 21 is integrally provided with a discharge cylinder 21a that projects upward from the top wall portion 21, and the inside thereof serves as a discharge port 23 for the contents. Further, the top wall portion 21 is provided with an intake hole 24 for taking in outside air. An air flow path from the intake hole 24 to the outside air introduction hole 12 is formed between the mouth portion 11 and the side wall portion 22. This air flow path is provided with, for example, a groove portion on at least one of the outer peripheral surface of the mouth portion 11 and the inner peripheral surface of the side wall portion 22, or a protrusion is provided on at least one of them to form a gap between them. It can be formed by things. A second seal portion 22b is formed on the inner peripheral surface of the side wall portion 22 to hermetically contact the outer surface of the first seal portion 11b over the entire circumference to seal the air passage. In the present embodiment, the second seal portion 22b is formed by an annular protrusion that slightly protrudes from the inner peripheral surface of the side wall portion 22, but it may not be a protrusion as long as it has an annular sealable shape.

The inner plug 30 is formed of, for example, a synthetic resin material, and is mounted inside the discharge cap 20. The inner plug 30 includes a partition wall 31 that covers the opening of the mouth portion 11, a sealing tubular portion 32 that projects from the lower surface of the partition wall 31 and contacts the inner peripheral surface of the mouth portion 11 (the inner peripheral surface of the inner layer body 10b), and the partition wall. The support cylinder portion 33 extends upward from the outer peripheral edge portion of 31. The outer diameter of the sealing tubular portion 32 is preferably set to be slightly larger than the inner diameter of the mouth portion 11. According to this, the outer peripheral surface of the sealing tubular portion 32 becomes the inner peripheral surface of the mouth portion 11. The airtightness can be enhanced by strongly abutting.

The upper end of the support tube portion 33 abuts the lower surface of the top wall portion 21 and fits the inner surface of the side wall portion 22 at the outer peripheral portion, whereby the inner plug 30 is fixedly held inside the discharge cap 20.

At the center of the partition wall 31, an outlet hole 31 a for the contents that penetrates the partition wall 31 is provided. The outflow hole 31a can communicate with the ejection port 23 provided in the ejection cap 20. The contents stored in the storage space S can flow out toward the discharge port 23 via the outflow hole 31a. An annular groove 31b that surrounds the outflow hole 31a is provided on the upper surface of the partition wall 31 of the inner plug 30 inside the support cylindrical portion 33 in the radial direction. A ventilation groove 31c that vertically penetrates the partition wall 31 is formed on the outer peripheral edge of the partition wall 31, and a communication groove 33a that communicates with the ventilation groove 31c is formed in the support cylinder portion 33.

The partition wall 31 is provided with a cylindrical wall 34 penetrating up and down, and a reduced diameter portion 34a that reduces in diameter downward is formed in the lower portion of the cylindrical wall 34. Inside the tubular wall 34, a movable valve body 35 that is movable in the axial direction of the tubular wall 34 is arranged. In the illustrated example, the moving valve body 35 is spherical, but the shape is not limited to this, and various shapes can be adopted.

The valve body 40 is arranged between the top wall portion 21 of the discharge cap 20 and the partition wall 31 of the inner plug 30, and opens and closes the outflow hole 31 a provided in the partition wall 31. Specifically, the valve body 40 allows the contents to move from the accommodation space S to the ejection port 23, and blocks the inflow of the contents and the outside air from the ejection port 23 to the accommodation space S. The valve body 40 is formed of, for example, low-density polyethylene (soft polyethylene), and has a cylindrical base portion 41 and a disc-shaped valve body 43 integrally connected to the inside of the base portion 41 via an elastic piece 42. ing. The upper end of the base 41 is fitted in an annular groove 21b provided on the lower surface of the top wall 21, and the lower end is fitted in an annular groove 31b of the partition wall 31 of the inner plug 30, Thus, the valve body 40 is fixedly held between the discharge cap 20 and the inner plug 30. In the present embodiment, the valve body 40 is in the form of a so-called three-point valve in which the valve body 43 is supported by the three elastic pieces 42, but a so-called one-point valve in which the valve body 43 is supported by one hinge. Etc., other forms of check valves can be used. Inside the base portion 41, a flow path of the content is formed from the outflow hole 31 a provided in the partition wall 31 to the discharge port 23 provided in the top wall portion 21. Further, on the outer side of the base portion 41, a flow path of air from the intake hole 24 toward the communication groove 33a and the ventilation groove 31c is formed.

The lid 50 is formed in a topped cylindrical shape having substantially the same diameter as the discharge cap 20, and is rotatably connected to the side wall portion 22 of the discharge cap 20 by a hinge 51 so as to cover the discharge cylinder 21a. It has become. A cylindrical sealing wall portion 52 is integrally provided on the inner surface of the lid body 50, and when the lid body 50 is closed, the sealing wall portion 52 fits inside the discharge cylinder 21a to close the discharge port 23. It is designed to be blocked. A grip portion 53 is provided on the side of the lid body 50 facing the hinge 51, which serves as a fingerhold when the lid body 50 is opened.

When the contents are discharged from the discharge container 1, the inner body is squeezed while the container body 10 is tilted so that the discharge cylinder 21a faces downward with the lid 50 open. 10b is pressed and the contents can be pushed out toward the outflow hole 31a. Thereby, the valve main body 43 can be opened, and the contents in the accommodation space S can be discharged from the outflow hole 31a toward the discharge port 23 and discharged from the discharge port 23 to the outside.

On the other hand, when the squeeze of the body is released after the contents are discharged, the outflow hole 31a is closed by the valve body 43, and the negative pressure generated when the outer layer body 10a is restored to the original shape causes air to flow from the intake hole 24. (Outside air) is introduced. The air introduced from the intake holes 24 passes through the communication groove 33a, the ventilation groove 31c, and the air flow path constituted by the gap formed between the mouth portion 11 and the side wall portion 22 and the like, and the inner layer body 10b and the outer layer body 10b. It flows into the internal space between 10a. In this way, by introducing the outside air between the inner layer body 10b and the outer layer body 10a, it is possible to restore the outer layer body 10a to the original shape while the inner layer body 10b is volume-deformed. Therefore, it is possible to suppress the introduction of outside air into the accommodation space S, reduce the contact of the contents contained in the container body 10 with the air, and suppress the alteration or deterioration of the contents. Further, when the discharge container 1 is placed in the tilted posture for discharging the contents, the moving valve body 35 moves to the valve body 43 side, and after discharging the contents, the discharge container 1 is returned to the original posture. When returning to the upright posture, the moving valve body 35 moves to the diameter reducing portion 34a side. Along with this, the contents in the discharge cylinder 21a can be drawn into the cylindrical wall 34 side through the gap between the elastic piece 42 and the valve body 43. With such a so-called suck back function, it is possible to prevent dripping from the discharge cylinder 21a.

In the discharge container 1 having the above-described configuration, the discharge cap 20 can be attached to the container body 10 by tapping, and the inside of the side wall portion 22 is formed by the first seal portion 11b and the second seal portion 22b. It is possible to seal the air flow path formed in the. Further, in the discharge container 1 of the present embodiment, the first engagement portion 11a having a diameter larger than that of the first seal portion 11b is provided below the first seal portion 11b of the mouth portion 11. Further, on the inner peripheral surface of the corresponding discharge cap 20, a second engaging portion 22a is provided near the lower end portion of the side wall portion 22, and a second seal portion 22b is provided above the second engaging portion 22a. With such a configuration, the second engaging portion 22a of the discharge cap 20 can easily pass through the first seal portion 11b of the mouth portion 11 (difficult to be caught) at the time of tapping, and the discharge cap can be smoothly performed. 20 can be plugged into the mouth 11. That is, according to the discharge container 1 of the present embodiment, it is possible to achieve both the airtightness inside the discharge cap 20 and the mountability of the discharge cap 20 at the time of tapping. Further, since the diameter of the first engagement portion 11a is larger than that of the first seal portion 11b, the fitting strength between the first engagement portion 11a and the second engagement portion 22a can be set higher.

In addition, by providing the neck ring 13, it is possible to withstand the downward stress applied at the time of stoppering. In particular, when the lower surface 13a of the neck ring 13 is a flat stopper supporting surface which is perpendicular to the axis of the container, it is possible to withstand a larger stress.

Further, in the discharge container 1 of the present embodiment, the discharge cap 20 is configured to be undercut-engaged with the mouth portion 11, so that a higher tamper opening prevention effect than that of the screw-type discharge cap is obtained. be able to.

The present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the spirit of the invention. For example, the lid 50 is not limited to the structure integrally connected to the discharge cap 20 by the hinge 51, but may be formed separately from the discharge cap 20 and attached to the discharge cap 20 by screwing or undercutting. .. Further, an outside air introduction valve that opens and closes the intake hole 24 may be provided. For example, an annular elastic piece that projects radially outward from the outer peripheral surface of the base portion 41 of the valve body 40 is provided, and the tip end thereof is brought into contact with the valve seat on the lower surface of the top wall portion 21 to close the intake hole 24. It can be configured.

DESCRIPTION OF SYMBOLS 1 Discharge container 2 Discharge container 10 Container main body 10a Outer layer body 10b Inner layer body 11 Mouth portion 11a First engaging portion 11b First seal portion 11c Lower surface (transport support surface)
12 Outside air introduction hole 13 Neck ring 13a Lower surface (capping support surface)
15 First Straight Surface 16 First Step (Step)
17 2nd straight surface 18 2nd level difference part 20 Discharge cap 21 Top wall part 21a Discharge cylinder 21b Annular groove 22 Side wall part 22a 2nd engaging part 22b 2nd seal part 22c Lower end face 23 Discharge port 24 Air intake hole 30 Inner plug 31 Partition wall 31a Outflow hole 31b Annular groove 31c Vent groove 32 Sealing cylinder part 33 Supporting cylinder part 33a Communication groove 34 Cylindrical wall 34a Reduced diameter part 35 Moving valve body 40 Valve body 41 Base 42 Elastic piece 43 Valve body 50 Lid body 51 Hinge 52 sealing wall part 53 picking part S accommodation space

Claims (4)

A container body having an outer layer body having an outside air introduction hole at a mouth and an inner layer body capable of undergoing volume reduction deformation accommodated inside the outer layer body,
A discharge cap that has a discharge port through which the contents are discharged and is attached to the mouth portion,
A valve body that opens and closes the flow path of the content inside the discharge cap,
The discharge cap includes a top wall portion on which the discharge port is formed, and a cylindrical side wall portion continuous with the top wall portion,
On the inner peripheral surface of the side wall portion, an annular second seal portion that is in contact with the first seal portion of the mouth portion provided below the outside air introduction hole over the entire circumference, and a mouth below the first seal portion. A second engaging portion that is undercut-engaged with the first engaging portion provided on the outer peripheral surface of the portion,
A discharge container, wherein the outer diameter of the first seal portion is smaller than the outer diameter of the first engaging portion. The container body includes a neck ring that is provided below the first engaging portion with a space and projects radially outward.
The discharge container according to claim 1, wherein a lower surface of the neck ring constitutes a stopper supporting surface which is supported by a support tool when the discharge cap is stoppered in the mouth portion. The discharge container according to claim 2, wherein the neck ring has a notch-shaped groove that is concave from the outer surface toward the inner side in the radial direction. On the outer peripheral surface of the mouth portion, a first straight surface having a contour line in a vertical sectional view passing through the center axis of the mouth portion above the outside air introduction hole and being a straight line substantially parallel to the center axis; The discharge container according to any one of claims 1 to 3, further comprising: a second straight surface having a smaller diameter than the first straight surface, the second straight surface being continuous with a step portion above the first straight surface.

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