JP2020083462A - Dispensing container - Google Patents

Abstract

To provide a dispensing container in which an outer layer body can be restored reliably to an original shape after contents are dispensed.SOLUTION: A dispensing container 1 that includes a container body 10 having an outer layer body 11 and an inner layer body 12 and having an outside air introduction port 13, and a dispensing cap 20 having a dispensing opening 23 and being attached to a mouth portion 10a of the container body 10 comprises: a contents check valve 42 provided in the dispensing cap 20 and for blocking communication between the dispensing opening 23 and an inside of the inner layer body 12, while being opened by a pressure increase inside the inner layer body 12 to communicate the inside of the inner layer body 12 with the dispensing opening 23; and an outside air introduction check valve 43 for blocking the communication with the outside of the outside air introduction port 13 by being abutted on a valve seat 28, and communicates with the outside of the outside air introduction port 13 by being opened with negative pressure generated between the outer layer body 11 and the inner layer body 12. A fine air passage 60 is provided between the valve seat 28 and the outside air introduction check valve 43 which is abutted on the valve seat 28.SELECTED DRAWING: Figure 4

Description

The present invention relates to a dispensing container.

As a container for containing liquid or fluid contents such as cosmetics such as lotion, shampoo, rinse, liquid soap, food seasonings such as soy sauce, or chemicals, the squeezeable outer layer and outer layer are contained. A container body having a double structure having an inner layer body that can be deformed and reduced in volume, and a pouring cap equipped with a spout for the contents and attached to the mouth portion of the container body, and the body portion of the container body is squeezed. A squeeze type dispensing container is known in which a desired amount of contents can be dispensed from a spout by (pressing) and deforming the inner layer body to reduce its volume (see, for example, Patent Document 1). ..

In the above-mentioned pouring container, the pouring cap blocks the communication between the pouring outlet and the inside of the inner layer body, while it is opened by the pressure increase inside the inner layer body due to the squeeze of the body part to pour the inside of the inner layer body A check valve for contents is provided to communicate with the outlet. Further, the container body is provided with an outside air introduction port that communicates between the outer layer body and the inner layer body, and in order to open and close the outside air introduction port, the spout cap is brought into contact with the valve seat to introduce the outside air. A non-return valve for outside air introduction that opens the outside air introduction port to the outside while blocking the communication with the outside of the mouth while opening due to the negative pressure generated between the outer layer body and the inner layer body when the squeeze of the body is released Is provided.

With such a structure, when the body is squeezed and the contents are poured out, the check valve for introducing the outside air prevents the air between the outer layer body and the inner layer body from leaking to the outside. The squeeze of the body is effectively transmitted to the inner layer body via the air between the outer layer body and the inner layer body, so that the contents can be easily and surely poured out. On the other hand, when the squeeze of the body is released after pouring out the contents, the check valve for contents is closed to prevent the introduction of outside air from the pouring outlet to the inside of the inner layer body and the check valve for outside air introduction. Since the valve is opened and the outside air is introduced between the outer layer body and the inner layer body through the outside air introduction port, only the outer layer body can be restored to the original shape while the inner layer body is deformed and reduced in volume. As a result, the contents contained in the inner layer body can be poured out without being replaced with the outside air, so that it is difficult for the contents remaining inside the inner layer body to come into contact with air, and its deterioration or deterioration is caused. Can be suppressed.

JP, 2017-100748, A

However, in the conventional pouring container, when the checkability for the outside air introduction check valve is too high, when the squeeze is released and the outer layer body is restored to its original shape, the outer layer body and the inner layer body are discharged from the outside air introduction port. There was a problem that it became difficult to introduce outside air into and between. In particular, when the outer layer body has a relatively low resilience, such as when the body is formed into a rectangular tube shape, an elliptic tube shape, or a flat tube shape, or when the outer layer body is formed of a soft material. However, there is a problem in that, after the squeeze is released, the check valve for introducing outside air is closed during the restoration of the outer layer body, and the outer layer body may not be restored to the original shape.

The present invention has an object to solve such problems, and an object thereof is to provide a pouring container capable of reliably restoring the outer layer body to the original shape after pouring out the contents. To provide.

The pouring container of the present invention has a double structure having a squeezeable outer layer body and a volume-reducible inner layer body housed in the outer layer body, and between the outer layer body and the inner layer body. A pouring container having a container body provided with a communicating outside air introduction port, a pouring port equipped with a pouring port for contents, and attached to the mouth part of the container body, the pouring cap being provided on the pouring cap. A check valve for contents, which blocks the communication between the pouring outlet and the inside of the inner layer body and opens by the pressure increase inside the inner layer body to communicate the inside of the inner layer body with the pouring outlet. And for abutting against the valve seat to block the communication with the outside of the outside air introduction port, while opening by the negative pressure between the outer layer body and the inner layer body to communicate the outside air introduction port with the outside A check valve, and a fine air passage is provided between the valve seat and the check valve for introducing outside air, which is in contact with the valve seat.

In the pouring container of the present invention having the above structure, it is preferable that the narrowest cross-sectional area of the air passage is 0.002 mm ² or more and less than 0.02 mm ² .

In the pouring container of the present invention having the above structure, it is preferable that the narrowest cross-sectional area of the air passage is 0.004 mm ² or more and less than 0.01 mm ² .

The pouring container of the present invention, in the above configuration, has a valve body side contact surface that abuts the valve seat of the outside air introduction check valve and a valve seat side abutment that abuts the outside air introduction check valve of the valve seat. A protrusion protruding toward the other of the valve body side contact surface and the valve seat side contact surface is provided on one of the contact surfaces, and the air passage is provided on both sides of the protrusion. Is preferred.

The pouring container of the present invention, in the above configuration, has a valve body side contact surface that abuts the valve seat of the outside air introduction check valve and a valve seat side abutment that abuts the outside air introduction check valve of the valve seat. One of the contact surfaces is provided with a groove that is recessed in a direction away from the other of the valve body side contact surface and the valve seat side contact surface, and the groove forms the air passage. Is preferred.

According to the present invention, it is possible to provide a pouring container capable of reliably restoring the outer layer body to the original shape after pouring out the contents.

It is sectional drawing which shows the principal part of the extraction container which is one Embodiment of this invention. It is a top view of the valve member shown in FIG. It is sectional drawing which expands and shows the contact part of a valve seat and the check valve for external air introduction. (A) is an enlarged plan view showing a portion provided with a projection of the check valve for introducing the outside air, (b) is a cross-sectional view taken along the line AA in the same figure (a), (c) [Fig. 4] is an enlarged cross-sectional view showing a contact portion between a valve seat and a portion of the check valve for introducing outside air provided with a protrusion. (A) is an enlarged plan view showing a portion provided with a concave groove of a check valve for introducing outside air of a modified example, (b) is a sectional view taken along the line BB in the same figure (a). FIG. 3C is an enlarged sectional view showing a contact portion between the valve seat and the portion of the check valve for introducing the outside air where the concave groove is provided. (A) is an enlarged sectional view showing a portion of the valve seat provided with a projection, (b) is a bottom view of the valve seat shown in (a) of FIG. [Fig. 4] is a cross-sectional view showing, in an enlarged manner, a contact portion between a portion of the valve seat provided with a protrusion and the check valve for introducing the outside air. (A) is an enlarged sectional view showing a portion of the valve seat where the groove is provided, (b) is a bottom view of the valve seat shown in (a) of FIG. FIG. 3C is an enlarged cross-sectional view of a contact portion between a portion of the valve seat provided with the groove and the outside air check valve. It is sectional drawing which shows the principal part of the extraction container which is other embodiment of this invention. FIG. 9 is a plan view of the valve member shown in FIG. 8.

Hereinafter, the present invention will be described more specifically by way of example with reference to the drawings. In this specification, the side on which the spout cap is located (the upper side in FIG. 1) with respect to the container body is “upper” and the opposite side is “lower”.

As shown in FIG. 1, a pouring container 1 according to an embodiment of the present invention has a container body 10 and a pouring cap 20.

The container body 10 has a double structure including an outer layer body 11 and an inner layer body 12. The outer shape of the container body 10 is a bottle shape having a cylindrical mouth portion 10a and a bottomed tubular body portion 10b.

The outer layer body 11 constitutes an outer shell of the container body 10, and has a bottle shape having a mouth portion 11a corresponding to the mouth portion 10a of the container body 10 and a body portion 11b corresponding to the body portion 10b. The outer layer body 11 may be formed of a synthetic resin material such as polypropylene (PP), polyethylene (PE), or polyethylene terephthalate (PET). The body portion 11b of the outer layer body 11 has flexibility and can be squeezed (pressed). That is, the body portion 11b of the outer layer body 11 can be dented by being squeezed, and can be restored to its original shape by its own elastic force from the dented state when the squeezing is released.

The inner layer body 12 is formed of a synthetic resin material such as ethylene-vinyl alcohol copolymer (EVOH) or polyethylene terephthalate (PET) into a bag shape that is thinner and more flexible than the outer layer body 11. It is housed in the outer layer body 11 in a state of being peelably laminated on the inner surface. The opening of the inner layer body 12 is connected to the opening end of the mouth portion 11a of the outer layer body 11, and the inside of the inner layer body 12 serves as a storage space 12a for the contents. The inner layer body 12 can be peeled off from the inner surface of the outer layer body 11 as the contents are poured out from the accommodation space 12a, and the volume can be deformed so as to reduce the inner volume.

As described above, in the present embodiment, the container body 10 is configured as a laminated peeling container which is a type of double container. Such a container body 10, which is also called a delamination container, is formed by, for example, co-extruding a synthetic resin material for the outer layer body 11 and a synthetic resin for the inner layer body 12 which have low compatibility to each other to form a laminated parison. Alternatively, it may be formed by extrusion blow molding in which blow molding is performed using a mold. Further, the container body 10 is formed by biaxially stretch-blow molding a double preform made of a synthetic resin containing an inner preform for the inner layer body 12 inside the outer preform for the outer layer body 11. It can also be In this case, the double preform may be one in which both the outer preform for the outer layer body 11 and the inner preform for the inner layer body 12 are formed of polyethylene terephthalate (PET).

The container body 10 is not limited to the laminated peeling container as described above, and a double container having a configuration in which the inner layer body 12 formed separately from the outer layer body 11 is incorporated inside the outer layer body 11 can be adopted.

The mouth portion 11 a of the outer layer body 11 is provided with an outside air introduction port 13 that communicates between the outer layer body 11 and the inner layer body 12. The outside air introduction port 13 is provided as a through hole penetrating the mouth portion 11 a of the outer layer body 11 and can introduce outside air from the outside of the container body 10 between the outer layer body 11 and the inner layer body 12.

In the present embodiment, the mouth portion 11a of the outer layer body 11 is provided with the pair of outside air introduction ports 13 facing each other, but at least one outside air introduction port 13 may be provided.

The spout cap 20 has a cap body 21 made of, for example, a synthetic resin. The cap main body 21 is formed in a toped tubular shape including a top wall 21a and a cylindrical mounting tubular portion 21b that is integrally provided on the outer peripheral edge of the top wall 21a, and the mounting tubular portion 21b is a mouth portion. The top wall 21a is attached to the mouth 10a so as to surround the outer periphery of the mouth 10a and to cover the open end of the mouth 10a.

In the illustrated case, a female screw 22 is provided on the inner peripheral surface of the mounting cylinder portion 21b, and the female screw 22 is screwed to the male screw 14 provided on the outer peripheral surface of the mouth portion 11a, so that the pouring cap 20 is closed. It is attached to the portion 10a. The spout cap 20 may be configured to be attached to the mouth portion 10a by plugging using undercut engagement.

A cylindrical spout 23 is integrally provided on the upper surface of the top wall 21a. The spout 23 can spout the contents contained in the container body 10 to the outside. In the present embodiment, the spout 23 is formed in a tubular shape that curves outward while gradually expanding in diameter upward from the top wall 21a. Various changes can be made according to the contents stored in the storage space, the use, and the like. Further, the spout 23 is not limited to a cylindrical shape that projects from the top wall 21a, but may be formed as a hole that penetrates the top wall 21a but does not project from the top wall 21a.

A lid 24 is integrally provided on the dispensing cap 20. The lid 24 is formed in a topped cylindrical shape having substantially the same diameter as the mounting cylinder portion 21b of the pouring cap 20, and is openably and closably connected to the pouring cap 20 via a hinge 25 at a part of the outer peripheral surface thereof. Has been done. A tubular obstruction plug 26 is integrally provided on the back surface of the lid body 24, and when the lid body 24 is closed, the obstruction plug 26 is fitted to the inner peripheral surface of the spout 23 to close the spout 23. It has become so.

The spout cap 20 has an inner plug 30. The inner plug 30 is attached to the opening end of the mouth 10a and covers the opening end. A cylindrical engaging wall 31 that rises upward is integrally provided on the outer peripheral edge of the inner plug 30, and the upper end of the engaging wall 31 contacts the lower surface of the top wall 21 a of the pouring cap 20. ing. Thereby, a predetermined space is provided between the inner plug 30 and the top wall 21a.

The inner stopper 30 is provided with an outlet 32 for the contents. The outflow hole 32 vertically penetrates the inside plug 30, and the housing space 12 a communicates with the space between the inside plug 30 and the top wall 21 a via the outflow hole 32. Therefore, the contents contained in the container body 10 can flow out toward the pouring outlet 23 through the outflow hole 32.

The dispensing cap 20 is provided with a valve member 40 formed of an elastic body such as low density polyethylene (LDPE). The valve member 40 has a cylindrical annular wall 41, the check valve 42 for contents is integrally provided inside the annular wall 41, and the check valve 43 for introducing outside air is integrally provided outside the annular wall 41. There is. The valve member 40 is not limited to low density polyethylene, and may be formed of another elastic body such as rubber or elastomer.

The annular wall 41 is arranged between the top wall 21 a and the inner plug 30, and the space between the top wall 21 a and the inner plug 30 is defined by the flow path portion of the contents inside the annular wall 41 and the annular wall 41. Is also partitioned into a flow path portion for the outside air (outside air). The spout 23 and the outflow hole 32 are in communication with the flow path portion for the contents inside the annular wall 41.

As shown in FIG. 2, the check valve 42 for contents includes a valve body 42a formed in a disc shape, and three elastically deformable legs 42b connecting the valve body 42a and the annular wall 41. It is a three-point valve with. The valve body 42a is arranged on the upper surface of the inner plug 30 facing the top wall 21a side, closes the outflow hole 32, and shuts off the communication between the spout 23 and the inside of the inner layer body 12 (accommodation space 12a). ing. When the pressure inside the inner layer body 12 rises, the valve body 42 a elastically deforms the three legs 42 b and moves in a direction away from the upper surface of the inner plug 30 as the pressure rises. The outflow hole 32 can be opened. That is, the check valve 42 for contents shuts off the communication between the spout 23 and the inside of the inner layer body 12 (the accommodation space 12 a ), while it is opened by the pressure increase inside the inner layer body 12 to open the inner layer body 12. The inside can be communicated with the spout 23.

As shown in FIG. 1, the inner plug 30 is provided with a cylindrical tubular wall 33 that is located on the side opposite to the hinge 25 with respect to the outflow hole 32 and extends toward the accommodation space 12a. There is. At the lower end of the cylindrical wall 33, a reduced diameter portion 33a is provided, the inner diameter of which narrows downward. Inside the cylindrical wall 33, a spherical valve (ball valve) 34 made of steel or resin is arranged. When the container body 10 is in an inclined posture in which the tubular spout 23 is directed downward, the spherical valve 34 moves inside the tubular wall 33 toward the spout 23. Then, after the contents are poured out, when the container body 10 is returned to the standing posture (upright posture) so that the cylindrical spout 23 faces upward, the spherical valve 34 moves inside the cylindrical wall 33. The contents moving in the downward direction until they come into contact with the reduced diameter portion 33a and remaining in the spout 23 are sucked toward the inside of the cylindrical wall 33. As a result, the amount of liquid remaining inside the spout 23 can be reduced and liquid dripping from the spout 23 can be prevented. In this way, the spherical valve 34 functions as a suckback mechanism for preventing liquid from the spout 23.

The lower end of the mounting cylinder portion 21b of the pouring cap 20 is airtightly fitted to the lower portion of the mouth portion 10a of the container body 10, whereby an air flow path is provided between the mouth portion 10a and the mounting cylinder portion 21b. P is provided. The air flow path P communicates with the outside air introduction port 13.

On the other hand, an opening 27 is provided in the top wall 21a of the pouring cap 20, and the opening 27 has an air flow through a through hole 35 provided at a connecting portion between the inner plug 30 and the engagement wall 31. It communicates with the road P. The male screw 14 is provided with a slit that constitutes a part of the air flow path P.

As shown in FIGS. 1 and 2, the check valve 43 for introducing outside air, which is provided on the outer side of the annular wall 41, extends radially outward from the entire circumference of the outer peripheral surface of the annular wall 41 and protrudes downward. An annular membranous portion 43a that is curved so that it is integrally provided with an outer peripheral edge portion 43b that bends downward from the outer peripheral end of the membranous portion 43a, and a connecting portion between the membranous portion 43a and the outer peripheral edge portion 43b. The upper surface of the is a ring-shaped valve body side contact surface 43c.

As shown in FIG. 1 and FIG. 3, the lower surface of the top wall 21a of the cap body 21 is a valve seat 28, and the check valve 43 for introducing the outside air has a valve body side contact surface 43c at the valve seat side of the valve seat 28. The opening 27 is closed by making contact with the contact surface 28a over the entire circumference. That is, the check valve 43 for introducing outside air reaches the outside air introduction port 13 from the opening 27 through the through hole 35 and the air flow path P by contacting the valve seat side contact surface 28a of the valve seat 28. The air path is cut off to cut off communication with the outside of the outside air inlet 13. On the other hand, in the check valve 43 for introducing outside air, when the negative pressure is generated between the outer layer body 11 and the inner layer body 12, the negative pressure causes the valve body side contact surface 43 c to be the valve seat side contact surface of the valve seat 28. The film portion 43a is elastically deformed and opened so as to be separated from 28a. When the check valve 43 for introducing the outside air is opened, the outside air introduction port 13 communicates with the outside of the pouring container 1 through the opening 27, the through hole 35, and the air flow path P. When the negative pressure between the outer layer body 11 and the inner layer body 12 decreases, the outside air check valve 43 is restored to its original shape by its own elastic force, so that the check valve 43 on the valve seat side contact surface 28a is completely covered. It abuts over the circumference and closes the opening 27.

In the pour-out container 1 having the above structure, when the body portion 10b of the container body 10 is squeezed (pressed) to reduce the volume of the inner layer body 12, the inner pressure of the inner layer body 12 rises and the non-return check for contents occurs. The valve 42 is opened, and the contents stored in the storage space 12a of the inner layer body 12 can be poured out to the outside through the outflow hole 32 and the spout 23. Further, when the body portion 10b is squeezed and the contents are poured out, the outside air check valve 43 shuts off the communication with the outside of the outside air introduction port 13, so that the outer layer body 11 and the inner layer body 12 are separated from each other. Since this air is prevented from leaking to the outside through the outside air introduction port 13, the squeeze of the body portion 10b is effectively transmitted to the inner layer body 12 through the air between the outer layer body 11 and the inner layer body 12. In this way, the contents can be easily and surely poured out.

On the other hand, in the pouring container 1 having the above configuration, when the squeeze of the body portion 10b is released after the pouring of the contents, the check valve 42 for the contents is closed to the inside of the inner layer body 12 from the pouring outlet 23. The introduction of the outside air is blocked, the outside air check valve 43 is opened, and the outside air is introduced between the outer layer body 11 and the inner layer body 12 through the outside air introduction port 13. Therefore, only the outer layer body 11 can be restored to the original shape while the inner layer body 12 is deformed by volume reduction, so that the content contained in the inner layer body 12 can be poured out without being replaced with the outside air. As much as possible, it is possible to suppress the deterioration and alteration of the contents remaining inside the inner layer body.

As shown in FIGS. 4A and 4B, the projection 50 is integrally provided on the valve body side contact surface 43c of the check valve 43 for introducing outside air. The projection has a spherical outer surface and projects from the valve body side contact surface 43c toward the valve seat side contact surface 28a. By providing the protrusion 50 on the valve body side contact surface 43c, as shown in FIG. 4C, the valve seat 28 (valve seat side contact surface 28a) and the valve seat 28 (valve seat side contact surface). 28a) is provided with a pair of fine air passages 60 on both sides of the protrusion 50 between the check valve 43 for introducing outside air (the valve body side contact surface 43c).

The air passage 60 communicates with the side of the opening 27 and the side of the outside air introduction port 13 when the check valve 43 for outside air introduction is closed. Thereby, when the check valve 43 for introducing the outside air is closed, the communication between the outside air introducing port 13 and the outside is not completely blocked by the check valve for introducing the outside air 43, and the outside air introducing port is passed through the air passage 60. A slight amount of outside air can be introduced into 13.

Therefore, after the body portion 10b is squeezed and the contents are poured out, when the squeeze is released and the outer layer body 11 is restored to the original shape, the check valve 43 for introducing outside air is closed during the restoration of the outer layer body 11. Even when the outer layer body 11 is lost, the outer layer body 11 can be surely restored to its original shape by slightly introducing the outer air into the outer air introduction port 13 through the pair of air passages 60. Further, the outer layer body 11 can be quickly restored to the original shape. In particular, when the body portion 10b is formed in a rectangular tube shape, an elliptic tube shape, or a flat tube shape, or when the outer layer body 11 is formed of a soft material, the outer layer body 11 has a relatively high resilience. When it is very low, the above effect can be remarkably obtained.

As described above, in the pouring container 1 of the present embodiment, since the fine air passage 60 is provided between the valve seat 28 and the check valve 43 for introducing the outside air, the body portion 10b is squeezed and the contents are After the substance is poured out, when the squeeze is released and the outer layer body 11 is restored to its original shape, the outside air is easily introduced between the outer layer body 11 and the inner layer body 12 through the outer air introduction port 13, The body 11 can be reliably restored to the original shape.

In the present embodiment, the protrusion 50 is provided on the valve body side contact surface 43c of the check valve 43 for introducing the outside air so that the fine air passage 60 is provided between the valve seat 28 and the check valve for introducing the outside air 43. However, the present invention is not limited to this, and as shown in FIG. 5, a concave groove 51 is provided on the valve body side contact surface 43c of the check valve 43 for introducing the outside air, and the concave groove 51 functions as the air passage 60. You can The recessed groove 51 is formed as a notch groove that radially cuts out a part of the valve body side contact surface 43c.

In this configuration as well, after the body portion 10b is squeezed and the contents are poured out, when the squeeze is released and the outer layer body 11 is restored to the original shape, the check valve for introducing outside air is restored during the restoration of the outer layer body 11. Even when 43 is closed, the outside air is slightly introduced into the outside air introduction port 13 through the air passage 60 formed by the concave groove 51, and the outer layer body 11 is surely returned to the original shape. Can be restored.

In the present embodiment, the projection 50 or the concave groove 51 is provided on the valve body side contact surface 43c of the check valve 43 for introducing the outside air, but the projection 50 or the concave groove 51 is provided on the valve seat side of the valve seat 28. The structure may be provided on the contact surface 28a.

For example, as shown in FIG. 6, a long projection extending on the valve seat side contact surface 28a of the valve seat 28 along the radial direction of the check valve 43 for introducing the outside air so as to straddle the valve body side contact surface 43c. By providing 52, a pair of fine air passages 60 may be provided on both sides of the protrusion 52 between the valve seat 28 and the check valve 43 for introducing outside air.

In this configuration as well, after the body portion 10b is squeezed and the contents are poured out, when the squeeze is released and the outer layer body 11 is restored to the original shape, the check valve for introducing outside air is restored during the restoration of the outer layer body 11. Even when 43 is closed, the outer layer body 11 is returned to its original shape by slightly introducing the outside air into the outside air introduction port 13 through the pair of air passages 60 formed on both sides of the protrusion 52. You can surely restore up to.

In addition, as shown in FIG. 7, a long concave portion extending along the radial direction of the check valve 43 for introducing outside air is provided on the valve seat side contact surface 28a of the valve seat 28 so as to straddle the valve body side contact surface 43c. A groove 53 may be provided and the concave groove 53 may function as the air passage 60.

In this configuration as well, after the body portion 10b is squeezed and the contents are poured out, when the squeeze is released and the outer layer body 11 is restored to the original shape, the check valve for introducing outside air is restored during the restoration of the outer layer body 11. Even when 43 is closed, the outside air is slightly introduced into the outside air introduction port 13 through the air passage 60 formed by the concave groove 53, and the outer layer body 11 is surely returned to the original shape. Can be restored.

Here, the air passage 60 provided between the valve seat 28 and the check valve 43 for introducing the outside air has a cross-sectional area perpendicular to the flow passage direction in the narrowest portion thereof, which squeezes the body portion 10b to store the contents. At the time of pouring out, even if the air between the outer layer body 11 and the inner layer body 12 is discharged to the outside from the opening 27 through the air passage 60, the contents are spouted when the body portion 10b is squeezed. It is formed so that it can be appropriately poured from 23. In the case where a plurality of air passages 60 are provided between the valve seat 28 and the check valve 43 for introducing outside air, the total cutoff is the sum of the cross-sectional areas perpendicular to the flow passage direction in the narrowest part of each air passage 60. Each air passage 60 is formed so that the area has the above-described size. Thereby, the outer layer body 11 is surely restored to the original shape after pouring out the contents without deteriorating the usability or operability when squeezing the body portion 10b and pouring out the contents. be able to.

The cross-sectional area perpendicular to the flow path direction in the narrowest part of the air passage 60 provided between the valve seat 28 and the check valve 43 for introducing the outside air is 0.002 mm ² or more and less than 0.02 mm ^2. It is more preferably 0.004 mm ² or more and less than 0.01 mm ² . With this setting, the outer layer body 11 is reliably restored to its original shape after pouring out the contents while maintaining a good usability or operability when squeezing the body portion 10b and pouring out the contents. It can be configured to.

For example, when the diameter of the valve body side contact surface 43c of the outside air check valve 43 at the radial center is 17.2 mm, the protrusions 50 and 52 protrude from the valve body side contact surface 43c or the valve seat side contact surface 28a. The height is 0.03 mm or more and less than 0.05 mm, or the depth of the concave grooves 51, 53 from the valve body side contact surface 43c or the valve seat side contact surface 28a is 0.03 mm or more and less than 0.05 mm. By doing so, the cross-sectional area perpendicular to the flow path direction in the narrowest part of the air passage 60 can be within the above numerical range.

FIG. 8 is a cross-sectional view showing a main part of a dispensing container 1 according to another embodiment of the present invention, and FIG. 9 is a plan view of the valve member 40 shown in FIG. The members corresponding to the members described above in FIGS. 8 and 9 are designated by the same reference numerals.

The check valve 43 for introducing outside air is not limited to the configuration shown in FIG. 2, but as shown in FIGS. 8 and 9, the outer peripheral edge portion is formed in a disc shape protruding upward toward the valve seat 28 side. Alternatively, a part of the outer peripheral surface of the annular wall 41 may be integrally connected by a hinge portion 44. In this case, the valve seat 28 is formed in a circular shape having a diameter corresponding to the outside air introduction check valve 43, and the annular valve seat side contact surface 28a of the valve seat 28 is provided with an outer peripheral edge portion of the outside air introduction check valve 43. The valve body side contact surface 43c provided on the upper surface abuts, so that the communication between the outside air inlet and the outside is blocked. On the other hand, when the pressure between the outer layer body 11 and the inner layer body 12 becomes negative, the check valve 43 for introducing the outside air is pulled downward by the negative pressure and moves away from the valve seat 28 with the hinge portion 44 as a fulcrum. It is rotated and opened to communicate the outside air introduction port with the outside.

In the pour-out container 1 shown in FIG. 8 as well, the check valve 43 for outside air introduction shown in FIG. 2 is used by providing the projection 50 on the valve body side contact surface 43c of the check valve 43 for outside air introduction. As in the case where the outer layer body 11 is restored to its original shape after the body portion 10b is squeezed and the contents are poured out, when the outer layer body 11 is restored to its original shape, a check valve for outside air introduction is provided during the restoration of the outer layer body 11. Even when the valve 43 is closed, the outer layer body 11 can be reliably restored to the original shape by slightly introducing the outer air into the outer air introduction port 13 through the air passage 60. The effect can be obtained.

Also in the dispensing container 1 shown in FIG. 8, the valve body side contact surface 43c may be provided with a recessed groove 51 instead of the protrusion 50, or the valve body side contact surface 43c may be provided with the protrusion 50 or the recessed groove 51. It is also possible to provide the projection 52 or the concave groove 53 on the valve seat side contact surface 28a without providing the above.

It is needless to say that the present invention is not limited to the above-mentioned embodiment and can be variously modified without departing from the scope of the invention.

For example, in the above-described embodiment, the projections 50, 52 or the recessed grooves 51, 53 are provided on one of the valve body side contact surface 43c of the check valve 43 for outside air introduction and the valve seat side contact surface 28a of the valve seat 28. The projections 50 and 52 or the concave grooves 51 and 53 are provided on both the valve body side contact surface 43c of the check valve 43 for introducing the outside air and the valve seat side contact surface 28a of the valve seat 28. May be.

Further, in the above-described embodiment, only one protrusion 50, 52 or concave groove 51, 53 is provided on the valve body side contact surface 43c of the outside air check valve 43 or the valve seat side contact surface 28a of the valve seat 28. Although provided, a plurality of protrusions 50, 52 or concave grooves 51, 53 are provided on the valve body side contact surface 43c of the outside air check valve 43 or the valve seat side contact surface 28a of the valve seat 28. It can also be

Further, in the above-described embodiment, the projections 50, 52 and the concave grooves 51, 53 are provided on the valve body side contact surface 43c of the outside air check valve 43 or the valve seat side contact surface 28a of the valve seat 28. Although the air passage 60 is formed between the valve seat 28 and the outside air check valve 43, the invention is not limited to this, and for example, the valve body side contact surface 43c of the outside air check valve 43 and The air passage 60 may be formed by providing a roughened portion having unevenness such as grain on one or both of the valve seat side contact surfaces 28a of the valve seat 28. In this case, the roughened portion is provided by forming the outside air check valve 43 or the valve seat 28 by using a mold having a roughened portion on the inner surface by, for example, not performing mirror finishing. Alternatively, the surface of the check valve 43 for introducing outside air or the valve seat 28 may be provided by performing blasting or the like as a post-process.

Further, in the above-described embodiment, the outside air introduction port 13 is provided in the mouth portion 11a of the outer layer body 11, but when the squeezed outer layer body 11 is restored to the original shape, the outer layer body 11 and the inner layer body 12 are formed. If the outside air can be introduced between the outer layer body 11 and the outer layer body 11, the outer layer body 11 can be provided at other portions such as the body portion 11b and the bottom portion.

1 Pour-out container 10 Container body 10a Mouth portion 10b Body 11 Outer layer 11a Mouth portion 11b Body 12 Inner layer 12a Storage space 13 Outside air inlet 14 Male screw 20 Pour cap 21 Cap body 21a Top wall 21b Mounting cylinder 22 Female screw 23 spout 24 lid 25 hinge 26 obstruction plug 27 opening 28 valve seat 28a valve seat side abutment surface 30 inner plug 31 engagement wall 32 outflow hole 33 tubular wall 33a reduced diameter portion 34 spherical valve 35 through hole 40 valve Member 41 Annular wall 42 Check valve for contents 42a Valve body 42b Leg portion 43 Check valve for introducing outside air 43a Membrane portion 43b Outer peripheral edge portion 43c Valve body side contact surface 44 Hinge portion 50 Protrusion 51 Concavity groove 52 Protrusion 53 Concavity Groove 60 Air passage P Air passage

Claims (5)

It has a double structure having a squeezeable outer layer body and a volume-reducible inner layer body housed in the outer layer body, and has an outside air introduction port communicating between the outer layer body and the inner layer body. Container body,
A pouring container having a pouring outlet for contents, having a pouring cap attached to the mouth of the container body,
The pouring cap is provided to block communication between the pouring outlet and the inside of the inner layer body, while opening due to a pressure increase inside the inner layer body to communicate the inside of the inner layer body with the pouring outlet. Check valve for contents,
A non-return valve for outside air introduction that abuts against the valve seat to block communication with the outside of the outside air introduction port, and opens by the negative pressure between the outer layer body and the inner layer body to communicate the outside air introduction port with the outside. And a valve,
A dispenser characterized in that a fine air passage is provided between the valve seat and the check valve for introducing outside air, which is in contact with the valve seat. The pouring container according to claim 1, wherein a cross-sectional area of the narrowest part of the air passage is 0.002 mm ² or more and less than 0.02 mm ² . The pouring container according to claim 2, wherein a cross-sectional area of the narrowest part of the air passage is 0.004 mm ² or more and less than 0.01 mm ² . Either the valve body side contact surface of the outside air check valve contacting the valve seat or the valve seat side contact surface of the valve seat contacting the outside air check valve is attached to the valve body side contact surface. The projection which protrudes toward the other one of a contact surface and the said valve seat side contact surface is provided, and the said air passage is provided in both sides of the said projection, The any one of Claims 1-3. Pouring container. Either the valve body side contact surface of the outside air check valve contacting the valve seat or the valve seat side contact surface of the valve seat contacting the outside air check valve is attached to the valve body side contact surface. 4. A groove that is recessed in a direction away from the other of the contact surface and the valve seat side contact surface is provided, and the groove forms the air passage. The dispensing container described in.

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