JP7175728B2 - pouring container - Google Patents

Description

The present invention relates to dispensing containers.

As a container for containing cosmetics such as lotion, food seasonings such as shampoo, rinse, liquid soap, soy sauce, etc., and contents having liquid or fluidity such as medicines, the container is accommodated in the squeezable outer layer body and the outer layer body. It has a double structure container body having a volume-reducing and deformable inner layer, and a pouring cap provided with a spout for contents and attached to the mouth of the container body, and squeezing the body of the container body. A squeeze-type pouring container is known in which a desired amount of content can be poured out from a spout by (pressing) the inner layer body to reduce and deform the volume (see, for example, Patent Document 1). .

In the pouring container, the pouring cap blocks the communication between the pouring port and the inside of the inner layer, and is opened by the pressure increase inside the inner layer due to the squeeze of the barrel to pour out the inside of the inner layer. A content check valve is provided in communication with the outlet. In addition, the container body is provided with an outside air introduction port that communicates between the outer layer body and the inner layer body. A check valve for outside air introduction that blocks communication with the outside of the mouth and opens by the negative pressure generated between the outer layer body and the inner layer body when the squeeze of the body is released to communicate the outside air introduction port with the outside. is provided.

With such a configuration, when the contents are poured out by squeezing the body, the outside air introduction check valve prevents the air between the outer layer and the inner layer from leaking to the outside. The content can be easily and reliably poured out by effectively transmitting the squeeze of the body to the inner layer through the air between the outer layer and the inner layer. On the other hand, when the barrel portion is released from the squeeze after the contents have been poured out, the contents check valve is closed to prevent the outside air from being introduced into the inner layer body from the pouring port, and the outside air introduction check valve is closed. Since the valve is opened and 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 its original shape while the inner layer body is reduced in volume and deformed. As a result, the contents contained in the inner layer can be poured out without being replaced with the outside air, so that the contents remaining inside the inner layer are less likely to come into contact with the air, thereby preventing their deterioration and deterioration. can be suppressed.

JP 2017-100748 A

However, in the conventional pouring container, if the sealing performance of 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 separated from the outside air introduction port. There is a problem that it becomes difficult to introduce the outside air between the In particular, when the outer layer has a relatively low restorability, such as when the trunk is formed in a rectangular, elliptical, or flat cylindrical shape, or when the outer layer is made of a soft material. However, there is a problem that the outside air introduction check valve is closed during restoration of the outer layer body after the squeeze is released, and the outer layer body may not restore its original shape.

An object of the present invention is to solve such problems, and an object of the present invention is to provide a pouring container in which the outer layer body can be reliably restored to its original shape after the contents are poured out. to provide.

The pouring container of the present invention has a double structure having a squeezable outer layer and a volume-reducing and deformable inner layer accommodated in the outer layer. A pouring container comprising: a container body provided with an outside air introduction port communicating with the outside air; and a pouring cap provided with a content pouring port and attached to the mouth of the container body, wherein the pouring cap is provided with a content check valve that blocks communication between the pouring port and the inside of the inner layer, and opens due to an increase in pressure inside the inner layer to communicate the inside of the inner layer with the pouring port; and a valve seat to cut off the communication of the outside air introduction port with the outside, and open 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, wherein a valve-seat-side abutment surface of the valve seat abuts against the outside-air introduction check valve, and a valve-body-side abutment surface abuts against the valve seat of the outside-air introduction check valve. A projection is provided that protrudes toward the valve seat, and the projection provides a minute air passage between the valve seat and the outside air introduction check valve that abuts on the valve seat, and the projection is and a long shape extending across the valve-side contact surface .

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

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

In the pouring container of the present invention, in the above configuration, the valve body side contact surface of the outside air introduction check valve that contacts the valve seat and the valve seat side contact surface of the valve seat that contacts the outside air introduction check valve are provided. Either one of the contact surfaces is provided with a groove that is recessed in a direction away from the other of the valve-side contact surface and the valve-seat-side contact surface, and the groove constitutes the air passage. It is preferable to be

According to the present invention, it is possible to provide a pouring container in which the outer layer body can be reliably restored to its original shape after the contents are poured out.

It is a sectional view showing the important section of the extraction container which is one embodiment of the present invention. 2 is a plan view of the valve member shown in FIG. 1; FIG. FIG. 4 is an enlarged cross-sectional view showing a contact portion between a valve seat and a check valve for introducing outside air; (a) is an enlarged plan view showing a portion provided with a projection of the check valve for introducing outside air, (b) is a cross-sectional view along line AA in FIG. ) is an enlarged cross-sectional view showing the abutting portion between the valve seat and the portion provided with the projection of the check valve for introducing outside air. (a) is a plan view showing an enlarged portion of a check valve for introducing outside air according to a modification where a groove is provided, and (b) is a cross-sectional view taken along line BB in FIG. (c) is an enlarged cross-sectional view showing a contact portion between a valve seat and a portion provided with a groove of the check valve for introducing outside air. (a) is an enlarged cross-sectional view showing a portion of the valve seat provided with a protrusion, (b) is a bottom view of the valve seat shown in FIG. ) is an enlarged cross-sectional view showing a contact portion between a portion of the valve seat provided with a projection and the check valve for introducing outside air. (a) is an enlarged cross-sectional view showing a portion of a valve seat provided with a groove, and (b) is a bottom view of the valve seat shown in FIG. FIG. 1c) is a cross-sectional view showing an enlarged portion of contact between the grooved portion of the valve seat and the check valve for introducing outside air. FIG. 4 is a cross-sectional view showing the essential parts of a pouring container that is another embodiment of the present invention; 9 is a plan view of the valve member shown in FIG. 8; FIG.

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 pouring cap is positioned with respect to the container body (upper side in FIG. 1) is referred to as "upper", and the opposite side is referred to as "lower".

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

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 cylindrical body portion 10b.

The outer layer body 11 constitutes the 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 can be made of a synthetic resin material such as polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), or the like. The trunk portion 11b of the outer layer body 11 is flexible and can be squeezed (pressed). That is, the body portion 11b of the outer layer body 11 can be dented by squeezing, and when the squeezing is released, the trunk portion 11b can restore itself to its original shape from the dented state by its own elastic force.

The inner layer body 12 is made of a synthetic resin material such as ethylene-vinyl alcohol copolymer (EVOH) or polyethylene terephthalate (PET), and is formed into a bag-like shape that is thinner and more flexible than the outer layer body 11. It is accommodated in the outer layer body 11 in a detachably laminated state on the inner surface. The opening of the inner layer body 12 is connected to the open end of the mouth portion 11a of the outer layer body 11, and the interior of the inner layer body 12 serves as a content storage space 12a. 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 can be deformed to reduce its inner volume.

Thus, in this embodiment, the container body 10 is configured as a delaminated 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-extrusion of a synthetic resin material for the outer layer 11 and a synthetic resin for the inner layer 12, which have low compatibility, to form a laminated parison. , may be formed by extrusion blow molding in which blow molding is performed using a mold. The container body 10 is formed by biaxially stretching and blow-molding a synthetic resin double preform in which an inner preform for the inner layer 12 is housed inside an outer preform for the outer layer 11. can also be In this case, in the double preform, both the outer preform for the outer layer body 11 and the inner preform for the inner layer body 12 can be made of polyethylene terephthalate (PET).

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

An outside air introduction port 13 communicating between the outer layer body 11 and the inner layer body 12 is provided at the mouth portion 11 a of the outer layer body 11 . 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 allows outside air to be introduced between the outer layer body 11 and the inner layer body 12 from the outside of the container body 10 .

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

The pouring cap 20 has a cap body 21 made of synthetic resin, for example. The cap main body 21 is formed in a truncated tubular shape having a top wall 21a and a cylindrical mounting cylinder portion 21b integrally connected to the outer peripheral edge of the top wall 21a. The opening 10a is mounted so that the top wall 21a surrounds the outer periphery of the opening 10a and covers the opening end of the opening 10a.

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

A cylindrical spout 23 is integrally provided on the upper surface of the top wall 21a. The pouring port 23 can pour out the contents contained in the container body 10 to the outside. In the present embodiment, the spout 23 is formed in a cylindrical shape that curves outward while gradually increasing in diameter upward from the top wall 21a. Various changes are possible according to the contents contained in the container, the application, and the like. Moreover, the spout 23 is not limited to a tubular shape protruding from the top wall 21a, and may be formed as a hole that penetrates the top wall 21a but does not protrude from the top wall 21a.

A cover body 24 is integrally provided with the pouring cap 20 . The lid body 24 is formed in a truncated cylindrical shape having substantially the same diameter as the mounting cylindrical portion 21b of the pouring cap 20, and is connected to the pouring cap 20 via a hinge 25 at a part of its outer peripheral surface so as to be freely openable and closable. It is A cylindrical blocking plug 26 is integrally provided on the back surface of the lid 24, and when the lid 24 is closed, the blocking plug 26 fits into 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 open end of the mouth portion 10a to cover the open end. A cylindrical engagement wall 31 is integrally formed on the outer peripheral edge of the inner plug 30 and rises upward. ing. Thereby, a predetermined space is provided between the inner plug 30 and the top wall 21a.

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

The pouring cap 20 is provided with a valve member 40 made of an elastic material such as low density polyethylene (LDPE). The valve member 40 has a cylindrical annular wall 41 and integrally includes a content check valve 42 inside the annular wall 41 and an external air introduction check valve 43 integrally outside the annular wall 41 . there is It should be noted that the valve member 40 is not limited to low-density polyethylene, and may be made of other elastic material such as rubber or elastomer.

The annular wall 41 is disposed 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 divided into the flow path portion of the contents inside the annular wall 41 and the inner plug 30 from the annular wall 41 . is also partitioned into a channel portion for outside air (outside air). The spout 23 and the outflow hole 32 are in communication with the channel portion of the contents inside the annular wall 41 respectively.

As shown in FIG. 2, the content check valve 42 includes a disc-shaped valve body 42a 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 blocks the communication between the outlet 23 and the inside of the inner layer body 12 (accommodating space 12a). ing. Further, when the pressure inside the inner layer body 12 increases, the valve body 42a elastically deforms the three leg portions 42b and moves away from the upper surface of the inner plug 30 in accordance with the pressure increase. , the outflow hole 32 can be opened. That is, the content check valve 42 blocks the communication between the outlet 23 and the interior of the inner layer 12 (accommodating space 12 a ), while opening due to the pressure increase inside the inner layer 12 . The inside can be communicated with the spout 23 .

As shown in FIG. 1, the inner plug 30 is provided with a cylindrical wall 33 located on the side opposite to the hinge 25 with respect to the outflow hole 32 and extending toward the accommodation space 12a. there is A reduced diameter portion 33a is provided at the lower end of the cylindrical wall 33, the inner diameter of which decreases downward. A spherical valve (ball valve) 34 made of steel, resin, or the like is arranged inside the cylindrical wall 33 . When the container body 10 is tilted with the tubular spout 23 directed downward, the spherical valve 34 moves inside the tubular wall 33 toward the spout 23 side. After the contents have been poured out, when the container body 10 is returned to the upright position (upright position) so that the tubular outlet 23 faces upward, the spherical valve 34 moves inside the tubular wall 33. It moves downward until it abuts against the diameter-reduced portion 33 a and sucks the content remaining in the spout 23 toward the inside of the cylindrical wall 33 . As a result, it is possible to reduce the amount of liquid remaining inside the spout 23 and prevent the liquid from dripping from the spout 23 . Thus, the spherical valve 34 functions as a suckback mechanism for preventing dripping 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, thereby forming an air flow path between the mouth portion 10a and the mounting cylinder portion 21b. P is provided. This 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 passes through a through hole 35 provided at the connecting portion between the inner plug 30 and the engaging wall 31 to allow air flow. Communicates with road P. A slit forming a part of the air flow path P is provided in the male screw 14 .

As shown in FIGS. 1 and 2, the outside air introduction check valve 43 provided outside the annular wall 41 extends radially outward from the entire circumference of the outer peripheral surface of the annular wall 41 and projects downward. and an outer peripheral edge portion 43b that bends downward from the outer peripheral edge of the film-like portion 43a. The upper surface of the is an annular valve body side contact surface 43c.

As shown in FIGS. 1 and 3, the lower surface of the top wall 21a of the cap main body 21 serves as a valve seat 28, and the check valve 43 for introducing outside air has a valve body side contact surface 43c. The opening 27 is closed by contacting the contact surface 28a over the entire circumference. That is, the outside air introduction check valve 43 abuts against the valve seat side contact surface 28 a of the valve seat 28 to reach the outside air introduction port 13 from the opening 27 through the through hole 35 and the air flow path P. By blocking the path of the air, communication with the outside of the outside air introduction port 13 is blocked. On the other hand, in the outside air introduction check valve 43, when a negative pressure is generated between the outer layer body 11 and the inner layer body 12, the valve body side contact surface 43c is moved to the valve seat side contact surface of the valve seat 28 by the negative pressure. The film-like portion 43a is elastically deformed and opened so as to separate from 28a. When the outside air introduction check valve 43 is opened, the outside air introduction port 13 communicates with the outside of the extraction container 1 via the opening 27 , the through hole 35 and the air flow path P. Note that when the negative pressure between the outer layer body 11 and the inner layer body 12 decreases, the outside air introduction check valve 43 restores its original shape by its own elastic force, so that the valve seat side contact surface 28a is fully covered. It abuts along the circumference and closes the opening 27 .

In the pouring container 1 having the above configuration, when the body portion 10b of the container body 10 is squeezed (pressed) to reduce and deform the inner layer 12, the internal pressure of the inner layer 12 rises and the non-return for the contents is obtained. The valve 42 is opened, and the contents stored in the storage space 12a of the inner layer body 12 can be poured out through the outflow hole 32 and the pouring port 23 to the outside. When squeezing the body portion 10b to pour out the contents, the check valve 43 for introducing the outside air blocks communication with the outside of the outside air introduction port 13, and the space between the outer layer body 11 and the inner layer body 12 is blocked. Since the air is prevented from leaking outside through the outside air inlet 13, the squeeze of the trunk portion 10b is effectively transmitted to the inner layer 12 via the air between the outer layer 11 and the inner layer 12. In this way, the contents can be easily and reliably poured out.

On the other hand, in the pouring container 1 having the above configuration, when the squeezing of the body portion 10b is released after pouring out the contents, the contents check valve 42 is closed and the contents flow into the inner layer body 12 from the pouring port 23. The introduction of outside air is blocked, and the outside air introduction check valve 43 is opened to introduce outside air between the outer layer body 11 and the inner layer body 12 through the outside air introduction port 13 . Therefore, only the outer layer 11 can be restored to its original shape while the inner layer 12 is reduced in volume and deformed. As a result, 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, a protrusion 50 is provided integrally with the valve body side contact surface 43c of the check valve 43 for introducing outside air. The protrusion has a spherical outer surface and protrudes 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, the valve seat 28 (valve seat side contact surface 28a) and the valve seat 28 (valve seat side contact surface 28a) are formed as shown in FIG. 28a), a pair of fine air passages 60 are provided on both sides of the projection 50 between the external air introduction check valve 43 (valve body side abutting surface 43c).

The air passage 60 communicates with the opening 27 side and the outside air introduction port 13 side when the outside air introduction check valve 43 is closed. As a result, when the outside air introduction check valve 43 is closed, the outside air introduction port is opened through the air passage 60 without completely blocking the communication between the outside air introduction port 13 and the outside by the outside air introduction check valve 43 . A small amount of outside air can be introduced at 13 .

Therefore, when the body portion 10b is squeezed to pour out the contents and then the squeezing is released and the outer layer body 11 is restored to its original shape, the outside air introduction check valve 43 is closed while the outer layer body 11 is being restored. Even if the outer layer body 11 is lost, the outside air is slightly introduced into the outside air introduction port 13 through the pair of air passages 60, so that the outer layer body 11 can be reliably restored to its original shape. Also, the outer layer body 11 can be quickly restored to its original shape. In particular, when the trunk portion 10b is formed in a square tube shape, an elliptical tube shape, or a flat tube shape, or when the outer layer body 11 is formed of a soft material, the restorability of the outer layer body 11 is relatively low. is low, the above effect can be obtained remarkably.

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 outside air, the body portion 10b is squeezed to remove the contents. After pouring out the object, when the squeeze is released and the outer layer body 11 restores its original shape, the outside air is easily introduced between the outer layer body 11 and the inner layer body 12 from the outside air introduction port 13, and the outer layer is The body 11 can be reliably restored to its original shape.

In the present embodiment, a fine air passage 60 is provided between the valve seat 28 and the outside air introduction check valve 43 by providing a projection 50 on the valve body side contact surface 43c of the outside air introduction check valve 43. However, not limited to this, as shown in FIG. can be The concave groove 51 is configured as a notch groove obtained by notching a portion of the valve-side contact surface 43c in the radial direction.

In this configuration as well, when the body portion 10b is squeezed to pour out the contents and then the squeezing is released and the outer layer body 11 is restored to its original shape, the outside air introduction check valve is opened during the restoration of the outer layer body 11. 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, so that the outer layer body 11 can be reliably restored to its original shape. can be restored.

In this embodiment, the protrusion 50 or the groove 51 are provided on the valve body side contact surface 43c of the outside air introduction check valve 43. It can also be configured to be provided on the contact surface 28a.

For example, as shown in FIG. 6, a long protrusion extending along the radial direction of the external air introduction check valve 43 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. By providing 52 , a pair of fine air passages 60 may be provided on both sides of the projection 52 between the valve seat 28 and the outside air introduction check valve 43 .

In this configuration as well, when the body portion 10b is squeezed to pour out the contents and then the squeezing is released and the outer layer body 11 is restored to its original shape, the outside air introduction check valve is opened during the restoration of the outer layer body 11. 43 is closed, the external air is slightly introduced into the external air introduction port 13 through the pair of air passages 60 formed on both sides of the projection 52, so that the outer layer body 11 is returned to its original shape. can be reliably restored.

Further, as shown in FIG. 7, a long concave portion extending along the radial direction of the outside air introduction check valve 43 is formed 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 to function as the air passage 60 .

In this configuration as well, when the body portion 10b is squeezed to pour out the contents and then the squeezing is released and the outer layer body 11 is restored to its original shape, the outside air introduction check valve is opened during the restoration of the outer layer body 11. 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, so that the outer layer body 11 can be reliably restored to its original shape. can be restored.

Here, the air passage 60 provided between the valve seat 28 and the outside air introduction check valve 43 has a cross-sectional area perpendicular to the flow path direction at its narrowest portion, which squeezes the body portion 10b to squeeze the contents. Even if the air between the outer layer body 11 and the inner layer body 12 passes through the air passage 60 and is discharged to the outside from the opening 27 at the time of pouring out the contents, when the body part 10b is squeezed, the contents are poured out through the outlet. It is formed to be large enough to allow moderate pouring from 23 . When a plurality of air passages 60 are provided between the valve seat 28 and the outside air introduction check valve 43, the total cross section obtained by summing the cross sectional areas perpendicular to the flow direction at the narrowest portion of each air passage 60 Each air passage 60 is formed so that the area has the above size. As a result, the outer layer body 11 can be reliably restored to its original shape after the contents are poured out without deteriorating the usability or operability when the contents are poured out by squeezing the body part 10b. be able to.

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

For example, when the diameter at the center in the radial direction of the valve-side contact surface 43c of the outside-air introduction check valve 43 is 17.2 mm, the projections 50 and 52 from the valve-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 and 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 at the narrowest portion of the air passage 60 can be within the above numerical range.

FIG. 8 is a cross-sectional view showing essential parts of a pouring 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. 8 and 9, members corresponding to the members described above are denoted by the same reference numerals.

The outside air introduction check valve 43 is not limited to the configuration shown in FIG. Alternatively, it may be integrally connected to a portion of the outer peripheral surface of the annular wall 41 by means of a hinge portion 44 . In this case, the valve seat 28 is formed in a circle having a diameter corresponding to the outside air introduction check valve 43 , and the annular valve seat side contact surface 28 a of the valve seat 28 is formed on the outer peripheral edge portion of the outside air introduction check valve 43 . Communication between the external air introduction port and the outside is cut off by contact with the valve body side contact surface 43c provided on the upper surface. On the other hand, when the pressure between the outer layer body 11 and the inner layer body 12 becomes negative, the outside air introduction check valve 43 is pulled downward by the negative pressure, and moves away from the valve seat 28 with the hinge portion 44 as a fulcrum. It rotates and opens to communicate the external air introduction port to the outside.

In the pouring container 1 shown in FIG. 8 as well, the outside air introduction check valve 43 shown in FIG. After squeezing the body portion 10b to pour out the contents, as in the case where the outer layer body 11 is restored to its original shape after the squeezing is released, the non-return for introducing the outside air is provided during the restoration of the outer layer body 11. Even when the valve 43 is closed, the outside air is slightly introduced into the outside air introduction port 13 through the air passage 60, so that the outer layer body 11 can be reliably restored to its original shape. effect can be obtained.

In the pouring container 1 shown in FIG. 8 as well, the valve-side contact surface 43c may have a groove 51 instead of the projection 50, or the valve-side contact surface 43c may be provided with the projection 50 or the groove 51. , the valve-seat-side contact surface 28a may be provided with a projection 52 or a recessed groove 53. As shown in FIG.

It goes without saying that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

For example, in the above-described embodiment, the protrusions 50, 52 or the grooves 51, 53 are formed on either the valve body side contact surface 43c of the outside air introduction check valve 43 or the valve seat side contact surface 28a of the valve seat 28. However, projections 50, 52 or grooves 51, 53 are provided on both the valve body side contact surface 43c of the outside air introduction check valve 43 and the valve seat side contact surface 28a of the valve seat 28. may

In the above-described embodiment, only one projection 50, 52 or groove 51, 53 is provided on the valve-side contact surface 43c of the outside-air introduction check valve 43 or the valve-seat-side contact surface 28a of the valve seat 28. However, a plurality of protrusions 50, 52 or grooves 51, 53 are provided on the valve body side contact surface 43c of the outside air introduction check valve 43 or the valve seat side contact surface 28a of the valve seat 28. can also be

Furthermore, in the above-described embodiment, the protrusions 50, 52 or the grooves 51, 53 are provided on the valve body side contact surface 43c of the outside air introduction check valve 43 or the valve seat side contact surface 28a of the valve seat 28. , the air passage 60 is formed between the valve seat 28 and the outside air introduction check valve 43, but not limited to this, for example, the valve body side contact surface 43c of the outside air introduction check valve 43 and the The air passage 60 may be formed by providing a surface roughening portion having unevenness such as embossing on one or both of the valve seat side contact surfaces 28 a of the valve seat 28 . In this case, the roughened portion is provided by molding the external air introduction check valve 43 or the valve seat 28 using a mold having a roughened portion on the inner surface, for example, without mirror finishing. Alternatively, the surfaces of the outside air introduction check valve 43 and the valve seat 28 may be provided by performing blasting or the like as a post-process.

Furthermore, 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 restores its original shape, the outer layer body 11 and the inner layer body 12 are separated from each other. If it is possible to introduce outside air between and, for example, it can be provided in other parts such as the body part 11b and the bottom part of the outer layer body 11.

1 Extraction container 10 Container body 10a Mouth part 10b Body part 11 Outer layer body 11a Mouth part 11b Body part 12 Inner layer body 12a Accommodating space 13 Outside air introduction port 14 Male thread 20 Extraction cap 21 Cap body 21a Top wall 21b Mounting cylinder part 22 Female thread 23 Spout 24 Lid 25 Hinge 26 Obstruction plug 27 Opening 28 Valve seat 28a Valve seat side contact surface 30 Intermediate plug 31 Engagement wall 32 Outflow hole 33 Cylindrical wall 33a Reduced diameter portion 34 Spherical valve 35 Through hole 40 Valve Member 41 Annular wall 42 Content check valve 42a Valve main body 42b Leg portion 43 Outside air introduction check valve 43a Membrane portion 43b Outer peripheral edge portion 43c Valve body side contact surface 44 Hinge portion 50 Projection 51 Groove 52 Projection 53 Concave Groove 60 air passage P air flow path

Claims (3)

It has a double structure having a squeezable outer layer body and a volume-reducing and deformable inner layer body housed in the outer layer body, and is provided with an outside air inlet communicating between the outer layer body and the inner layer body. a container body;
A pouring container comprising a pouring port for contents and a pouring cap attached to the mouth of the container body,
Provided in the pouring cap, it cuts off the communication between the pouring port and the inside of the inner layer, and opens when the pressure inside the inner layer rises to allow the inside of the inner layer to communicate with the pouring port. a content check valve;
A non-return for outside air introduction that abuts against the valve seat to cut off the communication of the outside air introduction port with the outside, and is opened by the negative pressure between the outer layer body and the inner layer body to communicate the outside air introduction port with the outside. having a valve and
The valve seat side contact surface of the valve seat that contacts the outside air introduction check valve is provided with a projection protruding toward the valve body side contact surface of the outside air introduction check valve that contacts the valve seat. be
A fine air passage is provided by the projection between the valve seat and the outside air introduction check valve that abuts on the valve seat ,
A pouring container , wherein the protrusion has an elongated shape extending so as to straddle the contact surface on the valve body side . 2. The pouring container according to claim 1, wherein the narrowest portion of the air passage has a cross-sectional area of 0.002 mm<2> or more and less than 0.02 mm<2>. 3. The pouring container according to claim 2, wherein the narrowest portion of the air passage has a cross-sectional area of 0.004 mm<2> or more and less than 0.01 mm<2>.

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