JP7218062B2 - double container cap - Google Patents

Description

TECHNICAL FIELD The present invention relates to a double-container cap that is attached to the mouth of a double-container to allow contents to be poured out.

Conventionally, it has a configuration in which a discharge cap having a discharge port is attached to the mouth of a container body that stores contents, and the body of the container body is pressed (squeezed) to store contents in the container body. 2. Description of the Related Art A discharge container is known that can discharge a desired amount of a substance from a discharge port.

In addition, as such a discharge container, the container body is configured as a double container in which the inner layer body that can be reduced and deformed is accommodated inside the outer layer body, and the contents are allowed to be discharged from the container body through the pouring hole. On the other hand, there is known a configuration in which a check valve having a slit valve structure is provided to prevent inflow of the contents and outside air into the container body.

In the discharge container configured as described above, after the body of the container body is pressed to discharge the contents, when the pressure on the body is released, the contents or contents are discharged from the pouring hole toward the container body by the check valve. Inflow of outside air is blocked, and outside air is introduced between the outer layer body and the inner layer body through an intake port (outside air introduction hole) provided in the discharge cap, thereby returning the outer layer body to its original state while reducing and deforming the inner layer body. Since the shape can be restored, the content can be discharged without being replaced with the outside air, thereby making it difficult for the content remaining inside the container body to come into contact with the air, thereby suppressing deterioration and alteration.

Here, when the discharge container as described above is used for containing a content containing a small amount of solid matter or a content containing ingredients, the slit constituting the slit valve is filled with solid matter contained in the content. There is a risk that the slit valve will not be closed due to being caught. If the slit remains open after ejection, there is a risk that outside air will enter the space containing the contents, leading to deterioration or deterioration of the contents.

In order to solve such problems, in Patent Document 1, two check valves consisting of a first check valve and a second check valve are provided in the flow path of the contents from the inside of the container body to the pouring hole. Disclosed is a discharge container provided with a content storage space between two check valves in which a portion of the residual content is stored after the content has been discharged.

According to such a discharge container, a part of the content remaining after the content is discharged is stored in the content storage space and covers the slit of the slit valve, thereby forming a so-called liquid seal and allowing the content to flow into the inner layer body. Intrusion of outside air can be suppressed.

JP 2019-43555 A

By the way, in the above discharge container, since the first check valve having the slit valve is disposed between the lower cap and the upper cap that constitute the cap main body, the lower cap and the upper cap may be separated during assembly. A first check valve had to be placed between

Further, in the above discharge container, the first check valve includes a slit valve having a slit and a tubular shape extending upward from the outer peripheral edge of the slit valve and having an upper end forming a valve seat of the second check valve. which extends the full height of the content-retaining space from the slit valve to the second check valve. Therefore, the first check valve becomes a relatively large member, and a relatively large amount of soft resin such as silicone rubber or elastomer is used to form the first check valve.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a double container cap that facilitates assembly work of the check valve to the cap body and that can reduce the amount of resin by miniaturizing the check valve made of a soft material. and

A double container cap of the present invention is a double container cap to be attached to a double container body comprising an inner layer body for containing contents and a squeezable outer layer body for containing the inner layer body,
a cap body having a pouring hole for pouring out the content from the inner layer body and attached to the mouth of the double container body;
Provided in the flow channel between the inner layer body and the pouring hole, it blocks the outflow of the contents from the inner layer body in a closed state, and is opened by a pressure rise in the inner layer body caused by squeezing the outer layer body. a first check valve made of a soft material and allowing the contents from the inner layer body to pass therethrough;
Provided in the flow path between the first check valve and the pouring hole, it blocks the outflow of the content from the inner layer in a closed state, and increases the pressure in the inner layer by squeezing the outer layer. a second check valve that opens together with the first check valve and allows the contents from the inner layer body to pass through,
A content storage space is provided between the first check valve and the second check valve, in which a part of the remaining content is stored after the content is discharged,
The cap body includes a lower cap attached to the mouth, and an upper cap having the pouring hole and positioned above the lower cap,
The second check valve is arranged between the lower cap and the upper cap,
The first check valve has a slit valve,
The first check valve is attached from below to the lower end of an annular valve fixing portion provided on the lower cap.

In addition, in the double container cap of the present invention, the valve fixing portion has an outer cylinder and an inner cylinder that are arranged concentrically,
Preferably, the first check valve has an annular fitting wall fitted and held between the outer cylinder and the inner cylinder.

Further, in the double container cap of the present invention, it is preferable that the inner cylinder projects downward from the outer cylinder.

Further, in the double container cap of the present invention, it is preferable that the inner peripheral surface of the outer cylinder is provided with a claw portion that engages with the outer peripheral surface of the fitting wall.

Further, in the double container cap of the present invention, the claw portion extends obliquely upward from the base end portion connected to the inner peripheral surface of the outer cylinder toward the tip end portion, and the fitting wall is the It is preferable that the distal end portion is elastically deformed radially outward when it is inserted between the outer cylinder and the inner cylinder.

Further, in the double container cap of the present invention, the second check valve has a valve body whose outer peripheral edge is supported by an elastic arm,
It is preferable that the inner cylinder is provided with a valve seat on which the valve body is seated when the second check valve is closed.

Further, in the double container cap of the present invention, the second check valve is integrally provided on the inner peripheral surface of the annular wall surrounding the flow path of the contents from the inner layer body to the pouring hole,
A lower portion of the annular wall is preferably held between the outer cylinder and the inner cylinder.

In the double container cap of the present invention, the cap body has an outside air introduction hole for introducing outside air into the space between the outer layer and the inner layer as the outer layer is restored by releasing the squeeze. is provided,
It is preferable that an outside air introduction valve for opening and closing the outside air introduction hole is provided integrally with the outer peripheral surface of the annular wall.

According to the present invention, it is possible to provide a double container cap that facilitates the work of assembling the check valve with respect to the cap main body and that can reduce the amount of soft resin that forms the check valve.

1 is a cross-sectional view of a double container cap according to an embodiment of the present invention; FIG. 2 is a partially enlarged cross-sectional view of the double container cap of FIG. 1. FIG. FIG. 4 is a bottom view showing a first check valve (slit valve) and a valve fixing portion that constitute the double container cap according to one embodiment of the present invention.

Hereinafter, the present invention will be described more specifically with reference to the drawings.

FIG. 1 shows a state in which a double container cap 1, which is an embodiment of the present invention, is attached to a compatible double container body 2. As shown in FIG. The double container cap 1 has a cap body 10 , a soft valve member 30 (first check valve), a coupling valve 40 and a lid body 50 .

The double container main body 2 is composed of an inner layer body 3 and an outer layer body 4 . The cap main body 10 is composed of a lower cap 10a having an outer peripheral wall 11 fitted to the mouth peripheral wall 4a of the double container main body 2, and an upper cap 10b having a later-described pouring hole 14a. A lid body 50 is integrally provided (molded integrally) with the upper end portion of the peripheral wall 17 of the upper cap 10b via a hinge 53h. In the present specification, claims, abstract and drawings, the side where the lid 50 is located with respect to the double container body 2 is the upper side (upper side in FIG. 1), and the opposite side (the lid 50 The side on which the double container main body 2 is positioned is defined as the lower side (lower side in FIG. 1).

First, the double container body 2 will be described. In this embodiment, the double container main body 2 is formed by extruding and blow-molding a parison formed by laminating the synthetic resin material of the inner layer 3 and the synthetic resin material of the outer layer 4 to form a delaminated container. shaping. Ethylene-vinyl alcohol copolymer resin (EVOH) or nylon is used as the material of the inner layer 3 that constitutes the double container main body 2 . In addition, low-density polyethylene (LDPE), high-density polyethylene resin (HDPE), or polypropylene (PP) is used as the material of the outer layer body 4. In particular, when LDPE is used, high squeezability can be imparted. can. However, the invention is not limited to this embodiment, and the delamination container may be formed, for example, by subjecting a test tube-shaped preform to biaxial stretch blow molding. In that case, for example, polypropylene (PP) can be used as the material of the inner layer 3 and polyethylene terephthalate (PET) can be used as the material of the outer layer 4 . Other resins having low compatibility with each other can be used as materials for the inner layer body 3 and the outer layer body 4, and the method for forming the delaminated container is not particularly limited. Further, the double container main body 2 may be one in which the outer layer body 4 and the inner layer body 3 are individually formed and assembled instead of being a delaminated container. Although not shown, one or a plurality of adhesive strips are provided between the inner layer body 3 and the outer layer body 4 to extend vertically and partially join the inner layer body 3 and the outer layer body 4. may be provided.

The inner layer body 3 is formed so as to be able to reduce and deform its volume, and in this embodiment, it is obtained by separating the double container main body 2 formed in a laminated state from the outer layer body 4 . . The inner layer body 3 has an accommodation space S inside which contents are accommodated, and an upper opening 3a connected to the accommodation space S. As shown in FIG.

The outer layer body 4 is formed by connecting a cylindrical opening peripheral wall 4a (mouth), a body (not shown) having reversible flexibility, and a bottom (not shown) closing the lower end of the body. A male screw portion 4b is provided on the outer peripheral surface of the mouth peripheral wall 4a. In addition, the mouth peripheral wall 4a is provided with a through hole 4c for taking in air between itself and the inner layer body 3. Further, the outer peripheral surface of the mouth peripheral wall 4a is vertically threaded with a male threaded portion 4b. A missing groove portion 4d is provided.

Next, the cap main body 10 constituting the double container cap 1 will be described. As described above, the cap body 10 is composed of the lower cap 10a attached to the mouth peripheral wall 4a and the upper cap 10b having the pouring hole 14a and positioned above the lower cap 10a.

The lower cap 10a has an outer peripheral wall 11 surrounding the mouth peripheral wall 4a, and the inner peripheral surface of the outer peripheral wall 11 is formed with a female threaded portion 12 corresponding to the male threaded portion 4b of the mouth peripheral wall 4a. A fitting cylinder portion 11a formed on the upper portion of the outer peripheral wall 11 and having a smaller outer diameter (thinner thickness) than the outer peripheral wall 11 is undercut-engaged with a peripheral wall 17 of an upper cap 10b, which will be described later. A protrusion 11b is provided for this purpose.

A partition wall 21 is formed radially inward from the inner peripheral surface of the outer peripheral wall 11 to cover the upper opening 3a of the inner layer body 3 . The partition wall 21 is arranged between the pouring hole 14a and the inner layer body 3, and is in airtight contact with the upper opening 3a of the double container body 2 to block the upper opening 3a. A valve fixing portion 23 for mounting a slit valve 31 (to be described later) is integrally provided on the radially inner side (central side) of the partition wall 21 . The partition wall 21 and the valve fixing portion 23 will be described in detail later.

Next, the upper cap 10b that constitutes the cap main body 10 will be described. The upper cap 10b has a peripheral wall 17 that fits into the fitting cylindrical portion 11a of the lower cap 10a, and a top wall 13 that is integrally connected to the upper end of the peripheral wall 17. As shown in FIG. A pouring tube 14 is provided in the center of the upper surface of the top wall 13, and a pouring hole 14a for pouring out the contents is formed in the inner peripheral surface of the pouring tube 14. As shown in FIG. When the double container cap 1 is not in use, the pouring hole 14a is closed by the removing portion 19 connected to the upper cap 10b (cap body 10) via the weakened portion 19d, as shown in FIG. there is A knob portion 19b (pull ring) is integrally provided on the upper surface of the removal portion 19 for pulling the removal portion 19 upward to tear off the removal portion 19 from the upper cap 10b. In addition, the upper cap 10b may not have the configuration of the removing portion 19 that closes the pouring hole 14a in the unused state.

A pair of upper fitting walls 15 arranged concentrically are provided on the lower surface of the top wall 13 . Further, outside the upper fitting wall 15 in the radial direction, an outside air introduction hole 16 penetrating through the top wall 13 is provided. In this embodiment, outside air introduction holes 16 are provided at a plurality of locations in the circumferential direction. The lower end of the outer peripheral wall 11 is in airtight contact with the mouth peripheral wall 4a, and between the mouth peripheral wall 4a and the outer peripheral wall 11, an air passage T leading to the through hole 4c is provided.

In the present embodiment, the groove portion 4d formed by notching the male screw portion 4b in the vertical direction is used as the air passage T, but the present invention is not limited to this aspect. The gap between the male threaded portion 4b and the female threaded portion 12 may be used as the air passage T without providing the groove portion 4d.

Further, in this embodiment, the outside air introduction hole 16 is provided in the top wall 13 of the cap body 10 and the through hole 4c is provided in the mouth peripheral wall 4a to introduce the outside air into the space between the outer layer body 4 and the inner layer body 3. However, it is not limited to this aspect. For example, outside air may be introduced into the space between the outer layer body 4 and the inner layer body 3 through slits in the pinch-off portion of the bottom of the double container body 2 .

The lower cap 10a is formed with the partition wall 21 covering the upper opening 3a of the inner layer body 3 as described above. In this embodiment, the partition wall 21 is integrally formed with the outer peripheral wall 11 of the lower cap 10a, and the inner peripheral edge portion of the partition wall 21 is integrally provided with an annular valve fixing portion 23 . That is, the valve fixing portion 23 is formed integrally with the outer peripheral wall 11 of the lower cap 10a. The inside of the valve fixing portion 23 serves as a flow path for the contents, and also constitutes a contents storage space L in which a part of the remaining contents is stored after the contents have been discharged.

2 is a partially enlarged view of FIG. 1, and FIG. 3 is a bottom view of the valve fixing portion 23 as seen from below. As shown in FIGS. 2 and 3, the valve fixing portion 23 has a cylindrical outer cylinder 23a and an inner cylinder 23b that are concentrically arranged. The outer cylinder 23 a extends downward from the inner peripheral edge of the partition wall 21 . The outer cylinder 23a is in close contact with the inner peripheral surface of the inner layer 3 inside the opening peripheral wall 4a to seal the upper opening 3a.

A pawl portion 24 that engages with the outer peripheral surface of the fitting wall 32c of the soft valve member 30 is provided on the inner peripheral surface of the outer cylinder 23a. The valve fixing portion 23 has a connecting portion 23c that connects the outer cylinder 23a and the inner cylinder 23b. and below an annular wall 41 of a coupling valve 40, which will be described later.

The claw portion 24 of this example is provided so as to protrude radially inward from the lower end portion of the outer cylinder 23a. Further, as shown in FIG. 3, in this example, the four claw portions 24 are evenly arranged at intervals of 90° along the circumferential direction of the outer cylinder 23a. Further, the connecting portion 23c of this example is provided in a circumferential region excluding the circumferential region where the claw portion 24 is provided in plan view shown in FIG.

The claw portion 24 extends obliquely upward from a base end portion 24a connected to the inner peripheral surface of the outer cylinder 23a toward a radially inner tip portion 24b. When the soft valve member 30 is attached to the lower end of the valve fixing portion 23 by inserting the fitting wall 32c from below between the outer cylinder 23a and the inner cylinder 23b, the tip portion 24b of the claw portion 24 has a radial It is configured to temporarily elastically deform outward in the direction (toward the inner peripheral surface of the outer cylinder 23a). The temporarily elastically deformed claw portion 24 returns to its original shape due to a restoring force when the fitting wall 32c is inserted to a predetermined position (the position shown in FIGS. 1 and 2).

The inner cylinder 23b is arranged radially inward of the outer cylinder 23a with a space therebetween. In addition, the inner cylinder 23b protrudes downward from the outer cylinder 23a. That is, the lower end of the inner cylinder 23b is positioned below the lower end of the outer cylinder 23a. An annular inward flange 25 extending radially inward is provided on the upper portion of the inner cylinder 23 b , and an annular valve seat 26 extending upward is provided on the inner peripheral edge of the inward flange 25 .

The second check valve 43, which will be described later, is closed when the valve element 43a elastically supported by the elastic arm 43b is seated on the upper surface of the valve seat 26. As shown in FIG. The inner peripheral surface of the valve seat 26 constitutes a communication port 26a that communicates the inside of the inner layer body 3 with the pouring hole 14a. The inner side of the inner cylinder 23b serves as a flow path for the contents, and also constitutes a contents storage space L. As shown in FIG. The content storage space L is defined by the inner cylinder 23 b including the inward flange 25 and the valve seat 26 , the soft valve member 30 and the second check valve 43 .

In addition, at least one communication hole 27 for communicating the ventilation path T and the outside air introduction hole 16 is provided in the outer peripheral edge portion of the partition wall 21 (the connection portion with the outer peripheral wall 11). Although only one communication hole 27 is illustrated in the example of FIG. 1, the present invention is not limited to this, and two or more communication holes 27 may be provided, and their positions are not particularly limited.

The soft valve member 30 is made of an elastically deformable soft material such as silicone rubber or elastomer. The soft valve member 30 (first check valve) includes a slit valve 31 having a cross-shaped slit in the center and a convex dome shape, and a base portion provided on the outer peripheral edge of the slit valve 31. 32. The base portion 32 includes an inner peripheral wall 32a extending downward from the outer peripheral edge of the slit valve 31, an annular lower wall 32b extending radially outward from the lower end of the inner peripheral wall 32a, and an annular lower wall 32b extending upward from the outer peripheral edge of the lower wall 32b. and an extending fitting wall 32c.

The slit valve 31 is arranged so as to block the lower end opening of the inner cylinder 23b, and the outer peripheral surface of the inner peripheral wall 32a is in contact with the inner peripheral surface of the lower part of the inner cylinder 23b. The fitting wall 32c is fitted and held between the outer cylinder 23a and the inner cylinder 23b.

An engaged portion 32d with which the claw portion 24 of the outer cylinder 23a engages is provided on the outer peripheral surface of the fitting wall 32c. An inclined surface 32e is formed on the outer peripheral side of the upper end portion of the fitting wall 32c. By providing such an inclined surface 32e, the fitting wall 32c can be easily inserted between the outer cylinder 23a and the inner cylinder 23b from below, and the soft valve member 30 can be easily attached to the valve fixing portion 23. In addition, although the engaged portion 32d of the present example is configured as a concave portion into which the claw portion 24 is inserted, it is not limited to this, and may be configured as a convex portion with which the claw portion 24 is engaged from below.

A second check valve 43 is provided between the pouring hole 14 a and the soft valve member 30 . The second check valve 43 is arranged between the lower cap 10a and the upper cap 10b.

The second check valve 43 is made of a resin material such as low density polyethylene (LDPE). The second check valve 43 is provided radially inside the cylindrical annular wall 41 as part of the coupling valve 40, as shown in FIG. The second check valve 43 is a so-called three-point valve having a structure in which a disk-shaped valve body 43a is supported at three points on the outer peripheral edge thereof by elastic arms 43b. Then, the second check valve 43 is closed by the contact of the valve body 43a with the upper surface of the valve seat 26. As shown in FIG. A member such as a protrusion may be provided on the upper surface of the valve body 43a to restrict upward displacement of the valve body 43a when the lid body 50 is closed.

When the pressure inside the inner layer body 3 is increased by squeezing the outer layer body 4 , first, the slit valve 31 of the soft valve member 30 is elastically deformed upward to open the slit, and the soft valve member 30 and the second check valve 43 are separated. The pressure in the content storage space L between increases. Due to this pressure, the valve body 43a is lifted upward in FIG. 1 against the elastic force of the elastic arm 43b, and is separated from the valve seat 26, thereby opening the second check valve 43. As shown in FIG. When the squeezing of the outer layer body 4 is released, the pressure inside the inner layer body 3 decreases and the slit valve 31 closes. Further, as the pressure in the inner layer body 3 decreases, the pressure in the content storage space L also decreases. The stop valve 43 is closed.

The contents storage space L shown in FIG. 1 provided between the soft valve member 30 and the second check valve 43 serves as a flow path for the contents when the contents are discharged, and also serves as a flow path for the contents when the contents are discharged. A part of the remaining content is stored in the content storage space L to cover and seal the slit valve 31 of the soft valve member 30 . In other words, the content stored in the content storage space L constitutes a so-called liquid seal, which can suppress outside air from entering the inner layer body 3 .

In the present embodiment, the slit valve 31 has a dome shape with an upwardly convex shape, but is not limited to this aspect. good too. In addition, the slit formed in the slit valve 31 may have a shape other than a cross shape, for example, a curved shape, and the number of slits may be one (I shape), three (Y shape), or a plurality of five or more. It may have a shape consisting of radial slits.

Further, in the present embodiment, the valve element 43a that constitutes the second check valve 43 is made of a disk-shaped member, but it is not limited to this aspect, and a member having a rectangular shape or the like may be used. Also, the second check valve 43 does not necessarily have to be a three-point valve. Various valves that are opened by positive pressure in the inner layer 3 can be used, such as valves and four-point valves.

An outside air introduction valve 45 is provided on the radially outer side of the annular wall 41 as shown in FIG. The outside air introduction valve 45 is formed radially outward of the annular wall 41 to form an annular thin intake valve element 45a. The intake valve body 45a has an inner peripheral edge connected to the outer peripheral surface of the annular wall 41 and an outer peripheral edge seated on the lower end of the inner ring 18 that hangs down from the lower surface of the top wall 13 of the cap body 10, thereby introducing outside air. The hole 16 is closed.

In this embodiment, the second check valve 43 and the outside air introduction valve 45 are configured to be integrated with the annular wall 41, but the configuration is not limited to this. The introduction valve 45 may be provided separately. Also, the second check valve 43 and the outside air introduction valve 45 may be fixed to something other than the annular wall 41 .

In this embodiment, when the second check valve 43 is attached to the cap main body 10 as shown in FIG. Fitted and retained. The annular wall 41 is arranged above the connecting portion 23c. The upper portion of the annular wall 41 is fitted and held by the upper fitting wall 15 . As a result, as shown in FIG. 1, an inner space K1 is defined radially inwardly of the annular wall 41 to form a channel for the contents by communicating the communication port 26a and the pouring hole 14a. Outside the wall 41 in the radial direction, an outer space K<b>2 is defined to form an air flow path by connecting the outside air introduction hole 16 and the communication hole 27 .

As shown in FIG. 1, the lid 50 is connected to the peripheral wall 17 of the upper cap 10b via a hinge 53h, and can cover the pouring hole 14a and the outside air introduction hole 16. As shown in FIG. More specifically, the lid body 50 includes a flat top wall 52 and a lid body peripheral wall 53 that is connected to the outer peripheral edge of the top wall 52 and whose outer peripheral surface continues to the peripheral wall 17 . On the inner peripheral surface of the lower portion of the lid body peripheral wall 53, there is provided an engaging convex portion 53b that undercuts and engages with the projecting portion 13a that extends upward and radially outward from the upper surface of the top wall 13 of the upper cap 10b. . A cylindrical sealing tube 54 is provided on the lower surface of the upper wall 52 to enter the pouring tube 14 and seal the pouring hole 14a when the lid 50 is closed. A grip portion 53a is formed at a circumferential position facing the hinge 53h on the lid peripheral wall 53, as shown in FIG.

To discharge the contents from the double container cap 1 configured as described above, the lid body 50 is opened by rotating it around the hinge 53h while gripping the grip portion 53a from the state shown in FIG. Then, by pulling upward the knob portion 19b shown in FIG. 1, the weakened portion 19d formed as a thin portion is torn off, and the removal portion 19 is removed from the upper cap 10b. As a result, the pouring hole 14a is opened and the content can be discharged. In this state, the double container main body 2 is tilted forward from the upright posture to a tilted posture, and the body portion of the outer layer body 4 is pressed (squeezed). Thereby, the inside of the inner layer body 3 is pressurized through the air between the inner layer body 3 and the outer layer body 4 or directly. When the body of the outer layer body 4 is pressed, pressure is also applied to the intake valve body 45a from below through the through hole 4c, the air passage T, and the communication hole 27, so that the outside air introduction valve 45 is closed. maintained. Therefore, even if the outer layer body 4 is pressed, the air between the inner layer body 3 and the outer layer body 4 does not leak from the outside air introduction hole 16, and the pressurization into the inner layer body 3 is not hindered. . Since the positive pressure in the inner layer body 3 deforms the slit valve 31 of the soft valve member 30 to open the slit, the content storage space between the soft valve member 30 and the second check valve 43 is closed. The pressure in L also increases. The valve body 43a of the second check valve 43 is lifted from the valve seat 26 by the positive pressure in the content storage space L, and the second check valve 43 is also opened. The content enters the content storage space L through the open slit of the slit valve 31, and after passing through the gap between the valve body 43a and the valve seat 26, passes through the inner space K1 to the discharge hole 14a. is poured out from

After pouring out the required amount of the contents, the user releases the pressure on the body of the outer layer body 4 . As a result, the positive pressure in the inner layer body 3 returns to the outside air pressure, and the pressure in the content storage space L also decreases in conjunction with the pressure drop in the inner layer body 3 . As a result, the slit valve 31 of the soft valve member 30 is closed, and the valve body 43a of the second check valve 43 is also brought into contact with the valve seat 26 and closed. When the soft valve member 30 and the second check valve 43 are closed, part of the content that remains without being discharged is stored in the content storage space L, thereby forming a liquid seal. That is, even if the second check valve 43 is not completely closed due to the solid matter contained in the content being caught between the valve body 43a and the valve seat 26, the solid matter is stored in the content storage space L. The filled contents act as a sealing material and cover the slit valve 31 of the soft valve member 30 . Therefore, outside air from the pouring hole 14a does not enter the inner layer body 3 through the content storage space L. In addition, even if solid matter is caught in the slit valve 31 of the soft valve member 30 and a gap is generated in the slit, if the content has a certain viscosity or more, for example, it will not be stored in the content storage space L. The contents in the container do not return to the storage space S through the gap. Therefore, since the contents are maintained in the contents storage space L, a liquid seal can be maintained.

In addition, since the outer layer body 4 attempts to return to its original shape by its own restoring force when the pressing force on the trunk portion is released, the space between the inner layer body 3 and the outer layer body 4 becomes negative pressure. As a result, the pressure below the outside air introduction valve 45 also becomes negative through the through hole 4c, the air passage T, and the communication hole 27, so that the intake valve body 45a is pulled downward and the outside air introduction valve 45 is opened. As the outside air introduction valve 45 is opened, air flows in from the outside air introduction hole 16 communicating with the outside air introduction valve 45, passes through the outer space K2, the communication hole 27, and the air passage T, and passes through the through hole 4c to the outer layer body 4. Air is introduced into the space between and the inner layer body 3 . As a result, the outer layer body 4 can be restored while the inner layer body 3 is deformed to reduce the volume.

In this embodiment, since the slit valve 31 has a dome shape that protrudes toward the pouring hole 14a side, a tensile stress acts on the slit valve 31 when the pressure inside the inner layer body 3 becomes positive. force acts in the direction to open the slit. On the other hand, when the positive pressure inside the inner layer body 3 is released, the slit valve 31 restores its original shape due to its own rigidity and closes the slit. Moreover, as described above, the valve fixing portion 23 restricts the displacement of the outer peripheral portion of the slit valve 31 in the downward and outer peripheral directions, thereby suppressing the downward opening of the slit. That is, the soft valve member 30 is designed so that it is easy to open in the direction from the inner layer body 3 toward the pouring hole 14a, and it is difficult to open in the direction in which the content flows backward from the pouring hole 14a toward the inner layer body 3. It is configured. Therefore, the force applied to squeeze the body can be reduced, and the contents in the contents storage space L are less likely to move into the inner layer body 3, thereby enhancing the liquid sealing effect.

As described above, in this embodiment, the soft valve member 30 as the first check valve is attached from below to the lower end portion of the annular valve fixing portion 23 provided on the lower cap 10a. With such a configuration, the operation of attaching the soft valve member 30 to the cap main body 10 becomes easier than when the soft valve member 30 is arranged between the upper cap 10b and the lower cap 10a. Further, when the soft valve member 30 is fitted between the upper cap 10b and the lower cap 10a as in the conventional art, the soft valve member 30 forms the valve seat that supports the valve body 43a of the second check valve 43. However, in this embodiment, the soft valve member 30 is attached to the lower end of the valve fixing portion 23 of the lower cap 10a from below. A valve seat 26 that supports the valve body 43a of the check valve 43 can be formed by a portion of the valve fixing portion 23 (upper portion of the inner cylinder 23b). Thereby, the soft valve member 30 can be miniaturized.

As described above, according to the present embodiment, the assembly work of the soft valve member 30 to the cap main body 10 can be facilitated, and the soft valve member 30 made of a soft material can be downsized to reduce the amount of resin. .

Further, in this embodiment, the fitting wall 32c of the soft valve member 30 is held between the outer cylinder 23a and the inner cylinder 23b of the valve fixing portion 23. As shown in FIG. As a result, the fitting wall 32c is restrained from radially inwardly and radially outwardly displacing (deforming). As a result, the base portion 32 is less likely to fall off the valve fixing portion 23, and the soft valve member 30 is strongly held by the valve fixing portion 23 of the lower cap 10a.

Moreover, in this embodiment, the inner cylinder 23b is configured to protrude downward from the outer cylinder 23a. Therefore, when inserting the fitting wall 32c between the outer cylinder 23a and the inner cylinder 23b, the outer peripheral surface of the lower end of the inner cylinder 23b is used as a guide surface, and the fitting wall 32c is formed on the outer peripheral surface of the inner cylinder 23b. The fitting wall 32c can be inserted into the outer cylinder 23a while the inner peripheral surface of 32c is brought into contact with the fitting wall 32c. This further facilitates the operation of attaching the soft valve member 30 to the valve fixing portion 23 .

Further, in this embodiment, by providing the pawl portion 24 that engages with the outer peripheral surface of the fitting wall 32c on the inner peripheral surface of the outer cylinder 23a, the fitting of the soft valve member 30 to the valve fixing portion 23 is further facilitated. Strength can be increased.

Further, in the present embodiment, the claw portion 24 extends obliquely upward from the proximal end portion 24a toward the distal end portion 24b, and when the fitting wall 32c is inserted between the outer cylinder 23a and the inner cylinder 23b, The distal end portion 24b is configured to elastically deform radially outward. With such a configuration, it is possible to reduce the resistance when inserting the fitting wall 32c between the outer cylinder 23a and the inner cylinder 23b, so that the work of attaching the soft valve member 30 to the valve fixing portion 23 is easier. become.

Further, in this embodiment, the valve seat 26 on which the valve body 43a is seated when the second check valve 43 is closed is provided in the inner cylinder 23b, so that the valve seat 26 can be provided integrally with the valve fixing portion 23. can. As a result, the position of the valve seat 26 with respect to the valve body 43a is stabilized, so that the stability of the function of the second check valve 43 can be enhanced, and the number of parts can be reduced compared to the case where the valve seat 26 is a separate member. can also be reduced.

Further, in this embodiment, the lower portion of the annular wall 41 that supports the valve body 43a of the second check valve 43 is held between the outer cylinder 23a and the inner cylinder 23b. With such a configuration, the position of the second check valve 43 relative to the valve fixing portion 23 is more stable, so that the stability of the function of the second check valve 43 can be further enhanced.

In this embodiment, the connecting portion 23c that connects the outer cylinder 23a and the inner cylinder 23b of the valve fixing portion 23 is located above the fitting wall 32c of the soft valve member 30 and above the annular wall 41 of the coupling valve 40. It is configured to be positioned lower than By providing such a connecting portion 23c, the outer cylinder 23a and the inner cylinder 23b can be connected so as to be integrally molded without impeding the attachment of the soft valve member 30 and the coupling valve 40 to the valve fixing portion 23.

Further, in this embodiment, the valve fixing portion 23 that supports the soft valve member 30 is formed integrally with the outer peripheral wall 11 of the cap body 10 . As a result, the number of parts can be reduced, and the number of man-hours for assembling the double container cap 1 can be reduced.

In addition, in this embodiment, even if the slit valve 31 of the soft valve member 30 is clogged with solid matter and a gap is formed in the slit, the content will not flow through the gap if the content has a certain viscosity or more. Therefore, a liquid seal can be maintained. In particular, by forming the soft valve member 30 close to the housing space S with the slit valve 31, the soft valve member 30 can be reliably closed by releasing the pressing force of the body portion, thereby shutting off the outside air. In addition, by constructing the second check valve 43 not by a slit valve but by a three-point valve or the like that is easy to open, it is possible to reduce the pressing force of the body necessary for pouring out the contents. In addition, the present invention includes sauces such as pasta sauce, pizza sauce, Worcestershire sauce, pork cutlet sauce, etc., liquid seasonings such as ketchup, mayonnaise, dressing and liquid miso, and contents containing some solids. Can be used for containment purposes. In particular, when containing contents with relatively high viscosity, the liquid sealing property is enhanced, and a remarkable effect is exhibited.

Further, in the present embodiment, the pouring hole 14a is closed by the removal portion 19, and the removal portion 19 is integrally provided with a knob portion 19b. As a result, the pouring hole 14a can be reliably closed in an unused state, and the pouring hole 14a can be opened by a simple operation of pulling the knob 19b to remove the removal part 19, thereby allowing the contents to be discharged. can be

Further, according to this embodiment, the second check valve 43 and the outside air introduction valve 45 are provided integrally with the annular wall 41, so that the number of parts is reduced and the number of steps for assembling the double container cap 1 is reduced. can do.

Although the present invention has been described with reference to the drawings and examples, it should be noted that various variations and modifications will be readily apparent to those skilled in the art based on this disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, the functions included in each component can be rearranged so as not to be logically inconsistent, and multiple components can be combined into one or divided. It should be understood that the scope of the present invention includes these.

For example, in the present embodiment, the cap main body 10 is fixed to the mouth portion 4a of the double container main body 2 by screwing. Various forms can be selected. Further, the lid body 50 of the present embodiment is integrally formed with the upper cap 10b of the cap body 10 via the hinge 53h and is engaged with the cap body 10 undercut. 50 may be formed separately and configured to be threadedly engaged with the cap body 10, or may be configured to be fixed by a plugging method, and various forms can be selected. . Also, the cap body 10 may be configured without the lid body 50 . Further, in the present embodiment, the claw portion 24 is provided on the inner peripheral surface of the outer cylinder 23a of the valve fixing portion 23, but it may be provided on the outer peripheral surface or the inner peripheral surface of the inner cylinder 23b.

1: Double container cap 2: Double container main body 3: Inner layer 3a: Top opening 4: Outer layer 4a: Mouth peripheral wall (mouth)
4b: Male screw portion 4c: Through hole 4d: Groove portion 10: Cap body 10a: Lower cap 10b: Upper cap 11: Outer peripheral wall 11a: Fitting cylindrical portion 11b: Protruding portion 12: Female threaded portion 13: Top wall 13a: Protruding portion 14 : Extraction tube 14a: Extraction hole 15: Upper fitting wall 16: Outside air introduction hole 17: Peripheral wall 18: Inner ring 19: Removal part 19b: Knob part 19d: Weakened part 21: Partition wall 23: Valve fixing part 23a: Outside Cylinder 23b: Inner cylinder 23c: Connecting portion 24: Claw portion 24a: Base end portion 24b: Tip portion 25: Inward flange 26: Valve seat 26a: Communication port 27: Communication hole 30: Soft valve member (first check valve )
31: Slit valve 32: Base portion 32a: Inner peripheral wall 32b: Lower wall 32c: Fitting wall 32d: Engaged portion 32e: Inclined surface 40: Coupling valve 41: Annular wall 43: Second check valve 43a: Valve element 43b: elastic arm 45: outside air introduction valve 45a: intake valve body 50: lid body 52: upper wall 53: lid body peripheral wall 53a: gripping portion 53b: engaging convex portion 53h: hinge 54: seal cylinder K1: inner space K2: Outer space L: content storage space S: accommodation space T: ventilation path

Claims (6)

A double-container cap to be attached to a double-container main body comprising an inner layer body for containing contents and an outer layer body for containing the inner layer body and capable of being squeezed,
a cap body having a pouring hole for pouring out the content from the inner layer body and attached to the mouth of the double container body;
Provided in the flow channel between the inner layer body and the pouring hole, it blocks the outflow of the contents from the inner layer body in a closed state, and is opened by a pressure rise in the inner layer body caused by squeezing the outer layer body. a first check valve made of a soft material and allowing the contents from the inner layer body to pass therethrough;
Provided in the flow path between the first check valve and the pouring hole, it blocks the outflow of the content from the inner layer in a closed state, and increases the pressure in the inner layer by squeezing the outer layer. a second check valve that opens together with the first check valve and allows the contents from the inner layer body to pass through,
A content storage space is provided between the first check valve and the second check valve, in which a part of the remaining content is stored after the content is discharged,
The cap body includes a lower cap attached to the mouth, and an upper cap having the pouring hole and positioned above the lower cap,
The second check valve is arranged between the lower cap and the upper cap,
The first check valve has a slit valve,
The first check valve is attached from below to a lower end portion of an annular valve fixing portion provided on the lower cap ,
The valve fixing portion has an outer cylinder and an inner cylinder that are arranged concentrically,
The first check valve has an annular fitting wall fitted and held between the outer cylinder and the inner cylinder,
A cap for a double container , wherein the inner cylinder protrudes downward from the outer cylinder . 2. The double container cap according to claim 1 , wherein the inner peripheral surface of the outer cylinder is provided with a claw portion that engages with the outer peripheral surface of the fitting wall. The claw portion extends obliquely upward from a base end portion connected to the inner peripheral surface of the outer cylinder toward a tip end portion, and is used when inserting the fitting wall between the outer cylinder and the inner cylinder. 3. The double container cap according to claim 2 , wherein said tip portion is elastically deformed radially outward. The second check valve has a valve body whose outer peripheral edge is supported by an elastic arm,
The double container cap according to any one of claims 1 to 3 , wherein the inner cylinder is provided with a valve seat on which the valve body is seated when the second check valve is closed. The second check valve is provided integrally with an inner peripheral surface of an annular wall surrounding a flow path of the contents from the inner layer body to the pouring hole,
The double container cap according to any one of claims 1 to 4 , wherein the lower part of said annular wall is held between said outer cylinder and said inner cylinder. The cap main body is provided with an outside air introduction hole for introducing outside air into a space between the outer layer body and the inner layer body as the outer layer body is restored by releasing the squeeze,
6. The double container cap according to claim 5 , wherein an outside air introduction valve for opening and closing said outside air introduction hole is provided integrally with the outer peripheral surface of said annular wall.

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