JP2021004089A - Cap for double container - Google Patents

Abstract

To provide a cap for a double container allowing for facilitating the assembly work of a check valve to a cap body and reducing the size of a check valve having a non-rigid material quality into a decrease amount of resin.SOLUTION: A cap for a double container 1 according to the present invention comprises a first check valve 30 having a non-rigid material quality provided on a flow passage between an inner layer body 3 and a pour hole 14a and a second check valve 43 provided on the flow passage between the first check valve 30 and the pour hole 14a. A content reserve space L is provided between the first check valve 30 and the second check valve 43, and the cap body 10 comprises a lower cap 10a to mate with a mouth 4a and an upper cap 10b having the pour hole 14a, the second check valve 43 is arranged between the lower cap 10a and the upper cap 10b, and the first check valve 30 has a slit valve 31. The first check valve 30 is attached from below onto a lower end of an annular valve-fixing portion 23 provided in the lower cap 10a.SELECTED DRAWING: Figure 1

Description

The present invention relates to a double container cap that is attached to the mouth of a double container and allows the contents to be poured out.

Conventionally, the container body has a configuration in which a discharge cap having a discharge port is attached to the mouth of the container body for storing the contents, and the contents stored in the container body are stored by pressing (squeezing) the body of the container body. There is known a discharge container capable of discharging a desired amount of an object from a discharge port.

Further, as such a discharge container, the container body is configured as a double container containing a volume-reducing and deformable inner layer inside the outer layer, and the contents can be discharged from the container body through the injection hole. On the other hand, a check valve having a slit valve structure for blocking the inflow of contents and outside air into the container body is known.

In a discharge container having such a configuration, when the body of the container body is pressed to discharge the contents and then the pressure on the body is released, the contents directed from the pouring hole to the container body by the check valve The inflow of outside air is blocked, and the outside air is introduced between the outer layer and the inner layer from the intake port (outside air introduction hole) provided in the discharge cap to reduce the volume of the inner layer and return the outer layer to the original. Since the shape can be restored, the contents can be discharged without being replaced with the outside air, which makes it difficult for the contents remaining inside the container body to come into contact with the air and suppresses deterioration and deterioration thereof.

Here, when the discharge container as described above is used for the purpose of accommodating the contents containing a small amount of solids or the contents containing ingredients, the solids contained in the contents are contained in the slits constituting the slit valve. May be caught and the slit valve may not close. If the slit remains open after discharge, the outside air may invade the accommodation space side of the contents, leading to deterioration or deterioration of the contents.

In order to solve such a problem, Patent Document 1 provides two check valves including a first check valve and a second check valve in the flow path of the contents from the inside of the container body to the injection hole. Disclosed is a discharge container provided with a content storage space between the two check valves in which a part of the residual content is stored after the content is discharged.

According to such a discharge container, a part of the contents remaining after the contents are discharged is stored in the contents storage space and covers the slit of the slit valve to form a so-called liquid seal, which is applied to the inner layer body. The invasion of outside air can be suppressed.

Japanese Unexamined Patent Publication No. 2019-43555

By the way, in the above discharge container, since the first check valve having a slit valve is arranged between the lower cap and the upper cap constituting the cap body, the lower cap and the upper cap are assembled at the time of assembly. The first check valve had to be placed between and.

Further, in the above discharge container, the first check valve has a slit valve having a slit, and the upper end portion extends upward from the outer peripheral edge portion of the slit valve to form a valve seat of the second check valve. The side wall extends from the slit valve to the second check valve over the entire height of the content storage space. Therefore, the first check valve becomes a relatively large member, and a relatively large amount of resin of a soft material such as silicon rubber or an elastomer for forming the first check valve is used.

Therefore, an object of the present invention is to provide a double container cap capable of facilitating the assembly work of the check valve on the cap body and reducing the size of the check valve made of a soft material to reduce the amount of resin. And.

The double container cap of the present invention is a double container cap to be attached to a double container body including an inner layer body for accommodating the contents and a squeezeable outer layer body for accommodating the inner layer body.
A cap body having a pouring hole for pouring out the contents from the inner layer and attached to the mouth of the double container body,
It is provided in the flow path between the inner layer body and the injection hole to block the outflow of the contents from the inner layer body in the closed state, while being opened by the pressure increase in the inner layer body due to the squeeze of the outer layer body. Next, a soft material first check valve that allows the contents from the inner layer to pass through,
It is provided in the flow path between the first check valve and the injection hole to block the outflow of the contents from the inner layer in a closed state, while the pressure in the inner layer rises due to the squeeze of the outer layer. A second check valve that is opened together with the first check valve and allows the contents from the inner layer to pass through is provided.
A content storage space is provided between the first check valve and the second check valve to store a part of the residual content after the content is discharged.
The cap body includes a lower cap attached to the mouth portion and an upper cap having the injection hole and located 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 and has a slit valve.
The first check valve is characterized in that it is mounted from below on the lower end of the annular valve fixing portion provided on the lower cap.

In the double container cap of the present invention, the valve fixing portion has an outer cylinder and an inner cylinder in which concentric doubles are arranged.
The first check valve preferably has an annular fitting wall that is 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 protrudes 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 diagonally 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 covered with the fitting wall. When inserted between the outer cylinder and the inner cylinder, it is preferable that the tip portion is elastically deformed outward in the radial direction.

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 in the closed state of the second check valve.

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 injection hole.
It is preferable that the lower portion of the annular wall is held between the outer cylinder and the inner cylinder.

Further, 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 body and the inner layer body as the outer layer body is restored by releasing the squeeze. It is provided,
It is preferable that the outside air introduction valve for opening and closing the outside air introduction hole is integrally provided on the outer peripheral surface of the annular wall.

According to the present invention, it is possible to provide a double container cap capable of facilitating the assembly work of the check valve on the cap body and reducing the amount of resin of the soft material forming the check valve.

It is sectional drawing of the cap for a double container which concerns on one Embodiment of this invention. It is a partially enlarged sectional view of the cap for a double container of FIG. It is a bottom view which shows the 1st check valve (slit valve) and the valve fixing part which constitute the cap for a double container which concerns on one Embodiment of this invention.

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

FIG. 1 shows a state in which the double container cap 1 according to the embodiment of the present invention is attached to a double container main body 2 suitable for the double container cap 1. 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 50.

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

First, the double container main body 2 will be described. In the present embodiment, the double container main body 2 forms a laminated peeling container by performing extrusion blow molding on a parison formed by laminating the synthetic resin material of the inner layer 3 and the synthetic resin material of the outer layer 4. I'm shaping. Ethylene-vinyl alcohol copolymer resin (EVOH) or nylon is used as the material of the inner layer 3 constituting the double container main body 2. Further, low density polyethylene (LDPE), high density polyethylene resin (HDPE) or polypropylene (PP) is used as the material of the outer layer body 4, and high squeeze property can be imparted particularly when LDPE is used. it can. However, the present invention is not limited to this embodiment, and a laminated peeling container may be formed by, for example, biaxially stretched blow molding from a test tubular preform. In that case, for example, polypropylene (PP) can be used as the material of the inner layer body 3, and polyethylene terephthalate (PET) can be used as the material of the outer layer body 4. Further, as the material of the inner layer body 3 and the outer layer body 4, other resins having low compatibility with each other can be used, and the molding method of the laminated peeling container is not particularly limited. Further, the double container main body 2 may be a container in which the outer layer body 4 and the inner layer body 3 are individually formed and assembled instead of the laminated peeling container. Further, although not shown, one or a plurality of adhesive bands extending in the vertical direction and partially joining the inner layer 3 and the outer layer 4 are provided between the inner layer 3 and the outer layer 4. It may be provided.

The inner layer body 3 is formed so as to be deformable in volume reduction, and in the present embodiment, it is obtained by peeling the double container main body 2 formed in a laminated state from the outer layer body 4. .. The inner layer 3 includes a storage space S for accommodating the contents inside the inner layer body 3 and an upper opening 3a connected to the accommodation space S.

The outer layer body 4 is formed by connecting a body portion (not shown) having recoverable flexibility and a bottom portion (not shown) that closes the lower end of the body portion to a cylindrical mouth portion peripheral wall 4a (mouth portion). A male screw portion 4b is provided on the outer peripheral surface of the mouth peripheral wall 4a. Further, the mouth peripheral wall 4a is provided with a through hole 4c for taking in air between the inner layer body 3 and the mouth peripheral wall 4a, and a male screw portion 4b is cut in the vertical direction on the outer peripheral surface of the mouth peripheral wall 4a. The missing groove 4d is provided.

Next, the cap body 10 constituting the double container cap 1 will be described. As described above, the cap body 10 is composed of a lower cap 10a mounted on the peripheral wall 4a of the mouth and an upper cap 10b having an injection hole 14a and located above the lower cap 10a.

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

A partition wall 21 covering the upper opening 3a of the inner layer 3 is formed from the inner peripheral surface of the outer peripheral wall 11 inward in the radial direction. The partition wall 21 is arranged between the injection hole 14a and the inner layer body 3 and airtightly contacts the upper opening 3a of the double container main body 2 to close the upper opening 3a. A valve fixing portion 23 for attaching a slit valve 31, which will be described later, is integrally provided on the radial inside (center 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 constituting the cap body 10 will be described. The upper cap 10b has a peripheral wall 17 that fits into the fitting cylinder 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. Further, a pouring cylinder 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 on the inner peripheral surface of the pouring cylinder 14. In the unused state of the double container cap 1, the injection hole 14a is closed by the removing portion 19 connected to the upper cap 10b (cap body 10) via the weakening portion 19d as shown in FIG. There is. On the upper surface of the removing portion 19, a knob portion 19b (pull ring) for pulling the removing portion 19 upward from the upper cap 10b to remove the removing portion 19 is integrally provided. The upper cap 10b does not have to have a structure of a removing portion 19 that closes the injection hole 14a in an unused state.

On the lower surface of the top wall 13, a pair of upper fitting walls 15 having a concentric double arrangement are provided. Further, an outside air introduction hole 16 penetrating the top wall 13 is provided on the outer side in the radial direction from the upper fitting wall 15. In the present 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 a ventilation passage T leading to the through hole 4c is provided between the mouth peripheral wall 4a and the outer peripheral wall 11.

In the present embodiment, the groove portion 4d that cuts out the male screw portion 4b in the vertical direction is used as the ventilation path T, but the present embodiment is not limited to this embodiment. The groove portion 4d may not be provided, and the gap between the male screw portion 4b and the female screw portion 12 may be used as the ventilation path T.

Further, in the present 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 so that the outside air is introduced into the space between the outer layer body 4 and the inner layer body 3. However, the present invention 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 from the slit at the pinch-off portion at the bottom of the double container body 2.

As described above, the lower cap 10a is formed with a partition wall 21 that covers the upper opening 3a of the inner layer body 3. In the present embodiment, the partition wall 21 is integrally molded with the outer peripheral wall 11 of the lower cap 10a, and an annular valve fixing portion 23 is integrally provided on the inner peripheral edge portion of the partition wall 21. That is, the valve fixing portion 23 is integrally molded 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 residual contents is stored after the contents are discharged.

Here, FIG. 2 is a partially enlarged view of FIG. 1, and FIG. 3 is a bottom view of the valve fixing portion 23 as viewed from below. As shown in FIGS. 2 and 3, the valve fixing portion 23 has a concentric double-arranged cylindrical outer cylinder 23a and an inner cylinder 23b. The outer cylinder 23a extends downward from the inner peripheral edge portion 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 mouth peripheral wall 4a, and seals the upper opening 3a.

On the inner peripheral surface of the outer cylinder 23a, a claw portion 24 that engages with the outer peripheral surface of the fitting wall 32c of the soft valve member 30 is provided. The valve fixing portion 23 has a connecting portion 23c that connects the outer cylinder 23a and the inner cylinder 23b, and the connecting portion 23c is above the fitting wall 32c held between the outer cylinder 23a and the inner cylinder 23b. Moreover, it is located below the annular wall 41 of the coupling valve 40 described later.

The claw portion 24 of this example is provided so as to project inward in the radial direction 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 90 ° intervals along the circumferential direction of the outer cylinder 23a. Further, the connecting portion 23c of this example is provided in the circumferential direction region excluding the circumferential direction region in which the claw portion 24 is provided in the plan view shown in FIG.

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

The inner cylinder 23b is arranged at intervals inside the outer cylinder 23a in the radial direction. Further, the inner cylinder 23b projects downward from the outer cylinder 23a. That is, the lower end of the inner cylinder 23b is located 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 23b, 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 body 43a elastically supported by the elastic arm 43b is seated on the upper surface of the valve seat 26. 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 injection hole 14a. The inside of the inner cylinder 23b serves as a flow path for the contents, and also constitutes a contents storage space L. The content storage space L is partitioned by an inner cylinder 23b including the inward flange 25 and the valve seat 26, a soft valve member 30, and a second check valve 43.

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

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

The slit valve 31 is arranged so as to close 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 lower inner peripheral surface of the inner cylinder 23b. The fitting wall 32c is fitted and held between the outer cylinder 23a and the inner cylinder 23b.

On the outer peripheral surface of the fitting wall 32c, an engaged portion 32d with which the claw portion 24 of the outer cylinder 23a is engaged is provided. Further, 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. The engaged portion 32d of this example is formed of a concave portion into which the claw portion 24 enters, but is not limited to this, and may be formed of a convex portion in which the claw portion 24 engages from below.

A second check valve 43 is provided between the injection hole 14a 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). As shown in FIG. 1, the second check valve 43 is provided inside the cylindrical annular wall 41 in the radial direction as a part of the coupling valve 40. The second check valve 43 is a so-called three-point valve having a structure in which three points on the outer peripheral edge of the disc-shaped valve body 43a are supported by elastic arms 43b. Then, when the valve body 43a comes into contact with the upper surface of the valve seat 26, the second check valve 43 is closed. The upper surface of the valve body 43a may be provided with a member such as a convex portion that regulates the upward displacement of the valve body 43a when the lid body 50 is closed.

When the pressure inside the inner layer 3 is increased by the squeeze of the outer layer 4, 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 connected. The pressure in the content storage space L between them increases. Due to the pressure, the valve body 43a is lifted upward in FIG. 1 against the elastic force of the elastic arm 43b, and the second check valve 43 is opened by being separated from the valve seat 26. When the squeeze of the outer layer body 4 is released, the pressure inside the inner layer body 3 decreases, and the slit valve 31 is closed. Further, since the pressure in the content storage space L also decreases as the pressure in the inner layer body 3 decreases, the valve body 43a comes into contact with the valve seat 26 again due to its own weight and the elastic force of the elastic arm 43b, and the second reverse The check valve 43 is closed.

The content 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 content when the content is discharged, and also serves as a flow path for the content. A part of the contents remaining afterwards is stored in the contents storage space L to cover and seal the slit valve 31 of the soft valve member 30. That is, the contents stored in the contents storage space L form a so-called liquid seal, and the intrusion of outside air into the inner layer 3 can be suppressed.

In the present embodiment, the slit valve 31 has a dome shape having a convex shape upward, but is not limited to this embodiment, and may have a convex shape downward, for example, as a planar shape. May be good. Further, 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-shaped), three (Y-shaped), or five or more. It may have a shape consisting of radial slits.

Further, in the present embodiment, the valve body 43a constituting the second check valve 43 is composed of a disk-shaped member, but the present invention is not limited to this embodiment, and a member having a rectangular shape or the like may be used. Further, the second check valve 43 does not necessarily have to be a three-point valve, and a one-point valve in which the valve body is supported at one place or two points in which the valve body is supported by two or four elastic arms. Various valves, such as valves and four-point valves, that are opened by positive pressure in the inner layer 3 can be used.

As shown in FIG. 1, an outside air introduction valve 45 is provided on the outer side of the annular wall 41 in the radial direction. The outside air introduction valve 45 is formed as an annular and thin-walled intake valve body 45a on the radial outer side of the annular wall 41. The intake valve body 45a introduces outside air by connecting the inner peripheral edge portion to the outer peripheral surface of the annular wall 41 and seating the outer peripheral edge portion on the lower end of the inner ring 18 hanging from the lower surface of the top wall 13 of the cap body 10. The hole 16 is closed.

In the present embodiment, the second check valve 43 and the outside air introduction valve 45 are configured to be integrally provided with the annular wall 41, but the present invention is not limited to this embodiment, and for example, the second check valve 43 and the outside air are provided. The introduction valve 45 may be provided separately. Further, the second check valve 43 and the outside air introduction valve 45 may be fixed to something other than the annular wall 41.

In the present embodiment, when the second check valve 43 is attached to the cap body 10 as shown in FIG. 1, the lower portion of the annular wall 41 is between the outer cylinder 23a and the inner cylinder 23b of the valve fixing portion 23. Fitted and held. The annular wall 41 is arranged above the connecting portion 23c. Further, 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 for communicating the communication port 26a and the injection hole 14a to form a flow path for the contents is formed inside the annular wall 41 in the radial direction, and the ring is formed. An outer space K2 is formed on the radial outer side of the wall 41 to form an air flow path by communicating 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 injection hole 14a and the outside air introduction hole 16. More specifically, the lid 50 includes a flat upper wall 52 and a lid peripheral wall 53 that is connected to the outer peripheral edge of the upper wall 52 and whose outer peripheral surface is continuous with the peripheral wall 17. An engaging convex portion 53b that undercuts and engages with a protruding portion 13a extending upward and radially outward from the upper surface of the top wall 13 of the upper cap 10b is provided on the inner peripheral surface of the lower portion of the lid peripheral wall 53. .. Further, on the lower surface of the upper wall 52, a tubular seal cylinder 54 is provided which enters the inside of the injection cylinder 14 when the lid 50 is closed and seals the injection hole 14a. As shown in FIG. 1, a grip portion 53a is formed on the peripheral wall 53 of the lid at a position in the circumferential direction facing the hinge 53h.

When discharging the contents from the double container cap 1 configured as described above, the lid 50 is rotated around the hinge 53h to open while gripping the grip portion 53a from the state shown in FIG. Then, by pulling the knob portion 19b shown in FIG. 1 upward, the weakened portion 19d formed as the thin-walled portion is torn off, and the removing portion 19 is removed from the upper cap 10b. As a result, the injection hole 14a is opened, and the contents can be discharged. In this state, the double container main body 2 is tilted forward from the standing posture to be in a tilted posture, and the body portion of the outer layer body 4 is pressed (squeeze). As a result, the inside of the inner layer 3 is pressurized through the air between the inner layer 3 and the outer layer 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 ventilation path T, and the communication hole 27, so that the outside air introduction valve 45 is closed. Be maintained. Therefore, even if the outer layer 4 is pressed, the air between the inner layer 3 and the outer layer 4 does not leak from the outside air introduction hole 16, and the pressurization into the inner layer 3 is not hindered. .. Then, the positive pressure in the inner layer body 3 deforms the slit valve 31 of the soft valve member 30 to open the slit, so that the content storage space between the soft valve member 30 and the second check valve 43 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, further passes through the gap between the valve body 43a and the valve seat 26, and then passes through the inner space K1 and the injection hole 14a. Is poured out from.

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

Further, when the pressure on the body portion is released, the outer layer body 4 tries to return to the original shape by its own restoring force, so that the space between the inner layer body 3 and the outer layer body 4 becomes a negative pressure. As a result, the pressure below the outside air introduction valve 45 also becomes negative through the through hole 4c, the ventilation 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. With the opening of the outside air introduction valve 45, 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 ventilation passage T, and the outer layer body 4 is passed through the through hole 4c. Air is introduced into the space between the inner layer 3 and the inner layer 3. As a result, the outer layer 4 can be restored while the inner layer 3 is reduced in volume and deformed.

In this embodiment, since the slit valve 31 has a dome shape that is convex toward the injection hole 14a, tensile stress acts on the slit valve 31 when the pressure inside the inner layer 3 becomes positive. A force acts in the direction of opening the slit. On the other hand, when the positive pressure in the inner layer body 3 is released, the slit valve 31 restores to the original shape by its own rigidity and closes the slit. Moreover, as described above, the outer peripheral edge portion of the slit valve 31 is restricted from being displaced downward and outward by the valve fixing portion 23, so that the slit is prevented from opening downward. That is, the soft valve member 30 is easy to open in the direction in which the contents are directed from the inner layer 3 toward the injection hole 14a, and is difficult to open in the direction in which the contents are going to flow back from the injection hole 14a toward the inner layer 3. It is configured. Therefore, the force applied to squeeze the body portion can be reduced, and the contents in the content storage space L can be made difficult to move into the inner layer body 3, and the effect of the liquid seal can be enhanced.

As described above, in the present embodiment, the soft valve member 30 as the first check valve is mounted from below on the lower end of the annular valve fixing portion 23 provided on the lower cap 10a. With such a configuration, the work of attaching the soft valve member 30 to the cap body 10 becomes easier as compared with the case where 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 case, the valve seat supporting the valve body 43a of the second check valve 43 is formed by the soft valve member 30. However, in the present embodiment, the soft valve member 30 is easily attached to the lower end of the valve fixing portion 23 of the lower cap 10a from below because the soft valve member 30 tends to be large. The valve seat 26 that supports the valve body 43a of the check valve 43 can be formed by a part of the valve fixing portion 23 (the upper part of the inner cylinder 23b). As a result, 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 with respect to the cap body 10 can be facilitated, and the soft valve member 30 made of a soft material can be miniaturized to reduce the amount of resin. ..

Further, in the present 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 a result, the fitting wall 32c is in a state in which displacement (deformation) in the radial inner direction and the radial outer direction is suppressed. As a result, the base portion 32 is less likely to fall off from 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.

Further, in the present embodiment, the inner cylinder 23b is configured to protrude downward from the outer cylinder 23a. Therefore, when the fitting wall 32c is inserted between the outer cylinder 23a and the inner cylinder 23b, the outer peripheral surface of the lower end portion of the inner cylinder 23b is used as a guide surface, and the fitting wall is formed on the outer peripheral surface of the inner cylinder 23b. The fitting wall 32c can be inserted inside the outer cylinder 23a while bringing the inner peripheral surfaces of the 32c into contact with each other. This makes it easier to attach the soft valve member 30 to the valve fixing portion 23.

Further, in the present embodiment, by providing the claw 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 soft valve member 30 is further fitted to the valve fixing portion 23. The strength can be increased.

Further, in the present embodiment, when the claw portion 24 extends diagonally upward from the base end portion 24a toward the tip end portion 24b and the fitting wall 32c is inserted between the outer cylinder 23a and the inner cylinder 23b, The tip portion 24b is configured to elastically deform outward in the radial direction. With such a configuration, the resistance force when the fitting wall 32c is inserted between the outer cylinder 23a and the inner cylinder 23b can be reduced, so that the work of attaching the soft valve member 30 to the valve fixing portion 23 is easier. become.

Further, in the present embodiment, the valve seat 26 on which the valve body 43a is seated is provided in the inner cylinder 23b in the closed state of the second check valve 43, so that the valve seat 26 is provided integrally with the valve fixing portion 23. it 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 improved, and the number of parts is reduced as compared with the case where the valve seat 26 is a separate member. It can also be reduced.

Further, in the present 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 with respect to the valve fixing portion 23 is more stable, so that the functional stability of the second check valve 43 can be further enhanced.

Further, in the present embodiment, the connecting portion 23c that connects the outer cylinder 23a and the inner cylinder 23b of the valve fixing portion 23 is above the fitting wall 32c of the soft valve member 30, and the annular wall 41 of the coupling valve 40. It is configured to be located below. By providing such a connecting portion 23c, the outer cylinder 23a and the inner cylinder 23b can be integrally molded without hindering the attachment of the soft valve member 30 and the coupling valve 40 to the valve fixing portion 23.

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

Further, in the present 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, for example, if the content has a certain viscosity or more, the content does not flow in through the gap. Therefore, the liquid seal can be maintained. In particular, by forming the soft valve member 30 close to the accommodation space S with the slit valve 31, the soft valve member 30 can be reliably closed and the outside air can be shut off by releasing the pressure on the body portion. Further, by forming the second check valve 43 not with a slit valve but with a three-point valve or the like that can be easily opened, it is possible to reduce the pressing force of the body portion required for ejecting the contents. In addition, the present invention includes, for example, sauces such as pasta sauce, pizza sauce, Worcestershire sauce, tonkatsu sauce, and liquid seasonings containing ingredients such as ketchup, mayonnaise, dressing, and liquid miso. It can be used for containment. Especially when the contents having a relatively high viscosity are stored, the liquid sealing property is enhanced and a remarkable effect is exhibited.

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

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

Although the present invention has been described with reference to the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and modifications based on the present disclosure. Therefore, it should be noted that these modifications 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 a plurality of components can be combined or divided into one. It should be understood that these are also included in the scope of the present invention.

For example, in the present embodiment, the cap body 10 is fixed to the mouth portion 4a of the double container body 2 by screw engagement, but it may be fixed by a plugging type such as undercut. Various forms can be selected. Further, the lid 50 of the present embodiment is integrally molded with the upper cap 10b of the cap body 10 via the hinge 53h, and is undercut engaged with the cap body 10, but the cap body 10 and the lid are engaged. The 50 may be formed separately so as to be screw-engaged with the cap body 10, or may be fixed by a plug type, and the form can be selected in various ways. .. Further, the cap body 10 may be configured not to include 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 body 3: Inner layer 3a: Upper 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 cylinder portion 11b: Projection portion 12: Female screw portion 13: Top wall 13a: Projection portion : Dispensing cylinder 14a: Discharging hole 15: Upper fitting wall 16: Outside air introduction hole 17: Peripheral wall 18: Inner ring 19: Removing part 19b: Picking part 19d: Weakened part 21: Partition 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: Engagement portion 32e: Inclined surface 40: Coupling valve 41: Circular wall 43: Second check valve 43a: Valve body 43b: Elastic arm 45: Outside air introduction valve 45a: Intake valve body 50: Lid body 52: Upper wall 53: Lid body peripheral wall 53a: Grip portion 53b: Engagement convex portion 53h: Hinge 54: Seal cylinder K1: Inner space K2: Outer space L: Contents storage space S: Storage space T: Ventilation path

Claims (8)

A double container cap to be attached to a double container body including an inner layer body for accommodating the contents and a squeeze outer layer body for accommodating the inner layer body.
A cap body having a pouring hole for pouring out the contents from the inner layer and attached to the mouth of the double container body,
It is provided in the flow path between the inner layer body and the injection hole to block the outflow of the contents from the inner layer body in the closed state, while being opened by the pressure increase in the inner layer body due to the squeeze of the outer layer body. Next, a soft material first check valve that allows the contents from the inner layer to pass through,
It is provided in the flow path between the first check valve and the injection hole to block the outflow of the contents from the inner layer in a closed state, while the pressure in the inner layer rises due to the squeeze of the outer layer. A second check valve that is opened together with the first check valve and allows the contents from the inner layer to pass through is provided.
A content storage space is provided between the first check valve and the second check valve to store a part of the residual content after the content is discharged.
The cap body includes a lower cap attached to the mouth portion and an upper cap having the injection hole and located 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 and has a slit valve.
The first check valve is a double container cap characterized in that it is attached to the lower end of an annular valve fixing portion provided on the lower cap from below. The valve fixing portion has a concentric double-arranged outer cylinder and an inner cylinder, and has an inner cylinder.
The double container cap according to claim 1, wherein the first check valve has an annular fitting wall that is fitted and held between the outer cylinder and the inner cylinder. The double container cap according to claim 2, wherein the inner cylinder projects downward from the outer cylinder. The double container cap according to claim 2 or 3, wherein a claw portion that engages with the outer peripheral surface of the fitting wall is provided on the inner peripheral surface of the outer cylinder. The claw portion extends diagonally upward from the base end portion connected to the inner peripheral surface of the outer cylinder toward the tip portion, and when the fitting wall is inserted between the outer cylinder and the inner cylinder. The double container cap according to claim 4, wherein the tip portion is elastically deformed outward in the radial direction. 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 2 to 5, wherein a valve seat on which the valve body is seated is provided in the inner cylinder in a closed state of the second check valve. 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 injection hole.
The double container cap according to any one of claims 2 to 6, wherein the lower portion of the annular wall is held between the outer cylinder and the inner cylinder. The cap body is provided with an outside air introduction hole for introducing outside air into the space between the outer layer body and the inner layer body as the outer layer body is restored by releasing the squeeze.
The double container cap according to claim 7, wherein an outside air introduction valve for opening and closing the outside air introduction hole is integrally provided on the outer peripheral surface of the annular wall.

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