JP6866014B2 - Double container cap - Google Patents

Description

The present invention relates to a double container cap.

Conventionally, there is known a double container cap attached to the mouth of a double container body including an inner layer body for accommodating the contents and an outer layer body for accommodating the inner layer body. For example, Patent Document 1 describes a pouring cylinder having a tubular inner peripheral surface for partitioning a flow path of contents, and an annular close portion that is in close contact with the inner peripheral surface of the pouring cylinder at a closed position over the entire circumference. A cap for a double container with a lid having a lid is described.

Japanese Unexamined Patent Publication No. 2016-193736

When a conventional double container cap having a pouring cylinder and a lid having an annular close portion as described in Patent Document 1 is used, depending on the type of contents and the shape of the pouring cylinder, etc. In some cases, the lid could not be closed as intended after the contents were poured out (for example, the contents remained in the spout, the space volume was reduced, and the lid was pressurized and did not close).

The present invention has been developed in view of such a problem, and an object of the present invention is to provide a cap for a double container in which a lid can be easily closed after pouring out the contents.

The double container cap according to the present invention is
A double container cap attached to the mouth of a double container body including an inner layer body for accommodating the contents and an outer layer body for accommodating the inner layer body.
A pouring cylinder having a tubular inner peripheral surface that partitions the flow path of the contents,
It is provided with a lid that can be moved between a closed position that covers the upper part of the dispenser and an open position that opens the upper part of the dispenser.
The lid has an annular close portion that is in close contact with the lower end edge of a predetermined annular region on the inner peripheral surface of the dispensing cylinder at the closed position over the entire circumference.
It said annular region have a air grooves forming the passage of air between the annular closely portion upon movement of said lid to said closed position,
The pouring cylinder has a valve body holding portion that holds the moving valve body so as to be movable up and down below the annular region.
The valve body holding portion has a reduced diameter portion that regulates the downward movement of the moving valve body.
A groove is formed on the inner peripheral surface of the reduced diameter portion to return the contents in the dispensing cylinder to the inside of the inner layer body when the moving valve body comes into contact with the inner peripheral surface. It is characterized by.

Further, in the double container cap according to the present invention,
The lid can be moved from the open position to the closed position by bending the hinge.
The annular region preferably has the air groove only in the half-circumferential portion on the opposite side of the hinge.

Further, in the double container cap according to the present invention, it is preferable that the annular region has a plurality of the air grooves.

Further, in the double container cap according to the present invention, it is preferable that the valve body holding portion of the dispensing cylinder has a plurality of ribs that restrict the upward movement of the moving valve body.

According to the present invention, it is possible to provide a double container cap capable of easily closing the lid after pouring out the contents.

(A) is a partial cross-sectional side view showing a state in which the double container cap according to the embodiment of the present invention is attached to the mouth of the double container body. (B) is an end view along the line AA of (a), and shows a state when the lid is in the closed position. (C) is an end view along the line AA of (a), and shows a state when the lid is in the open position.

Hereinafter, the double container cap according to the embodiment of the present invention will be described in detail with reference to the drawings. In this specification, the vertical direction is based on the state in which the double container is erected.

As shown in FIG. 1, the double container cap (hereinafter, also simply referred to as “cap”) 1 according to the present embodiment accommodates an inner layer 2 for accommodating the contents (not shown) and the inner layer 2 for accommodating the contents (not shown). It is attached to the mouth portion 5 of the double container main body 4 including the outer layer body 3 to form the double container 6. The outer layer 3 forms the outer shell of the double container body 4, and the inner layer 2 can be reduced in volume and deformed as the contents are poured out. The outer layer 3 is formed with an outside air introduction hole (not shown) for introducing outside air between the outer layer 3 and the inner layer 2 due to the volume reduction deformation of the inner layer 2. In the present embodiment, the double container 6 has a tubular mouth portion 5, a body portion connected to the mouth portion 5 and expanded in diameter from the mouth portion 5, and a bottom portion that closes the lower end of the body portion. It has a bottle shape and has an outside air introduction hole arranged at the bottom of the double container 6. The shape of the double container 6 and the arrangement of the outside air introduction holes can be changed as appropriate. The type of the content is not particularly limited as long as it is a liquid, and may have various viscosities, and may be, for example, a solid-liquid mixture containing a solid.

In the present embodiment, the double container main body 4 sandwiches a laminated parison formed by laminating the synthetic resin material of the inner layer 2 and the synthetic resin material of the outer layer 3 with a mold, and blows air into the delamination. It is formed by EBM (Extrusion Blow Molding) that forms a container (laminated peeling container). The inner layer 2 has a two-layer structure of an outer ethylene vinyl alcohol copolymer resin (EVOH) and an inner modified polyolefin resin (“Admer” (registered trademark) manufactured by Mitsui Chemicals, Inc.), and the outer layer 3 has an outer layer 3. It has a two-layer structure consisting of a low-density polyethylene resin (LDPE) and an inner polypropylene resin (PP). In the present embodiment, the outer layer of the outer layer 3 is made of low density polyethylene resin (LDPE) in order to impart recoverable flexibility (squeeze property), but polypropylene resin (PP) and medium density are used. It is also possible to use a polyethylene resin (MDPE) or a high-density polyethylene resin (HDPE). Further, the polypropylene resin (PP) layer constituting the outer layer body 3 of the present embodiment is provided in order to improve the peelability of the inner layer body 2, and is not always necessary. Further, the above layer structure is an example, and as long as the inner layer 2 can be peeled off from the outer layer 3, the materials of the outer layer 3 and the inner layer 2 are not particularly limited, and any material can be selected. It is possible, and each may have a single-layer structure or a multi-layer structure. Further, one or a plurality of adhesive bands may be provided between the inner layer body 2 and the outer layer body 3 so as to extend in the vertical direction and partially join the inner layer body 2 and the outer layer body 3. Further, instead of extrusion blow molding, from a preform (container material) formed in a bottomed tubular shape including an inner layer made of the synthetic resin material of the inner layer 2 and an outer layer made of the synthetic resin material of the outer layer 3. The double container main body 4 may be formed by biaxial stretch blow molding for forming a laminated peeling container. Further, the double container main body 4 may be a container in which the inner layer body 2 and the outer layer body 3 are individually formed and assembled instead of the laminated peeling container.

The cap 1 is a pouring cylinder 8 having a tubular engaging cylinder 7 that engages with the outer peripheral surface of the mouth portion 5 of the double container body 4 and a tubular inner peripheral surface that partitions the flow path of the contents. And a top wall 9 extending radially outward from the outer peripheral surface of the dispensing cylinder 8 and covering the upper part of the mouth portion 5. Further, the cap 1 includes a lid 10 that can be moved between a closed position that covers the upper part of the dispenser 8 and an open position that opens the upper part of the dispenser 8. In the present embodiment, the injection cylinder 8 has a valve body holding portion 12 that holds the moving valve body 11 so as to be vertically movable. Further, the lid body 10 is connected to the engaging cylinder 7 via the hinge 13, and can be moved from the open position to the closed position by bending the hinge 13. The pouring cylinder 8 is arranged at a position eccentric from the central axis O of the mouth portion 5 to the side opposite to the hinge 13, but may be arranged, for example, on the central axis O of the mouth portion 5. The arrangement can be changed as appropriate.

In the present embodiment, the engaging cylinder 7, the dispensing cylinder 8, the top wall 9, the hinge 13 and the lid 10 are a part of a single injection-molded product made of a synthetic resin material, and are integrally molded with each other. ing. It is also possible to mold the lid 10 into a separate body without providing the hinge 13. For example, the lid body 10 is fitted to a single injection-molded product in which the engaging cylinder 7, the dispensing cylinder 8 and the top wall 9 are integrally molded by screw engagement or fitting through overcoming the uneven portion. It may be configured to be removable. Further, the engaging cylinder 7, the pouring cylinder 8 and the top wall 9 may be configured by assembling those molded separately. The cap 1 may have an inner plug between the pouring cylinder 8 and the mouth portion 5. In this case, the valve body holding portion 12 can be provided in the inner plug instead of being provided in the pouring cylinder 8.

The engaging cylinder 7 is engaged with the outer peripheral surface of the mouth portion 5 by fitting through overcoming the uneven portion. The engaging cylinder 7 may be configured to be screw-engaged with, for example, the outer peripheral surface of the mouth portion 5. The mouth portion 5 and the engaging cylinder 7 have a cylindrical shape in the present embodiment, but if they have a tubular shape, they may have a polygonal tubular shape, an elliptical tubular shape, or the like.

The top wall 9 connects the outer peripheral surface of the dispensing cylinder 8 and the upper portion of the engaging cylinder 7, and covers the outer peripheral surface of the dispensing cylinder 8 and the upper end portion of the mouth portion 5 without a gap. A cylindrical sealing projection 14 hanging from the bottom surface of the top wall 9 is integrally formed on the top wall 9. The sealing protrusion 14 is in close contact with the upper end portion on the inner peripheral surface of the mouth portion 5 over the entire circumference. Further, the upper end surface of the mouth portion 5 is in contact with the bottom surface of the top wall 9. On the outer peripheral edge of the top wall 9, a stepped portion 15 composed of an upper surface and an outer peripheral surface of the top wall 9 is provided over the entire circumference.

The dispensing cylinder 8 has a portion extending upward from the connecting portion with the top wall 9, and the upper end edge portion of the portion extends radially outward in a lip shape over the entire circumference and the upper end edge thereof. The section forms a spout for pouring out the contents. Further, the dispensing cylinder 8 has a portion extending downward from the connecting portion with the top wall 9, and the portion has a valve body holding portion 12. The valve body holding portion 12 has a plurality of ribs 16 that regulate the upward movement of the mobile valve body 11, and a diameter-reduced portion 17 that regulates the downward movement of the mobile valve body 11. In the valve body holding portion 12, the injection cylinder 8 has a two-stage cylindrical shape having a reduced diameter portion 17 at the lower end portion, and a plurality of ribs 16 are integrally formed on the inner peripheral surface thereof. The plurality of ribs 16 extend in the vertical direction and are arranged so as to be spaced apart from each other in the circumferential direction. Further, the upper end portion of each rib 16 projects inward in the radial direction, and when the spherical moving valve body 11 moves upward, the moving valve body 11 comes into contact with the upper end portions of the plurality of ribs 16 and further upward. The movement to is blocked (see the alternate long and short dash line in FIG. 1 (a)). Also, at that time, the contents can pass through the gaps between the plurality of ribs 16.

On the inner peripheral surface of the reduced diameter portion 17, a plurality of fine grooves 18 extending in the vertical direction are formed while being arranged at intervals in the circumferential direction. The groove 18 finishes pouring the contents, raises the double container 6, and when the moving valve body 11 moves downward and comes into contact with the inner peripheral surface of the reduced diameter portion 17, the pouring cylinder 8 It is provided to return a part of the contents remaining inside to the inside of the inner layer 2 through the groove 18. Even if a part of the contents is returned to the inside of the inner layer body 2 in this way, if the remaining part is attached to the groove 18 due to its surface tension, the moving valve body 11 is in close contact with the reduced diameter portion 17. This can be suppressed, and even when the lid 10 is in the open position, the intrusion of outside air into the inner layer 2 is prevented, and the quality of the contents can be maintained satisfactorily. The size of the groove 18 can be appropriately set according to the type and viscosity of the contents. It is also possible to have a configuration in which the groove 18 is not provided. The mobile valve body 11 is not limited to a spherical shape, and its shape can be changed as appropriate. Further, the shape of the pouring cylinder 8 in the valve body holding portion 12 is not limited to the cylindrical cross-sectional shape, and the cross-sectional shape thereof can be changed as appropriate.

The lid 10 has a cylindrical (cylindrical in this example) outer peripheral wall 19 that can be engaged with the stepped portion 15 of the top wall 9 by fitting through overcoming the uneven portion, and the lid 10 is in a closed position. A top wall 20 that closes the upper end of the outer peripheral wall 19 at a certain time, a cylindrical sealing cylinder wall 21 that hangs down from the bottom surface of the top wall 20 when the lid 10 is in the closed position, and a sealing cylinder wall 21. It has a cylindrical pin 22 that hangs down from the bottom surface of the top wall 20 on the inner side in the radial direction of the top wall 20. The pins 22 are arranged concentrically with the sealing cylinder wall 21. Further, the pin 22 is moved by the tip of the pin 22 by moving the lid 10 to the closed position even when the moving valve body 11 is attached to the plurality of ribs 16 at the upper end position of the moving range. The length is set so that the moving valve body 11 can be pushed downward and dropped toward the lower end position of the moving range (see the two-dot chain line in FIG. 1A). The shape of the pin 22 can be changed as appropriate. Further, the pin 22 may not be provided. In the present embodiment, the outer peripheral wall 19, the top wall 20, the sealing cylinder wall 21 and the pin 22 are integrally molded, but they may be assembled as a separate body.

The sealing cylinder wall 21 has an annular close portion 24 that is in close contact with the lower end edge of a predetermined annular region 23 on the inner peripheral surface of the dispensing cylinder 8 over the entire circumference when the lid 10 is in the closed position. doing. In this way, when the lid 10 is in the closed position, the annular close portion 24 is in close contact with the lower end edge of the annular region 23 over the entire circumference, thereby sealing the inside of the dispensing cylinder 8 and forming an inner layer body. It is configured to prevent the intrusion of outside air into the inside of 2. In the present embodiment, the annular close portion 24 is provided on the outer peripheral surface of the sealing cylinder wall 21 over the entire circumference, and is configured by an annular protrusion forming an annular shape protruding outward in the radial direction. The configuration of the annular close portion 24 is not limited to such an annular protrusion, and can be appropriately changed. Further, the shape of the sealing cylinder wall 21 can be changed as appropriate. Instead of providing the sealing cylinder wall 21, another structure having an annular close portion 24 may be provided.

The annular region 23 is located above the valve body holding portion 12. Further, the annular region 23 has an air groove 25 that forms an air passage between the annular region 23 and the annular close portion 24 when the lid 10 is moved to the closed position. In FIG. 1A, the orbit drawn by the annular close portion 24 when the lid 10 is moved to the closed position is shown by a chain double-dashed line. As shown in FIGS. 1 (b) and 1 (c), in the present embodiment, the annular region 23 has an air groove 25 only in the half circumference portion on the opposite side of the hinge 13. Further, in the present embodiment, the annular region 23 has a plurality of air grooves 25. Although three air grooves 25 are provided in this embodiment, two or less or four or more air grooves 25 may be provided. Further, in the present embodiment, the annular close portion 24 forms an annular shape that is arranged at a constant height over the entire circumference when the lid 10 is in the closed position, while the annular region 23 forms the entire circumference. It has a cylindrical shape having an upper end edge having a constant height over the entire circumference and a lower end edge having a constant height over the entire circumference. However, the annular close portion 24 and the annular region 23 are not limited to such a shape.

According to this configuration, the lid 10 is opened and moved to the open position, and the double container 6 is shifted from the standing posture to the tilted posture, so that the contents can be dispensed from the pouring cylinder 8 by its own weight. it can. At this time, the moving valve body 11 moves upward (outlet side) due to its own weight and the pressure from the contents, and the contents are poured out through the gap between the diameter-reduced portion 17 and the plurality of ribs 16. In this way, the contents may be poured out only by its own weight, but by squeezing the body of the double container body 4, the contents can be poured out more vigorously. When the pouring of the contents is completed and the double container 6 is returned to the upright posture, the moving valve body 11 moves downward due to its own weight and the pressure from the contents, and comes into contact with the reduced diameter portion 17. By the downward movement of the moving valve body 11, the contents in the pouring cylinder 8 are pulled back to the inner side of the inner layer 8 (suction back function), and the occurrence of liquid dripping from the pouring cylinder 8 is suppressed. .. Then, when the lid 10 is closed toward the closing position with the contents remaining above the moving valve body 11 in contact with the reduced diameter portion 17, for example, up to the upper end position of the rib 16, the lid 10 is first closed. The annular close portion 24 of the above comes into contact with the annular region 23 of the pouring cylinder 8. At this time, in the portion of the annular region 23 excluding the air groove 25, the annular close portion 24 slides downward while being in close contact with the entire circumference, while between the air groove 25 and the annular close portion 24. Is formed an air passage. That is, the air in the pouring cylinder 8 is pressurized by the annular close portion 24 of the lid 10 sliding downward on the annular region 23 of the pouring cylinder 8. It can be released to the outside of the pouring cylinder 8 through the gap between the air groove 25 and the annular close portion 24. Therefore, since the increase in pressure in the dispensing cylinder 8 can be suppressed, the lid 10 can be easily moved to the closed position. Further, in the present embodiment, since the groove 18 is provided in the reduced diameter portion 17, even if the inside of the pouring cylinder 8 is in a slightly pressurized state when the lid 10 is closed, the content is affected by the pressure. Since the object is returned to the inner side of the inner layer 2 through the groove 18, the pressure of the pouring cylinder 8 is reduced.

Further, in the present embodiment, since the annular region 23 has a plurality of air grooves 25 only in the half circumference portion on the opposite side of the hinge 13, air can be effectively released. Further, in the present embodiment, the annular region 23 is configured to be in sliding contact with the annular close portion 24 over the entire circumference except for the plurality of air grooves 25, so that when the lid 10 is in the closed position. The sealability between the annular region 23 and the annular close portion 24 can be stably maintained.

Although various embodiments of the present invention have been described above, it goes without saying that the above description is merely an example of the embodiments of the present invention, and various modifications may be made as long as the gist of the invention is not deviated. No.

1 Double container cap 2 Inner layer 3 Outer layer 4 Double container body 5 Mouth part 6 Double container 7 Engagement cylinder 8 Injection cylinder 9 Top wall 10 Lid body 11 Moving valve body 12 Valve body holding part 13 Hinge 14 Sealing protrusion 15 Stepped part 16 Rib 17 Reduced diameter part 18 Groove 19 Outer wall 20 Top wall 21 Sealing cylinder wall 22 Pin 23 Ring area 24 Ring close part 25 Air groove O Central axis

Claims (4)

A double container cap attached to the mouth of a double container body including an inner layer body for accommodating the contents and an outer layer body for accommodating the inner layer body.
A pouring cylinder having a tubular inner peripheral surface that partitions the flow path of the contents,
A lid that can be moved between a closed position that covers the upper part of the dispenser and an open position that opens the upper part of the dispenser is provided.
The lid has an annular close portion that is in close contact with the lower end edge of a predetermined annular region on the inner peripheral surface of the dispensing cylinder at the closed position over the entire circumference.
It said annular region have a air grooves forming the passage of air between the annular closely portion upon movement of said lid to said closed position,
The pouring cylinder has a valve body holding portion that holds the moving valve body so as to be movable up and down below the annular region.
The valve body holding portion has a reduced diameter portion that regulates the downward movement of the moving valve body.
A groove is formed on the inner peripheral surface of the reduced diameter portion to return the contents in the dispensing cylinder to the inside of the inner layer body when the moving valve body comes into contact with the inner peripheral surface. Double container cap featuring. The lid can be moved from the open position to the closed position by bending the hinge.
The double container cap according to claim 1, wherein the annular region has the air groove only in a half circumference portion opposite to the hinge. The double container cap according to claim 1 or 2, wherein the annular region has a plurality of the air grooves. The double container cap according to any one of claims 1 to 3, wherein the valve body holding portion of the dispensing cylinder has a plurality of ribs that restrict the upward movement of the moving valve body.

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