JP2022110142A - discharge container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge container in which a plugged discharge cap can be easily removed from a mouth.

SOLUTION: A discharge container 100 includes: a container body 2; a discharge cap 3; a non-return valve 63; vertically extending multiple vertical ribs 19 each provided in an integrated manner to one of the outer peripheral surface of a mouth 11 and the inner peripheral surface of a side wall part 42; and a screw part 48 that is provided in an integrated manner to the other of the outer peripheral surface of the mouth 11 and the inner peripheral surface of the side wall part 42, which moves along a screw 19a and applies an upward directed push-up force on the discharge cap 3 when it bites into the multiple vertical ribs 19 and transfers the screw 19a to the vertical ribs 19 and the discharge cap 3 makes a relative rotation against the mouth 11.

SELECTED DRAWING: Figure 8

COPYRIGHT: (C)2022,JPO&INPIT

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge container comprising a double structure container body having an outer layer body and an inner layer body, and a discharge cap attached to the mouth of the container body.

Conventionally, as a container for containing cosmetics such as lotion, shampoo, rinse, liquid soap, food seasoning, medicine, etc., a double-structured container body having an outer layer body and an inner layer body, and a container body A discharge container is known which includes a discharge cap attached to the mouth of the container and discharges contents from a discharge port provided in the discharge cap.

The container body of such a discharge container is provided with an outside air inlet for introducing outside air between the outer layer body and the inner layer body. A check valve is provided for opening and closing the flow path of the contents so as to allow the contents to flow out and prevent the contents and the outside air from flowing into the inner layer body from the discharge port. When the contents are discharged from the outer layer body, the check valve prevents the inflow of outside air from the discharge port into the inner layer body, and introduces outside air between the outer layer body and the inner layer body through the outside air introduction port. Only the inner layer body can be reduced and deformed while maintaining its shape. As a result, the content contained in the inner layer body is discharged without being replaced with the outside air, thereby making it difficult for the content remaining inside the inner layer body to come into contact with the air, thereby suppressing deterioration and deterioration thereof. can be done.

In addition, as the above-described discharge container, an unsealable cap is used for the purpose of obtaining a higher tamper-proof effect than a screw-type discharge cap provided with a female screw portion that engages with a male screw portion provided on the outer peripheral surface of the mouth. There is known a device that employs a plugging type discharge cap that is difficult to reattach later (see, for example, Patent Document 1).

JP 2016-69039 A

Discharge containers in which the container body and the discharge cap are made of different materials, such as a polyethylene terephthalate container body with a polypropylene or polyethylene discharge cap attached to the mouth, should be recycled ( When reusing, it is required to remove the discharge cap from the container body and separate them.

On the other hand, in order to obtain a high tamper-proof effect even for such a discharge container, it is required to employ a capping type discharge cap. However, since it is difficult to remove the stopper type discharge cap from the mouth, there is a problem that the separation work of the discharge cap is complicated when recycling the container body.

SUMMARY OF THE INVENTION An object of the present invention is to solve such problems, and an object of the present invention is to provide a discharge container in which a stoppered discharge cap can be easily removed from the mouth. .

A discharge container according to the present invention includes an outer layer body and a volume-reducing and deformable inner layer body housed inside the outer layer body, and an outside air inlet communicating between the outer layer body and the inner layer body. A container body having a double structure, a top wall portion provided with a discharge port for contents, and a cylindrical side wall portion connected to the top wall portion. and a check valve provided inside the discharge cap for opening and closing a flow path of contents toward the discharge port, wherein the outer peripheral surface of the mouth portion or the A plurality of vertical ribs integrally provided on one of the inner peripheral surfaces of the side wall portions and extending in the vertical direction, and integrally provided on the other of the outer peripheral surface of the mouth portion and the inner peripheral surface of the side wall portions. It bites into the plurality of vertical ribs to transfer threads to the vertical ribs, and when the discharge cap rotates relative to the mouth, it moves along the threads and is directed upward toward the discharge cap. and a threaded portion for applying a pushing force.

In the discharge container of the present invention having the above configuration, it is preferable that the discharge cap is made of a synthetic resin material that is softer than the container body.

In the discharge container of the present invention, the container body is a polyethylene terephthalate blow-molded product formed by blow-molding a preform assembly in which an inner preform is incorporated inside an outer preform. is preferred.

In the discharge container of the present invention having the above structure, it is preferable that the discharge cap is made of polypropylene or polyethylene.

In the discharge container of the present invention having the above configuration, it is preferable that the discharge cap is made of a synthetic resin material harder than the container body.

In the discharge container of the present invention, in the configuration described above, the container body is preferably a blow-molded article made of low-density polyethylene, which is formed by extrusion blow-molding a parison having a laminated structure.

In the discharge container of the present invention having the above structure, it is preferable that the discharge cap is made of polypropylene.

In the discharge container of the present invention having the above configuration, it is preferable that the outside air introduction port is provided in the mouth portion.

In the above configuration, the discharge container of the present invention is provided with an annular mouth side seal portion provided on the outer peripheral surface of the mouth portion below the outside air introduction port and on the inner peripheral surface of the side wall portion, an annular cap-side seal portion that abuts on the mouth-side seal portion over the entire circumference to seal between the side wall portion and the mouth portion; and an outside air vent provided in the top wall portion. It is preferable to have more.

In the discharge container of the present invention having the above configuration, it is preferable that the outside air introduction port is provided at the bottom portion of the container body.

According to the present invention, it is possible to provide a discharge container in which a stoppered discharge cap can be easily removed from the mouth.

BRIEF DESCRIPTION OF THE DRAWINGS It is a partially notched front view of the discharge container which is the 1st Embodiment of this invention. FIG. 2 is an enlarged cross-sectional view of a main part of the discharge container shown in FIG. 1; 3 is a cross-sectional view of the discharge cap shown in FIG. 2; FIG. FIG. 3 is a partially cutaway front view of the preform assembly; 3 is a cross-sectional view of the discharge container shown in FIG. 1 in a state in which the discharge cap is rotated relative to the mouth. FIG. 2 is a cross-sectional view showing a modification of the discharge container shown in FIG. 1, in which an outside air introduction port is opened between the upper end of the outer port and the upper end of the inner port; FIG. It is a modification of the discharge container shown in FIG. 1, Comprising: It is sectional drawing which shows the case where the mouth part side engaging part and the said mouth part side sealing part are separately provided. FIG. 6 is an enlarged cross-sectional view of a main part of a discharge container that is a second embodiment of the present invention; FIG. 11 is a partially cutaway front view of a discharge container according to a third embodiment of the present invention; FIG. 10 is an enlarged cross-sectional view of a main part of the discharge container shown in FIG. 9;

Hereinafter, the present invention will be described more specifically by way of example with reference to the drawings.

As shown in FIG. 1, a discharge container 1 according to the first embodiment of the present invention is of a squeeze type used for containing a food seasoning such as soy sauce as a content (content liquid). A container body 2 and a discharge cap 3 are provided.

In the present specification and the scope of claims, the up-down direction refers to the vertical direction when the discharge container 1 is in an upright position with the discharge cap 3 positioned above the container body 2, as shown in FIG. A radial direction means a direction along a straight line passing through the axis O of the discharge container 1 and perpendicular to the axis O. As shown in FIG.

The container body 2 is also called a delamination container, and has a double structure including an outer layer body 10 and an inner layer body 20 housed inside the outer layer body 10 .

The outer layer body 10 is a portion that constitutes the outer shell of the container body 2, and is bottle-shaped including a cylindrical outer mouth portion 11 and a bottomed cylindrical body portion 12 integrally connected to the lower end of the outer mouth portion 11. It has become.

A plurality of outside air introduction ports 13 are provided in the outer port portion 11 . These outside air introduction ports 13 are elongated through-holes extending in the circumferential direction while passing through the outer port portion 11 in the radial direction, and are provided at predetermined intervals in the circumferential direction. A plurality of outside air introduction ports 13 communicate between the outer layer body 10 and the inner layer body 20 respectively, and outside air can be introduced between the outer layer body 10 and the inner layer body 20 through these outside air introduction ports 13 . .

As long as at least one outside air introduction port 13 is provided, the number can be arbitrarily set.

A neck ring 14 is integrally provided at the lower end of the outer opening 11 . The neck ring 14 extends in an annular shape over the entire circumference of the outer opening 11 and protrudes radially outward from the outer peripheral surface of the outer opening 11 .

The trunk portion 12 has a shoulder-like portion 12a that is integrally connected to the lower end of the outer opening portion 11, gradually expands in diameter downward, and protrudes radially outward with respect to the outer opening portion 11, and a shoulder-like portion. It has a substantially cylindrical trunk body portion 12b that is integrally connected to the lower end of the trunk portion 12a and has a slightly constricted portion, and a bottom portion 12c that closes the lower end of the trunk body portion 12b.

The trunk body portion 12b is flexible, and when squeezed (pressed), it can be elastically deformed and dented radially inward. It can restore itself. Since the trunk body portion 12b is configured to be elastically deformable by squeezing, the contents can be easily discharged, and after the contents are discharged, the trunk body portion 12b can easily return to its original shape. , the outside air is reliably introduced through the outside air inlet 13 between the outer layer body 10 and the inner layer body 20, so that the container body 2 can reliably exhibit its function as a delamination container. can.

A plurality of (eighteen) concave ribs 15 extending in the vertical direction are arranged at equal intervals along the entire circumference of the shoulder-like portion 12a. In addition, in FIG. 1, for convenience, only one concave rib 15 is denoted by a reference numeral. By providing a plurality of recessed ribs 15 in the shoulder-shaped portion 12a, the inner layer body 20 can be easily separated from the outer layer body 10 at the shoulder-shaped portion 12a, and the outside air introduced from the outside air introduction port 13 can be removed from the trunk body portion 12b. can be reliably distributed to It should be noted that a configuration in which the recessed rib 15 is not provided is also possible.

As shown in FIG. 1, the inner layer body 20 has an inner mouth portion 21 and a housing portion 22 .

As shown in FIG. 2 , the inner opening 21 has a cylindrical shape with a diameter smaller than that of the outer opening 11 , and is arranged inside the outer opening 11 coaxially with the outer opening 11 . The outer mouth portion 11 and the inner mouth portion 21 constitute a cylindrical mouth portion of the container body 2 .

Between the inner peripheral surface of the outer opening 11 and the outer peripheral surface of the inner opening 21, a gap 23 is provided at a predetermined interval. A cylindrical enlarged diameter portion 24 is integrally provided at the upper end of the inner opening portion 21 , and the outer peripheral surface of the enlarged diameter portion 24 is in contact with the inner peripheral surface of the outer opening portion 11 over the entire circumference. A gap 23 between the outer opening portion 11 and the inner opening portion 21 is closed from the outside at the upper end portions of the outer opening portion 11 and the inner opening portion 21 . An annular flange portion 25 extending radially outward is provided integrally with the upper end of the enlarged diameter portion 24 , and the flange portion 25 contacts the upper end of the outer opening portion 11 so that the inner opening portion 21 becomes the outer opening portion. 11 are axially positioned.

As shown in FIG. 1 , the accommodating portion 22 is formed in a bag-like shape that is thinner than the body portion 12 , is integrally connected to the lower end of the inner opening portion 21 , and is detachably laminated on the inner surface of the body portion 12 . The inside of the containing portion 22 is a content containing space S, and the containing portion 22 can be filled with the contents through the inner opening portion 21 and the contents contained in the containing portion 22 through the inner opening portion 21. can be discharged to the outside. The containing portion 22 is freely deformable to reduce its volume, and can be deformed to reduce its volume (deformed to reduce the internal volume) while being separated from the inner surface of the body portion 12 as the contents are poured out. Along with the volume-reducing deformation of the housing portion 22, external air is introduced from the external air introduction port 13 into the space between the outer layer body 10 and the inner layer body 20, thereby maintaining or restoring the original shape of the trunk body portion 12b. Only the accommodating portion 22 can be easily peeled off from the inner surface of the trunk portion 12 and reduced in volume.

As shown in FIG. 2, longitudinal ribs 26 are integrally provided on the outer surface of the inner layer body 20 in order to secure an airway for the outside air from the outside air introduction port 13 to between the body portion 12 and the housing portion 22. ing. Although details are not shown, in the container body 2 of the present embodiment, a plurality of vertical ribs 26 are arranged on the outer surface of the inner layer body 20 at intervals in the circumferential direction corresponding to the respective outside air introduction ports 13 . is provided. Each vertical rib 26 protrudes radially outward from the outer surface of the inner layer body 20 and extends in the direction along the axis O from the inner opening portion 21 to the housing portion 22 . Between them, an outside air passage is formed that extends from the outside air introduction port 13 over the neck ring 14 to reach the portion between the shoulder-like portion 12a and the housing portion 22. - 特許庁As a result, the ventilation path for outside air introduced from the outside air introduction port 13 can be reliably introduced to between the shoulder-like portion 12 a and the accommodating portion 22 .

Note that the vertical ribs 26 may be provided on the inner peripheral surface of the outer opening 11 . Furthermore, it is also possible to adopt a configuration in which neither the outer opening portion 11 nor the inner opening portion 21 is provided with the vertical ribs 26 .

As shown in FIG. 2, the outer peripheral surface of the outer port portion 11 is integrally provided with a mouth portion side engaging portion 16 for retaining the discharge cap 3 so as not to come off. The mouth-side engaging portion 16 extends in an annular shape over the entire circumference of the outer mouth portion 11 and protrudes radially outward from the outer peripheral surface of the outer mouth portion 11 below the outside air introduction port 13 . ing.

In this embodiment, the mouth side engaging portion 16 also serves as the mouth side seal portion 17 .

Further, as shown in FIG. 2 , a male threaded portion 18 as a threaded portion is integrally provided on the outer peripheral surface of the outer opening portion 11 . The male screw portion 18 spirally protrudes radially outward from the outer peripheral surface of the outer opening portion 11 , and has a triangular cross-sectional shape with an acute radially outward tip.

Both the outer layer body 10 and the inner layer body 20 are made of polyethylene terephthalate resin (PET). By making the outer layer body 10 and the inner layer body 20 respectively made of polyethylene terephthalate resin, the container body 2 can be made lightweight, highly transparent, and highly recyclable.

The container body 2 configured as described above is a blow-molded product formed by blow-molding the preform assembly 30 shown in FIG. The preform assembly 30 is a double structure in which an inner preform 32 made of polyethylene terephthalate resin for forming the inner layer 20 is incorporated inside an outer preform 31 made of polyethylene terephthalate resin for forming the outer layer 10 . It has a structure.

The outer preform 31 is formed by injection-molding polyethylene terephthalate resin using an injection molding die, thereby connecting the outer opening 11 having the same shape as the outer opening 11 of the outer layer body 10 and the lower end of the outer opening 11 to be blow-molded. It is formed in a substantially test tube shape having a bottomed cylindrical extension portion 31a that is extended by the . Since the outer preform 31 has the outer opening 11 of the same shape as the outer layer body 10, the same reference numerals as in FIG. There is.

The inner preform 32 is formed by injection-molding polyethylene terephthalate resin using an injection molding die so that the inner opening portion 21 having substantially the same shape as the inner opening portion 21 of the inner layer body 20 and the lower end of the inner opening portion 21 are connected to each other. It is formed in a substantially test tube shape having a bottomed cylindrical extension portion 32a that is extended by molding. In addition, since the inner preform 32 has an inner opening 21 having the same shape as the inner layer body 20, the same reference numerals as in FIG. There is.

By blow molding the preform assembly 30 having such a configuration, the container body 2 shown in FIG. 1 can be formed. In this embodiment, biaxial stretch blow molding is employed as blow molding.

Next, the configuration of the ejection cap 3 will be described.

The discharge cap 3 is made of polypropylene, and includes a cap body 40 and a lid body 50 as shown in FIG. Note that the discharge cap 3 may be made of polyethylene.

The cap body 40 is formed in a substantially topped cylindrical shape having a top wall portion 41 and a cylindrical side wall portion 42 integrally connected to the outer peripheral edge of the top wall portion 41. The side wall portion 42 serves as an outer opening. The top wall portion 41 is attached to the outer mouth portion 11 so as to cover the outer periphery of the portion 11 and cover the open end of the outer mouth portion 11 .

A cap side engaging portion 43 is provided on the inner peripheral surface of the lower end portion of the side wall portion 42 . The cap-side engaging portion 43 is formed in a projecting shape protruding radially inward from the inner peripheral surface of the side wall portion 42 , and when the discharge cap 3 is plugged onto the outer opening portion 11 , the outer opening portion 11 is closed. The discharge cap 3 is undercut-engaged with the mouth-side engaging portion 16 provided on the outer peripheral surface of the discharge cap 3 to be retained on the outer mouth portion 11 without coming off. In this manner, the discharge cap 3 is configured to be attached to the outer opening 11 by plugging.

Note that the cap-side engaging portion 43 may be formed in an annular shape extending over the entire circumference of the side wall portion 42, or may be formed by dividing into a plurality of portions arranged intermittently in the circumferential direction.

The upper surface of the top wall portion 41 is integrally provided with a discharge port 44 for the contents. The contents contained in the containing space S of the inner layer body 20 can be discharged to the outside through the discharge port 44 . In the present embodiment, the discharge port 44 is formed in a cylindrical shape that curves outward while gradually increasing in diameter from the top wall portion 41 upward. Various changes are possible according to the contents contained in the S, the application, and the like.

A portion of the inner peripheral surface of the side wall portion 42 on the upper side of the cap-side engagement portion 43 serves as a cap-side seal portion 45 . The cap-side seal portion 45 abuts on the outer peripheral end of the mouth-side seal portion 17 (mouth-side engaging portion 16 ) over the entire circumference, and hermetically seals the space between the side wall portion 42 and the outer mouth portion 11 . ing. That is, the lower end portion of the side wall portion 42 of the cap body 40 is sealed from the outside.

A vent 46 is provided in the top wall portion 41 , and outside air can be taken into the cap main body 40 from the outside through the vent 46 and supplied to the outside air introduction port 13 .

The lid body 50 is formed in a truncated cylindrical shape having substantially the same diameter as the cap body 40 , and is connected to the cap body 40 via a hinge 51 at a part of the outer peripheral surface so as to be openable and closable. The lid body 50 has a tubular plug member 53 integrally provided on the inner surface of the top wall 52 thereof. , and the discharge port 44 is closed. A cylindrical projection 54 is provided on the inner surface of the top wall 52 to cover the outside of the plug member 53 . The lid body 50 covers the top wall portion 41 of the cap body 40 by undercutting engagement with the outer peripheral edge of the top wall portion 41 in a locking groove 55 provided on the inner periphery of the opening edge of the lid body 50 . state.

On the other hand, when the cover 50 is at the open position indicated by the two-dot chain line in FIG. 1, the plug member 53 is separated from the discharge port 44, and the discharge port 44 is opened to discharge the contents.

An inner plug 60 is attached to the inside of the cap body 40 . The inner plug 60 is attached to the open end of the inner opening 21 and covers the open end. A cylindrical engagement wall 61 is integrally formed on the outer peripheral edge of the inner plug 60, and the upper end of the engagement wall 61 contacts the lower surface of the top wall portion 41 of the cap body 40. Thus, a predetermined space is provided between the inner plug 60 and the top wall portion 41 .

The inner plug 60 is provided with an outflow hole 62 for the contents. The outflow hole 62 communicates with the discharge port 44 through the space between the inner plug 60 and the top wall portion 41 , and the contents stored in the storage space S flow through the outflow hole 62 to the discharge port. 44.

A check valve 63, a leg portion 63a, and an annular wall 64 constitute a discharge valve. The check valve 63 is formed in a plate shape (disk shape), and is arranged on the upper surface of the inner plug 60 facing the top wall portion 41 to close the outflow hole 62 . The annular wall 64 is formed in a cylindrical shape, is arranged between the top wall portion 41 and the inner plug 60 , and is fitted to the top wall portion 41 and the inner plug 60 . The check valve 63 is connected to the annular wall 64 by a plurality of elastically deformable legs 63a. As a result, the check valve 63 moves toward and away from the upper surface of the inner plug 60 to allow the contents to flow out from the accommodation space S toward the discharge port 44 and to accommodate the contents from the discharge port 44 . The outflow hole 62 is opened and closed so as to block the inflow of contents and outside air toward the space S.

The space between the top wall portion 41 and the inner plug 60 is partitioned into a liquid channel inside the annular wall 64 and a gas channel outside the annular wall 64 .

The inner plug 60 is provided with a cylindrical wall 65 extending toward the housing space S, located on the side opposite to the hinge 51 with respect to the outflow hole 62 . The lower end of the cylindrical wall 65 is tapered so that the inner diameter becomes narrower as it goes downward, and inside the cylindrical wall 65 is a valve body 66 formed in a spherical shape (ball) made of steel, resin, or the like in the vertical direction. are movably arranged in the

When the container body 2 is tilted with the discharge port 44 facing downward, the valve body 66 moves inside the cylindrical wall 65 toward the discharge port 44 as indicated by the broken line in FIG. . After the contents have been poured out, when the container main body 2 is returned to the upright posture so that the discharge port 44 faces upward, the valve body 66 directs the inside of the cylindrical wall 65 downward to the diameter-reduced portion. (the position indicated by the solid line in FIG. 2), and the contents remaining in the discharge port 44 are sucked toward the inside of the cylindrical wall 65 (the top wall 41, the check valve 63, and the annular wall 64). As a result, the remaining amount of liquid inside the ejection port 44 can be reduced, and the liquid dripping from the ejection port 44 can be prevented. Thus, the valve body 66 functions as a suck-back mechanism for preventing dripping from the discharge port 44 .

An air check valve 67 for opening and closing the vent 46 is integrally provided on the outer peripheral surface of the annular wall 64 . The air check valve 67 allows outside air to enter the inside of the cap body 40 from the vent 46 and prevents air from flowing out from the inside of the cap body 40 to the outside through the vent 46 . Function. Therefore, when squeezing the body portion 12b of the container body 2 to discharge the contents, air is retained between the outer layer 10 and the inner layer 20 to easily push out the contents from the inner layer 20. can be done. Further, when the squeezing of the barrel main body portion 12b is released after the contents are discharged, the inner layer 20 is removed so that the outside air is introduced between the outer layer 10 and the inner layer 20 through the air inlet 46 and the outside air introduction port 13. The barrel body portion 12b of the outer layer body 10 can be restored to its original shape while being reduced in volume and deformed. As a result, after the content is ejected, it is housed in the storage space S of the inner layer body 20 while preventing outside air from flowing into the inner layer body 20 from the ejection port 44 as the barrel main body portion 12b is restored. The deterioration of the quality can be suppressed by making the contents difficult to come into contact with the air.

As shown in FIG. 3 , a plurality of vertical ribs 47 are integrally provided on the inner peripheral surface of the side wall portion 42 of the cap body 40 . The plurality of vertical ribs 47 are arranged at equal intervals in the circumferential direction, protrude radially inward from the inner peripheral surface of the side wall portion 42 , and extend vertically (vertically). Further, the lower end of each vertical rib 47 is gently inclined so that the protrusion height is gradually reduced.

The diameter of the virtual circle passing through the radially inner tip portions of the plurality of vertical ribs 47 is greater than the diameter of the virtual circle passing through the radially outer tip portions of the male threaded portions 18 formed on the outer peripheral surface of the outer opening 11 . When the discharge cap 3 is plugged onto the outer port portion 11, the male screw portion 18 moves to a predetermined position while elastically deforming the plurality of vertical ribs 47. As shown in FIG. Then, as shown in FIG. 2, when the discharge cap 3 is plugged into the outer opening portion 11 and held in the outer opening portion 11, the male screw portion 18 bites into the plurality of vertical ribs 47. As shown in FIG. The internal threads 47 a are transferred to the plurality of vertical ribs 47 .

In particular, in the present embodiment, the discharge cap 3 is made of polypropylene, which is softer than the outer opening 11 made of polyethylene terephthalate. Thus, the internal threads 47a can be reliably transferred to the vertical ribs 47 made of polypropylene integrally formed with the discharge cap 3. As shown in FIG.

In the discharge container 1 of the present embodiment, the discharge cap 3 is attached to the mouth portion (outer mouth portion 11) of the container body 2 by plugging. A male screw (threaded portion) 18 is provided, and a plurality of vertical ribs 47 are provided on the inner peripheral surface of the side wall portion 42 of the discharge cap 3 so that when the discharge cap 3 is plugged into the outer port portion 11, the male threaded portion 18 is formed. bit into a plurality of vertical ribs 47 and transfer the internal thread 47a to each of the vertical ribs 47, the discharge cap 3 can be easily operated by rotating the discharge cap 3 relative to the outer port portion 11. 3 can be easily removed from the outer opening 11 of the container body 2 .

That is, as shown in FIG. 2, when the discharge cap 3 is attached to the outer opening 11 of the container body 2, the female threads 47a are transferred to the plurality of vertical ribs 47 by biting the male threads 18 into them. Therefore, when the discharge cap 3 is rotated relative to the outer opening 11 from this state, the male threaded portion 18 moves along the female thread 47a and faces upward toward the discharge cap 3, as shown in FIG. A lifting force is applied. That is, the male screw 8 bites into the plurality of vertical ribs 47 and the female screw 47a is transferred to the inner peripheral surface of the side wall portion 42, so that the discharge cap 3 is simply screwed to the male screw portion 18. By rotating the discharge cap 3 relative to the outer port portion 11 in a direction in which the screw connection is loosened, the discharge cap 3 can be pushed upward relative to the outer port portion 11 . By pushing up the discharge cap 3 relatively upward with respect to the outer mouth portion 11 , the cap-side engaging portion 43 provided on the discharge cap 3 is engaged with the mouth portion side provided on the outer mouth portion 11 . The joint portion 16 is overcome and the undercut engagement of the cap-side engaging portion 43 with the mouth-side engaging portion 16 is released, and the discharge cap 3 is removed from the outer opening portion 11 . In FIG. 5, only the internal threads 47a transferred to one vertical rib 47 are denoted by reference numerals for the sake of convenience.

As described above, according to the discharge container 1 of the present embodiment, the discharge cap 3 can be removed from the outer mouth portion 11 of the container body 2 by a simple operation of rotating the discharge cap 3 relative to the outer mouth portion 11 . Can be easily removed. Therefore, it is possible to easily remove the discharge cap 3 from the outer mouth portion 11 of the container body 2 while having a structure having a high tamper-proof effect that the discharge cap 3 is attached to the outer mouth portion 11 of the container body 2 by plugging. This makes it easier to separate the discharge cap 3 from the container body 2 when recycling the container body 2 made of polyethylene terephthalate resin.

In addition, in the discharge container 1 of the present embodiment, the lower end of the cap main body 40 is sealed by the mouth-side seal portion 17 and the cap-side seal portion 45 , and the air passes through the vent hole 46 provided in the top wall portion 41 of the cap main body 40 . Since the outside air is introduced through the outside air introduction port 13, introduction of contents, foreign matter, etc. between the outer layer body 10 and the inner layer body 20 through the outside air introduction port 13 is suppressed, and the contents are discharged. The housing portion 22 of the inner layer body 20 can be reliably separated from the trunk portion 12 of the outer layer body 10 when the inner layer body 20 is pressed.

Furthermore, in the discharge container 1 of the present embodiment, the male threaded portion 18 is provided above the mouth-side engagement portion 16, and the cap-side seal portion 45 is provided above the cap-side engagement portion 43. , the inside of the cap body 40 can be reliably airtightly sealed, and the male screw portion 18 is transferred to the plurality of vertical ribs 47 by the female screw 47a when the discharge cap 3 is rotated relative to the outer port portion 11. , and the cap-side engaging portion 43 can be provided at the lower end side portion of the side wall portion 42 where the diameter expansion deformation is likely to occur. Undercut engagement with 16 can be easily released. This makes it possible to more easily remove the discharge cap 3 from the outer opening 11 of the container body 2 .

Furthermore, in the discharge container 1 of the present embodiment, the mouth-side engagement portion 16 is configured to also serve as the mouth-side seal portion 17, so that the height dimension of the outer mouth portion 11 can be reduced. , the discharge container 1 can be made smaller and lighter.

Further, in the discharge container 1 of the present embodiment, a plurality of vertical ribs 47 are provided on the inner peripheral surface of the side wall portion 42 of the discharge cap 3, and the mouth portion of the container main body 2 is provided with the male screw portion 18 as a screw portion. In this configuration, the discharge cap 3 is made of a synthetic resin material that is softer than the container body 2, so that when the discharge cap 3 is plugged into the outer opening 11, the male threaded portion 18 is formed into a plurality of vertical threads. By effectively biting into the rib 47, the internal thread 47a can be reliably transferred to the vertical rib 47. - 特許庁In particular, when the container body 2 is a blow-molded product made of polyethylene terephthalate, and the discharge cap 3 is made of polypropylene or polyethylene, when the discharge cap 3 is plugged into the outer opening 11, The male screw portion 18 can be made to bite into the plurality of vertical ribs 47 more effectively, and the female screw 47a can be transferred to the vertical ribs 47 more reliably.

FIG. 6 is a cross-sectional view showing a modification of the discharge container 1 shown in FIG. 1, in which the outside air introduction port 13 is opened between the upper end of the outer port portion 11 and the upper end of the inner port portion 21. As shown in FIG. . In FIG. 6, members corresponding to the members described above are denoted by the same reference numerals.

In the discharge container 1 shown in FIG. 1, the outside air introduction port 13 is configured as a through hole penetrating the outer port portion 11 in the radial direction. If provided in the mouth portion 11 and the inner mouth portion 21), as shown in FIG. In the illustrated case, the outside air introduction port 13 is formed by a groove portion 70 having a predetermined width extending over the outer peripheral surface of the enlarged diameter portion 24 of the inner mouth portion 21 of the inner layer body 20 and the lower surface of the flange portion 25 . there is A plurality of grooves 70 may be provided in the circumferential direction of the mouth of the container body 2 .

With such a configuration, it is possible to provide the male threaded portion 18 on the outer peripheral surface of the outer port portion 11 without considering interference with the outside air introduction port 13, and the arrangement of the male threaded portion 18 on the outer peripheral surface of the outer port portion 11 In addition, the outer layer body 10 can be easily formed, and the manufacturing cost of the discharge container 1 can be reduced by eliminating the need to provide a through hole penetrating in the radial direction in the outer port portion 11.

The groove portion 70 is provided on the inner peripheral surface and upper end surface of the outer opening portion 11 of the outer layer body 10 instead of the outer peripheral surface of the enlarged diameter portion 24 of the inner opening portion 21 of the inner layer body 20 and the lower surface of the flange portion 25. Alternatively, in addition to the outer peripheral surface of the enlarged diameter portion 24 of the inner opening portion 21 of the inner layer body 20 and the lower surface of the flange portion 25, the inner peripheral surface and the upper end surface of the outer opening portion 11 of the outer layer body 10 may be provided with can be

FIG. 7 is a cross-sectional view showing a modification of the discharge container 1 shown in FIG. 1, in which the mouth-side engaging portion 16 and the mouth-side sealing portion 17 are provided separately. In FIG. 7, members corresponding to the members described above are denoted by the same reference numerals.

In the discharge container 1 shown in FIG. 1, the mouth-side engaging portion 16 also serves as the mouth-side sealing portion 17, and the mouth-side engaging portion 16 and the mouth-side sealing portion 17 are integrated. formed. On the other hand, in the modified example shown in FIG. 7 , the mouth side engaging portion 16 is provided above the mouth side seal portion 17 separately from the mouth side seal portion 17 . Also, the cap-side seal portion 45 is provided below the cap-side engaging portion 43 . Also in this case, the male threaded portion 18 is provided above the mouth-side engagement portion 16 and the mouth-side seal portion 17 .

With such a configuration, the mouth-side engaging portion 16 and the cap-side engaging portion 43 have a shape suitable for mutual engagement, and the mouth-side seal portion 17 and the cap-side seal portion 45 are brought into close contact with each other. , the cap-side engaging portion 43 is reliably engaged with the mouth-side engaging portion 16 to firmly hold the discharge cap 3 to the outer mouth portion 11 of the container body 2, and the mouth-side seal is formed. The portion 17 and the cap-side seal portion 45 can be brought into close contact with each other to reliably seal the space between the cap main body 40 and the outer opening portion 11 .

FIG. 8 is an enlarged cross-sectional view of a main part of a discharge container 100 according to a second embodiment of the invention. In FIG. 8, the same reference numerals are given to the members corresponding to the members described above.

In the discharge container 1 of the first embodiment shown in FIG. A male screw (threaded portion) 18 is integrally provided on the outer peripheral surface of the container body 2, but as in the discharge container 100 of the second embodiment shown in FIG. 11 may be integrally provided with a plurality of vertical ribs 19, and the inner peripheral surface of the side wall portion 42 of the discharge cap 3 may be integrally provided with a female threaded portion 48 as a threaded portion.

In the discharge container 100 of the second embodiment, the plurality of vertical ribs 19 are arranged at equal intervals in the circumferential direction, protrude radially outward from the outer peripheral surface of the outer port portion 11, and extend upward and downward. It extends in the direction (longitudinal direction). Also, the upper end of each vertical rib 19 is gently inclined so that the height of the protrusion gradually decreases.

On the other hand, the female screw portion 48 spirally protrudes radially inward from the inner peripheral surface of the side wall portion 42 and has a triangular cross-sectional shape with an acute radially inward tip.

In the discharge container 100 of the second embodiment, the diameter of an imaginary circle passing through the distal end portions on the radially outer side of the plurality of vertical ribs 19 is equal to the diameter of the female screw portion 48 formed on the inner peripheral surface of the side wall portion 42. It is larger than the diameter of the imaginary circle passing through the radially inner tip portion, and when the discharge cap 3 is plugged onto the outer port portion 11, the female screw portion 48 elastically deforms the plurality of vertical ribs 19. while moving to a predetermined position. Then, when the discharge cap 3 is pushed into a predetermined position of the outer opening 11 by plugging, the female screw portion 48 bites into the plurality of vertical ribs 19, and the female screw 19a is transferred to the plurality of vertical ribs 19. be done.

Therefore, like the discharge container 1 of the first embodiment, the container main body 2 can be dispensed by a simple operation of rotating the discharge cap 3 attached to the outer opening 11 relative to the outer opening 11 . can be easily removed from the outer opening 11 of the

Like the discharge container 100 of the second embodiment, a plurality of vertical ribs 19 are integrally provided on the outer mouth portion 11 of the outer layer body 10 of the container body 2, and the inner peripheral surface of the side wall portion 42 of the discharge cap 3 is provided with ribs 19. When the female threaded portion 48 as the threaded portion is provided integrally, the discharge cap 3 is preferably made of a synthetic resin material that is harder than the container body 2 . For example, in the discharge container 100 of the second embodiment, the container body 2 is a low-density polyethylene (LDPE) blow-molded product formed by extrusion blow molding (EBM) of a parison having a laminated structure. and the discharge cap 3 is made of polypropylene.

By making the discharge cap 3 made of a synthetic resin material harder than the container body 2 in this way, when the discharge cap 3 is plugged onto the outer opening 11, a plurality of female screw portions 48 are formed. The internal thread 19a can be reliably transferred to the vertical rib 19 by effectively biting into the vertical rib 19 of the internal thread. In particular, when the container body 2 is a blow-molded product made of low-density polyethylene as described above and the discharge cap 3 is made of polypropylene as described above, when the discharge cap 3 is capped on the outer opening 11, the female screw portion 48 can be effectively bitten into by the plurality of vertical ribs 19, so that the internal thread 19a can be transferred to the vertical ribs 19 more reliably.

Conversely, even if the container body 2 is a low-density polyethylene blow-molded product formed by extrusion blow molding a parison having a laminated structure, the outer mouth portion of the outer layer body 10 of the container body 2 A plurality of longitudinal ribs 19 are integrally provided on the discharge cap 11, and a female threaded portion 48 as a threaded portion is integrally provided on the inner peripheral surface of the side wall portion 42 of the discharge cap 3. In the configuration in which the discharge cap 3 is attached to the portion 11 by tapping, the discharge cap 3 can be easily removed from the outer opening portion 11 of the container body 2 by a simple operation of rotating relative to the outer opening portion 11. can be configured.

Like the discharge container 100 of the second embodiment, discharge is achieved by undercutting the mouth-side engaging portion 16 and the cap-side engaging portion 43 between the container body 2 and the discharge cap 3 . It is also possible to adopt a configuration in which no locking structure for locking the cap 3 to the container body 2 is provided. Also in this configuration, when the discharge cap 3 is plugged onto the outer mouth portion 11 , the female screw portion 48 bites into the plurality of vertical ribs 19 , thereby locking the discharge cap 3 to the outer mouth portion 11 of the container body 2 . can be held by the outer opening 11.

The female thread portion 48 preferably has a shape (for example, saw blade thread) in which the flank angle of one thread side facing the top wall portion 41 is smaller than the flank angle of the other thread side. With this configuration, the female threaded portion 48 that is inserted into the plurality of vertical ribs 19 when the discharge cap 3 is plugged into the outer port portion 11 is effectively locked by the female thread 19a that is transferred to the vertical ribs 19. As a result, the discharge cap 3 can be held on the outer port portion 11 more firmly. In particular, the discharge cap 3 is locked to the container main body 2 by undercut engaging the mouth side engaging portion 16 and the cap side engaging portion 43 between the container main body 2 and the discharge cap 3 . When the structure is not provided, the ejection cap 3 can be held more firmly on the outer opening portion 11 to prevent the ejection cap 3 from unexpectedly falling off from the outer opening portion 11 .

9 is a partially cutaway front view of a discharge container according to a third embodiment of the present invention, and FIG. 10 is an enlarged cross-sectional view of the essential parts of the discharge container shown in FIG. 9 and 10, members corresponding to the members described above are denoted by the same reference numerals.

In the discharge container 100 of the second embodiment shown in FIG. 8, the external air introduction port 13 is provided in the outer opening 11 of the container body 2. However, the discharge container of the third embodiment shown in FIG. As shown in 200, the outside air introduction port 13 may be provided in the bottom portion 12c of the body portion 12 of the container body 2.

In the discharge container 200 of the third embodiment, similarly to the discharge container 100 of the second embodiment, the container body 2 is a low-density polyethylene blow-molded product formed by extrusion blow molding. The discharge cap 3 is made of polypropylene.

The bottom portion 12c of the container body 2 is provided with a pinch-off portion 12d by cutting out the laminated parison with a mold during extrusion blow molding. A slit-shaped outside air introduction port 13 is provided in a part of the pinch-off portion 12d. The slit-shaped outside air introduction port 13 communicates between the outer layer body 10 and the inner layer body 20 .

When the barrel main body portion 12b is squeezed and the contents are discharged, the outside air introduction port 13 blocks the flow of air from between the outer layer body 10 and the inner layer body 20 to the outside with moderate resistance. On the other hand, when the barrel main body portion 12b is released from squeezing after the contents are discharged, the outside air introduction port 13 is closed from the outside between the outer layer body 10 and the inner layer body 20 as the shape of the outer layer body 10 is restored. Introduce outside air.

As shown in FIG. 10, in the discharge container 200 according to the third embodiment, since the outside air introduction port 13 is not provided in the outer opening 11 of the container body 2, the outer opening 11 has a mouth side seal portion 17. is not provided, and the discharge cap 3 is not provided with the cap-side seal portion 45 . Further, in the discharge container 200 according to the third embodiment, similarly to the discharge container 100 according to the second embodiment, between the container main body 2 and the discharge cap 3, the mouth side engaging portion 16 and the A locking structure for locking the discharge cap 3 to the container body 2 by undercutting the cap-side engaging portion 43 is not provided. Furthermore, in the discharge container 200 of the third embodiment, since the outside air inlet 13 is not provided in the outer opening 11 of the container body 2, the top wall 41 of the discharge cap 3 is not provided with the vent 46. do not have.

As described above, in the discharge container 200 of the third embodiment, the structure of the container body 2 and the discharge cap 3 is simplified by providing the outside air introduction port 13 in the bottom portion 12c of the container body 2. , the cost of the discharge container 200 can be reduced. Also, the height of the discharge container 200 can be reduced by reducing the height of the mouth.

In the discharge container 200 of the third embodiment, the inner plug 60 is not provided, and the outflow hole 62 and the tubular wall 65 are integrally provided in the top wall portion 41 . The outflow hole 62 is arranged inside the cylindrical wall and communicates with the housing space S through the cylindrical wall 65 . The check valve 63 is composed of a spherical valve body 66 arranged inside the cylindrical wall 65 .

When the discharge container 200 is in an upright posture, the valve body 66 is positioned at the lower end of the cylindrical wall 65 by its own weight and abuts against the tapered valve seat 65a of the cylindrical wall 65 over the entire circumference. The flow of contents or air from the discharge port 44 side to the housing space S side is blocked. On the other hand, when the discharge container 1 is in an inverted position and the barrel portion 12 is squeezed, the valve body 66 moves inside the cylindrical wall 65 in the direction away from the valve seat 65a, and is directed from the housing space S toward the discharge port 44. flow of contents is allowed. A protrusion 65 b is provided on the upper end side of the cylindrical wall 65 to prevent the valve body 66 from slipping out of the cylindrical wall 65 .

As described above, in the discharge container 200 of the third embodiment, since the external air inlet 13 is provided in the bottom portion 12c of the container body 2, the structure of the discharge cap 3 or the check valve 63 can be further simplified. , and the cost of the discharge container 200 can be reduced.

When plugging the discharge cap 3 against the outer mouth portion 11 of the container body 2, the pressing force is set to 150 when the polypropylene discharge cap 3 is plugged onto the outer mouth portion 11 of the container body 2 made of low-density polyethylene. ~250 N, 300 to 350 N when the polypropylene discharge cap 3 is plugged on the outer mouth portion 11 of the container body 2 made of high-density polyethylene, and polypropylene made to the outer mouth portion 11 of the container body 2 made of polyethylene terephthalate. When plugging the discharge cap 3, it is preferable to set it to 200 to 300N. As a result, the discharge cap 3 can be securely held by the container body 2 to such an extent that the discharge cap 3 does not easily come off from the outer opening 11 of the container body 2 during normal use such as when the contents are discharged. The female threaded portion 48 can be bitten into the plurality of longitudinal ribs 19 with a strength that allows easy removal from the outer mouth portion 11 of the container body 2 . In particular, this configuration is such that the discharge cap 3 is connected to the container body 2 between the container body 2 and the discharge cap 3 like the discharge container 100 of the second embodiment and the discharge container 200 of the third embodiment. This is effective in the case where a locking structure is not provided by the mouth-side engaging portion 16 and the cap-side engaging portion 43 for stopping.

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

For example, in the above-described embodiment, the container body 2 is a delamination container, but the present invention is not limited to this. A double container is also possible.

In the first embodiment, the container body 2 (the outer layer 10 and the inner layer 20) or the preform assembly 30 (the outer preform 31 and the inner preform 32) are made of polyethylene terephthalate, and the discharge cap 3 is made of polypropylene. However, the material is not limited to this, as long as the container body 2 and the discharge cap 3 are formed of different materials, these materials can be changed in various ways. Similarly, in the second embodiment, the container body 2 is made of low-density polyethylene and the discharge cap 3 is made of polypropylene. If so, these materials can be changed in various ways.

Furthermore, in the first embodiment, the discharge cap 3 is made of polypropylene or polyethylene, but it is not limited to this. You can also In addition, in the second embodiment, the discharge cap 3 is made of polypropylene, but it is not limited to this, and may be made of other synthetic resin material as long as it is made of a synthetic resin material harder than low-density polyethylene resin. can also

Furthermore, in the above-described embodiment, the plurality of longitudinal ribs 19 and 47 have a shape extending vertically (longitudinal direction). Further, the vertical ribs 19 and 47 may be configured to have intermittent portions dividing the vertical ribs 19 and 47 in the vertical direction.

Furthermore, in the above-described embodiment, the lengths of the plurality of vertical ribs 19 and 47 are all the same length. The length of the vertical ribs 19, 47 may be longer than the length of the other vertical ribs 19, 47, so that the vertical ribs 19, 47 having different lengths may be mixed.

In this case, a predetermined number of vertical ribs 19 and 47 out of the plurality of vertical ribs 19 and 47 are set to reach a lower side than the other vertical ribs 19 and 47, and the discharge cap 3 is attached to the container main body 2. The female threaded portion 48 can be configured such that when it is plugged into the mouth of the container, the female threaded portion 48 bites only into a predetermined long longitudinal rib 19, 47 out of the plurality of longitudinal ribs 19, 47. As a result, in order to remove the discharge cap 3 from the outer mouth portion 11 of the container body 2, the rotational force required when starting to rotate the discharge cap 3 relative to the outer mouth portion 11 is reduced, and the discharge cap 3 is removed. It can make your work easier.

Furthermore, in the first embodiment, the discharge cap 3 is provided with the air check valve 67. However, the invention is not limited to this. It is also possible to adopt a configuration in which it is not provided. When the discharge cap 3 is not provided with the air check valve 67, a small passage is provided between the discharge cap 3 and the outer edge of the inner plug 60 to connect the air inlet 46 to the outside air introduction port 13. The ventilation port 46 and the outside air introduction port 13 may be communicated with each other through a gap.

Furthermore, the container main body 2 is not limited to one formed by the above manufacturing method, and one manufactured by various methods can also be employed.

REFERENCE SIGNS LIST 1 discharge container 2 container body 3 discharge cap 10 outer layer body 11 outer mouth (mouth)
12 trunk portion 12a shoulder portion 12b trunk body portion 12c bottom portion 12d pinch-off portion 13 outside air inlet 14 neck ring 15 recessed rib 16 mouth portion side engaging portion 17 mouth portion side seal portion 18 male screw portion (screw portion)
19 Vertical rib 19a Internal thread 20 Inner layer body 21 Inner opening (mouth)
22 Accommodating portion 23 Gap 24 Expanded diameter portion 25 Flange portion 26 Longitudinal rib 30 Preform assembly 31 Outer preform 31a Extended portion 32 Inner preform 32a Extended portion 40 Cap main body 41 Top wall portion 42 Side wall portion 43 Cap side engaging portion 44 Discharge port 45 Cap-side seal portion 46 Vent 47 Vertical rib 47a Internal thread 48 Internal thread portion (screw portion)
50 Lid 51 Hinge 52 Ceiling Wall 53 Plug Member 54 Cylindrical Protrusion 55 Locking Groove 60 Middle Plug 61 Engagement Wall 62 Outflow Hole 63 Check Valve 63a Leg 64 Annular Wall 65 Cylindrical Wall 65a Valve Seat 65b Projection 66 Valve Body 67 Air check valve 100 Discharge container 200 Discharge container O Axis center S Housing space

Claims (10)

a double-structured container body comprising an outer layer body and a volume-reducing and deformable inner layer body housed inside the outer layer body, and having an outside air inlet communicating between the outer layer body and the inner layer body; ,
a discharge cap comprising a top wall portion provided with a discharge port for the contents and a cylindrical side wall portion connected to the top wall portion, and attached to the cylindrical mouth portion of the container body by plugging;
a check valve that is provided inside the discharge cap and that opens and closes a flow path of the contents toward the discharge port, the discharge container comprising:
a plurality of vertical ribs integrally provided on either one of the outer peripheral surface of the mouth portion and the inner peripheral surface of the side wall portion and extending in the vertical direction;
It is integrally provided on either the outer peripheral surface of the mouth portion or the inner peripheral surface of the side wall portion, and bites into the plurality of vertical ribs to transfer threads to the vertical ribs, and the discharge cap is attached to the mouth portion. and a threaded portion that moves along the thread and applies an upward pushing force to the discharge cap when it rotates relative to the discharge container. 2. The discharge container according to claim 1, wherein said discharge cap is made of a softer synthetic resin material than said container body. 3. The discharge container according to claim 2, wherein said container body is a polyethylene terephthalate blow-molded product formed by blow-molding a preform assembly in which an inner preform is incorporated inside an outer preform. Dispensing container according to claim 2 or 3, wherein the dispensing cap is made of polypropylene or polyethylene. 2. The discharge container according to claim 1, wherein said discharge cap is made of a synthetic resin material harder than said container body. 6. The dispensing container of claim 5, wherein the container body is a low density polyethylene blow molded article formed by extrusion blow molding a laminated parison. Dispensing container according to claim 5 or 6, wherein the dispensing cap is made of polypropylene. The discharge container according to any one of claims 1 to 7, wherein the outside air introduction port is provided in the mouth portion. an annular mouth-side seal provided on the outer peripheral surface of the mouth below the outside air introduction port;
an annular cap-side seal portion provided on the inner peripheral surface of the side wall portion and abutting against the mouth portion-side seal portion over the entire circumference to seal between the side wall portion and the mouth portion;
9. The dispensing container of claim 8, further comprising an ambient air vent provided in said top wall. The discharge container according to any one of claims 1 to 7, wherein the outside air inlet is provided at the bottom portion of the container body.

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